+++ /dev/null
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * 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.
- */
-
-/*
- * This provides a YAFFS nand emulation on a file for emulating 2kB pages.
- * This is only intended as test code to test persistence etc.
- */
-
-const char *yaffs_flashif2_c_version = "$Id: yaffs_fileem2k.c,v 1.24 2010-02-18 01:18:04 charles Exp $";
-
-
-#include "yportenv.h"
-#include "yaffs_trace.h"
-
-#include "yaffs_flashif2.h"
-#include "yaffs_guts.h"
-#include "devextras.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include "yaffs_fileem2k.h"
-#include "yaffs_packedtags2.h"
-
-
-
-#define REPORT_ERROR 0
-
-typedef struct
-{
- __u8 data[PAGE_SIZE]; // Data + spare
-} yflash_Page;
-
-typedef struct
-{
- yflash_Page page[PAGES_PER_BLOCK]; // The pages in the block
-
-} yflash_Block;
-
-
-
-#define MAX_HANDLES 20
-#define BLOCKS_PER_HANDLE (32*8)
-
-typedef struct
-{
- int handle[MAX_HANDLES];
- int nBlocks;
-} yflash_Device;
-
-static yflash_Device filedisk;
-
-int yaffs_testPartialWrite = 0;
-
-extern int random_seed;
-extern int simulate_power_failure;
-static int initialised = 0;
-static int remaining_ops;
-static int nops_so_far;
-
-int ops_multiplier;
-
-
-static void yflash2_MaybePowerFail(unsigned int chunkInNAND, int failPoint)
-{
-
- nops_so_far++;
-
-
- remaining_ops--;
- if(simulate_power_failure &&
- remaining_ops < 1){
- printf("Simulated power failure after %d operations\n",nops_so_far);
- printf(" power failed on chunkInNAND %d, at fail point %d\n",
- chunkInNAND, failPoint);
- exit(0);
- }
-}
-
-
-
-
-
-static __u8 localBuffer[PAGE_SIZE];
-
-static char *NToName(char *buf,int n)
-{
- sprintf(buf,"emfile-2k-%d",n);
- return buf;
-}
-
-static char dummyBuffer[BLOCK_SIZE];
-
-static int GetBlockFileHandle(int n)
-{
- int h;
- int requiredSize;
-
- char name[40];
- NToName(name,n);
- int fSize;
- int i;
-
- h = open(name, O_RDWR | O_CREAT, S_IREAD | S_IWRITE);
- if(h >= 0){
- fSize = lseek(h,0,SEEK_END);
- requiredSize = BLOCKS_PER_HANDLE * BLOCK_SIZE;
- if(fSize < requiredSize){
- for(i = 0; i < BLOCKS_PER_HANDLE; i++)
- if(write(h,dummyBuffer,BLOCK_SIZE) != BLOCK_SIZE)
- return -1;
-
- }
- }
-
- return h;
-
-}
-
-static int CheckInit(void)
-{
- static int initialised = 0;
- int i;
-
- int blk;
-
-
- if(initialised)
- {
- return YAFFS_OK;
- }
-
- initialised = 1;
-
-
- srand(random_seed);
- remaining_ops = (rand() % 1000) * 5;
- memset(dummyBuffer,0xff,sizeof(dummyBuffer));
-
-
-
- filedisk.nBlocks = SIZE_IN_MB * BLOCKS_PER_MB;
-
- for(i = 0; i < MAX_HANDLES; i++)
- filedisk.handle[i] = -1;
-
- for(i = 0,blk = 0; blk < filedisk.nBlocks; blk+=BLOCKS_PER_HANDLE,i++)
- filedisk.handle[i] = GetBlockFileHandle(i);
-
-
- return 1;
-}
-
-
-int yflash2_GetNumberOfBlocks(void)
-{
- CheckInit();
-
- return filedisk.nBlocks;
-}
-
-int yflash2_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_ExtendedTags *tags)
-{
- int written;
- int pos;
- int h;
- int i;
- int nRead;
- int error;
-
- T(YAFFS_TRACE_MTD,(TSTR("write chunk %d data %x tags %x" TENDSTR),chunkInNAND,(unsigned)data, (unsigned)tags));
-
- CheckInit();
-
-
- if(dev->param.inbandTags){
-
- yaffs_PackedTags2TagsPart * pt2tp;
- pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
- yaffs_PackTags2TagsPart(pt2tp,tags);
-
- pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
- h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
-
- lseek(h,pos,SEEK_SET);
- written = write(h,data,dev->param.totalBytesPerChunk);
-
-
- if(yaffs_testPartialWrite){
- close(h);
- exit(1);
- }
-
- if(written != dev->param.totalBytesPerChunk) return YAFFS_FAIL;
-
-
- }
-
- else {
- /* First do a write of a partial page */
- int n_partials;
- int bpos;
-
- if(data)
- {
- pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
- h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
-
-
- memcpy(localBuffer,data, dev->nDataBytesPerChunk);
-
- n_partials = rand()%20;
-
- for(i = 0; i < n_partials; i++){
- bpos = rand() % dev->nDataBytesPerChunk;
-
- localBuffer[bpos] |= (1 << (rand() & 7));
- }
-
- if(REPORT_ERROR && memcmp(localBuffer,data,dev->nDataBytesPerChunk))
- printf("nand simulator: data does not match\n");
-
- lseek(h,pos,SEEK_SET);
- written = write(h,localBuffer,dev->nDataBytesPerChunk);
-
- if(yaffs_testPartialWrite){
- close(h);
- exit(1);
- }
-
-
- if(written != dev->nDataBytesPerChunk) return YAFFS_FAIL;
- }
- // yflash2_MaybePowerFail(chunkInNAND,1);
-
- if(tags)
- {
- pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE + PAGE_DATA_SIZE ;
- h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
-
- lseek(h,pos,SEEK_SET);
-
- if( 0 && dev->param.isYaffs2)
- {
-
- written = write(h,tags,sizeof(yaffs_ExtendedTags));
- if(written != sizeof(yaffs_ExtendedTags)) return YAFFS_FAIL;
- }
- else
- {
- yaffs_PackedTags2 pt;
- yaffs_PackTags2(&pt,tags, !dev->param.noTagsECC);
- __u8 * ptab = (__u8 *)&pt;
-
- nRead = read(h,localBuffer,sizeof(pt));
- for(i = error = 0; REPORT_ERROR && i < sizeof(pt) && !error; i++){
- if(localBuffer[i] != 0xFF){
- printf("nand simulation: chunk %d oob byte %d was %0x2\n",
- chunkInNAND,i,localBuffer[i]);
- error = 1;
- }
- }
-
- for(i = 0; i < sizeof(pt); i++)
- localBuffer[i] &= ptab[i];
-
- n_partials = rand()% sizeof(pt);
-
- for(i = 0; i < n_partials; i++){
- bpos = rand() % sizeof(pt);
-
- localBuffer[bpos] |= (1 << (rand() & 7));
- }
-
- if(REPORT_ERROR && memcmp(localBuffer,&pt,sizeof(pt)))
- printf("nand sim: tags corruption\n");
-
- lseek(h,pos,SEEK_SET);
-
- written = write(h,localBuffer,sizeof(pt));
- if(written != sizeof(pt)) return YAFFS_FAIL;
- }
- }
-
- //yflash2_MaybePowerFail(chunkInNAND,2);
-
- /* Next do the whole write */
- if(data)
- {
- pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
- h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
-
-
- memset(localBuffer,0xFF, PAGE_SIZE);
- for(i = 0; i < dev->nDataBytesPerChunk; i++){
- localBuffer[i] &= data[i];
- }
-
- if(REPORT_ERROR && memcmp(localBuffer,data,dev->nDataBytesPerChunk))
- printf("nand simulator: data does not match\n");
-
- lseek(h,pos,SEEK_SET);
- written = write(h,localBuffer,dev->nDataBytesPerChunk);
-
- if(yaffs_testPartialWrite){
- close(h);
- exit(1);
- }
-
-
- if(written != dev->nDataBytesPerChunk) return YAFFS_FAIL;
- }
-
- if(tags)
- {
- pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE + PAGE_DATA_SIZE ;
- h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
-
- lseek(h,pos,SEEK_SET);
-
- if( 0 && dev->param.isYaffs2)
- {
-
- written = write(h,tags,sizeof(yaffs_ExtendedTags));
- if(written != sizeof(yaffs_ExtendedTags)) return YAFFS_FAIL;
- }
- else
- {
- yaffs_PackedTags2 pt;
- yaffs_PackTags2(&pt,tags,!dev->param.noTagsECC);
- __u8 * ptab = (__u8 *)&pt;
-
- nRead = read(h,localBuffer,sizeof(pt));
- for(i = error = 0; REPORT_ERROR && i < sizeof(pt) && !error; i++){
- if(localBuffer[i] != 0xFF){
- printf("nand simulation: chunk %d oob byte %d was %0x2\n",
- chunkInNAND,i,localBuffer[i]);
- error = 1;
- }
- }
-
- for(i = 0; i < sizeof(pt); i++)
- localBuffer[i] &= ptab[i];
-
- if(REPORT_ERROR && memcmp(localBuffer,&pt,sizeof(pt)))
- printf("nand sim: tags corruption\n");
-
- lseek(h,pos,SEEK_SET);
-
- written = write(h,localBuffer,sizeof(pt));
- if(written != sizeof(pt)) return YAFFS_FAIL;
- }
- }
-
- yflash2_MaybePowerFail(chunkInNAND,3);
-
- }
- return YAFFS_OK;
-
-}
-
-int yaffs_CheckAllFF(const __u8 *ptr, int n)
-{
- while(n)
- {
- n--;
- if(*ptr!=0xFF) return 0;
- ptr++;
- }
- return 1;
-}
-
-
-static int fail300 = 1;
-static int fail320 = 1;
-
-static int failRead10 = 2;
-
-int yflash2_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags)
-{
- int nread;
- int pos;
- int h;
- int localData = 0;
- int retval = YAFFS_OK;
- int nRead;
-
- T(YAFFS_TRACE_MTD,(TSTR("read chunk %d data %x tags %x" TENDSTR),chunkInNAND,(unsigned)data, (unsigned)tags));
-
- CheckInit();
-
-
-
-
- if(dev->param.inbandTags){
- /* Got to suck the tags out of the data area */
- if(!data) {
- localData=1;
- data = yaffs_GetTempBuffer(dev,__LINE__);
- }
-
-
- yaffs_PackedTags2TagsPart * pt2tp;
- pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
-
-
- pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
- h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
-
- lseek(h,pos,SEEK_SET);
-
- nRead = read(h, data,dev->param.totalBytesPerChunk);
-
- yaffs_UnpackTags2TagsPart(tags,pt2tp);
-
- if(nread != dev->param.totalBytesPerChunk)
- retval = YAFFS_FAIL;
-
- if(localData)
- yaffs_ReleaseTempBuffer(dev,data,__LINE__);
-
-
-
- }
-
- else {
-
- if(data)
- {
-
- pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
- h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
- lseek(h,pos,SEEK_SET);
- nread = read(h,data,dev->nDataBytesPerChunk);
-
-
- if(nread != dev->nDataBytesPerChunk)
- retval = YAFFS_FAIL;
- }
-
- if(tags)
- {
- pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE + PAGE_DATA_SIZE;
- h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
- lseek(h,pos,SEEK_SET);
-
- if(0 && dev->param.isYaffs2)
- {
- nread= read(h,tags,sizeof(yaffs_ExtendedTags));
- if(nread != sizeof(yaffs_ExtendedTags))
- retval = YAFFS_FAIL;
- if(yaffs_CheckAllFF((__u8 *)tags,sizeof(yaffs_ExtendedTags)))
- {
- yaffs_InitialiseTags(tags);
- }
- else
- {
- tags->chunkUsed = 1;
- }
- }
- else
- {
- yaffs_PackedTags2 pt;
- nread= read(h,&pt,sizeof(pt));
- yaffs_UnpackTags2(tags,&pt, !dev->param.noTagsECC);
-#ifdef SIMULATE_FAILURES
- if((chunkInNAND >> 6) == 100) {
- if(fail300 && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR){
- tags->eccResult = YAFFS_ECC_RESULT_FIXED;
- fail300 = 0;
- }
- }
-
- if((chunkInNAND >> 6) == 110) {
- if(fail320 && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR){
- tags->eccResult = YAFFS_ECC_RESULT_FIXED;
- fail320 = 0;
- }
- }
-#endif
- if(failRead10>0 && chunkInNAND == 10){
- failRead10--;
- nread = 0;
- }
-
- if(nread != sizeof(pt))
- retval = YAFFS_FAIL;
- }
- }
- }
-
-
-
- return retval;
-
-}
-
-
-int yflash2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
-{
- int written;
- int h;
-
- yaffs_PackedTags2 pt;
-
- CheckInit();
-
- memset(&pt,0,sizeof(pt));
- h = filedisk.handle[(blockNo / ( BLOCKS_PER_HANDLE))];
- lseek(h,((blockNo % BLOCKS_PER_HANDLE) * dev->param.nChunksPerBlock) * PAGE_SIZE + PAGE_DATA_SIZE,SEEK_SET);
- written = write(h,&pt,sizeof(pt));
-
- if(written != sizeof(pt)) return YAFFS_FAIL;
-
-
- return YAFFS_OK;
-
-}
-
-int yflash2_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
-{
-
- int i;
- int h;
-
- CheckInit();
-
- printf("erase block %d\n",blockNumber);
-
- if(blockNumber == 320)
- fail320 = 1;
-
- if(blockNumber < 0 || blockNumber >= filedisk.nBlocks)
- {
- T(YAFFS_TRACE_ALWAYS,("Attempt to erase non-existant block %d\n",blockNumber));
- return YAFFS_FAIL;
- }
- else
- {
-
- __u8 pg[PAGE_SIZE];
- int syz = PAGE_SIZE;
- int pos;
-
- memset(pg,0xff,syz);
-
-
- h = filedisk.handle[(blockNumber / ( BLOCKS_PER_HANDLE))];
- lseek(h,((blockNumber % BLOCKS_PER_HANDLE) * dev->param.nChunksPerBlock) * PAGE_SIZE,SEEK_SET);
- for(i = 0; i < dev->param.nChunksPerBlock; i++)
- {
- write(h,pg,PAGE_SIZE);
- }
- pos = lseek(h, 0,SEEK_CUR);
-
- return YAFFS_OK;
- }
-
-}
-
-int yflash2_InitialiseNAND(yaffs_Device *dev)
-{
- CheckInit();
-
- return YAFFS_OK;
-}
-
-
-
-
-int yflash2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, __u32 *sequenceNumber)
-{
- yaffs_ExtendedTags tags;
- int chunkNo;
-
- *sequenceNumber = 0;
-
- chunkNo = blockNo * dev->param.nChunksPerBlock;
-
- yflash2_ReadChunkWithTagsFromNAND(dev,chunkNo,NULL,&tags);
- if(tags.blockBad)
- {
- *state = YAFFS_BLOCK_STATE_DEAD;
- }
- else if(!tags.chunkUsed)
- {
- *state = YAFFS_BLOCK_STATE_EMPTY;
- }
- else if(tags.chunkUsed)
- {
- *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
- *sequenceNumber = tags.sequenceNumber;
- }
- return YAFFS_OK;
-}
-
projects / yaffs2.git / blobdiff