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/*-
* 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.
*/
#ifndef _RTE_NET_CRC_H_
#define _RTE_NET_CRC_H_
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/** CRC polynomials */
#define CRC32_ETH_POLYNOMIAL 0x04c11db7UL
#define CRC16_CCITT_POLYNOMIAL 0x1021U
#define CRC_LUT_SIZE 256
/** CRC types */
enum rte_net_crc_type {
RTE_NET_CRC16_CCITT = 0,
RTE_NET_CRC32_ETH,
RTE_NET_CRC_REQS
};
/** CRC compute algorithm */
enum rte_net_crc_alg {
RTE_NET_CRC_SCALAR = 0,
RTE_NET_CRC_SSE42,
RTE_NET_CRC_NEON,
};
/**
* This API set the CRC computation algorithm (i.e. scalar version,
* x86 64-bit sse4.2 intrinsic version, etc.) and internal data
* structure.
*
* @param alg
* This parameter is used to select the CRC implementation version.
* - RTE_NET_CRC_SCALAR
* - RTE_NET_CRC_SSE42 (Use 64-bit SSE4.2 intrinsic)
* - RTE_NET_CRC_NEON (Use ARM Neon intrinsic)
*/
void
rte_net_crc_set_alg(enum rte_net_crc_alg alg);
/**
* CRC compute API
*
* @param data
* Pointer to the packet data for CRC computation
* @param data_len
* Data length for CRC computation
* @param type
* CRC type (enum rte_net_crc_type)
*
* @return
* CRC value
*/
uint32_t
rte_net_crc_calc(const void *data,
uint32_t data_len,
enum rte_net_crc_type type);
#ifdef __cplusplus
}
#endif
#endif /* _RTE_NET_CRC_H_ */
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