src/intel/tools/aubinator_error_decode.c

   1 /*
   2  * Copyright © 2007-2017 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include <stdbool.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <stdarg.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <inttypes.h>
  32 #include <errno.h>
  33 #include <sys/stat.h>
  34 #include <sys/types.h>
  35 #include <sys/wait.h>
  36 #include <err.h>
  37 #include <assert.h>
  38 #include <getopt.h>
  39 #include <zlib.h>
  40
  41 #include "common/gen_decoder.h"
  42 #include "util/macros.h"
  43
  44 #define CSI "\e["
  45 #define BLUE_HEADER  CSI "0;44m"
  46 #define GREEN_HEADER CSI "1;42m"
  47 #define NORMAL       CSI "0m"
  48
  49 #define MIN(a, b) ((a) < (b) ? (a) : (b))
  50
  51 /* options */
  52
  53 static bool option_full_decode = true;
  54 static bool option_print_offsets = true;
  55 static enum { COLOR_AUTO, COLOR_ALWAYS, COLOR_NEVER } option_color;
  56 static char *xml_path = NULL;
  57
  58 static uint32_t
  59 print_head(unsigned int reg)
  60 {
  61    printf("    head = 0x%08x, wraps = %d\n", reg & (0x7ffff<<2), reg >> 21);
  62    return reg & (0x7ffff<<2);
  63 }
  64
  65 static void
  66 print_register(struct gen_spec *spec, const char *name, uint32_t reg)
  67 {
  68    struct gen_group *reg_spec = gen_spec_find_register_by_name(spec, name);
  69
  70    if (reg_spec) {
  71       gen_print_group(stdout, reg_spec, 0, &reg, 0,
  72                       option_color == COLOR_ALWAYS);
  73    }
  74 }
  75
  76 struct ring_register_mapping {
  77    const char *ring_name;
  78    const char *register_name;
  79 };
  80
  81 static const struct ring_register_mapping acthd_registers[] = {
  82    { "blt", "BCS_ACTHD_UDW" },
  83    { "bsd", "VCS_ACTHD_UDW" },
  84    { "bsd2", "VCS2_ACTHD_UDW" },
  85    { "render", "ACTHD_UDW" },
  86    { "vebox", "VECS_ACTHD_UDW" },
  87 };
  88
  89 static const struct ring_register_mapping ctl_registers[] = {
  90    { "blt", "BCS_RING_BUFFER_CTL" },
  91    { "bsd", "VCS_RING_BUFFER_CTL" },
  92    { "bsd2", "VCS2_RING_BUFFER_CTL" },
  93    { "render", "RCS_RING_BUFFER_CTL" },
  94    { "vebox", "VECS_RING_BUFFER_CTL" },
  95 };
  96
  97 static const struct ring_register_mapping fault_registers[] = {
  98    { "blt", "BCS_FAULT_REG" },
  99    { "bsd", "VCS_FAULT_REG" },
 100    { "render", "RCS_FAULT_REG" },
 101    { "vebox", "VECS_FAULT_REG" },
 102 };
 103
 104 static const char *
 105 register_name_from_ring(const struct ring_register_mapping *mapping,
 106                         unsigned nb_mapping,
 107                         const char *ring_name)
 108 {
 109    for (unsigned i = 0; i < nb_mapping; i++) {
 110       if (strcmp(mapping[i].ring_name, ring_name) == 0)
 111          return mapping[i].register_name;
 112    }
 113    return NULL;
 114 }
 115
 116 static const char *
 117 instdone_register_for_ring(const struct gen_device_info *devinfo,
 118                            const char *ring_name)
 119 {
 120    if (strcmp(ring_name, "blt") == 0)
 121       return "BCS_INSTDONE";
 122    else if (strcmp(ring_name, "vebox") == 0)
 123       return "VECS_INSTDONE";
 124    else if (strcmp(ring_name, "bsd") == 0)
 125       return "VCS_INSTDONE";
 126    else if (strcmp(ring_name, "render") == 0) {
 127       if (devinfo->gen == 6)
 128          return "INSTDONE_2";
 129       return "INSTDONE_1";
 130    }
 131
 132    return NULL;
 133 }
 134
 135 static void
 136 print_pgtbl_err(unsigned int reg, struct gen_device_info *devinfo)
 137 {
 138    if (reg & (1 << 26))
 139       printf("    Invalid Sampler Cache GTT entry\n");
 140    if (reg & (1 << 24))
 141       printf("    Invalid Render Cache GTT entry\n");
 142    if (reg & (1 << 23))
 143       printf("    Invalid Instruction/State Cache GTT entry\n");
 144    if (reg & (1 << 22))
 145       printf("    There is no ROC, this cannot occur!\n");
 146    if (reg & (1 << 21))
 147       printf("    Invalid GTT entry during Vertex Fetch\n");
 148    if (reg & (1 << 20))
 149       printf("    Invalid GTT entry during Command Fetch\n");
 150    if (reg & (1 << 19))
 151       printf("    Invalid GTT entry during CS\n");
 152    if (reg & (1 << 18))
 153       printf("    Invalid GTT entry during Cursor Fetch\n");
 154    if (reg & (1 << 17))
 155       printf("    Invalid GTT entry during Overlay Fetch\n");
 156    if (reg & (1 << 8))
 157       printf("    Invalid GTT entry during Display B Fetch\n");
 158    if (reg & (1 << 4))
 159       printf("    Invalid GTT entry during Display A Fetch\n");
 160    if (reg & (1 << 1))
 161       printf("    Valid PTE references illegal memory\n");
 162    if (reg & (1 << 0))
 163       printf("    Invalid GTT entry during fetch for host\n");
 164 }
 165
 166 static void
 167 print_snb_fence(struct gen_device_info *devinfo, uint64_t fence)
 168 {
 169    printf("    %svalid, %c-tiled, pitch: %i, start: 0x%08x, size: %u\n",
 170           fence & 1 ? "" : "in",
 171           fence & (1<<1) ? 'y' : 'x',
 172           (int)(((fence>>32)&0xfff)+1)*128,
 173           (uint32_t)fence & 0xfffff000,
 174           (uint32_t)(((fence>>32)&0xfffff000) - (fence&0xfffff000) + 4096));
 175 }
 176
 177 static void
 178 print_i965_fence(struct gen_device_info *devinfo, uint64_t fence)
 179 {
 180    printf("    %svalid, %c-tiled, pitch: %i, start: 0x%08x, size: %u\n",
 181           fence & 1 ? "" : "in",
 182           fence & (1<<1) ? 'y' : 'x',
 183           (int)(((fence>>2)&0x1ff)+1)*128,
 184           (uint32_t)fence & 0xfffff000,
 185           (uint32_t)(((fence>>32)&0xfffff000) - (fence&0xfffff000) + 4096));
 186 }
 187
 188 static void
 189 print_fence(struct gen_device_info *devinfo, uint64_t fence)
 190 {
 191    if (devinfo->gen == 6 || devinfo->gen == 7) {
 192       return print_snb_fence(devinfo, fence);
 193    } else if (devinfo->gen == 4 || devinfo->gen == 5) {
 194       return print_i965_fence(devinfo, fence);
 195    }
 196 }
 197
 198 static void
 199 print_fault_data(struct gen_device_info *devinfo, uint32_t data1, uint32_t data0)
 200 {
 201    uint64_t address;
 202
 203    if (devinfo->gen < 8)
 204       return;
 205
 206    address = ((uint64_t)(data0) << 12) | ((uint64_t)data1 & 0xf) << 44;
 207    printf("    Address 0x%016" PRIx64 " %s\n", address,
 208           data1 & (1 << 4) ? "GGTT" : "PPGTT");
 209 }
 210
 211 #define CSI "\e["
 212 #define NORMAL       CSI "0m"
 213
 214 struct section {
 215    uint64_t gtt_offset;
 216    char *ring_name;
 217    const char *buffer_name;
 218    uint32_t *data;
 219    int count;
 220 };
 221
 222 #define MAX_SECTIONS 30
 223 static struct section sections[MAX_SECTIONS];
 224
 225 static int zlib_inflate(uint32_t **ptr, int len)
 226 {
 227    struct z_stream_s zstream;
 228    void *out;
 229    const uint32_t out_size = 128*4096;  /* approximate obj size */
 230
 231    memset(&zstream, 0, sizeof(zstream));
 232
 233    zstream.next_in = (unsigned char *)*ptr;
 234    zstream.avail_in = 4*len;
 235
 236    if (inflateInit(&zstream) != Z_OK)
 237       return 0;
 238
 239    out = malloc(out_size);
 240    zstream.next_out = out;
 241    zstream.avail_out = out_size;
 242
 243    do {
 244       switch (inflate(&zstream, Z_SYNC_FLUSH)) {
 245       case Z_STREAM_END:
 246          goto end;
 247       case Z_OK:
 248          break;
 249       default:
 250          inflateEnd(&zstream);
 251          return 0;
 252       }
 253
 254       if (zstream.avail_out)
 255          break;
 256
 257       out = realloc(out, 2*zstream.total_out);
 258       if (out == NULL) {
 259          inflateEnd(&zstream);
 260          return 0;
 261       }
 262
 263       zstream.next_out = (unsigned char *)out + zstream.total_out;
 264       zstream.avail_out = zstream.total_out;
 265    } while (1);
 266  end:
 267    inflateEnd(&zstream);
 268    free(*ptr);
 269    *ptr = out;
 270    return zstream.total_out / 4;
 271 }
 272
 273 static int ascii85_decode(const char *in, uint32_t **out, bool inflate)
 274 {
 275    int len = 0, size = 1024;
 276
 277    *out = realloc(*out, sizeof(uint32_t)*size);
 278    if (*out == NULL)
 279       return 0;
 280
 281    while (*in >= '!' && *in <= 'z') {
 282       uint32_t v = 0;
 283
 284       if (len == size) {
 285          size *= 2;
 286          *out = realloc(*out, sizeof(uint32_t)*size);
 287          if (*out == NULL)
 288             return 0;
 289       }
 290
 291       if (*in == 'z') {
 292          in++;
 293       } else {
 294          v += in[0] - 33; v *= 85;
 295          v += in[1] - 33; v *= 85;
 296          v += in[2] - 33; v *= 85;
 297          v += in[3] - 33; v *= 85;
 298          v += in[4] - 33;
 299          in += 5;
 300       }
 301       (*out)[len++] = v;
 302    }
 303
 304    if (!inflate)
 305       return len;
 306
 307    return zlib_inflate(out, len);
 308 }
 309
 310 static struct gen_batch_decode_bo
 311 get_gen_batch_bo(void *user_data, uint64_t address)
 312 {
 313    for (int s = 0; s < MAX_SECTIONS; s++) {
 314       if (sections[s].gtt_offset <= address &&
 315           address < sections[s].gtt_offset + sections[s].count) {
 316          return (struct gen_batch_decode_bo) {
 317             .addr = sections[s].gtt_offset,
 318             .map = sections[s].data,
 319             .size = sections[s].count,
 320          };
 321       }
 322    }
 323
 324    return (struct gen_batch_decode_bo) { .map = NULL };
 325 }
 326
 327 static void
 328 read_data_file(FILE *file)
 329 {
 330    struct gen_spec *spec = NULL;
 331    long long unsigned fence;
 332    int matched;
 333    char *line = NULL;
 334    size_t line_size;
 335    uint32_t offset, value;
 336    char *ring_name = NULL;
 337    struct gen_device_info devinfo;
 338    int sect_num = 0;
 339
 340    while (getline(&line, &line_size, file) > 0) {
 341       char *new_ring_name = NULL;
 342       char *dashes;
 343
 344       if (sscanf(line, "%m[^ ] command stream\n", &new_ring_name) > 0) {
 345          free(ring_name);
 346          ring_name = new_ring_name;
 347       }
 348
 349       if (line[0] == ':' || line[0] == '~') {
 350          uint32_t *data = NULL;
 351          int count = ascii85_decode(line+1, &data, line[0] == ':');
 352          if (count == 0) {
 353             fprintf(stderr, "ASCII85 decode failed.\n");
 354             exit(EXIT_FAILURE);
 355          }
 356          sections[sect_num].data = data;
 357          sections[sect_num].count = count;
 358          sect_num++;
 359          continue;
 360       }
 361
 362       dashes = strstr(line, "---");
 363       if (dashes) {
 364          const struct {
 365             const char *match;
 366             const char *name;
 367          } buffers[] = {
 368             { "ringbuffer", "ring buffer" },
 369             { "gtt_offset", "batch buffer" },
 370             { "hw context", "HW Context" },
 371             { "hw status", "HW status" },
 372             { "wa context", "WA context" },
 373             { "wa batchbuffer", "WA batch" },
 374             { "user", "user" },
 375             { "semaphores", "semaphores", },
 376             { "guc log buffer", "GuC log", },
 377             { NULL, "unknown" },
 378          }, *b;
 379
 380          free(ring_name);
 381          ring_name = malloc(dashes - line);
 382          strncpy(ring_name, line, dashes - line);
 383          ring_name[dashes - line - 1] = '\0';
 384
 385          dashes += 4;
 386          for (b = buffers; b->match; b++) {
 387             if (strncasecmp(dashes, b->match, strlen(b->match)) == 0)
 388                break;
 389          }
 390
 391          sections[sect_num].buffer_name = b->name;
 392          sections[sect_num].ring_name = strdup(ring_name);
 393
 394          uint32_t hi, lo;
 395          dashes = strchr(dashes, '=');
 396          if (dashes && sscanf(dashes, "= 0x%08x %08x\n", &hi, &lo))
 397             sections[sect_num].gtt_offset = ((uint64_t) hi) << 32 | lo;
 398
 399          continue;
 400       }
 401
 402       matched = sscanf(line, "%08x : %08x", &offset, &value);
 403       if (matched != 2) {
 404          uint32_t reg, reg2;
 405
 406          /* display reg section is after the ringbuffers, don't mix them */
 407          printf("%s", line);
 408
 409          matched = sscanf(line, "PCI ID: 0x%04x\n", &reg);
 410          if (matched == 0)
 411             matched = sscanf(line, " PCI ID: 0x%04x\n", &reg);
 412          if (matched == 0) {
 413             const char *pci_id_start = strstr(line, "PCI ID");
 414             if (pci_id_start)
 415                matched = sscanf(pci_id_start, "PCI ID: 0x%04x\n", &reg);
 416          }
 417          if (matched == 1) {
 418             if (!gen_get_device_info(reg, &devinfo)) {
 419                printf("Unable to identify devid=%x\n", reg);
 420                exit(EXIT_FAILURE);
 421             }
 422
 423             printf("Detected GEN%i chipset\n", devinfo.gen);
 424
 425             if (xml_path == NULL)
 426                spec = gen_spec_load(&devinfo);
 427             else
 428                spec = gen_spec_load_from_path(&devinfo, xml_path);
 429          }
 430
 431          matched = sscanf(line, "  CTL: 0x%08x\n", &reg);
 432          if (matched == 1) {
 433             print_register(spec,
 434                            register_name_from_ring(ctl_registers,
 435                                                    ARRAY_SIZE(ctl_registers),
 436                                                    ring_name), reg);
 437          }
 438
 439          matched = sscanf(line, "  HEAD: 0x%08x\n", &reg);
 440          if (matched == 1)
 441             print_head(reg);
 442
 443          matched = sscanf(line, "  ACTHD: 0x%08x\n", &reg);
 444          if (matched == 1) {
 445             print_register(spec,
 446                            register_name_from_ring(acthd_registers,
 447                                                    ARRAY_SIZE(acthd_registers),
 448                                                    ring_name), reg);
 449          }
 450
 451          matched = sscanf(line, "  PGTBL_ER: 0x%08x\n", &reg);
 452          if (matched == 1 && reg)
 453             print_pgtbl_err(reg, &devinfo);
 454
 455          matched = sscanf(line, "  ERROR: 0x%08x\n", &reg);
 456          if (matched == 1 && reg) {
 457             print_register(spec, "GFX_ARB_ERROR_RPT", reg);
 458          }
 459
 460          matched = sscanf(line, "  INSTDONE: 0x%08x\n", &reg);
 461          if (matched == 1) {
 462             const char *reg_name =
 463                instdone_register_for_ring(&devinfo, ring_name);
 464             if (reg_name)
 465                print_register(spec, reg_name, reg);
 466          }
 467
 468          matched = sscanf(line, "  INSTDONE1: 0x%08x\n", &reg);
 469          if (matched == 1)
 470             print_register(spec, "INSTDONE_1", reg);
 471
 472          matched = sscanf(line, "  fence[%i] = %Lx\n", &reg, &fence);
 473          if (matched == 2)
 474             print_fence(&devinfo, fence);
 475
 476          matched = sscanf(line, "  FAULT_REG: 0x%08x\n", &reg);
 477          if (matched == 1 && reg) {
 478             const char *reg_name =
 479                register_name_from_ring(fault_registers,
 480                                        ARRAY_SIZE(fault_registers),
 481                                        ring_name);
 482             if (reg_name == NULL)
 483                reg_name = "FAULT_REG";
 484             print_register(spec, reg_name, reg);
 485          }
 486
 487          matched = sscanf(line, "  FAULT_TLB_DATA: 0x%08x 0x%08x\n", &reg, &reg2);
 488          if (matched == 2)
 489             print_fault_data(&devinfo, reg, reg2);
 490
 491          continue;
 492       }
 493    }
 494
 495    free(line);
 496    free(ring_name);
 497
 498    enum gen_batch_decode_flags batch_flags = 0;
 499    if (option_color == COLOR_ALWAYS)
 500       batch_flags |= GEN_BATCH_DECODE_IN_COLOR;
 501    if (option_full_decode)
 502       batch_flags |= GEN_BATCH_DECODE_FULL;
 503    if (option_print_offsets)
 504       batch_flags |= GEN_BATCH_DECODE_OFFSETS;
 505    batch_flags |= GEN_BATCH_DECODE_FLOATS;
 506
 507    struct gen_batch_decode_ctx batch_ctx;
 508    gen_batch_decode_ctx_init(&batch_ctx, &devinfo, stdout, batch_flags,
 509                              xml_path, get_gen_batch_bo, NULL);
 510
 511
 512    for (int s = 0; s < sect_num; s++) {
 513       printf("--- %s (%s) at 0x%08x %08x\n",
 514              sections[s].buffer_name, sections[s].ring_name,
 515              (unsigned) (sections[s].gtt_offset >> 32),
 516              (unsigned) sections[s].gtt_offset);
 517
 518       if (strcmp(sections[s].buffer_name, "batch buffer") == 0 ||
 519           strcmp(sections[s].buffer_name, "ring buffer") == 0 ||
 520           strcmp(sections[s].buffer_name, "HW Context") == 0) {
 521          gen_print_batch(&batch_ctx, sections[s].data, sections[s].count,
 522                          sections[s].gtt_offset);
 523       }
 524    }
 525
 526    gen_batch_decode_ctx_finish(&batch_ctx);
 527
 528    for (int s = 0; s < sect_num; s++) {
 529       free(sections[s].ring_name);
 530       free(sections[s].data);
 531    }
 532 }
 533
 534 static void
 535 setup_pager(void)
 536 {
 537    int fds[2];
 538    pid_t pid;
 539
 540    if (!isatty(1))
 541       return;
 542
 543    if (pipe(fds) == -1)
 544       return;
 545
 546    pid = fork();
 547    if (pid == -1)
 548       return;
 549
 550    if (pid == 0) {
 551       close(fds[1]);
 552       dup2(fds[0], 0);
 553       execlp("less", "less", "-FRSi", NULL);
 554    }
 555
 556    close(fds[0]);
 557    dup2(fds[1], 1);
 558    close(fds[1]);
 559 }
 560
 561 static void
 562 print_help(const char *progname, FILE *file)
 563 {
 564    fprintf(file,
 565            "Usage: %s [OPTION]... [FILE]\n"
 566            "Parse an Intel GPU i915_error_state.\n"
 567            "With no FILE, debugfs-dri-directory is probed for in /debug and \n"
 568            "/sys/kernel/debug.  Otherwise, it may be specified. If a file is given,\n"
 569            "it is parsed as an GPU dump in the format of /debug/dri/0/i915_error_state.\n\n"
 570            "      --help          display this help and exit\n"
 571            "      --headers       decode only command headers\n"
 572            "      --color[=WHEN]  colorize the output; WHEN can be 'auto' (default\n"
 573            "                        if omitted), 'always', or 'never'\n"
 574            "      --no-pager      don't launch pager\n"
 575            "      --no-offsets    don't print instruction offsets\n"
 576            "      --xml=DIR       load hardware xml description from directory DIR\n",
 577            progname);
 578 }
 579
 580 int
 581 main(int argc, char *argv[])
 582 {
 583    FILE *file;
 584    const char *path;
 585    struct stat st;
 586    int c, i, error;
 587    bool help = false, pager = true;
 588    const struct option aubinator_opts[] = {
 589       { "help",       no_argument,       (int *) &help,                 true },
 590       { "no-pager",   no_argument,       (int *) &pager,                false },
 591       { "no-offsets", no_argument,       (int *) &option_print_offsets, false },
 592       { "headers",    no_argument,       (int *) &option_full_decode,   false },
 593       { "color",      required_argument, NULL,                          'c' },
 594       { "xml",        required_argument, NULL,                          'x' },
 595       { NULL,         0,                 NULL,                          0 }
 596    };
 597
 598    i = 0;
 599    while ((c = getopt_long(argc, argv, "", aubinator_opts, &i)) != -1) {
 600       switch (c) {
 601       case 'c':
 602          if (optarg == NULL || strcmp(optarg, "always") == 0)
 603             option_color = COLOR_ALWAYS;
 604          else if (strcmp(optarg, "never") == 0)
 605             option_color = COLOR_NEVER;
 606          else if (strcmp(optarg, "auto") == 0)
 607             option_color = COLOR_AUTO;
 608          else {
 609             fprintf(stderr, "invalid value for --color: %s", optarg);
 610             exit(EXIT_FAILURE);
 611          }
 612          break;
 613       case 'x':
 614          xml_path = strdup(optarg);
 615          break;
 616       default:
 617          break;
 618       }
 619    }
 620
 621    if (help || argc == 1) {
 622       print_help(argv[0], stderr);
 623       exit(EXIT_SUCCESS);
 624    }
 625
 626    if (optind >= argc) {
 627       if (isatty(0)) {
 628          path = "/sys/class/drm/card0/error";
 629          error = stat(path, &st);
 630          if (error != 0) {
 631             path = "/debug/dri";
 632             error = stat(path, &st);
 633          }
 634          if (error != 0) {
 635             path = "/sys/kernel/debug/dri";
 636             error = stat(path, &st);
 637          }
 638          if (error != 0) {
 639             errx(1,
 640                  "Couldn't find i915 debugfs directory.\n\n"
 641                  "Is debugfs mounted? You might try mounting it with a command such as:\n\n"
 642                  "\tsudo mount -t debugfs debugfs /sys/kernel/debug\n");
 643          }
 644       } else {
 645          read_data_file(stdin);
 646          exit(EXIT_SUCCESS);
 647       }
 648    } else {
 649       path = argv[optind];
 650       error = stat(path, &st);
 651       if (error != 0) {
 652          fprintf(stderr, "Error opening %s: %s\n",
 653                  path, strerror(errno));
 654          exit(EXIT_FAILURE);
 655       }
 656    }
 657
 658    if (option_color == COLOR_AUTO)
 659       option_color = isatty(1) ? COLOR_ALWAYS : COLOR_NEVER;
 660
 661    if (isatty(1) && pager)
 662       setup_pager();
 663
 664    if (S_ISDIR(st.st_mode)) {
 665       int ret;
 666       char *filename;
 667
 668       ret = asprintf(&filename, "%s/i915_error_state", path);
 669       assert(ret > 0);
 670       file = fopen(filename, "r");
 671       if (!file) {
 672          int minor;
 673          free(filename);
 674          for (minor = 0; minor < 64; minor++) {
 675             ret = asprintf(&filename, "%s/%d/i915_error_state", path, minor);
 676             assert(ret > 0);
 677
 678             file = fopen(filename, "r");
 679             if (file)
 680                break;
 681
 682             free(filename);
 683          }
 684       }
 685       if (!file) {
 686          fprintf(stderr, "Failed to find i915_error_state beneath %s\n",
 687                  path);
 688          return EXIT_FAILURE;
 689       }
 690    } else {
 691       file = fopen(path, "r");
 692       if (!file) {
 693          fprintf(stderr, "Failed to open %s: %s\n",
 694                  path, strerror(errno));
 695          return EXIT_FAILURE;
 696       }
 697    }
 698
 699    read_data_file(file);
 700    fclose(file);
 701
 702    /* close the stdout which is opened to write the output */
 703    fflush(stdout);
 704    close(1);
 705    wait(NULL);
 706
 707    if (xml_path)
 708       free(xml_path);
 709
 710    return EXIT_SUCCESS;
 711 }
 712
 713 /* vim: set ts=8 sw=8 tw=0 cino=:0,(0 noet :*/