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_TO_CLEAR		0x0001
17 #define GHES_EXITING		0x0002
18 
19 struct ghes {
20 	union {
21 		struct acpi_hest_generic *generic;
22 		struct acpi_hest_generic_v2 *generic_v2;
23 	};
24 	struct acpi_hest_generic_status *estatus;
25 	u64 buffer_paddr;
26 	unsigned long flags;
27 	union {
28 		struct list_head list;
29 		struct timer_list timer;
30 		unsigned int irq;
31 	};
32 };
33 
34 struct ghes_estatus_node {
35 	struct llist_node llnode;
36 	struct acpi_hest_generic *generic;
37 	struct ghes *ghes;
38 };
39 
40 struct 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 
48 enum {
49 	GHES_SEV_NO = 0x0,
50 	GHES_SEV_CORRECTED = 0x1,
51 	GHES_SEV_RECOVERABLE = 0x2,
52 	GHES_SEV_PANIC = 0x3,
53 };
54 
55 /* From drivers/edac/ghes_edac.c */
56 
57 #ifdef CONFIG_EDAC_GHES
58 void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err);
59 
60 int ghes_edac_register(struct ghes *ghes, struct device *dev);
61 
62 void ghes_edac_unregister(struct ghes *ghes);
63 
64 #else
ghes_edac_report_mem_error(int sev,struct cper_sec_mem_err * mem_err)65 static inline void ghes_edac_report_mem_error(int sev,
66 				       struct cper_sec_mem_err *mem_err)
67 {
68 }
69 
ghes_edac_register(struct ghes * ghes,struct device * dev)70 static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
71 {
72 	return -ENODEV;
73 }
74 
ghes_edac_unregister(struct ghes * ghes)75 static inline void ghes_edac_unregister(struct ghes *ghes)
76 {
77 }
78 #endif
79 
acpi_hest_get_version(struct acpi_hest_generic_data * gdata)80 static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
81 {
82 	return gdata->revision >> 8;
83 }
84 
acpi_hest_get_payload(struct acpi_hest_generic_data * gdata)85 static 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 
acpi_hest_get_error_length(struct acpi_hest_generic_data * gdata)93 static 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 
acpi_hest_get_size(struct acpi_hest_generic_data * gdata)98 static 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 
acpi_hest_get_record_size(struct acpi_hest_generic_data * gdata)106 static 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 
acpi_hest_get_next(struct acpi_hest_generic_data * gdata)111 static 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
122 int ghes_notify_sea(void);
123 #else
ghes_notify_sea(void)124 static inline int ghes_notify_sea(void) { return -ENOENT; }
125 #endif
126 
127 #endif /* GHES_H */
128