blob: 4cadbe0cd537653aea39c11ed9208db0850d0f93 [file] [log] [blame]
Matias Bjørlingcd9e9802015-10-28 19:54:55 +01001/*
2 * Copyright (C) 2015 IT University of Copenhagen. All rights reserved.
3 * Initial release: Matias Bjorling <m@bjorling.me>
4 *
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.
8 *
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.
13 *
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,
17 * USA.
18 *
19 */
20
21#include <linux/blkdev.h>
22#include <linux/blk-mq.h>
23#include <linux/list.h>
24#include <linux/types.h>
25#include <linux/sem.h>
26#include <linux/bitmap.h>
27#include <linux/module.h>
28#include <linux/miscdevice.h>
29#include <linux/lightnvm.h>
Matias Bjørling912761622016-01-12 07:49:21 +010030#include <linux/sched/sysctl.h>
Matias Bjørlingcd9e9802015-10-28 19:54:55 +010031#include <uapi/linux/lightnvm.h>
32
33static LIST_HEAD(nvm_targets);
34static LIST_HEAD(nvm_mgrs);
35static LIST_HEAD(nvm_devices);
36static DECLARE_RWSEM(nvm_lock);
37
38static struct nvm_tgt_type *nvm_find_target_type(const char *name)
39{
40 struct nvm_tgt_type *tt;
41
42 list_for_each_entry(tt, &nvm_targets, list)
43 if (!strcmp(name, tt->name))
44 return tt;
45
46 return NULL;
47}
48
49int nvm_register_target(struct nvm_tgt_type *tt)
50{
51 int ret = 0;
52
53 down_write(&nvm_lock);
54 if (nvm_find_target_type(tt->name))
55 ret = -EEXIST;
56 else
57 list_add(&tt->list, &nvm_targets);
58 up_write(&nvm_lock);
59
60 return ret;
61}
62EXPORT_SYMBOL(nvm_register_target);
63
64void nvm_unregister_target(struct nvm_tgt_type *tt)
65{
66 if (!tt)
67 return;
68
69 down_write(&nvm_lock);
70 list_del(&tt->list);
71 up_write(&nvm_lock);
72}
73EXPORT_SYMBOL(nvm_unregister_target);
74
75void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags,
76 dma_addr_t *dma_handler)
77{
Matias Bjørling16f26c32015-12-06 11:25:48 +010078 return dev->ops->dev_dma_alloc(dev, dev->ppalist_pool, mem_flags,
Matias Bjørlingcd9e9802015-10-28 19:54:55 +010079 dma_handler);
80}
81EXPORT_SYMBOL(nvm_dev_dma_alloc);
82
83void nvm_dev_dma_free(struct nvm_dev *dev, void *ppa_list,
84 dma_addr_t dma_handler)
85{
86 dev->ops->dev_dma_free(dev->ppalist_pool, ppa_list, dma_handler);
87}
88EXPORT_SYMBOL(nvm_dev_dma_free);
89
90static struct nvmm_type *nvm_find_mgr_type(const char *name)
91{
92 struct nvmm_type *mt;
93
94 list_for_each_entry(mt, &nvm_mgrs, list)
95 if (!strcmp(name, mt->name))
96 return mt;
97
98 return NULL;
99}
100
Matias Bjørling762796b2015-12-06 11:25:49 +0100101struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev)
102{
103 struct nvmm_type *mt;
104 int ret;
105
106 lockdep_assert_held(&nvm_lock);
107
108 list_for_each_entry(mt, &nvm_mgrs, list) {
Matias Bjørlingb7692072016-01-12 07:49:38 +0100109 if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN))
110 continue;
111
Matias Bjørling762796b2015-12-06 11:25:49 +0100112 ret = mt->register_mgr(dev);
113 if (ret < 0) {
114 pr_err("nvm: media mgr failed to init (%d) on dev %s\n",
115 ret, dev->name);
116 return NULL; /* initialization failed */
117 } else if (ret > 0)
118 return mt;
119 }
120
121 return NULL;
122}
123
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100124int nvm_register_mgr(struct nvmm_type *mt)
125{
Matias Bjørling762796b2015-12-06 11:25:49 +0100126 struct nvm_dev *dev;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100127 int ret = 0;
128
129 down_write(&nvm_lock);
Matias Bjørling762796b2015-12-06 11:25:49 +0100130 if (nvm_find_mgr_type(mt->name)) {
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100131 ret = -EEXIST;
Matias Bjørling762796b2015-12-06 11:25:49 +0100132 goto finish;
133 } else {
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100134 list_add(&mt->list, &nvm_mgrs);
Matias Bjørling762796b2015-12-06 11:25:49 +0100135 }
136
137 /* try to register media mgr if any device have none configured */
138 list_for_each_entry(dev, &nvm_devices, devices) {
139 if (dev->mt)
140 continue;
141
142 dev->mt = nvm_init_mgr(dev);
143 }
144finish:
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100145 up_write(&nvm_lock);
146
147 return ret;
148}
149EXPORT_SYMBOL(nvm_register_mgr);
150
151void nvm_unregister_mgr(struct nvmm_type *mt)
152{
153 if (!mt)
154 return;
155
156 down_write(&nvm_lock);
157 list_del(&mt->list);
158 up_write(&nvm_lock);
159}
160EXPORT_SYMBOL(nvm_unregister_mgr);
161
162static struct nvm_dev *nvm_find_nvm_dev(const char *name)
163{
164 struct nvm_dev *dev;
165
166 list_for_each_entry(dev, &nvm_devices, devices)
167 if (!strcmp(name, dev->name))
168 return dev;
169
170 return NULL;
171}
172
Javier Gonzálezff0e4982016-01-12 07:49:33 +0100173struct nvm_block *nvm_get_blk_unlocked(struct nvm_dev *dev, struct nvm_lun *lun,
174 unsigned long flags)
175{
176 return dev->mt->get_blk_unlocked(dev, lun, flags);
177}
178EXPORT_SYMBOL(nvm_get_blk_unlocked);
179
180/* Assumes that all valid pages have already been moved on release to bm */
181void nvm_put_blk_unlocked(struct nvm_dev *dev, struct nvm_block *blk)
182{
183 return dev->mt->put_blk_unlocked(dev, blk);
184}
185EXPORT_SYMBOL(nvm_put_blk_unlocked);
186
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100187struct nvm_block *nvm_get_blk(struct nvm_dev *dev, struct nvm_lun *lun,
188 unsigned long flags)
189{
190 return dev->mt->get_blk(dev, lun, flags);
191}
192EXPORT_SYMBOL(nvm_get_blk);
193
194/* Assumes that all valid pages have already been moved on release to bm */
195void nvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
196{
197 return dev->mt->put_blk(dev, blk);
198}
199EXPORT_SYMBOL(nvm_put_blk);
200
201int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
202{
203 return dev->mt->submit_io(dev, rqd);
204}
205EXPORT_SYMBOL(nvm_submit_io);
206
207int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk)
208{
209 return dev->mt->erase_blk(dev, blk, 0);
210}
211EXPORT_SYMBOL(nvm_erase_blk);
212
Matias Bjørling069368e2016-01-12 07:49:19 +0100213void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
214{
215 int i;
216
217 if (rqd->nr_pages > 1) {
218 for (i = 0; i < rqd->nr_pages; i++)
219 rqd->ppa_list[i] = dev_to_generic_addr(dev,
220 rqd->ppa_list[i]);
221 } else {
222 rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
223 }
224}
225EXPORT_SYMBOL(nvm_addr_to_generic_mode);
226
227void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
228{
229 int i;
230
231 if (rqd->nr_pages > 1) {
232 for (i = 0; i < rqd->nr_pages; i++)
233 rqd->ppa_list[i] = generic_to_dev_addr(dev,
234 rqd->ppa_list[i]);
235 } else {
236 rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
237 }
238}
239EXPORT_SYMBOL(nvm_generic_to_addr_mode);
240
Matias Bjørlingabd805e2016-01-12 07:49:20 +0100241int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
242 struct ppa_addr *ppas, int nr_ppas)
243{
244 int i, plane_cnt, pl_idx;
245
246 if (dev->plane_mode == NVM_PLANE_SINGLE && nr_ppas == 1) {
247 rqd->nr_pages = 1;
248 rqd->ppa_addr = ppas[0];
249
250 return 0;
251 }
252
Matias Bjørlingd5bdec82016-02-19 13:56:58 +0100253 plane_cnt = dev->plane_mode;
Matias Bjørlingabd805e2016-01-12 07:49:20 +0100254 rqd->nr_pages = plane_cnt * nr_ppas;
255
256 if (dev->ops->max_phys_sect < rqd->nr_pages)
257 return -EINVAL;
258
259 rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list);
260 if (!rqd->ppa_list) {
261 pr_err("nvm: failed to allocate dma memory\n");
262 return -ENOMEM;
263 }
264
Matias Bjørling556755e2016-01-12 07:49:26 +0100265 for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
266 for (i = 0; i < nr_ppas; i++) {
Matias Bjørlingabd805e2016-01-12 07:49:20 +0100267 ppas[i].g.pl = pl_idx;
Matias Bjørling556755e2016-01-12 07:49:26 +0100268 rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppas[i];
Matias Bjørlingabd805e2016-01-12 07:49:20 +0100269 }
270 }
271
272 return 0;
273}
274EXPORT_SYMBOL(nvm_set_rqd_ppalist);
275
276void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd)
277{
278 if (!rqd->ppa_list)
279 return;
280
281 nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list);
282}
283EXPORT_SYMBOL(nvm_free_rqd_ppalist);
284
Matias Bjørling81e681d2016-01-12 07:49:28 +0100285int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas)
Matias Bjørling069368e2016-01-12 07:49:19 +0100286{
Matias Bjørling069368e2016-01-12 07:49:19 +0100287 struct nvm_rq rqd;
Matias Bjørlingabd805e2016-01-12 07:49:20 +0100288 int ret;
Matias Bjørling069368e2016-01-12 07:49:19 +0100289
290 if (!dev->ops->erase_block)
291 return 0;
292
Matias Bjørlingabd805e2016-01-12 07:49:20 +0100293 memset(&rqd, 0, sizeof(struct nvm_rq));
Matias Bjørling069368e2016-01-12 07:49:19 +0100294
Matias Bjørling81e681d2016-01-12 07:49:28 +0100295 ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas);
Matias Bjørlingabd805e2016-01-12 07:49:20 +0100296 if (ret)
297 return ret;
Matias Bjørling069368e2016-01-12 07:49:19 +0100298
299 nvm_generic_to_addr_mode(dev, &rqd);
300
301 ret = dev->ops->erase_block(dev, &rqd);
302
Matias Bjørlingabd805e2016-01-12 07:49:20 +0100303 nvm_free_rqd_ppalist(dev, &rqd);
Matias Bjørling069368e2016-01-12 07:49:19 +0100304
305 return ret;
306}
307EXPORT_SYMBOL(nvm_erase_ppa);
308
Matias Bjørling912761622016-01-12 07:49:21 +0100309void nvm_end_io(struct nvm_rq *rqd, int error)
310{
Matias Bjørling72d256e2016-01-12 07:49:29 +0100311 rqd->error = error;
312 rqd->end_io(rqd);
Matias Bjørling912761622016-01-12 07:49:21 +0100313}
314EXPORT_SYMBOL(nvm_end_io);
315
Matias Bjørling09719b62016-01-12 07:49:30 +0100316static void nvm_end_io_sync(struct nvm_rq *rqd)
Matias Bjørling912761622016-01-12 07:49:21 +0100317{
318 struct completion *waiting = rqd->wait;
319
320 rqd->wait = NULL;
321
322 complete(waiting);
323}
324
Matias Bjørling1145e632016-05-06 20:02:56 +0200325int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode,
326 int flags, void *buf, int len)
Matias Bjørling09719b62016-01-12 07:49:30 +0100327{
328 DECLARE_COMPLETION_ONSTACK(wait);
Matias Bjørling09719b62016-01-12 07:49:30 +0100329 struct bio *bio;
330 int ret;
331 unsigned long hang_check;
332
333 bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL);
334 if (IS_ERR_OR_NULL(bio))
335 return -ENOMEM;
336
Matias Bjørling1145e632016-05-06 20:02:56 +0200337 nvm_generic_to_addr_mode(dev, rqd);
Matias Bjørling09719b62016-01-12 07:49:30 +0100338
Matias Bjørling1145e632016-05-06 20:02:56 +0200339 rqd->dev = dev;
340 rqd->opcode = opcode;
341 rqd->flags = flags;
342 rqd->bio = bio;
343 rqd->wait = &wait;
344 rqd->end_io = nvm_end_io_sync;
Matias Bjørling09719b62016-01-12 07:49:30 +0100345
Matias Bjørling1145e632016-05-06 20:02:56 +0200346 ret = dev->ops->submit_io(dev, rqd);
Matias Bjørlingecfb40c2016-05-06 20:02:55 +0200347 if (ret) {
Matias Bjørlingecfb40c2016-05-06 20:02:55 +0200348 bio_put(bio);
349 return ret;
350 }
Matias Bjørling09719b62016-01-12 07:49:30 +0100351
352 /* Prevent hang_check timer from firing at us during very long I/O */
353 hang_check = sysctl_hung_task_timeout_secs;
354 if (hang_check)
355 while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2)));
356 else
357 wait_for_completion_io(&wait);
358
Matias Bjørling1145e632016-05-06 20:02:56 +0200359 return rqd->error;
360}
361
362/**
363 * nvm_submit_ppa_list - submit user-defined ppa list to device. The user must
364 * take to free ppa list if necessary.
365 * @dev: device
366 * @ppa_list: user created ppa_list
367 * @nr_ppas: length of ppa_list
368 * @opcode: device opcode
369 * @flags: device flags
370 * @buf: data buffer
371 * @len: data buffer length
372 */
373int nvm_submit_ppa_list(struct nvm_dev *dev, struct ppa_addr *ppa_list,
374 int nr_ppas, int opcode, int flags, void *buf, int len)
375{
376 struct nvm_rq rqd;
377
378 if (dev->ops->max_phys_sect < nr_ppas)
379 return -EINVAL;
380
381 memset(&rqd, 0, sizeof(struct nvm_rq));
382
383 rqd.nr_pages = nr_ppas;
384 if (nr_ppas > 1)
385 rqd.ppa_list = ppa_list;
386 else
387 rqd.ppa_addr = ppa_list[0];
388
389 return __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len);
390}
391EXPORT_SYMBOL(nvm_submit_ppa_list);
392
393/**
394 * nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded
395 * as single, dual, quad plane PPAs depending on device type.
396 * @dev: device
397 * @ppa: user created ppa_list
398 * @nr_ppas: length of ppa_list
399 * @opcode: device opcode
400 * @flags: device flags
401 * @buf: data buffer
402 * @len: data buffer length
403 */
404int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
405 int opcode, int flags, void *buf, int len)
406{
407 struct nvm_rq rqd;
408 int ret;
409
410 memset(&rqd, 0, sizeof(struct nvm_rq));
411 ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas);
412 if (ret)
413 return ret;
414
415 ret = __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len);
416
Matias Bjørling09719b62016-01-12 07:49:30 +0100417 nvm_free_rqd_ppalist(dev, &rqd);
418
Matias Bjørling1145e632016-05-06 20:02:56 +0200419 return ret;
Matias Bjørling09719b62016-01-12 07:49:30 +0100420}
421EXPORT_SYMBOL(nvm_submit_ppa);
422
Matias Bjørling22e8c972016-05-06 20:02:58 +0200423/*
424 * folds a bad block list from its plane representation to its virtual
425 * block representation. The fold is done in place and reduced size is
426 * returned.
427 *
428 * If any of the planes status are bad or grown bad block, the virtual block
429 * is marked bad. If not bad, the first plane state acts as the block state.
430 */
431int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
432{
433 int blk, offset, pl, blktype;
434
435 if (nr_blks != dev->blks_per_lun * dev->plane_mode)
436 return -EINVAL;
437
438 for (blk = 0; blk < dev->blks_per_lun; blk++) {
439 offset = blk * dev->plane_mode;
440 blktype = blks[offset];
441
442 /* Bad blocks on any planes take precedence over other types */
443 for (pl = 0; pl < dev->plane_mode; pl++) {
444 if (blks[offset + pl] &
445 (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
446 blktype = blks[offset + pl];
447 break;
448 }
449 }
450
451 blks[blk] = blktype;
452 }
453
454 return dev->blks_per_lun;
455}
456EXPORT_SYMBOL(nvm_bb_tbl_fold);
457
Matias Bjørlingca5927e2016-01-12 07:49:35 +0100458static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp)
459{
460 int i;
461
462 dev->lps_per_blk = dev->pgs_per_blk;
463 dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL);
464 if (!dev->lptbl)
465 return -ENOMEM;
466
467 /* Just a linear array */
468 for (i = 0; i < dev->lps_per_blk; i++)
469 dev->lptbl[i] = i;
470
471 return 0;
472}
473
474static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp)
475{
476 int i, p;
477 struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc;
478
479 if (!mlc->num_pairs)
480 return 0;
481
482 dev->lps_per_blk = mlc->num_pairs;
483 dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL);
484 if (!dev->lptbl)
485 return -ENOMEM;
486
487 /* The lower page table encoding consists of a list of bytes, where each
488 * has a lower and an upper half. The first half byte maintains the
489 * increment value and every value after is an offset added to the
490 * previous incrementation value */
491 dev->lptbl[0] = mlc->pairs[0] & 0xF;
492 for (i = 1; i < dev->lps_per_blk; i++) {
493 p = mlc->pairs[i >> 1];
494 if (i & 0x1) /* upper */
495 dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4);
496 else /* lower */
497 dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF);
498 }
499
500 return 0;
501}
502
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100503static int nvm_core_init(struct nvm_dev *dev)
504{
505 struct nvm_id *id = &dev->identity;
506 struct nvm_id_group *grp = &id->groups[0];
507
508 /* device values */
509 dev->nr_chnls = grp->num_ch;
510 dev->luns_per_chnl = grp->num_lun;
511 dev->pgs_per_blk = grp->num_pg;
512 dev->blks_per_lun = grp->num_blk;
513 dev->nr_planes = grp->num_pln;
Matias Bjørling4891d122016-05-06 20:02:57 +0200514 dev->fpg_size = grp->fpg_sz;
515 dev->pfpg_size = grp->fpg_sz * grp->num_pln;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100516 dev->sec_size = grp->csecs;
517 dev->oob_size = grp->sos;
518 dev->sec_per_pg = grp->fpg_sz / grp->csecs;
Matias Bjørlingf9a99952016-01-12 07:49:34 +0100519 dev->mccap = grp->mccap;
Matias Bjørling7386af22015-11-16 15:34:44 +0100520 memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100521
522 dev->plane_mode = NVM_PLANE_SINGLE;
523 dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size;
524
Matias Bjørling4264c982015-11-16 15:34:41 +0100525 if (grp->mtype != 0) {
526 pr_err("nvm: memory type not supported\n");
527 return -EINVAL;
528 }
529
Matias Bjørlingca5927e2016-01-12 07:49:35 +0100530 switch (grp->fmtype) {
531 case NVM_ID_FMTYPE_SLC:
532 if (nvm_init_slc_tbl(dev, grp))
533 return -ENOMEM;
534 break;
535 case NVM_ID_FMTYPE_MLC:
536 if (nvm_init_mlc_tbl(dev, grp))
537 return -ENOMEM;
538 break;
539 default:
Matias Bjørling4264c982015-11-16 15:34:41 +0100540 pr_err("nvm: flash type not supported\n");
541 return -EINVAL;
542 }
543
Matias Bjørlingca5927e2016-01-12 07:49:35 +0100544 if (!dev->lps_per_blk)
545 pr_info("nvm: lower page programming table missing\n");
546
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100547 if (grp->mpos & 0x020202)
548 dev->plane_mode = NVM_PLANE_DOUBLE;
549 if (grp->mpos & 0x040404)
550 dev->plane_mode = NVM_PLANE_QUAD;
551
552 /* calculated values */
553 dev->sec_per_pl = dev->sec_per_pg * dev->nr_planes;
554 dev->sec_per_blk = dev->sec_per_pl * dev->pgs_per_blk;
555 dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun;
556 dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls;
557
Matias Bjørlinged2a92a2016-02-20 08:52:42 +0100558 dev->total_secs = dev->nr_luns * dev->sec_per_lun;
Wenwei Taoda1e2842016-03-03 15:06:38 +0100559 dev->lun_map = kcalloc(BITS_TO_LONGS(dev->nr_luns),
560 sizeof(unsigned long), GFP_KERNEL);
561 if (!dev->lun_map)
562 return -ENOMEM;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100563 INIT_LIST_HEAD(&dev->online_targets);
Matias Bjørlinge3eb3792016-01-12 07:49:36 +0100564 mutex_init(&dev->mlock);
Wenwei Tao4c9dacb2016-03-03 15:06:37 +0100565 spin_lock_init(&dev->lock);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100566
567 return 0;
568}
569
570static void nvm_free(struct nvm_dev *dev)
571{
572 if (!dev)
573 return;
574
575 if (dev->mt)
576 dev->mt->unregister_mgr(dev);
Matias Bjørlingca5927e2016-01-12 07:49:35 +0100577
578 kfree(dev->lptbl);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100579}
580
581static int nvm_init(struct nvm_dev *dev)
582{
Wenwei Tao480fc0d2015-11-20 13:47:53 +0100583 int ret = -EINVAL;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100584
585 if (!dev->q || !dev->ops)
Wenwei Tao480fc0d2015-11-20 13:47:53 +0100586 return ret;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100587
Matias Bjørling16f26c32015-12-06 11:25:48 +0100588 if (dev->ops->identity(dev, &dev->identity)) {
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100589 pr_err("nvm: device could not be identified\n");
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100590 goto err;
591 }
592
593 pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n",
594 dev->identity.ver_id, dev->identity.vmnt,
595 dev->identity.cgrps);
596
597 if (dev->identity.ver_id != 1) {
598 pr_err("nvm: device not supported by kernel.");
599 goto err;
600 }
601
602 if (dev->identity.cgrps != 1) {
603 pr_err("nvm: only one group configuration supported.");
604 goto err;
605 }
606
607 ret = nvm_core_init(dev);
608 if (ret) {
609 pr_err("nvm: could not initialize core structures.\n");
610 goto err;
611 }
612
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100613 pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n",
614 dev->name, dev->sec_per_pg, dev->nr_planes,
615 dev->pgs_per_blk, dev->blks_per_lun, dev->nr_luns,
616 dev->nr_chnls);
617 return 0;
618err:
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100619 pr_err("nvm: failed to initialize nvm\n");
620 return ret;
621}
622
623static void nvm_exit(struct nvm_dev *dev)
624{
625 if (dev->ppalist_pool)
626 dev->ops->destroy_dma_pool(dev->ppalist_pool);
627 nvm_free(dev);
628
629 pr_info("nvm: successfully unloaded\n");
630}
631
632int nvm_register(struct request_queue *q, char *disk_name,
633 struct nvm_dev_ops *ops)
634{
635 struct nvm_dev *dev;
636 int ret;
637
638 if (!ops->identity)
639 return -EINVAL;
640
641 dev = kzalloc(sizeof(struct nvm_dev), GFP_KERNEL);
642 if (!dev)
643 return -ENOMEM;
644
645 dev->q = q;
646 dev->ops = ops;
647 strncpy(dev->name, disk_name, DISK_NAME_LEN);
648
649 ret = nvm_init(dev);
650 if (ret)
651 goto err_init;
652
Wenwei Taod1601472015-11-28 16:49:25 +0100653 if (dev->ops->max_phys_sect > 256) {
654 pr_info("nvm: max sectors supported is 256.\n");
655 ret = -EINVAL;
656 goto err_init;
657 }
658
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100659 if (dev->ops->max_phys_sect > 1) {
Matias Bjørling16f26c32015-12-06 11:25:48 +0100660 dev->ppalist_pool = dev->ops->create_dma_pool(dev, "ppalist");
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100661 if (!dev->ppalist_pool) {
662 pr_err("nvm: could not create ppa pool\n");
Matias Bjørling93e70c12015-11-20 13:47:54 +0100663 ret = -ENOMEM;
664 goto err_init;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100665 }
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100666 }
667
Matias Bjørlingbf643182016-02-04 15:13:27 +0100668 if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
669 ret = nvm_get_sysblock(dev, &dev->sb);
670 if (!ret)
671 pr_err("nvm: device not initialized.\n");
672 else if (ret < 0)
673 pr_err("nvm: err (%d) on device initialization\n", ret);
674 }
Matias Bjørlingb7692072016-01-12 07:49:38 +0100675
Matias Bjørling762796b2015-12-06 11:25:49 +0100676 /* register device with a supported media manager */
Matias Bjørlingedad2e62015-11-16 15:34:42 +0100677 down_write(&nvm_lock);
Matias Bjørlingb7692072016-01-12 07:49:38 +0100678 if (ret > 0)
679 dev->mt = nvm_init_mgr(dev);
Matias Bjørlingedad2e62015-11-16 15:34:42 +0100680 list_add(&dev->devices, &nvm_devices);
681 up_write(&nvm_lock);
682
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100683 return 0;
684err_init:
Wenwei Taoda1e2842016-03-03 15:06:38 +0100685 kfree(dev->lun_map);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100686 kfree(dev);
687 return ret;
688}
689EXPORT_SYMBOL(nvm_register);
690
691void nvm_unregister(char *disk_name)
692{
Wenwei Taod0a712c2015-11-28 16:49:28 +0100693 struct nvm_dev *dev;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100694
Wenwei Taod0a712c2015-11-28 16:49:28 +0100695 down_write(&nvm_lock);
696 dev = nvm_find_nvm_dev(disk_name);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100697 if (!dev) {
698 pr_err("nvm: could not find device %s to unregister\n",
699 disk_name);
Wenwei Taod0a712c2015-11-28 16:49:28 +0100700 up_write(&nvm_lock);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100701 return;
702 }
703
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100704 list_del(&dev->devices);
705 up_write(&nvm_lock);
Matias Bjørlingc1480ad2015-11-16 15:34:43 +0100706
707 nvm_exit(dev);
Wenwei Taoda1e2842016-03-03 15:06:38 +0100708 kfree(dev->lun_map);
Matias Bjørlingc1480ad2015-11-16 15:34:43 +0100709 kfree(dev);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100710}
711EXPORT_SYMBOL(nvm_unregister);
712
713static const struct block_device_operations nvm_fops = {
714 .owner = THIS_MODULE,
715};
716
717static int nvm_create_target(struct nvm_dev *dev,
718 struct nvm_ioctl_create *create)
719{
720 struct nvm_ioctl_create_simple *s = &create->conf.s;
721 struct request_queue *tqueue;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100722 struct gendisk *tdisk;
723 struct nvm_tgt_type *tt;
724 struct nvm_target *t;
725 void *targetdata;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100726
727 if (!dev->mt) {
Matias Bjørling762796b2015-12-06 11:25:49 +0100728 pr_info("nvm: device has no media manager registered.\n");
729 return -ENODEV;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100730 }
731
Matias Bjørling762796b2015-12-06 11:25:49 +0100732 down_write(&nvm_lock);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100733 tt = nvm_find_target_type(create->tgttype);
734 if (!tt) {
735 pr_err("nvm: target type %s not found\n", create->tgttype);
Wenwei Taod0a712c2015-11-28 16:49:28 +0100736 up_write(&nvm_lock);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100737 return -EINVAL;
738 }
739
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100740 list_for_each_entry(t, &dev->online_targets, list) {
741 if (!strcmp(create->tgtname, t->disk->disk_name)) {
742 pr_err("nvm: target name already exists.\n");
743 up_write(&nvm_lock);
744 return -EINVAL;
745 }
746 }
747 up_write(&nvm_lock);
748
749 t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
750 if (!t)
751 return -ENOMEM;
752
753 tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
754 if (!tqueue)
755 goto err_t;
756 blk_queue_make_request(tqueue, tt->make_rq);
757
758 tdisk = alloc_disk(0);
759 if (!tdisk)
760 goto err_queue;
761
762 sprintf(tdisk->disk_name, "%s", create->tgtname);
763 tdisk->flags = GENHD_FL_EXT_DEVT;
764 tdisk->major = 0;
765 tdisk->first_minor = 0;
766 tdisk->fops = &nvm_fops;
767 tdisk->queue = tqueue;
768
769 targetdata = tt->init(dev, tdisk, s->lun_begin, s->lun_end);
770 if (IS_ERR(targetdata))
771 goto err_init;
772
773 tdisk->private_data = targetdata;
774 tqueue->queuedata = targetdata;
775
776 blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect);
777
778 set_capacity(tdisk, tt->capacity(targetdata));
779 add_disk(tdisk);
780
781 t->type = tt;
782 t->disk = tdisk;
783
784 down_write(&nvm_lock);
785 list_add_tail(&t->list, &dev->online_targets);
786 up_write(&nvm_lock);
787
788 return 0;
789err_init:
790 put_disk(tdisk);
791err_queue:
792 blk_cleanup_queue(tqueue);
793err_t:
794 kfree(t);
795 return -ENOMEM;
796}
797
798static void nvm_remove_target(struct nvm_target *t)
799{
800 struct nvm_tgt_type *tt = t->type;
801 struct gendisk *tdisk = t->disk;
802 struct request_queue *q = tdisk->queue;
803
804 lockdep_assert_held(&nvm_lock);
805
806 del_gendisk(tdisk);
Javier Gonzálezd09f9582015-11-16 15:34:47 +0100807 blk_cleanup_queue(q);
808
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100809 if (tt->exit)
810 tt->exit(tdisk->private_data);
811
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100812 put_disk(tdisk);
813
814 list_del(&t->list);
815 kfree(t);
816}
817
818static int __nvm_configure_create(struct nvm_ioctl_create *create)
819{
820 struct nvm_dev *dev;
821 struct nvm_ioctl_create_simple *s;
822
Wenwei Taod0a712c2015-11-28 16:49:28 +0100823 down_write(&nvm_lock);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100824 dev = nvm_find_nvm_dev(create->dev);
Wenwei Taod0a712c2015-11-28 16:49:28 +0100825 up_write(&nvm_lock);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100826 if (!dev) {
827 pr_err("nvm: device not found\n");
828 return -EINVAL;
829 }
830
831 if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) {
832 pr_err("nvm: config type not valid\n");
833 return -EINVAL;
834 }
835 s = &create->conf.s;
836
837 if (s->lun_begin > s->lun_end || s->lun_end > dev->nr_luns) {
838 pr_err("nvm: lun out of bound (%u:%u > %u)\n",
839 s->lun_begin, s->lun_end, dev->nr_luns);
840 return -EINVAL;
841 }
842
843 return nvm_create_target(dev, create);
844}
845
846static int __nvm_configure_remove(struct nvm_ioctl_remove *remove)
847{
848 struct nvm_target *t = NULL;
849 struct nvm_dev *dev;
850 int ret = -1;
851
852 down_write(&nvm_lock);
853 list_for_each_entry(dev, &nvm_devices, devices)
854 list_for_each_entry(t, &dev->online_targets, list) {
855 if (!strcmp(remove->tgtname, t->disk->disk_name)) {
856 nvm_remove_target(t);
857 ret = 0;
858 break;
859 }
860 }
861 up_write(&nvm_lock);
862
863 if (ret) {
864 pr_err("nvm: target \"%s\" doesn't exist.\n", remove->tgtname);
865 return -EINVAL;
866 }
867
868 return 0;
869}
870
871#ifdef CONFIG_NVM_DEBUG
872static int nvm_configure_show(const char *val)
873{
874 struct nvm_dev *dev;
875 char opcode, devname[DISK_NAME_LEN];
876 int ret;
877
878 ret = sscanf(val, "%c %32s", &opcode, devname);
879 if (ret != 2) {
880 pr_err("nvm: invalid command. Use \"opcode devicename\".\n");
881 return -EINVAL;
882 }
883
Wenwei Taod0a712c2015-11-28 16:49:28 +0100884 down_write(&nvm_lock);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100885 dev = nvm_find_nvm_dev(devname);
Wenwei Taod0a712c2015-11-28 16:49:28 +0100886 up_write(&nvm_lock);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100887 if (!dev) {
888 pr_err("nvm: device not found\n");
889 return -EINVAL;
890 }
891
892 if (!dev->mt)
893 return 0;
894
Javier Gonzalez2fde0e42015-11-20 13:47:57 +0100895 dev->mt->lun_info_print(dev);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100896
897 return 0;
898}
899
900static int nvm_configure_remove(const char *val)
901{
902 struct nvm_ioctl_remove remove;
903 char opcode;
904 int ret;
905
906 ret = sscanf(val, "%c %256s", &opcode, remove.tgtname);
907 if (ret != 2) {
908 pr_err("nvm: invalid command. Use \"d targetname\".\n");
909 return -EINVAL;
910 }
911
912 remove.flags = 0;
913
914 return __nvm_configure_remove(&remove);
915}
916
917static int nvm_configure_create(const char *val)
918{
919 struct nvm_ioctl_create create;
920 char opcode;
921 int lun_begin, lun_end, ret;
922
923 ret = sscanf(val, "%c %256s %256s %48s %u:%u", &opcode, create.dev,
924 create.tgtname, create.tgttype,
925 &lun_begin, &lun_end);
926 if (ret != 6) {
927 pr_err("nvm: invalid command. Use \"opcode device name tgttype lun_begin:lun_end\".\n");
928 return -EINVAL;
929 }
930
931 create.flags = 0;
932 create.conf.type = NVM_CONFIG_TYPE_SIMPLE;
933 create.conf.s.lun_begin = lun_begin;
934 create.conf.s.lun_end = lun_end;
935
936 return __nvm_configure_create(&create);
937}
938
939
940/* Exposes administrative interface through /sys/module/lnvm/configure_by_str */
941static int nvm_configure_by_str_event(const char *val,
942 const struct kernel_param *kp)
943{
944 char opcode;
945 int ret;
946
947 ret = sscanf(val, "%c", &opcode);
948 if (ret != 1) {
949 pr_err("nvm: string must have the format of \"cmd ...\"\n");
950 return -EINVAL;
951 }
952
953 switch (opcode) {
954 case 'a':
955 return nvm_configure_create(val);
956 case 'd':
957 return nvm_configure_remove(val);
958 case 's':
959 return nvm_configure_show(val);
960 default:
961 pr_err("nvm: invalid command\n");
962 return -EINVAL;
963 }
964
965 return 0;
966}
967
968static int nvm_configure_get(char *buf, const struct kernel_param *kp)
969{
Alan5e422cf2016-02-19 13:56:57 +0100970 int sz;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100971 struct nvm_dev *dev;
972
Alan5e422cf2016-02-19 13:56:57 +0100973 sz = sprintf(buf, "available devices:\n");
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100974 down_write(&nvm_lock);
975 list_for_each_entry(dev, &nvm_devices, devices) {
Alan5e422cf2016-02-19 13:56:57 +0100976 if (sz > 4095 - DISK_NAME_LEN - 2)
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100977 break;
Alan5e422cf2016-02-19 13:56:57 +0100978 sz += sprintf(buf + sz, " %32s\n", dev->name);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100979 }
980 up_write(&nvm_lock);
981
Alan5e422cf2016-02-19 13:56:57 +0100982 return sz;
Matias Bjørlingcd9e9802015-10-28 19:54:55 +0100983}
984
985static const struct kernel_param_ops nvm_configure_by_str_event_param_ops = {
986 .set = nvm_configure_by_str_event,
987 .get = nvm_configure_get,
988};
989
990#undef MODULE_PARAM_PREFIX
991#define MODULE_PARAM_PREFIX "lnvm."
992
993module_param_cb(configure_debug, &nvm_configure_by_str_event_param_ops, NULL,
994 0644);
995
996#endif /* CONFIG_NVM_DEBUG */
997
998static long nvm_ioctl_info(struct file *file, void __user *arg)
999{
1000 struct nvm_ioctl_info *info;
1001 struct nvm_tgt_type *tt;
1002 int tgt_iter = 0;
1003
1004 if (!capable(CAP_SYS_ADMIN))
1005 return -EPERM;
1006
1007 info = memdup_user(arg, sizeof(struct nvm_ioctl_info));
1008 if (IS_ERR(info))
1009 return -EFAULT;
1010
1011 info->version[0] = NVM_VERSION_MAJOR;
1012 info->version[1] = NVM_VERSION_MINOR;
1013 info->version[2] = NVM_VERSION_PATCH;
1014
1015 down_write(&nvm_lock);
1016 list_for_each_entry(tt, &nvm_targets, list) {
1017 struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter];
1018
1019 tgt->version[0] = tt->version[0];
1020 tgt->version[1] = tt->version[1];
1021 tgt->version[2] = tt->version[2];
1022 strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX);
1023
1024 tgt_iter++;
1025 }
1026
1027 info->tgtsize = tgt_iter;
1028 up_write(&nvm_lock);
1029
Sudip Mukherjee76e25082015-11-28 16:49:24 +01001030 if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) {
1031 kfree(info);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +01001032 return -EFAULT;
Sudip Mukherjee76e25082015-11-28 16:49:24 +01001033 }
Matias Bjørlingcd9e9802015-10-28 19:54:55 +01001034
1035 kfree(info);
1036 return 0;
1037}
1038
1039static long nvm_ioctl_get_devices(struct file *file, void __user *arg)
1040{
1041 struct nvm_ioctl_get_devices *devices;
1042 struct nvm_dev *dev;
1043 int i = 0;
1044
1045 if (!capable(CAP_SYS_ADMIN))
1046 return -EPERM;
1047
1048 devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL);
1049 if (!devices)
1050 return -ENOMEM;
1051
1052 down_write(&nvm_lock);
1053 list_for_each_entry(dev, &nvm_devices, devices) {
1054 struct nvm_ioctl_device_info *info = &devices->info[i];
1055
1056 sprintf(info->devname, "%s", dev->name);
1057 if (dev->mt) {
1058 info->bmversion[0] = dev->mt->version[0];
1059 info->bmversion[1] = dev->mt->version[1];
1060 info->bmversion[2] = dev->mt->version[2];
1061 sprintf(info->bmname, "%s", dev->mt->name);
1062 } else {
1063 sprintf(info->bmname, "none");
1064 }
1065
1066 i++;
1067 if (i > 31) {
1068 pr_err("nvm: max 31 devices can be reported.\n");
1069 break;
1070 }
1071 }
1072 up_write(&nvm_lock);
1073
1074 devices->nr_devices = i;
1075
Sudip Mukherjee76e25082015-11-28 16:49:24 +01001076 if (copy_to_user(arg, devices,
1077 sizeof(struct nvm_ioctl_get_devices))) {
1078 kfree(devices);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +01001079 return -EFAULT;
Sudip Mukherjee76e25082015-11-28 16:49:24 +01001080 }
Matias Bjørlingcd9e9802015-10-28 19:54:55 +01001081
1082 kfree(devices);
1083 return 0;
1084}
1085
1086static long nvm_ioctl_dev_create(struct file *file, void __user *arg)
1087{
1088 struct nvm_ioctl_create create;
1089
1090 if (!capable(CAP_SYS_ADMIN))
1091 return -EPERM;
1092
1093 if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create)))
1094 return -EFAULT;
1095
1096 create.dev[DISK_NAME_LEN - 1] = '\0';
1097 create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0';
1098 create.tgtname[DISK_NAME_LEN - 1] = '\0';
1099
1100 if (create.flags != 0) {
1101 pr_err("nvm: no flags supported\n");
1102 return -EINVAL;
1103 }
1104
1105 return __nvm_configure_create(&create);
1106}
1107
1108static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
1109{
1110 struct nvm_ioctl_remove remove;
1111
1112 if (!capable(CAP_SYS_ADMIN))
1113 return -EPERM;
1114
1115 if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove)))
1116 return -EFAULT;
1117
1118 remove.tgtname[DISK_NAME_LEN - 1] = '\0';
1119
1120 if (remove.flags != 0) {
1121 pr_err("nvm: no flags supported\n");
1122 return -EINVAL;
1123 }
1124
1125 return __nvm_configure_remove(&remove);
1126}
1127
Matias Bjørling55696152016-01-12 07:49:37 +01001128static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info)
1129{
1130 info->seqnr = 1;
1131 info->erase_cnt = 0;
1132 info->version = 1;
1133}
1134
1135static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init)
1136{
1137 struct nvm_dev *dev;
1138 struct nvm_sb_info info;
Matias Bjørlingb7692072016-01-12 07:49:38 +01001139 int ret;
Matias Bjørling55696152016-01-12 07:49:37 +01001140
1141 down_write(&nvm_lock);
1142 dev = nvm_find_nvm_dev(init->dev);
1143 up_write(&nvm_lock);
1144 if (!dev) {
1145 pr_err("nvm: device not found\n");
1146 return -EINVAL;
1147 }
1148
1149 nvm_setup_nvm_sb_info(&info);
1150
1151 strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN);
1152 info.fs_ppa.ppa = -1;
1153
Matias Bjørlingbf643182016-02-04 15:13:27 +01001154 if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) {
1155 ret = nvm_init_sysblock(dev, &info);
1156 if (ret)
1157 return ret;
1158 }
Matias Bjørlingb7692072016-01-12 07:49:38 +01001159
1160 memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info));
1161
1162 down_write(&nvm_lock);
1163 dev->mt = nvm_init_mgr(dev);
1164 up_write(&nvm_lock);
1165
1166 return 0;
Matias Bjørling55696152016-01-12 07:49:37 +01001167}
1168
1169static long nvm_ioctl_dev_init(struct file *file, void __user *arg)
1170{
1171 struct nvm_ioctl_dev_init init;
1172
1173 if (!capable(CAP_SYS_ADMIN))
1174 return -EPERM;
1175
1176 if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init)))
1177 return -EFAULT;
1178
1179 if (init.flags != 0) {
1180 pr_err("nvm: no flags supported\n");
1181 return -EINVAL;
1182 }
1183
1184 init.dev[DISK_NAME_LEN - 1] = '\0';
1185
1186 return __nvm_ioctl_dev_init(&init);
1187}
1188
Matias Bjørling8b4970c2016-01-12 07:49:39 +01001189static long nvm_ioctl_dev_factory(struct file *file, void __user *arg)
1190{
1191 struct nvm_ioctl_dev_factory fact;
1192 struct nvm_dev *dev;
1193
1194 if (!capable(CAP_SYS_ADMIN))
1195 return -EPERM;
1196
1197 if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory)))
1198 return -EFAULT;
1199
1200 fact.dev[DISK_NAME_LEN - 1] = '\0';
1201
1202 if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1))
1203 return -EINVAL;
1204
1205 down_write(&nvm_lock);
1206 dev = nvm_find_nvm_dev(fact.dev);
1207 up_write(&nvm_lock);
1208 if (!dev) {
1209 pr_err("nvm: device not found\n");
1210 return -EINVAL;
1211 }
1212
1213 if (dev->mt) {
1214 dev->mt->unregister_mgr(dev);
1215 dev->mt = NULL;
1216 }
1217
Matias Bjørlingbf643182016-02-04 15:13:27 +01001218 if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT)
1219 return nvm_dev_factory(dev, fact.flags);
1220
1221 return 0;
Matias Bjørling8b4970c2016-01-12 07:49:39 +01001222}
1223
Matias Bjørlingcd9e9802015-10-28 19:54:55 +01001224static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg)
1225{
1226 void __user *argp = (void __user *)arg;
1227
1228 switch (cmd) {
1229 case NVM_INFO:
1230 return nvm_ioctl_info(file, argp);
1231 case NVM_GET_DEVICES:
1232 return nvm_ioctl_get_devices(file, argp);
1233 case NVM_DEV_CREATE:
1234 return nvm_ioctl_dev_create(file, argp);
1235 case NVM_DEV_REMOVE:
1236 return nvm_ioctl_dev_remove(file, argp);
Matias Bjørling55696152016-01-12 07:49:37 +01001237 case NVM_DEV_INIT:
1238 return nvm_ioctl_dev_init(file, argp);
Matias Bjørling8b4970c2016-01-12 07:49:39 +01001239 case NVM_DEV_FACTORY:
1240 return nvm_ioctl_dev_factory(file, argp);
Matias Bjørlingcd9e9802015-10-28 19:54:55 +01001241 }
1242 return 0;
1243}
1244
1245static const struct file_operations _ctl_fops = {
1246 .open = nonseekable_open,
1247 .unlocked_ioctl = nvm_ctl_ioctl,
1248 .owner = THIS_MODULE,
1249 .llseek = noop_llseek,
1250};
1251
1252static struct miscdevice _nvm_misc = {
1253 .minor = MISC_DYNAMIC_MINOR,
1254 .name = "lightnvm",
1255 .nodename = "lightnvm/control",
1256 .fops = &_ctl_fops,
1257};
1258
1259MODULE_ALIAS_MISCDEV(MISC_DYNAMIC_MINOR);
1260
1261static int __init nvm_mod_init(void)
1262{
1263 int ret;
1264
1265 ret = misc_register(&_nvm_misc);
1266 if (ret)
1267 pr_err("nvm: misc_register failed for control device");
1268
1269 return ret;
1270}
1271
1272static void __exit nvm_mod_exit(void)
1273{
1274 misc_deregister(&_nvm_misc);
1275}
1276
1277MODULE_AUTHOR("Matias Bjorling <m@bjorling.me>");
1278MODULE_LICENSE("GPL v2");
1279MODULE_VERSION("0.1");
1280module_init(nvm_mod_init);
1281module_exit(nvm_mod_exit);