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
  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         switch (tile_flags) {
 109         case 0x0000:
 110         case 0x1800:
 111         case 0x2800:
 112         case 0x4800:
 113         case 0x7000:
 114         case 0x7400:
 115         case 0x7a00:
 116         case 0xe000:
 117                 break;
 118         default:
 119                 NV_ERROR(dev, "bad page flags: 0x%08x\n", tile_flags);
 120                 return false;
 121         }
 122
 123         return true;
 124 }
 125
 126 int
 127 nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
 128                       struct drm_file *file_priv)
 129 {
 130         struct drm_nouveau_private *dev_priv = dev->dev_private;
 131         struct drm_nouveau_gem_new *req = data;
 132         struct nouveau_bo *nvbo = NULL;
 133         struct nouveau_channel *chan = NULL;
 134         uint32_t flags = 0;
 135         int ret = 0;
 136
 137         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 138
 139         if (unlikely(dev_priv->ttm.bdev.dev_mapping == NULL))
 140                 dev_priv->ttm.bdev.dev_mapping = dev_priv->dev->dev_mapping;
 141
 142         if (req->channel_hint) {
 143                 NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel_hint,
 144                                                      file_priv, chan);
 145         }
 146
 147         if (req->info.domain & NOUVEAU_GEM_DOMAIN_VRAM)
 148                 flags |= TTM_PL_FLAG_VRAM;
 149         if (req->info.domain & NOUVEAU_GEM_DOMAIN_GART)
 150                 flags |= TTM_PL_FLAG_TT;
 151         if (!flags || req->info.domain & NOUVEAU_GEM_DOMAIN_CPU)
 152                 flags |= TTM_PL_FLAG_SYSTEM;
 153
 154         if (!nouveau_gem_tile_flags_valid(dev, req->info.tile_flags))
 155                 return -EINVAL;
 156
 157         ret = nouveau_gem_new(dev, chan, req->info.size, req->align, flags,
 158                               req->info.tile_mode, req->info.tile_flags, false,
 159                               (req->info.domain & NOUVEAU_GEM_DOMAIN_MAPPABLE),
 160                               &nvbo);
 161         if (ret)
 162                 return ret;
 163
 164         ret = nouveau_gem_info(nvbo->gem, &req->info);
 165         if (ret)
 166                 goto out;
 167
 168         ret = drm_gem_handle_create(file_priv, nvbo->gem, &req->info.handle);
 169 out:
 170         drm_gem_object_handle_unreference_unlocked(nvbo->gem);
 171
 172         if (ret)
 173                 drm_gem_object_unreference_unlocked(nvbo->gem);
 174         return ret;
 175 }
 176
 177 static int
 178 nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains,
 179                        uint32_t write_domains, uint32_t valid_domains)
 180 {
 181         struct nouveau_bo *nvbo = gem->driver_private;
 182         struct ttm_buffer_object *bo = &nvbo->bo;
 183         uint32_t domains = valid_domains &
 184                 (write_domains ? write_domains : read_domains);
 185         uint32_t pref_flags = 0, valid_flags = 0;
 186
 187         if (!domains)
 188                 return -EINVAL;
 189
 190         if (valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 191                 valid_flags |= TTM_PL_FLAG_VRAM;
 192
 193         if (valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 194                 valid_flags |= TTM_PL_FLAG_TT;
 195
 196         if ((domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 197             bo->mem.mem_type == TTM_PL_VRAM)
 198                 pref_flags |= TTM_PL_FLAG_VRAM;
 199
 200         else if ((domains & NOUVEAU_GEM_DOMAIN_GART) &&
 201                  bo->mem.mem_type == TTM_PL_TT)
 202                 pref_flags |= TTM_PL_FLAG_TT;
 203
 204         else if (domains & NOUVEAU_GEM_DOMAIN_VRAM)
 205                 pref_flags |= TTM_PL_FLAG_VRAM;
 206
 207         else
 208                 pref_flags |= TTM_PL_FLAG_TT;
 209
 210         nouveau_bo_placement_set(nvbo, pref_flags, valid_flags);
 211
 212         return 0;
 213 }
 214
 215 struct validate_op {
 216         struct list_head vram_list;
 217         struct list_head gart_list;
 218         struct list_head both_list;
 219 };
 220
 221 static void
 222 validate_fini_list(struct list_head *list, struct nouveau_fence *fence)
 223 {
 224         struct list_head *entry, *tmp;
 225         struct nouveau_bo *nvbo;
 226
 227         list_for_each_safe(entry, tmp, list) {
 228                 nvbo = list_entry(entry, struct nouveau_bo, entry);
 229                 if (likely(fence)) {
 230                         struct nouveau_fence *prev_fence;
 231
 232                         spin_lock(&nvbo->bo.lock);
 233                         prev_fence = nvbo->bo.sync_obj;
 234                         nvbo->bo.sync_obj = nouveau_fence_ref(fence);
 235                         spin_unlock(&nvbo->bo.lock);
 236                         nouveau_fence_unref((void *)&prev_fence);
 237                 }
 238
 239                 if (unlikely(nvbo->validate_mapped)) {
 240                         ttm_bo_kunmap(&nvbo->kmap);
 241                         nvbo->validate_mapped = false;
 242                 }
 243
 244                 list_del(&nvbo->entry);
 245                 nvbo->reserved_by = NULL;
 246                 ttm_bo_unreserve(&nvbo->bo);
 247                 drm_gem_object_unreference(nvbo->gem);
 248         }
 249 }
 250
 251 static void
 252 validate_fini(struct validate_op *op, struct nouveau_fence* fence)
 253 {
 254         validate_fini_list(&op->vram_list, fence);
 255         validate_fini_list(&op->gart_list, fence);
 256         validate_fini_list(&op->both_list, fence);
 257 }
 258
 259 static int
 260 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
 261               struct drm_nouveau_gem_pushbuf_bo *pbbo,
 262               int nr_buffers, struct validate_op *op)
 263 {
 264         struct drm_device *dev = chan->dev;
 265         struct drm_nouveau_private *dev_priv = dev->dev_private;
 266         uint32_t sequence;
 267         int trycnt = 0;
 268         int ret, i;
 269
 270         sequence = atomic_add_return(1, &dev_priv->ttm.validate_sequence);
 271 retry:
 272         if (++trycnt > 100000) {
 273                 NV_ERROR(dev, "%s failed and gave up.\n", __func__);
 274                 return -EINVAL;
 275         }
 276
 277         for (i = 0; i < nr_buffers; i++) {
 278                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
 279                 struct drm_gem_object *gem;
 280                 struct nouveau_bo *nvbo;
 281
 282                 gem = drm_gem_object_lookup(dev, file_priv, b->handle);
 283                 if (!gem) {
 284                         NV_ERROR(dev, "Unknown handle 0x%08x\n", b->handle);
 285                         validate_fini(op, NULL);
 286                         return -EINVAL;
 287                 }
 288                 nvbo = gem->driver_private;
 289
 290                 if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
 291                         NV_ERROR(dev, "multiple instances of buffer %d on "
 292                                       "validation list\n", b->handle);
 293                         validate_fini(op, NULL);
 294                         return -EINVAL;
 295                 }
 296
 297                 ret = ttm_bo_reserve(&nvbo->bo, false, false, true, sequence);
 298                 if (ret) {
 299                         validate_fini(op, NULL);
 300                         if (ret == -EAGAIN)
 301                                 ret = ttm_bo_wait_unreserved(&nvbo->bo, false);
 302                         drm_gem_object_unreference(gem);
 303                         if (ret) {
 304                                 NV_ERROR(dev, "fail reserve\n");
 305                                 return ret;
 306                         }
 307                         goto retry;
 308                 }
 309
 310                 b->user_priv = (uint64_t)(unsigned long)nvbo;
 311                 nvbo->reserved_by = file_priv;
 312                 nvbo->pbbo_index = i;
 313                 if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 314                     (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
 315                         list_add_tail(&nvbo->entry, &op->both_list);
 316                 else
 317                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 318                         list_add_tail(&nvbo->entry, &op->vram_list);
 319                 else
 320                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 321                         list_add_tail(&nvbo->entry, &op->gart_list);
 322                 else {
 323                         NV_ERROR(dev, "invalid valid domains: 0x%08x\n",
 324                                  b->valid_domains);
 325                         list_add_tail(&nvbo->entry, &op->both_list);
 326                         validate_fini(op, NULL);
 327                         return -EINVAL;
 328                 }
 329
 330                 if (unlikely(atomic_read(&nvbo->bo.cpu_writers) > 0)) {
 331                         validate_fini(op, NULL);
 332
 333                         if (nvbo->cpu_filp == file_priv) {
 334                                 NV_ERROR(dev, "bo %p mapped by process trying "
 335                                               "to validate it!\n", nvbo);
 336                                 return -EINVAL;
 337                         }
 338
 339                         ret = ttm_bo_wait_cpu(&nvbo->bo, false);
 340                         if (ret) {
 341                                 NV_ERROR(dev, "fail wait_cpu\n");
 342                                 return ret;
 343                         }
 344                         goto retry;
 345                 }
 346         }
 347
 348         return 0;
 349 }
 350
 351 static int
 352 validate_list(struct nouveau_channel *chan, struct list_head *list,
 353               struct drm_nouveau_gem_pushbuf_bo *pbbo, uint64_t user_pbbo_ptr)
 354 {
 355         struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
 356                                 (void __force __user *)(uintptr_t)user_pbbo_ptr;
 357         struct drm_device *dev = chan->dev;
 358         struct nouveau_bo *nvbo;
 359         int ret, relocs = 0;
 360
 361         list_for_each_entry(nvbo, list, entry) {
 362                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
 363                 struct nouveau_fence *prev_fence = nvbo->bo.sync_obj;
 364
 365                 if (prev_fence && nouveau_fence_channel(prev_fence) != chan) {
 366                         spin_lock(&nvbo->bo.lock);
 367                         ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 368                         spin_unlock(&nvbo->bo.lock);
 369                         if (unlikely(ret)) {
 370                                 NV_ERROR(dev, "fail wait other chan\n");
 371                                 return ret;
 372                         }
 373                 }
 374
 375                 ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
 376                                              b->write_domains,
 377                                              b->valid_domains);
 378                 if (unlikely(ret)) {
 379                         NV_ERROR(dev, "fail set_domain\n");
 380                         return ret;
 381                 }
 382
 383                 nvbo->channel = chan;
 384                 ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 385                                       false, false);
 386                 nvbo->channel = NULL;
 387                 if (unlikely(ret)) {
 388                         NV_ERROR(dev, "fail ttm_validate\n");
 389                         return ret;
 390                 }
 391
 392                 if (nvbo->bo.offset == b->presumed.offset &&
 393                     ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
 394                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
 395                      (nvbo->bo.mem.mem_type == TTM_PL_TT &&
 396                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
 397                         continue;
 398
 399                 if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 400                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
 401                 else
 402                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
 403                 b->presumed.offset = nvbo->bo.offset;
 404                 b->presumed.valid = 0;
 405                 relocs++;
 406
 407                 if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index].presumed,
 408                                      &b->presumed, sizeof(b->presumed)))
 409                         return -EFAULT;
 410         }
 411
 412         return relocs;
 413 }
 414
 415 static int
 416 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 417                              struct drm_file *file_priv,
 418                              struct drm_nouveau_gem_pushbuf_bo *pbbo,
 419                              uint64_t user_buffers, int nr_buffers,
 420                              struct validate_op *op, int *apply_relocs)
 421 {
 422         struct drm_device *dev = chan->dev;
 423         int ret, relocs = 0;
 424
 425         INIT_LIST_HEAD(&op->vram_list);
 426         INIT_LIST_HEAD(&op->gart_list);
 427         INIT_LIST_HEAD(&op->both_list);
 428
 429         if (nr_buffers == 0)
 430                 return 0;
 431
 432         ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
 433         if (unlikely(ret)) {
 434                 NV_ERROR(dev, "validate_init\n");
 435                 return ret;
 436         }
 437
 438         ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
 439         if (unlikely(ret < 0)) {
 440                 NV_ERROR(dev, "validate vram_list\n");
 441                 validate_fini(op, NULL);
 442                 return ret;
 443         }
 444         relocs += ret;
 445
 446         ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
 447         if (unlikely(ret < 0)) {
 448                 NV_ERROR(dev, "validate gart_list\n");
 449                 validate_fini(op, NULL);
 450                 return ret;
 451         }
 452         relocs += ret;
 453
 454         ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
 455         if (unlikely(ret < 0)) {
 456                 NV_ERROR(dev, "validate both_list\n");
 457                 validate_fini(op, NULL);
 458                 return ret;
 459         }
 460         relocs += ret;
 461
 462         *apply_relocs = relocs;
 463         return 0;
 464 }
 465
 466 static inline void *
 467 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
 468 {
 469         void *mem;
 470         void __user *userptr = (void __force __user *)(uintptr_t)user;
 471
 472         mem = kmalloc(nmemb * size, GFP_KERNEL);
 473         if (!mem)
 474                 return ERR_PTR(-ENOMEM);
 475
 476         if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
 477                 kfree(mem);
 478                 return ERR_PTR(-EFAULT);
 479         }
 480
 481         return mem;
 482 }
 483
 484 static int
 485 nouveau_gem_pushbuf_reloc_apply(struct drm_device *dev,
 486                                 struct drm_nouveau_gem_pushbuf *req,
 487                                 struct drm_nouveau_gem_pushbuf_bo *bo)
 488 {
 489         struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
 490         int ret = 0;
 491         unsigned i;
 492
 493         reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
 494         if (IS_ERR(reloc))
 495                 return PTR_ERR(reloc);
 496
 497         for (i = 0; i < req->nr_relocs; i++) {
 498                 struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
 499                 struct drm_nouveau_gem_pushbuf_bo *b;
 500                 struct nouveau_bo *nvbo;
 501                 uint32_t data;
 502
 503                 if (unlikely(r->bo_index > req->nr_buffers)) {
 504                         NV_ERROR(dev, "reloc bo index invalid\n");
 505                         ret = -EINVAL;
 506                         break;
 507                 }
 508
 509                 b = &bo[r->bo_index];
 510                 if (b->presumed.valid)
 511                         continue;
 512
 513                 if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
 514                         NV_ERROR(dev, "reloc container bo index invalid\n");
 515                         ret = -EINVAL;
 516                         break;
 517                 }
 518                 nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
 519
 520                 if (unlikely(r->reloc_bo_offset + 4 >
 521                              nvbo->bo.mem.num_pages << PAGE_SHIFT)) {
 522                         NV_ERROR(dev, "reloc outside of bo\n");
 523                         ret = -EINVAL;
 524                         break;
 525                 }
 526
 527                 if (!nvbo->kmap.virtual) {
 528                         ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages,
 529                                           &nvbo->kmap);
 530                         if (ret) {
 531                                 NV_ERROR(dev, "failed kmap for reloc\n");
 532                                 break;
 533                         }
 534                         nvbo->validate_mapped = true;
 535                 }
 536
 537                 if (r->flags & NOUVEAU_GEM_RELOC_LOW)
 538                         data = b->presumed.offset + r->data;
 539                 else
 540                 if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
 541                         data = (b->presumed.offset + r->data) >> 32;
 542                 else
 543                         data = r->data;
 544
 545                 if (r->flags & NOUVEAU_GEM_RELOC_OR) {
 546                         if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
 547                                 data |= r->tor;
 548                         else
 549                                 data |= r->vor;
 550                 }
 551
 552                 spin_lock(&nvbo->bo.lock);
 553                 ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 554                 spin_unlock(&nvbo->bo.lock);
 555                 if (ret) {
 556                         NV_ERROR(dev, "reloc wait_idle failed: %d\n", ret);
 557                         break;
 558                 }
 559
 560                 nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
 561         }
 562
 563         kfree(reloc);
 564         return ret;
 565 }
 566
 567 int
 568 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 569                           struct drm_file *file_priv)
 570 {
 571         struct drm_nouveau_private *dev_priv = dev->dev_private;
 572         struct drm_nouveau_gem_pushbuf *req = data;
 573         struct drm_nouveau_gem_pushbuf_push *push;
 574         struct drm_nouveau_gem_pushbuf_bo *bo;
 575         struct nouveau_channel *chan;
 576         struct validate_op op;
 577         struct nouveau_fence *fence = 0;
 578         int i, j, ret = 0, do_reloc = 0;
 579
 580         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 581         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
 582
 583         req->vram_available = dev_priv->fb_aper_free;
 584         req->gart_available = dev_priv->gart_info.aper_free;
 585         if (unlikely(req->nr_push == 0))
 586                 goto out_next;
 587
 588         if (unlikely(req->nr_push > NOUVEAU_GEM_MAX_PUSH)) {
 589                 NV_ERROR(dev, "pushbuf push count exceeds limit: %d max %d\n",
 590                          req->nr_push, NOUVEAU_GEM_MAX_PUSH);
 591                 return -EINVAL;
 592         }
 593
 594         if (unlikely(req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS)) {
 595                 NV_ERROR(dev, "pushbuf bo count exceeds limit: %d max %d\n",
 596                          req->nr_buffers, NOUVEAU_GEM_MAX_BUFFERS);
 597                 return -EINVAL;
 598         }
 599
 600         if (unlikely(req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS)) {
 601                 NV_ERROR(dev, "pushbuf reloc count exceeds limit: %d max %d\n",
 602                          req->nr_relocs, NOUVEAU_GEM_MAX_RELOCS);
 603                 return -EINVAL;
 604         }
 605
 606         push = u_memcpya(req->push, req->nr_push, sizeof(*push));
 607         if (IS_ERR(push))
 608                 return PTR_ERR(push);
 609
 610         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 611         if (IS_ERR(bo)) {
 612                 kfree(push);
 613                 return PTR_ERR(bo);
 614         }
 615
 616         mutex_lock(&dev->struct_mutex);
 617
 618         /* Validate buffer list */
 619         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 620                                            req->nr_buffers, &op, &do_reloc);
 621         if (ret) {
 622                 NV_ERROR(dev, "validate: %d\n", ret);
 623                 goto out;
 624         }
 625
 626         /* Apply any relocations that are required */
 627         if (do_reloc) {
 628                 ret = nouveau_gem_pushbuf_reloc_apply(dev, req, bo);
 629                 if (ret) {
 630                         NV_ERROR(dev, "reloc apply: %d\n", ret);
 631                         goto out;
 632                 }
 633         }
 634
 635         if (chan->dma.ib_max) {
 636                 ret = nouveau_dma_wait(chan, req->nr_push + 1, 6);
 637                 if (ret) {
 638                         NV_INFO(dev, "nv50cal_space: %d\n", ret);
 639                         goto out;
 640                 }
 641
 642                 for (i = 0; i < req->nr_push; i++) {
 643                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 644                                 bo[push[i].bo_index].user_priv;
 645
 646                         nv50_dma_push(chan, nvbo, push[i].offset,
 647                                       push[i].length);
 648                 }
 649         } else
 650         if (dev_priv->card_type >= NV_20) {
 651                 ret = RING_SPACE(chan, req->nr_push * 2);
 652                 if (ret) {
 653                         NV_ERROR(dev, "cal_space: %d\n", ret);
 654                         goto out;
 655                 }
 656
 657                 for (i = 0; i < req->nr_push; i++) {
 658                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 659                                 bo[push[i].bo_index].user_priv;
 660                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 661
 662                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 663                                         push[i].offset) | 2);
 664                         OUT_RING(chan, 0);
 665                 }
 666         } else {
 667                 ret = RING_SPACE(chan, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
 668                 if (ret) {
 669                         NV_ERROR(dev, "jmp_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                         uint32_t cmd;
 678
 679                         cmd = chan->pushbuf_base + ((chan->dma.cur + 2) << 2);
 680                         cmd |= 0x20000000;
 681                         if (unlikely(cmd != req->suffix0)) {
 682                                 if (!nvbo->kmap.virtual) {
 683                                         ret = ttm_bo_kmap(&nvbo->bo, 0,
 684                                                           nvbo->bo.mem.
 685                                                           num_pages,
 686                                                           &nvbo->kmap);
 687                                         if (ret) {
 688                                                 WIND_RING(chan);
 689                                                 goto out;
 690                                         }
 691                                         nvbo->validate_mapped = true;
 692                                 }
 693
 694                                 nouveau_bo_wr32(nvbo, (push[i].offset +
 695                                                 push[i].length - 8) / 4, cmd);
 696                         }
 697
 698                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 699                                         push[i].offset) | 0x20000000);
 700                         OUT_RING(chan, 0);
 701                         for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
 702                                 OUT_RING(chan, 0);
 703                 }
 704         }
 705
 706         ret = nouveau_fence_new(chan, &fence, true);
 707         if (ret) {
 708                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 709                 WIND_RING(chan);
 710                 goto out;
 711         }
 712
 713 out:
 714         validate_fini(&op, fence);
 715         nouveau_fence_unref((void**)&fence);
 716         mutex_unlock(&dev->struct_mutex);
 717         kfree(bo);
 718         kfree(push);
 719
 720 out_next:
 721         if (chan->dma.ib_max) {
 722                 req->suffix0 = 0x00000000;
 723                 req->suffix1 = 0x00000000;
 724         } else
 725         if (dev_priv->card_type >= NV_20) {
 726                 req->suffix0 = 0x00020000;
 727                 req->suffix1 = 0x00000000;
 728         } else {
 729                 req->suffix0 = 0x20000000 |
 730                               (chan->pushbuf_base + ((chan->dma.cur + 2) << 2));
 731                 req->suffix1 = 0x00000000;
 732         }
 733
 734         return ret;
 735 }
 736
 737 static inline uint32_t
 738 domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
 739 {
 740         uint32_t flags = 0;
 741
 742         if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
 743                 flags |= TTM_PL_FLAG_VRAM;
 744         if (domain & NOUVEAU_GEM_DOMAIN_GART)
 745                 flags |= TTM_PL_FLAG_TT;
 746
 747         return flags;
 748 }
 749
 750 int
 751 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 752                            struct drm_file *file_priv)
 753 {
 754         struct drm_nouveau_gem_cpu_prep *req = data;
 755         struct drm_gem_object *gem;
 756         struct nouveau_bo *nvbo;
 757         bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
 758         int ret = -EINVAL;
 759
 760         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 761
 762         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 763         if (!gem)
 764                 return ret;
 765         nvbo = nouveau_gem_object(gem);
 766
 767         if (nvbo->cpu_filp) {
 768                 if (nvbo->cpu_filp == file_priv)
 769                         goto out;
 770
 771                 ret = ttm_bo_wait_cpu(&nvbo->bo, no_wait);
 772                 if (ret)
 773                         goto out;
 774         }
 775
 776         if (req->flags & NOUVEAU_GEM_CPU_PREP_NOBLOCK) {
 777                 spin_lock(&nvbo->bo.lock);
 778                 ret = ttm_bo_wait(&nvbo->bo, false, false, no_wait);
 779                 spin_unlock(&nvbo->bo.lock);
 780         } else {
 781                 ret = ttm_bo_synccpu_write_grab(&nvbo->bo, no_wait);
 782                 if (ret == 0)
 783                         nvbo->cpu_filp = file_priv;
 784         }
 785
 786 out:
 787         drm_gem_object_unreference_unlocked(gem);
 788         return ret;
 789 }
 790
 791 int
 792 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 793                            struct drm_file *file_priv)
 794 {
 795         struct drm_nouveau_gem_cpu_prep *req = data;
 796         struct drm_gem_object *gem;
 797         struct nouveau_bo *nvbo;
 798         int ret = -EINVAL;
 799
 800         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 801
 802         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 803         if (!gem)
 804                 return ret;
 805         nvbo = nouveau_gem_object(gem);
 806
 807         if (nvbo->cpu_filp != file_priv)
 808                 goto out;
 809         nvbo->cpu_filp = NULL;
 810
 811         ttm_bo_synccpu_write_release(&nvbo->bo);
 812         ret = 0;
 813
 814 out:
 815         drm_gem_object_unreference_unlocked(gem);
 816         return ret;
 817 }
 818
 819 int
 820 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 821                        struct drm_file *file_priv)
 822 {
 823         struct drm_nouveau_gem_info *req = data;
 824         struct drm_gem_object *gem;
 825         int ret;
 826
 827         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 828
 829         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 830         if (!gem)
 831                 return -EINVAL;
 832
 833         ret = nouveau_gem_info(gem, req);
 834         drm_gem_object_unreference_unlocked(gem);
 835         return ret;
 836 }
 837