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windows-nt/Source/XPSP1/NT/drivers/storage/tffsport/nftllite.c
CryptoAlgo Inc b3cac27891 Add source files
2020-09-26 16:20:57 +08:00

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/*
* $Log: V:/Flite/archives/TrueFFS5/Src/NFTLLITE.C_V $
*
* Rev 1.27 Apr 15 2002 07:38:22 oris
* Added support for RAM based MTD power failure tests.
* Remove cache allocation checks - They are not needed since the cache routine itself check for proper allocation.
* Improved power failure resistant:
* - Added support for VERIFY_ERASED_SECTOR compilation flag - make sure a sector is free before writing it.
* - writeAndCheck() -
* 1) Added an option to verify that the sector is erased before writing.
* It subject to the FL_UPS/FL_OFF/FL_ON modes of the flVerifyWrite environment variable.
* 2) Added support for partition > 0.
* - getUnitData() - Bug fix - in case of invalid replacement unit if we are mounting or formatting store physical unit number in
* invalidReplacement field of the Anand record otherwise mark head of chain as frozen and not the unit itself.
* - Bug fix - Added logic to find end of endless loops - findEndOfEndlessLoop()
* - virtual2Physical() - Added call to findEndOfEndlessLoop() if needed and return address of next free sector (used verifySector()).
* - initNFTL() - Added initialization of TL verifyBuffer buffer and invalidReplacement fields.
* - Separated the search for a free unit in physical table from allocateUnit() into dedicated routine findFreeUnit().
* - foldUnit()
* 1) Added support for partition > 0.
* 2) Prevent a recursive call to foldUnit by changing allocateUnit() with findFreeUnit().
* 3) Added logic for endless loops.
* 4) Added check that last sector of chain can be used.
* - foldBestChain() - revised the entire routine
* 1) If folding not in place was forced free all frozen units.
* 2) Validate that a unit was actually freed.
* - mountUnit() -
* 1) In case of bad virtual unit number format the unit . An invalid virtual unit might be a result of power failures.
* - allocateAndWrite() - Bug fix - sector count might be incorrectly updated in case folding found a sector with bad EDC.
* - mountNFTL -
* 1) Moved badFormat initialization to the end of the routine so that getUnitData() might know if it was called by mount routine.
* 2) Made sure there is at least 1 free unit.
* 3) Fold chains with invalid pointer in their end of chain - caused by power failures.
* - Added MAKE_SURE_IGNORE_HAS_BAD_EDC compilation flag - make sure that the sector is really marked
* - verifySector() - was completely revised.
*
* Rev 1.26 Feb 19 2002 21:00:56 oris
* Compilation errors - NO_READ_BBT_CODE
* Removed warnings.
* Replaced TL_LEAVE_BINARY_AREA with FL_LEAVE_BINARY_AREA
*
* Rev 1.25 Jan 29 2002 20:09:58 oris
* Bug fix - if an invalid sector flag is found in getSectorFlags routine and read operation failed, SECTOR_IGNORED should have been returned.
*
* Rev 1.24 Jan 23 2002 23:33:56 oris
* Improved markAsIgnored routine.
* Changed DFORMAT_PRINT syntax.
*
* Rev 1.23 Jan 20 2002 20:29:26 oris
* Remove warnings
* Bug fix - Missing cache buffers allocation check in formatUnit.
*
* Rev 1.22 Jan 17 2002 23:04:22 oris
* Added onesCount routine - number of bits in a byte.
* Improved FL_READ_ONLY compilation mode.
* Flash field of the TL was changed to a pointer.
* Added check verifyVolume routine to issue a longer, but safer mount.
* Moved RAM tables to far heap to allow BIOS driver to allocate far memory heap even when compiled as tiny model:
* - InitTables : allocation was change from FL_MALLOC to FL_FAR_MALLOC.
* - mountUnit : changes pointer to virtual table to be FAR.
* - mountNFTL :
* - changes pointer to virtual table to be FAR.
* - allocation of cache tables was change from FL_MALLOC to FL_FAR_MALLOC.
* - dismount : use FL_FAR_FREE instead of FL_FREE
* formatUnit routine improved re-initialization of sector cache.
* Changed flPolicy to be socket specific.
* Added \r to all DEBUG_PRINT.
* writeSector routine if this sector is the cached sector then force re-mapping.
* Bug fix in formatNFTL :
* - Add binary length to percentage of bad blocks.
* - Report error if there is not enough good blocks.
* - Report error if block 0 is bad.
* New power failures protection algorithm
* - setUnitData : When verify write is on , no need to reread unit data
* - getSectorFlags : if flags is not valid (including SECTOR_IGNORE) check EDC and bit distance instead of simple or.
* - virtual2Physical : Added endAddress parameter to allow retrieval of not the newest sector.
* - writeAndCheck :
* - Toggle socket verify write mode according to global verify write mode.
* - Moved the marking of the sector as bad into a dedicated routine (markAsIgnored)
* - initNftl :
* - Init FLFlash pointer (and not structure)
* - Init socket number of the TL
* - Init verifiedSectorNo for FL_OFF verify write mode
* - swapUnits : Catch failed folding operation
* - Moved copySector routine into foldUnit.
* - Changed chain bound for all chains "for loops" to the constant DOUBLE_MAX_UNIT_CHAIN (support MAX_UNIT_CHAIN of 1 in case of folding not in place).
* - foldUnit :
* - When verify write is set to FL_OFF call verifySectors routine to gradually scan the entire media
* - Force re-mapping of cached sector
* - Add force folding parameter
* - Toggle socket verify write mode according to verify write mode and currently scanned sector number
* - Verify copied sector EDC even for last sector of chain (no need to copy it) and if bad freeze chain and return flCanNotFold (unless forced folding is issued)
* - In case of bad EDC use older sector.
* - In case write operation failed (could be partially written sector that was discovered by verify write mode) freeze chain and return flCanNotFold (unless forced folding is issued)
* - foldBestChain : if folding of the chosen unit failed, freeze and try another unit MAX_FOLDING_TRIES times.
* - allocateUnit : free media space even if there is a free unit available
* - mapSector : if sector has bad EDC read older sector until no sectors were found or chain bound has been reached
* - allocateAndWriteSector :
* - Catch failed folding operation.
* - Set curSectorWrite to current sector so that writeAndCheck routine will be able to decide whether to verify this sector or not while in FL_OFF verify mode.
* - deleteSectors : Catch failed folding operation.
* - mountNFTL :
* - Set default verify write policy to FL_UPS.
* - Set checkVolme routine pointer.
* - Added checkVolume / checkFolding / verifySectors and markAsIgnored routines.
*
* Rev 1.21 Nov 21 2001 11:38:04 oris
* Changed FL_MARK_DELETE to FL_ON.
*
* Rev 1.20 15 Nov 2001 16:28:24 dimitrys
* Fix Big BDK partition with Bad Units problem in formatNFTL()
*
* Rev 1.19 Sep 25 2001 15:39:58 oris
* Removed warnings.
*
* Rev 1.18 Jul 29 2001 18:48:50 oris
* Bug fix - unit 0 of floors > 0 were not marked as bad blocks therefore future write operation might force the device into external eprom mode.
*
* Rev 1.17 Jul 15 2001 20:45:26 oris
* Changed DFORMAT_PRINT syntax to be similar to DEBUG_PRINT.
*
* Rev 1.16 Jul 13 2001 01:08:38 oris
* Removed EDC for media header.
* Added dformat debug print for virgin media.
*
* Rev 1.15 Jun 17 2001 16:39:12 oris
* Improved documentation and remove warnings.
*
* Rev 1.14 Jun 17 2001 08:17:34 oris
* Removed warnings.
* Changed erase routine to formatUnit.
* Bug fix - original meida header was not written.
* Added NO_READ_BBT_CODE compilation flag to reduce code size.
*
* Rev 1.13 May 29 2001 23:12:28 oris
* Added EDC check of the media header both in the mount and format routines.
*
* Rev 1.12 May 16 2001 21:21:26 oris
* Added EDC check for media header.
* Added the FL_ prefix to the following defines: ON , OFF, MALLOC and FREE.
* Changed wear level counter from 0xFF to 0xFFF0
*
* Rev 1.11 May 06 2001 22:42:26 oris
* Removed warnings.
*
* Rev 1.10 May 01 2001 16:33:46 oris
* Bug fix - readBBT routine returned used blocks as bad.
*
* Rev 1.9 Apr 30 2001 18:03:30 oris
* Bug fix - marking binary partition blocks of devices that use artifitial large erase blocks (units).
* Added support for the flMarkDeleteOnFlash environment variable.
*
* Rev 1.8 Apr 24 2001 17:10:14 oris
* Bug fix - readBBT routine missing casting.
*
* Rev 1.7 Apr 16 2001 13:56:46 oris
* Removed warrnings.
*
* Rev 1.6 Apr 09 2001 15:04:42 oris
* End with an empty line.
*
* Rev 1.5 Apr 01 2001 07:55:42 oris
* copywrite notice.
* changed SEPERATED to SEPARATED.
* Changed SEPARATED_CASCADED ifdef to a runtime if.
*
* Rev 1.3 Feb 14 2001 02:03:38 oris
* Changed readBBT to return media size.
*
* Rev 1.2 Feb 12 2001 12:10:56 oris
* Moved SEPARATED cascaded to include more uneeded code.
* Rewritten readBBT to support far pointers.
*
* Rev 1.1 Feb 07 2001 17:46:26 oris
* Added SEPARATED_CASCADED compilation flag
*
* Rev 1.0 Feb 05 2001 12:24:18 oris
* Initial revision.
*
*/
/***********************************************************************************/
/* M-Systems Confidential */
/* Copyright (C) M-Systems Flash Disk Pioneers Ltd. 1995-2001 */
/* All Rights Reserved */
/***********************************************************************************/
/* NOTICE OF M-SYSTEMS OEM */
/* SOFTWARE LICENSE AGREEMENT */
/* */
/* THE USE OF THIS SOFTWARE IS GOVERNED BY A SEPARATE LICENSE */
/* AGREEMENT BETWEEN THE OEM AND M-SYSTEMS. REFER TO THAT AGREEMENT */
/* FOR THE SPECIFIC TERMS AND CONDITIONS OF USE, */
/* OR CONTACT M-SYSTEMS FOR LICENSE ASSISTANCE: */
/* E-MAIL = info@m-sys.com */
/***********************************************************************************/
#include "nftllite.h"
#include "nanddefs.h"
#ifndef FL_READ_ONLY
#if (defined(VERIFY_WRITE) || defined (VERIFY_VOLUME) || defined(VERIFY_ERASED_SECTOR))
static FLStatus checkVolume(Anand vol);
static FLStatus verifySectors(Anand vol, dword sectorCount);
#endif /* VERIFY_WRITE || VERIFY_VOLUME || VERIFY_ERASED_SECTOR */
static void markAsIgnored(Anand vol,CardAddress addr);
static FLStatus foldBestChain(Anand vol, ANANDUnitNo *unitNo);
static FLStatus foldUnit(Anand vol, ANANDUnitNo virtualUnitNo, FLBoolean);
static FLStatus checkFolding(Anand vol, ANANDUnitNo virtualUnitNo);
static FLStatus allocateUnit(Anand vol, ANANDUnitNo *);
#endif /* FL_READ_ONLY */
static Anand vols[VOLUMES];
#ifdef NFTL_CACHE
/* translation table for Sector Flags cache */
static unsigned char scacheTable[4] = { SECTOR_DELETED, /* 0 */
SECTOR_IGNORE, /* 1 */
SECTOR_USED, /* 2 */
SECTOR_FREE }; /* 3 */
#endif /* NFTL_CACHE */
#ifdef FORMAT_VOLUME
byte ff[ANAND_SPARE_SIZE];
#endif /* FORMAT_VOLUME */
/*------------------------------------------------------*/
/* o n e s C o u n t */
/* */
/* counts number of bits that valued 1 in a given byte */
/*------------------------------------------------------*/
static byte onesCount(byte flag)
{
byte counter;
for (counter = 0; flag; flag >>= 1)
if (flag & 1)
counter++;
return counter;
}
/*----------------------------------------------------------------------*/
/* u n i t B a s e A d d r e s s */
/* */
/* Returns the physical address of a unit. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical unit number */
/* */
/* Returns: */
/* physical address of unitNo */
/*----------------------------------------------------------------------*/
static CardAddress unitBaseAddress(Anand vol, ANANDUnitNo unitNo)
{
return (CardAddress)unitNo << vol.unitSizeBits;
}
/*----------------------------------------------------------------------*/
/* g e t U n i t D a t a */
/* */
/* Get virtual unit No. and replacement unit no. of a unit. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical unit number */
/* virtualUnitNo : Receives the virtual unit no. */
/* replacementUnitNo : Receives the replacement unit no. */
/* */
/*----------------------------------------------------------------------*/
static void getUnitData(Anand vol,
ANANDUnitNo unitNo,
ANANDUnitNo *virtualUnitNo,
ANANDUnitNo *replacementUnitNo)
{
ANANDUnitHeader unitData;
#ifdef NFTL_CACHE
/* check ANANDUnitHeader cache first */
if (vol.ucache != NULL) {
/* on cache miss read ANANDUnitHeader from flash and re-fill cache */
if((vol.ucache[unitNo].virtualUnitNo == 0xDEAD) &&
(vol.ucache[unitNo].replacementUnitNo == 0xDEAD)) {
vol.flash->read(vol.flash,
unitBaseAddress(&vol,unitNo) + UNIT_DATA_OFFSET,
&unitData,
sizeof(ANANDUnitHeader),
EXTRA);
vol.ucache[unitNo].virtualUnitNo =
LE2(unitData.virtualUnitNo) | LE2(unitData.spareVirtualUnitNo);
vol.ucache[unitNo].replacementUnitNo =
LE2(unitData.replacementUnitNo) | LE2(unitData.spareReplacementUnitNo);
}
*virtualUnitNo = vol.ucache[unitNo].virtualUnitNo;
*replacementUnitNo = vol.ucache[unitNo].replacementUnitNo;
}
else
#endif /* NFTL_CACHE */
{ /* no ANANDUnitHeader cache */
vol.flash->read(vol.flash,
unitBaseAddress(&vol,unitNo) + UNIT_DATA_OFFSET,
&unitData,
sizeof(ANANDUnitHeader),
EXTRA);
/* Mask out any 1 -> 0 bit faults by or'ing with spare data */
*virtualUnitNo = LE2(unitData.virtualUnitNo) |
LE2(unitData.spareVirtualUnitNo);
*replacementUnitNo = LE2(unitData.replacementUnitNo) |
LE2(unitData.spareReplacementUnitNo);
}
if( !isLegalUnit(*replacementUnitNo) ) {
vol.invalidReplacement = unitNo;
if(vol.badFormat == FALSE) /* Not called by mount operation */
{
ANANDUnitNo firstUnits = vol.virtualUnits[*virtualUnitNo];
if(firstUnits != ANAND_NO_UNIT)
setUnavail(firstUnits & (~ANAND_REPLACING_UNIT)); /* freeze unit chain */
}
*replacementUnitNo = ANAND_NO_UNIT;
}
}
#ifndef FL_READ_ONLY
/*----------------------------------------------------------------------*/
/* s e t U n i t D a t a */
/* */
/* Set virtual unit No. and replacement unit no. of a unit. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical unit number */
/* virtualUnitNo : Virtual unit no. */
/* replacementUnitNo : Replacement unit no. */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/* */
/*----------------------------------------------------------------------*/
static FLStatus setUnitData(Anand vol,
ANANDUnitNo unitNo,
ANANDUnitNo virtualUnitNo,
ANANDUnitNo replacementUnitNo)
{
ANANDUnitHeader unitData;
ANANDUnitNo newVirtualUnitNo, newReplacementUnitNo;
if( replacementUnitNo == unitNo ) /* prevent chain loop */
return flGeneralFailure;
toLE2(unitData.virtualUnitNo,virtualUnitNo);
toLE2(unitData.spareVirtualUnitNo,virtualUnitNo);
toLE2(unitData.replacementUnitNo,replacementUnitNo);
toLE2(unitData.spareReplacementUnitNo,replacementUnitNo);
checkStatus(vol.flash->write(vol.flash,
unitBaseAddress(&vol,unitNo) + UNIT_DATA_OFFSET,
&unitData,
sizeof(ANANDUnitHeader),
EXTRA));
#ifdef VERIFY_WRITE
if (vol.flash->socket->verifyWrite==FL_ON)
{
#ifdef NFTL_CACHE
/* Set new entries for ANANDUnitHeader cache */
if (vol.ucache != NULL) {
vol.ucache[unitNo].virtualUnitNo = virtualUnitNo;
vol.ucache[unitNo].replacementUnitNo = replacementUnitNo;
}
#endif /* NFTL_CACHE */
return flOK;
}
#endif /* VERIFY_WRITE */
#ifdef NFTL_CACHE
/* purge ANANDUnitHeader cache to force re-filling from flash */
if (vol.ucache != NULL) {
vol.ucache[unitNo].virtualUnitNo = 0xDEAD;
vol.ucache[unitNo].replacementUnitNo = 0xDEAD;
}
#endif /* NFTL_CACHE */
/* Verify the new unit data */
getUnitData(&vol,unitNo,&newVirtualUnitNo, &newReplacementUnitNo);
if (virtualUnitNo != newVirtualUnitNo ||
replacementUnitNo != newReplacementUnitNo)
return flWriteFault;
else
return flOK;
}
#endif /* FL_READ_ONLY */
/*----------------------------------------------------------------------*/
/* g e t N e x t U n i t */
/* */
/* Get next unit in chain. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical unit number */
/* virUnitNo : Virtual unit number of the chain. */
/* */
/* Returns: */
/* Physical unit number of the unit following unitNo in the chain. */
/* If such unit do not exist, return ANAND_NO_UNIT. */
/*----------------------------------------------------------------------*/
static ANANDUnitNo getNextUnit(Anand vol, ANANDUnitNo unitNo, ANANDUnitNo virUnitNo)
{
ANANDUnitNo virtualUnitNo, replacementUnitNo;
if (!(vol.physicalUnits[unitNo] & UNIT_REPLACED))
return ANAND_NO_UNIT;
getUnitData(&vol,unitNo,&virtualUnitNo,&replacementUnitNo);
if( virUnitNo != (virtualUnitNo & ~ANAND_REPLACING_UNIT) ) {
unitNo = vol.virtualUnits[virUnitNo];
setUnavail(unitNo); /* freeze unit chain */
return ANAND_NO_UNIT;
}
return replacementUnitNo;
}
#ifdef NFTL_CACHE
/*----------------------------------------------------------------------*/
/* g e t S e c t o r F l a g s F r o m C a c h e */
/* */
/* Get sector flags from Sector Cache. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* address : starting address of the sector */
/* */
/* Returns: */
/* sector flags (SECTOR_USED, SECTOR_DELETED etc.) */
/*----------------------------------------------------------------------*/
static unsigned char getSectorFlagsFromCache(Anand vol, CardAddress address)
{
return scacheTable[(vol.scache[address >> (SECTOR_SIZE_BITS+2)] >>
(((unsigned int)address >> 8) & 0x7)) & 0x3];
}
/*----------------------------------------------------------------------*/
/* s e t S e c t o r F l a g s C a c h e */
/* */
/* Get sector flags from Sector Cache. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* address : starting address of the sector */
/* sectorFlags : one of SECTOR_USED, SECTOR_DELETED etc. */
/* */
/*----------------------------------------------------------------------*/
static void setSectorFlagsCache(Anand vol, CardAddress address,
unsigned char sectorFlags)
{
register unsigned char tmp, val;
if (vol.scache == NULL)
return;
tmp = vol.scache[address >> (SECTOR_SIZE_BITS+2)];
switch(sectorFlags) {
case SECTOR_USED: val = S_CACHE_SECTOR_USED; break;
case SECTOR_FREE: val = S_CACHE_SECTOR_FREE; break;
case SECTOR_DELETED: val = S_CACHE_SECTOR_DELETED; break;
default:/* SECTOR_IGNORE */val = S_CACHE_SECTOR_IGNORE; break;
}
switch (((unsigned int)address >> 8) & 0x7) {
case 0: tmp = (tmp & 0xfc) | (val ); break; /* update bits 0..1 */
case 2: tmp = (tmp & 0xf3) | (val << 2); break; /* bits 2..3 */
case 4: tmp = (tmp & 0xcf) | (val << 4); break; /* bits 4..5 */
case 6: tmp = (tmp & 0x3f) | (val << 6); break; /* bits 6..7 */
}
vol.scache[address >> (SECTOR_SIZE_BITS+2)] = tmp;
}
#endif /* NFTL_CACHE */
/*----------------------------------------------------------------------*/
/* g e t S e c t o r F l a g s */
/* */
/* Get sector status. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* sectorAddress : Physical address of the sector */
/* */
/* Returns: */
/* Return the OR of the two bytes in the sector status area (the */
/* bytes should contain the same data). */
/*----------------------------------------------------------------------*/
static unsigned char getSectorFlags(Anand vol, CardAddress sectorAddress)
{
byte flags[2];
byte blockFlag = SECTOR_IGNORE;
byte index,tmpSector;
FLStatus status;
#ifdef NFTL_CACHE
if (vol.scache != NULL) { /* check for Sector Flags cache hit */
blockFlag = getSectorFlagsFromCache(&vol, sectorAddress);
if (blockFlag != SECTOR_IGNORE)
return blockFlag;
}
#endif /* NFTL_CACHE */
vol.flash->read(vol.flash, sectorAddress + SECTOR_DATA_OFFSET,
flags, sizeof flags, EXTRA);
if((flags[0] == flags[1]) && (isValidSectorFlag(flags[0])))
{
blockFlag = flags[0];
}
else /* Sector flags that were read are not legal */
{
/* Force remapping of internal catched sector */
vol.flash->socket->remapped = TRUE;
/* Check for ignored sector using the EDC */
status = vol.flash->read(vol.flash, sectorAddress,
nftlBuffer, SECTOR_SIZE, EDC);
if(status == flOK)
{
/* Check if distance is less then 2 bits failure since */
/* 2 bits failure can be either delete or used */
for (index=0 , tmpSector = (byte)SECTOR_USED ; index < 2 ;
index++ , tmpSector = (byte)SECTOR_DELETED)
{
if (distanceOf(flags[0], tmpSector) +
distanceOf(flags[1], tmpSector) <= 2)
{
blockFlag = tmpSector;
break;
}
}
if(index>=2)
return SECTOR_IGNORE;
}
else
{
return SECTOR_IGNORE;
}
}
#ifdef NFTL_CACHE
/* update Sector Flags cache */
setSectorFlagsCache(&vol, sectorAddress, blockFlag);
#endif /* NFTL_CACHE */
return blockFlag;
}
/*----------------------------------------------------------------------*/
/* f i n d E n d O f E n d l e s s C h a i n */
/* */
/* Find end of endless chain - last unit of unit chain that points to */
/* itself. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* virUnitNo : Virtual unit number */
/* */
/* Returns: */
/* Physical unit number of oldest unit of the chain */
/*----------------------------------------------------------------------*/
static ANANDUnitNo findEndOfEndlessChain(Anand vol, ANANDUnitNo virUnitNo)
{
ANANDUnitNo chainsUnit[DOUBLE_MAX_UNIT_CHAIN/2+2];
ANANDUnitNo unitNo;
int i;
int chainBound;
for (unitNo = vol.virtualUnits[virUnitNo] , chainBound = 0 ;
chainBound < MAX_UNIT_CHAIN ;
unitNo = getNextUnit(&vol,unitNo,virUnitNo) , chainBound++)
{
chainsUnit[chainBound] = unitNo; /* Save location of current unit */
for(i = 0 ; i < chainBound ; i++) /* Check if already been to this unit */
{
if(chainsUnit[chainBound] == unitNo) /* Bad next unit number pointer */
break;
}
}
return chainsUnit[chainBound-1];
}
/*----------------------------------------------------------------------*/
/* v i r t u a l 2 P h y s i c a l */
/* */
/* Translate virtual sector number to physical address. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* sectorNo : Virtual sector number */
/* endAddress : End address for sector search. NULL for no end */
/* */
/* Returns: */
/* endAddress : Next free sector address */
/* physical address of sectorNo */
/*----------------------------------------------------------------------*/
static CardAddress virtual2Physical(Anand vol, SectorNo sectorNo , CardAddress* endAddress)
{
unsigned unitOffset = (unsigned)((sectorNo % vol.sectorsPerUnit) << SECTOR_SIZE_BITS);
CardAddress prevSectorAddress = ANAND_UNASSIGNED_ADDRESS;
CardAddress sectorAddress;
CardAddress *freeSectorAddressPtr;
ANANDUnitNo unitNo, virUnitNo;
ANANDUnitNo chainBound = 0;
ANANDUnitNo endUnit;
byte sectorFlags;
FLBoolean badPointerFound = FALSE;
/* Set end unit and nextFreeSectorAddress */
if(endAddress == NULL)
{
endUnit = ANAND_NO_UNIT;
}
else
{
endUnit = (ANANDUnitNo)(*endAddress>>vol.unitSizeBits);
*endAddress = ANAND_UNASSIGNED_ADDRESS;
}
/* follow the chain */
virUnitNo = (ANANDUnitNo)(sectorNo / vol.sectorsPerUnit);
for (unitNo = vol.virtualUnits[virUnitNo];
( (unitNo != endUnit) && (chainBound < DOUBLE_MAX_UNIT_CHAIN) );
unitNo = getNextUnit(&vol,unitNo,virUnitNo))
{
sectorAddress = unitBaseAddress(&vol,unitNo) + unitOffset;
sectorFlags = getSectorFlags(&vol,sectorAddress);
if (sectorFlags == SECTOR_FREE)
{
if(endAddress != NULL)
*endAddress = sectorAddress;
break;
}
if (sectorFlags != SECTOR_IGNORE)
prevSectorAddress = sectorFlags != SECTOR_DELETED ? sectorAddress :
ANAND_UNASSIGNED_ADDRESS;
chainBound++;
}
if(chainBound < DOUBLE_MAX_UNIT_CHAIN)
return prevSectorAddress;
/* Infint loop caused by power failure */
if(endAddress == NULL)
{
freeSectorAddressPtr = &sectorAddress;
}
else
{
freeSectorAddressPtr = endAddress;
}
*freeSectorAddressPtr = unitOffset +
unitBaseAddress(&vol,
findEndOfEndlessChain(&vol,virUnitNo));
return virtual2Physical(&vol, sectorNo , freeSectorAddressPtr);
}
/*----------------------------------------------------------------------*/
/* g e t F o l d M a r k */
/* */
/* Get the fold mark a unit. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical unit number */
/* */
/* Returns: */
/* Return the OR of the two words in the fold mark area (the words */
/* should be identical) */
/*----------------------------------------------------------------------*/
static unsigned short getFoldMark(Anand vol, ANANDUnitNo unitNo)
{
unsigned short foldMark[2];
vol.flash->read(vol.flash,
unitBaseAddress(&vol,unitNo) + FOLD_MARK_OFFSET,
foldMark, sizeof foldMark,
EXTRA);
return foldMark[0] | foldMark[1];
}
/*----------------------------------------------------------------------*/
/* g e t U n i t T a i l e r */
/* */
/* Get the erase record of a unit. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical unit number */
/* eraseMark : Receives the erase mark of the unit */
/* eraseCount : Receives the erase count of the unit */
/* */
/*----------------------------------------------------------------------*/
static void getUnitTailer(Anand vol,
ANANDUnitNo unitNo,
unsigned short *eraseMark,
unsigned long *eraseCount)
{
UnitTailer unitTailer;
vol.flash->read(vol.flash,
unitBaseAddress(&vol,unitNo) + UNIT_TAILER_OFFSET,
&unitTailer,
sizeof(UnitTailer),
EXTRA);
/* Mask out any 1 -> 0 bit faults by or'ing with spare data */
*eraseMark = LE2(unitTailer.eraseMark) | LE2(unitTailer.eraseMark1);
*eraseCount = LE4(unitTailer.eraseCount);
}
/*----------------------------------------------------------------------*/
/* s e t U n i t T a i l e r */
/* */
/* Set the erase record of a unit. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical unit number */
/* eraseMark : Erase mark to set */
/* eraseCount : Erase count to set */
/* */
/*----------------------------------------------------------------------*/
static FLStatus setUnitTailer(Anand vol,
ANANDUnitNo unitNo,
unsigned short eraseMark,
unsigned long eraseCount)
{
UnitTailer unitTailer;
toLE2(unitTailer.eraseMark,eraseMark);
toLE2(unitTailer.eraseMark1,eraseMark);
toLE4(unitTailer.eraseCount,eraseCount);
return vol.flash->write(vol.flash,
unitBaseAddress(&vol,unitNo) + UNIT_TAILER_OFFSET,
&unitTailer,
sizeof(UnitTailer),
EXTRA);
}
/*----------------------------------------------------------------------*/
/* i n i t N F T L */
/* */
/* Initializes essential volume data as a preparation for mount or */
/* format. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* flash : Flash media mounted on this socket */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus initNFTL(Anand vol, FLFlash *flash)
{
dword size = 1;
if (flash == NULL || !(flash->flags & NFTL_ENABLED)) {
DEBUG_PRINT(("Debug: media is not fit for NFTL format.\r\n"));
return flUnknownMedia;
}
vol.flash = flash;
#ifdef NT5PORT
vol.socketNo = (byte)(flSocketNoOf(vol.flash->socket));
#else
vol.socketNo = flSocketNoOf(vol.flash->socket);
#endif NT5PORT
vol.physicalUnits = NULL;
vol.virtualUnits = NULL;
#ifdef NFTL_CACHE
vol.ucache = NULL;
vol.scache = NULL;
#endif
for (vol.erasableBlockSizeBits = 0; size < vol.flash->erasableBlockSize;
vol.erasableBlockSizeBits++, size <<= 1);
vol.unitSizeBits = vol.erasableBlockSizeBits;
vol.noOfUnits = (unsigned short)((vol.flash->noOfChips * vol.flash->chipSize) >> vol.unitSizeBits);
/* Adjust unit size so header unit fits in one unit */
while (vol.noOfUnits * sizeof(ANANDPhysUnit) + SECTOR_SIZE > (1UL << vol.unitSizeBits)) {
vol.unitSizeBits++;
vol.noOfUnits >>= 1;
}
/* Bound number of units to find room in 64 Kbytes Segment */
if( (vol.noOfUnits >= MAX_UNIT_NUM) && (vol.unitSizeBits < MAX_UNIT_SIZE_BITS) ) {
vol.unitSizeBits++;
vol.noOfUnits >>= 1;
}
vol.badFormat = TRUE; /* until mount completes*/
vol.mappedSectorNo = UNASSIGNED_SECTOR;
vol.countsValid = 0; /* No units have a valid count yet */
/*get pointer to buffer (we assume SINGLE_BUFFER is not defined) */
vol.buffer = flBufferOf(flSocketNoOf(vol.flash->socket));
#ifdef VERIFY_ERASED_SECTOR
vol.verifyBuffer = (dword *)flReadBackBufferOf(flSocketNoOf(flash->socket));
#endif /* VERIFY_ERASED_SECTOR */
#if (defined(VERIFY_WRITE) || defined(VERIFY_VOLUME) || defined(VERIFY_ERASED_SECTOR))
vol.verifiedSectorNo = 0; /* Largest sector verified so far */
#endif /* VERIFY_WRITE || VERIFY_VOLUME || VERIFY_ERASED_SECTOR */
vol.invalidReplacement = ANAND_NO_UNIT; /* a unit with bad RUN */
return flOK;
}
/*----------------------------------------------------------------------*/
/* i n i t T a b l e s */
/* */
/* Allocates and initializes the dynamic volume table, including the */
/* unit tables and secondary virtual map. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus initTables(Anand vol)
{
/* Allocate the conversion tables */
#ifdef FL_MALLOC
vol.physicalUnits = (ANANDPhysUnit FAR1*) FL_FAR_MALLOC (vol.noOfUnits * sizeof(ANANDPhysUnit));
vol.virtualUnits = (ANANDUnitNo FAR1*) FL_FAR_MALLOC (vol.noOfVirtualUnits * sizeof(ANANDUnitNo));
if (vol.physicalUnits == NULL ||
vol.virtualUnits == NULL) {
DEBUG_PRINT(("Debug: failed allocating conversion tables for NFTL.\r\n"));
return flNotEnoughMemory;
}
#else
char *heapPtr;
heapPtr = vol.heap;
vol.physicalUnits = (ANANDPhysUnit *) heapPtr;
heapPtr += vol.noOfUnits * sizeof(ANANDPhysUnit);
vol.virtualUnits = (ANANDUnitNo *) heapPtr;
heapPtr += vol.noOfVirtualUnits * sizeof(ANANDUnitNo);
if (heapPtr > vol.heap + sizeof vol.heap) {
DEBUG_PRINT(("Debug: not enough memory for NFTL conversion tables.\r\n"));
return flNotEnoughMemory;
}
#endif
return flOK;
}
/*----------------------------------------------------------------------*/
/* m a r k U n i t B a d */
/* */
/* Mark a unit as bad in the conversion table and the bad units table. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical number of bad unit */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus markUnitBad(Anand vol, ANANDUnitNo unitNo)
{
unsigned short eraseMark;
unsigned long eraseCount;
vol.physicalUnits[unitNo] = UNIT_BAD_MOUNT;
getUnitTailer(&vol,unitNo,&eraseMark,&eraseCount);
return setUnitTailer(&vol,unitNo,0,eraseCount);
}
/*----------------------------------------------------------------------*/
/* f o r m a t U n i t */
/* */
/* Format one unit. Erase the unit, and mark the physical units table. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Unit to format */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus formatUnit(Anand vol, ANANDUnitNo unitNo)
{
unsigned short eraseMark;
unsigned long eraseCount;
FLStatus status;
if (!isAvailable(unitNo))
return flWriteFault;
if (vol.physicalUnits[unitNo] == ANAND_UNIT_FREE)
vol.freeUnits--;
setUnavail(unitNo);
getUnitTailer(&vol,unitNo,&eraseMark,&eraseCount);
#ifdef NFTL_CACHE
/* purge ANANDUnitHeader cache to force re-filling from flash */
if (vol.ucache != NULL) {
vol.ucache[unitNo].virtualUnitNo = 0xDEAD;
vol.ucache[unitNo].replacementUnitNo = 0xDEAD;
}
/*
* Purge the Sector Flags cache (set entries for all the unit's
* sectors to SECTOR_FREE).
*/
if (vol.scache != NULL) {
tffsset(&(vol.scache[unitNo << (vol.unitSizeBits - SECTOR_SIZE_BITS-2)]),
S_CACHE_4_SECTORS_FREE, 1 << (vol.unitSizeBits - SECTOR_SIZE_BITS - 2));
}
#endif /* NFTL_CACHE */
status = vol.flash->erase(vol.flash,
(word)(unitNo << (vol.unitSizeBits - vol.erasableBlockSizeBits)),
(word)(1 << (vol.unitSizeBits - vol.erasableBlockSizeBits)));
if (status != flOK) {
markUnitBad(&vol,unitNo); /* make sure unit format is not valid */
return status;
}
vol.eraseSum++;
eraseCount++;
if (eraseCount == 0) /* was hex FF's */
eraseCount++;
checkStatus(setUnitTailer(&vol,unitNo,ERASE_MARK,eraseCount));
vol.physicalUnits[unitNo] = ANAND_UNIT_FREE;
vol.freeUnits++;
return flOK;
}
#ifndef FL_READ_ONLY
/*----------------------------------------------------------------------*/
/* w r i t e A n d C h e c k */
/* */
/* Write one sector. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* address : Physical address of the sector to write to */
/* fromAddress : Buffer of data to write */
/* flags : Write flags (ECC, overwrite etc.) */
/* */
/* Returns: */
/* Status : 0 on success, failed otherwise. */
/*----------------------------------------------------------------------*/
static FLStatus writeAndCheck(Anand vol,
CardAddress address,
void FAR1 *fromAddress,
unsigned flags)
{
FLStatus status;
#ifdef VERIFY_ERASED_SECTOR
register int noOfDword;
int i;
#endif /* VERIFY_ERASED_SECTOR */
/* Toggle verify write flag */
#if (defined(VERIFY_WRITE) || defined(VERIFY_ERASED_SECTOR))
switch (flVerifyWrite[vol.socketNo][vol.flash->socket->curPartition])
{
case FL_OFF:
if (vol.verifiedSectorNo>vol.curSectorWrite)
break;
case FL_ON:
#ifdef VERIFY_WRITE
vol.flash->socket->verifyWrite = FL_ON;
#endif /* VERIFY_WRITE */
#ifdef VERIFY_ERASED_SECTOR
/* Make sure all of the sectors are really free */
checkStatus(vol.flash->read(vol.flash,address,vol.verifyBuffer,SECTOR_SIZE,0));
noOfDword = SECTOR_SIZE/sizeof(dword);
for(i = 0;i<noOfDword;i++) /* Loop over sector data */
{
if(vol.verifyBuffer[i]!=0xffffffffL)
{
markAsIgnored(&vol,address);
DEBUG_PRINT(("writeAndCheck : The sector was not erased and is ignored\r\n"));
return flWriteFault;
}
}
#endif /* VERIFY_ERASED_SECTOR */
default:
break;
}
#endif /* VERIFY_WRITE || VERIFY_ERASED_SECTOR */
/* Write sector */
status = vol.flash->write(vol.flash,address,fromAddress,SECTOR_SIZE,(word)flags);
if (status == flWriteFault) { /* write failed, ignore this sector */
markAsIgnored(&vol,address);
}
#ifdef NFTL_CACHE
else {
setSectorFlagsCache(&vol, address, SECTOR_USED);
}
#endif
#ifdef VERIFY_WRITE
/* Restore verify write mode */
if(flVerifyWrite[flSocketNoOf(vol.flash->socket)][vol.flash->socket->curPartition] != FL_ON)
vol.flash->socket->verifyWrite = FL_OFF;
#endif /* VERIFY_WRITE */
return status;
}
#endif /* FL_READ_ONLY */
/*----------------------------------------------------------------------*/
/* l a s t I n C h a i n */
/* */
/* Find last unit in chain. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Start the search from this unit */
/* */
/* Returns: */
/* Physical unit number of the last unit in chain. */
/*----------------------------------------------------------------------*/
static ANANDUnitNo lastInChain(Anand vol, ANANDUnitNo unitNo)
{
ANANDUnitNo firstVirtualUnitNo, firstReplacementUnitNo;
ANANDUnitNo lastUnit = unitNo, nextUnitNo;
ANANDUnitNo chainBound = 0;
if(unitNo == ANAND_NO_UNIT)
return ANAND_NO_UNIT;
getUnitData(&vol,unitNo,&firstVirtualUnitNo,&firstReplacementUnitNo);
nextUnitNo = firstReplacementUnitNo;
while( (nextUnitNo < vol.noOfUnits) && /* Validate replacement unit no. */
(chainBound < DOUBLE_MAX_UNIT_CHAIN) ) {
ANANDUnitNo nextVirtualUnitNo, nextReplacementUnitNo;
if( !isAvailable(nextUnitNo) )
break;
getUnitData(&vol,nextUnitNo,&nextVirtualUnitNo,&nextReplacementUnitNo);
if( nextVirtualUnitNo != (firstVirtualUnitNo | ANAND_REPLACING_UNIT) )
break; /* Virtual unit no. not validated */
lastUnit = nextUnitNo;
nextUnitNo = nextReplacementUnitNo;
chainBound++;
}
return lastUnit;
}
#ifndef FL_READ_ONLY
/*----------------------------------------------------------------------*/
/* a s s i g n U n i t */
/* */
/* Assigns a virtual unit no. to a unit */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical unit number */
/* virtualUnitNo : Virtual unit number to assign */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus assignUnit(Anand vol, ANANDUnitNo unitNo, ANANDUnitNo virtualUnitNo)
{
ANANDUnitNo newVirtualUnitNo, newReplacementUnitNo;
ANANDUnitNo oldVirtualUnitNo, oldReplacementUnitNo;
FLStatus status;
ANANDUnitNo newestUnitNo = vol.virtualUnits[virtualUnitNo];
ANANDUnitNo oldUnitNo;
/* Assign the new unit */
newVirtualUnitNo = virtualUnitNo;
if (newestUnitNo != ANAND_NO_UNIT)
newVirtualUnitNo |= ANAND_REPLACING_UNIT;
newReplacementUnitNo = ANAND_NO_UNIT;
vol.physicalUnits[unitNo] = 0;
vol.freeUnits--;
status = setUnitData(&vol,unitNo,newVirtualUnitNo,newReplacementUnitNo);
if (status != flOK)
{
markUnitBad(&vol,unitNo);
return status;
}
/* Add unit to chain */
if (newestUnitNo != ANAND_NO_UNIT)
{
/* If unit is frozen, don't attempt to chain (folding not-in-place) */
if (!isAvailable(newestUnitNo))
return flOK;
oldUnitNo = lastInChain(&vol,newestUnitNo);
getUnitData(&vol,oldUnitNo,&oldVirtualUnitNo,&oldReplacementUnitNo);
if (oldReplacementUnitNo != ANAND_NO_UNIT)
status = flWriteFault; /* can't write here, so assume failure */
else {
vol.physicalUnits[oldUnitNo] |= UNIT_REPLACED;
status = setUnitData(&vol,oldUnitNo,oldVirtualUnitNo,unitNo);
}
if (status != flOK) {
formatUnit(&vol,unitNo); /* Get rid of the allocated unit quickly */
setUnavail(newestUnitNo); /* freeze the chain */
return status;
}
if (vol.countsValid > virtualUnitNo && newestUnitNo != oldUnitNo){
if (countOf(newestUnitNo) + countOf(oldUnitNo) <= UNIT_MAX_COUNT)
vol.physicalUnits[newestUnitNo] += countOf(oldUnitNo);
else
return flGeneralFailure;
}
}
else
vol.virtualUnits[virtualUnitNo] = unitNo;
return flOK;
}
#endif /* FL_READ_ONLY */
/*----------------------------------------------------------------------*/
/* f o r m a t C h a i n */
/* */
/* Format all the units in a chain. Start from the last one and go */
/* backwards until unitNo is reached. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Format the chain from this unit onwards */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus formatChain(Anand vol, ANANDUnitNo unitNo)
{
/* Erase the chain from end to start */
ANANDUnitNo chainBound;
setUnitCount(unitNo,0); /* Reenable erase of this unit */
for (chainBound=0;( chainBound < DOUBLE_MAX_UNIT_CHAIN ); chainBound++) {
/* Find last unit in chain */
ANANDUnitNo unitToErase = lastInChain(&vol,unitNo);
if( formatUnit(&vol,unitToErase) != flOK )
break;
if (unitToErase == unitNo)
break; /* Erased everything */
}
return flOK;
}
#ifndef FL_READ_ONLY
/*----------------------------------------------------------------------*/
/* S w a p U n i t s */
/* */
/* Applies wear leveling. */
/* A rover unit dictates the current unit to level. If a unit chain */
/* fold, if single unit chain , append a unit and then fold. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
FLStatus swapUnits(Anand vol)
{
ANANDUnitNo i,unitNo,virtualUnitNo,replacementUnitNo;
FLStatus status;
if(vol.wearLevel.currUnit>=vol.noOfVirtualUnits)
return flOK;
for(i=0,unitNo=vol.virtualUnits[vol.wearLevel.currUnit];
(unitNo==ANAND_NO_UNIT) && (i<vol.noOfVirtualUnits);i++) {
vol.wearLevel.currUnit++;
if(vol.wearLevel.currUnit>=vol.noOfVirtualUnits)
vol.wearLevel.currUnit = 0;
unitNo=vol.virtualUnits[vol.wearLevel.currUnit];
}
if(unitNo==ANAND_NO_UNIT) /*The media is empty*/
return flOK;
virtualUnitNo = vol.wearLevel.currUnit;
vol.wearLevel.currUnit++;
if(vol.wearLevel.currUnit>=vol.noOfVirtualUnits)
vol.wearLevel.currUnit = 0;
if((vol.physicalUnits[unitNo] & UNIT_REPLACED) ||
(!isAvailable(unitNo) ) )
{
status = foldUnit(&vol,virtualUnitNo,FALSE);
}
else
{
checkStatus(allocateUnit(&vol,&replacementUnitNo));
return assignUnit(&vol,replacementUnitNo,virtualUnitNo);
}
/* If folding failed make sure there are enough units and call again */
if(status == flCanNotFold)
return checkFolding(&vol,virtualUnitNo);
return status;
}
/*----------------------------------------------------------------------*/
/* f i n d F r e e U n i t */
/* */
/* Find a free unit from the physical unit pool. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Receives the physical unit no. */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus findFreeUnit(Anand vol, ANANDUnitNo *unitNo)
{
ANANDUnitNo originalUnit = vol.roverUnit;
unsigned short eraseMark;
unsigned long eraseCount;
do
{
if (++vol.roverUnit >= vol.noOfUnits)
vol.roverUnit = vol.bootUnits;
if (vol.physicalUnits[vol.roverUnit] == ANAND_UNIT_FREE)
{
/* found a free unit, if not erased, */
getUnitTailer(&vol,vol.roverUnit,&eraseMark,&eraseCount);
if (eraseMark != ERASE_MARK)
{
if (formatUnit(&vol,vol.roverUnit) != flOK)
continue; /* this unit is bad, find another */
}
*unitNo = vol.roverUnit;
return flOK;
}
} while (vol.roverUnit != originalUnit);
return flNotEnoughMemory; /* Report no space at all */
}
/*----------------------------------------------------------------------*/
/* f o l d U n i t */
/* */
/* Copy all the sectors that hold valid data in the chain to the last */
/* unit of the chain and erase the chain. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* virtualUnitNo : Virtual unit number of the first unit in chain. */
/* forceFolding : Boolean flag stating wether to force folding even */
/* at the cost of loosing sector data. */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus foldUnit(Anand vol, ANANDUnitNo virtualUnitNo, FLBoolean forceFolding)
{
ANANDUnitNo unitNo = vol.virtualUnits[virtualUnitNo];
ANANDUnitNo targetUnitNo, chainBound;
unsigned long foldMark;
SectorNo virtualSectorNo = (SectorNo)virtualUnitNo * vol.sectorsPerUnit;
CardAddress endSectorAddress;
CardAddress targetSectorAddress;
CardAddress sourceSectorAddress;
unsigned newSectorCount, i;
FLBoolean partialFoldingFlag = FALSE;
FLStatus status;
/* Force remapping of internal catched sector */
vol.flash->socket->remapped = TRUE;
vol.unitsFolded++;
/* When using FL_OFF option the media is scanned in the folding operation */
#if (defined(VERIFY_WRITE) || defined(VERIFY_ERASED_SECTOR))
if(flVerifyWrite[flSocketNoOf(vol.flash->socket)][vol.flash->socket->curPartition]==FL_OFF)
{
checkStatus(verifySectors(&vol,SECTORS_VERIFIED_PER_FOLDING));
vol.curSectorWrite = virtualSectorNo;
}
#endif /* VERIFY_WRITE || VERIFY_ERASED_SECTOR */
/* Find target unit */
if (!isAvailable(unitNo)) /* If this unit is frozen, */
{
if(vol.freeUnits > 0)
{
/* allocate a new unit to fold into */
checkStatus(findFreeUnit(&vol,&targetUnitNo));
checkStatus(assignUnit(&vol,targetUnitNo,virtualUnitNo));
}
else
{
if(forceFolding==FALSE)
return flCanNotFold;
partialFoldingFlag = TRUE;
}
}
if((isAvailable(unitNo)) || (partialFoldingFlag == TRUE))
{ /* Default. Fold into end of chain */
targetUnitNo = unitNo;
for (chainBound=0;( chainBound < DOUBLE_MAX_UNIT_CHAIN );chainBound++)
{
ANANDUnitNo nextUnitNo = getNextUnit(&vol,targetUnitNo,virtualUnitNo);
if (nextUnitNo == ANAND_NO_UNIT)
break;
targetUnitNo = nextUnitNo;
}
if(chainBound == DOUBLE_MAX_UNIT_CHAIN)
{
targetUnitNo = findEndOfEndlessChain(&vol, virtualUnitNo);
}
}
/***********************************/
/* Copy all sectors to target unit */
/***********************************/
/* Mark unit as currently folded */
foldMark = FOLDING_IN_PROGRESS * 0x10001l;
if( getFoldMark(&vol,unitNo) != FOLDING_IN_PROGRESS )
vol.flash->write(vol.flash,
unitBaseAddress(&vol,unitNo) + FOLD_MARK_OFFSET,
&foldMark,
sizeof foldMark,
EXTRA);
setUnavail(unitNo); /* Freeze this unit chain */
/* Copy all sectors to target unit */
targetSectorAddress = unitBaseAddress(&vol,targetUnitNo);
newSectorCount = 0;
for (i = 0; i < vol.sectorsPerUnit; i++, virtualSectorNo++,
#if (defined(VERIFY_WRITE) || defined(VERIFY_ERASED_SECTOR))
vol.curSectorWrite++,
#endif /* VERIFY_WRITE || VERIFY_ERASED_SECTOR */
targetSectorAddress += SECTOR_SIZE)
{
endSectorAddress = ANAND_UNASSIGNED_ADDRESS;
for(chainBound=0;chainBound<DOUBLE_MAX_UNIT_CHAIN;chainBound++)
{
sourceSectorAddress = virtual2Physical(&vol,virtualSectorNo,&endSectorAddress);
if(sourceSectorAddress == targetSectorAddress)
{
/* Sector resides on the last unit of the virtual chain and */
/* does not need to be copied */
#if (defined(VERIFY_WRITE) || defined(VERIFY_ERASED_SECTOR))
switch(flVerifyWrite[flSocketNoOf(vol.flash->socket)][vol.flash->socket->curPartition])
{
case FL_UPS:
newSectorCount++;
goto nextSectorLable;
case FL_OFF:
if(vol.verifiedSectorNo > virtualSectorNo)
{
newSectorCount++;
goto nextSectorLable;
}
default: /* FL_ON */
break;
}
/* Validate the sector has valid EDC/ECC */
status = vol.flash->read(vol.flash,sourceSectorAddress,nftlBuffer,SECTOR_SIZE,EDC);
if(status!=flOK)
{ /* Last sector of chain has EDC errors - can not fold there */
if(forceFolding!=TRUE)
{
return flCanNotFold;
}
else
{
goto nextSectorLable;
}
}
newSectorCount++;
goto nextSectorLable;
#endif /* VERIFY_WRITE || VERIFY_ERASED_SECTOR */
}
else if(sourceSectorAddress != ANAND_UNASSIGNED_ADDRESS)
{
/* Check that area is free (ignore flag) */
if(getSectorFlags(&vol,targetSectorAddress) != SECTOR_FREE)
{
if(forceFolding!=TRUE)
{
return flCanNotFold;
}
else
{
break;
}
}
/* Copy sector to target sector */
status = vol.flash->read(vol.flash,sourceSectorAddress,nftlBuffer,SECTOR_SIZE,EDC);
if (status != flOK) /* Try reading previous sector */
{
endSectorAddress = sourceSectorAddress;
continue;
}
status = writeAndCheck(&vol,targetSectorAddress,nftlBuffer,EDC);
switch (status)
{
case flOK: /* Success */
vol.parasiteWrites++;
newSectorCount++;
goto nextSectorLable;
case flWriteFault: /* Faild in verify write */
if (forceFolding == FALSE)
return flCanNotFold;
goto nextSectorLable;
default : /* Protection error or any other */
return status;
}
}
else /* ANAND_UNASSIGNED_ADDRESS - Sector not used */
{
goto nextSectorLable;
}
}
return flGeneralFailure;
nextSectorLable:;
} /* End of copy sector loop */
/*****************************/
/* Add unit to virtual chain */
/*****************************/
if (newSectorCount > 0) { /* Some sectors remaining*/
/* Mark target unit as original */
if( (setUnitData(&vol,targetUnitNo,virtualUnitNo,ANAND_NO_UNIT) != flOK ) ||
(partialFoldingFlag == TRUE))
{
setUnavail(targetUnitNo); /* freeze this unit */
}
else
{
setUnitCount(targetUnitNo,newSectorCount);
}
/* Set target unit in virtual unit table */
vol.virtualUnits[virtualUnitNo] = targetUnitNo;
}
else {
if (unitNo != targetUnitNo) {
/* If there is a chain to delete ... */
/* mark unit as completed folding, pending erase */
#ifndef NT5PORT
unsigned long foldMark = FOLDING_COMPLETE * 0x10001l;
#else /*NT5PORT*/
foldMark = FOLDING_COMPLETE * 0x10001l;
#endif /*NT5PORT*/
vol.flash->write(vol.flash,
unitBaseAddress(&vol,unitNo) + FOLD_MARK_OFFSET,
&foldMark,
sizeof foldMark,
EXTRA);
}
vol.virtualUnits[virtualUnitNo] = ANAND_NO_UNIT;
}
/* Erase source units */
return formatChain(&vol,unitNo);
}
/*----------------------------------------------------------------------*/
/* c r e a t e U n i t C o u n t */
/* */
/* Count the number of sectors in a unit that hold valid data. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Physical unit number */
/* */
/*----------------------------------------------------------------------*/
static void createUnitCount(Anand vol, ANANDUnitNo unitNo)
{
unsigned int i;
SectorNo sectorNo;
CardAddress sectorAddress;
ANANDUnitNo physicalUnitNo = vol.virtualUnits[unitNo];
if (physicalUnitNo == ANAND_NO_UNIT)
return;
if (!isAvailable(physicalUnitNo))
return;
/* Get a count of the valid sector in this unit */
setUnitCount(physicalUnitNo,0);
sectorNo = (SectorNo)unitNo * vol.sectorsPerUnit;
for (i = 0; i < vol.sectorsPerUnit; i++, sectorNo++) {
sectorAddress = virtual2Physical(&vol,sectorNo,NULL);
if (sectorAddress != ANAND_UNASSIGNED_ADDRESS) {
ANANDUnitNo currUnitNo = (ANANDUnitNo)(sectorAddress >> vol.unitSizeBits);
if (vol.physicalUnits[currUnitNo] & UNIT_REPLACED)
currUnitNo = physicalUnitNo;
/* Increament sector count - Assumed EDC OK , was not verified */
vol.physicalUnits[currUnitNo]++;
}
}
}
/*----------------------------------------------------------------------*/
/* f o l d B e s t C h a i n */
/* */
/* Find the best chain to fold and fold it.A good chain to fold is a */
/* long chain with a small number of sectors that hold valid data. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Receives the physical unit no. of the first */
/* unit in the chain that was folded. */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus foldBestChain(Anand vol, ANANDUnitNo *unitNo)
{
unsigned leastCount;
unsigned longestChain;
unsigned unitCount;
ANANDUnitNo virtualUnitNo;
ANANDUnitNo u;
ANANDUnitNo firstUnitNo;
unsigned int maxCounter;
FLStatus status = flCanNotFold;
/* Loop as long as can not fold in place or until MAX_FOLDING_TRIES time */
for (maxCounter = 0 ; maxCounter < MAX_FOLDING_TRIES ; maxCounter++)
{
leastCount = vol.sectorsPerUnit + 1; /* Set to invalid sector count */
longestChain = 0; /* Set to invalid unit length */
virtualUnitNo = ANAND_NO_UNIT;
/*************************************************************/
/* Loop over all virtual units until best candidate is found */
/*************************************************************/
for (u = 0; u < vol.noOfVirtualUnits; u++)
{
/* If virtual unit does not exist continue to next unit */
firstUnitNo = vol.virtualUnits[u];
if( firstUnitNo == ANAND_NO_UNIT )
continue;
/* Make sure sector count of unit is valid */
if (vol.countsValid <= u)
{
createUnitCount(&vol,u); /* Update sector count */
vol.countsValid = u + 1;
}
if( isAvailable(firstUnitNo) ) /* store sector count */
{
unitCount = countOf(firstUnitNo);
}
else
{
unitCount = vol.sectorsPerUnit; /* set low priority */
}
/* This is an empty unit. We can simply erase it */
if (unitCount == 0)
{
leastCount = 0;
virtualUnitNo = u;
break;
}
if(/* Smallest sector count found so far */
(leastCount >= unitCount ) &&
/* And this unit is not a single unit chain */
(vol.physicalUnits[firstUnitNo] & UNIT_REPLACED) )
{
unsigned chainLength = 0;
/* Compare chain length */
ANANDUnitNo nextUnitNo = getNextUnit(&vol,firstUnitNo,u);
if(isAvailable(firstUnitNo))
{
while((nextUnitNo != ANAND_NO_UNIT ) &&
(chainLength < DOUBLE_MAX_UNIT_CHAIN))
{
chainLength++;
nextUnitNo = getNextUnit(&vol,nextUnitNo,u);
}
}
else
{
chainLength = 0; /* Set lowest priority to frozen chain */
}
/* set low priority to neverending loop chain */
if(chainLength == DOUBLE_MAX_UNIT_CHAIN)
chainLength = 0;
if((leastCount == unitCount ) && (longestChain >= chainLength))
continue;
longestChain = chainLength;
leastCount = unitCount;
virtualUnitNo = u;
} /* End - unit has less (or eqaul) no' of used sectors found so far */
} /* End - Loop over all virtual units and find best candidate */
/*************************************************************/
/* Candidate virtual chain has been chosen - try and fold it */
/*************************************************************/
if ((leastCount > vol.sectorsPerUnit) ||
(virtualUnitNo == ANAND_NO_UNIT))
{
/* Only single units chains were found */
if(maxCounter==0) /* And no chain was frozen while searching */
return flNotEnoughMemory; /* Report no space at all */
break; /* Try and fold the frozen units that have been found */
}
else /* Try and fold the candidate unit */
{
if(!isAvailable(vol.virtualUnits[virtualUnitNo])) /* This is a frozen unit */
{
/* Frozen chains have the lowest priority - stop searching */
break;
}
else /* Try and fold the unit */
{
/* Store the first unit as the new free unit */
*unitNo = vol.virtualUnits[virtualUnitNo];
/* Store number of free Units */
u = vol.freeUnits;
/* Fold the candidate unit */
status = foldUnit(&vol,virtualUnitNo,FALSE);
switch(status)
{
case flOK:
if(vol.freeUnits == u) /* Did not free any units */
continue;
break;
case flCanNotFold: /* Need to fold not in place */
continue;
default:
return status;
}
break;
}
}
} /* End MAX_FOLDING_TRIES loop */
/***************************************************************/
/* Check folding status - might need a special kind of folding */
/***************************************************************/
if(maxCounter)
{
*unitNo = ANAND_NO_UNIT;
/* Unfreeze all units */
for (u = vol.spareOrgUnit + 1; u < vol.noOfUnits; u++)
{
if(!isAvailable(u)) /* This is a frozen unit */
{
/* Get virtual unit of frozen physical unit */
getUnitData(&vol,u,&virtualUnitNo,&firstUnitNo);
if(virtualUnitNo < vol.noOfVirtualUnits)
{
/* Store the first unit as the new free unit */
firstUnitNo = vol.virtualUnits[virtualUnitNo];
/* Force folding no matter what */
if(firstUnitNo != ANAND_NO_UNIT)
{
checkStatus(foldUnit(&vol,virtualUnitNo,TRUE));
/* Recalculate sector count */
createUnitCount(&vol, virtualUnitNo);
*unitNo = firstUnitNo;
}
}
}
}
}
if((*unitNo!= ANAND_NO_UNIT) && (vol.freeUnits > 0)) /* A unit was freed */
return flOK;
else
return flGeneralFailure;
}
/*----------------------------------------------------------------------*/
/* a l l o c a t e U n i t */
/* */
/* Find a free unit to allocate, erase it if necessary. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Receives the physical number of the allocated */
/* unit */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus allocateUnit(Anand vol, ANANDUnitNo *unitNo)
{
ANANDUnitNo originalUnit = vol.roverUnit;
FLStatus status;
if (vol.freeUnits < 2) /* Try to make sure not to use the last unit */
{
status = foldBestChain(&vol,unitNo);
if(status != flNotEnoughMemory)
return status;
}
return findFreeUnit(&vol, unitNo);
}
#endif /* FL_READ_ONLY */
/*----------------------------------------------------------------------*/
/* m a p S e c t o r */
/* */
/* Maps and returns location of a given sector no. */
/* NOTE: This function is used in place of a read-sector operation. */
/* */
/* A one-sector cache is maintained to save on map operations. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* sectorNo : Sector no. to read */
/* physAddress : Optional pointer to receive sector address */
/* */
/* Returns: */
/* Pointer to physical sector location. NULL returned if sector */
/* does not exist. */
/*----------------------------------------------------------------------*/
static const void FAR0 *mapSector(Anand vol, SectorNo sectorNo, CardAddress *physAddress)
{
if (sectorNo != vol.mappedSectorNo || vol.flash->socket->remapped)
{
if (sectorNo >= vol.virtualSectors)
{
vol.mappedSector = NULL;
}
else
{
int chainBound = 0;
for(vol.mappedSectorAddress=ANAND_UNASSIGNED_ADDRESS;
chainBound<DOUBLE_MAX_UNIT_CHAIN;chainBound++)
{
CardAddress endSectorAddress = vol.mappedSectorAddress;
vol.mappedSectorAddress = virtual2Physical(&vol,sectorNo,&endSectorAddress);
if (vol.mappedSectorAddress == ANAND_UNASSIGNED_ADDRESS)
{
vol.mappedSector = NULL; /* no such sector */
break;
}
else
{
vol.mappedSector = nftlBuffer;
if (vol.flash->read(vol.flash,vol.mappedSectorAddress,nftlBuffer,SECTOR_SIZE,EDC) == flOK)
break;
}
}
vol.mappedSectorNo = sectorNo;
vol.flash->socket->remapped = FALSE;
}
}
if (physAddress)
*physAddress = vol.mappedSectorAddress;
return vol.mappedSector;
}
/* Mounting and formatting */
/*----------------------------------------------------------------------*/
/* m o u n t U n i t */
/* */
/* Mount one unit. Read the relevant data from the unit header and */
/* update the conversion tables. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : Unit to mount */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus mountUnit(Anand vol, ANANDUnitNo unitNo,
unsigned long* eraseCount)
{
ANANDUnitNo virtualUnitNo, replacementUnitNo;
unsigned short eraseMark;
ANANDPhysUnit FAR1 *pU = &vol.physicalUnits[unitNo];
getUnitData(&vol,unitNo,&virtualUnitNo,&replacementUnitNo);
getUnitTailer(&vol,unitNo,&eraseMark,eraseCount);
if (virtualUnitNo == ANAND_NO_UNIT ||
eraseMark != ERASE_MARK) { /* this unit is not assigned */
*pU = ANAND_UNIT_FREE;
}
else { /* this unit is assigned */
*pU &= UNIT_ORPHAN;
if (replacementUnitNo < vol.noOfUnits) {
*pU |= UNIT_REPLACED;
if (isAvailable(replacementUnitNo) ||
isReplaced(replacementUnitNo))
/* Mark replacement unit as non-orphan */
vol.physicalUnits[replacementUnitNo] &= ~UNIT_ORPHAN;
}
if (!(virtualUnitNo & ANAND_REPLACING_UNIT)) {
unsigned short foldMark;
ANANDUnitNo physUnitNo;
if (virtualUnitNo >= vol.noOfVirtualUnits)
return formatUnit(&vol,unitNo);
foldMark = getFoldMark(&vol,unitNo);
physUnitNo = vol.virtualUnits[virtualUnitNo];
if (foldMark == FOLDING_COMPLETE)
formatChain(&vol,unitNo);
else if (physUnitNo == ANAND_NO_UNIT || !isAvailable(physUnitNo)) {
/* If we have duplicates, it's OK if one of them is currently folded */
vol.virtualUnits[virtualUnitNo] = unitNo;
*pU &= ~UNIT_ORPHAN;
if (foldMark == FOLDING_IN_PROGRESS) {
setUnavail(unitNo);
}
if (physUnitNo != ANAND_NO_UNIT)
formatChain(&vol,physUnitNo); /* Get rid of old chain */
}
else if (foldMark == FOLDING_IN_PROGRESS)
formatChain(&vol,unitNo);
else
return flBadFormat; /* We have a duplicate to a unit that */
/* is not currently folded. That's bad. */
}
}
return flOK;
}
#ifndef FL_READ_ONLY
/*----------------------------------------------------------------------*/
/* a l l o c a t e A n d W r i t e S e c t o r */
/* */
/* Write to sectorNo. if necessary, allocate a free sector first. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* sectorNo : Virtual sector no. to write */
/* fromAddress : Address of sector data. */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus allocateAndWriteSector(void* rec,
SectorNo sectorNo,
void FAR1 *fromAddress)
{
Anand vol = (Anand*)rec;
ANANDUnitNo virtualUnitNo = (ANANDUnitNo)(sectorNo / vol.sectorsPerUnit);
ANANDUnitNo firstUnitNo = vol.virtualUnits[virtualUnitNo];
ANANDUnitNo unitNo;
unsigned unitOffset = (unsigned)((sectorNo % vol.sectorsPerUnit) << SECTOR_SIZE_BITS);
unsigned unitChainLength = 0;
FLBoolean sectorExists = FALSE;
FLBoolean unitWasFoldedOutOfPlace = FALSE;
FLStatus status;
/* If we can't write to this unit, must fold it first */
if (firstUnitNo != ANAND_NO_UNIT && !isAvailable(firstUnitNo)) {
status = foldUnit(&vol,virtualUnitNo,FALSE);
switch(status)
{
case flOK:
break;
case flCanNotFold:
checkStatus(checkFolding(&vol,virtualUnitNo));
break;
default:
return status;
}
firstUnitNo = vol.virtualUnits[virtualUnitNo];
}
/* Find a unit to write this sector */
unitNo = firstUnitNo;
while ((unitNo != ANAND_NO_UNIT) && (unitChainLength < DOUBLE_MAX_UNIT_CHAIN)) {
unsigned char sectorFlags = getSectorFlags(&vol,unitBaseAddress(&vol,unitNo) + unitOffset);
if (sectorFlags == SECTOR_FREE)
break;
if (sectorFlags != SECTOR_IGNORE)
sectorExists = sectorFlags == SECTOR_USED;
unitNo = getNextUnit(&vol,unitNo,virtualUnitNo);
unitChainLength++;
}
if (unitChainLength == DOUBLE_MAX_UNIT_CHAIN) { /* unit points to itself */
unitNo = ANAND_NO_UNIT; /* force folding not in place */
setUnavail(firstUnitNo);
}
if (unitNo == ANAND_NO_UNIT) { /* Can not write in chain - must add a unit */
firstUnitNo = vol.virtualUnits[virtualUnitNo];
if (unitChainLength >= MAX_UNIT_CHAIN)
{
status = foldUnit(&vol,virtualUnitNo,FALSE);
switch(status)
{
case flOK:
break;
case flCanNotFold:
checkStatus(checkFolding(&vol,virtualUnitNo));
break;
default:
return status;
}
}
if(vol.virtualUnits[virtualUnitNo] != firstUnitNo)
{
firstUnitNo = vol.virtualUnits[virtualUnitNo];
unitWasFoldedOutOfPlace = TRUE;
}
checkStatus(allocateUnit(&vol,&unitNo));
checkStatus(assignUnit(&vol,unitNo,virtualUnitNo));
if(vol.virtualUnits[virtualUnitNo] != firstUnitNo)
{
firstUnitNo = vol.virtualUnits[virtualUnitNo];
unitWasFoldedOutOfPlace = TRUE;
}
#if (defined(VERIFY_WRITE) || defined(VERIFY_ERASED_SECTOR))
/* Folding might have discovered that the sector we are using is invalid */
if(sectorExists) {
if( unitWasFoldedOutOfPlace ) {
/* Unit was folded out of place, so if sector exists it must be in
* the first unit of the chain
*/
if(getSectorFlags(&vol,unitBaseAddress(&vol,firstUnitNo) + unitOffset)
!= SECTOR_USED) {
/* The sector we saw before had bad EDC */
sectorExists = FALSE;
unitNo = firstUnitNo;
}
}
}
#endif /* VERIFY_WRITE || VERIFY_ERASED_SECTOR */
}
#if (defined(VERIFY_WRITE) || defined(VERIFY_ERASED_SECTOR))
vol.curSectorWrite = sectorNo;
#endif /* VERIFY_WRITE || VERIFY_ERASED_SECTOR */
checkStatus(writeAndCheck(&vol,unitBaseAddress(&vol,unitNo) + unitOffset,fromAddress,EDC));
if (vol.countsValid > virtualUnitNo) {
if (unitNo != firstUnitNo && !(vol.physicalUnits[unitNo] & UNIT_REPLACED)) {
if (countOf(unitNo) < UNIT_MAX_COUNT) /* Increment block count */
vol.physicalUnits[unitNo]++;
else
return flGeneralFailure;
if (sectorExists) /* Decrement block count */
{
if (countOf(firstUnitNo) > 0)
vol.physicalUnits[firstUnitNo]--;
else
return flGeneralFailure;
}
}
else if (!sectorExists) {
if (countOf(firstUnitNo) < UNIT_MAX_COUNT) /* Increment block count */
vol.physicalUnits[firstUnitNo]++;
else
return flGeneralFailure;
}
}
return flOK;
}
/*----------------------------------------------------------------------*/
/* w r i t e S e c t o r */
/* */
/* Writes a sector. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* sectorNo : Virtual sector no. to write */
/* fromAddress : Data to write */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus writeSector(Anand vol, SectorNo sectorNo, void FAR1 *fromAddress)
{
FLStatus status = flWriteFault;
int i;
if (vol.badFormat)
return flBadFormat;
if (sectorNo >= vol.virtualSectors)
return flSectorNotFound;
if(vol.wearLevel.currUnit!=ANAND_NO_UNIT) {
vol.wearLevel.alarm++;
if(vol.wearLevel.alarm>=WLnow) {
vol.wearLevel.alarm = 0;
checkStatus(swapUnits(&vol));
}
}
if (sectorNo == vol.mappedSectorNo)
{
/* Force remapping of internal catched sector */
vol.flash->socket->remapped = TRUE;
}
vol.sectorsWritten++;
for (i = 0; i < 4 && status == flWriteFault; i++) {
if (vol.mappedSectorNo == sectorNo)
vol.mappedSectorNo = UNASSIGNED_SECTOR;
status = allocateAndWriteSector(&vol,sectorNo,fromAddress);
}
return status;
}
/*----------------------------------------------------------------------*/
/* d e l e t e S e c t o r */
/* */
/* Marks contiguous sectors as deleted. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* sectorNo : First sector no. to delete */
/* noOfSectors : No. of sectors to delete */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus deleteSector(Anand vol, SectorNo sectorNo, SectorNo noOfSectors)
{
SectorNo iSector;
FLStatus status;
if (vol.badFormat)
return flBadFormat;
if (sectorNo + noOfSectors > vol.virtualSectors)
return flSectorNotFound;
for (iSector = 0; iSector < noOfSectors; iSector++, sectorNo++,
vol.sectorsDeleted++) {
CardAddress sectorAddress = virtual2Physical(&vol,sectorNo,NULL);
if (sectorAddress != ANAND_UNASSIGNED_ADDRESS) {
byte sectorFlags[2];
ANANDUnitNo currUnitNo;
/* Check that the unit is writable, and if not, fold it first */
ANANDUnitNo virtualUnitNo = (ANANDUnitNo)(sectorNo / vol.sectorsPerUnit);
ANANDUnitNo unitNo = vol.virtualUnits[virtualUnitNo];
if (!isAvailable(unitNo)) {
status = foldUnit(&vol,virtualUnitNo,FALSE);
switch(status)
{
case flOK:
break;
case flCanNotFold:
checkStatus(checkFolding(&vol,virtualUnitNo));
break;
default:
return status;
}
sectorAddress = virtual2Physical(&vol,sectorNo,NULL);
}
/* Mark sector deleted */
sectorFlags[0] = sectorFlags[1] = SECTOR_DELETED;
#ifdef NFTL_CACHE
setSectorFlagsCache(&vol, sectorAddress, SECTOR_DELETED);
#ifdef ENVIRONMENT_VARS
if (((flMarkDeleteOnFlash == FL_ON) &&
(flPolicy[vol.socketNo][vol.flash->socket->curPartition] != FL_COMPLETE_ASAP)) ||
(vol.scache == NULL))
#endif /* ENVIRONMENT_VARS */
#endif
vol.flash->write(vol.flash,
sectorAddress + SECTOR_DATA_OFFSET,
#ifndef NT5PORT
&sectorFlags,
#else /*NT5PORT*/
sectorFlags,
#endif /*NT5PORT*/
sizeof sectorFlags,
EXTRA);
currUnitNo = (ANANDUnitNo)(sectorAddress >> vol.unitSizeBits);
if ( isAvailable(currUnitNo) ) {
if (vol.physicalUnits[currUnitNo] & UNIT_REPLACED)
currUnitNo = vol.virtualUnits[virtualUnitNo];
if (vol.countsValid > virtualUnitNo) {
if (countOf(currUnitNo) > 0)
vol.physicalUnits[currUnitNo]--; /* Decrement block count */
else
return flGeneralFailure;
}
}
}
}
return flOK;
}
#endif /* FL_READ_ONLY */
/*----------------------------------------------------------------------*/
/* t l S e t B u s y */
/* */
/* Notifies the start and end of a file-system operation. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* state : FL_ON (1) = operation entry */
/* FL_OFF(0) = operation exit */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus tlSetBusy(Anand vol, FLBoolean state)
{
return flOK;
}
#ifndef FL_READ_ONLY
#ifdef DEFRAGMENT_VOLUME
/*----------------------------------------------------------------------*/
/* d e f r a g m e n t */
/* */
/* Performs unit allocations to arrange a minimum number of writable */
/* sectors. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* sectorsNeeded : Minimum required sectors */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus defragment(Anand vol, long FAR2 *sectorsNeeded)
{
ANANDUnitNo dummyUnitNo, firstFreeUnit = ANAND_NO_UNIT;
FLBoolean firstRound = TRUE;
FLStatus status = flOK;
if( (*sectorsNeeded) == -1 ) { /* fold single chain */
if (vol.badFormat)
return flBadFormat;
status = foldBestChain(&vol,&dummyUnitNo);
if( (status != flOK) && (vol.freeUnits == 0) )
return status;
*sectorsNeeded = vol.freeUnits * vol.sectorsPerUnit;
return flOK;
}
while ((SectorNo)vol.freeUnits * vol.sectorsPerUnit < ((SectorNo)(*sectorsNeeded))) {
if (vol.badFormat)
return flBadFormat;
status = allocateUnit(&vol,&dummyUnitNo);
if( status != flOK )
break;
if (firstRound) { /* remember the first free unit */
firstFreeUnit = dummyUnitNo;
firstRound = FALSE;
}
else if (firstFreeUnit == dummyUnitNo) {
/* We have wrapped around, all the units that were marked as free */
/* are now erased, and we still don't have enough space. */
status = foldBestChain(&vol,&dummyUnitNo); /* make more free units */
if( status != flOK )
break;
}
}
*sectorsNeeded = (long)vol.freeUnits * vol.sectorsPerUnit;
return status;
}
#endif /* DEFRAGMENT_VOLUME */
#endif /* FL_READ_ONLY */
/*----------------------------------------------------------------------*/
/* s e c t o r s I n V o l u m e */
/* */
/* Gets the total number of sectors in the volume */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* */
/* Returns: */
/* Number of sectors in the volume */
/*----------------------------------------------------------------------*/
static SectorNo sectorsInVolume(Anand vol)
{
return vol.virtualSectors;
}
/*----------------------------------------------------------------------*/
/* d i s m o u n t N F T L */
/* */
/* Dismount NFTL volume */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* */
/*----------------------------------------------------------------------*/
static void dismountNFTL(Anand vol)
{
#ifdef FL_MALLOC
if( vol.physicalUnits != NULL )
FL_FAR_FREE (vol.physicalUnits);
if( vol.virtualUnits != NULL )
FL_FAR_FREE (vol.virtualUnits);
vol.physicalUnits = NULL;
vol.virtualUnits = NULL;
#ifdef NFTL_CACHE
if( vol.ucache != NULL )
FL_FAR_FREE (vol.ucache);
if( vol.scache != NULL )
FL_FAR_FREE (vol.scache);
vol.ucache = NULL;
vol.scache = NULL;
#endif /* NFTL_CACHE */
#endif /* FL_MALLOC */
}
Anand* getAnandRec(unsigned driveNo)
{
return (&vols[driveNo]);
}
#ifdef FORMAT_VOLUME
/*----------------------------------------------------------------------*/
/* i s E r a s e d U n i t */
/* */
/* Check if a unit is erased. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* unitNo : unit to check */
/* */
/* Returns: */
/* TRUE if unit is erased, FALSE otherwise */
/*----------------------------------------------------------------------*/
static FLBoolean isErased(Anand vol, ANANDUnitNo unitNo)
{
CardAddress addr;
CardAddress endAddr;
word offset;
/* Force remapping of internal catched sector */
vol.flash->socket->remapped = TRUE;
addr = unitBaseAddress(&vol,unitNo);
endAddr = addr + (1L << vol.unitSizeBits);
for (;addr < endAddr; addr += SECTOR_SIZE)
{
/* Check area a and b */
vol.flash->read(vol.flash, addr, nftlBuffer,SECTOR_SIZE, 0);
for (offset=0;offset<SECTOR_SIZE;offset+=ANAND_SPARE_SIZE)
if (tffscmp(nftlBuffer+offset, ff, ANAND_SPARE_SIZE))
return FALSE;
/* Check area c */
vol.flash->read(vol.flash, addr, nftlBuffer,ANAND_SPARE_SIZE, EXTRA);
if (tffscmp( nftlBuffer, ff, ANAND_SPARE_SIZE ))
return FALSE;
}
return TRUE;
}
/*----------------------------------------------------------------------*/
/* f o r m a t N F T L */
/* */
/* Perform NFTL Format. */
/* */
/* Parameters: */
/* volNo : Volume serial no. */
/* formatParams : Address of FormatParams structure to use */
/* flash : Flash media mounted on this socket */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus formatNFTL(unsigned volNo, TLFormatParams *formatParams, FLFlash *flash)
{
Anand vol = &vols[volNo];
long int unitSize;
unsigned long prevVirtualSize;
ANANDUnitNo iUnit, prevOrgUnit;
ANANDUnitNo noOfBootUnits=0;
ANANDBootRecord bootRecord;
int noOfBadUnits = 0;
FLStatus status = flOK;
FLBoolean forceHeaderUpdate = FALSE;
static unsigned char checkSum[EXTRA_LEN] =
{ 0x4B, 0x00, 0xE2, 0x0E, 0x93, 0xF7, 0x55, 0x55 };
#ifdef EXTRA_LARGE
int moreUnitBits;
unsigned char anandFlagsTmp;
#endif /* EXTRA_LARGE */
DEBUG_PRINT(("Debug: starting NFTL format.\r\n"));
checkStatus(initNFTL(&vol,flash));
tffsset(&bootRecord,0,sizeof(ANANDBootRecord));
/* Find the medium boot record */
for (vol.orgUnit = 0; vol.orgUnit < vol.noOfUnits; vol.orgUnit++)
{
vol.flash->read(vol.flash,
unitBaseAddress(&vol,vol.orgUnit),
&bootRecord,
sizeof bootRecord,
0);
if (tffscmp(bootRecord.bootRecordId,"ANAND",sizeof bootRecord.bootRecordId) == 0)
break;
}
#ifdef EXTRA_LARGE
if (vol.orgUnit >= vol.noOfUnits) { /* first time formatting */
bootRecord.anandFlags = 0xFF;
moreUnitBits = 0;
while( ((vol.noOfUnits >> moreUnitBits) > 4096) &&
((vol.unitSizeBits + moreUnitBits) < MAX_UNIT_SIZE_BITS) &&
(bootRecord.anandFlags > 0xFC) ) {
moreUnitBits++;
bootRecord.anandFlags--;
}
}
moreUnitBits = ~bootRecord.anandFlags & MORE_UNIT_BITS_MASK;
if (moreUnitBits > 0) {
vol.unitSizeBits += moreUnitBits;
vol.noOfUnits >>= moreUnitBits;
vol.orgUnit >>= moreUnitBits;
}
#endif /* EXTRA_LARGE */
/* adjust number of boot area units include the EXB area */
if (formatParams->flags & FL_LEAVE_BINARY_AREA)
{
/* Leave binary area (except for the area between the old
original unit and the new one */
if (formatParams->bootImageLen >= 0)
{
noOfBootUnits += (ANANDUnitNo)((formatParams->bootImageLen - 1) >> vol.unitSizeBits) + 1;
}
else /* Leave binary area excatly as it was */
{
if (vol.orgUnit >= vol.noOfUnits) /* first time formatting */
{
noOfBootUnits = 0;
}
else
{
if (LE2(bootRecord.bootUnits) > noOfBootUnits )
noOfBootUnits = LE2(bootRecord.bootUnits);
}
}
}
else /* Actualy format binary area with a signature */
{
#ifdef WRITE_EXB_IMAGE
if (formatParams->exbLen > 0)
{
noOfBootUnits = (ANANDUnitNo)((formatParams->exbLen - 1)
>> vol.unitSizeBits) + 1;
formatParams->exbLen = noOfBootUnits;
}
else
{
formatParams->exbLen = 0;
}
#endif /* WRITE_EXB_IMAGE */
if(formatParams->noOfBinaryPartitions > 0)
{
noOfBootUnits += (ANANDUnitNo)((formatParams->binaryPartitionInfo
->length - 1) >> vol.unitSizeBits) + 1;
}
}
prevOrgUnit = vol.orgUnit; /* save previous Original Unit */
prevVirtualSize = UNAL4(bootRecord.virtualMediumSize);
vol.bootUnits = noOfBootUnits;
vol.unitOffsetMask = (1L << vol.unitSizeBits) - 1;
vol.sectorsPerUnit = 1 << (vol.unitSizeBits - SECTOR_SIZE_BITS);
/* Add 'percentUse'% of bootUnits to transfer units */
formatParams->percentUse -= (unsigned)(((long)(100 - formatParams->percentUse) * (vol.bootUnits)) / (vol.noOfUnits - vol.bootUnits));
vol.noOfTransferUnits = (ANANDUnitNo)formatParams->noOfSpareUnits;
vol.noOfTransferUnits += (ANANDUnitNo)((long)(vol.noOfUnits - vol.bootUnits) *
(100 - formatParams->percentUse) / 100);
if (vol.noOfUnits <= vol.bootUnits + vol.noOfTransferUnits)
return flVolumeTooSmall;
unitSize = 1L << vol.unitSizeBits;
vol.noOfVirtualUnits = vol.noOfUnits-vol.bootUnits;
checkStatus(initTables(&vol));
for (iUnit = 0; iUnit < (vol.noOfUnits-vol.bootUnits); iUnit++)
vol.virtualUnits[iUnit] = ANAND_NO_UNIT;
if (vol.orgUnit >= vol.noOfUnits)
{
/* no boot record - virgin card, scan it for bad blocks */
DFORMAT_PRINT(("Virgin card rebuilding unit map.\r\n"));
prevVirtualSize = 0L;
tffsset(ff,0xff,ANAND_SPARE_SIZE);
/* Generate the bad unit table */
/* if a unit is not erased it is marked as bad */
for (iUnit = 0; iUnit < vol.noOfUnits; iUnit++)
{
vol.physicalUnits[iUnit] = (unsigned char)(isErased(&vol,iUnit) ? ANAND_UNIT_FREE : UNIT_BAD_ORIGINAL);
#ifndef NT5PORT
DFORMAT_PRINT(("Checking unit %ld\r",(CardAddress)iUnit));
#endif/*NT5PORT*/
}
DFORMAT_PRINT(("\rMedia has been scanned\r\n"));
}
else /* Read bad unit table from boot record */
{
status = vol.flash->read(vol.flash,
unitBaseAddress(&vol,vol.orgUnit) + SECTOR_SIZE,
vol.physicalUnits,
vol.noOfUnits * sizeof(ANANDPhysUnit),
EDC);
if( status != flOK ) {
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return status;
}
}
if(vol.physicalUnits[0] == UNIT_BAD_ORIGINAL)
{
DFORMAT_PRINT(("ERROR - IPL block is bad.\r\n"));
return flBadIPLBlock;
}
/* count bad units */
vol.noOfTransferUnits += 2; /* include orgUnit & spareOrgUnit */
/* Convert first unit of MDOC of any floor > 0 to BAD in order to make it
* unchangeable and force internal EEprom mode */
if(flash->flags & EXTERNAL_EPROM)
{
long docFloorSize;
int iFloor, iPage;
docFloorSize = (flash->chipSize * flash->noOfChips) / flash->noOfFloors;
for(iFloor=1;( iFloor < flash->noOfFloors ); iFloor++)
{
iUnit = (ANANDUnitNo)((docFloorSize * (long)iFloor) >> vol.unitSizeBits);
if( vol.physicalUnits[iUnit] == ANAND_UNIT_FREE )
{
forceHeaderUpdate = TRUE; /* force writing of NFTL Header */
vol.physicalUnits[iUnit] = UNIT_BAD_ORIGINAL; /* mark as BAD */
}
status = vol.flash->erase(vol.flash,
(word)(iUnit << (vol.unitSizeBits - vol.erasableBlockSizeBits)),
(word)(1 << (vol.unitSizeBits - vol.erasableBlockSizeBits)));
if( status != flOK ) {
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return status;
}
for(iPage=0;( iPage < 2 ); iPage++) {
status = vol.flash->write(vol.flash,
unitBaseAddress(&vol,iUnit) + iPage * SECTOR_SIZE,
(const void FAR1 *)checkSum, EXTRA_LEN, EXTRA);
if( status != flOK ) {
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return status;
}
}
}
}
/* Translate physicalUnits[] to internal representation */
for (iUnit = 0; iUnit < vol.noOfUnits; iUnit++) {
if (vol.physicalUnits[iUnit] != ANAND_UNIT_FREE)
vol.physicalUnits[iUnit] = UNIT_BAD_MOUNT;
}
/* extend bootimage area if there are bad units in it */
for( iUnit = vol.bootUnits = 0;
(vol.bootUnits < noOfBootUnits) && (iUnit < vol.noOfUnits);
iUnit++ )
if (isAvailable(iUnit))
vol.bootUnits++;
if (vol.bootUnits < noOfBootUnits) {
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return flVolumeTooSmall;
}
vol.bootUnits = iUnit;
/* Discount transfer units taken by the boot image */
for (iUnit = 0; iUnit < vol.bootUnits; iUnit++)
if (!isAvailable(iUnit)) {
if( vol.noOfTransferUnits <= (ANANDUnitNo)formatParams->noOfSpareUnits ) {
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return flVolumeTooSmall;
}
vol.noOfTransferUnits--;
}
if (vol.noOfUnits <= vol.bootUnits + vol.noOfTransferUnits) {
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return flVolumeTooSmall;
}
vol.virtualSectors = (SectorNo)((vol.noOfUnits - vol.bootUnits - vol.noOfTransferUnits) *
(unitSize / SECTOR_SIZE));
vol.noOfVirtualUnits = (unsigned short)((vol.virtualSectors + vol.sectorsPerUnit - 1) / vol.sectorsPerUnit);
/* Find a place for the boot records and protect them */
/* NOTE : We don't erase the old orgUnits, this might cause a problem
when formatting with bootImageLen = 0 and then formatting with
bootImageLen = 44Kbyte */
for (vol.orgUnit = vol.bootUnits; vol.orgUnit < vol.noOfUnits; vol.orgUnit++)
if (vol.physicalUnits[vol.orgUnit] == ANAND_UNIT_FREE)
break;
vol.physicalUnits[vol.orgUnit] = UNIT_UNAVAIL;
for (vol.spareOrgUnit = vol.orgUnit + 1;
vol.spareOrgUnit < vol.noOfUnits;
vol.spareOrgUnit++)
if (vol.physicalUnits[vol.spareOrgUnit] == ANAND_UNIT_FREE)
break;
vol.physicalUnits[vol.spareOrgUnit] = UNIT_UNAVAIL;
for (iUnit = vol.bootUnits; iUnit < vol.noOfUnits; iUnit++)
{
status = formatUnit(&vol,iUnit);
if(status == flWriteFault)
{
if ((iUnit != vol.orgUnit) && (iUnit != vol.spareOrgUnit))
{
noOfBadUnits++;
vol.physicalUnits[iUnit] = UNIT_BAD_MOUNT; /* Mark it bad in table */
if ((noOfBadUnits+2) >= vol.noOfTransferUnits)
{
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return status;
}
}
}
else if (status != flOK)
{
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return status;
}
if (formatParams->progressCallback)
{
status = (*formatParams->progressCallback)
((word)(vol.noOfUnits - vol.bootUnits),
(word)((iUnit + 1) - vol.bootUnits));
if(status!=flOK)
{
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return status;
}
}
}
/* Prepare the boot record header */
for(iUnit = 0; iUnit < vol.noOfUnits; iUnit++) { /* Convert Bad Block table to previous state */
if( vol.physicalUnits[iUnit] == UNIT_BAD_MOUNT )
vol.physicalUnits[iUnit] = UNIT_BAD_ORIGINAL;
}
#ifdef EXTRA_LARGE
anandFlagsTmp = bootRecord.anandFlags;
#endif /* EXTRA_LARGE */
tffsset(&bootRecord,0xff,sizeof bootRecord);
#ifdef EXTRA_LARGE
bootRecord.anandFlags = anandFlagsTmp;
#endif /* EXTRA_LARGE */
toLE2(bootRecord.noOfUnits,vol.noOfUnits - vol.bootUnits);
toLE2(bootRecord.bootUnits,vol.bootUnits);
tffscpy(bootRecord.bootRecordId,"ANAND",sizeof bootRecord.bootRecordId);
toUNAL4(bootRecord.virtualMediumSize,(CardAddress) vol.virtualSectors * SECTOR_SIZE);
/* Write boot records, spare unit first */
vol.physicalUnits[vol.orgUnit] = ANAND_UNIT_FREE; /* Unprotect it */
vol.physicalUnits[vol.spareOrgUnit] = ANAND_UNIT_FREE; /* Unprotect it */
if( ((prevOrgUnit != vol.orgUnit) || (forceHeaderUpdate == TRUE)) ||
(prevVirtualSize != UNAL4(bootRecord.virtualMediumSize)) )
{
/* Copy boot Record to 512 bytes buffer in order to add EDC */
tffsset(nftlBuffer,0,sizeof nftlBuffer);
tffscpy(nftlBuffer,&bootRecord,sizeof bootRecord);
/* Loop over the original unit and the spare (spare first) */
for (iUnit = vol.spareOrgUnit, prevOrgUnit = 0;
prevOrgUnit < 2 ; prevOrgUnit ++)
{
status = formatUnit(&vol,iUnit); /* Erase unit */
if(status==flOK) /* Write BBT */
{
status = vol.flash->write(vol.flash,
unitBaseAddress(&vol,iUnit) + SECTOR_SIZE,
vol.physicalUnits,
vol.noOfUnits * sizeof(ANANDPhysUnit), EDC);
}
if(status==flOK) /* Write header */
{
status = vol.flash->write(vol.flash,
unitBaseAddress(&vol,iUnit),
nftlBuffer, sizeof (nftlBuffer), EDC);
}
if(status!=flOK)
{
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return status;
}
iUnit = vol.orgUnit;
}
}
/* Mark Binary partition with the proper signature */
if (!(formatParams->flags & FL_LEAVE_BINARY_AREA)&&
(vol.bootUnits > 0))
{
byte sign[BINARY_SIGNATURE_LEN];
/* Add SPL special Signature */
#ifdef WRITE_EXB_IMAGE
byte signOffset = 8;
tffscpy(sign,SIGN_SPL,BINARY_SIGNATURE_NAME);
#else
byte signOffset = formatParams->binaryPartitionInfo->signOffset;
tffscpy(sign,formatParams->binaryPartitionInfo->sign,
BINARY_SIGNATURE_NAME);
#endif /* WRITE_EXB_IMAGE */
tffsset(sign+BINARY_SIGNATURE_NAME,'F',BINARY_SIGNATURE_NAME);
unitSize = 1L << vol.unitSizeBits;
for (iUnit=0;iUnit<vol.bootUnits;iUnit++)
{
if ( vol.physicalUnits[iUnit] == ANAND_UNIT_FREE )
{
status = formatUnit(&vol,iUnit);
if(status != flOK)
break;
#ifdef WRITE_EXB_IMAGE
if (iUnit == formatParams->exbLen)
{
signOffset = formatParams->binaryPartitionInfo->signOffset;
tffscpy(sign,formatParams->binaryPartitionInfo->sign,
BINARY_SIGNATURE_NAME);
}
#endif /* WRITE_EXB_IMAGE */
/* Each logical unit might contain several physical blocks */
for (noOfBootUnits = 0 ;
(noOfBootUnits < unitSize) && (status == flOK) ;
noOfBootUnits += (ANANDUnitNo)vol.flash->erasableBlockSize)
{
status = vol.flash->write(vol.flash, unitBaseAddress(&vol,iUnit) +
noOfBootUnits + signOffset, sign,
BINARY_SIGNATURE_LEN,EXTRA);
}
if(status != flOK)
break;
}
#ifdef WRITE_EXB_IMAGE
else
{
formatParams->exbLen++;
}
#endif /* WRITE_EXB_IMAGE */
}
}
else /* Erase previous Original and SpareOriginal Unit */
{
for (iUnit = prevOrgUnit; iUnit < vol.orgUnit; iUnit++)
if( vol.physicalUnits[iUnit] != UNIT_BAD_ORIGINAL )
formatUnit(&vol,iUnit);
}
if (status != flOK)
{
DEBUG_PRINT(("Debug: NFTL failed while formating the binary partition.\r\n"));
}
else
{
DEBUG_PRINT(("Debug: finished NFTL format.\r\n"));
}
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return status;
}
#endif /* FORMAT_VOLUME */
/*----------------------------------------------------------------------*/
/* N F T L I n f o */
/* */
/* get NFTL information. */
/* */
/* Parameters: */
/* volNo : Volume serial no. */
/* tlInfo : Address of TLInfo record */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus NFTLInfo(Anand vol, TLInfo *tlInfo)
{
tlInfo->sectorsInVolume = vol.virtualSectors;
tlInfo->bootAreaSize = (unsigned long)vol.bootUnits << vol.unitSizeBits;
tlInfo->eraseCycles = vol.eraseSum;
tlInfo->tlUnitBits = vol.unitSizeBits;
return flOK;
}
#ifndef NO_READ_BBT_CODE
/*----------------------------------------------------------------------*/
/* r e a d B B T */
/* */
/* Returns a pointer to the BBT of the device. */
/* Note: Bad unit are marked with a 4 bytes address of the unit. */
/* Note: A unit can contain several blocks */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* buf : pointer to buffer to read into */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/* noOfBB : returns the number of bad unit of the media */
/* meidaSize : returns the media size in bytes */
/*----------------------------------------------------------------------*/
static FLStatus readBBT(Anand vol, CardAddress FAR1 * buf,
long FAR2 * mediaSize, unsigned FAR2 * noOfBB)
{
ANANDUnitNo iUnit;
ANANDUnitNo maxBad = vol.noOfUnits * ANAND_BAD_PERCENTAGE / 100;
CardAddress FAR1* ptr = (CardAddress FAR1*) buf;
*noOfBB = 0;
for (iUnit=0;(iUnit<vol.noOfUnits);iUnit++)
{
if (vol.physicalUnits[iUnit] == UNIT_BAD_MOUNT)
{
if (*noOfBB <= maxBad)
{
*ptr = (CardAddress) iUnit << vol.unitSizeBits;
(*noOfBB)++;
ptr = (CardAddress FAR1*)flAddLongToFarPointer((byte FAR1 *)ptr,
sizeof(CardAddress));
}
else
{
DEBUG_PRINT(("Debug: ERROR to many bad blocks.\r\n"));
return flVolumeTooSmall;
}
}
}
*mediaSize = vol.noOfUnits << vol.unitSizeBits;
return flOK;
}
#endif /* NO_READ_BBT_CODE */
/*----------------------------------------------------------------------*/
/* m o u n t N F T L */
/* */
/* Mount the volume. Initialize data structures and conversion tables */
/* */
/* Parameters: */
/* volNo : Volume serial no. */
/* tl : Mounted translation layer on exit */
/* flash : Flash media mounted on this socket */
/* volForCallback : Pointer to FLFlash structure for power on */
/* callback routine. */
/* */
/* update the tlType field of the TL record to NFTL */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus mountNFTL(unsigned volNo, TL *tl, FLFlash *flash, FLFlash **volForCallback)
{
Anand vol = &vols[volNo];
ANANDUnitNo iUnit,virUnit,nextUnit;
unsigned long currEraseCount=0;
ANANDBootRecord bootRecord,spareBootRecord;
FLStatus status;
#ifdef NFTL_CACHE
unsigned long scacheSize = 0;
#endif /* NFTL_CACHE */
#ifdef EXTRA_LARGE
int moreUnitBits;
#endif /* EXTRA_LARGE */
#if (defined(VERIFY_WRITE) || defined(VERIFY_ERASED_SECTOR))
/* Default for NFTL is FL_UPS */
flVerifyWrite[vol.socketNo][tl->partitionNo] = FL_UPS;
#endif /* VERIFY_WRITE || VERIFY_ERASED_SECTOR */
tffsset(&bootRecord,0,sizeof(ANANDBootRecord));
DEBUG_PRINT(("Debug: starting NFTL mount.\r\n"));
checkStatus(initNFTL(&vol,flash));
*volForCallback = vol.flash;
vol.eraseSum = 0;
/* Find the medium boot record */
for (vol.orgUnit = 0; vol.orgUnit < vol.noOfUnits; vol.orgUnit++) {
vol.flash->read(vol.flash,
unitBaseAddress(&vol,vol.orgUnit),
&bootRecord,
sizeof bootRecord,
0);
if (tffscmp(bootRecord.bootRecordId,"ANAND",sizeof bootRecord.bootRecordId) == 0)
break;
}
if (vol.orgUnit >= vol.noOfUnits) {
DEBUG_PRINT(("Debug: not NFTL format.\r\n"));
return flUnknownMedia;
}
for (vol.spareOrgUnit = vol.orgUnit + 1;
vol.spareOrgUnit < vol.noOfUnits;
vol.spareOrgUnit++) {
vol.flash->read(vol.flash,
unitBaseAddress(&vol,vol.spareOrgUnit),
&spareBootRecord,
sizeof spareBootRecord,
0);
if (tffscmp(spareBootRecord.bootRecordId,"ANAND",sizeof spareBootRecord.bootRecordId) == 0)
break;
}
if (vol.spareOrgUnit >= vol.noOfUnits)
vol.spareOrgUnit = ANAND_NO_UNIT;
/* Get media information from unit header */
vol.noOfUnits = LE2(bootRecord.noOfUnits);
vol.bootUnits = LE2(bootRecord.bootUnits);
vol.virtualSectors = (SectorNo)(UNAL4(bootRecord.virtualMediumSize) >> SECTOR_SIZE_BITS);
vol.noOfUnits += vol.bootUnits;
#ifdef EXTRA_LARGE
moreUnitBits = ~bootRecord.anandFlags & MORE_UNIT_BITS_MASK;
if (moreUnitBits > 0) {
vol.unitSizeBits += moreUnitBits;
vol.orgUnit >>= moreUnitBits;
if (vol.spareOrgUnit != ANAND_NO_UNIT)
vol.spareOrgUnit >>= moreUnitBits;
}
#endif /* EXTRA_LARGE */
vol.unitOffsetMask = (1L << vol.unitSizeBits) - 1;
vol.sectorsPerUnit = 1 << (vol.unitSizeBits - SECTOR_SIZE_BITS);
vol.noOfVirtualUnits = (ANANDUnitNo)((vol.virtualSectors + vol.sectorsPerUnit - 1) / vol.sectorsPerUnit);
if(((ANANDUnitNo)(vol.virtualSectors >> (vol.unitSizeBits - SECTOR_SIZE_BITS)) >
(vol.noOfUnits - vol.bootUnits)) ) {
if( vol.spareOrgUnit != ANAND_NO_UNIT ) {
vol.noOfUnits = LE2(spareBootRecord.noOfUnits);
vol.bootUnits = LE2(spareBootRecord.bootUnits);
vol.virtualSectors = (SectorNo)(UNAL4(spareBootRecord.virtualMediumSize) >> SECTOR_SIZE_BITS);
vol.noOfUnits += vol.bootUnits;
#ifdef EXTRA_LARGE
moreUnitBits = ~spareBootRecord.anandFlags & MORE_UNIT_BITS_MASK;
if (moreUnitBits > 0) {
vol.unitSizeBits += moreUnitBits;
vol.orgUnit >>= moreUnitBits;
if (vol.spareOrgUnit != ANAND_NO_UNIT)
vol.spareOrgUnit >>= moreUnitBits;
}
#endif /* EXTRA_LARGE */
vol.unitOffsetMask = (1L << vol.unitSizeBits) - 1;
vol.sectorsPerUnit = 1 << (vol.unitSizeBits - SECTOR_SIZE_BITS);
vol.noOfVirtualUnits = (ANANDUnitNo)((vol.virtualSectors + vol.sectorsPerUnit - 1) / vol.sectorsPerUnit);
if ((ANANDUnitNo)(vol.virtualSectors >> (vol.unitSizeBits - SECTOR_SIZE_BITS)) >
(vol.noOfUnits - vol.bootUnits))
return flBadFormat;
}
else
return flBadFormat;
}
checkStatus(initTables(&vol));
/* Read bad unit table from boot record */
status = vol.flash->read(vol.flash,
unitBaseAddress(&vol,vol.orgUnit) + SECTOR_SIZE,
vol.physicalUnits,
vol.noOfUnits * sizeof(ANANDPhysUnit),
EDC);
if( status != flOK ) {
if( vol.spareOrgUnit != ANAND_NO_UNIT ) {
status = vol.flash->read(vol.flash,
unitBaseAddress(&vol,vol.spareOrgUnit) + SECTOR_SIZE,
vol.physicalUnits,
vol.noOfUnits * sizeof(ANANDPhysUnit),
EDC);
if( status != flOK ) {
dismountNFTL(&vol); /* Free tables must be done after call to initTables */
return status;
}
}
else
return status;
}
/* Exclude boot-image units */
for (iUnit = 0; iUnit < vol.noOfVirtualUnits; iUnit++)
vol.virtualUnits[iUnit] = ANAND_NO_UNIT;
/* Translate bad unit table to internal representation */
for (iUnit = 0; iUnit < vol.noOfUnits; iUnit++) {
/* Exclude bad & protected units */
if (iUnit < vol.bootUnits || iUnit == vol.orgUnit || iUnit == vol.spareOrgUnit ||
vol.physicalUnits[iUnit] != ANAND_UNIT_FREE) {
if (vol.physicalUnits[iUnit] != ANAND_UNIT_FREE) {
vol.physicalUnits[iUnit] = UNIT_BAD_MOUNT;
}
else {
vol.physicalUnits[iUnit] = UNIT_UNAVAIL;
}
}
}
/* Mount all units */
for (iUnit = 0; iUnit < vol.noOfUnits; iUnit++) {
if ((vol.physicalUnits[iUnit] != UNIT_UNAVAIL) && (vol.physicalUnits[iUnit] != UNIT_BAD_MOUNT)) {
status = mountUnit(&vol,iUnit,&currEraseCount);
if(status!=flOK) {
dismountNFTL(&vol); /*Free tables must be done after call to initTables*/
return status;
}
vol.eraseSum+=currEraseCount;
}
}
/* Scan for orphan units, and count free units */
vol.freeUnits = 0;
for (iUnit = vol.bootUnits; iUnit < vol.noOfUnits; iUnit++) {
ANANDPhysUnit FAR1 *pU = &vol.physicalUnits[iUnit];
if (*pU == UNIT_ORPHAN ||
*pU == (UNIT_REPLACED | UNIT_ORPHAN)) {
formatChain(&vol,iUnit); /* Get rid of orphan */
if(iUnit == vol.invalidReplacement)
vol.invalidReplacement = ANAND_NO_UNIT;
}
else
if (*pU == (ANAND_UNIT_FREE & ~UNIT_ORPHAN))
*pU = ANAND_UNIT_FREE; /* Reference to free unit. That's OK */
}
/* Calculate Free Units again after formatChain */
vol.freeUnits = 0;
for (iUnit = vol.bootUnits; iUnit < vol.noOfUnits; iUnit++) {
if( vol.physicalUnits[iUnit] == ANAND_UNIT_FREE )
vol.freeUnits++;
}
/* Initialize allocation rover */
vol.roverUnit = vol.bootUnits;
/* Initialize statistics */
vol.sectorsRead = vol.sectorsWritten = vol.sectorsDeleted = 0;
vol.parasiteWrites = vol.unitsFolded = 0;
#ifndef FL_READ_ONLY
/*
* Make sure no unit chain with an invalid replacemenet unit
* pointer on the last unit
*/
if(vol.invalidReplacement != ANAND_NO_UNIT)
{
getUnitData(&vol,vol.invalidReplacement,&virUnit,&nextUnit);
virUnit = virUnit&(~ANAND_REPLACING_UNIT);
if(virUnit >= vol.noOfVirtualUnits)
{
DEBUG_PRINT(("ERROR - a bad unit header encountered.\r\n"));
dismountNFTL(&vol);
return flBadFormat;
}
iUnit = vol.virtualUnits[virUnit];
if(iUnit >= vol.noOfUnits)
{
DEBUG_PRINT(("ERROR - a bad unit header encountered.\r\n"));
dismountNFTL(&vol);
return flBadFormat;
}
setUnavail(iUnit);
checkStatus(foldUnit(&vol,virUnit,TRUE));
}
/* Make sure there is at least 1 free unit */
if(vol.freeUnits == 0)
foldBestChain(&vol,&iUnit); /* make free units by folding the best chain */
#endif /* FL_READ_ONLY */
/* Set TL routine */
tl->rec = &vol;
tl->mapSector = mapSector;
#ifndef FL_READ_ONLY
tl->writeSector = writeSector;
tl->deleteSector = deleteSector;
#ifdef DEFRAGMENT_VOLUME
tl->defragment = defragment;
#endif
#if (defined(VERIFY_WRITE) || defined (VERIFY_VOLUME) || defined(VERIFY_ERASED_SECTOR))
tl->checkVolume = checkVolume;
#endif /* VERIFY_WRITE || VERIFY_VOLUME || VERIFY_ERASED_SECTOR */
#endif /* FL_READ_ONLY */
tl->sectorsInVolume = sectorsInVolume;
tl->getTLInfo = NFTLInfo;
tl->tlSetBusy = tlSetBusy;
tl->dismount = dismountNFTL;
#ifndef NO_READ_BBT_CODE
tl->readBBT = readBBT;
#endif /* NO_READ_BBT_CODE */
tl->writeMultiSector = NULL;
tl->readSectors = NULL;
DEBUG_PRINT(("Debug: finished NFTL mount.\r\n"));
#ifdef NFTL_CACHE
/* create and initialize ANANDUnitHeader cache */
#ifdef ENVIRONMENT_VARS
if( flUseNFTLCache == 1 ) /* behave according to the value of env variable */
#endif
{
#ifdef FL_MALLOC
vol.ucache = (ucacheEntry FAR1*) FL_FAR_MALLOC (vol.noOfUnits * sizeof(ucacheEntry));
#else
vol.ucache = vol.ucacheBuf;
#endif /* FL_MALLOC */
}
#ifdef ENVIRONMENT_VARS
else
vol.ucache = NULL;
#endif
if (vol.ucache != NULL) {
for (iUnit = 0; iUnit < vol.noOfUnits; iUnit++) {
vol.ucache[iUnit].virtualUnitNo = 0xDEAD;
vol.ucache[iUnit].replacementUnitNo = 0xDEAD;
}
}
else {
DEBUG_PRINT(("Debug: NFTL runs without U-cache\r\n"));
}
/* create and initialize SectorFlags cache */
#ifdef ENVIRONMENT_VARS
if( flUseNFTLCache == 1 ) /* behave according to the value of env variable */
#endif
{
scacheSize = (unsigned long)vol.noOfUnits << (vol.unitSizeBits - SECTOR_SIZE_BITS - 2);
#ifdef FL_MALLOC
if( (sizeof(unsigned) < sizeof(scacheSize)) &&
(scacheSize >= 0x10000L) ) /* Out of Segment Boundary */
vol.scache = NULL;
else
vol.scache = (unsigned char FAR1*) FL_FAR_MALLOC (scacheSize);
#else
vol.scache = vol.scacheBuf;
#endif /* FL_MALLOC */
}
#ifdef ENVIRONMENT_VARS
else
vol.scache = NULL;
#endif
if (vol.scache != NULL) {
/*
* Whenever SECTOR_IGNORE is found in Sector Flags cache it is double
* checked by reading actual sector flags from flash-> This is way
* all the cache entries are initially set to SECTOR_IGNORE.
*/
unsigned char val = (S_CACHE_SECTOR_IGNORE << 6) | (S_CACHE_SECTOR_IGNORE << 4) |
(S_CACHE_SECTOR_IGNORE << 2) | S_CACHE_SECTOR_IGNORE;
unsigned long iC;
for(iC=0;( iC < scacheSize );iC++)
vol.scache[iC] = val;
}
else {
DEBUG_PRINT(("Debug: NFTL runs without S-cache\r\n"));
}
#endif /* NFTL_CACHE */
vol.badFormat = FALSE;
vol.wearLevel.alarm = (unsigned char)(vol.eraseSum % WLnow);
vol.wearLevel.currUnit = (ANANDUnitNo)(vol.eraseSum % vol.noOfVirtualUnits);
return flOK;
}
/*----------------------------------------------------------------------*/
/* f l R e g i s t e r N F T L */
/* */
/* Register this translation layer */
/* */
/* Parameters: */
/* None */
/* */
/* Returns: */
/* FLStatus : 0 on success, otherwise failure */
/*----------------------------------------------------------------------*/
FLStatus flRegisterNFTL(void)
{
#ifdef FL_MALLOC
unsigned i;
#endif
if (noOfTLs >= TLS)
return flTooManyComponents;
tlTable[noOfTLs].mountRoutine = mountNFTL;
#ifdef FORMAT_VOLUME
tlTable[noOfTLs].formatRoutine = formatNFTL;
#else
tlTable[noOfTLs].formatRoutine = noFormat;
#endif
noOfTLs++;
#ifdef FL_MALLOC
for(i=0;( i < VOLUMES );i++) {
vols[i].physicalUnits = NULL;
vols[i].virtualUnits = NULL;
#ifdef NFTL_CACHE
vols[i].ucache = NULL;
vols[i].scache = NULL;
#endif /* NFTL_CACHE */
}
#endif /* FL_MALLOC */
return flOK;
}
#ifndef FL_READ_ONLY
/*----------------------------------------------------------------------*/
/* m a r k A s I g n o r e d */
/* */
/* Mark sector at given address as ignored. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* addr : Physical address of the sector */
/* */
/*----------------------------------------------------------------------*/
static void markAsIgnored(Anand vol,CardAddress addr)
{
#ifndef RAM_MTD
static const
#endif /* RAM_MTD */
byte sectorFlags[2] = {SECTOR_IGNORE,SECTOR_IGNORE};
DEBUG_PRINT(("markAsIgnored : A sector is being marked as ignored\r\n"));
/* Force remapping of internal catched sector */
vol.flash->socket->remapped = TRUE;
#ifdef NFTL_CACHE
setSectorFlagsCache(&vol, addr, SECTOR_IGNORE);
#endif /* NFTL_CACHE */
vol.flash->write(vol.flash,addr+SECTOR_DATA_OFFSET,sectorFlags,sizeof(sectorFlags),EXTRA);
#if MAKE_SURE_IGNORE_HAS_BAD_EDC
/* Force remapping of internal catched sector */
vol.flash->socket->remapped = TRUE;
/* Make sure EDC is wrong - a slite problem with PPP */
if(vol.flash->read(vol.flash,addr,nftlBuffer,sizeof(nftlBuffer),EDC)==flOK)
{
tffsset(nftlBuffer,0,sizeof(nftlBuffer));
vol.flash->write(vol.flash,addr,nftlBuffer,sizeof(nftlBuffer),0);
#if (defined(VERIFY_WRITE) || defined (VERIFY_VOLUME) || defined(VERIFY_ERASED_SECTOR))
/* Set all ff's for verifySector routine */
tffsset(nftlBuffer,0xff,sizeof(nftlBuffer));
#endif /* VERIFY_WRITE || VERIFY_VOLUME || VERIFY_ERASED_SECTOR */
}
#endif /* MAKE_SURE_IGNORE_HAS_BAD_EDC */
}
#if (defined(VERIFY_WRITE) || defined (VERIFY_VOLUME) || defined(VERIFY_ERASED_SECTOR))
/*----------------------------------------------------------------------*/
/* v e r i f y S e c t o r s */
/* */
/* Verify sectors for power failures simptoms and fix if neccesary. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* sectorCount : No of sectors to verify */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
FLStatus verifySectors(Anand vol, dword sectorCount)
{
FLStatus status;
ANANDUnitNo virUnitNo;
ANANDUnitNo unitNo;
dword curRead;
CardAddress unitOffset;
CardAddress startSectorAddress;
CardAddress sourceSectorAddress;
CardAddress nextFreeSectorAddress;
byte index,sectorFlags;
byte FAR1* buffer;
if (vol.verifiedSectorNo >= vol.virtualSectors)
return flOK;
/* Initialize variables */
buffer = flReadBackBufferOf(vol.socketNo);
if(buffer==NULL)
{
DEBUG_PRINT(("\nDebug : Can not verify sectors since no buffer was allocated\r\n"));
return flOK;
}
virUnitNo = (ANANDUnitNo)(vol.verifiedSectorNo / vol.sectorsPerUnit);
sectorCount = TFFSMIN(vol.virtualSectors - vol.verifiedSectorNo,sectorCount);
/* Force remapping of internal catched sector */
vol.flash->socket->remapped = TRUE;
tffsset(nftlBuffer,0xff,sizeof(nftlBuffer));
/* Run over required number of virtual sectors */
for (; sectorCount > 0 ; virUnitNo++ ,sectorCount -= curRead)
{
/* Calculate needed number of sector in this unit */
unitOffset = (word)((vol.verifiedSectorNo % vol.sectorsPerUnit) << SECTOR_SIZE_BITS);
curRead = TFFSMIN(sectorCount,((1UL<<vol.unitSizeBits)-unitOffset)>>SECTOR_SIZE_BITS);
unitNo = vol.virtualUnits[virUnitNo];
if(unitNo == ANAND_NO_UNIT) /* Unit is empty */
{
vol.verifiedSectorNo += ((1<<vol.unitSizeBits)-unitOffset)>>SECTOR_SIZE_BITS;
continue;
}
/* Check all sector of unit or until required sectors */
startSectorAddress = unitBaseAddress(&vol,unitNo)+unitOffset;
for (index = 0 ; index < curRead ;
index++, vol.verifiedSectorNo++)
{
nextFreeSectorAddress = ANAND_UNASSIGNED_ADDRESS; /* Search end addr */
sourceSectorAddress = virtual2Physical(&vol,
vol.verifiedSectorNo,
&nextFreeSectorAddress);
if(sourceSectorAddress == ANAND_UNASSIGNED_ADDRESS) /* No written sector */
sourceSectorAddress = startSectorAddress +
((CardAddress)index << SECTOR_SIZE_BITS);
sectorFlags = getSectorFlags(&vol,sourceSectorAddress);
if(sectorFlags == SECTOR_FREE)
{
checkStatus(vol.flash->read(vol.flash,sourceSectorAddress,buffer,SECTOR_SIZE,0));
if (tffscmp(nftlBuffer,buffer,SECTOR_SIZE)!=0)
markAsIgnored(&vol,sourceSectorAddress);
continue;
}
else /* Used sector */
{
status = vol.flash->read(vol.flash,sourceSectorAddress,buffer,SECTOR_SIZE,EDC);
switch (status)
{
case flDataError:
markAsIgnored(&vol,sourceSectorAddress);
createUnitCount(&vol,virUnitNo);
break; /* Mark as ignored */
case flOK:
break; /* Sector OK */
default:
return status; /* Report error */
}
}
/* Check the next free sector to make sure it is erased */
if(nextFreeSectorAddress != ANAND_UNASSIGNED_ADDRESS)
{
checkStatus(vol.flash->read(vol.flash,nextFreeSectorAddress,buffer,SECTOR_SIZE,0));
if (tffscmp(nftlBuffer,buffer,SECTOR_SIZE)!=0)
markAsIgnored(&vol,nextFreeSectorAddress);
}
} /* Loop over all sector of unit or until required sectors */
} /* Loop over all required sectors */
return flOK;
}
/*----------------------------------------------------------------------*/
/* c h e c k V o l u m e */
/* */
/* Scanthe entire media for partialy written sectors. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus checkVolume(Anand vol)
{
return verifySectors(&vol, 0xffffffff);
}
#endif /* VERIFY_WRITE || VERIFY_VOLUME || VERIFY_ERASED_SECTOR */
/*----------------------------------------------------------------------*/
/* c h e c k F o l d i n g */
/* */
/* Check folding status and if needed fold again. */
/* */
/* Parameters: */
/* vol : Pointer identifying drive */
/* virtualUnitNo : Virtual unit number to re-fold */
/* */
/* Returns: */
/* FLStatus : 0 on success, failed otherwise */
/*----------------------------------------------------------------------*/
static FLStatus checkFolding(Anand vol, ANANDUnitNo virtualUnitNo)
{
ANANDUnitNo tmp;
if(vol.freeUnits == 0)
checkStatus(foldBestChain(&vol, &tmp));
return foldUnit(&vol,virtualUnitNo,TRUE);
}
#endif /* FL_READ_ONLY */
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