4 #include <linux/blkdev.h>
5 #include <linux/types.h>
6 #include <uapi/linux/lightnvm.h>
18 #define NVM_BLK_BITS (16)
19 #define NVM_PG_BITS (16)
20 #define NVM_SEC_BITS (8)
21 #define NVM_PL_BITS (8)
22 #define NVM_LUN_BITS (8)
23 #define NVM_CH_BITS (7)
26 /* Generic structure for all addresses */
29 u64 blk : NVM_BLK_BITS;
31 u64 sec : NVM_SEC_BITS;
33 u64 lun : NVM_LUN_BITS;
51 typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
52 typedef int (nvm_id_fn)(struct nvm_dev *, struct nvm_id *);
53 typedef int (nvm_get_l2p_tbl_fn)(struct nvm_dev *, u64, u32,
54 nvm_l2p_update_fn *, void *);
55 typedef int (nvm_op_bb_tbl_fn)(struct nvm_dev *, struct ppa_addr, u8 *);
56 typedef int (nvm_op_set_bb_fn)(struct nvm_dev *, struct ppa_addr *, int, int);
57 typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
58 typedef int (nvm_erase_blk_fn)(struct nvm_dev *, struct nvm_rq *);
59 typedef void *(nvm_create_dma_pool_fn)(struct nvm_dev *, char *);
60 typedef void (nvm_destroy_dma_pool_fn)(void *);
61 typedef void *(nvm_dev_dma_alloc_fn)(struct nvm_dev *, void *, gfp_t,
63 typedef void (nvm_dev_dma_free_fn)(void *, void*, dma_addr_t);
67 nvm_get_l2p_tbl_fn *get_l2p_tbl;
68 nvm_op_bb_tbl_fn *get_bb_tbl;
69 nvm_op_set_bb_fn *set_bb_tbl;
71 nvm_submit_io_fn *submit_io;
72 nvm_erase_blk_fn *erase_block;
74 nvm_create_dma_pool_fn *create_dma_pool;
75 nvm_destroy_dma_pool_fn *destroy_dma_pool;
76 nvm_dev_dma_alloc_fn *dev_dma_alloc;
77 nvm_dev_dma_free_fn *dev_dma_free;
79 unsigned int max_phys_sect;
86 #include <linux/blkdev.h>
87 #include <linux/file.h>
88 #include <linux/dmapool.h>
89 #include <uapi/linux/lightnvm.h>
92 /* HW Responsibilities */
96 /* Physical Adressing Mode */
97 NVM_ADDRMODE_LINEAR = 0,
98 NVM_ADDRMODE_CHANNEL = 1,
100 /* Plane programming mode for LUN */
101 NVM_PLANE_SINGLE = 1,
102 NVM_PLANE_DOUBLE = 2,
106 NVM_RSP_SUCCESS = 0x0,
107 NVM_RSP_NOT_CHANGEABLE = 0x1,
108 NVM_RSP_ERR_FAILWRITE = 0x40ff,
109 NVM_RSP_ERR_EMPTYPAGE = 0x42ff,
110 NVM_RSP_ERR_FAILECC = 0x4281,
111 NVM_RSP_WARN_HIGHECC = 0x4700,
114 NVM_OP_HBREAD = 0x02,
115 NVM_OP_HBWRITE = 0x81,
116 NVM_OP_PWRITE = 0x91,
120 /* PPA Command Flags */
121 NVM_IO_SNGL_ACCESS = 0x0,
122 NVM_IO_DUAL_ACCESS = 0x1,
123 NVM_IO_QUAD_ACCESS = 0x2,
125 /* NAND Access Modes */
126 NVM_IO_SUSPEND = 0x80,
127 NVM_IO_SLC_MODE = 0x100,
128 NVM_IO_SCRAMBLE_DISABLE = 0x200,
131 NVM_BLK_T_FREE = 0x0,
133 NVM_BLK_T_GRWN_BAD = 0x2,
135 NVM_BLK_T_HOST = 0x8,
137 /* Memory capabilities */
138 NVM_ID_CAP_SLC = 0x1,
139 NVM_ID_CAP_CMD_SUSPEND = 0x2,
140 NVM_ID_CAP_SCRAMBLE = 0x4,
141 NVM_ID_CAP_ENCRYPT = 0x8,
144 NVM_ID_FMTYPE_SLC = 0,
145 NVM_ID_FMTYPE_MLC = 1,
147 /* Device capabilities */
148 NVM_ID_DCAP_BBLKMGMT = 0x1,
149 NVM_UD_DCAP_ECC = 0x2,
152 struct nvm_id_lp_mlc {
157 struct nvm_id_lp_tbl {
159 struct nvm_id_lp_mlc mlc;
162 struct nvm_id_group {
183 struct nvm_id_lp_tbl lptbl;
186 struct nvm_addr_format {
207 struct nvm_addr_format ppaf;
208 struct nvm_id_group groups[4];
212 struct list_head list;
213 struct list_head lun_list;
214 struct nvm_tgt_dev *dev;
215 struct nvm_tgt_type *type;
216 struct gendisk *disk;
219 struct nvm_tgt_instance {
220 struct nvm_tgt_type *tt;
223 #define ADDR_EMPTY (~0ULL)
225 #define NVM_VERSION_MAJOR 1
226 #define NVM_VERSION_MINOR 0
227 #define NVM_VERSION_PATCH 0
230 typedef void (nvm_end_io_fn)(struct nvm_rq *);
233 struct nvm_tgt_instance *ins;
239 struct ppa_addr ppa_addr;
240 dma_addr_t dma_ppa_list;
243 struct ppa_addr *ppa_list;
246 dma_addr_t dma_meta_list;
248 struct completion *wait;
249 nvm_end_io_fn *end_io;
255 u64 ppa_status; /* ppa media status */
259 static inline struct nvm_rq *nvm_rq_from_pdu(void *pdu)
261 return pdu - sizeof(struct nvm_rq);
264 static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
275 struct list_head list;
279 NVM_BLK_ST_FREE = 0x1, /* Free block */
280 NVM_BLK_ST_TGT = 0x2, /* Block in use by target */
281 NVM_BLK_ST_BAD = 0x8, /* Bad block */
284 /* system block cpu representation */
287 unsigned long erase_cnt;
288 unsigned int version;
289 char mmtype[NVM_MMTYPE_LEN];
290 struct ppa_addr fs_ppa;
293 /* Device generic information */
297 int luns_per_chnl; /* -1 if channels are not symmetric */
299 int sec_per_pg; /* only sectors for a single page */
303 int pfpg_size; /* size of buffer if all pages are to be read */
307 struct nvm_addr_format ppaf;
309 /* Calculated/Cached values. These do not reflect the actual usable
310 * blocks at run-time.
313 int plane_mode; /* drive device in single, double or quad mode */
315 int sec_per_pl; /* all sectors across planes */
321 /* Device information */
326 struct nvm_id identity;
327 struct request_queue *q;
329 struct nvmm_type *mt;
330 struct nvm_dev_ops *ops;
336 struct nvm_dev_ops *ops;
338 struct list_head devices;
341 struct nvmm_type *mt;
345 struct nvm_sb_info sb;
347 /* Device information */
350 /* lower page table */
354 unsigned long total_secs;
356 unsigned long *lun_map;
359 struct nvm_id identity;
362 struct request_queue *q;
363 char name[DISK_NAME_LEN];
370 static inline struct ppa_addr linear_to_generic_addr(struct nvm_geo *geo,
374 int secs, pgs, blks, luns;
375 sector_t ppa = r.ppa;
379 div_u64_rem(ppa, geo->sec_per_pg, &secs);
382 sector_div(ppa, geo->sec_per_pg);
383 div_u64_rem(ppa, geo->pgs_per_blk, &pgs);
386 sector_div(ppa, geo->pgs_per_blk);
387 div_u64_rem(ppa, geo->blks_per_lun, &blks);
390 sector_div(ppa, geo->blks_per_lun);
391 div_u64_rem(ppa, geo->luns_per_chnl, &luns);
394 sector_div(ppa, geo->luns_per_chnl);
400 static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
403 struct nvm_geo *geo = &dev->geo;
406 l.ppa = ((u64)r.g.blk) << geo->ppaf.blk_offset;
407 l.ppa |= ((u64)r.g.pg) << geo->ppaf.pg_offset;
408 l.ppa |= ((u64)r.g.sec) << geo->ppaf.sect_offset;
409 l.ppa |= ((u64)r.g.pl) << geo->ppaf.pln_offset;
410 l.ppa |= ((u64)r.g.lun) << geo->ppaf.lun_offset;
411 l.ppa |= ((u64)r.g.ch) << geo->ppaf.ch_offset;
416 static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
419 struct nvm_geo *geo = &dev->geo;
424 * (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc.
426 l.g.blk = (r.ppa >> geo->ppaf.blk_offset) &
427 (((1 << geo->ppaf.blk_len) - 1));
428 l.g.pg |= (r.ppa >> geo->ppaf.pg_offset) &
429 (((1 << geo->ppaf.pg_len) - 1));
430 l.g.sec |= (r.ppa >> geo->ppaf.sect_offset) &
431 (((1 << geo->ppaf.sect_len) - 1));
432 l.g.pl |= (r.ppa >> geo->ppaf.pln_offset) &
433 (((1 << geo->ppaf.pln_len) - 1));
434 l.g.lun |= (r.ppa >> geo->ppaf.lun_offset) &
435 (((1 << geo->ppaf.lun_len) - 1));
436 l.g.ch |= (r.ppa >> geo->ppaf.ch_offset) &
437 (((1 << geo->ppaf.ch_len) - 1));
442 static inline int ppa_empty(struct ppa_addr ppa_addr)
444 return (ppa_addr.ppa == ADDR_EMPTY);
447 static inline void ppa_set_empty(struct ppa_addr *ppa_addr)
449 ppa_addr->ppa = ADDR_EMPTY;
452 static inline int ppa_cmp_blk(struct ppa_addr ppa1, struct ppa_addr ppa2)
454 if (ppa_empty(ppa1) || ppa_empty(ppa2))
457 return ((ppa1.g.ch == ppa2.g.ch) && (ppa1.g.lun == ppa2.g.lun) &&
458 (ppa1.g.blk == ppa2.g.blk));
461 static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
463 return dev->lptbl[slc_pg];
466 typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
467 typedef sector_t (nvm_tgt_capacity_fn)(void *);
468 typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *,
469 struct list_head *lun_list);
470 typedef void (nvm_tgt_exit_fn)(void *);
472 struct nvm_tgt_type {
474 unsigned int version[3];
476 /* target entry points */
477 nvm_tgt_make_rq_fn *make_rq;
478 nvm_tgt_capacity_fn *capacity;
479 nvm_end_io_fn *end_io;
481 /* module-specific init/teardown */
482 nvm_tgt_init_fn *init;
483 nvm_tgt_exit_fn *exit;
485 /* For internal use */
486 struct list_head list;
489 extern struct nvm_tgt_type *nvm_find_target_type(const char *, int);
491 extern int nvm_register_tgt_type(struct nvm_tgt_type *);
492 extern void nvm_unregister_tgt_type(struct nvm_tgt_type *);
494 extern void *nvm_dev_dma_alloc(struct nvm_dev *, gfp_t, dma_addr_t *);
495 extern void nvm_dev_dma_free(struct nvm_dev *, void *, dma_addr_t);
497 typedef int (nvmm_register_fn)(struct nvm_dev *);
498 typedef void (nvmm_unregister_fn)(struct nvm_dev *);
500 typedef int (nvmm_create_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_create *);
501 typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
502 typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
503 typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct ppa_addr *, int);
504 typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t);
505 typedef void (nvmm_put_area_fn)(struct nvm_dev *, sector_t);
509 unsigned int version[3];
511 nvmm_register_fn *register_mgr;
512 nvmm_unregister_fn *unregister_mgr;
514 nvmm_create_tgt_fn *create_tgt;
515 nvmm_remove_tgt_fn *remove_tgt;
517 nvmm_submit_io_fn *submit_io;
518 nvmm_erase_blk_fn *erase_blk;
520 nvmm_get_area_fn *get_area;
521 nvmm_put_area_fn *put_area;
523 struct list_head list;
526 extern int nvm_register_mgr(struct nvmm_type *);
527 extern void nvm_unregister_mgr(struct nvmm_type *);
529 extern struct nvm_dev *nvm_alloc_dev(int);
530 extern int nvm_register(struct nvm_dev *);
531 extern void nvm_unregister(struct nvm_dev *);
533 extern int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas,
534 int nr_ppas, int type);
536 extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *);
537 extern void nvm_generic_to_addr_mode(struct nvm_dev *, struct nvm_rq *);
538 extern void nvm_addr_to_generic_mode(struct nvm_dev *, struct nvm_rq *);
539 extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
540 const struct ppa_addr *, int, int);
541 extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
542 extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int, int);
543 extern int nvm_erase_blk(struct nvm_dev *, struct ppa_addr *, int);
544 extern void nvm_end_io(struct nvm_rq *, int);
545 extern int nvm_submit_ppa(struct nvm_dev *, struct ppa_addr *, int, int, int,
547 extern int nvm_submit_ppa_list(struct nvm_dev *, struct ppa_addr *, int, int,
549 extern int nvm_bb_tbl_fold(struct nvm_dev *, u8 *, int);
550 extern int nvm_get_bb_tbl(struct nvm_dev *, struct ppa_addr, u8 *);
553 #define NVM_SYSBLK_MAGIC 0x4E564D53 /* "NVMS" */
555 /* system block on disk representation */
556 struct nvm_system_block {
557 __be32 magic; /* magic signature */
558 __be32 seqnr; /* sequence number */
559 __be32 erase_cnt; /* erase count */
560 __be16 version; /* version number */
561 u8 mmtype[NVM_MMTYPE_LEN]; /* media manager name */
562 __be64 fs_ppa; /* PPA for media manager
566 extern int nvm_get_sysblock(struct nvm_dev *, struct nvm_sb_info *);
567 extern int nvm_update_sysblock(struct nvm_dev *, struct nvm_sb_info *);
568 extern int nvm_init_sysblock(struct nvm_dev *, struct nvm_sb_info *);
570 extern int nvm_dev_factory(struct nvm_dev *, int flags);
572 #define nvm_for_each_lun_ppa(geo, ppa, chid, lunid) \
573 for ((chid) = 0, (ppa).ppa = 0; (chid) < (geo)->nr_chnls; \
574 (chid)++, (ppa).g.ch = (chid)) \
575 for ((lunid) = 0; (lunid) < (geo)->luns_per_chnl; \
576 (lunid)++, (ppa).g.lun = (lunid))
578 #else /* CONFIG_NVM */
581 static inline struct nvm_dev *nvm_alloc_dev(int node)
583 return ERR_PTR(-EINVAL);
585 static inline int nvm_register(struct nvm_dev *dev)
589 static inline void nvm_unregister(struct nvm_dev *dev) {}
590 #endif /* CONFIG_NVM */
591 #endif /* LIGHTNVM.H */