kernel/drivers/acpi/acpica/exdebug.c

   1 /******************************************************************************
   2  *
   3  * Module Name: exdebug - Support for stores to the AML Debug Object
   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 #include <acpi/acpi.h>
  45 #include "accommon.h"
  46 #include "acnamesp.h"
  47 #include "acinterp.h"
  48 #include "acparser.h"
  49
  50 #define _COMPONENT          ACPI_EXECUTER
  51 ACPI_MODULE_NAME("exdebug")
  52
  53 static union acpi_operand_object *acpi_gbl_trace_method_object = NULL;
  54
  55 /* Local prototypes */
  56
  57 #ifdef ACPI_DEBUG_OUTPUT
  58 static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type);
  59 #endif
  60
  61 #ifndef ACPI_NO_ERROR_MESSAGES
  62 /*******************************************************************************
  63  *
  64  * FUNCTION:    acpi_ex_do_debug_object
  65  *
  66  * PARAMETERS:  source_desc         - Object to be output to "Debug Object"
  67  *              level               - Indentation level (used for packages)
  68  *              index               - Current package element, zero if not pkg
  69  *
  70  * RETURN:      None
  71  *
  72  * DESCRIPTION: Handles stores to the AML Debug Object. For example:
  73  *              Store(INT1, Debug)
  74  *
  75  * This function is not compiled if ACPI_NO_ERROR_MESSAGES is set.
  76  *
  77  * This function is only enabled if acpi_gbl_enable_aml_debug_object is set, or
  78  * if ACPI_LV_DEBUG_OBJECT is set in the acpi_dbg_level. Thus, in the normal
  79  * operational case, stores to the debug object are ignored but can be easily
  80  * enabled if necessary.
  81  *
  82  ******************************************************************************/
  83
  84 void
  85 acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
  86                         u32 level, u32 index)
  87 {
  88         u32 i;
  89         u32 timer;
  90         union acpi_operand_object *object_desc;
  91         u32 value;
  92
  93         ACPI_FUNCTION_TRACE_PTR(ex_do_debug_object, source_desc);
  94
  95         /* Output must be enabled via the debug_object global or the dbg_level */
  96
  97         if (!acpi_gbl_enable_aml_debug_object &&
  98             !(acpi_dbg_level & ACPI_LV_DEBUG_OBJECT)) {
  99                 return_VOID;
 100         }
 101
 102         /*
 103          * We will emit the current timer value (in microseconds) with each
 104          * debug output. Only need the lower 26 bits. This allows for 67
 105          * million microseconds or 67 seconds before rollover.
 106          */
 107         timer = ((u32)acpi_os_get_timer() / 10);        /* (100 nanoseconds to microseconds) */
 108         timer &= 0x03FFFFFF;
 109
 110         /*
 111          * Print line header as long as we are not in the middle of an
 112          * object display
 113          */
 114         if (!((level > 0) && index == 0)) {
 115                 acpi_os_printf("[ACPI Debug %.8u] %*s", timer, level, " ");
 116         }
 117
 118         /* Display the index for package output only */
 119
 120         if (index > 0) {
 121                 acpi_os_printf("(%.2u) ", index - 1);
 122         }
 123
 124         if (!source_desc) {
 125                 acpi_os_printf("[Null Object]\n");
 126                 return_VOID;
 127         }
 128
 129         if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) {
 130                 acpi_os_printf("%s ",
 131                                acpi_ut_get_object_type_name(source_desc));
 132
 133                 if (!acpi_ut_valid_internal_object(source_desc)) {
 134                         acpi_os_printf("%p, Invalid Internal Object!\n",
 135                                        source_desc);
 136                         return_VOID;
 137                 }
 138         } else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) ==
 139                    ACPI_DESC_TYPE_NAMED) {
 140                 acpi_os_printf("%s: %p\n",
 141                                acpi_ut_get_type_name(((struct
 142                                                        acpi_namespace_node *)
 143                                                       source_desc)->type),
 144                                source_desc);
 145                 return_VOID;
 146         } else {
 147                 return_VOID;
 148         }
 149
 150         /* source_desc is of type ACPI_DESC_TYPE_OPERAND */
 151
 152         switch (source_desc->common.type) {
 153         case ACPI_TYPE_INTEGER:
 154
 155                 /* Output correct integer width */
 156
 157                 if (acpi_gbl_integer_byte_width == 4) {
 158                         acpi_os_printf("0x%8.8X\n",
 159                                        (u32)source_desc->integer.value);
 160                 } else {
 161                         acpi_os_printf("0x%8.8X%8.8X\n",
 162                                        ACPI_FORMAT_UINT64(source_desc->integer.
 163                                                           value));
 164                 }
 165                 break;
 166
 167         case ACPI_TYPE_BUFFER:
 168
 169                 acpi_os_printf("[0x%.2X]\n", (u32)source_desc->buffer.length);
 170                 acpi_ut_dump_buffer(source_desc->buffer.pointer,
 171                                     (source_desc->buffer.length < 256) ?
 172                                     source_desc->buffer.length : 256,
 173                                     DB_BYTE_DISPLAY, 0);
 174                 break;
 175
 176         case ACPI_TYPE_STRING:
 177
 178                 acpi_os_printf("[0x%.2X] \"%s\"\n",
 179                                source_desc->string.length,
 180                                source_desc->string.pointer);
 181                 break;
 182
 183         case ACPI_TYPE_PACKAGE:
 184
 185                 acpi_os_printf("[Contains 0x%.2X Elements]\n",
 186                                source_desc->package.count);
 187
 188                 /* Output the entire contents of the package */
 189
 190                 for (i = 0; i < source_desc->package.count; i++) {
 191                         acpi_ex_do_debug_object(source_desc->package.
 192                                                 elements[i], level + 4, i + 1);
 193                 }
 194                 break;
 195
 196         case ACPI_TYPE_LOCAL_REFERENCE:
 197
 198                 acpi_os_printf("[%s] ",
 199                                acpi_ut_get_reference_name(source_desc));
 200
 201                 /* Decode the reference */
 202
 203                 switch (source_desc->reference.class) {
 204                 case ACPI_REFCLASS_INDEX:
 205
 206                         acpi_os_printf("0x%X\n", source_desc->reference.value);
 207                         break;
 208
 209                 case ACPI_REFCLASS_TABLE:
 210
 211                         /* Case for ddb_handle */
 212
 213                         acpi_os_printf("Table Index 0x%X\n",
 214                                        source_desc->reference.value);
 215                         return_VOID;
 216
 217                 default:
 218
 219                         break;
 220                 }
 221
 222                 acpi_os_printf(" ");
 223
 224                 /* Check for valid node first, then valid object */
 225
 226                 if (source_desc->reference.node) {
 227                         if (ACPI_GET_DESCRIPTOR_TYPE
 228                             (source_desc->reference.node) !=
 229                             ACPI_DESC_TYPE_NAMED) {
 230                                 acpi_os_printf
 231                                     (" %p - Not a valid namespace node\n",
 232                                      source_desc->reference.node);
 233                         } else {
 234                                 acpi_os_printf("Node %p [%4.4s] ",
 235                                                source_desc->reference.node,
 236                                                (source_desc->reference.node)->
 237                                                name.ascii);
 238
 239                                 switch ((source_desc->reference.node)->type) {
 240
 241                                         /* These types have no attached object */
 242
 243                                 case ACPI_TYPE_DEVICE:
 244                                         acpi_os_printf("Device\n");
 245                                         break;
 246
 247                                 case ACPI_TYPE_THERMAL:
 248                                         acpi_os_printf("Thermal Zone\n");
 249                                         break;
 250
 251                                 default:
 252
 253                                         acpi_ex_do_debug_object((source_desc->
 254                                                                  reference.
 255                                                                  node)->object,
 256                                                                 level + 4, 0);
 257                                         break;
 258                                 }
 259                         }
 260                 } else if (source_desc->reference.object) {
 261                         if (ACPI_GET_DESCRIPTOR_TYPE
 262                             (source_desc->reference.object) ==
 263                             ACPI_DESC_TYPE_NAMED) {
 264                                 acpi_ex_do_debug_object(((struct
 265                                                           acpi_namespace_node *)
 266                                                          source_desc->reference.
 267                                                          object)->object,
 268                                                         level + 4, 0);
 269                         } else {
 270                                 object_desc = source_desc->reference.object;
 271                                 value = source_desc->reference.value;
 272
 273                                 switch (object_desc->common.type) {
 274                                 case ACPI_TYPE_BUFFER:
 275
 276                                         acpi_os_printf("Buffer[%u] = 0x%2.2X\n",
 277                                                        value,
 278                                                        *source_desc->reference.
 279                                                        index_pointer);
 280                                         break;
 281
 282                                 case ACPI_TYPE_STRING:
 283
 284                                         acpi_os_printf
 285                                             ("String[%u] = \"%c\" (0x%2.2X)\n",
 286                                              value,
 287                                              *source_desc->reference.
 288                                              index_pointer,
 289                                              *source_desc->reference.
 290                                              index_pointer);
 291                                         break;
 292
 293                                 case ACPI_TYPE_PACKAGE:
 294
 295                                         acpi_os_printf("Package[%u] = ", value);
 296                                         acpi_ex_do_debug_object(*source_desc->
 297                                                                 reference.where,
 298                                                                 level + 4, 0);
 299                                         break;
 300
 301                                 default:
 302
 303                                         acpi_os_printf
 304                                             ("Unknown Reference object type %X\n",
 305                                              object_desc->common.type);
 306                                         break;
 307                                 }
 308                         }
 309                 }
 310                 break;
 311
 312         default:
 313
 314                 acpi_os_printf("%p\n", source_desc);
 315                 break;
 316         }
 317
 318         ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n"));
 319         return_VOID;
 320 }
 321 #endif
 322
 323 /*******************************************************************************
 324  *
 325  * FUNCTION:    acpi_ex_interpreter_trace_enabled
 326  *
 327  * PARAMETERS:  name                - Whether method name should be matched,
 328  *                                    this should be checked before starting
 329  *                                    the tracer
 330  *
 331  * RETURN:      TRUE if interpreter trace is enabled.
 332  *
 333  * DESCRIPTION: Check whether interpreter trace is enabled
 334  *
 335  ******************************************************************************/
 336
 337 static u8 acpi_ex_interpreter_trace_enabled(char *name)
 338 {
 339
 340         /* Check if tracing is enabled */
 341
 342         if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) {
 343                 return (FALSE);
 344         }
 345
 346         /*
 347          * Check if tracing is filtered:
 348          *
 349          * 1. If the tracer is started, acpi_gbl_trace_method_object should have
 350          *    been filled by the trace starter
 351          * 2. If the tracer is not started, acpi_gbl_trace_method_name should be
 352          *    matched if it is specified
 353          * 3. If the tracer is oneshot style, acpi_gbl_trace_method_name should
 354          *    not be cleared by the trace stopper during the first match
 355          */
 356         if (acpi_gbl_trace_method_object) {
 357                 return (TRUE);
 358         }
 359         if (name &&
 360             (acpi_gbl_trace_method_name &&
 361              strcmp(acpi_gbl_trace_method_name, name))) {
 362                 return (FALSE);
 363         }
 364         if ((acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) &&
 365             !acpi_gbl_trace_method_name) {
 366                 return (FALSE);
 367         }
 368
 369         return (TRUE);
 370 }
 371
 372 /*******************************************************************************
 373  *
 374  * FUNCTION:    acpi_ex_get_trace_event_name
 375  *
 376  * PARAMETERS:  type            - Trace event type
 377  *
 378  * RETURN:      Trace event name.
 379  *
 380  * DESCRIPTION: Used to obtain the full trace event name.
 381  *
 382  ******************************************************************************/
 383
 384 #ifdef ACPI_DEBUG_OUTPUT
 385
 386 static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type)
 387 {
 388         switch (type) {
 389         case ACPI_TRACE_AML_METHOD:
 390
 391                 return "Method";
 392
 393         case ACPI_TRACE_AML_OPCODE:
 394
 395                 return "Opcode";
 396
 397         case ACPI_TRACE_AML_REGION:
 398
 399                 return "Region";
 400
 401         default:
 402
 403                 return "";
 404         }
 405 }
 406
 407 #endif
 408
 409 /*******************************************************************************
 410  *
 411  * FUNCTION:    acpi_ex_trace_point
 412  *
 413  * PARAMETERS:  type                - Trace event type
 414  *              begin               - TRUE if before execution
 415  *              aml                 - Executed AML address
 416  *              pathname            - Object path
 417  *
 418  * RETURN:      None
 419  *
 420  * DESCRIPTION: Internal interpreter execution trace.
 421  *
 422  ******************************************************************************/
 423
 424 void
 425 acpi_ex_trace_point(acpi_trace_event_type type,
 426                     u8 begin, u8 *aml, char *pathname)
 427 {
 428
 429         ACPI_FUNCTION_NAME(ex_trace_point);
 430
 431         if (pathname) {
 432                 ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
 433                                   "%s %s [0x%p:%s] execution.\n",
 434                                   acpi_ex_get_trace_event_name(type),
 435                                   begin ? "Begin" : "End", aml, pathname));
 436         } else {
 437                 ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
 438                                   "%s %s [0x%p] execution.\n",
 439                                   acpi_ex_get_trace_event_name(type),
 440                                   begin ? "Begin" : "End", aml));
 441         }
 442 }
 443
 444 /*******************************************************************************
 445  *
 446  * FUNCTION:    acpi_ex_start_trace_method
 447  *
 448  * PARAMETERS:  method_node         - Node of the method
 449  *              obj_desc            - The method object
 450  *              walk_state          - current state, NULL if not yet executing
 451  *                                    a method.
 452  *
 453  * RETURN:      None
 454  *
 455  * DESCRIPTION: Start control method execution trace
 456  *
 457  ******************************************************************************/
 458
 459 void
 460 acpi_ex_start_trace_method(struct acpi_namespace_node *method_node,
 461                            union acpi_operand_object *obj_desc,
 462                            struct acpi_walk_state *walk_state)
 463 {
 464         acpi_status status;
 465         char *pathname = NULL;
 466         u8 enabled = FALSE;
 467
 468         ACPI_FUNCTION_NAME(ex_start_trace_method);
 469
 470         if (method_node) {
 471                 pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
 472         }
 473
 474         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
 475         if (ACPI_FAILURE(status)) {
 476                 goto exit;
 477         }
 478
 479         enabled = acpi_ex_interpreter_trace_enabled(pathname);
 480         if (enabled && !acpi_gbl_trace_method_object) {
 481                 acpi_gbl_trace_method_object = obj_desc;
 482                 acpi_gbl_original_dbg_level = acpi_dbg_level;
 483                 acpi_gbl_original_dbg_layer = acpi_dbg_layer;
 484                 acpi_dbg_level = ACPI_TRACE_LEVEL_ALL;
 485                 acpi_dbg_layer = ACPI_TRACE_LAYER_ALL;
 486
 487                 if (acpi_gbl_trace_dbg_level) {
 488                         acpi_dbg_level = acpi_gbl_trace_dbg_level;
 489                 }
 490                 if (acpi_gbl_trace_dbg_layer) {
 491                         acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
 492                 }
 493         }
 494         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 495
 496 exit:
 497         if (enabled) {
 498                 ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, TRUE,
 499                                  obj_desc ? obj_desc->method.aml_start : NULL,
 500                                  pathname);
 501         }
 502         if (pathname) {
 503                 ACPI_FREE(pathname);
 504         }
 505 }
 506
 507 /*******************************************************************************
 508  *
 509  * FUNCTION:    acpi_ex_stop_trace_method
 510  *
 511  * PARAMETERS:  method_node         - Node of the method
 512  *              obj_desc            - The method object
 513  *              walk_state          - current state, NULL if not yet executing
 514  *                                    a method.
 515  *
 516  * RETURN:      None
 517  *
 518  * DESCRIPTION: Stop control method execution trace
 519  *
 520  ******************************************************************************/
 521
 522 void
 523 acpi_ex_stop_trace_method(struct acpi_namespace_node *method_node,
 524                           union acpi_operand_object *obj_desc,
 525                           struct acpi_walk_state *walk_state)
 526 {
 527         acpi_status status;
 528         char *pathname = NULL;
 529         u8 enabled;
 530
 531         ACPI_FUNCTION_NAME(ex_stop_trace_method);
 532
 533         if (method_node) {
 534                 pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
 535         }
 536
 537         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
 538         if (ACPI_FAILURE(status)) {
 539                 goto exit_path;
 540         }
 541
 542         enabled = acpi_ex_interpreter_trace_enabled(NULL);
 543
 544         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 545
 546         if (enabled) {
 547                 ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, FALSE,
 548                                  obj_desc ? obj_desc->method.aml_start : NULL,
 549                                  pathname);
 550         }
 551
 552         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
 553         if (ACPI_FAILURE(status)) {
 554                 goto exit_path;
 555         }
 556
 557         /* Check whether the tracer should be stopped */
 558
 559         if (acpi_gbl_trace_method_object == obj_desc) {
 560
 561                 /* Disable further tracing if type is one-shot */
 562
 563                 if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) {
 564                         acpi_gbl_trace_method_name = NULL;
 565                 }
 566
 567                 acpi_dbg_level = acpi_gbl_original_dbg_level;
 568                 acpi_dbg_layer = acpi_gbl_original_dbg_layer;
 569                 acpi_gbl_trace_method_object = NULL;
 570         }
 571
 572         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 573
 574 exit_path:
 575         if (pathname) {
 576                 ACPI_FREE(pathname);
 577         }
 578 }
 579
 580 /*******************************************************************************
 581  *
 582  * FUNCTION:    acpi_ex_start_trace_opcode
 583  *
 584  * PARAMETERS:  op                  - The parser opcode object
 585  *              walk_state          - current state, NULL if not yet executing
 586  *                                    a method.
 587  *
 588  * RETURN:      None
 589  *
 590  * DESCRIPTION: Start opcode execution trace
 591  *
 592  ******************************************************************************/
 593
 594 void
 595 acpi_ex_start_trace_opcode(union acpi_parse_object *op,
 596                            struct acpi_walk_state *walk_state)
 597 {
 598
 599         ACPI_FUNCTION_NAME(ex_start_trace_opcode);
 600
 601         if (acpi_ex_interpreter_trace_enabled(NULL) &&
 602             (acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
 603                 ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, TRUE,
 604                                  op->common.aml, op->common.aml_op_name);
 605         }
 606 }
 607
 608 /*******************************************************************************
 609  *
 610  * FUNCTION:    acpi_ex_stop_trace_opcode
 611  *
 612  * PARAMETERS:  op                  - The parser opcode object
 613  *              walk_state          - current state, NULL if not yet executing
 614  *                                    a method.
 615  *
 616  * RETURN:      None
 617  *
 618  * DESCRIPTION: Stop opcode execution trace
 619  *
 620  ******************************************************************************/
 621
 622 void
 623 acpi_ex_stop_trace_opcode(union acpi_parse_object *op,
 624                           struct acpi_walk_state *walk_state)
 625 {
 626
 627         ACPI_FUNCTION_NAME(ex_stop_trace_opcode);
 628
 629         if (acpi_ex_interpreter_trace_enabled(NULL) &&
 630             (acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
 631                 ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, FALSE,
 632                                  op->common.aml, op->common.aml_op_name);
 633         }
 634 }