drivers/acpi/acpica/utxface.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utxface - External interfaces, miscellaneous utility functions
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, 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 ACPI_INIT_FUNCTION acpi_terminate(void)
  65 {
  66         acpi_status status;
  67
  68         ACPI_FUNCTION_TRACE(acpi_terminate);
  69
  70         /* Shutdown and free all resources */
  71
  72         acpi_ut_subsystem_shutdown();
  73
  74         /* Free the mutex objects */
  75
  76         acpi_ut_mutex_terminate();
  77
  78         /* Now we can shutdown the OS-dependent layer */
  79
  80         status = acpi_os_terminate();
  81         return_ACPI_STATUS(status);
  82 }
  83
  84 ACPI_EXPORT_SYMBOL_INIT(acpi_terminate)
  85
  86 #ifndef ACPI_ASL_COMPILER
  87 #ifdef ACPI_FUTURE_USAGE
  88 /*******************************************************************************
  89  *
  90  * FUNCTION:    acpi_subsystem_status
  91  *
  92  * PARAMETERS:  None
  93  *
  94  * RETURN:      Status of the ACPI subsystem
  95  *
  96  * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
  97  *              before making any other calls, to ensure the subsystem
  98  *              initialized successfully.
  99  *
 100  ******************************************************************************/
 101 acpi_status acpi_subsystem_status(void)
 102 {
 103
 104         if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
 105                 return (AE_OK);
 106         } else {
 107                 return (AE_ERROR);
 108         }
 109 }
 110
 111 ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
 112
 113 /*******************************************************************************
 114  *
 115  * FUNCTION:    acpi_get_system_info
 116  *
 117  * PARAMETERS:  out_buffer      - A buffer to receive the resources for the
 118  *                                device
 119  *
 120  * RETURN:      status          - the status of the call
 121  *
 122  * DESCRIPTION: This function is called to get information about the current
 123  *              state of the ACPI subsystem. It will return system information
 124  *              in the out_buffer.
 125  *
 126  *              If the function fails an appropriate status will be returned
 127  *              and the value of out_buffer is undefined.
 128  *
 129  ******************************************************************************/
 130 acpi_status acpi_get_system_info(struct acpi_buffer *out_buffer)
 131 {
 132         struct acpi_system_info *info_ptr;
 133         acpi_status status;
 134
 135         ACPI_FUNCTION_TRACE(acpi_get_system_info);
 136
 137         /* Parameter validation */
 138
 139         status = acpi_ut_validate_buffer(out_buffer);
 140         if (ACPI_FAILURE(status)) {
 141                 return_ACPI_STATUS(status);
 142         }
 143
 144         /* Validate/Allocate/Clear caller buffer */
 145
 146         status =
 147             acpi_ut_initialize_buffer(out_buffer,
 148                                       sizeof(struct acpi_system_info));
 149         if (ACPI_FAILURE(status)) {
 150                 return_ACPI_STATUS(status);
 151         }
 152
 153         /*
 154          * Populate the return buffer
 155          */
 156         info_ptr = (struct acpi_system_info *)out_buffer->pointer;
 157         info_ptr->acpi_ca_version = ACPI_CA_VERSION;
 158
 159         /* System flags (ACPI capabilities) */
 160
 161         info_ptr->flags = ACPI_SYS_MODE_ACPI;
 162
 163         /* Timer resolution - 24 or 32 bits  */
 164
 165         if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
 166                 info_ptr->timer_resolution = 24;
 167         } else {
 168                 info_ptr->timer_resolution = 32;
 169         }
 170
 171         /* Clear the reserved fields */
 172
 173         info_ptr->reserved1 = 0;
 174         info_ptr->reserved2 = 0;
 175
 176         /* Current debug levels */
 177
 178         info_ptr->debug_layer = acpi_dbg_layer;
 179         info_ptr->debug_level = acpi_dbg_level;
 180
 181         return_ACPI_STATUS(AE_OK);
 182 }
 183
 184 ACPI_EXPORT_SYMBOL(acpi_get_system_info)
 185
 186 /*******************************************************************************
 187  *
 188  * FUNCTION:    acpi_get_statistics
 189  *
 190  * PARAMETERS:  stats           - Where the statistics are returned
 191  *
 192  * RETURN:      status          - the status of the call
 193  *
 194  * DESCRIPTION: Get the contents of the various system counters
 195  *
 196  ******************************************************************************/
 197 acpi_status acpi_get_statistics(struct acpi_statistics *stats)
 198 {
 199         ACPI_FUNCTION_TRACE(acpi_get_statistics);
 200
 201         /* Parameter validation */
 202
 203         if (!stats) {
 204                 return_ACPI_STATUS(AE_BAD_PARAMETER);
 205         }
 206
 207         /* Various interrupt-based event counters */
 208
 209         stats->sci_count = acpi_sci_count;
 210         stats->gpe_count = acpi_gpe_count;
 211
 212         memcpy(stats->fixed_event_count, acpi_fixed_event_count,
 213                sizeof(acpi_fixed_event_count));
 214
 215         /* Other counters */
 216
 217         stats->method_count = acpi_method_count;
 218         return_ACPI_STATUS(AE_OK);
 219 }
 220
 221 ACPI_EXPORT_SYMBOL(acpi_get_statistics)
 222
 223 /*****************************************************************************
 224  *
 225  * FUNCTION:    acpi_install_initialization_handler
 226  *
 227  * PARAMETERS:  handler             - Callback procedure
 228  *              function            - Not (currently) used, see below
 229  *
 230  * RETURN:      Status
 231  *
 232  * DESCRIPTION: Install an initialization handler
 233  *
 234  * TBD: When a second function is added, must save the Function also.
 235  *
 236  ****************************************************************************/
 237 acpi_status
 238 acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
 239 {
 240
 241         if (!handler) {
 242                 return (AE_BAD_PARAMETER);
 243         }
 244
 245         if (acpi_gbl_init_handler) {
 246                 return (AE_ALREADY_EXISTS);
 247         }
 248
 249         acpi_gbl_init_handler = handler;
 250         return (AE_OK);
 251 }
 252
 253 ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
 254 #endif
 255
 256 /*****************************************************************************
 257  *
 258  * FUNCTION:    acpi_purge_cached_objects
 259  *
 260  * PARAMETERS:  None
 261  *
 262  * RETURN:      Status
 263  *
 264  * DESCRIPTION: Empty all caches (delete the cached objects)
 265  *
 266  ****************************************************************************/
 267 acpi_status acpi_purge_cached_objects(void)
 268 {
 269         ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
 270
 271         (void)acpi_os_purge_cache(acpi_gbl_state_cache);
 272         (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
 273         (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
 274         (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
 275
 276         return_ACPI_STATUS(AE_OK);
 277 }
 278
 279 ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
 280
 281 /*****************************************************************************
 282  *
 283  * FUNCTION:    acpi_install_interface
 284  *
 285  * PARAMETERS:  interface_name      - The interface to install
 286  *
 287  * RETURN:      Status
 288  *
 289  * DESCRIPTION: Install an _OSI interface to the global list
 290  *
 291  ****************************************************************************/
 292 acpi_status acpi_install_interface(acpi_string interface_name)
 293 {
 294         acpi_status status;
 295         struct acpi_interface_info *interface_info;
 296
 297         /* Parameter validation */
 298
 299         if (!interface_name || (strlen(interface_name) == 0)) {
 300                 return (AE_BAD_PARAMETER);
 301         }
 302
 303         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 304         if (ACPI_FAILURE(status)) {
 305                 return (status);
 306         }
 307
 308         /* Check if the interface name is already in the global list */
 309
 310         interface_info = acpi_ut_get_interface(interface_name);
 311         if (interface_info) {
 312                 /*
 313                  * The interface already exists in the list. This is OK if the
 314                  * interface has been marked invalid -- just clear the bit.
 315                  */
 316                 if (interface_info->flags & ACPI_OSI_INVALID) {
 317                         interface_info->flags &= ~ACPI_OSI_INVALID;
 318                         status = AE_OK;
 319                 } else {
 320                         status = AE_ALREADY_EXISTS;
 321                 }
 322         } else {
 323                 /* New interface name, install into the global list */
 324
 325                 status = acpi_ut_install_interface(interface_name);
 326         }
 327
 328         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 329         return (status);
 330 }
 331
 332 ACPI_EXPORT_SYMBOL(acpi_install_interface)
 333
 334 /*****************************************************************************
 335  *
 336  * FUNCTION:    acpi_remove_interface
 337  *
 338  * PARAMETERS:  interface_name      - The interface to remove
 339  *
 340  * RETURN:      Status
 341  *
 342  * DESCRIPTION: Remove an _OSI interface from the global list
 343  *
 344  ****************************************************************************/
 345 acpi_status acpi_remove_interface(acpi_string interface_name)
 346 {
 347         acpi_status status;
 348
 349         /* Parameter validation */
 350
 351         if (!interface_name || (strlen(interface_name) == 0)) {
 352                 return (AE_BAD_PARAMETER);
 353         }
 354
 355         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 356         if (ACPI_FAILURE(status)) {
 357                 return (status);
 358         }
 359
 360         status = acpi_ut_remove_interface(interface_name);
 361
 362         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 363         return (status);
 364 }
 365
 366 ACPI_EXPORT_SYMBOL(acpi_remove_interface)
 367
 368 /*****************************************************************************
 369  *
 370  * FUNCTION:    acpi_install_interface_handler
 371  *
 372  * PARAMETERS:  handler             - The _OSI interface handler to install
 373  *                                    NULL means "remove existing handler"
 374  *
 375  * RETURN:      Status
 376  *
 377  * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
 378  *              invoked during execution of the internal implementation of
 379  *              _OSI. A NULL handler simply removes any existing handler.
 380  *
 381  ****************************************************************************/
 382 acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
 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         if (handler && acpi_gbl_interface_handler) {
 392                 status = AE_ALREADY_EXISTS;
 393         } else {
 394                 acpi_gbl_interface_handler = handler;
 395         }
 396
 397         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 398         return (status);
 399 }
 400
 401 ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
 402
 403 /*****************************************************************************
 404  *
 405  * FUNCTION:    acpi_update_interfaces
 406  *
 407  * PARAMETERS:  action              - Actions to be performed during the
 408  *                                    update
 409  *
 410  * RETURN:      Status
 411  *
 412  * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
 413  *              string or/and feature group strings.
 414  *
 415  ****************************************************************************/
 416 acpi_status acpi_update_interfaces(u8 action)
 417 {
 418         acpi_status status;
 419
 420         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 421         if (ACPI_FAILURE(status)) {
 422                 return (status);
 423         }
 424
 425         status = acpi_ut_update_interfaces(action);
 426
 427         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 428         return (status);
 429 }
 430
 431 /*****************************************************************************
 432  *
 433  * FUNCTION:    acpi_check_address_range
 434  *
 435  * PARAMETERS:  space_id            - Address space ID
 436  *              address             - Start address
 437  *              length              - Length
 438  *              warn                - TRUE if warning on overlap desired
 439  *
 440  * RETURN:      Count of the number of conflicts detected.
 441  *
 442  * DESCRIPTION: Check if the input address range overlaps any of the
 443  *              ASL operation region address ranges.
 444  *
 445  ****************************************************************************/
 446
 447 u32
 448 acpi_check_address_range(acpi_adr_space_type space_id,
 449                          acpi_physical_address address,
 450                          acpi_size length, u8 warn)
 451 {
 452         u32 overlaps;
 453         acpi_status status;
 454
 455         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
 456         if (ACPI_FAILURE(status)) {
 457                 return (0);
 458         }
 459
 460         overlaps = acpi_ut_check_address_range(space_id, address,
 461                                                (u32)length, warn);
 462
 463         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 464         return (overlaps);
 465 }
 466
 467 ACPI_EXPORT_SYMBOL(acpi_check_address_range)
 468 #endif                          /* !ACPI_ASL_COMPILER */
 469 /*******************************************************************************
 470  *
 471  * FUNCTION:    acpi_decode_pld_buffer
 472  *
 473  * PARAMETERS:  in_buffer           - Buffer returned by _PLD method
 474  *              length              - Length of the in_buffer
 475  *              return_buffer       - Where the decode buffer is returned
 476  *
 477  * RETURN:      Status and the decoded _PLD buffer. User must deallocate
 478  *              the buffer via ACPI_FREE.
 479  *
 480  * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
 481  *              a local struct that is much more useful to an ACPI driver.
 482  *
 483  ******************************************************************************/
 484 acpi_status
 485 acpi_decode_pld_buffer(u8 *in_buffer,
 486                        acpi_size length, struct acpi_pld_info **return_buffer)
 487 {
 488         struct acpi_pld_info *pld_info;
 489         u32 *buffer = ACPI_CAST_PTR(u32, in_buffer);
 490         u32 dword;
 491
 492         /* Parameter validation */
 493
 494         if (!in_buffer || !return_buffer
 495             || (length < ACPI_PLD_REV1_BUFFER_SIZE)) {
 496                 return (AE_BAD_PARAMETER);
 497         }
 498
 499         pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info));
 500         if (!pld_info) {
 501                 return (AE_NO_MEMORY);
 502         }
 503
 504         /* First 32-bit DWord */
 505
 506         ACPI_MOVE_32_TO_32(&dword, &buffer[0]);
 507         pld_info->revision = ACPI_PLD_GET_REVISION(&dword);
 508         pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword);
 509         pld_info->red = ACPI_PLD_GET_RED(&dword);
 510         pld_info->green = ACPI_PLD_GET_GREEN(&dword);
 511         pld_info->blue = ACPI_PLD_GET_BLUE(&dword);
 512
 513         /* Second 32-bit DWord */
 514
 515         ACPI_MOVE_32_TO_32(&dword, &buffer[1]);
 516         pld_info->width = ACPI_PLD_GET_WIDTH(&dword);
 517         pld_info->height = ACPI_PLD_GET_HEIGHT(&dword);
 518
 519         /* Third 32-bit DWord */
 520
 521         ACPI_MOVE_32_TO_32(&dword, &buffer[2]);
 522         pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword);
 523         pld_info->dock = ACPI_PLD_GET_DOCK(&dword);
 524         pld_info->lid = ACPI_PLD_GET_LID(&dword);
 525         pld_info->panel = ACPI_PLD_GET_PANEL(&dword);
 526         pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword);
 527         pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword);
 528         pld_info->shape = ACPI_PLD_GET_SHAPE(&dword);
 529         pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword);
 530         pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword);
 531         pld_info->group_position = ACPI_PLD_GET_POSITION(&dword);
 532         pld_info->bay = ACPI_PLD_GET_BAY(&dword);
 533
 534         /* Fourth 32-bit DWord */
 535
 536         ACPI_MOVE_32_TO_32(&dword, &buffer[3]);
 537         pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword);
 538         pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword);
 539         pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword);
 540         pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword);
 541         pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword);
 542         pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword);
 543         pld_info->order = ACPI_PLD_GET_ORDER(&dword);
 544
 545         if (length >= ACPI_PLD_REV2_BUFFER_SIZE) {
 546
 547                 /* Fifth 32-bit DWord (Revision 2 of _PLD) */
 548
 549                 ACPI_MOVE_32_TO_32(&dword, &buffer[4]);
 550                 pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword);
 551                 pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword);
 552         }
 553
 554         *return_buffer = pld_info;
 555         return (AE_OK);
 556 }
 557
 558 ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)