LXR linux/drivers/mtd/sm

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright © 2009 - Maxim Levitsky
   4 * SmartMedia/xD translation layer
   5 *
   6 * Based loosly on ssfdc.c which is
   7 *  © 2005 Eptar srl
   8 *  Author: Claudio Lanconelli <lanconelli.claudio@eptar.com>
   9 */
  10
  11#include <linux/mtd/blktrans.h>
  12#include <linux/kfifo.h>
  13#include <linux/sched.h>
  14#include <linux/completion.h>
  15#include <linux/mtd/mtd.h>
  16
  17
  18
  19struct ftl_zone {
  20        bool initialized;
  21        int16_t *lba_to_phys_table;             /* LBA to physical table */
  22        struct kfifo free_sectors;      /* queue of free sectors */
  23};
  24
  25struct sm_ftl {
  26        struct mtd_blktrans_dev *trans;
  27
  28        struct mutex mutex;             /* protects the structure */
  29        struct ftl_zone *zones;         /* FTL tables for each zone */
  30
  31        /* Media information */
  32        int block_size;                 /* block size in bytes */
  33        int zone_size;                  /* zone size in blocks */
  34        int zone_count;                 /* number of zones */
  35        int max_lba;                    /* maximum lba in a zone */
  36        int smallpagenand;              /* 256 bytes/page nand */
  37        bool readonly;                  /* is FS readonly */
  38        bool unstable;
  39        int cis_block;                  /* CIS block location */
  40        int cis_boffset;                /* CIS offset in the block */
  41        int cis_page_offset;            /* CIS offset in the page */
  42        void *cis_buffer;               /* tmp buffer for cis reads */
  43
  44        /* Cache */
  45        int cache_block;                /* block number of cached block */
  46        int cache_zone;                 /* zone of cached block */
  47        unsigned char *cache_data;      /* cached block data */
  48        long unsigned int cache_data_invalid_bitmap;
  49        bool cache_clean;
  50        struct work_struct flush_work;
  51        struct timer_list timer;
  52
  53        /* Geometry stuff */
  54        int heads;
  55        int sectors;
  56        int cylinders;
  57
  58        struct attribute_group *disk_attributes;
  59};
  60
  61struct chs_entry {
  62        unsigned long size;
  63        unsigned short cyl;
  64        unsigned char head;
  65        unsigned char sec;
  66};
  67
  68
  69#define SM_FTL_PARTN_BITS       3
  70
  71#define sm_printk(format, ...) \
  72        printk(KERN_WARNING "sm_ftl" ": " format "\n", ## __VA_ARGS__)
  73
  74#define dbg(format, ...) \
  75        if (debug) \
  76                printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
  77
  78#define dbg_verbose(format, ...) \
  79        if (debug > 1) \
  80                printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
  81
  82
  83static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block,
  84                                                                int put_free);
  85static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block);
  86
  87static int sm_recheck_media(struct sm_ftl *ftl);
  88