| /* 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 */ |
