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->pin_refcnt)) {
  52                 nvbo->pin_refcnt = 1;
  53                 nouveau_bo_unpin(nvbo);
  54         }
  55
  56         ttm_bo_unref(&bo);
  57
  58         drm_gem_object_release(gem);
  59         kfree(gem);
  60 }
  61
  62 int
  63 nouveau_gem_new(struct drm_device *dev, struct nouveau_channel *chan,
  64                 int size, int align, uint32_t flags, uint32_t tile_mode,
  65                 uint32_t tile_flags, bool no_vm, bool mappable,
  66                 struct nouveau_bo **pnvbo)
  67 {
  68         struct nouveau_bo *nvbo;
  69         int ret;
  70
  71         ret = nouveau_bo_new(dev, chan, size, align, flags, tile_mode,
  72                              tile_flags, no_vm, mappable, pnvbo);
  73         if (ret)
  74                 return ret;
  75         nvbo = *pnvbo;
  76
  77         nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size);
  78         if (!nvbo->gem) {
  79                 nouveau_bo_ref(NULL, pnvbo);
  80                 return -ENOMEM;
  81         }
  82
  83         nvbo->bo.persistant_swap_storage = nvbo->gem->filp;
  84         nvbo->gem->driver_private = nvbo;
  85         return 0;
  86 }
  87
  88 static int
  89 nouveau_gem_info(struct drm_gem_object *gem, struct drm_nouveau_gem_info *rep)
  90 {
  91         struct nouveau_bo *nvbo = nouveau_gem_object(gem);
  92
  93         if (nvbo->bo.mem.mem_type == TTM_PL_TT)
  94                 rep->domain = NOUVEAU_GEM_DOMAIN_GART;
  95         else
  96                 rep->domain = NOUVEAU_GEM_DOMAIN_VRAM;
  97
  98         rep->size = nvbo->bo.mem.num_pages << PAGE_SHIFT;
  99         rep->offset = nvbo->bo.offset;
 100         rep->map_handle = nvbo->mappable ? nvbo->bo.addr_space_offset : 0;
 101         rep->tile_mode = nvbo->tile_mode;
 102         rep->tile_flags = nvbo->tile_flags;
 103         return 0;
 104 }
 105
 106 static bool
 107 nouveau_gem_tile_flags_valid(struct drm_device *dev, uint32_t tile_flags)
 108 {
 109         struct drm_nouveau_private *dev_priv = dev->dev_private;
 110
 111         if (dev_priv->card_type >= NV_50) {
 112                 switch (tile_flags & NOUVEAU_GEM_TILE_LAYOUT_MASK) {
 113                 case 0x0000:
 114                 case 0x1800:
 115                 case 0x2800:
 116                 case 0x4800:
 117                 case 0x7000:
 118                 case 0x7400:
 119                 case 0x7a00:
 120                 case 0xe000:
 121                         return true;
 122                 }
 123         } else {
 124                 if (!(tile_flags & NOUVEAU_GEM_TILE_LAYOUT_MASK))
 125                         return true;
 126         }
 127
 128         NV_ERROR(dev, "bad page flags: 0x%08x\n", tile_flags);
 129         return false;
 130 }
 131
 132 int
 133 nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
 134                       struct drm_file *file_priv)
 135 {
 136         struct drm_nouveau_private *dev_priv = dev->dev_private;
 137         struct drm_nouveau_gem_new *req = data;
 138         struct nouveau_bo *nvbo = NULL;
 139         struct nouveau_channel *chan = NULL;
 140         uint32_t flags = 0;
 141         int ret = 0;
 142
 143         if (unlikely(dev_priv->ttm.bdev.dev_mapping == NULL))
 144                 dev_priv->ttm.bdev.dev_mapping = dev_priv->dev->dev_mapping;
 145
 146         if (req->info.domain & NOUVEAU_GEM_DOMAIN_VRAM)
 147                 flags |= TTM_PL_FLAG_VRAM;
 148         if (req->info.domain & NOUVEAU_GEM_DOMAIN_GART)
 149                 flags |= TTM_PL_FLAG_TT;
 150         if (!flags || req->info.domain & NOUVEAU_GEM_DOMAIN_CPU)
 151                 flags |= TTM_PL_FLAG_SYSTEM;
 152
 153         if (!nouveau_gem_tile_flags_valid(dev, req->info.tile_flags))
 154                 return -EINVAL;
 155
 156         if (req->channel_hint) {
 157                 chan = nouveau_channel_get(dev, file_priv, req->channel_hint);
 158                 if (IS_ERR(chan))
 159                         return PTR_ERR(chan);
 160         }
 161
 162         ret = nouveau_gem_new(dev, chan, req->info.size, req->align, flags,
 163                               req->info.tile_mode, req->info.tile_flags, false,
 164                               (req->info.domain & NOUVEAU_GEM_DOMAIN_MAPPABLE),
 165                               &nvbo);
 166         if (chan)
 167                 nouveau_channel_put(&chan);
 168         if (ret)
 169                 return ret;
 170
 171         ret = nouveau_gem_info(nvbo->gem, &req->info);
 172         if (ret)
 173                 goto out;
 174
 175         ret = drm_gem_handle_create(file_priv, nvbo->gem, &req->info.handle);
 176         /* drop reference from allocate - handle holds it now */
 177         drm_gem_object_unreference_unlocked(nvbo->gem);
 178 out:
 179         return ret;
 180 }
 181
 182 static int
 183 nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains,
 184                        uint32_t write_domains, uint32_t valid_domains)
 185 {
 186         struct nouveau_bo *nvbo = gem->driver_private;
 187         struct ttm_buffer_object *bo = &nvbo->bo;
 188         uint32_t domains = valid_domains &
 189                 (write_domains ? write_domains : read_domains);
 190         uint32_t pref_flags = 0, valid_flags = 0;
 191
 192         if (!domains)
 193                 return -EINVAL;
 194
 195         if (valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 196                 valid_flags |= TTM_PL_FLAG_VRAM;
 197
 198         if (valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 199                 valid_flags |= TTM_PL_FLAG_TT;
 200
 201         if ((domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 202             bo->mem.mem_type == TTM_PL_VRAM)
 203                 pref_flags |= TTM_PL_FLAG_VRAM;
 204
 205         else if ((domains & NOUVEAU_GEM_DOMAIN_GART) &&
 206                  bo->mem.mem_type == TTM_PL_TT)
 207                 pref_flags |= TTM_PL_FLAG_TT;
 208
 209         else if (domains & NOUVEAU_GEM_DOMAIN_VRAM)
 210                 pref_flags |= TTM_PL_FLAG_VRAM;
 211
 212         else
 213                 pref_flags |= TTM_PL_FLAG_TT;
 214
 215         nouveau_bo_placement_set(nvbo, pref_flags, valid_flags);
 216
 217         return 0;
 218 }
 219
 220 struct validate_op {
 221         struct list_head vram_list;
 222         struct list_head gart_list;
 223         struct list_head both_list;
 224 };
 225
 226 static void
 227 validate_fini_list(struct list_head *list, struct nouveau_fence *fence)
 228 {
 229         struct list_head *entry, *tmp;
 230         struct nouveau_bo *nvbo;
 231
 232         list_for_each_safe(entry, tmp, list) {
 233                 nvbo = list_entry(entry, struct nouveau_bo, entry);
 234                 if (likely(fence)) {
 235                         struct nouveau_fence *prev_fence;
 236
 237                         spin_lock(&nvbo->bo.bdev->fence_lock);
 238                         prev_fence = nvbo->bo.sync_obj;
 239                         nvbo->bo.sync_obj = nouveau_fence_ref(fence);
 240                         spin_unlock(&nvbo->bo.bdev->fence_lock);
 241                         nouveau_fence_unref(&prev_fence);
 242                 }
 243
 244                 if (unlikely(nvbo->validate_mapped)) {
 245                         ttm_bo_kunmap(&nvbo->kmap);
 246                         nvbo->validate_mapped = false;
 247                 }
 248
 249                 list_del(&nvbo->entry);
 250                 nvbo->reserved_by = NULL;
 251                 ttm_bo_unreserve(&nvbo->bo);
 252                 drm_gem_object_unreference_unlocked(nvbo->gem);
 253         }
 254 }
 255
 256 static void
 257 validate_fini(struct validate_op *op, struct nouveau_fence* fence)
 258 {
 259         validate_fini_list(&op->vram_list, fence);
 260         validate_fini_list(&op->gart_list, fence);
 261         validate_fini_list(&op->both_list, fence);
 262 }
 263
 264 static int
 265 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
 266               struct drm_nouveau_gem_pushbuf_bo *pbbo,
 267               int nr_buffers, struct validate_op *op)
 268 {
 269         struct drm_device *dev = chan->dev;
 270         struct drm_nouveau_private *dev_priv = dev->dev_private;
 271         uint32_t sequence;
 272         int trycnt = 0;
 273         int ret, i;
 274
 275         sequence = atomic_add_return(1, &dev_priv->ttm.validate_sequence);
 276 retry:
 277         if (++trycnt > 100000) {
 278                 NV_ERROR(dev, "%s failed and gave up.\n", __func__);
 279                 return -EINVAL;
 280         }
 281
 282         for (i = 0; i < nr_buffers; i++) {
 283                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
 284                 struct drm_gem_object *gem;
 285                 struct nouveau_bo *nvbo;
 286
 287                 gem = drm_gem_object_lookup(dev, file_priv, b->handle);
 288                 if (!gem) {
 289                         NV_ERROR(dev, "Unknown handle 0x%08x\n", b->handle);
 290                         validate_fini(op, NULL);
 291                         return -ENOENT;
 292                 }
 293                 nvbo = gem->driver_private;
 294
 295                 if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
 296                         NV_ERROR(dev, "multiple instances of buffer %d on "
 297                                       "validation list\n", b->handle);
 298                         validate_fini(op, NULL);
 299                         return -EINVAL;
 300                 }
 301
 302                 ret = ttm_bo_reserve(&nvbo->bo, true, false, true, sequence);
 303                 if (ret) {
 304                         validate_fini(op, NULL);
 305                         if (unlikely(ret == -EAGAIN))
 306                                 ret = ttm_bo_wait_unreserved(&nvbo->bo, true);
 307                         drm_gem_object_unreference_unlocked(gem);
 308                         if (unlikely(ret)) {
 309                                 if (ret != -ERESTARTSYS)
 310                                         NV_ERROR(dev, "fail reserve\n");
 311                                 return ret;
 312                         }
 313                         goto retry;
 314                 }
 315
 316                 b->user_priv = (uint64_t)(unsigned long)nvbo;
 317                 nvbo->reserved_by = file_priv;
 318                 nvbo->pbbo_index = i;
 319                 if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 320                     (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
 321                         list_add_tail(&nvbo->entry, &op->both_list);
 322                 else
 323                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 324                         list_add_tail(&nvbo->entry, &op->vram_list);
 325                 else
 326                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 327                         list_add_tail(&nvbo->entry, &op->gart_list);
 328                 else {
 329                         NV_ERROR(dev, "invalid valid domains: 0x%08x\n",
 330                                  b->valid_domains);
 331                         list_add_tail(&nvbo->entry, &op->both_list);
 332                         validate_fini(op, NULL);
 333                         return -EINVAL;
 334                 }
 335         }
 336
 337         return 0;
 338 }
 339
 340 static int
 341 validate_list(struct nouveau_channel *chan, struct list_head *list,
 342               struct drm_nouveau_gem_pushbuf_bo *pbbo, uint64_t user_pbbo_ptr)
 343 {
 344         struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
 345                                 (void __force __user *)(uintptr_t)user_pbbo_ptr;
 346         struct drm_device *dev = chan->dev;
 347         struct nouveau_bo *nvbo;
 348         int ret, relocs = 0;
 349
 350         list_for_each_entry(nvbo, list, entry) {
 351                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
 352
 353                 ret = nouveau_fence_sync(nvbo->bo.sync_obj, chan);
 354                 if (unlikely(ret)) {
 355                         NV_ERROR(dev, "fail pre-validate sync\n");
 356                         return ret;
 357                 }
 358
 359                 ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
 360                                              b->write_domains,
 361                                              b->valid_domains);
 362                 if (unlikely(ret)) {
 363                         NV_ERROR(dev, "fail set_domain\n");
 364                         return ret;
 365                 }
 366
 367                 nvbo->channel = (b->read_domains & (1 << 31)) ? NULL : chan;
 368                 ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 369                                       true, false, false);
 370                 nvbo->channel = NULL;
 371                 if (unlikely(ret)) {
 372                         if (ret != -ERESTARTSYS)
 373                                 NV_ERROR(dev, "fail ttm_validate\n");
 374                         return ret;
 375                 }
 376
 377                 ret = nouveau_fence_sync(nvbo->bo.sync_obj, chan);
 378                 if (unlikely(ret)) {
 379                         NV_ERROR(dev, "fail post-validate sync\n");
 380                         return ret;
 381                 }
 382
 383                 if (nvbo->bo.offset == b->presumed.offset &&
 384                     ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
 385                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
 386                      (nvbo->bo.mem.mem_type == TTM_PL_TT &&
 387                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
 388                         continue;
 389
 390                 if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 391                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
 392                 else
 393                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
 394                 b->presumed.offset = nvbo->bo.offset;
 395                 b->presumed.valid = 0;
 396                 relocs++;
 397
 398                 if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index].presumed,
 399                                      &b->presumed, sizeof(b->presumed)))
 400                         return -EFAULT;
 401         }
 402
 403         return relocs;
 404 }
 405
 406 static int
 407 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 408                              struct drm_file *file_priv,
 409                              struct drm_nouveau_gem_pushbuf_bo *pbbo,
 410                              uint64_t user_buffers, int nr_buffers,
 411                              struct validate_op *op, int *apply_relocs)
 412 {
 413         struct drm_device *dev = chan->dev;
 414         int ret, relocs = 0;
 415
 416         INIT_LIST_HEAD(&op->vram_list);
 417         INIT_LIST_HEAD(&op->gart_list);
 418         INIT_LIST_HEAD(&op->both_list);
 419
 420         if (nr_buffers == 0)
 421                 return 0;
 422
 423         ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
 424         if (unlikely(ret)) {
 425                 if (ret != -ERESTARTSYS)
 426                         NV_ERROR(dev, "validate_init\n");
 427                 return ret;
 428         }
 429
 430         ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
 431         if (unlikely(ret < 0)) {
 432                 if (ret != -ERESTARTSYS)
 433                         NV_ERROR(dev, "validate vram_list\n");
 434                 validate_fini(op, NULL);
 435                 return ret;
 436         }
 437         relocs += ret;
 438
 439         ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
 440         if (unlikely(ret < 0)) {
 441                 if (ret != -ERESTARTSYS)
 442                         NV_ERROR(dev, "validate gart_list\n");
 443                 validate_fini(op, NULL);
 444                 return ret;
 445         }
 446         relocs += ret;
 447
 448         ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
 449         if (unlikely(ret < 0)) {
 450                 if (ret != -ERESTARTSYS)
 451                         NV_ERROR(dev, "validate both_list\n");
 452                 validate_fini(op, NULL);
 453                 return ret;
 454         }
 455         relocs += ret;
 456
 457         *apply_relocs = relocs;
 458         return 0;
 459 }
 460
 461 static inline void *
 462 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
 463 {
 464         void *mem;
 465         void __user *userptr = (void __force __user *)(uintptr_t)user;
 466
 467         mem = kmalloc(nmemb * size, GFP_KERNEL);
 468         if (!mem)
 469                 return ERR_PTR(-ENOMEM);
 470
 471         if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
 472                 kfree(mem);
 473                 return ERR_PTR(-EFAULT);
 474         }
 475
 476         return mem;
 477 }
 478
 479 static int
 480 nouveau_gem_pushbuf_reloc_apply(struct drm_device *dev,
 481                                 struct drm_nouveau_gem_pushbuf *req,
 482                                 struct drm_nouveau_gem_pushbuf_bo *bo)
 483 {
 484         struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
 485         int ret = 0;
 486         unsigned i;
 487
 488         reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
 489         if (IS_ERR(reloc))
 490                 return PTR_ERR(reloc);
 491
 492         for (i = 0; i < req->nr_relocs; i++) {
 493                 struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
 494                 struct drm_nouveau_gem_pushbuf_bo *b;
 495                 struct nouveau_bo *nvbo;
 496                 uint32_t data;
 497
 498                 if (unlikely(r->bo_index > req->nr_buffers)) {
 499                         NV_ERROR(dev, "reloc bo index invalid\n");
 500                         ret = -EINVAL;
 501                         break;
 502                 }
 503
 504                 b = &bo[r->bo_index];
 505                 if (b->presumed.valid)
 506                         continue;
 507
 508                 if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
 509                         NV_ERROR(dev, "reloc container bo index invalid\n");
 510                         ret = -EINVAL;
 511                         break;
 512                 }
 513                 nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
 514
 515                 if (unlikely(r->reloc_bo_offset + 4 >
 516                              nvbo->bo.mem.num_pages << PAGE_SHIFT)) {
 517                         NV_ERROR(dev, "reloc outside of bo\n");
 518                         ret = -EINVAL;
 519                         break;
 520                 }
 521
 522                 if (!nvbo->kmap.virtual) {
 523                         ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages,
 524                                           &nvbo->kmap);
 525                         if (ret) {
 526                                 NV_ERROR(dev, "failed kmap for reloc\n");
 527                                 break;
 528                         }
 529                         nvbo->validate_mapped = true;
 530                 }
 531
 532                 if (r->flags & NOUVEAU_GEM_RELOC_LOW)
 533                         data = b->presumed.offset + r->data;
 534                 else
 535                 if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
 536                         data = (b->presumed.offset + r->data) >> 32;
 537                 else
 538                         data = r->data;
 539
 540                 if (r->flags & NOUVEAU_GEM_RELOC_OR) {
 541                         if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
 542                                 data |= r->tor;
 543                         else
 544                                 data |= r->vor;
 545                 }
 546
 547                 spin_lock(&nvbo->bo.bdev->fence_lock);
 548                 ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 549                 spin_unlock(&nvbo->bo.bdev->fence_lock);
 550                 if (ret) {
 551                         NV_ERROR(dev, "reloc wait_idle failed: %d\n", ret);
 552                         break;
 553                 }
 554
 555                 nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
 556         }
 557
 558         kfree(reloc);
 559         return ret;
 560 }
 561
 562 int
 563 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 564                           struct drm_file *file_priv)
 565 {
 566         struct drm_nouveau_private *dev_priv = dev->dev_private;
 567         struct drm_nouveau_gem_pushbuf *req = data;
 568         struct drm_nouveau_gem_pushbuf_push *push;
 569         struct drm_nouveau_gem_pushbuf_bo *bo;
 570         struct nouveau_channel *chan;
 571         struct validate_op op;
 572         struct nouveau_fence *fence = NULL;
 573         int i, j, ret = 0, do_reloc = 0;
 574
 575         chan = nouveau_channel_get(dev, file_priv, req->channel);
 576         if (IS_ERR(chan))
 577                 return PTR_ERR(chan);
 578
 579         req->vram_available = dev_priv->fb_aper_free;
 580         req->gart_available = dev_priv->gart_info.aper_free;
 581         if (unlikely(req->nr_push == 0))
 582                 goto out_next;
 583
 584         if (unlikely(req->nr_push > NOUVEAU_GEM_MAX_PUSH)) {
 585                 NV_ERROR(dev, "pushbuf push count exceeds limit: %d max %d\n",
 586                          req->nr_push, NOUVEAU_GEM_MAX_PUSH);
 587                 nouveau_channel_put(&chan);
 588                 return -EINVAL;
 589         }
 590
 591         if (unlikely(req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS)) {
 592                 NV_ERROR(dev, "pushbuf bo count exceeds limit: %d max %d\n",
 593                          req->nr_buffers, NOUVEAU_GEM_MAX_BUFFERS);
 594                 nouveau_channel_put(&chan);
 595                 return -EINVAL;
 596         }
 597
 598         if (unlikely(req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS)) {
 599                 NV_ERROR(dev, "pushbuf reloc count exceeds limit: %d max %d\n",
 600                          req->nr_relocs, NOUVEAU_GEM_MAX_RELOCS);
 601                 nouveau_channel_put(&chan);
 602                 return -EINVAL;
 603         }
 604
 605         push = u_memcpya(req->push, req->nr_push, sizeof(*push));
 606         if (IS_ERR(push)) {
 607                 nouveau_channel_put(&chan);
 608                 return PTR_ERR(push);
 609         }
 610
 611         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 612         if (IS_ERR(bo)) {
 613                 kfree(push);
 614                 nouveau_channel_put(&chan);
 615                 return PTR_ERR(bo);
 616         }
 617
 618         /* Mark push buffers as being used on PFIFO, the validation code
 619          * will then make sure that if the pushbuf bo moves, that they
 620          * happen on the kernel channel, which will in turn cause a sync
 621          * to happen before we try and submit the push buffer.
 622          */
 623         for (i = 0; i < req->nr_push; i++) {
 624                 if (push[i].bo_index >= req->nr_buffers) {
 625                         NV_ERROR(dev, "push %d buffer not in list\n", i);
 626                         ret = -EINVAL;
 627                         goto out;
 628                 }
 629
 630                 bo[push[i].bo_index].read_domains |= (1 << 31);
 631         }
 632
 633         /* Validate buffer list */
 634         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 635                                            req->nr_buffers, &op, &do_reloc);
 636         if (ret) {
 637                 if (ret != -ERESTARTSYS)
 638                         NV_ERROR(dev, "validate: %d\n", ret);
 639                 goto out;
 640         }
 641
 642         /* Apply any relocations that are required */
 643         if (do_reloc) {
 644                 ret = nouveau_gem_pushbuf_reloc_apply(dev, req, bo);
 645                 if (ret) {
 646                         NV_ERROR(dev, "reloc apply: %d\n", ret);
 647                         goto out;
 648                 }
 649         }
 650
 651         if (chan->dma.ib_max) {
 652                 ret = nouveau_dma_wait(chan, req->nr_push + 1, 6);
 653                 if (ret) {
 654                         NV_INFO(dev, "nv50cal_space: %d\n", ret);
 655                         goto out;
 656                 }
 657
 658                 for (i = 0; i < req->nr_push; i++) {
 659                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 660                                 bo[push[i].bo_index].user_priv;
 661
 662                         nv50_dma_push(chan, nvbo, push[i].offset,
 663                                       push[i].length);
 664                 }
 665         } else
 666         if (dev_priv->chipset >= 0x25) {
 667                 ret = RING_SPACE(chan, req->nr_push * 2);
 668                 if (ret) {
 669                         NV_ERROR(dev, "cal_space: %d\n", ret);
 670                         goto out;
 671                 }
 672
 673                 for (i = 0; i < req->nr_push; i++) {
 674                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 675                                 bo[push[i].bo_index].user_priv;
 676                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 677
 678                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 679                                         push[i].offset) | 2);
 680                         OUT_RING(chan, 0);
 681                 }
 682         } else {
 683                 ret = RING_SPACE(chan, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
 684                 if (ret) {
 685                         NV_ERROR(dev, "jmp_space: %d\n", ret);
 686                         goto out;
 687                 }
 688
 689                 for (i = 0; i < req->nr_push; i++) {
 690                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 691                                 bo[push[i].bo_index].user_priv;
 692                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 693                         uint32_t cmd;
 694
 695                         cmd = chan->pushbuf_base + ((chan->dma.cur + 2) << 2);
 696                         cmd |= 0x20000000;
 697                         if (unlikely(cmd != req->suffix0)) {
 698                                 if (!nvbo->kmap.virtual) {
 699                                         ret = ttm_bo_kmap(&nvbo->bo, 0,
 700                                                           nvbo->bo.mem.
 701                                                           num_pages,
 702                                                           &nvbo->kmap);
 703                                         if (ret) {
 704                                                 WIND_RING(chan);
 705                                                 goto out;
 706                                         }
 707                                         nvbo->validate_mapped = true;
 708                                 }
 709
 710                                 nouveau_bo_wr32(nvbo, (push[i].offset +
 711                                                 push[i].length - 8) / 4, cmd);
 712                         }
 713
 714                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 715                                         push[i].offset) | 0x20000000);
 716                         OUT_RING(chan, 0);
 717                         for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
 718                                 OUT_RING(chan, 0);
 719                 }
 720         }
 721
 722         ret = nouveau_fence_new(chan, &fence, true);
 723         if (ret) {
 724                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 725                 WIND_RING(chan);
 726                 goto out;
 727         }
 728
 729 out:
 730         validate_fini(&op, fence);
 731         nouveau_fence_unref(&fence);
 732         kfree(bo);
 733         kfree(push);
 734
 735 out_next:
 736         if (chan->dma.ib_max) {
 737                 req->suffix0 = 0x00000000;
 738                 req->suffix1 = 0x00000000;
 739         } else
 740         if (dev_priv->chipset >= 0x25) {
 741                 req->suffix0 = 0x00020000;
 742                 req->suffix1 = 0x00000000;
 743         } else {
 744                 req->suffix0 = 0x20000000 |
 745                               (chan->pushbuf_base + ((chan->dma.cur + 2) << 2));
 746                 req->suffix1 = 0x00000000;
 747         }
 748
 749         nouveau_channel_put(&chan);
 750         return ret;
 751 }
 752
 753 static inline uint32_t
 754 domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
 755 {
 756         uint32_t flags = 0;
 757
 758         if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
 759                 flags |= TTM_PL_FLAG_VRAM;
 760         if (domain & NOUVEAU_GEM_DOMAIN_GART)
 761                 flags |= TTM_PL_FLAG_TT;
 762
 763         return flags;
 764 }
 765
 766 int
 767 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 768                            struct drm_file *file_priv)
 769 {
 770         struct drm_nouveau_gem_cpu_prep *req = data;
 771         struct drm_gem_object *gem;
 772         struct nouveau_bo *nvbo;
 773         bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
 774         int ret = -EINVAL;
 775
 776         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 777         if (!gem)
 778                 return -ENOENT;
 779         nvbo = nouveau_gem_object(gem);
 780
 781         spin_lock(&nvbo->bo.bdev->fence_lock);
 782         ret = ttm_bo_wait(&nvbo->bo, true, true, no_wait);
 783         spin_unlock(&nvbo->bo.bdev->fence_lock);
 784         drm_gem_object_unreference_unlocked(gem);
 785         return ret;
 786 }
 787
 788 int
 789 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 790                            struct drm_file *file_priv)
 791 {
 792         return 0;
 793 }
 794
 795 int
 796 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 797                        struct drm_file *file_priv)
 798 {
 799         struct drm_nouveau_gem_info *req = data;
 800         struct drm_gem_object *gem;
 801         int ret;
 802
 803         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 804         if (!gem)
 805                 return -ENOENT;
 806
 807         ret = nouveau_gem_info(gem, req);
 808         drm_gem_object_unreference_unlocked(gem);
 809         return ret;
 810 }
 811