gpu: nvgpu: add tests for circ_buf

Add unit tests for posix circ_buf unit.

Jira NVGPU-4417

Change-Id: Ic0b04961cdd7813aed6f9b16fd0724b0e3cfeb2a
Signed-off-by: ajesh <akv@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2287141
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

userspace/Makefile.sources

@@ -57,6 +57,7 @@ UNITS :=				\
 	$(UNIT_SRC)/posix/rwsem		\
 	$(UNIT_SRC)/posix/queue		\
 	$(UNIT_SRC)/posix/utils		\
+	$(UNIT_SRC)/posix/circ_buf	\
 	$(UNIT_SRC)/bus			\
 	$(UNIT_SRC)/pramin		\
 	$(UNIT_SRC)/ptimer		\

userspace/SWUTS.h

@@ -119,6 +119,7 @@
  *   - @ref SWUTS-posix-ossched
  *   - @ref SWUTS-posix-rwsem
  *   - @ref SWUTS-posix-utils
+ *   - @ref SWUTS-posix-circbuf
  *   - @ref SWUTS-priv_ring
  *   - @ref SWUTS-ptimer
  *   - @ref SWUTS-sdl

userspace/SWUTS.sources

@@ -97,6 +97,7 @@ INPUT += ../../../userspace/units/posix/timers/posix-timers.h
 INPUT += ../../../userspace/units/posix/os_sched/posix-ossched.h
 INPUT += ../../../userspace/units/posix/rwsem/posix-rwsem.h
 INPUT += ../../../userspace/units/posix/utils/posix-utils.h
+INPUT += ../../../userspace/units/posix/circ_buf/posix-circbuf.h
 INPUT += ../../../userspace/units/priv_ring/nvgpu-priv_ring.h
 INPUT += ../../../userspace/units/ptimer/nvgpu-ptimer.h
 INPUT += ../../../userspace/units/therm/nvgpu-therm.h

userspace/required_tests.json

@@ -4142,6 +4142,18 @@
         "unit": "posix_bug",
         "test_level": 0
     },
+    {
+        "test": "test_circbufcnt",
+        "case": "circbufcnt",
+        "unit": "posix_circbuf",
+        "test_level": 0
+    },
+    {
+        "test": "test_circbufspace",
+        "case": "circbufspace",
+        "unit": "posix_circbuf",
+        "test_level": 0
+    },
     {
         "test": "test_cond_init_destroy",
         "case": "init",

userspace/units/posix/circ_buf/Makefile

@@ -0,0 +1,26 @@
+# Copyright (c) 2020, 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:
+
+OBJS   = posix-circbuf.o
+MODULE = posix-circbuf
+
+include ../../Makefile.units

userspace/units/posix/circ_buf/Makefile.interface.tmk

@@ -0,0 +1,35 @@
+################################### tell Emacs this is a -*- makefile-gmake -*-
+#
+# Copyright (c) 2020, 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.
+#
+# tmake for SW Mobile component makefile
+#
+###############################################################################
+
+NVGPU_UNIT_NAME=posix-circbuf
+
+include $(NV_COMPONENT_DIR)/../../Makefile.units.common.interface.tmk
+
+# Local Variables:
+# indent-tabs-mode: t
+# tab-width: 8
+# End:
+# vi: set tabstop=8 noexpandtab:

userspace/units/posix/circ_buf/Makefile.tmk

@@ -0,0 +1,35 @@
+################################### tell Emacs this is a -*- makefile-gmake -*-
+#
+# Copyright (c) 2020, 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.
+#
+# tmake for SW Mobile component makefile
+#
+###############################################################################
+
+NVGPU_UNIT_NAME=posix-circbuf
+
+include $(NV_COMPONENT_DIR)/../../Makefile.units.common.tmk
+
+# Local Variables:
+# indent-tabs-mode: t
+# tab-width: 8
+# End:
+# vi: set tabstop=8 noexpandtab:

userspace/units/posix/circ_buf/posix-circbuf.c

@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2020, 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 <stdint.h>
+
+#include <unit/io.h>
+#include <unit/unit.h>
+
+#include <nvgpu/circ_buf.h>
+
+#include "posix-circbuf.h"
+
+#define BUFFER_SIZE	16UL
+
+int test_circbufcnt(struct unit_module *m,
+			struct gk20a *g, void *args)
+{
+	unsigned int i;
+	unsigned long head, tail, size, ret;
+
+	head = 0;
+	tail = 0;
+	size = BUFFER_SIZE;
+	for (i = 0; i < BUFFER_SIZE; i++) {
+		head = i;
+		ret = CIRC_CNT(head, tail, size);
+		if (ret != i) {
+			unit_return_fail(m, "CIRC_CNT failed %ld\n", ret);
+		}
+	}
+
+	head = BUFFER_SIZE - 1;
+	for (i = 0; i < BUFFER_SIZE; i++) {
+		tail = (BUFFER_SIZE - 1) - i;
+		ret = CIRC_CNT(head, tail, size);
+		if (ret != i) {
+			unit_return_fail(m, "CIRC_CNT failed %ld\n", ret);
+		}
+	}
+
+	head = BUFFER_SIZE/2;
+	tail = BUFFER_SIZE/2;
+	ret = CIRC_CNT(head, tail, size);
+	if (ret) {
+		unit_return_fail(m, "CIRC_CNT failed %ld\n", ret);
+	}
+
+	return UNIT_SUCCESS;
+}
+
+int test_circbufspace(struct unit_module *m,
+			struct gk20a *g, void *args)
+{
+	unsigned int i;
+	unsigned long head, tail, size, ret;
+
+	tail = BUFFER_SIZE;
+	size = BUFFER_SIZE;
+	for (i = 0; i < BUFFER_SIZE; i++) {
+		head = i;
+		ret = CIRC_SPACE(head, tail, size);
+		if (ret != ((BUFFER_SIZE - 1) - i)) {
+			unit_return_fail(m, "CIRC_SPACE failed %ld\n", ret);
+		}
+	}
+
+	return UNIT_SUCCESS;
+}
+
+struct unit_module_test posix_circbuf_tests[] = {
+	UNIT_TEST(circbufcnt, test_circbufcnt, NULL, 0),
+	UNIT_TEST(circbufspace, test_circbufspace, NULL, 0),
+};
+
+UNIT_MODULE(posix_circbuf, posix_circbuf_tests, UNIT_PRIO_POSIX_TEST);

userspace/units/posix/circ_buf/posix-circbuf.h

@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2020, 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.
+ */
+
+/**
+ * @addtogroup SWUTS-posix-circbuf
+ * @{
+ *
+ * Software Unit Test Specification for posix-circbuf
+ */
+
+#ifndef UNIT_POSIX_CIRCBUF_H
+#define UNIT_POSIX_CIRCBUF_H
+
+/**
+ * Test specification for test_circbufcnt
+ *
+ * Description: Test the buffer count implementation.
+ *
+ * Test Type: Feature
+ *
+ * Targets: CIRC_CNT
+ *
+ * Inputs: None
+ *
+ * Steps:
+ * 1) Invoke CIRC_CNT in loop with head assigned with loop index value and
+ *    tail as zero.
+ * 2) Check if the return value of buffer count is equal to loop index. Else
+ *    return fail.
+ * 3) Invoke CIRC_CNT in loop with head assigned as maximum index and tail
+ *    decreased according to the loop index value.
+ * 4) Check if the return value of buffer count is equal to loop index. Else
+ *    return fail.
+ * 5) Invoke CIRC_CNT with both head and tail assigned with same value.
+ * 6) Check if the return value is equal to zero, else return fail.
+ * 7) Return PASS.
+ *
+ * Output:
+ * The test returns PASS if all the invocations of CIRC_CNT returns the
+ * expected value as buffer count. Otherwise, test returns FAIL.
+ */
+int test_circbufcnt(struct unit_module *m, struct gk20a *g, void *args);
+
+/**
+ * Test specification for test_circbufspace
+ *
+ * Description: Test the buffer space check implementation.
+ *
+ * Test Type: Feature
+ *
+ * Targets: CIRC_SPACE
+ *
+ * Inputs: None
+ *
+ * Steps:
+ * 1) Invoke CIRC_SPACE in loop with head assigned as loop index and
+ *    tail as buffer size.
+ * 2) Check if the return value of buffer space is equal to the maximum
+ *    entries that the buffer can hold minus loop index. Else
+ *    return fail.
+ * 3) Return PASS.
+ *
+ * Output:
+ * The test returns PASS if all the invocations of CIRC_SPACE returns the
+ * expected value as available buffer space. Otherwise, test returns FAIL.
+ */
+int test_circbufspace(struct unit_module *m, struct gk20a *g, void *args);
+
+#endif /* UNIT_POSIX_CIRCBUF_H */