drivers/gpu/drm/nouveau/nouveau_object.c

   1 /*
   2  * Copyright (C) 2006 Ben Skeggs.
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 /*
  29  * Authors:
  30  *   Ben Skeggs <darktama@iinet.net.au>
  31  */
  32
  33 #include "drmP.h"
  34 #include "drm.h"
  35 #include "nouveau_drv.h"
  36 #include "nouveau_drm.h"
  37
  38 /* NVidia uses context objects to drive drawing operations.
  39
  40    Context objects can be selected into 8 subchannels in the FIFO,
  41    and then used via DMA command buffers.
  42
  43    A context object is referenced by a user defined handle (CARD32). The HW
  44    looks up graphics objects in a hash table in the instance RAM.
  45
  46    An entry in the hash table consists of 2 CARD32. The first CARD32 contains
  47    the handle, the second one a bitfield, that contains the address of the
  48    object in instance RAM.
  49
  50    The format of the second CARD32 seems to be:
  51
  52    NV4 to NV30:
  53
  54    15: 0  instance_addr >> 4
  55    17:16  engine (here uses 1 = graphics)
  56    28:24  channel id (here uses 0)
  57    31     valid (use 1)
  58
  59    NV40:
  60
  61    15: 0  instance_addr >> 4   (maybe 19-0)
  62    21:20  engine (here uses 1 = graphics)
  63    I'm unsure about the other bits, but using 0 seems to work.
  64
  65    The key into the hash table depends on the object handle and channel id and
  66    is given as:
  67 */
  68 static uint32_t
  69 nouveau_ramht_hash_handle(struct drm_device *dev, int channel, uint32_t handle)
  70 {
  71         struct drm_nouveau_private *dev_priv = dev->dev_private;
  72         uint32_t hash = 0;
  73         int i;
  74
  75         NV_DEBUG(dev, "ch%d handle=0x%08x\n", channel, handle);
  76
  77         for (i = 32; i > 0; i -= dev_priv->ramht_bits) {
  78                 hash ^= (handle & ((1 << dev_priv->ramht_bits) - 1));
  79                 handle >>= dev_priv->ramht_bits;
  80         }
  81
  82         if (dev_priv->card_type < NV_50)
  83                 hash ^= channel << (dev_priv->ramht_bits - 4);
  84         hash <<= 3;
  85
  86         NV_DEBUG(dev, "hash=0x%08x\n", hash);
  87         return hash;
  88 }
  89
  90 static int
  91 nouveau_ramht_entry_valid(struct drm_device *dev, struct nouveau_gpuobj *ramht,
  92                           uint32_t offset)
  93 {
  94         struct drm_nouveau_private *dev_priv = dev->dev_private;
  95         uint32_t ctx = nv_ro32(dev, ramht, (offset + 4)/4);
  96
  97         if (dev_priv->card_type < NV_40)
  98                 return ((ctx & NV_RAMHT_CONTEXT_VALID) != 0);
  99         return (ctx != 0);
 100 }
 101
 102 static int
 103 nouveau_ramht_insert(struct drm_device *dev, struct nouveau_gpuobj_ref *ref)
 104 {
 105         struct drm_nouveau_private *dev_priv = dev->dev_private;
 106         struct nouveau_instmem_engine *instmem = &dev_priv->engine.instmem;
 107         struct nouveau_channel *chan = ref->channel;
 108         struct nouveau_gpuobj *ramht = chan->ramht ? chan->ramht->gpuobj : NULL;
 109         uint32_t ctx, co, ho;
 110
 111         if (!ramht) {
 112                 NV_ERROR(dev, "No hash table!\n");
 113                 return -EINVAL;
 114         }
 115
 116         if (dev_priv->card_type < NV_40) {
 117                 ctx = NV_RAMHT_CONTEXT_VALID | (ref->instance >> 4) |
 118                       (chan->id << NV_RAMHT_CONTEXT_CHANNEL_SHIFT) |
 119                       (ref->gpuobj->engine << NV_RAMHT_CONTEXT_ENGINE_SHIFT);
 120         } else
 121         if (dev_priv->card_type < NV_50) {
 122                 ctx = (ref->instance >> 4) |
 123                       (chan->id << NV40_RAMHT_CONTEXT_CHANNEL_SHIFT) |
 124                       (ref->gpuobj->engine << NV40_RAMHT_CONTEXT_ENGINE_SHIFT);
 125         } else {
 126                 if (ref->gpuobj->engine == NVOBJ_ENGINE_DISPLAY) {
 127                         ctx = (ref->instance << 10) | 2;
 128                 } else {
 129                         ctx = (ref->instance >> 4) |
 130                               ((ref->gpuobj->engine <<
 131                                 NV40_RAMHT_CONTEXT_ENGINE_SHIFT));
 132                 }
 133         }
 134
 135         instmem->prepare_access(dev, true);
 136         co = ho = nouveau_ramht_hash_handle(dev, chan->id, ref->handle);
 137         do {
 138                 if (!nouveau_ramht_entry_valid(dev, ramht, co)) {
 139                         NV_DEBUG(dev,
 140                                  "insert ch%d 0x%08x: h=0x%08x, c=0x%08x\n",
 141                                  chan->id, co, ref->handle, ctx);
 142                         nv_wo32(dev, ramht, (co + 0)/4, ref->handle);
 143                         nv_wo32(dev, ramht, (co + 4)/4, ctx);
 144
 145                         list_add_tail(&ref->list, &chan->ramht_refs);
 146                         instmem->finish_access(dev);
 147                         return 0;
 148                 }
 149                 NV_DEBUG(dev, "collision ch%d 0x%08x: h=0x%08x\n",
 150                          chan->id, co, nv_ro32(dev, ramht, co/4));
 151
 152                 co += 8;
 153                 if (co >= dev_priv->ramht_size)
 154                         co = 0;
 155         } while (co != ho);
 156         instmem->finish_access(dev);
 157
 158         NV_ERROR(dev, "RAMHT space exhausted. ch=%d\n", chan->id);
 159         return -ENOMEM;
 160 }
 161
 162 static void
 163 nouveau_ramht_remove(struct drm_device *dev, struct nouveau_gpuobj_ref *ref)
 164 {
 165         struct drm_nouveau_private *dev_priv = dev->dev_private;
 166         struct nouveau_instmem_engine *instmem = &dev_priv->engine.instmem;
 167         struct nouveau_channel *chan = ref->channel;
 168         struct nouveau_gpuobj *ramht = chan->ramht ? chan->ramht->gpuobj : NULL;
 169         uint32_t co, ho;
 170
 171         if (!ramht) {
 172                 NV_ERROR(dev, "No hash table!\n");
 173                 return;
 174         }
 175
 176         instmem->prepare_access(dev, true);
 177         co = ho = nouveau_ramht_hash_handle(dev, chan->id, ref->handle);
 178         do {
 179                 if (nouveau_ramht_entry_valid(dev, ramht, co) &&
 180                     (ref->handle == nv_ro32(dev, ramht, (co/4)))) {
 181                         NV_DEBUG(dev,
 182                                  "remove ch%d 0x%08x: h=0x%08x, c=0x%08x\n",
 183                                  chan->id, co, ref->handle,
 184                                  nv_ro32(dev, ramht, (co + 4)));
 185                         nv_wo32(dev, ramht, (co + 0)/4, 0x00000000);
 186                         nv_wo32(dev, ramht, (co + 4)/4, 0x00000000);
 187
 188                         list_del(&ref->list);
 189                         instmem->finish_access(dev);
 190                         return;
 191                 }
 192
 193                 co += 8;
 194                 if (co >= dev_priv->ramht_size)
 195                         co = 0;
 196         } while (co != ho);
 197         list_del(&ref->list);
 198         instmem->finish_access(dev);
 199
 200         NV_ERROR(dev, "RAMHT entry not found. ch=%d, handle=0x%08x\n",
 201                  chan->id, ref->handle);
 202 }
 203
 204 int
 205 nouveau_gpuobj_new(struct drm_device *dev, struct nouveau_channel *chan,
 206                    uint32_t size, int align, uint32_t flags,
 207                    struct nouveau_gpuobj **gpuobj_ret)
 208 {
 209         struct drm_nouveau_private *dev_priv = dev->dev_private;
 210         struct nouveau_engine *engine = &dev_priv->engine;
 211         struct nouveau_gpuobj *gpuobj;
 212         struct mem_block *pramin = NULL;
 213         int ret;
 214
 215         NV_DEBUG(dev, "ch%d size=%u align=%d flags=0x%08x\n",
 216                  chan ? chan->id : -1, size, align, flags);
 217
 218         if (!dev_priv || !gpuobj_ret || *gpuobj_ret != NULL)
 219                 return -EINVAL;
 220
 221         gpuobj = kzalloc(sizeof(*gpuobj), GFP_KERNEL);
 222         if (!gpuobj)
 223                 return -ENOMEM;
 224         NV_DEBUG(dev, "gpuobj %p\n", gpuobj);
 225         gpuobj->flags = flags;
 226         gpuobj->im_channel = chan;
 227
 228         list_add_tail(&gpuobj->list, &dev_priv->gpuobj_list);
 229
 230         /* Choose between global instmem heap, and per-channel private
 231          * instmem heap.  On <NV50 allow requests for private instmem
 232          * to be satisfied from global heap if no per-channel area
 233          * available.
 234          */
 235         if (chan) {
 236                 if (chan->ramin_heap) {
 237                         NV_DEBUG(dev, "private heap\n");
 238                         pramin = chan->ramin_heap;
 239                 } else
 240                 if (dev_priv->card_type < NV_50) {
 241                         NV_DEBUG(dev, "global heap fallback\n");
 242                         pramin = dev_priv->ramin_heap;
 243                 }
 244         } else {
 245                 NV_DEBUG(dev, "global heap\n");
 246                 pramin = dev_priv->ramin_heap;
 247         }
 248
 249         if (!pramin) {
 250                 NV_ERROR(dev, "No PRAMIN heap!\n");
 251                 return -EINVAL;
 252         }
 253
 254         if (!chan) {
 255                 ret = engine->instmem.populate(dev, gpuobj, &size);
 256                 if (ret) {
 257                         nouveau_gpuobj_del(dev, &gpuobj);
 258                         return ret;
 259                 }
 260         }
 261
 262         /* Allocate a chunk of the PRAMIN aperture */
 263         gpuobj->im_pramin = nouveau_mem_alloc_block(pramin, size,
 264                                                     drm_order(align),
 265                                                     (struct drm_file *)-2, 0);
 266         if (!gpuobj->im_pramin) {
 267                 nouveau_gpuobj_del(dev, &gpuobj);
 268                 return -ENOMEM;
 269         }
 270
 271         if (!chan) {
 272                 ret = engine->instmem.bind(dev, gpuobj);
 273                 if (ret) {
 274                         nouveau_gpuobj_del(dev, &gpuobj);
 275                         return ret;
 276                 }
 277         }
 278
 279         if (gpuobj->flags & NVOBJ_FLAG_ZERO_ALLOC) {
 280                 int i;
 281
 282                 engine->instmem.prepare_access(dev, true);
 283                 for (i = 0; i < gpuobj->im_pramin->size; i += 4)
 284                         nv_wo32(dev, gpuobj, i/4, 0);
 285                 engine->instmem.finish_access(dev);
 286         }
 287
 288         *gpuobj_ret = gpuobj;
 289         return 0;
 290 }
 291
 292 int
 293 nouveau_gpuobj_early_init(struct drm_device *dev)
 294 {
 295         struct drm_nouveau_private *dev_priv = dev->dev_private;
 296
 297         NV_DEBUG(dev, "\n");
 298
 299         INIT_LIST_HEAD(&dev_priv->gpuobj_list);
 300
 301         return 0;
 302 }
 303
 304 int
 305 nouveau_gpuobj_init(struct drm_device *dev)
 306 {
 307         struct drm_nouveau_private *dev_priv = dev->dev_private;
 308         int ret;
 309
 310         NV_DEBUG(dev, "\n");
 311
 312         if (dev_priv->card_type < NV_50) {
 313                 ret = nouveau_gpuobj_new_fake(dev,
 314                         dev_priv->ramht_offset, ~0, dev_priv->ramht_size,
 315                         NVOBJ_FLAG_ZERO_ALLOC | NVOBJ_FLAG_ALLOW_NO_REFS,
 316                                                 &dev_priv->ramht, NULL);
 317                 if (ret)
 318                         return ret;
 319         }
 320
 321         return 0;
 322 }
 323
 324 void
 325 nouveau_gpuobj_takedown(struct drm_device *dev)
 326 {
 327         struct drm_nouveau_private *dev_priv = dev->dev_private;
 328
 329         NV_DEBUG(dev, "\n");
 330
 331         nouveau_gpuobj_del(dev, &dev_priv->ramht);
 332 }
 333
 334 void
 335 nouveau_gpuobj_late_takedown(struct drm_device *dev)
 336 {
 337         struct drm_nouveau_private *dev_priv = dev->dev_private;
 338         struct nouveau_gpuobj *gpuobj = NULL;
 339         struct list_head *entry, *tmp;
 340
 341         NV_DEBUG(dev, "\n");
 342
 343         list_for_each_safe(entry, tmp, &dev_priv->gpuobj_list) {
 344                 gpuobj = list_entry(entry, struct nouveau_gpuobj, list);
 345
 346                 NV_ERROR(dev, "gpuobj %p still exists at takedown, refs=%d\n",
 347                          gpuobj, gpuobj->refcount);
 348                 gpuobj->refcount = 0;
 349                 nouveau_gpuobj_del(dev, &gpuobj);
 350         }
 351 }
 352
 353 int
 354 nouveau_gpuobj_del(struct drm_device *dev, struct nouveau_gpuobj **pgpuobj)
 355 {
 356         struct drm_nouveau_private *dev_priv = dev->dev_private;
 357         struct nouveau_engine *engine = &dev_priv->engine;
 358         struct nouveau_gpuobj *gpuobj;
 359         int i;
 360
 361         NV_DEBUG(dev, "gpuobj %p\n", pgpuobj ? *pgpuobj : NULL);
 362
 363         if (!dev_priv || !pgpuobj || !(*pgpuobj))
 364                 return -EINVAL;
 365         gpuobj = *pgpuobj;
 366
 367         if (gpuobj->refcount != 0) {
 368                 NV_ERROR(dev, "gpuobj refcount is %d\n", gpuobj->refcount);
 369                 return -EINVAL;
 370         }
 371
 372         if (gpuobj->im_pramin && (gpuobj->flags & NVOBJ_FLAG_ZERO_FREE)) {
 373                 engine->instmem.prepare_access(dev, true);
 374                 for (i = 0; i < gpuobj->im_pramin->size; i += 4)
 375                         nv_wo32(dev, gpuobj, i/4, 0);
 376                 engine->instmem.finish_access(dev);
 377         }
 378
 379         if (gpuobj->dtor)
 380                 gpuobj->dtor(dev, gpuobj);
 381
 382         if (gpuobj->im_backing && !(gpuobj->flags & NVOBJ_FLAG_FAKE))
 383                 engine->instmem.clear(dev, gpuobj);
 384
 385         if (gpuobj->im_pramin) {
 386                 if (gpuobj->flags & NVOBJ_FLAG_FAKE)
 387                         kfree(gpuobj->im_pramin);
 388                 else
 389                         nouveau_mem_free_block(gpuobj->im_pramin);
 390         }
 391
 392         list_del(&gpuobj->list);
 393
 394         *pgpuobj = NULL;
 395         kfree(gpuobj);
 396         return 0;
 397 }
 398
 399 static int
 400 nouveau_gpuobj_instance_get(struct drm_device *dev,
 401                             struct nouveau_channel *chan,
 402                             struct nouveau_gpuobj *gpuobj, uint32_t *inst)
 403 {
 404         struct drm_nouveau_private *dev_priv = dev->dev_private;
 405         struct nouveau_gpuobj *cpramin;
 406
 407         /* <NV50 use PRAMIN address everywhere */
 408         if (dev_priv->card_type < NV_50) {
 409                 *inst = gpuobj->im_pramin->start;
 410                 return 0;
 411         }
 412
 413         if (chan && gpuobj->im_channel != chan) {
 414                 NV_ERROR(dev, "Channel mismatch: obj %d, ref %d\n",
 415                          gpuobj->im_channel->id, chan->id);
 416                 return -EINVAL;
 417         }
 418
 419         /* NV50 channel-local instance */
 420         if (chan) {
 421                 cpramin = chan->ramin->gpuobj;
 422                 *inst = gpuobj->im_pramin->start - cpramin->im_pramin->start;
 423                 return 0;
 424         }
 425
 426         /* NV50 global (VRAM) instance */
 427         if (!gpuobj->im_channel) {
 428                 /* ...from global heap */
 429                 if (!gpuobj->im_backing) {
 430                         NV_ERROR(dev, "AII, no VRAM backing gpuobj\n");
 431                         return -EINVAL;
 432                 }
 433                 *inst = gpuobj->im_backing_start;
 434                 return 0;
 435         } else {
 436                 /* ...from local heap */
 437                 cpramin = gpuobj->im_channel->ramin->gpuobj;
 438                 *inst = cpramin->im_backing_start +
 439                         (gpuobj->im_pramin->start - cpramin->im_pramin->start);
 440                 return 0;
 441         }
 442
 443         return -EINVAL;
 444 }
 445
 446 int
 447 nouveau_gpuobj_ref_add(struct drm_device *dev, struct nouveau_channel *chan,
 448                        uint32_t handle, struct nouveau_gpuobj *gpuobj,
 449                        struct nouveau_gpuobj_ref **ref_ret)
 450 {
 451         struct drm_nouveau_private *dev_priv = dev->dev_private;
 452         struct nouveau_gpuobj_ref *ref;
 453         uint32_t instance;
 454         int ret;
 455
 456         NV_DEBUG(dev, "ch%d h=0x%08x gpuobj=%p\n",
 457                  chan ? chan->id : -1, handle, gpuobj);
 458
 459         if (!dev_priv || !gpuobj || (ref_ret && *ref_ret != NULL))
 460                 return -EINVAL;
 461
 462         if (!chan && !ref_ret)
 463                 return -EINVAL;
 464
 465         if (gpuobj->engine == NVOBJ_ENGINE_SW && !gpuobj->im_pramin) {
 466                 /* sw object */
 467                 instance = 0x40;
 468         } else {
 469                 ret = nouveau_gpuobj_instance_get(dev, chan, gpuobj, &instance);
 470                 if (ret)
 471                         return ret;
 472         }
 473
 474         ref = kzalloc(sizeof(*ref), GFP_KERNEL);
 475         if (!ref)
 476                 return -ENOMEM;
 477         INIT_LIST_HEAD(&ref->list);
 478         ref->gpuobj   = gpuobj;
 479         ref->channel  = chan;
 480         ref->instance = instance;
 481
 482         if (!ref_ret) {
 483                 ref->handle = handle;
 484
 485                 ret = nouveau_ramht_insert(dev, ref);
 486                 if (ret) {
 487                         kfree(ref);
 488                         return ret;
 489                 }
 490         } else {
 491                 ref->handle = ~0;
 492                 *ref_ret = ref;
 493         }
 494
 495         ref->gpuobj->refcount++;
 496         return 0;
 497 }
 498
 499 int nouveau_gpuobj_ref_del(struct drm_device *dev, struct nouveau_gpuobj_ref **pref)
 500 {
 501         struct nouveau_gpuobj_ref *ref;
 502
 503         NV_DEBUG(dev, "ref %p\n", pref ? *pref : NULL);
 504
 505         if (!dev || !pref || *pref == NULL)
 506                 return -EINVAL;
 507         ref = *pref;
 508
 509         if (ref->handle != ~0)
 510                 nouveau_ramht_remove(dev, ref);
 511
 512         if (ref->gpuobj) {
 513                 ref->gpuobj->refcount--;
 514
 515                 if (ref->gpuobj->refcount == 0) {
 516                         if (!(ref->gpuobj->flags & NVOBJ_FLAG_ALLOW_NO_REFS))
 517                                 nouveau_gpuobj_del(dev, &ref->gpuobj);
 518                 }
 519         }
 520
 521         *pref = NULL;
 522         kfree(ref);
 523         return 0;
 524 }
 525
 526 int
 527 nouveau_gpuobj_new_ref(struct drm_device *dev,
 528                        struct nouveau_channel *oc, struct nouveau_channel *rc,
 529                        uint32_t handle, uint32_t size, int align,
 530                        uint32_t flags, struct nouveau_gpuobj_ref **ref)
 531 {
 532         struct nouveau_gpuobj *gpuobj = NULL;
 533         int ret;
 534
 535         ret = nouveau_gpuobj_new(dev, oc, size, align, flags, &gpuobj);
 536         if (ret)
 537                 return ret;
 538
 539         ret = nouveau_gpuobj_ref_add(dev, rc, handle, gpuobj, ref);
 540         if (ret) {
 541                 nouveau_gpuobj_del(dev, &gpuobj);
 542                 return ret;
 543         }
 544
 545         return 0;
 546 }
 547
 548 int
 549 nouveau_gpuobj_ref_find(struct nouveau_channel *chan, uint32_t handle,
 550                         struct nouveau_gpuobj_ref **ref_ret)
 551 {
 552         struct nouveau_gpuobj_ref *ref;
 553         struct list_head *entry, *tmp;
 554
 555         list_for_each_safe(entry, tmp, &chan->ramht_refs) {
 556                 ref = list_entry(entry, struct nouveau_gpuobj_ref, list);
 557
 558                 if (ref->handle == handle) {
 559                         if (ref_ret)
 560                                 *ref_ret = ref;
 561                         return 0;
 562                 }
 563         }
 564
 565         return -EINVAL;
 566 }
 567
 568 int
 569 nouveau_gpuobj_new_fake(struct drm_device *dev, uint32_t p_offset,
 570                         uint32_t b_offset, uint32_t size,
 571                         uint32_t flags, struct nouveau_gpuobj **pgpuobj,
 572                         struct nouveau_gpuobj_ref **pref)
 573 {
 574         struct drm_nouveau_private *dev_priv = dev->dev_private;
 575         struct nouveau_gpuobj *gpuobj = NULL;
 576         int i;
 577
 578         NV_DEBUG(dev,
 579                  "p_offset=0x%08x b_offset=0x%08x size=0x%08x flags=0x%08x\n",
 580                  p_offset, b_offset, size, flags);
 581
 582         gpuobj = kzalloc(sizeof(*gpuobj), GFP_KERNEL);
 583         if (!gpuobj)
 584                 return -ENOMEM;
 585         NV_DEBUG(dev, "gpuobj %p\n", gpuobj);
 586         gpuobj->im_channel = NULL;
 587         gpuobj->flags      = flags | NVOBJ_FLAG_FAKE;
 588
 589         list_add_tail(&gpuobj->list, &dev_priv->gpuobj_list);
 590
 591         if (p_offset != ~0) {
 592                 gpuobj->im_pramin = kzalloc(sizeof(struct mem_block),
 593                                             GFP_KERNEL);
 594                 if (!gpuobj->im_pramin) {
 595                         nouveau_gpuobj_del(dev, &gpuobj);
 596                         return -ENOMEM;
 597                 }
 598                 gpuobj->im_pramin->start = p_offset;
 599                 gpuobj->im_pramin->size  = size;
 600         }
 601
 602         if (b_offset != ~0) {
 603                 gpuobj->im_backing = (struct nouveau_bo *)-1;
 604                 gpuobj->im_backing_start = b_offset;
 605         }
 606
 607         if (gpuobj->flags & NVOBJ_FLAG_ZERO_ALLOC) {
 608                 dev_priv->engine.instmem.prepare_access(dev, true);
 609                 for (i = 0; i < gpuobj->im_pramin->size; i += 4)
 610                         nv_wo32(dev, gpuobj, i/4, 0);
 611                 dev_priv->engine.instmem.finish_access(dev);
 612         }
 613
 614         if (pref) {
 615                 i = nouveau_gpuobj_ref_add(dev, NULL, 0, gpuobj, pref);
 616                 if (i) {
 617                         nouveau_gpuobj_del(dev, &gpuobj);
 618                         return i;
 619                 }
 620         }
 621
 622         if (pgpuobj)
 623                 *pgpuobj = gpuobj;
 624         return 0;
 625 }
 626
 627
 628 static uint32_t
 629 nouveau_gpuobj_class_instmem_size(struct drm_device *dev, int class)
 630 {
 631         struct drm_nouveau_private *dev_priv = dev->dev_private;
 632
 633         /*XXX: dodgy hack for now */
 634         if (dev_priv->card_type >= NV_50)
 635                 return 24;
 636         if (dev_priv->card_type >= NV_40)
 637                 return 32;
 638         return 16;
 639 }
 640
 641 /*
 642    DMA objects are used to reference a piece of memory in the
 643    framebuffer, PCI or AGP address space. Each object is 16 bytes big
 644    and looks as follows:
 645
 646    entry[0]
 647    11:0  class (seems like I can always use 0 here)
 648    12    page table present?
 649    13    page entry linear?
 650    15:14 access: 0 rw, 1 ro, 2 wo
 651    17:16 target: 0 NV memory, 1 NV memory tiled, 2 PCI, 3 AGP
 652    31:20 dma adjust (bits 0-11 of the address)
 653    entry[1]
 654    dma limit (size of transfer)
 655    entry[X]
 656    1     0 readonly, 1 readwrite
 657    31:12 dma frame address of the page (bits 12-31 of the address)
 658    entry[N]
 659    page table terminator, same value as the first pte, as does nvidia
 660    rivatv uses 0xffffffff
 661
 662    Non linear page tables need a list of frame addresses afterwards,
 663    the rivatv project has some info on this.
 664
 665    The method below creates a DMA object in instance RAM and returns a handle
 666    to it that can be used to set up context objects.
 667 */
 668 int
 669 nouveau_gpuobj_dma_new(struct nouveau_channel *chan, int class,
 670                        uint64_t offset, uint64_t size, int access,
 671                        int target, struct nouveau_gpuobj **gpuobj)
 672 {
 673         struct drm_device *dev = chan->dev;
 674         struct drm_nouveau_private *dev_priv = dev->dev_private;
 675         struct nouveau_instmem_engine *instmem = &dev_priv->engine.instmem;
 676         int ret;
 677
 678         NV_DEBUG(dev, "ch%d class=0x%04x offset=0x%llx size=0x%llx\n",
 679                  chan->id, class, offset, size);
 680         NV_DEBUG(dev, "access=%d target=%d\n", access, target);
 681
 682         switch (target) {
 683         case NV_DMA_TARGET_AGP:
 684                 offset += dev_priv->gart_info.aper_base;
 685                 break;
 686         default:
 687                 break;
 688         }
 689
 690         ret = nouveau_gpuobj_new(dev, chan,
 691                                  nouveau_gpuobj_class_instmem_size(dev, class),
 692                                  16, NVOBJ_FLAG_ZERO_ALLOC |
 693                                  NVOBJ_FLAG_ZERO_FREE, gpuobj);
 694         if (ret) {
 695                 NV_ERROR(dev, "Error creating gpuobj: %d\n", ret);
 696                 return ret;
 697         }
 698
 699         instmem->prepare_access(dev, true);
 700
 701         if (dev_priv->card_type < NV_50) {
 702                 uint32_t frame, adjust, pte_flags = 0;
 703
 704                 if (access != NV_DMA_ACCESS_RO)
 705                         pte_flags |= (1<<1);
 706                 adjust = offset &  0x00000fff;
 707                 frame  = offset & ~0x00000fff;
 708
 709                 nv_wo32(dev, *gpuobj, 0, ((1<<12) | (1<<13) |
 710                                 (adjust << 20) |
 711                                  (access << 14) |
 712                                  (target << 16) |
 713                                   class));
 714                 nv_wo32(dev, *gpuobj, 1, size - 1);
 715                 nv_wo32(dev, *gpuobj, 2, frame | pte_flags);
 716                 nv_wo32(dev, *gpuobj, 3, frame | pte_flags);
 717         } else {
 718                 uint64_t limit = offset + size - 1;
 719                 uint32_t flags0, flags5;
 720
 721                 if (target == NV_DMA_TARGET_VIDMEM) {
 722                         flags0 = 0x00190000;
 723                         flags5 = 0x00010000;
 724                 } else {
 725                         flags0 = 0x7fc00000;
 726                         flags5 = 0x00080000;
 727                 }
 728
 729                 nv_wo32(dev, *gpuobj, 0, flags0 | class);
 730                 nv_wo32(dev, *gpuobj, 1, lower_32_bits(limit));
 731                 nv_wo32(dev, *gpuobj, 2, lower_32_bits(offset));
 732                 nv_wo32(dev, *gpuobj, 3, ((upper_32_bits(limit) & 0xff) << 24) |
 733                                         (upper_32_bits(offset) & 0xff));
 734                 nv_wo32(dev, *gpuobj, 5, flags5);
 735         }
 736
 737         instmem->finish_access(dev);
 738
 739         (*gpuobj)->engine = NVOBJ_ENGINE_SW;
 740         (*gpuobj)->class  = class;
 741         return 0;
 742 }
 743
 744 int
 745 nouveau_gpuobj_gart_dma_new(struct nouveau_channel *chan,
 746                             uint64_t offset, uint64_t size, int access,
 747                             struct nouveau_gpuobj **gpuobj,
 748                             uint32_t *o_ret)
 749 {
 750         struct drm_device *dev = chan->dev;
 751         struct drm_nouveau_private *dev_priv = dev->dev_private;
 752         int ret;
 753
 754         if (dev_priv->gart_info.type == NOUVEAU_GART_AGP ||
 755             (dev_priv->card_type >= NV_50 &&
 756              dev_priv->gart_info.type == NOUVEAU_GART_SGDMA)) {
 757                 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY,
 758                                              offset + dev_priv->vm_gart_base,
 759                                              size, access, NV_DMA_TARGET_AGP,
 760                                              gpuobj);
 761                 if (o_ret)
 762                         *o_ret = 0;
 763         } else
 764         if (dev_priv->gart_info.type == NOUVEAU_GART_SGDMA) {
 765                 *gpuobj = dev_priv->gart_info.sg_ctxdma;
 766                 if (offset & ~0xffffffffULL) {
 767                         NV_ERROR(dev, "obj offset exceeds 32-bits\n");
 768                         return -EINVAL;
 769                 }
 770                 if (o_ret)
 771                         *o_ret = (uint32_t)offset;
 772                 ret = (*gpuobj != NULL) ? 0 : -EINVAL;
 773         } else {
 774                 NV_ERROR(dev, "Invalid GART type %d\n", dev_priv->gart_info.type);
 775                 return -EINVAL;
 776         }
 777
 778         return ret;
 779 }
 780
 781 /* Context objects in the instance RAM have the following structure.
 782  * On NV40 they are 32 byte long, on NV30 and smaller 16 bytes.
 783
 784    NV4 - NV30:
 785
 786    entry[0]
 787    11:0 class
 788    12   chroma key enable
 789    13   user clip enable
 790    14   swizzle enable
 791    17:15 patch config:
 792        scrcopy_and, rop_and, blend_and, scrcopy, srccopy_pre, blend_pre
 793    18   synchronize enable
 794    19   endian: 1 big, 0 little
 795    21:20 dither mode
 796    23    single step enable
 797    24    patch status: 0 invalid, 1 valid
 798    25    context_surface 0: 1 valid
 799    26    context surface 1: 1 valid
 800    27    context pattern: 1 valid
 801    28    context rop: 1 valid
 802    29,30 context beta, beta4
 803    entry[1]
 804    7:0   mono format
 805    15:8  color format
 806    31:16 notify instance address
 807    entry[2]
 808    15:0  dma 0 instance address
 809    31:16 dma 1 instance address
 810    entry[3]
 811    dma method traps
 812
 813    NV40:
 814    No idea what the exact format is. Here's what can be deducted:
 815
 816    entry[0]:
 817    11:0  class  (maybe uses more bits here?)
 818    17    user clip enable
 819    21:19 patch config
 820    25    patch status valid ?
 821    entry[1]:
 822    15:0  DMA notifier  (maybe 20:0)
 823    entry[2]:
 824    15:0  DMA 0 instance (maybe 20:0)
 825    24    big endian
 826    entry[3]:
 827    15:0  DMA 1 instance (maybe 20:0)
 828    entry[4]:
 829    entry[5]:
 830    set to 0?
 831 */
 832 int
 833 nouveau_gpuobj_gr_new(struct nouveau_channel *chan, int class,
 834                       struct nouveau_gpuobj **gpuobj)
 835 {
 836         struct drm_device *dev = chan->dev;
 837         struct drm_nouveau_private *dev_priv = dev->dev_private;
 838         int ret;
 839
 840         NV_DEBUG(dev, "ch%d class=0x%04x\n", chan->id, class);
 841
 842         ret = nouveau_gpuobj_new(dev, chan,
 843                                  nouveau_gpuobj_class_instmem_size(dev, class),
 844                                  16,
 845                                  NVOBJ_FLAG_ZERO_ALLOC | NVOBJ_FLAG_ZERO_FREE,
 846                                  gpuobj);
 847         if (ret) {
 848                 NV_ERROR(dev, "Error creating gpuobj: %d\n", ret);
 849                 return ret;
 850         }
 851
 852         dev_priv->engine.instmem.prepare_access(dev, true);
 853         if (dev_priv->card_type >= NV_50) {
 854                 nv_wo32(dev, *gpuobj, 0, class);
 855                 nv_wo32(dev, *gpuobj, 5, 0x00010000);
 856         } else {
 857                 switch (class) {
 858                 case NV_CLASS_NULL:
 859                         nv_wo32(dev, *gpuobj, 0, 0x00001030);
 860                         nv_wo32(dev, *gpuobj, 1, 0xFFFFFFFF);
 861                         break;
 862                 default:
 863                         if (dev_priv->card_type >= NV_40) {
 864                                 nv_wo32(dev, *gpuobj, 0, class);
 865 #ifdef __BIG_ENDIAN
 866                                 nv_wo32(dev, *gpuobj, 2, 0x01000000);
 867 #endif
 868                         } else {
 869 #ifdef __BIG_ENDIAN
 870                                 nv_wo32(dev, *gpuobj, 0, class | 0x00080000);
 871 #else
 872                                 nv_wo32(dev, *gpuobj, 0, class);
 873 #endif
 874                         }
 875                 }
 876         }
 877         dev_priv->engine.instmem.finish_access(dev);
 878
 879         (*gpuobj)->engine = NVOBJ_ENGINE_GR;
 880         (*gpuobj)->class  = class;
 881         return 0;
 882 }
 883
 884 int
 885 nouveau_gpuobj_sw_new(struct nouveau_channel *chan, int class,
 886                       struct nouveau_gpuobj **gpuobj_ret)
 887 {
 888         struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
 889         struct nouveau_gpuobj *gpuobj;
 890
 891         if (!chan || !gpuobj_ret || *gpuobj_ret != NULL)
 892                 return -EINVAL;
 893
 894         gpuobj = kzalloc(sizeof(*gpuobj), GFP_KERNEL);
 895         if (!gpuobj)
 896                 return -ENOMEM;
 897         gpuobj->engine = NVOBJ_ENGINE_SW;
 898         gpuobj->class = class;
 899
 900         list_add_tail(&gpuobj->list, &dev_priv->gpuobj_list);
 901         *gpuobj_ret = gpuobj;
 902         return 0;
 903 }
 904
 905 static int
 906 nouveau_gpuobj_channel_init_pramin(struct nouveau_channel *chan)
 907 {
 908         struct drm_device *dev = chan->dev;
 909         struct drm_nouveau_private *dev_priv = dev->dev_private;
 910         struct nouveau_gpuobj *pramin = NULL;
 911         uint32_t size;
 912         uint32_t base;
 913         int ret;
 914
 915         NV_DEBUG(dev, "ch%d\n", chan->id);
 916
 917         /* Base amount for object storage (4KiB enough?) */
 918         size = 0x1000;
 919         base = 0;
 920
 921         /* PGRAPH context */
 922
 923         if (dev_priv->card_type == NV_50) {
 924                 /* Various fixed table thingos */
 925                 size += 0x1400; /* mostly unknown stuff */
 926                 size += 0x4000; /* vm pd */
 927                 base  = 0x6000;
 928                 /* RAMHT, not sure about setting size yet, 32KiB to be safe */
 929                 size += 0x8000;
 930                 /* RAMFC */
 931                 size += 0x1000;
 932                 /* PGRAPH context */
 933                 size += 0x70000;
 934         }
 935
 936         NV_DEBUG(dev, "ch%d PRAMIN size: 0x%08x bytes, base alloc=0x%08x\n",
 937                  chan->id, size, base);
 938         ret = nouveau_gpuobj_new_ref(dev, NULL, NULL, 0, size, 0x1000, 0,
 939                                      &chan->ramin);
 940         if (ret) {
 941                 NV_ERROR(dev, "Error allocating channel PRAMIN: %d\n", ret);
 942                 return ret;
 943         }
 944         pramin = chan->ramin->gpuobj;
 945
 946         ret = nouveau_mem_init_heap(&chan->ramin_heap,
 947                                     pramin->im_pramin->start + base, size);
 948         if (ret) {
 949                 NV_ERROR(dev, "Error creating PRAMIN heap: %d\n", ret);
 950                 nouveau_gpuobj_ref_del(dev, &chan->ramin);
 951                 return ret;
 952         }
 953
 954         return 0;
 955 }
 956
 957 int
 958 nouveau_gpuobj_channel_init(struct nouveau_channel *chan,
 959                             uint32_t vram_h, uint32_t tt_h)
 960 {
 961         struct drm_device *dev = chan->dev;
 962         struct drm_nouveau_private *dev_priv = dev->dev_private;
 963         struct nouveau_instmem_engine *instmem = &dev_priv->engine.instmem;
 964         struct nouveau_gpuobj *vram = NULL, *tt = NULL;
 965         int ret, i;
 966
 967         INIT_LIST_HEAD(&chan->ramht_refs);
 968
 969         NV_DEBUG(dev, "ch%d vram=0x%08x tt=0x%08x\n", chan->id, vram_h, tt_h);
 970
 971         /* Reserve a block of PRAMIN for the channel
 972          *XXX: maybe on <NV50 too at some point
 973          */
 974         if (0 || dev_priv->card_type == NV_50) {
 975                 ret = nouveau_gpuobj_channel_init_pramin(chan);
 976                 if (ret) {
 977                         NV_ERROR(dev, "init pramin\n");
 978                         return ret;
 979                 }
 980         }
 981
 982         /* NV50 VM
 983          *  - Allocate per-channel page-directory
 984          *  - Map GART and VRAM into the channel's address space at the
 985          *    locations determined during init.
 986          */
 987         if (dev_priv->card_type >= NV_50) {
 988                 uint32_t vm_offset, pde;
 989
 990                 instmem->prepare_access(dev, true);
 991
 992                 vm_offset = (dev_priv->chipset & 0xf0) == 0x50 ? 0x1400 : 0x200;
 993                 vm_offset += chan->ramin->gpuobj->im_pramin->start;
 994
 995                 ret = nouveau_gpuobj_new_fake(dev, vm_offset, ~0, 0x4000,
 996                                                         0, &chan->vm_pd, NULL);
 997                 if (ret) {
 998                         instmem->finish_access(dev);
 999                         return ret;
1000                 }
1001                 for (i = 0; i < 0x4000; i += 8) {
1002                         nv_wo32(dev, chan->vm_pd, (i+0)/4, 0x00000000);
1003                         nv_wo32(dev, chan->vm_pd, (i+4)/4, 0xdeadcafe);
1004                 }
1005
1006                 pde = (dev_priv->vm_gart_base / (512*1024*1024)) * 2;
1007                 ret = nouveau_gpuobj_ref_add(dev, NULL, 0,
1008                                              dev_priv->gart_info.sg_ctxdma,
1009                                              &chan->vm_gart_pt);
1010                 if (ret) {
1011                         instmem->finish_access(dev);
1012                         return ret;
1013                 }
1014                 nv_wo32(dev, chan->vm_pd, pde++,
1015                             chan->vm_gart_pt->instance | 0x03);
1016                 nv_wo32(dev, chan->vm_pd, pde++, 0x00000000);
1017
1018                 pde = (dev_priv->vm_vram_base / (512*1024*1024)) * 2;
1019                 for (i = 0; i < dev_priv->vm_vram_pt_nr; i++) {
1020                         ret = nouveau_gpuobj_ref_add(dev, NULL, 0,
1021                                                      dev_priv->vm_vram_pt[i],
1022                                                      &chan->vm_vram_pt[i]);
1023                         if (ret) {
1024                                 instmem->finish_access(dev);
1025                                 return ret;
1026                         }
1027
1028                         nv_wo32(dev, chan->vm_pd, pde++,
1029                                     chan->vm_vram_pt[i]->instance | 0x61);
1030                         nv_wo32(dev, chan->vm_pd, pde++, 0x00000000);
1031                 }
1032
1033                 instmem->finish_access(dev);
1034         }
1035
1036         /* RAMHT */
1037         if (dev_priv->card_type < NV_50) {
1038                 ret = nouveau_gpuobj_ref_add(dev, NULL, 0, dev_priv->ramht,
1039                                              &chan->ramht);
1040                 if (ret)
1041                         return ret;
1042         } else {
1043                 ret = nouveau_gpuobj_new_ref(dev, chan, chan, 0,
1044                                              0x8000, 16,
1045                                              NVOBJ_FLAG_ZERO_ALLOC,
1046                                              &chan->ramht);
1047                 if (ret)
1048                         return ret;
1049         }
1050
1051         /* VRAM ctxdma */
1052         if (dev_priv->card_type >= NV_50) {
1053                 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY,
1054                                              0, dev_priv->vm_end,
1055                                              NV_DMA_ACCESS_RW,
1056                                              NV_DMA_TARGET_AGP, &vram);
1057                 if (ret) {
1058                         NV_ERROR(dev, "Error creating VRAM ctxdma: %d\n", ret);
1059                         return ret;
1060                 }
1061         } else {
1062                 ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY,
1063                                                 0, dev_priv->fb_available_size,
1064                                                 NV_DMA_ACCESS_RW,
1065                                                 NV_DMA_TARGET_VIDMEM, &vram);
1066                 if (ret) {
1067                         NV_ERROR(dev, "Error creating VRAM ctxdma: %d\n", ret);
1068                         return ret;
1069                 }
1070         }
1071
1072         ret = nouveau_gpuobj_ref_add(dev, chan, vram_h, vram, NULL);
1073         if (ret) {
1074                 NV_ERROR(dev, "Error referencing VRAM ctxdma: %d\n", ret);
1075                 return ret;
1076         }
1077
1078         /* TT memory ctxdma */
1079         if (dev_priv->card_type >= NV_50) {
1080                 tt = vram;
1081         } else
1082         if (dev_priv->gart_info.type != NOUVEAU_GART_NONE) {
1083                 ret = nouveau_gpuobj_gart_dma_new(chan, 0,
1084                                                   dev_priv->gart_info.aper_size,
1085                                                   NV_DMA_ACCESS_RW, &tt, NULL);
1086         } else {
1087                 NV_ERROR(dev, "Invalid GART type %d\n", dev_priv->gart_info.type);
1088                 ret = -EINVAL;
1089         }
1090
1091         if (ret) {
1092                 NV_ERROR(dev, "Error creating TT ctxdma: %d\n", ret);
1093                 return ret;
1094         }
1095
1096         ret = nouveau_gpuobj_ref_add(dev, chan, tt_h, tt, NULL);
1097         if (ret) {
1098                 NV_ERROR(dev, "Error referencing TT ctxdma: %d\n", ret);
1099                 return ret;
1100         }
1101
1102         return 0;
1103 }
1104
1105 void
1106 nouveau_gpuobj_channel_takedown(struct nouveau_channel *chan)
1107 {
1108         struct drm_nouveau_private *dev_priv = chan->dev->dev_private;
1109         struct drm_device *dev = chan->dev;
1110         struct list_head *entry, *tmp;
1111         struct nouveau_gpuobj_ref *ref;
1112         int i;
1113
1114         NV_DEBUG(dev, "ch%d\n", chan->id);
1115
1116         if (!chan->ramht_refs.next)
1117                 return;
1118
1119         list_for_each_safe(entry, tmp, &chan->ramht_refs) {
1120                 ref = list_entry(entry, struct nouveau_gpuobj_ref, list);
1121
1122                 nouveau_gpuobj_ref_del(dev, &ref);
1123         }
1124
1125         nouveau_gpuobj_ref_del(dev, &chan->ramht);
1126
1127         nouveau_gpuobj_del(dev, &chan->vm_pd);
1128         nouveau_gpuobj_ref_del(dev, &chan->vm_gart_pt);
1129         for (i = 0; i < dev_priv->vm_vram_pt_nr; i++)
1130                 nouveau_gpuobj_ref_del(dev, &chan->vm_vram_pt[i]);
1131
1132         if (chan->ramin_heap)
1133                 nouveau_mem_takedown(&chan->ramin_heap);
1134         if (chan->ramin)
1135                 nouveau_gpuobj_ref_del(dev, &chan->ramin);
1136
1137 }
1138
1139 int
1140 nouveau_gpuobj_suspend(struct drm_device *dev)
1141 {
1142         struct drm_nouveau_private *dev_priv = dev->dev_private;
1143         struct nouveau_gpuobj *gpuobj;
1144         int i;
1145
1146         if (dev_priv->card_type < NV_50) {
1147                 dev_priv->susres.ramin_copy = vmalloc(dev_priv->ramin_rsvd_vram);
1148                 if (!dev_priv->susres.ramin_copy)
1149                         return -ENOMEM;
1150
1151                 for (i = 0; i < dev_priv->ramin_rsvd_vram; i += 4)
1152                         dev_priv->susres.ramin_copy[i/4] = nv_ri32(dev, i);
1153                 return 0;
1154         }
1155
1156         list_for_each_entry(gpuobj, &dev_priv->gpuobj_list, list) {
1157                 if (!gpuobj->im_backing || (gpuobj->flags & NVOBJ_FLAG_FAKE))
1158                         continue;
1159
1160                 gpuobj->im_backing_suspend = vmalloc(gpuobj->im_pramin->size);
1161                 if (!gpuobj->im_backing_suspend) {
1162                         nouveau_gpuobj_resume(dev);
1163                         return -ENOMEM;
1164                 }
1165
1166                 dev_priv->engine.instmem.prepare_access(dev, false);
1167                 for (i = 0; i < gpuobj->im_pramin->size / 4; i++)
1168                         gpuobj->im_backing_suspend[i] = nv_ro32(dev, gpuobj, i);
1169                 dev_priv->engine.instmem.finish_access(dev);
1170         }
1171
1172         return 0;
1173 }
1174
1175 void
1176 nouveau_gpuobj_suspend_cleanup(struct drm_device *dev)
1177 {
1178         struct drm_nouveau_private *dev_priv = dev->dev_private;
1179         struct nouveau_gpuobj *gpuobj;
1180
1181         if (dev_priv->card_type < NV_50) {
1182                 vfree(dev_priv->susres.ramin_copy);
1183                 dev_priv->susres.ramin_copy = NULL;
1184                 return;
1185         }
1186
1187         list_for_each_entry(gpuobj, &dev_priv->gpuobj_list, list) {
1188                 if (!gpuobj->im_backing_suspend)
1189                         continue;
1190
1191                 vfree(gpuobj->im_backing_suspend);
1192                 gpuobj->im_backing_suspend = NULL;
1193         }
1194 }
1195
1196 void
1197 nouveau_gpuobj_resume(struct drm_device *dev)
1198 {
1199         struct drm_nouveau_private *dev_priv = dev->dev_private;
1200         struct nouveau_gpuobj *gpuobj;
1201         int i;
1202
1203         if (dev_priv->card_type < NV_50) {
1204                 for (i = 0; i < dev_priv->ramin_rsvd_vram; i += 4)
1205                         nv_wi32(dev, i, dev_priv->susres.ramin_copy[i/4]);
1206                 nouveau_gpuobj_suspend_cleanup(dev);
1207                 return;
1208         }
1209
1210         list_for_each_entry(gpuobj, &dev_priv->gpuobj_list, list) {
1211                 if (!gpuobj->im_backing_suspend)
1212                         continue;
1213
1214                 dev_priv->engine.instmem.prepare_access(dev, true);
1215                 for (i = 0; i < gpuobj->im_pramin->size / 4; i++)
1216                         nv_wo32(dev, gpuobj, i, gpuobj->im_backing_suspend[i]);
1217                 dev_priv->engine.instmem.finish_access(dev);
1218         }
1219
1220         nouveau_gpuobj_suspend_cleanup(dev);
1221 }
1222
1223 int nouveau_ioctl_grobj_alloc(struct drm_device *dev, void *data,
1224                               struct drm_file *file_priv)
1225 {
1226         struct drm_nouveau_private *dev_priv = dev->dev_private;
1227         struct drm_nouveau_grobj_alloc *init = data;
1228         struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
1229         struct nouveau_pgraph_object_class *grc;
1230         struct nouveau_gpuobj *gr = NULL;
1231         struct nouveau_channel *chan;
1232         int ret;
1233
1234         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
1235         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(init->channel, file_priv, chan);
1236
1237         if (init->handle == ~0)
1238                 return -EINVAL;
1239
1240         grc = pgraph->grclass;
1241         while (grc->id) {
1242                 if (grc->id == init->class)
1243                         break;
1244                 grc++;
1245         }
1246
1247         if (!grc->id) {
1248                 NV_ERROR(dev, "Illegal object class: 0x%x\n", init->class);
1249                 return -EPERM;
1250         }
1251
1252         if (nouveau_gpuobj_ref_find(chan, init->handle, NULL) == 0)
1253                 return -EEXIST;
1254
1255         if (!grc->software)
1256                 ret = nouveau_gpuobj_gr_new(chan, grc->id, &gr);
1257         else
1258                 ret = nouveau_gpuobj_sw_new(chan, grc->id, &gr);
1259
1260         if (ret) {
1261                 NV_ERROR(dev, "Error creating object: %d (%d/0x%08x)\n",
1262                          ret, init->channel, init->handle);
1263                 return ret;
1264         }
1265
1266         ret = nouveau_gpuobj_ref_add(dev, chan, init->handle, gr, NULL);
1267         if (ret) {
1268                 NV_ERROR(dev, "Error referencing object: %d (%d/0x%08x)\n",
1269                          ret, init->channel, init->handle);
1270                 nouveau_gpuobj_del(dev, &gr);
1271                 return ret;
1272         }
1273
1274         return 0;
1275 }
1276
1277 int nouveau_ioctl_gpuobj_free(struct drm_device *dev, void *data,
1278                               struct drm_file *file_priv)
1279 {
1280         struct drm_nouveau_gpuobj_free *objfree = data;
1281         struct nouveau_gpuobj_ref *ref;
1282         struct nouveau_channel *chan;
1283         int ret;
1284
1285         NOUVEAU_CHECK_INITIALISED_WITH_RETURN;
1286         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(objfree->channel, file_priv, chan);
1287
1288         ret = nouveau_gpuobj_ref_find(chan, objfree->handle, &ref);
1289         if (ret)
1290                 return ret;
1291         nouveau_gpuobj_ref_del(dev, &ref);
1292
1293         return 0;
1294 }