369991d997
Replace the BSD license header with the SPDX tag for files with only an Intel copyright on them. Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Intel Corporation
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*/
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#ifndef _RTE_NET_CRC_H_
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#define _RTE_NET_CRC_H_
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** CRC polynomials */
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#define CRC32_ETH_POLYNOMIAL 0x04c11db7UL
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#define CRC16_CCITT_POLYNOMIAL 0x1021U
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#define CRC_LUT_SIZE 256
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/** CRC types */
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enum rte_net_crc_type {
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RTE_NET_CRC16_CCITT = 0,
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RTE_NET_CRC32_ETH,
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RTE_NET_CRC_REQS
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};
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/** CRC compute algorithm */
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enum rte_net_crc_alg {
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RTE_NET_CRC_SCALAR = 0,
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RTE_NET_CRC_SSE42,
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RTE_NET_CRC_NEON,
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};
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/**
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* This API set the CRC computation algorithm (i.e. scalar version,
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* x86 64-bit sse4.2 intrinsic version, etc.) and internal data
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* structure.
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*
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* @param alg
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* This parameter is used to select the CRC implementation version.
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* - RTE_NET_CRC_SCALAR
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* - RTE_NET_CRC_SSE42 (Use 64-bit SSE4.2 intrinsic)
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* - RTE_NET_CRC_NEON (Use ARM Neon intrinsic)
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*/
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void
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rte_net_crc_set_alg(enum rte_net_crc_alg alg);
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/**
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* CRC compute API
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*
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* @param data
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* Pointer to the packet data for CRC computation
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* @param data_len
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* Data length for CRC computation
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* @param type
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* CRC type (enum rte_net_crc_type)
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*
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* @return
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* CRC value
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*/
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uint32_t
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rte_net_crc_calc(const void *data,
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uint32_t data_len,
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enum rte_net_crc_type type);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTE_NET_CRC_H_ */
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