1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/core/event.h b/drivers/gpu/drm/nouveau/include/nvkm/core/event.h
new file mode 100644
index 000000000..460459af2
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/include/nvkm/core/event.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: MIT */
+#ifndef __NVKM_EVENT_H__
+#define __NVKM_EVENT_H__
+#include <core/os.h>
+struct nvkm_object;
+struct nvkm_oclass;
+struct nvkm_uevent;
+
+struct nvkm_event {
+	const struct nvkm_event_func *func;
+	struct nvkm_subdev *subdev;
+
+	int types_nr;
+	int index_nr;
+
+	spinlock_t refs_lock;
+	rwlock_t list_lock;
+	int *refs;
+
+	struct list_head ntfy;
+};
+
+struct nvkm_event_func {
+	void (*init)(struct nvkm_event *, int type, int index);
+	void (*fini)(struct nvkm_event *, int type, int index);
+};
+
+int  __nvkm_event_init(const struct nvkm_event_func *func, struct nvkm_subdev *, int types_nr,
+		       int index_nr, struct nvkm_event *);
+
+/* Each nvkm_event needs its own lockdep class due to inter-dependencies, to
+ * prevent lockdep false-positives.
+ *
+ * Inlining the spinlock initialisation ensures each is unique.
+ */
+static __always_inline int
+nvkm_event_init(const struct nvkm_event_func *func, struct nvkm_subdev *subdev,
+		int types_nr, int index_nr, struct nvkm_event *event)
+{
+	spin_lock_init(&event->refs_lock);
+	rwlock_init(&event->list_lock);
+	return __nvkm_event_init(func, subdev, types_nr, index_nr, event);
+}
+
+void nvkm_event_fini(struct nvkm_event *);
+
+#define NVKM_EVENT_KEEP 0
+#define NVKM_EVENT_DROP 1
+struct nvkm_event_ntfy;
+typedef int (*nvkm_event_func)(struct nvkm_event_ntfy *, u32 bits);
+
+struct nvkm_event_ntfy {
+	struct nvkm_event *event;
+	int id;
+	u32 bits;
+	bool wait;
+	nvkm_event_func func;
+
+	atomic_t allowed;
+	bool running;
+
+	struct list_head head;
+};
+
+void nvkm_event_ntfy(struct nvkm_event *, int id, u32 bits);
+bool nvkm_event_ntfy_valid(struct nvkm_event *, int id, u32 bits);
+void nvkm_event_ntfy_add(struct nvkm_event *, int id, u32 bits, bool wait, nvkm_event_func,
+			 struct nvkm_event_ntfy *);
+void nvkm_event_ntfy_del(struct nvkm_event_ntfy *);
+void nvkm_event_ntfy_allow(struct nvkm_event_ntfy *);
+void nvkm_event_ntfy_block(struct nvkm_event_ntfy *);
+
+typedef int (*nvkm_uevent_func)(struct nvkm_object *, u64 token, u32 bits);
+
+int nvkm_uevent_new(const struct nvkm_oclass *, void *argv, u32 argc, struct nvkm_object **);
+int nvkm_uevent_add(struct nvkm_uevent *, struct nvkm_event *, int id, u32 bits, nvkm_uevent_func);
+#endif