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| author | Boris Brezillon <bbrezillon@kernel.org> | 2018-11-04 14:43:37 +0100 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2019-04-08 10:21:08 +0200 |
| commit | 377e517b5fa53590418a7b4c2206082d92434fa3 (patch) | |
| tree | 04b56af9accf4b06573fa8e3f6267cf3283768e9 /include/linux/mtd | |
| parent | d090c25028e9df186bb0d31379f7d5605c57fa79 (diff) | |
| download | linux-377e517b5fa53590418a7b4c2206082d92434fa3.tar.gz linux-377e517b5fa53590418a7b4c2206082d92434fa3.tar.bz2 linux-377e517b5fa53590418a7b4c2206082d92434fa3.zip | |
mtd: nand: Add max_bad_eraseblocks_per_lun info to memorg
NAND datasheets usually give the maximum number of bad blocks per LUN
and this number can be used to help upper layers decide how much blocks
they should reserve for bad block handling.
Add a max_bad_eraseblocks_per_lun to the nand_memory_organization
struct and update the NAND_MEMORG() macro (and its users) accordingly.
We also provide a default mtd->_max_bad_blocks() implementation.
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Diffstat (limited to 'include/linux/mtd')
| -rw-r--r-- | include/linux/mtd/nand.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 7f53ece2c039..d32bb623d532 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -19,6 +19,7 @@ * @oobsize: OOB area size * @pages_per_eraseblock: number of pages per eraseblock * @eraseblocks_per_lun: number of eraseblocks per LUN (Logical Unit Number) + * @max_bad_eraseblocks_per_lun: maximum number of eraseblocks per LUN * @planes_per_lun: number of planes per LUN * @luns_per_target: number of LUN per target (target is a synonym for die) * @ntargets: total number of targets exposed by the NAND device @@ -29,18 +30,20 @@ struct nand_memory_organization { unsigned int oobsize; unsigned int pages_per_eraseblock; unsigned int eraseblocks_per_lun; + unsigned int max_bad_eraseblocks_per_lun; unsigned int planes_per_lun; unsigned int luns_per_target; unsigned int ntargets; }; -#define NAND_MEMORG(bpc, ps, os, ppe, epl, ppl, lpt, nt) \ +#define NAND_MEMORG(bpc, ps, os, ppe, epl, mbb, ppl, lpt, nt) \ { \ .bits_per_cell = (bpc), \ .pagesize = (ps), \ .oobsize = (os), \ .pages_per_eraseblock = (ppe), \ .eraseblocks_per_lun = (epl), \ + .max_bad_eraseblocks_per_lun = (mbb), \ .planes_per_lun = (ppl), \ .luns_per_target = (lpt), \ .ntargets = (nt), \ @@ -729,5 +732,6 @@ static inline bool nanddev_bbt_is_initialized(struct nand_device *nand) /* MTD -> NAND helper functions. */ int nanddev_mtd_erase(struct mtd_info *mtd, struct erase_info *einfo); +int nanddev_mtd_max_bad_blocks(struct mtd_info *mtd, loff_t offs, size_t len); #endif /* __LINUX_MTD_NAND_H */ |