[linux-2.6-block.git] / include / linux / lightnvm.h

#ifndef NVM_H
#define NVM_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,
};

#ifdef CONFIG_NVM

#include <linux/blkdev.h>
#include <linux/types.h>
#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	= 0,
	NVM_PLANE_DOUBLE	= 1,
	NVM_PLANE_QUAD		= 2,

	/* Status codes */
	NVM_RSP_SUCCESS		= 0x0,
	NVM_RSP_NOT_CHANGEABLE	= 0x1,
	NVM_RSP_ERR_FAILWRITE	= 0x40ff,
	NVM_RSP_ERR_EMPTYPAGE	= 0x42ff,

	/* Device opcodes */
	NVM_OP_HBREAD		= 0x02,
	NVM_OP_HBWRITE		= 0x81,
	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_DISABLE	= 0x200,

	/* Block Types */
	NVM_BLK_T_FREE		= 0x0,
	NVM_BLK_T_BAD		= 0x1,
	NVM_BLK_T_DEV		= 0x2,
	NVM_BLK_T_HOST		= 0x4,
};

struct nvm_id_group {
	u8	mtype;
	u8	fmtype;
	u8	num_ch;
	u8	num_lun;
	u8	num_pln;
	u16	num_blk;
	u16	num_pg;
	u16	fpg_sz;
	u16	csecs;
	u16	sos;
	u32	trdt;
	u32	trdm;
	u32	tprt;
	u32	tprm;
	u32	tbet;
	u32	tbem;
	u32	mpos;
	u32	mccap;
	u16	cpar;
};

struct nvm_addr_format {
	u8	ch_offset;
	u8	ch_len;
	u8	lun_offset;
	u8	lun_len;
	u8	pln_offset;
	u8	pln_len;
	u8	blk_offset;
	u8	blk_len;
	u8	pg_offset;
	u8	pg_len;
	u8	sect_offset;
	u8	sect_len;
};

struct nvm_id {
	u8	ver_id;
	u8	vmnt;
	u8	cgrps;
	u32	cap;
	u32	dom;
	struct nvm_addr_format ppaf;
	struct nvm_id_group groups[4];
} __packed;

struct nvm_target {
	struct list_head list;
	struct nvm_tgt_type *type;
	struct gendisk *disk;
};

struct nvm_tgt_instance {
	struct nvm_tgt_type *tt;
};

#define ADDR_EMPTY (~0ULL)

#define NVM_VERSION_MAJOR 1
#define NVM_VERSION_MINOR 0
#define NVM_VERSION_PATCH 0

#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  (8)

struct ppa_addr {
	/* Generic structure for all addresses */
	union {
		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;
		} g;

		u64 ppa;
	};
};

struct nvm_rq {
	struct nvm_tgt_instance *ins;
	struct nvm_dev *dev;

	struct bio *bio;

	union {
		struct ppa_addr ppa_addr;
		dma_addr_t dma_ppa_list;
	};

	struct ppa_addr *ppa_list;

	void *metadata;
	dma_addr_t dma_metadata;

	uint8_t opcode;
	uint16_t nr_pages;
	uint16_t flags;
};

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;
}

struct nvm_block;

typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
typedef int (nvm_bb_update_fn)(struct ppa_addr, int, u8 *, void *);
typedef int (nvm_id_fn)(struct nvm_dev *, struct nvm_id *);
typedef int (nvm_get_l2p_tbl_fn)(struct nvm_dev *, u64, u32,
				nvm_l2p_update_fn *, void *);
typedef int (nvm_op_bb_tbl_fn)(struct nvm_dev *, struct ppa_addr, int,
				nvm_bb_update_fn *, void *);
typedef int (nvm_op_set_bb_fn)(struct nvm_dev *, struct nvm_rq *, int);
typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
typedef int (nvm_erase_blk_fn)(struct nvm_dev *, struct nvm_rq *);
typedef void *(nvm_create_dma_pool_fn)(struct nvm_dev *, char *);
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_get_l2p_tbl_fn	*get_l2p_tbl;
	nvm_op_bb_tbl_fn	*get_bb_tbl;
	nvm_op_set_bb_fn	*set_bb_tbl;

	nvm_submit_io_fn	*submit_io;
	nvm_erase_blk_fn	*erase_block;

	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;

	unsigned int		max_phys_sect;
};

struct nvm_lun {
	int id;

	int lun_id;
	int chnl_id;

	unsigned int nr_inuse_blocks;	/* Number of used blocks */
	unsigned int nr_free_blocks;	/* Number of unused blocks */
	unsigned int nr_bad_blocks;	/* Number of bad blocks */
	struct nvm_block *blocks;

	spinlock_t lock;
};

struct nvm_block {
	struct list_head list;
	struct nvm_lun *lun;
	unsigned long id;

	void *priv;
	int type;
};

struct nvm_dev {
	struct nvm_dev_ops *ops;

	struct list_head devices;
	struct list_head online_targets;

	/* Media manager */
	struct nvmm_type *mt;
	void *mp;

	/* Device information */
	int nr_chnls;
	int nr_planes;
	int luns_per_chnl;
	int sec_per_pg; /* only sectors for a single page */
	int pgs_per_blk;
	int blks_per_lun;
	int sec_size;
	int oob_size;
	struct nvm_addr_format ppaf;

	/* Calculated/Cached values. These do not reflect the actual usable
	 * blocks at run-time.
	 */
	int max_rq_size;
	int plane_mode; /* drive device in single, double or quad mode */

	int sec_per_pl; /* all sectors across planes */
	int sec_per_blk;
	int sec_per_lun;

	unsigned long total_pages;
	unsigned long total_blocks;
	int nr_luns;
	unsigned max_pages_per_blk;

	void *ppalist_pool;

	struct nvm_id identity;

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

static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
						struct ppa_addr r)
{
	struct ppa_addr l;

	l.ppa = ((u64)r.g.blk) << dev->ppaf.blk_offset;
	l.ppa |= ((u64)r.g.pg) << dev->ppaf.pg_offset;
	l.ppa |= ((u64)r.g.sec) << dev->ppaf.sect_offset;
	l.ppa |= ((u64)r.g.pl) << dev->ppaf.pln_offset;
	l.ppa |= ((u64)r.g.lun) << dev->ppaf.lun_offset;
	l.ppa |= ((u64)r.g.ch) << dev->ppaf.ch_offset;

	return l;
}

static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
						struct ppa_addr r)
{
	struct ppa_addr l;

	/*
	 * (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc.
	 */
	l.g.blk = (r.ppa >> dev->ppaf.blk_offset) &
					(((1 << dev->ppaf.blk_len) - 1));
	l.g.pg |= (r.ppa >> dev->ppaf.pg_offset) &
					(((1 << dev->ppaf.pg_len) - 1));
	l.g.sec |= (r.ppa >> dev->ppaf.sect_offset) &
					(((1 << dev->ppaf.sect_len) - 1));
	l.g.pl |= (r.ppa >> dev->ppaf.pln_offset) &
					(((1 << dev->ppaf.pln_len) - 1));
	l.g.lun |= (r.ppa >> dev->ppaf.lun_offset) &
					(((1 << dev->ppaf.lun_len) - 1));
	l.g.ch |= (r.ppa >> dev->ppaf.ch_offset) &
					(((1 << dev->ppaf.ch_len) - 1));

	return l;
}

static inline int ppa_empty(struct ppa_addr ppa_addr)
{
	return (ppa_addr.ppa == ADDR_EMPTY);
}

static inline void ppa_set_empty(struct ppa_addr *ppa_addr)
{
	ppa_addr->ppa = ADDR_EMPTY;
}

static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev,
							struct nvm_block *blk)
{
	struct ppa_addr ppa;
	struct nvm_lun *lun = blk->lun;

	ppa.ppa = 0;
	ppa.g.blk = blk->id % dev->blks_per_lun;
	ppa.g.lun = lun->lun_id;
	ppa.g.ch = lun->chnl_id;

	return ppa;
}

typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
typedef sector_t (nvm_tgt_capacity_fn)(void *);
typedef int (nvm_tgt_end_io_fn)(struct nvm_rq *, int);
typedef void *(nvm_tgt_init_fn)(struct nvm_dev *, struct gendisk *, int, int);
typedef void (nvm_tgt_exit_fn)(void *);

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

	/* target entry points */
	nvm_tgt_make_rq_fn *make_rq;
	nvm_tgt_capacity_fn *capacity;
	nvm_tgt_end_io_fn *end_io;

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

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

extern int nvm_register_target(struct nvm_tgt_type *);
extern void nvm_unregister_target(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);

typedef int (nvmm_register_fn)(struct nvm_dev *);
typedef void (nvmm_unregister_fn)(struct nvm_dev *);
typedef struct nvm_block *(nvmm_get_blk_fn)(struct nvm_dev *,
					      struct nvm_lun *, unsigned long);
typedef void (nvmm_put_blk_fn)(struct nvm_dev *, struct nvm_block *);
typedef int (nvmm_open_blk_fn)(struct nvm_dev *, struct nvm_block *);
typedef int (nvmm_close_blk_fn)(struct nvm_dev *, struct nvm_block *);
typedef void (nvmm_flush_blk_fn)(struct nvm_dev *, struct nvm_block *);
typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
typedef int (nvmm_end_io_fn)(struct nvm_rq *, int);
typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *,
								unsigned long);
typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);

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

	nvmm_register_fn *register_mgr;
	nvmm_unregister_fn *unregister_mgr;

	/* Block administration callbacks */
	nvmm_get_blk_fn *get_blk;
	nvmm_put_blk_fn *put_blk;
	nvmm_open_blk_fn *open_blk;
	nvmm_close_blk_fn *close_blk;
	nvmm_flush_blk_fn *flush_blk;

	nvmm_submit_io_fn *submit_io;
	nvmm_end_io_fn *end_io;
	nvmm_erase_blk_fn *erase_blk;

	/* Configuration management */
	nvmm_get_lun_fn *get_lun;

	/* Statistics */
	nvmm_lun_info_print_fn *lun_info_print;
	struct list_head list;
};

extern int nvm_register_mgr(struct nvmm_type *);
extern void nvm_unregister_mgr(struct nvmm_type *);

extern struct nvm_block *nvm_get_blk(struct nvm_dev *, struct nvm_lun *,
								unsigned long);
extern void nvm_put_blk(struct nvm_dev *, struct nvm_block *);

extern int nvm_register(struct request_queue *, char *,
						struct nvm_dev_ops *);
extern void nvm_unregister(char *);

extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *);
extern void nvm_generic_to_addr_mode(struct nvm_dev *, struct nvm_rq *);
extern void nvm_addr_to_generic_mode(struct nvm_dev *, struct nvm_rq *);
extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
							struct ppa_addr *, int);
extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr);
extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);
#else /* CONFIG_NVM */
struct nvm_dev_ops;

static inline int nvm_register(struct request_queue *q, char *disk_name,
							struct nvm_dev_ops *ops)
{
	return -EINVAL;
}
static inline void nvm_unregister(char *disk_name) {}
#endif /* CONFIG_NVM */
#endif /* LIGHTNVM.H */
Commit	Line	Data
cd9e9808 MB	1	#ifndef NVM_H
	2	#define NVM_H
	3
	4	enum {
	5	NVM_IO_OK = 0,
	6	NVM_IO_REQUEUE = 1,
	7	NVM_IO_DONE = 2,
	8	NVM_IO_ERR = 3,
	9
	10	NVM_IOTYPE_NONE = 0,
	11	NVM_IOTYPE_GC = 1,
	12	};
	13
	14	#ifdef CONFIG_NVM
	15
	16	#include <linux/blkdev.h>
	17	#include <linux/types.h>
	18	#include <linux/file.h>
	19	#include <linux/dmapool.h>
	20
	21	enum {
	22	/* HW Responsibilities */
	23	NVM_RSP_L2P = 1 << 0,
	24	NVM_RSP_ECC = 1 << 1,
	25
	26	/* Physical Adressing Mode */
	27	NVM_ADDRMODE_LINEAR = 0,
	28	NVM_ADDRMODE_CHANNEL = 1,
	29
	30	/* Plane programming mode for LUN */
	31	NVM_PLANE_SINGLE = 0,
	32	NVM_PLANE_DOUBLE = 1,
	33	NVM_PLANE_QUAD = 2,
	34
	35	/* Status codes */
	36	NVM_RSP_SUCCESS = 0x0,
	37	NVM_RSP_NOT_CHANGEABLE = 0x1,
	38	NVM_RSP_ERR_FAILWRITE = 0x40ff,
	39	NVM_RSP_ERR_EMPTYPAGE = 0x42ff,
	40
	41	/* Device opcodes */
	42	NVM_OP_HBREAD = 0x02,
	43	NVM_OP_HBWRITE = 0x81,
	44	NVM_OP_PWRITE = 0x91,
	45	NVM_OP_PREAD = 0x92,
	46	NVM_OP_ERASE = 0x90,
	47
	48	/* PPA Command Flags */
	49	NVM_IO_SNGL_ACCESS = 0x0,
	50	NVM_IO_DUAL_ACCESS = 0x1,
	51	NVM_IO_QUAD_ACCESS = 0x2,
	52
57b4bd06	53	/* NAND Access Modes */
cd9e9808 MB	54	NVM_IO_SUSPEND = 0x80,
	55	NVM_IO_SLC_MODE = 0x100,
	56	NVM_IO_SCRAMBLE_DISABLE = 0x200,
57b4bd06 MB	57
	58	/* Block Types */
	59	NVM_BLK_T_FREE = 0x0,
	60	NVM_BLK_T_BAD = 0x1,
	61	NVM_BLK_T_DEV = 0x2,
	62	NVM_BLK_T_HOST = 0x4,
cd9e9808 MB	63	};
	64
	65	struct nvm_id_group {
	66	u8 mtype;
	67	u8 fmtype;
cd9e9808 MB	68	u8 num_ch;
	69	u8 num_lun;
	70	u8 num_pln;
	71	u16 num_blk;
	72	u16 num_pg;
	73	u16 fpg_sz;
	74	u16 csecs;
	75	u16 sos;
	76	u32 trdt;
	77	u32 trdm;
	78	u32 tprt;
	79	u32 tprm;
	80	u32 tbet;
	81	u32 tbem;
	82	u32 mpos;
12be5edf	83	u32 mccap;
cd9e9808	84	u16 cpar;
73387e7b	85	};
cd9e9808 MB	86
	87	struct nvm_addr_format {
	88	u8 ch_offset;
	89	u8 ch_len;
	90	u8 lun_offset;
	91	u8 lun_len;
	92	u8 pln_offset;
	93	u8 pln_len;
	94	u8 blk_offset;
	95	u8 blk_len;
	96	u8 pg_offset;
	97	u8 pg_len;
	98	u8 sect_offset;
	99	u8 sect_len;
cd9e9808 MB	100	};
	101
	102	struct nvm_id {
	103	u8 ver_id;
	104	u8 vmnt;
	105	u8 cgrps;
cd9e9808 MB	106	u32 cap;
	107	u32 dom;
	108	struct nvm_addr_format ppaf;
cd9e9808 MB	109	struct nvm_id_group groups[4];
	110	} __packed;
	111
	112	struct nvm_target {
	113	struct list_head list;
	114	struct nvm_tgt_type *type;
	115	struct gendisk *disk;
	116	};
	117
	118	struct nvm_tgt_instance {
	119	struct nvm_tgt_type *tt;
	120	};
	121
	122	#define ADDR_EMPTY (~0ULL)
	123
	124	#define NVM_VERSION_MAJOR 1
	125	#define NVM_VERSION_MINOR 0
	126	#define NVM_VERSION_PATCH 0
	127
cd9e9808	128	#define NVM_BLK_BITS (16)
7386af27 MB	129	#define NVM_PG_BITS (16)
	130	#define NVM_SEC_BITS (8)
	131	#define NVM_PL_BITS (8)
	132	#define NVM_LUN_BITS (8)
cd9e9808 MB	133	#define NVM_CH_BITS (8)
	134
	135	struct ppa_addr {
7386af27	136	/* Generic structure for all addresses */
cd9e9808	137	union {
cd9e9808	138	struct {
7386af27 MB	139	u64 blk : NVM_BLK_BITS;
7386af27 MB	140	u64 pg : NVM_PG_BITS;
b7ceb7d5 MB	141	u64 sec : NVM_SEC_BITS;
b7ceb7d5 MB	142	u64 pl : NVM_PL_BITS;
b7ceb7d5 MB	143	u64 lun : NVM_LUN_BITS;
b7ceb7d5 MB	144	u64 ch : NVM_CH_BITS;
cd9e9808 MB	145	} g;
cd9e9808 MB	146
b7ceb7d5	147	u64 ppa;
cd9e9808	148	};
7386af27	149	};
cd9e9808 MB	150
	151	struct nvm_rq {
	152	struct nvm_tgt_instance *ins;
	153	struct nvm_dev *dev;
	154
	155	struct bio *bio;
	156
	157	union {
	158	struct ppa_addr ppa_addr;
	159	dma_addr_t dma_ppa_list;
	160	};
	161
	162	struct ppa_addr *ppa_list;
	163
	164	void *metadata;
	165	dma_addr_t dma_metadata;
	166
	167	uint8_t opcode;
	168	uint16_t nr_pages;
	169	uint16_t flags;
	170	};
	171
	172	static inline struct nvm_rq nvm_rq_from_pdu(void pdu)
	173	{
	174	return pdu - sizeof(struct nvm_rq);
	175	}
	176
	177	static inline void nvm_rq_to_pdu(struct nvm_rq rqdata)
	178	{
	179	return rqdata + 1;
	180	}
	181
	182	struct nvm_block;
	183
	184	typedef int (nvm_l2p_update_fn)(u64, u32, __le64 , void );
11450469	185	typedef int (nvm_bb_update_fn)(struct ppa_addr, int, u8 , void );
16f26c3a MB	186	typedef int (nvm_id_fn)(struct nvm_dev , struct nvm_id );
16f26c3a MB	187	typedef int (nvm_get_l2p_tbl_fn)(struct nvm_dev *, u64, u32,
cd9e9808	188	nvm_l2p_update_fn , void );
08236c6b	189	typedef int (nvm_op_bb_tbl_fn)(struct nvm_dev *, struct ppa_addr, int,
cd9e9808	190	nvm_bb_update_fn , void );
16f26c3a MB	191	typedef int (nvm_op_set_bb_fn)(struct nvm_dev , struct nvm_rq , int);
	192	typedef int (nvm_submit_io_fn)(struct nvm_dev , struct nvm_rq );
	193	typedef int (nvm_erase_blk_fn)(struct nvm_dev , struct nvm_rq );
	194	typedef void (nvm_create_dma_pool_fn)(struct nvm_dev , char *);
cd9e9808	195	typedef void (nvm_destroy_dma_pool_fn)(void *);
16f26c3a	196	typedef void (nvm_dev_dma_alloc_fn)(struct nvm_dev , void *, gfp_t,
cd9e9808 MB	197	dma_addr_t *);
	198	typedef void (nvm_dev_dma_free_fn)(void , void, dma_addr_t);
	199
	200	struct nvm_dev_ops {
	201	nvm_id_fn *identity;
	202	nvm_get_l2p_tbl_fn *get_l2p_tbl;
	203	nvm_op_bb_tbl_fn *get_bb_tbl;
11450469	204	nvm_op_set_bb_fn *set_bb_tbl;
cd9e9808 MB	205
	206	nvm_submit_io_fn *submit_io;
	207	nvm_erase_blk_fn *erase_block;
	208
	209	nvm_create_dma_pool_fn *create_dma_pool;
	210	nvm_destroy_dma_pool_fn *destroy_dma_pool;
	211	nvm_dev_dma_alloc_fn *dev_dma_alloc;
	212	nvm_dev_dma_free_fn *dev_dma_free;
	213
aedf17f4	214	unsigned int max_phys_sect;
cd9e9808 MB	215	};
	216
	217	struct nvm_lun {
	218	int id;
	219
	220	int lun_id;
	221	int chnl_id;
	222
0b59733b	223	unsigned int nr_inuse_blocks; /* Number of used blocks */
cd9e9808	224	unsigned int nr_free_blocks; /* Number of unused blocks */
0b59733b	225	unsigned int nr_bad_blocks; /* Number of bad blocks */
cd9e9808 MB	226	struct nvm_block *blocks;
	227
	228	spinlock_t lock;
	229	};
	230
	231	struct nvm_block {
	232	struct list_head list;
	233	struct nvm_lun *lun;
	234	unsigned long id;
	235
	236	void *priv;
	237	int type;
	238	};
	239
	240	struct nvm_dev {
	241	struct nvm_dev_ops *ops;
	242
	243	struct list_head devices;
	244	struct list_head online_targets;
	245
	246	/* Media manager */
	247	struct nvmm_type *mt;
	248	void *mp;
	249
	250	/* Device information */
	251	int nr_chnls;
	252	int nr_planes;
	253	int luns_per_chnl;
	254	int sec_per_pg; /* only sectors for a single page */
	255	int pgs_per_blk;
	256	int blks_per_lun;
	257	int sec_size;
	258	int oob_size;
7386af27	259	struct nvm_addr_format ppaf;
cd9e9808 MB	260
	261	/* Calculated/Cached values. These do not reflect the actual usable
	262	* blocks at run-time.
	263	*/
	264	int max_rq_size;
	265	int plane_mode; /* drive device in single, double or quad mode */
	266
	267	int sec_per_pl; /* all sectors across planes */
	268	int sec_per_blk;
	269	int sec_per_lun;
	270
	271	unsigned long total_pages;
	272	unsigned long total_blocks;
	273	int nr_luns;
	274	unsigned max_pages_per_blk;
	275
	276	void *ppalist_pool;
	277
	278	struct nvm_id identity;
	279
	280	/* Backend device */
	281	struct request_queue *q;
	282	char name[DISK_NAME_LEN];
	283	};
	284
7386af27 MB	285	static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
7386af27 MB	286	struct ppa_addr r)
cd9e9808 MB	287	{
	288	struct ppa_addr l;
	289
7386af27 MB	290	l.ppa = ((u64)r.g.blk) << dev->ppaf.blk_offset;
	291	l.ppa \|= ((u64)r.g.pg) << dev->ppaf.pg_offset;
	292	l.ppa \|= ((u64)r.g.sec) << dev->ppaf.sect_offset;
	293	l.ppa \|= ((u64)r.g.pl) << dev->ppaf.pln_offset;
	294	l.ppa \|= ((u64)r.g.lun) << dev->ppaf.lun_offset;
	295	l.ppa \|= ((u64)r.g.ch) << dev->ppaf.ch_offset;
cd9e9808 MB	296
	297	return l;
	298	}
	299
7386af27 MB	300	static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
7386af27 MB	301	struct ppa_addr r)
cd9e9808 MB	302	{
	303	struct ppa_addr l;
	304
7386af27 MB	305	/*
	306	* (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc.
	307	*/
	308	l.g.blk = (r.ppa >> dev->ppaf.blk_offset) &
	309	(((1 << dev->ppaf.blk_len) - 1));
	310	l.g.pg \|= (r.ppa >> dev->ppaf.pg_offset) &
	311	(((1 << dev->ppaf.pg_len) - 1));
	312	l.g.sec \|= (r.ppa >> dev->ppaf.sect_offset) &
	313	(((1 << dev->ppaf.sect_len) - 1));
	314	l.g.pl \|= (r.ppa >> dev->ppaf.pln_offset) &
	315	(((1 << dev->ppaf.pln_len) - 1));
	316	l.g.lun \|= (r.ppa >> dev->ppaf.lun_offset) &
	317	(((1 << dev->ppaf.lun_len) - 1));
	318	l.g.ch \|= (r.ppa >> dev->ppaf.ch_offset) &
	319	(((1 << dev->ppaf.ch_len) - 1));
cd9e9808 MB	320
	321	return l;
	322	}
	323
cd9e9808 MB	324	static inline int ppa_empty(struct ppa_addr ppa_addr)
	325	{
	326	return (ppa_addr.ppa == ADDR_EMPTY);
	327	}
	328
	329	static inline void ppa_set_empty(struct ppa_addr *ppa_addr)
	330	{
	331	ppa_addr->ppa = ADDR_EMPTY;
	332	}
	333
	334	static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev,
	335	struct nvm_block *blk)
	336	{
	337	struct ppa_addr ppa;
	338	struct nvm_lun *lun = blk->lun;
	339
	340	ppa.ppa = 0;
	341	ppa.g.blk = blk->id % dev->blks_per_lun;
	342	ppa.g.lun = lun->lun_id;
	343	ppa.g.ch = lun->chnl_id;
	344
	345	return ppa;
	346	}
	347
dece1635	348	typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue , struct bio );
cd9e9808 MB	349	typedef sector_t (nvm_tgt_capacity_fn)(void *);
	350	typedef int (nvm_tgt_end_io_fn)(struct nvm_rq *, int);
	351	typedef void (nvm_tgt_init_fn)(struct nvm_dev , struct gendisk *, int, int);
	352	typedef void (nvm_tgt_exit_fn)(void *);
	353
	354	struct nvm_tgt_type {
	355	const char *name;
	356	unsigned int version[3];
	357
	358	/* target entry points */
	359	nvm_tgt_make_rq_fn *make_rq;
	360	nvm_tgt_capacity_fn *capacity;
	361	nvm_tgt_end_io_fn *end_io;
	362
	363	/* module-specific init/teardown */
	364	nvm_tgt_init_fn *init;
	365	nvm_tgt_exit_fn *exit;
	366
	367	/* For internal use */
	368	struct list_head list;
	369	};
	370
	371	extern int nvm_register_target(struct nvm_tgt_type *);
	372	extern void nvm_unregister_target(struct nvm_tgt_type *);
	373
	374	extern void nvm_dev_dma_alloc(struct nvm_dev , gfp_t, dma_addr_t *);
	375	extern void nvm_dev_dma_free(struct nvm_dev , void , dma_addr_t);
	376
	377	typedef int (nvmm_register_fn)(struct nvm_dev *);
	378	typedef void (nvmm_unregister_fn)(struct nvm_dev *);
	379	typedef struct nvm_block (nvmm_get_blk_fn)(struct nvm_dev ,
	380	struct nvm_lun *, unsigned long);
	381	typedef void (nvmm_put_blk_fn)(struct nvm_dev , struct nvm_block );
	382	typedef int (nvmm_open_blk_fn)(struct nvm_dev , struct nvm_block );
	383	typedef int (nvmm_close_blk_fn)(struct nvm_dev , struct nvm_block );
	384	typedef void (nvmm_flush_blk_fn)(struct nvm_dev , struct nvm_block );
	385	typedef int (nvmm_submit_io_fn)(struct nvm_dev , struct nvm_rq );
	386	typedef int (nvmm_end_io_fn)(struct nvm_rq *, int);
	387	typedef int (nvmm_erase_blk_fn)(struct nvm_dev , struct nvm_block ,
	388	unsigned long);
	389	typedef struct nvm_lun (nvmm_get_lun_fn)(struct nvm_dev , int);
2fde0e48	390	typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);
cd9e9808 MB	391
	392	struct nvmm_type {
	393	const char *name;
	394	unsigned int version[3];
	395
	396	nvmm_register_fn *register_mgr;
	397	nvmm_unregister_fn *unregister_mgr;
	398
	399	/* Block administration callbacks */
	400	nvmm_get_blk_fn *get_blk;
	401	nvmm_put_blk_fn *put_blk;
	402	nvmm_open_blk_fn *open_blk;
	403	nvmm_close_blk_fn *close_blk;
	404	nvmm_flush_blk_fn *flush_blk;
	405
	406	nvmm_submit_io_fn *submit_io;
	407	nvmm_end_io_fn *end_io;
	408	nvmm_erase_blk_fn *erase_blk;
	409
	410	/* Configuration management */
	411	nvmm_get_lun_fn *get_lun;
	412
	413	/* Statistics */
2fde0e48	414	nvmm_lun_info_print_fn *lun_info_print;
cd9e9808 MB	415	struct list_head list;
	416	};
	417
	418	extern int nvm_register_mgr(struct nvmm_type *);
	419	extern void nvm_unregister_mgr(struct nvmm_type *);
	420
	421	extern struct nvm_block nvm_get_blk(struct nvm_dev , struct nvm_lun *,
	422	unsigned long);
	423	extern void nvm_put_blk(struct nvm_dev , struct nvm_block );
	424
	425	extern int nvm_register(struct request_queue , char ,
	426	struct nvm_dev_ops *);
	427	extern void nvm_unregister(char *);
	428
	429	extern int nvm_submit_io(struct nvm_dev , struct nvm_rq );
069368e9 MB	430	extern void nvm_generic_to_addr_mode(struct nvm_dev , struct nvm_rq );
069368e9 MB	431	extern void nvm_addr_to_generic_mode(struct nvm_dev , struct nvm_rq );
abd805ec MB	432	extern int nvm_set_rqd_ppalist(struct nvm_dev , struct nvm_rq ,
	433	struct ppa_addr *, int);
	434	extern void nvm_free_rqd_ppalist(struct nvm_dev , struct nvm_rq );
069368e9	435	extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr);
cd9e9808 MB	436	extern int nvm_erase_blk(struct nvm_dev , struct nvm_block );
	437	#else /* CONFIG_NVM */
	438	struct nvm_dev_ops;
	439
	440	static inline int nvm_register(struct request_queue q, char disk_name,
	441	struct nvm_dev_ops *ops)
	442	{
	443	return -EINVAL;
	444	}
	445	static inline void nvm_unregister(char *disk_name) {}
	446	#endif /* CONFIG_NVM */
	447	#endif /* LIGHTNVM.H */