[mirror_ubuntu-jammy-kernel.git] / include / linux / lightnvm.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef NVM_H
#define NVM_H

#include <linux/blkdev.h>
#include <linux/types.h>
#include <uapi/linux/lightnvm.h>

enum {
	NVM_IO_OK = 0,
	NVM_IO_REQUEUE = 1,
	NVM_IO_DONE = 2,
	NVM_IO_ERR = 3,

	NVM_IOTYPE_NONE = 0,
	NVM_IOTYPE_GC = 1,
};

/* 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 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;
		} c;

		u64 ppa;
	};
};

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 *);
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 *, sector_t, int,
							struct nvm_chk_meta *);
typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *, void *);
typedef void *(nvm_create_dma_pool_fn)(struct nvm_dev *, char *, int);
typedef void (nvm_destroy_dma_pool_fn)(void *);
typedef void *(nvm_dev_dma_alloc_fn)(struct nvm_dev *, void *, gfp_t,
								dma_addr_t *);
typedef void (nvm_dev_dma_free_fn)(void *, void*, dma_addr_t);

struct nvm_dev_ops {
	nvm_id_fn		*identity;
	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_create_dma_pool_fn	*create_dma_pool;
	nvm_destroy_dma_pool_fn	*destroy_dma_pool;
	nvm_dev_dma_alloc_fn	*dev_dma_alloc;
	nvm_dev_dma_free_fn	*dev_dma_free;
};

#ifdef CONFIG_NVM

#include <linux/file.h>
#include <linux/dmapool.h>

enum {
	/* HW Responsibilities */
	NVM_RSP_L2P	= 1 << 0,
	NVM_RSP_ECC	= 1 << 1,

	/* Physical Adressing Mode */
	NVM_ADDRMODE_LINEAR	= 0,
	NVM_ADDRMODE_CHANNEL	= 1,

	/* Plane programming mode for LUN */
	NVM_PLANE_SINGLE	= 1,
	NVM_PLANE_DOUBLE	= 2,
	NVM_PLANE_QUAD		= 4,

	/* Status codes */
	NVM_RSP_SUCCESS		= 0x0,
	NVM_RSP_NOT_CHANGEABLE	= 0x1,
	NVM_RSP_ERR_FAILWRITE	= 0x40ff,
	NVM_RSP_ERR_EMPTYPAGE	= 0x42ff,
	NVM_RSP_ERR_FAILECC	= 0x4281,
	NVM_RSP_ERR_FAILCRC	= 0x4004,
	NVM_RSP_WARN_HIGHECC	= 0x4700,

	/* Device opcodes */
	NVM_OP_PWRITE		= 0x91,
	NVM_OP_PREAD		= 0x92,
	NVM_OP_ERASE		= 0x90,

	/* PPA Command Flags */
	NVM_IO_SNGL_ACCESS	= 0x0,
	NVM_IO_DUAL_ACCESS	= 0x1,
	NVM_IO_QUAD_ACCESS	= 0x2,

	/* NAND Access Modes */
	NVM_IO_SUSPEND		= 0x80,
	NVM_IO_SLC_MODE		= 0x100,
	NVM_IO_SCRAMBLE_ENABLE	= 0x200,

	/* Block Types */
	NVM_BLK_T_FREE		= 0x0,
	NVM_BLK_T_BAD		= 0x1,
	NVM_BLK_T_GRWN_BAD	= 0x2,
	NVM_BLK_T_DEV		= 0x4,
	NVM_BLK_T_HOST		= 0x8,

	/* Memory capabilities */
	NVM_ID_CAP_SLC		= 0x1,
	NVM_ID_CAP_CMD_SUSPEND	= 0x2,
	NVM_ID_CAP_SCRAMBLE	= 0x4,
	NVM_ID_CAP_ENCRYPT	= 0x8,

	/* Memory types */
	NVM_ID_FMTYPE_SLC	= 0,
	NVM_ID_FMTYPE_MLC	= 1,

	/* Device capabilities */
	NVM_ID_DCAP_BBLKMGMT	= 0x1,
	NVM_UD_DCAP_ECC		= 0x2,
};

struct nvm_id_lp_mlc {
	u16	num_pairs;
	u8	pairs[886];
};

struct nvm_id_lp_tbl {
	__u8	id[8];
	struct nvm_id_lp_mlc mlc;
};

struct nvm_addrf_12 {
	u8	ch_len;
	u8	lun_len;
	u8	blk_len;
	u8	pg_len;
	u8	pln_len;
	u8	sec_len;

	u8	ch_offset;
	u8	lun_offset;
	u8	blk_offset;
	u8	pg_offset;
	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_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;
	struct nvm_tgt_dev *dev;
	struct nvm_tgt_type *type;
	struct gendisk *disk;
};

#define ADDR_EMPTY (~0ULL)

#define NVM_TARGET_DEFAULT_OP (101)
#define NVM_TARGET_MIN_OP (3)
#define NVM_TARGET_MAX_OP (80)

#define NVM_VERSION_MAJOR 1
#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 *);

struct nvm_rq {
	struct nvm_tgt_dev *dev;

	struct bio *bio;

	union {
		struct ppa_addr ppa_addr;
		dma_addr_t dma_ppa_list;
	};

	struct ppa_addr *ppa_list;

	void *meta_list;
	dma_addr_t dma_meta_list;

	nvm_end_io_fn *end_io;

	uint8_t opcode;
	uint16_t nr_ppas;
	uint16_t flags;

	u64 ppa_status; /* ppa media status */
	int error;

	int is_seq; /* Sequential hint flag. 1.2 only */

	void *private;
};

static inline struct nvm_rq *nvm_rq_from_pdu(void *pdu)
{
	return pdu - sizeof(struct nvm_rq);
}

static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
{
	return rqdata + 1;
}

static inline struct ppa_addr *nvm_rq_to_ppa_list(struct nvm_rq *rqd)
{
	return (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
}

enum {
	NVM_BLK_ST_FREE =	0x1,	/* Free block */
	NVM_BLK_ST_TGT =	0x2,	/* Block in use by target */
	NVM_BLK_ST_BAD =	0x8,	/* Bad block */
};

/* Instance geometry */
struct nvm_geo {
	/* device reported version */
	u8	major_ver_id;
	u8	minor_ver_id;

	/* kernel short version */
	u8	version;

	/* instance specific geometry */
	int num_ch;
	int num_lun;		/* per channel */

	/* calculated values */
	int all_luns;		/* across channels */
	int all_chunks;		/* across channels */

	int op;			/* over-provision in instance */

	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 */
	bool	ext;		/* metadata in extended data buffer */
	u32	mdts;		/* Max data transfer 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;

	u8	mtype;
	u8	fmtype;

	u16	cpar;
	u32	mpos;

	u8	num_pln;
	u8	pln_mode;
	u16	num_pg;
	u16	fpg_sz;
};

/* sub-device structure */
struct nvm_tgt_dev {
	/* Device information */
	struct nvm_geo geo;

	/* Base ppas for target LUNs */
	struct ppa_addr *luns;

	struct request_queue *q;

	struct nvm_dev *parent;
	void *map;
};

struct nvm_dev {
	struct nvm_dev_ops *ops;

	struct list_head devices;

	/* Device information */
	struct nvm_geo geo;

	unsigned long *lun_map;
	void *dma_pool;

	/* Backend device */
	struct request_queue *q;
	char name[DISK_NAME_LEN];
	void *private_data;

	struct kref ref;
	void *rmap;

	struct mutex mlock;
	spinlock_t lock;

	/* target management */
	struct list_head area_list;
	struct list_head targets;
};

static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
						  struct ppa_addr r)
{
	struct nvm_geo *geo = &dev->geo;
	struct ppa_addr l;

	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_dev *dev,
						  struct ppa_addr r)
{
	struct nvm_geo *geo = &dev->geo;
	struct ppa_addr l;

	l.ppa = 0;

	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;
}

static inline u64 dev_to_chunk_addr(struct nvm_dev *dev, void *addrf,
				    struct ppa_addr p)
{
	struct nvm_geo *geo = &dev->geo;
	u64 caddr;

	if (geo->version == NVM_OCSSD_SPEC_12) {
		struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)addrf;

		caddr = (u64)p.g.pg << ppaf->pg_offset;
		caddr |= (u64)p.g.pl << ppaf->pln_offset;
		caddr |= (u64)p.g.sec << ppaf->sec_offset;
	} else {
		caddr = p.m.sec;
	}

	return caddr;
}

static inline struct ppa_addr nvm_ppa32_to_ppa64(struct nvm_dev *dev,
						 void *addrf, u32 ppa32)
{
	struct ppa_addr ppa64;

	ppa64.ppa = 0;

	if (ppa32 == -1) {
		ppa64.ppa = ADDR_EMPTY;
	} else if (ppa32 & (1U << 31)) {
		ppa64.c.line = ppa32 & ((~0U) >> 1);
		ppa64.c.is_cached = 1;
	} else {
		struct nvm_geo *geo = &dev->geo;

		if (geo->version == NVM_OCSSD_SPEC_12) {
			struct nvm_addrf_12 *ppaf = addrf;

			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->sec_offset;
		} else {
			struct nvm_addrf *lbaf = addrf;

			ppa64.m.grp = (ppa32 & lbaf->ch_mask) >>
							lbaf->ch_offset;
			ppa64.m.pu = (ppa32 & lbaf->lun_mask) >>
							lbaf->lun_offset;
			ppa64.m.chk = (ppa32 & lbaf->chk_mask) >>
							lbaf->chk_offset;
			ppa64.m.sec = (ppa32 & lbaf->sec_mask) >>
							lbaf->sec_offset;
		}
	}

	return ppa64;
}

static inline u32 nvm_ppa64_to_ppa32(struct nvm_dev *dev,
				     void *addrf, struct ppa_addr ppa64)
{
	u32 ppa32 = 0;

	if (ppa64.ppa == ADDR_EMPTY) {
		ppa32 = ~0U;
	} else if (ppa64.c.is_cached) {
		ppa32 |= ppa64.c.line;
		ppa32 |= 1U << 31;
	} else {
		struct nvm_geo *geo = &dev->geo;

		if (geo->version == NVM_OCSSD_SPEC_12) {
			struct nvm_addrf_12 *ppaf = addrf;

			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->sec_offset;
		} else {
			struct nvm_addrf *lbaf = addrf;

			ppa32 |= ppa64.m.grp << lbaf->ch_offset;
			ppa32 |= ppa64.m.pu << lbaf->lun_offset;
			ppa32 |= ppa64.m.chk << lbaf->chk_offset;
			ppa32 |= ppa64.m.sec << lbaf->sec_offset;
		}
	}

	return ppa32;
}

static inline int nvm_next_ppa_in_chk(struct nvm_tgt_dev *dev,
				      struct ppa_addr *ppa)
{
	struct nvm_geo *geo = &dev->geo;
	int last = 0;

	if (geo->version == NVM_OCSSD_SPEC_12) {
		int sec = ppa->g.sec;

		sec++;
		if (sec == geo->ws_min) {
			int pg = ppa->g.pg;

			sec = 0;
			pg++;
			if (pg == geo->num_pg) {
				int pl = ppa->g.pl;

				pg = 0;
				pl++;
				if (pl == geo->num_pln)
					last = 1;

				ppa->g.pl = pl;
			}
			ppa->g.pg = pg;
		}
		ppa->g.sec = sec;
	} else {
		ppa->m.sec++;
		if (ppa->m.sec == geo->clba)
			last = 1;
	}

	return last;
}

typedef sector_t (nvm_tgt_capacity_fn)(void *);
typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *,
				int flags);
typedef void (nvm_tgt_exit_fn)(void *, bool);
typedef int (nvm_tgt_sysfs_init_fn)(struct gendisk *);
typedef void (nvm_tgt_sysfs_exit_fn)(struct gendisk *);

enum {
	NVM_TGT_F_DEV_L2P = 0,
	NVM_TGT_F_HOST_L2P = 1 << 0,
};

struct nvm_tgt_type {
	const char *name;
	unsigned int version[3];
	int flags;

	/* target entry points */
	const struct block_device_operations *bops;
	nvm_tgt_capacity_fn *capacity;

	/* module-specific init/teardown */
	nvm_tgt_init_fn *init;
	nvm_tgt_exit_fn *exit;

	/* sysfs */
	nvm_tgt_sysfs_init_fn *sysfs_init;
	nvm_tgt_sysfs_exit_fn *sysfs_exit;

	/* For internal use */
	struct list_head list;
	struct module *owner;
};

extern int nvm_register_tgt_type(struct nvm_tgt_type *);
extern void nvm_unregister_tgt_type(struct nvm_tgt_type *);

extern void *nvm_dev_dma_alloc(struct nvm_dev *, gfp_t, dma_addr_t *);
extern void nvm_dev_dma_free(struct nvm_dev *, void *, dma_addr_t);

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 *, struct ppa_addr,
			      int, struct nvm_chk_meta *);
extern int nvm_set_chunk_meta(struct nvm_tgt_dev *, struct ppa_addr *,
			      int, int);
extern int nvm_submit_io(struct nvm_tgt_dev *, struct nvm_rq *, void *);
extern int nvm_submit_io_sync(struct nvm_tgt_dev *, struct nvm_rq *, void *);
extern void nvm_end_io(struct nvm_rq *);

#else /* CONFIG_NVM */
struct nvm_dev_ops;

static inline struct nvm_dev *nvm_alloc_dev(int node)
{
	return ERR_PTR(-EINVAL);
}
static inline int nvm_register(struct nvm_dev *dev)
{
	return -EINVAL;
}
static inline void nvm_unregister(struct nvm_dev *dev) {}
#endif /* CONFIG_NVM */
#endif /* LIGHTNVM.H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
cd9e9808 MB	2	#ifndef NVM_H
	3	#define NVM_H
	4
b76eb20b	5	#include <linux/blkdev.h>
a7fd9a4f	6	#include <linux/types.h>
b76eb20b	7	#include <uapi/linux/lightnvm.h>
a7fd9a4f	8
cd9e9808 MB	9	enum {
	10	NVM_IO_OK = 0,
	11	NVM_IO_REQUEUE = 1,
	12	NVM_IO_DONE = 2,
	13	NVM_IO_ERR = 3,
	14
	15	NVM_IOTYPE_NONE = 0,
	16	NVM_IOTYPE_GC = 1,
	17	};
	18
69471513 JG	19	/* common format */
	20	#define NVM_GEN_CH_BITS (8)
	21	#define NVM_GEN_LUN_BITS (8)
	22	#define NVM_GEN_BLK_BITS (16)
	23	#define NVM_GEN_RESERVED (32)
	24
	25	/* 1.2 format */
	26	#define NVM_12_PG_BITS (16)
	27	#define NVM_12_PL_BITS (4)
	28	#define NVM_12_SEC_BITS (4)
	29	#define NVM_12_RESERVED (8)
	30
	31	/* 2.0 format */
	32	#define NVM_20_SEC_BITS (24)
	33	#define NVM_20_RESERVED (8)
a7fd9a4f	34
f1d4e812 JG	35	enum {
	36	NVM_OCSSD_SPEC_12 = 12,
	37	NVM_OCSSD_SPEC_20 = 20,
	38	};
	39
a7fd9a4f JA	40	struct ppa_addr {
	41	/* Generic structure for all addresses */
	42	union {
69471513	43	/* generic device format */
a7fd9a4f	44	struct {
69471513 JG	45	u64 ch : NVM_GEN_CH_BITS;
	46	u64 lun : NVM_GEN_LUN_BITS;
	47	u64 blk : NVM_GEN_BLK_BITS;
	48	u64 reserved : NVM_GEN_RESERVED;
	49	} a;
	50
	51	/* 1.2 device format */
	52	struct {
	53	u64 ch : NVM_GEN_CH_BITS;
	54	u64 lun : NVM_GEN_LUN_BITS;
	55	u64 blk : NVM_GEN_BLK_BITS;
	56	u64 pg : NVM_12_PG_BITS;
	57	u64 pl : NVM_12_PL_BITS;
	58	u64 sec : NVM_12_SEC_BITS;
	59	u64 reserved : NVM_12_RESERVED;
a7fd9a4f JA	60	} g;
a7fd9a4f JA	61
69471513 JG	62	/* 2.0 device format */
	63	struct {
	64	u64 grp : NVM_GEN_CH_BITS;
	65	u64 pu : NVM_GEN_LUN_BITS;
	66	u64 chk : NVM_GEN_BLK_BITS;
	67	u64 sec : NVM_20_SEC_BITS;
	68	u64 reserved : NVM_20_RESERVED;
	69	} m;
	70
df414b33 MB	71	struct {
	72	u64 line : 63;
	73	u64 is_cached : 1;
	74	} c;
	75
a7fd9a4f JA	76	u64 ppa;
	77	};
	78	};
	79
	80	struct nvm_rq;
	81	struct nvm_id;
	82	struct nvm_dev;
8e53624d	83	struct nvm_tgt_dev;
a294c199	84	struct nvm_chk_meta;
a7fd9a4f	85
e46f4e48	86	typedef int (nvm_id_fn)(struct nvm_dev *);
e11903f5	87	typedef int (nvm_op_bb_tbl_fn)(struct nvm_dev , struct ppa_addr, u8 );
00ee6cc3	88	typedef int (nvm_op_set_bb_fn)(struct nvm_dev , struct ppa_addr , int, int);
aff3fb18 MB	89	typedef int (nvm_get_chk_meta_fn)(struct nvm_dev *, sector_t, int,
aff3fb18 MB	90	struct nvm_chk_meta *);
48e5da72	91	typedef int (nvm_submit_io_fn)(struct nvm_dev , struct nvm_rq , void *);
24828d05	92	typedef void (nvm_create_dma_pool_fn)(struct nvm_dev , char *, int);
a7fd9a4f JA	93	typedef void (nvm_destroy_dma_pool_fn)(void *);
	94	typedef void (nvm_dev_dma_alloc_fn)(struct nvm_dev , void *, gfp_t,
	95	dma_addr_t *);
	96	typedef void (nvm_dev_dma_free_fn)(void , void, dma_addr_t);
	97
	98	struct nvm_dev_ops {
	99	nvm_id_fn *identity;
a7fd9a4f JA	100	nvm_op_bb_tbl_fn *get_bb_tbl;
	101	nvm_op_set_bb_fn *set_bb_tbl;
	102
a294c199 JG	103	nvm_get_chk_meta_fn *get_chk_meta;
a294c199 JG	104
a7fd9a4f	105	nvm_submit_io_fn *submit_io;
a7fd9a4f JA	106
	107	nvm_create_dma_pool_fn *create_dma_pool;
	108	nvm_destroy_dma_pool_fn *destroy_dma_pool;
	109	nvm_dev_dma_alloc_fn *dev_dma_alloc;
	110	nvm_dev_dma_free_fn *dev_dma_free;
a7fd9a4f JA	111	};
a7fd9a4f JA	112
cd9e9808 MB	113	#ifdef CONFIG_NVM
cd9e9808 MB	114
cd9e9808 MB	115	#include <linux/file.h>
	116	#include <linux/dmapool.h>
	117
	118	enum {
	119	/* HW Responsibilities */
	120	NVM_RSP_L2P = 1 << 0,
	121	NVM_RSP_ECC = 1 << 1,
	122
	123	/* Physical Adressing Mode */
	124	NVM_ADDRMODE_LINEAR = 0,
	125	NVM_ADDRMODE_CHANNEL = 1,
	126
	127	/* Plane programming mode for LUN */
d5bdec8d MB	128	NVM_PLANE_SINGLE = 1,
	129	NVM_PLANE_DOUBLE = 2,
	130	NVM_PLANE_QUAD = 4,
cd9e9808 MB	131
	132	/* Status codes */
	133	NVM_RSP_SUCCESS = 0x0,
	134	NVM_RSP_NOT_CHANGEABLE = 0x1,
	135	NVM_RSP_ERR_FAILWRITE = 0x40ff,
	136	NVM_RSP_ERR_EMPTYPAGE = 0x42ff,
402ab9a8	137	NVM_RSP_ERR_FAILECC = 0x4281,
38ea2f76	138	NVM_RSP_ERR_FAILCRC = 0x4004,
402ab9a8	139	NVM_RSP_WARN_HIGHECC = 0x4700,
cd9e9808 MB	140
cd9e9808 MB	141	/* Device opcodes */
cd9e9808 MB	142	NVM_OP_PWRITE = 0x91,
	143	NVM_OP_PREAD = 0x92,
	144	NVM_OP_ERASE = 0x90,
	145
	146	/* PPA Command Flags */
	147	NVM_IO_SNGL_ACCESS = 0x0,
	148	NVM_IO_DUAL_ACCESS = 0x1,
	149	NVM_IO_QUAD_ACCESS = 0x2,
	150
57b4bd06	151	/* NAND Access Modes */
cd9e9808 MB	152	NVM_IO_SUSPEND = 0x80,
cd9e9808 MB	153	NVM_IO_SLC_MODE = 0x100,
a7737f39	154	NVM_IO_SCRAMBLE_ENABLE = 0x200,
57b4bd06 MB	155
	156	/* Block Types */
	157	NVM_BLK_T_FREE = 0x0,
	158	NVM_BLK_T_BAD = 0x1,
b5d4acd4 MB	159	NVM_BLK_T_GRWN_BAD = 0x2,
	160	NVM_BLK_T_DEV = 0x4,
	161	NVM_BLK_T_HOST = 0x8,
f9a99950 MB	162
	163	/* Memory capabilities */
	164	NVM_ID_CAP_SLC = 0x1,
	165	NVM_ID_CAP_CMD_SUSPEND = 0x2,
	166	NVM_ID_CAP_SCRAMBLE = 0x4,
	167	NVM_ID_CAP_ENCRYPT = 0x8,
ca5927e7 MB	168
	169	/* Memory types */
	170	NVM_ID_FMTYPE_SLC = 0,
	171	NVM_ID_FMTYPE_MLC = 1,
bf643185 MB	172
	173	/* Device capabilities */
	174	NVM_ID_DCAP_BBLKMGMT = 0x1,
	175	NVM_UD_DCAP_ECC = 0x2,
ca5927e7 MB	176	};
	177
	178	struct nvm_id_lp_mlc {
	179	u16 num_pairs;
	180	u8 pairs[886];
	181	};
	182
	183	struct nvm_id_lp_tbl {
	184	__u8 id[8];
	185	struct nvm_id_lp_mlc mlc;
cd9e9808 MB	186	};
cd9e9808 MB	187
e46f4e48	188	struct nvm_addrf_12 {
c6ac3f35	189	u8 ch_len;
c6ac3f35	190	u8 lun_len;
c6ac3f35	191	u8 blk_len;
c6ac3f35	192	u8 pg_len;
e46f4e48	193	u8 pln_len;
a40afad9	194	u8 sec_len;
c6ac3f35	195
e46f4e48 JG	196	u8 ch_offset;
	197	u8 lun_offset;
	198	u8 blk_offset;
	199	u8 pg_offset;
	200	u8 pln_offset;
a40afad9	201	u8 sec_offset;
fae7fae4	202
e46f4e48 JG	203	u64 ch_mask;
	204	u64 lun_mask;
	205	u64 blk_mask;
	206	u64 pg_mask;
	207	u64 pln_mask;
	208	u64 sec_mask;
	209	};
62771fe0	210
e46f4e48 JG	211	struct nvm_addrf {
	212	u8 ch_len;
	213	u8 lun_len;
	214	u8 chk_len;
	215	u8 sec_len;
	216	u8 rsv_len[2];
c6ac3f35	217
e46f4e48 JG	218	u8 ch_offset;
	219	u8 lun_offset;
	220	u8 chk_offset;
	221	u8 sec_offset;
	222	u8 rsv_off[2];
	223
	224	u64 ch_mask;
	225	u64 lun_mask;
	226	u64 chk_mask;
	227	u64 sec_mask;
	228	u64 rsv_mask[2];
	229	};
cd9e9808	230
32ef9412 JG	231	enum {
	232	/* Chunk states */
	233	NVM_CHK_ST_FREE = 1 << 0,
	234	NVM_CHK_ST_CLOSED = 1 << 1,
	235	NVM_CHK_ST_OPEN = 1 << 2,
	236	NVM_CHK_ST_OFFLINE = 1 << 3,
	237
	238	/* Chunk types */
	239	NVM_CHK_TP_W_SEQ = 1 << 0,
	240	NVM_CHK_TP_W_RAN = 1 << 1,
	241	NVM_CHK_TP_SZ_SPEC = 1 << 4,
	242	};
	243
a294c199 JG	244	/*
	245	* Note: The structure size is linked to nvme_nvm_chk_meta such that the same
	246	* buffer can be used when converting from little endian to cpu addressing.
	247	*/
	248	struct nvm_chk_meta {
	249	u8 state;
	250	u8 type;
	251	u8 wi;
	252	u8 rsvd[5];
	253	u64 slba;
	254	u64 cnlb;
	255	u64 wp;
	256	};
	257
cd9e9808 MB	258	struct nvm_target {
cd9e9808 MB	259	struct list_head list;
8e79b5cb	260	struct nvm_tgt_dev *dev;
cd9e9808 MB	261	struct nvm_tgt_type *type;
	262	struct gendisk *disk;
	263	};
	264
cd9e9808 MB	265	#define ADDR_EMPTY (~0ULL)
cd9e9808 MB	266
e5392739 JG	267	#define NVM_TARGET_DEFAULT_OP (101)
	268	#define NVM_TARGET_MIN_OP (3)
	269	#define NVM_TARGET_MAX_OP (80)
	270
cd9e9808 MB	271	#define NVM_VERSION_MAJOR 1
	272	#define NVM_VERSION_MINOR 0
	273	#define NVM_VERSION_PATCH 0
	274
89a09c56 MB	275	#define NVM_MAX_VLBA (64) /* max logical blocks in a vector command */
89a09c56 MB	276
91276162	277	struct nvm_rq;
72d256ec	278	typedef void (nvm_end_io_fn)(struct nvm_rq *);
91276162	279
cd9e9808	280	struct nvm_rq {
8e53624d	281	struct nvm_tgt_dev *dev;
cd9e9808 MB	282
	283	struct bio *bio;
	284
	285	union {
	286	struct ppa_addr ppa_addr;
	287	dma_addr_t dma_ppa_list;
	288	};
	289
	290	struct ppa_addr *ppa_list;
	291
003fad37 JG	292	void *meta_list;
003fad37 JG	293	dma_addr_t dma_meta_list;
cd9e9808	294
91276162 MB	295	nvm_end_io_fn *end_io;
91276162 MB	296
cd9e9808	297	uint8_t opcode;
6d5be959	298	uint16_t nr_ppas;
cd9e9808	299	uint16_t flags;
72d256ec	300
9f867268	301	u64 ppa_status; /* ppa media status */
72d256ec	302	int error;
06894efe	303
d7b68016 MB	304	int is_seq; /* Sequential hint flag. 1.2 only */
d7b68016 MB	305
06894efe	306	void *private;
cd9e9808 MB	307	};
	308
	309	static inline struct nvm_rq nvm_rq_from_pdu(void pdu)
	310	{
	311	return pdu - sizeof(struct nvm_rq);
	312	}
	313
	314	static inline void nvm_rq_to_pdu(struct nvm_rq rqdata)
	315	{
	316	return rqdata + 1;
	317	}
	318
d68a9344 HH	319	static inline struct ppa_addr nvm_rq_to_ppa_list(struct nvm_rq rqd)
	320	{
	321	return (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
	322	}
	323
ff0e498b JG	324	enum {
ff0e498b JG	325	NVM_BLK_ST_FREE = 0x1, /* Free block */
077d2389	326	NVM_BLK_ST_TGT = 0x2, /* Block in use by target */
ff0e498b	327	NVM_BLK_ST_BAD = 0x8, /* Bad block */
cd9e9808 MB	328	};
cd9e9808 MB	329
e46f4e48	330	/* Instance geometry */
8e79b5cb	331	struct nvm_geo {
e46f4e48	332	/* device reported version */
3cb98f84 JG	333	u8 major_ver_id;
3cb98f84 JG	334	u8 minor_ver_id;
e46f4e48	335
f1d4e812 JG	336	/* kernel short version */
	337	u8 version;
	338
e46f4e48	339	/* instance specific geometry */
a40afad9 JG	340	int num_ch;
a40afad9 JG	341	int num_lun; /* per channel */
fae7fae4	342
e46f4e48 JG	343	/* calculated values */
	344	int all_luns; /* across channels */
	345	int all_chunks; /* across channels */
	346
	347	int op; /* over-provision in instance */
	348
	349	sector_t total_secs; /* across channels */
	350
	351	/* chunk geometry */
a40afad9	352	u32 num_chk; /* chunks per lun */
e46f4e48 JG	353	u32 clba; /* sectors per chunk */
	354	u16 csecs; /* sector size */
	355	u16 sos; /* out-of-band area size */
a16816b9	356	bool ext; /* metadata in extended data buffer */
a14669eb	357	u32 mdts; /* Max data transfer size*/
cd9e9808	358
e46f4e48 JG	359	/* device write constrains */
	360	u32 ws_min; /* minimum write size */
	361	u32 ws_opt; /* optimal write size */
	362	u32 mw_cunits; /* distance required for successful read */
3f48021b JG	363	u32 maxoc; /* maximum open chunks */
3f48021b JG	364	u32 maxocpu; /* maximum open chunks per parallel unit */
fae7fae4	365
e46f4e48 JG	366	/* device capabilities */
e46f4e48 JG	367	u32 mccap;
fae7fae4	368
e46f4e48 JG	369	/* device timings */
	370	u32 trdt; /* Avg. Tread (ns) */
	371	u32 trdm; /* Max Tread (ns) */
	372	u32 tprt; /* Avg. Tprog (ns) */
	373	u32 tprm; /* Max Tprog (ns) */
	374	u32 tbet; /* Avg. Terase (ns) */
	375	u32 tbem; /* Max Terase (ns) */
e5392739	376
e46f4e48 JG	377	/* generic address format */
e46f4e48 JG	378	struct nvm_addrf addrf;
fae7fae4	379
e46f4e48 JG	380	/* 1.2 compatibility */
	381	u8 vmnt;
	382	u32 cap;
	383	u32 dom;
	384
	385	u8 mtype;
	386	u8 fmtype;
	387
	388	u16 cpar;
	389	u32 mpos;
	390
	391	u8 num_pln;
a40afad9	392	u8 pln_mode;
e46f4e48 JG	393	u16 num_pg;
e46f4e48 JG	394	u16 fpg_sz;
8e79b5cb JG	395	};
8e79b5cb JG	396
ade69e24	397	/* sub-device structure */
8e79b5cb JG	398	struct nvm_tgt_dev {
	399	/* Device information */
	400	struct nvm_geo geo;
	401
8e53624d JG	402	/* Base ppas for target LUNs */
	403	struct ppa_addr *luns;
	404
8e79b5cb JG	405	struct request_queue *q;
8e79b5cb JG	406
959e911b	407	struct nvm_dev *parent;
8e53624d	408	void *map;
8e79b5cb JG	409	};
	410
	411	struct nvm_dev {
	412	struct nvm_dev_ops *ops;
	413
	414	struct list_head devices;
	415
8e79b5cb JG	416	/* Device information */
8e79b5cb JG	417	struct nvm_geo geo;
cd9e9808	418
da1e2849	419	unsigned long *lun_map;
75b85649	420	void *dma_pool;
cd9e9808	421
cd9e9808 MB	422	/* Backend device */
	423	struct request_queue *q;
	424	char name[DISK_NAME_LEN];
40267efd	425	void *private_data;
e3eb3799	426
e69397ea	427	struct kref ref;
8e53624d JG	428	void *rmap;
8e53624d JG	429
e3eb3799	430	struct mutex mlock;
4c9dacb8	431	spinlock_t lock;
ade69e24 MB	432
	433	/* target management */
	434	struct list_head area_list;
	435	struct list_head targets;
cd9e9808 MB	436	};
cd9e9808 MB	437
7100d50a	438	static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
dab8ee9e	439	struct ppa_addr r)
cd9e9808	440	{
7100d50a	441	struct nvm_geo *geo = &dev->geo;
cd9e9808 MB	442	struct ppa_addr l;
cd9e9808 MB	443
69471513 JG	444	if (geo->version == NVM_OCSSD_SPEC_12) {
	445	struct nvm_addrf_12 ppaf = (struct nvm_addrf_12 )&geo->addrf;
	446
	447	l.ppa = ((u64)r.g.ch) << ppaf->ch_offset;
	448	l.ppa \|= ((u64)r.g.lun) << ppaf->lun_offset;
	449	l.ppa \|= ((u64)r.g.blk) << ppaf->blk_offset;
	450	l.ppa \|= ((u64)r.g.pg) << ppaf->pg_offset;
	451	l.ppa \|= ((u64)r.g.pl) << ppaf->pln_offset;
	452	l.ppa \|= ((u64)r.g.sec) << ppaf->sec_offset;
	453	} else {
	454	struct nvm_addrf *lbaf = &geo->addrf;
	455
	456	l.ppa = ((u64)r.m.grp) << lbaf->ch_offset;
	457	l.ppa \|= ((u64)r.m.pu) << lbaf->lun_offset;
	458	l.ppa \|= ((u64)r.m.chk) << lbaf->chk_offset;
	459	l.ppa \|= ((u64)r.m.sec) << lbaf->sec_offset;
	460	}
cd9e9808 MB	461
	462	return l;
	463	}
	464
7100d50a	465	static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
dab8ee9e	466	struct ppa_addr r)
cd9e9808	467	{
7100d50a	468	struct nvm_geo *geo = &dev->geo;
cd9e9808 MB	469	struct ppa_addr l;
cd9e9808 MB	470
5389a1df	471	l.ppa = 0;
e46f4e48	472
69471513 JG	473	if (geo->version == NVM_OCSSD_SPEC_12) {
	474	struct nvm_addrf_12 ppaf = (struct nvm_addrf_12 )&geo->addrf;
	475
	476	l.g.ch = (r.ppa & ppaf->ch_mask) >> ppaf->ch_offset;
	477	l.g.lun = (r.ppa & ppaf->lun_mask) >> ppaf->lun_offset;
	478	l.g.blk = (r.ppa & ppaf->blk_mask) >> ppaf->blk_offset;
	479	l.g.pg = (r.ppa & ppaf->pg_mask) >> ppaf->pg_offset;
	480	l.g.pl = (r.ppa & ppaf->pln_mask) >> ppaf->pln_offset;
	481	l.g.sec = (r.ppa & ppaf->sec_mask) >> ppaf->sec_offset;
	482	} else {
	483	struct nvm_addrf *lbaf = &geo->addrf;
	484
	485	l.m.grp = (r.ppa & lbaf->ch_mask) >> lbaf->ch_offset;
	486	l.m.pu = (r.ppa & lbaf->lun_mask) >> lbaf->lun_offset;
	487	l.m.chk = (r.ppa & lbaf->chk_mask) >> lbaf->chk_offset;
	488	l.m.sec = (r.ppa & lbaf->sec_mask) >> lbaf->sec_offset;
	489	}
cd9e9808 MB	490
	491	return l;
	492	}
	493
2cf99bbd JG	494	static inline u64 dev_to_chunk_addr(struct nvm_dev dev, void addrf,
	495	struct ppa_addr p)
	496	{
	497	struct nvm_geo *geo = &dev->geo;
	498	u64 caddr;
	499
	500	if (geo->version == NVM_OCSSD_SPEC_12) {
	501	struct nvm_addrf_12 ppaf = (struct nvm_addrf_12 )addrf;
	502
	503	caddr = (u64)p.g.pg << ppaf->pg_offset;
	504	caddr \|= (u64)p.g.pl << ppaf->pln_offset;
	505	caddr \|= (u64)p.g.sec << ppaf->sec_offset;
	506	} else {
	507	caddr = p.m.sec;
	508	}
	509
	510	return caddr;
	511	}
	512
7f985f9a JG	513	static inline struct ppa_addr nvm_ppa32_to_ppa64(struct nvm_dev *dev,
	514	void *addrf, u32 ppa32)
	515	{
	516	struct ppa_addr ppa64;
	517
	518	ppa64.ppa = 0;
	519
	520	if (ppa32 == -1) {
	521	ppa64.ppa = ADDR_EMPTY;
	522	} else if (ppa32 & (1U << 31)) {
	523	ppa64.c.line = ppa32 & ((~0U) >> 1);
	524	ppa64.c.is_cached = 1;
	525	} else {
	526	struct nvm_geo *geo = &dev->geo;
	527
	528	if (geo->version == NVM_OCSSD_SPEC_12) {
	529	struct nvm_addrf_12 *ppaf = addrf;
	530
	531	ppa64.g.ch = (ppa32 & ppaf->ch_mask) >>
	532	ppaf->ch_offset;
	533	ppa64.g.lun = (ppa32 & ppaf->lun_mask) >>
	534	ppaf->lun_offset;
	535	ppa64.g.blk = (ppa32 & ppaf->blk_mask) >>
	536	ppaf->blk_offset;
	537	ppa64.g.pg = (ppa32 & ppaf->pg_mask) >>
	538	ppaf->pg_offset;
	539	ppa64.g.pl = (ppa32 & ppaf->pln_mask) >>
	540	ppaf->pln_offset;
	541	ppa64.g.sec = (ppa32 & ppaf->sec_mask) >>
	542	ppaf->sec_offset;
	543	} else {
	544	struct nvm_addrf *lbaf = addrf;
	545
	546	ppa64.m.grp = (ppa32 & lbaf->ch_mask) >>
	547	lbaf->ch_offset;
	548	ppa64.m.pu = (ppa32 & lbaf->lun_mask) >>
	549	lbaf->lun_offset;
	550	ppa64.m.chk = (ppa32 & lbaf->chk_mask) >>
	551	lbaf->chk_offset;
	552	ppa64.m.sec = (ppa32 & lbaf->sec_mask) >>
	553	lbaf->sec_offset;
	554	}
	555	}
	556
	557	return ppa64;
	558	}
	559
	560	static inline u32 nvm_ppa64_to_ppa32(struct nvm_dev *dev,
	561	void *addrf, struct ppa_addr ppa64)
	562	{
	563	u32 ppa32 = 0;
	564
	565	if (ppa64.ppa == ADDR_EMPTY) {
	566	ppa32 = ~0U;
	567	} else if (ppa64.c.is_cached) {
	568	ppa32 \|= ppa64.c.line;
	569	ppa32 \|= 1U << 31;
	570	} else {
	571	struct nvm_geo *geo = &dev->geo;
	572
	573	if (geo->version == NVM_OCSSD_SPEC_12) {
	574	struct nvm_addrf_12 *ppaf = addrf;
	575
	576	ppa32 \|= ppa64.g.ch << ppaf->ch_offset;
577	ppa32 \|= ppa64.g.lun << ppaf->lun_offset;
578	ppa32 \|= ppa64.g.blk << ppaf->blk_offset;
579	ppa32 \|= ppa64.g.pg << ppaf->pg_offset;
580	ppa32 \|= ppa64.g.pl << ppaf->pln_offset;
581	ppa32 \|= ppa64.g.sec << ppaf->sec_offset;
582	} else {
583	struct nvm_addrf *lbaf = addrf;
584
585	ppa32 \|= ppa64.m.grp << lbaf->ch_offset;
586	ppa32 \|= ppa64.m.pu << lbaf->lun_offset;
587	ppa32 \|= ppa64.m.chk << lbaf->chk_offset;
588	ppa32 \|= ppa64.m.sec << lbaf->sec_offset;
589	}
590	}
591
592	return ppa32;
593	}
594
bf82fa2f HH	595	static inline int nvm_next_ppa_in_chk(struct nvm_tgt_dev *dev,
	596	struct ppa_addr *ppa)
	597	{
	598	struct nvm_geo *geo = &dev->geo;
	599	int last = 0;
	600
	601	if (geo->version == NVM_OCSSD_SPEC_12) {
	602	int sec = ppa->g.sec;
	603
	604	sec++;
	605	if (sec == geo->ws_min) {
	606	int pg = ppa->g.pg;
	607
	608	sec = 0;
	609	pg++;
	610	if (pg == geo->num_pg) {
	611	int pl = ppa->g.pl;
	612
	613	pg = 0;
	614	pl++;
	615	if (pl == geo->num_pln)
	616	last = 1;
	617
	618	ppa->g.pl = pl;
	619	}
	620	ppa->g.pg = pg;
	621	}
	622	ppa->g.sec = sec;
	623	} else {
	624	ppa->m.sec++;
	625	if (ppa->m.sec == geo->clba)
	626	last = 1;
	627	}
	628
	629	return last;
	630	}
7f985f9a	631
cd9e9808	632	typedef sector_t (nvm_tgt_capacity_fn)(void *);
4af3f75d JG	633	typedef void (nvm_tgt_init_fn)(struct nvm_tgt_dev , struct gendisk *,
4af3f75d JG	634	int flags);
a7c9e910	635	typedef void (nvm_tgt_exit_fn)(void *, bool);
9a69b0ed JG	636	typedef int (nvm_tgt_sysfs_init_fn)(struct gendisk *);
9a69b0ed JG	637	typedef void (nvm_tgt_sysfs_exit_fn)(struct gendisk *);
cd9e9808	638
656e33ca MB	639	enum {
	640	NVM_TGT_F_DEV_L2P = 0,
	641	NVM_TGT_F_HOST_L2P = 1 << 0,
	642	};
	643
cd9e9808 MB	644	struct nvm_tgt_type {
	645	const char *name;
	646	unsigned int version[3];
656e33ca	647	int flags;
cd9e9808 MB	648
cd9e9808 MB	649	/* target entry points */
c62b37d9	650	const struct block_device_operations *bops;
cd9e9808	651	nvm_tgt_capacity_fn *capacity;
cd9e9808 MB	652
	653	/* module-specific init/teardown */
	654	nvm_tgt_init_fn *init;
	655	nvm_tgt_exit_fn *exit;
	656
9a69b0ed JG	657	/* sysfs */
	658	nvm_tgt_sysfs_init_fn *sysfs_init;
	659	nvm_tgt_sysfs_exit_fn *sysfs_exit;
	660
cd9e9808 MB	661	/* For internal use */
cd9e9808 MB	662	struct list_head list;
90014829	663	struct module *owner;
cd9e9808 MB	664	};
cd9e9808 MB	665
6063fe39 SL	666	extern int nvm_register_tgt_type(struct nvm_tgt_type *);
6063fe39 SL	667	extern void nvm_unregister_tgt_type(struct nvm_tgt_type *);
cd9e9808 MB	668
	669	extern void nvm_dev_dma_alloc(struct nvm_dev , gfp_t, dma_addr_t *);
	670	extern void nvm_dev_dma_free(struct nvm_dev , void , dma_addr_t);
	671
b0b4e09c MB	672	extern struct nvm_dev *nvm_alloc_dev(int);
	673	extern int nvm_register(struct nvm_dev *);
	674	extern void nvm_unregister(struct nvm_dev *);
cd9e9808	675
aff3fb18 MB	676	extern int nvm_get_chunk_meta(struct nvm_tgt_dev *, struct ppa_addr,
	677	int, struct nvm_chk_meta *);
	678	extern int nvm_set_chunk_meta(struct nvm_tgt_dev , struct ppa_addr ,
333ba053	679	int, int);
48e5da72 HH	680	extern int nvm_submit_io(struct nvm_tgt_dev , struct nvm_rq , void *);
48e5da72 HH	681	extern int nvm_submit_io_sync(struct nvm_tgt_dev , struct nvm_rq , void *);
06894efe	682	extern void nvm_end_io(struct nvm_rq *);
e3eb3799	683
cd9e9808 MB	684	#else /* CONFIG_NVM */
	685	struct nvm_dev_ops;
	686
b0b4e09c MB	687	static inline struct nvm_dev *nvm_alloc_dev(int node)
	688	{
	689	return ERR_PTR(-EINVAL);
	690	}
	691	static inline int nvm_register(struct nvm_dev *dev)
cd9e9808 MB	692	{
	693	return -EINVAL;
	694	}
b0b4e09c	695	static inline void nvm_unregister(struct nvm_dev *dev) {}
cd9e9808 MB	696	#endif /* CONFIG_NVM */
cd9e9808 MB	697	#endif /* LIGHTNVM.H */