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/ioctl.h>
  27 #include <nvif/class.h>
  28 #include <nvif/cl0002.h>
  29 #include <nvif/cla06f.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
  38 static struct nouveau_abi16 *
  39 nouveau_abi16(struct drm_file *file_priv)
  40 {
  41         struct nouveau_cli *cli = nouveau_cli(file_priv);
  42         if (!cli->abi16) {
  43                 struct nouveau_abi16 *abi16;
  44                 cli->abi16 = abi16 = kzalloc(sizeof(*abi16), GFP_KERNEL);
  45                 if (cli->abi16) {
  46                         struct nv_device_v0 args = {
  47                                 .device = ~0ULL,
  48                         };
  49
  50                         INIT_LIST_HEAD(&abi16->channels);
  51
  52                         /* allocate device object targeting client's default
  53                          * device (ie. the one that belongs to the fd it
  54                          * opened)
  55                          */
  56                         if (nvif_device_init(&cli->base.object, 0, NV_DEVICE,
  57                                              &args, sizeof(args),
  58                                              &abi16->device) == 0)
  59                                 return cli->abi16;
  60
  61                         kfree(cli->abi16);
  62                         cli->abi16 = NULL;
  63                 }
  64         }
  65         return cli->abi16;
  66 }
  67
  68 struct nouveau_abi16 *
  69 nouveau_abi16_get(struct drm_file *file_priv)
  70 {
  71         struct nouveau_cli *cli = nouveau_cli(file_priv);
  72         mutex_lock(&cli->mutex);
  73         if (nouveau_abi16(file_priv))
  74                 return cli->abi16;
  75         mutex_unlock(&cli->mutex);
  76         return NULL;
  77 }
  78
  79 int
  80 nouveau_abi16_put(struct nouveau_abi16 *abi16, int ret)
  81 {
  82         struct nouveau_cli *cli = (void *)abi16->device.object.client;
  83         mutex_unlock(&cli->mutex);
  84         return ret;
  85 }
  86
  87 s32
  88 nouveau_abi16_swclass(struct nouveau_drm *drm)
  89 {
  90         switch (drm->device.info.family) {
  91         case NV_DEVICE_INFO_V0_TNT:
  92                 return NVIF_CLASS_SW_NV04;
  93         case NV_DEVICE_INFO_V0_CELSIUS:
  94         case NV_DEVICE_INFO_V0_KELVIN:
  95         case NV_DEVICE_INFO_V0_RANKINE:
  96         case NV_DEVICE_INFO_V0_CURIE:
  97                 return NVIF_CLASS_SW_NV10;
  98         case NV_DEVICE_INFO_V0_TESLA:
  99                 return NVIF_CLASS_SW_NV50;
 100         case NV_DEVICE_INFO_V0_FERMI:
 101         case NV_DEVICE_INFO_V0_KEPLER:
 102         case NV_DEVICE_INFO_V0_MAXWELL:
 103                 return NVIF_CLASS_SW_GF100;
 104         }
 105
 106         return 0x0000;
 107 }
 108
 109 static void
 110 nouveau_abi16_ntfy_fini(struct nouveau_abi16_chan *chan,
 111                         struct nouveau_abi16_ntfy *ntfy)
 112 {
 113         nvif_object_fini(&ntfy->object);
 114         nvkm_mm_free(&chan->heap, &ntfy->node);
 115         list_del(&ntfy->head);
 116         kfree(ntfy);
 117 }
 118
 119 static void
 120 nouveau_abi16_chan_fini(struct nouveau_abi16 *abi16,
 121                         struct nouveau_abi16_chan *chan)
 122 {
 123         struct nouveau_abi16_ntfy *ntfy, *temp;
 124
 125         /* wait for all activity to stop before releasing notify object, which
 126          * may be still in use */
 127         if (chan->chan && chan->ntfy)
 128                 nouveau_channel_idle(chan->chan);
 129
 130         /* cleanup notifier state */
 131         list_for_each_entry_safe(ntfy, temp, &chan->notifiers, head) {
 132                 nouveau_abi16_ntfy_fini(chan, ntfy);
 133         }
 134
 135         if (chan->ntfy) {
 136                 nouveau_bo_vma_del(chan->ntfy, &chan->ntfy_vma);
 137                 nouveau_bo_unpin(chan->ntfy);
 138                 drm_gem_object_unreference_unlocked(&chan->ntfy->gem);
 139         }
 140
 141         if (chan->heap.block_size)
 142                 nvkm_mm_fini(&chan->heap);
 143
 144         /* destroy channel object, all children will be killed too */
 145         if (chan->chan) {
 146                 nouveau_channel_idle(chan->chan);
 147                 nouveau_channel_del(&chan->chan);
 148         }
 149
 150         list_del(&chan->head);
 151         kfree(chan);
 152 }
 153
 154 void
 155 nouveau_abi16_fini(struct nouveau_abi16 *abi16)
 156 {
 157         struct nouveau_cli *cli = (void *)abi16->device.object.client;
 158         struct nouveau_abi16_chan *chan, *temp;
 159
 160         /* cleanup channels */
 161         list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
 162                 nouveau_abi16_chan_fini(abi16, chan);
 163         }
 164
 165         /* destroy the device object */
 166         nvif_device_fini(&abi16->device);
 167
 168         kfree(cli->abi16);
 169         cli->abi16 = NULL;
 170 }
 171
 172 int
 173 nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
 174 {
 175         struct nouveau_cli *cli = nouveau_cli(file_priv);
 176         struct nouveau_drm *drm = nouveau_drm(dev);
 177         struct nvif_device *device = &drm->device;
 178         struct nvkm_gr *gr = nvxx_gr(device);
 179         struct drm_nouveau_getparam *getparam = data;
 180
 181         switch (getparam->param) {
 182         case NOUVEAU_GETPARAM_CHIPSET_ID:
 183                 getparam->value = device->info.chipset;
 184                 break;
 185         case NOUVEAU_GETPARAM_PCI_VENDOR:
 186                 if (nvxx_device(device)->func->pci)
 187                         getparam->value = dev->pdev->vendor;
 188                 else
 189                         getparam->value = 0;
 190                 break;
 191         case NOUVEAU_GETPARAM_PCI_DEVICE:
 192                 if (nvxx_device(device)->func->pci)
 193                         getparam->value = dev->pdev->device;
 194                 else
 195                         getparam->value = 0;
 196                 break;
 197         case NOUVEAU_GETPARAM_BUS_TYPE:
 198                 if (!nvxx_device(device)->func->pci)
 199                         getparam->value = 3;
 200                 else
 201                 if (drm_pci_device_is_agp(dev))
 202                         getparam->value = 0;
 203                 else
 204                 if (!pci_is_pcie(dev->pdev))
 205                         getparam->value = 1;
 206                 else
 207                         getparam->value = 2;
 208                 break;
 209         case NOUVEAU_GETPARAM_FB_SIZE:
 210                 getparam->value = drm->gem.vram_available;
 211                 break;
 212         case NOUVEAU_GETPARAM_AGP_SIZE:
 213                 getparam->value = drm->gem.gart_available;
 214                 break;
 215         case NOUVEAU_GETPARAM_VM_VRAM_BASE:
 216                 getparam->value = 0; /* deprecated */
 217                 break;
 218         case NOUVEAU_GETPARAM_PTIMER_TIME:
 219                 getparam->value = nvif_device_time(device);
 220                 break;
 221         case NOUVEAU_GETPARAM_HAS_BO_USAGE:
 222                 getparam->value = 1;
 223                 break;
 224         case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
 225                 getparam->value = 1;
 226                 break;
 227         case NOUVEAU_GETPARAM_GRAPH_UNITS:
 228                 getparam->value = nvkm_gr_units(gr);
 229                 break;
 230         default:
 231                 NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);
 232                 return -EINVAL;
 233         }
 234
 235         return 0;
 236 }
 237
 238 int
 239 nouveau_abi16_ioctl_setparam(ABI16_IOCTL_ARGS)
 240 {
 241         return -EINVAL;
 242 }
 243
 244 int
 245 nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
 246 {
 247         struct drm_nouveau_channel_alloc *init = data;
 248         struct nouveau_cli *cli = nouveau_cli(file_priv);
 249         struct nouveau_drm *drm = nouveau_drm(dev);
 250         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 251         struct nouveau_abi16_chan *chan;
 252         struct nvif_device *device;
 253         int ret;
 254
 255         if (unlikely(!abi16))
 256                 return -ENOMEM;
 257
 258         if (!drm->channel)
 259                 return nouveau_abi16_put(abi16, -ENODEV);
 260
 261         device = &abi16->device;
 262
 263         /* hack to allow channel engine type specification on kepler */
 264         if (device->info.family >= NV_DEVICE_INFO_V0_KEPLER) {
 265                 if (init->fb_ctxdma_handle != ~0)
 266                         init->fb_ctxdma_handle = NVA06F_V0_ENGINE_GR;
 267                 else {
 268                         init->fb_ctxdma_handle = 0;
 269 #define _(A,B) if (init->tt_ctxdma_handle & (A)) init->fb_ctxdma_handle |= (B)
 270                         _(0x01, NVA06F_V0_ENGINE_GR);
 271                         _(0x02, NVA06F_V0_ENGINE_MSPDEC);
 272                         _(0x04, NVA06F_V0_ENGINE_MSPPP);
 273                         _(0x08, NVA06F_V0_ENGINE_MSVLD);
 274                         _(0x10, NVA06F_V0_ENGINE_CE0);
 275                         _(0x20, NVA06F_V0_ENGINE_CE1);
 276                         _(0x40, NVA06F_V0_ENGINE_MSENC);
 277 #undef _
 278                 }
 279
 280                 /* allow flips to be executed if this is a graphics channel */
 281                 init->tt_ctxdma_handle = 0;
 282                 if (init->fb_ctxdma_handle == NVA06F_V0_ENGINE_GR)
 283                         init->tt_ctxdma_handle = 1;
 284         }
 285
 286         if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
 287                 return nouveau_abi16_put(abi16, -EINVAL);
 288
 289         /* allocate "abi16 channel" data and make up a handle for it */
 290         chan = kzalloc(sizeof(*chan), GFP_KERNEL);
 291         if (!chan)
 292                 return nouveau_abi16_put(abi16, -ENOMEM);
 293
 294         INIT_LIST_HEAD(&chan->notifiers);
 295         list_add(&chan->head, &abi16->channels);
 296
 297         /* create channel object and initialise dma and fence management */
 298         ret = nouveau_channel_new(drm, device, init->fb_ctxdma_handle,
 299                                   init->tt_ctxdma_handle, &chan->chan);
 300         if (ret)
 301                 goto done;
 302
 303         init->channel = chan->chan->chid;
 304
 305         if (device->info.family >= NV_DEVICE_INFO_V0_TESLA)
 306                 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
 307                                         NOUVEAU_GEM_DOMAIN_GART;
 308         else
 309         if (chan->chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM)
 310                 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
 311         else
 312                 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
 313
 314         if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
 315                 init->subchan[0].handle = 0x00000000;
 316                 init->subchan[0].grclass = 0x0000;
 317                 init->subchan[1].handle = chan->chan->nvsw.handle;
 318                 init->subchan[1].grclass = 0x506e;
 319                 init->nr_subchan = 2;
 320         }
 321
 322         /* Named memory object area */
 323         ret = nouveau_gem_new(dev, PAGE_SIZE, 0, NOUVEAU_GEM_DOMAIN_GART,
 324                               0, 0, &chan->ntfy);
 325         if (ret == 0)
 326                 ret = nouveau_bo_pin(chan->ntfy, TTM_PL_FLAG_TT, false);
 327         if (ret)
 328                 goto done;
 329
 330         if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 331                 ret = nouveau_bo_vma_add(chan->ntfy, cli->vm,
 332                                         &chan->ntfy_vma);
 333                 if (ret)
 334                         goto done;
 335         }
 336
 337         ret = drm_gem_handle_create(file_priv, &chan->ntfy->gem,
 338                                     &init->notifier_handle);
 339         if (ret)
 340                 goto done;
 341
 342         ret = nvkm_mm_init(&chan->heap, 0, PAGE_SIZE, 1);
 343 done:
 344         if (ret)
 345                 nouveau_abi16_chan_fini(abi16, chan);
 346         return nouveau_abi16_put(abi16, ret);
 347 }
 348
 349 static struct nouveau_abi16_chan *
 350 nouveau_abi16_chan(struct nouveau_abi16 *abi16, int channel)
 351 {
 352         struct nouveau_abi16_chan *chan;
 353
 354         list_for_each_entry(chan, &abi16->channels, head) {
 355                 if (chan->chan->chid == channel)
 356                         return chan;
 357         }
 358
 359         return NULL;
 360 }
 361
 362 int
 363 nouveau_abi16_usif(struct drm_file *file_priv, void *data, u32 size)
 364 {
 365         union {
 366                 struct nvif_ioctl_v0 v0;
 367         } *args = data;
 368         struct nouveau_abi16_chan *chan;
 369         struct nouveau_abi16 *abi16;
 370         int ret = -ENOSYS;
 371
 372         if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 373                 switch (args->v0.type) {
 374                 case NVIF_IOCTL_V0_NEW:
 375                 case NVIF_IOCTL_V0_MTHD:
 376                 case NVIF_IOCTL_V0_SCLASS:
 377                         break;
 378                 default:
 379                         return -EACCES;
 380                 }
 381         } else
 382                 return ret;
 383
 384         if (!(abi16 = nouveau_abi16(file_priv)))
 385                 return -ENOMEM;
 386
 387         if (args->v0.token != ~0ULL) {
 388                 if (!(chan = nouveau_abi16_chan(abi16, args->v0.token)))
 389                         return -EINVAL;
 390                 args->v0.object = nvif_handle(&chan->chan->user);
 391                 args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
 392                 return 0;
 393         }
 394
 395         args->v0.object = nvif_handle(&abi16->device.object);
 396         args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
 397         return 0;
 398 }
 399
 400 int
 401 nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
 402 {
 403         struct drm_nouveau_channel_free *req = data;
 404         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 405         struct nouveau_abi16_chan *chan;
 406
 407         if (unlikely(!abi16))
 408                 return -ENOMEM;
 409
 410         chan = nouveau_abi16_chan(abi16, req->channel);
 411         if (!chan)
 412                 return nouveau_abi16_put(abi16, -ENOENT);
 413         nouveau_abi16_chan_fini(abi16, chan);
 414         return nouveau_abi16_put(abi16, 0);
 415 }
 416
 417 int
 418 nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
 419 {
 420         struct drm_nouveau_grobj_alloc *init = data;
 421         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 422         struct nouveau_abi16_chan *chan;
 423         struct nouveau_abi16_ntfy *ntfy;
 424         struct nvif_client *client;
 425         struct nvif_sclass *sclass;
 426         s32 oclass = 0;
 427         int ret, i;
 428
 429         if (unlikely(!abi16))
 430                 return -ENOMEM;
 431
 432         if (init->handle == ~0)
 433                 return nouveau_abi16_put(abi16, -EINVAL);
 434         client = abi16->device.object.client;
 435
 436         chan = nouveau_abi16_chan(abi16, init->channel);
 437         if (!chan)
 438                 return nouveau_abi16_put(abi16, -ENOENT);
 439
 440         ret = nvif_object_sclass_get(&chan->chan->user, &sclass);
 441         if (ret < 0)
 442                 return nouveau_abi16_put(abi16, ret);
 443
 444         if ((init->class & 0x00ff) == 0x006e) {
 445                 /* nvsw: compatibility with older 0x*6e class identifier */
 446                 for (i = 0; !oclass && i < ret; i++) {
 447                         switch (sclass[i].oclass) {
 448                         case NVIF_CLASS_SW_NV04:
 449                         case NVIF_CLASS_SW_NV10:
 450                         case NVIF_CLASS_SW_NV50:
 451                         case NVIF_CLASS_SW_GF100:
 452                                 oclass = sclass[i].oclass;
 453                                 break;
 454                         default:
 455                                 break;
 456                         }
 457                 }
 458         } else
 459         if ((init->class & 0x00ff) == 0x00b1) {
 460                 /* msvld: compatibility with incorrect version exposure */
 461                 for (i = 0; i < ret; i++) {
 462                         if ((sclass[i].oclass & 0x00ff) == 0x00b1) {
 463                                 oclass = sclass[i].oclass;
 464                                 break;
 465                         }
 466                 }
 467         } else
 468         if ((init->class & 0x00ff) == 0x00b2) { /* mspdec */
 469                 /* mspdec: compatibility with incorrect version exposure */
 470                 for (i = 0; i < ret; i++) {
 471                         if ((sclass[i].oclass & 0x00ff) == 0x00b2) {
 472                                 oclass = sclass[i].oclass;
 473                                 break;
 474                         }
 475                 }
 476         } else
 477         if ((init->class & 0x00ff) == 0x00b3) { /* msppp */
 478                 /* msppp: compatibility with incorrect version exposure */
 479                 for (i = 0; i < ret; i++) {
 480                         if ((sclass[i].oclass & 0x00ff) == 0x00b3) {
 481                                 oclass = sclass[i].oclass;
 482                                 break;
 483                         }
 484                 }
 485         } else {
 486                 oclass = init->class;
 487         }
 488
 489         nvif_object_sclass_put(&sclass);
 490         if (!oclass)
 491                 return nouveau_abi16_put(abi16, -EINVAL);
 492
 493         ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
 494         if (!ntfy)
 495                 return nouveau_abi16_put(abi16, -ENOMEM);
 496
 497         list_add(&ntfy->head, &chan->notifiers);
 498
 499         client->route = NVDRM_OBJECT_ABI16;
 500         ret = nvif_object_init(&chan->chan->user, init->handle, oclass,
 501                                NULL, 0, &ntfy->object);
 502         client->route = NVDRM_OBJECT_NVIF;
 503
 504         if (ret)
 505                 nouveau_abi16_ntfy_fini(chan, ntfy);
 506         return nouveau_abi16_put(abi16, ret);
 507 }
 508
 509 int
 510 nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
 511 {
 512         struct drm_nouveau_notifierobj_alloc *info = data;
 513         struct nouveau_drm *drm = nouveau_drm(dev);
 514         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 515         struct nouveau_abi16_chan *chan;
 516         struct nouveau_abi16_ntfy *ntfy;
 517         struct nvif_device *device = &abi16->device;
 518         struct nvif_client *client;
 519         struct nv_dma_v0 args = {};
 520         int ret;
 521
 522         if (unlikely(!abi16))
 523                 return -ENOMEM;
 524
 525         /* completely unnecessary for these chipsets... */
 526         if (unlikely(device->info.family >= NV_DEVICE_INFO_V0_FERMI))
 527                 return nouveau_abi16_put(abi16, -EINVAL);
 528         client = abi16->device.object.client;
 529
 530         chan = nouveau_abi16_chan(abi16, info->channel);
 531         if (!chan)
 532                 return nouveau_abi16_put(abi16, -ENOENT);
 533
 534         ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
 535         if (!ntfy)
 536                 return nouveau_abi16_put(abi16, -ENOMEM);
 537
 538         list_add(&ntfy->head, &chan->notifiers);
 539
 540         ret = nvkm_mm_head(&chan->heap, 0, 1, info->size, info->size, 1,
 541                            &ntfy->node);
 542         if (ret)
 543                 goto done;
 544
 545         args.start = ntfy->node->offset;
 546         args.limit = ntfy->node->offset + ntfy->node->length - 1;
 547         if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 548                 args.target = NV_DMA_V0_TARGET_VM;
 549                 args.access = NV_DMA_V0_ACCESS_VM;
 550                 args.start += chan->ntfy_vma.offset;
 551                 args.limit += chan->ntfy_vma.offset;
 552         } else
 553         if (drm->agp.bridge) {
 554                 args.target = NV_DMA_V0_TARGET_AGP;
 555                 args.access = NV_DMA_V0_ACCESS_RDWR;
 556                 args.start += drm->agp.base + chan->ntfy->bo.offset;
 557                 args.limit += drm->agp.base + chan->ntfy->bo.offset;
 558         } else {
 559                 args.target = NV_DMA_V0_TARGET_VM;
 560                 args.access = NV_DMA_V0_ACCESS_RDWR;
 561                 args.start += chan->ntfy->bo.offset;
 562                 args.limit += chan->ntfy->bo.offset;
 563         }
 564
 565         client->route = NVDRM_OBJECT_ABI16;
 566         client->super = true;
 567         ret = nvif_object_init(&chan->chan->user, info->handle,
 568                                NV_DMA_IN_MEMORY, &args, sizeof(args),
 569                                &ntfy->object);
 570         client->super = false;
 571         client->route = NVDRM_OBJECT_NVIF;
 572         if (ret)
 573                 goto done;
 574
 575         info->offset = ntfy->node->offset;
 576 done:
 577         if (ret)
 578                 nouveau_abi16_ntfy_fini(chan, ntfy);
 579         return nouveau_abi16_put(abi16, ret);
 580 }
 581
 582 int
 583 nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
 584 {
 585         struct drm_nouveau_gpuobj_free *fini = data;
 586         struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 587         struct nouveau_abi16_chan *chan;
 588         struct nouveau_abi16_ntfy *ntfy;
 589         int ret = -ENOENT;
 590
 591         if (unlikely(!abi16))
 592                 return -ENOMEM;
 593
 594         chan = nouveau_abi16_chan(abi16, fini->channel);
 595         if (!chan)
 596                 return nouveau_abi16_put(abi16, -EINVAL);
 597
 598         /* synchronize with the user channel and destroy the gpu object */
 599         nouveau_channel_idle(chan->chan);
 600
 601         list_for_each_entry(ntfy, &chan->notifiers, head) {
 602                 if (ntfy->object.handle == fini->handle) {
 603                         nouveau_abi16_ntfy_fini(chan, ntfy);
 604                         ret = 0;
 605                         break;
 606                 }
 607         }
 608
 609         return nouveau_abi16_put(abi16, ret);
 610 }