Re: [PATCH] lightnvm: calculate device values correctly

From: Wenwei Tao
Date: Sun Nov 22 2015 - 09:05:17 EST


I'm a new guy to flash, if I'm wrong about this patch, please correct me.
Thanks.

2015-11-22 21:51 GMT+08:00 Wenwei Tao <ww.tao0320@xxxxxxxxx>:
> In the original calculation, the relationships among
> block, plane and lun was confusing, refine it on the
> basis of Open-channelSSDInterfaceSpecification.
>
> Signed-off-by: Wenwei Tao <ww.tao0320@xxxxxxxxx>
> ---
> drivers/lightnvm/core.c | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
> index f659e60..1864b94 100644
> --- a/drivers/lightnvm/core.c
> +++ b/drivers/lightnvm/core.c
> @@ -174,8 +174,8 @@ static int nvm_core_init(struct nvm_dev *dev)
> dev->nr_chnls = grp->num_ch;
> dev->luns_per_chnl = grp->num_lun;
> dev->pgs_per_blk = grp->num_pg;
> - dev->blks_per_lun = grp->num_blk;
> dev->nr_planes = grp->num_pln;
> + dev->blks_per_lun = grp->num_blk * grp->num_pln;
> dev->sec_size = grp->csecs;
> dev->oob_size = grp->sos;
> dev->sec_per_pg = grp->fpg_sz / grp->csecs;
> @@ -191,13 +191,12 @@ static int nvm_core_init(struct nvm_dev *dev)
> dev->plane_mode = NVM_PLANE_QUAD;
>
> /* calculated values */
> - dev->sec_per_pl = dev->sec_per_pg * dev->nr_planes;
> - dev->sec_per_blk = dev->sec_per_pl * dev->pgs_per_blk;
> + dev->sec_per_blk = dev->sec_per_pg * dev->pgs_per_blk;
> + dev->sec_per_pl = dev->sec_per_blk * grp->num_blk;
> dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun;
> dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls;
>
> - dev->total_blocks = dev->nr_planes *
> - dev->blks_per_lun *
> + dev->total_blocks = dev->blks_per_lun *
> dev->luns_per_chnl *
> dev->nr_chnls;
> dev->total_pages = dev->total_blocks * dev->pgs_per_blk;
> --
> 1.9.1
>
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