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MLC and TLC NAND devices are using NAND cells exposing more than one bit, but instead of attaching all the bits in a given cell to a single NAND page, each bit is usually attached to a different page. This concept is called 'page pairing', and has significant impacts on the flash storage usage. The main problem showed by these devices is that interrupting a page program operation may not only corrupt the page we are programming but also the page it is paired with, hence the need to expose to MTD users the pairing scheme information. The pairing APIs allows one to query pairing information attached to a given page (here called wunit), or the other way around (the wunit pointed by pairing information). It also provides several helpers to help the conversion between absolute offsets and wunits, and query the number of pairing groups. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Brian Norris <computersforpeace@gmail.com> |
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| .. | ||
| chips | ||
| devices | ||
| lpddr | ||
| maps | ||
| nand | ||
| onenand | ||
| spi-nor | ||
| tests | ||
| ubi | ||
| afs.c | ||
| ar7part.c | ||
| bcm47xxpart.c | ||
| bcm63xxpart.c | ||
| cmdlinepart.c | ||
| ftl.c | ||
| inftlcore.c | ||
| inftlmount.c | ||
| Kconfig | ||
| Makefile | ||
| mtd_blkdevs.c | ||
| mtdblock_ro.c | ||
| mtdblock.c | ||
| mtdchar.c | ||
| mtdconcat.c | ||
| mtdcore.c | ||
| mtdcore.h | ||
| mtdoops.c | ||
| mtdpart.c | ||
| mtdsuper.c | ||
| mtdswap.c | ||
| nftlcore.c | ||
| nftlmount.c | ||
| ofpart.c | ||
| redboot.c | ||
| rfd_ftl.c | ||
| sm_ftl.c | ||
| sm_ftl.h | ||
| ssfdc.c | ||