- transition from "ioctl" interfaces

Signed-off-by: Ben Skeggs <bske...@nvidia.com>
---
 drivers/gpu/drm/nouveau/dispnv04/disp.c       |   2 +-
 drivers/gpu/drm/nouveau/include/nvif/chan.h   |  10 ++
 .../gpu/drm/nouveau/include/nvif/driverif.h   |  11 ++
 drivers/gpu/drm/nouveau/nouveau_abi16.c       |  31 ++---
 drivers/gpu/drm/nouveau/nouveau_abi16.h       |   4 +-
 drivers/gpu/drm/nouveau/nouveau_bo.c          |   9 +-
 drivers/gpu/drm/nouveau/nouveau_chan.c        |  11 +-
 drivers/gpu/drm/nouveau/nouveau_chan.h        |   4 +-
 drivers/gpu/drm/nouveau/nouveau_dmem.c        |   2 +-
 drivers/gpu/drm/nouveau/nouveau_drm.c         |  18 ++-
 drivers/gpu/drm/nouveau/nouveau_drv.h         |   3 +-
 drivers/gpu/drm/nouveau/nv04_fence.c          |   2 +-
 drivers/gpu/drm/nouveau/nvif/chan.c           |  51 +++++++
 .../gpu/drm/nouveau/nvkm/engine/fifo/uchan.c  | 124 ++++++++++++------
 14 files changed, 200 insertions(+), 82 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv04/disp.c 
b/drivers/gpu/drm/nouveau/dispnv04/disp.c
index e8b27bb135e7..3e10ba2ed20f 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/disp.c
@@ -236,7 +236,7 @@ nv04_display_create(struct drm_device *dev)
 
        /* Request page flip completion event. */
        if (drm->channel) {
-               ret = nvif_event_ctor(&drm->channel->nvsw, "kmsFlip", 0, 
nv04_flip_complete,
+               ret = nvif_event_ctor(&drm->channel->nvsw.object, "kmsFlip", 0, 
nv04_flip_complete,
                                      true, NULL, 0, &disp->flip);
                if (ret)
                        return ret;
diff --git a/drivers/gpu/drm/nouveau/include/nvif/chan.h 
b/drivers/gpu/drm/nouveau/include/nvif/chan.h
index 1115318f8b9d..d43c6ba2a35e 100644
--- a/drivers/gpu/drm/nouveau/include/nvif/chan.h
+++ b/drivers/gpu/drm/nouveau/include/nvif/chan.h
@@ -32,4 +32,14 @@ int nvif_chan_event_ctor(struct nvif_chan *, const char 
*name,
 
 int nvif_chan_ctxdma_ctor(struct nvif_chan *, const char *name, u32 handle, 
s32 oclass,
                          void *argv, u32 argc, struct nvif_ctxdma *);
+
+struct nvif_engobj {
+       const struct nvif_engobj_impl *impl;
+       struct nvif_engobj_priv *priv;
+       struct nvif_object object;
+};
+
+int nvif_engobj_ctor(struct nvif_chan *chan, const char *name, u32 handle, s32 
oclass,
+                    struct nvif_engobj *);
+void nvif_engobj_dtor(struct nvif_engobj *);
 #endif
diff --git a/drivers/gpu/drm/nouveau/include/nvif/driverif.h 
b/drivers/gpu/drm/nouveau/include/nvif/driverif.h
index 8e805633ded5..69428a879c37 100644
--- a/drivers/gpu/drm/nouveau/include/nvif/driverif.h
+++ b/drivers/gpu/drm/nouveau/include/nvif/driverif.h
@@ -21,6 +21,7 @@ struct nvif_disp_chan_priv;
 struct nvif_ctxdma_priv;
 struct nvif_cgrp_priv;
 struct nvif_chan_priv;
+struct nvif_engobj_priv;
 
 struct nvif_driver {
        const char *name;
@@ -431,6 +432,10 @@ struct nvif_disp_impl {
        } chan;
 };
 
+struct nvif_engobj_impl {
+       void (*del)(struct nvif_engobj_priv *);
+};
+
 struct nvif_chan_impl {
        void (*del)(struct nvif_chan_priv *);
 
@@ -460,6 +465,12 @@ struct nvif_chan_impl {
                int (*new)(struct nvif_chan_priv *, u32 handle, s32 oclass, 
void *argv, u32 argc,
                           const struct nvif_ctxdma_impl **, struct 
nvif_ctxdma_priv **);
        } ctxdma;
+
+       struct {
+               int (*new)(struct nvif_chan_priv *, u32 handle, u8 engi, s32 
oclass,
+                          const struct nvif_engobj_impl **, struct 
nvif_engobj_priv **,
+                          u64 object);
+       } engobj;
 };
 
 struct nvif_cgrp_impl {
diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c 
b/drivers/gpu/drm/nouveau/nouveau_abi16.c
index ff310b48fa34..8cc7b2410a04 100644
--- a/drivers/gpu/drm/nouveau/nouveau_abi16.c
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c
@@ -81,9 +81,7 @@ struct nouveau_abi16_obj {
        u64 object;
 
        union {
-               struct {
-                       struct nvif_object object;
-               } engobj;
+               struct nvif_engobj engobj;
        };
 
        struct list_head head;
@@ -141,7 +139,7 @@ nouveau_abi16_ntfy_fini(struct nouveau_abi16_chan *chan,
        if (ntfy->ctxdma.impl)
                nvif_ctxdma_dtor(&ntfy->ctxdma);
        else
-               nvif_object_dtor(&ntfy->engobj);
+               nvif_engobj_dtor(&ntfy->engobj);
        nvkm_mm_free(&chan->heap, &ntfy->node);
        list_del(&ntfy->head);
        kfree(ntfy);
@@ -179,7 +177,7 @@ nouveau_abi16_chan_fini(struct nouveau_abi16 *abi16,
 
        /* destroy channel object, all children will be killed too */
        if (chan->chan) {
-               nvif_object_dtor(&chan->ce);
+               nvif_engobj_dtor(&chan->ce);
                nouveau_channel_del(&chan->chan);
        }
 
@@ -400,7 +398,7 @@ nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
        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].handle = chan->chan->nvsw.object.handle;
                init->subchan[1].grclass = 0x506e;
                init->nr_subchan = 2;
        }
@@ -415,14 +413,14 @@ nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
         */
        switch (device->info.family) {
        case NV_DEVICE_INFO_V0_VOLTA:
-               ret = nvif_object_ctor(&chan->chan->chan.object, "abi16CeWar", 
0, VOLTA_DMA_COPY_A,
-                                      NULL, 0, &chan->ce);
+               ret = nvif_engobj_ctor(&chan->chan->chan, "abi16CeWar", 0, 
VOLTA_DMA_COPY_A,
+                                      &chan->ce);
                if (ret)
                        goto done;
                break;
        case NV_DEVICE_INFO_V0_TURING:
-               ret = nvif_object_ctor(&chan->chan->chan.object, "abi16CeWar", 
0, TURING_DMA_COPY_A,
-                                      NULL, 0, &chan->ce);
+               ret = nvif_engobj_ctor(&chan->chan->chan, "abi16CeWar", 0, 
TURING_DMA_COPY_A,
+                                      &chan->ce);
                if (ret)
                        goto done;
                break;
@@ -536,8 +534,8 @@ nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
 
        list_add(&ntfy->head, &chan->notifiers);
 
-       ret = nvif_object_ctor(&chan->chan->chan.object, "abi16EngObj", 
init->handle,
-                              oclass, NULL, 0, &ntfy->engobj);
+       ret = nvif_engobj_ctor(&chan->chan->chan, "abi16EngObj", init->handle, 
oclass,
+                              &ntfy->engobj);
 
        if (ret)
                nouveau_abi16_ntfy_fini(chan, ntfy);
@@ -680,8 +678,11 @@ nouveau_abi16_ioctl_del(struct nouveau_abi16 *abi16, 
struct nvif_ioctl_v0 *ioctl
                return -EINVAL;
 
        obj = nouveau_abi16_obj_find(abi16, ioctl->object);
-       if (obj)
+       if (obj) {
+               if (obj->type == ENGOBJ)
+                       nvif_engobj_dtor(&obj->engobj);
                nouveau_abi16_obj_del(obj);
+       }
 
        return 0;
 }
@@ -721,8 +722,8 @@ nouveau_abi16_ioctl_new(struct nouveau_abi16 *abi16, struct 
nvif_ioctl_v0 *ioctl
        if (IS_ERR(obj))
                return PTR_ERR(obj);
 
-       ret = nvif_object_ctor(&chan->chan->chan.object, "abi16EngObj", 
args->handle, args->oclass,
-                              NULL, 0, &obj->engobj.object);
+       ret = nvif_engobj_ctor(&chan->chan->chan, "abi16EngObj", args->handle, 
args->oclass,
+                              &obj->engobj);
        if (ret)
                nouveau_abi16_obj_del(obj);
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.h 
b/drivers/gpu/drm/nouveau/nouveau_abi16.h
index fdf239545c41..c37d304e3f5f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_abi16.h
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.h
@@ -14,7 +14,7 @@ int nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS);
 
 struct nouveau_abi16_ntfy {
        struct nvif_ctxdma ctxdma;
-       struct nvif_object engobj;
+       struct nvif_engobj engobj;
        struct list_head head;
        struct nvkm_mm_node *node;
 };
@@ -22,7 +22,7 @@ struct nouveau_abi16_ntfy {
 struct nouveau_abi16_chan {
        struct list_head head;
        struct nouveau_channel *chan;
-       struct nvif_object ce;
+       struct nvif_engobj ce;
        struct list_head notifiers;
        struct nouveau_bo *ntfy;
        struct nouveau_vma *ntfy_vma;
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c 
b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 6c5426fe2007..a94735ec3a9e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -965,14 +965,13 @@ nouveau_bo_move_init(struct nouveau_drm *drm)
                if (chan == NULL)
                        continue;
 
-               ret = nvif_object_ctor(&chan->chan.object, "ttmBoMove",
-                                      mthd->oclass | (mthd->engine << 16),
-                                      mthd->oclass, NULL, 0,
+               ret = nvif_engobj_ctor(&chan->chan, "ttmBoMove",
+                                      (mthd->engine << 16) | mthd->oclass, 
mthd->oclass,
                                       &drm->ttm.copy);
                if (ret == 0) {
-                       ret = mthd->init(chan, drm->ttm.copy.handle);
+                       ret = mthd->init(chan, drm->ttm.copy.object.handle);
                        if (ret) {
-                               nvif_object_dtor(&drm->ttm.copy);
+                               nvif_engobj_dtor(&drm->ttm.copy);
                                continue;
                        }
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_chan.c 
b/drivers/gpu/drm/nouveau/nouveau_chan.c
index 5ac0756714c1..80099dfcd3d5 100644
--- a/drivers/gpu/drm/nouveau/nouveau_chan.c
+++ b/drivers/gpu/drm/nouveau/nouveau_chan.c
@@ -95,8 +95,8 @@ nouveau_channel_del(struct nouveau_channel **pchan)
                if (chan->chan.impl)
                        nouveau_svmm_part(chan->vmm->svmm, chan->inst);
 
-               nvif_object_dtor(&chan->blit);
-               nvif_object_dtor(&chan->nvsw);
+               nvif_engobj_dtor(&chan->blit);
+               nvif_engobj_dtor(&chan->nvsw);
                nvif_ctxdma_dtor(&chan->gart);
                nvif_ctxdma_dtor(&chan->vram);
                nvif_event_dtor(&chan->kill);
@@ -459,9 +459,8 @@ nouveau_channel_init(struct nouveau_channel *chan, u32 
vram, u32 gart)
 
        /* allocate software object class (used for fences on <= nv05) */
        if (device->info.family < NV_DEVICE_INFO_V0_CELSIUS) {
-               ret = nvif_object_ctor(&chan->chan.object, "abi16NvswFence", 
0x006e,
-                                      NVIF_CLASS_SW_NV04,
-                                      NULL, 0, &chan->nvsw);
+               ret = nvif_engobj_ctor(&chan->chan, "abi16NvswFence", 0x006e,
+                                      NVIF_CLASS_SW_NV04, &chan->nvsw);
                if (ret)
                        return ret;
 
@@ -469,7 +468,7 @@ nouveau_channel_init(struct nouveau_channel *chan, u32 
vram, u32 gart)
                if (ret)
                        return ret;
 
-               PUSH_NVSQ(&chan->chan.push, NV_SW, 0x0000, chan->nvsw.handle);
+               PUSH_NVSQ(&chan->chan.push, NV_SW, 0x0000, 
chan->nvsw.object.handle);
                PUSH_KICK(&chan->chan.push);
        }
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_chan.h 
b/drivers/gpu/drm/nouveau/nouveau_chan.h
index 1340c64c4357..b1dbffd93894 100644
--- a/drivers/gpu/drm/nouveau/nouveau_chan.h
+++ b/drivers/gpu/drm/nouveau/nouveau_chan.h
@@ -26,7 +26,7 @@ struct nouveau_channel {
 
        struct nvif_ctxdma vram;
        struct nvif_ctxdma gart;
-       struct nvif_object nvsw;
+       struct nvif_engobj nvsw;
 
        struct {
                struct nouveau_bo *buffer;
@@ -52,7 +52,7 @@ struct nouveau_channel {
        u32 user_get;
        u32 user_put;
 
-       struct nvif_object blit;
+       struct nvif_engobj blit;
 
        struct nvif_event kill;
        atomic_t killed;
diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c 
b/drivers/gpu/drm/nouveau/nouveau_dmem.c
index fed91756846f..a0c24456e031 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dmem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c
@@ -570,7 +570,7 @@ nvc0b5_migrate_clear(struct nouveau_drm *drm, u32 length,
 static int
 nouveau_dmem_migrate_init(struct nouveau_drm *drm)
 {
-       switch (drm->ttm.copy.oclass) {
+       switch (drm->ttm.copy.object.oclass) {
        case PASCAL_DMA_COPY_A:
        case PASCAL_DMA_COPY_B:
        case  VOLTA_DMA_COPY_A:
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c 
b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 28347aa056b8..ae6b992c32f9 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -257,7 +257,7 @@ static void
 nouveau_accel_ce_fini(struct nouveau_drm *drm)
 {
        nouveau_channel_idle(drm->cechan);
-       nvif_object_dtor(&drm->ttm.copy);
+       nvif_engobj_dtor(&drm->ttm.copy);
        nouveau_channel_del(&drm->cechan);
 }
 
@@ -315,15 +315,13 @@ nouveau_accel_gr_init(struct nouveau_drm *drm)
         * synchronisation of page flips, as well as to implement fences
         * on TNT/TNT2 HW that lacks any kind of support in host.
         */
-       if (!drm->channel->nvsw.client && device->info.family < 
NV_DEVICE_INFO_V0_TESLA) {
-               ret = nvif_object_ctor(&drm->channel->chan.object, "drmNvsw",
-                                      NVDRM_NVSW, nouveau_abi16_swclass(drm),
-                                      NULL, 0, &drm->channel->nvsw);
+       if (device->info.family < NV_DEVICE_INFO_V0_TESLA) {
+               ret = nvif_engobj_ctor(&drm->channel->chan, "drmNvSw", 
NVDRM_NVSW,
+                                      nouveau_abi16_swclass(drm), 
&drm->channel->nvsw);
 
                if (ret == 0 && device->info.chipset >= 0x11) {
-                       ret = nvif_object_ctor(&drm->channel->chan.object, 
"drmBlit",
-                                              0x005f, 0x009f,
-                                              NULL, 0, &drm->channel->blit);
+                       ret = nvif_engobj_ctor(&drm->channel->chan, "drmBlit", 
0x005f, 0x009f,
+                                              &drm->channel->blit);
                }
 
                if (ret == 0) {
@@ -332,12 +330,12 @@ nouveau_accel_gr_init(struct nouveau_drm *drm)
                        ret = PUSH_WAIT(push, 8);
                        if (ret == 0) {
                                if (device->info.chipset >= 0x11) {
-                                       PUSH_NVSQ(push, NV05F, 0x0000, 
drm->channel->blit.handle);
+                                       PUSH_NVSQ(push, NV05F, 0x0000, 0x005f);
                                        PUSH_NVSQ(push, NV09F, 0x0120, 0,
                                                               0x0124, 1,
                                                               0x0128, 2);
                                }
-                               PUSH_NVSQ(push, NV_SW, 0x0000, 
drm->channel->nvsw.handle);
+                               PUSH_NVSQ(push, NV_SW, 0x0000, 
drm->channel->nvsw.object.handle);
                        }
                }
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h 
b/drivers/gpu/drm/nouveau/nouveau_drv.h
index 3d661148943c..e40416c884a8 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -40,6 +40,7 @@
 
 #include <linux/notifier.h>
 
+#include <nvif/chan.h>
 #include <nvif/client.h>
 #include <nvif/ctxdma.h>
 #include <nvif/device.h>
@@ -237,7 +238,7 @@ struct nouveau_drm {
                            struct ttm_buffer_object *,
                            struct ttm_resource *, struct ttm_resource *);
                struct nouveau_channel *chan;
-               struct nvif_object copy;
+               struct nvif_engobj copy;
                int mtrr;
                int type_vram;
                int type_host[2];
diff --git a/drivers/gpu/drm/nouveau/nv04_fence.c 
b/drivers/gpu/drm/nouveau/nv04_fence.c
index fa5c6029f783..802a051428e2 100644
--- a/drivers/gpu/drm/nouveau/nv04_fence.c
+++ b/drivers/gpu/drm/nouveau/nv04_fence.c
@@ -59,7 +59,7 @@ static u32
 nv04_fence_read(struct nouveau_channel *chan)
 {
        struct nv04_nvsw_get_ref_v0 args = {};
-       WARN_ON(nvif_object_mthd(&chan->nvsw, NV04_NVSW_GET_REF,
+       WARN_ON(nvif_object_mthd(&chan->nvsw.object, NV04_NVSW_GET_REF,
                                 &args, sizeof(args)));
        return args.ref;
 }
diff --git a/drivers/gpu/drm/nouveau/nvif/chan.c 
b/drivers/gpu/drm/nouveau/nvif/chan.c
index 78f380ef01b7..ff4485ed0e89 100644
--- a/drivers/gpu/drm/nouveau/nvif/chan.c
+++ b/drivers/gpu/drm/nouveau/nvif/chan.c
@@ -24,6 +24,57 @@
 #include <nvif/ctxdma.h>
 #include <nvif/device.h>
 
+void
+nvif_engobj_dtor(struct nvif_engobj *engobj)
+{
+       if (!engobj->impl)
+               return;
+
+       engobj->impl->del(engobj->priv);
+       engobj->impl = NULL;
+}
+
+int
+nvif_engobj_ctor(struct nvif_chan *chan, const char *name, u32 handle, s32 
oclass,
+                struct nvif_engobj *engobj)
+{
+       const struct nvif_device_impl_fifo *fifo = &chan->device->impl->fifo;
+       const struct nvif_device_impl_runl *runl = &fifo->runl[chan->runl];
+       int ret = -ENODEV, engi;
+
+       for (engi = 0; engi < runl->engn_nr; engi++) {
+               int engine = runl->engn[engi].engine;
+               int runq = 0;
+
+               for (int i = 0; i < fifo->engine[engine].oclass_nr; i++) {
+                       if (fifo->engine[engine].oclass[i] == oclass) {
+                               if (fifo->engine[engine].type == 
NVIF_ENGINE_CE) {
+                                       if (chan->runq != runq++)
+                                               continue;
+                               }
+
+                               ret = 0;
+                               break;
+                       }
+               }
+
+               if (ret == 0)
+                       break;
+       }
+
+       if (ret)
+               return ret;
+
+       ret = chan->impl->engobj.new(chan->priv, handle, engi, oclass, 
&engobj->impl,
+                                    &engobj->priv, 
nvif_handle(&engobj->object));
+       NVIF_ERRON(ret, &chan->object, "[NEW engobj handle:%08x oclass:%08x]", 
handle, oclass);
+       if (ret)
+               return ret;
+
+       nvif_object_ctor(&chan->object, name ?: "nvifEngObj", handle, oclass, 
&engobj->object);
+       return 0;
+}
+
 int
 nvif_chan_ctxdma_ctor(struct nvif_chan *chan, const char *name, u32 handle, 
s32 oclass,
                      void *argv, u32 argc, struct nvif_ctxdma *ctxdma)
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/uchan.c 
b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/uchan.c
index f6dfba41da8c..6e5a0d980446 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/uchan.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/uchan.c
@@ -46,6 +46,21 @@ struct nvkm_uobj {
        int hash;
 };
 
+static void
+nvkm_uchan_object_del(struct nvif_engobj_priv *priv)
+{
+       struct nvkm_uobj *uobj = (void *)priv;
+       struct nvkm_object *object = &uobj->oproxy.base;
+
+       nvkm_object_fini(object, false);
+       nvkm_object_del(&object);
+}
+
+static const struct nvif_engobj_impl
+nvkm_uchan_object_impl = {
+       .del = nvkm_uchan_object_del,
+};
+
 static int
 nvkm_uchan_object_fini_1(struct nvkm_oproxy *oproxy, bool suspend)
 {
@@ -162,7 +177,7 @@ nvkm_uchan_object_new(const struct nvkm_oclass *oclass, 
void *argv, u32 argc,
                                        .client = oclass->client,
                                        .parent = 
uobj->cctx->vctx->ectx->object ?: oclass->parent,
                                        .engine = engn->engine,
-                                }, argv, argc, &uobj->oproxy.object);
+                                }, NULL, 0, &uobj->oproxy.object);
        if (ret)
                return ret;
 
@@ -176,54 +191,87 @@ nvkm_uchan_object_new(const struct nvkm_oclass *oclass, 
void *argv, u32 argc,
 }
 
 static int
-nvkm_uchan_sclass(struct nvkm_object *object, int index, struct nvkm_oclass 
*oclass)
+nvkm_uchan_engobj_new(struct nvif_chan_priv *uchan, u32 handle, u8 engi, s32 
oclass,
+                     const struct nvif_engobj_impl **pimpl, struct 
nvif_engobj_priv **ppriv,
+                     u64 _handle)
 {
-       struct nvkm_chan *chan = container_of(object, struct nvif_chan_priv, 
object)->chan;
-       struct nvkm_engn *engn;
-       int ret, runq = 0;
+       struct nvkm_chan *chan = uchan->chan;
+       struct nvkm_runl *runl = chan->cgrp->runl;
+       struct nvkm_engn *engt, *engn = NULL;
+       struct nvkm_engine *engine;
+       struct nvkm_oclass _oclass = {};
+       struct nvkm_object *object = NULL;
+       int ret, i = 0;
 
-       nvkm_runl_foreach_engn(engn, chan->cgrp->runl) {
-               struct nvkm_engine *engine = engn->engine;
-               int c = 0;
+       nvkm_runl_foreach_engn(engt, runl) {
+               if (i++ == engi) {
+                       engn = engt;
+                       break;
+               }
+       }
+
+       if (!engn)
+               return -EINVAL;
 
-               /* Each runqueue, on runlists with multiple, has its own LCE. */
-               if (engn->runl->func->runqs) {
-                       if (engine->subdev.type == NVKM_ENGINE_CE) {
-                               if (chan->runq != runq++)
-                                       continue;
+       engine = engn->engine;
+
+       _oclass.handle = handle;
+       _oclass.client = uchan->object.client;
+       _oclass.parent = &uchan->object;
+       _oclass.engine = engine;
+
+       if (engine->func->fifo.sclass) {
+               i = 0;
+               do {
+                       _oclass.base.oclass = 0;
+                       engine->func->fifo.sclass(&_oclass, i++);
+                       if (_oclass.base.oclass == oclass)
+                               break;
+               } while (_oclass.base.oclass);
+       } else {
+               for (i = 0; engine->func->sclass[i].oclass; i++) {
+                       if (engine->func->sclass[i].oclass == oclass) {
+                               _oclass.base = engine->func->sclass[i];
+                               break;
                        }
                }
+       }
 
-               oclass->engine = engine;
-               oclass->base.oclass = 0;
+       if (!_oclass.base.oclass)
+               return -EINVAL;
 
-               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;
-                       }
+       if (!_oclass.base.ctor)
+               _oclass.base.ctor = nvkm_object_new;
 
-                       index -= ret;
-                       continue;
-               }
+       if (engine) {
+               _oclass.engine = nvkm_engine_ref(engine);
+               if (IS_ERR(_oclass.engine))
+                       return PTR_ERR(_oclass.engine);
+       }
 
-               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;
-                       }
-               }
+       ret = nvkm_uchan_object_new(&_oclass, NULL, 0, &object);
+       nvkm_engine_unref(&_oclass.engine);
+       if (ret)
+               goto done;
 
-               index -= c;
+       ret = nvkm_object_init(object);
+       if (ret) {
+               nvkm_object_fini(object, false);
+               goto done;
        }
 
-       return -EINVAL;
+       *pimpl = &nvkm_uchan_object_impl;
+       *ppriv = (void *)container_of(object, struct nvkm_uobj, oproxy.base);
+
+       ret = nvkm_object_link_rb(uchan->object.client, &uchan->object, 
_handle, object);
+       if (ret)
+               nvkm_object_fini(object, false);
+
+done:
+       if (ret)
+               nvkm_object_del(&object);
+
+       return ret;
 }
 
 static void
@@ -310,6 +358,7 @@ nvkm_uchan_impl = {
        .del = nvkm_uchan_del,
        .event.killed = nvkm_uchan_event_killed,
        .ctxdma.new = nvkm_uchan_ctxdma_new,
+       .engobj.new = nvkm_uchan_engobj_new,
 };
 
 static int
@@ -356,7 +405,6 @@ nvkm_uchan = {
        .dtor = nvkm_uchan_dtor,
        .init = nvkm_uchan_init,
        .fini = nvkm_uchan_fini,
-       .sclass = nvkm_uchan_sclass,
 };
 
 struct nvkm_chan *
-- 
2.41.0

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