Open source GPL/LGPL release

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);