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Commit 2cf99bbd authored by Javier González's avatar Javier González Committed by Jens Axboe
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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: default avatarJavier González <javier@cnexlabs.com>
Signed-off-by: default avatarMatias Bjørling <mb@lightnvm.io>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent ae14cc04

drivers/lightnvm/pblk.h

+19 −0
Original line number Diff line number Diff line
@@ -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)

{

include/linux/lightnvm.h

+19 −0
Original line number Diff line number Diff line
@@ -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 *,