Add gpuclockctl to allow privilaged control of GPU parameters

daemon/gpu-query.h

@@ -0,0 +1,61 @@
+/*
+
+Copyright (c) 2017-2018, Feral Interactive
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+ * Neither the name of Feral Interactive nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+ */
+
+#pragma once
+
+/* Enums for GPU vendors */
+enum GPUVendor {
+	Vendor_Invalid = 0,
+	Vendor_NVIDIA = 0x10de,
+	Vendor_AMD = 0x1002,
+	Vendor_Intel = 0x8086
+};
+
+/* Storage for GPU info*/
+struct GameModeGPUInfo {
+	enum GPUVendor vendor;
+	int device; /* path to device, ie. /sys/class/drm/card#/ */
+
+	long core; /* Core clock to apply */
+	long mem;  /* Mem clock to apply */
+};
+
+/**
+ * Get the gpu state
+ * Populates the struct with the GPU info on the system
+ */
+int get_gpu_state( struct GameModeGPUInfo* info );
+
+/**
+ * Set the gpu state based on input parameters
+ * Only works when run as root
+ */
+int set_gpu_state( struct GameModeGPUInfo* info );