diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mtd/partitions.h | 3 | ||||
| -rw-r--r-- | include/mtd/ubi-user.h | 16 |
2 files changed, 17 insertions, 2 deletions
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h index 2475228c1158..1f8d24bdafda 100644 --- a/include/linux/mtd/partitions.h +++ b/include/linux/mtd/partitions.h @@ -79,9 +79,10 @@ struct mtd_part_parser { extern int register_mtd_parser(struct mtd_part_parser *parser); extern int deregister_mtd_parser(struct mtd_part_parser *parser); -int mtd_is_partition(struct mtd_info *mtd); +int mtd_is_partition(const struct mtd_info *mtd); int mtd_add_partition(struct mtd_info *master, char *name, long long offset, long long length); int mtd_del_partition(struct mtd_info *master, int partno); +uint64_t mtd_get_device_size(const struct mtd_info *mtd); #endif diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h index 8787349fbafe..53cae1e11e57 100644 --- a/include/mtd/ubi-user.h +++ b/include/mtd/ubi-user.h @@ -222,6 +222,7 @@ enum { * @ubi_num: UBI device number to create * @mtd_num: MTD device number to attach * @vid_hdr_offset: VID header offset (use defaults if %0) + * @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs * @padding: reserved for future, not used, has to be zeroed * * This data structure is used to specify MTD device UBI has to attach and the @@ -245,12 +246,25 @@ enum { * be 2KiB-64 bytes = 1984. Note, that this position is not even 512-bytes * aligned, which is OK, as UBI is clever enough to realize this is 4th * sub-page of the first page and add needed padding. + * + * The @max_beb_per1024 is the maximum amount of bad PEBs UBI expects on the + * UBI device per 1024 eraseblocks. This value is often given in an other form + * in the NAND datasheet (min NVB i.e. minimal number of valid blocks). The + * maximum expected bad eraseblocks per 1024 is then: + * 1024 * (1 - MinNVB / MaxNVB) + * Which gives 20 for most NAND devices. This limit is used in order to derive + * amount of eraseblock UBI reserves for handling new bad blocks. If the device + * has more bad eraseblocks than this limit, UBI does not reserve any physical + * eraseblocks for new bad eraseblocks, but attempts to use available + * eraseblocks (if any). The accepted range is 0-768. If 0 is given, the + * default kernel value of %CONFIG_MTD_UBI_BEB_LIMIT will be used. */ struct ubi_attach_req { __s32 ubi_num; __s32 mtd_num; __s32 vid_hdr_offset; - __s8 padding[12]; + __s16 max_beb_per1024; + __s8 padding[10]; }; /** |
