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author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-06-20 20:46:21 -0400 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-06-20 20:46:21 -0400 |
commit | 70ac4385a13f78bc478f26d317511893741b05bd (patch) | |
tree | dafc7f3018295fc4ee00339889e4f35d5b9d7743 /drivers/mtd/nftlcore.c | |
parent | d59bf96cdde5b874a57bfd1425faa45da915d0b7 (diff) | |
parent | 077e98945db7e54a9865b5f29a1f02f531eca414 (diff) | |
download | kernel_samsung_smdk4412-70ac4385a13f78bc478f26d317511893741b05bd.zip kernel_samsung_smdk4412-70ac4385a13f78bc478f26d317511893741b05bd.tar.gz kernel_samsung_smdk4412-70ac4385a13f78bc478f26d317511893741b05bd.tar.bz2 |
Merge branch 'master' of /home/trondmy/kernel/linux-2.6/
Conflicts:
include/linux/nfs_fs.h
Fixed up conflict with kernel header updates.
Diffstat (limited to 'drivers/mtd/nftlcore.c')
-rw-r--r-- | drivers/mtd/nftlcore.c | 221 |
1 files changed, 144 insertions, 77 deletions
diff --git a/drivers/mtd/nftlcore.c b/drivers/mtd/nftlcore.c index d7cd5fa..dc75735 100644 --- a/drivers/mtd/nftlcore.c +++ b/drivers/mtd/nftlcore.c @@ -70,8 +70,6 @@ static void nftl_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd) nftl->mbd.devnum = -1; nftl->mbd.blksize = 512; nftl->mbd.tr = tr; - memcpy(&nftl->oobinfo, &mtd->oobinfo, sizeof(struct nand_oobinfo)); - nftl->oobinfo.useecc = MTD_NANDECC_PLACEONLY; if (NFTL_mount(nftl) < 0) { printk(KERN_WARNING "NFTL: could not mount device\n"); @@ -136,6 +134,69 @@ static void nftl_remove_dev(struct mtd_blktrans_dev *dev) kfree(nftl); } +/* + * Read oob data from flash + */ +int nftl_read_oob(struct mtd_info *mtd, loff_t offs, size_t len, + size_t *retlen, uint8_t *buf) +{ + struct mtd_oob_ops ops; + int res; + + ops.mode = MTD_OOB_PLACE; + ops.ooboffs = offs & (mtd->writesize - 1); + ops.ooblen = len; + ops.oobbuf = buf; + ops.datbuf = NULL; + ops.len = len; + + res = mtd->read_oob(mtd, offs & ~(mtd->writesize - 1), &ops); + *retlen = ops.retlen; + return res; +} + +/* + * Write oob data to flash + */ +int nftl_write_oob(struct mtd_info *mtd, loff_t offs, size_t len, + size_t *retlen, uint8_t *buf) +{ + struct mtd_oob_ops ops; + int res; + + ops.mode = MTD_OOB_PLACE; + ops.ooboffs = offs & (mtd->writesize - 1); + ops.ooblen = len; + ops.oobbuf = buf; + ops.datbuf = NULL; + ops.len = len; + + res = mtd->write_oob(mtd, offs & ~(mtd->writesize - 1), &ops); + *retlen = ops.retlen; + return res; +} + +/* + * Write data and oob to flash + */ +static int nftl_write(struct mtd_info *mtd, loff_t offs, size_t len, + size_t *retlen, uint8_t *buf, uint8_t *oob) +{ + struct mtd_oob_ops ops; + int res; + + ops.mode = MTD_OOB_PLACE; + ops.ooboffs = offs; + ops.ooblen = mtd->oobsize; + ops.oobbuf = oob; + ops.datbuf = buf; + ops.len = len; + + res = mtd->write_oob(mtd, offs & ~(mtd->writesize - 1), &ops); + *retlen = ops.retlen; + return res; +} + #ifdef CONFIG_NFTL_RW /* Actual NFTL access routines */ @@ -185,6 +246,7 @@ static u16 NFTL_findfreeblock(struct NFTLrecord *nftl, int desperate ) static u16 NFTL_foldchain (struct NFTLrecord *nftl, unsigned thisVUC, unsigned pendingblock ) { + struct mtd_info *mtd = nftl->mbd.mtd; u16 BlockMap[MAX_SECTORS_PER_UNIT]; unsigned char BlockLastState[MAX_SECTORS_PER_UNIT]; unsigned char BlockFreeFound[MAX_SECTORS_PER_UNIT]; @@ -194,7 +256,7 @@ static u16 NFTL_foldchain (struct NFTLrecord *nftl, unsigned thisVUC, unsigned p unsigned int targetEUN; struct nftl_oob oob; int inplace = 1; - size_t retlen; + size_t retlen; memset(BlockMap, 0xff, sizeof(BlockMap)); memset(BlockFreeFound, 0, sizeof(BlockFreeFound)); @@ -210,21 +272,21 @@ static u16 NFTL_foldchain (struct NFTLrecord *nftl, unsigned thisVUC, unsigned p /* Scan to find the Erase Unit which holds the actual data for each 512-byte block within the Chain. */ - silly = MAX_LOOPS; + silly = MAX_LOOPS; targetEUN = BLOCK_NIL; while (thisEUN <= nftl->lastEUN ) { - unsigned int status, foldmark; + unsigned int status, foldmark; targetEUN = thisEUN; for (block = 0; block < nftl->EraseSize / 512; block ++) { - MTD_READOOB(nftl->mbd.mtd, - (thisEUN * nftl->EraseSize) + (block * 512), - 16 , &retlen, (char *)&oob); + nftl_read_oob(mtd, (thisEUN * nftl->EraseSize) + + (block * 512), 16 , &retlen, + (char *)&oob); if (block == 2) { - foldmark = oob.u.c.FoldMark | oob.u.c.FoldMark1; - if (foldmark == FOLD_MARK_IN_PROGRESS) { - DEBUG(MTD_DEBUG_LEVEL1, - "Write Inhibited on EUN %d\n", thisEUN); + foldmark = oob.u.c.FoldMark | oob.u.c.FoldMark1; + if (foldmark == FOLD_MARK_IN_PROGRESS) { + DEBUG(MTD_DEBUG_LEVEL1, + "Write Inhibited on EUN %d\n", thisEUN); inplace = 0; } else { /* There's no other reason not to do inplace, @@ -233,7 +295,7 @@ static u16 NFTL_foldchain (struct NFTLrecord *nftl, unsigned thisVUC, unsigned p inplace = 1; } } - status = oob.b.Status | oob.b.Status1; + status = oob.b.Status | oob.b.Status1; BlockLastState[block] = status; switch(status) { @@ -328,15 +390,15 @@ static u16 NFTL_foldchain (struct NFTLrecord *nftl, unsigned thisVUC, unsigned p return BLOCK_NIL; } } else { - /* We put a fold mark in the chain we are folding only if - we fold in place to help the mount check code. If we do - not fold in place, it is possible to find the valid - chain by selecting the longer one */ - oob.u.c.FoldMark = oob.u.c.FoldMark1 = cpu_to_le16(FOLD_MARK_IN_PROGRESS); - oob.u.c.unused = 0xffffffff; - MTD_WRITEOOB(nftl->mbd.mtd, (nftl->EraseSize * targetEUN) + 2 * 512 + 8, - 8, &retlen, (char *)&oob.u); - } + /* We put a fold mark in the chain we are folding only if we + fold in place to help the mount check code. If we do not fold in + place, it is possible to find the valid chain by selecting the + longer one */ + oob.u.c.FoldMark = oob.u.c.FoldMark1 = cpu_to_le16(FOLD_MARK_IN_PROGRESS); + oob.u.c.unused = 0xffffffff; + nftl_write_oob(mtd, (nftl->EraseSize * targetEUN) + 2 * 512 + 8, + 8, &retlen, (char *)&oob.u); + } /* OK. We now know the location of every block in the Virtual Unit Chain, and the Erase Unit into which we are supposed to be copying. @@ -353,33 +415,33 @@ static u16 NFTL_foldchain (struct NFTLrecord *nftl, unsigned thisVUC, unsigned p continue; } - /* copy only in non free block (free blocks can only + /* copy only in non free block (free blocks can only happen in case of media errors or deleted blocks) */ - if (BlockMap[block] == BLOCK_NIL) - continue; - - ret = MTD_READ(nftl->mbd.mtd, (nftl->EraseSize * BlockMap[block]) + (block * 512), - 512, &retlen, movebuf); - if (ret < 0) { - ret = MTD_READ(nftl->mbd.mtd, (nftl->EraseSize * BlockMap[block]) - + (block * 512), 512, &retlen, - movebuf); - if (ret != -EIO) - printk("Error went away on retry.\n"); - } + if (BlockMap[block] == BLOCK_NIL) + continue; + + ret = mtd->read(mtd, (nftl->EraseSize * BlockMap[block]) + (block * 512), + 512, &retlen, movebuf); + if (ret < 0 && ret != -EUCLEAN) { + ret = mtd->read(mtd, (nftl->EraseSize * BlockMap[block]) + + (block * 512), 512, &retlen, + movebuf); + if (ret != -EIO) + printk("Error went away on retry.\n"); + } memset(&oob, 0xff, sizeof(struct nftl_oob)); oob.b.Status = oob.b.Status1 = SECTOR_USED; - MTD_WRITEECC(nftl->mbd.mtd, (nftl->EraseSize * targetEUN) + (block * 512), - 512, &retlen, movebuf, (char *)&oob, &nftl->oobinfo); + + nftl_write(nftl->mbd.mtd, (nftl->EraseSize * targetEUN) + + (block * 512), 512, &retlen, movebuf, (char *)&oob); } - /* add the header so that it is now a valid chain */ - oob.u.a.VirtUnitNum = oob.u.a.SpareVirtUnitNum - = cpu_to_le16(thisVUC); - oob.u.a.ReplUnitNum = oob.u.a.SpareReplUnitNum = 0xffff; + /* add the header so that it is now a valid chain */ + oob.u.a.VirtUnitNum = oob.u.a.SpareVirtUnitNum = cpu_to_le16(thisVUC); + oob.u.a.ReplUnitNum = oob.u.a.SpareReplUnitNum = 0xffff; - MTD_WRITEOOB(nftl->mbd.mtd, (nftl->EraseSize * targetEUN) + 8, - 8, &retlen, (char *)&oob.u); + nftl_write_oob(mtd, (nftl->EraseSize * targetEUN) + 8, + 8, &retlen, (char *)&oob.u); /* OK. We've moved the whole lot into the new block. Now we have to free the original blocks. */ @@ -396,18 +458,18 @@ static u16 NFTL_foldchain (struct NFTLrecord *nftl, unsigned thisVUC, unsigned p while (thisEUN <= nftl->lastEUN && thisEUN != targetEUN) { unsigned int EUNtmp; - EUNtmp = nftl->ReplUnitTable[thisEUN]; + EUNtmp = nftl->ReplUnitTable[thisEUN]; - if (NFTL_formatblock(nftl, thisEUN) < 0) { + if (NFTL_formatblock(nftl, thisEUN) < 0) { /* could not erase : mark block as reserved */ nftl->ReplUnitTable[thisEUN] = BLOCK_RESERVED; - } else { + } else { /* correctly erased : mark it as free */ nftl->ReplUnitTable[thisEUN] = BLOCK_FREE; nftl->numfreeEUNs++; - } - thisEUN = EUNtmp; + } + thisEUN = EUNtmp; } /* Make this the new start of chain for thisVUC */ @@ -473,6 +535,7 @@ static inline u16 NFTL_findwriteunit(struct NFTLrecord *nftl, unsigned block) { u16 lastEUN; u16 thisVUC = block / (nftl->EraseSize / 512); + struct mtd_info *mtd = nftl->mbd.mtd; unsigned int writeEUN; unsigned long blockofs = (block * 512) & (nftl->EraseSize -1); size_t retlen; @@ -489,21 +552,22 @@ static inline u16 NFTL_findwriteunit(struct NFTLrecord *nftl, unsigned block) */ lastEUN = BLOCK_NIL; writeEUN = nftl->EUNtable[thisVUC]; - silly = MAX_LOOPS; + silly = MAX_LOOPS; while (writeEUN <= nftl->lastEUN) { struct nftl_bci bci; size_t retlen; - unsigned int status; + unsigned int status; lastEUN = writeEUN; - MTD_READOOB(nftl->mbd.mtd, (writeEUN * nftl->EraseSize) + blockofs, - 8, &retlen, (char *)&bci); + nftl_read_oob(mtd, + (writeEUN * nftl->EraseSize) + blockofs, + 8, &retlen, (char *)&bci); DEBUG(MTD_DEBUG_LEVEL2, "Status of block %d in EUN %d is %x\n", block , writeEUN, le16_to_cpu(bci.Status)); - status = bci.Status | bci.Status1; + status = bci.Status | bci.Status1; switch(status) { case SECTOR_FREE: return writeEUN; @@ -574,10 +638,10 @@ static inline u16 NFTL_findwriteunit(struct NFTLrecord *nftl, unsigned block) /* We've found a free block. Insert it into the chain. */ if (lastEUN != BLOCK_NIL) { - thisVUC |= 0x8000; /* It's a replacement block */ + thisVUC |= 0x8000; /* It's a replacement block */ } else { - /* The first block in a new chain */ - nftl->EUNtable[thisVUC] = writeEUN; + /* The first block in a new chain */ + nftl->EUNtable[thisVUC] = writeEUN; } /* set up the actual EUN we're writing into */ @@ -585,29 +649,29 @@ static inline u16 NFTL_findwriteunit(struct NFTLrecord *nftl, unsigned block) nftl->ReplUnitTable[writeEUN] = BLOCK_NIL; /* ... and on the flash itself */ - MTD_READOOB(nftl->mbd.mtd, writeEUN * nftl->EraseSize + 8, 8, - &retlen, (char *)&oob.u); + nftl_read_oob(mtd, writeEUN * nftl->EraseSize + 8, 8, + &retlen, (char *)&oob.u); oob.u.a.VirtUnitNum = oob.u.a.SpareVirtUnitNum = cpu_to_le16(thisVUC); - MTD_WRITEOOB(nftl->mbd.mtd, writeEUN * nftl->EraseSize + 8, 8, - &retlen, (char *)&oob.u); + nftl_write_oob(mtd, writeEUN * nftl->EraseSize + 8, 8, + &retlen, (char *)&oob.u); - /* we link the new block to the chain only after the + /* we link the new block to the chain only after the block is ready. It avoids the case where the chain could point to a free block */ - if (lastEUN != BLOCK_NIL) { + if (lastEUN != BLOCK_NIL) { /* Both in our cache... */ nftl->ReplUnitTable[lastEUN] = writeEUN; /* ... and on the flash itself */ - MTD_READOOB(nftl->mbd.mtd, (lastEUN * nftl->EraseSize) + 8, - 8, &retlen, (char *)&oob.u); + nftl_read_oob(mtd, (lastEUN * nftl->EraseSize) + 8, + 8, &retlen, (char *)&oob.u); oob.u.a.ReplUnitNum = oob.u.a.SpareReplUnitNum = cpu_to_le16(writeEUN); - MTD_WRITEOOB(nftl->mbd.mtd, (lastEUN * nftl->EraseSize) + 8, - 8, &retlen, (char *)&oob.u); + nftl_write_oob(mtd, (lastEUN * nftl->EraseSize) + 8, + 8, &retlen, (char *)&oob.u); } return writeEUN; @@ -639,10 +703,9 @@ static int nftl_writeblock(struct mtd_blktrans_dev *mbd, unsigned long block, memset(&oob, 0xff, sizeof(struct nftl_oob)); oob.b.Status = oob.b.Status1 = SECTOR_USED; - MTD_WRITEECC(nftl->mbd.mtd, (writeEUN * nftl->EraseSize) + blockofs, - 512, &retlen, (char *)buffer, (char *)&oob, &nftl->oobinfo); - /* need to write SECTOR_USED flags since they are not written in mtd_writeecc */ + nftl_write(nftl->mbd.mtd, (writeEUN * nftl->EraseSize) + blockofs, + 512, &retlen, (char *)buffer, (char *)&oob); return 0; } #endif /* CONFIG_NFTL_RW */ @@ -651,20 +714,22 @@ static int nftl_readblock(struct mtd_blktrans_dev *mbd, unsigned long block, char *buffer) { struct NFTLrecord *nftl = (void *)mbd; + struct mtd_info *mtd = nftl->mbd.mtd; u16 lastgoodEUN; u16 thisEUN = nftl->EUNtable[block / (nftl->EraseSize / 512)]; unsigned long blockofs = (block * 512) & (nftl->EraseSize - 1); - unsigned int status; + unsigned int status; int silly = MAX_LOOPS; - size_t retlen; - struct nftl_bci bci; + size_t retlen; + struct nftl_bci bci; lastgoodEUN = BLOCK_NIL; - if (thisEUN != BLOCK_NIL) { + if (thisEUN != BLOCK_NIL) { while (thisEUN < nftl->nb_blocks) { - if (MTD_READOOB(nftl->mbd.mtd, (thisEUN * nftl->EraseSize) + blockofs, - 8, &retlen, (char *)&bci) < 0) + if (nftl_read_oob(mtd, (thisEUN * nftl->EraseSize) + + blockofs, 8, &retlen, + (char *)&bci) < 0) status = SECTOR_IGNORE; else status = bci.Status | bci.Status1; @@ -694,7 +759,7 @@ static int nftl_readblock(struct mtd_blktrans_dev *mbd, unsigned long block, } thisEUN = nftl->ReplUnitTable[thisEUN]; } - } + } the_end: if (lastgoodEUN == BLOCK_NIL) { @@ -703,7 +768,9 @@ static int nftl_readblock(struct mtd_blktrans_dev *mbd, unsigned long block, } else { loff_t ptr = (lastgoodEUN * nftl->EraseSize) + blockofs; size_t retlen; - if (MTD_READ(nftl->mbd.mtd, ptr, 512, &retlen, buffer)) + int res = mtd->read(mtd, ptr, 512, &retlen, buffer); + + if (res < 0 && res != -EUCLEAN) return -EIO; } return 0; |