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_all_bb = false;
  55 static bool option_print_offsets = true;
  56 static enum { COLOR_AUTO, COLOR_ALWAYS, COLOR_NEVER } option_color;
  57 static char *xml_path = NULL;
  58
  59 static uint32_t
  60 print_head(unsigned int reg)
  61 {
  62    printf("    head = 0x%08x, wraps = %d\n", reg & (0x7ffff<<2), reg >> 21);
  63    return reg & (0x7ffff<<2);
  64 }
  65
  66 static void
  67 print_register(struct gen_spec *spec, const char *name, uint32_t reg)
  68 {
  69    struct gen_group *reg_spec =
  70       name ? gen_spec_find_register_by_name(spec, name) : NULL;
  71
  72    if (reg_spec) {
  73       gen_print_group(stdout, reg_spec, 0, &reg, 0,
  74                       option_color == COLOR_ALWAYS);
  75    }
  76 }
  77
  78 struct ring_register_mapping {
  79    enum drm_i915_gem_engine_class ring_class;
  80    unsigned ring_instance;
  81    const char *register_name;
  82 };
  83
  84 static const struct ring_register_mapping acthd_registers[] = {
  85    { I915_ENGINE_CLASS_COPY, 0, "BCS_ACTHD_UDW" },
  86    { I915_ENGINE_CLASS_VIDEO, 0, "VCS_ACTHD_UDW" },
  87    { I915_ENGINE_CLASS_VIDEO, 1, "VCS2_ACTHD_UDW" },
  88    { I915_ENGINE_CLASS_RENDER, 0, "ACTHD_UDW" },
  89    { I915_ENGINE_CLASS_VIDEO_ENHANCE, 0, "VECS_ACTHD_UDW" },
  90 };
  91
  92 static const struct ring_register_mapping ctl_registers[] = {
  93    { I915_ENGINE_CLASS_COPY, 0, "BCS_RING_BUFFER_CTL" },
  94    { I915_ENGINE_CLASS_VIDEO, 0, "VCS_RING_BUFFER_CTL" },
  95    { I915_ENGINE_CLASS_VIDEO, 1, "VCS2_RING_BUFFER_CTL" },
  96    { I915_ENGINE_CLASS_RENDER, 0, "RCS_RING_BUFFER_CTL" },
  97    { I915_ENGINE_CLASS_VIDEO_ENHANCE, 0,  "VECS_RING_BUFFER_CTL" },
  98 };
  99
 100 static const struct ring_register_mapping fault_registers[] = {
 101    { I915_ENGINE_CLASS_COPY, 0, "BCS_FAULT_REG" },
 102    { I915_ENGINE_CLASS_VIDEO, 0, "VCS_FAULT_REG" },
 103    { I915_ENGINE_CLASS_RENDER, 0, "RCS_FAULT_REG" },
 104    { I915_ENGINE_CLASS_VIDEO_ENHANCE, 0, "VECS_FAULT_REG" },
 105 };
 106
 107 static int ring_name_to_class(const char *ring_name,
 108                               enum drm_i915_gem_engine_class *class)
 109 {
 110    static const char *class_names[] = {
 111       [I915_ENGINE_CLASS_RENDER] = "rcs",
 112       [I915_ENGINE_CLASS_COPY] = "bcs",
 113       [I915_ENGINE_CLASS_VIDEO] = "vcs",
 114       [I915_ENGINE_CLASS_VIDEO_ENHANCE] = "vecs",
 115    };
 116    for (size_t i = 0; i < ARRAY_SIZE(class_names); i++) {
 117       if (strncmp(ring_name, class_names[i], strlen(class_names[i])))
 118          continue;
 119
 120       *class = i;
 121       return atoi(ring_name + strlen(class_names[i]));
 122    }
 123
 124    static const struct {
 125       const char *name;
 126       unsigned int class;
 127       int instance;
 128    } legacy_names[] = {
 129       { "render", I915_ENGINE_CLASS_RENDER, 0 },
 130       { "blt", I915_ENGINE_CLASS_COPY, 0 },
 131       { "bsd", I915_ENGINE_CLASS_VIDEO, 0 },
 132       { "bsd2", I915_ENGINE_CLASS_VIDEO, 1 },
 133       { "vebox", I915_ENGINE_CLASS_VIDEO_ENHANCE, 0 },
 134    };
 135    for (size_t i = 0; i < ARRAY_SIZE(legacy_names); i++) {
 136       if (strcmp(ring_name, legacy_names[i].name))
 137          continue;
 138
 139       *class = legacy_names[i].class;
 140       return legacy_names[i].instance;
 141    }
 142
 143    return -1;
 144 }
 145
 146 static const char *
 147 register_name_from_ring(const struct ring_register_mapping *mapping,
 148                         unsigned nb_mapping,
 149                         const char *ring_name)
 150 {
 151    enum drm_i915_gem_engine_class class;
 152    int instance;
 153
 154    instance = ring_name_to_class(ring_name, &class);
 155    if (instance < 0)
 156       return NULL;
 157
 158    for (unsigned i = 0; i < nb_mapping; i++) {
 159       if (mapping[i].ring_class == class &&
 160           mapping[i].ring_instance == instance)
 161          return mapping[i].register_name;
 162    }
 163    return NULL;
 164 }
 165
 166 static const char *
 167 instdone_register_for_ring(const struct gen_device_info *devinfo,
 168                            const char *ring_name)
 169 {
 170    enum drm_i915_gem_engine_class class;
 171    int instance;
 172
 173    instance = ring_name_to_class(ring_name, &class);
 174    if (instance < 0)
 175       return NULL;
 176
 177    switch (class) {
 178    case I915_ENGINE_CLASS_RENDER:
 179       if (devinfo->gen == 6)
 180          return "INSTDONE_2";
 181       else
 182          return "INSTDONE_1";
 183
 184    case I915_ENGINE_CLASS_COPY:
 185       return "BCS_INSTDONE";
 186
 187    case I915_ENGINE_CLASS_VIDEO:
 188       switch (instance) {
 189       case 0:
 190          return "VCS_INSTDONE";
 191       case 1:
 192          return "VCS2_INSTDONE";
 193       default:
 194          return NULL;
 195       }
 196
 197    case I915_ENGINE_CLASS_VIDEO_ENHANCE:
 198       return "VECS_INSTDONE";
 199
 200    default:
 201       return NULL;
 202    }
 203
 204    return NULL;
 205 }
 206
 207 static void
 208 print_pgtbl_err(unsigned int reg, struct gen_device_info *devinfo)
 209 {
 210    if (reg & (1 << 26))
 211       printf("    Invalid Sampler Cache GTT entry\n");
 212    if (reg & (1 << 24))
 213       printf("    Invalid Render Cache GTT entry\n");
 214    if (reg & (1 << 23))
 215       printf("    Invalid Instruction/State Cache GTT entry\n");
 216    if (reg & (1 << 22))
 217       printf("    There is no ROC, this cannot occur!\n");
 218    if (reg & (1 << 21))
 219       printf("    Invalid GTT entry during Vertex Fetch\n");
 220    if (reg & (1 << 20))
 221       printf("    Invalid GTT entry during Command Fetch\n");
 222    if (reg & (1 << 19))
 223       printf("    Invalid GTT entry during CS\n");
 224    if (reg & (1 << 18))
 225       printf("    Invalid GTT entry during Cursor Fetch\n");
 226    if (reg & (1 << 17))
 227       printf("    Invalid GTT entry during Overlay Fetch\n");
 228    if (reg & (1 << 8))
 229       printf("    Invalid GTT entry during Display B Fetch\n");
 230    if (reg & (1 << 4))
 231       printf("    Invalid GTT entry during Display A Fetch\n");
 232    if (reg & (1 << 1))
 233       printf("    Valid PTE references illegal memory\n");
 234    if (reg & (1 << 0))
 235       printf("    Invalid GTT entry during fetch for host\n");
 236 }
 237
 238 static void
 239 print_snb_fence(struct gen_device_info *devinfo, uint64_t fence)
 240 {
 241    printf("    %svalid, %c-tiled, pitch: %i, start: 0x%08x, size: %u\n",
 242           fence & 1 ? "" : "in",
 243           fence & (1<<1) ? 'y' : 'x',
 244           (int)(((fence>>32)&0xfff)+1)*128,
 245           (uint32_t)fence & 0xfffff000,
 246           (uint32_t)(((fence>>32)&0xfffff000) - (fence&0xfffff000) + 4096));
 247 }
 248
 249 static void
 250 print_i965_fence(struct gen_device_info *devinfo, uint64_t fence)
 251 {
 252    printf("    %svalid, %c-tiled, pitch: %i, start: 0x%08x, size: %u\n",
 253           fence & 1 ? "" : "in",
 254           fence & (1<<1) ? 'y' : 'x',
 255           (int)(((fence>>2)&0x1ff)+1)*128,
 256           (uint32_t)fence & 0xfffff000,
 257           (uint32_t)(((fence>>32)&0xfffff000) - (fence&0xfffff000) + 4096));
 258 }
 259
 260 static void
 261 print_fence(struct gen_device_info *devinfo, uint64_t fence)
 262 {
 263    if (devinfo->gen == 6 || devinfo->gen == 7) {
 264       return print_snb_fence(devinfo, fence);
 265    } else if (devinfo->gen == 4 || devinfo->gen == 5) {
 266       return print_i965_fence(devinfo, fence);
 267    }
 268 }
 269
 270 static void
 271 print_fault_data(struct gen_device_info *devinfo, uint32_t data1, uint32_t data0)
 272 {
 273    uint64_t address;
 274
 275    if (devinfo->gen < 8)
 276       return;
 277
 278    address = ((uint64_t)(data0) << 12) | ((uint64_t)data1 & 0xf) << 44;
 279    printf("    Address 0x%016" PRIx64 " %s\n", address,
 280           data1 & (1 << 4) ? "GGTT" : "PPGTT");
 281 }
 282
 283 #define CSI "\e["
 284 #define NORMAL       CSI "0m"
 285
 286 struct section {
 287    uint64_t gtt_offset;
 288    char *ring_name;
 289    const char *buffer_name;
 290    uint32_t *data;
 291    int dword_count;
 292 };
 293
 294 #define MAX_SECTIONS 256
 295 static unsigned num_sections;
 296 static struct section sections[MAX_SECTIONS];
 297
 298 static int zlib_inflate(uint32_t **ptr, int len)
 299 {
 300    struct z_stream_s zstream;
 301    void *out;
 302    const uint32_t out_size = 128*4096;  /* approximate obj size */
 303
 304    memset(&zstream, 0, sizeof(zstream));
 305
 306    zstream.next_in = (unsigned char *)*ptr;
 307    zstream.avail_in = 4*len;
 308
 309    if (inflateInit(&zstream) != Z_OK)
 310       return 0;
 311
 312    out = malloc(out_size);
 313    zstream.next_out = out;
 314    zstream.avail_out = out_size;
 315
 316    do {
 317       switch (inflate(&zstream, Z_SYNC_FLUSH)) {
 318       case Z_STREAM_END:
 319          goto end;
 320       case Z_OK:
 321          break;
 322       default:
 323          inflateEnd(&zstream);
 324          return 0;
 325       }
 326
 327       if (zstream.avail_out)
 328          break;
 329
 330       out = realloc(out, 2*zstream.total_out);
 331       if (out == NULL) {
 332          inflateEnd(&zstream);
 333          return 0;
 334       }
 335
 336       zstream.next_out = (unsigned char *)out + zstream.total_out;
 337       zstream.avail_out = zstream.total_out;
 338    } while (1);
 339  end:
 340    inflateEnd(&zstream);
 341    free(*ptr);
 342    *ptr = out;
 343    return zstream.total_out / 4;
 344 }
 345
 346 static int ascii85_decode(const char *in, uint32_t **out, bool inflate)
 347 {
 348    int len = 0, size = 1024;
 349
 350    *out = realloc(*out, sizeof(uint32_t)*size);
 351    if (*out == NULL)
 352       return 0;
 353
 354    while (*in >= '!' && *in <= 'z') {
 355       uint32_t v = 0;
 356
 357       if (len == size) {
 358          size *= 2;
 359          *out = realloc(*out, sizeof(uint32_t)*size);
 360          if (*out == NULL)
 361             return 0;
 362       }
 363
 364       if (*in == 'z') {
 365          in++;
 366       } else {
 367          v += in[0] - 33; v *= 85;
 368          v += in[1] - 33; v *= 85;
 369          v += in[2] - 33; v *= 85;
 370          v += in[3] - 33; v *= 85;
 371          v += in[4] - 33;
 372          in += 5;
 373       }
 374       (*out)[len++] = v;
 375    }
 376
 377    if (!inflate)
 378       return len;
 379
 380    return zlib_inflate(out, len);
 381 }
 382
 383 static struct gen_batch_decode_bo
 384 get_gen_batch_bo(void *user_data, bool ppgtt, uint64_t address)
 385 {
 386    for (int s = 0; s < num_sections; s++) {
 387       if (sections[s].gtt_offset <= address &&
 388           address < sections[s].gtt_offset + sections[s].dword_count * 4) {
 389          return (struct gen_batch_decode_bo) {
 390             .addr = sections[s].gtt_offset,
 391             .map = sections[s].data,
 392             .size = sections[s].dword_count * 4,
 393          };
 394       }
 395    }
 396
 397    return (struct gen_batch_decode_bo) { .map = NULL };
 398 }
 399
 400 static void
 401 read_data_file(FILE *file)
 402 {
 403    struct gen_spec *spec = NULL;
 404    long long unsigned fence;
 405    int matched;
 406    char *line = NULL;
 407    size_t line_size;
 408    uint32_t offset, value;
 409    char *ring_name = NULL;
 410    struct gen_device_info devinfo;
 411
 412    while (getline(&line, &line_size, file) > 0) {
 413       char *new_ring_name = NULL;
 414       char *dashes;
 415
 416       if (sscanf(line, "%m[^ ] command stream\n", &new_ring_name) > 0) {
 417          free(ring_name);
 418          ring_name = new_ring_name;
 419       }
 420
 421       if (line[0] == ':' || line[0] == '~') {
 422          uint32_t *data = NULL;
 423          int dword_count = ascii85_decode(line+1, &data, line[0] == ':');
 424          if (dword_count == 0) {
 425             fprintf(stderr, "ASCII85 decode failed.\n");
 426             exit(EXIT_FAILURE);
 427          }
 428          assert(num_sections < MAX_SECTIONS);
 429          sections[num_sections].data = data;
 430          sections[num_sections].dword_count = dword_count;
 431          num_sections++;
 432          continue;
 433       }
 434
 435       dashes = strstr(line, "---");
 436       if (dashes) {
 437          const struct {
 438             const char *match;
 439             const char *name;
 440          } buffers[] = {
 441             { "ringbuffer", "ring buffer" },
 442             { "gtt_offset", "batch buffer" },
 443             { "hw context", "HW Context" },
 444             { "hw status", "HW status" },
 445             { "wa context", "WA context" },
 446             { "wa batchbuffer", "WA batch" },
 447             { "NULL context", "Kernel context" },
 448             { "user", "user" },
 449             { "semaphores", "semaphores", },
 450             { "guc log buffer", "GuC log", },
 451             { NULL, "unknown" },
 452          }, *b;
 453
 454          free(ring_name);
 455          ring_name = malloc(dashes - line);
 456          strncpy(ring_name, line, dashes - line);
 457          ring_name[dashes - line - 1] = '\0';
 458
 459          dashes += 4;
 460          for (b = buffers; b->match; b++) {
 461             if (strncasecmp(dashes, b->match, strlen(b->match)) == 0)
 462                break;
 463          }
 464
 465          assert(num_sections < MAX_SECTIONS);
 466          sections[num_sections].buffer_name = b->name;
 467          sections[num_sections].ring_name = strdup(ring_name);
 468
 469          uint32_t hi, lo;
 470          dashes = strchr(dashes, '=');
 471          if (dashes && sscanf(dashes, "= 0x%08x %08x\n", &hi, &lo))
 472             sections[num_sections].gtt_offset = ((uint64_t) hi) << 32 | lo;
 473
 474          continue;
 475       }
 476
 477       matched = sscanf(line, "%08x : %08x", &offset, &value);
 478       if (matched != 2) {
 479          uint32_t reg, reg2;
 480
 481          /* display reg section is after the ringbuffers, don't mix them */
 482          printf("%s", line);
 483
 484          matched = sscanf(line, "PCI ID: 0x%04x\n", &reg);
 485          if (matched == 0)
 486             matched = sscanf(line, " PCI ID: 0x%04x\n", &reg);
 487          if (matched == 0) {
 488             const char *pci_id_start = strstr(line, "PCI ID");
 489             if (pci_id_start)
 490                matched = sscanf(pci_id_start, "PCI ID: 0x%04x\n", &reg);
 491          }
 492          if (matched == 1) {
 493             if (!gen_get_device_info(reg, &devinfo)) {
 494                printf("Unable to identify devid=%x\n", reg);
 495                exit(EXIT_FAILURE);
 496             }
 497
 498             printf("Detected GEN%i chipset\n", devinfo.gen);
 499
 500             if (xml_path == NULL)
 501                spec = gen_spec_load(&devinfo);
 502             else
 503                spec = gen_spec_load_from_path(&devinfo, xml_path);
 504          }
 505
 506          matched = sscanf(line, "  CTL: 0x%08x\n", &reg);
 507          if (matched == 1) {
 508             print_register(spec,
 509                            register_name_from_ring(ctl_registers,
 510                                                    ARRAY_SIZE(ctl_registers),
 511                                                    ring_name), reg);
 512          }
 513
 514          matched = sscanf(line, "  HEAD: 0x%08x\n", &reg);
 515          if (matched == 1)
 516             print_head(reg);
 517
 518          matched = sscanf(line, "  ACTHD: 0x%08x\n", &reg);
 519          if (matched == 1) {
 520             print_register(spec,
 521                            register_name_from_ring(acthd_registers,
 522                                                    ARRAY_SIZE(acthd_registers),
 523                                                    ring_name), reg);
 524          }
 525
 526          matched = sscanf(line, "  PGTBL_ER: 0x%08x\n", &reg);
 527          if (matched == 1 && reg)
 528             print_pgtbl_err(reg, &devinfo);
 529
 530          matched = sscanf(line, "  ERROR: 0x%08x\n", &reg);
 531          if (matched == 1 && reg) {
 532             print_register(spec, "GFX_ARB_ERROR_RPT", reg);
 533          }
 534
 535          matched = sscanf(line, "  INSTDONE: 0x%08x\n", &reg);
 536          if (matched == 1) {
 537             const char *reg_name =
 538                instdone_register_for_ring(&devinfo, ring_name);
 539             if (reg_name)
 540                print_register(spec, reg_name, reg);
 541          }
 542
 543          matched = sscanf(line, "  SC_INSTDONE: 0x%08x\n", &reg);
 544          if (matched == 1)
 545             print_register(spec, "SC_INSTDONE", reg);
 546
 547          matched = sscanf(line, "  SAMPLER_INSTDONE[%*d][%*d]: 0x%08x\n", &reg);
 548          if (matched == 1)
 549             print_register(spec, "SAMPLER_INSTDONE", reg);
 550
 551          matched = sscanf(line, "  ROW_INSTDONE[%*d][%*d]: 0x%08x\n", &reg);
 552          if (matched == 1)
 553             print_register(spec, "ROW_INSTDONE", reg);
 554
 555          matched = sscanf(line, "  INSTDONE1: 0x%08x\n", &reg);
 556          if (matched == 1)
 557             print_register(spec, "INSTDONE_1", reg);
 558
 559          matched = sscanf(line, "  fence[%i] = %Lx\n", &reg, &fence);
 560          if (matched == 2)
 561             print_fence(&devinfo, fence);
 562
 563          matched = sscanf(line, "  FAULT_REG: 0x%08x\n", &reg);
 564          if (matched == 1 && reg) {
 565             const char *reg_name =
 566                register_name_from_ring(fault_registers,
 567                                        ARRAY_SIZE(fault_registers),
 568                                        ring_name);
 569             if (reg_name == NULL)
 570                reg_name = "FAULT_REG";
 571             print_register(spec, reg_name, reg);
 572          }
 573
 574          matched = sscanf(line, "  FAULT_TLB_DATA: 0x%08x 0x%08x\n", &reg, &reg2);
 575          if (matched == 2)
 576             print_fault_data(&devinfo, reg, reg2);
 577
 578          continue;
 579       }
 580    }
 581
 582    free(line);
 583    free(ring_name);
 584
 585    enum gen_batch_decode_flags batch_flags = 0;
 586    if (option_color == COLOR_ALWAYS)
 587       batch_flags |= GEN_BATCH_DECODE_IN_COLOR;
 588    if (option_full_decode)
 589       batch_flags |= GEN_BATCH_DECODE_FULL;
 590    if (option_print_offsets)
 591       batch_flags |= GEN_BATCH_DECODE_OFFSETS;
 592    batch_flags |= GEN_BATCH_DECODE_FLOATS;
 593
 594    struct gen_batch_decode_ctx batch_ctx;
 595    gen_batch_decode_ctx_init(&batch_ctx, &devinfo, stdout, batch_flags,
 596                              xml_path, get_gen_batch_bo, NULL, NULL);
 597
 598
 599    for (int s = 0; s < num_sections; s++) {
 600       enum drm_i915_gem_engine_class class;
 601       ring_name_to_class(sections[s].ring_name, &class);
 602
 603       printf("--- %s (%s) at 0x%08x %08x\n",
 604              sections[s].buffer_name, sections[s].ring_name,
 605              (unsigned) (sections[s].gtt_offset >> 32),
 606              (unsigned) sections[s].gtt_offset);
 607
 608       if (option_print_all_bb ||
 609           strcmp(sections[s].buffer_name, "batch buffer") == 0 ||
 610           strcmp(sections[s].buffer_name, "ring buffer") == 0 ||
 611           strcmp(sections[s].buffer_name, "HW Context") == 0) {
 612          batch_ctx.engine = class;
 613          gen_print_batch(&batch_ctx, sections[s].data,
 614                          sections[s].dword_count * 4,
 615                          sections[s].gtt_offset, false);
 616       }
 617    }
 618
 619    gen_batch_decode_ctx_finish(&batch_ctx);
 620
 621    for (int s = 0; s < num_sections; s++) {
 622       free(sections[s].ring_name);
 623       free(sections[s].data);
 624    }
 625 }
 626
 627 static void
 628 setup_pager(void)
 629 {
 630    int fds[2];
 631    pid_t pid;
 632
 633    if (!isatty(1))
 634       return;
 635
 636    if (pipe(fds) == -1)
 637       return;
 638
 639    pid = fork();
 640    if (pid == -1)
 641       return;
 642
 643    if (pid == 0) {
 644       close(fds[1]);
 645       dup2(fds[0], 0);
 646       execlp("less", "less", "-FRSi", NULL);
 647    }
 648
 649    close(fds[0]);
 650    dup2(fds[1], 1);
 651    close(fds[1]);
 652 }
 653
 654 static void
 655 print_help(const char *progname, FILE *file)
 656 {
 657    fprintf(file,
 658            "Usage: %s [OPTION]... [FILE]\n"
 659            "Parse an Intel GPU i915_error_state.\n"
 660            "With no FILE, debugfs-dri-directory is probed for in /debug and \n"
 661            "/sys/kernel/debug.  Otherwise, it may be specified. If a file is given,\n"
 662            "it is parsed as an GPU dump in the format of /debug/dri/0/i915_error_state.\n\n"
 663            "      --help          display this help and exit\n"
 664            "      --headers       decode only command headers\n"
 665            "      --color[=WHEN]  colorize the output; WHEN can be 'auto' (default\n"
 666            "                        if omitted), 'always', or 'never'\n"
 667            "      --no-pager      don't launch pager\n"
 668            "      --no-offsets    don't print instruction offsets\n"
 669            "      --xml=DIR       load hardware xml description from directory DIR\n"
 670            "      --all-bb        print out all batchbuffers\n",
 671            progname);
 672 }
 673
 674 int
 675 main(int argc, char *argv[])
 676 {
 677    FILE *file;
 678    const char *path;
 679    struct stat st;
 680    int c, i, error;
 681    bool help = false, pager = true;
 682    const struct option aubinator_opts[] = {
 683       { "help",       no_argument,       (int *) &help,                 true },
 684       { "no-pager",   no_argument,       (int *) &pager,                false },
 685       { "no-offsets", no_argument,       (int *) &option_print_offsets, false },
 686       { "headers",    no_argument,       (int *) &option_full_decode,   false },
 687       { "color",      required_argument, NULL,                          'c' },
 688       { "xml",        required_argument, NULL,                          'x' },
 689       { "all-bb",     no_argument,       (int *) &option_print_all_bb,  true },
 690       { NULL,         0,                 NULL,                          0 }
 691    };
 692
 693    i = 0;
 694    while ((c = getopt_long(argc, argv, "", aubinator_opts, &i)) != -1) {
 695       switch (c) {
 696       case 'c':
 697          if (optarg == NULL || strcmp(optarg, "always") == 0)
 698             option_color = COLOR_ALWAYS;
 699          else if (strcmp(optarg, "never") == 0)
 700             option_color = COLOR_NEVER;
 701          else if (strcmp(optarg, "auto") == 0)
 702             option_color = COLOR_AUTO;
 703          else {
 704             fprintf(stderr, "invalid value for --color: %s", optarg);
 705             exit(EXIT_FAILURE);
 706          }
 707          break;
 708       case 'x':
 709          xml_path = strdup(optarg);
 710          break;
 711       default:
 712          break;
 713       }
 714    }
 715
 716    if (help || argc == 1) {
 717       print_help(argv[0], stderr);
 718       exit(EXIT_SUCCESS);
 719    }
 720
 721    if (optind >= argc) {
 722       if (isatty(0)) {
 723          path = "/sys/class/drm/card0/error";
 724          error = stat(path, &st);
 725          if (error != 0) {
 726             path = "/debug/dri";
 727             error = stat(path, &st);
 728          }
 729          if (error != 0) {
 730             path = "/sys/kernel/debug/dri";
 731             error = stat(path, &st);
 732          }
 733          if (error != 0) {
 734             errx(1,
 735                  "Couldn't find i915 debugfs directory.\n\n"
 736                  "Is debugfs mounted? You might try mounting it with a command such as:\n\n"
 737                  "\tsudo mount -t debugfs debugfs /sys/kernel/debug\n");
 738          }
 739       } else {
 740          read_data_file(stdin);
 741          exit(EXIT_SUCCESS);
 742       }
 743    } else {
 744       path = argv[optind];
 745       error = stat(path, &st);
 746       if (error != 0) {
 747          fprintf(stderr, "Error opening %s: %s\n",
 748                  path, strerror(errno));
 749          exit(EXIT_FAILURE);
 750       }
 751    }
 752
 753    if (option_color == COLOR_AUTO)
 754       option_color = isatty(1) ? COLOR_ALWAYS : COLOR_NEVER;
 755
 756    if (isatty(1) && pager)
 757       setup_pager();
 758
 759    if (S_ISDIR(st.st_mode)) {
 760       ASSERTED int ret;
 761       char *filename;
 762
 763       ret = asprintf(&filename, "%s/i915_error_state", path);
 764       assert(ret > 0);
 765       file = fopen(filename, "r");
 766       if (!file) {
 767          int minor;
 768          free(filename);
 769          for (minor = 0; minor < 64; minor++) {
 770             ret = asprintf(&filename, "%s/%d/i915_error_state", path, minor);
 771             assert(ret > 0);
 772
 773             file = fopen(filename, "r");
 774             if (file)
 775                break;
 776
 777             free(filename);
 778          }
 779       }
 780       if (!file) {
 781          fprintf(stderr, "Failed to find i915_error_state beneath %s\n",
 782                  path);
 783          return EXIT_FAILURE;
 784       }
 785    } else {
 786       file = fopen(path, "r");
 787       if (!file) {
 788          fprintf(stderr, "Failed to open %s: %s\n",
 789                  path, strerror(errno));
 790          return EXIT_FAILURE;
 791       }
 792    }
 793
 794    read_data_file(file);
 795    fclose(file);
 796
 797    /* close the stdout which is opened to write the output */
 798    fflush(stdout);
 799    close(1);
 800    wait(NULL);
 801
 802    if (xml_path)
 803       free(xml_path);
 804
 805    return EXIT_SUCCESS;
 806 }
 807
 808 /* vim: set ts=8 sw=8 tw=0 cino=:0,(0 noet :*/