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