Add gpuclockctl to allow privilaged control of GPU parameters

daemon/gpuclockctl.c

@@ -0,0 +1,76 @@
+/*
+
+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.
+
+ */
+
+#define _GNU_SOURCE
+
+#include "logging.h"
+
+#include "gpu-query.h"
+
+/**
+ * Main entry point, dispatch to the appropriate helper
+ */
+int main(int argc, char *argv[])
+{
+	if (argc == 4 && strncmp(argv[1], "get", 3) == 0) {
+		const char *vendor = argv[1];
+		const char *device = argv[2];
+
+		struct GameModeGPUInfo info;
+		/* TODO Populate with vendor and device */
+
+		get_gpu_state(&info);
+
+		printf("%d %d\n", info.core, info.mem);
+
+	} else if (argc == 6 && strncmp(argv[3], "set", 3) == 0) {
+		const char *vendor = argv[1];
+		const char *device = argv[2];
+		const char *core = argv[4];
+		const char *mem = argv[5];
+
+		/* Must be root to set the state */
+		if (geteuid() != 0) {
+			fprintf(stderr, "This program must be run as root\n");
+			return EXIT_FAILURE;
+		}
+
+		struct GameModeGPUInfo info;
+		/* TODO Populate with vendor, device and clocks */
+
+		return set_gpu_state(&info);
+	} else {
+		fprintf(stderr, "usage: gpuclockctl PCI_ID DEVICE [get] [set CORE MEM]\n");
+		return EXIT_FAILURE;
+	}
+
+	return EXIT_SUCCESS;
+}