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         uint64_t flags;
 184
 185         if (!valid_domains || (!read_domains && !write_domains))
 186                 return -EINVAL;
 187
 188         if (write_domains) {
 189                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 190                     (write_domains & NOUVEAU_GEM_DOMAIN_VRAM))
 191                         flags = TTM_PL_FLAG_VRAM;
 192                 else
 193                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_GART) &&
 194                     (write_domains & NOUVEAU_GEM_DOMAIN_GART))
 195                         flags = TTM_PL_FLAG_TT;
 196                 else
 197                         return -EINVAL;
 198         } else {
 199                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 200                     (read_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 201                     bo->mem.mem_type == TTM_PL_VRAM)
 202                         flags = TTM_PL_FLAG_VRAM;
 203                 else
 204                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_GART) &&
 205                     (read_domains & NOUVEAU_GEM_DOMAIN_GART) &&
 206                     bo->mem.mem_type == TTM_PL_TT)
 207                         flags = TTM_PL_FLAG_TT;
 208                 else
 209                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 210                     (read_domains & NOUVEAU_GEM_DOMAIN_VRAM))
 211                         flags = TTM_PL_FLAG_VRAM;
 212                 else
 213                         flags = TTM_PL_FLAG_TT;
 214         }
 215
 216         nouveau_bo_placement_set(nvbo, flags);
 217         return 0;
 218 }
 219
 220 struct validate_op {
 221         struct list_head vram_list;
 222         struct list_head gart_list;
 223         struct list_head both_list;
 224 };
 225
 226 static void
 227 validate_fini_list(struct list_head *list, struct nouveau_fence *fence)
 228 {
 229         struct list_head *entry, *tmp;
 230         struct nouveau_bo *nvbo;
 231
 232         list_for_each_safe(entry, tmp, list) {
 233                 nvbo = list_entry(entry, struct nouveau_bo, entry);
 234                 if (likely(fence)) {
 235                         struct nouveau_fence *prev_fence;
 236
 237                         spin_lock(&nvbo->bo.lock);
 238                         prev_fence = nvbo->bo.sync_obj;
 239                         nvbo->bo.sync_obj = nouveau_fence_ref(fence);
 240                         spin_unlock(&nvbo->bo.lock);
 241                         nouveau_fence_unref((void *)&prev_fence);
 242                 }
 243
 244                 if (unlikely(nvbo->validate_mapped)) {
 245                         ttm_bo_kunmap(&nvbo->kmap);
 246                         nvbo->validate_mapped = false;
 247                 }
 248
 249                 list_del(&nvbo->entry);
 250                 nvbo->reserved_by = NULL;
 251                 ttm_bo_unreserve(&nvbo->bo);
 252                 drm_gem_object_unreference(nvbo->gem);
 253         }
 254 }
 255
 256 static void
 257 validate_fini(struct validate_op *op, struct nouveau_fence* fence)
 258 {
 259         validate_fini_list(&op->vram_list, fence);
 260         validate_fini_list(&op->gart_list, fence);
 261         validate_fini_list(&op->both_list, fence);
 262 }
 263
 264 static int
 265 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
 266               struct drm_nouveau_gem_pushbuf_bo *pbbo,
 267               int nr_buffers, struct validate_op *op)
 268 {
 269         struct drm_device *dev = chan->dev;
 270         struct drm_nouveau_private *dev_priv = dev->dev_private;
 271         uint32_t sequence;
 272         int trycnt = 0;
 273         int ret, i;
 274
 275         sequence = atomic_add_return(1, &dev_priv->ttm.validate_sequence);
 276 retry:
 277         if (++trycnt > 100000) {
 278                 NV_ERROR(dev, "%s failed and gave up.\n", __func__);
 279                 return -EINVAL;
 280         }
 281
 282         for (i = 0; i < nr_buffers; i++) {
 283                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
 284                 struct drm_gem_object *gem;
 285                 struct nouveau_bo *nvbo;
 286
 287                 gem = drm_gem_object_lookup(dev, file_priv, b->handle);
 288                 if (!gem) {
 289                         NV_ERROR(dev, "Unknown handle 0x%08x\n", b->handle);
 290                         validate_fini(op, NULL);
 291                         return -EINVAL;
 292                 }
 293                 nvbo = gem->driver_private;
 294
 295                 if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
 296                         NV_ERROR(dev, "multiple instances of buffer %d on "
 297                                       "validation list\n", b->handle);
 298                         validate_fini(op, NULL);
 299                         return -EINVAL;
 300                 }
 301
 302                 ret = ttm_bo_reserve(&nvbo->bo, false, false, true, sequence);
 303                 if (ret) {
 304                         validate_fini(op, NULL);
 305                         if (ret == -EAGAIN)
 306                                 ret = ttm_bo_wait_unreserved(&nvbo->bo, false);
 307                         drm_gem_object_unreference(gem);
 308                         if (ret) {
 309                                 NV_ERROR(dev, "fail reserve\n");
 310                                 return ret;
 311                         }
 312                         goto retry;
 313                 }
 314
 315                 b->user_priv = (uint64_t)(unsigned long)nvbo;
 316                 nvbo->reserved_by = file_priv;
 317                 nvbo->pbbo_index = i;
 318                 if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 319                     (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
 320                         list_add_tail(&nvbo->entry, &op->both_list);
 321                 else
 322                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 323                         list_add_tail(&nvbo->entry, &op->vram_list);
 324                 else
 325                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 326                         list_add_tail(&nvbo->entry, &op->gart_list);
 327                 else {
 328                         NV_ERROR(dev, "invalid valid domains: 0x%08x\n",
 329                                  b->valid_domains);
 330                         list_add_tail(&nvbo->entry, &op->both_list);
 331                         validate_fini(op, NULL);
 332                         return -EINVAL;
 333                 }
 334
 335                 if (unlikely(atomic_read(&nvbo->bo.cpu_writers) > 0)) {
 336                         validate_fini(op, NULL);
 337
 338                         if (nvbo->cpu_filp == file_priv) {
 339                                 NV_ERROR(dev, "bo %p mapped by process trying "
 340                                               "to validate it!\n", nvbo);
 341                                 return -EINVAL;
 342                         }
 343
 344                         ret = ttm_bo_wait_cpu(&nvbo->bo, false);
 345                         if (ret) {
 346                                 NV_ERROR(dev, "fail wait_cpu\n");
 347                                 return ret;
 348                         }
 349                         goto retry;
 350                 }
 351         }
 352
 353         return 0;
 354 }
 355
 356 static int
 357 validate_list(struct nouveau_channel *chan, struct list_head *list,
 358               struct drm_nouveau_gem_pushbuf_bo *pbbo, uint64_t user_pbbo_ptr)
 359 {
 360         struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
 361                                 (void __force __user *)(uintptr_t)user_pbbo_ptr;
 362         struct drm_device *dev = chan->dev;
 363         struct nouveau_bo *nvbo;
 364         int ret, relocs = 0;
 365
 366         list_for_each_entry(nvbo, list, entry) {
 367                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
 368                 struct nouveau_fence *prev_fence = nvbo->bo.sync_obj;
 369
 370                 if (prev_fence && nouveau_fence_channel(prev_fence) != chan) {
 371                         spin_lock(&nvbo->bo.lock);
 372                         ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 373                         spin_unlock(&nvbo->bo.lock);
 374                         if (unlikely(ret)) {
 375                                 NV_ERROR(dev, "fail wait other chan\n");
 376                                 return ret;
 377                         }
 378                 }
 379
 380                 ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
 381                                              b->write_domains,
 382                                              b->valid_domains);
 383                 if (unlikely(ret)) {
 384                         NV_ERROR(dev, "fail set_domain\n");
 385                         return ret;
 386                 }
 387
 388                 nvbo->channel = chan;
 389                 ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 390                                       false, false);
 391                 nvbo->channel = NULL;
 392                 if (unlikely(ret)) {
 393                         NV_ERROR(dev, "fail ttm_validate\n");
 394                         return ret;
 395                 }
 396
 397                 if (nvbo->bo.offset == b->presumed.offset &&
 398                     ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
 399                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
 400                      (nvbo->bo.mem.mem_type == TTM_PL_TT &&
 401                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
 402                         continue;
 403
 404                 if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 405                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
 406                 else
 407                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
 408                 b->presumed.offset = nvbo->bo.offset;
 409                 b->presumed.valid = 0;
 410                 relocs++;
 411
 412                 if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index].presumed,
 413                                      &b->presumed, sizeof(b->presumed)))
 414                         return -EFAULT;
 415         }
 416
 417         return relocs;
 418 }
 419
 420 static int
 421 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 422                              struct drm_file *file_priv,
 423                              struct drm_nouveau_gem_pushbuf_bo *pbbo,
 424                              uint64_t user_buffers, int nr_buffers,
 425                              struct validate_op *op, int *apply_relocs)
 426 {
 427         struct drm_device *dev = chan->dev;
 428         int ret, relocs = 0;
 429
 430         INIT_LIST_HEAD(&op->vram_list);
 431         INIT_LIST_HEAD(&op->gart_list);
 432         INIT_LIST_HEAD(&op->both_list);
 433
 434         if (nr_buffers == 0)
 435                 return 0;
 436
 437         ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
 438         if (unlikely(ret)) {
 439                 NV_ERROR(dev, "validate_init\n");
 440                 return ret;
 441         }
 442
 443         ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
 444         if (unlikely(ret < 0)) {
 445                 NV_ERROR(dev, "validate vram_list\n");
 446                 validate_fini(op, NULL);
 447                 return ret;
 448         }
 449         relocs += ret;
 450
 451         ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
 452         if (unlikely(ret < 0)) {
 453                 NV_ERROR(dev, "validate gart_list\n");
 454                 validate_fini(op, NULL);
 455                 return ret;
 456         }
 457         relocs += ret;
 458
 459         ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
 460         if (unlikely(ret < 0)) {
 461                 NV_ERROR(dev, "validate both_list\n");
 462                 validate_fini(op, NULL);
 463                 return ret;
 464         }
 465         relocs += ret;
 466
 467         *apply_relocs = relocs;
 468         return 0;
 469 }
 470
 471 static inline void *
 472 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
 473 {
 474         void *mem;
 475         void __user *userptr = (void __force __user *)(uintptr_t)user;
 476
 477         mem = kmalloc(nmemb * size, GFP_KERNEL);
 478         if (!mem)
 479                 return ERR_PTR(-ENOMEM);
 480
 481         if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
 482                 kfree(mem);
 483                 return ERR_PTR(-EFAULT);
 484         }
 485
 486         return mem;
 487 }
 488
 489 static int
 490 nouveau_gem_pushbuf_reloc_apply(struct drm_device *dev,
 491                                 struct drm_nouveau_gem_pushbuf *req,
 492                                 struct drm_nouveau_gem_pushbuf_bo *bo)
 493 {
 494         struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
 495         int ret = 0;
 496         unsigned i;
 497
 498         reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
 499         if (IS_ERR(reloc))
 500                 return PTR_ERR(reloc);
 501
 502         for (i = 0; i < req->nr_relocs; i++) {
 503                 struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
 504                 struct drm_nouveau_gem_pushbuf_bo *b;
 505                 struct nouveau_bo *nvbo;
 506                 uint32_t data;
 507
 508                 if (unlikely(r->bo_index > req->nr_buffers)) {
 509                         NV_ERROR(dev, "reloc bo index invalid\n");
 510                         ret = -EINVAL;
 511                         break;
 512                 }
 513
 514                 b = &bo[r->bo_index];
 515                 if (b->presumed.valid)
 516                         continue;
 517
 518                 if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
 519                         NV_ERROR(dev, "reloc container bo index invalid\n");
 520                         ret = -EINVAL;
 521                         break;
 522                 }
 523                 nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
 524
 525                 if (unlikely(r->reloc_bo_offset + 4 >
 526                              nvbo->bo.mem.num_pages << PAGE_SHIFT)) {
 527                         NV_ERROR(dev, "reloc outside of bo\n");
 528                         ret = -EINVAL;
 529                         break;
 530                 }
 531
 532                 if (!nvbo->kmap.virtual) {
 533                         ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages,
 534                                           &nvbo->kmap);
 535                         if (ret) {
 536                                 NV_ERROR(dev, "failed kmap for reloc\n");
 537                                 break;
 538                         }
 539                         nvbo->validate_mapped = true;
 540                 }
 541
 542                 if (r->flags & NOUVEAU_GEM_RELOC_LOW)
 543                         data = b->presumed.offset + r->data;
 544                 else
 545                 if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
 546                         data = (b->presumed.offset + r->data) >> 32;
 547                 else
 548                         data = r->data;
 549
 550                 if (r->flags & NOUVEAU_GEM_RELOC_OR) {
 551                         if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
 552                                 data |= r->tor;
 553                         else
 554                                 data |= r->vor;
 555                 }
 556
 557                 spin_lock(&nvbo->bo.lock);
 558                 ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 559                 spin_unlock(&nvbo->bo.lock);
 560                 if (ret) {
 561                         NV_ERROR(dev, "reloc wait_idle failed: %d\n", ret);
 562                         break;
 563                 }
 564
 565                 nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
 566         }
 567
 568         kfree(reloc);
 569         return ret;
 570 }
 571
 572 int
 573 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 574                           struct drm_file *file_priv)
 575 {
 576         struct drm_nouveau_private *dev_priv = dev->dev_private;
 577         struct drm_nouveau_gem_pushbuf *req = data;
 578         struct drm_nouveau_gem_pushbuf_push *push;
 579         struct drm_nouveau_gem_pushbuf_bo *bo;
 580         struct nouveau_channel *chan;
 581         struct validate_op op;
 582         struct nouveau_fence *fence = 0;
 583         int i, j, ret = 0, do_reloc = 0;
 584
 585         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 586         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
 587
 588         req->vram_available = dev_priv->fb_aper_free;
 589         req->gart_available = dev_priv->gart_info.aper_free;
 590         if (unlikely(req->nr_push == 0))
 591                 goto out_next;
 592
 593         if (unlikely(req->nr_push > NOUVEAU_GEM_MAX_PUSH)) {
 594                 NV_ERROR(dev, "pushbuf push count exceeds limit: %d max %d\n",
 595                          req->nr_push, NOUVEAU_GEM_MAX_PUSH);
 596                 return -EINVAL;
 597         }
 598
 599         if (unlikely(req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS)) {
 600                 NV_ERROR(dev, "pushbuf bo count exceeds limit: %d max %d\n",
 601                          req->nr_buffers, NOUVEAU_GEM_MAX_BUFFERS);
 602                 return -EINVAL;
 603         }
 604
 605         if (unlikely(req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS)) {
 606                 NV_ERROR(dev, "pushbuf reloc count exceeds limit: %d max %d\n",
 607                          req->nr_relocs, NOUVEAU_GEM_MAX_RELOCS);
 608                 return -EINVAL;
 609         }
 610
 611         push = u_memcpya(req->push, req->nr_push, sizeof(*push));
 612         if (IS_ERR(push))
 613                 return PTR_ERR(push);
 614
 615         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 616         if (IS_ERR(bo)) {
 617                 kfree(push);
 618                 return PTR_ERR(bo);
 619         }
 620
 621         mutex_lock(&dev->struct_mutex);
 622
 623         /* Validate buffer list */
 624         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 625                                            req->nr_buffers, &op, &do_reloc);
 626         if (ret) {
 627                 NV_ERROR(dev, "validate: %d\n", ret);
 628                 goto out;
 629         }
 630
 631         /* Apply any relocations that are required */
 632         if (do_reloc) {
 633                 ret = nouveau_gem_pushbuf_reloc_apply(dev, req, bo);
 634                 if (ret) {
 635                         NV_ERROR(dev, "reloc apply: %d\n", ret);
 636                         goto out;
 637                 }
 638         }
 639
 640         if (chan->dma.ib_max) {
 641                 ret = nouveau_dma_wait(chan, req->nr_push + 1, 6);
 642                 if (ret) {
 643                         NV_INFO(dev, "nv50cal_space: %d\n", ret);
 644                         goto out;
 645                 }
 646
 647                 for (i = 0; i < req->nr_push; i++) {
 648                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 649                                 bo[push[i].bo_index].user_priv;
 650
 651                         nv50_dma_push(chan, nvbo, push[i].offset,
 652                                       push[i].length);
 653                 }
 654         } else
 655         if (dev_priv->card_type >= NV_20) {
 656                 ret = RING_SPACE(chan, req->nr_push * 2);
 657                 if (ret) {
 658                         NV_ERROR(dev, "cal_space: %d\n", ret);
 659                         goto out;
 660                 }
 661
 662                 for (i = 0; i < req->nr_push; i++) {
 663                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 664                                 bo[push[i].bo_index].user_priv;
 665                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 666
 667                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 668                                         push[i].offset) | 2);
 669                         OUT_RING(chan, 0);
 670                 }
 671         } else {
 672                 ret = RING_SPACE(chan, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
 673                 if (ret) {
 674                         NV_ERROR(dev, "jmp_space: %d\n", ret);
 675                         goto out;
 676                 }
 677
 678                 for (i = 0; i < req->nr_push; i++) {
 679                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 680                                 bo[push[i].bo_index].user_priv;
 681                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 682                         uint32_t cmd;
 683
 684                         cmd = chan->pushbuf_base + ((chan->dma.cur + 2) << 2);
 685                         cmd |= 0x20000000;
 686                         if (unlikely(cmd != req->suffix0)) {
 687                                 if (!nvbo->kmap.virtual) {
 688                                         ret = ttm_bo_kmap(&nvbo->bo, 0,
 689                                                           nvbo->bo.mem.
 690                                                           num_pages,
 691                                                           &nvbo->kmap);
 692                                         if (ret) {
 693                                                 WIND_RING(chan);
 694                                                 goto out;
 695                                         }
 696                                         nvbo->validate_mapped = true;
 697                                 }
 698
 699                                 nouveau_bo_wr32(nvbo, (push[i].offset +
 700                                                 push[i].length - 8) / 4, cmd);
 701                         }
 702
 703                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 704                                         push[i].offset) | 0x20000000);
 705                         OUT_RING(chan, 0);
 706                         for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
 707                                 OUT_RING(chan, 0);
 708                 }
 709         }
 710
 711         ret = nouveau_fence_new(chan, &fence, true);
 712         if (ret) {
 713                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 714                 WIND_RING(chan);
 715                 goto out;
 716         }
 717
 718 out:
 719         validate_fini(&op, fence);
 720         nouveau_fence_unref((void**)&fence);
 721         mutex_unlock(&dev->struct_mutex);
 722         kfree(bo);
 723         kfree(push);
 724
 725 out_next:
 726         if (chan->dma.ib_max) {
 727                 req->suffix0 = 0x00000000;
 728                 req->suffix1 = 0x00000000;
 729         } else
 730         if (dev_priv->card_type >= NV_20) {
 731                 req->suffix0 = 0x00020000;
 732                 req->suffix1 = 0x00000000;
 733         } else {
 734                 req->suffix0 = 0x20000000 |
 735                               (chan->pushbuf_base + ((chan->dma.cur + 2) << 2));
 736                 req->suffix1 = 0x00000000;
 737         }
 738
 739         return ret;
 740 }
 741
 742 static inline uint32_t
 743 domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
 744 {
 745         uint32_t flags = 0;
 746
 747         if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
 748                 flags |= TTM_PL_FLAG_VRAM;
 749         if (domain & NOUVEAU_GEM_DOMAIN_GART)
 750                 flags |= TTM_PL_FLAG_TT;
 751
 752         return flags;
 753 }
 754
 755 int
 756 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 757                            struct drm_file *file_priv)
 758 {
 759         struct drm_nouveau_gem_cpu_prep *req = data;
 760         struct drm_gem_object *gem;
 761         struct nouveau_bo *nvbo;
 762         bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
 763         int ret = -EINVAL;
 764
 765         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 766
 767         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 768         if (!gem)
 769                 return ret;
 770         nvbo = nouveau_gem_object(gem);
 771
 772         if (nvbo->cpu_filp) {
 773                 if (nvbo->cpu_filp == file_priv)
 774                         goto out;
 775
 776                 ret = ttm_bo_wait_cpu(&nvbo->bo, no_wait);
 777                 if (ret)
 778                         goto out;
 779         }
 780
 781         if (req->flags & NOUVEAU_GEM_CPU_PREP_NOBLOCK) {
 782                 spin_lock(&nvbo->bo.lock);
 783                 ret = ttm_bo_wait(&nvbo->bo, false, false, no_wait);
 784                 spin_unlock(&nvbo->bo.lock);
 785         } else {
 786                 ret = ttm_bo_synccpu_write_grab(&nvbo->bo, no_wait);
 787                 if (ret == 0)
 788                         nvbo->cpu_filp = file_priv;
 789         }
 790
 791 out:
 792         drm_gem_object_unreference_unlocked(gem);
 793         return ret;
 794 }
 795
 796 int
 797 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 798                            struct drm_file *file_priv)
 799 {
 800         struct drm_nouveau_gem_cpu_prep *req = data;
 801         struct drm_gem_object *gem;
 802         struct nouveau_bo *nvbo;
 803         int ret = -EINVAL;
 804
 805         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 806
 807         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 808         if (!gem)
 809                 return ret;
 810         nvbo = nouveau_gem_object(gem);
 811
 812         if (nvbo->cpu_filp != file_priv)
 813                 goto out;
 814         nvbo->cpu_filp = NULL;
 815
 816         ttm_bo_synccpu_write_release(&nvbo->bo);
 817         ret = 0;
 818
 819 out:
 820         drm_gem_object_unreference_unlocked(gem);
 821         return ret;
 822 }
 823
 824 int
 825 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 826                        struct drm_file *file_priv)
 827 {
 828         struct drm_nouveau_gem_info *req = data;
 829         struct drm_gem_object *gem;
 830         int ret;
 831
 832         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 833
 834         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 835         if (!gem)
 836                 return -EINVAL;
 837
 838         ret = nouveau_gem_info(gem, req);
 839         drm_gem_object_unreference_unlocked(gem);
 840         return ret;
 841 }
 842