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1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */2/* Copyright (C) 2015-2017 Netronome Systems, Inc. */3 4#ifndef NFP_CRC32_H5#define NFP_CRC32_H6 7#include <linux/crc32.h>8 9/**10 * crc32_posix_end() - Finalize POSIX CRC32 working state11 * @crc: Current CRC32 working state12 * @total_len: Total length of data that was CRC32'd13 *14 * Return: Final POSIX CRC32 value15 */16static inline u32 crc32_posix_end(u32 crc, size_t total_len)17{18 /* Extend with the length of the string. */19 while (total_len != 0) {20 u8 c = total_len & 0xff;21 22 crc = crc32_be(crc, &c, 1);23 total_len >>= 8;24 }25 26 return ~crc;27}28 29static inline u32 crc32_posix(const void *buff, size_t len)30{31 return crc32_posix_end(crc32_be(0, buff, len), len);32}33 34#endif /* NFP_CRC32_H */35