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annotate packages/fs/jffs2/current/src/compr.h @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 5bcbb50b501e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * JFFS2 -- Journalling Flash File System, Version 2.
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3 *
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4 * Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
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5 * University of Szeged, Hungary
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6 *
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7 * For licensing information, see the file 'LICENCE' in the
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8 * jffs2 directory.
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9 *
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10 * $Id: compr.h,v 1.8 2005/07/26 13:24:40 havasi Exp $
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11 *
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12 */
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13
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14 #ifndef __JFFS2_COMPR_H__
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15 #define __JFFS2_COMPR_H__
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16
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17 #include <linux/kernel.h>
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18 #include <linux/vmalloc.h>
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19 #include <linux/list.h>
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20 #include <linux/types.h>
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21 #include <linux/string.h>
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22 #include <linux/slab.h>
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23 #include <linux/errno.h>
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24 #include <linux/fs.h>
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25 #include <linux/jffs2.h>
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26 #include <linux/jffs2_fs_i.h>
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27 #include <linux/jffs2_fs_sb.h>
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28 #include "nodelist.h"
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29
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30 #define JFFS2_RUBINMIPS_PRIORITY 10
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31 #define JFFS2_DYNRUBIN_PRIORITY 20
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32 #define JFFS2_LZARI_PRIORITY 30
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33 #define JFFS2_LZO_PRIORITY 40
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34 #define JFFS2_RTIME_PRIORITY 50
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35 #define JFFS2_ZLIB_PRIORITY 60
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36
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37 #define JFFS2_RUBINMIPS_DISABLED /* RUBINs will be used only */
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38 #define JFFS2_DYNRUBIN_DISABLED /* for decompression */
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39
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40 #define JFFS2_COMPR_MODE_NONE 0
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41 #define JFFS2_COMPR_MODE_PRIORITY 1
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42 #define JFFS2_COMPR_MODE_SIZE 2
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43
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44 struct jffs2_compressor {
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45 struct list_head list;
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46 int priority; /* used by prirority comr. mode */
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47 char *name;
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48 char compr; /* JFFS2_COMPR_XXX */
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49 int (*compress)(unsigned char *data_in, unsigned char *cpage_out,
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50 uint32_t *srclen, uint32_t *destlen, void *model);
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51 int (*decompress)(unsigned char *cdata_in, unsigned char *data_out,
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52 uint32_t cdatalen, uint32_t datalen, void *model);
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53 int usecount;
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54 int disabled; /* if seted the compressor won't compress */
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55 unsigned char *compr_buf; /* used by size compr. mode */
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56 uint32_t compr_buf_size; /* used by size compr. mode */
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57 uint32_t stat_compr_orig_size;
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58 uint32_t stat_compr_new_size;
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59 uint32_t stat_compr_blocks;
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60 uint32_t stat_decompr_blocks;
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61 };
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62
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63 int jffs2_register_compressor(struct jffs2_compressor *comp);
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64 int jffs2_unregister_compressor(struct jffs2_compressor *comp);
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65
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66 int jffs2_compressors_init(void);
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67 int jffs2_compressors_exit(void);
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68
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69 uint16_t jffs2_compress(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
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70 unsigned char *data_in, unsigned char **cpage_out,
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71 uint32_t *datalen, uint32_t *cdatalen);
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72
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73 int jffs2_decompress(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
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74 uint16_t comprtype, unsigned char *cdata_in,
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75 unsigned char *data_out, uint32_t cdatalen, uint32_t datalen);
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76
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77 void jffs2_free_comprbuf(unsigned char *comprbuf, unsigned char *orig);
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78
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79 #ifdef CONFIG_JFFS2_PROC
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80 int jffs2_enable_compressor_name(const char *name);
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81 int jffs2_disable_compressor_name(const char *name);
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82 int jffs2_set_compression_mode_name(const char *mode_name);
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83 char *jffs2_get_compression_mode_name(void);
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84 int jffs2_set_compressor_priority(const char *mode_name, int priority);
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85 char *jffs2_list_compressors(void);
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86 char *jffs2_stats(void);
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87 #endif
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88
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89 /* Compressor modules */
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90 /* These functions will be called by jffs2_compressors_init/exit */
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91
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92 #ifdef CONFIG_JFFS2_RUBIN
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93 int jffs2_rubinmips_init(void);
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94 void jffs2_rubinmips_exit(void);
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95 int jffs2_dynrubin_init(void);
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96 void jffs2_dynrubin_exit(void);
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97 #endif
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98 #ifdef CONFIG_JFFS2_RTIME
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99 int jffs2_rtime_init(void);
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100 void jffs2_rtime_exit(void);
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101 #endif
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102 #ifdef CONFIG_JFFS2_ZLIB
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103 int jffs2_zlib_init(void);
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104 void jffs2_zlib_exit(void);
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105 #endif
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106
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107 #endif /* __JFFS2_COMPR_H__ */