include/acpi/ghes.h

   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(struct ghes *ghes, int sev,
  59                                 struct cper_sec_mem_err *mem_err);
  60
  61 int ghes_edac_register(struct ghes *ghes, struct device *dev);
  62
  63 void ghes_edac_unregister(struct ghes *ghes);
  64
  65 #else
  66 static inline void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
  67                                        struct cper_sec_mem_err *mem_err)
  68 {
  69 }
  70
  71 static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
  72 {
  73         return 0;
  74 }
  75
  76 static inline void ghes_edac_unregister(struct ghes *ghes)
  77 {
  78 }
  79 #endif
  80
  81 static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
  82 {
  83         return gdata->revision >> 8;
  84 }
  85
  86 static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata)
  87 {
  88         if (acpi_hest_get_version(gdata) >= 3)
  89                 return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1);
  90
  91         return gdata + 1;
  92 }
  93
  94 static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata)
  95 {
  96         return ((struct acpi_hest_generic_data *)(gdata))->error_data_length;
  97 }
  98
  99 static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata)
 100 {
 101         if (acpi_hest_get_version(gdata) >= 3)
 102                 return sizeof(struct acpi_hest_generic_data_v300);
 103
 104         return sizeof(struct acpi_hest_generic_data);
 105 }
 106
 107 static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata)
 108 {
 109         return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata));
 110 }
 111
 112 static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata)
 113 {
 114         return (void *)(gdata) + acpi_hest_get_record_size(gdata);
 115 }
 116
 117 #define apei_estatus_for_each_section(estatus, section)                 \
 118         for (section = (struct acpi_hest_generic_data *)(estatus + 1);  \
 119              (void *)section - (void *)(estatus + 1) < estatus->data_length; \
 120              section = acpi_hest_get_next(section))
 121
 122 int ghes_notify_sea(void);
 123
 124 #endif /* GHES_H */