/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
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/* Copyright (C) 2015-2017 Netronome Systems, Inc. */
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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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