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 -ENOENT;
 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                         mutex_unlock(&drm_global_mutex);
 341                         ret = ttm_bo_wait_cpu(&nvbo->bo, false);
 342                         mutex_lock(&drm_global_mutex);
 343                         if (ret) {
 344                                 NV_ERROR(dev, "fail wait_cpu\n");
 345                                 return ret;
 346                         }
 347                         goto retry;
 348                 }
 349         }
 350
 351         return 0;
 352 }
 353
 354 static int
 355 validate_list(struct nouveau_channel *chan, struct list_head *list,
 356               struct drm_nouveau_gem_pushbuf_bo *pbbo, uint64_t user_pbbo_ptr)
 357 {
 358         struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
 359                                 (void __force __user *)(uintptr_t)user_pbbo_ptr;
 360         struct drm_device *dev = chan->dev;
 361         struct nouveau_bo *nvbo;
 362         int ret, relocs = 0;
 363
 364         list_for_each_entry(nvbo, list, entry) {
 365                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
 366
 367                 ret = nouveau_bo_sync_gpu(nvbo, chan);
 368                 if (unlikely(ret)) {
 369                         NV_ERROR(dev, "fail pre-validate sync\n");
 370                         return ret;
 371                 }
 372
 373                 ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
 374                                              b->write_domains,
 375                                              b->valid_domains);
 376                 if (unlikely(ret)) {
 377                         NV_ERROR(dev, "fail set_domain\n");
 378                         return ret;
 379                 }
 380
 381                 nvbo->channel = (b->read_domains & (1 << 31)) ? NULL : chan;
 382                 ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 383                                       false, false, false);
 384                 nvbo->channel = NULL;
 385                 if (unlikely(ret)) {
 386                         NV_ERROR(dev, "fail ttm_validate\n");
 387                         return ret;
 388                 }
 389
 390                 ret = nouveau_bo_sync_gpu(nvbo, chan);
 391                 if (unlikely(ret)) {
 392                         NV_ERROR(dev, "fail post-validate sync\n");
 393                         return ret;
 394                 }
 395
 396                 if (nvbo->bo.offset == b->presumed.offset &&
 397                     ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
 398                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
 399                      (nvbo->bo.mem.mem_type == TTM_PL_TT &&
 400                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
 401                         continue;
 402
 403                 if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 404                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
 405                 else
 406                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
 407                 b->presumed.offset = nvbo->bo.offset;
 408                 b->presumed.valid = 0;
 409                 relocs++;
 410
 411                 if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index].presumed,
 412                                      &b->presumed, sizeof(b->presumed)))
 413                         return -EFAULT;
 414         }
 415
 416         return relocs;
 417 }
 418
 419 static int
 420 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 421                              struct drm_file *file_priv,
 422                              struct drm_nouveau_gem_pushbuf_bo *pbbo,
 423                              uint64_t user_buffers, int nr_buffers,
 424                              struct validate_op *op, int *apply_relocs)
 425 {
 426         struct drm_device *dev = chan->dev;
 427         int ret, relocs = 0;
 428
 429         INIT_LIST_HEAD(&op->vram_list);
 430         INIT_LIST_HEAD(&op->gart_list);
 431         INIT_LIST_HEAD(&op->both_list);
 432
 433         if (nr_buffers == 0)
 434                 return 0;
 435
 436         ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
 437         if (unlikely(ret)) {
 438                 NV_ERROR(dev, "validate_init\n");
 439                 return ret;
 440         }
 441
 442         ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
 443         if (unlikely(ret < 0)) {
 444                 NV_ERROR(dev, "validate vram_list\n");
 445                 validate_fini(op, NULL);
 446                 return ret;
 447         }
 448         relocs += ret;
 449
 450         ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
 451         if (unlikely(ret < 0)) {
 452                 NV_ERROR(dev, "validate gart_list\n");
 453                 validate_fini(op, NULL);
 454                 return ret;
 455         }
 456         relocs += ret;
 457
 458         ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
 459         if (unlikely(ret < 0)) {
 460                 NV_ERROR(dev, "validate both_list\n");
 461                 validate_fini(op, NULL);
 462                 return ret;
 463         }
 464         relocs += ret;
 465
 466         *apply_relocs = relocs;
 467         return 0;
 468 }
 469
 470 static inline void *
 471 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
 472 {
 473         void *mem;
 474         void __user *userptr = (void __force __user *)(uintptr_t)user;
 475
 476         mem = kmalloc(nmemb * size, GFP_KERNEL);
 477         if (!mem)
 478                 return ERR_PTR(-ENOMEM);
 479
 480         if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
 481                 kfree(mem);
 482                 return ERR_PTR(-EFAULT);
 483         }
 484
 485         return mem;
 486 }
 487
 488 static int
 489 nouveau_gem_pushbuf_reloc_apply(struct drm_device *dev,
 490                                 struct drm_nouveau_gem_pushbuf *req,
 491                                 struct drm_nouveau_gem_pushbuf_bo *bo)
 492 {
 493         struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
 494         int ret = 0;
 495         unsigned i;
 496
 497         reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
 498         if (IS_ERR(reloc))
 499                 return PTR_ERR(reloc);
 500
 501         for (i = 0; i < req->nr_relocs; i++) {
 502                 struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
 503                 struct drm_nouveau_gem_pushbuf_bo *b;
 504                 struct nouveau_bo *nvbo;
 505                 uint32_t data;
 506
 507                 if (unlikely(r->bo_index > req->nr_buffers)) {
 508                         NV_ERROR(dev, "reloc bo index invalid\n");
 509                         ret = -EINVAL;
 510                         break;
 511                 }
 512
 513                 b = &bo[r->bo_index];
 514                 if (b->presumed.valid)
 515                         continue;
 516
 517                 if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
 518                         NV_ERROR(dev, "reloc container bo index invalid\n");
 519                         ret = -EINVAL;
 520                         break;
 521                 }
 522                 nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
 523
 524                 if (unlikely(r->reloc_bo_offset + 4 >
 525                              nvbo->bo.mem.num_pages << PAGE_SHIFT)) {
 526                         NV_ERROR(dev, "reloc outside of bo\n");
 527                         ret = -EINVAL;
 528                         break;
 529                 }
 530
 531                 if (!nvbo->kmap.virtual) {
 532                         ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages,
 533                                           &nvbo->kmap);
 534                         if (ret) {
 535                                 NV_ERROR(dev, "failed kmap for reloc\n");
 536                                 break;
 537                         }
 538                         nvbo->validate_mapped = true;
 539                 }
 540
 541                 if (r->flags & NOUVEAU_GEM_RELOC_LOW)
 542                         data = b->presumed.offset + r->data;
 543                 else
 544                 if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
 545                         data = (b->presumed.offset + r->data) >> 32;
 546                 else
 547                         data = r->data;
 548
 549                 if (r->flags & NOUVEAU_GEM_RELOC_OR) {
 550                         if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
 551                                 data |= r->tor;
 552                         else
 553                                 data |= r->vor;
 554                 }
 555
 556                 spin_lock(&nvbo->bo.lock);
 557                 ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 558                 spin_unlock(&nvbo->bo.lock);
 559                 if (ret) {
 560                         NV_ERROR(dev, "reloc wait_idle failed: %d\n", ret);
 561                         break;
 562                 }
 563
 564                 nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
 565         }
 566
 567         kfree(reloc);
 568         return ret;
 569 }
 570
 571 int
 572 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 573                           struct drm_file *file_priv)
 574 {
 575         struct drm_nouveau_private *dev_priv = dev->dev_private;
 576         struct drm_nouveau_gem_pushbuf *req = data;
 577         struct drm_nouveau_gem_pushbuf_push *push;
 578         struct drm_nouveau_gem_pushbuf_bo *bo;
 579         struct nouveau_channel *chan;
 580         struct validate_op op;
 581         struct nouveau_fence *fence = NULL;
 582         int i, j, ret = 0, do_reloc = 0;
 583
 584         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
 585
 586         req->vram_available = dev_priv->fb_aper_free;
 587         req->gart_available = dev_priv->gart_info.aper_free;
 588         if (unlikely(req->nr_push == 0))
 589                 goto out_next;
 590
 591         if (unlikely(req->nr_push > NOUVEAU_GEM_MAX_PUSH)) {
 592                 NV_ERROR(dev, "pushbuf push count exceeds limit: %d max %d\n",
 593                          req->nr_push, NOUVEAU_GEM_MAX_PUSH);
 594                 return -EINVAL;
 595         }
 596
 597         if (unlikely(req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS)) {
 598                 NV_ERROR(dev, "pushbuf bo count exceeds limit: %d max %d\n",
 599                          req->nr_buffers, NOUVEAU_GEM_MAX_BUFFERS);
 600                 return -EINVAL;
 601         }
 602
 603         if (unlikely(req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS)) {
 604                 NV_ERROR(dev, "pushbuf reloc count exceeds limit: %d max %d\n",
 605                          req->nr_relocs, NOUVEAU_GEM_MAX_RELOCS);
 606                 return -EINVAL;
 607         }
 608
 609         push = u_memcpya(req->push, req->nr_push, sizeof(*push));
 610         if (IS_ERR(push))
 611                 return PTR_ERR(push);
 612
 613         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 614         if (IS_ERR(bo)) {
 615                 kfree(push);
 616                 return PTR_ERR(bo);
 617         }
 618
 619         mutex_lock(&dev->struct_mutex);
 620
 621         /* Mark push buffers as being used on PFIFO, the validation code
 622          * will then make sure that if the pushbuf bo moves, that they
 623          * happen on the kernel channel, which will in turn cause a sync
 624          * to happen before we try and submit the push buffer.
 625          */
 626         for (i = 0; i < req->nr_push; i++) {
 627                 if (push[i].bo_index >= req->nr_buffers) {
 628                         NV_ERROR(dev, "push %d buffer not in list\n", i);
 629                         ret = -EINVAL;
 630                         goto out;
 631                 }
 632
 633                 bo[push[i].bo_index].read_domains |= (1 << 31);
 634         }
 635
 636         /* Validate buffer list */
 637         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 638                                            req->nr_buffers, &op, &do_reloc);
 639         if (ret) {
 640                 NV_ERROR(dev, "validate: %d\n", ret);
 641                 goto out;
 642         }
 643
 644         /* Apply any relocations that are required */
 645         if (do_reloc) {
 646                 ret = nouveau_gem_pushbuf_reloc_apply(dev, req, bo);
 647                 if (ret) {
 648                         NV_ERROR(dev, "reloc apply: %d\n", ret);
 649                         goto out;
 650                 }
 651         }
 652
 653         if (chan->dma.ib_max) {
 654                 ret = nouveau_dma_wait(chan, req->nr_push + 1, 6);
 655                 if (ret) {
 656                         NV_INFO(dev, "nv50cal_space: %d\n", ret);
 657                         goto out;
 658                 }
 659
 660                 for (i = 0; i < req->nr_push; i++) {
 661                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 662                                 bo[push[i].bo_index].user_priv;
 663
 664                         nv50_dma_push(chan, nvbo, push[i].offset,
 665                                       push[i].length);
 666                 }
 667         } else
 668         if (dev_priv->chipset >= 0x25) {
 669                 ret = RING_SPACE(chan, req->nr_push * 2);
 670                 if (ret) {
 671                         NV_ERROR(dev, "cal_space: %d\n", ret);
 672                         goto out;
 673                 }
 674
 675                 for (i = 0; i < req->nr_push; i++) {
 676                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 677                                 bo[push[i].bo_index].user_priv;
 678                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 679
 680                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 681                                         push[i].offset) | 2);
 682                         OUT_RING(chan, 0);
 683                 }
 684         } else {
 685                 ret = RING_SPACE(chan, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
 686                 if (ret) {
 687                         NV_ERROR(dev, "jmp_space: %d\n", ret);
 688                         goto out;
 689                 }
 690
 691                 for (i = 0; i < req->nr_push; i++) {
 692                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 693                                 bo[push[i].bo_index].user_priv;
 694                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 695                         uint32_t cmd;
 696
 697                         cmd = chan->pushbuf_base + ((chan->dma.cur + 2) << 2);
 698                         cmd |= 0x20000000;
 699                         if (unlikely(cmd != req->suffix0)) {
 700                                 if (!nvbo->kmap.virtual) {
 701                                         ret = ttm_bo_kmap(&nvbo->bo, 0,
 702                                                           nvbo->bo.mem.
 703                                                           num_pages,
 704                                                           &nvbo->kmap);
 705                                         if (ret) {
 706                                                 WIND_RING(chan);
 707                                                 goto out;
 708                                         }
 709                                         nvbo->validate_mapped = true;
 710                                 }
 711
 712                                 nouveau_bo_wr32(nvbo, (push[i].offset +
 713                                                 push[i].length - 8) / 4, cmd);
 714                         }
 715
 716                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 717                                         push[i].offset) | 0x20000000);
 718                         OUT_RING(chan, 0);
 719                         for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
 720                                 OUT_RING(chan, 0);
 721                 }
 722         }
 723
 724         ret = nouveau_fence_new(chan, &fence, true);
 725         if (ret) {
 726                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 727                 WIND_RING(chan);
 728                 goto out;
 729         }
 730
 731 out:
 732         validate_fini(&op, fence);
 733         nouveau_fence_unref((void**)&fence);
 734         mutex_unlock(&dev->struct_mutex);
 735         kfree(bo);
 736         kfree(push);
 737
 738 out_next:
 739         if (chan->dma.ib_max) {
 740                 req->suffix0 = 0x00000000;
 741                 req->suffix1 = 0x00000000;
 742         } else
 743         if (dev_priv->chipset >= 0x25) {
 744                 req->suffix0 = 0x00020000;
 745                 req->suffix1 = 0x00000000;
 746         } else {
 747                 req->suffix0 = 0x20000000 |
 748                               (chan->pushbuf_base + ((chan->dma.cur + 2) << 2));
 749                 req->suffix1 = 0x00000000;
 750         }
 751
 752         return ret;
 753 }
 754
 755 static inline uint32_t
 756 domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
 757 {
 758         uint32_t flags = 0;
 759
 760         if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
 761                 flags |= TTM_PL_FLAG_VRAM;
 762         if (domain & NOUVEAU_GEM_DOMAIN_GART)
 763                 flags |= TTM_PL_FLAG_TT;
 764
 765         return flags;
 766 }
 767
 768 int
 769 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 770                            struct drm_file *file_priv)
 771 {
 772         struct drm_nouveau_gem_cpu_prep *req = data;
 773         struct drm_gem_object *gem;
 774         struct nouveau_bo *nvbo;
 775         bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
 776         int ret = -EINVAL;
 777
 778         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 779         if (!gem)
 780                 return -ENOENT;
 781         nvbo = nouveau_gem_object(gem);
 782
 783         if (nvbo->cpu_filp) {
 784                 if (nvbo->cpu_filp == file_priv)
 785                         goto out;
 786
 787                 ret = ttm_bo_wait_cpu(&nvbo->bo, no_wait);
 788                 if (ret)
 789                         goto out;
 790         }
 791
 792         if (req->flags & NOUVEAU_GEM_CPU_PREP_NOBLOCK) {
 793                 spin_lock(&nvbo->bo.lock);
 794                 ret = ttm_bo_wait(&nvbo->bo, false, false, no_wait);
 795                 spin_unlock(&nvbo->bo.lock);
 796         } else {
 797                 ret = ttm_bo_synccpu_write_grab(&nvbo->bo, no_wait);
 798                 if (ret == 0)
 799                         nvbo->cpu_filp = file_priv;
 800         }
 801
 802 out:
 803         drm_gem_object_unreference_unlocked(gem);
 804         return ret;
 805 }
 806
 807 int
 808 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 809                            struct drm_file *file_priv)
 810 {
 811         struct drm_nouveau_gem_cpu_prep *req = data;
 812         struct drm_gem_object *gem;
 813         struct nouveau_bo *nvbo;
 814         int ret = -EINVAL;
 815
 816         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 817         if (!gem)
 818                 return -ENOENT;
 819         nvbo = nouveau_gem_object(gem);
 820
 821         if (nvbo->cpu_filp != file_priv)
 822                 goto out;
 823         nvbo->cpu_filp = NULL;
 824
 825         ttm_bo_synccpu_write_release(&nvbo->bo);
 826         ret = 0;
 827
 828 out:
 829         drm_gem_object_unreference_unlocked(gem);
 830         return ret;
 831 }
 832
 833 int
 834 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 835                        struct drm_file *file_priv)
 836 {
 837         struct drm_nouveau_gem_info *req = data;
 838         struct drm_gem_object *gem;
 839         int ret;
 840
 841         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 842         if (!gem)
 843                 return -ENOENT;
 844
 845         ret = nouveau_gem_info(gem, req);
 846         drm_gem_object_unreference_unlocked(gem);
 847         return ret;
 848 }
 849