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 <linux/module.h>
  45
  46 #include <acpi/acpi.h>
  47
  48 #define _COMPONENT          ACPI_UTILITIES
  49 ACPI_MODULE_NAME("utdebug")
  50
  51 #ifdef ACPI_DEBUG_OUTPUT
  52 static u32 acpi_gbl_prev_thread_id = 0xFFFFFFFF;
  53 static char *acpi_gbl_fn_entry_str = "----Entry";
  54 static char *acpi_gbl_fn_exit_str = "----Exit-";
  55
  56 /* Local prototypes */
  57
  58 static const char *acpi_ut_trim_function_name(const char *function_name);
  59
  60 /*******************************************************************************
  61  *
  62  * FUNCTION:    acpi_ut_init_stack_ptr_trace
  63  *
  64  * PARAMETERS:  None
  65  *
  66  * RETURN:      None
  67  *
  68  * DESCRIPTION: Save the current CPU stack pointer at subsystem startup
  69  *
  70  ******************************************************************************/
  71
  72 void acpi_ut_init_stack_ptr_trace(void)
  73 {
  74         u32 current_sp;
  75
  76         acpi_gbl_entry_stack_pointer = ACPI_PTR_DIFF(&current_sp, NULL);
  77 }
  78
  79 /*******************************************************************************
  80  *
  81  * FUNCTION:    acpi_ut_track_stack_ptr
  82  *
  83  * PARAMETERS:  None
  84  *
  85  * RETURN:      None
  86  *
  87  * DESCRIPTION: Save the current CPU stack pointer
  88  *
  89  ******************************************************************************/
  90
  91 void acpi_ut_track_stack_ptr(void)
  92 {
  93         acpi_size current_sp;
  94
  95         current_sp = ACPI_PTR_DIFF(&current_sp, NULL);
  96
  97         if (current_sp < acpi_gbl_lowest_stack_pointer) {
  98                 acpi_gbl_lowest_stack_pointer = current_sp;
  99         }
 100
 101         if (acpi_gbl_nesting_level > acpi_gbl_deepest_nesting) {
 102                 acpi_gbl_deepest_nesting = acpi_gbl_nesting_level;
 103         }
 104 }
 105
 106 /*******************************************************************************
 107  *
 108  * FUNCTION:    acpi_ut_trim_function_name
 109  *
 110  * PARAMETERS:  function_name       - Ascii string containing a procedure name
 111  *
 112  * RETURN:      Updated pointer to the function name
 113  *
 114  * DESCRIPTION: Remove the "Acpi" prefix from the function name, if present.
 115  *              This allows compiler macros such as __FUNCTION__ to be used
 116  *              with no change to the debug output.
 117  *
 118  ******************************************************************************/
 119
 120 static const char *acpi_ut_trim_function_name(const char *function_name)
 121 {
 122
 123         /* All Function names are longer than 4 chars, check is safe */
 124
 125         if (*(ACPI_CAST_PTR(u32, function_name)) == ACPI_PREFIX_MIXED) {
 126                 /* This is the case where the original source has not been modified */
 127
 128                 return (function_name + 4);
 129         }
 130
 131         if (*(ACPI_CAST_PTR(u32, function_name)) == ACPI_PREFIX_LOWER) {
 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         u32 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
 181         if (thread_id != acpi_gbl_prev_thread_id) {
 182                 if (ACPI_LV_THREADS & acpi_dbg_level) {
 183                         acpi_os_printf
 184                             ("\n**** Context Switch from TID %X to TID %X ****\n\n",
 185                              acpi_gbl_prev_thread_id, 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 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
 230 void ACPI_INTERNAL_VAR_XFACE
 231 acpi_ut_debug_print_raw(u32 requested_debug_level,
 232                         u32 line_number,
 233                         const char *function_name,
 234                         char *module_name, u32 component_id, char *format, ...)
 235 {
 236         va_list args;
 237
 238         if (!(requested_debug_level & acpi_dbg_level) ||
 239             !(component_id & acpi_dbg_layer)) {
 240                 return;
 241         }
 242
 243         va_start(args, format);
 244         acpi_os_vprintf(format, args);
 245 }
 246
 247 EXPORT_SYMBOL(acpi_ut_debug_print_raw);
 248
 249 /*******************************************************************************
 250  *
 251  * FUNCTION:    acpi_ut_trace
 252  *
 253  * PARAMETERS:  line_number         - Caller's line number
 254  *              function_name       - Caller's procedure name
 255  *              module_name         - Caller's module name
 256  *              component_id        - Caller's component ID
 257  *
 258  * RETURN:      None
 259  *
 260  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 261  *              set in debug_level
 262  *
 263  ******************************************************************************/
 264
 265 void
 266 acpi_ut_trace(u32 line_number,
 267               const char *function_name, char *module_name, u32 component_id)
 268 {
 269
 270         acpi_gbl_nesting_level++;
 271         acpi_ut_track_stack_ptr();
 272
 273         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 274                             line_number, function_name, module_name,
 275                             component_id, "%s\n", acpi_gbl_fn_entry_str);
 276 }
 277
 278 EXPORT_SYMBOL(acpi_ut_trace);
 279
 280 /*******************************************************************************
 281  *
 282  * FUNCTION:    acpi_ut_trace_ptr
 283  *
 284  * PARAMETERS:  line_number         - Caller's line number
 285  *              function_name       - Caller's procedure name
 286  *              module_name         - Caller's module name
 287  *              component_id        - Caller's component ID
 288  *              Pointer             - Pointer to display
 289  *
 290  * RETURN:      None
 291  *
 292  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 293  *              set in debug_level
 294  *
 295  ******************************************************************************/
 296
 297 void
 298 acpi_ut_trace_ptr(u32 line_number,
 299                   const char *function_name,
 300                   char *module_name, u32 component_id, void *pointer)
 301 {
 302         acpi_gbl_nesting_level++;
 303         acpi_ut_track_stack_ptr();
 304
 305         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 306                             line_number, function_name, module_name,
 307                             component_id, "%s %p\n", acpi_gbl_fn_entry_str,
 308                             pointer);
 309 }
 310
 311 /*******************************************************************************
 312  *
 313  * FUNCTION:    acpi_ut_trace_str
 314  *
 315  * PARAMETERS:  line_number         - Caller's line number
 316  *              function_name       - Caller's procedure name
 317  *              module_name         - Caller's module name
 318  *              component_id        - Caller's component ID
 319  *              String              - Additional string to display
 320  *
 321  * RETURN:      None
 322  *
 323  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 324  *              set in debug_level
 325  *
 326  ******************************************************************************/
 327
 328 void
 329 acpi_ut_trace_str(u32 line_number,
 330                   const char *function_name,
 331                   char *module_name, u32 component_id, char *string)
 332 {
 333
 334         acpi_gbl_nesting_level++;
 335         acpi_ut_track_stack_ptr();
 336
 337         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 338                             line_number, function_name, module_name,
 339                             component_id, "%s %s\n", acpi_gbl_fn_entry_str,
 340                             string);
 341 }
 342
 343 /*******************************************************************************
 344  *
 345  * FUNCTION:    acpi_ut_trace_u32
 346  *
 347  * PARAMETERS:  line_number         - Caller's line number
 348  *              function_name       - Caller's procedure name
 349  *              module_name         - Caller's module name
 350  *              component_id        - Caller's component ID
 351  *              Integer             - Integer to display
 352  *
 353  * RETURN:      None
 354  *
 355  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 356  *              set in debug_level
 357  *
 358  ******************************************************************************/
 359
 360 void
 361 acpi_ut_trace_u32(u32 line_number,
 362                   const char *function_name,
 363                   char *module_name, u32 component_id, u32 integer)
 364 {
 365
 366         acpi_gbl_nesting_level++;
 367         acpi_ut_track_stack_ptr();
 368
 369         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 370                             line_number, function_name, module_name,
 371                             component_id, "%s %08X\n", acpi_gbl_fn_entry_str,
 372                             integer);
 373 }
 374
 375 /*******************************************************************************
 376  *
 377  * FUNCTION:    acpi_ut_exit
 378  *
 379  * PARAMETERS:  line_number         - Caller's line number
 380  *              function_name       - Caller's procedure name
 381  *              module_name         - Caller's module name
 382  *              component_id        - Caller's component ID
 383  *
 384  * RETURN:      None
 385  *
 386  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 387  *              set in debug_level
 388  *
 389  ******************************************************************************/
 390
 391 void
 392 acpi_ut_exit(u32 line_number,
 393              const char *function_name, char *module_name, u32 component_id)
 394 {
 395
 396         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 397                             line_number, function_name, module_name,
 398                             component_id, "%s\n", acpi_gbl_fn_exit_str);
 399
 400         acpi_gbl_nesting_level--;
 401 }
 402
 403 EXPORT_SYMBOL(acpi_ut_exit);
 404
 405 /*******************************************************************************
 406  *
 407  * FUNCTION:    acpi_ut_status_exit
 408  *
 409  * PARAMETERS:  line_number         - Caller's line number
 410  *              function_name       - Caller's procedure name
 411  *              module_name         - Caller's module name
 412  *              component_id        - Caller's component ID
 413  *              Status              - Exit status code
 414  *
 415  * RETURN:      None
 416  *
 417  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 418  *              set in debug_level. Prints exit status also.
 419  *
 420  ******************************************************************************/
 421
 422 void
 423 acpi_ut_status_exit(u32 line_number,
 424                     const char *function_name,
 425                     char *module_name, u32 component_id, acpi_status status)
 426 {
 427
 428         if (ACPI_SUCCESS(status)) {
 429                 acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 430                                     line_number, function_name, module_name,
 431                                     component_id, "%s %s\n",
 432                                     acpi_gbl_fn_exit_str,
 433                                     acpi_format_exception(status));
 434         } else {
 435                 acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 436                                     line_number, function_name, module_name,
 437                                     component_id, "%s ****Exception****: %s\n",
 438                                     acpi_gbl_fn_exit_str,
 439                                     acpi_format_exception(status));
 440         }
 441
 442         acpi_gbl_nesting_level--;
 443 }
 444
 445 EXPORT_SYMBOL(acpi_ut_status_exit);
 446
 447 /*******************************************************************************
 448  *
 449  * FUNCTION:    acpi_ut_value_exit
 450  *
 451  * PARAMETERS:  line_number         - Caller's line number
 452  *              function_name       - Caller's procedure name
 453  *              module_name         - Caller's module name
 454  *              component_id        - Caller's component ID
 455  *              Value               - Value to be printed with exit msg
 456  *
 457  * RETURN:      None
 458  *
 459  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 460  *              set in debug_level. Prints exit value also.
 461  *
 462  ******************************************************************************/
 463
 464 void
 465 acpi_ut_value_exit(u32 line_number,
 466                    const char *function_name,
 467                    char *module_name, u32 component_id, acpi_integer value)
 468 {
 469
 470         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 471                             line_number, function_name, module_name,
 472                             component_id, "%s %8.8X%8.8X\n",
 473                             acpi_gbl_fn_exit_str, ACPI_FORMAT_UINT64(value));
 474
 475         acpi_gbl_nesting_level--;
 476 }
 477
 478 EXPORT_SYMBOL(acpi_ut_value_exit);
 479
 480 /*******************************************************************************
 481  *
 482  * FUNCTION:    acpi_ut_ptr_exit
 483  *
 484  * PARAMETERS:  line_number         - Caller's line number
 485  *              function_name       - Caller's procedure name
 486  *              module_name         - Caller's module name
 487  *              component_id        - Caller's component ID
 488  *              Ptr                 - Pointer to display
 489  *
 490  * RETURN:      None
 491  *
 492  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 493  *              set in debug_level. Prints exit value also.
 494  *
 495  ******************************************************************************/
 496
 497 void
 498 acpi_ut_ptr_exit(u32 line_number,
 499                  const char *function_name,
 500                  char *module_name, u32 component_id, u8 * ptr)
 501 {
 502
 503         acpi_ut_debug_print(ACPI_LV_FUNCTIONS,
 504                             line_number, function_name, module_name,
 505                             component_id, "%s %p\n", acpi_gbl_fn_exit_str, ptr);
 506
 507         acpi_gbl_nesting_level--;
 508 }
 509
 510 #endif
 511
 512 /*******************************************************************************
 513  *
 514  * FUNCTION:    acpi_ut_dump_buffer
 515  *
 516  * PARAMETERS:  Buffer              - Buffer to dump
 517  *              Count               - Amount to dump, in bytes
 518  *              Display             - BYTE, WORD, DWORD, or QWORD display
 519  *              component_iD        - Caller's component ID
 520  *
 521  * RETURN:      None
 522  *
 523  * DESCRIPTION: Generic dump buffer in both hex and ascii.
 524  *
 525  ******************************************************************************/
 526
 527 void acpi_ut_dump_buffer(u8 * buffer, u32 count, u32 display, u32 component_id)
 528 {
 529         acpi_native_uint i = 0;
 530         acpi_native_uint j;
 531         u32 temp32;
 532         u8 buf_char;
 533
 534         /* Only dump the buffer if tracing is enabled */
 535
 536         if (!((ACPI_LV_TABLES & acpi_dbg_level) &&
 537               (component_id & acpi_dbg_layer))) {
 538                 return;
 539         }
 540
 541         if ((count < 4) || (count & 0x01)) {
 542                 display = DB_BYTE_DISPLAY;
 543         }
 544
 545         /* Nasty little dump buffer routine! */
 546
 547         while (i < count) {
 548                 /* Print current offset */
 549
 550                 acpi_os_printf("%6.4X: ", (u32) i);
 551
 552                 /* Print 16 hex chars */
 553
 554                 for (j = 0; j < 16;) {
 555                         if (i + j >= count) {
 556                                 /* Dump fill spaces */
 557
 558                                 acpi_os_printf("%*s", ((display * 2) + 1), " ");
 559                                 j += (acpi_native_uint) display;
 560                                 continue;
 561                         }
 562
 563                         switch (display) {
 564                         default:        /* Default is BYTE display */
 565
 566                                 acpi_os_printf("%02X ", buffer[i + j]);
 567                                 break;
 568
 569                         case DB_WORD_DISPLAY:
 570
 571                                 ACPI_MOVE_16_TO_32(&temp32, &buffer[i + j]);
 572                                 acpi_os_printf("%04X ", temp32);
 573                                 break;
 574
 575                         case DB_DWORD_DISPLAY:
 576
 577                                 ACPI_MOVE_32_TO_32(&temp32, &buffer[i + j]);
 578                                 acpi_os_printf("%08X ", temp32);
 579                                 break;
 580
 581                         case DB_QWORD_DISPLAY:
 582
 583                                 ACPI_MOVE_32_TO_32(&temp32, &buffer[i + j]);
 584                                 acpi_os_printf("%08X", temp32);
 585
 586                                 ACPI_MOVE_32_TO_32(&temp32, &buffer[i + j + 4]);
 587                                 acpi_os_printf("%08X ", temp32);
 588                                 break;
 589                         }
 590
 591                         j += (acpi_native_uint) display;
 592                 }
 593
 594                 /*
 595                  * Print the ASCII equivalent characters but watch out for the bad
 596                  * unprintable ones (printable chars are 0x20 through 0x7E)
 597                  */
 598                 acpi_os_printf(" ");
 599                 for (j = 0; j < 16; j++) {
 600                         if (i + j >= count) {
 601                                 acpi_os_printf("\n");
 602                                 return;
 603                         }
 604
 605                         buf_char = buffer[i + j];
 606                         if (ACPI_IS_PRINT(buf_char)) {
 607                                 acpi_os_printf("%c", buf_char);
 608                         } else {
 609                                 acpi_os_printf(".");
 610                         }
 611                 }
 612
 613                 /* Done with that line. */
 614
 615                 acpi_os_printf("\n");
 616                 i += 16;
 617         }
 618
 619         return;
 620 }