drivers/gpu/drm/nouveau/nouveau_gem.c

   1 /*
   2  * Copyright (C) 2008 Ben Skeggs.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26 #include "drmP.h"
  27 #include "drm.h"
  28
  29 #include "nouveau_drv.h"
  30 #include "nouveau_drm.h"
  31 #include "nouveau_dma.h"
  32
  33 #define nouveau_gem_pushbuf_sync(chan) 0
  34
  35 int
  36 nouveau_gem_object_new(struct drm_gem_object *gem)
  37 {
  38         return 0;
  39 }
  40
  41 void
  42 nouveau_gem_object_del(struct drm_gem_object *gem)
  43 {
  44         struct nouveau_bo *nvbo = gem->driver_private;
  45         struct ttm_buffer_object *bo = &nvbo->bo;
  46
  47         if (!nvbo)
  48                 return;
  49         nvbo->gem = NULL;
  50
  51         if (unlikely(nvbo->cpu_filp))
  52                 ttm_bo_synccpu_write_release(bo);
  53
  54         if (unlikely(nvbo->pin_refcnt)) {
  55                 nvbo->pin_refcnt = 1;
  56                 nouveau_bo_unpin(nvbo);
  57         }
  58
  59         ttm_bo_unref(&bo);
  60
  61         drm_gem_object_release(gem);
  62         kfree(gem);
  63 }
  64
  65 int
  66 nouveau_gem_new(struct drm_device *dev, struct nouveau_channel *chan,
  67                 int size, int align, uint32_t flags, uint32_t tile_mode,
  68                 uint32_t tile_flags, bool no_vm, bool mappable,
  69                 struct nouveau_bo **pnvbo)
  70 {
  71         struct nouveau_bo *nvbo;
  72         int ret;
  73
  74         ret = nouveau_bo_new(dev, chan, size, align, flags, tile_mode,
  75                              tile_flags, no_vm, mappable, pnvbo);
  76         if (ret)
  77                 return ret;
  78         nvbo = *pnvbo;
  79
  80         nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size);
  81         if (!nvbo->gem) {
  82                 nouveau_bo_ref(NULL, pnvbo);
  83                 return -ENOMEM;
  84         }
  85
  86         nvbo->bo.persistant_swap_storage = nvbo->gem->filp;
  87         nvbo->gem->driver_private = nvbo;
  88         return 0;
  89 }
  90
  91 static int
  92 nouveau_gem_info(struct drm_gem_object *gem, struct drm_nouveau_gem_info *rep)
  93 {
  94         struct nouveau_bo *nvbo = nouveau_gem_object(gem);
  95
  96         if (nvbo->bo.mem.mem_type == TTM_PL_TT)
  97                 rep->domain = NOUVEAU_GEM_DOMAIN_GART;
  98         else
  99                 rep->domain = NOUVEAU_GEM_DOMAIN_VRAM;
 100
 101         rep->size = nvbo->bo.mem.num_pages << PAGE_SHIFT;
 102         rep->offset = nvbo->bo.offset;
 103         rep->map_handle = nvbo->mappable ? nvbo->bo.addr_space_offset : 0;
 104         rep->tile_mode = nvbo->tile_mode;
 105         rep->tile_flags = nvbo->tile_flags;
 106         return 0;
 107 }
 108
 109 static bool
 110 nouveau_gem_tile_flags_valid(struct drm_device *dev, uint32_t tile_flags) {
 111         switch (tile_flags) {
 112         case 0x0000:
 113         case 0x1800:
 114         case 0x2800:
 115         case 0x4800:
 116         case 0x7000:
 117         case 0x7400:
 118         case 0x7a00:
 119         case 0xe000:
 120                 break;
 121         default:
 122                 NV_ERROR(dev, "bad page flags: 0x%08x\n", tile_flags);
 123                 return false;
 124         }
 125
 126         return true;
 127 }
 128
 129 int
 130 nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
 131                       struct drm_file *file_priv)
 132 {
 133         struct drm_nouveau_private *dev_priv = dev->dev_private;
 134         struct drm_nouveau_gem_new *req = data;
 135         struct nouveau_bo *nvbo = NULL;
 136         struct nouveau_channel *chan = NULL;
 137         uint32_t flags = 0;
 138         int ret = 0;
 139
 140         if (unlikely(dev_priv->ttm.bdev.dev_mapping == NULL))
 141                 dev_priv->ttm.bdev.dev_mapping = dev_priv->dev->dev_mapping;
 142
 143         if (req->channel_hint) {
 144                 NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel_hint,
 145                                                      file_priv, chan);
 146         }
 147
 148         if (req->info.domain & NOUVEAU_GEM_DOMAIN_VRAM)
 149                 flags |= TTM_PL_FLAG_VRAM;
 150         if (req->info.domain & NOUVEAU_GEM_DOMAIN_GART)
 151                 flags |= TTM_PL_FLAG_TT;
 152         if (!flags || req->info.domain & NOUVEAU_GEM_DOMAIN_CPU)
 153                 flags |= TTM_PL_FLAG_SYSTEM;
 154
 155         if (!nouveau_gem_tile_flags_valid(dev, req->info.tile_flags))
 156                 return -EINVAL;
 157
 158         ret = nouveau_gem_new(dev, chan, req->info.size, req->align, flags,
 159                               req->info.tile_mode, req->info.tile_flags, false,
 160                               (req->info.domain & NOUVEAU_GEM_DOMAIN_MAPPABLE),
 161                               &nvbo);
 162         if (ret)
 163                 return ret;
 164
 165         ret = nouveau_gem_info(nvbo->gem, &req->info);
 166         if (ret)
 167                 goto out;
 168
 169         ret = drm_gem_handle_create(file_priv, nvbo->gem, &req->info.handle);
 170         /* drop reference from allocate - handle holds it now */
 171         drm_gem_object_unreference_unlocked(nvbo->gem);
 172 out:
 173         return ret;
 174 }
 175
 176 static int
 177 nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains,
 178                        uint32_t write_domains, uint32_t valid_domains)
 179 {
 180         struct nouveau_bo *nvbo = gem->driver_private;
 181         struct ttm_buffer_object *bo = &nvbo->bo;
 182         uint32_t domains = valid_domains &
 183                 (write_domains ? write_domains : read_domains);
 184         uint32_t pref_flags = 0, valid_flags = 0;
 185
 186         if (!domains)
 187                 return -EINVAL;
 188
 189         if (valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 190                 valid_flags |= TTM_PL_FLAG_VRAM;
 191
 192         if (valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 193                 valid_flags |= TTM_PL_FLAG_TT;
 194
 195         if ((domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 196             bo->mem.mem_type == TTM_PL_VRAM)
 197                 pref_flags |= TTM_PL_FLAG_VRAM;
 198
 199         else if ((domains & NOUVEAU_GEM_DOMAIN_GART) &&
 200                  bo->mem.mem_type == TTM_PL_TT)
 201                 pref_flags |= TTM_PL_FLAG_TT;
 202
 203         else if (domains & NOUVEAU_GEM_DOMAIN_VRAM)
 204                 pref_flags |= TTM_PL_FLAG_VRAM;
 205
 206         else
 207                 pref_flags |= TTM_PL_FLAG_TT;
 208
 209         nouveau_bo_placement_set(nvbo, pref_flags, valid_flags);
 210
 211         return 0;
 212 }
 213
 214 struct validate_op {
 215         struct list_head vram_list;
 216         struct list_head gart_list;
 217         struct list_head both_list;
 218 };
 219
 220 static void
 221 validate_fini_list(struct list_head *list, struct nouveau_fence *fence)
 222 {
 223         struct list_head *entry, *tmp;
 224         struct nouveau_bo *nvbo;
 225
 226         list_for_each_safe(entry, tmp, list) {
 227                 nvbo = list_entry(entry, struct nouveau_bo, entry);
 228                 if (likely(fence)) {
 229                         struct nouveau_fence *prev_fence;
 230
 231                         spin_lock(&nvbo->bo.lock);
 232                         prev_fence = nvbo->bo.sync_obj;
 233                         nvbo->bo.sync_obj = nouveau_fence_ref(fence);
 234                         spin_unlock(&nvbo->bo.lock);
 235                         nouveau_fence_unref((void *)&prev_fence);
 236                 }
 237
 238                 if (unlikely(nvbo->validate_mapped)) {
 239                         ttm_bo_kunmap(&nvbo->kmap);
 240                         nvbo->validate_mapped = false;
 241                 }
 242
 243                 list_del(&nvbo->entry);
 244                 nvbo->reserved_by = NULL;
 245                 ttm_bo_unreserve(&nvbo->bo);
 246                 drm_gem_object_unreference_unlocked(nvbo->gem);
 247         }
 248 }
 249
 250 static void
 251 validate_fini(struct validate_op *op, struct nouveau_fence* fence)
 252 {
 253         validate_fini_list(&op->vram_list, fence);
 254         validate_fini_list(&op->gart_list, fence);
 255         validate_fini_list(&op->both_list, fence);
 256 }
 257
 258 static int
 259 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
 260               struct drm_nouveau_gem_pushbuf_bo *pbbo,
 261               int nr_buffers, struct validate_op *op)
 262 {
 263         struct drm_device *dev = chan->dev;
 264         struct drm_nouveau_private *dev_priv = dev->dev_private;
 265         uint32_t sequence;
 266         int trycnt = 0;
 267         int ret, i;
 268
 269         sequence = atomic_add_return(1, &dev_priv->ttm.validate_sequence);
 270 retry:
 271         if (++trycnt > 100000) {
 272                 NV_ERROR(dev, "%s failed and gave up.\n", __func__);
 273                 return -EINVAL;
 274         }
 275
 276         for (i = 0; i < nr_buffers; i++) {
 277                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
 278                 struct drm_gem_object *gem;
 279                 struct nouveau_bo *nvbo;
 280
 281                 gem = drm_gem_object_lookup(dev, file_priv, b->handle);
 282                 if (!gem) {
 283                         NV_ERROR(dev, "Unknown handle 0x%08x\n", b->handle);
 284                         validate_fini(op, NULL);
 285                         return -ENOENT;
 286                 }
 287                 nvbo = gem->driver_private;
 288
 289                 if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
 290                         NV_ERROR(dev, "multiple instances of buffer %d on "
 291                                       "validation list\n", b->handle);
 292                         validate_fini(op, NULL);
 293                         return -EINVAL;
 294                 }
 295
 296                 ret = ttm_bo_reserve(&nvbo->bo, false, false, true, sequence);
 297                 if (ret) {
 298                         validate_fini(op, NULL);
 299                         if (ret == -EAGAIN)
 300                                 ret = ttm_bo_wait_unreserved(&nvbo->bo, false);
 301                         drm_gem_object_unreference_unlocked(gem);
 302                         if (ret) {
 303                                 NV_ERROR(dev, "fail reserve\n");
 304                                 return ret;
 305                         }
 306                         goto retry;
 307                 }
 308
 309                 b->user_priv = (uint64_t)(unsigned long)nvbo;
 310                 nvbo->reserved_by = file_priv;
 311                 nvbo->pbbo_index = i;
 312                 if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 313                     (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
 314                         list_add_tail(&nvbo->entry, &op->both_list);
 315                 else
 316                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 317                         list_add_tail(&nvbo->entry, &op->vram_list);
 318                 else
 319                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 320                         list_add_tail(&nvbo->entry, &op->gart_list);
 321                 else {
 322                         NV_ERROR(dev, "invalid valid domains: 0x%08x\n",
 323                                  b->valid_domains);
 324                         list_add_tail(&nvbo->entry, &op->both_list);
 325                         validate_fini(op, NULL);
 326                         return -EINVAL;
 327                 }
 328
 329                 if (unlikely(atomic_read(&nvbo->bo.cpu_writers) > 0)) {
 330                         validate_fini(op, NULL);
 331
 332                         if (nvbo->cpu_filp == file_priv) {
 333                                 NV_ERROR(dev, "bo %p mapped by process trying "
 334                                               "to validate it!\n", nvbo);
 335                                 return -EINVAL;
 336                         }
 337
 338                         mutex_unlock(&drm_global_mutex);
 339                         ret = ttm_bo_wait_cpu(&nvbo->bo, false);
 340                         mutex_lock(&drm_global_mutex);
 341                         if (ret) {
 342                                 NV_ERROR(dev, "fail wait_cpu\n");
 343                                 return ret;
 344                         }
 345                         goto retry;
 346                 }
 347         }
 348
 349         return 0;
 350 }
 351
 352 static int
 353 validate_list(struct nouveau_channel *chan, struct list_head *list,
 354               struct drm_nouveau_gem_pushbuf_bo *pbbo, uint64_t user_pbbo_ptr)
 355 {
 356         struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
 357                                 (void __force __user *)(uintptr_t)user_pbbo_ptr;
 358         struct drm_device *dev = chan->dev;
 359         struct nouveau_bo *nvbo;
 360         int ret, relocs = 0;
 361
 362         list_for_each_entry(nvbo, list, entry) {
 363                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
 364
 365                 ret = nouveau_bo_sync_gpu(nvbo, chan);
 366                 if (unlikely(ret)) {
 367                         NV_ERROR(dev, "fail pre-validate sync\n");
 368                         return ret;
 369                 }
 370
 371                 ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
 372                                              b->write_domains,
 373                                              b->valid_domains);
 374                 if (unlikely(ret)) {
 375                         NV_ERROR(dev, "fail set_domain\n");
 376                         return ret;
 377                 }
 378
 379                 nvbo->channel = (b->read_domains & (1 << 31)) ? NULL : chan;
 380                 ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 381                                       false, false, false);
 382                 nvbo->channel = NULL;
 383                 if (unlikely(ret)) {
 384                         NV_ERROR(dev, "fail ttm_validate\n");
 385                         return ret;
 386                 }
 387
 388                 ret = nouveau_bo_sync_gpu(nvbo, chan);
 389                 if (unlikely(ret)) {
 390                         NV_ERROR(dev, "fail post-validate sync\n");
 391                         return ret;
 392                 }
 393
 394                 if (nvbo->bo.offset == b->presumed.offset &&
 395                     ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
 396                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
 397                      (nvbo->bo.mem.mem_type == TTM_PL_TT &&
 398                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
 399                         continue;
 400
 401                 if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 402                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
 403                 else
 404                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
 405                 b->presumed.offset = nvbo->bo.offset;
 406                 b->presumed.valid = 0;
 407                 relocs++;
 408
 409                 if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index].presumed,
 410                                      &b->presumed, sizeof(b->presumed)))
 411                         return -EFAULT;
 412         }
 413
 414         return relocs;
 415 }
 416
 417 static int
 418 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 419                              struct drm_file *file_priv,
 420                              struct drm_nouveau_gem_pushbuf_bo *pbbo,
 421                              uint64_t user_buffers, int nr_buffers,
 422                              struct validate_op *op, int *apply_relocs)
 423 {
 424         struct drm_device *dev = chan->dev;
 425         int ret, relocs = 0;
 426
 427         INIT_LIST_HEAD(&op->vram_list);
 428         INIT_LIST_HEAD(&op->gart_list);
 429         INIT_LIST_HEAD(&op->both_list);
 430
 431         if (nr_buffers == 0)
 432                 return 0;
 433
 434         ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
 435         if (unlikely(ret)) {
 436                 NV_ERROR(dev, "validate_init\n");
 437                 return ret;
 438         }
 439
 440         ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
 441         if (unlikely(ret < 0)) {
 442                 NV_ERROR(dev, "validate vram_list\n");
 443                 validate_fini(op, NULL);
 444                 return ret;
 445         }
 446         relocs += ret;
 447
 448         ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
 449         if (unlikely(ret < 0)) {
 450                 NV_ERROR(dev, "validate gart_list\n");
 451                 validate_fini(op, NULL);
 452                 return ret;
 453         }
 454         relocs += ret;
 455
 456         ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
 457         if (unlikely(ret < 0)) {
 458                 NV_ERROR(dev, "validate both_list\n");
 459                 validate_fini(op, NULL);
 460                 return ret;
 461         }
 462         relocs += ret;
 463
 464         *apply_relocs = relocs;
 465         return 0;
 466 }
 467
 468 static inline void *
 469 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
 470 {
 471         void *mem;
 472         void __user *userptr = (void __force __user *)(uintptr_t)user;
 473
 474         mem = kmalloc(nmemb * size, GFP_KERNEL);
 475         if (!mem)
 476                 return ERR_PTR(-ENOMEM);
 477
 478         if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
 479                 kfree(mem);
 480                 return ERR_PTR(-EFAULT);
 481         }
 482
 483         return mem;
 484 }
 485
 486 static int
 487 nouveau_gem_pushbuf_reloc_apply(struct drm_device *dev,
 488                                 struct drm_nouveau_gem_pushbuf *req,
 489                                 struct drm_nouveau_gem_pushbuf_bo *bo)
 490 {
 491         struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
 492         int ret = 0;
 493         unsigned i;
 494
 495         reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
 496         if (IS_ERR(reloc))
 497                 return PTR_ERR(reloc);
 498
 499         for (i = 0; i < req->nr_relocs; i++) {
 500                 struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
 501                 struct drm_nouveau_gem_pushbuf_bo *b;
 502                 struct nouveau_bo *nvbo;
 503                 uint32_t data;
 504
 505                 if (unlikely(r->bo_index > req->nr_buffers)) {
 506                         NV_ERROR(dev, "reloc bo index invalid\n");
 507                         ret = -EINVAL;
 508                         break;
 509                 }
 510
 511                 b = &bo[r->bo_index];
 512                 if (b->presumed.valid)
 513                         continue;
 514
 515                 if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
 516                         NV_ERROR(dev, "reloc container bo index invalid\n");
 517                         ret = -EINVAL;
 518                         break;
 519                 }
 520                 nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
 521
 522                 if (unlikely(r->reloc_bo_offset + 4 >
 523                              nvbo->bo.mem.num_pages << PAGE_SHIFT)) {
 524                         NV_ERROR(dev, "reloc outside of bo\n");
 525                         ret = -EINVAL;
 526                         break;
 527                 }
 528
 529                 if (!nvbo->kmap.virtual) {
 530                         ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages,
 531                                           &nvbo->kmap);
 532                         if (ret) {
 533                                 NV_ERROR(dev, "failed kmap for reloc\n");
 534                                 break;
 535                         }
 536                         nvbo->validate_mapped = true;
 537                 }
 538
 539                 if (r->flags & NOUVEAU_GEM_RELOC_LOW)
 540                         data = b->presumed.offset + r->data;
 541                 else
 542                 if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
 543                         data = (b->presumed.offset + r->data) >> 32;
 544                 else
 545                         data = r->data;
 546
 547                 if (r->flags & NOUVEAU_GEM_RELOC_OR) {
 548                         if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
 549                                 data |= r->tor;
 550                         else
 551                                 data |= r->vor;
 552                 }
 553
 554                 spin_lock(&nvbo->bo.lock);
 555                 ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 556                 spin_unlock(&nvbo->bo.lock);
 557                 if (ret) {
 558                         NV_ERROR(dev, "reloc wait_idle failed: %d\n", ret);
 559                         break;
 560                 }
 561
 562                 nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
 563         }
 564
 565         kfree(reloc);
 566         return ret;
 567 }
 568
 569 int
 570 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 571                           struct drm_file *file_priv)
 572 {
 573         struct drm_nouveau_private *dev_priv = dev->dev_private;
 574         struct drm_nouveau_gem_pushbuf *req = data;
 575         struct drm_nouveau_gem_pushbuf_push *push;
 576         struct drm_nouveau_gem_pushbuf_bo *bo;
 577         struct nouveau_channel *chan;
 578         struct validate_op op;
 579         struct nouveau_fence *fence = NULL;
 580         int i, j, ret = 0, do_reloc = 0;
 581
 582         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
 583
 584         req->vram_available = dev_priv->fb_aper_free;
 585         req->gart_available = dev_priv->gart_info.aper_free;
 586         if (unlikely(req->nr_push == 0))
 587                 goto out_next;
 588
 589         if (unlikely(req->nr_push > NOUVEAU_GEM_MAX_PUSH)) {
 590                 NV_ERROR(dev, "pushbuf push count exceeds limit: %d max %d\n",
 591                          req->nr_push, NOUVEAU_GEM_MAX_PUSH);
 592                 return -EINVAL;
 593         }
 594
 595         if (unlikely(req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS)) {
 596                 NV_ERROR(dev, "pushbuf bo count exceeds limit: %d max %d\n",
 597                          req->nr_buffers, NOUVEAU_GEM_MAX_BUFFERS);
 598                 return -EINVAL;
 599         }
 600
 601         if (unlikely(req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS)) {
 602                 NV_ERROR(dev, "pushbuf reloc count exceeds limit: %d max %d\n",
 603                          req->nr_relocs, NOUVEAU_GEM_MAX_RELOCS);
 604                 return -EINVAL;
 605         }
 606
 607         push = u_memcpya(req->push, req->nr_push, sizeof(*push));
 608         if (IS_ERR(push))
 609                 return PTR_ERR(push);
 610
 611         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 612         if (IS_ERR(bo)) {
 613                 kfree(push);
 614                 return PTR_ERR(bo);
 615         }
 616
 617         /* Mark push buffers as being used on PFIFO, the validation code
 618          * will then make sure that if the pushbuf bo moves, that they
 619          * happen on the kernel channel, which will in turn cause a sync
 620          * to happen before we try and submit the push buffer.
 621          */
 622         for (i = 0; i < req->nr_push; i++) {
 623                 if (push[i].bo_index >= req->nr_buffers) {
 624                         NV_ERROR(dev, "push %d buffer not in list\n", i);
 625                         ret = -EINVAL;
 626                         goto out;
 627                 }
 628
 629                 bo[push[i].bo_index].read_domains |= (1 << 31);
 630         }
 631
 632         /* Validate buffer list */
 633         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 634                                            req->nr_buffers, &op, &do_reloc);
 635         if (ret) {
 636                 NV_ERROR(dev, "validate: %d\n", ret);
 637                 goto out;
 638         }
 639
 640         /* Apply any relocations that are required */
 641         if (do_reloc) {
 642                 ret = nouveau_gem_pushbuf_reloc_apply(dev, req, bo);
 643                 if (ret) {
 644                         NV_ERROR(dev, "reloc apply: %d\n", ret);
 645                         goto out;
 646                 }
 647         }
 648
 649         if (chan->dma.ib_max) {
 650                 ret = nouveau_dma_wait(chan, req->nr_push + 1, 6);
 651                 if (ret) {
 652                         NV_INFO(dev, "nv50cal_space: %d\n", ret);
 653                         goto out;
 654                 }
 655
 656                 for (i = 0; i < req->nr_push; i++) {
 657                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 658                                 bo[push[i].bo_index].user_priv;
 659
 660                         nv50_dma_push(chan, nvbo, push[i].offset,
 661                                       push[i].length);
 662                 }
 663         } else
 664         if (dev_priv->chipset >= 0x25) {
 665                 ret = RING_SPACE(chan, req->nr_push * 2);
 666                 if (ret) {
 667                         NV_ERROR(dev, "cal_space: %d\n", ret);
 668                         goto out;
 669                 }
 670
 671                 for (i = 0; i < req->nr_push; i++) {
 672                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 673                                 bo[push[i].bo_index].user_priv;
 674                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 675
 676                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 677                                         push[i].offset) | 2);
 678                         OUT_RING(chan, 0);
 679                 }
 680         } else {
 681                 ret = RING_SPACE(chan, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
 682                 if (ret) {
 683                         NV_ERROR(dev, "jmp_space: %d\n", ret);
 684                         goto out;
 685                 }
 686
 687                 for (i = 0; i < req->nr_push; i++) {
 688                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 689                                 bo[push[i].bo_index].user_priv;
 690                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 691                         uint32_t cmd;
 692
 693                         cmd = chan->pushbuf_base + ((chan->dma.cur + 2) << 2);
 694                         cmd |= 0x20000000;
 695                         if (unlikely(cmd != req->suffix0)) {
 696                                 if (!nvbo->kmap.virtual) {
 697                                         ret = ttm_bo_kmap(&nvbo->bo, 0,
 698                                                           nvbo->bo.mem.
 699                                                           num_pages,
 700                                                           &nvbo->kmap);
 701                                         if (ret) {
 702                                                 WIND_RING(chan);
 703                                                 goto out;
 704                                         }
 705                                         nvbo->validate_mapped = true;
 706                                 }
 707
 708                                 nouveau_bo_wr32(nvbo, (push[i].offset +
 709                                                 push[i].length - 8) / 4, cmd);
 710                         }
 711
 712                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 713                                         push[i].offset) | 0x20000000);
 714                         OUT_RING(chan, 0);
 715                         for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
 716                                 OUT_RING(chan, 0);
 717                 }
 718         }
 719
 720         ret = nouveau_fence_new(chan, &fence, true);
 721         if (ret) {
 722                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 723                 WIND_RING(chan);
 724                 goto out;
 725         }
 726
 727 out:
 728         validate_fini(&op, fence);
 729         nouveau_fence_unref((void**)&fence);
 730         kfree(bo);
 731         kfree(push);
 732
 733 out_next:
 734         if (chan->dma.ib_max) {
 735                 req->suffix0 = 0x00000000;
 736                 req->suffix1 = 0x00000000;
 737         } else
 738         if (dev_priv->chipset >= 0x25) {
 739                 req->suffix0 = 0x00020000;
 740                 req->suffix1 = 0x00000000;
 741         } else {
 742                 req->suffix0 = 0x20000000 |
 743                               (chan->pushbuf_base + ((chan->dma.cur + 2) << 2));
 744                 req->suffix1 = 0x00000000;
 745         }
 746
 747         return ret;
 748 }
 749
 750 static inline uint32_t
 751 domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
 752 {
 753         uint32_t flags = 0;
 754
 755         if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
 756                 flags |= TTM_PL_FLAG_VRAM;
 757         if (domain & NOUVEAU_GEM_DOMAIN_GART)
 758                 flags |= TTM_PL_FLAG_TT;
 759
 760         return flags;
 761 }
 762
 763 int
 764 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 765                            struct drm_file *file_priv)
 766 {
 767         struct drm_nouveau_gem_cpu_prep *req = data;
 768         struct drm_gem_object *gem;
 769         struct nouveau_bo *nvbo;
 770         bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
 771         int ret = -EINVAL;
 772
 773         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 774         if (!gem)
 775                 return -ENOENT;
 776         nvbo = nouveau_gem_object(gem);
 777
 778         if (nvbo->cpu_filp) {
 779                 if (nvbo->cpu_filp == file_priv)
 780                         goto out;
 781
 782                 ret = ttm_bo_wait_cpu(&nvbo->bo, no_wait);
 783                 if (ret)
 784                         goto out;
 785         }
 786
 787         if (req->flags & NOUVEAU_GEM_CPU_PREP_NOBLOCK) {
 788                 spin_lock(&nvbo->bo.lock);
 789                 ret = ttm_bo_wait(&nvbo->bo, false, false, no_wait);
 790                 spin_unlock(&nvbo->bo.lock);
 791         } else {
 792                 ret = ttm_bo_synccpu_write_grab(&nvbo->bo, no_wait);
 793                 if (ret == 0)
 794                         nvbo->cpu_filp = file_priv;
 795         }
 796
 797 out:
 798         drm_gem_object_unreference_unlocked(gem);
 799         return ret;
 800 }
 801
 802 int
 803 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 804                            struct drm_file *file_priv)
 805 {
 806         struct drm_nouveau_gem_cpu_prep *req = data;
 807         struct drm_gem_object *gem;
 808         struct nouveau_bo *nvbo;
 809         int ret = -EINVAL;
 810
 811         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 812         if (!gem)
 813                 return -ENOENT;
 814         nvbo = nouveau_gem_object(gem);
 815
 816         if (nvbo->cpu_filp != file_priv)
 817                 goto out;
 818         nvbo->cpu_filp = NULL;
 819
 820         ttm_bo_synccpu_write_release(&nvbo->bo);
 821         ret = 0;
 822
 823 out:
 824         drm_gem_object_unreference_unlocked(gem);
 825         return ret;
 826 }
 827
 828 int
 829 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 830                        struct drm_file *file_priv)
 831 {
 832         struct drm_nouveau_gem_info *req = data;
 833         struct drm_gem_object *gem;
 834         int ret;
 835
 836         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 837         if (!gem)
 838                 return -ENOENT;
 839
 840         ret = nouveau_gem_info(gem, req);
 841         drm_gem_object_unreference_unlocked(gem);
 842         return ret;
 843 }
 844