linux/drivers/gpu/drm/nouveau/nouveau_abi16.c
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   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_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
  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_dtor(&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(&chan->ntfy->bo.base);
 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_dtor(&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        struct pci_dev *pdev = to_pci_dev(dev->dev);
 185
 186        switch (getparam->param) {
 187        case NOUVEAU_GETPARAM_CHIPSET_ID:
 188                getparam->value = device->info.chipset;
 189                break;
 190        case NOUVEAU_GETPARAM_PCI_VENDOR:
 191                if (device->info.platform != NV_DEVICE_INFO_V0_SOC)
 192                        getparam->value = pdev->vendor;
 193                else
 194                        getparam->value = 0;
 195                break;
 196        case NOUVEAU_GETPARAM_PCI_DEVICE:
 197                if (device->info.platform != NV_DEVICE_INFO_V0_SOC)
 198                        getparam->value = pdev->device;
 199                else
 200                        getparam->value = 0;
 201                break;
 202        case NOUVEAU_GETPARAM_BUS_TYPE:
 203                switch (device->info.platform) {
 204                case NV_DEVICE_INFO_V0_AGP : getparam->value = 0; break;
 205                case NV_DEVICE_INFO_V0_PCI : getparam->value = 1; break;
 206                case NV_DEVICE_INFO_V0_PCIE: getparam->value = 2; break;
 207                case NV_DEVICE_INFO_V0_SOC : getparam->value = 3; break;
 208                case NV_DEVICE_INFO_V0_IGP :
 209                        if (!pci_is_pcie(pdev))
 210                                getparam->value = 1;
 211                        else
 212                                getparam->value = 2;
 213                        break;
 214                default:
 215                        WARN_ON(1);
 216                        break;
 217                }
 218                break;
 219        case NOUVEAU_GETPARAM_FB_SIZE:
 220                getparam->value = drm->gem.vram_available;
 221                break;
 222        case NOUVEAU_GETPARAM_AGP_SIZE:
 223                getparam->value = drm->gem.gart_available;
 224                break;
 225        case NOUVEAU_GETPARAM_VM_VRAM_BASE:
 226                getparam->value = 0; /* deprecated */
 227                break;
 228        case NOUVEAU_GETPARAM_PTIMER_TIME:
 229                getparam->value = nvif_device_time(device);
 230                break;
 231        case NOUVEAU_GETPARAM_HAS_BO_USAGE:
 232                getparam->value = 1;
 233                break;
 234        case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
 235                getparam->value = 1;
 236                break;
 237        case NOUVEAU_GETPARAM_GRAPH_UNITS:
 238                getparam->value = nvkm_gr_units(gr);
 239                break;
 240        default:
 241                NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);
 242                return -EINVAL;
 243        }
 244
 245        return 0;
 246}
 247
 248int
 249nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
 250{
 251        struct drm_nouveau_channel_alloc *init = data;
 252        struct nouveau_cli *cli = nouveau_cli(file_priv);
 253        struct nouveau_drm *drm = nouveau_drm(dev);
 254        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 255        struct nouveau_abi16_chan *chan;
 256        struct nvif_device *device;
 257        u64 engine;
 258        int ret;
 259
 260        if (unlikely(!abi16))
 261                return -ENOMEM;
 262
 263        if (!drm->channel)
 264                return nouveau_abi16_put(abi16, -ENODEV);
 265
 266        device = &abi16->device;
 267
 268        /* hack to allow channel engine type specification on kepler */
 269        if (device->info.family >= NV_DEVICE_INFO_V0_KEPLER) {
 270                if (init->fb_ctxdma_handle == ~0) {
 271                        switch (init->tt_ctxdma_handle) {
 272                        case 0x01: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_GR    ; break;
 273                        case 0x02: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_MSPDEC; break;
 274                        case 0x04: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_MSPPP ; break;
 275                        case 0x08: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_MSVLD ; break;
 276                        case 0x30: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_CE    ; break;
 277                        default:
 278                                return nouveau_abi16_put(abi16, -ENOSYS);
 279                        }
 280                } else {
 281                        engine = NV_DEVICE_HOST_RUNLIST_ENGINES_GR;
 282                }
 283
 284                if (engine != NV_DEVICE_HOST_RUNLIST_ENGINES_CE)
 285                        engine = nvif_fifo_runlist(device, engine);
 286                else
 287                        engine = nvif_fifo_runlist_ce(device);
 288                init->fb_ctxdma_handle = engine;
 289                init->tt_ctxdma_handle = 0;
 290        }
 291
 292        if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
 293                return nouveau_abi16_put(abi16, -EINVAL);
 294
 295        /* allocate "abi16 channel" data and make up a handle for it */
 296        chan = kzalloc(sizeof(*chan), GFP_KERNEL);
 297        if (!chan)
 298                return nouveau_abi16_put(abi16, -ENOMEM);
 299
 300        INIT_LIST_HEAD(&chan->notifiers);
 301        list_add(&chan->head, &abi16->channels);
 302
 303        /* create channel object and initialise dma and fence management */
 304        ret = nouveau_channel_new(drm, device, init->fb_ctxdma_handle,
 305                                  init->tt_ctxdma_handle, false, &chan->chan);
 306        if (ret)
 307                goto done;
 308
 309        init->channel = chan->chan->chid;
 310
 311        if (device->info.family >= NV_DEVICE_INFO_V0_TESLA)
 312                init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
 313                                        NOUVEAU_GEM_DOMAIN_GART;
 314        else
 315        if (chan->chan->push.buffer->bo.resource->mem_type == TTM_PL_VRAM)
 316                init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
 317        else
 318                init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
 319
 320        if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
 321                init->subchan[0].handle = 0x00000000;
 322                init->subchan[0].grclass = 0x0000;
 323                init->subchan[1].handle = chan->chan->nvsw.handle;
 324                init->subchan[1].grclass = 0x506e;
 325                init->nr_subchan = 2;
 326        }
 327
 328        /* Named memory object area */
 329        ret = nouveau_gem_new(cli, PAGE_SIZE, 0, NOUVEAU_GEM_DOMAIN_GART,
 330                              0, 0, &chan->ntfy);
 331        if (ret == 0)
 332                ret = nouveau_bo_pin(chan->ntfy, NOUVEAU_GEM_DOMAIN_GART,
 333                                     false);
 334        if (ret)
 335                goto done;
 336
 337        if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 338                ret = nouveau_vma_new(chan->ntfy, chan->chan->vmm,
 339                                      &chan->ntfy_vma);
 340                if (ret)
 341                        goto done;
 342        }
 343
 344        ret = drm_gem_handle_create(file_priv, &chan->ntfy->bo.base,
 345                                    &init->notifier_handle);
 346        if (ret)
 347                goto done;
 348
 349        ret = nvkm_mm_init(&chan->heap, 0, 0, PAGE_SIZE, 1);
 350done:
 351        if (ret)
 352                nouveau_abi16_chan_fini(abi16, chan);
 353        return nouveau_abi16_put(abi16, ret);
 354}
 355
 356static struct nouveau_abi16_chan *
 357nouveau_abi16_chan(struct nouveau_abi16 *abi16, int channel)
 358{
 359        struct nouveau_abi16_chan *chan;
 360
 361        list_for_each_entry(chan, &abi16->channels, head) {
 362                if (chan->chan->chid == channel)
 363                        return chan;
 364        }
 365
 366        return NULL;
 367}
 368
 369int
 370nouveau_abi16_usif(struct drm_file *file_priv, void *data, u32 size)
 371{
 372        union {
 373                struct nvif_ioctl_v0 v0;
 374        } *args = data;
 375        struct nouveau_abi16_chan *chan;
 376        struct nouveau_abi16 *abi16;
 377        int ret = -ENOSYS;
 378
 379        if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 380                switch (args->v0.type) {
 381                case NVIF_IOCTL_V0_NEW:
 382                case NVIF_IOCTL_V0_MTHD:
 383                case NVIF_IOCTL_V0_SCLASS:
 384                        break;
 385                default:
 386                        return -EACCES;
 387                }
 388        } else
 389                return ret;
 390
 391        if (!(abi16 = nouveau_abi16(file_priv)))
 392                return -ENOMEM;
 393
 394        if (args->v0.token != ~0ULL) {
 395                if (!(chan = nouveau_abi16_chan(abi16, args->v0.token)))
 396                        return -EINVAL;
 397                args->v0.object = nvif_handle(&chan->chan->user);
 398                args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
 399                return 0;
 400        }
 401
 402        args->v0.object = nvif_handle(&abi16->device.object);
 403        args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
 404        return 0;
 405}
 406
 407int
 408nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
 409{
 410        struct drm_nouveau_channel_free *req = data;
 411        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 412        struct nouveau_abi16_chan *chan;
 413
 414        if (unlikely(!abi16))
 415                return -ENOMEM;
 416
 417        chan = nouveau_abi16_chan(abi16, req->channel);
 418        if (!chan)
 419                return nouveau_abi16_put(abi16, -ENOENT);
 420        nouveau_abi16_chan_fini(abi16, chan);
 421        return nouveau_abi16_put(abi16, 0);
 422}
 423
 424int
 425nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
 426{
 427        struct drm_nouveau_grobj_alloc *init = data;
 428        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 429        struct nouveau_abi16_chan *chan;
 430        struct nouveau_abi16_ntfy *ntfy;
 431        struct nvif_client *client;
 432        struct nvif_sclass *sclass;
 433        s32 oclass = 0;
 434        int ret, i;
 435
 436        if (unlikely(!abi16))
 437                return -ENOMEM;
 438
 439        if (init->handle == ~0)
 440                return nouveau_abi16_put(abi16, -EINVAL);
 441        client = abi16->device.object.client;
 442
 443        chan = nouveau_abi16_chan(abi16, init->channel);
 444        if (!chan)
 445                return nouveau_abi16_put(abi16, -ENOENT);
 446
 447        ret = nvif_object_sclass_get(&chan->chan->user, &sclass);
 448        if (ret < 0)
 449                return nouveau_abi16_put(abi16, ret);
 450
 451        if ((init->class & 0x00ff) == 0x006e) {
 452                /* nvsw: compatibility with older 0x*6e class identifier */
 453                for (i = 0; !oclass && i < ret; i++) {
 454                        switch (sclass[i].oclass) {
 455                        case NVIF_CLASS_SW_NV04:
 456                        case NVIF_CLASS_SW_NV10:
 457                        case NVIF_CLASS_SW_NV50:
 458                        case NVIF_CLASS_SW_GF100:
 459                                oclass = sclass[i].oclass;
 460                                break;
 461                        default:
 462                                break;
 463                        }
 464                }
 465        } else
 466        if ((init->class & 0x00ff) == 0x00b1) {
 467                /* msvld: compatibility with incorrect version exposure */
 468                for (i = 0; i < ret; i++) {
 469                        if ((sclass[i].oclass & 0x00ff) == 0x00b1) {
 470                                oclass = sclass[i].oclass;
 471                                break;
 472                        }
 473                }
 474        } else
 475        if ((init->class & 0x00ff) == 0x00b2) { /* mspdec */
 476                /* mspdec: compatibility with incorrect version exposure */
 477                for (i = 0; i < ret; i++) {
 478                        if ((sclass[i].oclass & 0x00ff) == 0x00b2) {
 479                                oclass = sclass[i].oclass;
 480                                break;
 481                        }
 482                }
 483        } else
 484        if ((init->class & 0x00ff) == 0x00b3) { /* msppp */
 485                /* msppp: compatibility with incorrect version exposure */
 486                for (i = 0; i < ret; i++) {
 487                        if ((sclass[i].oclass & 0x00ff) == 0x00b3) {
 488                                oclass = sclass[i].oclass;
 489                                break;
 490                        }
 491                }
 492        } else {
 493                oclass = init->class;
 494        }
 495
 496        nvif_object_sclass_put(&sclass);
 497        if (!oclass)
 498                return nouveau_abi16_put(abi16, -EINVAL);
 499
 500        ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
 501        if (!ntfy)
 502                return nouveau_abi16_put(abi16, -ENOMEM);
 503
 504        list_add(&ntfy->head, &chan->notifiers);
 505
 506        client->route = NVDRM_OBJECT_ABI16;
 507        ret = nvif_object_ctor(&chan->chan->user, "abi16EngObj", init->handle,
 508                               oclass, NULL, 0, &ntfy->object);
 509        client->route = NVDRM_OBJECT_NVIF;
 510
 511        if (ret)
 512                nouveau_abi16_ntfy_fini(chan, ntfy);
 513        return nouveau_abi16_put(abi16, ret);
 514}
 515
 516int
 517nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
 518{
 519        struct drm_nouveau_notifierobj_alloc *info = data;
 520        struct nouveau_drm *drm = nouveau_drm(dev);
 521        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 522        struct nouveau_abi16_chan *chan;
 523        struct nouveau_abi16_ntfy *ntfy;
 524        struct nvif_device *device = &abi16->device;
 525        struct nvif_client *client;
 526        struct nv_dma_v0 args = {};
 527        int ret;
 528
 529        if (unlikely(!abi16))
 530                return -ENOMEM;
 531
 532        /* completely unnecessary for these chipsets... */
 533        if (unlikely(device->info.family >= NV_DEVICE_INFO_V0_FERMI))
 534                return nouveau_abi16_put(abi16, -EINVAL);
 535        client = abi16->device.object.client;
 536
 537        chan = nouveau_abi16_chan(abi16, info->channel);
 538        if (!chan)
 539                return nouveau_abi16_put(abi16, -ENOENT);
 540
 541        ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
 542        if (!ntfy)
 543                return nouveau_abi16_put(abi16, -ENOMEM);
 544
 545        list_add(&ntfy->head, &chan->notifiers);
 546
 547        ret = nvkm_mm_head(&chan->heap, 0, 1, info->size, info->size, 1,
 548                           &ntfy->node);
 549        if (ret)
 550                goto done;
 551
 552        args.start = ntfy->node->offset;
 553        args.limit = ntfy->node->offset + ntfy->node->length - 1;
 554        if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
 555                args.target = NV_DMA_V0_TARGET_VM;
 556                args.access = NV_DMA_V0_ACCESS_VM;
 557                args.start += chan->ntfy_vma->addr;
 558                args.limit += chan->ntfy_vma->addr;
 559        } else
 560        if (drm->agp.bridge) {
 561                args.target = NV_DMA_V0_TARGET_AGP;
 562                args.access = NV_DMA_V0_ACCESS_RDWR;
 563                args.start += drm->agp.base + chan->ntfy->offset;
 564                args.limit += drm->agp.base + chan->ntfy->offset;
 565        } else {
 566                args.target = NV_DMA_V0_TARGET_VM;
 567                args.access = NV_DMA_V0_ACCESS_RDWR;
 568                args.start += chan->ntfy->offset;
 569                args.limit += chan->ntfy->offset;
 570        }
 571
 572        client->route = NVDRM_OBJECT_ABI16;
 573        ret = nvif_object_ctor(&chan->chan->user, "abi16Ntfy", info->handle,
 574                               NV_DMA_IN_MEMORY, &args, sizeof(args),
 575                               &ntfy->object);
 576        client->route = NVDRM_OBJECT_NVIF;
 577        if (ret)
 578                goto done;
 579
 580        info->offset = ntfy->node->offset;
 581done:
 582        if (ret)
 583                nouveau_abi16_ntfy_fini(chan, ntfy);
 584        return nouveau_abi16_put(abi16, ret);
 585}
 586
 587int
 588nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
 589{
 590        struct drm_nouveau_gpuobj_free *fini = data;
 591        struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
 592        struct nouveau_abi16_chan *chan;
 593        struct nouveau_abi16_ntfy *ntfy;
 594        int ret = -ENOENT;
 595
 596        if (unlikely(!abi16))
 597                return -ENOMEM;
 598
 599        chan = nouveau_abi16_chan(abi16, fini->channel);
 600        if (!chan)
 601                return nouveau_abi16_put(abi16, -EINVAL);
 602
 603        /* synchronize with the user channel and destroy the gpu object */
 604        nouveau_channel_idle(chan->chan);
 605
 606        list_for_each_entry(ntfy, &chan->notifiers, head) {
 607                if (ntfy->object.handle == fini->handle) {
 608                        nouveau_abi16_ntfy_fini(chan, ntfy);
 609                        ret = 0;
 610                        break;
 611                }
 612        }
 613
 614        return nouveau_abi16_put(abi16, ret);
 615}
 616