1 files changed, 214 insertions, 120 deletions

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 7f4b60abdf27..6e0859b9d4d2 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -16,26 +16,58 @@ 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,
+	NVM_OCSSD_SPEC_20 = 20,
+};
 
 struct ppa_addr {
 	/* Generic structure for all addresses */
 	union {
+		/* generic device format */
+		struct {
+			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 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 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;
@@ -49,10 +81,13 @@ struct nvm_rq;
 struct nvm_id;
 struct nvm_dev;
 struct nvm_tgt_dev;
+struct nvm_chk_meta;
 
-typedef int (nvm_id_fn)(struct nvm_dev *, struct nvm_id *);
+typedef int (nvm_id_fn)(struct nvm_dev *);
 typedef int (nvm_op_bb_tbl_fn)(struct nvm_dev *, struct ppa_addr, u8 *);
 typedef int (nvm_op_set_bb_fn)(struct nvm_dev *, struct ppa_addr *, int, int);
+typedef int (nvm_get_chk_meta_fn)(struct nvm_dev *, struct nvm_chk_meta *,
+								sector_t, int);
 typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
 typedef int (nvm_submit_io_sync_fn)(struct nvm_dev *, struct nvm_rq *);
 typedef void *(nvm_create_dma_pool_fn)(struct nvm_dev *, char *);
@@ -66,6 +101,8 @@ struct nvm_dev_ops {
 	nvm_op_bb_tbl_fn	*get_bb_tbl;
 	nvm_op_set_bb_fn	*set_bb_tbl;
 
+	nvm_get_chk_meta_fn	*get_chk_meta;
+
 	nvm_submit_io_fn	*submit_io;
 	nvm_submit_io_sync_fn	*submit_io_sync;
 
@@ -73,8 +110,6 @@ struct nvm_dev_ops {
 	nvm_destroy_dma_pool_fn	*destroy_dma_pool;
 	nvm_dev_dma_alloc_fn	*dev_dma_alloc;
 	nvm_dev_dma_free_fn	*dev_dma_free;
-
-	unsigned int		max_phys_sect;
 };
 
 #ifdef CONFIG_NVM
@@ -154,60 +189,75 @@ struct nvm_id_lp_tbl {
 	struct nvm_id_lp_mlc mlc;
 };
 
-struct nvm_id_group {
-	u8	mtype;
-	u8	fmtype;
-	u8	num_ch;
-	u8	num_lun;
-	u16	num_chk;
-	u16	clba;
-	u16	csecs;
-	u16	sos;
-
-	u16	ws_min;
-	u16	ws_opt;
-	u16	ws_seq;
-	u16	ws_per_chk;
-
-	u32	trdt;
-	u32	trdm;
-	u32	tprt;
-	u32	tprm;
-	u32	tbet;
-	u32	tbem;
-	u32	mpos;
-	u32	mccap;
-	u16	cpar;
-
-	/* 1.2 compatibility */
-	u8	num_pln;
-	u16	num_pg;
-	u16	fpg_sz;
-};
-
-struct nvm_addr_format {
-	u8	ch_offset;
+struct nvm_addrf_12 {
 	u8	ch_len;
-	u8	lun_offset;
 	u8	lun_len;
-	u8	pln_offset;
+	u8	blk_len;
+	u8	pg_len;
 	u8	pln_len;
+	u8	sec_len;
+
+	u8	ch_offset;
+	u8	lun_offset;
 	u8	blk_offset;
-	u8	blk_len;
 	u8	pg_offset;
-	u8	pg_len;
-	u8	sect_offset;
-	u8	sect_len;
+	u8	pln_offset;
+	u8	sec_offset;
+
+	u64	ch_mask;
+	u64	lun_mask;
+	u64	blk_mask;
+	u64	pg_mask;
+	u64	pln_mask;
+	u64	sec_mask;
 };
 
-struct nvm_id {
-	u8	ver_id;
-	u8	vmnt;
-	u32	cap;
-	u32	dom;
-	struct nvm_addr_format ppaf;
-	struct nvm_id_group grp;
-} __packed;
+struct nvm_addrf {
+	u8	ch_len;
+	u8	lun_len;
+	u8	chk_len;
+	u8	sec_len;
+	u8	rsv_len[2];
+
+	u8	ch_offset;
+	u8	lun_offset;
+	u8	chk_offset;
+	u8	sec_offset;
+	u8	rsv_off[2];
+
+	u64	ch_mask;
+	u64	lun_mask;
+	u64	chk_mask;
+	u64	sec_mask;
+	u64	rsv_mask[2];
+};
+
+enum {
+	/* Chunk states */
+	NVM_CHK_ST_FREE =	1 << 0,
+	NVM_CHK_ST_CLOSED =	1 << 1,
+	NVM_CHK_ST_OPEN =	1 << 2,
+	NVM_CHK_ST_OFFLINE =	1 << 3,
+
+	/* Chunk types */
+	NVM_CHK_TP_W_SEQ =	1 << 0,
+	NVM_CHK_TP_W_RAN =	1 << 1,
+	NVM_CHK_TP_SZ_SPEC =	1 << 4,
+};
+
+/*
+ * Note: The structure size is linked to nvme_nvm_chk_meta such that the same
+ * buffer can be used when converting from little endian to cpu addressing.
+ */
+struct nvm_chk_meta {
+	u8	state;
+	u8	type;
+	u8	wi;
+	u8	rsvd[5];
+	u64	slba;
+	u64	cnlb;
+	u64	wp;
+};
 
 struct nvm_target {
 	struct list_head list;
@@ -226,6 +276,8 @@ struct nvm_target {
 #define NVM_VERSION_MINOR 0
 #define NVM_VERSION_PATCH 0
 
+#define NVM_MAX_VLBA (64) /* max logical blocks in a vector command */
+
 struct nvm_rq;
 typedef void (nvm_end_io_fn)(struct nvm_rq *);
 
@@ -272,38 +324,69 @@ enum {
 	NVM_BLK_ST_BAD =	0x8,	/* Bad block */
 };
 
-
-/* Device generic information */
+/* Instance geometry */
 struct nvm_geo {
-	/* generic geometry */
-	int nr_chnls;
-	int all_luns; /* across channels */
-	int nr_luns; /* per channel */
-	int nr_chks; /* per lun */
+	/* device reported version */
+	u8	major_ver_id;
+	u8	minor_ver_id;
+
+	/* kernel short version */
+	u8	version;
 
-	int sec_size;
-	int oob_size;
-	int mccap;
+	/* instance specific geometry */
+	int num_ch;
+	int num_lun;		/* per channel */
 
-	int sec_per_chk;
-	int sec_per_lun;
+	/* calculated values */
+	int all_luns;		/* across channels */
+	int all_chunks;		/* across channels */
 
-	int ws_min;
-	int ws_opt;
-	int ws_seq;
-	int ws_per_chk;
+	int op;			/* over-provision in instance */
 
-	int max_rq_size;
+	sector_t total_secs;	/* across channels */
+
+	/* chunk geometry */
+	u32	num_chk;	/* chunks per lun */
+	u32	clba;		/* sectors per chunk */
+	u16	csecs;		/* sector size */
+	u16	sos;		/* out-of-band area size */
+
+	/* device write constrains */
+	u32	ws_min;		/* minimum write size */
+	u32	ws_opt;		/* optimal write size */
+	u32	mw_cunits;	/* distance required for successful read */
+	u32	maxoc;		/* maximum open chunks */
+	u32	maxocpu;	/* maximum open chunks per parallel unit */
+
+	/* device capabilities */
+	u32	mccap;
+
+	/* device timings */
+	u32	trdt;		/* Avg. Tread (ns) */
+	u32	trdm;		/* Max Tread (ns) */
+	u32	tprt;		/* Avg. Tprog (ns) */
+	u32	tprm;		/* Max Tprog (ns) */
+	u32	tbet;		/* Avg. Terase (ns) */
+	u32	tbem;		/* Max Terase (ns) */
+
+	/* generic address format */
+	struct nvm_addrf addrf;
+
+	/* 1.2 compatibility */
+	u8	vmnt;
+	u32	cap;
+	u32	dom;
 
-	int op;
+	u8	mtype;
+	u8	fmtype;
 
-	struct nvm_addr_format ppaf;
+	u16	cpar;
+	u32	mpos;
 
-	/* Legacy 1.2 specific geometry */
-	int plane_mode; /* drive device in single, double or quad mode */
-	int nr_planes;
-	int sec_per_pg; /* only sectors for a single page */
-	int sec_per_pl; /* all sectors across planes */
+	u8	num_pln;
+	u8	pln_mode;
+	u16	num_pg;
+	u16	fpg_sz;
 };
 
 /* sub-device structure */
@@ -314,9 +397,6 @@ struct nvm_tgt_dev {
 	/* Base ppas for target LUNs */
 	struct ppa_addr *luns;
 
-	sector_t total_secs;
-
-	struct nvm_id identity;
 	struct request_queue *q;
 
 	struct nvm_dev *parent;
@@ -331,13 +411,9 @@ struct nvm_dev {
 	/* Device information */
 	struct nvm_geo geo;
 
-	unsigned long total_secs;
-
 	unsigned long *lun_map;
 	void *dma_pool;
 
-	struct nvm_id identity;
-
 	/* Backend device */
 	struct request_queue *q;
 	char name[DISK_NAME_LEN];
@@ -353,44 +429,58 @@ struct nvm_dev {
 	struct list_head targets;
 };
 
-static inline struct ppa_addr generic_to_dev_addr(struct nvm_tgt_dev *tgt_dev,
+static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
 						  struct ppa_addr r)
 {
-	struct nvm_geo *geo = &tgt_dev->geo;
+	struct nvm_geo *geo = &dev->geo;
 	struct ppa_addr l;
 
-	l.ppa = ((u64)r.g.blk) << geo->ppaf.blk_offset;
-	l.ppa |= ((u64)r.g.pg) << geo->ppaf.pg_offset;
-	l.ppa |= ((u64)r.g.sec) << geo->ppaf.sect_offset;
-	l.ppa |= ((u64)r.g.pl) << geo->ppaf.pln_offset;
-	l.ppa |= ((u64)r.g.lun) << geo->ppaf.lun_offset;
-	l.ppa |= ((u64)r.g.ch) << geo->ppaf.ch_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;
 }
 
-static inline struct ppa_addr dev_to_generic_addr(struct nvm_tgt_dev *tgt_dev,
+static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
 						  struct ppa_addr r)
 {
-	struct nvm_geo *geo = &tgt_dev->geo;
+	struct nvm_geo *geo = &dev->geo;
 	struct ppa_addr l;
 
 	l.ppa = 0;
-	/*
-	 * (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc.
-	 */
-	l.g.blk = (r.ppa >> geo->ppaf.blk_offset) &
-					(((1 << geo->ppaf.blk_len) - 1));
-	l.g.pg |= (r.ppa >> geo->ppaf.pg_offset) &
-					(((1 << geo->ppaf.pg_len) - 1));
-	l.g.sec |= (r.ppa >> geo->ppaf.sect_offset) &
-					(((1 << geo->ppaf.sect_len) - 1));
-	l.g.pl |= (r.ppa >> geo->ppaf.pln_offset) &
-					(((1 << geo->ppaf.pln_len) - 1));
-	l.g.lun |= (r.ppa >> geo->ppaf.lun_offset) &
-					(((1 << geo->ppaf.lun_len) - 1));
-	l.g.ch |= (r.ppa >> geo->ppaf.ch_offset) &
-					(((1 << geo->ppaf.ch_len) - 1));
+
+	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;
 }
@@ -434,9 +524,13 @@ extern struct nvm_dev *nvm_alloc_dev(int);
 extern int nvm_register(struct nvm_dev *);
 extern void nvm_unregister(struct nvm_dev *);
 
+
+extern int nvm_get_chunk_meta(struct nvm_tgt_dev *tgt_dev,
+			      struct nvm_chk_meta *meta, struct ppa_addr ppa,
+			      int nchks);
+
 extern int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr *,
 			      int, int);
-extern int nvm_max_phys_sects(struct nvm_tgt_dev *);
 extern int nvm_submit_io(struct nvm_tgt_dev *, struct nvm_rq *);
 extern int nvm_submit_io_sync(struct nvm_tgt_dev *, struct nvm_rq *);
 extern void nvm_end_io(struct nvm_rq *);