drivers/acpi/apei/apei-internal.h

   1 /*
   2  * apei-internal.h - ACPI Platform Error Interface internal
   3  * definations.
   4  */
   5
   6 #ifndef APEI_INTERNAL_H
   7 #define APEI_INTERNAL_H
   8
   9 #include <linux/cper.h>
  10
  11 struct apei_exec_context;
  12
  13 typedef int (*apei_exec_ins_func_t)(struct apei_exec_context *ctx,
  14                                     struct acpi_whea_header *entry);
  15
  16 #define APEI_EXEC_INS_ACCESS_REGISTER   0x0001
  17
  18 struct apei_exec_ins_type {
  19         u32 flags;
  20         apei_exec_ins_func_t run;
  21 };
  22
  23 struct apei_exec_context {
  24         u32 ip;
  25         u64 value;
  26         u64 var1;
  27         u64 var2;
  28         u64 src_base;
  29         u64 dst_base;
  30         struct apei_exec_ins_type *ins_table;
  31         u32 instructions;
  32         struct acpi_whea_header *action_table;
  33         u32 entries;
  34 };
  35
  36 void apei_exec_ctx_init(struct apei_exec_context *ctx,
  37                         struct apei_exec_ins_type *ins_table,
  38                         u32 instructions,
  39                         struct acpi_whea_header *action_table,
  40                         u32 entries);
  41
  42 static inline void apei_exec_ctx_set_input(struct apei_exec_context *ctx,
  43                                            u64 input)
  44 {
  45         ctx->value = input;
  46 }
  47
  48 static inline u64 apei_exec_ctx_get_output(struct apei_exec_context *ctx)
  49 {
  50         return ctx->value;
  51 }
  52
  53 int __apei_exec_run(struct apei_exec_context *ctx, u8 action, bool optional);
  54
  55 static inline int apei_exec_run(struct apei_exec_context *ctx, u8 action)
  56 {
  57         return __apei_exec_run(ctx, action, 0);
  58 }
  59
  60 /* It is optional whether the firmware provides the action */
  61 static inline int apei_exec_run_optional(struct apei_exec_context *ctx, u8 action)
  62 {
  63         return __apei_exec_run(ctx, action, 1);
  64 }
  65
  66 /* Common instruction implementation */
  67
  68 /* IP has been set in instruction function */
  69 #define APEI_EXEC_SET_IP        1
  70
  71 int apei_read(u64 *val, struct acpi_generic_address *reg);
  72 int apei_write(u64 val, struct acpi_generic_address *reg);
  73
  74 int __apei_exec_read_register(struct acpi_whea_header *entry, u64 *val);
  75 int __apei_exec_write_register(struct acpi_whea_header *entry, u64 val);
  76 int apei_exec_read_register(struct apei_exec_context *ctx,
  77                             struct acpi_whea_header *entry);
  78 int apei_exec_read_register_value(struct apei_exec_context *ctx,
  79                                   struct acpi_whea_header *entry);
  80 int apei_exec_write_register(struct apei_exec_context *ctx,
  81                              struct acpi_whea_header *entry);
  82 int apei_exec_write_register_value(struct apei_exec_context *ctx,
  83                                    struct acpi_whea_header *entry);
  84 int apei_exec_noop(struct apei_exec_context *ctx,
  85                    struct acpi_whea_header *entry);
  86 int apei_exec_pre_map_gars(struct apei_exec_context *ctx);
  87 int apei_exec_post_unmap_gars(struct apei_exec_context *ctx);
  88
  89 struct apei_resources {
  90         struct list_head iomem;
  91         struct list_head ioport;
  92 };
  93
  94 static inline void apei_resources_init(struct apei_resources *resources)
  95 {
  96         INIT_LIST_HEAD(&resources->iomem);
  97         INIT_LIST_HEAD(&resources->ioport);
  98 }
  99
 100 void apei_resources_fini(struct apei_resources *resources);
 101 int apei_resources_add(struct apei_resources *resources,
 102                        unsigned long start, unsigned long size,
 103                        bool iomem);
 104 int apei_resources_sub(struct apei_resources *resources1,
 105                        struct apei_resources *resources2);
 106 int apei_resources_request(struct apei_resources *resources,
 107                            const char *desc);
 108 void apei_resources_release(struct apei_resources *resources);
 109 int apei_exec_collect_resources(struct apei_exec_context *ctx,
 110                                 struct apei_resources *resources);
 111
 112 struct dentry;
 113 struct dentry *apei_get_debugfs_dir(void);
 114
 115 #define apei_estatus_for_each_section(estatus, section)                 \
 116         for (section = (struct acpi_hest_generic_data *)(estatus + 1);  \
 117              (void *)section - (void *)estatus < estatus->data_length;  \
 118              section = (void *)(section+1) + section->error_data_length)
 119
 120 static inline u32 apei_estatus_len(struct acpi_hest_generic_status *estatus)
 121 {
 122         if (estatus->raw_data_length)
 123                 return estatus->raw_data_offset + \
 124                         estatus->raw_data_length;
 125         else
 126                 return sizeof(*estatus) + estatus->data_length;
 127 }
 128
 129 void apei_estatus_print(const char *pfx,
 130                         const struct acpi_hest_generic_status *estatus);
 131 int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus);
 132 int apei_estatus_check(const struct acpi_hest_generic_status *estatus);
 133
 134 int apei_osc_setup(void);
 135 #endif