* (c) 1999 Machine Vision Holdings, Inc.
* Author: David Woodhouse <dwmw2@infradead.org>
*
- * $Id: inftlcore.c,v 1.19 2005/11/07 11:14:20 gleixner Exp $
- *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
struct INFTLrecord *inftl;
unsigned long temp;
- if (mtd->type != MTD_NANDFLASH)
+ if (mtd->type != MTD_NANDFLASH || mtd->size > UINT_MAX)
return;
/* OK, this is moderately ugly. But probably safe. Alternatives? */
if (memcmp(mtd->name, "DiskOnChip", 10))
DEBUG(MTD_DEBUG_LEVEL3, "INFTL: add_mtd for %s\n", mtd->name);
- inftl = kmalloc(sizeof(*inftl), GFP_KERNEL);
+ inftl = kzalloc(sizeof(*inftl), GFP_KERNEL);
if (!inftl) {
printk(KERN_WARNING "INFTL: Out of memory for data structures\n");
return;
}
- memset(inftl, 0, sizeof(*inftl));
inftl->mbd.mtd = mtd;
inftl->mbd.devnum = -1;
- inftl->mbd.blksize = 512;
+
inftl->mbd.tr = tr;
if (INFTL_mount(inftl) < 0) {
*/
/*
+ * Read oob data from flash
+ */
+int inftl_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;
+
+ res = mtd->read_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
+ *retlen = ops.oobretlen;
+ return res;
+}
+
+/*
+ * Write oob data to flash
+ */
+int inftl_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;
+
+ res = mtd->write_oob(mtd, offs & ~(mtd->writesize - 1), &ops);
+ *retlen = ops.oobretlen;
+ return res;
+}
+
+/*
+ * Write data and oob to flash
+ */
+static int inftl_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;
+}
+
+/*
* INFTL_findfreeblock: Find a free Erase Unit on the INFTL partition.
* This function is used when the give Virtual Unit Chain.
*/
if (!desperate && inftl->numfreeEUNs < 2) {
DEBUG(MTD_DEBUG_LEVEL1, "INFTL: there are too few free "
"EUNs (%d)\n", inftl->numfreeEUNs);
- return 0xffff;
+ return BLOCK_NIL;
}
/* Scan for a free block */
u16 BlockMap[MAX_SECTORS_PER_UNIT];
unsigned char BlockDeleted[MAX_SECTORS_PER_UNIT];
unsigned int thisEUN, prevEUN, status;
+ struct mtd_info *mtd = inftl->mbd.mtd;
int block, silly;
unsigned int targetEUN;
struct inftl_oob oob;
- size_t retlen;
+ size_t retlen;
DEBUG(MTD_DEBUG_LEVEL3, "INFTL: INFTL_foldchain(inftl=%p,thisVUC=%d,"
"pending=%d)\n", inftl, thisVUC, pendingblock);
silly = MAX_LOOPS;
while (thisEUN < inftl->nb_blocks) {
for (block = 0; block < inftl->EraseSize/SECTORSIZE; block ++) {
- if ((BlockMap[block] != 0xffff) || BlockDeleted[block])
+ if ((BlockMap[block] != BLOCK_NIL) ||
+ BlockDeleted[block])
continue;
- if (MTD_READOOB(inftl->mbd.mtd, (thisEUN * inftl->EraseSize)
- + (block * SECTORSIZE), 16 , &retlen,
- (char *)&oob) < 0)
+ if (inftl_read_oob(mtd, (thisEUN * inftl->EraseSize)
+ + (block * SECTORSIZE), 16, &retlen,
+ (char *)&oob) < 0)
status = SECTOR_IGNORE;
else
status = oob.b.Status | oob.b.Status1;
if (BlockMap[block] == BLOCK_NIL)
continue;
- ret = MTD_READ(inftl->mbd.mtd, (inftl->EraseSize *
- BlockMap[block]) + (block * SECTORSIZE), SECTORSIZE,
- &retlen, movebuf);
- if (ret < 0) {
- ret = MTD_READ(inftl->mbd.mtd, (inftl->EraseSize *
- BlockMap[block]) + (block * SECTORSIZE),
- SECTORSIZE, &retlen, movebuf);
+ ret = mtd->read(mtd, (inftl->EraseSize * BlockMap[block]) +
+ (block * SECTORSIZE), SECTORSIZE, &retlen,
+ movebuf);
+ if (ret < 0 && ret != -EUCLEAN) {
+ ret = mtd->read(mtd,
+ (inftl->EraseSize * BlockMap[block]) +
+ (block * SECTORSIZE), SECTORSIZE,
+ &retlen, movebuf);
if (ret != -EIO)
DEBUG(MTD_DEBUG_LEVEL1, "INFTL: error went "
"away on retry?\n");
memset(&oob, 0xff, sizeof(struct inftl_oob));
oob.b.Status = oob.b.Status1 = SECTOR_USED;
- nand_write_raw(inftl->mbd.mtd, (inftl->EraseSize * targetEUN) +
- (block * SECTORSIZE), SECTORSIZE, &retlen,
- movebuf, (char *)&oob);
+ inftl_write(inftl->mbd.mtd, (inftl->EraseSize * targetEUN) +
+ (block * SECTORSIZE), SECTORSIZE, &retlen,
+ movebuf, (char *)&oob);
}
/*
if (thisEUN == targetEUN)
break;
+ /* Unlink the last block from the chain. */
+ inftl->PUtable[prevEUN] = BLOCK_NIL;
+
+ /* Now try to erase it. */
if (INFTL_formatblock(inftl, thisEUN) < 0) {
/*
* Could not erase : mark block as reserved.
} else {
/* Correctly erased : mark it as free */
inftl->PUtable[thisEUN] = BLOCK_FREE;
- inftl->PUtable[prevEUN] = BLOCK_NIL;
inftl->numfreeEUNs++;
}
}
unsigned int thisVUC = block / (inftl->EraseSize / SECTORSIZE);
unsigned int thisEUN, writeEUN, prev_block, status;
unsigned long blockofs = (block * SECTORSIZE) & (inftl->EraseSize -1);
+ struct mtd_info *mtd = inftl->mbd.mtd;
struct inftl_oob oob;
struct inftl_bci bci;
unsigned char anac, nacs, parity;
silly = MAX_LOOPS;
while (thisEUN <= inftl->lastEUN) {
- MTD_READOOB(inftl->mbd.mtd, (thisEUN * inftl->EraseSize) +
- blockofs, 8, &retlen, (char *)&bci);
+ inftl_read_oob(mtd, (thisEUN * inftl->EraseSize) +
+ blockofs, 8, &retlen, (char *)&bci);
status = bci.Status | bci.Status1;
DEBUG(MTD_DEBUG_LEVEL3, "INFTL: status of block %d in "
if (!silly--) {
printk(KERN_WARNING "INFTL: infinite loop in "
"Virtual Unit Chain 0x%x\n", thisVUC);
- return 0xffff;
+ return BLOCK_NIL;
}
/* Skip to next block in chain */
* waiting to be picked up. We're going to have to fold
* a chain to make room.
*/
- thisEUN = INFTL_makefreeblock(inftl, 0xffff);
+ thisEUN = INFTL_makefreeblock(inftl, block);
/*
* Hopefully we free something, lets try again.
nacs = 0;
thisEUN = inftl->VUtable[thisVUC];
if (thisEUN != BLOCK_NIL) {
- MTD_READOOB(inftl->mbd.mtd, thisEUN * inftl->EraseSize
- + 8, 8, &retlen, (char *)&oob.u);
+ inftl_read_oob(mtd, thisEUN * inftl->EraseSize
+ + 8, 8, &retlen, (char *)&oob.u);
anac = oob.u.a.ANAC + 1;
nacs = oob.u.a.NACs + 1;
}
oob.u.a.parityPerField = parity;
oob.u.a.discarded = 0xaa;
- MTD_WRITEOOB(inftl->mbd.mtd, writeEUN * inftl->EraseSize + 8, 8,
- &retlen, (char *)&oob.u);
+ inftl_write_oob(mtd, writeEUN * inftl->EraseSize + 8, 8,
+ &retlen, (char *)&oob.u);
/* Also back up header... */
oob.u.b.virtualUnitNo = cpu_to_le16(thisVUC);
oob.u.b.parityPerField = parity;
oob.u.b.discarded = 0xaa;
- MTD_WRITEOOB(inftl->mbd.mtd, writeEUN * inftl->EraseSize +
- SECTORSIZE * 4 + 8, 8, &retlen, (char *)&oob.u);
+ inftl_write_oob(mtd, writeEUN * inftl->EraseSize +
+ SECTORSIZE * 4 + 8, 8, &retlen, (char *)&oob.u);
inftl->PUtable[writeEUN] = inftl->VUtable[thisVUC];
inftl->VUtable[thisVUC] = writeEUN;
printk(KERN_WARNING "INFTL: error folding to make room for Virtual "
"Unit Chain 0x%x\n", thisVUC);
- return 0xffff;
+ return BLOCK_NIL;
}
/*
*/
static void INFTL_trydeletechain(struct INFTLrecord *inftl, unsigned thisVUC)
{
+ struct mtd_info *mtd = inftl->mbd.mtd;
unsigned char BlockUsed[MAX_SECTORS_PER_UNIT];
unsigned char BlockDeleted[MAX_SECTORS_PER_UNIT];
unsigned int thisEUN, status;
if (BlockUsed[block] || BlockDeleted[block])
continue;
- if (MTD_READOOB(inftl->mbd.mtd, (thisEUN * inftl->EraseSize)
- + (block * SECTORSIZE), 8 , &retlen,
- (char *)&bci) < 0)
+ if (inftl_read_oob(mtd, (thisEUN * inftl->EraseSize)
+ + (block * SECTORSIZE), 8 , &retlen,
+ (char *)&bci) < 0)
status = SECTOR_IGNORE;
else
status = bci.Status | bci.Status1;
{
unsigned int thisEUN = inftl->VUtable[block / (inftl->EraseSize / SECTORSIZE)];
unsigned long blockofs = (block * SECTORSIZE) & (inftl->EraseSize - 1);
+ struct mtd_info *mtd = inftl->mbd.mtd;
unsigned int status;
int silly = MAX_LOOPS;
size_t retlen;
"block=%d)\n", inftl, block);
while (thisEUN < inftl->nb_blocks) {
- if (MTD_READOOB(inftl->mbd.mtd, (thisEUN * inftl->EraseSize) +
- blockofs, 8, &retlen, (char *)&bci) < 0)
+ if (inftl_read_oob(mtd, (thisEUN * inftl->EraseSize) +
+ blockofs, 8, &retlen, (char *)&bci) < 0)
status = SECTOR_IGNORE;
else
status = bci.Status | bci.Status1;
if (thisEUN != BLOCK_NIL) {
loff_t ptr = (thisEUN * inftl->EraseSize) + blockofs;
- if (MTD_READOOB(inftl->mbd.mtd, ptr, 8, &retlen, (char *)&bci) < 0)
+ if (inftl_read_oob(mtd, ptr, 8, &retlen, (char *)&bci) < 0)
return -EIO;
bci.Status = bci.Status1 = SECTOR_DELETED;
- if (MTD_WRITEOOB(inftl->mbd.mtd, ptr, 8, &retlen, (char *)&bci) < 0)
+ if (inftl_write_oob(mtd, ptr, 8, &retlen, (char *)&bci) < 0)
return -EIO;
INFTL_trydeletechain(inftl, block / (inftl->EraseSize / SECTORSIZE));
}
memset(&oob, 0xff, sizeof(struct inftl_oob));
oob.b.Status = oob.b.Status1 = SECTOR_USED;
- nand_write_raw(inftl->mbd.mtd, (writeEUN * inftl->EraseSize) +
- blockofs, SECTORSIZE, &retlen, (char *)buffer,
- (char *)&oob);
+ inftl_write(inftl->mbd.mtd, (writeEUN * inftl->EraseSize) +
+ blockofs, SECTORSIZE, &retlen, (char *)buffer,
+ (char *)&oob);
/*
* need to write SECTOR_USED flags since they are not written
* in mtd_writeecc
struct INFTLrecord *inftl = (void *)mbd;
unsigned int thisEUN = inftl->VUtable[block / (inftl->EraseSize / SECTORSIZE)];
unsigned long blockofs = (block * SECTORSIZE) & (inftl->EraseSize - 1);
+ struct mtd_info *mtd = inftl->mbd.mtd;
unsigned int status;
int silly = MAX_LOOPS;
struct inftl_bci bci;
"buffer=%p)\n", inftl, block, buffer);
while (thisEUN < inftl->nb_blocks) {
- if (MTD_READOOB(inftl->mbd.mtd, (thisEUN * inftl->EraseSize) +
- blockofs, 8, &retlen, (char *)&bci) < 0)
+ if (inftl_read_oob(mtd, (thisEUN * inftl->EraseSize) +
+ blockofs, 8, &retlen, (char *)&bci) < 0)
status = SECTOR_IGNORE;
else
status = bci.Status | bci.Status1;
} else {
size_t retlen;
loff_t ptr = (thisEUN * inftl->EraseSize) + blockofs;
- if (MTD_READ(inftl->mbd.mtd, ptr, SECTORSIZE, &retlen,
- buffer))
+ int ret = mtd->read(mtd, ptr, SECTORSIZE, &retlen, buffer);
+
+ /* Handle corrected bit flips gracefully */
+ if (ret < 0 && ret != -EUCLEAN)
return -EIO;
}
return 0;
.name = "inftl",
.major = INFTL_MAJOR,
.part_bits = INFTL_PARTN_BITS,
+ .blksize = 512,
.getgeo = inftl_getgeo,
.readsect = inftl_readblock,
.writesect = inftl_writeblock,
static int __init init_inftl(void)
{
- printk(KERN_INFO "INFTL: inftlcore.c $Revision: 1.19 $, "
- "inftlmount.c %s\n", inftlmountrev);
-
return register_mtd_blktrans(&inftl_tr);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff