linux/drivers/gpu/drm/nouveau/nouveau_abi16.c
<<
>>
Prefs
   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/cla06f.h>
  31#include <nvif/unpack.h>
  32
  33#include "nouveau_drv.h"
  34#include "nouveau_dma.h"
  35#include "nouveau_gem.h"
  36#include "nouveau_chan.h"
  37#include "nouveau_abi16.h"
  38#include "nouveau_vmm.h"
  39
  40static struct nouveau_abi16 *
  41nouveau_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_init(&cli->base.object, 0, NV_DEVICE,
  59                                             &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
  70struct nouveau_abi16 *
  71nouveau_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
  81int
  82nouveau_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
  89s32
  90nouveau_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
 113static void
 114nouveau_abi16_ntfy_fini(struct nouveau_abi16_chan *chan,
 115                        struct nouveau_abi16_ntfy *ntfy)
 116{
 117        nvif_object_fini(&ntfy->object);
 118        nvkm_mm_free(&chan->heap, &ntfy->node);
 119        list_del(&ntfy->head);
 120        kfree(ntfy);
 121}
 122
 123static void
 124nouveau_abi16_chan_fini(struct nouveau_abi16 *abi16,
 125                        struct nouveau_abi16_chan *chan)
 126{
 127        struct nouveau_abi16_ntfy *ntfy, *temp;
 128
 129        /* wait for all activity to stop before releasing notify object, which
 130         * may be still in use */
 131        if (chan->chan && chan->ntfy)
 132                nouveau_channel_idle(chan->chan);
 133
 134        /* cleanup notifier state */
 135        list_for_each_entry_safe(ntfy, temp, &chan->notifiers, head) {
 136                nouveau_abi16_ntfy_fini(chan, ntfy);
 137        }
 138
 139        if (chan->ntfy) {
 140                nouveau_vma_del(&chan->ntfy_vma);
 141                nouveau_bo_unpin(chan->ntfy);
 142                drm_gem_object_put_unlocked(&chan->ntfy->gem);
 143        }
 144
 145        if (chan->heap.block_size)
 146                nvkm_mm_fini(&chan->heap);
 147
 148        /* destroy channel object, all children will be killed too */
 149        if (chan->chan) {
 150                nouveau_channel_idle(chan->chan);
 151                nouveau_channel_del(&chan->chan);
 152        }
 153
 154        list_del(&chan->head);
 155        kfree(chan);
 156}
 157
 158void
 159nouveau_abi16_fini(struct nouveau_abi16 *abi16)
 160{
 161        struct nouveau_cli *cli = (void *)abi16->device.object.client;
 162        struct nouveau_abi16_chan *chan, *temp;
 163
 164        /* cleanup channels */
 165        list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
 166                nouveau_abi16_chan_fini(abi16, chan);
 167        }
 168
 169        /* destroy the device object */
 170        nvif_device_fini(&abi16->device);
 171
 172        kfree(cli->abi16);
 173        cli->abi16 = NULL;
 174}
 175
 176int
 177nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
 178{
 179        struct nouveau_cli *cli = nouveau_cli(file_priv);
 180        struct nouveau_drm *drm = nouveau_drm(dev);
 181        struct nvif_device *device = &drm->client.device;
 182        struct nvkm_gr *gr = nvxx_gr(device);
 183        struct drm_nouveau_getparam *getparam = data;
 184
 185        switch (getparam->param) {
 186        case NOUVEAU_GETPARAM_CHIPSET_ID:
 187                getparam->value = device->info.chipset;
 188                break;
 189        case NOUVEAU_GETPARAM_PCI_VENDOR:
 190                if (device->info.platform != NV_DEVICE_INFO_V0_SOC)
 191                        getparam->value = dev->pdev->vendor;
 192                else
 193                        getparam->value = 0;
 194                break;
 195        case NOUVEAU_GETPARAM_PCI_DEVICE:
 196                if (device->info.platform != NV_DEVICE_INFO_V0_SOC)
 197                        getparam->value = dev->pdev->device;
 198                else
 199                        getparam->value = 0;
 200                break;
 201        case NOUVEAU_GETPARAM_BUS_TYPE:
 202                switch (device->info.platform) {
 203                case NV_DEVICE_INFO_V0_AGP : getparam->value = 0; break;
 204                case NV_DEVICE_INFO_V0_PCI : getparam->value = 1; break;
 205                case NV_DEVICE_INFO_V0_PCIE: getparam->value = 2; break;
 206                case NV_DEVICE_INFO_V0_SOC : getparam->value = 3; break;
 207                case NV_DEVICE_INFO_V0_IGP :
 208                        if (!pci_is_pcie(dev->pdev))
 209                                getparam->value = 1;
 210                        else
 211                                getparam->value = 2;
 212                        break;
 213                default:
 214                        WARN_ON(1);
 215                        break;
 216                }
 217        case NOUVEAU_GETPARAM_FB_SIZE:
 218                getparam->value = drm->gem.vram_available;
 219                break;
 220        case NOUVEAU_GETPARAM_AGP_SIZE:
 221                getparam->value = drm->gem.gart_available;
 222                break;
 223        case NOUVEAU_GETPARAM_VM_VRAM_BASE:
 224                getparam->value = 0; /* deprecated */
 225                break;
 226        case NOUVEAU_GETPARAM_PTIMER_TIME:
 227                getparam->value = nvif_device_time(device);
 228                break;
 229        case NOUVEAU_GETPARAM_HAS_BO_USAGE:
 230                getparam->value = 1;
 231                break;
 232        case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
 233                getparam->value = 1;
 234                break;
 235        case NOUVEAU_GETPARAM_GRAPH_UNITS:
 236                getparam->value = nvkm_gr_units(gr);
 237                break;
 238        default:
 239                NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);
 240                return -EINVAL;
 241        }
 242
 243        return 0;
 244}
 245
 246int
 247nouveau_abi16_ioctl_setparam(ABI16_IOCTL_ARGS)
 248{
 249        return -EINVAL;
 250}
 251
 252int
 253nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
 254{
 255        struct drm_nouveau_channel_alloc *init = data;
 256        struct nouveau_cli *cli = nouveau_cli(file_priv);
 257        struct nouveau_drm *drm = nouveau_drm(dev);
 258        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 259        struct nouveau_abi16_chan *chan;
 260        struct nvif_device *device;
 261        u64 engine;
 262        int ret;
 263
 264        if (unlikely(!abi16))
 265                return -ENOMEM;
 266
 267        if (!drm->channel)
 268                return nouveau_abi16_put(abi16, -ENODEV);
 269
 270        device = &abi16->device;
 271
 272        /* hack to allow channel engine type specification on kepler */
 273        if (device->info.family >= NV_DEVICE_INFO_V0_KEPLER) {
 274                if (init->fb_ctxdma_handle == ~0) {
 275                        switch (init->tt_ctxdma_handle) {
 276                        case 0x01: engine = NV_DEVICE_INFO_ENGINE_GR    ; break;
 277                        case 0x02: engine = NV_DEVICE_INFO_ENGINE_MSPDEC; break;
 278                        case 0x04: engine = NV_DEVICE_INFO_ENGINE_MSPPP ; break;
 279                        case 0x08: engine = NV_DEVICE_INFO_ENGINE_MSVLD ; break;
 280                        case 0x30: engine = NV_DEVICE_INFO_ENGINE_CE    ; break;
 281                        default:
 282                                return nouveau_abi16_put(abi16, -ENOSYS);
 283                        }
 284                } else {
 285                        engine = NV_DEVICE_INFO_ENGINE_GR;
 286                }
 287
 288                if (engine != NV_DEVICE_INFO_ENGINE_CE)
 289                        engine = nvif_fifo_runlist(device, engine);
 290                else
 291                        engine = nvif_fifo_runlist_ce(device);
 292                init->fb_ctxdma_handle = engine;
 293                init->tt_ctxdma_handle = 0;
 294        }
 295
 296        if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
 297                return nouveau_abi16_put(abi16, -EINVAL);
 298
 299        /* allocate "abi16 channel" data and make up a handle for it */
 300        chan = kzalloc(sizeof(*chan), GFP_KERNEL);
 301        if (!chan)
 302                return nouveau_abi16_put(abi16, -ENOMEM);
 303
 304        INIT_LIST_HEAD(&chan->notifiers);
 305        list_add(&chan->head, &abi16->channels);
 306
 307        /* create channel object and initialise dma and fence management */
 308        ret = nouveau_channel_new(drm, device, init->fb_ctxdma_handle,
 309                                  init->tt_ctxdma_handle, false, &chan->chan);
 310        if (ret)
 311                goto done;
 312
 313        init->channel = chan->chan->chid;
 314
 315        if (device->info.family >= NV_DEVICE_INFO_V0_TESLA)
 316                init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
 317                                        NOUVEAU_GEM_DOMAIN_GART;
 318        else
 319        if (chan->chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM)
 320                init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
 321        else
 322                init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
 323
 324        if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
 325                init->subchan[0].handle = 0x00000000;
 326                init->subchan[0].grclass = 0x0000;
 327                init->subchan[1].handle = chan->chan->nvsw.handle;
 328                init->subchan[1].grclass = 0x506e;
 329                init->nr_subchan = 2;
 330        }
 331
 332        /* Named memory object area */
 333        ret = nouveau_gem_new(cli, PAGE_SIZE, 0, NOUVEAU_GEM_DOMAIN_GART,
 334                              0, 0, &chan->ntfy);
 335        if (ret == 0)
 336                ret = nouveau_bo_pin(chan->ntfy, TTM_PL_FLAG_TT, false);
 337        if (ret)
 338                goto done;
 339
 340        if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 341                ret = nouveau_vma_new(chan->ntfy, &cli->vmm, &chan->ntfy_vma);
 342                if (ret)
 343                        goto done;
 344        }
 345
 346        ret = drm_gem_handle_create(file_priv, &chan->ntfy->gem,
 347                                    &init->notifier_handle);
 348        if (ret)
 349                goto done;
 350
 351        ret = nvkm_mm_init(&chan->heap, 0, 0, PAGE_SIZE, 1);
 352done:
 353        if (ret)
 354                nouveau_abi16_chan_fini(abi16, chan);
 355        return nouveau_abi16_put(abi16, ret);
 356}
 357
 358static struct nouveau_abi16_chan *
 359nouveau_abi16_chan(struct nouveau_abi16 *abi16, int channel)
 360{
 361        struct nouveau_abi16_chan *chan;
 362
 363        list_for_each_entry(chan, &abi16->channels, head) {
 364                if (chan->chan->chid == channel)
 365                        return chan;
 366        }
 367
 368        return NULL;
 369}
 370
 371int
 372nouveau_abi16_usif(struct drm_file *file_priv, void *data, u32 size)
 373{
 374        union {
 375                struct nvif_ioctl_v0 v0;
 376        } *args = data;
 377        struct nouveau_abi16_chan *chan;
 378        struct nouveau_abi16 *abi16;
 379        int ret = -ENOSYS;
 380
 381        if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 382                switch (args->v0.type) {
 383                case NVIF_IOCTL_V0_NEW:
 384                case NVIF_IOCTL_V0_MTHD:
 385                case NVIF_IOCTL_V0_SCLASS:
 386                        break;
 387                default:
 388                        return -EACCES;
 389                }
 390        } else
 391                return ret;
 392
 393        if (!(abi16 = nouveau_abi16(file_priv)))
 394                return -ENOMEM;
 395
 396        if (args->v0.token != ~0ULL) {
 397                if (!(chan = nouveau_abi16_chan(abi16, args->v0.token)))
 398                        return -EINVAL;
 399                args->v0.object = nvif_handle(&chan->chan->user);
 400                args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
 401                return 0;
 402        }
 403
 404        args->v0.object = nvif_handle(&abi16->device.object);
 405        args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
 406        return 0;
 407}
 408
 409int
 410nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
 411{
 412        struct drm_nouveau_channel_free *req = data;
 413        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 414        struct nouveau_abi16_chan *chan;
 415
 416        if (unlikely(!abi16))
 417                return -ENOMEM;
 418
 419        chan = nouveau_abi16_chan(abi16, req->channel);
 420        if (!chan)
 421                return nouveau_abi16_put(abi16, -ENOENT);
 422        nouveau_abi16_chan_fini(abi16, chan);
 423        return nouveau_abi16_put(abi16, 0);
 424}
 425
 426int
 427nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
 428{
 429        struct drm_nouveau_grobj_alloc *init = data;
 430        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 431        struct nouveau_abi16_chan *chan;
 432        struct nouveau_abi16_ntfy *ntfy;
 433        struct nvif_client *client;
 434        struct nvif_sclass *sclass;
 435        s32 oclass = 0;
 436        int ret, i;
 437
 438        if (unlikely(!abi16))
 439                return -ENOMEM;
 440
 441        if (init->handle == ~0)
 442                return nouveau_abi16_put(abi16, -EINVAL);
 443        client = abi16->device.object.client;
 444
 445        chan = nouveau_abi16_chan(abi16, init->channel);
 446        if (!chan)
 447                return nouveau_abi16_put(abi16, -ENOENT);
 448
 449        ret = nvif_object_sclass_get(&chan->chan->user, &sclass);
 450        if (ret < 0)
 451                return nouveau_abi16_put(abi16, ret);
 452
 453        if ((init->class & 0x00ff) == 0x006e) {
 454                /* nvsw: compatibility with older 0x*6e class identifier */
 455                for (i = 0; !oclass && i < ret; i++) {
 456                        switch (sclass[i].oclass) {
 457                        case NVIF_CLASS_SW_NV04:
 458                        case NVIF_CLASS_SW_NV10:
 459                        case NVIF_CLASS_SW_NV50:
 460                        case NVIF_CLASS_SW_GF100:
 461                                oclass = sclass[i].oclass;
 462                                break;
 463                        default:
 464                                break;
 465                        }
 466                }
 467        } else
 468        if ((init->class & 0x00ff) == 0x00b1) {
 469                /* msvld: compatibility with incorrect version exposure */
 470                for (i = 0; i < ret; i++) {
 471                        if ((sclass[i].oclass & 0x00ff) == 0x00b1) {
 472                                oclass = sclass[i].oclass;
 473                                break;
 474                        }
 475                }
 476        } else
 477        if ((init->class & 0x00ff) == 0x00b2) { /* mspdec */
 478                /* mspdec: compatibility with incorrect version exposure */
 479                for (i = 0; i < ret; i++) {
 480                        if ((sclass[i].oclass & 0x00ff) == 0x00b2) {
 481                                oclass = sclass[i].oclass;
 482                                break;
 483                        }
 484                }
 485        } else
 486        if ((init->class & 0x00ff) == 0x00b3) { /* msppp */
 487                /* msppp: compatibility with incorrect version exposure */
 488                for (i = 0; i < ret; i++) {
 489                        if ((sclass[i].oclass & 0x00ff) == 0x00b3) {
 490                                oclass = sclass[i].oclass;
 491                                break;
 492                        }
 493                }
 494        } else {
 495                oclass = init->class;
 496        }
 497
 498        nvif_object_sclass_put(&sclass);
 499        if (!oclass)
 500                return nouveau_abi16_put(abi16, -EINVAL);
 501
 502        ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
 503        if (!ntfy)
 504                return nouveau_abi16_put(abi16, -ENOMEM);
 505
 506        list_add(&ntfy->head, &chan->notifiers);
 507
 508        client->route = NVDRM_OBJECT_ABI16;
 509        ret = nvif_object_init(&chan->chan->user, init->handle, oclass,
 510                               NULL, 0, &ntfy->object);
 511        client->route = NVDRM_OBJECT_NVIF;
 512
 513        if (ret)
 514                nouveau_abi16_ntfy_fini(chan, ntfy);
 515        return nouveau_abi16_put(abi16, ret);
 516}
 517
 518int
 519nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
 520{
 521        struct drm_nouveau_notifierobj_alloc *info = data;
 522        struct nouveau_drm *drm = nouveau_drm(dev);
 523        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 524        struct nouveau_abi16_chan *chan;
 525        struct nouveau_abi16_ntfy *ntfy;
 526        struct nvif_device *device = &abi16->device;
 527        struct nvif_client *client;
 528        struct nv_dma_v0 args = {};
 529        int ret;
 530
 531        if (unlikely(!abi16))
 532                return -ENOMEM;
 533
 534        /* completely unnecessary for these chipsets... */
 535        if (unlikely(device->info.family >= NV_DEVICE_INFO_V0_FERMI))
 536                return nouveau_abi16_put(abi16, -EINVAL);
 537        client = abi16->device.object.client;
 538
 539        chan = nouveau_abi16_chan(abi16, info->channel);
 540        if (!chan)
 541                return nouveau_abi16_put(abi16, -ENOENT);
 542
 543        ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
 544        if (!ntfy)
 545                return nouveau_abi16_put(abi16, -ENOMEM);
 546
 547        list_add(&ntfy->head, &chan->notifiers);
 548
 549        ret = nvkm_mm_head(&chan->heap, 0, 1, info->size, info->size, 1,
 550                           &ntfy->node);
 551        if (ret)
 552                goto done;
 553
 554        args.start = ntfy->node->offset;
 555        args.limit = ntfy->node->offset + ntfy->node->length - 1;
 556        if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 557                args.target = NV_DMA_V0_TARGET_VM;
 558                args.access = NV_DMA_V0_ACCESS_VM;
 559                args.start += chan->ntfy_vma->addr;
 560                args.limit += chan->ntfy_vma->addr;
 561        } else
 562        if (drm->agp.bridge) {
 563                args.target = NV_DMA_V0_TARGET_AGP;
 564                args.access = NV_DMA_V0_ACCESS_RDWR;
 565                args.start += drm->agp.base + chan->ntfy->bo.offset;
 566                args.limit += drm->agp.base + chan->ntfy->bo.offset;
 567        } else {
 568                args.target = NV_DMA_V0_TARGET_VM;
 569                args.access = NV_DMA_V0_ACCESS_RDWR;
 570                args.start += chan->ntfy->bo.offset;
 571                args.limit += chan->ntfy->bo.offset;
 572        }
 573
 574        client->route = NVDRM_OBJECT_ABI16;
 575        client->super = true;
 576        ret = nvif_object_init(&chan->chan->user, info->handle,
 577                               NV_DMA_IN_MEMORY, &args, sizeof(args),
 578                               &ntfy->object);
 579        client->super = false;
 580        client->route = NVDRM_OBJECT_NVIF;
 581        if (ret)
 582                goto done;
 583
 584        info->offset = ntfy->node->offset;
 585done:
 586        if (ret)
 587                nouveau_abi16_ntfy_fini(chan, ntfy);
 588        return nouveau_abi16_put(abi16, ret);
 589}
 590
 591int
 592nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
 593{
 594        struct drm_nouveau_gpuobj_free *fini = data;
 595        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 596        struct nouveau_abi16_chan *chan;
 597        struct nouveau_abi16_ntfy *ntfy;
 598        int ret = -ENOENT;
 599
 600        if (unlikely(!abi16))
 601                return -ENOMEM;
 602
 603        chan = nouveau_abi16_chan(abi16, fini->channel);
 604        if (!chan)
 605                return nouveau_abi16_put(abi16, -EINVAL);
 606
 607        /* synchronize with the user channel and destroy the gpu object */
 608        nouveau_channel_idle(chan->chan);
 609
 610        list_for_each_entry(ntfy, &chan->notifiers, head) {
 611                if (ntfy->object.handle == fini->handle) {
 612                        nouveau_abi16_ntfy_fini(chan, ntfy);
 613                        ret = 0;
 614                        break;
 615                }
 616        }
 617
 618        return nouveau_abi16_put(abi16, ret);
 619}
 620