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 out:
 171         drm_gem_object_handle_unreference_unlocked(nvbo->gem);
 172
 173         if (ret)
 174                 drm_gem_object_unreference_unlocked(nvbo->gem);
 175         return ret;
 176 }
 177
 178 static int
 179 nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains,
 180                        uint32_t write_domains, uint32_t valid_domains)
 181 {
 182         struct nouveau_bo *nvbo = gem->driver_private;
 183         struct ttm_buffer_object *bo = &nvbo->bo;
 184         uint32_t domains = valid_domains &
 185                 (write_domains ? write_domains : read_domains);
 186         uint32_t pref_flags = 0, valid_flags = 0;
 187
 188         if (!domains)
 189                 return -EINVAL;
 190
 191         if (valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 192                 valid_flags |= TTM_PL_FLAG_VRAM;
 193
 194         if (valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 195                 valid_flags |= TTM_PL_FLAG_TT;
 196
 197         if ((domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 198             bo->mem.mem_type == TTM_PL_VRAM)
 199                 pref_flags |= TTM_PL_FLAG_VRAM;
 200
 201         else if ((domains & NOUVEAU_GEM_DOMAIN_GART) &&
 202                  bo->mem.mem_type == TTM_PL_TT)
 203                 pref_flags |= TTM_PL_FLAG_TT;
 204
 205         else if (domains & NOUVEAU_GEM_DOMAIN_VRAM)
 206                 pref_flags |= TTM_PL_FLAG_VRAM;
 207
 208         else
 209                 pref_flags |= TTM_PL_FLAG_TT;
 210
 211         nouveau_bo_placement_set(nvbo, pref_flags, valid_flags);
 212
 213         return 0;
 214 }
 215
 216 struct validate_op {
 217         struct list_head vram_list;
 218         struct list_head gart_list;
 219         struct list_head both_list;
 220 };
 221
 222 static void
 223 validate_fini_list(struct list_head *list, struct nouveau_fence *fence)
 224 {
 225         struct list_head *entry, *tmp;
 226         struct nouveau_bo *nvbo;
 227
 228         list_for_each_safe(entry, tmp, list) {
 229                 nvbo = list_entry(entry, struct nouveau_bo, entry);
 230                 if (likely(fence)) {
 231                         struct nouveau_fence *prev_fence;
 232
 233                         spin_lock(&nvbo->bo.lock);
 234                         prev_fence = nvbo->bo.sync_obj;
 235                         nvbo->bo.sync_obj = nouveau_fence_ref(fence);
 236                         spin_unlock(&nvbo->bo.lock);
 237                         nouveau_fence_unref((void *)&prev_fence);
 238                 }
 239
 240                 if (unlikely(nvbo->validate_mapped)) {
 241                         ttm_bo_kunmap(&nvbo->kmap);
 242                         nvbo->validate_mapped = false;
 243                 }
 244
 245                 list_del(&nvbo->entry);
 246                 nvbo->reserved_by = NULL;
 247                 ttm_bo_unreserve(&nvbo->bo);
 248                 drm_gem_object_unreference(nvbo->gem);
 249         }
 250 }
 251
 252 static void
 253 validate_fini(struct validate_op *op, struct nouveau_fence* fence)
 254 {
 255         validate_fini_list(&op->vram_list, fence);
 256         validate_fini_list(&op->gart_list, fence);
 257         validate_fini_list(&op->both_list, fence);
 258 }
 259
 260 static int
 261 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
 262               struct drm_nouveau_gem_pushbuf_bo *pbbo,
 263               int nr_buffers, struct validate_op *op)
 264 {
 265         struct drm_device *dev = chan->dev;
 266         struct drm_nouveau_private *dev_priv = dev->dev_private;
 267         uint32_t sequence;
 268         int trycnt = 0;
 269         int ret, i;
 270
 271         sequence = atomic_add_return(1, &dev_priv->ttm.validate_sequence);
 272 retry:
 273         if (++trycnt > 100000) {
 274                 NV_ERROR(dev, "%s failed and gave up.\n", __func__);
 275                 return -EINVAL;
 276         }
 277
 278         for (i = 0; i < nr_buffers; i++) {
 279                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
 280                 struct drm_gem_object *gem;
 281                 struct nouveau_bo *nvbo;
 282
 283                 gem = drm_gem_object_lookup(dev, file_priv, b->handle);
 284                 if (!gem) {
 285                         NV_ERROR(dev, "Unknown handle 0x%08x\n", b->handle);
 286                         validate_fini(op, NULL);
 287                         return -EINVAL;
 288                 }
 289                 nvbo = gem->driver_private;
 290
 291                 if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
 292                         NV_ERROR(dev, "multiple instances of buffer %d on "
 293                                       "validation list\n", b->handle);
 294                         validate_fini(op, NULL);
 295                         return -EINVAL;
 296                 }
 297
 298                 ret = ttm_bo_reserve(&nvbo->bo, false, false, true, sequence);
 299                 if (ret) {
 300                         validate_fini(op, NULL);
 301                         if (ret == -EAGAIN)
 302                                 ret = ttm_bo_wait_unreserved(&nvbo->bo, false);
 303                         drm_gem_object_unreference(gem);
 304                         if (ret) {
 305                                 NV_ERROR(dev, "fail reserve\n");
 306                                 return ret;
 307                         }
 308                         goto retry;
 309                 }
 310
 311                 b->user_priv = (uint64_t)(unsigned long)nvbo;
 312                 nvbo->reserved_by = file_priv;
 313                 nvbo->pbbo_index = i;
 314                 if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 315                     (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
 316                         list_add_tail(&nvbo->entry, &op->both_list);
 317                 else
 318                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 319                         list_add_tail(&nvbo->entry, &op->vram_list);
 320                 else
 321                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 322                         list_add_tail(&nvbo->entry, &op->gart_list);
 323                 else {
 324                         NV_ERROR(dev, "invalid valid domains: 0x%08x\n",
 325                                  b->valid_domains);
 326                         list_add_tail(&nvbo->entry, &op->both_list);
 327                         validate_fini(op, NULL);
 328                         return -EINVAL;
 329                 }
 330
 331                 if (unlikely(atomic_read(&nvbo->bo.cpu_writers) > 0)) {
 332                         validate_fini(op, NULL);
 333
 334                         if (nvbo->cpu_filp == file_priv) {
 335                                 NV_ERROR(dev, "bo %p mapped by process trying "
 336                                               "to validate it!\n", nvbo);
 337                                 return -EINVAL;
 338                         }
 339
 340                         ret = ttm_bo_wait_cpu(&nvbo->bo, false);
 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                 struct nouveau_fence *prev_fence = nvbo->bo.sync_obj;
 365
 366                 if (prev_fence && nouveau_fence_channel(prev_fence) != chan) {
 367                         spin_lock(&nvbo->bo.lock);
 368                         ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 369                         spin_unlock(&nvbo->bo.lock);
 370                         if (unlikely(ret)) {
 371                                 NV_ERROR(dev, "fail wait other chan\n");
 372                                 return ret;
 373                         }
 374                 }
 375
 376                 ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
 377                                              b->write_domains,
 378                                              b->valid_domains);
 379                 if (unlikely(ret)) {
 380                         NV_ERROR(dev, "fail set_domain\n");
 381                         return ret;
 382                 }
 383
 384                 nvbo->channel = chan;
 385                 ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 386                                       false, false, false);
 387                 nvbo->channel = NULL;
 388                 if (unlikely(ret)) {
 389                         NV_ERROR(dev, "fail ttm_validate\n");
 390                         return ret;
 391                 }
 392
 393                 if (nvbo->bo.offset == b->presumed.offset &&
 394                     ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
 395                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
 396                      (nvbo->bo.mem.mem_type == TTM_PL_TT &&
 397                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
 398                         continue;
 399
 400                 if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 401                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
 402                 else
 403                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
 404                 b->presumed.offset = nvbo->bo.offset;
 405                 b->presumed.valid = 0;
 406                 relocs++;
 407
 408                 if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index].presumed,
 409                                      &b->presumed, sizeof(b->presumed)))
 410                         return -EFAULT;
 411         }
 412
 413         return relocs;
 414 }
 415
 416 static int
 417 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 418                              struct drm_file *file_priv,
 419                              struct drm_nouveau_gem_pushbuf_bo *pbbo,
 420                              uint64_t user_buffers, int nr_buffers,
 421                              struct validate_op *op, int *apply_relocs)
 422 {
 423         struct drm_device *dev = chan->dev;
 424         int ret, relocs = 0;
 425
 426         INIT_LIST_HEAD(&op->vram_list);
 427         INIT_LIST_HEAD(&op->gart_list);
 428         INIT_LIST_HEAD(&op->both_list);
 429
 430         if (nr_buffers == 0)
 431                 return 0;
 432
 433         ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
 434         if (unlikely(ret)) {
 435                 NV_ERROR(dev, "validate_init\n");
 436                 return ret;
 437         }
 438
 439         ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
 440         if (unlikely(ret < 0)) {
 441                 NV_ERROR(dev, "validate vram_list\n");
 442                 validate_fini(op, NULL);
 443                 return ret;
 444         }
 445         relocs += ret;
 446
 447         ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
 448         if (unlikely(ret < 0)) {
 449                 NV_ERROR(dev, "validate gart_list\n");
 450                 validate_fini(op, NULL);
 451                 return ret;
 452         }
 453         relocs += ret;
 454
 455         ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
 456         if (unlikely(ret < 0)) {
 457                 NV_ERROR(dev, "validate both_list\n");
 458                 validate_fini(op, NULL);
 459                 return ret;
 460         }
 461         relocs += ret;
 462
 463         *apply_relocs = relocs;
 464         return 0;
 465 }
 466
 467 static inline void *
 468 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
 469 {
 470         void *mem;
 471         void __user *userptr = (void __force __user *)(uintptr_t)user;
 472
 473         mem = kmalloc(nmemb * size, GFP_KERNEL);
 474         if (!mem)
 475                 return ERR_PTR(-ENOMEM);
 476
 477         if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
 478                 kfree(mem);
 479                 return ERR_PTR(-EFAULT);
 480         }
 481
 482         return mem;
 483 }
 484
 485 static int
 486 nouveau_gem_pushbuf_reloc_apply(struct drm_device *dev,
 487                                 struct drm_nouveau_gem_pushbuf *req,
 488                                 struct drm_nouveau_gem_pushbuf_bo *bo)
 489 {
 490         struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
 491         int ret = 0;
 492         unsigned i;
 493
 494         reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
 495         if (IS_ERR(reloc))
 496                 return PTR_ERR(reloc);
 497
 498         for (i = 0; i < req->nr_relocs; i++) {
 499                 struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
 500                 struct drm_nouveau_gem_pushbuf_bo *b;
 501                 struct nouveau_bo *nvbo;
 502                 uint32_t data;
 503
 504                 if (unlikely(r->bo_index > req->nr_buffers)) {
 505                         NV_ERROR(dev, "reloc bo index invalid\n");
 506                         ret = -EINVAL;
 507                         break;
 508                 }
 509
 510                 b = &bo[r->bo_index];
 511                 if (b->presumed.valid)
 512                         continue;
 513
 514                 if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
 515                         NV_ERROR(dev, "reloc container bo index invalid\n");
 516                         ret = -EINVAL;
 517                         break;
 518                 }
 519                 nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
 520
 521                 if (unlikely(r->reloc_bo_offset + 4 >
 522                              nvbo->bo.mem.num_pages << PAGE_SHIFT)) {
 523                         NV_ERROR(dev, "reloc outside of bo\n");
 524                         ret = -EINVAL;
 525                         break;
 526                 }
 527
 528                 if (!nvbo->kmap.virtual) {
 529                         ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages,
 530                                           &nvbo->kmap);
 531                         if (ret) {
 532                                 NV_ERROR(dev, "failed kmap for reloc\n");
 533                                 break;
 534                         }
 535                         nvbo->validate_mapped = true;
 536                 }
 537
 538                 if (r->flags & NOUVEAU_GEM_RELOC_LOW)
 539                         data = b->presumed.offset + r->data;
 540                 else
 541                 if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
 542                         data = (b->presumed.offset + r->data) >> 32;
 543                 else
 544                         data = r->data;
 545
 546                 if (r->flags & NOUVEAU_GEM_RELOC_OR) {
 547                         if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
 548                                 data |= r->tor;
 549                         else
 550                                 data |= r->vor;
 551                 }
 552
 553                 spin_lock(&nvbo->bo.lock);
 554                 ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 555                 spin_unlock(&nvbo->bo.lock);
 556                 if (ret) {
 557                         NV_ERROR(dev, "reloc wait_idle failed: %d\n", ret);
 558                         break;
 559                 }
 560
 561                 nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
 562         }
 563
 564         kfree(reloc);
 565         return ret;
 566 }
 567
 568 int
 569 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 570                           struct drm_file *file_priv)
 571 {
 572         struct drm_nouveau_private *dev_priv = dev->dev_private;
 573         struct drm_nouveau_gem_pushbuf *req = data;
 574         struct drm_nouveau_gem_pushbuf_push *push;
 575         struct drm_nouveau_gem_pushbuf_bo *bo;
 576         struct nouveau_channel *chan;
 577         struct validate_op op;
 578         struct nouveau_fence *fence = NULL;
 579         int i, j, ret = 0, do_reloc = 0;
 580
 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         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 761         if (!gem)
 762                 return ret;
 763         nvbo = nouveau_gem_object(gem);
 764
 765         if (nvbo->cpu_filp) {
 766                 if (nvbo->cpu_filp == file_priv)
 767                         goto out;
 768
 769                 ret = ttm_bo_wait_cpu(&nvbo->bo, no_wait);
 770                 if (ret)
 771                         goto out;
 772         }
 773
 774         if (req->flags & NOUVEAU_GEM_CPU_PREP_NOBLOCK) {
 775                 spin_lock(&nvbo->bo.lock);
 776                 ret = ttm_bo_wait(&nvbo->bo, false, false, no_wait);
 777                 spin_unlock(&nvbo->bo.lock);
 778         } else {
 779                 ret = ttm_bo_synccpu_write_grab(&nvbo->bo, no_wait);
 780                 if (ret == 0)
 781                         nvbo->cpu_filp = file_priv;
 782         }
 783
 784 out:
 785         drm_gem_object_unreference_unlocked(gem);
 786         return ret;
 787 }
 788
 789 int
 790 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 791                            struct drm_file *file_priv)
 792 {
 793         struct drm_nouveau_gem_cpu_prep *req = data;
 794         struct drm_gem_object *gem;
 795         struct nouveau_bo *nvbo;
 796         int ret = -EINVAL;
 797
 798         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 799         if (!gem)
 800                 return ret;
 801         nvbo = nouveau_gem_object(gem);
 802
 803         if (nvbo->cpu_filp != file_priv)
 804                 goto out;
 805         nvbo->cpu_filp = NULL;
 806
 807         ttm_bo_synccpu_write_release(&nvbo->bo);
 808         ret = 0;
 809
 810 out:
 811         drm_gem_object_unreference_unlocked(gem);
 812         return ret;
 813 }
 814
 815 int
 816 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 817                        struct drm_file *file_priv)
 818 {
 819         struct drm_nouveau_gem_info *req = data;
 820         struct drm_gem_object *gem;
 821         int ret;
 822
 823         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 824         if (!gem)
 825                 return -EINVAL;
 826
 827         ret = nouveau_gem_info(gem, req);
 828         drm_gem_object_unreference_unlocked(gem);
 829         return ret;
 830 }
 831