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annotate packages/fs/yaffs/current/src/yaffs_mtdif2.c @ 425:dea4d7d250ad ecos

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Move sources into packages/fs/yaffs/current/src/
author Ross Younger <wry@ecoscentric.com>
date Fri, 14 May 2010 16:03:09 +0100
parents yaffs_mtdif2.c@d94b1449bddc
children
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1 /*
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2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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3 *
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4 * Copyright (C) 2002-2010 Aleph One Ltd.
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5 * for Toby Churchill Ltd and Brightstar Engineering
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6 *
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7 * Created by Charles Manning <charles@aleph1.co.uk>
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8 *
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9 * This program is free software; you can redistribute it and/or modify
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10 * it under the terms of the GNU General Public License version 2 as
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11 * published by the Free Software Foundation.
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12 */
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13
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14 /* mtd interface for YAFFS2 */
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16 #include "yportenv.h"
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17 #include "yaffs_trace.h"
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19 #include "yaffs_mtdif2.h"
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20
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21 #include "linux/mtd/mtd.h"
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22 #include "linux/types.h"
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23 #include "linux/time.h"
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24
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25 #include "yaffs_packedtags2.h"
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26
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27 #include "yaffs_linux.h"
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28
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29 /* NB For use with inband tags....
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30 * We assume that the data buffer is of size totalBytersPerChunk so that we can also
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31 * use it to load the tags.
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32 */
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33 int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
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34 const __u8 *data,
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35 const yaffs_ExtendedTags *tags)
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36 {
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37 struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd;
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38 #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
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39 struct mtd_oob_ops ops;
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40 #else
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41 size_t dummy;
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42 #endif
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43 int retval = 0;
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45 loff_t addr;
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46
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47 yaffs_PackedTags2 pt;
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48
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49 int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt);
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50 void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t : (void *)&pt;
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51
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52 T(YAFFS_TRACE_MTD,
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53 (TSTR
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54 ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
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55 TENDSTR), chunkInNAND, data, tags));
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58 addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk;
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60 /* For yaffs2 writing there must be both data and tags.
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61 * If we're using inband tags, then the tags are stuffed into
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62 * the end of the data buffer.
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63 */
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64 if (!data || !tags)
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65 BUG();
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66 else if (dev->param.inbandTags) {
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67 yaffs_PackedTags2TagsPart *pt2tp;
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68 pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
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69 yaffs_PackTags2TagsPart(pt2tp, tags);
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70 } else
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71 yaffs_PackTags2(&pt, tags, !dev->param.noTagsECC);
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73 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
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74 ops.mode = MTD_OOB_AUTO;
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75 ops.ooblen = (dev->param.inbandTags) ? 0 : packed_tags_size;
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76 ops.len = dev->param.totalBytesPerChunk;
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77 ops.ooboffs = 0;
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78 ops.datbuf = (__u8 *)data;
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79 ops.oobbuf = (dev->param.inbandTags) ? NULL : packed_tags_ptr;
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80 retval = mtd->write_oob(mtd, addr, &ops);
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82 #else
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83 if (!dev->param.inbandTags) {
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84 retval =
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85 mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
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86 &dummy, data, (__u8 *) packed_tags_ptr, NULL);
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87 } else {
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88 retval =
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89 mtd->write(mtd, addr, dev->param.totalBytesPerChunk, &dummy,
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90 data);
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91 }
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92 #endif
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93
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94 if (retval == 0)
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95 return YAFFS_OK;
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96 else
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97 return YAFFS_FAIL;
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98 }
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99
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100 int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
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101 __u8 *data, yaffs_ExtendedTags *tags)
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102 {
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103 struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd;
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104 #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
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105 struct mtd_oob_ops ops;
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106 #endif
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107 size_t dummy;
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108 int retval = 0;
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109 int localData = 0;
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111 loff_t addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk;
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112
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113 yaffs_PackedTags2 pt;
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114
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115 int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt);
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116 void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t: (void *)&pt;
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117
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118 T(YAFFS_TRACE_MTD,
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119 (TSTR
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120 ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
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121 TENDSTR), chunkInNAND, data, tags));
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122
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123 if (dev->param.inbandTags) {
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124
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125 if (!data) {
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126 localData = 1;
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127 data = yaffs_GetTempBuffer(dev, __LINE__);
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128 }
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131 }
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133
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134 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
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135 if (dev->param.inbandTags || (data && !tags))
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136 retval = mtd->read(mtd, addr, dev->param.totalBytesPerChunk,
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137 &dummy, data);
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138 else if (tags) {
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139 ops.mode = MTD_OOB_AUTO;
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140 ops.ooblen = packed_tags_size;
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141 ops.len = data ? dev->nDataBytesPerChunk : packed_tags_size;
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142 ops.ooboffs = 0;
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143 ops.datbuf = data;
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144 ops.oobbuf = yaffs_DeviceToContext(dev)->spareBuffer;
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145 retval = mtd->read_oob(mtd, addr, &ops);
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146 }
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147 #else
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148 if (!dev->param.inbandTags && data && tags) {
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149
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150 retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
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151 &dummy, data, dev->spareBuffer,
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152 NULL);
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153 } else {
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154 if (data)
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155 retval =
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156 mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
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157 data);
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158 if (!dev->param.inbandTags && tags)
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159 retval =
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160 mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
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161 dev->spareBuffer);
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162 }
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163 #endif
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164
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165
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166 if (dev->param.inbandTags) {
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167 if (tags) {
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168 yaffs_PackedTags2TagsPart *pt2tp;
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169 pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
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170 yaffs_UnpackTags2TagsPart(tags, pt2tp);
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171 }
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172 } else {
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173 if (tags) {
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174 memcpy(packed_tags_ptr, yaffs_DeviceToContext(dev)->spareBuffer, packed_tags_size);
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175 yaffs_UnpackTags2(tags, &pt, !dev->param.noTagsECC);
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176 }
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177 }
198
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178
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179 if (localData)
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180 yaffs_ReleaseTempBuffer(dev, data, __LINE__);
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181
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182 if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) {
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183 tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
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184 dev->eccUnfixed++;
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185 }
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186 if(tags && retval == -EUCLEAN && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) {
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187 tags->eccResult = YAFFS_ECC_RESULT_FIXED;
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188 dev->eccFixed++;
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189 }
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190 if (retval == 0)
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191 return YAFFS_OK;
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192 else
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193 return YAFFS_FAIL;
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194 }
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195
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196 int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
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197 {
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198 struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd;
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199 int retval;
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200 T(YAFFS_TRACE_MTD,
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201 (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
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202
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203 retval =
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204 mtd->block_markbad(mtd,
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205 blockNo * dev->param.nChunksPerBlock *
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206 dev->param.totalBytesPerChunk);
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207
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208 if (retval == 0)
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209 return YAFFS_OK;
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210 else
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211 return YAFFS_FAIL;
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212
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213 }
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214
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215 int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
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216 yaffs_BlockState *state, __u32 *sequenceNumber)
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217 {
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218 struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd;
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219 int retval;
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220
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221 T(YAFFS_TRACE_MTD,
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222 (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
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223 retval =
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224 mtd->block_isbad(mtd,
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225 blockNo * dev->param.nChunksPerBlock *
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226 dev->param.totalBytesPerChunk);
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227
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228 if (retval) {
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229 T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
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230
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231 *state = YAFFS_BLOCK_STATE_DEAD;
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232 *sequenceNumber = 0;
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233 } else {
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234 yaffs_ExtendedTags t;
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235 nandmtd2_ReadChunkWithTagsFromNAND(dev,
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236 blockNo *
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237 dev->param.nChunksPerBlock, NULL,
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238 &t);
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239
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240 if (t.chunkUsed) {
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241 *sequenceNumber = t.sequenceNumber;
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242 *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
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243 } else {
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244 *sequenceNumber = 0;
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245 *state = YAFFS_BLOCK_STATE_EMPTY;
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246 }
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247 }
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248 T(YAFFS_TRACE_MTD,
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249 (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
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250 *state));
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251
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252 if (retval == 0)
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253 return YAFFS_OK;
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254 else
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255 return YAFFS_FAIL;
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256 }
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257