drivers/acpi/acpica/acobject.h

   1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
   2 /******************************************************************************
   3  *
   4  * Name: acobject.h - Definition of union acpi_operand_object  (Internal object only)
   5  *
   6  * Copyright (C) 2000 - 2020, Intel Corp.
   7  *
   8  *****************************************************************************/
   9
  10 #ifndef _ACOBJECT_H
  11 #define _ACOBJECT_H
  12
  13 /* acpisrc:struct_defs -- for acpisrc conversion */
  14
  15 /*
  16  * The union acpi_operand_object is used to pass AML operands from the dispatcher
  17  * to the interpreter, and to keep track of the various handlers such as
  18  * address space handlers and notify handlers. The object is a constant
  19  * size in order to allow it to be cached and reused.
  20  *
  21  * Note: The object is optimized to be aligned and will not work if it is
  22  * byte-packed.
  23  */
  24 #if ACPI_MACHINE_WIDTH == 64
  25 #pragma pack(8)
  26 #else
  27 #pragma pack(4)
  28 #endif
  29
  30 /*******************************************************************************
  31  *
  32  * Common Descriptors
  33  *
  34  ******************************************************************************/
  35
  36 /*
  37  * Common area for all objects.
  38  *
  39  * descriptor_type is used to differentiate between internal descriptors, and
  40  * must be in the same place across all descriptors
  41  *
  42  * Note: The descriptor_type and Type fields must appear in the identical
  43  * position in both the struct acpi_namespace_node and union acpi_operand_object
  44  * structures.
  45  */
  46 #define ACPI_OBJECT_COMMON_HEADER \
  47         union acpi_operand_object       *next_object;       /* Objects linked to parent NS node */\
  48         u8                              descriptor_type;    /* To differentiate various internal objs */\
  49         u8                              type;               /* acpi_object_type */\
  50         u16                             reference_count;    /* For object deletion management */\
  51         u8                              flags;
  52         /*
  53          * Note: There are 3 bytes available here before the
  54          * next natural alignment boundary (for both 32/64 cases)
  55          */
  56
  57 /* Values for Flag byte above */
  58
  59 #define AOPOBJ_AML_CONSTANT         0x01        /* Integer is an AML constant */
  60 #define AOPOBJ_STATIC_POINTER       0x02        /* Data is part of an ACPI table, don't delete */
  61 #define AOPOBJ_DATA_VALID           0x04        /* Object is initialized and data is valid */
  62 #define AOPOBJ_OBJECT_INITIALIZED   0x08        /* Region is initialized */
  63 #define AOPOBJ_REG_CONNECTED        0x10        /* _REG was run */
  64 #define AOPOBJ_SETUP_COMPLETE       0x20        /* Region setup is complete */
  65 #define AOPOBJ_INVALID              0x40        /* Host OS won't allow a Region address */
  66
  67 /******************************************************************************
  68  *
  69  * Basic data types
  70  *
  71  *****************************************************************************/
  72
  73 struct acpi_object_common {
  74 ACPI_OBJECT_COMMON_HEADER};
  75
  76 struct acpi_object_integer {
  77         ACPI_OBJECT_COMMON_HEADER u8 fill[3];   /* Prevent warning on some compilers */
  78         u64 value;
  79 };
  80
  81 /*
  82  * Note: The String and Buffer object must be identical through the
  83  * pointer and length elements. There is code that depends on this.
  84  *
  85  * Fields common to both Strings and Buffers
  86  */
  87 #define ACPI_COMMON_BUFFER_INFO(_type) \
  88         _type                           *pointer; \
  89         u32                             length;
  90
  91 /* Null terminated, ASCII characters only */
  92
  93 struct acpi_object_string {
  94         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(char) /* String in AML stream or allocated string */
  95 };
  96
  97 struct acpi_object_buffer {
  98         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(u8)   /* Buffer in AML stream or allocated buffer */
  99         u32 aml_length;
 100         u8 *aml_start;
 101         struct acpi_namespace_node *node;       /* Link back to parent node */
 102 };
 103
 104 struct acpi_object_package {
 105         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;     /* Link back to parent node */
 106         union acpi_operand_object **elements;   /* Array of pointers to acpi_objects */
 107         u8 *aml_start;
 108         u32 aml_length;
 109         u32 count;              /* # of elements in package */
 110 };
 111
 112 /******************************************************************************
 113  *
 114  * Complex data types
 115  *
 116  *****************************************************************************/
 117
 118 struct acpi_object_event {
 119         ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore;  /* Actual OS synchronization object */
 120 };
 121
 122 struct acpi_object_mutex {
 123         ACPI_OBJECT_COMMON_HEADER u8 sync_level;        /* 0-15, specified in Mutex() call */
 124         u16 acquisition_depth;  /* Allow multiple Acquires, same thread */
 125         acpi_mutex os_mutex;    /* Actual OS synchronization object */
 126         acpi_thread_id thread_id;       /* Current owner of the mutex */
 127         struct acpi_thread_state *owner_thread; /* Current owner of the mutex */
 128         union acpi_operand_object *prev;        /* Link for list of acquired mutexes */
 129         union acpi_operand_object *next;        /* Link for list of acquired mutexes */
 130         struct acpi_namespace_node *node;       /* Containing namespace node */
 131         u8 original_sync_level; /* Owner's original sync level (0-15) */
 132 };
 133
 134 struct acpi_object_region {
 135         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 136         struct acpi_namespace_node *node;       /* Containing namespace node */
 137         union acpi_operand_object *handler;     /* Handler for region access */
 138         union acpi_operand_object *next;
 139         acpi_physical_address address;
 140         u32 length;
 141 };
 142
 143 struct acpi_object_method {
 144         ACPI_OBJECT_COMMON_HEADER u8 info_flags;
 145         u8 param_count;
 146         u8 sync_level;
 147         union acpi_operand_object *mutex;
 148         union acpi_operand_object *node;
 149         u8 *aml_start;
 150         union {
 151                 acpi_internal_method implementation;
 152                 union acpi_operand_object *handler;
 153         } dispatch;
 154
 155         u32 aml_length;
 156         acpi_owner_id owner_id;
 157         u8 thread_count;
 158 };
 159
 160 /* Flags for info_flags field above */
 161
 162 #define ACPI_METHOD_MODULE_LEVEL        0x01    /* Method is actually module-level code */
 163 #define ACPI_METHOD_INTERNAL_ONLY       0x02    /* Method is implemented internally (_OSI) */
 164 #define ACPI_METHOD_SERIALIZED          0x04    /* Method is serialized */
 165 #define ACPI_METHOD_SERIALIZED_PENDING  0x08    /* Method is to be marked serialized */
 166 #define ACPI_METHOD_IGNORE_SYNC_LEVEL   0x10    /* Method was auto-serialized at table load time */
 167 #define ACPI_METHOD_MODIFIED_NAMESPACE  0x20    /* Method modified the namespace */
 168
 169 /******************************************************************************
 170  *
 171  * Objects that can be notified. All share a common notify_info area.
 172  *
 173  *****************************************************************************/
 174
 175 /*
 176  * Common fields for objects that support ASL notifications
 177  */
 178 #define ACPI_COMMON_NOTIFY_INFO \
 179         union acpi_operand_object       *notify_list[2];    /* Handlers for system/device notifies */\
 180         union acpi_operand_object       *handler;       /* Handler for Address space */
 181
 182 /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
 183
 184 struct acpi_object_notify_common {
 185 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 186
 187 struct acpi_object_device {
 188         ACPI_OBJECT_COMMON_HEADER
 189             ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
 190 };
 191
 192 struct acpi_object_power_resource {
 193         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
 194         u32 resource_order;
 195 };
 196
 197 struct acpi_object_processor {
 198         ACPI_OBJECT_COMMON_HEADER
 199             /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
 200         u8 proc_id;
 201         u8 length;
 202         ACPI_COMMON_NOTIFY_INFO acpi_io_address address;
 203 };
 204
 205 struct acpi_object_thermal_zone {
 206 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 207
 208 /******************************************************************************
 209  *
 210  * Fields. All share a common header/info field.
 211  *
 212  *****************************************************************************/
 213
 214 /*
 215  * Common bitfield for the field objects
 216  * "Field Datum"  -- a datum from the actual field object
 217  * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
 218  */
 219 #define ACPI_COMMON_FIELD_INFO \
 220         u8                              field_flags;        /* Access, update, and lock bits */\
 221         u8                              attribute;          /* From access_as keyword */\
 222         u8                              access_byte_width;  /* Read/Write size in bytes */\
 223         struct acpi_namespace_node      *node;              /* Link back to parent node */\
 224         u32                             bit_length;         /* Length of field in bits */\
 225         u32                             base_byte_offset;   /* Byte offset within containing object */\
 226         u32                             value;              /* Value to store into the Bank or Index register */\
 227         u8                              start_field_bit_offset;/* Bit offset within first field datum (0-63) */\
 228         u8                              access_length;  /* For serial regions/fields */
 229
 230
 231 /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
 232
 233 struct acpi_object_field_common {
 234         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Parent Operation Region object (REGION/BANK fields only) */
 235 };
 236
 237 struct acpi_object_region_field {
 238         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO u16 resource_length;
 239         union acpi_operand_object *region_obj;  /* Containing op_region object */
 240         u8 *resource_buffer;    /* resource_template for serial regions/fields */
 241         u16 pin_number_index;   /* Index relative to previous Connection/Template */
 242         u8 *internal_pcc_buffer;        /* Internal buffer for fields associated with PCC */
 243 };
 244
 245 struct acpi_object_bank_field {
 246         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
 247         union acpi_operand_object *bank_obj;    /* bank_select Register object */
 248 };
 249
 250 struct acpi_object_index_field {
 251         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO
 252             /*
 253              * No "RegionObj" pointer needed since the Index and Data registers
 254              * are each field definitions unto themselves.
 255              */
 256         union acpi_operand_object *index_obj;   /* Index register */
 257         union acpi_operand_object *data_obj;    /* Data register */
 258 };
 259
 260 /* The buffer_field is different in that it is part of a Buffer, not an op_region */
 261
 262 struct acpi_object_buffer_field {
 263         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO u8 is_create_field;    /* Special case for objects created by create_field() */
 264         union acpi_operand_object *buffer_obj;  /* Containing Buffer object */
 265 };
 266
 267 /******************************************************************************
 268  *
 269  * Objects for handlers
 270  *
 271  *****************************************************************************/
 272
 273 struct acpi_object_notify_handler {
 274         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;     /* Parent device */
 275         u32 handler_type;       /* Type: Device/System/Both */
 276         acpi_notify_handler handler;    /* Handler address */
 277         void *context;
 278         union acpi_operand_object *next[2];     /* Device and System handler lists */
 279 };
 280
 281 struct acpi_object_addr_handler {
 282         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 283         u8 handler_flags;
 284         acpi_adr_space_handler handler;
 285         struct acpi_namespace_node *node;       /* Parent device */
 286         void *context;
 287         acpi_adr_space_setup setup;
 288         union acpi_operand_object *region_list; /* Regions using this handler */
 289         union acpi_operand_object *next;
 290 };
 291
 292 /* Flags for address handler (handler_flags) */
 293
 294 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x01
 295
 296 /******************************************************************************
 297  *
 298  * Special internal objects
 299  *
 300  *****************************************************************************/
 301
 302 /*
 303  * The Reference object is used for these opcodes:
 304  * Arg[0-6], Local[0-7], index_op, name_op, ref_of_op, load_op, load_table_op, debug_op
 305  * The Reference.Class differentiates these types.
 306  */
 307 struct acpi_object_reference {
 308         ACPI_OBJECT_COMMON_HEADER u8 class;     /* Reference Class */
 309         u8 target_type;         /* Used for Index Op */
 310         u8 resolved;            /* Reference has been resolved to a value */
 311         void *object;           /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
 312         struct acpi_namespace_node *node;       /* ref_of or Namepath */
 313         union acpi_operand_object **where;      /* Target of Index */
 314         u8 *index_pointer;      /* Used for Buffers and Strings */
 315         u8 *aml;                /* Used for deferred resolution of the ref */
 316         u32 value;              /* Used for Local/Arg/Index/ddb_handle */
 317 };
 318
 319 /* Values for Reference.Class above */
 320
 321 typedef enum {
 322         ACPI_REFCLASS_LOCAL = 0,        /* Method local */
 323         ACPI_REFCLASS_ARG = 1,  /* Method argument */
 324         ACPI_REFCLASS_REFOF = 2,        /* Result of ref_of() TBD: Split to Ref/Node and Ref/operand_obj? */
 325         ACPI_REFCLASS_INDEX = 3,        /* Result of Index() */
 326         ACPI_REFCLASS_TABLE = 4,        /* ddb_handle - Load(), load_table() */
 327         ACPI_REFCLASS_NAME = 5, /* Reference to a named object */
 328         ACPI_REFCLASS_DEBUG = 6,        /* Debug object */
 329
 330         ACPI_REFCLASS_MAX = 6
 331 } ACPI_REFERENCE_CLASSES;
 332
 333 /*
 334  * Extra object is used as additional storage for types that
 335  * have AML code in their declarations (term_args) that must be
 336  * evaluated at run time.
 337  *
 338  * Currently: Region and field_unit types
 339  */
 340 struct acpi_object_extra {
 341         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG;       /* _REG method for this region (if any) */
 342         struct acpi_namespace_node *scope_node;
 343         void *region_context;   /* Region-specific data */
 344         u8 *aml_start;
 345         u32 aml_length;
 346 };
 347
 348 /* Additional data that can be attached to namespace nodes */
 349
 350 struct acpi_object_data {
 351         ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
 352         void *pointer;
 353 };
 354
 355 /* Structure used when objects are cached for reuse */
 356
 357 struct acpi_object_cache_list {
 358         ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next;      /* Link for object cache and internal lists */
 359 };
 360
 361 /******************************************************************************
 362  *
 363  * union acpi_operand_object descriptor - a giant union of all of the above
 364  *
 365  *****************************************************************************/
 366
 367 union acpi_operand_object {
 368         struct acpi_object_common common;
 369         struct acpi_object_integer integer;
 370         struct acpi_object_string string;
 371         struct acpi_object_buffer buffer;
 372         struct acpi_object_package package;
 373         struct acpi_object_event event;
 374         struct acpi_object_method method;
 375         struct acpi_object_mutex mutex;
 376         struct acpi_object_region region;
 377         struct acpi_object_notify_common common_notify;
 378         struct acpi_object_device device;
 379         struct acpi_object_power_resource power_resource;
 380         struct acpi_object_processor processor;
 381         struct acpi_object_thermal_zone thermal_zone;
 382         struct acpi_object_field_common common_field;
 383         struct acpi_object_region_field field;
 384         struct acpi_object_buffer_field buffer_field;
 385         struct acpi_object_bank_field bank_field;
 386         struct acpi_object_index_field index_field;
 387         struct acpi_object_notify_handler notify;
 388         struct acpi_object_addr_handler address_space;
 389         struct acpi_object_reference reference;
 390         struct acpi_object_extra extra;
 391         struct acpi_object_data data;
 392         struct acpi_object_cache_list cache;
 393
 394         /*
 395          * Add namespace node to union in order to simplify code that accepts both
 396          * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
 397          * a common descriptor_type field in order to differentiate them.
 398          */
 399         struct acpi_namespace_node node;
 400 };
 401
 402 /******************************************************************************
 403  *
 404  * union acpi_descriptor - objects that share a common descriptor identifier
 405  *
 406  *****************************************************************************/
 407
 408 /* Object descriptor types */
 409
 410 #define ACPI_DESC_TYPE_CACHED           0x01    /* Used only when object is cached */
 411 #define ACPI_DESC_TYPE_STATE            0x02
 412 #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
 413 #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
 414 #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
 415 #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
 416 #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
 417 #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
 418 #define ACPI_DESC_TYPE_STATE_RESULT     0x09
 419 #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
 420 #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
 421 #define ACPI_DESC_TYPE_WALK             0x0C
 422 #define ACPI_DESC_TYPE_PARSER           0x0D
 423 #define ACPI_DESC_TYPE_OPERAND          0x0E
 424 #define ACPI_DESC_TYPE_NAMED            0x0F
 425 #define ACPI_DESC_TYPE_MAX              0x0F
 426
 427 struct acpi_common_descriptor {
 428         void *common_pointer;
 429         u8 descriptor_type;     /* To differentiate various internal objs */
 430 };
 431
 432 union acpi_descriptor {
 433         struct acpi_common_descriptor common;
 434         union acpi_operand_object object;
 435         struct acpi_namespace_node node;
 436         union acpi_parse_object op;
 437 };
 438
 439 #pragma pack()
 440
 441 #endif                          /* _ACOBJECT_H */