1 /* 2 * Copyright (c) 2008 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 * Authors: 24 * Eric Anholt <eric@anholt.net> 25 * Keith Packard <keithp@keithp.com> 26 * Mika Kuoppala <mika.kuoppala@intel.com> 27 * 28 */ 29 30 #include <generated/utsrelease.h> 31 #include <linux/stop_machine.h> 32 #include <linux/zlib.h> 33 #include <drm/drm_print.h> 34 #include <linux/ascii85.h> 35 36 #include "i915_gpu_error.h" 37 #include "i915_drv.h" 38 39 static inline const struct intel_engine_cs * 40 engine_lookup(const struct drm_i915_private *i915, unsigned int id) 41 { 42 if (id >= I915_NUM_ENGINES) 43 return NULL; 44 45 return i915->engine[id]; 46 } 47 48 static inline const char * 49 __engine_name(const struct intel_engine_cs *engine) 50 { 51 return engine ? engine->name : ""; 52 } 53 54 static const char * 55 engine_name(const struct drm_i915_private *i915, unsigned int id) 56 { 57 return __engine_name(engine_lookup(i915, id)); 58 } 59 60 static const char *tiling_flag(int tiling) 61 { 62 switch (tiling) { 63 default: 64 case I915_TILING_NONE: return ""; 65 case I915_TILING_X: return " X"; 66 case I915_TILING_Y: return " Y"; 67 } 68 } 69 70 static const char *dirty_flag(int dirty) 71 { 72 return dirty ? " dirty" : ""; 73 } 74 75 static const char *purgeable_flag(int purgeable) 76 { 77 return purgeable ? " purgeable" : ""; 78 } 79 80 static bool __i915_error_ok(struct drm_i915_error_state_buf *e) 81 { 82 83 if (!e->err && WARN(e->bytes > (e->size - 1), "overflow")) { 84 e->err = -ENOSPC; 85 return false; 86 } 87 88 if (e->bytes == e->size - 1 || e->err) 89 return false; 90 91 return true; 92 } 93 94 static bool __i915_error_seek(struct drm_i915_error_state_buf *e, 95 unsigned len) 96 { 97 if (e->pos + len <= e->start) { 98 e->pos += len; 99 return false; 100 } 101 102 /* First vsnprintf needs to fit in its entirety for memmove */ 103 if (len >= e->size) { 104 e->err = -EIO; 105 return false; 106 } 107 108 return true; 109 } 110 111 static void __i915_error_advance(struct drm_i915_error_state_buf *e, 112 unsigned len) 113 { 114 /* If this is first printf in this window, adjust it so that 115 * start position matches start of the buffer 116 */ 117 118 if (e->pos < e->start) { 119 const size_t off = e->start - e->pos; 120 121 /* Should not happen but be paranoid */ 122 if (off > len || e->bytes) { 123 e->err = -EIO; 124 return; 125 } 126 127 memmove(e->buf, e->buf + off, len - off); 128 e->bytes = len - off; 129 e->pos = e->start; 130 return; 131 } 132 133 e->bytes += len; 134 e->pos += len; 135 } 136 137 __printf(2, 0) 138 static void i915_error_vprintf(struct drm_i915_error_state_buf *e, 139 const char *f, va_list args) 140 { 141 unsigned len; 142 143 if (!__i915_error_ok(e)) 144 return; 145 146 /* Seek the first printf which is hits start position */ 147 if (e->pos < e->start) { 148 va_list tmp; 149 150 va_copy(tmp, args); 151 len = vsnprintf(NULL, 0, f, tmp); 152 va_end(tmp); 153 154 if (!__i915_error_seek(e, len)) 155 return; 156 } 157 158 len = vsnprintf(e->buf + e->bytes, e->size - e->bytes, f, args); 159 if (len >= e->size - e->bytes) 160 len = e->size - e->bytes - 1; 161 162 __i915_error_advance(e, len); 163 } 164 165 static void i915_error_puts(struct drm_i915_error_state_buf *e, 166 const char *str) 167 { 168 unsigned len; 169 170 if (!__i915_error_ok(e)) 171 return; 172 173 len = strlen(str); 174 175 /* Seek the first printf which is hits start position */ 176 if (e->pos < e->start) { 177 if (!__i915_error_seek(e, len)) 178 return; 179 } 180 181 if (len >= e->size - e->bytes) 182 len = e->size - e->bytes - 1; 183 memcpy(e->buf + e->bytes, str, len); 184 185 __i915_error_advance(e, len); 186 } 187 188 #define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__) 189 #define err_puts(e, s) i915_error_puts(e, s) 190 191 static void __i915_printfn_error(struct drm_printer *p, struct va_format *vaf) 192 { 193 i915_error_vprintf(p->arg, vaf->fmt, *vaf->va); 194 } 195 196 static inline struct drm_printer 197 i915_error_printer(struct drm_i915_error_state_buf *e) 198 { 199 struct drm_printer p = { 200 .printfn = __i915_printfn_error, 201 .arg = e, 202 }; 203 return p; 204 } 205 206 #ifdef CONFIG_DRM_I915_COMPRESS_ERROR 207 208 struct compress { 209 struct z_stream_s zstream; 210 void *tmp; 211 }; 212 213 static bool compress_init(struct compress *c) 214 { 215 struct z_stream_s *zstream = memset(&c->zstream, 0, sizeof(c->zstream)); 216 217 zstream->workspace = 218 kmalloc(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL), 219 GFP_ATOMIC | __GFP_NOWARN); 220 if (!zstream->workspace) 221 return false; 222 223 if (zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) != Z_OK) { 224 kfree(zstream->workspace); 225 return false; 226 } 227 228 c->tmp = NULL; 229 if (i915_has_memcpy_from_wc()) 230 c->tmp = (void *)__get_free_page(GFP_ATOMIC | __GFP_NOWARN); 231 232 return true; 233 } 234 235 static void *compress_next_page(struct drm_i915_error_object *dst) 236 { 237 unsigned long page; 238 239 if (dst->page_count >= dst->num_pages) 240 return ERR_PTR(-ENOSPC); 241 242 page = __get_free_page(GFP_ATOMIC | __GFP_NOWARN); 243 if (!page) 244 return ERR_PTR(-ENOMEM); 245 246 return dst->pages[dst->page_count++] = (void *)page; 247 } 248 249 static int compress_page(struct compress *c, 250 void *src, 251 struct drm_i915_error_object *dst) 252 { 253 struct z_stream_s *zstream = &c->zstream; 254 255 zstream->next_in = src; 256 if (c->tmp && i915_memcpy_from_wc(c->tmp, src, PAGE_SIZE)) 257 zstream->next_in = c->tmp; 258 zstream->avail_in = PAGE_SIZE; 259 260 do { 261 if (zstream->avail_out == 0) { 262 zstream->next_out = compress_next_page(dst); 263 if (IS_ERR(zstream->next_out)) 264 return PTR_ERR(zstream->next_out); 265 266 zstream->avail_out = PAGE_SIZE; 267 } 268 269 if (zlib_deflate(zstream, Z_NO_FLUSH) != Z_OK) 270 return -EIO; 271 } while (zstream->avail_in); 272 273 /* Fallback to uncompressed if we increase size? */ 274 if (0 && zstream->total_out > zstream->total_in) 275 return -E2BIG; 276 277 return 0; 278 } 279 280 static int compress_flush(struct compress *c, 281 struct drm_i915_error_object *dst) 282 { 283 struct z_stream_s *zstream = &c->zstream; 284 285 do { 286 switch (zlib_deflate(zstream, Z_FINISH)) { 287 case Z_OK: /* more space requested */ 288 zstream->next_out = compress_next_page(dst); 289 if (IS_ERR(zstream->next_out)) 290 return PTR_ERR(zstream->next_out); 291 292 zstream->avail_out = PAGE_SIZE; 293 break; 294 295 case Z_STREAM_END: 296 goto end; 297 298 default: /* any error */ 299 return -EIO; 300 } 301 } while (1); 302 303 end: 304 memset(zstream->next_out, 0, zstream->avail_out); 305 dst->unused = zstream->avail_out; 306 return 0; 307 } 308 309 static void compress_fini(struct compress *c, 310 struct drm_i915_error_object *dst) 311 { 312 struct z_stream_s *zstream = &c->zstream; 313 314 zlib_deflateEnd(zstream); 315 kfree(zstream->workspace); 316 if (c->tmp) 317 free_page((unsigned long)c->tmp); 318 } 319 320 static void err_compression_marker(struct drm_i915_error_state_buf *m) 321 { 322 err_puts(m, ":"); 323 } 324 325 #else 326 327 struct compress { 328 }; 329 330 static bool compress_init(struct compress *c) 331 { 332 return true; 333 } 334 335 static int compress_page(struct compress *c, 336 void *src, 337 struct drm_i915_error_object *dst) 338 { 339 unsigned long page; 340 void *ptr; 341 342 page = __get_free_page(GFP_ATOMIC | __GFP_NOWARN); 343 if (!page) 344 return -ENOMEM; 345 346 ptr = (void *)page; 347 if (!i915_memcpy_from_wc(ptr, src, PAGE_SIZE)) 348 memcpy(ptr, src, PAGE_SIZE); 349 dst->pages[dst->page_count++] = ptr; 350 351 return 0; 352 } 353 354 static int compress_flush(struct compress *c, 355 struct drm_i915_error_object *dst) 356 { 357 return 0; 358 } 359 360 static void compress_fini(struct compress *c, 361 struct drm_i915_error_object *dst) 362 { 363 } 364 365 static void err_compression_marker(struct drm_i915_error_state_buf *m) 366 { 367 err_puts(m, "~"); 368 } 369 370 #endif 371 372 static void print_error_buffers(struct drm_i915_error_state_buf *m, 373 const char *name, 374 struct drm_i915_error_buffer *err, 375 int count) 376 { 377 err_printf(m, "%s [%d]:\n", name, count); 378 379 while (count--) { 380 err_printf(m, " %08x_%08x %8u %02x %02x %02x", 381 upper_32_bits(err->gtt_offset), 382 lower_32_bits(err->gtt_offset), 383 err->size, 384 err->read_domains, 385 err->write_domain, 386 err->wseqno); 387 err_puts(m, tiling_flag(err->tiling)); 388 err_puts(m, dirty_flag(err->dirty)); 389 err_puts(m, purgeable_flag(err->purgeable)); 390 err_puts(m, err->userptr ? " userptr" : ""); 391 err_puts(m, err->engine != -1 ? " " : ""); 392 err_puts(m, engine_name(m->i915, err->engine)); 393 err_puts(m, i915_cache_level_str(m->i915, err->cache_level)); 394 395 if (err->name) 396 err_printf(m, " (name: %d)", err->name); 397 if (err->fence_reg != I915_FENCE_REG_NONE) 398 err_printf(m, " (fence: %d)", err->fence_reg); 399 400 err_puts(m, "\n"); 401 err++; 402 } 403 } 404 405 static void error_print_instdone(struct drm_i915_error_state_buf *m, 406 const struct drm_i915_error_engine *ee) 407 { 408 int slice; 409 int subslice; 410 411 err_printf(m, " INSTDONE: 0x%08x\n", 412 ee->instdone.instdone); 413 414 if (ee->engine_id != RCS || INTEL_GEN(m->i915) <= 3) 415 return; 416 417 err_printf(m, " SC_INSTDONE: 0x%08x\n", 418 ee->instdone.slice_common); 419 420 if (INTEL_GEN(m->i915) <= 6) 421 return; 422 423 for_each_instdone_slice_subslice(m->i915, slice, subslice) 424 err_printf(m, " SAMPLER_INSTDONE[%d][%d]: 0x%08x\n", 425 slice, subslice, 426 ee->instdone.sampler[slice][subslice]); 427 428 for_each_instdone_slice_subslice(m->i915, slice, subslice) 429 err_printf(m, " ROW_INSTDONE[%d][%d]: 0x%08x\n", 430 slice, subslice, 431 ee->instdone.row[slice][subslice]); 432 } 433 434 static const char *bannable(const struct drm_i915_error_context *ctx) 435 { 436 return ctx->bannable ? "" : " (unbannable)"; 437 } 438 439 static void error_print_request(struct drm_i915_error_state_buf *m, 440 const char *prefix, 441 const struct drm_i915_error_request *erq, 442 const unsigned long epoch) 443 { 444 if (!erq->seqno) 445 return; 446 447 err_printf(m, "%s pid %d, ban score %d, seqno %8x:%08x, prio %d, emitted %dms, start %08x, head %08x, tail %08x\n", 448 prefix, erq->pid, erq->ban_score, 449 erq->context, erq->seqno, erq->sched_attr.priority, 450 jiffies_to_msecs(erq->jiffies - epoch), 451 erq->start, erq->head, erq->tail); 452 } 453 454 static void error_print_context(struct drm_i915_error_state_buf *m, 455 const char *header, 456 const struct drm_i915_error_context *ctx) 457 { 458 err_printf(m, "%s%s[%d] user_handle %d hw_id %d, prio %d, ban score %d%s guilty %d active %d\n", 459 header, ctx->comm, ctx->pid, ctx->handle, ctx->hw_id, 460 ctx->sched_attr.priority, ctx->ban_score, bannable(ctx), 461 ctx->guilty, ctx->active); 462 } 463 464 static void error_print_engine(struct drm_i915_error_state_buf *m, 465 const struct drm_i915_error_engine *ee, 466 const unsigned long epoch) 467 { 468 int n; 469 470 err_printf(m, "%s command stream:\n", 471 engine_name(m->i915, ee->engine_id)); 472 err_printf(m, " IDLE?: %s\n", yesno(ee->idle)); 473 err_printf(m, " START: 0x%08x\n", ee->start); 474 err_printf(m, " HEAD: 0x%08x [0x%08x]\n", ee->head, ee->rq_head); 475 err_printf(m, " TAIL: 0x%08x [0x%08x, 0x%08x]\n", 476 ee->tail, ee->rq_post, ee->rq_tail); 477 err_printf(m, " CTL: 0x%08x\n", ee->ctl); 478 err_printf(m, " MODE: 0x%08x\n", ee->mode); 479 err_printf(m, " HWS: 0x%08x\n", ee->hws); 480 err_printf(m, " ACTHD: 0x%08x %08x\n", 481 (u32)(ee->acthd>>32), (u32)ee->acthd); 482 err_printf(m, " IPEIR: 0x%08x\n", ee->ipeir); 483 err_printf(m, " IPEHR: 0x%08x\n", ee->ipehr); 484 485 error_print_instdone(m, ee); 486 487 if (ee->batchbuffer) { 488 u64 start = ee->batchbuffer->gtt_offset; 489 u64 end = start + ee->batchbuffer->gtt_size; 490 491 err_printf(m, " batch: [0x%08x_%08x, 0x%08x_%08x]\n", 492 upper_32_bits(start), lower_32_bits(start), 493 upper_32_bits(end), lower_32_bits(end)); 494 } 495 if (INTEL_GEN(m->i915) >= 4) { 496 err_printf(m, " BBADDR: 0x%08x_%08x\n", 497 (u32)(ee->bbaddr>>32), (u32)ee->bbaddr); 498 err_printf(m, " BB_STATE: 0x%08x\n", ee->bbstate); 499 err_printf(m, " INSTPS: 0x%08x\n", ee->instps); 500 } 501 err_printf(m, " INSTPM: 0x%08x\n", ee->instpm); 502 err_printf(m, " FADDR: 0x%08x %08x\n", upper_32_bits(ee->faddr), 503 lower_32_bits(ee->faddr)); 504 if (INTEL_GEN(m->i915) >= 6) { 505 err_printf(m, " RC PSMI: 0x%08x\n", ee->rc_psmi); 506 err_printf(m, " FAULT_REG: 0x%08x\n", ee->fault_reg); 507 err_printf(m, " SYNC_0: 0x%08x\n", 508 ee->semaphore_mboxes[0]); 509 err_printf(m, " SYNC_1: 0x%08x\n", 510 ee->semaphore_mboxes[1]); 511 if (HAS_VEBOX(m->i915)) 512 err_printf(m, " SYNC_2: 0x%08x\n", 513 ee->semaphore_mboxes[2]); 514 } 515 if (HAS_PPGTT(m->i915)) { 516 err_printf(m, " GFX_MODE: 0x%08x\n", ee->vm_info.gfx_mode); 517 518 if (INTEL_GEN(m->i915) >= 8) { 519 int i; 520 for (i = 0; i < 4; i++) 521 err_printf(m, " PDP%d: 0x%016llx\n", 522 i, ee->vm_info.pdp[i]); 523 } else { 524 err_printf(m, " PP_DIR_BASE: 0x%08x\n", 525 ee->vm_info.pp_dir_base); 526 } 527 } 528 err_printf(m, " seqno: 0x%08x\n", ee->seqno); 529 err_printf(m, " last_seqno: 0x%08x\n", ee->last_seqno); 530 err_printf(m, " waiting: %s\n", yesno(ee->waiting)); 531 err_printf(m, " ring->head: 0x%08x\n", ee->cpu_ring_head); 532 err_printf(m, " ring->tail: 0x%08x\n", ee->cpu_ring_tail); 533 err_printf(m, " hangcheck stall: %s\n", yesno(ee->hangcheck_stalled)); 534 err_printf(m, " hangcheck action: %s\n", 535 hangcheck_action_to_str(ee->hangcheck_action)); 536 err_printf(m, " hangcheck action timestamp: %dms (%lu%s)\n", 537 jiffies_to_msecs(ee->hangcheck_timestamp - epoch), 538 ee->hangcheck_timestamp, 539 ee->hangcheck_timestamp == epoch ? "; epoch" : ""); 540 err_printf(m, " engine reset count: %u\n", ee->reset_count); 541 542 for (n = 0; n < ee->num_ports; n++) { 543 err_printf(m, " ELSP[%d]:", n); 544 error_print_request(m, " ", &ee->execlist[n], epoch); 545 } 546 547 error_print_context(m, " Active context: ", &ee->context); 548 } 549 550 void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...) 551 { 552 va_list args; 553 554 va_start(args, f); 555 i915_error_vprintf(e, f, args); 556 va_end(args); 557 } 558 559 static void print_error_obj(struct drm_i915_error_state_buf *m, 560 struct intel_engine_cs *engine, 561 const char *name, 562 struct drm_i915_error_object *obj) 563 { 564 char out[ASCII85_BUFSZ]; 565 int page; 566 567 if (!obj) 568 return; 569 570 if (name) { 571 err_printf(m, "%s --- %s = 0x%08x %08x\n", 572 engine ? engine->name : "global", name, 573 upper_32_bits(obj->gtt_offset), 574 lower_32_bits(obj->gtt_offset)); 575 } 576 577 err_compression_marker(m); 578 for (page = 0; page < obj->page_count; page++) { 579 int i, len; 580 581 len = PAGE_SIZE; 582 if (page == obj->page_count - 1) 583 len -= obj->unused; 584 len = ascii85_encode_len(len); 585 586 for (i = 0; i < len; i++) 587 err_puts(m, ascii85_encode(obj->pages[page][i], out)); 588 } 589 err_puts(m, "\n"); 590 } 591 592 static void err_print_capabilities(struct drm_i915_error_state_buf *m, 593 const struct intel_device_info *info, 594 const struct intel_driver_caps *caps) 595 { 596 struct drm_printer p = i915_error_printer(m); 597 598 intel_device_info_dump_flags(info, &p); 599 intel_driver_caps_print(caps, &p); 600 intel_device_info_dump_topology(&info->sseu, &p); 601 } 602 603 static void err_print_params(struct drm_i915_error_state_buf *m, 604 const struct i915_params *params) 605 { 606 struct drm_printer p = i915_error_printer(m); 607 608 i915_params_dump(params, &p); 609 } 610 611 static void err_print_pciid(struct drm_i915_error_state_buf *m, 612 struct drm_i915_private *i915) 613 { 614 struct pci_dev *pdev = i915->drm.pdev; 615 616 err_printf(m, "PCI ID: 0x%04x\n", pdev->device); 617 err_printf(m, "PCI Revision: 0x%02x\n", pdev->revision); 618 err_printf(m, "PCI Subsystem: %04x:%04x\n", 619 pdev->subsystem_vendor, 620 pdev->subsystem_device); 621 } 622 623 static void err_print_uc(struct drm_i915_error_state_buf *m, 624 const struct i915_error_uc *error_uc) 625 { 626 struct drm_printer p = i915_error_printer(m); 627 const struct i915_gpu_state *error = 628 container_of(error_uc, typeof(*error), uc); 629 630 if (!error->device_info.has_guc) 631 return; 632 633 intel_uc_fw_dump(&error_uc->guc_fw, &p); 634 intel_uc_fw_dump(&error_uc->huc_fw, &p); 635 print_error_obj(m, NULL, "GuC log buffer", error_uc->guc_log); 636 } 637 638 int i915_error_state_to_str(struct drm_i915_error_state_buf *m, 639 const struct i915_gpu_state *error) 640 { 641 struct drm_i915_private *dev_priv = m->i915; 642 struct drm_i915_error_object *obj; 643 struct timespec64 ts; 644 int i, j; 645 646 if (!error) { 647 err_printf(m, "No error state collected\n"); 648 return 0; 649 } 650 651 if (*error->error_msg) 652 err_printf(m, "%s\n", error->error_msg); 653 err_printf(m, "Kernel: " UTS_RELEASE "\n"); 654 ts = ktime_to_timespec64(error->time); 655 err_printf(m, "Time: %lld s %ld us\n", 656 (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC); 657 ts = ktime_to_timespec64(error->boottime); 658 err_printf(m, "Boottime: %lld s %ld us\n", 659 (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC); 660 ts = ktime_to_timespec64(error->uptime); 661 err_printf(m, "Uptime: %lld s %ld us\n", 662 (s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC); 663 err_printf(m, "Epoch: %lu jiffies (%u HZ)\n", error->epoch, HZ); 664 err_printf(m, "Capture: %lu jiffies; %d ms ago, %d ms after epoch\n", 665 error->capture, 666 jiffies_to_msecs(jiffies - error->capture), 667 jiffies_to_msecs(error->capture - error->epoch)); 668 669 for (i = 0; i < ARRAY_SIZE(error->engine); i++) { 670 if (error->engine[i].hangcheck_stalled && 671 error->engine[i].context.pid) { 672 err_printf(m, "Active process (on ring %s): %s [%d], score %d%s\n", 673 engine_name(m->i915, i), 674 error->engine[i].context.comm, 675 error->engine[i].context.pid, 676 error->engine[i].context.ban_score, 677 bannable(&error->engine[i].context)); 678 } 679 } 680 err_printf(m, "Reset count: %u\n", error->reset_count); 681 err_printf(m, "Suspend count: %u\n", error->suspend_count); 682 err_printf(m, "Platform: %s\n", intel_platform_name(error->device_info.platform)); 683 err_print_pciid(m, error->i915); 684 685 err_printf(m, "IOMMU enabled?: %d\n", error->iommu); 686 687 if (HAS_CSR(dev_priv)) { 688 struct intel_csr *csr = &dev_priv->csr; 689 690 err_printf(m, "DMC loaded: %s\n", 691 yesno(csr->dmc_payload != NULL)); 692 err_printf(m, "DMC fw version: %d.%d\n", 693 CSR_VERSION_MAJOR(csr->version), 694 CSR_VERSION_MINOR(csr->version)); 695 } 696 697 err_printf(m, "GT awake: %s\n", yesno(error->awake)); 698 err_printf(m, "RPM wakelock: %s\n", yesno(error->wakelock)); 699 err_printf(m, "PM suspended: %s\n", yesno(error->suspended)); 700 err_printf(m, "EIR: 0x%08x\n", error->eir); 701 err_printf(m, "IER: 0x%08x\n", error->ier); 702 for (i = 0; i < error->ngtier; i++) 703 err_printf(m, "GTIER[%d]: 0x%08x\n", i, error->gtier[i]); 704 err_printf(m, "PGTBL_ER: 0x%08x\n", error->pgtbl_er); 705 err_printf(m, "FORCEWAKE: 0x%08x\n", error->forcewake); 706 err_printf(m, "DERRMR: 0x%08x\n", error->derrmr); 707 err_printf(m, "CCID: 0x%08x\n", error->ccid); 708 err_printf(m, "Missed interrupts: 0x%08lx\n", dev_priv->gpu_error.missed_irq_rings); 709 710 for (i = 0; i < error->nfence; i++) 711 err_printf(m, " fence[%d] = %08llx\n", i, error->fence[i]); 712 713 if (INTEL_GEN(dev_priv) >= 6) { 714 err_printf(m, "ERROR: 0x%08x\n", error->error); 715 716 if (INTEL_GEN(dev_priv) >= 8) 717 err_printf(m, "FAULT_TLB_DATA: 0x%08x 0x%08x\n", 718 error->fault_data1, error->fault_data0); 719 720 err_printf(m, "DONE_REG: 0x%08x\n", error->done_reg); 721 } 722 723 if (IS_GEN7(dev_priv)) 724 err_printf(m, "ERR_INT: 0x%08x\n", error->err_int); 725 726 for (i = 0; i < ARRAY_SIZE(error->engine); i++) { 727 if (error->engine[i].engine_id != -1) 728 error_print_engine(m, &error->engine[i], error->epoch); 729 } 730 731 for (i = 0; i < ARRAY_SIZE(error->active_vm); i++) { 732 char buf[128]; 733 int len, first = 1; 734 735 if (!error->active_vm[i]) 736 break; 737 738 len = scnprintf(buf, sizeof(buf), "Active ("); 739 for (j = 0; j < ARRAY_SIZE(error->engine); j++) { 740 if (error->engine[j].vm != error->active_vm[i]) 741 continue; 742 743 len += scnprintf(buf + len, sizeof(buf), "%s%s", 744 first ? "" : ", ", 745 dev_priv->engine[j]->name); 746 first = 0; 747 } 748 scnprintf(buf + len, sizeof(buf), ")"); 749 print_error_buffers(m, buf, 750 error->active_bo[i], 751 error->active_bo_count[i]); 752 } 753 754 print_error_buffers(m, "Pinned (global)", 755 error->pinned_bo, 756 error->pinned_bo_count); 757 758 for (i = 0; i < ARRAY_SIZE(error->engine); i++) { 759 const struct drm_i915_error_engine *ee = &error->engine[i]; 760 761 obj = ee->batchbuffer; 762 if (obj) { 763 err_puts(m, dev_priv->engine[i]->name); 764 if (ee->context.pid) 765 err_printf(m, " (submitted by %s [%d], ctx %d [%d], score %d%s)", 766 ee->context.comm, 767 ee->context.pid, 768 ee->context.handle, 769 ee->context.hw_id, 770 ee->context.ban_score, 771 bannable(&ee->context)); 772 err_printf(m, " --- gtt_offset = 0x%08x %08x\n", 773 upper_32_bits(obj->gtt_offset), 774 lower_32_bits(obj->gtt_offset)); 775 print_error_obj(m, dev_priv->engine[i], NULL, obj); 776 } 777 778 for (j = 0; j < ee->user_bo_count; j++) 779 print_error_obj(m, dev_priv->engine[i], 780 "user", ee->user_bo[j]); 781 782 if (ee->num_requests) { 783 err_printf(m, "%s --- %d requests\n", 784 dev_priv->engine[i]->name, 785 ee->num_requests); 786 for (j = 0; j < ee->num_requests; j++) 787 error_print_request(m, " ", 788 &ee->requests[j], 789 error->epoch); 790 } 791 792 if (IS_ERR(ee->waiters)) { 793 err_printf(m, "%s --- ? waiters [unable to acquire spinlock]\n", 794 dev_priv->engine[i]->name); 795 } else if (ee->num_waiters) { 796 err_printf(m, "%s --- %d waiters\n", 797 dev_priv->engine[i]->name, 798 ee->num_waiters); 799 for (j = 0; j < ee->num_waiters; j++) { 800 err_printf(m, " seqno 0x%08x for %s [%d]\n", 801 ee->waiters[j].seqno, 802 ee->waiters[j].comm, 803 ee->waiters[j].pid); 804 } 805 } 806 807 print_error_obj(m, dev_priv->engine[i], 808 "ringbuffer", ee->ringbuffer); 809 810 print_error_obj(m, dev_priv->engine[i], 811 "HW Status", ee->hws_page); 812 813 print_error_obj(m, dev_priv->engine[i], 814 "HW context", ee->ctx); 815 816 print_error_obj(m, dev_priv->engine[i], 817 "WA context", ee->wa_ctx); 818 819 print_error_obj(m, dev_priv->engine[i], 820 "WA batchbuffer", ee->wa_batchbuffer); 821 822 print_error_obj(m, dev_priv->engine[i], 823 "NULL context", ee->default_state); 824 } 825 826 if (error->overlay) 827 intel_overlay_print_error_state(m, error->overlay); 828 829 if (error->display) 830 intel_display_print_error_state(m, error->display); 831 832 err_print_capabilities(m, &error->device_info, &error->driver_caps); 833 err_print_params(m, &error->params); 834 err_print_uc(m, &error->uc); 835 836 if (m->bytes == 0 && m->err) 837 return m->err; 838 839 return 0; 840 } 841 842 int i915_error_state_buf_init(struct drm_i915_error_state_buf *ebuf, 843 struct drm_i915_private *i915, 844 size_t count, loff_t pos) 845 { 846 memset(ebuf, 0, sizeof(*ebuf)); 847 ebuf->i915 = i915; 848 849 /* We need to have enough room to store any i915_error_state printf 850 * so that we can move it to start position. 851 */ 852 ebuf->size = count + 1 > PAGE_SIZE ? count + 1 : PAGE_SIZE; 853 ebuf->buf = kmalloc(ebuf->size, 854 GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN); 855 856 if (ebuf->buf == NULL) { 857 ebuf->size = PAGE_SIZE; 858 ebuf->buf = kmalloc(ebuf->size, GFP_KERNEL); 859 } 860 861 if (ebuf->buf == NULL) { 862 ebuf->size = 128; 863 ebuf->buf = kmalloc(ebuf->size, GFP_KERNEL); 864 } 865 866 if (ebuf->buf == NULL) 867 return -ENOMEM; 868 869 ebuf->start = pos; 870 871 return 0; 872 } 873 874 static void i915_error_object_free(struct drm_i915_error_object *obj) 875 { 876 int page; 877 878 if (obj == NULL) 879 return; 880 881 for (page = 0; page < obj->page_count; page++) 882 free_page((unsigned long)obj->pages[page]); 883 884 kfree(obj); 885 } 886 887 static __always_inline void free_param(const char *type, void *x) 888 { 889 if (!__builtin_strcmp(type, "char *")) 890 kfree(*(void **)x); 891 } 892 893 static void cleanup_params(struct i915_gpu_state *error) 894 { 895 #define FREE(T, x, ...) free_param(#T, &error->params.x); 896 I915_PARAMS_FOR_EACH(FREE); 897 #undef FREE 898 } 899 900 static void cleanup_uc_state(struct i915_gpu_state *error) 901 { 902 struct i915_error_uc *error_uc = &error->uc; 903 904 kfree(error_uc->guc_fw.path); 905 kfree(error_uc->huc_fw.path); 906 i915_error_object_free(error_uc->guc_log); 907 } 908 909 void __i915_gpu_state_free(struct kref *error_ref) 910 { 911 struct i915_gpu_state *error = 912 container_of(error_ref, typeof(*error), ref); 913 long i, j; 914 915 for (i = 0; i < ARRAY_SIZE(error->engine); i++) { 916 struct drm_i915_error_engine *ee = &error->engine[i]; 917 918 for (j = 0; j < ee->user_bo_count; j++) 919 i915_error_object_free(ee->user_bo[j]); 920 kfree(ee->user_bo); 921 922 i915_error_object_free(ee->batchbuffer); 923 i915_error_object_free(ee->wa_batchbuffer); 924 i915_error_object_free(ee->ringbuffer); 925 i915_error_object_free(ee->hws_page); 926 i915_error_object_free(ee->ctx); 927 i915_error_object_free(ee->wa_ctx); 928 929 kfree(ee->requests); 930 if (!IS_ERR_OR_NULL(ee->waiters)) 931 kfree(ee->waiters); 932 } 933 934 for (i = 0; i < ARRAY_SIZE(error->active_bo); i++) 935 kfree(error->active_bo[i]); 936 kfree(error->pinned_bo); 937 938 kfree(error->overlay); 939 kfree(error->display); 940 941 cleanup_params(error); 942 cleanup_uc_state(error); 943 944 kfree(error); 945 } 946 947 static struct drm_i915_error_object * 948 i915_error_object_create(struct drm_i915_private *i915, 949 struct i915_vma *vma) 950 { 951 struct i915_ggtt *ggtt = &i915->ggtt; 952 const u64 slot = ggtt->error_capture.start; 953 struct drm_i915_error_object *dst; 954 struct compress compress; 955 unsigned long num_pages; 956 struct sgt_iter iter; 957 dma_addr_t dma; 958 int ret; 959 960 if (!vma) 961 return NULL; 962 963 num_pages = min_t(u64, vma->size, vma->obj->base.size) >> PAGE_SHIFT; 964 num_pages = DIV_ROUND_UP(10 * num_pages, 8); /* worstcase zlib growth */ 965 dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), 966 GFP_ATOMIC | __GFP_NOWARN); 967 if (!dst) 968 return NULL; 969 970 dst->gtt_offset = vma->node.start; 971 dst->gtt_size = vma->node.size; 972 dst->num_pages = num_pages; 973 dst->page_count = 0; 974 dst->unused = 0; 975 976 if (!compress_init(&compress)) { 977 kfree(dst); 978 return NULL; 979 } 980 981 ret = -EINVAL; 982 for_each_sgt_dma(dma, iter, vma->pages) { 983 void __iomem *s; 984 985 ggtt->vm.insert_page(&ggtt->vm, dma, slot, I915_CACHE_NONE, 0); 986 987 s = io_mapping_map_atomic_wc(&ggtt->iomap, slot); 988 ret = compress_page(&compress, (void __force *)s, dst); 989 io_mapping_unmap_atomic(s); 990 if (ret) 991 break; 992 } 993 994 if (ret || compress_flush(&compress, dst)) { 995 while (dst->page_count--) 996 free_page((unsigned long)dst->pages[dst->page_count]); 997 kfree(dst); 998 dst = NULL; 999 } 1000 1001 compress_fini(&compress, dst); 1002 return dst; 1003 } 1004 1005 /* The error capture is special as tries to run underneath the normal 1006 * locking rules - so we use the raw version of the i915_gem_active lookup. 1007 */ 1008 static inline uint32_t 1009 __active_get_seqno(struct i915_gem_active *active) 1010 { 1011 struct i915_request *request; 1012 1013 request = __i915_gem_active_peek(active); 1014 return request ? request->global_seqno : 0; 1015 } 1016 1017 static inline int 1018 __active_get_engine_id(struct i915_gem_active *active) 1019 { 1020 struct i915_request *request; 1021 1022 request = __i915_gem_active_peek(active); 1023 return request ? request->engine->id : -1; 1024 } 1025 1026 static void capture_bo(struct drm_i915_error_buffer *err, 1027 struct i915_vma *vma) 1028 { 1029 struct drm_i915_gem_object *obj = vma->obj; 1030 1031 err->size = obj->base.size; 1032 err->name = obj->base.name; 1033 1034 err->wseqno = __active_get_seqno(&obj->frontbuffer_write); 1035 err->engine = __active_get_engine_id(&obj->frontbuffer_write); 1036 1037 err->gtt_offset = vma->node.start; 1038 err->read_domains = obj->read_domains; 1039 err->write_domain = obj->write_domain; 1040 err->fence_reg = vma->fence ? vma->fence->id : -1; 1041 err->tiling = i915_gem_object_get_tiling(obj); 1042 err->dirty = obj->mm.dirty; 1043 err->purgeable = obj->mm.madv != I915_MADV_WILLNEED; 1044 err->userptr = obj->userptr.mm != NULL; 1045 err->cache_level = obj->cache_level; 1046 } 1047 1048 static u32 capture_error_bo(struct drm_i915_error_buffer *err, 1049 int count, struct list_head *head, 1050 bool pinned_only) 1051 { 1052 struct i915_vma *vma; 1053 int i = 0; 1054 1055 list_for_each_entry(vma, head, vm_link) { 1056 if (!vma->obj) 1057 continue; 1058 1059 if (pinned_only && !i915_vma_is_pinned(vma)) 1060 continue; 1061 1062 capture_bo(err++, vma); 1063 if (++i == count) 1064 break; 1065 } 1066 1067 return i; 1068 } 1069 1070 /* Generate a semi-unique error code. The code is not meant to have meaning, The 1071 * code's only purpose is to try to prevent false duplicated bug reports by 1072 * grossly estimating a GPU error state. 1073 * 1074 * TODO Ideally, hashing the batchbuffer would be a very nice way to determine 1075 * the hang if we could strip the GTT offset information from it. 1076 * 1077 * It's only a small step better than a random number in its current form. 1078 */ 1079 static uint32_t i915_error_generate_code(struct drm_i915_private *dev_priv, 1080 struct i915_gpu_state *error, 1081 int *engine_id) 1082 { 1083 uint32_t error_code = 0; 1084 int i; 1085 1086 /* IPEHR would be an ideal way to detect errors, as it's the gross 1087 * measure of "the command that hung." However, has some very common 1088 * synchronization commands which almost always appear in the case 1089 * strictly a client bug. Use instdone to differentiate those some. 1090 */ 1091 for (i = 0; i < I915_NUM_ENGINES; i++) { 1092 if (error->engine[i].hangcheck_stalled) { 1093 if (engine_id) 1094 *engine_id = i; 1095 1096 return error->engine[i].ipehr ^ 1097 error->engine[i].instdone.instdone; 1098 } 1099 } 1100 1101 return error_code; 1102 } 1103 1104 static void gem_record_fences(struct i915_gpu_state *error) 1105 { 1106 struct drm_i915_private *dev_priv = error->i915; 1107 int i; 1108 1109 if (INTEL_GEN(dev_priv) >= 6) { 1110 for (i = 0; i < dev_priv->num_fence_regs; i++) 1111 error->fence[i] = I915_READ64(FENCE_REG_GEN6_LO(i)); 1112 } else if (INTEL_GEN(dev_priv) >= 4) { 1113 for (i = 0; i < dev_priv->num_fence_regs; i++) 1114 error->fence[i] = I915_READ64(FENCE_REG_965_LO(i)); 1115 } else { 1116 for (i = 0; i < dev_priv->num_fence_regs; i++) 1117 error->fence[i] = I915_READ(FENCE_REG(i)); 1118 } 1119 error->nfence = i; 1120 } 1121 1122 static void gen6_record_semaphore_state(struct intel_engine_cs *engine, 1123 struct drm_i915_error_engine *ee) 1124 { 1125 struct drm_i915_private *dev_priv = engine->i915; 1126 1127 ee->semaphore_mboxes[0] = I915_READ(RING_SYNC_0(engine->mmio_base)); 1128 ee->semaphore_mboxes[1] = I915_READ(RING_SYNC_1(engine->mmio_base)); 1129 if (HAS_VEBOX(dev_priv)) 1130 ee->semaphore_mboxes[2] = 1131 I915_READ(RING_SYNC_2(engine->mmio_base)); 1132 } 1133 1134 static void error_record_engine_waiters(struct intel_engine_cs *engine, 1135 struct drm_i915_error_engine *ee) 1136 { 1137 struct intel_breadcrumbs *b = &engine->breadcrumbs; 1138 struct drm_i915_error_waiter *waiter; 1139 struct rb_node *rb; 1140 int count; 1141 1142 ee->num_waiters = 0; 1143 ee->waiters = NULL; 1144 1145 if (RB_EMPTY_ROOT(&b->waiters)) 1146 return; 1147 1148 if (!spin_trylock_irq(&b->rb_lock)) { 1149 ee->waiters = ERR_PTR(-EDEADLK); 1150 return; 1151 } 1152 1153 count = 0; 1154 for (rb = rb_first(&b->waiters); rb != NULL; rb = rb_next(rb)) 1155 count++; 1156 spin_unlock_irq(&b->rb_lock); 1157 1158 waiter = NULL; 1159 if (count) 1160 waiter = kmalloc_array(count, 1161 sizeof(struct drm_i915_error_waiter), 1162 GFP_ATOMIC); 1163 if (!waiter) 1164 return; 1165 1166 if (!spin_trylock_irq(&b->rb_lock)) { 1167 kfree(waiter); 1168 ee->waiters = ERR_PTR(-EDEADLK); 1169 return; 1170 } 1171 1172 ee->waiters = waiter; 1173 for (rb = rb_first(&b->waiters); rb; rb = rb_next(rb)) { 1174 struct intel_wait *w = rb_entry(rb, typeof(*w), node); 1175 1176 strcpy(waiter->comm, w->tsk->comm); 1177 waiter->pid = w->tsk->pid; 1178 waiter->seqno = w->seqno; 1179 waiter++; 1180 1181 if (++ee->num_waiters == count) 1182 break; 1183 } 1184 spin_unlock_irq(&b->rb_lock); 1185 } 1186 1187 static void error_record_engine_registers(struct i915_gpu_state *error, 1188 struct intel_engine_cs *engine, 1189 struct drm_i915_error_engine *ee) 1190 { 1191 struct drm_i915_private *dev_priv = engine->i915; 1192 1193 if (INTEL_GEN(dev_priv) >= 6) { 1194 ee->rc_psmi = I915_READ(RING_PSMI_CTL(engine->mmio_base)); 1195 if (INTEL_GEN(dev_priv) >= 8) { 1196 ee->fault_reg = I915_READ(GEN8_RING_FAULT_REG); 1197 } else { 1198 gen6_record_semaphore_state(engine, ee); 1199 ee->fault_reg = I915_READ(RING_FAULT_REG(engine)); 1200 } 1201 } 1202 1203 if (INTEL_GEN(dev_priv) >= 4) { 1204 ee->faddr = I915_READ(RING_DMA_FADD(engine->mmio_base)); 1205 ee->ipeir = I915_READ(RING_IPEIR(engine->mmio_base)); 1206 ee->ipehr = I915_READ(RING_IPEHR(engine->mmio_base)); 1207 ee->instps = I915_READ(RING_INSTPS(engine->mmio_base)); 1208 ee->bbaddr = I915_READ(RING_BBADDR(engine->mmio_base)); 1209 if (INTEL_GEN(dev_priv) >= 8) { 1210 ee->faddr |= (u64) I915_READ(RING_DMA_FADD_UDW(engine->mmio_base)) << 32; 1211 ee->bbaddr |= (u64) I915_READ(RING_BBADDR_UDW(engine->mmio_base)) << 32; 1212 } 1213 ee->bbstate = I915_READ(RING_BBSTATE(engine->mmio_base)); 1214 } else { 1215 ee->faddr = I915_READ(DMA_FADD_I8XX); 1216 ee->ipeir = I915_READ(IPEIR); 1217 ee->ipehr = I915_READ(IPEHR); 1218 } 1219 1220 intel_engine_get_instdone(engine, &ee->instdone); 1221 1222 ee->waiting = intel_engine_has_waiter(engine); 1223 ee->instpm = I915_READ(RING_INSTPM(engine->mmio_base)); 1224 ee->acthd = intel_engine_get_active_head(engine); 1225 ee->seqno = intel_engine_get_seqno(engine); 1226 ee->last_seqno = intel_engine_last_submit(engine); 1227 ee->start = I915_READ_START(engine); 1228 ee->head = I915_READ_HEAD(engine); 1229 ee->tail = I915_READ_TAIL(engine); 1230 ee->ctl = I915_READ_CTL(engine); 1231 if (INTEL_GEN(dev_priv) > 2) 1232 ee->mode = I915_READ_MODE(engine); 1233 1234 if (!HWS_NEEDS_PHYSICAL(dev_priv)) { 1235 i915_reg_t mmio; 1236 1237 if (IS_GEN7(dev_priv)) { 1238 switch (engine->id) { 1239 default: 1240 case RCS: 1241 mmio = RENDER_HWS_PGA_GEN7; 1242 break; 1243 case BCS: 1244 mmio = BLT_HWS_PGA_GEN7; 1245 break; 1246 case VCS: 1247 mmio = BSD_HWS_PGA_GEN7; 1248 break; 1249 case VECS: 1250 mmio = VEBOX_HWS_PGA_GEN7; 1251 break; 1252 } 1253 } else if (IS_GEN6(engine->i915)) { 1254 mmio = RING_HWS_PGA_GEN6(engine->mmio_base); 1255 } else { 1256 /* XXX: gen8 returns to sanity */ 1257 mmio = RING_HWS_PGA(engine->mmio_base); 1258 } 1259 1260 ee->hws = I915_READ(mmio); 1261 } 1262 1263 ee->idle = intel_engine_is_idle(engine); 1264 ee->hangcheck_timestamp = engine->hangcheck.action_timestamp; 1265 ee->hangcheck_action = engine->hangcheck.action; 1266 ee->hangcheck_stalled = engine->hangcheck.stalled; 1267 ee->reset_count = i915_reset_engine_count(&dev_priv->gpu_error, 1268 engine); 1269 1270 if (HAS_PPGTT(dev_priv)) { 1271 int i; 1272 1273 ee->vm_info.gfx_mode = I915_READ(RING_MODE_GEN7(engine)); 1274 1275 if (IS_GEN6(dev_priv)) 1276 ee->vm_info.pp_dir_base = 1277 I915_READ(RING_PP_DIR_BASE_READ(engine)); 1278 else if (IS_GEN7(dev_priv)) 1279 ee->vm_info.pp_dir_base = 1280 I915_READ(RING_PP_DIR_BASE(engine)); 1281 else if (INTEL_GEN(dev_priv) >= 8) 1282 for (i = 0; i < 4; i++) { 1283 ee->vm_info.pdp[i] = 1284 I915_READ(GEN8_RING_PDP_UDW(engine, i)); 1285 ee->vm_info.pdp[i] <<= 32; 1286 ee->vm_info.pdp[i] |= 1287 I915_READ(GEN8_RING_PDP_LDW(engine, i)); 1288 } 1289 } 1290 } 1291 1292 static void record_request(struct i915_request *request, 1293 struct drm_i915_error_request *erq) 1294 { 1295 struct i915_gem_context *ctx = request->gem_context; 1296 1297 erq->context = ctx->hw_id; 1298 erq->sched_attr = request->sched.attr; 1299 erq->ban_score = atomic_read(&ctx->ban_score); 1300 erq->seqno = request->global_seqno; 1301 erq->jiffies = request->emitted_jiffies; 1302 erq->start = i915_ggtt_offset(request->ring->vma); 1303 erq->head = request->head; 1304 erq->tail = request->tail; 1305 1306 rcu_read_lock(); 1307 erq->pid = ctx->pid ? pid_nr(ctx->pid) : 0; 1308 rcu_read_unlock(); 1309 } 1310 1311 static void engine_record_requests(struct intel_engine_cs *engine, 1312 struct i915_request *first, 1313 struct drm_i915_error_engine *ee) 1314 { 1315 struct i915_request *request; 1316 int count; 1317 1318 count = 0; 1319 request = first; 1320 list_for_each_entry_from(request, &engine->timeline.requests, link) 1321 count++; 1322 if (!count) 1323 return; 1324 1325 ee->requests = kcalloc(count, sizeof(*ee->requests), GFP_ATOMIC); 1326 if (!ee->requests) 1327 return; 1328 1329 ee->num_requests = count; 1330 1331 count = 0; 1332 request = first; 1333 list_for_each_entry_from(request, &engine->timeline.requests, link) { 1334 if (count >= ee->num_requests) { 1335 /* 1336 * If the ring request list was changed in 1337 * between the point where the error request 1338 * list was created and dimensioned and this 1339 * point then just exit early to avoid crashes. 1340 * 1341 * We don't need to communicate that the 1342 * request list changed state during error 1343 * state capture and that the error state is 1344 * slightly incorrect as a consequence since we 1345 * are typically only interested in the request 1346 * list state at the point of error state 1347 * capture, not in any changes happening during 1348 * the capture. 1349 */ 1350 break; 1351 } 1352 1353 record_request(request, &ee->requests[count++]); 1354 } 1355 ee->num_requests = count; 1356 } 1357 1358 static void error_record_engine_execlists(struct intel_engine_cs *engine, 1359 struct drm_i915_error_engine *ee) 1360 { 1361 const struct intel_engine_execlists * const execlists = &engine->execlists; 1362 unsigned int n; 1363 1364 for (n = 0; n < execlists_num_ports(execlists); n++) { 1365 struct i915_request *rq = port_request(&execlists->port[n]); 1366 1367 if (!rq) 1368 break; 1369 1370 record_request(rq, &ee->execlist[n]); 1371 } 1372 1373 ee->num_ports = n; 1374 } 1375 1376 static void record_context(struct drm_i915_error_context *e, 1377 struct i915_gem_context *ctx) 1378 { 1379 if (ctx->pid) { 1380 struct task_struct *task; 1381 1382 rcu_read_lock(); 1383 task = pid_task(ctx->pid, PIDTYPE_PID); 1384 if (task) { 1385 strcpy(e->comm, task->comm); 1386 e->pid = task->pid; 1387 } 1388 rcu_read_unlock(); 1389 } 1390 1391 e->handle = ctx->user_handle; 1392 e->hw_id = ctx->hw_id; 1393 e->sched_attr = ctx->sched; 1394 e->ban_score = atomic_read(&ctx->ban_score); 1395 e->bannable = i915_gem_context_is_bannable(ctx); 1396 e->guilty = atomic_read(&ctx->guilty_count); 1397 e->active = atomic_read(&ctx->active_count); 1398 } 1399 1400 static void request_record_user_bo(struct i915_request *request, 1401 struct drm_i915_error_engine *ee) 1402 { 1403 struct i915_capture_list *c; 1404 struct drm_i915_error_object **bo; 1405 long count, max; 1406 1407 max = 0; 1408 for (c = request->capture_list; c; c = c->next) 1409 max++; 1410 if (!max) 1411 return; 1412 1413 bo = kmalloc_array(max, sizeof(*bo), GFP_ATOMIC); 1414 if (!bo) { 1415 /* If we can't capture everything, try to capture something. */ 1416 max = min_t(long, max, PAGE_SIZE / sizeof(*bo)); 1417 bo = kmalloc_array(max, sizeof(*bo), GFP_ATOMIC); 1418 } 1419 if (!bo) 1420 return; 1421 1422 count = 0; 1423 for (c = request->capture_list; c; c = c->next) { 1424 bo[count] = i915_error_object_create(request->i915, c->vma); 1425 if (!bo[count]) 1426 break; 1427 if (++count == max) 1428 break; 1429 } 1430 1431 ee->user_bo = bo; 1432 ee->user_bo_count = count; 1433 } 1434 1435 static struct drm_i915_error_object * 1436 capture_object(struct drm_i915_private *dev_priv, 1437 struct drm_i915_gem_object *obj) 1438 { 1439 if (obj && i915_gem_object_has_pages(obj)) { 1440 struct i915_vma fake = { 1441 .node = { .start = U64_MAX, .size = obj->base.size }, 1442 .size = obj->base.size, 1443 .pages = obj->mm.pages, 1444 .obj = obj, 1445 }; 1446 1447 return i915_error_object_create(dev_priv, &fake); 1448 } else { 1449 return NULL; 1450 } 1451 } 1452 1453 static void gem_record_rings(struct i915_gpu_state *error) 1454 { 1455 struct drm_i915_private *i915 = error->i915; 1456 struct i915_ggtt *ggtt = &i915->ggtt; 1457 int i; 1458 1459 for (i = 0; i < I915_NUM_ENGINES; i++) { 1460 struct intel_engine_cs *engine = i915->engine[i]; 1461 struct drm_i915_error_engine *ee = &error->engine[i]; 1462 struct i915_request *request; 1463 1464 ee->engine_id = -1; 1465 1466 if (!engine) 1467 continue; 1468 1469 ee->engine_id = i; 1470 1471 error_record_engine_registers(error, engine, ee); 1472 error_record_engine_waiters(engine, ee); 1473 error_record_engine_execlists(engine, ee); 1474 1475 request = i915_gem_find_active_request(engine); 1476 if (request) { 1477 struct i915_gem_context *ctx = request->gem_context; 1478 struct intel_ring *ring; 1479 1480 ee->vm = ctx->ppgtt ? &ctx->ppgtt->vm : &ggtt->vm; 1481 1482 record_context(&ee->context, ctx); 1483 1484 /* We need to copy these to an anonymous buffer 1485 * as the simplest method to avoid being overwritten 1486 * by userspace. 1487 */ 1488 ee->batchbuffer = 1489 i915_error_object_create(i915, request->batch); 1490 1491 if (HAS_BROKEN_CS_TLB(i915)) 1492 ee->wa_batchbuffer = 1493 i915_error_object_create(i915, 1494 engine->scratch); 1495 request_record_user_bo(request, ee); 1496 1497 ee->ctx = 1498 i915_error_object_create(i915, 1499 request->hw_context->state); 1500 1501 error->simulated |= 1502 i915_gem_context_no_error_capture(ctx); 1503 1504 ee->rq_head = request->head; 1505 ee->rq_post = request->postfix; 1506 ee->rq_tail = request->tail; 1507 1508 ring = request->ring; 1509 ee->cpu_ring_head = ring->head; 1510 ee->cpu_ring_tail = ring->tail; 1511 ee->ringbuffer = 1512 i915_error_object_create(i915, ring->vma); 1513 1514 engine_record_requests(engine, request, ee); 1515 } 1516 1517 ee->hws_page = 1518 i915_error_object_create(i915, 1519 engine->status_page.vma); 1520 1521 ee->wa_ctx = i915_error_object_create(i915, engine->wa_ctx.vma); 1522 1523 ee->default_state = capture_object(i915, engine->default_state); 1524 } 1525 } 1526 1527 static void gem_capture_vm(struct i915_gpu_state *error, 1528 struct i915_address_space *vm, 1529 int idx) 1530 { 1531 struct drm_i915_error_buffer *active_bo; 1532 struct i915_vma *vma; 1533 int count; 1534 1535 count = 0; 1536 list_for_each_entry(vma, &vm->active_list, vm_link) 1537 count++; 1538 1539 active_bo = NULL; 1540 if (count) 1541 active_bo = kcalloc(count, sizeof(*active_bo), GFP_ATOMIC); 1542 if (active_bo) 1543 count = capture_error_bo(active_bo, count, &vm->active_list, false); 1544 else 1545 count = 0; 1546 1547 error->active_vm[idx] = vm; 1548 error->active_bo[idx] = active_bo; 1549 error->active_bo_count[idx] = count; 1550 } 1551 1552 static void capture_active_buffers(struct i915_gpu_state *error) 1553 { 1554 int cnt = 0, i, j; 1555 1556 BUILD_BUG_ON(ARRAY_SIZE(error->engine) > ARRAY_SIZE(error->active_bo)); 1557 BUILD_BUG_ON(ARRAY_SIZE(error->active_bo) != ARRAY_SIZE(error->active_vm)); 1558 BUILD_BUG_ON(ARRAY_SIZE(error->active_bo) != ARRAY_SIZE(error->active_bo_count)); 1559 1560 /* Scan each engine looking for unique active contexts/vm */ 1561 for (i = 0; i < ARRAY_SIZE(error->engine); i++) { 1562 struct drm_i915_error_engine *ee = &error->engine[i]; 1563 bool found; 1564 1565 if (!ee->vm) 1566 continue; 1567 1568 found = false; 1569 for (j = 0; j < i && !found; j++) 1570 found = error->engine[j].vm == ee->vm; 1571 if (!found) 1572 gem_capture_vm(error, ee->vm, cnt++); 1573 } 1574 } 1575 1576 static void capture_pinned_buffers(struct i915_gpu_state *error) 1577 { 1578 struct i915_address_space *vm = &error->i915->ggtt.vm; 1579 struct drm_i915_error_buffer *bo; 1580 struct i915_vma *vma; 1581 int count_inactive, count_active; 1582 1583 count_inactive = 0; 1584 list_for_each_entry(vma, &vm->inactive_list, vm_link) 1585 count_inactive++; 1586 1587 count_active = 0; 1588 list_for_each_entry(vma, &vm->active_list, vm_link) 1589 count_active++; 1590 1591 bo = NULL; 1592 if (count_inactive + count_active) 1593 bo = kcalloc(count_inactive + count_active, 1594 sizeof(*bo), GFP_ATOMIC); 1595 if (!bo) 1596 return; 1597 1598 count_inactive = capture_error_bo(bo, count_inactive, 1599 &vm->active_list, true); 1600 count_active = capture_error_bo(bo + count_inactive, count_active, 1601 &vm->inactive_list, true); 1602 error->pinned_bo_count = count_inactive + count_active; 1603 error->pinned_bo = bo; 1604 } 1605 1606 static void capture_uc_state(struct i915_gpu_state *error) 1607 { 1608 struct drm_i915_private *i915 = error->i915; 1609 struct i915_error_uc *error_uc = &error->uc; 1610 1611 /* Capturing uC state won't be useful if there is no GuC */ 1612 if (!error->device_info.has_guc) 1613 return; 1614 1615 error_uc->guc_fw = i915->guc.fw; 1616 error_uc->huc_fw = i915->huc.fw; 1617 1618 /* Non-default firmware paths will be specified by the modparam. 1619 * As modparams are generally accesible from the userspace make 1620 * explicit copies of the firmware paths. 1621 */ 1622 error_uc->guc_fw.path = kstrdup(i915->guc.fw.path, GFP_ATOMIC); 1623 error_uc->huc_fw.path = kstrdup(i915->huc.fw.path, GFP_ATOMIC); 1624 error_uc->guc_log = i915_error_object_create(i915, i915->guc.log.vma); 1625 } 1626 1627 /* Capture all registers which don't fit into another category. */ 1628 static void capture_reg_state(struct i915_gpu_state *error) 1629 { 1630 struct drm_i915_private *dev_priv = error->i915; 1631 int i; 1632 1633 /* General organization 1634 * 1. Registers specific to a single generation 1635 * 2. Registers which belong to multiple generations 1636 * 3. Feature specific registers. 1637 * 4. Everything else 1638 * Please try to follow the order. 1639 */ 1640 1641 /* 1: Registers specific to a single generation */ 1642 if (IS_VALLEYVIEW(dev_priv)) { 1643 error->gtier[0] = I915_READ(GTIER); 1644 error->ier = I915_READ(VLV_IER); 1645 error->forcewake = I915_READ_FW(FORCEWAKE_VLV); 1646 } 1647 1648 if (IS_GEN7(dev_priv)) 1649 error->err_int = I915_READ(GEN7_ERR_INT); 1650 1651 if (INTEL_GEN(dev_priv) >= 8) { 1652 error->fault_data0 = I915_READ(GEN8_FAULT_TLB_DATA0); 1653 error->fault_data1 = I915_READ(GEN8_FAULT_TLB_DATA1); 1654 } 1655 1656 if (IS_GEN6(dev_priv)) { 1657 error->forcewake = I915_READ_FW(FORCEWAKE); 1658 error->gab_ctl = I915_READ(GAB_CTL); 1659 error->gfx_mode = I915_READ(GFX_MODE); 1660 } 1661 1662 /* 2: Registers which belong to multiple generations */ 1663 if (INTEL_GEN(dev_priv) >= 7) 1664 error->forcewake = I915_READ_FW(FORCEWAKE_MT); 1665 1666 if (INTEL_GEN(dev_priv) >= 6) { 1667 error->derrmr = I915_READ(DERRMR); 1668 error->error = I915_READ(ERROR_GEN6); 1669 error->done_reg = I915_READ(DONE_REG); 1670 } 1671 1672 if (INTEL_GEN(dev_priv) >= 5) 1673 error->ccid = I915_READ(CCID); 1674 1675 /* 3: Feature specific registers */ 1676 if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv)) { 1677 error->gam_ecochk = I915_READ(GAM_ECOCHK); 1678 error->gac_eco = I915_READ(GAC_ECO_BITS); 1679 } 1680 1681 /* 4: Everything else */ 1682 if (INTEL_GEN(dev_priv) >= 11) { 1683 error->ier = I915_READ(GEN8_DE_MISC_IER); 1684 error->gtier[0] = I915_READ(GEN11_RENDER_COPY_INTR_ENABLE); 1685 error->gtier[1] = I915_READ(GEN11_VCS_VECS_INTR_ENABLE); 1686 error->gtier[2] = I915_READ(GEN11_GUC_SG_INTR_ENABLE); 1687 error->gtier[3] = I915_READ(GEN11_GPM_WGBOXPERF_INTR_ENABLE); 1688 error->gtier[4] = I915_READ(GEN11_CRYPTO_RSVD_INTR_ENABLE); 1689 error->gtier[5] = I915_READ(GEN11_GUNIT_CSME_INTR_ENABLE); 1690 error->ngtier = 6; 1691 } else if (INTEL_GEN(dev_priv) >= 8) { 1692 error->ier = I915_READ(GEN8_DE_MISC_IER); 1693 for (i = 0; i < 4; i++) 1694 error->gtier[i] = I915_READ(GEN8_GT_IER(i)); 1695 error->ngtier = 4; 1696 } else if (HAS_PCH_SPLIT(dev_priv)) { 1697 error->ier = I915_READ(DEIER); 1698 error->gtier[0] = I915_READ(GTIER); 1699 error->ngtier = 1; 1700 } else if (IS_GEN2(dev_priv)) { 1701 error->ier = I915_READ16(IER); 1702 } else if (!IS_VALLEYVIEW(dev_priv)) { 1703 error->ier = I915_READ(IER); 1704 } 1705 error->eir = I915_READ(EIR); 1706 error->pgtbl_er = I915_READ(PGTBL_ER); 1707 } 1708 1709 static void i915_error_capture_msg(struct drm_i915_private *dev_priv, 1710 struct i915_gpu_state *error, 1711 u32 engine_mask, 1712 const char *error_msg) 1713 { 1714 u32 ecode; 1715 int engine_id = -1, len; 1716 1717 ecode = i915_error_generate_code(dev_priv, error, &engine_id); 1718 1719 len = scnprintf(error->error_msg, sizeof(error->error_msg), 1720 "GPU HANG: ecode %d:%d:0x%08x", 1721 INTEL_GEN(dev_priv), engine_id, ecode); 1722 1723 if (engine_id != -1 && error->engine[engine_id].context.pid) 1724 len += scnprintf(error->error_msg + len, 1725 sizeof(error->error_msg) - len, 1726 ", in %s [%d]", 1727 error->engine[engine_id].context.comm, 1728 error->engine[engine_id].context.pid); 1729 1730 scnprintf(error->error_msg + len, sizeof(error->error_msg) - len, 1731 ", reason: %s, action: %s", 1732 error_msg, 1733 engine_mask ? "reset" : "continue"); 1734 } 1735 1736 static void capture_gen_state(struct i915_gpu_state *error) 1737 { 1738 struct drm_i915_private *i915 = error->i915; 1739 1740 error->awake = i915->gt.awake; 1741 error->wakelock = atomic_read(&i915->runtime_pm.wakeref_count); 1742 error->suspended = i915->runtime_pm.suspended; 1743 1744 error->iommu = -1; 1745 #ifdef CONFIG_INTEL_IOMMU 1746 error->iommu = intel_iommu_gfx_mapped; 1747 #endif 1748 error->reset_count = i915_reset_count(&i915->gpu_error); 1749 error->suspend_count = i915->suspend_count; 1750 1751 memcpy(&error->device_info, 1752 INTEL_INFO(i915), 1753 sizeof(error->device_info)); 1754 error->driver_caps = i915->caps; 1755 } 1756 1757 static __always_inline void dup_param(const char *type, void *x) 1758 { 1759 if (!__builtin_strcmp(type, "char *")) 1760 *(void **)x = kstrdup(*(void **)x, GFP_ATOMIC); 1761 } 1762 1763 static void capture_params(struct i915_gpu_state *error) 1764 { 1765 error->params = i915_modparams; 1766 #define DUP(T, x, ...) dup_param(#T, &error->params.x); 1767 I915_PARAMS_FOR_EACH(DUP); 1768 #undef DUP 1769 } 1770 1771 static unsigned long capture_find_epoch(const struct i915_gpu_state *error) 1772 { 1773 unsigned long epoch = error->capture; 1774 int i; 1775 1776 for (i = 0; i < ARRAY_SIZE(error->engine); i++) { 1777 const struct drm_i915_error_engine *ee = &error->engine[i]; 1778 1779 if (ee->hangcheck_stalled && 1780 time_before(ee->hangcheck_timestamp, epoch)) 1781 epoch = ee->hangcheck_timestamp; 1782 } 1783 1784 return epoch; 1785 } 1786 1787 static void capture_finish(struct i915_gpu_state *error) 1788 { 1789 struct i915_ggtt *ggtt = &error->i915->ggtt; 1790 const u64 slot = ggtt->error_capture.start; 1791 1792 ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE); 1793 } 1794 1795 static int capture(void *data) 1796 { 1797 struct i915_gpu_state *error = data; 1798 1799 error->time = ktime_get_real(); 1800 error->boottime = ktime_get_boottime(); 1801 error->uptime = ktime_sub(ktime_get(), 1802 error->i915->gt.last_init_time); 1803 error->capture = jiffies; 1804 1805 capture_params(error); 1806 capture_gen_state(error); 1807 capture_uc_state(error); 1808 capture_reg_state(error); 1809 gem_record_fences(error); 1810 gem_record_rings(error); 1811 capture_active_buffers(error); 1812 capture_pinned_buffers(error); 1813 1814 error->overlay = intel_overlay_capture_error_state(error->i915); 1815 error->display = intel_display_capture_error_state(error->i915); 1816 1817 error->epoch = capture_find_epoch(error); 1818 1819 capture_finish(error); 1820 return 0; 1821 } 1822 1823 #define DAY_AS_SECONDS(x) (24 * 60 * 60 * (x)) 1824 1825 struct i915_gpu_state * 1826 i915_capture_gpu_state(struct drm_i915_private *i915) 1827 { 1828 struct i915_gpu_state *error; 1829 1830 error = kzalloc(sizeof(*error), GFP_ATOMIC); 1831 if (!error) 1832 return NULL; 1833 1834 kref_init(&error->ref); 1835 error->i915 = i915; 1836 1837 stop_machine(capture, error, NULL); 1838 1839 return error; 1840 } 1841 1842 /** 1843 * i915_capture_error_state - capture an error record for later analysis 1844 * @i915: i915 device 1845 * @engine_mask: the mask of engines triggering the hang 1846 * @error_msg: a message to insert into the error capture header 1847 * 1848 * Should be called when an error is detected (either a hang or an error 1849 * interrupt) to capture error state from the time of the error. Fills 1850 * out a structure which becomes available in debugfs for user level tools 1851 * to pick up. 1852 */ 1853 void i915_capture_error_state(struct drm_i915_private *i915, 1854 u32 engine_mask, 1855 const char *error_msg) 1856 { 1857 static bool warned; 1858 struct i915_gpu_state *error; 1859 unsigned long flags; 1860 1861 if (!i915_modparams.error_capture) 1862 return; 1863 1864 if (READ_ONCE(i915->gpu_error.first_error)) 1865 return; 1866 1867 error = i915_capture_gpu_state(i915); 1868 if (!error) { 1869 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n"); 1870 return; 1871 } 1872 1873 i915_error_capture_msg(i915, error, engine_mask, error_msg); 1874 DRM_INFO("%s\n", error->error_msg); 1875 1876 if (!error->simulated) { 1877 spin_lock_irqsave(&i915->gpu_error.lock, flags); 1878 if (!i915->gpu_error.first_error) { 1879 i915->gpu_error.first_error = error; 1880 error = NULL; 1881 } 1882 spin_unlock_irqrestore(&i915->gpu_error.lock, flags); 1883 } 1884 1885 if (error) { 1886 __i915_gpu_state_free(&error->ref); 1887 return; 1888 } 1889 1890 if (!warned && 1891 ktime_get_real_seconds() - DRIVER_TIMESTAMP < DAY_AS_SECONDS(180)) { 1892 DRM_INFO("GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.\n"); 1893 DRM_INFO("Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel\n"); 1894 DRM_INFO("drm/i915 developers can then reassign to the right component if it's not a kernel issue.\n"); 1895 DRM_INFO("The gpu crash dump is required to analyze gpu hangs, so please always attach it.\n"); 1896 DRM_INFO("GPU crash dump saved to /sys/class/drm/card%d/error\n", 1897 i915->drm.primary->index); 1898 warned = true; 1899 } 1900 } 1901 1902 struct i915_gpu_state * 1903 i915_first_error_state(struct drm_i915_private *i915) 1904 { 1905 struct i915_gpu_state *error; 1906 1907 spin_lock_irq(&i915->gpu_error.lock); 1908 error = i915->gpu_error.first_error; 1909 if (error) 1910 i915_gpu_state_get(error); 1911 spin_unlock_irq(&i915->gpu_error.lock); 1912 1913 return error; 1914 } 1915 1916 void i915_reset_error_state(struct drm_i915_private *i915) 1917 { 1918 struct i915_gpu_state *error; 1919 1920 spin_lock_irq(&i915->gpu_error.lock); 1921 error = i915->gpu_error.first_error; 1922 i915->gpu_error.first_error = NULL; 1923 spin_unlock_irq(&i915->gpu_error.lock); 1924 1925 i915_gpu_state_put(error); 1926 } 1927