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kernel: mtk_bmt: add debugfs file to attempt repair of remapped sectors
author
Felix Fietkau
<nbd@nbd.name>
Thu, 10 Mar 2022 15:23:25 +0000
(16:23 +0100)
committer
Felix Fietkau
<nbd@nbd.name>
Fri, 25 Mar 2022 20:11:09 +0000
(21:11 +0100)
This can be used for sectors that are not physically damaged
Signed-off-by: Felix Fietkau <nbd@nbd.name>
target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c
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diff --git
a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c
b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c
index 6e7b6bb5f91bef9bfcb5a03ba8973a8f43784494..f1df4a11f12dad104a39f9c7b886a15584d14c02 100644
(file)
--- a/
target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c
+++ b/
target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c
@@
-310,9
+310,32
@@
mtk_bmt_replace_ops(struct mtd_info *mtd)
mtd->_block_markbad = mtk_bmt_block_markbad;
}
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)
{
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;
}
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");
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;
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);
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);