gpu: nvgpu: unit: Add test unit module

Add a super simple tiny test unit module to test the unit test
framework.

This unit test has a test that deliberately fails so it obviously
cannot be part of a real unit test run. Eventually this will have
to be removed or otherwise skipped.

JIRA NVGPU-525

Change-Id: I41532a85156445a778897bbc84bb5919deab56ae
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1687095
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

userspace/Makefile.sources

@@ -45,4 +45,5 @@ CORE_HEADERS :=	\
 	$(CORE_SRC)/../include/unit/*.h
 
 # Each directory under the UNIT_SRC directory should correspond to one module.
-UNITS :=
+UNITS :=	\
+      $(UNIT_SRC)/test

userspace/units/Makefile.units

@@ -37,7 +37,7 @@ all: lib$(MODULE).so
 	$(CC) $(CFLAGS) -c -o $@ $<
 
 lib$(MODULE).so: $(OBJS)
-	$(CC) -shared -o $@ $(OBJS)
+	$(CC) -shared -o $@ $(OBJS) $(LIB_PATHS) -lnvgpu_unit
 	@mkdir -p $(UNIT_OUT)/
 	@cp $@ $(UNIT_OUT)/
 

userspace/units/test/Makefile

@@ -0,0 +1,31 @@
+# Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+#
+# 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.
+
+.SUFFIXES:
+
+#
+# Simple test unit test.
+#
+
+OBJS   = test.o
+MODULE = test
+
+# Defines all the rules for building a typical module.
+include ../Makefile.units

userspace/units/test/test.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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 <stdlib.h>
+
+#include <unit/unit.h>
+
+#include <nvgpu/posix/probe.h>
+
+int test_simplest(struct unit_module *m, struct gk20a *g, void *args)
+{
+	return UNIT_SUCCESS;
+}
+
+int test_fail(struct unit_module *m, struct gk20a *g, void *args)
+{
+	return UNIT_FAIL;
+}
+
+struct unit_module_test test_tests[] = {
+	UNIT_TEST(simplest, test_simplest, NULL),
+	UNIT_TEST(fail, test_fail, NULL),
+};
+
+UNIT_MODULE(test, test_tests, UNIT_PRIO_SELF_TEST);