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         mutex_lock(&dev->struct_mutex);
 171         drm_gem_object_handle_unreference(nvbo->gem);
 172         mutex_unlock(&dev->struct_mutex);
 173
 174         if (ret)
 175                 drm_gem_object_unreference(nvbo->gem);
 176         return ret;
 177 }
 178
 179 static int
 180 nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains,
 181                        uint32_t write_domains, uint32_t valid_domains)
 182 {
 183         struct nouveau_bo *nvbo = gem->driver_private;
 184         struct ttm_buffer_object *bo = &nvbo->bo;
 185         uint64_t flags;
 186
 187         if (!valid_domains || (!read_domains && !write_domains))
 188                 return -EINVAL;
 189
 190         if (write_domains) {
 191                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 192                     (write_domains & NOUVEAU_GEM_DOMAIN_VRAM))
 193                         flags = TTM_PL_FLAG_VRAM;
 194                 else
 195                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_GART) &&
 196                     (write_domains & NOUVEAU_GEM_DOMAIN_GART))
 197                         flags = TTM_PL_FLAG_TT;
 198                 else
 199                         return -EINVAL;
 200         } else {
 201                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 202                     (read_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 203                     bo->mem.mem_type == TTM_PL_VRAM)
 204                         flags = TTM_PL_FLAG_VRAM;
 205                 else
 206                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_GART) &&
 207                     (read_domains & NOUVEAU_GEM_DOMAIN_GART) &&
 208                     bo->mem.mem_type == TTM_PL_TT)
 209                         flags = TTM_PL_FLAG_TT;
 210                 else
 211                 if ((valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 212                     (read_domains & NOUVEAU_GEM_DOMAIN_VRAM))
 213                         flags = TTM_PL_FLAG_VRAM;
 214                 else
 215                         flags = TTM_PL_FLAG_TT;
 216         }
 217
 218         nouveau_bo_placement_set(nvbo, flags);
 219         return 0;
 220 }
 221
 222 struct validate_op {
 223         struct nouveau_fence *fence;
 224         struct list_head vram_list;
 225         struct list_head gart_list;
 226         struct list_head both_list;
 227 };
 228
 229 static void
 230 validate_fini_list(struct list_head *list, struct nouveau_fence *fence)
 231 {
 232         struct list_head *entry, *tmp;
 233         struct nouveau_bo *nvbo;
 234
 235         list_for_each_safe(entry, tmp, list) {
 236                 nvbo = list_entry(entry, struct nouveau_bo, entry);
 237                 if (likely(fence)) {
 238                         struct nouveau_fence *prev_fence;
 239
 240                         spin_lock(&nvbo->bo.lock);
 241                         prev_fence = nvbo->bo.sync_obj;
 242                         nvbo->bo.sync_obj = nouveau_fence_ref(fence);
 243                         spin_unlock(&nvbo->bo.lock);
 244                         nouveau_fence_unref((void *)&prev_fence);
 245                 }
 246
 247                 list_del(&nvbo->entry);
 248                 nvbo->reserved_by = NULL;
 249                 ttm_bo_unreserve(&nvbo->bo);
 250                 drm_gem_object_unreference(nvbo->gem);
 251         }
 252 }
 253
 254 static void
 255 validate_fini(struct validate_op *op, bool success)
 256 {
 257         struct nouveau_fence *fence = op->fence;
 258
 259         if (unlikely(!success))
 260                 op->fence = NULL;
 261
 262         validate_fini_list(&op->vram_list, op->fence);
 263         validate_fini_list(&op->gart_list, op->fence);
 264         validate_fini_list(&op->both_list, op->fence);
 265         nouveau_fence_unref((void *)&fence);
 266 }
 267
 268 static int
 269 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
 270               struct drm_nouveau_gem_pushbuf_bo *pbbo,
 271               int nr_buffers, struct validate_op *op)
 272 {
 273         struct drm_device *dev = chan->dev;
 274         struct drm_nouveau_private *dev_priv = dev->dev_private;
 275         uint32_t sequence;
 276         int trycnt = 0;
 277         int ret, i;
 278
 279         sequence = atomic_add_return(1, &dev_priv->ttm.validate_sequence);
 280 retry:
 281         if (++trycnt > 100000) {
 282                 NV_ERROR(dev, "%s failed and gave up.\n", __func__);
 283                 return -EINVAL;
 284         }
 285
 286         for (i = 0; i < nr_buffers; i++) {
 287                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
 288                 struct drm_gem_object *gem;
 289                 struct nouveau_bo *nvbo;
 290
 291                 gem = drm_gem_object_lookup(dev, file_priv, b->handle);
 292                 if (!gem) {
 293                         NV_ERROR(dev, "Unknown handle 0x%08x\n", b->handle);
 294                         validate_fini(op, NULL);
 295                         return -EINVAL;
 296                 }
 297                 nvbo = gem->driver_private;
 298
 299                 if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
 300                         NV_ERROR(dev, "multiple instances of buffer %d on "
 301                                       "validation list\n", b->handle);
 302                         validate_fini(op, NULL);
 303                         return -EINVAL;
 304                 }
 305
 306                 ret = ttm_bo_reserve(&nvbo->bo, false, false, true, sequence);
 307                 if (ret) {
 308                         validate_fini(op, NULL);
 309                         if (ret == -EAGAIN)
 310                                 ret = ttm_bo_wait_unreserved(&nvbo->bo, false);
 311                         drm_gem_object_unreference(gem);
 312                         if (ret)
 313                                 return ret;
 314                         goto retry;
 315                 }
 316
 317                 nvbo->reserved_by = file_priv;
 318                 nvbo->pbbo_index = i;
 319                 if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 320                     (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
 321                         list_add_tail(&nvbo->entry, &op->both_list);
 322                 else
 323                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 324                         list_add_tail(&nvbo->entry, &op->vram_list);
 325                 else
 326                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 327                         list_add_tail(&nvbo->entry, &op->gart_list);
 328                 else {
 329                         NV_ERROR(dev, "invalid valid domains: 0x%08x\n",
 330                                  b->valid_domains);
 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 == -ERESTART)
 346                                 ret = -EAGAIN;
 347                         if (ret)
 348                                 return ret;
 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 nouveau_bo *nvbo;
 363         int ret, relocs = 0;
 364
 365         list_for_each_entry(nvbo, list, entry) {
 366                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
 367                 struct nouveau_fence *prev_fence = nvbo->bo.sync_obj;
 368
 369                 if (prev_fence && nouveau_fence_channel(prev_fence) != chan) {
 370                         spin_lock(&nvbo->bo.lock);
 371                         ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 372                         spin_unlock(&nvbo->bo.lock);
 373                         if (unlikely(ret))
 374                                 return ret;
 375                 }
 376
 377                 ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
 378                                              b->write_domains,
 379                                              b->valid_domains);
 380                 if (unlikely(ret))
 381                         return ret;
 382
 383                 nvbo->channel = chan;
 384                 ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 385                                       false, false);
 386                 nvbo->channel = NULL;
 387                 if (unlikely(ret))
 388                         return ret;
 389
 390                 if (nvbo->bo.offset == b->presumed_offset &&
 391                     ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
 392                       b->presumed_domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
 393                      (nvbo->bo.mem.mem_type == TTM_PL_TT &&
 394                       b->presumed_domain & NOUVEAU_GEM_DOMAIN_GART)))
 395                         continue;
 396
 397                 if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 398                         b->presumed_domain = NOUVEAU_GEM_DOMAIN_GART;
 399                 else
 400                         b->presumed_domain = NOUVEAU_GEM_DOMAIN_VRAM;
 401                 b->presumed_offset = nvbo->bo.offset;
 402                 b->presumed_ok = 0;
 403                 relocs++;
 404
 405                 if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index], b, sizeof(*b)))
 406                         return -EFAULT;
 407         }
 408
 409         return relocs;
 410 }
 411
 412 static int
 413 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 414                              struct drm_file *file_priv,
 415                              struct drm_nouveau_gem_pushbuf_bo *pbbo,
 416                              uint64_t user_buffers, int nr_buffers,
 417                              struct validate_op *op, int *apply_relocs)
 418 {
 419         int ret, relocs = 0;
 420
 421         INIT_LIST_HEAD(&op->vram_list);
 422         INIT_LIST_HEAD(&op->gart_list);
 423         INIT_LIST_HEAD(&op->both_list);
 424
 425         ret = nouveau_fence_new(chan, &op->fence, false);
 426         if (ret)
 427                 return ret;
 428
 429         if (nr_buffers == 0)
 430                 return 0;
 431
 432         ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
 433         if (unlikely(ret))
 434                 return ret;
 435
 436         ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
 437         if (unlikely(ret < 0)) {
 438                 validate_fini(op, NULL);
 439                 return ret;
 440         }
 441         relocs += ret;
 442
 443         ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
 444         if (unlikely(ret < 0)) {
 445                 validate_fini(op, NULL);
 446                 return ret;
 447         }
 448         relocs += ret;
 449
 450         ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
 451         if (unlikely(ret < 0)) {
 452                 validate_fini(op, NULL);
 453                 return ret;
 454         }
 455         relocs += ret;
 456
 457         *apply_relocs = relocs;
 458         return 0;
 459 }
 460
 461 static inline void *
 462 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
 463 {
 464         void *mem;
 465         void __user *userptr = (void __force __user *)(uintptr_t)user;
 466
 467         mem = kmalloc(nmemb * size, GFP_KERNEL);
 468         if (!mem)
 469                 return ERR_PTR(-ENOMEM);
 470
 471         if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
 472                 kfree(mem);
 473                 return ERR_PTR(-EFAULT);
 474         }
 475
 476         return mem;
 477 }
 478
 479 static int
 480 nouveau_gem_pushbuf_reloc_apply(struct nouveau_channel *chan, int nr_bo,
 481                                 struct drm_nouveau_gem_pushbuf_bo *bo,
 482                                 int nr_relocs, uint64_t ptr_relocs,
 483                                 int nr_dwords, int first_dword,
 484                                 uint32_t *pushbuf, bool is_iomem)
 485 {
 486         struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
 487         struct drm_device *dev = chan->dev;
 488         int ret = 0, i;
 489
 490         reloc = u_memcpya(ptr_relocs, nr_relocs, sizeof(*reloc));
 491         if (IS_ERR(reloc))
 492                 return PTR_ERR(reloc);
 493
 494         for (i = 0; i < nr_relocs; i++) {
 495                 struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
 496                 struct drm_nouveau_gem_pushbuf_bo *b;
 497                 uint32_t data;
 498
 499                 if (r->bo_index >= nr_bo || r->reloc_index < first_dword ||
 500                     r->reloc_index >= first_dword + nr_dwords) {
 501                         NV_ERROR(dev, "Bad relocation %d\n", i);
 502                         NV_ERROR(dev, "  bo: %d max %d\n", r->bo_index, nr_bo);
 503                         NV_ERROR(dev, "  id: %d max %d\n", r->reloc_index, nr_dwords);
 504                         ret = -EINVAL;
 505                         break;
 506                 }
 507
 508                 b = &bo[r->bo_index];
 509                 if (b->presumed_ok)
 510                         continue;
 511
 512                 if (r->flags & NOUVEAU_GEM_RELOC_LOW)
 513                         data = b->presumed_offset + r->data;
 514                 else
 515                 if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
 516                         data = (b->presumed_offset + r->data) >> 32;
 517                 else
 518                         data = r->data;
 519
 520                 if (r->flags & NOUVEAU_GEM_RELOC_OR) {
 521                         if (b->presumed_domain == NOUVEAU_GEM_DOMAIN_GART)
 522                                 data |= r->tor;
 523                         else
 524                                 data |= r->vor;
 525                 }
 526
 527                 if (is_iomem)
 528                         iowrite32_native(data, (void __force __iomem *)
 529                                                 &pushbuf[r->reloc_index]);
 530                 else
 531                         pushbuf[r->reloc_index] = data;
 532         }
 533
 534         kfree(reloc);
 535         return ret;
 536 }
 537
 538 int
 539 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 540                           struct drm_file *file_priv)
 541 {
 542         struct drm_nouveau_gem_pushbuf *req = data;
 543         struct drm_nouveau_gem_pushbuf_bo *bo = NULL;
 544         struct nouveau_channel *chan;
 545         struct validate_op op;
 546         uint32_t *pushbuf = NULL;
 547         int ret = 0, do_reloc = 0, i;
 548
 549         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 550         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
 551
 552         if (req->nr_dwords >= chan->dma.max ||
 553             req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS ||
 554             req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS) {
 555                 NV_ERROR(dev, "Pushbuf config exceeds limits:\n");
 556                 NV_ERROR(dev, "  dwords : %d max %d\n", req->nr_dwords,
 557                          chan->dma.max - 1);
 558                 NV_ERROR(dev, "  buffers: %d max %d\n", req->nr_buffers,
 559                          NOUVEAU_GEM_MAX_BUFFERS);
 560                 NV_ERROR(dev, "  relocs : %d max %d\n", req->nr_relocs,
 561                          NOUVEAU_GEM_MAX_RELOCS);
 562                 return -EINVAL;
 563         }
 564
 565         pushbuf = u_memcpya(req->dwords, req->nr_dwords, sizeof(uint32_t));
 566         if (IS_ERR(pushbuf))
 567                 return PTR_ERR(pushbuf);
 568
 569         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 570         if (IS_ERR(bo)) {
 571                 kfree(pushbuf);
 572                 return PTR_ERR(bo);
 573         }
 574
 575         mutex_lock(&dev->struct_mutex);
 576
 577         /* Validate buffer list */
 578         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 579                                            req->nr_buffers, &op, &do_reloc);
 580         if (ret)
 581                 goto out;
 582
 583         /* Apply any relocations that are required */
 584         if (do_reloc) {
 585                 ret = nouveau_gem_pushbuf_reloc_apply(chan, req->nr_buffers,
 586                                                       bo, req->nr_relocs,
 587                                                       req->relocs,
 588                                                       req->nr_dwords, 0,
 589                                                       pushbuf, false);
 590                 if (ret)
 591                         goto out;
 592         }
 593
 594         /* Emit push buffer to the hw
 595          */
 596         ret = RING_SPACE(chan, req->nr_dwords);
 597         if (ret)
 598                 goto out;
 599
 600         OUT_RINGp(chan, pushbuf, req->nr_dwords);
 601
 602         ret = nouveau_fence_emit(op.fence);
 603         if (ret) {
 604                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 605                 WIND_RING(chan);
 606                 goto out;
 607         }
 608
 609         if (nouveau_gem_pushbuf_sync(chan)) {
 610                 ret = nouveau_fence_wait(op.fence, NULL, false, false);
 611                 if (ret) {
 612                         for (i = 0; i < req->nr_dwords; i++)
 613                                 NV_ERROR(dev, "0x%08x\n", pushbuf[i]);
 614                         NV_ERROR(dev, "^^ above push buffer is fail :(\n");
 615                 }
 616         }
 617
 618 out:
 619         validate_fini(&op, ret == 0);
 620         mutex_unlock(&dev->struct_mutex);
 621         kfree(pushbuf);
 622         kfree(bo);
 623         return ret;
 624 }
 625
 626 #define PUSHBUF_CAL (dev_priv->card_type >= NV_20)
 627
 628 int
 629 nouveau_gem_ioctl_pushbuf_call(struct drm_device *dev, void *data,
 630                                struct drm_file *file_priv)
 631 {
 632         struct drm_nouveau_private *dev_priv = dev->dev_private;
 633         struct drm_nouveau_gem_pushbuf_call *req = data;
 634         struct drm_nouveau_gem_pushbuf_bo *bo = NULL;
 635         struct nouveau_channel *chan;
 636         struct drm_gem_object *gem;
 637         struct nouveau_bo *pbbo;
 638         struct validate_op op;
 639         int i, ret = 0, do_reloc = 0;
 640
 641         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 642         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
 643
 644         if (unlikely(req->handle == 0))
 645                 goto out_next;
 646
 647         if (req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS ||
 648             req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS) {
 649                 NV_ERROR(dev, "Pushbuf config exceeds limits:\n");
 650                 NV_ERROR(dev, "  buffers: %d max %d\n", req->nr_buffers,
 651                          NOUVEAU_GEM_MAX_BUFFERS);
 652                 NV_ERROR(dev, "  relocs : %d max %d\n", req->nr_relocs,
 653                          NOUVEAU_GEM_MAX_RELOCS);
 654                 return -EINVAL;
 655         }
 656
 657         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 658         if (IS_ERR(bo))
 659                 return PTR_ERR(bo);
 660
 661         mutex_lock(&dev->struct_mutex);
 662
 663         /* Validate buffer list */
 664         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 665                                            req->nr_buffers, &op, &do_reloc);
 666         if (ret) {
 667                 NV_ERROR(dev, "validate: %d\n", ret);
 668                 goto out;
 669         }
 670
 671         /* Validate DMA push buffer */
 672         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 673         if (!gem) {
 674                 NV_ERROR(dev, "Unknown pb handle 0x%08x\n", req->handle);
 675                 ret = -EINVAL;
 676                 goto out;
 677         }
 678         pbbo = nouveau_gem_object(gem);
 679
 680         ret = ttm_bo_reserve(&pbbo->bo, false, false, true,
 681                              chan->fence.sequence);
 682         if (ret) {
 683                 NV_ERROR(dev, "resv pb: %d\n", ret);
 684                 drm_gem_object_unreference(gem);
 685                 goto out;
 686         }
 687
 688         nouveau_bo_placement_set(pbbo, 1 << chan->pushbuf_bo->bo.mem.mem_type);
 689         ret = ttm_bo_validate(&pbbo->bo, &pbbo->placement, false, false);
 690         if (ret) {
 691                 NV_ERROR(dev, "validate pb: %d\n", ret);
 692                 ttm_bo_unreserve(&pbbo->bo);
 693                 drm_gem_object_unreference(gem);
 694                 goto out;
 695         }
 696
 697         list_add_tail(&pbbo->entry, &op.both_list);
 698
 699         /* If presumed return address doesn't match, we need to map the
 700          * push buffer and fix it..
 701          */
 702         if (!PUSHBUF_CAL) {
 703                 uint32_t retaddy;
 704
 705                 if (chan->dma.free < 4 + NOUVEAU_DMA_SKIPS) {
 706                         ret = nouveau_dma_wait(chan, 4 + NOUVEAU_DMA_SKIPS);
 707                         if (ret) {
 708                                 NV_ERROR(dev, "jmp_space: %d\n", ret);
 709                                 goto out;
 710                         }
 711                 }
 712
 713                 retaddy  = chan->pushbuf_base + ((chan->dma.cur + 2) << 2);
 714                 retaddy |= 0x20000000;
 715                 if (retaddy != req->suffix0) {
 716                         req->suffix0 = retaddy;
 717                         do_reloc = 1;
 718                 }
 719         }
 720
 721         /* Apply any relocations that are required */
 722         if (do_reloc) {
 723                 void *pbvirt;
 724                 bool is_iomem;
 725                 ret = ttm_bo_kmap(&pbbo->bo, 0, pbbo->bo.mem.num_pages,
 726                                   &pbbo->kmap);
 727                 if (ret) {
 728                         NV_ERROR(dev, "kmap pb: %d\n", ret);
 729                         goto out;
 730                 }
 731
 732                 pbvirt = ttm_kmap_obj_virtual(&pbbo->kmap, &is_iomem);
 733                 ret = nouveau_gem_pushbuf_reloc_apply(chan, req->nr_buffers, bo,
 734                                                       req->nr_relocs,
 735                                                       req->relocs,
 736                                                       req->nr_dwords,
 737                                                       req->offset / 4,
 738                                                       pbvirt, is_iomem);
 739
 740                 if (!PUSHBUF_CAL) {
 741                         nouveau_bo_wr32(pbbo,
 742                                         req->offset / 4 + req->nr_dwords - 2,
 743                                         req->suffix0);
 744                 }
 745
 746                 ttm_bo_kunmap(&pbbo->kmap);
 747                 if (ret) {
 748                         NV_ERROR(dev, "reloc apply: %d\n", ret);
 749                         goto out;
 750                 }
 751         }
 752
 753         if (PUSHBUF_CAL) {
 754                 ret = RING_SPACE(chan, 2);
 755                 if (ret) {
 756                         NV_ERROR(dev, "cal_space: %d\n", ret);
 757                         goto out;
 758                 }
 759                 OUT_RING(chan, ((pbbo->bo.mem.mm_node->start << PAGE_SHIFT) +
 760                                   req->offset) | 2);
 761                 OUT_RING(chan, 0);
 762         } else {
 763                 ret = RING_SPACE(chan, 2 + NOUVEAU_DMA_SKIPS);
 764                 if (ret) {
 765                         NV_ERROR(dev, "jmp_space: %d\n", ret);
 766                         goto out;
 767                 }
 768                 OUT_RING(chan, ((pbbo->bo.mem.mm_node->start << PAGE_SHIFT) +
 769                                   req->offset) | 0x20000000);
 770                 OUT_RING(chan, 0);
 771
 772                 /* Space the jumps apart with NOPs. */
 773                 for (i = 0; i < NOUVEAU_DMA_SKIPS; i++)
 774                         OUT_RING(chan, 0);
 775         }
 776
 777         ret = nouveau_fence_emit(op.fence);
 778         if (ret) {
 779                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 780                 WIND_RING(chan);
 781                 goto out;
 782         }
 783
 784 out:
 785         validate_fini(&op, ret == 0);
 786         mutex_unlock(&dev->struct_mutex);
 787         kfree(bo);
 788
 789 out_next:
 790         if (PUSHBUF_CAL) {
 791                 req->suffix0 = 0x00020000;
 792                 req->suffix1 = 0x00000000;
 793         } else {
 794                 req->suffix0 = 0x20000000 |
 795                               (chan->pushbuf_base + ((chan->dma.cur + 2) << 2));
 796                 req->suffix1 = 0x00000000;
 797         }
 798
 799         return ret;
 800 }
 801
 802 int
 803 nouveau_gem_ioctl_pushbuf_call2(struct drm_device *dev, void *data,
 804                                 struct drm_file *file_priv)
 805 {
 806         struct drm_nouveau_private *dev_priv = dev->dev_private;
 807         struct drm_nouveau_gem_pushbuf_call *req = data;
 808
 809         req->vram_available = dev_priv->fb_aper_free;
 810         req->gart_available = dev_priv->gart_info.aper_free;
 811
 812         return nouveau_gem_ioctl_pushbuf_call(dev, data, file_priv);
 813 }
 814
 815 static inline uint32_t
 816 domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
 817 {
 818         uint32_t flags = 0;
 819
 820         if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
 821                 flags |= TTM_PL_FLAG_VRAM;
 822         if (domain & NOUVEAU_GEM_DOMAIN_GART)
 823                 flags |= TTM_PL_FLAG_TT;
 824
 825         return flags;
 826 }
 827
 828 int
 829 nouveau_gem_ioctl_pin(struct drm_device *dev, void *data,
 830                       struct drm_file *file_priv)
 831 {
 832         struct drm_nouveau_gem_pin *req = data;
 833         struct drm_gem_object *gem;
 834         struct nouveau_bo *nvbo;
 835         int ret = 0;
 836
 837         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 838
 839         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 840                 NV_ERROR(dev, "pin only allowed without kernel modesetting\n");
 841                 return -EINVAL;
 842         }
 843
 844         if (!DRM_SUSER(DRM_CURPROC))
 845                 return -EPERM;
 846
 847         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 848         if (!gem)
 849                 return -EINVAL;
 850         nvbo = nouveau_gem_object(gem);
 851
 852         ret = nouveau_bo_pin(nvbo, domain_to_ttm(nvbo, req->domain));
 853         if (ret)
 854                 goto out;
 855
 856         req->offset = nvbo->bo.offset;
 857         if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 858                 req->domain = NOUVEAU_GEM_DOMAIN_GART;
 859         else
 860                 req->domain = NOUVEAU_GEM_DOMAIN_VRAM;
 861
 862 out:
 863         mutex_lock(&dev->struct_mutex);
 864         drm_gem_object_unreference(gem);
 865         mutex_unlock(&dev->struct_mutex);
 866
 867         return ret;
 868 }
 869
 870 int
 871 nouveau_gem_ioctl_unpin(struct drm_device *dev, void *data,
 872                         struct drm_file *file_priv)
 873 {
 874         struct drm_nouveau_gem_pin *req = data;
 875         struct drm_gem_object *gem;
 876         int ret;
 877
 878         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 879
 880         if (drm_core_check_feature(dev, DRIVER_MODESET))
 881                 return -EINVAL;
 882
 883         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 884         if (!gem)
 885                 return -EINVAL;
 886
 887         ret = nouveau_bo_unpin(nouveau_gem_object(gem));
 888
 889         mutex_lock(&dev->struct_mutex);
 890         drm_gem_object_unreference(gem);
 891         mutex_unlock(&dev->struct_mutex);
 892
 893         return ret;
 894 }
 895
 896 int
 897 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 898                            struct drm_file *file_priv)
 899 {
 900         struct drm_nouveau_gem_cpu_prep *req = data;
 901         struct drm_gem_object *gem;
 902         struct nouveau_bo *nvbo;
 903         bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
 904         int ret = -EINVAL;
 905
 906         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 907
 908         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 909         if (!gem)
 910                 return ret;
 911         nvbo = nouveau_gem_object(gem);
 912
 913         if (nvbo->cpu_filp) {
 914                 if (nvbo->cpu_filp == file_priv)
 915                         goto out;
 916
 917                 ret = ttm_bo_wait_cpu(&nvbo->bo, no_wait);
 918                 if (ret == -ERESTART)
 919                         ret = -EAGAIN;
 920                 if (ret)
 921                         goto out;
 922         }
 923
 924         if (req->flags & NOUVEAU_GEM_CPU_PREP_NOBLOCK) {
 925                 ret = ttm_bo_wait(&nvbo->bo, false, false, no_wait);
 926         } else {
 927                 ret = ttm_bo_synccpu_write_grab(&nvbo->bo, no_wait);
 928                 if (ret == -ERESTART)
 929                         ret = -EAGAIN;
 930                 else
 931                 if (ret == 0)
 932                         nvbo->cpu_filp = file_priv;
 933         }
 934
 935 out:
 936         mutex_lock(&dev->struct_mutex);
 937         drm_gem_object_unreference(gem);
 938         mutex_unlock(&dev->struct_mutex);
 939         return ret;
 940 }
 941
 942 int
 943 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 944                            struct drm_file *file_priv)
 945 {
 946         struct drm_nouveau_gem_cpu_prep *req = data;
 947         struct drm_gem_object *gem;
 948         struct nouveau_bo *nvbo;
 949         int ret = -EINVAL;
 950
 951         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 952
 953         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 954         if (!gem)
 955                 return ret;
 956         nvbo = nouveau_gem_object(gem);
 957
 958         if (nvbo->cpu_filp != file_priv)
 959                 goto out;
 960         nvbo->cpu_filp = NULL;
 961
 962         ttm_bo_synccpu_write_release(&nvbo->bo);
 963         ret = 0;
 964
 965 out:
 966         mutex_lock(&dev->struct_mutex);
 967         drm_gem_object_unreference(gem);
 968         mutex_unlock(&dev->struct_mutex);
 969         return ret;
 970 }
 971
 972 int
 973 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 974                        struct drm_file *file_priv)
 975 {
 976         struct drm_nouveau_gem_info *req = data;
 977         struct drm_gem_object *gem;
 978         int ret;
 979
 980         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
 981
 982         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 983         if (!gem)
 984                 return -EINVAL;
 985
 986         ret = nouveau_gem_info(gem, req);
 987         mutex_lock(&dev->struct_mutex);
 988         drm_gem_object_unreference(gem);
 989         mutex_unlock(&dev->struct_mutex);
 990         return ret;
 991 }
 992