drivers/acpi/acpica/utdebug.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utdebug - Debug print routines
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2010, 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
  47 #define _COMPONENT          ACPI_UTILITIES
  48 ACPI_MODULE_NAME("utdebug")
  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         acpi_size current_sp;
  73
  74         acpi_gbl_entry_stack_pointer = &current_sp;
  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         if (&current_sp < acpi_gbl_lowest_stack_pointer) {
  94                 acpi_gbl_lowest_stack_pointer = &current_sp;
  95         }
  96
  97         if (acpi_gbl_nesting_level > acpi_gbl_deepest_nesting) {
  98                 acpi_gbl_deepest_nesting = acpi_gbl_nesting_level;
  99         }
 100 }
 101
 102 /*******************************************************************************
 103  *
 104  * FUNCTION:    acpi_ut_trim_function_name
 105  *
 106  * PARAMETERS:  function_name       - Ascii string containing a procedure name
 107  *
 108  * RETURN:      Updated pointer to the function name
 109  *
 110  * DESCRIPTION: Remove the "Acpi" prefix from the function name, if present.
 111  *              This allows compiler macros such as __func__ to be used
 112  *              with no change to the debug output.
 113  *
 114  ******************************************************************************/
 115
 116 static const char *acpi_ut_trim_function_name(const char *function_name)
 117 {
 118
 119         /* All Function names are longer than 4 chars, check is safe */
 120
 121         if (*(ACPI_CAST_PTR(u32, function_name)) == ACPI_PREFIX_MIXED) {
 122
 123                 /* This is the case where the original source has not been modified */
 124
 125                 return (function_name + 4);
 126         }
 127
 128         if (*(ACPI_CAST_PTR(u32, function_name)) == ACPI_PREFIX_LOWER) {
 129
 130                 /* This is the case where the source has been 'linuxized' */
 131
 132                 return (function_name + 5);
 133         }
 134
 135         return (function_name);
 136 }
 137
 138 /*******************************************************************************
 139  *
 140  * FUNCTION:    acpi_debug_print
 141  *
 142  * PARAMETERS:  requested_debug_level - Requested debug print level
 143  *              line_number         - Caller's line number (for error output)
 144  *              function_name       - Caller's procedure name
 145  *              module_name         - Caller's module name
 146  *              component_id        - Caller's component ID
 147  *              Format              - Printf format field
 148  *              ...                 - Optional printf arguments
 149  *
 150  * RETURN:      None
 151  *
 152  * DESCRIPTION: Print error message with prefix consisting of the module name,
 153  *              line number, and component ID.
 154  *
 155  ******************************************************************************/
 156
 157 void ACPI_INTERNAL_VAR_XFACE
 158 acpi_debug_print(u32 requested_debug_level,
 159                  u32 line_number,
 160                  const char *function_name,
 161                  const char *module_name,
 162                  u32 component_id, const char *format, ...)
 163 {
 164         acpi_thread_id thread_id;
 165         va_list args;
 166
 167         /*
 168          * Stay silent if the debug level or component ID is disabled
 169          */
 170         if (!(requested_debug_level & acpi_dbg_level) ||
 171             !(component_id & acpi_dbg_layer)) {
 172                 return;
 173         }
 174
 175         /*
 176          * Thread tracking and context switch notification
 177          */
 178         thread_id = acpi_os_get_thread_id();
 179         if (thread_id != acpi_gbl_prev_thread_id) {
 180                 if (ACPI_LV_THREADS & acpi_dbg_level) {
 181                         acpi_os_printf
 182                             ("\n**** Context Switch from TID %p to TID %p ****\n\n",
 183                              ACPI_CAST_PTR(void, acpi_gbl_prev_thread_id),
 184                              ACPI_CAST_PTR(void, thread_id));
 185                 }
 186
 187                 acpi_gbl_prev_thread_id = thread_id;
 188         }
 189
 190         /*
 191          * Display the module name, current line number, thread ID (if requested),
 192          * current procedure nesting level, and the current procedure name
 193          */
 194         acpi_os_printf("%8s-%04ld ", module_name, line_number);
 195
 196         if (ACPI_LV_THREADS & acpi_dbg_level) {
 197                 acpi_os_printf("[%p] ", ACPI_CAST_PTR(void, thread_id));
 198         }
 199
 200         acpi_os_printf("[%02ld] %-22.22s: ",
 201                        acpi_gbl_nesting_level,
 202                        acpi_ut_trim_function_name(function_name));
 203
 204         va_start(args, format);
 205         acpi_os_vprintf(format, args);
 206         va_end(args);
 207 }
 208
 209 ACPI_EXPORT_SYMBOL(acpi_debug_print)
 210
 211 /*******************************************************************************
 212  *
 213  * FUNCTION:    acpi_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_debug_print_raw(u32 requested_debug_level,
 231                      u32 line_number,
 232                      const char *function_name,
 233                      const char *module_name,
 234                      u32 component_id, const 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         va_end(args);
 246 }
 247
 248 ACPI_EXPORT_SYMBOL(acpi_debug_print_raw)
 249
 250 /*******************************************************************************
 251  *
 252  * FUNCTION:    acpi_ut_trace
 253  *
 254  * PARAMETERS:  line_number         - Caller's line number
 255  *              function_name       - Caller's procedure name
 256  *              module_name         - Caller's module name
 257  *              component_id        - Caller's component ID
 258  *
 259  * RETURN:      None
 260  *
 261  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 262  *              set in debug_level
 263  *
 264  ******************************************************************************/
 265 void
 266 acpi_ut_trace(u32 line_number,
 267               const char *function_name,
 268               const char *module_name, u32 component_id)
 269 {
 270
 271         acpi_gbl_nesting_level++;
 272         acpi_ut_track_stack_ptr();
 273
 274         acpi_debug_print(ACPI_LV_FUNCTIONS,
 275                          line_number, function_name, module_name, component_id,
 276                          "%s\n", acpi_gbl_fn_entry_str);
 277 }
 278
 279 ACPI_EXPORT_SYMBOL(acpi_ut_trace)
 280
 281 /*******************************************************************************
 282  *
 283  * FUNCTION:    acpi_ut_trace_ptr
 284  *
 285  * PARAMETERS:  line_number         - Caller's line number
 286  *              function_name       - Caller's procedure name
 287  *              module_name         - Caller's module name
 288  *              component_id        - Caller's component ID
 289  *              Pointer             - Pointer to display
 290  *
 291  * RETURN:      None
 292  *
 293  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 294  *              set in debug_level
 295  *
 296  ******************************************************************************/
 297 void
 298 acpi_ut_trace_ptr(u32 line_number,
 299                   const char *function_name,
 300                   const char *module_name, u32 component_id, void *pointer)
 301 {
 302         acpi_gbl_nesting_level++;
 303         acpi_ut_track_stack_ptr();
 304
 305         acpi_debug_print(ACPI_LV_FUNCTIONS,
 306                          line_number, function_name, module_name, component_id,
 307                          "%s %p\n", acpi_gbl_fn_entry_str, pointer);
 308 }
 309
 310 /*******************************************************************************
 311  *
 312  * FUNCTION:    acpi_ut_trace_str
 313  *
 314  * PARAMETERS:  line_number         - Caller's line number
 315  *              function_name       - Caller's procedure name
 316  *              module_name         - Caller's module name
 317  *              component_id        - Caller's component ID
 318  *              String              - Additional string to display
 319  *
 320  * RETURN:      None
 321  *
 322  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 323  *              set in debug_level
 324  *
 325  ******************************************************************************/
 326
 327 void
 328 acpi_ut_trace_str(u32 line_number,
 329                   const char *function_name,
 330                   const char *module_name, u32 component_id, char *string)
 331 {
 332
 333         acpi_gbl_nesting_level++;
 334         acpi_ut_track_stack_ptr();
 335
 336         acpi_debug_print(ACPI_LV_FUNCTIONS,
 337                          line_number, function_name, module_name, component_id,
 338                          "%s %s\n", acpi_gbl_fn_entry_str, string);
 339 }
 340
 341 /*******************************************************************************
 342  *
 343  * FUNCTION:    acpi_ut_trace_u32
 344  *
 345  * PARAMETERS:  line_number         - Caller's line number
 346  *              function_name       - Caller's procedure name
 347  *              module_name         - Caller's module name
 348  *              component_id        - Caller's component ID
 349  *              Integer             - Integer to display
 350  *
 351  * RETURN:      None
 352  *
 353  * DESCRIPTION: Function entry trace.  Prints only if TRACE_FUNCTIONS bit is
 354  *              set in debug_level
 355  *
 356  ******************************************************************************/
 357
 358 void
 359 acpi_ut_trace_u32(u32 line_number,
 360                   const char *function_name,
 361                   const char *module_name, u32 component_id, u32 integer)
 362 {
 363
 364         acpi_gbl_nesting_level++;
 365         acpi_ut_track_stack_ptr();
 366
 367         acpi_debug_print(ACPI_LV_FUNCTIONS,
 368                          line_number, function_name, module_name, component_id,
 369                          "%s %08X\n", acpi_gbl_fn_entry_str, 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,
 391              const char *module_name, u32 component_id)
 392 {
 393
 394         acpi_debug_print(ACPI_LV_FUNCTIONS,
 395                          line_number, function_name, module_name, component_id,
 396                          "%s\n", acpi_gbl_fn_exit_str);
 397
 398         acpi_gbl_nesting_level--;
 399 }
 400
 401 ACPI_EXPORT_SYMBOL(acpi_ut_exit)
 402
 403 /*******************************************************************************
 404  *
 405  * FUNCTION:    acpi_ut_status_exit
 406  *
 407  * PARAMETERS:  line_number         - Caller's line number
 408  *              function_name       - Caller's procedure name
 409  *              module_name         - Caller's module name
 410  *              component_id        - Caller's component ID
 411  *              Status              - Exit status code
 412  *
 413  * RETURN:      None
 414  *
 415  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 416  *              set in debug_level. Prints exit status also.
 417  *
 418  ******************************************************************************/
 419 void
 420 acpi_ut_status_exit(u32 line_number,
 421                     const char *function_name,
 422                     const char *module_name,
 423                     u32 component_id, acpi_status status)
 424 {
 425
 426         if (ACPI_SUCCESS(status)) {
 427                 acpi_debug_print(ACPI_LV_FUNCTIONS,
 428                                  line_number, function_name, module_name,
 429                                  component_id, "%s %s\n", acpi_gbl_fn_exit_str,
 430                                  acpi_format_exception(status));
 431         } else {
 432                 acpi_debug_print(ACPI_LV_FUNCTIONS,
 433                                  line_number, function_name, module_name,
 434                                  component_id, "%s ****Exception****: %s\n",
 435                                  acpi_gbl_fn_exit_str,
 436                                  acpi_format_exception(status));
 437         }
 438
 439         acpi_gbl_nesting_level--;
 440 }
 441
 442 ACPI_EXPORT_SYMBOL(acpi_ut_status_exit)
 443
 444 /*******************************************************************************
 445  *
 446  * FUNCTION:    acpi_ut_value_exit
 447  *
 448  * PARAMETERS:  line_number         - Caller's line number
 449  *              function_name       - Caller's procedure name
 450  *              module_name         - Caller's module name
 451  *              component_id        - Caller's component ID
 452  *              Value               - Value to be printed with exit msg
 453  *
 454  * RETURN:      None
 455  *
 456  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 457  *              set in debug_level. Prints exit value also.
 458  *
 459  ******************************************************************************/
 460 void
 461 acpi_ut_value_exit(u32 line_number,
 462                    const char *function_name,
 463                    const char *module_name,
 464                    u32 component_id, acpi_integer value)
 465 {
 466
 467         acpi_debug_print(ACPI_LV_FUNCTIONS,
 468                          line_number, function_name, module_name, component_id,
 469                          "%s %8.8X%8.8X\n", acpi_gbl_fn_exit_str,
 470                          ACPI_FORMAT_UINT64(value));
 471
 472         acpi_gbl_nesting_level--;
 473 }
 474
 475 ACPI_EXPORT_SYMBOL(acpi_ut_value_exit)
 476
 477 /*******************************************************************************
 478  *
 479  * FUNCTION:    acpi_ut_ptr_exit
 480  *
 481  * PARAMETERS:  line_number         - Caller's line number
 482  *              function_name       - Caller's procedure name
 483  *              module_name         - Caller's module name
 484  *              component_id        - Caller's component ID
 485  *              Ptr                 - Pointer to display
 486  *
 487  * RETURN:      None
 488  *
 489  * DESCRIPTION: Function exit trace.  Prints only if TRACE_FUNCTIONS bit is
 490  *              set in debug_level. Prints exit value also.
 491  *
 492  ******************************************************************************/
 493 void
 494 acpi_ut_ptr_exit(u32 line_number,
 495                  const char *function_name,
 496                  const char *module_name, u32 component_id, u8 *ptr)
 497 {
 498
 499         acpi_debug_print(ACPI_LV_FUNCTIONS,
 500                          line_number, function_name, module_name, component_id,
 501                          "%s %p\n", acpi_gbl_fn_exit_str, ptr);
 502
 503         acpi_gbl_nesting_level--;
 504 }
 505
 506 #endif
 507
 508 /*******************************************************************************
 509  *
 510  * FUNCTION:    acpi_ut_dump_buffer
 511  *
 512  * PARAMETERS:  Buffer              - Buffer to dump
 513  *              Count               - Amount to dump, in bytes
 514  *              Display             - BYTE, WORD, DWORD, or QWORD display
 515  *              component_iD        - Caller's component ID
 516  *
 517  * RETURN:      None
 518  *
 519  * DESCRIPTION: Generic dump buffer in both hex and ascii.
 520  *
 521  ******************************************************************************/
 522
 523 void acpi_ut_dump_buffer2(u8 * buffer, u32 count, u32 display)
 524 {
 525         u32 i = 0;
 526         u32 j;
 527         u32 temp32;
 528         u8 buf_char;
 529
 530         if (!buffer) {
 531                 acpi_os_printf("Null Buffer Pointer in DumpBuffer!\n");
 532                 return;
 533         }
 534
 535         if ((count < 4) || (count & 0x01)) {
 536                 display = DB_BYTE_DISPLAY;
 537         }
 538
 539         /* Nasty little dump buffer routine! */
 540
 541         while (i < count) {
 542
 543                 /* Print current offset */
 544
 545                 acpi_os_printf("%6.4X: ", i);
 546
 547                 /* Print 16 hex chars */
 548
 549                 for (j = 0; j < 16;) {
 550                         if (i + j >= count) {
 551
 552                                 /* Dump fill spaces */
 553
 554                                 acpi_os_printf("%*s", ((display * 2) + 1), " ");
 555                                 j += display;
 556                                 continue;
 557                         }
 558
 559                         switch (display) {
 560                         case DB_BYTE_DISPLAY:
 561                         default:        /* Default is BYTE display */
 562
 563                                 acpi_os_printf("%02X ",
 564                                                buffer[(acpi_size) i + j]);
 565                                 break;
 566
 567                         case DB_WORD_DISPLAY:
 568
 569                                 ACPI_MOVE_16_TO_32(&temp32,
 570                                                    &buffer[(acpi_size) i + j]);
 571                                 acpi_os_printf("%04X ", temp32);
 572                                 break;
 573
 574                         case DB_DWORD_DISPLAY:
 575
 576                                 ACPI_MOVE_32_TO_32(&temp32,
 577                                                    &buffer[(acpi_size) i + j]);
 578                                 acpi_os_printf("%08X ", temp32);
 579                                 break;
 580
 581                         case DB_QWORD_DISPLAY:
 582
 583                                 ACPI_MOVE_32_TO_32(&temp32,
 584                                                    &buffer[(acpi_size) i + j]);
 585                                 acpi_os_printf("%08X", temp32);
 586
 587                                 ACPI_MOVE_32_TO_32(&temp32,
 588                                                    &buffer[(acpi_size) i + j +
 589                                                            4]);
 590                                 acpi_os_printf("%08X ", temp32);
 591                                 break;
 592                         }
 593
 594                         j += display;
 595                 }
 596
 597                 /*
 598                  * Print the ASCII equivalent characters but watch out for the bad
 599                  * unprintable ones (printable chars are 0x20 through 0x7E)
 600                  */
 601                 acpi_os_printf(" ");
 602                 for (j = 0; j < 16; j++) {
 603                         if (i + j >= count) {
 604                                 acpi_os_printf("\n");
 605                                 return;
 606                         }
 607
 608                         buf_char = buffer[(acpi_size) i + j];
 609                         if (ACPI_IS_PRINT(buf_char)) {
 610                                 acpi_os_printf("%c", buf_char);
 611                         } else {
 612                                 acpi_os_printf(".");
 613                         }
 614                 }
 615
 616                 /* Done with that line. */
 617
 618                 acpi_os_printf("\n");
 619                 i += 16;
 620         }
 621
 622         return;
 623 }
 624
 625 /*******************************************************************************
 626  *
 627  * FUNCTION:    acpi_ut_dump_buffer
 628  *
 629  * PARAMETERS:  Buffer              - Buffer to dump
 630  *              Count               - Amount to dump, in bytes
 631  *              Display             - BYTE, WORD, DWORD, or QWORD display
 632  *              component_iD        - Caller's component ID
 633  *
 634  * RETURN:      None
 635  *
 636  * DESCRIPTION: Generic dump buffer in both hex and ascii.
 637  *
 638  ******************************************************************************/
 639
 640 void acpi_ut_dump_buffer(u8 * buffer, u32 count, u32 display, u32 component_id)
 641 {
 642
 643         /* Only dump the buffer if tracing is enabled */
 644
 645         if (!((ACPI_LV_TABLES & acpi_dbg_level) &&
 646               (component_id & acpi_dbg_layer))) {
 647                 return;
 648         }
 649
 650         acpi_ut_dump_buffer2(buffer, count, display);
 651 }