Commit 0e5c3246 authored by Javier González's avatar Javier González Committed by Jens Axboe
Browse files

lightnvm: make address conversion functions global 



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: default avatarJavier González <javier@cnexlabs.com>
Signed-off-by: default avatarMatias Bjørling <m@bjorling.me>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 7e4f64a9

drivers/lightnvm/rrpc.c

+0 −30
Original line number Diff line number Diff line
@@ -136,36 +136,6 @@ static u64 block_to_addr(struct rrpc *rrpc, struct rrpc_block *rblk) 
	return blk->id * rrpc->dev->sec_per_blk;

}



static 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 struct ppa_addr rrpc_ppa_to_gaddr(struct nvm_dev *dev, u64 addr)

{

	struct ppa_addr paddr;

include/linux/lightnvm.h

+30 −0
Original line number Diff line number Diff line
@@ -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)

{

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