tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright © 2009 - Maxim Levitsky
3 * SmartMedia/xD translation layer
4 *
5 * Based loosly on ssfdc.c which is
6 * © 2005 Eptar srl
7 * Author: Claudio Lanconelli <lanconelli.claudio@eptar.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/mtd/blktrans.h>
15#include <linux/kfifo.h>
16#include <linux/sched.h>
17#include <linux/completion.h>
18#include <linux/mtd/mtd.h>
19
20
21
22struct ftl_zone {
23 bool initialized;
24 int16_t *lba_to_phys_table; /* LBA to physical table */
25 struct kfifo free_sectors; /* queue of free sectors */
26};
27
28struct sm_ftl {
29 struct mtd_blktrans_dev *trans;
30
31 struct mutex mutex; /* protects the structure */
32 struct ftl_zone *zones; /* FTL tables for each zone */
33
34 /* Media information */
35 int block_size; /* block size in bytes */
36 int zone_size; /* zone size in blocks */
37 int zone_count; /* number of zones */
38 int max_lba; /* maximum lba in a zone */
39 int smallpagenand; /* 256 bytes/page nand */
40 bool readonly; /* is FS readonly */
41 bool unstable;
42 int cis_block; /* CIS block location */
43 int cis_boffset; /* CIS offset in the block */
44 int cis_page_offset; /* CIS offset in the page */
45 void *cis_buffer; /* tmp buffer for cis reads */
46
47 /* Cache */
48 int cache_block; /* block number of cached block */
49 int cache_zone; /* zone of cached block */
50 unsigned char *cache_data; /* cached block data */
51 long unsigned int cache_data_invalid_bitmap;
52 bool cache_clean;
53 struct work_struct flush_work;
54 struct timer_list timer;
55
56 /* Geometry stuff */
57 int heads;
58 int sectors;
59 int cylinders;
60
61 struct attribute_group *disk_attributes;
62};
63
64struct chs_entry {
65 unsigned long size;
66 unsigned short cyl;
67 unsigned char head;
68 unsigned char sec;
69};
70
71
72#define SM_FTL_PARTN_BITS 3
73
74#define sm_printk(format, ...) \
75 printk(KERN_WARNING "sm_ftl" ": " format "\n", ## __VA_ARGS__)
76
77#define dbg(format, ...) \
78 if (debug) \
79 printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
80
81#define dbg_verbose(format, ...) \
82 if (debug > 1) \
83 printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
84
85
86static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block,
87 int put_free);
88static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block);
89
90static int sm_recheck_media(struct sm_ftl *ftl);