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| author | Igor Konopko <igor.j.konopko@intel.com> | 2018-12-11 20:16:24 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-12-11 20:22:35 +0100 |
| commit | 24828d0536bbedc9b265f2b01ffca99de3f6a7c7 (patch) | |
| tree | bf902aa63b71543db101677c5bfef73b7d757fee /drivers/lightnvm/pblk.h | |
| parent | lightnvm: pblk: add helpers for OOB metadata (diff) | |
| download | linux-24828d0536bbedc9b265f2b01ffca99de3f6a7c7.tar.xz linux-24828d0536bbedc9b265f2b01ffca99de3f6a7c7.zip | |
lightnvm: dynamic DMA pool entry size
Currently lightnvm and pblk uses single DMA pool, for which the entry
size always is equal to PAGE_SIZE. The contents of each entry allocated
from the DMA pool consists of a PPA list (8bytes * 64), leaving
56bytes * 64 space for metadata. Since the metadata field can be bigger,
such as 128 bytes, the static size does not cover this use-case.
This patch adds support for I/O metadata above 56 bytes by changing DMA
pool size based on device meta size and allows pblk to use OOB metadata
>=16B.
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>
Diffstat (limited to 'drivers/lightnvm/pblk.h')
| -rw-r--r-- | drivers/lightnvm/pblk.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index 80f356688803..9087d53d5c25 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -104,7 +104,6 @@ enum { PBLK_RL_LOW = 4 }; -#define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * NVM_MAX_VLBA) #define pblk_dma_ppa_size (sizeof(u64) * NVM_MAX_VLBA) /* write buffer completion context */ @@ -1388,4 +1387,9 @@ static inline struct pblk_sec_meta *pblk_get_meta(struct pblk *pblk, { return meta + pblk->oob_meta_size * index; } + +static inline int pblk_dma_meta_size(struct pblk *pblk) +{ + return pblk->oob_meta_size * NVM_MAX_VLBA; +} #endif /* PBLK_H_ */ |