cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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nand-ecc-sw-bch.h (2117B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com>
      4 *
      5 * This file is the header for the NAND BCH ECC implementation.
      6 */
      7
      8#ifndef __MTD_NAND_ECC_SW_BCH_H__
      9#define __MTD_NAND_ECC_SW_BCH_H__
     10
     11#include <linux/mtd/nand.h>
     12#include <linux/bch.h>
     13
     14/**
     15 * struct nand_ecc_sw_bch_conf - private software BCH ECC engine structure
     16 * @req_ctx: Save request context and tweak the original request to fit the
     17 *           engine needs
     18 * @code_size: Number of bytes needed to store a code (one code per step)
     19 * @calc_buf: Buffer to use when calculating ECC bytes
     20 * @code_buf: Buffer to use when reading (raw) ECC bytes from the chip
     21 * @bch: BCH control structure
     22 * @errloc: error location array
     23 * @eccmask: XOR ecc mask, allows erased pages to be decoded as valid
     24 */
     25struct nand_ecc_sw_bch_conf {
     26	struct nand_ecc_req_tweak_ctx req_ctx;
     27	unsigned int code_size;
     28	u8 *calc_buf;
     29	u8 *code_buf;
     30	struct bch_control *bch;
     31	unsigned int *errloc;
     32	unsigned char *eccmask;
     33};
     34
     35#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_BCH)
     36
     37int nand_ecc_sw_bch_calculate(struct nand_device *nand,
     38			      const unsigned char *buf, unsigned char *code);
     39int nand_ecc_sw_bch_correct(struct nand_device *nand, unsigned char *buf,
     40			    unsigned char *read_ecc, unsigned char *calc_ecc);
     41int nand_ecc_sw_bch_init_ctx(struct nand_device *nand);
     42void nand_ecc_sw_bch_cleanup_ctx(struct nand_device *nand);
     43struct nand_ecc_engine *nand_ecc_sw_bch_get_engine(void);
     44
     45#else /* !CONFIG_MTD_NAND_ECC_SW_BCH */
     46
     47static inline int nand_ecc_sw_bch_calculate(struct nand_device *nand,
     48					    const unsigned char *buf,
     49					    unsigned char *code)
     50{
     51	return -ENOTSUPP;
     52}
     53
     54static inline int nand_ecc_sw_bch_correct(struct nand_device *nand,
     55					  unsigned char *buf,
     56					  unsigned char *read_ecc,
     57					  unsigned char *calc_ecc)
     58{
     59	return -ENOTSUPP;
     60}
     61
     62static inline int nand_ecc_sw_bch_init_ctx(struct nand_device *nand)
     63{
     64	return -ENOTSUPP;
     65}
     66
     67static inline void nand_ecc_sw_bch_cleanup_ctx(struct nand_device *nand) {}
     68
     69#endif /* CONFIG_MTD_NAND_ECC_SW_BCH */
     70
     71#endif /* __MTD_NAND_ECC_SW_BCH_H__ */