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lightnvm: move block fold outside of get_bb_tbl()

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The get block table command returns a list of blocks and planes
with their associated state. Users, such as gennvm and sysblk,
manages all planes as a single virtual block.

It was therefore  natural to fold the bad block list before it is
returned. However, to allow users, which manages on a per-plane
block level, to also use the interface, the get_bb_tbl interface is
changed to not fold by default and instead let the caller fold if
necessary.

Reviewed by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling
2016-05-06 20:02:58 +02:00
committed by Jens Axboe
parent 4891d120b9
commit 22e8c9766a
5 changed files with 73 additions and 58 deletions
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35
drivers/lightnvm/core.c
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@@ -420,6 +420,41 @@ int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
}
EXPORT_SYMBOL(nvm_submit_ppa);
/*
* folds a bad block list from its plane representation to its virtual
* block representation. The fold is done in place and reduced size is
* returned.
*
* If any of the planes status are bad or grown bad block, the virtual block
* is marked bad. If not bad, the first plane state acts as the block state.
*/
int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
{
int blk, offset, pl, blktype;
if (nr_blks != dev->blks_per_lun * dev->plane_mode)
return -EINVAL;
for (blk = 0; blk < dev->blks_per_lun; blk++) {
offset = blk * dev->plane_mode;
blktype = blks[offset];
/* Bad blocks on any planes take precedence over other types */
for (pl = 0; pl < dev->plane_mode; pl++) {
if (blks[offset + pl] &
(NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
blktype = blks[offset + pl];
break;
}
}
blks[blk] = blktype;
}
return dev->blks_per_lun;
}
EXPORT_SYMBOL(nvm_bb_tbl_fold);
static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp)
{
int i;