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lightnvm: pblk: add helpers for OOB metadata

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pblk currently assumes that size of OOB metadata on drive is always
equal to size of pblk_sec_meta struct. This commit add helpers which will
allow to handle different sizes of OOB metadata on drive in the future.

After this patch only OOB metadata equal to 16 bytes is supported.

Reviewed-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Igor Konopko
2018-12-11 20:16:23 +01:00
committed by Jens Axboe
parent dd439496df
commit faa79f27f0
6 changed files with 69 additions and 32 deletions
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6
drivers/lightnvm/pblk.h
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@@ -634,6 +634,7 @@ struct pblk {
int min_write_pgs; /* Minimum amount of pages required by controller */
int max_write_pgs; /* Maximum amount of pages supported by controller */
int oob_meta_size; /* Size of OOB sector metadata */
sector_t capacity; /* Device capacity when bad blocks are subtracted */
@@ -1380,6 +1381,11 @@ static inline unsigned int pblk_get_min_chks(struct pblk *pblk)
*/
return DIV_ROUND_UP(100, pblk->op) * lm->blk_per_line;
}
static inline struct pblk_sec_meta *pblk_get_meta(struct pblk *pblk,
void *meta, int index)
{
return meta + pblk->oob_meta_size * index;
}
#endif /* PBLK_H_ */