X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_tagscompat.c;h=71cac82f12570de637f513907ac3169da59ad4c5;hp=3e5e8a40b22cc25c4c962f74cdbe903b779e6005;hb=e33554a67753729f6b74677473cf0ec3b8d35a7e;hpb=bfa43f4358046a6a6ff8da6a05e8090eef29c083 diff --git a/yaffs_tagscompat.c b/yaffs_tagscompat.c index 3e5e8a4..71cac82 100644 --- a/yaffs_tagscompat.c +++ b/yaffs_tagscompat.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2010 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning @@ -15,19 +15,20 @@ #include "yaffs_tagscompat.h" #include "yaffs_ecc.h" #include "yaffs_getblockinfo.h" +#include "yaffs_trace.h" -static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND); +static void yaffs_handle_rd_data_error(yaffs_Device *dev, int chunkInNAND); #ifdef NOTYET -static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND); -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_Spare * spare); -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_Spare * spare); -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND); +static void yaffs_check_written_block(yaffs_Device *dev, int chunkInNAND); +static void yaffs_handle_chunk_wr_ok(yaffs_Device *dev, int chunkInNAND, + const __u8 *data, + const yaffs_Spare *spare); +static void yaffs_handle_chunk_update(yaffs_Device *dev, int chunkInNAND, + const yaffs_Spare *spare); +static void yaffs_handle_chunk_wr_error(yaffs_Device *dev, int chunkInNAND); #endif -static const char yaffs_countBitsTable[256] = { +static const char yaffs_count_bits_table[256] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, @@ -46,22 +47,22 @@ static const char yaffs_countBitsTable[256] = { 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 }; -int yaffs_CountBits(__u8 x) +int yaffs_count_bits(__u8 x) { int retVal; - retVal = yaffs_countBitsTable[x]; + retVal = yaffs_count_bits_table[x]; return retVal; } /********** Tags ECC calculations *********/ -void yaffs_CalcECC(const __u8 * data, yaffs_Spare * spare) +void yaffs_calc_ecc(const __u8 *data, yaffs_Spare *spare) { - yaffs_ECCCalculate(data, spare->ecc1); - yaffs_ECCCalculate(&data[256], spare->ecc2); + yaffs_ecc_cacl(data, spare->ecc1); + yaffs_ecc_cacl(&data[256], spare->ecc2); } -void yaffs_CalcTagsECC(yaffs_Tags * tags) +void yaffs_calc_tags_ecc(yaffs_Tags *tags) { /* Calculate an ecc */ @@ -75,9 +76,8 @@ void yaffs_CalcTagsECC(yaffs_Tags * tags) for (i = 0; i < 8; i++) { for (j = 1; j & 0xff; j <<= 1) { bit++; - if (b[i] & j) { + if (b[i] & j) ecc ^= bit; - } } } @@ -85,11 +85,11 @@ void yaffs_CalcTagsECC(yaffs_Tags * tags) } -int yaffs_CheckECCOnTags(yaffs_Tags * tags) +int yaffs_check_tags_ecc(yaffs_Tags *tags) { unsigned ecc = tags->ecc; - yaffs_CalcTagsECC(tags); + yaffs_calc_tags_ecc(tags); ecc ^= tags->ecc; @@ -102,7 +102,7 @@ int yaffs_CheckECCOnTags(yaffs_Tags * tags) b[ecc / 8] ^= (1 << (ecc & 7)); /* Now recvalc the ecc */ - yaffs_CalcTagsECC(tags); + yaffs_calc_tags_ecc(tags); return 1; /* recovered error */ } else if (ecc) { @@ -116,12 +116,12 @@ int yaffs_CheckECCOnTags(yaffs_Tags * tags) /********** Tags **********/ -static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr, - yaffs_Tags * tagsPtr) +static void yaffs_load_tags_to_spare(yaffs_Spare *sparePtr, + yaffs_Tags *tagsPtr) { yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; - yaffs_CalcTagsECC(tagsPtr); + yaffs_calc_tags_ecc(tagsPtr); sparePtr->tagByte0 = tu->asBytes[0]; sparePtr->tagByte1 = tu->asBytes[1]; @@ -133,8 +133,8 @@ static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr, sparePtr->tagByte7 = tu->asBytes[7]; } -static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr, - yaffs_Tags * tagsPtr) +static void yaffs_get_tags_from_spare(yaffs_Device *dev, yaffs_Spare *sparePtr, + yaffs_Tags *tagsPtr) { yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; int result; @@ -148,66 +148,62 @@ static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr, tu->asBytes[6] = sparePtr->tagByte6; tu->asBytes[7] = sparePtr->tagByte7; - result = yaffs_CheckECCOnTags(tagsPtr); - if (result > 0) { + result = yaffs_check_tags_ecc(tagsPtr); + if (result > 0) dev->tagsEccFixed++; - } else if (result < 0) { + else if (result < 0) dev->tagsEccUnfixed++; - } } -static void yaffs_SpareInitialise(yaffs_Spare * spare) +static void yaffs_spare_init(yaffs_Spare *spare) { memset(spare, 0xFF, sizeof(yaffs_Spare)); } -static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, const __u8 * data, - yaffs_Spare * spare) +static int yaffs_wr_nand(struct yaffs_DeviceStruct *dev, + int chunkInNAND, const __u8 *data, + yaffs_Spare *spare) { - if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) { + if (chunkInNAND < dev->param.startBlock * dev->param.nChunksPerBlock) { T(YAFFS_TRACE_ERROR, (TSTR("**>> yaffs chunk %d is not valid" TENDSTR), chunkInNAND)); return YAFFS_FAIL; } - dev->nPageWrites++; - return dev->writeChunkToNAND(dev, chunkInNAND, data, spare); + return dev->param.writeChunkToNAND(dev, chunkInNAND, data, spare); } -static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, +static int yaffs_rd_chunk_nand(struct yaffs_DeviceStruct *dev, int chunkInNAND, - __u8 * data, - yaffs_Spare * spare, - yaffs_ECCResult * eccResult, + __u8 *data, + yaffs_Spare *spare, + yaffs_ECCResult *eccResult, int doErrorCorrection) { int retVal; yaffs_Spare localSpare; - dev->nPageReads++; - if (!spare && data) { /* If we don't have a real spare, then we use a local one. */ /* Need this for the calculation of the ecc */ spare = &localSpare; } - if (!dev->useNANDECC) { - retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare); + if (!dev->param.useNANDECC) { + retVal = dev->param.readChunkFromNAND(dev, chunkInNAND, data, spare); if (data && doErrorCorrection) { /* Do ECC correction */ /* Todo handle any errors */ int eccResult1, eccResult2; __u8 calcEcc[3]; - yaffs_ECCCalculate(data, calcEcc); + yaffs_ecc_cacl(data, calcEcc); eccResult1 = - yaffs_ECCCorrect(data, spare->ecc1, calcEcc); - yaffs_ECCCalculate(&data[256], calcEcc); + yaffs_ecc_correct(data, spare->ecc1, calcEcc); + yaffs_ecc_cacl(&data[256], calcEcc); eccResult2 = - yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc); + yaffs_ecc_correct(&data[256], spare->ecc2, calcEcc); if (eccResult1 > 0) { T(YAFFS_TRACE_ERROR, @@ -239,7 +235,7 @@ static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, if (eccResult1 || eccResult2) { /* We had a data problem on this page */ - yaffs_HandleReadDataError(dev, chunkInNAND); + yaffs_handle_rd_data_error(dev, chunkInNAND); } if (eccResult1 < 0 || eccResult2 < 0) @@ -253,12 +249,11 @@ static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, /* Must allocate enough memory for spare+2*sizeof(int) */ /* for ecc results from device. */ struct yaffs_NANDSpare nspare; - - memset(&nspare,0,sizeof(nspare)); - - retVal = - dev->readChunkFromNAND(dev, chunkInNAND, data, - (yaffs_Spare *) & nspare); + + memset(&nspare, 0, sizeof(nspare)); + + retVal = dev->param.readChunkFromNAND(dev, chunkInNAND, data, + (yaffs_Spare *) &nspare); memcpy(spare, &nspare, sizeof(yaffs_Spare)); if (data && doErrorCorrection) { if (nspare.eccres1 > 0) { @@ -287,7 +282,7 @@ static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, if (nspare.eccres1 || nspare.eccres2) { /* We had a data problem on this page */ - yaffs_HandleReadDataError(dev, chunkInNAND); + yaffs_handle_rd_data_error(dev, chunkInNAND); } if (nspare.eccres1 < 0 || nspare.eccres2 < 0) @@ -303,18 +298,17 @@ static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, } #ifdef NOTYET -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, +static int yaffs_check_chunk_erased(struct yaffs_DeviceStruct *dev, int chunkInNAND) { - - static int init = 0; + static int init; static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK]; static __u8 data[YAFFS_BYTES_PER_CHUNK]; /* Might as well always allocate the larger size for */ - /* dev->useNANDECC == true; */ + /* dev->param.useNANDECC == true; */ static __u8 spare[sizeof(struct yaffs_NANDSpare)]; - dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare); + dev->param.readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare); if (!init) { memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK); @@ -335,12 +329,12 @@ static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, * Functions for robustisizing */ -static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND) +static void yaffs_handle_rd_data_error(yaffs_Device *dev, int chunkInNAND) { - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; + int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock; /* Mark the block for retirement */ - yaffs_GetBlockInfo(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1; + yaffs_get_block_info(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1; T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND)); @@ -352,33 +346,33 @@ static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND) } #ifdef NOTYET -static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND) +static void yaffs_check_written_block(yaffs_Device *dev, int chunkInNAND) { } -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_Spare * spare) +static void yaffs_handle_chunk_wr_ok(yaffs_Device *dev, int chunkInNAND, + const __u8 *data, + const yaffs_Spare *spare) { } -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_Spare * spare) +static void yaffs_handle_chunk_update(yaffs_Device *dev, int chunkInNAND, + const yaffs_Spare *spare) { } -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND) +static void yaffs_handle_chunk_wr_error(yaffs_Device *dev, int chunkInNAND) { - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; + int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock; /* Mark the block for retirement */ - yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; + yaffs_get_block_info(dev, blockInNAND)->needsRetiring = 1; /* Delete the chunk */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); + yaffs_chunk_del(dev, chunkInNAND, 1, __LINE__); } -static int yaffs_VerifyCompare(const __u8 * d0, const __u8 * d1, - const yaffs_Spare * s0, const yaffs_Spare * s1) +static int yaffs_verify_cmp(const __u8 *d0, const __u8 *d1, + const yaffs_Spare *s0, const yaffs_Spare *s1) { if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 || @@ -402,39 +396,46 @@ static int yaffs_VerifyCompare(const __u8 * d0, const __u8 * d1, } #endif /* NOTYET */ -int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * - eTags) +int yaffs_tags_compat_wr(yaffs_Device *dev, + int chunkInNAND, + const __u8 *data, + const yaffs_ExtendedTags *eTags) { yaffs_Spare spare; yaffs_Tags tags; - yaffs_SpareInitialise(&spare); + yaffs_spare_init(&spare); - if (eTags->chunkDeleted) { + if (eTags->chunkDeleted) spare.pageStatus = 0; - } else { + else { tags.objectId = eTags->objectId; tags.chunkId = eTags->chunkId; - tags.byteCount = eTags->byteCount; + + tags.byteCountLSB = eTags->byteCount & 0x3ff; + + if (dev->nDataBytesPerChunk >= 1024) + tags.byteCountMSB = (eTags->byteCount >> 10) & 3; + else + tags.byteCountMSB = 3; + + tags.serialNumber = eTags->serialNumber; - if (!dev->useNANDECC && data) { - yaffs_CalcECC(data, &spare); - } - yaffs_LoadTagsIntoSpare(&spare, &tags); + if (!dev->param.useNANDECC && data) + yaffs_calc_ecc(data, &spare); + + yaffs_load_tags_to_spare(&spare, &tags); } - return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare); + return yaffs_wr_nand(dev, chunkInNAND, data, &spare); } -int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev, +int yaffs_tags_compat_rd(yaffs_Device *dev, int chunkInNAND, - __u8 * data, - yaffs_ExtendedTags * eTags) + __u8 *data, + yaffs_ExtendedTags *eTags) { yaffs_Spare spare; @@ -442,20 +443,20 @@ int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev, yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_UNKNOWN; static yaffs_Spare spareFF; - static int init = 0; + static int init; if (!init) { memset(&spareFF, 0xFF, sizeof(spareFF)); init = 1; } - if (yaffs_ReadChunkFromNAND + if (yaffs_rd_chunk_nand (dev, chunkInNAND, data, &spare, &eccResult, 1)) { /* eTags may be NULL */ if (eTags) { int deleted = - (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0; + (yaffs_count_bits(spare.pageStatus) < 7) ? 1 : 0; eTags->chunkDeleted = deleted; eTags->eccResult = eccResult; @@ -466,11 +467,15 @@ int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev, 0) ? 1 : 0; if (eTags->chunkUsed) { - yaffs_GetTagsFromSpare(dev, &spare, &tags); + yaffs_get_tags_from_spare(dev, &spare, &tags); eTags->objectId = tags.objectId; eTags->chunkId = tags.chunkId; - eTags->byteCount = tags.byteCount; + eTags->byteCount = tags.byteCountLSB; + + if (dev->nDataBytesPerChunk >= 1024) + eTags->byteCount |= (((unsigned) tags.byteCountMSB) << 10); + eTags->serialNumber = tags.serialNumber; } } @@ -481,7 +486,7 @@ int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev, } } -int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, +int yaffs_tags_compat_mark_bad(struct yaffs_DeviceStruct *dev, int blockInNAND) { @@ -491,16 +496,16 @@ int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, spare.blockStatus = 'Y'; - yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL, + yaffs_wr_nand(dev, blockInNAND * dev->param.nChunksPerBlock, NULL, &spare); - yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, + yaffs_wr_nand(dev, blockInNAND * dev->param.nChunksPerBlock + 1, NULL, &spare); return YAFFS_OK; } -int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, +int yaffs_tags_compat_query_block(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, __u32 *sequenceNumber) @@ -518,12 +523,12 @@ int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, *sequenceNumber = 0; - yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL, + yaffs_rd_chunk_nand(dev, blockNo * dev->param.nChunksPerBlock, NULL, &spare0, &dummy, 1); - yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL, + yaffs_rd_chunk_nand(dev, blockNo * dev->param.nChunksPerBlock + 1, NULL, &spare1, &dummy, 1); - if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7) + if (yaffs_count_bits(spare0.blockStatus & spare1.blockStatus) < 7) *state = YAFFS_BLOCK_STATE_DEAD; else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0) *state = YAFFS_BLOCK_STATE_EMPTY;