static ssize_t ftl_reload(FAR void *priv, FAR uint8_t *buffer,
off_t startblock, size_t nblocks)
{
struct ftl_struct_s *dev = (struct ftl_struct_s *)priv;
ssize_t nread;
/* Read the full erase block into the buffer */
nread = MTD_BREAD(dev->mtd, startblock, nblocks, buffer);
if (nread != nblocks)
{
fdbg("Read %d blocks starting at block %d failed: %d\n",
nblocks, startblock, nread);
}
return nread;
}
int nxffs_rdcache(FAR struct nxffs_volume_s *volume, off_t block)
{
size_t nxfrd;
/* Check if the requested data is already in the cache */
if (block != volume->cblock)
{
/* Read the specified blocks into cache */
nxfrd = MTD_BREAD(volume->mtd, block, 1, volume->cache);
if (nxfrd != 1)
{
fdbg("ERROR: Read block %d failed: %d\n", block, nxfrd);
return -EIO;
}
/* Remember what is in the cache */
volume->cblock = block;
}
return OK;
}
int nxffs_dump(FAR struct mtd_dev_s *mtd, bool verbose)
{
#if defined(CONFIG_DEBUG) && defined(CONFIG_DEBUG_FS)
struct nxffs_blkinfo_s blkinfo;
int ret;
/* Get the volume geometry. (casting to uintptr_t first eliminates
* complaints on some architectures where the sizeof long is different
* from the size of a pointer).
*/
memset(&blkinfo, 0, sizeof(struct nxffs_blkinfo_s));
ret = MTD_IOCTL(mtd, MTDIOC_GEOMETRY, (unsigned long)((uintptr_t)&blkinfo.geo));
if (ret < 0)
{
fdbg("ERROR: MTD ioctl(MTDIOC_GEOMETRY) failed: %d\n", -ret);
goto errout;
}
/* Save the verbose output indication */
blkinfo.verbose = verbose;
/* Allocate a buffer to hold one block */
blkinfo.buffer = (FAR uint8_t *)kmalloc(blkinfo.geo.blocksize);
if (!blkinfo.buffer)
{
fdbg("ERROR: Failed to allocate block cache\n");
ret = -ENOMEM;
goto errout;
}
/* Now read every block on the device */
fdbg("NXFFS Dump:\n");
fdbg(g_hdrformat);
blkinfo.nblocks = blkinfo.geo.erasesize * blkinfo.geo.neraseblocks / blkinfo.geo.blocksize;
for (blkinfo.block = 0, blkinfo.offset = 0;
blkinfo.block < blkinfo.nblocks;
blkinfo.block++, blkinfo.offset += blkinfo.geo.blocksize)
{
/* Read the next block */
ret = MTD_BREAD(mtd, blkinfo.block, 1, blkinfo.buffer);
if (ret < 0)
{
fdbg("ERROR: Failed to read block %d\n", blkinfo.block);
goto errout_with_block;
}
/* Analyze the block */
nxffs_analyze(&blkinfo);
}
fdbg("%d blocks analyzed\n", blkinfo.nblocks);
errout_with_block:
kfree(blkinfo.buffer);
errout:
return ret;
#else
return -ENOSYS;
#endif
}
static int nxffs_badblocks(FAR struct nxffs_volume_s *volume)
{
FAR uint8_t *blkptr; /* Pointer to next block data */
off_t eblock; /* Erase block number */
off_t lblock; /* Logical block number */
ssize_t nxfrd; /* Number of blocks transferred */
bool good; /* TRUE: block is good */
bool modified; /* TRUE: The erase block has been modified */
int i;
/* Read and verify each erase block */
for (eblock = 0; eblock < volume->geo.neraseblocks; eblock++)
{
/* Read the entire erase block */
lblock = eblock * volume->blkper;
nxfrd = MTD_BREAD(volume->mtd, lblock, volume->blkper, volume->pack);
if (nxfrd != volume->blkper)
{
fdbg("Read erase block %d failed: %d\n", lblock, nxfrd);
return -EIO;
}
/* Process each logical block */
modified = false;
for (blkptr = volume->pack, i = 0;
i < volume->blkper;
blkptr += volume->geo.blocksize, i++)
{
FAR struct nxffs_block_s *blkhdr = (FAR struct nxffs_block_s*)blkptr;
/* Check block header */
good = true;
if (memcmp(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE) != 0 ||
blkhdr->state != BLOCK_STATE_GOOD)
{
good = false;
}
/* Check that block data is erased */
else
{
size_t blocksize = volume->geo.blocksize - SIZEOF_NXFFS_BLOCK_HDR;
size_t erasesize = nxffs_erased(&blkptr[SIZEOF_NXFFS_BLOCK_HDR], blocksize);
good = (blocksize == erasesize);
}
/* If the block is bad, attempt to re-write the block header indicating
* a bad block (of course, if the block has failed, this may not be
* possible, depending upon failure modes.
*/
if (!good)
{
memcpy(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE);
blkhdr->state = BLOCK_STATE_BAD;
modified = true;
}
}
/* If the erase block was modified, then re-write it */
if (modified)
{
nxfrd = MTD_BWRITE(volume->mtd, lblock, volume->blkper, volume->pack);
if (nxfrd != volume->blkper)
{
fdbg("Write erase block %d failed: %d\n", lblock, nxfrd);
return -EIO;
}
}
}
return OK;
}
static off_t mtdconfig_consolidate(FAR struct mtdconfig_struct_s *dev)
{
off_t src_block, dst_block;
off_t src_offset, dst_offset;
uint16_t blkper, x, bytes, bytes_left_in_block;
struct mtdconfig_header_s hdr;
int ret;
uint8_t sig[CONFIGDATA_BLOCK_HDR_SIZE];
uint8_t *pBuf;
/* Prepare to copy block 0 to the last block (erase blocks) */
src_block = 0;
dst_block = dev->neraseblocks - 1;
/* Ensure the last block is erased */
MTD_ERASE(dev->mtd, dst_block, 1);
blkper = dev->erasesize / dev->blocksize;
dst_block *= blkper; /* Convert to read/write blocks */
/* Allocate a small buffer for moving data */
pBuf = (uint8_t *)kmm_malloc(dev->blocksize);
if (pBuf == NULL)
{
return 0;
}
/* Now copy block zero to last block */
for (x = 0; x < blkper; x++)
{
ret = MTD_BREAD(dev->mtd, src_block++, 1, dev->buffer);
if (ret < 0)
{
/* I/O Error! */
goto errout;
}
ret = MTD_BWRITE(dev->mtd, dst_block++, 1, dev->buffer);
if (ret < 0)
{
/* I/O Error! */
goto errout;
}
}
/* Erase block zero and write a format signature. */
MTD_ERASE(dev->mtd, 0, 1);
sig[0] = 'C';
sig[1] = 'D';
sig[2] = CONFIGDATA_FORMAT_VERSION;
mtdconfig_writebytes(dev, 0, sig, sizeof(sig));
/* Now consolidate entries */
src_block = 1;
dst_block = 0;
src_offset = src_block * dev->erasesize + CONFIGDATA_BLOCK_HDR_SIZE;
dst_offset = CONFIGDATA_BLOCK_HDR_SIZE;
while (src_block < dev->neraseblocks)
{
/* Scan all headers and move them to the src_offset */
retry_relocate:
MTD_READ(dev->mtd, src_offset, sizeof(hdr), (uint8_t *) &hdr);
if (hdr.flags == MTD_ERASED_FLAGS)
{
/* Test if the source entry is active or if we are at the end
* of data for this erase block.
*/
if (hdr.id == MTD_ERASED_ID)
{
/* No more data in this erase block. Advance to the
* next one.
*/
src_offset = (src_block + 1) * dev->erasesize + CONFIGDATA_BLOCK_HDR_SIZE;
}
else
{
/* Test if this entry will fit in the current destination block */
bytes_left_in_block = (dst_block + 1) * dev->erasesize - dst_offset;
if (hdr.len + sizeof(hdr) > bytes_left_in_block)
{
/* Item doesn't fit in the block. Advance to the next one */
/* Update control variables */
dst_block++;
dst_offset = dst_block * dev->erasesize + CONFIGDATA_BLOCK_HDR_SIZE;
DEBUGASSERT(dst_block != src_block);
/* Retry the relocate */
goto retry_relocate;
}
/* Copy this entry to the destination */
//printf("REL HDR: ID=%04X,%02X Len=%4d Off=%5d Src off=%4d\n",
// hdr.id, hdr.instance, hdr.len, dst_offset, src_offset);
mtdconfig_writebytes(dev, dst_offset, (uint8_t *) &hdr, sizeof(hdr));
src_offset += sizeof(hdr);
dst_offset += sizeof(hdr);
/* Now copy the data */
while (hdr.len)
{
bytes = hdr.len;
if (bytes > dev->blocksize)
{
bytes = dev->blocksize;
}
/* Move the data. */
mtdconfig_readbytes(dev, src_offset, pBuf, bytes);
mtdconfig_writebytes(dev, dst_offset, pBuf, bytes);
/* Update control variables */
hdr.len -= bytes;
src_offset += bytes;
dst_offset += bytes;
}
}
}
else
{
/* This item has been released. Skip it! */
src_offset += sizeof(hdr) + hdr.len;
if (src_offset + sizeof(hdr) >= (src_block + 1) * dev->erasesize ||
src_offset == (src_block +1 ) * dev->erasesize)
{
/* No room left at end of source block */
src_offset = (src_block + 1) * dev->erasesize + CONFIGDATA_BLOCK_HDR_SIZE;
}
}
/* Test if we are out of space in the src block */
if (src_offset + sizeof(hdr) >= (src_block + 1) * dev->erasesize)
{
/* No room at end of src block for another header. Go to next
* source block.
*/
src_offset = (src_block + 1) * dev->erasesize + CONFIGDATA_BLOCK_HDR_SIZE;
}
/* Test if we advanced to the next block. If we did, then erase the
* old block.
*/
if (src_block != src_offset / dev->erasesize)
{
/* Erase the block ... we have emptied it */
MTD_ERASE(dev->mtd, src_block, 1);
src_block++;
}
/* Test if we are out of space in the dst block */
if (dst_offset + sizeof(hdr) >= (dst_block + 1) * dev->erasesize)
{
/* No room at end of dst block for another header. Go to next block. */
dst_block++;
dst_offset = dst_block * dev->erasesize + CONFIGDATA_BLOCK_HDR_SIZE;
DEBUGASSERT(dst_block != src_block);
}
}
errout:
kmm_free(pBuf);
return 0;
}
static off_t mtdconfig_ramconsolidate(FAR struct mtdconfig_struct_s *dev)
{
FAR uint8_t *pBuf;
FAR struct mtdconfig_header_s *phdr;
struct mtdconfig_header_s hdr;
uint16_t src_block = 0, dst_block = 0, blkper;
off_t dst_offset = CONFIGDATA_BLOCK_HDR_SIZE;
off_t src_offset = CONFIGDATA_BLOCK_HDR_SIZE;
off_t bytes_left_in_block;
uint8_t sig[CONFIGDATA_BLOCK_HDR_SIZE];
int ret;
/* Allocate a consolidation buffer */
pBuf = (uint8_t *)kmm_malloc(dev->erasesize);
if (pBuf == NULL)
{
/* Unable to allocate buffer, can't consolidate! */
return 0;
}
/* Loop for all blocks and consolidate them */
blkper = dev->erasesize / dev->blocksize;
while (src_block < dev->neraseblocks)
{
/* Point to beginning of pBuf and read the next erase block */
ret = MTD_BREAD(dev->mtd, src_block * blkper, blkper, pBuf);
if (ret < 0)
{
/* Error doing block read */
dst_offset = 0;
goto errout;
}
/* Now erase the block */
ret = MTD_ERASE(dev->mtd, src_block, 1);
if (ret < 0)
{
/* Error erasing the block */
dst_offset = 0;
goto errout;
}
/* If this is block zero, then write a format signature */
if (src_block == 0)
{
sig[0] = 'C';
sig[1] = 'D';
sig[2] = CONFIGDATA_FORMAT_VERSION;
mtdconfig_writebytes(dev, 0, sig, sizeof(sig));
}
/* Copy active items back to the MTD device */
while (src_offset < dev->erasesize)
{
phdr = (FAR struct mtdconfig_header_s *) &pBuf[src_offset];
if (phdr->id == MTD_ERASED_ID)
{
/* No more data in this erase block */
src_offset = dev->erasesize;
continue;
}
if (phdr->flags == MTD_ERASED_FLAGS)
{
/* This is an active entry. Copy it. Check if it
* fits in the current destination block.
*/
bytes_left_in_block = (dst_block + 1) * dev->erasesize -
dst_offset;
if (bytes_left_in_block < sizeof(*phdr) + phdr->len)
{
/* Item won't fit in the destination block. Move to
* the next block
*/
dst_block++;
dst_offset = dst_block * dev->erasesize + CONFIGDATA_BLOCK_HDR_SIZE;
/* Test for program bug. We shouldn't ever overflow
* even if no entries were inactive.
*/
DEBUGASSERT(dst_block != dev->neraseblocks);
}
/* Now Write the item to the current dst_offset location */
//printf("REL HDR: ID=%04X,%02X Len=%4d Off=%5d Src off=%4d\n",
// phdr->id, phdr->instance, phdr->len, dst_offset, src_offset);
ret = mtdconfig_writebytes(dev, dst_offset, (uint8_t *) phdr,
sizeof(hdr));
if (ret < 0)
{
dst_offset = 0;
goto errout;
}
dst_offset += sizeof(hdr);
ret = mtdconfig_writebytes(dev, dst_offset, &pBuf[src_offset
+ sizeof(hdr)], phdr->len);
dst_offset += phdr->len;
/* Test if enough space in dst block for another header */
if (dst_offset + sizeof(hdr) >= (dst_block + 1) * dev->erasesize ||
dst_offset == (dst_block + 1) * dev->erasesize)
{
dst_block++;
dst_offset = dst_block * dev->erasesize + CONFIGDATA_BLOCK_HDR_SIZE;
}
}
/* Increment past the current source item */
src_offset += sizeof(hdr) + phdr->len;
if (src_offset + sizeof(hdr) > dev->erasesize)
{
src_offset = dev->erasesize;
}
DEBUGASSERT(src_offset <= dev->erasesize);
}
/* Increment to next source block */
src_block++;
src_offset = CONFIGDATA_BLOCK_HDR_SIZE;
}
errout:
kmm_free(pBuf);
return dst_offset;
}
static int mtdconfig_writebytes(FAR struct mtdconfig_struct_s *dev, int offset,
FAR const uint8_t *pdata, int writelen)
{
int ret = OK;
#ifdef CONFIG_MTD_BYTE_WRITE
/* Test if this MTD device supports byte write */
if (dev->mtd->write != NULL)
{
ret = MTD_WRITE(dev->mtd, offset, writelen, pdata);
}
else
#endif
/* Perform the write using the block write method of the MTD */
{
uint16_t block;
uint16_t index;
off_t bytes_this_block;
off_t bytes_written = 0;
while (writelen)
{
/* Read existing data from the the block into the buffer */
block = offset / dev->blocksize;
ret = MTD_BREAD(dev->mtd, block, 1, dev->buffer);
if (ret != 1)
{
ret = -EIO;
goto errout;
}
index = offset - block * dev->blocksize;
bytes_this_block = dev->blocksize - index;
if (bytes_this_block > writelen)
{
bytes_this_block = writelen;
}
/* Now write data to the block */
memcpy(&dev->buffer[index], pdata, bytes_this_block);
ret = MTD_BWRITE(dev->mtd, block, 1, dev->buffer);
if (ret != 1)
{
ret = -EIO;
goto errout;
}
/* Update writelen, etc. */
writelen -= bytes_this_block;
pdata += bytes_this_block;
offset += bytes_this_block;
bytes_written += bytes_this_block;
}
/* Return the number of bytes written */
ret = bytes_written;
}
errout:
return ret;
}
static int mtdconfig_readbytes(FAR struct mtdconfig_struct_s *dev, int offset,
FAR uint8_t *pdata, int readlen)
{
off_t bytestoread = readlen;
off_t bytesthisblock, firstbyte;
off_t block, index;
int ret = OK;
size_t bytes;
/* Test if read interface supported. If it is, use it directly */
if ((dev->mtd->read == NULL) && (readlen < dev->blocksize))
{
/* Read interface available. Read directly to buffer */
bytes = MTD_READ(dev->mtd, offset, readlen, pdata);
if (bytes != readlen)
{
/* Error reading data! */
ret = -EIO;
}
}
else
{
/* Read interface not available, do a block read into our buffer */
block = offset / dev->blocksize;
firstbyte = offset - (block * dev->blocksize);
bytesthisblock = dev->blocksize - firstbyte;
if (bytesthisblock > readlen)
{
bytesthisblock = readlen;
}
index = 0;
while (bytestoread > 0)
{
if (bytesthisblock < dev->blocksize || bytestoread < dev->blocksize)
{
/* Copy to temp buffer first...don't need the whole block */
bytes = MTD_BREAD(dev->mtd, block, 1, dev->buffer);
if (bytes != 1)
{
/* Error reading data! */
ret = -EIO;
goto errout;
}
/* Copy data to the output buffer */
memcpy(&pdata[index], &dev->buffer[firstbyte], bytesthisblock);
}
else
{
/* We are reading a whole block. Read directly to buffer */
bytes = MTD_BREAD(dev->mtd, block, 1, &pdata[index]);
if (bytes != 1)
{
/* Error reading data! */
ret = -EIO;
goto errout;
}
}
/* Update values for next block read */
bytestoread -= bytesthisblock;
index += bytesthisblock;
bytesthisblock = dev->blocksize;
if (bytesthisblock > bytestoread)
{
bytesthisblock = bytestoread;
}
firstbyte = 0;
block++;
}
}
errout:
return ret;
}
static ssize_t ftl_flush(FAR void *priv, FAR const uint8_t *buffer,
off_t startblock, size_t nblocks)
{
struct ftl_struct_s *dev = (struct ftl_struct_s *)priv;
off_t alignedblock;
off_t mask;
off_t rwblock;
off_t eraseblock;
off_t offset;
size_t remaining;
size_t nxfrd;
int nbytes;
int ret;
/* Get the aligned block. Here is is assumed: (1) The number of R/W blocks
* per erase block is a power of 2, and (2) the erase begins with that same
* alignment.
*/
mask = dev->blkper - 1;
alignedblock = (startblock + mask) & ~mask;
/* Handle partial erase blocks before the first unaligned block */
remaining = nblocks;
if (alignedblock > startblock)
{
/* Check if the write is shorter than to the end of the erase block */
bool short_write = (remaining < (alignedblock - startblock));
/* Read the full erase block into the buffer */
rwblock = startblock & ~mask;
nxfrd = MTD_BREAD(dev->mtd, rwblock, dev->blkper, dev->eblock);
if (nxfrd != dev->blkper)
{
ferr("ERROR: Read erase block %d failed: %d\n", rwblock, nxfrd);
return -EIO;
}
/* Then erase the erase block */
eraseblock = rwblock / dev->blkper;
ret = MTD_ERASE(dev->mtd, eraseblock, 1);
if (ret < 0)
{
ferr("ERROR: Erase block=%d failed: %d\n", eraseblock, ret);
return ret;
}
/* Copy the user data at the end of the buffered erase block */
offset = (startblock & mask) * dev->geo.blocksize;
if (short_write)
{
nbytes = remaining * dev->geo.blocksize;
}
else
{
nbytes = dev->geo.erasesize - offset;
}
finfo("Copy %d bytes into erase block=%d at offset=%d\n",
nbytes, eraseblock, offset);
memcpy(dev->eblock + offset, buffer, nbytes);
/* And write the erase block back to flash */
nxfrd = MTD_BWRITE(dev->mtd, rwblock, dev->blkper, dev->eblock);
if (nxfrd != dev->blkper)
{
ferr("ERROR: Write erase block %d failed: %d\n", rwblock, nxfrd);
return -EIO;
}
/* Then update for amount written */
if (short_write)
{
remaining = 0;
}
else
{
remaining -= dev->blkper - (startblock & mask);
}
buffer += nbytes;
}
/* How handle full erase pages in the middle */
while (remaining >= dev->blkper)
{
/* Erase the erase block */
eraseblock = alignedblock / dev->blkper;
ret = MTD_ERASE(dev->mtd, eraseblock, 1);
if (ret < 0)
{
ferr("ERROR: Erase block=%d failed: %d\n", eraseblock, ret);
return ret;
}
/* Write a full erase back to flash */
finfo("Write %d bytes into erase block=%d at offset=0\n",
dev->geo.erasesize, alignedblock);
nxfrd = MTD_BWRITE(dev->mtd, alignedblock, dev->blkper, buffer);
if (nxfrd != dev->blkper)
{
ferr("ERROR: Write erase block %d failed: %d\n", alignedblock, nxfrd);
return -EIO;
}
/* Then update for amount written */
alignedblock += dev->blkper;
remaining -= dev->blkper;
buffer += dev->geo.erasesize;
}
/* Finally, handle any partial blocks after the last full erase block */
if (remaining > 0)
{
/* Read the full erase block into the buffer */
nxfrd = MTD_BREAD(dev->mtd, alignedblock, dev->blkper, dev->eblock);
if (nxfrd != dev->blkper)
{
ferr("ERROR: Read erase block %d failed: %d\n", alignedblock, nxfrd);
return -EIO;
}
/* Then erase the erase block */
eraseblock = alignedblock / dev->blkper;
ret = MTD_ERASE(dev->mtd, eraseblock, 1);
if (ret < 0)
{
ferr("ERROR: Erase block=%d failed: %d\n", eraseblock, ret);
return ret;
}
/* Copy the user data at the beginning the buffered erase block */
nbytes = remaining * dev->geo.blocksize;
finfo("Copy %d bytes into erase block=%d at offset=0\n",
nbytes, alignedblock);
memcpy(dev->eblock, buffer, nbytes);
/* And write the erase back to flash */
nxfrd = MTD_BWRITE(dev->mtd, alignedblock, dev->blkper, dev->eblock);
if (nxfrd != dev->blkper)
{
ferr("ERROR: Write erase block %d failed: %d\n", alignedblock, nxfrd);
return -EIO;
}
}
return nblocks;
}
int nxffs_blockstats(FAR struct nxffs_volume_s *volume,
FAR struct nxffs_blkstats_s *stats)
{
#ifndef CONFIG_NXFFS_NAND
FAR uint8_t *bptr; /* Pointer to next block data */
int lblock; /* Logical block index */
#endif
off_t ioblock; /* I/O block number */
int ret;
/* Process each erase block */
memset(stats, 0, sizeof(struct nxffs_blkstats_s));
#ifndef CONFIG_NXFFS_NAND
for (ioblock = 0; ioblock < volume->nblocks; ioblock += volume->blkper)
{
/* Read the full erase block */
ret = MTD_BREAD(volume->mtd, ioblock, volume->blkper, volume->pack);
if (ret < volume->blkper)
{
ferr("ERROR: Failed to read erase block %d: %d\n",
ioblock / volume->blkper, ret);
return ret;
}
/* Then examine each logical block in the erase block */
for (bptr = volume->pack, lblock = 0;
lblock < volume->blkper;
bptr += volume->geo.blocksize, lblock++)
{
/* We read the block successfully, now check for errors tagged
* in the NXFFS data.
*/
FAR struct nxffs_block_s *blkhdr = (FAR struct nxffs_block_s *)bptr;
/* Increment the total count of blocks examined */
stats->nblocks++;
/* Collect statistics */
/* Check if this is a block that should be recognized by NXFFS */
if (memcmp(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE) != 0)
{
/* Nope.. block must not be formatted */
stats->nunformat++;
}
else if (blkhdr->state == BLOCK_STATE_BAD)
{
/* The block is marked as bad */
stats->nbad++;
}
else if (blkhdr->state == BLOCK_STATE_GOOD)
{
/* The block is marked as good */
stats-> ngood++;
}
else
{
/* The good/bad mark is not recognized. Let's call this
* corrupt (vs. unformatted).
*/
stats->ncorrupt++;
}
}
}
finfo("Number blocks: %d\n", stats->nblocks);
finfo(" Good blocks: %d\n", stats->ngood);
finfo(" Bad blocks: %d\n", stats->nbad);
finfo(" Unformatted blocks: %d\n", stats->nunformat);
finfo(" Corrupt blocks: %d\n", stats->ncorrupt);
#else
for (ioblock = 0; ioblock < volume->nblocks; ioblock++)
{
/* Increment the total count of blocks examined */
stats->nblocks++;
/* Read each logical block, one at a time. We could read all of the
* blocks in the erase block into volume->pack at once. But this would
* be a problem for NAND which may generate read errors due to bad ECC
* on individual blocks.
*/
ret = MTD_BREAD(volume->mtd, ioblock, 1, volume->pack);
if (ret < 1)
{
/* This should not happen at all on most kinds of FLASH. But a
* bad read will happen normally with a NAND device that has
* uncorrectable blocks. So, just for NAND, we keep the count
* of unreadable blocks.
*/
ferr("ERROR: Failed to read block %d: %d\n", ioblock, ret);
/* Increment the count of un-readable blocks */
stats->nbadread++;
}
else
{
/* We read the block successfully, now check for errors tagged
* in the NXFFS data.
*/
FAR struct nxffs_block_s *blkhdr = (FAR struct nxffs_block_s *)volume->pack;
/* Collect statistics */
/* Check if this is a block that should be recognized by NXFFS */
if (memcmp(blkhdr->magic, g_blockmagic, NXFFS_MAGICSIZE) != 0)
{
/* Nope.. block must not be formatted */
stats->nunformat++;
}
else if (blkhdr->state == BLOCK_STATE_BAD)
{
/* The block is marked as bad */
stats->nbad++;
}
else if (blkhdr->state == BLOCK_STATE_GOOD)
{
/* The block is marked as good */
stats-> ngood++;
}
else
{
/* The good/bad mark is not recognized. Let's call this
* corrupt (vs. unformatted).
*/
stats->ncorrupt++;
}
}
}
finfo("Number blocks: %d\n", stats->nblocks);
finfo(" Good blocks: %d\n", stats->ngood);
finfo(" Bad blocks: %d\n", stats->nbad);
finfo(" Unformatted blocks: %d\n", stats->nunformat);
finfo(" Corrupt blocks: %d\n", stats->ncorrupt);
finfo(" Unreadable blocks: %d\n", stats->nbadread);
#endif
return OK;
}
int nxffs_dump(FAR struct mtd_dev_s *mtd, bool verbose)
{
#if defined(CONFIG_DEBUG_FEATURES) && defined(CONFIG_DEBUG_FS)
struct nxffs_blkinfo_s blkinfo;
int ret;
/* Get the volume geometry. (casting to uintptr_t first eliminates
* complaints on some architectures where the sizeof long is different
* from the size of a pointer).
*/
memset(&blkinfo, 0, sizeof(struct nxffs_blkinfo_s));
ret = MTD_IOCTL(mtd, MTDIOC_GEOMETRY, (unsigned long)((uintptr_t)&blkinfo.geo));
if (ret < 0)
{
ferr("ERROR: MTD ioctl(MTDIOC_GEOMETRY) failed: %d\n", -ret);
return ret;
}
/* Save the verbose output indication */
blkinfo.verbose = verbose;
/* Allocate a buffer to hold one block */
blkinfo.buffer = (FAR uint8_t *)kmm_malloc(blkinfo.geo.blocksize);
if (!blkinfo.buffer)
{
ferr("ERROR: Failed to allocate block cache\n");
return -ENOMEM;
}
/* Now read every block on the device */
syslog(LOG_NOTICE, "NXFFS Dump:\n");
syslog(LOG_NOTICE, g_hdrformat);
blkinfo.nblocks = blkinfo.geo.erasesize * blkinfo.geo.neraseblocks / blkinfo.geo.blocksize;
for (blkinfo.block = 0, blkinfo.offset = 0;
blkinfo.block < blkinfo.nblocks;
blkinfo.block++, blkinfo.offset += blkinfo.geo.blocksize)
{
/* Read the next block */
ret = MTD_BREAD(mtd, blkinfo.block, 1, blkinfo.buffer);
if (ret < 0)
{
#ifndef CONFIG_NXFFS_NAND
/* Read errors are fatal */
ferr("ERROR: Failed to read block %d\n", blkinfo.block);
kmm_free(blkinfo.buffer);
return ret;
#else
/* A read error is probably fatal on all media but NAND.
* On NAND, the read error probably just signifies a block
* with an uncorrectable ECC failure. So, to handle NAND,
* just report the read error and continue.
*/
syslog(LOG_NOTICE, g_format, blkinfo.block, 0, "BLOCK", "RD FAIL",
blkinfo.geo.blocksize);
#endif
}
else
{
/* Analyze the block that we just read */
nxffs_analyze(&blkinfo);
}
}
syslog(LOG_NOTICE, "%d blocks analyzed\n", blkinfo.nblocks);
kmm_free(blkinfo.buffer);
return OK;
#else
return -ENOSYS;
#endif
}
