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                 list_del(&nvbo->entry);
 245                 nvbo->reserved_by = NULL;
 246                 ttm_bo_unreserve(&nvbo->bo);
 247                 drm_gem_object_unreference(nvbo->gem);
 248         }
 249 }
 250
 251 static void
 252 validate_fini(struct validate_op *op, struct nouveau_fence* fence)
 253 {
 254         validate_fini_list(&op->vram_list, fence);
 255         validate_fini_list(&op->gart_list, fence);
 256         validate_fini_list(&op->both_list, fence);
 257 }
 258
 259 static int
 260 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
 261               struct drm_nouveau_gem_pushbuf_bo *pbbo,
 262               int nr_buffers, struct validate_op *op)
 263 {
 264         struct drm_device *dev = chan->dev;
 265         struct drm_nouveau_private *dev_priv = dev->dev_private;
 266         uint32_t sequence;
 267         int trycnt = 0;
 268         int ret, i;
 269
 270         sequence = atomic_add_return(1, &dev_priv->ttm.validate_sequence);
 271 retry:
 272         if (++trycnt > 100000) {
 273                 NV_ERROR(dev, "%s failed and gave up.\n", __func__);
 274                 return -EINVAL;
 275         }
 276
 277         for (i = 0; i < nr_buffers; i++) {
 278                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
 279                 struct drm_gem_object *gem;
 280                 struct nouveau_bo *nvbo;
 281
 282                 gem = drm_gem_object_lookup(dev, file_priv, b->handle);
 283                 if (!gem) {
 284                         NV_ERROR(dev, "Unknown handle 0x%08x\n", b->handle);
 285                         validate_fini(op, NULL);
 286                         return -EINVAL;
 287                 }
 288                 nvbo = gem->driver_private;
 289
 290                 if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
 291                         NV_ERROR(dev, "multiple instances of buffer %d on "
 292                                       "validation list\n", b->handle);
 293                         validate_fini(op, NULL);
 294                         return -EINVAL;
 295                 }
 296
 297                 ret = ttm_bo_reserve(&nvbo->bo, false, false, true, sequence);
 298                 if (ret) {
 299                         validate_fini(op, NULL);
 300                         if (ret == -EAGAIN)
 301                                 ret = ttm_bo_wait_unreserved(&nvbo->bo, false);
 302                         drm_gem_object_unreference(gem);
 303                         if (ret)
 304                                 return ret;
 305                         goto retry;
 306                 }
 307
 308                 nvbo->reserved_by = file_priv;
 309                 nvbo->pbbo_index = i;
 310                 if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 311                     (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
 312                         list_add_tail(&nvbo->entry, &op->both_list);
 313                 else
 314                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 315                         list_add_tail(&nvbo->entry, &op->vram_list);
 316                 else
 317                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 318                         list_add_tail(&nvbo->entry, &op->gart_list);
 319                 else {
 320                         NV_ERROR(dev, "invalid valid domains: 0x%08x\n",
 321                                  b->valid_domains);
 322                         list_add_tail(&nvbo->entry, &op->both_list);
 323                         validate_fini(op, NULL);
 324                         return -EINVAL;
 325                 }
 326
 327                 if (unlikely(atomic_read(&nvbo->bo.cpu_writers) > 0)) {
 328                         validate_fini(op, NULL);
 329
 330                         if (nvbo->cpu_filp == file_priv) {
 331                                 NV_ERROR(dev, "bo %p mapped by process trying "
 332                                               "to validate it!\n", nvbo);
 333                                 return -EINVAL;
 334                         }
 335
 336                         ret = ttm_bo_wait_cpu(&nvbo->bo, false);
 337                         if (ret)
 338                                 return ret;
 339                         goto retry;
 340                 }
 341         }
 342
 343         return 0;
 344 }
 345
 346 static int
 347 validate_list(struct nouveau_channel *chan, struct list_head *list,
 348               struct drm_nouveau_gem_pushbuf_bo *pbbo, uint64_t user_pbbo_ptr)
 349 {
 350         struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
 351                                 (void __force __user *)(uintptr_t)user_pbbo_ptr;
 352         struct nouveau_bo *nvbo;
 353         int ret, relocs = 0;
 354
 355         list_for_each_entry(nvbo, list, entry) {
 356                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
 357                 struct nouveau_fence *prev_fence = nvbo->bo.sync_obj;
 358
 359                 if (prev_fence && nouveau_fence_channel(prev_fence) != chan) {
 360                         spin_lock(&nvbo->bo.lock);
 361                         ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 362                         spin_unlock(&nvbo->bo.lock);
 363                         if (unlikely(ret))
 364                                 return ret;
 365                 }
 366
 367                 ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
 368                                              b->write_domains,
 369                                              b->valid_domains);
 370                 if (unlikely(ret))
 371                         return ret;
 372
 373                 nvbo->channel = chan;
 374                 ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 375                                       false, false);
 376                 nvbo->channel = NULL;
 377                 if (unlikely(ret))
 378                         return ret;
 379
 380                 if (nvbo->bo.offset == b->presumed_offset &&
 381                     ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
 382                       b->presumed_domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
 383                      (nvbo->bo.mem.mem_type == TTM_PL_TT &&
 384                       b->presumed_domain & NOUVEAU_GEM_DOMAIN_GART)))
 385                         continue;
 386
 387                 if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 388                         b->presumed_domain = NOUVEAU_GEM_DOMAIN_GART;
 389                 else
 390                         b->presumed_domain = NOUVEAU_GEM_DOMAIN_VRAM;
 391                 b->presumed_offset = nvbo->bo.offset;
 392                 b->presumed_ok = 0;
 393                 relocs++;
 394
 395                 if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index], b, sizeof(*b)))
 396                         return -EFAULT;
 397         }
 398
 399         return relocs;
 400 }
 401
 402 static int
 403 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 404                              struct drm_file *file_priv,
 405                              struct drm_nouveau_gem_pushbuf_bo *pbbo,
 406                              uint64_t user_buffers, int nr_buffers,
 407                              struct validate_op *op, int *apply_relocs)
 408 {
 409         int ret, relocs = 0;
 410
 411         INIT_LIST_HEAD(&op->vram_list);
 412         INIT_LIST_HEAD(&op->gart_list);
 413         INIT_LIST_HEAD(&op->both_list);
 414
 415         if (nr_buffers == 0)
 416                 return 0;
 417
 418         ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
 419         if (unlikely(ret))
 420                 return ret;
 421
 422         ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
 423         if (unlikely(ret < 0)) {
 424                 validate_fini(op, NULL);
 425                 return ret;
 426         }
 427         relocs += ret;
 428
 429         ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
 430         if (unlikely(ret < 0)) {
 431                 validate_fini(op, NULL);
 432                 return ret;
 433         }
 434         relocs += ret;
 435
 436         ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
 437         if (unlikely(ret < 0)) {
 438                 validate_fini(op, NULL);
 439                 return ret;
 440         }
 441         relocs += ret;
 442
 443         *apply_relocs = relocs;
 444         return 0;
 445 }
 446
 447 static inline void *
 448 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
 449 {
 450         void *mem;
 451         void __user *userptr = (void __force __user *)(uintptr_t)user;
 452
 453         mem = kmalloc(nmemb * size, GFP_KERNEL);
 454         if (!mem)
 455                 return ERR_PTR(-ENOMEM);
 456
 457         if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
 458                 kfree(mem);
 459                 return ERR_PTR(-EFAULT);
 460         }
 461
 462         return mem;
 463 }
 464
 465 static int
 466 nouveau_gem_pushbuf_reloc_apply(struct nouveau_channel *chan, int nr_bo,
 467                                 struct drm_nouveau_gem_pushbuf_bo *bo,
 468                                 unsigned nr_relocs, uint64_t ptr_relocs,
 469                                 unsigned nr_dwords, unsigned first_dword,
 470                                 uint32_t *pushbuf, bool is_iomem)
 471 {
 472         struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
 473         struct drm_device *dev = chan->dev;
 474         int ret = 0;
 475         unsigned i;
 476
 477         reloc = u_memcpya(ptr_relocs, nr_relocs, sizeof(*reloc));
 478         if (IS_ERR(reloc))
 479                 return PTR_ERR(reloc);
 480
 481         for (i = 0; i < nr_relocs; i++) {
 482                 struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
 483                 struct drm_nouveau_gem_pushbuf_bo *b;
 484                 uint32_t data;
 485
 486                 if (r->bo_index >= nr_bo || r->reloc_index < first_dword ||
 487                     r->reloc_index >= first_dword + nr_dwords) {
 488                         NV_ERROR(dev, "Bad relocation %d\n", i);
 489                         NV_ERROR(dev, "  bo: %d max %d\n", r->bo_index, nr_bo);
 490                         NV_ERROR(dev, "  id: %d max %d\n", r->reloc_index, nr_dwords);
 491                         ret = -EINVAL;
 492                         break;
 493                 }
 494
 495                 b = &bo[r->bo_index];
 496                 if (b->presumed_ok)
 497                         continue;
 498
 499                 if (r->flags & NOUVEAU_GEM_RELOC_LOW)
 500                         data = b->presumed_offset + r->data;
 501                 else
 502                 if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
 503                         data = (b->presumed_offset + r->data) >> 32;
 504                 else
 505                         data = r->data;
 506
 507                 if (r->flags & NOUVEAU_GEM_RELOC_OR) {
 508                         if (b->presumed_domain == NOUVEAU_GEM_DOMAIN_GART)
 509                                 data |= r->tor;
 510                         else
 511                                 data |= r->vor;
 512                 }
 513
 514                 if (is_iomem)
 515                         iowrite32_native(data, (void __force __iomem *)
 516                                                 &pushbuf[r->reloc_index]);
 517                 else
 518                         pushbuf[r->reloc_index] = data;
 519         }
 520
 521         kfree(reloc);
 522         return ret;
 523 }
 524
 525 int
 526 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 527                           struct drm_file *file_priv)
 528 {
 529         struct drm_nouveau_gem_pushbuf *req = data;
 530         struct drm_nouveau_gem_pushbuf_bo *bo = NULL;
 531         struct nouveau_channel *chan;
 532         struct validate_op op;
 533         struct nouveau_fence* fence = 0;
 534         uint32_t *pushbuf = NULL;
 535         int ret = 0, do_reloc = 0, i;
 536
 537         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 538         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
 539
 540         if (req->nr_dwords >= chan->dma.max ||
 541             req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS ||
 542             req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS) {
 543                 NV_ERROR(dev, "Pushbuf config exceeds limits:\n");
 544                 NV_ERROR(dev, "  dwords : %d max %d\n", req->nr_dwords,
 545                          chan->dma.max - 1);
 546                 NV_ERROR(dev, "  buffers: %d max %d\n", req->nr_buffers,
 547                          NOUVEAU_GEM_MAX_BUFFERS);
 548                 NV_ERROR(dev, "  relocs : %d max %d\n", req->nr_relocs,
 549                          NOUVEAU_GEM_MAX_RELOCS);
 550                 return -EINVAL;
 551         }
 552
 553         pushbuf = u_memcpya(req->dwords, req->nr_dwords, sizeof(uint32_t));
 554         if (IS_ERR(pushbuf))
 555                 return PTR_ERR(pushbuf);
 556
 557         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 558         if (IS_ERR(bo)) {
 559                 kfree(pushbuf);
 560                 return PTR_ERR(bo);
 561         }
 562
 563         mutex_lock(&dev->struct_mutex);
 564
 565         /* Validate buffer list */
 566         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 567                                            req->nr_buffers, &op, &do_reloc);
 568         if (ret)
 569                 goto out;
 570
 571         /* Apply any relocations that are required */
 572         if (do_reloc) {
 573                 ret = nouveau_gem_pushbuf_reloc_apply(chan, req->nr_buffers,
 574                                                       bo, req->nr_relocs,
 575                                                       req->relocs,
 576                                                       req->nr_dwords, 0,
 577                                                       pushbuf, false);
 578                 if (ret)
 579                         goto out;
 580         }
 581
 582         /* Emit push buffer to the hw
 583          */
 584         ret = RING_SPACE(chan, req->nr_dwords);
 585         if (ret)
 586                 goto out;
 587
 588         OUT_RINGp(chan, pushbuf, req->nr_dwords);
 589
 590         ret = nouveau_fence_new(chan, &fence, true);
 591         if (ret) {
 592                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 593                 WIND_RING(chan);
 594                 goto out;
 595         }
 596
 597         if (nouveau_gem_pushbuf_sync(chan)) {
 598                 ret = nouveau_fence_wait(fence, NULL, false, false);
 599                 if (ret) {
 600                         for (i = 0; i < req->nr_dwords; i++)
 601                                 NV_ERROR(dev, "0x%08x\n", pushbuf[i]);
 602                         NV_ERROR(dev, "^^ above push buffer is fail :(\n");
 603                 }
 604         }
 605
 606 out:
 607         validate_fini(&op, fence);
 608         nouveau_fence_unref((void**)&fence);
 609         mutex_unlock(&dev->struct_mutex);
 610         kfree(pushbuf);
 611         kfree(bo);
 612         return ret;
 613 }
 614
 615 #define PUSHBUF_CAL (dev_priv->card_type >= NV_20)
 616
 617 int
 618 nouveau_gem_ioctl_pushbuf_call(struct drm_device *dev, void *data,
 619                                struct drm_file *file_priv)
 620 {
 621         struct drm_nouveau_private *dev_priv = dev->dev_private;
 622         struct drm_nouveau_gem_pushbuf_call *req = data;
 623         struct drm_nouveau_gem_pushbuf_bo *bo = NULL;
 624         struct nouveau_channel *chan;
 625         struct drm_gem_object *gem;
 626         struct nouveau_bo *pbbo;
 627         struct validate_op op;
 628         struct nouveau_fence* fence = 0;
 629         int i, ret = 0, do_reloc = 0;
 630
 631         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 632         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
 633
 634         if (unlikely(req->handle == 0))
 635                 goto out_next;
 636
 637         if (req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS ||
 638             req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS) {
 639                 NV_ERROR(dev, "Pushbuf config exceeds limits:\n");
 640                 NV_ERROR(dev, "  buffers: %d max %d\n", req->nr_buffers,
 641                          NOUVEAU_GEM_MAX_BUFFERS);
 642                 NV_ERROR(dev, "  relocs : %d max %d\n", req->nr_relocs,
 643                          NOUVEAU_GEM_MAX_RELOCS);
 644                 return -EINVAL;
 645         }
 646
 647         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 648         if (IS_ERR(bo))
 649                 return PTR_ERR(bo);
 650
 651         mutex_lock(&dev->struct_mutex);
 652
 653         /* Validate buffer list */
 654         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 655                                            req->nr_buffers, &op, &do_reloc);
 656         if (ret) {
 657                 NV_ERROR(dev, "validate: %d\n", ret);
 658                 goto out;
 659         }
 660
 661         /* Validate DMA push buffer */
 662         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 663         if (!gem) {
 664                 NV_ERROR(dev, "Unknown pb handle 0x%08x\n", req->handle);
 665                 ret = -EINVAL;
 666                 goto out;
 667         }
 668         pbbo = nouveau_gem_object(gem);
 669
 670         if ((req->offset & 3) || req->nr_dwords < 2 ||
 671             (unsigned long)req->offset > (unsigned long)pbbo->bo.mem.size ||
 672             (unsigned long)req->nr_dwords >
 673              ((unsigned long)(pbbo->bo.mem.size - req->offset ) >> 2)) {
 674                 NV_ERROR(dev, "pb call misaligned or out of bounds: "
 675                               "%d + %d * 4 > %ld\n",
 676                          req->offset, req->nr_dwords, pbbo->bo.mem.size);
 677                 ret = -EINVAL;
 678                 drm_gem_object_unreference(gem);
 679                 goto out;
 680         }
 681
 682         ret = ttm_bo_reserve(&pbbo->bo, false, false, true,
 683                              chan->fence.sequence);
 684         if (ret) {
 685                 NV_ERROR(dev, "resv pb: %d\n", ret);
 686                 drm_gem_object_unreference(gem);
 687                 goto out;
 688         }
 689
 690         nouveau_bo_placement_set(pbbo, 1 << chan->pushbuf_bo->bo.mem.mem_type);
 691         ret = ttm_bo_validate(&pbbo->bo, &pbbo->placement, false, false);
 692         if (ret) {
 693                 NV_ERROR(dev, "validate pb: %d\n", ret);
 694                 ttm_bo_unreserve(&pbbo->bo);
 695                 drm_gem_object_unreference(gem);
 696                 goto out;
 697         }
 698
 699         list_add_tail(&pbbo->entry, &op.both_list);
 700
 701         /* If presumed return address doesn't match, we need to map the
 702          * push buffer and fix it..
 703          */
 704         if (!PUSHBUF_CAL) {
 705                 uint32_t retaddy;
 706
 707                 if (chan->dma.free < 4 + NOUVEAU_DMA_SKIPS) {
 708                         ret = nouveau_dma_wait(chan, 4 + NOUVEAU_DMA_SKIPS);
 709                         if (ret) {
 710                                 NV_ERROR(dev, "jmp_space: %d\n", ret);
 711                                 goto out;
 712                         }
 713                 }
 714
 715                 retaddy  = chan->pushbuf_base + ((chan->dma.cur + 2) << 2);
 716                 retaddy |= 0x20000000;
 717                 if (retaddy != req->suffix0) {
 718                         req->suffix0 = retaddy;
 719                         do_reloc = 1;
 720                 }
 721         }
 722
 723         /* Apply any relocations that are required */
 724         if (do_reloc) {
 725                 void *pbvirt;
 726                 bool is_iomem;
 727                 ret = ttm_bo_kmap(&pbbo->bo, 0, pbbo->bo.mem.num_pages,
 728                                   &pbbo->kmap);
 729                 if (ret) {
 730                         NV_ERROR(dev, "kmap pb: %d\n", ret);
 731                         goto out;
 732                 }
 733
 734                 pbvirt = ttm_kmap_obj_virtual(&pbbo->kmap, &is_iomem);
 735                 ret = nouveau_gem_pushbuf_reloc_apply(chan, req->nr_buffers, bo,
 736                                                       req->nr_relocs,
 737                                                       req->relocs,
 738                                                       req->nr_dwords,
 739                                                       req->offset / 4,
 740                                                       pbvirt, is_iomem);
 741
 742                 if (!PUSHBUF_CAL) {
 743                         nouveau_bo_wr32(pbbo,
 744                                         req->offset / 4 + req->nr_dwords - 2,
 745                                         req->suffix0);
 746                 }
 747
 748                 ttm_bo_kunmap(&pbbo->kmap);
 749                 if (ret) {
 750                         NV_ERROR(dev, "reloc apply: %d\n", ret);
 751                         goto out;
 752                 }
 753         }
 754
 755         if (PUSHBUF_CAL) {
 756                 ret = RING_SPACE(chan, 2);
 757                 if (ret) {
 758                         NV_ERROR(dev, "cal_space: %d\n", ret);
 759                         goto out;
 760                 }
 761                 OUT_RING(chan, ((pbbo->bo.mem.mm_node->start << PAGE_SHIFT) +
 762                                   req->offset) | 2);
 763                 OUT_RING(chan, 0);
 764         } else {
 765                 ret = RING_SPACE(chan, 2 + NOUVEAU_DMA_SKIPS);
 766                 if (ret) {
 767                         NV_ERROR(dev, "jmp_space: %d\n", ret);
 768                         goto out;
 769                 }
 770                 OUT_RING(chan, ((pbbo->bo.mem.mm_node->start << PAGE_SHIFT) +
 771                                   req->offset) | 0x20000000);
 772                 OUT_RING(chan, 0);
 773
 774                 /* Space the jumps apart with NOPs. */
 775                 for (i = 0; i < NOUVEAU_DMA_SKIPS; i++)
 776                         OUT_RING(chan, 0);
 777         }
 778
 779         ret = nouveau_fence_new(chan, &fence, true);
 780         if (ret) {
 781                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 782                 WIND_RING(chan);
 783                 goto out;
 784         }
 785
 786 out:
 787         validate_fini(&op, fence);
 788         nouveau_fence_unref((void**)&fence);
 789         mutex_unlock(&dev->struct_mutex);
 790         kfree(bo);
 791
 792 out_next:
 793         if (PUSHBUF_CAL) {
 794                 req->suffix0 = 0x00020000;
 795                 req->suffix1 = 0x00000000;
 796         } else {
 797                 req->suffix0 = 0x20000000 |
 798                               (chan->pushbuf_base + ((chan->dma.cur + 2) << 2));
 799                 req->suffix1 = 0x00000000;
 800         }
 801
 802         return ret;
 803 }
 804
 805 int
 806 nouveau_gem_ioctl_pushbuf_call2(struct drm_device *dev, void *data,
 807                                 struct drm_file *file_priv)
 808 {
 809         struct drm_nouveau_private *dev_priv = dev->dev_private;
 810         struct drm_nouveau_gem_pushbuf_call *req = data;
 811
 812         req->vram_available = dev_priv->fb_aper_free;
 813         req->gart_available = dev_priv->gart_info.aper_free;
 814
 815         return nouveau_gem_ioctl_pushbuf_call(dev, data, file_priv);
 816 }
 817
 818 static inline uint32_t
 819 domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
 820 {
 821         uint32_t flags = 0;
 822
 823         if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
 824                 flags |= TTM_PL_FLAG_VRAM;
 825         if (domain & NOUVEAU_GEM_DOMAIN_GART)
 826                 flags |= TTM_PL_FLAG_TT;
 827
 828         return flags;
 829 }
 830
 831 int
 832 nouveau_gem_ioctl_pin(struct drm_device *dev, void *data,
 833                       struct drm_file *file_priv)
 834 {
 835         struct drm_nouveau_gem_pin *req = data;
 836         struct drm_gem_object *gem;
 837         struct nouveau_bo *nvbo;
 838         int ret = 0;
 839
 840         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 841
 842         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 843                 NV_ERROR(dev, "pin only allowed without kernel modesetting\n");
 844                 return -EINVAL;
 845         }
 846
 847         if (!DRM_SUSER(DRM_CURPROC))
 848                 return -EPERM;
 849
 850         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 851         if (!gem)
 852                 return -EINVAL;
 853         nvbo = nouveau_gem_object(gem);
 854
 855         ret = nouveau_bo_pin(nvbo, domain_to_ttm(nvbo, req->domain));
 856         if (ret)
 857                 goto out;
 858
 859         req->offset = nvbo->bo.offset;
 860         if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 861                 req->domain = NOUVEAU_GEM_DOMAIN_GART;
 862         else
 863                 req->domain = NOUVEAU_GEM_DOMAIN_VRAM;
 864
 865 out:
 866         drm_gem_object_unreference_unlocked(gem);
 867
 868         return ret;
 869 }
 870
 871 int
 872 nouveau_gem_ioctl_unpin(struct drm_device *dev, void *data,
 873                         struct drm_file *file_priv)
 874 {
 875         struct drm_nouveau_gem_pin *req = data;
 876         struct drm_gem_object *gem;
 877         int ret;
 878
 879         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 880
 881         if (drm_core_check_feature(dev, DRIVER_MODESET))
 882                 return -EINVAL;
 883
 884         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 885         if (!gem)
 886                 return -EINVAL;
 887
 888         ret = nouveau_bo_unpin(nouveau_gem_object(gem));
 889
 890         drm_gem_object_unreference_unlocked(gem);
 891
 892         return ret;
 893 }
 894
 895 int
 896 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 897                            struct drm_file *file_priv)
 898 {
 899         struct drm_nouveau_gem_cpu_prep *req = data;
 900         struct drm_gem_object *gem;
 901         struct nouveau_bo *nvbo;
 902         bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
 903         int ret = -EINVAL;
 904
 905         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 906
 907         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 908         if (!gem)
 909                 return ret;
 910         nvbo = nouveau_gem_object(gem);
 911
 912         if (nvbo->cpu_filp) {
 913                 if (nvbo->cpu_filp == file_priv)
 914                         goto out;
 915
 916                 ret = ttm_bo_wait_cpu(&nvbo->bo, no_wait);
 917                 if (ret)
 918                         goto out;
 919         }
 920
 921         if (req->flags & NOUVEAU_GEM_CPU_PREP_NOBLOCK) {
 922                 spin_lock(&nvbo->bo.lock);
 923                 ret = ttm_bo_wait(&nvbo->bo, false, false, no_wait);
 924                 spin_unlock(&nvbo->bo.lock);
 925         } else {
 926                 ret = ttm_bo_synccpu_write_grab(&nvbo->bo, no_wait);
 927                 if (ret == 0)
 928                         nvbo->cpu_filp = file_priv;
 929         }
 930
 931 out:
 932         drm_gem_object_unreference_unlocked(gem);
 933         return ret;
 934 }
 935
 936 int
 937 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 938                            struct drm_file *file_priv)
 939 {
 940         struct drm_nouveau_gem_cpu_prep *req = data;
 941         struct drm_gem_object *gem;
 942         struct nouveau_bo *nvbo;
 943         int ret = -EINVAL;
 944
 945         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 946
 947         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 948         if (!gem)
 949                 return ret;
 950         nvbo = nouveau_gem_object(gem);
 951
 952         if (nvbo->cpu_filp != file_priv)
 953                 goto out;
 954         nvbo->cpu_filp = NULL;
 955
 956         ttm_bo_synccpu_write_release(&nvbo->bo);
 957         ret = 0;
 958
 959 out:
 960         drm_gem_object_unreference_unlocked(gem);
 961         return ret;
 962 }
 963
 964 int
 965 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 966                        struct drm_file *file_priv)
 967 {
 968         struct drm_nouveau_gem_info *req = data;
 969         struct drm_gem_object *gem;
 970         int ret;
 971
 972         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 973
 974         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 975         if (!gem)
 976                 return -EINVAL;
 977
 978         ret = nouveau_gem_info(gem, req);
 979         drm_gem_object_unreference_unlocked(gem);
 980         return ret;
 981 }
 982