LXR linux/drivers/acpi/acpica/utxface.c

   1/******************************************************************************
   2 *
   3 * Module Name: utxface - External interfaces, miscellaneous utility functions
   4 *
   5 *****************************************************************************/
   6
   7/*
   8 * Copyright (C) 2000 - 2017, 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
  51ACPI_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 ******************************************************************************/
  64acpi_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
  84ACPI_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 ******************************************************************************/
 101acpi_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
 111ACPI_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 ******************************************************************************/
 130acpi_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
 184ACPI_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 ******************************************************************************/
 197acpi_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
 221ACPI_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 ****************************************************************************/
 237acpi_status
 238acpi_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
 253ACPI_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 ****************************************************************************/
 267acpi_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
 279ACPI_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 ****************************************************************************/
 292acpi_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
 332ACPI_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 ****************************************************************************/
 345acpi_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
 366ACPI_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 ****************************************************************************/
 382acpi_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
 401ACPI_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 ****************************************************************************/
 416acpi_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
 447u32
 448acpi_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
 467ACPI_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 ******************************************************************************/
 484acpi_status
 485acpi_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
 558ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)
 559