/*
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* Copyright (C) 2015-2017 Netronome Systems, Inc.
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*
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* This software is dual licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree or the BSD 2-Clause License provided below. You have the
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* option to license this software under the complete terms of either license.
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*
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* The BSD 2-Clause License:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef NFP_CRC32_H
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#define NFP_CRC32_H
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#include <linux/kernel.h>
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#include <linux/crc32.h>
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/**
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* crc32_posix_end() - Finalize POSIX CRC32 working state
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* @crc: Current CRC32 working state
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* @total_len: Total length of data that was CRC32'd
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*
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* Return: Final POSIX CRC32 value
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*/
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static inline u32 crc32_posix_end(u32 crc, size_t total_len)
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{
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/* Extend with the length of the string. */
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while (total_len != 0) {
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u8 c = total_len & 0xff;
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crc = crc32_be(crc, &c, 1);
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total_len >>= 8;
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}
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return ~crc;
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}
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static inline u32 crc32_posix(const void *buff, size_t len)
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{
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return crc32_posix_end(crc32_be(0, buff, len), len);
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}
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#endif /* NFP_CRC32_H */
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