gpu: add information for etnaviv driver

Mesa queries information about the underlying device and this header
denotes the layout of the information. It is also used by the driver
itself to populate the 'info_dataspace'.

Issue #4329.

repos/os/include/gpu/info_etnaviv.h

@@ -0,0 +1,43 @@
+/*
+ * \brief  Gpu Information ETNAVIV
+ * \author Josef Soentgen
+ * \date   2021-09-20
+ */
+
+/*
+ * Copyright (C) 2021 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU Affero General Public License version 3.
+ */
+
+#ifndef _INCLUDE__GPU_INFO_ETNAVIV_H_
+#define _INCLUDE__GPU_INFO_ETNAVIV_H_
+
+#include <base/output.h>
+#include <session/session.h>
+#include <gpu_session/gpu_session.h>
+
+namespace Gpu {
+
+	struct Info_etnaviv;
+} /* namespace Gpu */
+
+
+/*
+ * Gpu information
+ *
+ * Used to query information in the DRM backend
+ */
+struct Gpu::Info_etnaviv
+{
+	/*
+	 * Size the array based on the list of params in
+	 * etnaviv_drm.h that allow for 1:1 access.
+	 */
+	enum { MAX_ETNAVIV_PARAMS = 32, };
+	using Param = Genode::uint64_t;
+	Param param[MAX_ETNAVIV_PARAMS] { };
+};
+
+#endif /* _INCLUDE__GPU_INFO_ETNAVIV_H_ */