Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 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 | |
| 53 | NVM_IO_SUSPEND = 0x80, |
| 54 | NVM_IO_SLC_MODE = 0x100, |
| 55 | NVM_IO_SCRAMBLE_DISABLE = 0x200, |
| 56 | }; |
| 57 | |
| 58 | struct nvm_id_group { |
| 59 | u8 mtype; |
| 60 | u8 fmtype; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 61 | u8 num_ch; |
| 62 | u8 num_lun; |
| 63 | u8 num_pln; |
| 64 | u16 num_blk; |
| 65 | u16 num_pg; |
| 66 | u16 fpg_sz; |
| 67 | u16 csecs; |
| 68 | u16 sos; |
| 69 | u32 trdt; |
| 70 | u32 trdm; |
| 71 | u32 tprt; |
| 72 | u32 tprm; |
| 73 | u32 tbet; |
| 74 | u32 tbem; |
| 75 | u32 mpos; |
Matias Bjørling | 12be5ed | 2015-11-16 15:34:39 +0100 | [diff] [blame] | 76 | u32 mccap; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 77 | u16 cpar; |
Matias Bjørling | 73387e7 | 2015-11-16 15:34:40 +0100 | [diff] [blame] | 78 | }; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 79 | |
| 80 | struct nvm_addr_format { |
| 81 | u8 ch_offset; |
| 82 | u8 ch_len; |
| 83 | u8 lun_offset; |
| 84 | u8 lun_len; |
| 85 | u8 pln_offset; |
| 86 | u8 pln_len; |
| 87 | u8 blk_offset; |
| 88 | u8 blk_len; |
| 89 | u8 pg_offset; |
| 90 | u8 pg_len; |
| 91 | u8 sect_offset; |
| 92 | u8 sect_len; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 93 | }; |
| 94 | |
| 95 | struct nvm_id { |
| 96 | u8 ver_id; |
| 97 | u8 vmnt; |
| 98 | u8 cgrps; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 99 | u32 cap; |
| 100 | u32 dom; |
| 101 | struct nvm_addr_format ppaf; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 102 | struct nvm_id_group groups[4]; |
| 103 | } __packed; |
| 104 | |
| 105 | struct nvm_target { |
| 106 | struct list_head list; |
| 107 | struct nvm_tgt_type *type; |
| 108 | struct gendisk *disk; |
| 109 | }; |
| 110 | |
| 111 | struct nvm_tgt_instance { |
| 112 | struct nvm_tgt_type *tt; |
| 113 | }; |
| 114 | |
| 115 | #define ADDR_EMPTY (~0ULL) |
| 116 | |
| 117 | #define NVM_VERSION_MAJOR 1 |
| 118 | #define NVM_VERSION_MINOR 0 |
| 119 | #define NVM_VERSION_PATCH 0 |
| 120 | |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 121 | #define NVM_BLK_BITS (16) |
Matias Bjørling | 7386af2 | 2015-11-16 15:34:44 +0100 | [diff] [blame] | 122 | #define NVM_PG_BITS (16) |
| 123 | #define NVM_SEC_BITS (8) |
| 124 | #define NVM_PL_BITS (8) |
| 125 | #define NVM_LUN_BITS (8) |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 126 | #define NVM_CH_BITS (8) |
| 127 | |
| 128 | struct ppa_addr { |
Matias Bjørling | 7386af2 | 2015-11-16 15:34:44 +0100 | [diff] [blame] | 129 | /* Generic structure for all addresses */ |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 130 | union { |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 131 | struct { |
Matias Bjørling | 7386af2 | 2015-11-16 15:34:44 +0100 | [diff] [blame] | 132 | u64 blk : NVM_BLK_BITS; |
| 133 | u64 pg : NVM_PG_BITS; |
Matias Bjørling | b7ceb7d | 2015-11-02 17:12:27 +0100 | [diff] [blame] | 134 | u64 sec : NVM_SEC_BITS; |
| 135 | u64 pl : NVM_PL_BITS; |
Matias Bjørling | b7ceb7d | 2015-11-02 17:12:27 +0100 | [diff] [blame] | 136 | u64 lun : NVM_LUN_BITS; |
| 137 | u64 ch : NVM_CH_BITS; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 138 | } g; |
| 139 | |
Matias Bjørling | b7ceb7d | 2015-11-02 17:12:27 +0100 | [diff] [blame] | 140 | u64 ppa; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 141 | }; |
Matias Bjørling | 7386af2 | 2015-11-16 15:34:44 +0100 | [diff] [blame] | 142 | }; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 143 | |
| 144 | struct nvm_rq { |
| 145 | struct nvm_tgt_instance *ins; |
| 146 | struct nvm_dev *dev; |
| 147 | |
| 148 | struct bio *bio; |
| 149 | |
| 150 | union { |
| 151 | struct ppa_addr ppa_addr; |
| 152 | dma_addr_t dma_ppa_list; |
| 153 | }; |
| 154 | |
| 155 | struct ppa_addr *ppa_list; |
| 156 | |
| 157 | void *metadata; |
| 158 | dma_addr_t dma_metadata; |
| 159 | |
| 160 | uint8_t opcode; |
| 161 | uint16_t nr_pages; |
| 162 | uint16_t flags; |
| 163 | }; |
| 164 | |
| 165 | static inline struct nvm_rq *nvm_rq_from_pdu(void *pdu) |
| 166 | { |
| 167 | return pdu - sizeof(struct nvm_rq); |
| 168 | } |
| 169 | |
| 170 | static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata) |
| 171 | { |
| 172 | return rqdata + 1; |
| 173 | } |
| 174 | |
| 175 | struct nvm_block; |
| 176 | |
| 177 | typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *); |
Matias Bjørling | 1145046 | 2015-11-16 15:34:37 +0100 | [diff] [blame] | 178 | typedef int (nvm_bb_update_fn)(struct ppa_addr, int, u8 *, void *); |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 179 | typedef int (nvm_id_fn)(struct request_queue *, struct nvm_id *); |
| 180 | typedef int (nvm_get_l2p_tbl_fn)(struct request_queue *, u64, u32, |
| 181 | nvm_l2p_update_fn *, void *); |
Matias Bjørling | 08236c6 | 2015-11-28 16:49:27 +0100 | [diff] [blame] | 182 | typedef int (nvm_op_bb_tbl_fn)(struct nvm_dev *, struct ppa_addr, int, |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 183 | nvm_bb_update_fn *, void *); |
| 184 | typedef int (nvm_op_set_bb_fn)(struct request_queue *, struct nvm_rq *, int); |
| 185 | typedef int (nvm_submit_io_fn)(struct request_queue *, struct nvm_rq *); |
| 186 | typedef int (nvm_erase_blk_fn)(struct request_queue *, struct nvm_rq *); |
| 187 | typedef void *(nvm_create_dma_pool_fn)(struct request_queue *, char *); |
| 188 | typedef void (nvm_destroy_dma_pool_fn)(void *); |
| 189 | typedef void *(nvm_dev_dma_alloc_fn)(struct request_queue *, void *, gfp_t, |
| 190 | dma_addr_t *); |
| 191 | typedef void (nvm_dev_dma_free_fn)(void *, void*, dma_addr_t); |
| 192 | |
| 193 | struct nvm_dev_ops { |
| 194 | nvm_id_fn *identity; |
| 195 | nvm_get_l2p_tbl_fn *get_l2p_tbl; |
| 196 | nvm_op_bb_tbl_fn *get_bb_tbl; |
Matias Bjørling | 1145046 | 2015-11-16 15:34:37 +0100 | [diff] [blame] | 197 | nvm_op_set_bb_fn *set_bb_tbl; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 198 | |
| 199 | nvm_submit_io_fn *submit_io; |
| 200 | nvm_erase_blk_fn *erase_block; |
| 201 | |
| 202 | nvm_create_dma_pool_fn *create_dma_pool; |
| 203 | nvm_destroy_dma_pool_fn *destroy_dma_pool; |
| 204 | nvm_dev_dma_alloc_fn *dev_dma_alloc; |
| 205 | nvm_dev_dma_free_fn *dev_dma_free; |
| 206 | |
Matias Bjørling | aedf17f | 2015-11-16 15:34:36 +0100 | [diff] [blame] | 207 | unsigned int max_phys_sect; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 208 | }; |
| 209 | |
| 210 | struct nvm_lun { |
| 211 | int id; |
| 212 | |
| 213 | int lun_id; |
| 214 | int chnl_id; |
| 215 | |
Javier Gonzalez | 0b59733 | 2015-11-20 13:47:56 +0100 | [diff] [blame] | 216 | unsigned int nr_inuse_blocks; /* Number of used blocks */ |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 217 | unsigned int nr_free_blocks; /* Number of unused blocks */ |
Javier Gonzalez | 0b59733 | 2015-11-20 13:47:56 +0100 | [diff] [blame] | 218 | unsigned int nr_bad_blocks; /* Number of bad blocks */ |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 219 | struct nvm_block *blocks; |
| 220 | |
| 221 | spinlock_t lock; |
| 222 | }; |
| 223 | |
| 224 | struct nvm_block { |
| 225 | struct list_head list; |
| 226 | struct nvm_lun *lun; |
| 227 | unsigned long id; |
| 228 | |
| 229 | void *priv; |
| 230 | int type; |
| 231 | }; |
| 232 | |
| 233 | struct nvm_dev { |
| 234 | struct nvm_dev_ops *ops; |
| 235 | |
| 236 | struct list_head devices; |
| 237 | struct list_head online_targets; |
| 238 | |
| 239 | /* Media manager */ |
| 240 | struct nvmm_type *mt; |
| 241 | void *mp; |
| 242 | |
| 243 | /* Device information */ |
| 244 | int nr_chnls; |
| 245 | int nr_planes; |
| 246 | int luns_per_chnl; |
| 247 | int sec_per_pg; /* only sectors for a single page */ |
| 248 | int pgs_per_blk; |
| 249 | int blks_per_lun; |
| 250 | int sec_size; |
| 251 | int oob_size; |
Matias Bjørling | 7386af2 | 2015-11-16 15:34:44 +0100 | [diff] [blame] | 252 | struct nvm_addr_format ppaf; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 253 | |
| 254 | /* Calculated/Cached values. These do not reflect the actual usable |
| 255 | * blocks at run-time. |
| 256 | */ |
| 257 | int max_rq_size; |
| 258 | int plane_mode; /* drive device in single, double or quad mode */ |
| 259 | |
| 260 | int sec_per_pl; /* all sectors across planes */ |
| 261 | int sec_per_blk; |
| 262 | int sec_per_lun; |
| 263 | |
| 264 | unsigned long total_pages; |
| 265 | unsigned long total_blocks; |
| 266 | int nr_luns; |
| 267 | unsigned max_pages_per_blk; |
| 268 | |
| 269 | void *ppalist_pool; |
| 270 | |
| 271 | struct nvm_id identity; |
| 272 | |
| 273 | /* Backend device */ |
| 274 | struct request_queue *q; |
| 275 | char name[DISK_NAME_LEN]; |
| 276 | }; |
| 277 | |
Matias Bjørling | 7386af2 | 2015-11-16 15:34:44 +0100 | [diff] [blame] | 278 | static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev, |
| 279 | struct ppa_addr r) |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 280 | { |
| 281 | struct ppa_addr l; |
| 282 | |
Matias Bjørling | 7386af2 | 2015-11-16 15:34:44 +0100 | [diff] [blame] | 283 | l.ppa = ((u64)r.g.blk) << dev->ppaf.blk_offset; |
| 284 | l.ppa |= ((u64)r.g.pg) << dev->ppaf.pg_offset; |
| 285 | l.ppa |= ((u64)r.g.sec) << dev->ppaf.sect_offset; |
| 286 | l.ppa |= ((u64)r.g.pl) << dev->ppaf.pln_offset; |
| 287 | l.ppa |= ((u64)r.g.lun) << dev->ppaf.lun_offset; |
| 288 | l.ppa |= ((u64)r.g.ch) << dev->ppaf.ch_offset; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 289 | |
| 290 | return l; |
| 291 | } |
| 292 | |
Matias Bjørling | 7386af2 | 2015-11-16 15:34:44 +0100 | [diff] [blame] | 293 | static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev, |
| 294 | struct ppa_addr r) |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 295 | { |
| 296 | struct ppa_addr l; |
| 297 | |
Matias Bjørling | 7386af2 | 2015-11-16 15:34:44 +0100 | [diff] [blame] | 298 | /* |
| 299 | * (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc. |
| 300 | */ |
| 301 | l.g.blk = (r.ppa >> dev->ppaf.blk_offset) & |
| 302 | (((1 << dev->ppaf.blk_len) - 1)); |
| 303 | l.g.pg |= (r.ppa >> dev->ppaf.pg_offset) & |
| 304 | (((1 << dev->ppaf.pg_len) - 1)); |
| 305 | l.g.sec |= (r.ppa >> dev->ppaf.sect_offset) & |
| 306 | (((1 << dev->ppaf.sect_len) - 1)); |
| 307 | l.g.pl |= (r.ppa >> dev->ppaf.pln_offset) & |
| 308 | (((1 << dev->ppaf.pln_len) - 1)); |
| 309 | l.g.lun |= (r.ppa >> dev->ppaf.lun_offset) & |
| 310 | (((1 << dev->ppaf.lun_len) - 1)); |
| 311 | l.g.ch |= (r.ppa >> dev->ppaf.ch_offset) & |
| 312 | (((1 << dev->ppaf.ch_len) - 1)); |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 313 | |
| 314 | return l; |
| 315 | } |
| 316 | |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 317 | static inline int ppa_empty(struct ppa_addr ppa_addr) |
| 318 | { |
| 319 | return (ppa_addr.ppa == ADDR_EMPTY); |
| 320 | } |
| 321 | |
| 322 | static inline void ppa_set_empty(struct ppa_addr *ppa_addr) |
| 323 | { |
| 324 | ppa_addr->ppa = ADDR_EMPTY; |
| 325 | } |
| 326 | |
| 327 | static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev, |
| 328 | struct nvm_block *blk) |
| 329 | { |
| 330 | struct ppa_addr ppa; |
| 331 | struct nvm_lun *lun = blk->lun; |
| 332 | |
| 333 | ppa.ppa = 0; |
| 334 | ppa.g.blk = blk->id % dev->blks_per_lun; |
| 335 | ppa.g.lun = lun->lun_id; |
| 336 | ppa.g.ch = lun->chnl_id; |
| 337 | |
| 338 | return ppa; |
| 339 | } |
| 340 | |
Jens Axboe | dece163 | 2015-11-05 10:41:16 -0700 | [diff] [blame] | 341 | typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *); |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 342 | typedef sector_t (nvm_tgt_capacity_fn)(void *); |
| 343 | typedef int (nvm_tgt_end_io_fn)(struct nvm_rq *, int); |
| 344 | typedef void *(nvm_tgt_init_fn)(struct nvm_dev *, struct gendisk *, int, int); |
| 345 | typedef void (nvm_tgt_exit_fn)(void *); |
| 346 | |
| 347 | struct nvm_tgt_type { |
| 348 | const char *name; |
| 349 | unsigned int version[3]; |
| 350 | |
| 351 | /* target entry points */ |
| 352 | nvm_tgt_make_rq_fn *make_rq; |
| 353 | nvm_tgt_capacity_fn *capacity; |
| 354 | nvm_tgt_end_io_fn *end_io; |
| 355 | |
| 356 | /* module-specific init/teardown */ |
| 357 | nvm_tgt_init_fn *init; |
| 358 | nvm_tgt_exit_fn *exit; |
| 359 | |
| 360 | /* For internal use */ |
| 361 | struct list_head list; |
| 362 | }; |
| 363 | |
| 364 | extern int nvm_register_target(struct nvm_tgt_type *); |
| 365 | extern void nvm_unregister_target(struct nvm_tgt_type *); |
| 366 | |
| 367 | extern void *nvm_dev_dma_alloc(struct nvm_dev *, gfp_t, dma_addr_t *); |
| 368 | extern void nvm_dev_dma_free(struct nvm_dev *, void *, dma_addr_t); |
| 369 | |
| 370 | typedef int (nvmm_register_fn)(struct nvm_dev *); |
| 371 | typedef void (nvmm_unregister_fn)(struct nvm_dev *); |
| 372 | typedef struct nvm_block *(nvmm_get_blk_fn)(struct nvm_dev *, |
| 373 | struct nvm_lun *, unsigned long); |
| 374 | typedef void (nvmm_put_blk_fn)(struct nvm_dev *, struct nvm_block *); |
| 375 | typedef int (nvmm_open_blk_fn)(struct nvm_dev *, struct nvm_block *); |
| 376 | typedef int (nvmm_close_blk_fn)(struct nvm_dev *, struct nvm_block *); |
| 377 | typedef void (nvmm_flush_blk_fn)(struct nvm_dev *, struct nvm_block *); |
| 378 | typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *); |
| 379 | typedef int (nvmm_end_io_fn)(struct nvm_rq *, int); |
| 380 | typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, |
| 381 | unsigned long); |
| 382 | typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int); |
Javier Gonzalez | 2fde0e4 | 2015-11-20 13:47:57 +0100 | [diff] [blame] | 383 | typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *); |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 384 | |
| 385 | struct nvmm_type { |
| 386 | const char *name; |
| 387 | unsigned int version[3]; |
| 388 | |
| 389 | nvmm_register_fn *register_mgr; |
| 390 | nvmm_unregister_fn *unregister_mgr; |
| 391 | |
| 392 | /* Block administration callbacks */ |
| 393 | nvmm_get_blk_fn *get_blk; |
| 394 | nvmm_put_blk_fn *put_blk; |
| 395 | nvmm_open_blk_fn *open_blk; |
| 396 | nvmm_close_blk_fn *close_blk; |
| 397 | nvmm_flush_blk_fn *flush_blk; |
| 398 | |
| 399 | nvmm_submit_io_fn *submit_io; |
| 400 | nvmm_end_io_fn *end_io; |
| 401 | nvmm_erase_blk_fn *erase_blk; |
| 402 | |
| 403 | /* Configuration management */ |
| 404 | nvmm_get_lun_fn *get_lun; |
| 405 | |
| 406 | /* Statistics */ |
Javier Gonzalez | 2fde0e4 | 2015-11-20 13:47:57 +0100 | [diff] [blame] | 407 | nvmm_lun_info_print_fn *lun_info_print; |
Matias Bjørling | cd9e980 | 2015-10-28 19:54:55 +0100 | [diff] [blame] | 408 | struct list_head list; |
| 409 | }; |
| 410 | |
| 411 | extern int nvm_register_mgr(struct nvmm_type *); |
| 412 | extern void nvm_unregister_mgr(struct nvmm_type *); |
| 413 | |
| 414 | extern struct nvm_block *nvm_get_blk(struct nvm_dev *, struct nvm_lun *, |
| 415 | unsigned long); |
| 416 | extern void nvm_put_blk(struct nvm_dev *, struct nvm_block *); |
| 417 | |
| 418 | extern int nvm_register(struct request_queue *, char *, |
| 419 | struct nvm_dev_ops *); |
| 420 | extern void nvm_unregister(char *); |
| 421 | |
| 422 | extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *); |
| 423 | extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *); |
| 424 | #else /* CONFIG_NVM */ |
| 425 | struct nvm_dev_ops; |
| 426 | |
| 427 | static inline int nvm_register(struct request_queue *q, char *disk_name, |
| 428 | struct nvm_dev_ops *ops) |
| 429 | { |
| 430 | return -EINVAL; |
| 431 | } |
| 432 | static inline void nvm_unregister(char *disk_name) {} |
| 433 | #endif /* CONFIG_NVM */ |
| 434 | #endif /* LIGHTNVM.H */ |