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_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 *
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_dtor(&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(&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
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_dtor(&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 break;
218 case NOUVEAU_GETPARAM_FB_SIZE:
219 getparam->value = drm->gem.vram_available;
220 break;
221 case NOUVEAU_GETPARAM_AGP_SIZE:
222 getparam->value = drm->gem.gart_available;
223 break;
224 case NOUVEAU_GETPARAM_VM_VRAM_BASE:
225 getparam->value = 0; /* deprecated */
226 break;
227 case NOUVEAU_GETPARAM_PTIMER_TIME:
228 getparam->value = nvif_device_time(device);
229 break;
230 case NOUVEAU_GETPARAM_HAS_BO_USAGE:
231 getparam->value = 1;
232 break;
233 case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
234 getparam->value = 1;
235 break;
236 case NOUVEAU_GETPARAM_GRAPH_UNITS:
237 getparam->value = nvkm_gr_units(gr);
238 break;
239 default:
240 NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);
241 return -EINVAL;
242 }
243
244 return 0;
245 }
246
247 int
nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)248 nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
249 {
250 struct drm_nouveau_channel_alloc *init = data;
251 struct nouveau_cli *cli = nouveau_cli(file_priv);
252 struct nouveau_drm *drm = nouveau_drm(dev);
253 struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
254 struct nouveau_abi16_chan *chan;
255 struct nvif_device *device;
256 u64 engine;
257 int ret;
258
259 if (unlikely(!abi16))
260 return -ENOMEM;
261
262 if (!drm->channel)
263 return nouveau_abi16_put(abi16, -ENODEV);
264
265 device = &abi16->device;
266
267 /* hack to allow channel engine type specification on kepler */
268 if (device->info.family >= NV_DEVICE_INFO_V0_KEPLER) {
269 if (init->fb_ctxdma_handle == ~0) {
270 switch (init->tt_ctxdma_handle) {
271 case 0x01: engine = NV_DEVICE_INFO_ENGINE_GR ; break;
272 case 0x02: engine = NV_DEVICE_INFO_ENGINE_MSPDEC; break;
273 case 0x04: engine = NV_DEVICE_INFO_ENGINE_MSPPP ; break;
274 case 0x08: engine = NV_DEVICE_INFO_ENGINE_MSVLD ; break;
275 case 0x30: engine = NV_DEVICE_INFO_ENGINE_CE ; break;
276 default:
277 return nouveau_abi16_put(abi16, -ENOSYS);
278 }
279 } else {
280 engine = NV_DEVICE_INFO_ENGINE_GR;
281 }
282
283 if (engine != NV_DEVICE_INFO_ENGINE_CE)
284 engine = nvif_fifo_runlist(device, engine);
285 else
286 engine = nvif_fifo_runlist_ce(device);
287 init->fb_ctxdma_handle = engine;
288 init->tt_ctxdma_handle = 0;
289 }
290
291 if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
292 return nouveau_abi16_put(abi16, -EINVAL);
293
294 /* allocate "abi16 channel" data and make up a handle for it */
295 chan = kzalloc(sizeof(*chan), GFP_KERNEL);
296 if (!chan)
297 return nouveau_abi16_put(abi16, -ENOMEM);
298
299 INIT_LIST_HEAD(&chan->notifiers);
300 list_add(&chan->head, &abi16->channels);
301
302 /* create channel object and initialise dma and fence management */
303 ret = nouveau_channel_new(drm, device, init->fb_ctxdma_handle,
304 init->tt_ctxdma_handle, false, &chan->chan);
305 if (ret)
306 goto done;
307
308 init->channel = chan->chan->chid;
309
310 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA)
311 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
312 NOUVEAU_GEM_DOMAIN_GART;
313 else
314 if (chan->chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM)
315 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
316 else
317 init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
318
319 if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
320 init->subchan[0].handle = 0x00000000;
321 init->subchan[0].grclass = 0x0000;
322 init->subchan[1].handle = chan->chan->nvsw.handle;
323 init->subchan[1].grclass = 0x506e;
324 init->nr_subchan = 2;
325 }
326
327 /* Named memory object area */
328 ret = nouveau_gem_new(cli, PAGE_SIZE, 0, NOUVEAU_GEM_DOMAIN_GART,
329 0, 0, &chan->ntfy);
330 if (ret == 0)
331 ret = nouveau_bo_pin(chan->ntfy, NOUVEAU_GEM_DOMAIN_GART,
332 false);
333 if (ret)
334 goto done;
335
336 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
337 ret = nouveau_vma_new(chan->ntfy, chan->chan->vmm,
338 &chan->ntfy_vma);
339 if (ret)
340 goto done;
341 }
342
343 ret = drm_gem_handle_create(file_priv, &chan->ntfy->bo.base,
344 &init->notifier_handle);
345 if (ret)
346 goto done;
347
348 ret = nvkm_mm_init(&chan->heap, 0, 0, PAGE_SIZE, 1);
349 done:
350 if (ret)
351 nouveau_abi16_chan_fini(abi16, chan);
352 return nouveau_abi16_put(abi16, ret);
353 }
354
355 static struct nouveau_abi16_chan *
nouveau_abi16_chan(struct nouveau_abi16 * abi16,int channel)356 nouveau_abi16_chan(struct nouveau_abi16 *abi16, int channel)
357 {
358 struct nouveau_abi16_chan *chan;
359
360 list_for_each_entry(chan, &abi16->channels, head) {
361 if (chan->chan->chid == channel)
362 return chan;
363 }
364
365 return NULL;
366 }
367
368 int
nouveau_abi16_usif(struct drm_file * file_priv,void * data,u32 size)369 nouveau_abi16_usif(struct drm_file *file_priv, void *data, u32 size)
370 {
371 union {
372 struct nvif_ioctl_v0 v0;
373 } *args = data;
374 struct nouveau_abi16_chan *chan;
375 struct nouveau_abi16 *abi16;
376 int ret = -ENOSYS;
377
378 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
379 switch (args->v0.type) {
380 case NVIF_IOCTL_V0_NEW:
381 case NVIF_IOCTL_V0_MTHD:
382 case NVIF_IOCTL_V0_SCLASS:
383 break;
384 default:
385 return -EACCES;
386 }
387 } else
388 return ret;
389
390 if (!(abi16 = nouveau_abi16(file_priv)))
391 return -ENOMEM;
392
393 if (args->v0.token != ~0ULL) {
394 if (!(chan = nouveau_abi16_chan(abi16, args->v0.token)))
395 return -EINVAL;
396 args->v0.object = nvif_handle(&chan->chan->user);
397 args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
398 return 0;
399 }
400
401 args->v0.object = nvif_handle(&abi16->device.object);
402 args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
403 return 0;
404 }
405
406 int
nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)407 nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
408 {
409 struct drm_nouveau_channel_free *req = data;
410 struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
411 struct nouveau_abi16_chan *chan;
412
413 if (unlikely(!abi16))
414 return -ENOMEM;
415
416 chan = nouveau_abi16_chan(abi16, req->channel);
417 if (!chan)
418 return nouveau_abi16_put(abi16, -ENOENT);
419 nouveau_abi16_chan_fini(abi16, chan);
420 return nouveau_abi16_put(abi16, 0);
421 }
422
423 int
nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)424 nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
425 {
426 struct drm_nouveau_grobj_alloc *init = data;
427 struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
428 struct nouveau_abi16_chan *chan;
429 struct nouveau_abi16_ntfy *ntfy;
430 struct nvif_client *client;
431 struct nvif_sclass *sclass;
432 s32 oclass = 0;
433 int ret, i;
434
435 if (unlikely(!abi16))
436 return -ENOMEM;
437
438 if (init->handle == ~0)
439 return nouveau_abi16_put(abi16, -EINVAL);
440 client = abi16->device.object.client;
441
442 chan = nouveau_abi16_chan(abi16, init->channel);
443 if (!chan)
444 return nouveau_abi16_put(abi16, -ENOENT);
445
446 ret = nvif_object_sclass_get(&chan->chan->user, &sclass);
447 if (ret < 0)
448 return nouveau_abi16_put(abi16, ret);
449
450 if ((init->class & 0x00ff) == 0x006e) {
451 /* nvsw: compatibility with older 0x*6e class identifier */
452 for (i = 0; !oclass && i < ret; i++) {
453 switch (sclass[i].oclass) {
454 case NVIF_CLASS_SW_NV04:
455 case NVIF_CLASS_SW_NV10:
456 case NVIF_CLASS_SW_NV50:
457 case NVIF_CLASS_SW_GF100:
458 oclass = sclass[i].oclass;
459 break;
460 default:
461 break;
462 }
463 }
464 } else
465 if ((init->class & 0x00ff) == 0x00b1) {
466 /* msvld: compatibility with incorrect version exposure */
467 for (i = 0; i < ret; i++) {
468 if ((sclass[i].oclass & 0x00ff) == 0x00b1) {
469 oclass = sclass[i].oclass;
470 break;
471 }
472 }
473 } else
474 if ((init->class & 0x00ff) == 0x00b2) { /* mspdec */
475 /* mspdec: compatibility with incorrect version exposure */
476 for (i = 0; i < ret; i++) {
477 if ((sclass[i].oclass & 0x00ff) == 0x00b2) {
478 oclass = sclass[i].oclass;
479 break;
480 }
481 }
482 } else
483 if ((init->class & 0x00ff) == 0x00b3) { /* msppp */
484 /* msppp: compatibility with incorrect version exposure */
485 for (i = 0; i < ret; i++) {
486 if ((sclass[i].oclass & 0x00ff) == 0x00b3) {
487 oclass = sclass[i].oclass;
488 break;
489 }
490 }
491 } else {
492 oclass = init->class;
493 }
494
495 nvif_object_sclass_put(&sclass);
496 if (!oclass)
497 return nouveau_abi16_put(abi16, -EINVAL);
498
499 ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
500 if (!ntfy)
501 return nouveau_abi16_put(abi16, -ENOMEM);
502
503 list_add(&ntfy->head, &chan->notifiers);
504
505 client->route = NVDRM_OBJECT_ABI16;
506 ret = nvif_object_ctor(&chan->chan->user, "abi16EngObj", init->handle,
507 oclass, NULL, 0, &ntfy->object);
508 client->route = NVDRM_OBJECT_NVIF;
509
510 if (ret)
511 nouveau_abi16_ntfy_fini(chan, ntfy);
512 return nouveau_abi16_put(abi16, ret);
513 }
514
515 int
nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)516 nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
517 {
518 struct drm_nouveau_notifierobj_alloc *info = data;
519 struct nouveau_drm *drm = nouveau_drm(dev);
520 struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
521 struct nouveau_abi16_chan *chan;
522 struct nouveau_abi16_ntfy *ntfy;
523 struct nvif_device *device = &abi16->device;
524 struct nvif_client *client;
525 struct nv_dma_v0 args = {};
526 int ret;
527
528 if (unlikely(!abi16))
529 return -ENOMEM;
530
531 /* completely unnecessary for these chipsets... */
532 if (unlikely(device->info.family >= NV_DEVICE_INFO_V0_FERMI))
533 return nouveau_abi16_put(abi16, -EINVAL);
534 client = abi16->device.object.client;
535
536 chan = nouveau_abi16_chan(abi16, info->channel);
537 if (!chan)
538 return nouveau_abi16_put(abi16, -ENOENT);
539
540 ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
541 if (!ntfy)
542 return nouveau_abi16_put(abi16, -ENOMEM);
543
544 list_add(&ntfy->head, &chan->notifiers);
545
546 ret = nvkm_mm_head(&chan->heap, 0, 1, info->size, info->size, 1,
547 &ntfy->node);
548 if (ret)
549 goto done;
550
551 args.start = ntfy->node->offset;
552 args.limit = ntfy->node->offset + ntfy->node->length - 1;
553 if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
554 args.target = NV_DMA_V0_TARGET_VM;
555 args.access = NV_DMA_V0_ACCESS_VM;
556 args.start += chan->ntfy_vma->addr;
557 args.limit += chan->ntfy_vma->addr;
558 } else
559 if (drm->agp.bridge) {
560 args.target = NV_DMA_V0_TARGET_AGP;
561 args.access = NV_DMA_V0_ACCESS_RDWR;
562 args.start += drm->agp.base + chan->ntfy->offset;
563 args.limit += drm->agp.base + chan->ntfy->offset;
564 } else {
565 args.target = NV_DMA_V0_TARGET_VM;
566 args.access = NV_DMA_V0_ACCESS_RDWR;
567 args.start += chan->ntfy->offset;
568 args.limit += chan->ntfy->offset;
569 }
570
571 client->route = NVDRM_OBJECT_ABI16;
572 client->super = true;
573 ret = nvif_object_ctor(&chan->chan->user, "abi16Ntfy", info->handle,
574 NV_DMA_IN_MEMORY, &args, sizeof(args),
575 &ntfy->object);
576 client->super = false;
577 client->route = NVDRM_OBJECT_NVIF;
578 if (ret)
579 goto done;
580
581 info->offset = ntfy->node->offset;
582 done:
583 if (ret)
584 nouveau_abi16_ntfy_fini(chan, ntfy);
585 return nouveau_abi16_put(abi16, ret);
586 }
587
588 int
nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)589 nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
590 {
591 struct drm_nouveau_gpuobj_free *fini = data;
592 struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
593 struct nouveau_abi16_chan *chan;
594 struct nouveau_abi16_ntfy *ntfy;
595 int ret = -ENOENT;
596
597 if (unlikely(!abi16))
598 return -ENOMEM;
599
600 chan = nouveau_abi16_chan(abi16, fini->channel);
601 if (!chan)
602 return nouveau_abi16_put(abi16, -EINVAL);
603
604 /* synchronize with the user channel and destroy the gpu object */
605 nouveau_channel_idle(chan->chan);
606
607 list_for_each_entry(ntfy, &chan->notifiers, head) {
608 if (ntfy->object.handle == fini->handle) {
609 nouveau_abi16_ntfy_fini(chan, ntfy);
610 ret = 0;
611 break;
612 }
613 }
614
615 return nouveau_abi16_put(abi16, ret);
616 }
617