1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/core/event.c b/drivers/gpu/drm/nouveau/nvkm/core/event.c
new file mode 100644
index 000000000000..4e8d3fa042df
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/core/event.c
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2013-2014 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 <core/event.h>
+#include <core/notify.h>
+
+void
+nvkm_event_put(struct nvkm_event *event, u32 types, int index)
+{
+	assert_spin_locked(&event->refs_lock);
+	while (types) {
+		int type = __ffs(types); types &= ~(1 << type);
+		if (--event->refs[index * event->types_nr + type] == 0) {
+			if (event->func->fini)
+				event->func->fini(event, 1 << type, index);
+		}
+	}
+}
+
+void
+nvkm_event_get(struct nvkm_event *event, u32 types, int index)
+{
+	assert_spin_locked(&event->refs_lock);
+	while (types) {
+		int type = __ffs(types); types &= ~(1 << type);
+		if (++event->refs[index * event->types_nr + type] == 1) {
+			if (event->func->init)
+				event->func->init(event, 1 << type, index);
+		}
+	}
+}
+
+void
+nvkm_event_send(struct nvkm_event *event, u32 types, int index,
+		void *data, u32 size)
+{
+	struct nvkm_notify *notify;
+	unsigned long flags;
+
+	if (!event->refs || WARN_ON(index >= event->index_nr))
+		return;
+
+	spin_lock_irqsave(&event->list_lock, flags);
+	list_for_each_entry(notify, &event->list, head) {
+		if (notify->index == index && (notify->types & types)) {
+			if (event->func->send) {
+				event->func->send(data, size, notify);
+				continue;
+			}
+			nvkm_notify_send(notify, data, size);
+		}
+	}
+	spin_unlock_irqrestore(&event->list_lock, flags);
+}
+
+void
+nvkm_event_fini(struct nvkm_event *event)
+{
+	if (event->refs) {
+		kfree(event->refs);
+		event->refs = NULL;
+	}
+}
+
+int
+nvkm_event_init(const struct nvkm_event_func *func, int types_nr, int index_nr,
+		struct nvkm_event *event)
+{
+	event->refs = kzalloc(sizeof(*event->refs) * index_nr * types_nr,
+			      GFP_KERNEL);
+	if (!event->refs)
+		return -ENOMEM;
+
+	event->func = func;
+	event->types_nr = types_nr;
+	event->index_nr = index_nr;
+	spin_lock_init(&event->refs_lock);
+	spin_lock_init(&event->list_lock);
+	INIT_LIST_HEAD(&event->list);
+	return 0;
+}