kernel/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         /* 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
 158         info_ptr->acpi_ca_version = ACPI_CA_VERSION;
 159
 160         /* System flags (ACPI capabilities) */
 161
 162         info_ptr->flags = ACPI_SYS_MODE_ACPI;
 163
 164         /* Timer resolution - 24 or 32 bits  */
 165
 166         if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
 167                 info_ptr->timer_resolution = 24;
 168         } else {
 169                 info_ptr->timer_resolution = 32;
 170         }
 171
 172         /* Clear the reserved fields */
 173
 174         info_ptr->reserved1 = 0;
 175         info_ptr->reserved2 = 0;
 176
 177         /* Current debug levels */
 178
 179         info_ptr->debug_layer = acpi_dbg_layer;
 180         info_ptr->debug_level = acpi_dbg_level;
 181
 182         return_ACPI_STATUS(AE_OK);
 183 }
 184
 185 ACPI_EXPORT_SYMBOL(acpi_get_system_info)
 186
 187 /*******************************************************************************
 188  *
 189  * FUNCTION:    acpi_get_statistics
 190  *
 191  * PARAMETERS:  stats           - Where the statistics are returned
 192  *
 193  * RETURN:      status          - the status of the call
 194  *
 195  * DESCRIPTION: Get the contents of the various system counters
 196  *
 197  ******************************************************************************/
 198 acpi_status acpi_get_statistics(struct acpi_statistics *stats)
 199 {
 200         ACPI_FUNCTION_TRACE(acpi_get_statistics);
 201
 202         /* Parameter validation */
 203
 204         if (!stats) {
 205                 return_ACPI_STATUS(AE_BAD_PARAMETER);
 206         }
 207
 208         /* Various interrupt-based event counters */
 209
 210         stats->sci_count = acpi_sci_count;
 211         stats->gpe_count = acpi_gpe_count;
 212
 213         memcpy(stats->fixed_event_count, acpi_fixed_event_count,
 214                sizeof(acpi_fixed_event_count));
 215
 216         /* Other counters */
 217
 218         stats->method_count = acpi_method_count;
 219
 220         return_ACPI_STATUS(AE_OK);
 221 }
 222
 223 ACPI_EXPORT_SYMBOL(acpi_get_statistics)
 224
 225 /*****************************************************************************
 226  *
 227  * FUNCTION:    acpi_install_initialization_handler
 228  *
 229  * PARAMETERS:  handler             - Callback procedure
 230  *              function            - Not (currently) used, see below
 231  *
 232  * RETURN:      Status
 233  *
 234  * DESCRIPTION: Install an initialization handler
 235  *
 236  * TBD: When a second function is added, must save the Function also.
 237  *
 238  ****************************************************************************/
 239 acpi_status
 240 acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
 241 {
 242
 243         if (!handler) {
 244                 return (AE_BAD_PARAMETER);
 245         }
 246
 247         if (acpi_gbl_init_handler) {
 248                 return (AE_ALREADY_EXISTS);
 249         }
 250
 251         acpi_gbl_init_handler = handler;
 252         return (AE_OK);
 253 }
 254
 255 ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
 256 #endif
 257
 258 /*****************************************************************************
 259  *
 260  * FUNCTION:    acpi_purge_cached_objects
 261  *
 262  * PARAMETERS:  None
 263  *
 264  * RETURN:      Status
 265  *
 266  * DESCRIPTION: Empty all caches (delete the cached objects)
 267  *
 268  ****************************************************************************/
 269 acpi_status acpi_purge_cached_objects(void)
 270 {
 271         ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
 272
 273         (void)acpi_os_purge_cache(acpi_gbl_state_cache);
 274         (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
 275         (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
 276         (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
 277
 278         return_ACPI_STATUS(AE_OK);
 279 }
 280
 281 ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
 282
 283 /*****************************************************************************
 284  *
 285  * FUNCTION:    acpi_install_interface
 286  *
 287  * PARAMETERS:  interface_name      - The interface to install
 288  *
 289  * RETURN:      Status
 290  *
 291  * DESCRIPTION: Install an _OSI interface to the global list
 292  *
 293  ****************************************************************************/
 294 acpi_status acpi_install_interface(acpi_string interface_name)
 295 {
 296         acpi_status status;
 297         struct acpi_interface_info *interface_info;
 298
 299         /* Parameter validation */
 300
 301         if (!interface_name || (strlen(interface_name) == 0)) {
 302                 return (AE_BAD_PARAMETER);
 303         }
 304
 305         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 306         if (ACPI_FAILURE(status)) {
 307                 return (status);
 308         }
 309
 310         /* Check if the interface name is already in the global list */
 311
 312         interface_info = acpi_ut_get_interface(interface_name);
 313         if (interface_info) {
 314                 /*
 315                  * The interface already exists in the list. This is OK if the
 316                  * interface has been marked invalid -- just clear the bit.
 317                  */
 318                 if (interface_info->flags & ACPI_OSI_INVALID) {
 319                         interface_info->flags &= ~ACPI_OSI_INVALID;
 320                         status = AE_OK;
 321                 } else {
 322                         status = AE_ALREADY_EXISTS;
 323                 }
 324         } else {
 325                 /* New interface name, install into the global list */
 326
 327                 status = acpi_ut_install_interface(interface_name);
 328         }
 329
 330         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 331         return (status);
 332 }
 333
 334 ACPI_EXPORT_SYMBOL(acpi_install_interface)
 335
 336 /*****************************************************************************
 337  *
 338  * FUNCTION:    acpi_remove_interface
 339  *
 340  * PARAMETERS:  interface_name      - The interface to remove
 341  *
 342  * RETURN:      Status
 343  *
 344  * DESCRIPTION: Remove an _OSI interface from the global list
 345  *
 346  ****************************************************************************/
 347 acpi_status acpi_remove_interface(acpi_string interface_name)
 348 {
 349         acpi_status status;
 350
 351         /* Parameter validation */
 352
 353         if (!interface_name || (strlen(interface_name) == 0)) {
 354                 return (AE_BAD_PARAMETER);
 355         }
 356
 357         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 358         if (ACPI_FAILURE(status)) {
 359                 return (status);
 360         }
 361
 362         status = acpi_ut_remove_interface(interface_name);
 363
 364         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 365         return (status);
 366 }
 367
 368 ACPI_EXPORT_SYMBOL(acpi_remove_interface)
 369
 370 /*****************************************************************************
 371  *
 372  * FUNCTION:    acpi_install_interface_handler
 373  *
 374  * PARAMETERS:  handler             - The _OSI interface handler to install
 375  *                                    NULL means "remove existing handler"
 376  *
 377  * RETURN:      Status
 378  *
 379  * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
 380  *              invoked during execution of the internal implementation of
 381  *              _OSI. A NULL handler simply removes any existing handler.
 382  *
 383  ****************************************************************************/
 384 acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
 385 {
 386         acpi_status status;
 387
 388         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 389         if (ACPI_FAILURE(status)) {
 390                 return (status);
 391         }
 392
 393         if (handler && acpi_gbl_interface_handler) {
 394                 status = AE_ALREADY_EXISTS;
 395         } else {
 396                 acpi_gbl_interface_handler = handler;
 397         }
 398
 399         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 400         return (status);
 401 }
 402
 403 ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
 404
 405 /*****************************************************************************
 406  *
 407  * FUNCTION:    acpi_update_interfaces
 408  *
 409  * PARAMETERS:  action              - Actions to be performed during the
 410  *                                    update
 411  *
 412  * RETURN:      Status
 413  *
 414  * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
 415  *              string or/and feature group strings.
 416  *
 417  ****************************************************************************/
 418 acpi_status acpi_update_interfaces(u8 action)
 419 {
 420         acpi_status status;
 421
 422         status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 423         if (ACPI_FAILURE(status)) {
 424                 return (status);
 425         }
 426
 427         status = acpi_ut_update_interfaces(action);
 428
 429         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 430         return (status);
 431 }
 432
 433 /*****************************************************************************
 434  *
 435  * FUNCTION:    acpi_check_address_range
 436  *
 437  * PARAMETERS:  space_id            - Address space ID
 438  *              address             - Start address
 439  *              length              - Length
 440  *              warn                - TRUE if warning on overlap desired
 441  *
 442  * RETURN:      Count of the number of conflicts detected.
 443  *
 444  * DESCRIPTION: Check if the input address range overlaps any of the
 445  *              ASL operation region address ranges.
 446  *
 447  ****************************************************************************/
 448
 449 u32
 450 acpi_check_address_range(acpi_adr_space_type space_id,
 451                          acpi_physical_address address,
 452                          acpi_size length, u8 warn)
 453 {
 454         u32 overlaps;
 455         acpi_status status;
 456
 457         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
 458         if (ACPI_FAILURE(status)) {
 459                 return (0);
 460         }
 461
 462         overlaps = acpi_ut_check_address_range(space_id, address,
 463                                                (u32)length, warn);
 464
 465         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 466         return (overlaps);
 467 }
 468
 469 ACPI_EXPORT_SYMBOL(acpi_check_address_range)
 470 #endif                          /* !ACPI_ASL_COMPILER */
 471 /*******************************************************************************
 472  *
 473  * FUNCTION:    acpi_decode_pld_buffer
 474  *
 475  * PARAMETERS:  in_buffer           - Buffer returned by _PLD method
 476  *              length              - Length of the in_buffer
 477  *              return_buffer       - Where the decode buffer is returned
 478  *
 479  * RETURN:      Status and the decoded _PLD buffer. User must deallocate
 480  *              the buffer via ACPI_FREE.
 481  *
 482  * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
 483  *              a local struct that is much more useful to an ACPI driver.
 484  *
 485  ******************************************************************************/
 486 acpi_status
 487 acpi_decode_pld_buffer(u8 *in_buffer,
 488                        acpi_size length, struct acpi_pld_info ** return_buffer)
 489 {
 490         struct acpi_pld_info *pld_info;
 491         u32 *buffer = ACPI_CAST_PTR(u32, in_buffer);
 492         u32 dword;
 493
 494         /* Parameter validation */
 495
 496         if (!in_buffer || !return_buffer
 497             || (length < ACPI_PLD_REV1_BUFFER_SIZE)) {
 498                 return (AE_BAD_PARAMETER);
 499         }
 500
 501         pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info));
 502         if (!pld_info) {
 503                 return (AE_NO_MEMORY);
 504         }
 505
 506         /* First 32-bit DWord */
 507
 508         ACPI_MOVE_32_TO_32(&dword, &buffer[0]);
 509         pld_info->revision = ACPI_PLD_GET_REVISION(&dword);
 510         pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword);
 511         pld_info->red = ACPI_PLD_GET_RED(&dword);
 512         pld_info->green = ACPI_PLD_GET_GREEN(&dword);
 513         pld_info->blue = ACPI_PLD_GET_BLUE(&dword);
 514
 515         /* Second 32-bit DWord */
 516
 517         ACPI_MOVE_32_TO_32(&dword, &buffer[1]);
 518         pld_info->width = ACPI_PLD_GET_WIDTH(&dword);
 519         pld_info->height = ACPI_PLD_GET_HEIGHT(&dword);
 520
 521         /* Third 32-bit DWord */
 522
 523         ACPI_MOVE_32_TO_32(&dword, &buffer[2]);
 524         pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword);
 525         pld_info->dock = ACPI_PLD_GET_DOCK(&dword);
 526         pld_info->lid = ACPI_PLD_GET_LID(&dword);
 527         pld_info->panel = ACPI_PLD_GET_PANEL(&dword);
 528         pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword);
 529         pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword);
 530         pld_info->shape = ACPI_PLD_GET_SHAPE(&dword);
 531         pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword);
 532         pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword);
 533         pld_info->group_position = ACPI_PLD_GET_POSITION(&dword);
 534         pld_info->bay = ACPI_PLD_GET_BAY(&dword);
 535
 536         /* Fourth 32-bit DWord */
 537
 538         ACPI_MOVE_32_TO_32(&dword, &buffer[3]);
 539         pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword);
 540         pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword);
 541         pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword);
 542         pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword);
 543         pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword);
 544         pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword);
 545         pld_info->order = ACPI_PLD_GET_ORDER(&dword);
 546
 547         if (length >= ACPI_PLD_REV2_BUFFER_SIZE) {
 548
 549                 /* Fifth 32-bit DWord (Revision 2 of _PLD) */
 550
 551                 ACPI_MOVE_32_TO_32(&dword, &buffer[4]);
 552                 pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword);
 553                 pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword);
 554         }
 555
 556         *return_buffer = pld_info;
 557         return (AE_OK);
 558 }
 559
 560 ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)