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 19 struct 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 25 struct 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 61 struct 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 83 static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block, 84 int put_free); 85 static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block); 86 87 static int sm_recheck_media(struct sm_ftl *ftl); 88