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From:   "=?UTF-8?q?Javier=20Gonz=C3=A1lez?=" <javier@javigon.com>
To:     mb@lightnvm.io
Cc:     linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
        =?UTF-8?q?Javier=20Gonz=C3=A1lez?= <javier@cnexlabs.com>
Subject: [PATCH 06/12] lightnvm: add support for 2.0 address format
Date:   Fri,  2 Mar 2018 16:21:14 +0100
Message-Id: <1520004080-27760-7-git-send-email-javier@cnexlabs.com>
In-Reply-To: <1520004080-27760-1-git-send-email-javier@cnexlabs.com>
References: <1520004080-27760-1-git-send-email-javier@cnexlabs.com>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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 <javier@cnexlabs.com>
---
 drivers/lightnvm/core.c       |  20 ++++-----
 drivers/lightnvm/pblk-core.c  |  10 ++---
 drivers/lightnvm/pblk-map.c   |   4 +-
 drivers/lightnvm/pblk-sysfs.c |   4 +-
 drivers/lightnvm/pblk.h       |   4 +-
 include/linux/lightnvm.h      | 101 +++++++++++++++++++++++++++++++-----------
 6 files changed, 95 insertions(+), 48 deletions(-)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index b869e3051265..36d76de22dfc 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -194,8 +194,8 @@ static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
 
 		for (j = 0; j < luns_in_chnl; j++) {
 			luns[lunid].ppa = 0;
-			luns[lunid].g.ch = i;
-			luns[lunid++].g.lun = j;
+			luns[lunid].a.ch = i;
+			luns[lunid++].a.lun = j;
 
 			lun_offs[j] = blun;
 			lun_roffs[j + blun] = blun;
@@ -556,22 +556,22 @@ static void nvm_unregister_map(struct nvm_dev *dev)
 static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
 {
 	struct nvm_dev_map *dev_map = tgt_dev->map;
-	struct nvm_ch_map *ch_map = &dev_map->chnls[p->g.ch];
-	int lun_off = ch_map->lun_offs[p->g.lun];
+	struct nvm_ch_map *ch_map = &dev_map->chnls[p->a.ch];
+	int lun_off = ch_map->lun_offs[p->a.lun];
 
-	p->g.ch += ch_map->ch_off;
-	p->g.lun += lun_off;
+	p->a.ch += ch_map->ch_off;
+	p->a.lun += lun_off;
 }
 
 static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
 {
 	struct nvm_dev *dev = tgt_dev->parent;
 	struct nvm_dev_map *dev_rmap = dev->rmap;
-	struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch];
-	int lun_roff = ch_rmap->lun_offs[p->g.lun];
+	struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->a.ch];
+	int lun_roff = ch_rmap->lun_offs[p->a.lun];
 
-	p->g.ch -= ch_rmap->ch_off;
-	p->g.lun -= lun_roff;
+	p->a.ch -= ch_rmap->ch_off;
+	p->a.lun -= lun_roff;
 }
 
 static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev,
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 7d0bd33f11d9..2e10b18b61e3 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -885,7 +885,7 @@ int pblk_line_erase(struct pblk *pblk, struct pblk_line *line)
 		}
 
 		ppa = pblk->luns[bit].bppa; /* set ch and lun */
-		ppa.g.blk = line->id;
+		ppa.a.blk = line->id;
 
 		atomic_dec(&line->left_eblks);
 		WARN_ON(test_and_set_bit(bit, line->erase_bitmap));
@@ -1686,8 +1686,8 @@ static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list,
 	int i;
 
 	for (i = 1; i < nr_ppas; i++)
-		WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun ||
-				ppa_list[0].g.ch != ppa_list[i].g.ch);
+		WARN_ON(ppa_list[0].a.lun != ppa_list[i].a.lun ||
+				ppa_list[0].a.ch != ppa_list[i].a.ch);
 #endif
 
 	ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000));
@@ -1731,8 +1731,8 @@ void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas)
 	int i;
 
 	for (i = 1; i < nr_ppas; i++)
-		WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun ||
-				ppa_list[0].g.ch != ppa_list[i].g.ch);
+		WARN_ON(ppa_list[0].a.lun != ppa_list[i].a.lun ||
+				ppa_list[0].a.ch != ppa_list[i].a.ch);
 #endif
 
 	rlun = &pblk->luns[pos];
diff --git a/drivers/lightnvm/pblk-map.c b/drivers/lightnvm/pblk-map.c
index 04e08d76ea5f..20dbaa89c9df 100644
--- a/drivers/lightnvm/pblk-map.c
+++ b/drivers/lightnvm/pblk-map.c
@@ -127,7 +127,7 @@ void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
 			atomic_dec(&e_line->left_eblks);
 
 			*erase_ppa = rqd->ppa_list[i];
-			erase_ppa->g.blk = e_line->id;
+			erase_ppa->a.blk = e_line->id;
 
 			spin_unlock(&e_line->lock);
 
@@ -168,6 +168,6 @@ void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
 		set_bit(bit, e_line->erase_bitmap);
 		atomic_dec(&e_line->left_eblks);
 		*erase_ppa = pblk->luns[bit].bppa; /* set ch and lun */
-		erase_ppa->g.blk = e_line->id;
+		erase_ppa->a.blk = e_line->id;
 	}
 }
diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c
index 59bbbead4fa2..a4b3c6ca45a3 100644
--- a/drivers/lightnvm/pblk-sysfs.c
+++ b/drivers/lightnvm/pblk-sysfs.c
@@ -39,8 +39,8 @@ static ssize_t pblk_sysfs_luns_show(struct pblk *pblk, char *page)
 		sz += snprintf(page + sz, PAGE_SIZE - sz,
 				"pblk: pos:%d, ch:%d, lun:%d - %d\n",
 					i,
-					rlun->bppa.g.ch,
-					rlun->bppa.g.lun,
+					rlun->bppa.a.ch,
+					rlun->bppa.a.lun,
 					active);
 	}
 
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index dcdad255ccb5..6607c41b23c0 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -936,12 +936,12 @@ static inline int pblk_pad_distance(struct pblk *pblk)
 
 static inline int pblk_ppa_to_line(struct ppa_addr p)
 {
-	return p.g.blk;
+	return p.a.blk;
 }
 
 static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
 {
-	return p.g.lun * geo->num_ch + p.g.ch;
+	return p.a.lun * geo->num_ch + p.a.ch;
 }
 
 static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
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;
 }
-- 
2.7.4