drivers/gpu/drm/nouveau/nouveau_abi16.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23
  24 #include <nvif/client.h>
  25 #include <nvif/driver.h>
  26 #include <nvif/fifo.h>
  27 #include <nvif/ioctl.h>
  28 #include <nvif/class.h>
  29 #include <nvif/cl0002.h>
  30 #include <nvif/unpack.h>
  31
  32 #include "nouveau_drv.h"
  33 #include "nouveau_dma.h"
  34 #include "nouveau_gem.h"
  35 #include "nouveau_chan.h"
  36 #include "nouveau_abi16.h"
  37 #include "nouveau_vmm.h"
  38 #include "nouveau_sched.h"
  39
  40 static struct nouveau_abi16 *
  41 nouveau_abi16(struct drm_file *file_priv)
  42 {
  43         struct nouveau_cli *cli = nouveau_cli(file_priv);
  44         if (!cli->abi16) {
  45                 struct nouveau_abi16 *abi16;
  46                 cli->abi16 = abi16 = kzalloc(sizeof(*abi16), GFP_KERNEL);
  47                 if (cli->abi16) {
  48                         struct nv_device_v0 args = {
  49                                 .device = ~0ULL,
  50                         };
  51
  52                         INIT_LIST_HEAD(&abi16->channels);
  53
  54                         /* allocate device object targeting client's default
  55                          * device (ie. the one that belongs to the fd it
  56                          * opened)
  57                          */
  58                         if (nvif_device_ctor(&cli->base.object, "abi16Device",
  59                                              0, NV_DEVICE, &args, sizeof(args),
  60                                              &abi16->device) == 0)
  61                                 return cli->abi16;
  62
  63                         kfree(cli->abi16);
  64                         cli->abi16 = NULL;
  65                 }
  66         }
  67         return cli->abi16;
  68 }
  69
  70 struct nouveau_abi16 *
  71 nouveau_abi16_get(struct drm_file *file_priv)
  72 {
  73         struct nouveau_cli *cli = nouveau_cli(file_priv);
  74         mutex_lock(&cli->mutex);
  75         if (nouveau_abi16(file_priv))
  76                 return cli->abi16;
  77         mutex_unlock(&cli->mutex);
  78         return NULL;
  79 }
  80
  81 int
  82 nouveau_abi16_put(struct nouveau_abi16 *abi16, int ret)
  83 {
  84         struct nouveau_cli *cli = (void *)abi16->device.object.client;
  85         mutex_unlock(&cli->mutex);
  86         return ret;
  87 }
  88
  89 s32
  90 nouveau_abi16_swclass(struct nouveau_drm *drm)
  91 {
  92         switch (drm->client.device.info.family) {
  93         case NV_DEVICE_INFO_V0_TNT:
  94                 return NVIF_CLASS_SW_NV04;
  95         case NV_DEVICE_INFO_V0_CELSIUS:
  96         case NV_DEVICE_INFO_V0_KELVIN:
  97         case NV_DEVICE_INFO_V0_RANKINE:
  98         case NV_DEVICE_INFO_V0_CURIE:
  99                 return NVIF_CLASS_SW_NV10;
 100         case NV_DEVICE_INFO_V0_TESLA:
 101                 return NVIF_CLASS_SW_NV50;
 102         case NV_DEVICE_INFO_V0_FERMI:
 103         case NV_DEVICE_INFO_V0_KEPLER:
 104         case NV_DEVICE_INFO_V0_MAXWELL:
 105         case NV_DEVICE_INFO_V0_PASCAL:
 106         case NV_DEVICE_INFO_V0_VOLTA:
 107                 return NVIF_CLASS_SW_GF100;
 108         }
 109
 110         return 0x0000;
 111 }
 112
 113 static void
 114 nouveau_abi16_ntfy_fini(struct nouveau_abi16_chan *chan,
 115                         struct nouveau_abi16_ntfy *ntfy)
 116 {
 117         nvif_object_dtor(&ntfy->object);
 118         nvkm_mm_free(&chan->heap, &ntfy->node);
 119         list_del(&ntfy->head);
 120         kfree(ntfy);
 121 }
 122
 123 static void
 124 nouveau_abi16_chan_fini(struct nouveau_abi16 *abi16,
 125                         struct nouveau_abi16_chan *chan)
 126 {
 127         struct nouveau_abi16_ntfy *ntfy, *temp;
 128
 129         /* When a client exits without waiting for it's queued up jobs to
 130          * finish it might happen that we fault the channel. This is due to
 131          * drm_file_free() calling drm_gem_release() before the postclose()
 132          * callback. Hence, we can't tear down this scheduler entity before
 133          * uvmm mappings are unmapped. Currently, we can't detect this case.
 134          *
 135          * However, this should be rare and harmless, since the channel isn't
 136          * needed anymore.
 137          */
 138         nouveau_sched_entity_fini(&chan->sched_entity);
 139
 140         /* wait for all activity to stop before cleaning up */
 141         if (chan->chan)
 142                 nouveau_channel_idle(chan->chan);
 143
 144         /* cleanup notifier state */
 145         list_for_each_entry_safe(ntfy, temp, &chan->notifiers, head) {
 146                 nouveau_abi16_ntfy_fini(chan, ntfy);
 147         }
 148
 149         if (chan->ntfy) {
 150                 nouveau_vma_del(&chan->ntfy_vma);
 151                 nouveau_bo_unpin(chan->ntfy);
 152                 drm_gem_object_put(&chan->ntfy->bo.base);
 153         }
 154
 155         if (chan->heap.block_size)
 156                 nvkm_mm_fini(&chan->heap);
 157
 158         /* destroy channel object, all children will be killed too */
 159         if (chan->chan) {
 160                 nvif_object_dtor(&chan->ce);
 161                 nouveau_channel_del(&chan->chan);
 162         }
 163
 164         list_del(&chan->head);
 165         kfree(chan);
 166 }
 167
 168 void
 169 nouveau_abi16_fini(struct nouveau_abi16 *abi16)
 170 {
 171         struct nouveau_cli *cli = (void *)abi16->device.object.client;
 172         struct nouveau_abi16_chan *chan, *temp;
 173
 174         /* cleanup channels */
 175         list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
 176                 nouveau_abi16_chan_fini(abi16, chan);
 177         }
 178
 179         /* destroy the device object */
 180         nvif_device_dtor(&abi16->device);
 181
 182         kfree(cli->abi16);
 183         cli->abi16 = NULL;
 184 }
 185
 186 int
 187 nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
 188 {
 189         struct nouveau_cli *cli = nouveau_cli(file_priv);
 190         struct nouveau_drm *drm = nouveau_drm(dev);
 191         struct nvif_device *device = &drm->client.device;
 192         struct nvkm_gr *gr = nvxx_gr(device);
 193         struct drm_nouveau_getparam *getparam = data;
 194         struct pci_dev *pdev = to_pci_dev(dev->dev);
 195
 196         switch (getparam->param) {
 197         case NOUVEAU_GETPARAM_CHIPSET_ID:
 198                 getparam->value = device->info.chipset;
 199                 break;
 200         case NOUVEAU_GETPARAM_PCI_VENDOR:
 201                 if (device->info.platform != NV_DEVICE_INFO_V0_SOC)
 202                         getparam->value = pdev->vendor;
 203                 else
 204                         getparam->value = 0;
 205                 break;
 206         case NOUVEAU_GETPARAM_PCI_DEVICE:
 207                 if (device->info.platform != NV_DEVICE_INFO_V0_SOC)
 208                         getparam->value = pdev->device;
 209                 else
 210                         getparam->value = 0;
 211                 break;
 212         case NOUVEAU_GETPARAM_BUS_TYPE:
 213                 switch (device->info.platform) {
 214                 case NV_DEVICE_INFO_V0_AGP : getparam->value = 0; break;
 215                 case NV_DEVICE_INFO_V0_PCI : getparam->value = 1; break;
 216                 case NV_DEVICE_INFO_V0_PCIE: getparam->value = 2; break;
 217                 case NV_DEVICE_INFO_V0_SOC : getparam->value = 3; break;
 218                 case NV_DEVICE_INFO_V0_IGP :
 219                         if (!pci_is_pcie(pdev))
 220                                 getparam->value = 1;
 221                         else
 222                                 getparam->value = 2;
 223                         break;
 224                 default:
 225                         WARN_ON(1);
 226                         break;
 227                 }
 228                 break;
 229         case NOUVEAU_GETPARAM_FB_SIZE:
 230                 getparam->value = drm->gem.vram_available;
 231                 break;
 232         case NOUVEAU_GETPARAM_AGP_SIZE:
 233                 getparam->value = drm->gem.gart_available;
 234                 break;
 235         case NOUVEAU_GETPARAM_VM_VRAM_BASE:
 236                 getparam->value = 0; /* deprecated */
 237                 break;
 238         case NOUVEAU_GETPARAM_PTIMER_TIME:
 239                 getparam->value = nvif_device_time(device);
 240                 break;
 241         case NOUVEAU_GETPARAM_HAS_BO_USAGE:
 242                 getparam->value = 1;
 243                 break;
 244         case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
 245                 getparam->value = 1;
 246                 break;
 247         case NOUVEAU_GETPARAM_GRAPH_UNITS:
 248                 getparam->value = nvkm_gr_units(gr);
 249                 break;
 250         default:
 251                 NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);
 252                 return -EINVAL;
 253         }
 254
 255         return 0;
 256 }
 257
 258 int
 259 nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
 260 {
 261         struct drm_nouveau_channel_alloc *init = data;
 262         struct nouveau_cli *cli = nouveau_cli(file_priv);
 263         struct nouveau_drm *drm = nouveau_drm(dev);
 264         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 265         struct nouveau_abi16_chan *chan;
 266         struct nvif_device *device;
 267         u64 engine, runm;
 268         int ret;
 269
 270         if (unlikely(!abi16))
 271                 return -ENOMEM;
 272
 273         if (!drm->channel)
 274                 return nouveau_abi16_put(abi16, -ENODEV);
 275
 276         /* If uvmm wasn't initialized until now disable it completely to prevent
 277          * userspace from mixing up UAPIs.
 278          *
 279          * The client lock is already acquired by nouveau_abi16_get().
 280          */
 281         __nouveau_cli_disable_uvmm_noinit(cli);
 282
 283         device = &abi16->device;
 284         engine = NV_DEVICE_HOST_RUNLIST_ENGINES_GR;
 285
 286         /* hack to allow channel engine type specification on kepler */
 287         if (device->info.family >= NV_DEVICE_INFO_V0_KEPLER) {
 288                 if (init->fb_ctxdma_handle == ~0) {
 289                         switch (init->tt_ctxdma_handle) {
 290                         case 0x01: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_GR    ; break;
 291                         case 0x02: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_MSPDEC; break;
 292                         case 0x04: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_MSPPP ; break;
 293                         case 0x08: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_MSVLD ; break;
 294                         case 0x30: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_CE    ; break;
 295                         default:
 296                                 return nouveau_abi16_put(abi16, -ENOSYS);
 297                         }
 298
 299                         init->fb_ctxdma_handle = 0;
 300                         init->tt_ctxdma_handle = 0;
 301                 }
 302         }
 303
 304         if (engine != NV_DEVICE_HOST_RUNLIST_ENGINES_CE)
 305                 runm = nvif_fifo_runlist(device, engine);
 306         else
 307                 runm = nvif_fifo_runlist_ce(device);
 308
 309         if (!runm || init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
 310                 return nouveau_abi16_put(abi16, -EINVAL);
 311
 312         /* allocate "abi16 channel" data and make up a handle for it */
 313         chan = kzalloc(sizeof(*chan), GFP_KERNEL);
 314         if (!chan)
 315                 return nouveau_abi16_put(abi16, -ENOMEM);
 316
 317         INIT_LIST_HEAD(&chan->notifiers);
 318         list_add(&chan->head, &abi16->channels);
 319
 320         /* create channel object and initialise dma and fence management */
 321         ret = nouveau_channel_new(drm, device, false, runm, init->fb_ctxdma_handle,
 322                                   init->tt_ctxdma_handle, &chan->chan);
 323         if (ret)
 324                 goto done;
 325
 326         ret = nouveau_sched_entity_init(&chan->sched_entity, &drm->sched,
 327                                         drm->sched_wq);
 328         if (ret)
 329                 goto done;
 330
 331         init->channel = chan->chan->chid;
 332
 333         if (device->info.family >= NV_DEVICE_INFO_V0_TESLA)
 334                 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
 335                                         NOUVEAU_GEM_DOMAIN_GART;
 336         else
 337         if (chan->chan->push.buffer->bo.resource->mem_type == TTM_PL_VRAM)
 338                 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
 339         else
 340                 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
 341
 342         if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
 343                 init->subchan[0].handle = 0x00000000;
 344                 init->subchan[0].grclass = 0x0000;
 345                 init->subchan[1].handle = chan->chan->nvsw.handle;
 346                 init->subchan[1].grclass = 0x506e;
 347                 init->nr_subchan = 2;
 348         }
 349
 350         /* Workaround "nvc0" gallium driver using classes it doesn't allocate on
 351          * Kepler and above.  NVKM no longer always sets CE_CTX_VALID as part of
 352          * channel init, now we know what that stuff actually is.
 353          *
 354          * Doesn't matter for Kepler/Pascal, CE context stored in NV_RAMIN.
 355          *
 356          * Userspace was fixed prior to adding Ampere support.
 357          */
 358         switch (device->info.family) {
 359         case NV_DEVICE_INFO_V0_VOLTA:
 360                 ret = nvif_object_ctor(&chan->chan->user, "abi16CeWar", 0, VOLTA_DMA_COPY_A,
 361                                        NULL, 0, &chan->ce);
 362                 if (ret)
 363                         goto done;
 364                 break;
 365         case NV_DEVICE_INFO_V0_TURING:
 366                 ret = nvif_object_ctor(&chan->chan->user, "abi16CeWar", 0, TURING_DMA_COPY_A,
 367                                        NULL, 0, &chan->ce);
 368                 if (ret)
 369                         goto done;
 370                 break;
 371         default:
 372                 break;
 373         }
 374
 375         /* Named memory object area */
 376         ret = nouveau_gem_new(cli, PAGE_SIZE, 0, NOUVEAU_GEM_DOMAIN_GART,
 377                               0, 0, &chan->ntfy);
 378         if (ret == 0)
 379                 ret = nouveau_bo_pin(chan->ntfy, NOUVEAU_GEM_DOMAIN_GART,
 380                                      false);
 381         if (ret)
 382                 goto done;
 383
 384         if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 385                 ret = nouveau_vma_new(chan->ntfy, chan->chan->vmm,
 386                                       &chan->ntfy_vma);
 387                 if (ret)
 388                         goto done;
 389         }
 390
 391         ret = drm_gem_handle_create(file_priv, &chan->ntfy->bo.base,
 392                                     &init->notifier_handle);
 393         if (ret)
 394                 goto done;
 395
 396         ret = nvkm_mm_init(&chan->heap, 0, 0, PAGE_SIZE, 1);
 397 done:
 398         if (ret)
 399                 nouveau_abi16_chan_fini(abi16, chan);
 400         return nouveau_abi16_put(abi16, ret);
 401 }
 402
 403 static struct nouveau_abi16_chan *
 404 nouveau_abi16_chan(struct nouveau_abi16 *abi16, int channel)
 405 {
 406         struct nouveau_abi16_chan *chan;
 407
 408         list_for_each_entry(chan, &abi16->channels, head) {
 409                 if (chan->chan->chid == channel)
 410                         return chan;
 411         }
 412
 413         return NULL;
 414 }
 415
 416 int
 417 nouveau_abi16_usif(struct drm_file *file_priv, void *data, u32 size)
 418 {
 419         union {
 420                 struct nvif_ioctl_v0 v0;
 421         } *args = data;
 422         struct nouveau_abi16_chan *chan;
 423         struct nouveau_abi16 *abi16;
 424         int ret = -ENOSYS;
 425
 426         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 427                 switch (args->v0.type) {
 428                 case NVIF_IOCTL_V0_NEW:
 429                 case NVIF_IOCTL_V0_MTHD:
 430                 case NVIF_IOCTL_V0_SCLASS:
 431                         break;
 432                 default:
 433                         return -EACCES;
 434                 }
 435         } else
 436                 return ret;
 437
 438         if (!(abi16 = nouveau_abi16(file_priv)))
 439                 return -ENOMEM;
 440
 441         if (args->v0.token != ~0ULL) {
 442                 if (!(chan = nouveau_abi16_chan(abi16, args->v0.token)))
 443                         return -EINVAL;
 444                 args->v0.object = nvif_handle(&chan->chan->user);
 445                 args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
 446                 return 0;
 447         }
 448
 449         args->v0.object = nvif_handle(&abi16->device.object);
 450         args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
 451         return 0;
 452 }
 453
 454 int
 455 nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
 456 {
 457         struct drm_nouveau_channel_free *req = data;
 458         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 459         struct nouveau_abi16_chan *chan;
 460
 461         if (unlikely(!abi16))
 462                 return -ENOMEM;
 463
 464         chan = nouveau_abi16_chan(abi16, req->channel);
 465         if (!chan)
 466                 return nouveau_abi16_put(abi16, -ENOENT);
 467         nouveau_abi16_chan_fini(abi16, chan);
 468         return nouveau_abi16_put(abi16, 0);
 469 }
 470
 471 int
 472 nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
 473 {
 474         struct drm_nouveau_grobj_alloc *init = data;
 475         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 476         struct nouveau_abi16_chan *chan;
 477         struct nouveau_abi16_ntfy *ntfy;
 478         struct nvif_client *client;
 479         struct nvif_sclass *sclass;
 480         s32 oclass = 0;
 481         int ret, i;
 482
 483         if (unlikely(!abi16))
 484                 return -ENOMEM;
 485
 486         if (init->handle == ~0)
 487                 return nouveau_abi16_put(abi16, -EINVAL);
 488         client = abi16->device.object.client;
 489
 490         chan = nouveau_abi16_chan(abi16, init->channel);
 491         if (!chan)
 492                 return nouveau_abi16_put(abi16, -ENOENT);
 493
 494         ret = nvif_object_sclass_get(&chan->chan->user, &sclass);
 495         if (ret < 0)
 496                 return nouveau_abi16_put(abi16, ret);
 497
 498         if ((init->class & 0x00ff) == 0x006e) {
 499                 /* nvsw: compatibility with older 0x*6e class identifier */
 500                 for (i = 0; !oclass && i < ret; i++) {
 501                         switch (sclass[i].oclass) {
 502                         case NVIF_CLASS_SW_NV04:
 503                         case NVIF_CLASS_SW_NV10:
 504                         case NVIF_CLASS_SW_NV50:
 505                         case NVIF_CLASS_SW_GF100:
 506                                 oclass = sclass[i].oclass;
 507                                 break;
 508                         default:
 509                                 break;
 510                         }
 511                 }
 512         } else
 513         if ((init->class & 0x00ff) == 0x00b1) {
 514                 /* msvld: compatibility with incorrect version exposure */
 515                 for (i = 0; i < ret; i++) {
 516                         if ((sclass[i].oclass & 0x00ff) == 0x00b1) {
 517                                 oclass = sclass[i].oclass;
 518                                 break;
 519                         }
 520                 }
 521         } else
 522         if ((init->class & 0x00ff) == 0x00b2) { /* mspdec */
 523                 /* mspdec: compatibility with incorrect version exposure */
 524                 for (i = 0; i < ret; i++) {
 525                         if ((sclass[i].oclass & 0x00ff) == 0x00b2) {
 526                                 oclass = sclass[i].oclass;
 527                                 break;
 528                         }
 529                 }
 530         } else
 531         if ((init->class & 0x00ff) == 0x00b3) { /* msppp */
 532                 /* msppp: compatibility with incorrect version exposure */
 533                 for (i = 0; i < ret; i++) {
 534                         if ((sclass[i].oclass & 0x00ff) == 0x00b3) {
 535                                 oclass = sclass[i].oclass;
 536                                 break;
 537                         }
 538                 }
 539         } else {
 540                 oclass = init->class;
 541         }
 542
 543         nvif_object_sclass_put(&sclass);
 544         if (!oclass)
 545                 return nouveau_abi16_put(abi16, -EINVAL);
 546
 547         ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
 548         if (!ntfy)
 549                 return nouveau_abi16_put(abi16, -ENOMEM);
 550
 551         list_add(&ntfy->head, &chan->notifiers);
 552
 553         client->route = NVDRM_OBJECT_ABI16;
 554         ret = nvif_object_ctor(&chan->chan->user, "abi16EngObj", init->handle,
 555                                oclass, NULL, 0, &ntfy->object);
 556         client->route = NVDRM_OBJECT_NVIF;
 557
 558         if (ret)
 559                 nouveau_abi16_ntfy_fini(chan, ntfy);
 560         return nouveau_abi16_put(abi16, ret);
 561 }
 562
 563 int
 564 nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
 565 {
 566         struct drm_nouveau_notifierobj_alloc *info = data;
 567         struct nouveau_drm *drm = nouveau_drm(dev);
 568         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 569         struct nouveau_abi16_chan *chan;
 570         struct nouveau_abi16_ntfy *ntfy;
 571         struct nvif_device *device = &abi16->device;
 572         struct nvif_client *client;
 573         struct nv_dma_v0 args = {};
 574         int ret;
 575
 576         if (unlikely(!abi16))
 577                 return -ENOMEM;
 578
 579         /* completely unnecessary for these chipsets... */
 580         if (unlikely(device->info.family >= NV_DEVICE_INFO_V0_FERMI))
 581                 return nouveau_abi16_put(abi16, -EINVAL);
 582         client = abi16->device.object.client;
 583
 584         chan = nouveau_abi16_chan(abi16, info->channel);
 585         if (!chan)
 586                 return nouveau_abi16_put(abi16, -ENOENT);
 587
 588         ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
 589         if (!ntfy)
 590                 return nouveau_abi16_put(abi16, -ENOMEM);
 591
 592         list_add(&ntfy->head, &chan->notifiers);
 593
 594         ret = nvkm_mm_head(&chan->heap, 0, 1, info->size, info->size, 1,
 595                            &ntfy->node);
 596         if (ret)
 597                 goto done;
 598
 599         args.start = ntfy->node->offset;
 600         args.limit = ntfy->node->offset + ntfy->node->length - 1;
 601         if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 602                 args.target = NV_DMA_V0_TARGET_VM;
 603                 args.access = NV_DMA_V0_ACCESS_VM;
 604                 args.start += chan->ntfy_vma->addr;
 605                 args.limit += chan->ntfy_vma->addr;
 606         } else
 607         if (drm->agp.bridge) {
 608                 args.target = NV_DMA_V0_TARGET_AGP;
 609                 args.access = NV_DMA_V0_ACCESS_RDWR;
 610                 args.start += drm->agp.base + chan->ntfy->offset;
 611                 args.limit += drm->agp.base + chan->ntfy->offset;
 612         } else {
 613                 args.target = NV_DMA_V0_TARGET_VM;
 614                 args.access = NV_DMA_V0_ACCESS_RDWR;
 615                 args.start += chan->ntfy->offset;
 616                 args.limit += chan->ntfy->offset;
 617         }
 618
 619         client->route = NVDRM_OBJECT_ABI16;
 620         ret = nvif_object_ctor(&chan->chan->user, "abi16Ntfy", info->handle,
 621                                NV_DMA_IN_MEMORY, &args, sizeof(args),
 622                                &ntfy->object);
 623         client->route = NVDRM_OBJECT_NVIF;
 624         if (ret)
 625                 goto done;
 626
 627         info->offset = ntfy->node->offset;
 628 done:
 629         if (ret)
 630                 nouveau_abi16_ntfy_fini(chan, ntfy);
 631         return nouveau_abi16_put(abi16, ret);
 632 }
 633
 634 int
 635 nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
 636 {
 637         struct drm_nouveau_gpuobj_free *fini = data;
 638         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 639         struct nouveau_abi16_chan *chan;
 640         struct nouveau_abi16_ntfy *ntfy;
 641         int ret = -ENOENT;
 642
 643         if (unlikely(!abi16))
 644                 return -ENOMEM;
 645
 646         chan = nouveau_abi16_chan(abi16, fini->channel);
 647         if (!chan)
 648                 return nouveau_abi16_put(abi16, -EINVAL);
 649
 650         /* synchronize with the user channel and destroy the gpu object */
 651         nouveau_channel_idle(chan->chan);
 652
 653         list_for_each_entry(ntfy, &chan->notifiers, head) {
 654                 if (ntfy->object.handle == fini->handle) {
 655                         nouveau_abi16_ntfy_fini(chan, ntfy);
 656                         ret = 0;
 657                         break;
 658                 }
 659         }
 660
 661         return nouveau_abi16_put(abi16, ret);
 662 }