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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
/* Copyright (C) 2015-2017 Netronome Systems, Inc. */
#ifndef NFP_CRC32_H
#define NFP_CRC32_H
#include <linux/kernel.h>
#include <linux/crc32.h>
/**
* crc32_posix_end() - Finalize POSIX CRC32 working state
* @crc: Current CRC32 working state
* @total_len: Total length of data that was CRC32'd
*
* Return: Final POSIX CRC32 value
*/
static inline u32 crc32_posix_end(u32 crc, size_t total_len)
{
/* Extend with the length of the string. */
while (total_len != 0) {
u8 c = total_len & 0xff;
crc = crc32_be(crc, &c, 1);
total_len >>= 8;
}
return ~crc;
}
static inline u32 crc32_posix(const void *buff, size_t len)
{
return crc32_posix_end(crc32_be(0, buff, len), len);
}
#endif /* NFP_CRC32_H */
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