drm/nouveau/nvkm: add a replacement for nvkm_notify

This replaces the twisty, confusing, relationship between nvkm_event and
nvkm_notify with something much simpler, and less racey.  It also places
events in the object tree hierarchy, which will allow a heap of the code
tracking events across allocation/teardown/suspend to be removed.

This commit just adds the new interfaces, and passes the owning subdev to
the event constructor to enable debug-tracing in the new code.

v2:
- use ?: (lyude)

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

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/core/object.h b/drivers/gpu/drm/nouveau/include/nvkm/core/object.h
index 7efcd5d2f2ff..ed1f66360782 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/core/object.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/core/object.h
@@ -4,6 +4,7 @@
 #include <core/oclass.h>
 struct nvkm_event;
 struct nvkm_gpuobj;
+struct nvkm_uevent;
 
 struct nvkm_object {
 	const struct nvkm_object_func *func;
@@ -43,6 +44,7 @@ struct nvkm_object_func {
 	int (*bind)(struct nvkm_object *, struct nvkm_gpuobj *, int align,
 		    struct nvkm_gpuobj **);
 	int (*sclass)(struct nvkm_object *, int index, struct nvkm_oclass *);
+	int (*uevent)(struct nvkm_object *, void *argv, u32 argc, struct nvkm_uevent *);
 };
 
 void nvkm_object_ctor(const struct nvkm_object_func *,