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kernel: mtk_bmt: add debugfs file to attempt repair of remapped sectors

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This can be used for sectors that are not physically damaged

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2022-03-10 16:23:25 +01:00
parent 06382d1af7
commit 2a8a333ee9
1 changed files with 26 additions and 1 deletions
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27
target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c
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@ -310,9 +310,32 @@ mtk_bmt_replace_ops(struct mtd_info *mtd)
mtd->_block_markbad = mtk_bmt_block_markbad;
}
static int mtk_bmt_debug_repair(void *data, u64 val)
{
int block = val >> bmtd.blk_shift;
int prev_block, new_block;
prev_block = bmtd.ops->get_mapping_block(block);
if (prev_block < 0)
return -EIO;
bmtd.ops->unmap_block(block);
new_block = bmtd.ops->get_mapping_block(block);
if (new_block < 0)
return -EIO;
if (prev_block == new_block)
return 0;
bbt_nand_erase(new_block);
bbt_nand_copy(new_block, prev_block, bmtd.blk_size);
return 0;
}
static int mtk_bmt_debug_mark_good(void *data, u64 val)
{
bmtd.ops->unmap_block(val >> bmtd.blk_shift);
bmtd.ops->unmap_block(val >> bmtd.blk_shift);
return 0;
}
@ -337,6 +360,7 @@ static int mtk_bmt_debug(void *data, u64 val)
}
DEFINE_DEBUGFS_ATTRIBUTE(fops_repair, NULL, mtk_bmt_debug_repair, "%llu\n");
DEFINE_DEBUGFS_ATTRIBUTE(fops_mark_good, NULL, mtk_bmt_debug_mark_good, "%llu\n");
DEFINE_DEBUGFS_ATTRIBUTE(fops_mark_bad, NULL, mtk_bmt_debug_mark_bad, "%llu\n");
DEFINE_DEBUGFS_ATTRIBUTE(fops_debug, NULL, mtk_bmt_debug, "%llu\n");
@ -350,6 +374,7 @@ mtk_bmt_add_debugfs(void)
if (!dir)
return;
debugfs_create_file_unsafe("repair", S_IWUSR, dir, NULL, &fops_repair);
debugfs_create_file_unsafe("mark_good", S_IWUSR, dir, NULL, &fops_mark_good);
debugfs_create_file_unsafe("mark_bad", S_IWUSR, dir, NULL, &fops_mark_bad);
debugfs_create_file_unsafe("debug", S_IWUSR, dir, NULL, &fops_debug);