drivers/acpi/acpica/utxface.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utxface - External interfaces, miscellaneous utility functions
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2015, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #define EXPORT_ACPI_INTERFACES
  45
  46 #include <acpi/acpi.h>
  47 #include "accommon.h"
  48 #include "acdebug.h"
  49
  50 #define _COMPONENT          ACPI_UTILITIES
  51 ACPI_MODULE_NAME("utxface")
  52
  53 /*******************************************************************************
  54  *
  55  * FUNCTION:    acpi_terminate
  56  *
  57  * PARAMETERS:  None
  58  *
  59  * RETURN:      Status
  60  *
  61  * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
  62  *
  63  ******************************************************************************/
  64 acpi_status __init acpi_terminate(void)
  65 {
  66         acpi_status status;
  67
  68         ACPI_FUNCTION_TRACE(acpi_terminate);
  69
  70         /* Just exit if subsystem is already shutdown */
  71
  72         if (acpi_gbl_shutdown) {
  73                 ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
  74                 return_ACPI_STATUS(AE_OK);
  75         }
  76
  77         /* Subsystem appears active, go ahead and shut it down */
  78
  79         acpi_gbl_shutdown = TRUE;
  80         acpi_gbl_startup_flags = 0;
  81         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
  82
  83         /* Terminate the AML Debugger if present */
  84
  85         ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
  86
  87         /* Shutdown and free all resources */
  88
  89         acpi_ut_subsystem_shutdown();
  90
  91         /* Free the mutex objects */
  92
  93         acpi_ut_mutex_terminate();
  94
  95         /* Now we can shutdown the OS-dependent layer */
  96
  97         status = acpi_os_terminate();
  98         return_ACPI_STATUS(status);
  99 }
 100
 101 ACPI_EXPORT_SYMBOL_INIT(acpi_terminate)
 102
 103 #ifndef ACPI_ASL_COMPILER
 104 #ifdef ACPI_FUTURE_USAGE
 105 /*******************************************************************************
 106  *
 107  * FUNCTION:    acpi_subsystem_status
 108  *
 109  * PARAMETERS:  None
 110  *
 111  * RETURN:      Status of the ACPI subsystem
 112  *
 113  * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
 114  *              before making any other calls, to ensure the subsystem
 115  *              initialized successfully.
 116  *
 117  ******************************************************************************/
 118 acpi_status acpi_subsystem_status(void)
 119 {
 120
 121         if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
 122                 return (AE_OK);
 123         } else {
 124                 return (AE_ERROR);
 125         }
 126 }
 127
 128 ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
 129
 130 /*******************************************************************************
 131  *
 132  * FUNCTION:    acpi_get_system_info
 133  *
 134  * PARAMETERS:  out_buffer      - A buffer to receive the resources for the
 135  *                                device
 136  *
 137  * RETURN:      status          - the status of the call
 138  *
 139  * DESCRIPTION: This function is called to get information about the current
 140  *              state of the ACPI subsystem. It will return system information
 141  *              in the out_buffer.
 142  *
 143  *              If the function fails an appropriate status will be returned
 144  *              and the value of out_buffer is undefined.
 145  *
 146  ******************************************************************************/
 147 acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
 148 {
 149         struct acpi_system_info *info_ptr;
 150         acpi_status status;
 151
 152         ACPI_FUNCTION_TRACE(acpi_get_system_info);
 153
 154         /* Parameter validation */
 155
 156         status = acpi_ut_validate_buffer(out_buffer);
 157         if (ACPI_FAILURE(status)) {
 158                 return_ACPI_STATUS(status);
 159         }
 160
 161         /* Validate/Allocate/Clear caller buffer */
 162
 163         status =
 164             acpi_ut_initialize_buffer(out_buffer,
 165                                       sizeof(struct acpi_system_info));
 166         if (ACPI_FAILURE(status)) {
 167                 return_ACPI_STATUS(status);
 168         }
 169
 170         /*
 171          * Populate the return buffer
 172          */
 173         info_ptr = (struct acpi_system_info *)out_buffer->pointer;
 174
 175         info_ptr->acpi_ca_version = ACPI_CA_VERSION;
 176
 177         /* System flags (ACPI capabilities) */
 178
 179         info_ptr->flags = ACPI_SYS_MODE_ACPI;
 180
 181         /* Timer resolution - 24 or 32 bits  */
 182
 183         if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
 184                 info_ptr->timer_resolution = 24;
 185         } else {
 186                 info_ptr->timer_resolution = 32;
 187         }
 188
 189         /* Clear the reserved fields */
 190
 191         info_ptr->reserved1 = 0;
 192         info_ptr->reserved2 = 0;
 193
 194         /* Current debug levels */
 195
 196         info_ptr->debug_layer = acpi_dbg_layer;
 197         info_ptr->debug_level = acpi_dbg_level;
 198
 199         return_ACPI_STATUS(AE_OK);
 200 }
 201
 202 ACPI_EXPORT_SYMBOL(acpi_get_system_info)
 203
 204 /*******************************************************************************
 205  *
 206  * FUNCTION:    acpi_get_statistics
 207  *
 208  * PARAMETERS:  stats           - Where the statistics are returned
 209  *
 210  * RETURN:      status          - the status of the call
 211  *
 212  * DESCRIPTION: Get the contents of the various system counters
 213  *
 214  ******************************************************************************/
 215 acpi_status acpi_get_statistics(struct acpi_statistics *stats)
 216 {
 217         ACPI_FUNCTION_TRACE(acpi_get_statistics);
 218
 219         /* Parameter validation */
 220
 221         if (!stats) {
 222                 return_ACPI_STATUS(AE_BAD_PARAMETER);
 223         }
 224
 225         /* Various interrupt-based event counters */
 226
 227         stats->sci_count = acpi_sci_count;
 228         stats->gpe_count = acpi_gpe_count;
 229
 230         memcpy(stats->fixed_event_count, acpi_fixed_event_count,
 231                sizeof(acpi_fixed_event_count));
 232
 233         /* Other counters */
 234
 235         stats->method_count = acpi_method_count;
 236
 237         return_ACPI_STATUS(AE_OK);
 238 }
 239
 240 ACPI_EXPORT_SYMBOL(acpi_get_statistics)
 241
 242 /*****************************************************************************
 243  *
 244  * FUNCTION:    acpi_install_initialization_handler
 245  *
 246  * PARAMETERS:  handler             - Callback procedure
 247  *              function            - Not (currently) used, see below
 248  *
 249  * RETURN:      Status
 250  *
 251  * DESCRIPTION: Install an initialization handler
 252  *
 253  * TBD: When a second function is added, must save the Function also.
 254  *
 255  ****************************************************************************/
 256 acpi_status
 257 acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
 258 {
 259
 260         if (!handler) {
 261                 return (AE_BAD_PARAMETER);
 262         }
 263
 264         if (acpi_gbl_init_handler) {
 265                 return (AE_ALREADY_EXISTS);
 266         }
 267
 268         acpi_gbl_init_handler = handler;
 269         return (AE_OK);
 270 }
 271
 272 ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
 273 #endif                          /*  ACPI_FUTURE_USAGE  */
 274
 275 /*****************************************************************************
 276  *
 277  * FUNCTION:    acpi_purge_cached_objects
 278  *
 279  * PARAMETERS:  None
 280  *
 281  * RETURN:      Status
 282  *
 283  * DESCRIPTION: Empty all caches (delete the cached objects)
 284  *
 285  ****************************************************************************/
 286 acpi_status acpi_purge_cached_objects(void)
 287 {
 288         ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
 289
 290         (void)acpi_os_purge_cache(acpi_gbl_state_cache);
 291         (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
 292         (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
 293         (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
 294
 295         return_ACPI_STATUS(AE_OK);
 296 }
 297
 298 ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
 299
 300 /*****************************************************************************
 301  *
 302  * FUNCTION:    acpi_install_interface
 303  *
 304  * PARAMETERS:  interface_name      - The interface to install
 305  *
 306  * RETURN:      Status
 307  *
 308  * DESCRIPTION: Install an _OSI interface to the global list
 309  *
 310  ****************************************************************************/
 311 acpi_status acpi_install_interface(acpi_string interface_name)
 312 {
 313         acpi_status status;
 314         struct acpi_interface_info *interface_info;
 315
 316         /* Parameter validation */
 317
 318         if (!interface_name || (strlen(interface_name) == 0)) {
 319                 return (AE_BAD_PARAMETER);
 320         }
 321
 322         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 323         if (ACPI_FAILURE(status)) {
 324                 return (status);
 325         }
 326
 327         /* Check if the interface name is already in the global list */
 328
 329         interface_info = acpi_ut_get_interface(interface_name);
 330         if (interface_info) {
 331                 /*
 332                  * The interface already exists in the list. This is OK if the
 333                  * interface has been marked invalid -- just clear the bit.
 334                  */
 335                 if (interface_info->flags & ACPI_OSI_INVALID) {
 336                         interface_info->flags &= ~ACPI_OSI_INVALID;
 337                         status = AE_OK;
 338                 } else {
 339                         status = AE_ALREADY_EXISTS;
 340                 }
 341         } else {
 342                 /* New interface name, install into the global list */
 343
 344                 status = acpi_ut_install_interface(interface_name);
 345         }
 346
 347         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 348         return (status);
 349 }
 350
 351 ACPI_EXPORT_SYMBOL(acpi_install_interface)
 352
 353 /*****************************************************************************
 354  *
 355  * FUNCTION:    acpi_remove_interface
 356  *
 357  * PARAMETERS:  interface_name      - The interface to remove
 358  *
 359  * RETURN:      Status
 360  *
 361  * DESCRIPTION: Remove an _OSI interface from the global list
 362  *
 363  ****************************************************************************/
 364 acpi_status acpi_remove_interface(acpi_string interface_name)
 365 {
 366         acpi_status status;
 367
 368         /* Parameter validation */
 369
 370         if (!interface_name || (strlen(interface_name) == 0)) {
 371                 return (AE_BAD_PARAMETER);
 372         }
 373
 374         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 375         if (ACPI_FAILURE(status)) {
 376                 return (status);
 377         }
 378
 379         status = acpi_ut_remove_interface(interface_name);
 380
 381         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 382         return (status);
 383 }
 384
 385 ACPI_EXPORT_SYMBOL(acpi_remove_interface)
 386
 387 /*****************************************************************************
 388  *
 389  * FUNCTION:    acpi_install_interface_handler
 390  *
 391  * PARAMETERS:  handler             - The _OSI interface handler to install
 392  *                                    NULL means "remove existing handler"
 393  *
 394  * RETURN:      Status
 395  *
 396  * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
 397  *              invoked during execution of the internal implementation of
 398  *              _OSI. A NULL handler simply removes any existing handler.
 399  *
 400  ****************************************************************************/
 401 acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
 402 {
 403         acpi_status status;
 404
 405         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 406         if (ACPI_FAILURE(status)) {
 407                 return (status);
 408         }
 409
 410         if (handler && acpi_gbl_interface_handler) {
 411                 status = AE_ALREADY_EXISTS;
 412         } else {
 413                 acpi_gbl_interface_handler = handler;
 414         }
 415
 416         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 417         return (status);
 418 }
 419
 420 ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
 421
 422 /*****************************************************************************
 423  *
 424  * FUNCTION:    acpi_update_interfaces
 425  *
 426  * PARAMETERS:  action              - Actions to be performed during the
 427  *                                    update
 428  *
 429  * RETURN:      Status
 430  *
 431  * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
 432  *              string or/and feature group strings.
 433  *
 434  ****************************************************************************/
 435 acpi_status acpi_update_interfaces(u8 action)
 436 {
 437         acpi_status status;
 438
 439         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 440         if (ACPI_FAILURE(status)) {
 441                 return (status);
 442         }
 443
 444         status = acpi_ut_update_interfaces(action);
 445
 446         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 447         return (status);
 448 }
 449
 450 /*****************************************************************************
 451  *
 452  * FUNCTION:    acpi_check_address_range
 453  *
 454  * PARAMETERS:  space_id            - Address space ID
 455  *              address             - Start address
 456  *              length              - Length
 457  *              warn                - TRUE if warning on overlap desired
 458  *
 459  * RETURN:      Count of the number of conflicts detected.
 460  *
 461  * DESCRIPTION: Check if the input address range overlaps any of the
 462  *              ASL operation region address ranges.
 463  *
 464  ****************************************************************************/
 465
 466 u32
 467 acpi_check_address_range(acpi_adr_space_type space_id,
 468                          acpi_physical_address address,
 469                          acpi_size length, u8 warn)
 470 {
 471         u32 overlaps;
 472         acpi_status status;
 473
 474         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
 475         if (ACPI_FAILURE(status)) {
 476                 return (0);
 477         }
 478
 479         overlaps = acpi_ut_check_address_range(space_id, address,
 480                                                (u32)length, warn);
 481
 482         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 483         return (overlaps);
 484 }
 485
 486 ACPI_EXPORT_SYMBOL(acpi_check_address_range)
 487 #endif                          /* !ACPI_ASL_COMPILER */
 488 /*******************************************************************************
 489  *
 490  * FUNCTION:    acpi_decode_pld_buffer
 491  *
 492  * PARAMETERS:  in_buffer           - Buffer returned by _PLD method
 493  *              length              - Length of the in_buffer
 494  *              return_buffer       - Where the decode buffer is returned
 495  *
 496  * RETURN:      Status and the decoded _PLD buffer. User must deallocate
 497  *              the buffer via ACPI_FREE.
 498  *
 499  * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
 500  *              a local struct that is much more useful to an ACPI driver.
 501  *
 502  ******************************************************************************/
 503 acpi_status
 504 acpi_decode_pld_buffer(u8 *in_buffer,
 505                        acpi_size length, struct acpi_pld_info ** return_buffer)
 506 {
 507         struct acpi_pld_info *pld_info;
 508         u32 *buffer = ACPI_CAST_PTR(u32, in_buffer);
 509         u32 dword;
 510
 511         /* Parameter validation */
 512
 513         if (!in_buffer || !return_buffer
 514             || (length < ACPI_PLD_REV1_BUFFER_SIZE)) {
 515                 return (AE_BAD_PARAMETER);
 516         }
 517
 518         pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info));
 519         if (!pld_info) {
 520                 return (AE_NO_MEMORY);
 521         }
 522
 523         /* First 32-bit DWord */
 524
 525         ACPI_MOVE_32_TO_32(&dword, &buffer[0]);
 526         pld_info->revision = ACPI_PLD_GET_REVISION(&dword);
 527         pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword);
 528         pld_info->red = ACPI_PLD_GET_RED(&dword);
 529         pld_info->green = ACPI_PLD_GET_GREEN(&dword);
 530         pld_info->blue = ACPI_PLD_GET_BLUE(&dword);
 531
 532         /* Second 32-bit DWord */
 533
 534         ACPI_MOVE_32_TO_32(&dword, &buffer[1]);
 535         pld_info->width = ACPI_PLD_GET_WIDTH(&dword);
 536         pld_info->height = ACPI_PLD_GET_HEIGHT(&dword);
 537
 538         /* Third 32-bit DWord */
 539
 540         ACPI_MOVE_32_TO_32(&dword, &buffer[2]);
 541         pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword);
 542         pld_info->dock = ACPI_PLD_GET_DOCK(&dword);
 543         pld_info->lid = ACPI_PLD_GET_LID(&dword);
 544         pld_info->panel = ACPI_PLD_GET_PANEL(&dword);
 545         pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword);
 546         pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword);
 547         pld_info->shape = ACPI_PLD_GET_SHAPE(&dword);
 548         pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword);
 549         pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword);
 550         pld_info->group_position = ACPI_PLD_GET_POSITION(&dword);
 551         pld_info->bay = ACPI_PLD_GET_BAY(&dword);
 552
 553         /* Fourth 32-bit DWord */
 554
 555         ACPI_MOVE_32_TO_32(&dword, &buffer[3]);
 556         pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword);
 557         pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword);
 558         pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword);
 559         pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword);
 560         pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword);
 561         pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword);
 562         pld_info->order = ACPI_PLD_GET_ORDER(&dword);
 563
 564         if (length >= ACPI_PLD_REV2_BUFFER_SIZE) {
 565
 566                 /* Fifth 32-bit DWord (Revision 2 of _PLD) */
 567
 568                 ACPI_MOVE_32_TO_32(&dword, &buffer[4]);
 569                 pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword);
 570                 pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword);
 571         }
 572
 573         *return_buffer = pld_info;
 574         return (AE_OK);
 575 }
 576
 577 ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)