1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /****************************************************************************** 3 * 4 * Module Name: utxface - External interfaces, miscellaneous utility functions 5 * 6 * Copyright (C) 2000 - 2021, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #define EXPORT_ACPI_INTERFACES 11 12 #include <acpi/acpi.h> 13 #include "accommon.h" 14 #include "acdebug.h" 15 16 #define _COMPONENT ACPI_UTILITIES 17 ACPI_MODULE_NAME("utxface") 18 19 /******************************************************************************* 20 * 21 * FUNCTION: acpi_terminate 22 * 23 * PARAMETERS: None 24 * 25 * RETURN: Status 26 * 27 * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources. 28 * 29 ******************************************************************************/ 30 acpi_status ACPI_INIT_FUNCTION acpi_terminate(void) 31 { 32 acpi_status status; 33 34 ACPI_FUNCTION_TRACE(acpi_terminate); 35 36 /* Shutdown and free all resources */ 37 38 acpi_ut_subsystem_shutdown(); 39 40 /* Free the mutex objects */ 41 42 acpi_ut_mutex_terminate(); 43 44 /* Now we can shutdown the OS-dependent layer */ 45 46 status = acpi_os_terminate(); 47 return_ACPI_STATUS(status); 48 } 49 50 ACPI_EXPORT_SYMBOL_INIT(acpi_terminate) 51 52 #ifndef ACPI_ASL_COMPILER 53 #ifdef ACPI_FUTURE_USAGE 54 /******************************************************************************* 55 * 56 * FUNCTION: acpi_subsystem_status 57 * 58 * PARAMETERS: None 59 * 60 * RETURN: Status of the ACPI subsystem 61 * 62 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this 63 * before making any other calls, to ensure the subsystem 64 * initialized successfully. 65 * 66 ******************************************************************************/ 67 acpi_status acpi_subsystem_status(void) 68 { 69 70 if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) { 71 return (AE_OK); 72 } else { 73 return (AE_ERROR); 74 } 75 } 76 77 ACPI_EXPORT_SYMBOL(acpi_subsystem_status) 78 79 /******************************************************************************* 80 * 81 * FUNCTION: acpi_get_system_info 82 * 83 * PARAMETERS: out_buffer - A buffer to receive the resources for the 84 * device 85 * 86 * RETURN: status - the status of the call 87 * 88 * DESCRIPTION: This function is called to get information about the current 89 * state of the ACPI subsystem. It will return system information 90 * in the out_buffer. 91 * 92 * If the function fails an appropriate status will be returned 93 * and the value of out_buffer is undefined. 94 * 95 ******************************************************************************/ 96 acpi_status acpi_get_system_info(struct acpi_buffer *out_buffer) 97 { 98 struct acpi_system_info *info_ptr; 99 acpi_status status; 100 101 ACPI_FUNCTION_TRACE(acpi_get_system_info); 102 103 /* Parameter validation */ 104 105 status = acpi_ut_validate_buffer(out_buffer); 106 if (ACPI_FAILURE(status)) { 107 return_ACPI_STATUS(status); 108 } 109 110 /* Validate/Allocate/Clear caller buffer */ 111 112 status = 113 acpi_ut_initialize_buffer(out_buffer, 114 sizeof(struct acpi_system_info)); 115 if (ACPI_FAILURE(status)) { 116 return_ACPI_STATUS(status); 117 } 118 119 /* 120 * Populate the return buffer 121 */ 122 info_ptr = (struct acpi_system_info *)out_buffer->pointer; 123 info_ptr->acpi_ca_version = ACPI_CA_VERSION; 124 125 /* System flags (ACPI capabilities) */ 126 127 info_ptr->flags = ACPI_SYS_MODE_ACPI; 128 129 /* Timer resolution - 24 or 32 bits */ 130 131 if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) { 132 info_ptr->timer_resolution = 24; 133 } else { 134 info_ptr->timer_resolution = 32; 135 } 136 137 /* Clear the reserved fields */ 138 139 info_ptr->reserved1 = 0; 140 info_ptr->reserved2 = 0; 141 142 /* Current debug levels */ 143 144 info_ptr->debug_layer = acpi_dbg_layer; 145 info_ptr->debug_level = acpi_dbg_level; 146 147 return_ACPI_STATUS(AE_OK); 148 } 149 150 ACPI_EXPORT_SYMBOL(acpi_get_system_info) 151 152 /******************************************************************************* 153 * 154 * FUNCTION: acpi_get_statistics 155 * 156 * PARAMETERS: stats - Where the statistics are returned 157 * 158 * RETURN: status - the status of the call 159 * 160 * DESCRIPTION: Get the contents of the various system counters 161 * 162 ******************************************************************************/ 163 acpi_status acpi_get_statistics(struct acpi_statistics *stats) 164 { 165 ACPI_FUNCTION_TRACE(acpi_get_statistics); 166 167 /* Parameter validation */ 168 169 if (!stats) { 170 return_ACPI_STATUS(AE_BAD_PARAMETER); 171 } 172 173 /* Various interrupt-based event counters */ 174 175 stats->sci_count = acpi_sci_count; 176 stats->gpe_count = acpi_gpe_count; 177 178 memcpy(stats->fixed_event_count, acpi_fixed_event_count, 179 sizeof(acpi_fixed_event_count)); 180 181 /* Other counters */ 182 183 stats->method_count = acpi_method_count; 184 return_ACPI_STATUS(AE_OK); 185 } 186 187 ACPI_EXPORT_SYMBOL(acpi_get_statistics) 188 189 /***************************************************************************** 190 * 191 * FUNCTION: acpi_install_initialization_handler 192 * 193 * PARAMETERS: handler - Callback procedure 194 * function - Not (currently) used, see below 195 * 196 * RETURN: Status 197 * 198 * DESCRIPTION: Install an initialization handler 199 * 200 * TBD: When a second function is added, must save the Function also. 201 * 202 ****************************************************************************/ 203 acpi_status 204 acpi_install_initialization_handler(acpi_init_handler handler, u32 function) 205 { 206 207 if (!handler) { 208 return (AE_BAD_PARAMETER); 209 } 210 211 if (acpi_gbl_init_handler) { 212 return (AE_ALREADY_EXISTS); 213 } 214 215 acpi_gbl_init_handler = handler; 216 return (AE_OK); 217 } 218 219 ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler) 220 #endif 221 222 /***************************************************************************** 223 * 224 * FUNCTION: acpi_purge_cached_objects 225 * 226 * PARAMETERS: None 227 * 228 * RETURN: Status 229 * 230 * DESCRIPTION: Empty all caches (delete the cached objects) 231 * 232 ****************************************************************************/ 233 acpi_status acpi_purge_cached_objects(void) 234 { 235 ACPI_FUNCTION_TRACE(acpi_purge_cached_objects); 236 237 (void)acpi_os_purge_cache(acpi_gbl_state_cache); 238 (void)acpi_os_purge_cache(acpi_gbl_operand_cache); 239 (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache); 240 (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache); 241 242 return_ACPI_STATUS(AE_OK); 243 } 244 245 ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects) 246 247 /***************************************************************************** 248 * 249 * FUNCTION: acpi_install_interface 250 * 251 * PARAMETERS: interface_name - The interface to install 252 * 253 * RETURN: Status 254 * 255 * DESCRIPTION: Install an _OSI interface to the global list 256 * 257 ****************************************************************************/ 258 acpi_status acpi_install_interface(acpi_string interface_name) 259 { 260 acpi_status status; 261 struct acpi_interface_info *interface_info; 262 263 /* Parameter validation */ 264 265 if (!interface_name || (strlen(interface_name) == 0)) { 266 return (AE_BAD_PARAMETER); 267 } 268 269 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 270 if (ACPI_FAILURE(status)) { 271 return (status); 272 } 273 274 /* Check if the interface name is already in the global list */ 275 276 interface_info = acpi_ut_get_interface(interface_name); 277 if (interface_info) { 278 /* 279 * The interface already exists in the list. This is OK if the 280 * interface has been marked invalid -- just clear the bit. 281 */ 282 if (interface_info->flags & ACPI_OSI_INVALID) { 283 interface_info->flags &= ~ACPI_OSI_INVALID; 284 status = AE_OK; 285 } else { 286 status = AE_ALREADY_EXISTS; 287 } 288 } else { 289 /* New interface name, install into the global list */ 290 291 status = acpi_ut_install_interface(interface_name); 292 } 293 294 acpi_os_release_mutex(acpi_gbl_osi_mutex); 295 return (status); 296 } 297 298 ACPI_EXPORT_SYMBOL(acpi_install_interface) 299 300 /***************************************************************************** 301 * 302 * FUNCTION: acpi_remove_interface 303 * 304 * PARAMETERS: interface_name - The interface to remove 305 * 306 * RETURN: Status 307 * 308 * DESCRIPTION: Remove an _OSI interface from the global list 309 * 310 ****************************************************************************/ 311 acpi_status acpi_remove_interface(acpi_string interface_name) 312 { 313 acpi_status status; 314 315 /* Parameter validation */ 316 317 if (!interface_name || (strlen(interface_name) == 0)) { 318 return (AE_BAD_PARAMETER); 319 } 320 321 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 322 if (ACPI_FAILURE(status)) { 323 return (status); 324 } 325 326 status = acpi_ut_remove_interface(interface_name); 327 328 acpi_os_release_mutex(acpi_gbl_osi_mutex); 329 return (status); 330 } 331 332 ACPI_EXPORT_SYMBOL(acpi_remove_interface) 333 334 /***************************************************************************** 335 * 336 * FUNCTION: acpi_install_interface_handler 337 * 338 * PARAMETERS: handler - The _OSI interface handler to install 339 * NULL means "remove existing handler" 340 * 341 * RETURN: Status 342 * 343 * DESCRIPTION: Install a handler for the predefined _OSI ACPI method. 344 * invoked during execution of the internal implementation of 345 * _OSI. A NULL handler simply removes any existing handler. 346 * 347 ****************************************************************************/ 348 acpi_status acpi_install_interface_handler(acpi_interface_handler handler) 349 { 350 acpi_status status; 351 352 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 353 if (ACPI_FAILURE(status)) { 354 return (status); 355 } 356 357 if (handler && acpi_gbl_interface_handler) { 358 status = AE_ALREADY_EXISTS; 359 } else { 360 acpi_gbl_interface_handler = handler; 361 } 362 363 acpi_os_release_mutex(acpi_gbl_osi_mutex); 364 return (status); 365 } 366 367 ACPI_EXPORT_SYMBOL(acpi_install_interface_handler) 368 369 /***************************************************************************** 370 * 371 * FUNCTION: acpi_update_interfaces 372 * 373 * PARAMETERS: action - Actions to be performed during the 374 * update 375 * 376 * RETURN: Status 377 * 378 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 379 * string or/and feature group strings. 380 * 381 ****************************************************************************/ 382 acpi_status acpi_update_interfaces(u8 action) 383 { 384 acpi_status status; 385 386 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 387 if (ACPI_FAILURE(status)) { 388 return (status); 389 } 390 391 status = acpi_ut_update_interfaces(action); 392 393 acpi_os_release_mutex(acpi_gbl_osi_mutex); 394 return (status); 395 } 396 397 /***************************************************************************** 398 * 399 * FUNCTION: acpi_check_address_range 400 * 401 * PARAMETERS: space_id - Address space ID 402 * address - Start address 403 * length - Length 404 * warn - TRUE if warning on overlap desired 405 * 406 * RETURN: Count of the number of conflicts detected. 407 * 408 * DESCRIPTION: Check if the input address range overlaps any of the 409 * ASL operation region address ranges. 410 * 411 ****************************************************************************/ 412 413 u32 414 acpi_check_address_range(acpi_adr_space_type space_id, 415 acpi_physical_address address, 416 acpi_size length, u8 warn) 417 { 418 u32 overlaps; 419 acpi_status status; 420 421 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); 422 if (ACPI_FAILURE(status)) { 423 return (0); 424 } 425 426 overlaps = acpi_ut_check_address_range(space_id, address, 427 (u32)length, warn); 428 429 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); 430 return (overlaps); 431 } 432 433 ACPI_EXPORT_SYMBOL(acpi_check_address_range) 434 #endif /* !ACPI_ASL_COMPILER */ 435 /******************************************************************************* 436 * 437 * FUNCTION: acpi_decode_pld_buffer 438 * 439 * PARAMETERS: in_buffer - Buffer returned by _PLD method 440 * length - Length of the in_buffer 441 * return_buffer - Where the decode buffer is returned 442 * 443 * RETURN: Status and the decoded _PLD buffer. User must deallocate 444 * the buffer via ACPI_FREE. 445 * 446 * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into 447 * a local struct that is much more useful to an ACPI driver. 448 * 449 ******************************************************************************/ 450 acpi_status 451 acpi_decode_pld_buffer(u8 *in_buffer, 452 acpi_size length, struct acpi_pld_info **return_buffer) 453 { 454 struct acpi_pld_info *pld_info; 455 u32 *buffer = ACPI_CAST_PTR(u32, in_buffer); 456 u32 dword; 457 458 /* Parameter validation */ 459 460 if (!in_buffer || !return_buffer 461 || (length < ACPI_PLD_REV1_BUFFER_SIZE)) { 462 return (AE_BAD_PARAMETER); 463 } 464 465 pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info)); 466 if (!pld_info) { 467 return (AE_NO_MEMORY); 468 } 469 470 /* First 32-bit DWord */ 471 472 ACPI_MOVE_32_TO_32(&dword, &buffer[0]); 473 pld_info->revision = ACPI_PLD_GET_REVISION(&dword); 474 pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword); 475 pld_info->red = ACPI_PLD_GET_RED(&dword); 476 pld_info->green = ACPI_PLD_GET_GREEN(&dword); 477 pld_info->blue = ACPI_PLD_GET_BLUE(&dword); 478 479 /* Second 32-bit DWord */ 480 481 ACPI_MOVE_32_TO_32(&dword, &buffer[1]); 482 pld_info->width = ACPI_PLD_GET_WIDTH(&dword); 483 pld_info->height = ACPI_PLD_GET_HEIGHT(&dword); 484 485 /* Third 32-bit DWord */ 486 487 ACPI_MOVE_32_TO_32(&dword, &buffer[2]); 488 pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword); 489 pld_info->dock = ACPI_PLD_GET_DOCK(&dword); 490 pld_info->lid = ACPI_PLD_GET_LID(&dword); 491 pld_info->panel = ACPI_PLD_GET_PANEL(&dword); 492 pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword); 493 pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword); 494 pld_info->shape = ACPI_PLD_GET_SHAPE(&dword); 495 pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword); 496 pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword); 497 pld_info->group_position = ACPI_PLD_GET_POSITION(&dword); 498 pld_info->bay = ACPI_PLD_GET_BAY(&dword); 499 500 /* Fourth 32-bit DWord */ 501 502 ACPI_MOVE_32_TO_32(&dword, &buffer[3]); 503 pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword); 504 pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword); 505 pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword); 506 pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword); 507 pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword); 508 pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword); 509 pld_info->order = ACPI_PLD_GET_ORDER(&dword); 510 511 if (length >= ACPI_PLD_REV2_BUFFER_SIZE) { 512 513 /* Fifth 32-bit DWord (Revision 2 of _PLD) */ 514 515 ACPI_MOVE_32_TO_32(&dword, &buffer[4]); 516 pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword); 517 pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword); 518 } 519 520 *return_buffer = pld_info; 521 return (AE_OK); 522 } 523 524 ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer) 525