1 files changed, 639 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c b/drivers/gpu/drm/nouveau/nouveau_abi16.c
new file mode 100644
index 000000000..5bee655e7
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c
@@ -0,0 +1,639 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include <nvif/client.h>
+#include <nvif/driver.h>
+#include <nvif/fifo.h>
+#include <nvif/ioctl.h>
+#include <nvif/class.h>
+#include <nvif/cl0002.h>
+#include <nvif/cla06f.h>
+#include <nvif/unpack.h>
+
+#include "nouveau_drv.h"
+#include "nouveau_dma.h"
+#include "nouveau_gem.h"
+#include "nouveau_chan.h"
+#include "nouveau_abi16.h"
+#include "nouveau_vmm.h"
+
+static struct nouveau_abi16 *
+nouveau_abi16(struct drm_file *file_priv)
+{
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	if (!cli->abi16) {
+		struct nouveau_abi16 *abi16;
+		cli->abi16 = abi16 = kzalloc(sizeof(*abi16), GFP_KERNEL);
+		if (cli->abi16) {
+			struct nv_device_v0 args = {
+				.device = ~0ULL,
+			};
+
+			INIT_LIST_HEAD(&abi16->channels);
+
+			/* allocate device object targeting client's default
+			 * device (ie. the one that belongs to the fd it
+			 * opened)
+			 */
+			if (nvif_device_ctor(&cli->base.object, "abi16Device",
+					     0, NV_DEVICE, &args, sizeof(args),
+					     &abi16->device) == 0)
+				return cli->abi16;
+
+			kfree(cli->abi16);
+			cli->abi16 = NULL;
+		}
+	}
+	return cli->abi16;
+}
+
+struct nouveau_abi16 *
+nouveau_abi16_get(struct drm_file *file_priv)
+{
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	mutex_lock(&cli->mutex);
+	if (nouveau_abi16(file_priv))
+		return cli->abi16;
+	mutex_unlock(&cli->mutex);
+	return NULL;
+}
+
+int
+nouveau_abi16_put(struct nouveau_abi16 *abi16, int ret)
+{
+	struct nouveau_cli *cli = (void *)abi16->device.object.client;
+	mutex_unlock(&cli->mutex);
+	return ret;
+}
+
+s32
+nouveau_abi16_swclass(struct nouveau_drm *drm)
+{
+	switch (drm->client.device.info.family) {
+	case NV_DEVICE_INFO_V0_TNT:
+		return NVIF_CLASS_SW_NV04;
+	case NV_DEVICE_INFO_V0_CELSIUS:
+	case NV_DEVICE_INFO_V0_KELVIN:
+	case NV_DEVICE_INFO_V0_RANKINE:
+	case NV_DEVICE_INFO_V0_CURIE:
+		return NVIF_CLASS_SW_NV10;
+	case NV_DEVICE_INFO_V0_TESLA:
+		return NVIF_CLASS_SW_NV50;
+	case NV_DEVICE_INFO_V0_FERMI:
+	case NV_DEVICE_INFO_V0_KEPLER:
+	case NV_DEVICE_INFO_V0_MAXWELL:
+	case NV_DEVICE_INFO_V0_PASCAL:
+	case NV_DEVICE_INFO_V0_VOLTA:
+		return NVIF_CLASS_SW_GF100;
+	}
+
+	return 0x0000;
+}
+
+static void
+nouveau_abi16_ntfy_fini(struct nouveau_abi16_chan *chan,
+			struct nouveau_abi16_ntfy *ntfy)
+{
+	nvif_object_dtor(&ntfy->object);
+	nvkm_mm_free(&chan->heap, &ntfy->node);
+	list_del(&ntfy->head);
+	kfree(ntfy);
+}
+
+static void
+nouveau_abi16_chan_fini(struct nouveau_abi16 *abi16,
+			struct nouveau_abi16_chan *chan)
+{
+	struct nouveau_abi16_ntfy *ntfy, *temp;
+
+	/* wait for all activity to stop before cleaning up */
+	if (chan->chan)
+		nouveau_channel_idle(chan->chan);
+
+	/* cleanup notifier state */
+	list_for_each_entry_safe(ntfy, temp, &chan->notifiers, head) {
+		nouveau_abi16_ntfy_fini(chan, ntfy);
+	}
+
+	if (chan->ntfy) {
+		nouveau_vma_del(&chan->ntfy_vma);
+		nouveau_bo_unpin(chan->ntfy);
+		drm_gem_object_put(&chan->ntfy->bo.base);
+	}
+
+	if (chan->heap.block_size)
+		nvkm_mm_fini(&chan->heap);
+
+	/* destroy channel object, all children will be killed too */
+	if (chan->chan) {
+		nvif_object_dtor(&chan->ce);
+		nouveau_channel_del(&chan->chan);
+	}
+
+	list_del(&chan->head);
+	kfree(chan);
+}
+
+void
+nouveau_abi16_fini(struct nouveau_abi16 *abi16)
+{
+	struct nouveau_cli *cli = (void *)abi16->device.object.client;
+	struct nouveau_abi16_chan *chan, *temp;
+
+	/* cleanup channels */
+	list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
+		nouveau_abi16_chan_fini(abi16, chan);
+	}
+
+	/* destroy the device object */
+	nvif_device_dtor(&abi16->device);
+
+	kfree(cli->abi16);
+	cli->abi16 = NULL;
+}
+
+int
+nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
+{
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nvif_device *device = &drm->client.device;
+	struct nvkm_gr *gr = nvxx_gr(device);
+	struct drm_nouveau_getparam *getparam = data;
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+
+	switch (getparam->param) {
+	case NOUVEAU_GETPARAM_CHIPSET_ID:
+		getparam->value = device->info.chipset;
+		break;
+	case NOUVEAU_GETPARAM_PCI_VENDOR:
+		if (device->info.platform != NV_DEVICE_INFO_V0_SOC)
+			getparam->value = pdev->vendor;
+		else
+			getparam->value = 0;
+		break;
+	case NOUVEAU_GETPARAM_PCI_DEVICE:
+		if (device->info.platform != NV_DEVICE_INFO_V0_SOC)
+			getparam->value = pdev->device;
+		else
+			getparam->value = 0;
+		break;
+	case NOUVEAU_GETPARAM_BUS_TYPE:
+		switch (device->info.platform) {
+		case NV_DEVICE_INFO_V0_AGP : getparam->value = 0; break;
+		case NV_DEVICE_INFO_V0_PCI : getparam->value = 1; break;
+		case NV_DEVICE_INFO_V0_PCIE: getparam->value = 2; break;
+		case NV_DEVICE_INFO_V0_SOC : getparam->value = 3; break;
+		case NV_DEVICE_INFO_V0_IGP :
+			if (!pci_is_pcie(pdev))
+				getparam->value = 1;
+			else
+				getparam->value = 2;
+			break;
+		default:
+			WARN_ON(1);
+			break;
+		}
+		break;
+	case NOUVEAU_GETPARAM_FB_SIZE:
+		getparam->value = drm->gem.vram_available;
+		break;
+	case NOUVEAU_GETPARAM_AGP_SIZE:
+		getparam->value = drm->gem.gart_available;
+		break;
+	case NOUVEAU_GETPARAM_VM_VRAM_BASE:
+		getparam->value = 0; /* deprecated */
+		break;
+	case NOUVEAU_GETPARAM_PTIMER_TIME:
+		getparam->value = nvif_device_time(device);
+		break;
+	case NOUVEAU_GETPARAM_HAS_BO_USAGE:
+		getparam->value = 1;
+		break;
+	case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
+		getparam->value = 1;
+		break;
+	case NOUVEAU_GETPARAM_GRAPH_UNITS:
+		getparam->value = nvkm_gr_units(gr);
+		break;
+	default:
+		NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int
+nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
+{
+	struct drm_nouveau_channel_alloc *init = data;
+	struct nouveau_cli *cli = nouveau_cli(file_priv);
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
+	struct nouveau_abi16_chan *chan;
+	struct nvif_device *device;
+	u64 engine;
+	int ret;
+
+	if (unlikely(!abi16))
+		return -ENOMEM;
+
+	if (!drm->channel)
+		return nouveau_abi16_put(abi16, -ENODEV);
+
+	device = &abi16->device;
+
+	/* hack to allow channel engine type specification on kepler */
+	if (device->info.family >= NV_DEVICE_INFO_V0_KEPLER) {
+		if (init->fb_ctxdma_handle == ~0) {
+			switch (init->tt_ctxdma_handle) {
+			case 0x01: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_GR    ; break;
+			case 0x02: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_MSPDEC; break;
+			case 0x04: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_MSPPP ; break;
+			case 0x08: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_MSVLD ; break;
+			case 0x30: engine = NV_DEVICE_HOST_RUNLIST_ENGINES_CE    ; break;
+			default:
+				return nouveau_abi16_put(abi16, -ENOSYS);
+			}
+		} else {
+			engine = NV_DEVICE_HOST_RUNLIST_ENGINES_GR;
+		}
+
+		if (engine != NV_DEVICE_HOST_RUNLIST_ENGINES_CE)
+			engine = nvif_fifo_runlist(device, engine);
+		else
+			engine = nvif_fifo_runlist_ce(device);
+		init->fb_ctxdma_handle = engine;
+		init->tt_ctxdma_handle = 0;
+	}
+
+	if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
+		return nouveau_abi16_put(abi16, -EINVAL);
+
+	/* allocate "abi16 channel" data and make up a handle for it */
+	chan = kzalloc(sizeof(*chan), GFP_KERNEL);
+	if (!chan)
+		return nouveau_abi16_put(abi16, -ENOMEM);
+
+	INIT_LIST_HEAD(&chan->notifiers);
+	list_add(&chan->head, &abi16->channels);
+
+	/* create channel object and initialise dma and fence management */
+	ret = nouveau_channel_new(drm, device, init->fb_ctxdma_handle,
+				  init->tt_ctxdma_handle, false, &chan->chan);
+	if (ret)
+		goto done;
+
+	init->channel = chan->chan->chid;
+
+	if (device->info.family >= NV_DEVICE_INFO_V0_TESLA)
+		init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
+					NOUVEAU_GEM_DOMAIN_GART;
+	else
+	if (chan->chan->push.buffer->bo.resource->mem_type == TTM_PL_VRAM)
+		init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
+	else
+		init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
+
+	if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
+		init->subchan[0].handle = 0x00000000;
+		init->subchan[0].grclass = 0x0000;
+		init->subchan[1].handle = chan->chan->nvsw.handle;
+		init->subchan[1].grclass = 0x506e;
+		init->nr_subchan = 2;
+	}
+
+	/* Workaround "nvc0" gallium driver using classes it doesn't allocate on
+	 * Kepler and above.  NVKM no longer always sets CE_CTX_VALID as part of
+	 * channel init, now we know what that stuff actually is.
+	 *
+	 * Doesn't matter for Kepler/Pascal, CE context stored in NV_RAMIN.
+	 *
+	 * Userspace was fixed prior to adding Ampere support.
+	 */
+	switch (device->info.family) {
+	case NV_DEVICE_INFO_V0_VOLTA:
+		ret = nvif_object_ctor(&chan->chan->user, "abi16CeWar", 0, VOLTA_DMA_COPY_A,
+				       NULL, 0, &chan->ce);
+		if (ret)
+			goto done;
+		break;
+	case NV_DEVICE_INFO_V0_TURING:
+		ret = nvif_object_ctor(&chan->chan->user, "abi16CeWar", 0, TURING_DMA_COPY_A,
+				       NULL, 0, &chan->ce);
+		if (ret)
+			goto done;
+		break;
+	default:
+		break;
+	}
+
+	/* Named memory object area */
+	ret = nouveau_gem_new(cli, PAGE_SIZE, 0, NOUVEAU_GEM_DOMAIN_GART,
+			      0, 0, &chan->ntfy);
+	if (ret == 0)
+		ret = nouveau_bo_pin(chan->ntfy, NOUVEAU_GEM_DOMAIN_GART,
+				     false);
+	if (ret)
+		goto done;
+
+	if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
+		ret = nouveau_vma_new(chan->ntfy, chan->chan->vmm,
+				      &chan->ntfy_vma);
+		if (ret)
+			goto done;
+	}
+
+	ret = drm_gem_handle_create(file_priv, &chan->ntfy->bo.base,
+				    &init->notifier_handle);
+	if (ret)
+		goto done;
+
+	ret = nvkm_mm_init(&chan->heap, 0, 0, PAGE_SIZE, 1);
+done:
+	if (ret)
+		nouveau_abi16_chan_fini(abi16, chan);
+	return nouveau_abi16_put(abi16, ret);
+}
+
+static struct nouveau_abi16_chan *
+nouveau_abi16_chan(struct nouveau_abi16 *abi16, int channel)
+{
+	struct nouveau_abi16_chan *chan;
+
+	list_for_each_entry(chan, &abi16->channels, head) {
+		if (chan->chan->chid == channel)
+			return chan;
+	}
+
+	return NULL;
+}
+
+int
+nouveau_abi16_usif(struct drm_file *file_priv, void *data, u32 size)
+{
+	union {
+		struct nvif_ioctl_v0 v0;
+	} *args = data;
+	struct nouveau_abi16_chan *chan;
+	struct nouveau_abi16 *abi16;
+	int ret = -ENOSYS;
+
+	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
+		switch (args->v0.type) {
+		case NVIF_IOCTL_V0_NEW:
+		case NVIF_IOCTL_V0_MTHD:
+		case NVIF_IOCTL_V0_SCLASS:
+			break;
+		default:
+			return -EACCES;
+		}
+	} else
+		return ret;
+
+	if (!(abi16 = nouveau_abi16(file_priv)))
+		return -ENOMEM;
+
+	if (args->v0.token != ~0ULL) {
+		if (!(chan = nouveau_abi16_chan(abi16, args->v0.token)))
+			return -EINVAL;
+		args->v0.object = nvif_handle(&chan->chan->user);
+		args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
+		return 0;
+	}
+
+	args->v0.object = nvif_handle(&abi16->device.object);
+	args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
+	return 0;
+}
+
+int
+nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
+{
+	struct drm_nouveau_channel_free *req = data;
+	struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
+	struct nouveau_abi16_chan *chan;
+
+	if (unlikely(!abi16))
+		return -ENOMEM;
+
+	chan = nouveau_abi16_chan(abi16, req->channel);
+	if (!chan)
+		return nouveau_abi16_put(abi16, -ENOENT);
+	nouveau_abi16_chan_fini(abi16, chan);
+	return nouveau_abi16_put(abi16, 0);
+}
+
+int
+nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
+{
+	struct drm_nouveau_grobj_alloc *init = data;
+	struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
+	struct nouveau_abi16_chan *chan;
+	struct nouveau_abi16_ntfy *ntfy;
+	struct nvif_client *client;
+	struct nvif_sclass *sclass;
+	s32 oclass = 0;
+	int ret, i;
+
+	if (unlikely(!abi16))
+		return -ENOMEM;
+
+	if (init->handle == ~0)
+		return nouveau_abi16_put(abi16, -EINVAL);
+	client = abi16->device.object.client;
+
+	chan = nouveau_abi16_chan(abi16, init->channel);
+	if (!chan)
+		return nouveau_abi16_put(abi16, -ENOENT);
+
+	ret = nvif_object_sclass_get(&chan->chan->user, &sclass);
+	if (ret < 0)
+		return nouveau_abi16_put(abi16, ret);
+
+	if ((init->class & 0x00ff) == 0x006e) {
+		/* nvsw: compatibility with older 0x*6e class identifier */
+		for (i = 0; !oclass && i < ret; i++) {
+			switch (sclass[i].oclass) {
+			case NVIF_CLASS_SW_NV04:
+			case NVIF_CLASS_SW_NV10:
+			case NVIF_CLASS_SW_NV50:
+			case NVIF_CLASS_SW_GF100:
+				oclass = sclass[i].oclass;
+				break;
+			default:
+				break;
+			}
+		}
+	} else
+	if ((init->class & 0x00ff) == 0x00b1) {
+		/* msvld: compatibility with incorrect version exposure */
+		for (i = 0; i < ret; i++) {
+			if ((sclass[i].oclass & 0x00ff) == 0x00b1) {
+				oclass = sclass[i].oclass;
+				break;
+			}
+		}
+	} else
+	if ((init->class & 0x00ff) == 0x00b2) { /* mspdec */
+		/* mspdec: compatibility with incorrect version exposure */
+		for (i = 0; i < ret; i++) {
+			if ((sclass[i].oclass & 0x00ff) == 0x00b2) {
+				oclass = sclass[i].oclass;
+				break;
+			}
+		}
+	} else
+	if ((init->class & 0x00ff) == 0x00b3) { /* msppp */
+		/* msppp: compatibility with incorrect version exposure */
+		for (i = 0; i < ret; i++) {
+			if ((sclass[i].oclass & 0x00ff) == 0x00b3) {
+				oclass = sclass[i].oclass;
+				break;
+			}
+		}
+	} else {
+		oclass = init->class;
+	}
+
+	nvif_object_sclass_put(&sclass);
+	if (!oclass)
+		return nouveau_abi16_put(abi16, -EINVAL);
+
+	ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
+	if (!ntfy)
+		return nouveau_abi16_put(abi16, -ENOMEM);
+
+	list_add(&ntfy->head, &chan->notifiers);
+
+	client->route = NVDRM_OBJECT_ABI16;
+	ret = nvif_object_ctor(&chan->chan->user, "abi16EngObj", init->handle,
+			       oclass, NULL, 0, &ntfy->object);
+	client->route = NVDRM_OBJECT_NVIF;
+
+	if (ret)
+		nouveau_abi16_ntfy_fini(chan, ntfy);
+	return nouveau_abi16_put(abi16, ret);
+}
+
+int
+nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
+{
+	struct drm_nouveau_notifierobj_alloc *info = data;
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
+	struct nouveau_abi16_chan *chan;
+	struct nouveau_abi16_ntfy *ntfy;
+	struct nvif_device *device = &abi16->device;
+	struct nvif_client *client;
+	struct nv_dma_v0 args = {};
+	int ret;
+
+	if (unlikely(!abi16))
+		return -ENOMEM;
+
+	/* completely unnecessary for these chipsets... */
+	if (unlikely(device->info.family >= NV_DEVICE_INFO_V0_FERMI))
+		return nouveau_abi16_put(abi16, -EINVAL);
+	client = abi16->device.object.client;
+
+	chan = nouveau_abi16_chan(abi16, info->channel);
+	if (!chan)
+		return nouveau_abi16_put(abi16, -ENOENT);
+
+	ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
+	if (!ntfy)
+		return nouveau_abi16_put(abi16, -ENOMEM);
+
+	list_add(&ntfy->head, &chan->notifiers);
+
+	ret = nvkm_mm_head(&chan->heap, 0, 1, info->size, info->size, 1,
+			   &ntfy->node);
+	if (ret)
+		goto done;
+
+	args.start = ntfy->node->offset;
+	args.limit = ntfy->node->offset + ntfy->node->length - 1;
+	if (device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
+		args.target = NV_DMA_V0_TARGET_VM;
+		args.access = NV_DMA_V0_ACCESS_VM;
+		args.start += chan->ntfy_vma->addr;
+		args.limit += chan->ntfy_vma->addr;
+	} else
+	if (drm->agp.bridge) {
+		args.target = NV_DMA_V0_TARGET_AGP;
+		args.access = NV_DMA_V0_ACCESS_RDWR;
+		args.start += drm->agp.base + chan->ntfy->offset;
+		args.limit += drm->agp.base + chan->ntfy->offset;
+	} else {
+		args.target = NV_DMA_V0_TARGET_VM;
+		args.access = NV_DMA_V0_ACCESS_RDWR;
+		args.start += chan->ntfy->offset;
+		args.limit += chan->ntfy->offset;
+	}
+
+	client->route = NVDRM_OBJECT_ABI16;
+	ret = nvif_object_ctor(&chan->chan->user, "abi16Ntfy", info->handle,
+			       NV_DMA_IN_MEMORY, &args, sizeof(args),
+			       &ntfy->object);
+	client->route = NVDRM_OBJECT_NVIF;
+	if (ret)
+		goto done;
+
+	info->offset = ntfy->node->offset;
+done:
+	if (ret)
+		nouveau_abi16_ntfy_fini(chan, ntfy);
+	return nouveau_abi16_put(abi16, ret);
+}
+
+int
+nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
+{
+	struct drm_nouveau_gpuobj_free *fini = data;
+	struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
+	struct nouveau_abi16_chan *chan;
+	struct nouveau_abi16_ntfy *ntfy;
+	int ret = -ENOENT;
+
+	if (unlikely(!abi16))
+		return -ENOMEM;
+
+	chan = nouveau_abi16_chan(abi16, fini->channel);
+	if (!chan)
+		return nouveau_abi16_put(abi16, -EINVAL);
+
+	/* synchronize with the user channel and destroy the gpu object */
+	nouveau_channel_idle(chan->chan);
+
+	list_for_each_entry(ntfy, &chan->notifiers, head) {
+		if (ntfy->object.handle == fini->handle) {
+			nouveau_abi16_ntfy_fini(chan, ntfy);
+			ret = 0;
+			break;
+		}
+	}
+
+	return nouveau_abi16_put(abi16, ret);
+}