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
40 static struct nouveau_abi16 *
nouveau_abi16(struct drm_file * file_priv)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_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
70 struct nouveau_abi16 *
nouveau_abi16_get(struct drm_file * file_priv)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
nouveau_abi16_put(struct nouveau_abi16 * abi16,int ret)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
nouveau_abi16_swclass(struct nouveau_drm * drm)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
nouveau_abi16_ntfy_fini(struct nouveau_abi16_chan * chan,struct nouveau_abi16_ntfy * ntfy)114 nouveau_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
123 static void
nouveau_abi16_chan_fini(struct nouveau_abi16 * abi16,struct nouveau_abi16_chan * chan)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 /* 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
158 void
nouveau_abi16_fini(struct nouveau_abi16 * abi16)159 nouveau_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
176 int
nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)177 nouveau_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
246 int
nouveau_abi16_ioctl_setparam(ABI16_IOCTL_ARGS)247 nouveau_abi16_ioctl_setparam(ABI16_IOCTL_ARGS)
248 {
249 return -EINVAL;
250 }
251
252 int
nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)253 nouveau_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, &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);
352 done:
353 if (ret)
354 nouveau_abi16_chan_fini(abi16, chan);
355 return nouveau_abi16_put(abi16, ret);
356 }
357
358 static struct nouveau_abi16_chan *
nouveau_abi16_chan(struct nouveau_abi16 * abi16,int channel)359 nouveau_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
371 int
nouveau_abi16_usif(struct drm_file * file_priv,void * data,u32 size)372 nouveau_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
409 int
nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)410 nouveau_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
426 int
nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)427 nouveau_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
518 int
nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)519 nouveau_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;
585 done:
586 if (ret)
587 nouveau_abi16_ntfy_fini(chan, ntfy);
588 return nouveau_abi16_put(abi16, ret);
589 }
590
591 int
nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)592 nouveau_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
