/*
- * YAFFS: Yet another FFS. A NAND-flash specific file system.
- * yaffs_tagscompat.h: Tags compatability layer to use YAFFS1 formatted NAND.
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002 Aleph One Ltd.
+ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
- * $Id: yaffs_tagscompat.c,v 1.7 2005-09-20 23:12:38 charles Exp $
*/
#include "yaffs_guts.h"
#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_HandleReadDataError(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_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);
#endif
static const char yaffs_countBitsTable[256] = {
4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
};
-static int yaffs_CountBits(__u8 x)
+int yaffs_CountBits(__u8 x)
{
int retVal;
retVal = yaffs_countBitsTable[x];
/********** Tags ECC calculations *********/
-void yaffs_CalcECC(const __u8 * data, yaffs_Spare * spare)
+void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
{
yaffs_ECCCalculate(data, spare->ecc1);
yaffs_ECCCalculate(&data[256], spare->ecc2);
}
-void yaffs_CalcTagsECC(yaffs_Tags * tags)
+void yaffs_CalcTagsECC(yaffs_Tags *tags)
{
/* Calculate an ecc */
for (i = 0; i < 8; i++) {
for (j = 1; j & 0xff; j <<= 1) {
bit++;
- if (b[i] & j) {
+ if (b[i] & j)
ecc ^= bit;
- }
}
}
}
-int yaffs_CheckECCOnTags(yaffs_Tags * tags)
+int yaffs_CheckECCOnTags(yaffs_Tags *tags)
{
unsigned ecc = tags->ecc;
/********** Tags **********/
-static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr,
- yaffs_Tags * tagsPtr)
+static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr,
+ yaffs_Tags *tagsPtr)
{
yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
sparePtr->tagByte7 = tu->asBytes[7];
}
-static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr,
- yaffs_Tags * tagsPtr)
+static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,
+ yaffs_Tags *tagsPtr)
{
yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr;
int result;
tu->asBytes[7] = sparePtr->tagByte7;
result = yaffs_CheckECCOnTags(tagsPtr);
- if (result > 0) {
+ 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_SpareInitialise(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)
+ 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,
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 */
/* Must allocate enough memory for spare+2*sizeof(int) */
/* for ecc results from device. */
struct yaffs_NANDSpare 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) {
static int yaffs_CheckChunkErased(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);
* Functions for robustisizing
*/
-static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND)
+static void yaffs_HandleReadDataError(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_GetBlockInfo(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1;
T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
(TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND));
}
#ifdef NOTYET
-static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND)
+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_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_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND,
+ const yaffs_Spare *spare)
{
}
-static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND)
+static void yaffs_HandleWriteChunkError(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_DeleteChunk(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_VerifyCompare(const __u8 *d0, const __u8 *d1,
+ const yaffs_Spare *s0, const yaffs_Spare *s1)
{
if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 ||
}
#endif /* NOTYET */
-int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev,
- int chunkInNAND,
- const __u8 * data,
- const yaffs_ExtendedTags *
- eTags)
+int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev,
+ int chunkInNAND,
+ const __u8 *data,
+ const yaffs_ExtendedTags *eTags)
{
yaffs_Spare spare;
yaffs_Tags tags;
yaffs_SpareInitialise(&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) {
+ if (!dev->param.useNANDECC && data)
yaffs_CalcECC(data, &spare);
- }
+
yaffs_LoadTagsIntoSpare(&spare, &tags);
}
return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare);
}
-int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
+int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,
int chunkInNAND,
- __u8 * data,
- yaffs_ExtendedTags * eTags)
+ __u8 *data,
+ yaffs_ExtendedTags *eTags)
{
yaffs_Spare spare;
yaffs_Tags tags;
- yaffs_ECCResult eccResult;
+ yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_UNKNOWN;
static yaffs_Spare spareFF;
static int init;
int deleted =
(yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
- yaffs_GetTagsFromSpare(dev, &spare, &tags);
-
eTags->chunkDeleted = deleted;
- eTags->objectId = tags.objectId;
- eTags->chunkId = tags.chunkId;
- eTags->byteCount = tags.byteCount;
- eTags->serialNumber = tags.serialNumber;
eTags->eccResult = eccResult;
eTags->blockBad = 0; /* We're reading it */
/* therefore it is not a bad block */
-
eTags->chunkUsed =
(memcmp(&spareFF, &spare, sizeof(spareFF)) !=
0) ? 1 : 0;
+
+ if (eTags->chunkUsed) {
+ yaffs_GetTagsFromSpare(dev, &spare, &tags);
+
+ eTags->objectId = tags.objectId;
+ eTags->chunkId = tags.chunkId;
+ eTags->byteCount = tags.byteCountLSB;
+
+ if (dev->nDataBytesPerChunk >= 1024)
+ eTags->byteCount |= (((unsigned) tags.byteCountMSB) << 10);
+
+ eTags->serialNumber = tags.serialNumber;
+ }
}
return YAFFS_OK;
spare.blockStatus = 'Y';
- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL,
+ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->param.nChunksPerBlock, NULL,
&spare);
- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1,
+ yaffs_WriteChunkToNAND(dev, blockInNAND * dev->param.nChunksPerBlock + 1,
NULL, &spare);
return YAFFS_OK;
}
int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
- int blockNo, yaffs_BlockState *
- state,
- int *sequenceNumber)
+ int blockNo,
+ yaffs_BlockState *state,
+ __u32 *sequenceNumber)
{
yaffs_Spare spare0, spare1;
*sequenceNumber = 0;
- yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL,
+ yaffs_ReadChunkFromNAND(dev, blockNo * dev->param.nChunksPerBlock, NULL,
&spare0, &dummy, 1);
- yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL,
+ yaffs_ReadChunkFromNAND(dev, blockNo * dev->param.nChunksPerBlock + 1, NULL,
&spare1, &dummy, 1);
if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
projects / yaffs2.git / blobdiff