drm/nouveau/fifo: use runlist engine info to lookup engine classes

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

22 files changed, 35 insertions, 146 deletions

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h b/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h
index 62fe64dab11a..446d058f558a 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h
@@ -22,7 +22,6 @@ struct nvkm_chan {
 	union { int id; int chid; }; /*FIXME: remove later */
 
 	struct nvkm_fifo *fifo;
-	u32 engm;
 	struct nvkm_object object;
 
 	struct list_head head;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c
index e2178a8f78a7..5fabf7373079 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.c
@@ -217,50 +217,6 @@ nvkm_fifo_chan_child_new(const struct nvkm_oclass *oclass, void *data, u32 size,
 }
 
 static int
-nvkm_fifo_chan_child_get(struct nvkm_object *object, int index,
-			 struct nvkm_oclass *oclass)
-{
-	struct nvkm_fifo_chan *chan = nvkm_fifo_chan(object);
-	struct nvkm_fifo *fifo = chan->fifo;
-	struct nvkm_engine *engine;
-	u32 engm = chan->engm;
-	int engi, ret, c;
-
-	for (; c = 0, engi = __ffs(engm), engm; engm &= ~(1ULL << engi)) {
-		if (!(engine = fifo->func->id_engine(fifo, engi)))
-			continue;
-		oclass->engine = engine;
-		oclass->base.oclass = 0;
-
-		if (engine->func->fifo.sclass) {
-			ret = engine->func->fifo.sclass(oclass, index);
-			if (oclass->base.oclass) {
-				if (!oclass->base.ctor)
-					oclass->base.ctor = nvkm_object_new;
-				oclass->ctor = nvkm_fifo_chan_child_new;
-				return 0;
-			}
-
-			index -= ret;
-			continue;
-		}
-
-		while (engine->func->sclass[c].oclass) {
-			if (c++ == index) {
-				oclass->base = engine->func->sclass[index];
-				if (!oclass->base.ctor)
-					oclass->base.ctor = nvkm_object_new;
-				oclass->ctor = nvkm_fifo_chan_child_new;
-				return 0;
-			}
-		}
-		index -= c;
-	}
-
-	return -EINVAL;
-}
-
-static int
 nvkm_fifo_chan_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent)
 {
 	struct nvkm_fifo_chan *chan = nvkm_fifo_chan(object);
@@ -355,7 +311,6 @@ nvkm_fifo_chan_func = {
 	.init = nvkm_fifo_chan_init,
 	.fini = nvkm_fifo_chan_fini,
 	.map = nvkm_fifo_chan_map,
-	.sclass = nvkm_fifo_chan_child_get,
 	.uevent = nvkm_fifo_chan_uevent,
 };
 
@@ -407,7 +362,6 @@ nvkm_fifo_chan_ctor(const struct nvkm_fifo_chan_func *fn,
 
 	nvkm_object_ctor(&nvkm_fifo_chan_func, oclass, &chan->object);
 	chan->fifo = fifo;
-	chan->engm = engm;
 	INIT_LIST_HEAD(&chan->head);
 
 	/* Join channel group.
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/g84.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/g84.c
index 3d242350fdee..122929b7d74f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/g84.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/g84.c
@@ -51,52 +51,6 @@ g84_fifo_uevent_init(struct nvkm_fifo *fifo)
 	nvkm_mask(device, 0x002140, 0x40000000, 0x40000000);
 }
 
-struct nvkm_engine *
-g84_fifo_id_engine(struct nvkm_fifo *fifo, int engi)
-{
-	struct nvkm_device *device = fifo->engine.subdev.device;
-	struct nvkm_engine *engine;
-	enum nvkm_subdev_type type;
-
-	switch (engi) {
-	case G84_FIFO_ENGN_SW    : type = NVKM_ENGINE_SW; break;
-	case G84_FIFO_ENGN_GR    : type = NVKM_ENGINE_GR; break;
-	case G84_FIFO_ENGN_MPEG  :
-		if ((engine = nvkm_device_engine(device, NVKM_ENGINE_MSPPP, 0)))
-			return engine;
-		type = NVKM_ENGINE_MPEG;
-		break;
-	case G84_FIFO_ENGN_ME    :
-		if ((engine = nvkm_device_engine(device, NVKM_ENGINE_CE, 0)))
-			return engine;
-		type = NVKM_ENGINE_ME;
-		break;
-	case G84_FIFO_ENGN_VP    :
-		if ((engine = nvkm_device_engine(device, NVKM_ENGINE_MSPDEC, 0)))
-			return engine;
-		type = NVKM_ENGINE_VP;
-		break;
-	case G84_FIFO_ENGN_CIPHER:
-		if ((engine = nvkm_device_engine(device, NVKM_ENGINE_VIC, 0)))
-			return engine;
-		if ((engine = nvkm_device_engine(device, NVKM_ENGINE_SEC, 0)))
-			return engine;
-		type = NVKM_ENGINE_CIPHER;
-		break;
-	case G84_FIFO_ENGN_BSP   :
-		if ((engine = nvkm_device_engine(device, NVKM_ENGINE_MSVLD, 0)))
-			return engine;
-		type = NVKM_ENGINE_BSP;
-		break;
-	case G84_FIFO_ENGN_DMA   : type = NVKM_ENGINE_DMAOBJ; break;
-	default:
-		WARN_ON(1);
-		return NULL;
-	}
-
-	return nvkm_device_engine(fifo->engine.subdev.device, type, 0);
-}
-
 int
 g84_fifo_engine_id(struct nvkm_fifo *base, struct nvkm_engine *engine)
 {
@@ -149,7 +103,6 @@ g84_fifo = {
 	.init = nv50_fifo_init,
 	.intr = nv04_fifo_intr,
 	.engine_id = g84_fifo_engine_id,
-	.id_engine = g84_fifo_id_engine,
 	.pause = nv04_fifo_pause,
 	.start = nv04_fifo_start,
 	.uevent_init = g84_fifo_uevent_init,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/g98.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/g98.c
index 39177ec0eca6..118a773412fc 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/g98.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/g98.c
@@ -57,7 +57,6 @@ g98_fifo = {
 	.init = nv50_fifo_init,
 	.intr = nv04_fifo_intr,
 	.engine_id = g84_fifo_engine_id,
-	.id_engine = g84_fifo_id_engine,
 	.pause = nv04_fifo_pause,
 	.start = nv04_fifo_start,
 	.uevent_init = g84_fifo_uevent_init,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c
index 43cce02151d7..3d169f3ef512 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c
@@ -741,7 +741,6 @@ gf100_fifo = {
 	.intr = gf100_fifo_intr,
 	.mmu_fault = &gf100_fifo_mmu_fault,
 	.engine_id = gf100_fifo_engine_id,
-	.id_engine = gf100_fifo_id_engine,
 	.uevent_init = gf100_fifo_uevent_init,
 	.uevent_fini = gf100_fifo_uevent_fini,
 	.runl = &gf100_runl,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c
index b41481c984d1..9d66aafc2dd3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c
@@ -303,15 +303,6 @@ gk104_fifo_pbdma = {
 	.init = gk104_fifo_pbdma_init,
 };
 
-struct nvkm_engine *
-gk104_fifo_id_engine(struct nvkm_fifo *base, int engi)
-{
-	if (engi == GK104_FIFO_ENGN_SW)
-		return nvkm_device_engine(base->engine.subdev.device, NVKM_ENGINE_SW, 0);
-
-	return gk104_fifo(base)->engine[engi].engine;
-}
-
 int
 gk104_fifo_engine_id(struct nvkm_fifo *base, struct nvkm_engine *engine)
 {
@@ -1185,7 +1176,6 @@ gk104_fifo = {
 	.fault.hubclient = gk104_fifo_fault_hubclient,
 	.fault.gpcclient = gk104_fifo_fault_gpcclient,
 	.engine_id = gk104_fifo_engine_id,
-	.id_engine = gk104_fifo_id_engine,
 	.uevent_init = gk104_fifo_uevent_init,
 	.uevent_fini = gk104_fifo_uevent_fini,
 	.recover_chan = gk104_fifo_recover_chan,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk110.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk110.c
index 64bdd3fd3ae6..ed3aa170d429 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk110.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk110.c
@@ -93,7 +93,6 @@ gk110_fifo = {
 	.fault.hubclient = gk104_fifo_fault_hubclient,
 	.fault.gpcclient = gk104_fifo_fault_gpcclient,
 	.engine_id = gk104_fifo_engine_id,
-	.id_engine = gk104_fifo_id_engine,
 	.uevent_init = gk104_fifo_uevent_init,
 	.uevent_fini = gk104_fifo_uevent_fini,
 	.recover_chan = gk104_fifo_recover_chan,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk208.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk208.c
index 3e074a976c44..7219dc92f451 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk208.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk208.c
@@ -72,7 +72,6 @@ gk208_fifo = {
 	.fault.hubclient = gk104_fifo_fault_hubclient,
 	.fault.gpcclient = gk104_fifo_fault_gpcclient,
 	.engine_id = gk104_fifo_engine_id,
-	.id_engine = gk104_fifo_id_engine,
 	.uevent_init = gk104_fifo_uevent_init,
 	.uevent_fini = gk104_fifo_uevent_fini,
 	.recover_chan = gk104_fifo_recover_chan,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk20a.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk20a.c
index a494dacad37e..9dfa93d914e0 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk20a.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk20a.c
@@ -43,7 +43,6 @@ gk20a_fifo = {
 	.fault.hubclient = gk104_fifo_fault_hubclient,
 	.fault.gpcclient = gk104_fifo_fault_gpcclient,
 	.engine_id = gk104_fifo_engine_id,
-	.id_engine = gk104_fifo_id_engine,
 	.uevent_init = gk104_fifo_uevent_init,
 	.uevent_fini = gk104_fifo_uevent_fini,
 	.recover_chan = gk104_fifo_recover_chan,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gm107.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gm107.c
index c4a6972ee473..4b67fe1ed81a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gm107.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gm107.c
@@ -133,7 +133,6 @@ gm107_fifo = {
 	.fault.hubclient = gk104_fifo_fault_hubclient,
 	.fault.gpcclient = gk104_fifo_fault_gpcclient,
 	.engine_id = gk104_fifo_engine_id,
-	.id_engine = gk104_fifo_id_engine,
 	.uevent_init = gk104_fifo_uevent_init,
 	.uevent_fini = gk104_fifo_uevent_fini,
 	.recover_chan = gk104_fifo_recover_chan,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gm200.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gm200.c
index bc9893c4d297..5c81f8b8d6c0 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gm200.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gm200.c
@@ -63,7 +63,6 @@ gm200_fifo = {
 	.fault.hubclient = gk104_fifo_fault_hubclient,
 	.fault.gpcclient = gk104_fifo_fault_gpcclient,
 	.engine_id = gk104_fifo_engine_id,
-	.id_engine = gk104_fifo_id_engine,
 	.uevent_init = gk104_fifo_uevent_init,
 	.uevent_fini = gk104_fifo_uevent_fini,
 	.recover_chan = gk104_fifo_recover_chan,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gp100.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gp100.c
index 4ac4afbf3147..d90ba4170d98 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gp100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gp100.c
@@ -105,7 +105,6 @@ gp100_fifo = {
 	.fault.hubclient = gk104_fifo_fault_hubclient,
 	.fault.gpcclient = gk104_fifo_fault_gpcclient,
 	.engine_id = gk104_fifo_engine_id,
-	.id_engine = gk104_fifo_id_engine,
 	.uevent_init = gk104_fifo_uevent_init,
 	.uevent_fini = gk104_fifo_uevent_fini,
 	.recover_chan = gk104_fifo_recover_chan,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gv100.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gv100.c
index e1069c672438..c2b32688cbd1 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gv100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gv100.c
@@ -332,7 +332,6 @@ gv100_fifo = {
 	.fault.hubclient = gv100_fifo_fault_hubclient,
 	.fault.gpcclient = gv100_fifo_fault_gpcclient,
 	.engine_id = gk104_fifo_engine_id,
-	.id_engine = gk104_fifo_id_engine,
 	.uevent_init = gk104_fifo_uevent_init,
 	.uevent_fini = gk104_fifo_uevent_fini,
 	.recover_chan = gk104_fifo_recover_chan,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c
index 52fe9d5a5a4a..120eb8b7611f 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c
@@ -182,24 +182,6 @@ const struct nvkm_runl_func
 nv04_runl = {
 };
 
-struct nvkm_engine *
-nv04_fifo_id_engine(struct nvkm_fifo *fifo, int engi)
-{
-	enum nvkm_subdev_type type;
-
-	switch (engi) {
-	case NV04_FIFO_ENGN_SW  : type = NVKM_ENGINE_SW; break;
-	case NV04_FIFO_ENGN_GR  : type = NVKM_ENGINE_GR; break;
-	case NV04_FIFO_ENGN_MPEG: type = NVKM_ENGINE_MPEG; break;
-	case NV04_FIFO_ENGN_DMA : type = NVKM_ENGINE_DMAOBJ; break;
-	default:
-		WARN_ON(1);
-		return NULL;
-	}
-
-	return nvkm_device_engine(fifo->engine.subdev.device, type, 0);
-}
-
 int
 nv04_fifo_engine_id(struct nvkm_fifo *base, struct nvkm_engine *engine)
 {
@@ -500,7 +482,6 @@ nv04_fifo = {
 	.init = nv04_fifo_init,
 	.intr = nv04_fifo_intr,
 	.engine_id = nv04_fifo_engine_id,
-	.id_engine = nv04_fifo_id_engine,
 	.pause = nv04_fifo_pause,
 	.start = nv04_fifo_start,
 	.runl = &nv04_runl,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv10.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv10.c
index 84416440a822..0f7c88ae5a1c 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv10.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv10.c
@@ -61,7 +61,6 @@ nv10_fifo = {
 	.init = nv04_fifo_init,
 	.intr = nv04_fifo_intr,
 	.engine_id = nv04_fifo_engine_id,
-	.id_engine = nv04_fifo_id_engine,
 	.pause = nv04_fifo_pause,
 	.start = nv04_fifo_start,
 	.runl = &nv04_runl,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv17.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv17.c
index 28ae10a78ee4..59b752986ac1 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv17.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv17.c
@@ -93,7 +93,6 @@ nv17_fifo = {
 	.init = nv17_fifo_init,
 	.intr = nv04_fifo_intr,
 	.engine_id = nv04_fifo_engine_id,
-	.id_engine = nv04_fifo_id_engine,
 	.pause = nv04_fifo_pause,
 	.start = nv04_fifo_start,
 	.runl = &nv04_runl,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c
index 492609780c9b..d0fc6c528825 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c
@@ -133,7 +133,6 @@ nv40_fifo = {
 	.init = nv40_fifo_init,
 	.intr = nv04_fifo_intr,
 	.engine_id = nv04_fifo_engine_id,
-	.id_engine = nv04_fifo_id_engine,
 	.pause = nv04_fifo_pause,
 	.start = nv04_fifo_start,
 	.runl = &nv04_runl,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.c
index 4fcf49dbfd90..46013aea97d6 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.c
@@ -168,7 +168,6 @@ nv50_fifo = {
 	.init = nv50_fifo_init,
 	.intr = nv04_fifo_intr,
 	.engine_id = nv04_fifo_engine_id,
-	.id_engine = nv04_fifo_id_engine,
 	.pause = nv04_fifo_pause,
 	.start = nv04_fifo_start,
 	.runl = &nv50_runl,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.h b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.h
index 9a23a84ea7f4..b8f7201ba7f5 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.h
@@ -19,7 +19,6 @@ void nv50_fifo_init(struct nvkm_fifo *);
 void nv50_fifo_runlist_update(struct nv50_fifo *);
 
 int g84_fifo_engine_id(struct nvkm_fifo *, struct nvkm_engine *);
-struct nvkm_engine *g84_fifo_id_engine(struct nvkm_fifo *, int);
 void g84_fifo_uevent_init(struct nvkm_fifo *);
 void g84_fifo_uevent_fini(struct nvkm_fifo *);
 #endif
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/priv.h b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/priv.h
index b0fa9d1df91d..1b0a3027f297 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/priv.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/priv.h
@@ -44,7 +44,6 @@ struct nvkm_fifo_func {
 	} fault;
 
 	int (*engine_id)(struct nvkm_fifo *, struct nvkm_engine *);
-	struct nvkm_engine *(*id_engine)(struct nvkm_fifo *, int engi);
 	void (*pause)(struct nvkm_fifo *, unsigned long *);
 	void (*start)(struct nvkm_fifo *, unsigned long *);
 	void (*uevent_init)(struct nvkm_fifo *);
@@ -98,7 +97,6 @@ int nv04_fifo_runl_ctor(struct nvkm_fifo *);
 void nv04_fifo_init(struct nvkm_fifo *);
 void nv04_fifo_intr(struct nvkm_fifo *);
 int nv04_fifo_engine_id(struct nvkm_fifo *, struct nvkm_engine *);
-struct nvkm_engine *nv04_fifo_id_engine(struct nvkm_fifo *, int);
 void nv04_fifo_pause(struct nvkm_fifo *, unsigned long *);
 void nv04_fifo_start(struct nvkm_fifo *, unsigned long *);
 extern const struct nvkm_runl_func nv04_runl;
@@ -127,7 +125,6 @@ extern const struct nvkm_fifo_func_mmu_fault gk104_fifo_mmu_fault;
 void gk104_fifo_fault(struct nvkm_fifo *, struct nvkm_fault_data *);
 void gk104_fifo_recover_chan(struct nvkm_fifo *, int);
 int gk104_fifo_engine_id(struct nvkm_fifo *, struct nvkm_engine *);
-struct nvkm_engine *gk104_fifo_id_engine(struct nvkm_fifo *, int);
 extern const struct nvkm_runq_func gk104_runq;
 extern const struct nvkm_engn_func gk104_engn;
 extern const struct nvkm_engn_func gk104_engn_ce;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/tu102.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/tu102.c
index e5b9b1fc3866..f2c90c7dda7d 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/tu102.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/tu102.c
@@ -459,7 +459,6 @@ tu102_fifo = {
 	.fault.hubclient = gv100_fifo_fault_hubclient,
 	.fault.gpcclient = gv100_fifo_fault_gpcclient,
 	.engine_id = gk104_fifo_engine_id,
-	.id_engine = gk104_fifo_id_engine,
 	.uevent_init = gk104_fifo_uevent_init,
 	.uevent_fini = gk104_fifo_uevent_fini,
 	.recover_chan = tu102_fifo_recover_chan,
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/uchan.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/uchan.c
index 42b49043deef..6f920e0e1008 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/uchan.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/uchan.c
@@ -22,6 +22,7 @@
 #define nvkm_uchan(p) container_of((p), struct nvkm_uchan, object)
 #include "cgrp.h"
 #include "chan.h"
+#include "runl.h"
 
 #include <core/oproxy.h>
 
@@ -89,14 +90,43 @@ static int
 nvkm_uchan_sclass(struct nvkm_object *object, int index, struct nvkm_oclass *oclass)
 {
 	struct nvkm_chan *chan = nvkm_uchan(object)->chan;
+	struct nvkm_engn *engn;
 	int ret;
 
-	ret = chan->object.func->sclass(&chan->object, index, oclass);
-	if (ret)
-		return ret;
+	nvkm_runl_foreach_engn(engn, chan->cgrp->runl) {
+		struct nvkm_engine *engine = engn->engine;
+		int c = 0;
+
+		oclass->engine = engine;
+		oclass->base.oclass = 0;
+
+		if (engine->func->fifo.sclass) {
+			ret = engine->func->fifo.sclass(oclass, index);
+			if (oclass->base.oclass) {
+				if (!oclass->base.ctor)
+					oclass->base.ctor = nvkm_object_new;
+				oclass->ctor = nvkm_uchan_object_new;
+				return 0;
+			}
+
+			index -= ret;
+			continue;
+		}
+
+		while (engine->func->sclass[c].oclass) {
+			if (c++ == index) {
+				oclass->base = engine->func->sclass[index];
+				if (!oclass->base.ctor)
+					oclass->base.ctor = nvkm_object_new;
+				oclass->ctor = nvkm_uchan_object_new;
+				return 0;
+			}
+		}
+
+		index -= c;
+	}
 
-	oclass->ctor = nvkm_uchan_object_new;
-	return 0;
+	return -EINVAL;
 }
 
 static int