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Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/include/linux/bch.h

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/* SPDX-License-Identifier: GPL-2.0-only / / * Generic binary BCH encoding/decoding library * * Copyright © 2011 Parrot S.A. * * Author: Ivan Djelic <ivan.djelic@parrot.com> * * Description: * * This library provides runtime configurable encoding/decoding of binary * Bose-Chaudhuri-Hocquenghem (BCH) codes. / #ifndef _BCH_H #define _BCH_H #include <linux/types.h> /* * struct bch_control - BCH control structure * @m: Galois field order * @n: maximum codeword size in bits (= 2^m-1) * @t: error correction capability in bits * @ecc_bits: ecc exact size in bits, i.e. generator polynomial degree (<=mt) @ecc_bytes: ecc max size (mt bits) in bytes @a_pow_tab: Galois field GF(2^m) exponentiation lookup table * @a_log_tab: Galois field GF(2^m) log lookup table * @mod8_tab: remainder generator polynomial lookup tables * @ecc_buf: ecc parity words buffer * @ecc_buf2: ecc parity words buffer * @xi_tab: GF(2^m) base for solving degree 2 polynomial roots * @syn: syndrome buffer * @cache: log-based polynomial representation buffer * @elp: error locator polynomial * @poly_2t: temporary polynomials of degree 2t / struct bch_control { unsigned int m; unsigned int n; unsigned int t; unsigned int ecc_bits; unsigned int ecc_bytes; / private: / uint16_t a_pow_tab; uint16_t a_log_tab; uint32_t mod8_tab; uint32_t ecc_buf; uint32_t ecc_buf2; unsigned int xi_tab; unsigned int syn; int cache; struct gf_poly elp; struct gf_poly poly_2t[4]; }; struct bch_control init_bch(int m, int t, unsigned int prim_poly); void free_bch(struct bch_control bch); void encode_bch(struct bch_control bch, const uint8_t data, unsigned int len, uint8_t ecc); int decode_bch(struct bch_control bch, const uint8_t data, unsigned int len, const uint8_t recv_ecc, const uint8_t calc_ecc, const unsigned int syn, unsigned int errloc); #endif /* _BCH_H */

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