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_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 };
  31
  32 struct ghes_estatus_node {
  33         struct llist_node llnode;
  34         struct acpi_hest_generic *generic;
  35         struct ghes *ghes;
  36 };
  37
  38 struct ghes_estatus_cache {
  39         u32 estatus_len;
  40         atomic_t count;
  41         struct acpi_hest_generic *generic;
  42         unsigned long long time_in;
  43         struct rcu_head rcu;
  44 };
  45
  46 enum {
  47         GHES_SEV_NO = 0x0,
  48         GHES_SEV_CORRECTED = 0x1,
  49         GHES_SEV_RECOVERABLE = 0x2,
  50         GHES_SEV_PANIC = 0x3,
  51 };
  52
  53 int ghes_estatus_pool_init(int num_ghes);
  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
  65 static inline void ghes_edac_report_mem_error(int sev,
  66                                        struct cper_sec_mem_err *mem_err)
  67 {
  68 }
  69
  70 static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
  71 {
  72         return -ENODEV;
  73 }
  74
  75 static inline void ghes_edac_unregister(struct ghes *ghes)
  76 {
  77 }
  78 #endif
  79
  80 static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
  81 {
  82         return gdata->revision >> 8;
  83 }
  84
  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
  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
  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
 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
 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
 124 static inline int ghes_notify_sea(void) { return -ENOENT; }
 125 #endif
 126
 127 #endif /* GHES_H */