test: add CRC computation

This patch provides a set of tests for verifying the functional
correctness of 16-bit and 32-bit CRC APIs.

Signed-off-by: Jasvinder Singh <jasvinder.singh@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>

MAINTAINERS

@@ -531,6 +531,7 @@ Packet CRC
 M: Jasvinder Singh <jasvinder.singh@intel.com>
 F: lib/librte_net/rte_net_crc*
 F: lib/librte_net/net_crc_sse.h
+F: test/test/test_crc.c
 
 IP fragmentation & reassembly
 M: Konstantin Ananyev <konstantin.ananyev@intel.com>

test/test/Makefile

@@ -162,6 +162,8 @@ SRCS-$(CONFIG_RTE_LIBRTE_CMDLINE) += test_cmdline_cirbuf.c
 SRCS-$(CONFIG_RTE_LIBRTE_CMDLINE) += test_cmdline_string.c
 SRCS-$(CONFIG_RTE_LIBRTE_CMDLINE) += test_cmdline_lib.c
 
+SRCS-$(CONFIG_RTE_LIBRTE_NET) += test_crc.c
+
 ifeq ($(CONFIG_RTE_LIBRTE_SCHED),y)
 SRCS-y += test_red.c
 SRCS-y += test_sched.c

test/test/test_crc.c

@@ -0,0 +1,184 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation.
+ *   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 Intel Corporation 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.
+ */
+
+#include "test.h"
+
+#include <rte_hexdump.h>
+#include <rte_malloc.h>
+#include <rte_memcpy.h>
+#include <rte_net_crc.h>
+
+#define CRC_VEC_LEN        32
+#define CRC32_VEC_LEN1     1512
+#define CRC32_VEC_LEN2     348
+#define CRC16_VEC_LEN1     12
+#define CRC16_VEC_LEN2     2
+#define LINE_LEN           75
+
+/* CRC test vector */
+static const uint8_t crc_vec[CRC_VEC_LEN] = {
+	'0', '1', '2', '3', '4', '5', '6', '7',
+	'8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
+	'g', 'h', 'i', 'j', 'A', 'B', 'C', 'D',
+	'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
+};
+
+/* 32-bit CRC test vector */
+static const uint8_t crc32_vec1[12] = {
+	0xBE, 0xD7, 0x23, 0x47, 0x6B, 0x8F,
+	0xB3, 0x14, 0x5E, 0xFB, 0x35, 0x59,
+};
+
+/* 16-bit CRC test vector 1 */
+static const uint8_t crc16_vec1[CRC16_VEC_LEN1] = {
+	0x0D, 0x01, 0x01, 0x23, 0x45, 0x67,
+	0x89, 0x01, 0x23, 0x45, 0x00, 0x01,
+};
+
+/* 16-bit CRC test vector 2 */
+static const uint8_t crc16_vec2[CRC16_VEC_LEN2] = {
+	0x03, 0x3f,
+};
+/** CRC results */
+static const uint32_t crc32_vec_res = 0xb491aab4;
+static const uint32_t crc32_vec1_res = 0xac54d294;
+static const uint32_t crc32_vec2_res = 0xefaae02f;
+static const uint32_t crc16_vec_res = 0x6bec;
+static const uint16_t crc16_vec1_res = 0x8cdd;
+static const uint16_t crc16_vec2_res = 0xec5b;
+
+static int
+crc_calc(const uint8_t *vec,
+	uint32_t vec_len,
+	enum rte_net_crc_type type)
+{
+	/* compute CRC */
+	uint32_t ret = rte_net_crc_calc(vec, vec_len, type);
+
+	/* dump data on console */
+	TEST_HEXDUMP(stdout, NULL, vec, vec_len);
+
+	return  ret;
+}
+
+static int
+test_crc_calc(void)
+{
+	uint32_t i;
+	enum rte_net_crc_type type;
+	uint8_t *test_data;
+	uint32_t result;
+	int error;
+
+	/* 32-bit ethernet CRC: Test 1 */
+	type = RTE_NET_CRC32_ETH;
+
+	result = crc_calc(crc_vec, CRC_VEC_LEN, type);
+	if (result != crc32_vec_res)
+		return -1;
+
+	/* 32-bit ethernet CRC: Test 2 */
+	test_data = rte_zmalloc(NULL, CRC32_VEC_LEN1, 0);
+
+	for (i = 0; i < CRC32_VEC_LEN1; i += 12)
+		rte_memcpy(&test_data[i], crc32_vec1, 12);
+
+	result = crc_calc(test_data, CRC32_VEC_LEN1, type);
+	if (result != crc32_vec1_res) {
+		error = -2;
+		goto fail;
+	}
+
+	/* 32-bit ethernet CRC: Test 3 */
+	for (i = 0; i < CRC32_VEC_LEN2; i += 12)
+		rte_memcpy(&test_data[i], crc32_vec1, 12);
+
+	result = crc_calc(test_data, CRC32_VEC_LEN2, type);
+	if (result != crc32_vec2_res) {
+		error = -3;
+		goto fail;
+	}
+
+	/* 16-bit CCITT CRC:  Test 4 */
+	type = RTE_NET_CRC16_CCITT;
+	result = crc_calc(crc_vec, CRC_VEC_LEN, type);
+	if (result != crc16_vec_res) {
+		error = -4;
+		goto fail;
+	}
+	/* 16-bit CCITT CRC:  Test 5 */
+	result = crc_calc(crc16_vec1, CRC16_VEC_LEN1, type);
+	if (result != crc16_vec1_res) {
+		error = -5;
+		goto fail;
+	}
+	/* 16-bit CCITT CRC:  Test 6 */
+	result = crc_calc(crc16_vec2, CRC16_VEC_LEN2, type);
+	if (result != crc16_vec2_res) {
+		error = -6;
+		goto fail;
+	}
+
+	rte_free(test_data);
+	return 0;
+
+fail:
+	rte_free(test_data);
+	return error;
+}
+
+static int
+test_crc(void)
+{
+	int ret;
+	/* set CRC scalar mode */
+	rte_net_crc_set_alg(RTE_NET_CRC_SCALAR);
+
+	ret = test_crc_calc();
+	if (ret < 0) {
+		printf("test_crc (scalar): failed (%d)\n", ret);
+		return ret;
+	}
+	/* set CRC sse4.2 mode */
+	rte_net_crc_set_alg(RTE_NET_CRC_SSE42);
+
+	ret = test_crc_calc();
+	if (ret < 0) {
+		printf("test_crc (x86_64_SSE4.2): failed (%d)\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+REGISTER_TEST_COMMAND(crc_autotest, test_crc);