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 | |