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lightnvm: pblk: add helpers for chunk addresses 

Implement helpers to go from ppas to a chunk within a line and an
address within a chunk.

These helpers will be used on the patches adding trace support in pblk,
which will be sent in this window.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Javier González 2018-10-09 13:11:41 +02:00 committed by Jens Axboe
parent ae14cc044b
commit 2cf99bbd10
2 changed files with 38 additions and 0 deletions
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19
drivers/lightnvm/pblk.h
View File

@ -1034,6 +1034,25 @@ static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
return ppa;
}
static inline struct nvm_chk_meta *pblk_dev_ppa_to_chunk(struct pblk *pblk,
struct ppa_addr p)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct pblk_line *line = &pblk->lines[pblk_ppa_to_line(p)];
int pos = pblk_ppa_to_pos(geo, p);
return &line->chks[pos];
}
static inline u64 pblk_dev_ppa_to_chunk_addr(struct pblk *pblk,
struct ppa_addr p)
{
struct nvm_tgt_dev *dev = pblk->dev;
return dev_to_chunk_addr(dev->parent, &pblk->addrf, p);
}
static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
struct ppa_addr p)
{

19
include/linux/lightnvm.h
View File

@ -487,6 +487,25 @@ static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
return l;
}
static inline u64 dev_to_chunk_addr(struct nvm_dev *dev, void *addrf,
struct ppa_addr p)
{
struct nvm_geo *geo = &dev->geo;
u64 caddr;
if (geo->version == NVM_OCSSD_SPEC_12) {
struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)addrf;
caddr = (u64)p.g.pg << ppaf->pg_offset;
caddr |= (u64)p.g.pl << ppaf->pln_offset;
caddr |= (u64)p.g.sec << ppaf->sec_offset;
} else {
caddr = p.m.sec;
}
return caddr;
}
typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
typedef sector_t (nvm_tgt_capacity_fn)(void *);
typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *,