2 * Copyright (C) 2015 IT University of Copenhagen. All rights reserved.
3 * Initial release: Matias Bjorling <m@bjorling.me>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version
7 * 2 as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; see the file COPYING. If not, write to
16 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
21 #include <linux/list.h>
22 #include <linux/types.h>
23 #include <linux/sem.h>
24 #include <linux/bitmap.h>
25 #include <linux/module.h>
26 #include <linux/miscdevice.h>
27 #include <linux/lightnvm.h>
28 #include <linux/sched/sysctl.h>
30 static LIST_HEAD(nvm_tgt_types
);
31 static DECLARE_RWSEM(nvm_tgtt_lock
);
32 static LIST_HEAD(nvm_mgrs
);
33 static LIST_HEAD(nvm_devices
);
34 static DECLARE_RWSEM(nvm_lock
);
36 struct nvm_tgt_type
*nvm_find_target_type(const char *name
, int lock
)
38 struct nvm_tgt_type
*tmp
, *tt
= NULL
;
41 down_write(&nvm_tgtt_lock
);
43 list_for_each_entry(tmp
, &nvm_tgt_types
, list
)
44 if (!strcmp(name
, tmp
->name
)) {
50 up_write(&nvm_tgtt_lock
);
53 EXPORT_SYMBOL(nvm_find_target_type
);
55 int nvm_register_tgt_type(struct nvm_tgt_type
*tt
)
59 down_write(&nvm_tgtt_lock
);
60 if (nvm_find_target_type(tt
->name
, 0))
63 list_add(&tt
->list
, &nvm_tgt_types
);
64 up_write(&nvm_tgtt_lock
);
68 EXPORT_SYMBOL(nvm_register_tgt_type
);
70 void nvm_unregister_tgt_type(struct nvm_tgt_type
*tt
)
75 down_write(&nvm_lock
);
79 EXPORT_SYMBOL(nvm_unregister_tgt_type
);
81 void *nvm_dev_dma_alloc(struct nvm_dev
*dev
, gfp_t mem_flags
,
82 dma_addr_t
*dma_handler
)
84 return dev
->ops
->dev_dma_alloc(dev
, dev
->dma_pool
, mem_flags
,
87 EXPORT_SYMBOL(nvm_dev_dma_alloc
);
89 void nvm_dev_dma_free(struct nvm_dev
*dev
, void *addr
, dma_addr_t dma_handler
)
91 dev
->ops
->dev_dma_free(dev
->dma_pool
, addr
, dma_handler
);
93 EXPORT_SYMBOL(nvm_dev_dma_free
);
95 static struct nvmm_type
*nvm_find_mgr_type(const char *name
)
99 list_for_each_entry(mt
, &nvm_mgrs
, list
)
100 if (!strcmp(name
, mt
->name
))
106 static struct nvmm_type
*nvm_init_mgr(struct nvm_dev
*dev
)
108 struct nvmm_type
*mt
;
111 lockdep_assert_held(&nvm_lock
);
113 list_for_each_entry(mt
, &nvm_mgrs
, list
) {
114 if (strncmp(dev
->sb
.mmtype
, mt
->name
, NVM_MMTYPE_LEN
))
117 ret
= mt
->register_mgr(dev
);
119 pr_err("nvm: media mgr failed to init (%d) on dev %s\n",
121 return NULL
; /* initialization failed */
129 int nvm_register_mgr(struct nvmm_type
*mt
)
134 down_write(&nvm_lock
);
135 if (nvm_find_mgr_type(mt
->name
)) {
139 list_add(&mt
->list
, &nvm_mgrs
);
142 /* try to register media mgr if any device have none configured */
143 list_for_each_entry(dev
, &nvm_devices
, devices
) {
147 dev
->mt
= nvm_init_mgr(dev
);
154 EXPORT_SYMBOL(nvm_register_mgr
);
156 void nvm_unregister_mgr(struct nvmm_type
*mt
)
161 down_write(&nvm_lock
);
165 EXPORT_SYMBOL(nvm_unregister_mgr
);
167 static struct nvm_dev
*nvm_find_nvm_dev(const char *name
)
171 list_for_each_entry(dev
, &nvm_devices
, devices
)
172 if (!strcmp(name
, dev
->name
))
178 static void nvm_tgt_generic_to_addr_mode(struct nvm_tgt_dev
*tgt_dev
,
181 struct nvm_dev
*dev
= tgt_dev
->parent
;
184 if (rqd
->nr_ppas
> 1) {
185 for (i
= 0; i
< rqd
->nr_ppas
; i
++) {
186 rqd
->ppa_list
[i
] = dev
->mt
->trans_ppa(tgt_dev
,
187 rqd
->ppa_list
[i
], TRANS_TGT_TO_DEV
);
188 rqd
->ppa_list
[i
] = generic_to_dev_addr(dev
,
192 rqd
->ppa_addr
= dev
->mt
->trans_ppa(tgt_dev
, rqd
->ppa_addr
,
194 rqd
->ppa_addr
= generic_to_dev_addr(dev
, rqd
->ppa_addr
);
198 int nvm_set_bb_tbl(struct nvm_dev
*dev
, struct ppa_addr
*ppas
, int nr_ppas
,
204 if (nr_ppas
> dev
->ops
->max_phys_sect
) {
205 pr_err("nvm: unable to update all sysblocks atomically\n");
209 memset(&rqd
, 0, sizeof(struct nvm_rq
));
211 nvm_set_rqd_ppalist(dev
, &rqd
, ppas
, nr_ppas
, 1);
212 nvm_generic_to_addr_mode(dev
, &rqd
);
214 ret
= dev
->ops
->set_bb_tbl(dev
, &rqd
.ppa_addr
, rqd
.nr_ppas
, type
);
215 nvm_free_rqd_ppalist(dev
, &rqd
);
217 pr_err("nvm: sysblk failed bb mark\n");
223 EXPORT_SYMBOL(nvm_set_bb_tbl
);
225 int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev
*tgt_dev
, struct ppa_addr
*ppas
,
226 int nr_ppas
, int type
)
228 struct nvm_dev
*dev
= tgt_dev
->parent
;
232 if (nr_ppas
> dev
->ops
->max_phys_sect
) {
233 pr_err("nvm: unable to update all blocks atomically\n");
237 memset(&rqd
, 0, sizeof(struct nvm_rq
));
239 nvm_set_rqd_ppalist(dev
, &rqd
, ppas
, nr_ppas
, 1);
240 nvm_tgt_generic_to_addr_mode(tgt_dev
, &rqd
);
242 ret
= dev
->ops
->set_bb_tbl(dev
, &rqd
.ppa_addr
, rqd
.nr_ppas
, type
);
243 nvm_free_rqd_ppalist(dev
, &rqd
);
245 pr_err("nvm: sysblk failed bb mark\n");
251 EXPORT_SYMBOL(nvm_set_tgt_bb_tbl
);
253 int nvm_max_phys_sects(struct nvm_tgt_dev
*tgt_dev
)
255 struct nvm_dev
*dev
= tgt_dev
->parent
;
257 return dev
->ops
->max_phys_sect
;
259 EXPORT_SYMBOL(nvm_max_phys_sects
);
261 int nvm_submit_io(struct nvm_tgt_dev
*tgt_dev
, struct nvm_rq
*rqd
)
263 struct nvm_dev
*dev
= tgt_dev
->parent
;
265 return dev
->mt
->submit_io(tgt_dev
, rqd
);
267 EXPORT_SYMBOL(nvm_submit_io
);
269 int nvm_erase_blk(struct nvm_tgt_dev
*tgt_dev
, struct ppa_addr
*p
, int flags
)
271 struct nvm_dev
*dev
= tgt_dev
->parent
;
273 return dev
->mt
->erase_blk(tgt_dev
, p
, flags
);
275 EXPORT_SYMBOL(nvm_erase_blk
);
277 int nvm_get_l2p_tbl(struct nvm_tgt_dev
*tgt_dev
, u64 slba
, u32 nlb
,
278 nvm_l2p_update_fn
*update_l2p
, void *priv
)
280 struct nvm_dev
*dev
= tgt_dev
->parent
;
282 if (!dev
->ops
->get_l2p_tbl
)
285 return dev
->ops
->get_l2p_tbl(dev
, slba
, nlb
, update_l2p
, priv
);
287 EXPORT_SYMBOL(nvm_get_l2p_tbl
);
289 int nvm_get_area(struct nvm_tgt_dev
*tgt_dev
, sector_t
*lba
, sector_t len
)
291 struct nvm_dev
*dev
= tgt_dev
->parent
;
293 return dev
->mt
->get_area(dev
, lba
, len
);
295 EXPORT_SYMBOL(nvm_get_area
);
297 void nvm_put_area(struct nvm_tgt_dev
*tgt_dev
, sector_t lba
)
299 struct nvm_dev
*dev
= tgt_dev
->parent
;
301 dev
->mt
->put_area(dev
, lba
);
303 EXPORT_SYMBOL(nvm_put_area
);
305 void nvm_addr_to_generic_mode(struct nvm_dev
*dev
, struct nvm_rq
*rqd
)
309 if (rqd
->nr_ppas
> 1) {
310 for (i
= 0; i
< rqd
->nr_ppas
; i
++)
311 rqd
->ppa_list
[i
] = dev_to_generic_addr(dev
,
314 rqd
->ppa_addr
= dev_to_generic_addr(dev
, rqd
->ppa_addr
);
317 EXPORT_SYMBOL(nvm_addr_to_generic_mode
);
319 void nvm_generic_to_addr_mode(struct nvm_dev
*dev
, struct nvm_rq
*rqd
)
323 if (rqd
->nr_ppas
> 1) {
324 for (i
= 0; i
< rqd
->nr_ppas
; i
++)
325 rqd
->ppa_list
[i
] = generic_to_dev_addr(dev
,
328 rqd
->ppa_addr
= generic_to_dev_addr(dev
, rqd
->ppa_addr
);
331 EXPORT_SYMBOL(nvm_generic_to_addr_mode
);
333 int nvm_set_rqd_ppalist(struct nvm_dev
*dev
, struct nvm_rq
*rqd
,
334 const struct ppa_addr
*ppas
, int nr_ppas
, int vblk
)
336 struct nvm_geo
*geo
= &dev
->geo
;
337 int i
, plane_cnt
, pl_idx
;
340 if ((!vblk
|| geo
->plane_mode
== NVM_PLANE_SINGLE
) && nr_ppas
== 1) {
341 rqd
->nr_ppas
= nr_ppas
;
342 rqd
->ppa_addr
= ppas
[0];
347 rqd
->nr_ppas
= nr_ppas
;
348 rqd
->ppa_list
= nvm_dev_dma_alloc(dev
, GFP_KERNEL
, &rqd
->dma_ppa_list
);
349 if (!rqd
->ppa_list
) {
350 pr_err("nvm: failed to allocate dma memory\n");
355 for (i
= 0; i
< nr_ppas
; i
++)
356 rqd
->ppa_list
[i
] = ppas
[i
];
358 plane_cnt
= geo
->plane_mode
;
359 rqd
->nr_ppas
*= plane_cnt
;
361 for (i
= 0; i
< nr_ppas
; i
++) {
362 for (pl_idx
= 0; pl_idx
< plane_cnt
; pl_idx
++) {
365 rqd
->ppa_list
[(pl_idx
* nr_ppas
) + i
] = ppa
;
372 EXPORT_SYMBOL(nvm_set_rqd_ppalist
);
374 void nvm_free_rqd_ppalist(struct nvm_dev
*dev
, struct nvm_rq
*rqd
)
379 nvm_dev_dma_free(dev
, rqd
->ppa_list
, rqd
->dma_ppa_list
);
381 EXPORT_SYMBOL(nvm_free_rqd_ppalist
);
383 int nvm_erase_ppa(struct nvm_dev
*dev
, struct ppa_addr
*ppas
, int nr_ppas
,
389 if (!dev
->ops
->erase_block
)
392 memset(&rqd
, 0, sizeof(struct nvm_rq
));
394 ret
= nvm_set_rqd_ppalist(dev
, &rqd
, ppas
, nr_ppas
, 1);
398 nvm_generic_to_addr_mode(dev
, &rqd
);
402 ret
= dev
->ops
->erase_block(dev
, &rqd
);
404 nvm_free_rqd_ppalist(dev
, &rqd
);
408 EXPORT_SYMBOL(nvm_erase_ppa
);
410 void nvm_end_io(struct nvm_rq
*rqd
, int error
)
415 EXPORT_SYMBOL(nvm_end_io
);
417 static void nvm_end_io_sync(struct nvm_rq
*rqd
)
419 struct completion
*waiting
= rqd
->wait
;
426 static int __nvm_submit_ppa(struct nvm_dev
*dev
, struct nvm_rq
*rqd
, int opcode
,
427 int flags
, void *buf
, int len
)
429 DECLARE_COMPLETION_ONSTACK(wait
);
432 unsigned long hang_check
;
434 bio
= bio_map_kern(dev
->q
, buf
, len
, GFP_KERNEL
);
435 if (IS_ERR_OR_NULL(bio
))
438 nvm_generic_to_addr_mode(dev
, rqd
);
441 rqd
->opcode
= opcode
;
445 rqd
->end_io
= nvm_end_io_sync
;
447 ret
= dev
->ops
->submit_io(dev
, rqd
);
453 /* Prevent hang_check timer from firing at us during very long I/O */
454 hang_check
= sysctl_hung_task_timeout_secs
;
456 while (!wait_for_completion_io_timeout(&wait
,
457 hang_check
* (HZ
/2)))
460 wait_for_completion_io(&wait
);
466 * nvm_submit_ppa_list - submit user-defined ppa list to device. The user must
467 * take to free ppa list if necessary.
469 * @ppa_list: user created ppa_list
470 * @nr_ppas: length of ppa_list
471 * @opcode: device opcode
472 * @flags: device flags
474 * @len: data buffer length
476 int nvm_submit_ppa_list(struct nvm_dev
*dev
, struct ppa_addr
*ppa_list
,
477 int nr_ppas
, int opcode
, int flags
, void *buf
, int len
)
481 if (dev
->ops
->max_phys_sect
< nr_ppas
)
484 memset(&rqd
, 0, sizeof(struct nvm_rq
));
486 rqd
.nr_ppas
= nr_ppas
;
488 rqd
.ppa_list
= ppa_list
;
490 rqd
.ppa_addr
= ppa_list
[0];
492 return __nvm_submit_ppa(dev
, &rqd
, opcode
, flags
, buf
, len
);
494 EXPORT_SYMBOL(nvm_submit_ppa_list
);
497 * nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded
498 * as single, dual, quad plane PPAs depending on device type.
500 * @ppa: user created ppa_list
501 * @nr_ppas: length of ppa_list
502 * @opcode: device opcode
503 * @flags: device flags
505 * @len: data buffer length
507 int nvm_submit_ppa(struct nvm_dev
*dev
, struct ppa_addr
*ppa
, int nr_ppas
,
508 int opcode
, int flags
, void *buf
, int len
)
513 memset(&rqd
, 0, sizeof(struct nvm_rq
));
514 ret
= nvm_set_rqd_ppalist(dev
, &rqd
, ppa
, nr_ppas
, 1);
518 ret
= __nvm_submit_ppa(dev
, &rqd
, opcode
, flags
, buf
, len
);
520 nvm_free_rqd_ppalist(dev
, &rqd
);
524 EXPORT_SYMBOL(nvm_submit_ppa
);
527 * folds a bad block list from its plane representation to its virtual
528 * block representation. The fold is done in place and reduced size is
531 * If any of the planes status are bad or grown bad block, the virtual block
532 * is marked bad. If not bad, the first plane state acts as the block state.
534 int nvm_bb_tbl_fold(struct nvm_dev
*dev
, u8
*blks
, int nr_blks
)
536 struct nvm_geo
*geo
= &dev
->geo
;
537 int blk
, offset
, pl
, blktype
;
539 if (nr_blks
!= geo
->blks_per_lun
* geo
->plane_mode
)
542 for (blk
= 0; blk
< geo
->blks_per_lun
; blk
++) {
543 offset
= blk
* geo
->plane_mode
;
544 blktype
= blks
[offset
];
546 /* Bad blocks on any planes take precedence over other types */
547 for (pl
= 0; pl
< geo
->plane_mode
; pl
++) {
548 if (blks
[offset
+ pl
] &
549 (NVM_BLK_T_BAD
|NVM_BLK_T_GRWN_BAD
)) {
550 blktype
= blks
[offset
+ pl
];
558 return geo
->blks_per_lun
;
560 EXPORT_SYMBOL(nvm_bb_tbl_fold
);
562 int nvm_get_bb_tbl(struct nvm_dev
*dev
, struct ppa_addr ppa
, u8
*blks
)
564 ppa
= generic_to_dev_addr(dev
, ppa
);
566 return dev
->ops
->get_bb_tbl(dev
, ppa
, blks
);
568 EXPORT_SYMBOL(nvm_get_bb_tbl
);
570 int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev
*tgt_dev
, struct ppa_addr ppa
,
573 struct nvm_dev
*dev
= tgt_dev
->parent
;
575 ppa
= dev
->mt
->trans_ppa(tgt_dev
, ppa
, TRANS_TGT_TO_DEV
);
576 return nvm_get_bb_tbl(dev
, ppa
, blks
);
578 EXPORT_SYMBOL(nvm_get_tgt_bb_tbl
);
580 static int nvm_init_slc_tbl(struct nvm_dev
*dev
, struct nvm_id_group
*grp
)
582 struct nvm_geo
*geo
= &dev
->geo
;
585 dev
->lps_per_blk
= geo
->pgs_per_blk
;
586 dev
->lptbl
= kcalloc(dev
->lps_per_blk
, sizeof(int), GFP_KERNEL
);
590 /* Just a linear array */
591 for (i
= 0; i
< dev
->lps_per_blk
; i
++)
597 static int nvm_init_mlc_tbl(struct nvm_dev
*dev
, struct nvm_id_group
*grp
)
600 struct nvm_id_lp_mlc
*mlc
= &grp
->lptbl
.mlc
;
605 dev
->lps_per_blk
= mlc
->num_pairs
;
606 dev
->lptbl
= kcalloc(dev
->lps_per_blk
, sizeof(int), GFP_KERNEL
);
610 /* The lower page table encoding consists of a list of bytes, where each
611 * has a lower and an upper half. The first half byte maintains the
612 * increment value and every value after is an offset added to the
613 * previous incrementation value
615 dev
->lptbl
[0] = mlc
->pairs
[0] & 0xF;
616 for (i
= 1; i
< dev
->lps_per_blk
; i
++) {
617 p
= mlc
->pairs
[i
>> 1];
618 if (i
& 0x1) /* upper */
619 dev
->lptbl
[i
] = dev
->lptbl
[i
- 1] + ((p
& 0xF0) >> 4);
621 dev
->lptbl
[i
] = dev
->lptbl
[i
- 1] + (p
& 0xF);
627 static int nvm_core_init(struct nvm_dev
*dev
)
629 struct nvm_id
*id
= &dev
->identity
;
630 struct nvm_id_group
*grp
= &id
->groups
[0];
631 struct nvm_geo
*geo
= &dev
->geo
;
634 /* Whole device values */
635 geo
->nr_chnls
= grp
->num_ch
;
636 geo
->luns_per_chnl
= grp
->num_lun
;
638 /* Generic device values */
639 geo
->pgs_per_blk
= grp
->num_pg
;
640 geo
->blks_per_lun
= grp
->num_blk
;
641 geo
->nr_planes
= grp
->num_pln
;
642 geo
->fpg_size
= grp
->fpg_sz
;
643 geo
->pfpg_size
= grp
->fpg_sz
* grp
->num_pln
;
644 geo
->sec_size
= grp
->csecs
;
645 geo
->oob_size
= grp
->sos
;
646 geo
->sec_per_pg
= grp
->fpg_sz
/ grp
->csecs
;
647 geo
->mccap
= grp
->mccap
;
648 memcpy(&geo
->ppaf
, &id
->ppaf
, sizeof(struct nvm_addr_format
));
650 geo
->plane_mode
= NVM_PLANE_SINGLE
;
651 geo
->max_rq_size
= dev
->ops
->max_phys_sect
* geo
->sec_size
;
653 if (grp
->mpos
& 0x020202)
654 geo
->plane_mode
= NVM_PLANE_DOUBLE
;
655 if (grp
->mpos
& 0x040404)
656 geo
->plane_mode
= NVM_PLANE_QUAD
;
658 if (grp
->mtype
!= 0) {
659 pr_err("nvm: memory type not supported\n");
663 /* calculated values */
664 geo
->sec_per_pl
= geo
->sec_per_pg
* geo
->nr_planes
;
665 geo
->sec_per_blk
= geo
->sec_per_pl
* geo
->pgs_per_blk
;
666 geo
->sec_per_lun
= geo
->sec_per_blk
* geo
->blks_per_lun
;
667 geo
->nr_luns
= geo
->luns_per_chnl
* geo
->nr_chnls
;
669 dev
->total_secs
= geo
->nr_luns
* geo
->sec_per_lun
;
670 dev
->lun_map
= kcalloc(BITS_TO_LONGS(geo
->nr_luns
),
671 sizeof(unsigned long), GFP_KERNEL
);
675 switch (grp
->fmtype
) {
676 case NVM_ID_FMTYPE_SLC
:
677 if (nvm_init_slc_tbl(dev
, grp
)) {
682 case NVM_ID_FMTYPE_MLC
:
683 if (nvm_init_mlc_tbl(dev
, grp
)) {
689 pr_err("nvm: flash type not supported\n");
694 mutex_init(&dev
->mlock
);
695 spin_lock_init(&dev
->lock
);
697 blk_queue_logical_block_size(dev
->q
, geo
->sec_size
);
705 static void nvm_free_mgr(struct nvm_dev
*dev
)
710 dev
->mt
->unregister_mgr(dev
);
714 void nvm_free(struct nvm_dev
*dev
)
722 dev
->ops
->destroy_dma_pool(dev
->dma_pool
);
729 static int nvm_init(struct nvm_dev
*dev
)
731 struct nvm_geo
*geo
= &dev
->geo
;
734 if (!dev
->q
|| !dev
->ops
)
737 if (dev
->ops
->identity(dev
, &dev
->identity
)) {
738 pr_err("nvm: device could not be identified\n");
742 pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n",
743 dev
->identity
.ver_id
, dev
->identity
.vmnt
,
744 dev
->identity
.cgrps
);
746 if (dev
->identity
.ver_id
!= 1) {
747 pr_err("nvm: device not supported by kernel.");
751 if (dev
->identity
.cgrps
!= 1) {
752 pr_err("nvm: only one group configuration supported.");
756 ret
= nvm_core_init(dev
);
758 pr_err("nvm: could not initialize core structures.\n");
762 pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n",
763 dev
->name
, geo
->sec_per_pg
, geo
->nr_planes
,
764 geo
->pgs_per_blk
, geo
->blks_per_lun
,
765 geo
->nr_luns
, geo
->nr_chnls
);
768 pr_err("nvm: failed to initialize nvm\n");
772 struct nvm_dev
*nvm_alloc_dev(int node
)
774 return kzalloc_node(sizeof(struct nvm_dev
), GFP_KERNEL
, node
);
776 EXPORT_SYMBOL(nvm_alloc_dev
);
778 int nvm_register(struct nvm_dev
*dev
)
786 if (dev
->ops
->max_phys_sect
> 256) {
787 pr_info("nvm: max sectors supported is 256.\n");
792 if (dev
->ops
->max_phys_sect
> 1) {
793 dev
->dma_pool
= dev
->ops
->create_dma_pool(dev
, "ppalist");
794 if (!dev
->dma_pool
) {
795 pr_err("nvm: could not create dma pool\n");
801 if (dev
->identity
.cap
& NVM_ID_DCAP_BBLKMGMT
) {
802 ret
= nvm_get_sysblock(dev
, &dev
->sb
);
804 pr_err("nvm: device not initialized.\n");
806 pr_err("nvm: err (%d) on device initialization\n", ret
);
809 /* register device with a supported media manager */
810 down_write(&nvm_lock
);
812 dev
->mt
= nvm_init_mgr(dev
);
813 list_add(&dev
->devices
, &nvm_devices
);
821 EXPORT_SYMBOL(nvm_register
);
823 void nvm_unregister(struct nvm_dev
*dev
)
825 down_write(&nvm_lock
);
826 list_del(&dev
->devices
);
831 EXPORT_SYMBOL(nvm_unregister
);
833 static int __nvm_configure_create(struct nvm_ioctl_create
*create
)
836 struct nvm_ioctl_create_simple
*s
;
838 down_write(&nvm_lock
);
839 dev
= nvm_find_nvm_dev(create
->dev
);
843 pr_err("nvm: device not found\n");
848 pr_info("nvm: device has no media manager registered.\n");
852 if (create
->conf
.type
!= NVM_CONFIG_TYPE_SIMPLE
) {
853 pr_err("nvm: config type not valid\n");
858 if (s
->lun_begin
> s
->lun_end
|| s
->lun_end
> dev
->geo
.nr_luns
) {
859 pr_err("nvm: lun out of bound (%u:%u > %u)\n",
860 s
->lun_begin
, s
->lun_end
, dev
->geo
.nr_luns
);
864 return dev
->mt
->create_tgt(dev
, create
);
867 static long nvm_ioctl_info(struct file
*file
, void __user
*arg
)
869 struct nvm_ioctl_info
*info
;
870 struct nvm_tgt_type
*tt
;
873 if (!capable(CAP_SYS_ADMIN
))
876 info
= memdup_user(arg
, sizeof(struct nvm_ioctl_info
));
880 info
->version
[0] = NVM_VERSION_MAJOR
;
881 info
->version
[1] = NVM_VERSION_MINOR
;
882 info
->version
[2] = NVM_VERSION_PATCH
;
884 down_write(&nvm_lock
);
885 list_for_each_entry(tt
, &nvm_tgt_types
, list
) {
886 struct nvm_ioctl_info_tgt
*tgt
= &info
->tgts
[tgt_iter
];
888 tgt
->version
[0] = tt
->version
[0];
889 tgt
->version
[1] = tt
->version
[1];
890 tgt
->version
[2] = tt
->version
[2];
891 strncpy(tgt
->tgtname
, tt
->name
, NVM_TTYPE_NAME_MAX
);
896 info
->tgtsize
= tgt_iter
;
899 if (copy_to_user(arg
, info
, sizeof(struct nvm_ioctl_info
))) {
908 static long nvm_ioctl_get_devices(struct file
*file
, void __user
*arg
)
910 struct nvm_ioctl_get_devices
*devices
;
914 if (!capable(CAP_SYS_ADMIN
))
917 devices
= kzalloc(sizeof(struct nvm_ioctl_get_devices
), GFP_KERNEL
);
921 down_write(&nvm_lock
);
922 list_for_each_entry(dev
, &nvm_devices
, devices
) {
923 struct nvm_ioctl_device_info
*info
= &devices
->info
[i
];
925 sprintf(info
->devname
, "%s", dev
->name
);
927 info
->bmversion
[0] = dev
->mt
->version
[0];
928 info
->bmversion
[1] = dev
->mt
->version
[1];
929 info
->bmversion
[2] = dev
->mt
->version
[2];
930 sprintf(info
->bmname
, "%s", dev
->mt
->name
);
932 sprintf(info
->bmname
, "none");
937 pr_err("nvm: max 31 devices can be reported.\n");
943 devices
->nr_devices
= i
;
945 if (copy_to_user(arg
, devices
,
946 sizeof(struct nvm_ioctl_get_devices
))) {
955 static long nvm_ioctl_dev_create(struct file
*file
, void __user
*arg
)
957 struct nvm_ioctl_create create
;
959 if (!capable(CAP_SYS_ADMIN
))
962 if (copy_from_user(&create
, arg
, sizeof(struct nvm_ioctl_create
)))
965 create
.dev
[DISK_NAME_LEN
- 1] = '\0';
966 create
.tgttype
[NVM_TTYPE_NAME_MAX
- 1] = '\0';
967 create
.tgtname
[DISK_NAME_LEN
- 1] = '\0';
969 if (create
.flags
!= 0) {
970 pr_err("nvm: no flags supported\n");
974 return __nvm_configure_create(&create
);
977 static long nvm_ioctl_dev_remove(struct file
*file
, void __user
*arg
)
979 struct nvm_ioctl_remove remove
;
983 if (!capable(CAP_SYS_ADMIN
))
986 if (copy_from_user(&remove
, arg
, sizeof(struct nvm_ioctl_remove
)))
989 remove
.tgtname
[DISK_NAME_LEN
- 1] = '\0';
991 if (remove
.flags
!= 0) {
992 pr_err("nvm: no flags supported\n");
996 list_for_each_entry(dev
, &nvm_devices
, devices
) {
997 ret
= dev
->mt
->remove_tgt(dev
, &remove
);
1005 static void nvm_setup_nvm_sb_info(struct nvm_sb_info
*info
)
1008 info
->erase_cnt
= 0;
1012 static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init
*init
)
1014 struct nvm_dev
*dev
;
1015 struct nvm_sb_info info
;
1018 down_write(&nvm_lock
);
1019 dev
= nvm_find_nvm_dev(init
->dev
);
1020 up_write(&nvm_lock
);
1022 pr_err("nvm: device not found\n");
1026 nvm_setup_nvm_sb_info(&info
);
1028 strncpy(info
.mmtype
, init
->mmtype
, NVM_MMTYPE_LEN
);
1029 info
.fs_ppa
.ppa
= -1;
1031 if (dev
->identity
.cap
& NVM_ID_DCAP_BBLKMGMT
) {
1032 ret
= nvm_init_sysblock(dev
, &info
);
1037 memcpy(&dev
->sb
, &info
, sizeof(struct nvm_sb_info
));
1039 down_write(&nvm_lock
);
1040 dev
->mt
= nvm_init_mgr(dev
);
1041 up_write(&nvm_lock
);
1046 static long nvm_ioctl_dev_init(struct file
*file
, void __user
*arg
)
1048 struct nvm_ioctl_dev_init init
;
1050 if (!capable(CAP_SYS_ADMIN
))
1053 if (copy_from_user(&init
, arg
, sizeof(struct nvm_ioctl_dev_init
)))
1056 if (init
.flags
!= 0) {
1057 pr_err("nvm: no flags supported\n");
1061 init
.dev
[DISK_NAME_LEN
- 1] = '\0';
1063 return __nvm_ioctl_dev_init(&init
);
1066 static long nvm_ioctl_dev_factory(struct file
*file
, void __user
*arg
)
1068 struct nvm_ioctl_dev_factory fact
;
1069 struct nvm_dev
*dev
;
1071 if (!capable(CAP_SYS_ADMIN
))
1074 if (copy_from_user(&fact
, arg
, sizeof(struct nvm_ioctl_dev_factory
)))
1077 fact
.dev
[DISK_NAME_LEN
- 1] = '\0';
1079 if (fact
.flags
& ~(NVM_FACTORY_NR_BITS
- 1))
1082 down_write(&nvm_lock
);
1083 dev
= nvm_find_nvm_dev(fact
.dev
);
1084 up_write(&nvm_lock
);
1086 pr_err("nvm: device not found\n");
1092 if (dev
->identity
.cap
& NVM_ID_DCAP_BBLKMGMT
)
1093 return nvm_dev_factory(dev
, fact
.flags
);
1098 static long nvm_ctl_ioctl(struct file
*file
, uint cmd
, unsigned long arg
)
1100 void __user
*argp
= (void __user
*)arg
;
1104 return nvm_ioctl_info(file
, argp
);
1105 case NVM_GET_DEVICES
:
1106 return nvm_ioctl_get_devices(file
, argp
);
1107 case NVM_DEV_CREATE
:
1108 return nvm_ioctl_dev_create(file
, argp
);
1109 case NVM_DEV_REMOVE
:
1110 return nvm_ioctl_dev_remove(file
, argp
);
1112 return nvm_ioctl_dev_init(file
, argp
);
1113 case NVM_DEV_FACTORY
:
1114 return nvm_ioctl_dev_factory(file
, argp
);
1119 static const struct file_operations _ctl_fops
= {
1120 .open
= nonseekable_open
,
1121 .unlocked_ioctl
= nvm_ctl_ioctl
,
1122 .owner
= THIS_MODULE
,
1123 .llseek
= noop_llseek
,
1126 static struct miscdevice _nvm_misc
= {
1127 .minor
= MISC_DYNAMIC_MINOR
,
1129 .nodename
= "lightnvm/control",
1132 module_misc_device(_nvm_misc
);
1134 MODULE_ALIAS_MISCDEV(MISC_DYNAMIC_MINOR
);
1136 MODULE_AUTHOR("Matias Bjorling <m@bjorling.me>");
1137 MODULE_LICENSE("GPL v2");
1138 MODULE_VERSION("0.1");