/*
- * 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) 2002-2010 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 1.3 2005-07-31 06:47:12 marty 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);
-#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);
-#endif
-
-
-static const char yaffs_countBitsTable[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,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
-1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
-2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
-3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
-3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
-4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
-};
-
-static int yaffs_CountBits(__u8 x)
-{
- int retVal;
- retVal = yaffs_countBitsTable[x];
- return retVal;
-}
+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk);
-/////////////// Tags ECC calculations ///////////////////
+/********** Tags ECC calculations *********/
-void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
+void yaffs_calc_ecc(const u8 * data, struct 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(struct yaffs_tags *tags)
{
- // Calculate an ecc
+ /* Calculate an ecc */
- unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
- unsigned i,j;
- unsigned ecc = 0;
+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
+ unsigned i, j;
+ unsigned ecc = 0;
unsigned bit = 0;
tags->ecc = 0;
- for(i = 0; i < 8; i++)
- {
- for(j = 1; j &0xff; j<<=1)
- {
+ for (i = 0; i < 8; i++) {
+ for (j = 1; j & 0xff; j <<= 1) {
bit++;
- if(b[i] & j)
- {
+ if (b[i] & j)
ecc ^= bit;
- }
}
}
tags->ecc = ecc;
-
}
-int yaffs_CheckECCOnTags(yaffs_Tags *tags)
+int yaffs_check_tags_ecc(struct yaffs_tags *tags)
{
unsigned ecc = tags->ecc;
- yaffs_CalcTagsECC(tags);
+ yaffs_calc_tags_ecc(tags);
ecc ^= tags->ecc;
-
- if(ecc && ecc <= 64)
- {
- // TODO: Handle the failure better. Retire?
- unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
+
+ if (ecc && ecc <= 64) {
+ /* TODO: Handle the failure better. Retire? */
+ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes;
ecc--;
b[ecc / 8] ^= (1 << (ecc & 7));
- // Now recvalc the ecc
- yaffs_CalcTagsECC(tags);
+ /* Now recvalc the ecc */
+ yaffs_calc_tags_ecc(tags);
- return 1; // recovered error
- }
- else if(ecc)
- {
- // Wierd ecc failure value
- // TODO Need to do somethiong here
- return -1; //unrecovered error
+ return 1; /* recovered error */
+ } else if (ecc) {
+ /* Wierd ecc failure value */
+ /* TODO Need to do somethiong here */
+ return -1; /* unrecovered error */
}
return 0;
}
-//////////////////////////// Tags ///////////////////////////////////////
+/********** Tags **********/
-static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr)
+static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr,
+ struct yaffs_tags *tags_ptr)
{
- yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
-
- yaffs_CalcTagsECC(tagsPtr);
-
- sparePtr->tagByte0 = tu->asBytes[0];
- sparePtr->tagByte1 = tu->asBytes[1];
- sparePtr->tagByte2 = tu->asBytes[2];
- sparePtr->tagByte3 = tu->asBytes[3];
- sparePtr->tagByte4 = tu->asBytes[4];
- sparePtr->tagByte5 = tu->asBytes[5];
- sparePtr->tagByte6 = tu->asBytes[6];
- sparePtr->tagByte7 = tu->asBytes[7];
+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
+
+ yaffs_calc_tags_ecc(tags_ptr);
+
+ spare_ptr->tb0 = tu->as_bytes[0];
+ spare_ptr->tb1 = tu->as_bytes[1];
+ spare_ptr->tb2 = tu->as_bytes[2];
+ spare_ptr->tb3 = tu->as_bytes[3];
+ spare_ptr->tb4 = tu->as_bytes[4];
+ spare_ptr->tb5 = tu->as_bytes[5];
+ spare_ptr->tb6 = tu->as_bytes[6];
+ spare_ptr->tb7 = tu->as_bytes[7];
}
-static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr,yaffs_Tags *tagsPtr)
+static void yaffs_get_tags_from_spare(struct yaffs_dev *dev,
+ struct yaffs_spare *spare_ptr,
+ struct yaffs_tags *tags_ptr)
{
- yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
+ union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr;
int result;
- tu->asBytes[0]= sparePtr->tagByte0;
- tu->asBytes[1]= sparePtr->tagByte1;
- tu->asBytes[2]= sparePtr->tagByte2;
- tu->asBytes[3]= sparePtr->tagByte3;
- tu->asBytes[4]= sparePtr->tagByte4;
- tu->asBytes[5]= sparePtr->tagByte5;
- tu->asBytes[6]= sparePtr->tagByte6;
- tu->asBytes[7]= sparePtr->tagByte7;
-
- result = yaffs_CheckECCOnTags(tagsPtr);
- if(result> 0)
- {
- dev->tagsEccFixed++;
- }
- else if(result <0)
- {
- dev->tagsEccUnfixed++;
- }
+ tu->as_bytes[0] = spare_ptr->tb0;
+ tu->as_bytes[1] = spare_ptr->tb1;
+ tu->as_bytes[2] = spare_ptr->tb2;
+ tu->as_bytes[3] = spare_ptr->tb3;
+ tu->as_bytes[4] = spare_ptr->tb4;
+ tu->as_bytes[5] = spare_ptr->tb5;
+ tu->as_bytes[6] = spare_ptr->tb6;
+ tu->as_bytes[7] = spare_ptr->tb7;
+
+ result = yaffs_check_tags_ecc(tags_ptr);
+ if (result > 0)
+ dev->n_tags_ecc_fixed++;
+ else if (result < 0)
+ dev->n_tags_ecc_unfixed++;
}
-static void yaffs_SpareInitialise(yaffs_Spare *spare)
+static void yaffs_spare_init(struct yaffs_spare *spare)
{
- memset(spare,0xFF,sizeof(yaffs_Spare));
+ memset(spare, 0xFF, sizeof(struct 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_dev *dev,
+ int nand_chunk, const u8 * data,
+ struct yaffs_spare *spare)
{
- if(chunkInNAND < dev->startBlock * dev->nChunksPerBlock)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d is not valid" TENDSTR),chunkInNAND));
+ if (nand_chunk < dev->param.start_block * dev->param.chunks_per_block) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>> yaffs chunk %d is not valid",
+ nand_chunk);
return YAFFS_FAIL;
}
- dev->nPageWrites++;
- return dev->writeChunkToNAND(dev,chunkInNAND,data,spare);
+ return dev->param.write_chunk_fn(dev, nand_chunk, data, spare);
}
-
-
-static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev,
- int chunkInNAND,
- __u8 *data,
- yaffs_Spare *spare,
- yaffs_ECCResult *eccResult,
- int doErrorCorrection)
+static int yaffs_rd_chunk_nand(struct yaffs_dev *dev,
+ int nand_chunk,
+ u8 * data,
+ struct yaffs_spare *spare,
+ enum yaffs_ecc_result *ecc_result,
+ int correct_errors)
{
- 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;
+ int ret_val;
+ struct yaffs_spare local_spare;
+
+ 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 = &local_spare;
}
-
-
- if(!dev->useNANDECC)
- {
- retVal = dev->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);
- eccResult1 = yaffs_ECCCorrect (data,spare->ecc1, calcEcc);
- yaffs_ECCCalculate(&data[256],calcEcc);
- eccResult2 = yaffs_ECCCorrect(&data[256],spare->ecc2, calcEcc);
-
- if(eccResult1>0)
- {
- T(YAFFS_TRACE_ERROR, (TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND));
- dev->eccFixed++;
- }
- else if(eccResult1<0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND));
- dev->eccUnfixed++;
- }
- if(eccResult2>0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND));
- dev->eccFixed++;
+ if (!dev->param.use_nand_ecc) {
+ ret_val =
+ dev->param.read_chunk_fn(dev, nand_chunk, data, spare);
+ if (data && correct_errors) {
+ /* Do ECC correction */
+ /* Todo handle any errors */
+ int ecc_result1, ecc_result2;
+ u8 calc_ecc[3];
+
+ yaffs_ecc_cacl(data, calc_ecc);
+ ecc_result1 =
+ yaffs_ecc_correct(data, spare->ecc1, calc_ecc);
+ yaffs_ecc_cacl(&data[256], calc_ecc);
+ ecc_result2 =
+ yaffs_ecc_correct(&data[256], spare->ecc2,
+ calc_ecc);
+
+ if (ecc_result1 > 0) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>>yaffs ecc error fix performed on chunk %d:0",
+ nand_chunk);
+ dev->n_ecc_fixed++;
+ } else if (ecc_result1 < 0) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>>yaffs ecc error unfixed on chunk %d:0",
+ nand_chunk);
+ dev->n_ecc_unfixed++;
}
- else if(eccResult2<0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
- dev->eccUnfixed++;
+
+ if (ecc_result2 > 0) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>>yaffs ecc error fix performed on chunk %d:1",
+ nand_chunk);
+ dev->n_ecc_fixed++;
+ } else if (ecc_result2 < 0) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>>yaffs ecc error unfixed on chunk %d:1",
+ nand_chunk);
+ dev->n_ecc_unfixed++;
}
- if(eccResult1 || eccResult2)
- {
- // Hoosterman, we had a data problem on this page
- yaffs_HandleReadDataError(dev,chunkInNAND);
+ if (ecc_result1 || ecc_result2) {
+ /* We had a data problem on this page */
+ yaffs_handle_rd_data_error(dev, nand_chunk);
}
-
- if(eccResult1 < 0 || eccResult2 < 0)
- *eccResult = YAFFS_ECC_RESULT_UNFIXED;
- else if(eccResult1 > 0 || eccResult2 > 0)
- *eccResult = YAFFS_ECC_RESULT_FIXED;
+
+ if (ecc_result1 < 0 || ecc_result2 < 0)
+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
+ else if (ecc_result1 > 0 || ecc_result2 > 0)
+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
else
- *eccResult = YAFFS_ECC_RESULT_NO_ERROR;
+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
}
- }
- else
- {
- // 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);
- memcpy (spare, &nspare, sizeof(yaffs_Spare));
- if(data && doErrorCorrection)
- {
- if(nspare.eccres1>0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:0" TENDSTR),chunkInNAND));
- }
- else if(nspare.eccres1<0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:0" TENDSTR),chunkInNAND));
+ } else {
+ /* Must allocate enough memory for spare+2*sizeof(int) */
+ /* for ecc results from device. */
+ struct yaffs_nand_spare nspare;
+
+ memset(&nspare, 0, sizeof(nspare));
+
+ ret_val = dev->param.read_chunk_fn(dev, nand_chunk, data,
+ (struct yaffs_spare *)
+ &nspare);
+ memcpy(spare, &nspare, sizeof(struct yaffs_spare));
+ if (data && correct_errors) {
+ if (nspare.eccres1 > 0) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>>mtd ecc error fix performed on chunk %d:0",
+ nand_chunk);
+ } else if (nspare.eccres1 < 0) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>>mtd ecc error unfixed on chunk %d:0",
+ nand_chunk);
}
- if(nspare.eccres2>0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error fix performed on chunk %d:1" TENDSTR),chunkInNAND));
- }
- else if(nspare.eccres2<0)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk %d:1" TENDSTR),chunkInNAND));
+ if (nspare.eccres2 > 0) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>>mtd ecc error fix performed on chunk %d:1",
+ nand_chunk);
+ } else if (nspare.eccres2 < 0) {
+ yaffs_trace(YAFFS_TRACE_ERROR,
+ "**>>mtd ecc error unfixed on chunk %d:1",
+ nand_chunk);
}
- if(nspare.eccres1 || nspare.eccres2)
- {
- // Hoosterman, we had a data problem on this page
- yaffs_HandleReadDataError(dev,chunkInNAND);
+ if (nspare.eccres1 || nspare.eccres2) {
+ /* We had a data problem on this page */
+ yaffs_handle_rd_data_error(dev, nand_chunk);
}
-
- if(nspare.eccres1 < 0 || nspare.eccres2 < 0)
- *eccResult = YAFFS_ECC_RESULT_UNFIXED;
- else if(nspare.eccres1 > 0 || nspare.eccres2 > 0)
- *eccResult = YAFFS_ECC_RESULT_FIXED;
- else
- *eccResult = YAFFS_ECC_RESULT_NO_ERROR;
+ if (nspare.eccres1 < 0 || nspare.eccres2 < 0)
+ *ecc_result = YAFFS_ECC_RESULT_UNFIXED;
+ else if (nspare.eccres1 > 0 || nspare.eccres2 > 0)
+ *ecc_result = YAFFS_ECC_RESULT_FIXED;
+ else
+ *ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
}
}
- return retVal;
-}
-
-#ifdef NOTYET
-static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev,int chunkInNAND)
-{
-
- static int init = 0;
- 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;
- static __u8 spare[sizeof(struct yaffs_NANDSpare)];
-
- dev->readChunkFromNAND(dev,chunkInNAND,data,(yaffs_Spare *)spare);
-
- if(!init)
- {
- memset(cmpbuf,0xff,YAFFS_BYTES_PER_CHUNK);
- init = 1;
- }
-
- if(memcmp(cmpbuf,data,YAFFS_BYTES_PER_CHUNK)) return YAFFS_FAIL;
- if(memcmp(cmpbuf,spare,16)) return YAFFS_FAIL;
-
-
- return YAFFS_OK;
-
+ return ret_val;
}
-#endif
-#if 0
-int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,int blockInNAND)
-{
- dev->nBlockErasures++;
- return dev->eraseBlockInNAND(dev,blockInNAND);
-}
+/*
+ * Functions for robustisizing
+ */
-int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
+static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk)
{
- return dev->initialiseNAND(dev);
+ int flash_block = nand_chunk / dev->param.chunks_per_block;
+
+ /* Mark the block for retirement */
+ yaffs_get_block_info(dev,
+ flash_block + dev->block_offset)->needs_retiring =
+ 1;
+ yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,
+ "**>>Block %d marked for retirement",
+ flash_block);
+
+ /* TODO:
+ * Just do a garbage collection on the affected block
+ * then retire the block
+ * NB recursion
+ */
}
-#endif
-
-#if 0
-static int yaffs_WriteNewChunkToNAND(struct yaffs_DeviceStruct *dev, const __u8 *data, yaffs_Spare *spare,int useReserve)
+int yaffs_tags_compat_wr(struct yaffs_dev *dev,
+ int nand_chunk,
+ const u8 * data, const struct yaffs_ext_tags *ext_tags)
{
- int chunk;
+ struct yaffs_spare spare;
+ struct yaffs_tags tags;
- int writeOk = 1;
- int attempts = 0;
+ yaffs_spare_init(&spare);
- unsigned char rbData[YAFFS_BYTES_PER_CHUNK];
- yaffs_Spare rbSpare;
+ if (ext_tags->is_deleted)
+ spare.page_status = 0;
+ else {
+ tags.obj_id = ext_tags->obj_id;
+ tags.chunk_id = ext_tags->chunk_id;
- do{
- chunk = yaffs_AllocateChunk(dev,useReserve);
+ tags.n_bytes_lsb = ext_tags->n_bytes & 0x3ff;
- if(chunk >= 0)
- {
+ if (dev->data_bytes_per_chunk >= 1024)
+ tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3;
+ else
+ tags.n_bytes_msb = 3;
- // First check this chunk is erased...
-#ifndef CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
- writeOk = yaffs_CheckChunkErased(dev,chunk);
-#endif
- if(!writeOk)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs chunk %d was not erased" TENDSTR),chunk));
- }
- else
- {
- writeOk = yaffs_WriteChunkToNAND(dev,chunk,data,spare);
- }
- attempts++;
- if(writeOk)
- {
- // Readback & verify
- // If verify fails, then delete this chunk and try again
- // To verify we compare everything except the block and
- // page status bytes.
- // NB We check a raw read without ECC correction applied
- yaffs_ReadChunkFromNAND(dev,chunk,rbData,&rbSpare,0);
-
-#ifndef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
- if(!yaffs_VerifyCompare(data,rbData,spare,&rbSpare))
- {
- // Didn't verify
- T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write verify failed on chunk %d" TENDSTR), chunk));
-
- writeOk = 0;
- }
-#endif
+ tags.serial_number = ext_tags->serial_number;
- }
- if(writeOk)
- {
- // Copy the data into the write buffer.
- // NB We do this at the end to prevent duplicates in the case of a write error.
- //Todo
- yaffs_HandleWriteChunkOk(dev,chunk,data,spare);
- }
- else
- {
- yaffs_HandleWriteChunkError(dev,chunk);
- }
- }
+ if (!dev->param.use_nand_ecc && data)
+ yaffs_calc_ecc(data, &spare);
- } while(chunk >= 0 && ! writeOk);
+ yaffs_load_tags_to_spare(&spare, &tags);
- if(attempts > 1)
- {
- T(YAFFS_TRACE_ERROR,(TSTR("**>> yaffs write required %d attempts" TENDSTR),attempts));
- dev->nRetriedWrites+= (attempts - 1);
}
- return chunk;
+ return yaffs_wr_nand(dev, nand_chunk, data, &spare);
}
-#endif
-
-///
-// Functions for robustisizing
-//
-//
-#if 0
-
-static void yaffs_RetireBlock(yaffs_Device *dev,int blockInNAND)
+int yaffs_tags_compat_rd(struct yaffs_dev *dev,
+ int nand_chunk,
+ u8 * data, struct yaffs_ext_tags *ext_tags)
{
- // Ding the blockStatus in the first two pages of the block.
-
- yaffs_Spare spare;
-
- memset(&spare, 0xff,sizeof(yaffs_Spare));
- spare.blockStatus = 0;
+ struct yaffs_spare spare;
+ struct yaffs_tags tags;
+ enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN;
- // TODO change this retirement marking for other NAND types
- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL , &spare);
- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, NULL , &spare);
+ static struct yaffs_spare spare_ff;
+ static int init;
- yaffs_GetBlockInfo(dev,blockInNAND)->blockState = YAFFS_BLOCK_STATE_DEAD;
- dev->nRetiredBlocks++;
-}
-
-#endif
-
-#if 0
-static int yaffs_RewriteBufferedBlock(yaffs_Device *dev)
-{
- dev->doingBufferedBlockRewrite = 1;
- //
- // Remove erased chunks
- // Rewrite existing chunks to a new block
- // Set current write block to the new block
-
- dev->doingBufferedBlockRewrite = 0;
-
- return 1;
-}
-
-#endif
+ if (!init) {
+ memset(&spare_ff, 0xFF, sizeof(spare_ff));
+ init = 1;
+ }
-static void yaffs_HandleReadDataError(yaffs_Device *dev,int chunkInNAND)
-{
- int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
+ if (yaffs_rd_chunk_nand(dev, nand_chunk, data, &spare, &ecc_result, 1)) {
+ /* ext_tags may be NULL */
+ if (ext_tags) {
- // Mark the block for retirement
- yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
- T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS,(TSTR("**>>Block %d marked for retirement" TENDSTR),blockInNAND));
+ int deleted =
+ (hweight8(spare.page_status) < 7) ? 1 : 0;
+ ext_tags->is_deleted = deleted;
+ ext_tags->ecc_result = ecc_result;
+ ext_tags->block_bad = 0; /* We're reading it */
+ /* therefore it is not a bad block */
+ ext_tags->chunk_used =
+ (memcmp(&spare_ff, &spare, sizeof(spare_ff)) !=
+ 0) ? 1 : 0;
- //TODO
- // Just do a garbage collection on the affected block then retire the block
- // NB recursion
-}
+ if (ext_tags->chunk_used) {
+ yaffs_get_tags_from_spare(dev, &spare, &tags);
+ ext_tags->obj_id = tags.obj_id;
+ ext_tags->chunk_id = tags.chunk_id;
+ ext_tags->n_bytes = tags.n_bytes_lsb;
-#ifdef NOTYET
-static void yaffs_CheckWrittenBlock(yaffs_Device *dev,int chunkInNAND)
-{
-}
+ if (dev->data_bytes_per_chunk >= 1024)
+ ext_tags->n_bytes |=
+ (((unsigned)tags.
+ n_bytes_msb) << 10);
-static void yaffs_HandleWriteChunkOk(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare)
-{
-}
+ ext_tags->serial_number = tags.serial_number;
+ }
+ }
-static void yaffs_HandleUpdateChunk(yaffs_Device *dev,int chunkInNAND, const yaffs_Spare *spare)
-{
+ return YAFFS_OK;
+ } else {
+ return YAFFS_FAIL;
+ }
}
-static void yaffs_HandleWriteChunkError(yaffs_Device *dev,int chunkInNAND)
+int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block)
{
- int blockInNAND = chunkInNAND/dev->nChunksPerBlock;
-
- // Mark the block for retirement
- yaffs_GetBlockInfo(dev,blockInNAND)->needsRetiring = 1;
- // Delete the chunk
- yaffs_DeleteChunk(dev,chunkInNAND,1,__LINE__);
-}
-
+ struct yaffs_spare spare;
+ memset(&spare, 0xff, sizeof(struct yaffs_spare));
-static int yaffs_VerifyCompare(const __u8 *d0, const __u8 * d1, const yaffs_Spare *s0, const yaffs_Spare *s1)
-{
+ spare.block_status = 'Y';
+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL,
+ &spare);
+ yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1,
+ NULL, &spare);
- if( memcmp(d0,d1,YAFFS_BYTES_PER_CHUNK) != 0 ||
- s0->tagByte0 != s1->tagByte0 ||
- s0->tagByte1 != s1->tagByte1 ||
- s0->tagByte2 != s1->tagByte2 ||
- s0->tagByte3 != s1->tagByte3 ||
- s0->tagByte4 != s1->tagByte4 ||
- s0->tagByte5 != s1->tagByte5 ||
- s0->tagByte6 != s1->tagByte6 ||
- s0->tagByte7 != s1->tagByte7 ||
- s0->ecc1[0] != s1->ecc1[0] ||
- s0->ecc1[1] != s1->ecc1[1] ||
- s0->ecc1[2] != s1->ecc1[2] ||
- s0->ecc2[0] != s1->ecc2[0] ||
- s0->ecc2[1] != s1->ecc2[1] ||
- s0->ecc2[2] != s1->ecc2[2] )
- {
- return 0;
- }
+ return YAFFS_OK;
- return 1;
}
-#endif /* NOTYET */
-#if 0
-typedef struct
+int yaffs_tags_compat_query_block(struct yaffs_dev *dev,
+ int block_no,
+ enum yaffs_block_state *state,
+ u32 * seq_number)
{
- unsigned validMarker0;
- unsigned chunkUsed; // Status of the chunk: used or unused
- unsigned objectId; // If 0 then this is not part of an object (unused)
- unsigned chunkId; // If 0 then this is a header
- unsigned byteCount; // Only valid for data chunks
- // The following stuff only has meaning when we read
- yaffs_ECCResult eccResult; // Only valid when we read.
- unsigned blockBad; // Only valid on reading
-
- // YAFFS 1 stuff
- unsigned chunkDeleted; // The chunk is marked deleted
- unsigned serialNumber; // Yaffs1 2-bit serial number
-
- // YAFFS2 stuff
- unsigned sequenceNumber; // The sequence number of this block
-
- unsigned validMarker1;
+ struct yaffs_spare spare0, spare1;
+ static struct yaffs_spare spare_ff;
+ static int init;
+ enum yaffs_ecc_result dummy;
-} yaffs_ExtendedTags;
-
-
-typedef struct
-{
- unsigned chunkId:20;
- unsigned serialNumber:2;
- unsigned byteCount:10;
- unsigned objectId:18;
- unsigned ecc:12;
- unsigned unusedStuff:2;
-} yaffs_Tags;
-
-
-#endif
-
-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)
- {
- spare.pageStatus = 0;
- }
- else
- {
- tags.objectId = eTags->objectId;
- tags.chunkId = eTags->chunkId;
- tags.byteCount = eTags->byteCount;
- tags.serialNumber = eTags->serialNumber;
-
-// NCB
- if (!dev->useNANDECC && data)
- {
- yaffs_CalcECC(data,&spare);
- }
-
-// /NCB
- yaffs_LoadTagsIntoSpare(&spare,&tags);
-
+ if (!init) {
+ memset(&spare_ff, 0xFF, sizeof(spare_ff));
+ init = 1;
}
-
- return yaffs_WriteChunkToNAND(dev,chunkInNAND,data,&spare);
-}
+ *seq_number = 0;
-int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *eTags)
-{
+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block, NULL,
+ &spare0, &dummy, 1);
+ yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1,
+ NULL, &spare1, &dummy, 1);
- yaffs_Spare spare;
- yaffs_Tags tags;
- yaffs_ECCResult eccResult;
-
-// NCB
- static yaffs_Spare spareFF;
- static int init;
-
- if(!init)
- {
- memset(&spareFF,0xFF,sizeof(spareFF));
- init = 1;
- }
-// /NCB
- if(yaffs_ReadChunkFromNAND(dev,chunkInNAND,data,&spare,&eccResult,1))
- {
-// added NCB - eTags may be NULL
- if (eTags) {
-
- 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
-
-// NCB added 18/2/2005
- eTags->chunkUsed = (memcmp(&spareFF,&spare,sizeof(spareFF)) != 0) ? 1:0;
- }
-
- return YAFFS_OK;
- }
+ if (hweight8(spare0.block_status & spare1.block_status) < 7)
+ *state = YAFFS_BLOCK_STATE_DEAD;
+ else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0)
+ *state = YAFFS_BLOCK_STATE_EMPTY;
else
- {
- return YAFFS_FAIL;
- }
-}
-
-int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockInNAND)
-{
-
- yaffs_Spare spare;
+ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
- memset(&spare, 0xff,sizeof(yaffs_Spare));
-
- spare.blockStatus = 0;
-
- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL , &spare);
- yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, NULL , &spare);
-
return YAFFS_OK;
-
}
-
-
-int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber)
-{
-
- yaffs_Spare spare0,spare1;
- static yaffs_Spare spareFF;
- static int init;
- yaffs_ECCResult dummy;
-
- if(!init)
- {
- memset(&spareFF,0xFF,sizeof(spareFF));
- init = 1;
- }
-
- *sequenceNumber = 0;
-
- yaffs_ReadChunkFromNAND(dev,blockNo * dev->nChunksPerBlock,NULL,&spare0,&dummy,1);
- yaffs_ReadChunkFromNAND(dev,blockNo * dev->nChunksPerBlock + 1,NULL,&spare1,&dummy,1);
-
- if(yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
- *state = YAFFS_BLOCK_STATE_DEAD;
- else if(memcmp(&spareFF,&spare0,sizeof(spareFF)) == 0)
- *state = YAFFS_BLOCK_STATE_EMPTY;
- else
- *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
-
- return YAFFS_OK;
-}
-
projects / yaffs2.git / blobdiff