diff options
| author | Javier González <jg@lightnvm.io> | 2017-06-26 12:57:20 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-06-27 01:27:39 +0300 |
| commit | f9c101523da75cd483b95f04c21242bb83960d93 (patch) | |
| tree | a6d20ae407bb1768d844bab613f165617d7ddff3 /drivers/lightnvm/pblk.h | |
| parent | 0880a9aa2d91ff5131ecd0902a758afe760b9c1c (diff) | |
| download | linux-f9c101523da75cd483b95f04c21242bb83960d93.tar.xz | |
lightnvm: pblk: issue multiplane reads if possible
If a read request is sequential and its size aligns with a
multi-plane page size, use the multi-plane hint to process the I/O in
parallel in the controller.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm/pblk.h')
| -rw-r--r-- | drivers/lightnvm/pblk.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index 50f30434718f..6dc58d360077 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -1075,9 +1075,27 @@ static inline int pblk_set_progr_mode(struct pblk *pblk, int type) return flags; } -static inline int pblk_set_read_mode(struct pblk *pblk) +enum { + PBLK_READ_RANDOM = 0, + PBLK_READ_SEQUENTIAL = 1, +}; + +static inline int pblk_set_read_mode(struct pblk *pblk, int type) +{ + struct nvm_tgt_dev *dev = pblk->dev; + struct nvm_geo *geo = &dev->geo; + int flags; + + flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE; + if (type == PBLK_READ_SEQUENTIAL) + flags |= geo->plane_mode >> 1; + + return flags; +} + +static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs) { - return NVM_IO_SNGL_ACCESS | NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE; + return !(nr_secs % pblk->min_write_pgs); } #ifdef CONFIG_NVM_DEBUG |