drivers/acpi/utilities/utdebug.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utdebug - Debug print routines
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, R. Byron Moore
   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
  46 #define _COMPONENT          ACPI_UTILITIES
  47 ACPI_MODULE_NAME("utdebug")
  48
  49 #ifdef ACPI_DEBUG_OUTPUT
  50 static acpi_thread_id acpi_gbl_prev_thread_id;
  51 static char *acpi_gbl_fn_entry_str = "----Entry";
  52 static char *acpi_gbl_fn_exit_str = "----Exit-";
  53
  54 /* Local prototypes */
  55
  56 static const char *acpi_ut_trim_function_name(const char *function_name);
  57
  58 /*******************************************************************************
  59  *
  60  * FUNCTION:    acpi_ut_init_stack_ptr_trace
  61  *
  62  * PARAMETERS:  None
  63  *
  64  * RETURN:      None
  65  *
  66  * DESCRIPTION: Save the current CPU stack pointer at subsystem startup
  67  *
  68  ******************************************************************************/
  69
  70 void acpi_ut_init_stack_ptr_trace(void)
  71 {
  72         u32 current_sp;
  73
  74         acpi_gbl_entry_stack_pointer = ACPI_PTR_DIFF(&current_sp, NULL);
  75 }
  76
  77 /*******************************************************************************
  78  *
  79  * FUNCTION:    acpi_ut_track_stack_ptr
  80  *
  81  * PARAMETERS:  None
  82  *
  83  * RETURN:      None
  84  *
  85  * DESCRIPTION: Save the current CPU stack pointer
  86  *
  87  ******************************************************************************/
  88
  89 void acpi_ut_track_stack_ptr(void)
  90 {
  91         acpi_size current_sp;
  92
  93         current_sp = ACPI_PTR_DIFF(&current_sp, NULL);
  94
  95         if (current_sp < acpi_gbl_lowest_stack_pointer) {
  96                 acpi_gbl_lowest_stack_pointer = current_sp;
  97         }
  98
  99         if (acpi_gbl_nesting_level > acpi_gbl_deepest_nesting) {
 100                 acpi_gbl_deepest_nesting = acpi_gbl_nesting_level;
 101         }
 102 }
 103
 104 /*******************************************************************************
 105  *
 106  * FUNCTION:    acpi_ut_trim_function_name
 107  *
 108  * PARAMETERS:  function_name       - Ascii string containing a procedure name
 109  *
 110  * RETURN:      Updated pointer to the function name
 111  *
 112  * DESCRIPTION: Remove the "Acpi" prefix from the function name, if present.
 113  *              This allows compiler macros such as __FUNCTION__ to be used
 114  *              with no change to the debug output.
 115  *
 116  ******************************************************************************/
 117
 118 static const char *acpi_ut_trim_function_name(const char *function_name)
 119 {
 120
 121         /* All Function names are longer than 4 chars, check is safe */
 122
 123         if (*(ACPI_CAST_PTR(u32, function_name)) == ACPI_PREFIX_MIXED) {
 124
 125                 /* This is the case where the original source has not been modified */
 126
 127                 return (function_name + 4);
 128         }
 129
 130         if (*(ACPI_CAST_PTR(u32, function_name)) == ACPI_PREFIX_LOWER) {
 131
 132                 /* This is the case where the source has been 'linuxized' */
 133
 134                 return (function_name + 5);
 135         }
 136
 137         return (function_name);
 138 }
 139
 140 /*******************************************************************************
 141  *
 142  * FUNCTION:    acpi_ut_debug_print
 143  *
 144  * PARAMETERS:  requested_debug_level - Requested debug print level
 145  *              line_number         - Caller's line number (for error output)
 146  *              function_name       - Caller's procedure name
 147  *              module_name         - Caller's module name
 148  *              component_id        - Caller's component ID
 149  *              Format              - Printf format field
 150  *              ...                 - Optional printf arguments
 151  *
 152  * RETURN:      None
 153  *
 154  * DESCRIPTION: Print error message with prefix consisting of the module name,
 155  *              line number, and component ID.
 156  *
 157  ******************************************************************************/
 158
 159 void ACPI_INTERNAL_VAR_XFACE
 160 acpi_ut_debug_print(u32 requested_debug_level,
 161                     u32 line_number,
 162                     const char *function_name,
 163                     char *module_name, u32 component_id, char *format, ...)
 164 {
 165         acpi_thread_id thread_id;
 166         va_list args;
 167
 168         /*
 169          * Stay silent if the debug level or component ID is disabled
 170          */
 171         if (!(requested_debug_level & acpi_dbg_level) ||
 172             !(component_id & acpi_dbg_layer)) {
 173                 return;
 174         }
 175
 176         /*
 177          * Thread tracking and context switch notification
 178          */
 179         thread_id = acpi_os_get_thread_id();
 180         if (thread_id != acpi_gbl_prev_thread_id) {
 181                 if (ACPI_LV_THREADS & acpi_dbg_level) {
 182                         acpi_os_printf
 183                             ("\n**** Context Switch from TID %lX to TID %lX ****\n\n",
 184                              (unsigned long) acpi_gbl_prev_thread_id,
 185                              (unsigned long) thread_id);
 186                 }
 187
 188                 acpi_gbl_prev_thread_id = thread_id;
 189         }
 190
 191         /*
 192          * Display the module name, current line number, thread ID (if requested),
 193          * current procedure nesting level, and the current procedure name
 194          */
 195         acpi_os_printf("%8s-%04ld ", module_name, line_number);
 196
 197         if (ACPI_LV_THREADS & acpi_dbg_level) {
 198                 acpi_os_printf("[%04lX] ", thread_id);
 199         }
 200
 201         acpi_os_printf("[%02ld] %-22.22s: ",
 202                        acpi_gbl_nesting_level,
 203                        acpi_ut_trim_function_name(function_name));
 204
 205         va_start(args, format);
 206         acpi_os_vprintf(format, args);
 207 }
 208
 209 ACPI_EXPORT_SYMBOL(acpi_ut_debug_print)
 210
 211 /*******************************************************************************
 212  *
 213  * FUNCTION:    acpi_ut_debug_print_raw
 214  *
 215  * PARAMETERS:  requested_debug_level - Requested debug print level
 216  *              line_number         - Caller's line number
 217  *              function_name       - Caller's procedure name
 218  *              module_name         - Caller's module name
 219  *              component_id        - Caller's component ID
 220  *              Format              - Printf format field
 221  *              ...                 - Optional printf arguments
 222  *
 223  * RETURN:      None
 224  *
 225  * DESCRIPTION: Print message with no headers.  Has same interface as
 226  *              debug_print so that the same macros can be used.
 227  *
 228  ******************************************************************************/
 229 void ACPI_INTERNAL_VAR_XFACE
 230 acpi_ut_debug_print_raw(u32 requested_debug_level,
 231                         u32 line_number,
 232                         const char *function_name,
 233                         char *module_name, u32 component_id, char *format, ...)
 234 {
 235         va_list args;
 236
 237         if (!(requested_debug_level & acpi_dbg_level) ||
 238             !(component_id & acpi_dbg_layer)) {
 239                 return;
 240         }
 241
 242         va_start(args, format);
 243         acpi_os_vprintf(format, args);
 244 }
 245
 246 ACPI_EXPORT_SYMBOL(acpi_ut_debug_print_raw)
 247
 248 /*******************************************************************************
 249  *
 250  * FUNCTION:    acpi_ut_trace
 251  *
 252  * PARAMETERS:  line_number         - Caller's line number
 253  *              function_name       - Caller's procedure name
 254  *              module_name         - Caller's module name
 255  *              component_id        - Caller's component ID
 256  *
 257  * RETURN:      None
 258  *
 259  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 260  *              set in debug_level
 261  *
 262  ******************************************************************************/
 263 void
 264 acpi_ut_trace(u32 line_number,
 265               const char *function_name, char *module_name, u32 component_id)
 266 {
 267
 268         acpi_gbl_nesting_level++;
 269         acpi_ut_track_stack_ptr();
 270
 271         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 272                             line_number, function_name, module_name,
 273                             component_id, "%s\n", acpi_gbl_fn_entry_str);
 274 }
 275
 276 ACPI_EXPORT_SYMBOL(acpi_ut_trace)
 277
 278 /*******************************************************************************
 279  *
 280  * FUNCTION:    acpi_ut_trace_ptr
 281  *
 282  * PARAMETERS:  line_number         - Caller's line number
 283  *              function_name       - Caller's procedure name
 284  *              module_name         - Caller's module name
 285  *              component_id        - Caller's component ID
 286  *              Pointer             - Pointer to display
 287  *
 288  * RETURN:      None
 289  *
 290  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 291  *              set in debug_level
 292  *
 293  ******************************************************************************/
 294 void
 295 acpi_ut_trace_ptr(u32 line_number,
 296                   const char *function_name,
 297                   char *module_name, u32 component_id, void *pointer)
 298 {
 299         acpi_gbl_nesting_level++;
 300         acpi_ut_track_stack_ptr();
 301
 302         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 303                             line_number, function_name, module_name,
 304                             component_id, "%s %p\n", acpi_gbl_fn_entry_str,
 305                             pointer);
 306 }
 307
 308 /*******************************************************************************
 309  *
 310  * FUNCTION:    acpi_ut_trace_str
 311  *
 312  * PARAMETERS:  line_number         - Caller's line number
 313  *              function_name       - Caller's procedure name
 314  *              module_name         - Caller's module name
 315  *              component_id        - Caller's component ID
 316  *              String              - Additional string to display
 317  *
 318  * RETURN:      None
 319  *
 320  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 321  *              set in debug_level
 322  *
 323  ******************************************************************************/
 324
 325 void
 326 acpi_ut_trace_str(u32 line_number,
 327                   const char *function_name,
 328                   char *module_name, u32 component_id, char *string)
 329 {
 330
 331         acpi_gbl_nesting_level++;
 332         acpi_ut_track_stack_ptr();
 333
 334         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 335                             line_number, function_name, module_name,
 336                             component_id, "%s %s\n", acpi_gbl_fn_entry_str,
 337                             string);
 338 }
 339
 340 /*******************************************************************************
 341  *
 342  * FUNCTION:    acpi_ut_trace_u32
 343  *
 344  * PARAMETERS:  line_number         - Caller's line number
 345  *              function_name       - Caller's procedure name
 346  *              module_name         - Caller's module name
 347  *              component_id        - Caller's component ID
 348  *              Integer             - Integer to display
 349  *
 350  * RETURN:      None
 351  *
 352  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 353  *              set in debug_level
 354  *
 355  ******************************************************************************/
 356
 357 void
 358 acpi_ut_trace_u32(u32 line_number,
 359                   const char *function_name,
 360                   char *module_name, u32 component_id, u32 integer)
 361 {
 362
 363         acpi_gbl_nesting_level++;
 364         acpi_ut_track_stack_ptr();
 365
 366         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 367                             line_number, function_name, module_name,
 368                             component_id, "%s %08X\n", acpi_gbl_fn_entry_str,
 369                             integer);
 370 }
 371
 372 /*******************************************************************************
 373  *
 374  * FUNCTION:    acpi_ut_exit
 375  *
 376  * PARAMETERS:  line_number         - Caller's line number
 377  *              function_name       - Caller's procedure name
 378  *              module_name         - Caller's module name
 379  *              component_id        - Caller's component ID
 380  *
 381  * RETURN:      None
 382  *
 383  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 384  *              set in debug_level
 385  *
 386  ******************************************************************************/
 387
 388 void
 389 acpi_ut_exit(u32 line_number,
 390              const char *function_name, char *module_name, u32 component_id)
 391 {
 392
 393         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 394                             line_number, function_name, module_name,
 395                             component_id, "%s\n", acpi_gbl_fn_exit_str);
 396
 397         acpi_gbl_nesting_level--;
 398 }
 399
 400 ACPI_EXPORT_SYMBOL(acpi_ut_exit)
 401
 402 /*******************************************************************************
 403  *
 404  * FUNCTION:    acpi_ut_status_exit
 405  *
 406  * PARAMETERS:  line_number         - Caller's line number
 407  *              function_name       - Caller's procedure name
 408  *              module_name         - Caller's module name
 409  *              component_id        - Caller's component ID
 410  *              Status              - Exit status code
 411  *
 412  * RETURN:      None
 413  *
 414  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 415  *              set in debug_level. Prints exit status also.
 416  *
 417  ******************************************************************************/
 418 void
 419 acpi_ut_status_exit(u32 line_number,
 420                     const char *function_name,
 421                     char *module_name, u32 component_id, acpi_status status)
 422 {
 423
 424         if (ACPI_SUCCESS(status)) {
 425                 acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 426                                     line_number, function_name, module_name,
 427                                     component_id, "%s %s\n",
 428                                     acpi_gbl_fn_exit_str,
 429                                     acpi_format_exception(status));
 430         } else {
 431                 acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 432                                     line_number, function_name, module_name,
 433                                     component_id, "%s ****Exception****: %s\n",
 434                                     acpi_gbl_fn_exit_str,
 435                                     acpi_format_exception(status));
 436         }
 437
 438         acpi_gbl_nesting_level--;
 439 }
 440
 441 ACPI_EXPORT_SYMBOL(acpi_ut_status_exit)
 442
 443 /*******************************************************************************
 444  *
 445  * FUNCTION:    acpi_ut_value_exit
 446  *
 447  * PARAMETERS:  line_number         - Caller's line number
 448  *              function_name       - Caller's procedure name
 449  *              module_name         - Caller's module name
 450  *              component_id        - Caller's component ID
 451  *              Value               - Value to be printed with exit msg
 452  *
 453  * RETURN:      None
 454  *
 455  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 456  *              set in debug_level. Prints exit value also.
 457  *
 458  ******************************************************************************/
 459 void
 460 acpi_ut_value_exit(u32 line_number,
 461                    const char *function_name,
 462                    char *module_name, u32 component_id, acpi_integer value)
 463 {
 464
 465         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 466                             line_number, function_name, module_name,
 467                             component_id, "%s %8.8X%8.8X\n",
 468                             acpi_gbl_fn_exit_str, ACPI_FORMAT_UINT64(value));
 469
 470         acpi_gbl_nesting_level--;
 471 }
 472
 473 ACPI_EXPORT_SYMBOL(acpi_ut_value_exit)
 474
 475 /*******************************************************************************
 476  *
 477  * FUNCTION:    acpi_ut_ptr_exit
 478  *
 479  * PARAMETERS:  line_number         - Caller's line number
 480  *              function_name       - Caller's procedure name
 481  *              module_name         - Caller's module name
 482  *              component_id        - Caller's component ID
 483  *              Ptr                 - Pointer to display
 484  *
 485  * RETURN:      None
 486  *
 487  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 488  *              set in debug_level. Prints exit value also.
 489  *
 490  ******************************************************************************/
 491 void
 492 acpi_ut_ptr_exit(u32 line_number,
 493                  const char *function_name,
 494                  char *module_name, u32 component_id, u8 * ptr)
 495 {
 496
 497         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 498                             line_number, function_name, module_name,
 499                             component_id, "%s %p\n", acpi_gbl_fn_exit_str, ptr);
 500
 501         acpi_gbl_nesting_level--;
 502 }
 503
 504 #endif
 505
 506 /*******************************************************************************
 507  *
 508  * FUNCTION:    acpi_ut_dump_buffer
 509  *
 510  * PARAMETERS:  Buffer              - Buffer to dump
 511  *              Count               - Amount to dump, in bytes
 512  *              Display             - BYTE, WORD, DWORD, or QWORD display
 513  *              component_iD        - Caller's component ID
 514  *
 515  * RETURN:      None
 516  *
 517  * DESCRIPTION: Generic dump buffer in both hex and ascii.
 518  *
 519  ******************************************************************************/
 520
 521 void acpi_ut_dump_buffer2(u8 * buffer, u32 count, u32 display)
 522 {
 523         acpi_native_uint i = 0;
 524         acpi_native_uint j;
 525         u32 temp32;
 526         u8 buf_char;
 527
 528         if ((count < 4) || (count & 0x01)) {
 529                 display = DB_BYTE_DISPLAY;
 530         }
 531
 532         /* Nasty little dump buffer routine! */
 533
 534         while (i < count) {
 535
 536                 /* Print current offset */
 537
 538                 acpi_os_printf("%6.4X: ", (u32) i);
 539
 540                 /* Print 16 hex chars */
 541
 542                 for (j = 0; j < 16;) {
 543                         if (i + j >= count) {
 544
 545                                 /* Dump fill spaces */
 546
 547                                 acpi_os_printf("%*s", ((display * 2) + 1), " ");
 548                                 j += (acpi_native_uint) display;
 549                                 continue;
 550                         }
 551
 552                         switch (display) {
 553                         case DB_BYTE_DISPLAY:
 554                         default:        /* Default is BYTE display */
 555
 556                                 acpi_os_printf("%02X ", buffer[i + j]);
 557                                 break;
 558
 559                         case DB_WORD_DISPLAY:
 560
 561                                 ACPI_MOVE_16_TO_32(&temp32, &buffer[i + j]);
 562                                 acpi_os_printf("%04X ", temp32);
 563                                 break;
 564
 565                         case DB_DWORD_DISPLAY:
 566
 567                                 ACPI_MOVE_32_TO_32(&temp32, &buffer[i + j]);
 568                                 acpi_os_printf("%08X ", temp32);
 569                                 break;
 570
 571                         case DB_QWORD_DISPLAY:
 572
 573                                 ACPI_MOVE_32_TO_32(&temp32, &buffer[i + j]);
 574                                 acpi_os_printf("%08X", temp32);
 575
 576                                 ACPI_MOVE_32_TO_32(&temp32, &buffer[i + j + 4]);
 577                                 acpi_os_printf("%08X ", temp32);
 578                                 break;
 579                         }
 580
 581                         j += (acpi_native_uint) display;
 582                 }
 583
 584                 /*
 585                  * Print the ASCII equivalent characters but watch out for the bad
 586                  * unprintable ones (printable chars are 0x20 through 0x7E)
 587                  */
 588                 acpi_os_printf(" ");
 589                 for (j = 0; j < 16; j++) {
 590                         if (i + j >= count) {
 591                                 acpi_os_printf("\n");
 592                                 return;
 593                         }
 594
 595                         buf_char = buffer[i + j];
 596                         if (ACPI_IS_PRINT(buf_char)) {
 597                                 acpi_os_printf("%c", buf_char);
 598                         } else {
 599                                 acpi_os_printf(".");
 600                         }
 601                 }
 602
 603                 /* Done with that line. */
 604
 605                 acpi_os_printf("\n");
 606                 i += 16;
 607         }
 608
 609         return;
 610 }
 611
 612 /*******************************************************************************
 613  *
 614  * FUNCTION:    acpi_ut_dump_buffer
 615  *
 616  * PARAMETERS:  Buffer              - Buffer to dump
 617  *              Count               - Amount to dump, in bytes
 618  *              Display             - BYTE, WORD, DWORD, or QWORD display
 619  *              component_iD        - Caller's component ID
 620  *
 621  * RETURN:      None
 622  *
 623  * DESCRIPTION: Generic dump buffer in both hex and ascii.
 624  *
 625  ******************************************************************************/
 626
 627 void acpi_ut_dump_buffer(u8 * buffer, u32 count, u32 display, u32 component_id)
 628 {
 629
 630         /* Only dump the buffer if tracing is enabled */
 631
 632         if (!((ACPI_LV_TABLES & acpi_dbg_level) &&
 633               (component_id & acpi_dbg_layer))) {
 634                 return;
 635         }
 636
 637         acpi_ut_dump_buffer2(buffer, count, display);
 638 }