name : nand-ecc-sw-bch.h /* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com> * * This file is the header for the NAND BCH ECC implementation. */ #ifndef __MTD_NAND_ECC_SW_BCH_H__ #define __MTD_NAND_ECC_SW_BCH_H__ #include <linux/mtd/nand.h> #include <linux/bch.h> /** * struct nand_ecc_sw_bch_conf - private software BCH ECC engine structure * @req_ctx: Save request context and tweak the original request to fit the * engine needs * @code_size: Number of bytes needed to store a code (one code per step) * @calc_buf: Buffer to use when calculating ECC bytes * @code_buf: Buffer to use when reading (raw) ECC bytes from the chip * @bch: BCH control structure * @errloc: error location array * @eccmask: XOR ecc mask, allows erased pages to be decoded as valid */ struct nand_ecc_sw_bch_conf { struct nand_ecc_req_tweak_ctx req_ctx; unsigned int code_size; u8 *calc_buf; u8 *code_buf; struct bch_control *bch; unsigned int *errloc; unsigned char *eccmask; }; #if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_BCH) int nand_ecc_sw_bch_calculate(struct nand_device *nand, const unsigned char *buf, unsigned char *code); int nand_ecc_sw_bch_correct(struct nand_device *nand, unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc); int nand_ecc_sw_bch_init_ctx(struct nand_device *nand); void nand_ecc_sw_bch_cleanup_ctx(struct nand_device *nand); struct nand_ecc_engine *nand_ecc_sw_bch_get_engine(void); #else /* !CONFIG_MTD_NAND_ECC_SW_BCH */ static inline int nand_ecc_sw_bch_calculate(struct nand_device *nand, const unsigned char *buf, unsigned char *code) { return -ENOTSUPP; } static inline int nand_ecc_sw_bch_correct(struct nand_device *nand, unsigned char *buf, unsigned char *read_ecc, unsigned char *calc_ecc) { return -ENOTSUPP; } static inline int nand_ecc_sw_bch_init_ctx(struct nand_device *nand) { return -ENOTSUPP; } static inline void nand_ecc_sw_bch_cleanup_ctx(struct nand_device *nand) {} #endif /* CONFIG_MTD_NAND_ECC_SW_BCH */ #endif /* __MTD_NAND_ECC_SW_BCH_H__ */