LXR linux/include/linux/mtd/nftl.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>
   4 */
   5
   6#ifndef __MTD_NFTL_H__
   7#define __MTD_NFTL_H__
   8
   9#include <linux/mtd/mtd.h>
  10#include <linux/mtd/blktrans.h>
  11
  12#include <mtd/nftl-user.h>
  13
  14/* these info are used in ReplUnitTable */
  15#define BLOCK_NIL          0xffff /* last block of a chain */
  16#define BLOCK_FREE         0xfffe /* free block */
  17#define BLOCK_NOTEXPLORED  0xfffd /* non explored block, only used during mounting */
  18#define BLOCK_RESERVED     0xfffc /* bios block or bad block */
  19
  20struct NFTLrecord {
  21        struct mtd_blktrans_dev mbd;
  22        __u16 MediaUnit, SpareMediaUnit;
  23        __u32 EraseSize;
  24        struct NFTLMediaHeader MediaHdr;
  25        int usecount;
  26        unsigned char heads;
  27        unsigned char sectors;
  28        unsigned short cylinders;
  29        __u16 numvunits;
  30        __u16 lastEUN;                  /* should be suppressed */
  31        __u16 numfreeEUNs;
  32        __u16 LastFreeEUN;              /* To speed up finding a free EUN */
  33        int head,sect,cyl;
  34        __u16 *EUNtable;                /* [numvunits]: First EUN for each virtual unit  */
  35        __u16 *ReplUnitTable;           /* [numEUNs]: ReplUnitNumber for each */
  36        unsigned int nb_blocks;         /* number of physical blocks */
  37        unsigned int nb_boot_blocks;    /* number of blocks used by the bios */
  38        struct erase_info instr;
  39};
  40
  41int NFTL_mount(struct NFTLrecord *s);
  42int NFTL_formatblock(struct NFTLrecord *s, int block);
  43
  44int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len,
  45                  size_t *retlen, uint8_t *buf);
  46int nftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len,
  47                   size_t *retlen, uint8_t *buf);
  48
  49#ifndef NFTL_MAJOR
  50#define NFTL_MAJOR 93
  51#endif
  52
  53#define MAX_NFTLS 16
  54#define MAX_SECTORS_PER_UNIT 64
  55#define NFTL_PARTN_BITS 4
  56
  57#endif /* __MTD_NFTL_H__ */
  58