xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

lightnvm: make address conversion functions global

Browse Source 
Targets are assumed to used the same generic ppa format, where the
address is partitioned on ch:lun:block:pg:pl:sec. Thus, make the
function in charge of transforming the ppa address from a linear format
to the generic one available to all targets.

This function will be needed by the media manager in order to do target
mapping translations when targets are divided on different physical
partitions.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Javier González
2016-11-28 22:39:01 +01:00
committed by Jens Axboe
parent 7e4f64a9b3
commit 0e5c3246db
2 changed files with 30 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
include/linux/lightnvm.h
View File

@@ -361,6 +361,36 @@ struct nvm_dev {
spinlock_t lock;
};
static inline struct ppa_addr linear_to_generic_addr(struct nvm_dev *dev,
struct ppa_addr r)
{
struct ppa_addr l;
int secs, pgs, blks, luns;
sector_t ppa = r.ppa;
l.ppa = 0;
div_u64_rem(ppa, dev->sec_per_pg, &secs);
l.g.sec = secs;
sector_div(ppa, dev->sec_per_pg);
div_u64_rem(ppa, dev->pgs_per_blk, &pgs);
l.g.pg = pgs;
sector_div(ppa, dev->pgs_per_blk);
div_u64_rem(ppa, dev->blks_per_lun, &blks);
l.g.blk = blks;
sector_div(ppa, dev->blks_per_lun);
div_u64_rem(ppa, dev->luns_per_chnl, &luns);
l.g.lun = luns;
sector_div(ppa, dev->luns_per_chnl);
l.g.ch = ppa;
return l;
}
static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
struct ppa_addr r)
{