From 694715137482b10d5be83b1dadf9a3cdee2ce1bc Mon Sep 17 00:00:00 2001 From: Javier González Date: Fri, 30 Mar 2018 00:05:15 +0200 Subject: lightnvm: add support for 2.0 address format MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add support for 2.0 address format. Also, align address bits for 1.2 and 2.0 to be able to operate on channel and luns without requiring a format conversion. Use a generic address format for this purpose. Also, convert the generic operations to the generic format in pblk. Signed-off-by: Javier González Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- include/linux/lightnvm.h | 101 ++++++++++++++++++++++++++++++++++------------- 1 file changed, 74 insertions(+), 27 deletions(-) (limited to 'include/linux/lightnvm.h') diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h index 00295d9f9522..f2549b4b8626 100644 --- a/include/linux/lightnvm.h +++ b/include/linux/lightnvm.h @@ -16,12 +16,21 @@ enum { NVM_IOTYPE_GC = 1, }; -#define NVM_BLK_BITS (16) -#define NVM_PG_BITS (16) -#define NVM_SEC_BITS (8) -#define NVM_PL_BITS (8) -#define NVM_LUN_BITS (8) -#define NVM_CH_BITS (7) +/* common format */ +#define NVM_GEN_CH_BITS (8) +#define NVM_GEN_LUN_BITS (8) +#define NVM_GEN_BLK_BITS (16) +#define NVM_GEN_RESERVED (32) + +/* 1.2 format */ +#define NVM_12_PG_BITS (16) +#define NVM_12_PL_BITS (4) +#define NVM_12_SEC_BITS (4) +#define NVM_12_RESERVED (8) + +/* 2.0 format */ +#define NVM_20_SEC_BITS (24) +#define NVM_20_RESERVED (8) enum { NVM_OCSSD_SPEC_12 = 12, @@ -31,16 +40,34 @@ enum { struct ppa_addr { /* Generic structure for all addresses */ union { + /* generic device format */ struct { - u64 blk : NVM_BLK_BITS; - u64 pg : NVM_PG_BITS; - u64 sec : NVM_SEC_BITS; - u64 pl : NVM_PL_BITS; - u64 lun : NVM_LUN_BITS; - u64 ch : NVM_CH_BITS; - u64 reserved : 1; + u64 ch : NVM_GEN_CH_BITS; + u64 lun : NVM_GEN_LUN_BITS; + u64 blk : NVM_GEN_BLK_BITS; + u64 reserved : NVM_GEN_RESERVED; + } a; + + /* 1.2 device format */ + struct { + u64 ch : NVM_GEN_CH_BITS; + u64 lun : NVM_GEN_LUN_BITS; + u64 blk : NVM_GEN_BLK_BITS; + u64 pg : NVM_12_PG_BITS; + u64 pl : NVM_12_PL_BITS; + u64 sec : NVM_12_SEC_BITS; + u64 reserved : NVM_12_RESERVED; } g; + /* 2.0 device format */ + struct { + u64 grp : NVM_GEN_CH_BITS; + u64 pu : NVM_GEN_LUN_BITS; + u64 chk : NVM_GEN_BLK_BITS; + u64 sec : NVM_20_SEC_BITS; + u64 reserved : NVM_20_RESERVED; + } m; + struct { u64 line : 63; u64 is_cached : 1; @@ -374,15 +401,25 @@ static inline struct ppa_addr generic_to_dev_addr(struct nvm_tgt_dev *tgt_dev, struct ppa_addr r) { struct nvm_geo *geo = &tgt_dev->geo; - struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&geo->addrf; struct ppa_addr l; - l.ppa = ((u64)r.g.ch) << ppaf->ch_offset; - l.ppa |= ((u64)r.g.lun) << ppaf->lun_offset; - l.ppa |= ((u64)r.g.blk) << ppaf->blk_offset; - l.ppa |= ((u64)r.g.pg) << ppaf->pg_offset; - l.ppa |= ((u64)r.g.pl) << ppaf->pln_offset; - l.ppa |= ((u64)r.g.sec) << ppaf->sec_offset; + if (geo->version == NVM_OCSSD_SPEC_12) { + struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&geo->addrf; + + l.ppa = ((u64)r.g.ch) << ppaf->ch_offset; + l.ppa |= ((u64)r.g.lun) << ppaf->lun_offset; + l.ppa |= ((u64)r.g.blk) << ppaf->blk_offset; + l.ppa |= ((u64)r.g.pg) << ppaf->pg_offset; + l.ppa |= ((u64)r.g.pl) << ppaf->pln_offset; + l.ppa |= ((u64)r.g.sec) << ppaf->sec_offset; + } else { + struct nvm_addrf *lbaf = &geo->addrf; + + l.ppa = ((u64)r.m.grp) << lbaf->ch_offset; + l.ppa |= ((u64)r.m.pu) << lbaf->lun_offset; + l.ppa |= ((u64)r.m.chk) << lbaf->chk_offset; + l.ppa |= ((u64)r.m.sec) << lbaf->sec_offset; + } return l; } @@ -391,17 +428,27 @@ static inline struct ppa_addr dev_to_generic_addr(struct nvm_tgt_dev *tgt_dev, struct ppa_addr r) { struct nvm_geo *geo = &tgt_dev->geo; - struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&geo->addrf; struct ppa_addr l; l.ppa = 0; - l.g.ch = (r.ppa & ppaf->ch_mask) >> ppaf->ch_offset; - l.g.lun = (r.ppa & ppaf->lun_mask) >> ppaf->lun_offset; - l.g.blk = (r.ppa & ppaf->blk_mask) >> ppaf->blk_offset; - l.g.pg = (r.ppa & ppaf->pg_mask) >> ppaf->pg_offset; - l.g.pl = (r.ppa & ppaf->pln_mask) >> ppaf->pln_offset; - l.g.sec = (r.ppa & ppaf->sec_mask) >> ppaf->sec_offset; + if (geo->version == NVM_OCSSD_SPEC_12) { + struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&geo->addrf; + + l.g.ch = (r.ppa & ppaf->ch_mask) >> ppaf->ch_offset; + l.g.lun = (r.ppa & ppaf->lun_mask) >> ppaf->lun_offset; + l.g.blk = (r.ppa & ppaf->blk_mask) >> ppaf->blk_offset; + l.g.pg = (r.ppa & ppaf->pg_mask) >> ppaf->pg_offset; + l.g.pl = (r.ppa & ppaf->pln_mask) >> ppaf->pln_offset; + l.g.sec = (r.ppa & ppaf->sec_mask) >> ppaf->sec_offset; + } else { + struct nvm_addrf *lbaf = &geo->addrf; + + l.m.grp = (r.ppa & lbaf->ch_mask) >> lbaf->ch_offset; + l.m.pu = (r.ppa & lbaf->lun_mask) >> lbaf->lun_offset; + l.m.chk = (r.ppa & lbaf->chk_mask) >> lbaf->chk_offset; + l.m.sec = (r.ppa & lbaf->sec_mask) >> lbaf->sec_offset; + } return l; } -- cgit v1.2.3