cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

nand-ecc-sw-hamming.h (2717B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 *  Copyright (C) 2000-2010 Steven J. Hill <sjhill@realitydiluted.com>
      4 *			    David Woodhouse <dwmw2@infradead.org>
      5 *			    Thomas Gleixner <tglx@linutronix.de>
      6 *
      7 * This file is the header for the NAND Hamming ECC implementation.
      8 */
      9
     10#ifndef __MTD_NAND_ECC_SW_HAMMING_H__
     11#define __MTD_NAND_ECC_SW_HAMMING_H__
     12
     13#include <linux/mtd/nand.h>
     14
     15/**
     16 * struct nand_ecc_sw_hamming_conf - private software Hamming ECC engine structure
     17 * @req_ctx: Save request context and tweak the original request to fit the
     18 *           engine needs
     19 * @code_size: Number of bytes needed to store a code (one code per step)
     20 * @calc_buf: Buffer to use when calculating ECC bytes
     21 * @code_buf: Buffer to use when reading (raw) ECC bytes from the chip
     22 * @sm_order: Smart Media special ordering
     23 */
     24struct nand_ecc_sw_hamming_conf {
     25	struct nand_ecc_req_tweak_ctx req_ctx;
     26	unsigned int code_size;
     27	u8 *calc_buf;
     28	u8 *code_buf;
     29	unsigned int sm_order;
     30};
     31
     32#if IS_ENABLED(CONFIG_MTD_NAND_ECC_SW_HAMMING)
     33
     34int nand_ecc_sw_hamming_init_ctx(struct nand_device *nand);
     35void nand_ecc_sw_hamming_cleanup_ctx(struct nand_device *nand);
     36int ecc_sw_hamming_calculate(const unsigned char *buf, unsigned int step_size,
     37			     unsigned char *code, bool sm_order);
     38int nand_ecc_sw_hamming_calculate(struct nand_device *nand,
     39				  const unsigned char *buf,
     40				  unsigned char *code);
     41int ecc_sw_hamming_correct(unsigned char *buf, unsigned char *read_ecc,
     42			   unsigned char *calc_ecc, unsigned int step_size,
     43			   bool sm_order);
     44int nand_ecc_sw_hamming_correct(struct nand_device *nand, unsigned char *buf,
     45				unsigned char *read_ecc,
     46				unsigned char *calc_ecc);
     47
     48#else /* !CONFIG_MTD_NAND_ECC_SW_HAMMING */
     49
     50static inline int nand_ecc_sw_hamming_init_ctx(struct nand_device *nand)
     51{
     52	return -ENOTSUPP;
     53}
     54
     55static inline void nand_ecc_sw_hamming_cleanup_ctx(struct nand_device *nand) {}
     56
     57static inline int ecc_sw_hamming_calculate(const unsigned char *buf,
     58					   unsigned int step_size,
     59					   unsigned char *code, bool sm_order)
     60{
     61	return -ENOTSUPP;
     62}
     63
     64static inline int nand_ecc_sw_hamming_calculate(struct nand_device *nand,
     65						const unsigned char *buf,
     66						unsigned char *code)
     67{
     68	return -ENOTSUPP;
     69}
     70
     71static inline int ecc_sw_hamming_correct(unsigned char *buf,
     72					 unsigned char *read_ecc,
     73					 unsigned char *calc_ecc,
     74					 unsigned int step_size, bool sm_order)
     75{
     76	return -ENOTSUPP;
     77}
     78
     79static inline int nand_ecc_sw_hamming_correct(struct nand_device *nand,
     80					      unsigned char *buf,
     81					      unsigned char *read_ecc,
     82					      unsigned char *calc_ecc)
     83{
     84	return -ENOTSUPP;
     85}
     86
     87#endif /* CONFIG_MTD_NAND_ECC_SW_HAMMING */
     88
     89#endif /* __MTD_NAND_ECC_SW_HAMMING_H__ */