// return valid index if found BMT, else return 0
static int load_bmt_data(int start, int pool_size)
{
int bmt_index = start + pool_size - 1; // find from the end
phys_bmt_struct phys_table;
int i;
MSG(INIT, "[%s]: begin to search BMT from block 0x%x\n", __FUNCTION__, bmt_index);
for (bmt_index = start + pool_size - 1; bmt_index >= start; bmt_index--)
{
if (nand_block_bad_bmt(OFFSET(bmt_index)))
{
MSG(INIT, "Skip bad block: %d\n", bmt_index);
continue;
}
if (!nand_read_page_bmt(PAGE_ADDR(bmt_index), dat_buf, oob_buf))
{
MSG(INIT, "Error found when read block %d\n", bmt_index);
continue;
}
if (!match_bmt_signature(dat_buf, oob_buf))
{
continue;
}
MSG(INIT, "Match bmt signature @ block: 0x%x\n", bmt_index);
memcpy(&phys_table, dat_buf + MAIN_SIGNATURE_OFFSET, sizeof(phys_table));
if (!valid_bmt_data(&phys_table))
{
MSG(INIT, "BMT data is not correct %d\n", bmt_index);
continue;
} else
{
bmt.mapped_count = phys_table.header.mapped_count;
bmt.version = phys_table.header.version;
// bmt.bad_count = phys_table.header.bad_count;
memcpy(bmt.table, phys_table.table, bmt.mapped_count * sizeof(bmt_entry));
MSG(INIT, "bmt found at block: %d, mapped block: %d\n", bmt_index, bmt.mapped_count);
for (i = 0; i < bmt.mapped_count; i++)
{
if (!nand_block_bad_bmt(OFFSET(bmt.table[i].bad_index)))
{
MSG(INIT, "block 0x%x is not mark bad, should be power lost last time\n", bmt.table[i].bad_index);
mark_block_bad_bmt(OFFSET(bmt.table[i].bad_index));
}
}
return bmt_index;
}
}
MSG(INIT, "bmt block not found!\n");
return 0;
}
// return valid index if found BMT, else return 0
static int load_bmt_data(int start, int pool_size)
{
int bmt_index = start + pool_size - 1; // find from the end
int i;
MSG("begin to search BMT from block %d \n", bmt_index);
for (bmt_index = start + pool_size - 1; bmt_index >= start; bmt_index--)
{
if (nand_block_bad_bmt(OFFSET(bmt_index), BAD_BLOCK_RAW) || nand_block_bad_bmt(OFFSET(bmt_index), BMT_BADBLOCK_GENERATE_LATER))
{
MSG("Skip bad block: %d \n", bmt_index);
continue;
}
if (nand_read_page_bmt(PAGE_ADDR(bmt_index), dat_buf, oob_buf))
{
MSG("Error found when read block: %d\n", bmt_index);
continue;
}
if (!match_bmt_signature(dat_buf, oob_buf))
{
continue;
}
MSG("Match bmt signature @ block: %d\n", bmt_index);
memcpy(&lbd_phys_table, dat_buf + MAIN_SIGNATURE_OFFSET, sizeof(lbd_phys_table));
if (!valid_bmt_data(&lbd_phys_table))
{
MSG("BMT data is not correct: %d\n", bmt_index);
continue;
}
else
{
bmt.mapped_count = lbd_phys_table.header.mapped_count;
bmt.version = lbd_phys_table.header.version;
memcpy(bmt.table, lbd_phys_table.table, bmt.mapped_count * sizeof(bmt_entry));
MSG("bmt found at block: %d, mapped block: %d\n", bmt_index, bmt.mapped_count);
for (i = 0; i < bmt.mapped_count; i++)
{
if (!nand_block_bad_bmt(OFFSET(bmt.table[i].bad_index), BAD_BLOCK_RAW))
{
MSG("block %d is not mark bad, should be power lost last time\n", bmt.table[i].bad_index);
mark_block_bad_bmt(OFFSET(bmt.table[i].bad_index), BAD_BLOCK_RAW);
}
}
return bmt_index;
}
}
MSG("bmt not found!\n");
return 0;
}
static int migrate_from_bad(int offset, u8 *write_dat, u8 *write_oob)
{
int page;
int error_block = offset / BLOCK_SIZE_BMT;
int error_page = (offset / PAGE_SIZE_BMT) % page_per_block;
int to_index;
to_index = find_available_block(false);
if (!to_index)
{
MSG("Cannot find an available block for BMT\n");
return 0;
}
for (page = 0; page < error_page; page++)
{
nand_read_page_bmt(PAGE_ADDR(error_block) + page, dat_buf, oob_buf);
if (error_block < system_block_count)
{
set_bad_index_to_oob(oob_buf, error_block);
}
if (nand_write_page_bmt(PAGE_ADDR(to_index) + page, dat_buf, oob_buf))
{
MSG("Write page %d fail\n", PAGE_ADDR(to_index) + page);
mark_block_bad_bmt(OFFSET(to_index), BMT_BADBLOCK_GENERATE_LATER);
return migrate_from_bad(offset, write_dat, write_oob);
}
}
{
memset(oob_buf, 0xFF, sizeof(oob_buf));
#if defined(TCSUPPORT_CPU_MT7510)||defined(TCSUPPORT_CPU_MT7520)
memcpy(oob_buf, write_oob, mtd_bmt->oobsize);
#else
memcpy(oob_buf, write_oob, 1 << nand_chip_bmt->flash->oob_shift);
#endif
if (error_block < system_block_count)
set_bad_index_to_oob(oob_buf, error_block); // if error_block is already a mapped block, original mapping index is in OOB.
if (nand_write_page_bmt(PAGE_ADDR(to_index) + error_page, write_dat, oob_buf))
{
MSG("Write page %d fail\n", PAGE_ADDR(to_index) + error_page);
mark_block_bad_bmt(OFFSET(to_index), BMT_BADBLOCK_GENERATE_LATER);
return migrate_from_bad(offset, write_dat, write_oob);
}
}
MSG("Migrate from %d to %d done!\n",error_block, to_index);
return to_index;
}
static int load_bbt_data(int start, int pool_size, init_bbt_struct *init_bbt)
{
int i;
int ret = 0;
int bbt_index = start;
for(;bbt_index < (start + pool_size); bbt_index++)
{
if (nand_block_bad_bmt(OFFSET(bbt_index), BAD_BLOCK_RAW) || nand_block_bad_bmt(OFFSET(bbt_index), BMT_BADBLOCK_GENERATE_LATER))
{
MSG("Skip bad block: %d\n", bbt_index);
continue;
}
if (nand_read_page_bmt(PAGE_ADDR(bbt_index), dat_buf, oob_buf))
{
MSG("Error found when read block %d\n", bbt_index);
continue;
}
if (!match_bbt_signature(dat_buf, oob_buf))
{
continue;
}
MSG("Match bbt signature \n");
memcpy(&lbd_init_table, dat_buf + BBT_SIGNATURE_OFFSET, sizeof(lbd_init_table));
if (!valid_bbt_data(&lbd_init_table))
{
MSG("BBT data is not correct \n");
continue;
}
else
{
init_bbt->badblock_count = lbd_init_table.header.badblock_count;
init_bbt->version = lbd_init_table.header.version;
memcpy(init_bbt->badblock_table, lbd_init_table.badblock_table, (init_bbt->badblock_count) * 2);
MSG("bbt found, bad block count: %d\n", lbd_init_bbt->badblock_count);
for (i = 0; i < init_bbt->badblock_count; i++)
{
MSG("lbd_init_bbt->badblock_table[%d]: %d \n", i, lbd_init_bbt->badblock_table[i]);
}
return bbt_index;
}
}
return ret;
}
/*******************************************************************
* Reconstruct bmt, called when found bmt info doesn't match bad
* block info in flash.
*
* Return NULL for failure
*******************************************************************/
bmt_struct *reconstruct_bmt(bmt_struct * bmt)
{
int i;
int index = system_block_count;
unsigned short bad_index;
// init everything in BMT struct
bmt->version = BMT_VERSION;
bmt->bad_count = 0;
bmt->mapped_count = 0;
memset(bmt->table, 0, bmt_block_count * sizeof(bmt_entry));
for (i = 0; i < bmt_block_count; i++, index++)
{
if (nand_block_bad_bmt(OFFSET(index), BAD_BLOCK_RAW) || nand_block_bad_bmt(OFFSET(index), BMT_BADBLOCK_GENERATE_LATER))
{
MSG("Skip bad block: %d \n", index);
continue;
}
nand_read_page_bmt(PAGE_ADDR(index), dat_buf, oob_buf);
if ((bad_index = get_bad_index_from_oob(oob_buf)) >= system_block_count)
{
MSG("get bad index: 0x%x \n", bad_index);
if (bad_index != 0xFFFF)
MSG("Invalid bad index found in block: %d \n", index);
continue;
}
MSG("Block 0x%x is mapped to bad block: 0x%x\n", index, bad_index);
if (!nand_block_bad_bmt(OFFSET(bad_index), BAD_BLOCK_RAW))
{
mark_block_bad_bmt(OFFSET(bad_index), BAD_BLOCK_RAW);
MSG("block %d is not marked as bad, mark it\n", bad_index);
}
{
// add mapping to BMT
bmt->table[bmt->mapped_count].bad_index = bad_index;
bmt->table[bmt->mapped_count].mapped_index = index;
bmt->mapped_count++;
}
MSG("Add mapping: %d -> %d to BMT\n", bad_index, index);
}
MSG("Scan replace pool done, mapped block: %d\n", bmt->mapped_count);
return bmt;
}
/*******************************************************************
* Reconstruct bmt, called when found bmt info doesn't match bad
* block info in flash.
*
* Return NULL for failure
*******************************************************************/
bmt_struct *reconstruct_bmt(bmt_struct * bmt)
{
int i;
int index = system_block_count;
unsigned short bad_index;
int mapped;
bmt->version = BMT_VERSION;
bmt->bad_count = 0;
bmt->mapped_count = 0;
memset(bmt->table, 0, bmt_block_count * sizeof(bmt_entry));
for (i = 0; i < bmt_block_count; i++, index++)
{
if (nand_block_bad_bmt(OFFSET(index)))
{
MSG(INFO, "Skip bad block: 0x%x\n", index);
continue;
}
nand_read_page_bmt(PAGE_ADDR(index), dat_buf, oob_buf);
if ((bad_index = get_bad_index_from_oob(oob_buf)) >= system_block_count)
{
MSG(INIT, "get bad index: 0x%x\n", bad_index);
if (bad_index != 0xFFFF)
MSG(INIT, "Invalid bad index found in block 0x%x, bad index 0x%x\n", index, bad_index);
continue;
}
MSG(INIT, "Block 0x%x is mapped to bad block: 0x%x\n", index, bad_index);
if (!nand_block_bad_bmt(OFFSET(bad_index)))
{
MSG(INIT, "\tbut block 0x%x is not marked as bad, invalid mapping\n", bad_index);
continue; // no need to erase here, it will be erased later when trying to write BMT
}
if ((mapped = is_block_mapped(bad_index)) >= 0)
{
MSG(INIT, "bad block 0x%x is mapped to 0x%x, should be caused by power lost, replace with one\n", bmt->table[mapped].bad_index, bmt->table[mapped].mapped_index);
bmt->table[mapped].mapped_index = index; // use new one instead.
} else
{
bmt->table[bmt->mapped_count].bad_index = bad_index;
bmt->table[bmt->mapped_count].mapped_index = index;
bmt->mapped_count++;
}
MSG(INIT, "Add mapping: 0x%x -> 0x%x to BMT\n", bad_index, index);
}
MSG(INIT, "Scan replace pool done, mapped block: %d\n", bmt->mapped_count);
memset(oob_buf, 0xFF, sizeof(oob_buf));
fill_nand_bmt_buffer(bmt, dat_buf, oob_buf);
if (!write_bmt_to_flash(dat_buf, oob_buf))
{
MSG(INIT, "TRAGEDY: cannot find a place to write BMT!!!!\n");
}
return bmt;
}
static int migrate_from_bad(int offset, u8 * write_dat, u8 * write_oob)
{
int page;
int error_block = offset / BLOCK_SIZE_BMT;
int error_page = (offset / PAGE_SIZE_BMT) % page_per_block;
int to_index;
memcpy(oob_buf, write_oob, MAX_OOB_SIZE);
to_index = find_available_block(false);
if (!to_index)
{
MSG(INIT, "Cannot find an available block for BMT\n");
return 0;
}
{ // migrate error page first
MSG(INIT, "Write error page: 0x%x\n", error_page);
if (!write_dat)
{
nand_read_page_bmt(PAGE_ADDR(error_block) + error_page, dat_buf, NULL);
write_dat = dat_buf;
}
// memcpy(oob_buf, write_oob, MAX_OOB_SIZE);
if (error_block < system_block_count)
set_bad_index_to_oob(oob_buf, error_block); // if error_block is already a mapped block, original mapping index is in OOB.
if (!nand_write_page_bmt(PAGE_ADDR(to_index) + error_page, write_dat, oob_buf))
{
MSG(INIT, "Write to page 0x%x fail\n", PAGE_ADDR(to_index) + error_page);
mark_block_bad_bmt(OFFSET(to_index));
return migrate_from_bad(offset, write_dat, write_oob);
}
}
for (page = 0; page < page_per_block; page++)
{
if (page != error_page)
{
nand_read_page_bmt(PAGE_ADDR(error_block) + page, dat_buf, oob_buf);
if (is_page_used(dat_buf, oob_buf))
{
if (error_block < system_block_count)
{
set_bad_index_to_oob(oob_buf, error_block);
}
MSG(INIT, "\tmigrate page 0x%x to page 0x%x\n", PAGE_ADDR(error_block) + page, PAGE_ADDR(to_index) + page);
if (!nand_write_page_bmt(PAGE_ADDR(to_index) + page, dat_buf, oob_buf))
{
MSG(INIT, "Write to page 0x%x fail\n", PAGE_ADDR(to_index) + page);
mark_block_bad_bmt(OFFSET(to_index));
return migrate_from_bad(offset, write_dat, write_oob);
}
}
}
}
MSG(INIT, "Migrate from 0x%x to 0x%x done!\n", error_block, to_index);
return to_index;
}
/*******************************************************************
* Reconstruct bmt, called when found bmt info doesn't match bad
* block info in flash.
*
* Return NULL for failure
*******************************************************************/
bmt_struct *reconstruct_bmt(bmt_struct * bmt)
{
int i;
int index = system_block_count;
unsigned short bad_index;
int mapped;
// init everything in BMT struct
bmt->version = BMT_VERSION;
bmt->bad_count = 0;
bmt->mapped_count = 0;
memset(bmt->table, 0, bmt_block_count * sizeof(bmt_entry));
for (i = 0; i < bmt_block_count; i++, index++)
{
if (nand_block_bad_bmt(OFFSET(index)))
{
// MSG(INIT, "Skip bad block: 0x%x\n", index);
// bmt->bad_count++;
continue;
}
// MSG(INIT, "read page: 0x%x\n", PAGE_ADDR(index));
nand_read_page_bmt(PAGE_ADDR(index), dat_buf, oob_buf);
/* if (mt6573_nand_read_page_hw(PAGE_ADDR(index), dat_buf))
{
MSG(INIT, "Error when read block %d\n", bmt_block_index);
continue;
} */
if ((bad_index = get_bad_index_from_oob(oob_buf)) >= system_block_count)
{
// MSG(INIT, "get bad index: 0x%x\n", bad_index);
if (bad_index != 0xFFFF)
MSG(INIT, "warning @ 0x%x\n", index);
continue;
}
// MSG(INIT, "Block 0x%x is mapped to bad block: 0x%x\n", index, bad_index);
if (!nand_block_bad_bmt(OFFSET(bad_index)))
{
// MSG(INIT, "\tbut block 0x%x is not marked as bad, invalid mapping\n", bad_index);
continue; // no need to erase here, it will be erased later when trying to write BMT
}
if ( (mapped = is_block_mapped(bad_index)) >= 0)
{
// MSG(INIT, "bad block 0x%x is mapped to 0x%x, should be caused by power lost, replace with one\n",
// bmt->table[mapped].bad_index, bmt->table[mapped].mapped_index);
bmt->table[mapped].mapped_index = index; // use new one instead.
}
else
{
// add mapping to BMT
bmt->table[bmt->mapped_count].bad_index = bad_index;
bmt->table[bmt->mapped_count].mapped_index = index;
bmt->mapped_count++;
}
MSG(INIT, "Add mapping: 0x%x -> 0x%x to BMT\n", bad_index, index);
}
MSG(INIT, "Scan replace pool done, mapped block: %d\n", bmt->mapped_count);
// dump_bmt_info(bmt);
// fill NAND BMT buffer
memset(oob_buf, 0xFF, sizeof(oob_buf));
fill_nand_bmt_buffer(bmt, dat_buf, oob_buf);
// write BMT back
if (!write_bmt_to_flash(dat_buf, oob_buf))
{
MSG(INIT, "TRAGEDY\n");
}
return bmt;
}
