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/*
* Copyright (C) 2015-2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#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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