a566400e8b
Added CRC compute APIs for arm64 utilizing the pmull capability. Added new file net_crc_neon.h to hold the arm64 pmull CRC implementation. Added wrappers in rte_vect.h for those neon intrinsics which are not supported in GCC version < 7. Verified the changes with crc_autotest unit test case Signed-off-by: Ashwin Sekhar T K <ashwin.sekhar@caviumnetworks.com> Acked-by: Jianbo Liu <jianbo.liu@linaro.org>
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2017 Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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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