lightnvm: simplify geometry structure

Currently, the device geometry is stored redundantly in the nvm_id and
nvm_geo structures at a device level. Moreover, when instantiating
targets on a specific number of LUNs, these structures are replicated
and manually modified to fit the instance channel and LUN partitioning.

Instead, create a generic geometry around nvm_geo, which can be used by
(i) the underlying device to describe the geometry of the whole device,
and (ii) instances to describe their geometry independently.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 33 insertions, 50 deletions

diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index f0309d8172c0..898c4e49f77d 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -551,21 +551,6 @@ struct pblk_line_meta {
 	unsigned int meta_distance;	/* Distance between data and metadata */
 };
 
-struct pblk_addr_format {
-	u64	ch_mask;
-	u64	lun_mask;
-	u64	pln_mask;
-	u64	blk_mask;
-	u64	pg_mask;
-	u64	sec_mask;
-	u8	ch_offset;
-	u8	lun_offset;
-	u8	pln_offset;
-	u8	blk_offset;
-	u8	pg_offset;
-	u8	sec_offset;
-};
-
 enum {
 	PBLK_STATE_RUNNING = 0,
 	PBLK_STATE_STOPPING = 1,
@@ -585,8 +570,8 @@ struct pblk {
 	struct pblk_line_mgmt l_mg;		/* Line management */
 	struct pblk_line_meta lm;		/* Line metadata */
 
+	struct nvm_addrf ppaf;
 	int ppaf_bitsize;
-	struct pblk_addr_format ppaf;
 
 	struct pblk_rb rwb;
 
@@ -941,14 +926,12 @@ static inline int pblk_line_vsc(struct pblk_line *line)
 	return le32_to_cpu(*line->vsc);
 }
 
-#define NVM_MEM_PAGE_WRITE (8)
-
 static inline int pblk_pad_distance(struct pblk *pblk)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
 	struct nvm_geo *geo = &dev->geo;
 
-	return NVM_MEM_PAGE_WRITE * geo->all_luns * geo->sec_per_pl;
+	return geo->mw_cunits * geo->all_luns * geo->ws_opt;
 }
 
 static inline int pblk_ppa_to_line(struct ppa_addr p)
@@ -964,15 +947,16 @@ static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
 static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
 					      u64 line_id)
 {
+	struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->ppaf;
 	struct ppa_addr ppa;
 
 	ppa.ppa = 0;
 	ppa.g.blk = line_id;
-	ppa.g.pg = (paddr & pblk->ppaf.pg_mask) >> pblk->ppaf.pg_offset;
-	ppa.g.lun = (paddr & pblk->ppaf.lun_mask) >> pblk->ppaf.lun_offset;
-	ppa.g.ch = (paddr & pblk->ppaf.ch_mask) >> pblk->ppaf.ch_offset;
-	ppa.g.pl = (paddr & pblk->ppaf.pln_mask) >> pblk->ppaf.pln_offset;
-	ppa.g.sec = (paddr & pblk->ppaf.sec_mask) >> pblk->ppaf.sec_offset;
+	ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset;
+	ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset;
+	ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset;
+	ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset;
+	ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sect_offset;
 
 	return ppa;
 }
@@ -980,13 +964,14 @@ static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
 static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
 							struct ppa_addr p)
 {
+	struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->ppaf;
 	u64 paddr;
 
-	paddr = (u64)p.g.pg << pblk->ppaf.pg_offset;
-	paddr |= (u64)p.g.lun << pblk->ppaf.lun_offset;
-	paddr |= (u64)p.g.ch << pblk->ppaf.ch_offset;
-	paddr |= (u64)p.g.pl << pblk->ppaf.pln_offset;
-	paddr |= (u64)p.g.sec << pblk->ppaf.sec_offset;
+	paddr = (u64)p.g.ch << ppaf->ch_offset;
+	paddr |= (u64)p.g.lun << ppaf->lun_offset;
+	paddr |= (u64)p.g.pg << ppaf->pg_offset;
+	paddr |= (u64)p.g.pl << ppaf->pln_offset;
+	paddr |= (u64)p.g.sec << ppaf->sect_offset;
 
 	return paddr;
 }
@@ -1003,18 +988,14 @@ static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
 		ppa64.c.line = ppa32 & ((~0U) >> 1);
 		ppa64.c.is_cached = 1;
 	} else {
-		ppa64.g.blk = (ppa32 & pblk->ppaf.blk_mask) >>
-							pblk->ppaf.blk_offset;
-		ppa64.g.pg = (ppa32 & pblk->ppaf.pg_mask) >>
-							pblk->ppaf.pg_offset;
-		ppa64.g.lun = (ppa32 & pblk->ppaf.lun_mask) >>
-							pblk->ppaf.lun_offset;
-		ppa64.g.ch = (ppa32 & pblk->ppaf.ch_mask) >>
-							pblk->ppaf.ch_offset;
-		ppa64.g.pl = (ppa32 & pblk->ppaf.pln_mask) >>
-							pblk->ppaf.pln_offset;
-		ppa64.g.sec = (ppa32 & pblk->ppaf.sec_mask) >>
-							pblk->ppaf.sec_offset;
+		struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->ppaf;
+
+		ppa64.g.ch = (ppa32 & ppaf->ch_mask) >> ppaf->ch_offset;
+		ppa64.g.lun = (ppa32 & ppaf->lun_mask) >> ppaf->lun_offset;
+		ppa64.g.blk = (ppa32 & ppaf->blk_mask) >> ppaf->blk_offset;
+		ppa64.g.pg = (ppa32 & ppaf->pg_mask) >> ppaf->pg_offset;
+		ppa64.g.pl = (ppa32 & ppaf->pln_mask) >> ppaf->pln_offset;
+		ppa64.g.sec = (ppa32 & ppaf->sec_mask) >> ppaf->sect_offset;
 	}
 
 	return ppa64;
@@ -1030,12 +1011,14 @@ static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
 		ppa32 |= ppa64.c.line;
 		ppa32 |= 1U << 31;
 	} else {
-		ppa32 |= ppa64.g.blk << pblk->ppaf.blk_offset;
-		ppa32 |= ppa64.g.pg << pblk->ppaf.pg_offset;
-		ppa32 |= ppa64.g.lun << pblk->ppaf.lun_offset;
-		ppa32 |= ppa64.g.ch << pblk->ppaf.ch_offset;
-		ppa32 |= ppa64.g.pl << pblk->ppaf.pln_offset;
-		ppa32 |= ppa64.g.sec << pblk->ppaf.sec_offset;
+		struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->ppaf;
+
+		ppa32 |= ppa64.g.ch << ppaf->ch_offset;
+		ppa32 |= ppa64.g.lun << ppaf->lun_offset;
+		ppa32 |= ppa64.g.blk << ppaf->blk_offset;
+		ppa32 |= ppa64.g.pg << ppaf->pg_offset;
+		ppa32 |= ppa64.g.pl << ppaf->pln_offset;
+		ppa32 |= ppa64.g.sec << ppaf->sect_offset;
 	}
 
 	return ppa32;
@@ -1229,10 +1212,10 @@ static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
 		if (!ppa->c.is_cached &&
 				ppa->g.ch < geo->nr_chnls &&
 				ppa->g.lun < geo->nr_luns &&
-				ppa->g.pl < geo->nr_planes &&
+				ppa->g.pl < geo->num_pln &&
 				ppa->g.blk < geo->nr_chks &&
-				ppa->g.pg < geo->ws_per_chk &&
-				ppa->g.sec < geo->sec_per_pg)
+				ppa->g.pg < geo->num_pg &&
+				ppa->g.sec < geo->ws_min)
 			continue;
 
 		print_ppa(ppa, "boundary", i);