[PATCH libdrm] tests: Add drm_set_cgrp_param

[Matt Roper <matthew.d.roper@intel.com>]

drm_set_cgrp_param is a simple tool to set DRM parameters associated with a
cgroup.  It is intended to be called at system initialization time (e.g., from
a sysv-init script or systemd service) to configure graphics policy and
resource management according to the wishes of the system integrator.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
---
 configure.ac                                  |  1 +
 tests/Makefile.am                             |  2 +-
 tests/drm_set_cgrp_param/Makefile.am          | 18 ++++++
 tests/drm_set_cgrp_param/drm_set_cgrp_param.c | 80 +++++++++++++++++++++++++++
 4 files changed, 100 insertions(+), 1 deletion(-)
 create mode 100644 tests/drm_set_cgrp_param/Makefile.am
 create mode 100644 tests/drm_set_cgrp_param/drm_set_cgrp_param.c

diff --git a/configure.ac b/configure.ac
index 35378b3384..9b5f340e2a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -567,6 +567,7 @@ AC_CONFIG_FILES([
 	tests/nouveau/Makefile
 	tests/etnaviv/Makefile
 	tests/util/Makefile
+	tests/drm_set_cgrp_param/Makefile
 	man/Makefile
 	libdrm.pc])
 AC_OUTPUT
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 0355a9255f..d77a8639c8 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,4 +1,4 @@
-SUBDIRS = util kms modeprint proptest modetest vbltest
+SUBDIRS = util kms modeprint proptest modetest vbltest drm_set_cgrp_param
 
 if HAVE_LIBKMS
 SUBDIRS += kmstest
diff --git a/tests/drm_set_cgrp_param/Makefile.am b/tests/drm_set_cgrp_param/Makefile.am
new file mode 100644
index 0000000000..c32ec1c440
--- /dev/null
+++ b/tests/drm_set_cgrp_param/Makefile.am
@@ -0,0 +1,18 @@
+AM_CFLAGS = \
+	$(WARN_CFLAGS)\
+	-I$(top_srcdir)/include/drm \
+	-I$(top_srcdir)/tests \
+	-I$(top_srcdir)
+
+if HAVE_INSTALL_TESTS
+bin_PROGRAMS = \
+	drm_set_cgrp_param
+else
+noinst_PROGRAMS = \
+	drm_set_cgrp_param
+endif
+
+drm_set_cgrp_param_SOURCES = \
+	drm_set_cgrp_param.c
+drm_set_cgrp_param_LDADD = \
+	$(top_builddir)/libdrm.la
diff --git a/tests/drm_set_cgrp_param/drm_set_cgrp_param.c b/tests/drm_set_cgrp_param/drm_set_cgrp_param.c
new file mode 100644
index 0000000000..987bd18e88
--- /dev/null
+++ b/tests/drm_set_cgrp_param/drm_set_cgrp_param.c
@@ -0,0 +1,80 @@
+/*
+ * \file drm_set_cgrp_prop.c
+ * Simple tool to set a DRM property for a cgroup.  Intended for use in
+ * system-specific initialization handling (e.g., sysv init, systemd, etc.).
+ */
+
+/*
+ * Copyright © 2018 Intel Corporation
+ *
+ * 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
+ * AUTHORS OR COPYRIGHT HOLDERS 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 <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "xf86drm.h"
+#include "xf86drmMode.h"
+
+#include "util/common.h"
+
+int main(int argc, char **argv)
+{
+	int drm_fd, cgrp_fd;
+	struct drm_cgroup_setparam req;
+	int ret;
+
+	if (argc != 5) {
+		puts("Usage:");
+		printf("  %s <drm device> <cgroup-v2> <prop> <val>\n\n", argv[0]);
+		puts("Example:");
+		printf("  %s /dev/dri/card0 /sys/fs/cgroup-2/highprio 1 10\n",
+		       argv[0]);
+		return 1;
+	}
+
+	drm_fd = open(argv[1], O_RDWR, 0);
+	if (drm_fd < 0) {
+		perror("Invalid DRM device");
+		return 1;
+	}
+
+	cgrp_fd = open(argv[2], O_RDONLY|O_DIRECTORY, 0);
+	if (cgrp_fd < 0) {
+		perror("Invalid cgroup directory");
+		return 1;
+	}
+
+	req.cgroup_fd = cgrp_fd;
+	req.reserved = 0;
+	req.param = (uint64_t)strtoul(argv[3], NULL, 0);
+	req.value = (int64_t)strtol(argv[4], NULL, 0);
+
+	ret = drmIoctl(drm_fd, DRM_IOCTL_CGROUP_SETPARAM, &req);
+	if (ret)
+		perror("Failed to set cgroup parameter");
+
+	close(cgrp_fd);
+	close(drm_fd);
+
+	return ret;
+}
-- 
2.14.3

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