drivers/gpu/drm/i915/i915_gpu_error.c

   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 "i915_drv.h"
  32
  33 static const char *yesno(int v)
  34 {
  35         return v ? "yes" : "no";
  36 }
  37
  38 static const char *ring_str(int ring)
  39 {
  40         switch (ring) {
  41         case RCS: return "render";
  42         case VCS: return "bsd";
  43         case BCS: return "blt";
  44         case VECS: return "vebox";
  45         default: return "";
  46         }
  47 }
  48
  49 static const char *pin_flag(int pinned)
  50 {
  51         if (pinned > 0)
  52                 return " P";
  53         else if (pinned < 0)
  54                 return " p";
  55         else
  56                 return "";
  57 }
  58
  59 static const char *tiling_flag(int tiling)
  60 {
  61         switch (tiling) {
  62         default:
  63         case I915_TILING_NONE: return "";
  64         case I915_TILING_X: return " X";
  65         case I915_TILING_Y: return " Y";
  66         }
  67 }
  68
  69 static const char *dirty_flag(int dirty)
  70 {
  71         return dirty ? " dirty" : "";
  72 }
  73
  74 static const char *purgeable_flag(int purgeable)
  75 {
  76         return purgeable ? " purgeable" : "";
  77 }
  78
  79 static bool __i915_error_ok(struct drm_i915_error_state_buf *e)
  80 {
  81
  82         if (!e->err && WARN(e->bytes > (e->size - 1), "overflow")) {
  83                 e->err = -ENOSPC;
  84                 return false;
  85         }
  86
  87         if (e->bytes == e->size - 1 || e->err)
  88                 return false;
  89
  90         return true;
  91 }
  92
  93 static bool __i915_error_seek(struct drm_i915_error_state_buf *e,
  94                               unsigned len)
  95 {
  96         if (e->pos + len <= e->start) {
  97                 e->pos += len;
  98                 return false;
  99         }
 100
 101         /* First vsnprintf needs to fit in its entirety for memmove */
 102         if (len >= e->size) {
 103                 e->err = -EIO;
 104                 return false;
 105         }
 106
 107         return true;
 108 }
 109
 110 static void __i915_error_advance(struct drm_i915_error_state_buf *e,
 111                                  unsigned len)
 112 {
 113         /* If this is first printf in this window, adjust it so that
 114          * start position matches start of the buffer
 115          */
 116
 117         if (e->pos < e->start) {
 118                 const size_t off = e->start - e->pos;
 119
 120                 /* Should not happen but be paranoid */
 121                 if (off > len || e->bytes) {
 122                         e->err = -EIO;
 123                         return;
 124                 }
 125
 126                 memmove(e->buf, e->buf + off, len - off);
 127                 e->bytes = len - off;
 128                 e->pos = e->start;
 129                 return;
 130         }
 131
 132         e->bytes += len;
 133         e->pos += len;
 134 }
 135
 136 static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
 137                                const char *f, va_list args)
 138 {
 139         unsigned len;
 140
 141         if (!__i915_error_ok(e))
 142                 return;
 143
 144         /* Seek the first printf which is hits start position */
 145         if (e->pos < e->start) {
 146                 va_list tmp;
 147
 148                 va_copy(tmp, args);
 149                 if (!__i915_error_seek(e, vsnprintf(NULL, 0, f, tmp)))
 150                         return;
 151         }
 152
 153         len = vsnprintf(e->buf + e->bytes, e->size - e->bytes, f, args);
 154         if (len >= e->size - e->bytes)
 155                 len = e->size - e->bytes - 1;
 156
 157         __i915_error_advance(e, len);
 158 }
 159
 160 static void i915_error_puts(struct drm_i915_error_state_buf *e,
 161                             const char *str)
 162 {
 163         unsigned len;
 164
 165         if (!__i915_error_ok(e))
 166                 return;
 167
 168         len = strlen(str);
 169
 170         /* Seek the first printf which is hits start position */
 171         if (e->pos < e->start) {
 172                 if (!__i915_error_seek(e, len))
 173                         return;
 174         }
 175
 176         if (len >= e->size - e->bytes)
 177                 len = e->size - e->bytes - 1;
 178         memcpy(e->buf + e->bytes, str, len);
 179
 180         __i915_error_advance(e, len);
 181 }
 182
 183 #define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
 184 #define err_puts(e, s) i915_error_puts(e, s)
 185
 186 static void print_error_buffers(struct drm_i915_error_state_buf *m,
 187                                 const char *name,
 188                                 struct drm_i915_error_buffer *err,
 189                                 int count)
 190 {
 191         err_printf(m, "%s [%d]:\n", name, count);
 192
 193         while (count--) {
 194                 err_printf(m, "  %08x %8u %02x %02x %x %x",
 195                            err->gtt_offset,
 196                            err->size,
 197                            err->read_domains,
 198                            err->write_domain,
 199                            err->rseqno, err->wseqno);
 200                 err_puts(m, pin_flag(err->pinned));
 201                 err_puts(m, tiling_flag(err->tiling));
 202                 err_puts(m, dirty_flag(err->dirty));
 203                 err_puts(m, purgeable_flag(err->purgeable));
 204                 err_puts(m, err->ring != -1 ? " " : "");
 205                 err_puts(m, ring_str(err->ring));
 206                 err_puts(m, i915_cache_level_str(err->cache_level));
 207
 208                 if (err->name)
 209                         err_printf(m, " (name: %d)", err->name);
 210                 if (err->fence_reg != I915_FENCE_REG_NONE)
 211                         err_printf(m, " (fence: %d)", err->fence_reg);
 212
 213                 err_puts(m, "\n");
 214                 err++;
 215         }
 216 }
 217
 218 static const char *hangcheck_action_to_str(enum intel_ring_hangcheck_action a)
 219 {
 220         switch (a) {
 221         case HANGCHECK_IDLE:
 222                 return "idle";
 223         case HANGCHECK_WAIT:
 224                 return "wait";
 225         case HANGCHECK_ACTIVE:
 226                 return "active";
 227         case HANGCHECK_KICK:
 228                 return "kick";
 229         case HANGCHECK_HUNG:
 230                 return "hung";
 231         }
 232
 233         return "unknown";
 234 }
 235
 236 static void i915_ring_error_state(struct drm_i915_error_state_buf *m,
 237                                   struct drm_device *dev,
 238                                   struct drm_i915_error_state *error,
 239                                   unsigned ring)
 240 {
 241         BUG_ON(ring >= I915_NUM_RINGS); /* shut up confused gcc */
 242         err_printf(m, "%s command stream:\n", ring_str(ring));
 243         err_printf(m, "  HEAD: 0x%08x\n", error->head[ring]);
 244         err_printf(m, "  TAIL: 0x%08x\n", error->tail[ring]);
 245         err_printf(m, "  CTL: 0x%08x\n", error->ctl[ring]);
 246         err_printf(m, "  ACTHD: 0x%08x\n", error->acthd[ring]);
 247         err_printf(m, "  IPEIR: 0x%08x\n", error->ipeir[ring]);
 248         err_printf(m, "  IPEHR: 0x%08x\n", error->ipehr[ring]);
 249         err_printf(m, "  INSTDONE: 0x%08x\n", error->instdone[ring]);
 250         if (ring == RCS && INTEL_INFO(dev)->gen >= 4)
 251                 err_printf(m, "  BBADDR: 0x%08llx\n", error->bbaddr);
 252
 253         if (INTEL_INFO(dev)->gen >= 4)
 254                 err_printf(m, "  INSTPS: 0x%08x\n", error->instps[ring]);
 255         err_printf(m, "  INSTPM: 0x%08x\n", error->instpm[ring]);
 256         err_printf(m, "  FADDR: 0x%08x\n", error->faddr[ring]);
 257         if (INTEL_INFO(dev)->gen >= 6) {
 258                 err_printf(m, "  RC PSMI: 0x%08x\n", error->rc_psmi[ring]);
 259                 err_printf(m, "  FAULT_REG: 0x%08x\n", error->fault_reg[ring]);
 260                 err_printf(m, "  SYNC_0: 0x%08x [last synced 0x%08x]\n",
 261                            error->semaphore_mboxes[ring][0],
 262                            error->semaphore_seqno[ring][0]);
 263                 err_printf(m, "  SYNC_1: 0x%08x [last synced 0x%08x]\n",
 264                            error->semaphore_mboxes[ring][1],
 265                            error->semaphore_seqno[ring][1]);
 266                 if (HAS_VEBOX(dev)) {
 267                         err_printf(m, "  SYNC_2: 0x%08x [last synced 0x%08x]\n",
 268                                    error->semaphore_mboxes[ring][2],
 269                                    error->semaphore_seqno[ring][2]);
 270                 }
 271         }
 272         err_printf(m, "  seqno: 0x%08x\n", error->seqno[ring]);
 273         err_printf(m, "  waiting: %s\n", yesno(error->waiting[ring]));
 274         err_printf(m, "  ring->head: 0x%08x\n", error->cpu_ring_head[ring]);
 275         err_printf(m, "  ring->tail: 0x%08x\n", error->cpu_ring_tail[ring]);
 276         err_printf(m, "  hangcheck: %s [%d]\n",
 277                    hangcheck_action_to_str(error->hangcheck_action[ring]),
 278                    error->hangcheck_score[ring]);
 279 }
 280
 281 void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...)
 282 {
 283         va_list args;
 284
 285         va_start(args, f);
 286         i915_error_vprintf(e, f, args);
 287         va_end(args);
 288 }
 289
 290 int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
 291                             const struct i915_error_state_file_priv *error_priv)
 292 {
 293         struct drm_device *dev = error_priv->dev;
 294         drm_i915_private_t *dev_priv = dev->dev_private;
 295         struct drm_i915_error_state *error = error_priv->error;
 296         struct intel_ring_buffer *ring;
 297         int i, j, page, offset, elt;
 298
 299         if (!error) {
 300                 err_printf(m, "no error state collected\n");
 301                 goto out;
 302         }
 303
 304         err_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
 305                    error->time.tv_usec);
 306         err_printf(m, "Kernel: " UTS_RELEASE "\n");
 307         err_printf(m, "PCI ID: 0x%04x\n", dev->pdev->device);
 308         err_printf(m, "EIR: 0x%08x\n", error->eir);
 309         err_printf(m, "IER: 0x%08x\n", error->ier);
 310         err_printf(m, "PGTBL_ER: 0x%08x\n", error->pgtbl_er);
 311         err_printf(m, "FORCEWAKE: 0x%08x\n", error->forcewake);
 312         err_printf(m, "DERRMR: 0x%08x\n", error->derrmr);
 313         err_printf(m, "CCID: 0x%08x\n", error->ccid);
 314         err_printf(m, "Missed interrupts: 0x%08lx\n", dev_priv->gpu_error.missed_irq_rings);
 315
 316         for (i = 0; i < dev_priv->num_fence_regs; i++)
 317                 err_printf(m, "  fence[%d] = %08llx\n", i, error->fence[i]);
 318
 319         for (i = 0; i < ARRAY_SIZE(error->extra_instdone); i++)
 320                 err_printf(m, "  INSTDONE_%d: 0x%08x\n", i,
 321                            error->extra_instdone[i]);
 322
 323         if (INTEL_INFO(dev)->gen >= 6) {
 324                 err_printf(m, "ERROR: 0x%08x\n", error->error);
 325                 err_printf(m, "DONE_REG: 0x%08x\n", error->done_reg);
 326         }
 327
 328         if (INTEL_INFO(dev)->gen == 7)
 329                 err_printf(m, "ERR_INT: 0x%08x\n", error->err_int);
 330
 331         for_each_ring(ring, dev_priv, i)
 332                 i915_ring_error_state(m, dev, error, i);
 333
 334         if (error->active_bo)
 335                 print_error_buffers(m, "Active",
 336                                     error->active_bo[0],
 337                                     error->active_bo_count[0]);
 338
 339         if (error->pinned_bo)
 340                 print_error_buffers(m, "Pinned",
 341                                     error->pinned_bo[0],
 342                                     error->pinned_bo_count[0]);
 343
 344         for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
 345                 struct drm_i915_error_object *obj;
 346
 347                 if ((obj = error->ring[i].batchbuffer)) {
 348                         err_printf(m, "%s --- gtt_offset = 0x%08x\n",
 349                                    dev_priv->ring[i].name,
 350                                    obj->gtt_offset);
 351                         offset = 0;
 352                         for (page = 0; page < obj->page_count; page++) {
 353                                 for (elt = 0; elt < PAGE_SIZE/4; elt++) {
 354                                         err_printf(m, "%08x :  %08x\n", offset,
 355                                                    obj->pages[page][elt]);
 356                                         offset += 4;
 357                                 }
 358                         }
 359                 }
 360
 361                 if (error->ring[i].num_requests) {
 362                         err_printf(m, "%s --- %d requests\n",
 363                                    dev_priv->ring[i].name,
 364                                    error->ring[i].num_requests);
 365                         for (j = 0; j < error->ring[i].num_requests; j++) {
 366                                 err_printf(m, "  seqno 0x%08x, emitted %ld, tail 0x%08x\n",
 367                                            error->ring[i].requests[j].seqno,
 368                                            error->ring[i].requests[j].jiffies,
 369                                            error->ring[i].requests[j].tail);
 370                         }
 371                 }
 372
 373                 if ((obj = error->ring[i].ringbuffer)) {
 374                         err_printf(m, "%s --- ringbuffer = 0x%08x\n",
 375                                    dev_priv->ring[i].name,
 376                                    obj->gtt_offset);
 377                         offset = 0;
 378                         for (page = 0; page < obj->page_count; page++) {
 379                                 for (elt = 0; elt < PAGE_SIZE/4; elt++) {
 380                                         err_printf(m, "%08x :  %08x\n",
 381                                                    offset,
 382                                                    obj->pages[page][elt]);
 383                                         offset += 4;
 384                                 }
 385                         }
 386                 }
 387
 388                 obj = error->ring[i].ctx;
 389                 if (obj) {
 390                         err_printf(m, "%s --- HW Context = 0x%08x\n",
 391                                    dev_priv->ring[i].name,
 392                                    obj->gtt_offset);
 393                         offset = 0;
 394                         for (elt = 0; elt < PAGE_SIZE/16; elt += 4) {
 395                                 err_printf(m, "[%04x] %08x %08x %08x %08x\n",
 396                                            offset,
 397                                            obj->pages[0][elt],
 398                                            obj->pages[0][elt+1],
 399                                            obj->pages[0][elt+2],
 400                                            obj->pages[0][elt+3]);
 401                                         offset += 16;
 402                         }
 403                 }
 404         }
 405
 406         if (error->overlay)
 407                 intel_overlay_print_error_state(m, error->overlay);
 408
 409         if (error->display)
 410                 intel_display_print_error_state(m, dev, error->display);
 411
 412 out:
 413         if (m->bytes == 0 && m->err)
 414                 return m->err;
 415
 416         return 0;
 417 }
 418
 419 int i915_error_state_buf_init(struct drm_i915_error_state_buf *ebuf,
 420                               size_t count, loff_t pos)
 421 {
 422         memset(ebuf, 0, sizeof(*ebuf));
 423
 424         /* We need to have enough room to store any i915_error_state printf
 425          * so that we can move it to start position.
 426          */
 427         ebuf->size = count + 1 > PAGE_SIZE ? count + 1 : PAGE_SIZE;
 428         ebuf->buf = kmalloc(ebuf->size,
 429                                 GFP_TEMPORARY | __GFP_NORETRY | __GFP_NOWARN);
 430
 431         if (ebuf->buf == NULL) {
 432                 ebuf->size = PAGE_SIZE;
 433                 ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
 434         }
 435
 436         if (ebuf->buf == NULL) {
 437                 ebuf->size = 128;
 438                 ebuf->buf = kmalloc(ebuf->size, GFP_TEMPORARY);
 439         }
 440
 441         if (ebuf->buf == NULL)
 442                 return -ENOMEM;
 443
 444         ebuf->start = pos;
 445
 446         return 0;
 447 }
 448
 449 static void i915_error_object_free(struct drm_i915_error_object *obj)
 450 {
 451         int page;
 452
 453         if (obj == NULL)
 454                 return;
 455
 456         for (page = 0; page < obj->page_count; page++)
 457                 kfree(obj->pages[page]);
 458
 459         kfree(obj);
 460 }
 461
 462 static void i915_error_state_free(struct kref *error_ref)
 463 {
 464         struct drm_i915_error_state *error = container_of(error_ref,
 465                                                           typeof(*error), ref);
 466         int i;
 467
 468         for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
 469                 i915_error_object_free(error->ring[i].batchbuffer);
 470                 i915_error_object_free(error->ring[i].ringbuffer);
 471                 i915_error_object_free(error->ring[i].ctx);
 472                 kfree(error->ring[i].requests);
 473         }
 474
 475         kfree(error->active_bo);
 476         kfree(error->overlay);
 477         kfree(error->display);
 478         kfree(error);
 479 }
 480
 481 static struct drm_i915_error_object *
 482 i915_error_object_create_sized(struct drm_i915_private *dev_priv,
 483                                struct drm_i915_gem_object *src,
 484                                const int num_pages)
 485 {
 486         struct drm_i915_error_object *dst;
 487         int i;
 488         u32 reloc_offset;
 489
 490         if (src == NULL || src->pages == NULL)
 491                 return NULL;
 492
 493         dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
 494         if (dst == NULL)
 495                 return NULL;
 496
 497         reloc_offset = dst->gtt_offset = i915_gem_obj_ggtt_offset(src);
 498         for (i = 0; i < num_pages; i++) {
 499                 unsigned long flags;
 500                 void *d;
 501
 502                 d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
 503                 if (d == NULL)
 504                         goto unwind;
 505
 506                 local_irq_save(flags);
 507                 if (reloc_offset < dev_priv->gtt.mappable_end &&
 508                     src->has_global_gtt_mapping) {
 509                         void __iomem *s;
 510
 511                         /* Simply ignore tiling or any overlapping fence.
 512                          * It's part of the error state, and this hopefully
 513                          * captures what the GPU read.
 514                          */
 515
 516                         s = io_mapping_map_atomic_wc(dev_priv->gtt.mappable,
 517                                                      reloc_offset);
 518                         memcpy_fromio(d, s, PAGE_SIZE);
 519                         io_mapping_unmap_atomic(s);
 520                 } else if (src->stolen) {
 521                         unsigned long offset;
 522
 523                         offset = dev_priv->mm.stolen_base;
 524                         offset += src->stolen->start;
 525                         offset += i << PAGE_SHIFT;
 526
 527                         memcpy_fromio(d, (void __iomem *) offset, PAGE_SIZE);
 528                 } else {
 529                         struct page *page;
 530                         void *s;
 531
 532                         page = i915_gem_object_get_page(src, i);
 533
 534                         drm_clflush_pages(&page, 1);
 535
 536                         s = kmap_atomic(page);
 537                         memcpy(d, s, PAGE_SIZE);
 538                         kunmap_atomic(s);
 539
 540                         drm_clflush_pages(&page, 1);
 541                 }
 542                 local_irq_restore(flags);
 543
 544                 dst->pages[i] = d;
 545
 546                 reloc_offset += PAGE_SIZE;
 547         }
 548         dst->page_count = num_pages;
 549
 550         return dst;
 551
 552 unwind:
 553         while (i--)
 554                 kfree(dst->pages[i]);
 555         kfree(dst);
 556         return NULL;
 557 }
 558 #define i915_error_object_create(dev_priv, src) \
 559         i915_error_object_create_sized((dev_priv), (src), \
 560                                        (src)->base.size>>PAGE_SHIFT)
 561
 562 static void capture_bo(struct drm_i915_error_buffer *err,
 563                        struct drm_i915_gem_object *obj)
 564 {
 565         err->size = obj->base.size;
 566         err->name = obj->base.name;
 567         err->rseqno = obj->last_read_seqno;
 568         err->wseqno = obj->last_write_seqno;
 569         err->gtt_offset = i915_gem_obj_ggtt_offset(obj);
 570         err->read_domains = obj->base.read_domains;
 571         err->write_domain = obj->base.write_domain;
 572         err->fence_reg = obj->fence_reg;
 573         err->pinned = 0;
 574         if (obj->pin_count > 0)
 575                 err->pinned = 1;
 576         if (obj->user_pin_count > 0)
 577                 err->pinned = -1;
 578         err->tiling = obj->tiling_mode;
 579         err->dirty = obj->dirty;
 580         err->purgeable = obj->madv != I915_MADV_WILLNEED;
 581         err->ring = obj->ring ? obj->ring->id : -1;
 582         err->cache_level = obj->cache_level;
 583 }
 584
 585 static u32 capture_active_bo(struct drm_i915_error_buffer *err,
 586                              int count, struct list_head *head)
 587 {
 588         struct i915_vma *vma;
 589         int i = 0;
 590
 591         list_for_each_entry(vma, head, mm_list) {
 592                 capture_bo(err++, vma->obj);
 593                 if (++i == count)
 594                         break;
 595         }
 596
 597         return i;
 598 }
 599
 600 static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
 601                              int count, struct list_head *head)
 602 {
 603         struct drm_i915_gem_object *obj;
 604         int i = 0;
 605
 606         list_for_each_entry(obj, head, global_list) {
 607                 if (obj->pin_count == 0)
 608                         continue;
 609
 610                 capture_bo(err++, obj);
 611                 if (++i == count)
 612                         break;
 613         }
 614
 615         return i;
 616 }
 617
 618 static void i915_gem_record_fences(struct drm_device *dev,
 619                                    struct drm_i915_error_state *error)
 620 {
 621         struct drm_i915_private *dev_priv = dev->dev_private;
 622         int i;
 623
 624         /* Fences */
 625         switch (INTEL_INFO(dev)->gen) {
 626         case 7:
 627         case 6:
 628                 for (i = 0; i < dev_priv->num_fence_regs; i++)
 629                         error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
 630                 break;
 631         case 5:
 632         case 4:
 633                 for (i = 0; i < 16; i++)
 634                         error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
 635                 break;
 636         case 3:
 637                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
 638                         for (i = 0; i < 8; i++)
 639                                 error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
 640         case 2:
 641                 for (i = 0; i < 8; i++)
 642                         error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
 643                 break;
 644
 645         default:
 646                 BUG();
 647         }
 648 }
 649
 650 static struct drm_i915_error_object *
 651 i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
 652                              struct intel_ring_buffer *ring)
 653 {
 654         struct i915_address_space *vm;
 655         struct i915_vma *vma;
 656         struct drm_i915_gem_object *obj;
 657         u32 seqno;
 658
 659         if (!ring->get_seqno)
 660                 return NULL;
 661
 662         if (HAS_BROKEN_CS_TLB(dev_priv->dev)) {
 663                 u32 acthd = I915_READ(ACTHD);
 664
 665                 if (WARN_ON(ring->id != RCS))
 666                         return NULL;
 667
 668                 obj = ring->scratch.obj;
 669                 if (acthd >= i915_gem_obj_ggtt_offset(obj) &&
 670                     acthd < i915_gem_obj_ggtt_offset(obj) + obj->base.size)
 671                         return i915_error_object_create(dev_priv, obj);
 672         }
 673
 674         seqno = ring->get_seqno(ring, false);
 675         list_for_each_entry(vm, &dev_priv->vm_list, global_link) {
 676                 list_for_each_entry(vma, &vm->active_list, mm_list) {
 677                         obj = vma->obj;
 678                         if (obj->ring != ring)
 679                                 continue;
 680
 681                         if (i915_seqno_passed(seqno, obj->last_read_seqno))
 682                                 continue;
 683
 684                         if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
 685                                 continue;
 686
 687                         /* We need to copy these to an anonymous buffer as the simplest
 688                          * method to avoid being overwritten by userspace.
 689                          */
 690                         return i915_error_object_create(dev_priv, obj);
 691                 }
 692         }
 693
 694         return NULL;
 695 }
 696
 697 static void i915_record_ring_state(struct drm_device *dev,
 698                                    struct drm_i915_error_state *error,
 699                                    struct intel_ring_buffer *ring)
 700 {
 701         struct drm_i915_private *dev_priv = dev->dev_private;
 702
 703         if (INTEL_INFO(dev)->gen >= 6) {
 704                 error->rc_psmi[ring->id] = I915_READ(ring->mmio_base + 0x50);
 705                 error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
 706                 error->semaphore_mboxes[ring->id][0]
 707                         = I915_READ(RING_SYNC_0(ring->mmio_base));
 708                 error->semaphore_mboxes[ring->id][1]
 709                         = I915_READ(RING_SYNC_1(ring->mmio_base));
 710                 error->semaphore_seqno[ring->id][0] = ring->sync_seqno[0];
 711                 error->semaphore_seqno[ring->id][1] = ring->sync_seqno[1];
 712         }
 713
 714         if (HAS_VEBOX(dev)) {
 715                 error->semaphore_mboxes[ring->id][2] =
 716                         I915_READ(RING_SYNC_2(ring->mmio_base));
 717                 error->semaphore_seqno[ring->id][2] = ring->sync_seqno[2];
 718         }
 719
 720         if (INTEL_INFO(dev)->gen >= 4) {
 721                 error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
 722                 error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
 723                 error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
 724                 error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
 725                 error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
 726                 if (ring->id == RCS)
 727                         error->bbaddr = I915_READ64(BB_ADDR);
 728         } else {
 729                 error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
 730                 error->ipeir[ring->id] = I915_READ(IPEIR);
 731                 error->ipehr[ring->id] = I915_READ(IPEHR);
 732                 error->instdone[ring->id] = I915_READ(INSTDONE);
 733         }
 734
 735         error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
 736         error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
 737         error->seqno[ring->id] = ring->get_seqno(ring, false);
 738         error->acthd[ring->id] = intel_ring_get_active_head(ring);
 739         error->head[ring->id] = I915_READ_HEAD(ring);
 740         error->tail[ring->id] = I915_READ_TAIL(ring);
 741         error->ctl[ring->id] = I915_READ_CTL(ring);
 742
 743         error->cpu_ring_head[ring->id] = ring->head;
 744         error->cpu_ring_tail[ring->id] = ring->tail;
 745
 746         error->hangcheck_score[ring->id] = ring->hangcheck.score;
 747         error->hangcheck_action[ring->id] = ring->hangcheck.action;
 748 }
 749
 750
 751 static void i915_gem_record_active_context(struct intel_ring_buffer *ring,
 752                                            struct drm_i915_error_state *error,
 753                                            struct drm_i915_error_ring *ering)
 754 {
 755         struct drm_i915_private *dev_priv = ring->dev->dev_private;
 756         struct drm_i915_gem_object *obj;
 757
 758         /* Currently render ring is the only HW context user */
 759         if (ring->id != RCS || !error->ccid)
 760                 return;
 761
 762         list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
 763                 if ((error->ccid & PAGE_MASK) == i915_gem_obj_ggtt_offset(obj)) {
 764                         ering->ctx = i915_error_object_create_sized(dev_priv,
 765                                                                     obj, 1);
 766                         break;
 767                 }
 768         }
 769 }
 770
 771 static void i915_gem_record_rings(struct drm_device *dev,
 772                                   struct drm_i915_error_state *error)
 773 {
 774         struct drm_i915_private *dev_priv = dev->dev_private;
 775         struct intel_ring_buffer *ring;
 776         struct drm_i915_gem_request *request;
 777         int i, count;
 778
 779         for_each_ring(ring, dev_priv, i) {
 780                 i915_record_ring_state(dev, error, ring);
 781
 782                 error->ring[i].batchbuffer =
 783                         i915_error_first_batchbuffer(dev_priv, ring);
 784
 785                 error->ring[i].ringbuffer =
 786                         i915_error_object_create(dev_priv, ring->obj);
 787
 788
 789                 i915_gem_record_active_context(ring, error, &error->ring[i]);
 790
 791                 count = 0;
 792                 list_for_each_entry(request, &ring->request_list, list)
 793                         count++;
 794
 795                 error->ring[i].num_requests = count;
 796                 error->ring[i].requests =
 797                         kcalloc(count, sizeof(*error->ring[i].requests),
 798                                 GFP_ATOMIC);
 799                 if (error->ring[i].requests == NULL) {
 800                         error->ring[i].num_requests = 0;
 801                         continue;
 802                 }
 803
 804                 count = 0;
 805                 list_for_each_entry(request, &ring->request_list, list) {
 806                         struct drm_i915_error_request *erq;
 807
 808                         erq = &error->ring[i].requests[count++];
 809                         erq->seqno = request->seqno;
 810                         erq->jiffies = request->emitted_jiffies;
 811                         erq->tail = request->tail;
 812                 }
 813         }
 814 }
 815
 816 /* FIXME: Since pin count/bound list is global, we duplicate what we capture per
 817  * VM.
 818  */
 819 static void i915_gem_capture_vm(struct drm_i915_private *dev_priv,
 820                                 struct drm_i915_error_state *error,
 821                                 struct i915_address_space *vm,
 822                                 const int ndx)
 823 {
 824         struct drm_i915_error_buffer *active_bo = NULL, *pinned_bo = NULL;
 825         struct drm_i915_gem_object *obj;
 826         struct i915_vma *vma;
 827         int i;
 828
 829         i = 0;
 830         list_for_each_entry(vma, &vm->active_list, mm_list)
 831                 i++;
 832         error->active_bo_count[ndx] = i;
 833         list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list)
 834                 if (obj->pin_count)
 835                         i++;
 836         error->pinned_bo_count[ndx] = i - error->active_bo_count[ndx];
 837
 838         if (i) {
 839                 active_bo = kcalloc(i, sizeof(*active_bo), GFP_ATOMIC);
 840                 if (active_bo)
 841                         pinned_bo = active_bo + error->active_bo_count[ndx];
 842         }
 843
 844         if (active_bo)
 845                 error->active_bo_count[ndx] =
 846                         capture_active_bo(active_bo,
 847                                           error->active_bo_count[ndx],
 848                                           &vm->active_list);
 849
 850         if (pinned_bo)
 851                 error->pinned_bo_count[ndx] =
 852                         capture_pinned_bo(pinned_bo,
 853                                           error->pinned_bo_count[ndx],
 854                                           &dev_priv->mm.bound_list);
 855         error->active_bo[ndx] = active_bo;
 856         error->pinned_bo[ndx] = pinned_bo;
 857 }
 858
 859 static void i915_gem_capture_buffers(struct drm_i915_private *dev_priv,
 860                                      struct drm_i915_error_state *error)
 861 {
 862         struct i915_address_space *vm;
 863         int cnt = 0, i = 0;
 864
 865         list_for_each_entry(vm, &dev_priv->vm_list, global_link)
 866                 cnt++;
 867
 868         if (WARN(cnt > 1, "Multiple VMs not yet supported\n"))
 869                 cnt = 1;
 870
 871         vm = &dev_priv->gtt.base;
 872
 873         error->active_bo = kcalloc(cnt, sizeof(*error->active_bo), GFP_ATOMIC);
 874         error->pinned_bo = kcalloc(cnt, sizeof(*error->pinned_bo), GFP_ATOMIC);
 875         error->active_bo_count = kcalloc(cnt, sizeof(*error->active_bo_count),
 876                                          GFP_ATOMIC);
 877         error->pinned_bo_count = kcalloc(cnt, sizeof(*error->pinned_bo_count),
 878                                          GFP_ATOMIC);
 879
 880         list_for_each_entry(vm, &dev_priv->vm_list, global_link)
 881                 i915_gem_capture_vm(dev_priv, error, vm, i++);
 882 }
 883
 884 /**
 885  * i915_capture_error_state - capture an error record for later analysis
 886  * @dev: drm device
 887  *
 888  * Should be called when an error is detected (either a hang or an error
 889  * interrupt) to capture error state from the time of the error.  Fills
 890  * out a structure which becomes available in debugfs for user level tools
 891  * to pick up.
 892  */
 893 void i915_capture_error_state(struct drm_device *dev)
 894 {
 895         struct drm_i915_private *dev_priv = dev->dev_private;
 896         struct drm_i915_error_state *error;
 897         unsigned long flags;
 898         int pipe;
 899
 900         spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
 901         error = dev_priv->gpu_error.first_error;
 902         spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
 903         if (error)
 904                 return;
 905
 906         /* Account for pipe specific data like PIPE*STAT */
 907         error = kzalloc(sizeof(*error), GFP_ATOMIC);
 908         if (!error) {
 909                 DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
 910                 return;
 911         }
 912
 913         DRM_INFO("GPU crash dump saved to /sys/class/drm/card%d/error\n",
 914                  dev->primary->index);
 915         DRM_INFO("GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.\n");
 916         DRM_INFO("Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel\n");
 917         DRM_INFO("drm/i915 developers can then reassign to the right component if it's not a kernel issue.\n");
 918         DRM_INFO("The gpu crash dump is required to analyze gpu hangs, so please always attach it.\n");
 919
 920         kref_init(&error->ref);
 921         error->eir = I915_READ(EIR);
 922         error->pgtbl_er = I915_READ(PGTBL_ER);
 923         if (HAS_HW_CONTEXTS(dev))
 924                 error->ccid = I915_READ(CCID);
 925
 926         if (HAS_PCH_SPLIT(dev))
 927                 error->ier = I915_READ(DEIER) | I915_READ(GTIER);
 928         else if (IS_VALLEYVIEW(dev))
 929                 error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
 930         else if (IS_GEN2(dev))
 931                 error->ier = I915_READ16(IER);
 932         else
 933                 error->ier = I915_READ(IER);
 934
 935         if (INTEL_INFO(dev)->gen >= 6)
 936                 error->derrmr = I915_READ(DERRMR);
 937
 938         if (IS_VALLEYVIEW(dev))
 939                 error->forcewake = I915_READ(FORCEWAKE_VLV);
 940         else if (INTEL_INFO(dev)->gen >= 7)
 941                 error->forcewake = I915_READ(FORCEWAKE_MT);
 942         else if (INTEL_INFO(dev)->gen == 6)
 943                 error->forcewake = I915_READ(FORCEWAKE);
 944
 945         if (!HAS_PCH_SPLIT(dev))
 946                 for_each_pipe(pipe)
 947                         error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
 948
 949         if (INTEL_INFO(dev)->gen >= 6) {
 950                 error->error = I915_READ(ERROR_GEN6);
 951                 error->done_reg = I915_READ(DONE_REG);
 952         }
 953
 954         if (INTEL_INFO(dev)->gen == 7)
 955                 error->err_int = I915_READ(GEN7_ERR_INT);
 956
 957         i915_get_extra_instdone(dev, error->extra_instdone);
 958
 959         i915_gem_capture_buffers(dev_priv, error);
 960         i915_gem_record_fences(dev, error);
 961         i915_gem_record_rings(dev, error);
 962
 963         do_gettimeofday(&error->time);
 964
 965         error->overlay = intel_overlay_capture_error_state(dev);
 966         error->display = intel_display_capture_error_state(dev);
 967
 968         spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
 969         if (dev_priv->gpu_error.first_error == NULL) {
 970                 dev_priv->gpu_error.first_error = error;
 971                 error = NULL;
 972         }
 973         spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
 974
 975         if (error)
 976                 i915_error_state_free(&error->ref);
 977 }
 978
 979 void i915_error_state_get(struct drm_device *dev,
 980                           struct i915_error_state_file_priv *error_priv)
 981 {
 982         struct drm_i915_private *dev_priv = dev->dev_private;
 983         unsigned long flags;
 984
 985         spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
 986         error_priv->error = dev_priv->gpu_error.first_error;
 987         if (error_priv->error)
 988                 kref_get(&error_priv->error->ref);
 989         spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
 990
 991 }
 992
 993 void i915_error_state_put(struct i915_error_state_file_priv *error_priv)
 994 {
 995         if (error_priv->error)
 996                 kref_put(&error_priv->error->ref, i915_error_state_free);
 997 }
 998
 999 void i915_destroy_error_state(struct drm_device *dev)
1000 {
1001         struct drm_i915_private *dev_priv = dev->dev_private;
1002         struct drm_i915_error_state *error;
1003         unsigned long flags;
1004
1005         spin_lock_irqsave(&dev_priv->gpu_error.lock, flags);
1006         error = dev_priv->gpu_error.first_error;
1007         dev_priv->gpu_error.first_error = NULL;
1008         spin_unlock_irqrestore(&dev_priv->gpu_error.lock, flags);
1009
1010         if (error)
1011                 kref_put(&error->ref, i915_error_state_free);
1012 }
1013
1014 const char *i915_cache_level_str(int type)
1015 {
1016         switch (type) {
1017         case I915_CACHE_NONE: return " uncached";
1018         case I915_CACHE_LLC: return " snooped or LLC";
1019         case I915_CACHE_L3_LLC: return " L3+LLC";
1020         case I915_CACHE_WT: return " WT";
1021         default: return "";
1022         }
1023 }
1024
1025 /* NB: please notice the memset */
1026 void i915_get_extra_instdone(struct drm_device *dev, uint32_t *instdone)
1027 {
1028         struct drm_i915_private *dev_priv = dev->dev_private;
1029         memset(instdone, 0, sizeof(*instdone) * I915_NUM_INSTDONE_REG);
1030
1031         switch (INTEL_INFO(dev)->gen) {
1032         case 2:
1033         case 3:
1034                 instdone[0] = I915_READ(INSTDONE);
1035                 break;
1036         case 4:
1037         case 5:
1038         case 6:
1039                 instdone[0] = I915_READ(INSTDONE_I965);
1040                 instdone[1] = I915_READ(INSTDONE1);
1041                 break;
1042         default:
1043                 WARN_ONCE(1, "Unsupported platform\n");
1044         case 7:
1045                 instdone[0] = I915_READ(GEN7_INSTDONE_1);
1046                 instdone[1] = I915_READ(GEN7_SC_INSTDONE);
1047                 instdone[2] = I915_READ(GEN7_SAMPLER_INSTDONE);
1048                 instdone[3] = I915_READ(GEN7_ROW_INSTDONE);
1049                 break;
1050         }
1051 }