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cd9e9808 MB |
1 | /* |
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 | ||
cd9e9808 MB |
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> | |
91276162 | 28 | #include <linux/sched/sysctl.h> |
cd9e9808 | 29 | |
6063fe39 | 30 | static LIST_HEAD(nvm_tgt_types); |
5cd90785 | 31 | static DECLARE_RWSEM(nvm_tgtt_lock); |
cd9e9808 MB |
32 | static LIST_HEAD(nvm_mgrs); |
33 | static LIST_HEAD(nvm_devices); | |
34 | static DECLARE_RWSEM(nvm_lock); | |
35 | ||
b76eb20b | 36 | struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock) |
6f8645cb | 37 | { |
b76eb20b | 38 | struct nvm_tgt_type *tmp, *tt = NULL; |
6f8645cb | 39 | |
b76eb20b | 40 | if (lock) |
5cd90785 | 41 | down_write(&nvm_tgtt_lock); |
6f8645cb | 42 | |
b76eb20b MB |
43 | list_for_each_entry(tmp, &nvm_tgt_types, list) |
44 | if (!strcmp(name, tmp->name)) { | |
45 | tt = tmp; | |
46 | break; | |
47 | } | |
cd9e9808 | 48 | |
b76eb20b | 49 | if (lock) |
5cd90785 | 50 | up_write(&nvm_tgtt_lock); |
b76eb20b | 51 | return tt; |
cd9e9808 | 52 | } |
b76eb20b | 53 | EXPORT_SYMBOL(nvm_find_target_type); |
cd9e9808 | 54 | |
6063fe39 | 55 | int nvm_register_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
56 | { |
57 | int ret = 0; | |
58 | ||
5cd90785 | 59 | down_write(&nvm_tgtt_lock); |
b76eb20b | 60 | if (nvm_find_target_type(tt->name, 0)) |
cd9e9808 MB |
61 | ret = -EEXIST; |
62 | else | |
6063fe39 | 63 | list_add(&tt->list, &nvm_tgt_types); |
5cd90785 | 64 | up_write(&nvm_tgtt_lock); |
cd9e9808 MB |
65 | |
66 | return ret; | |
67 | } | |
6063fe39 | 68 | EXPORT_SYMBOL(nvm_register_tgt_type); |
cd9e9808 | 69 | |
6063fe39 | 70 | void nvm_unregister_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
71 | { |
72 | if (!tt) | |
73 | return; | |
74 | ||
75 | down_write(&nvm_lock); | |
76 | list_del(&tt->list); | |
77 | up_write(&nvm_lock); | |
78 | } | |
6063fe39 | 79 | EXPORT_SYMBOL(nvm_unregister_tgt_type); |
cd9e9808 MB |
80 | |
81 | void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, | |
82 | dma_addr_t *dma_handler) | |
83 | { | |
75b85649 | 84 | return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags, |
cd9e9808 MB |
85 | dma_handler); |
86 | } | |
87 | EXPORT_SYMBOL(nvm_dev_dma_alloc); | |
88 | ||
75b85649 | 89 | void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, |
cd9e9808 MB |
90 | dma_addr_t dma_handler) |
91 | { | |
75b85649 | 92 | dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler); |
cd9e9808 MB |
93 | } |
94 | EXPORT_SYMBOL(nvm_dev_dma_free); | |
95 | ||
96 | static struct nvmm_type *nvm_find_mgr_type(const char *name) | |
97 | { | |
98 | struct nvmm_type *mt; | |
99 | ||
100 | list_for_each_entry(mt, &nvm_mgrs, list) | |
101 | if (!strcmp(name, mt->name)) | |
102 | return mt; | |
103 | ||
104 | return NULL; | |
105 | } | |
106 | ||
58eaaf9b | 107 | static struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev) |
762796bc MB |
108 | { |
109 | struct nvmm_type *mt; | |
110 | int ret; | |
111 | ||
112 | lockdep_assert_held(&nvm_lock); | |
113 | ||
114 | list_for_each_entry(mt, &nvm_mgrs, list) { | |
b7692076 MB |
115 | if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN)) |
116 | continue; | |
117 | ||
762796bc MB |
118 | ret = mt->register_mgr(dev); |
119 | if (ret < 0) { | |
120 | pr_err("nvm: media mgr failed to init (%d) on dev %s\n", | |
121 | ret, dev->name); | |
122 | return NULL; /* initialization failed */ | |
123 | } else if (ret > 0) | |
124 | return mt; | |
125 | } | |
126 | ||
127 | return NULL; | |
128 | } | |
129 | ||
cd9e9808 MB |
130 | int nvm_register_mgr(struct nvmm_type *mt) |
131 | { | |
762796bc | 132 | struct nvm_dev *dev; |
cd9e9808 MB |
133 | int ret = 0; |
134 | ||
135 | down_write(&nvm_lock); | |
762796bc | 136 | if (nvm_find_mgr_type(mt->name)) { |
cd9e9808 | 137 | ret = -EEXIST; |
762796bc MB |
138 | goto finish; |
139 | } else { | |
cd9e9808 | 140 | list_add(&mt->list, &nvm_mgrs); |
762796bc MB |
141 | } |
142 | ||
143 | /* try to register media mgr if any device have none configured */ | |
144 | list_for_each_entry(dev, &nvm_devices, devices) { | |
145 | if (dev->mt) | |
146 | continue; | |
147 | ||
148 | dev->mt = nvm_init_mgr(dev); | |
149 | } | |
150 | finish: | |
cd9e9808 MB |
151 | up_write(&nvm_lock); |
152 | ||
153 | return ret; | |
154 | } | |
155 | EXPORT_SYMBOL(nvm_register_mgr); | |
156 | ||
157 | void nvm_unregister_mgr(struct nvmm_type *mt) | |
158 | { | |
159 | if (!mt) | |
160 | return; | |
161 | ||
162 | down_write(&nvm_lock); | |
163 | list_del(&mt->list); | |
164 | up_write(&nvm_lock); | |
165 | } | |
166 | EXPORT_SYMBOL(nvm_unregister_mgr); | |
167 | ||
168 | static struct nvm_dev *nvm_find_nvm_dev(const char *name) | |
169 | { | |
170 | struct nvm_dev *dev; | |
171 | ||
172 | list_for_each_entry(dev, &nvm_devices, devices) | |
173 | if (!strcmp(name, dev->name)) | |
174 | return dev; | |
175 | ||
176 | return NULL; | |
177 | } | |
178 | ||
179 | struct nvm_block *nvm_get_blk(struct nvm_dev *dev, struct nvm_lun *lun, | |
180 | unsigned long flags) | |
181 | { | |
182 | return dev->mt->get_blk(dev, lun, flags); | |
183 | } | |
184 | EXPORT_SYMBOL(nvm_get_blk); | |
185 | ||
186 | /* Assumes that all valid pages have already been moved on release to bm */ | |
187 | void nvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk) | |
188 | { | |
189 | return dev->mt->put_blk(dev, blk); | |
190 | } | |
191 | EXPORT_SYMBOL(nvm_put_blk); | |
192 | ||
529435e8 JG |
193 | void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type) |
194 | { | |
195 | return dev->mt->mark_blk(dev, ppa, type); | |
196 | } | |
197 | EXPORT_SYMBOL(nvm_mark_blk); | |
198 | ||
cd9e9808 MB |
199 | int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) |
200 | { | |
201 | return dev->mt->submit_io(dev, rqd); | |
202 | } | |
203 | EXPORT_SYMBOL(nvm_submit_io); | |
204 | ||
205 | int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk) | |
206 | { | |
207 | return dev->mt->erase_blk(dev, blk, 0); | |
208 | } | |
209 | EXPORT_SYMBOL(nvm_erase_blk); | |
210 | ||
069368e9 MB |
211 | void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd) |
212 | { | |
213 | int i; | |
214 | ||
6d5be959 JG |
215 | if (rqd->nr_ppas > 1) { |
216 | for (i = 0; i < rqd->nr_ppas; i++) | |
069368e9 MB |
217 | rqd->ppa_list[i] = dev_to_generic_addr(dev, |
218 | rqd->ppa_list[i]); | |
219 | } else { | |
220 | rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr); | |
221 | } | |
222 | } | |
223 | EXPORT_SYMBOL(nvm_addr_to_generic_mode); | |
224 | ||
225 | void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd) | |
226 | { | |
227 | int i; | |
228 | ||
6d5be959 JG |
229 | if (rqd->nr_ppas > 1) { |
230 | for (i = 0; i < rqd->nr_ppas; i++) | |
069368e9 MB |
231 | rqd->ppa_list[i] = generic_to_dev_addr(dev, |
232 | rqd->ppa_list[i]); | |
233 | } else { | |
234 | rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); | |
235 | } | |
236 | } | |
237 | EXPORT_SYMBOL(nvm_generic_to_addr_mode); | |
238 | ||
abd805ec | 239 | int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, |
8680f165 | 240 | const struct ppa_addr *ppas, int nr_ppas, int vblk) |
069368e9 | 241 | { |
abd805ec | 242 | int i, plane_cnt, pl_idx; |
8680f165 | 243 | struct ppa_addr ppa; |
abd805ec | 244 | |
5ebc7d9f | 245 | if ((!vblk || dev->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) { |
6d5be959 | 246 | rqd->nr_ppas = nr_ppas; |
abd805ec | 247 | rqd->ppa_addr = ppas[0]; |
069368e9 | 248 | |
069368e9 | 249 | return 0; |
abd805ec | 250 | } |
069368e9 | 251 | |
6d5be959 | 252 | rqd->nr_ppas = nr_ppas; |
abd805ec MB |
253 | rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); |
254 | if (!rqd->ppa_list) { | |
255 | pr_err("nvm: failed to allocate dma memory\n"); | |
256 | return -ENOMEM; | |
257 | } | |
258 | ||
5ebc7d9f MB |
259 | if (!vblk) { |
260 | for (i = 0; i < nr_ppas; i++) | |
261 | rqd->ppa_list[i] = ppas[i]; | |
262 | } else { | |
263 | plane_cnt = dev->plane_mode; | |
6d5be959 | 264 | rqd->nr_ppas *= plane_cnt; |
5ebc7d9f | 265 | |
556755e9 | 266 | for (i = 0; i < nr_ppas; i++) { |
5ebc7d9f | 267 | for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { |
8680f165 MB |
268 | ppa = ppas[i]; |
269 | ppa.g.pl = pl_idx; | |
270 | rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa; | |
5ebc7d9f | 271 | } |
069368e9 MB |
272 | } |
273 | } | |
274 | ||
abd805ec MB |
275 | return 0; |
276 | } | |
277 | EXPORT_SYMBOL(nvm_set_rqd_ppalist); | |
278 | ||
279 | void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd) | |
280 | { | |
281 | if (!rqd->ppa_list) | |
282 | return; | |
283 | ||
284 | nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list); | |
285 | } | |
286 | EXPORT_SYMBOL(nvm_free_rqd_ppalist); | |
287 | ||
81e681d3 | 288 | int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas) |
abd805ec MB |
289 | { |
290 | struct nvm_rq rqd; | |
291 | int ret; | |
292 | ||
293 | if (!dev->ops->erase_block) | |
294 | return 0; | |
295 | ||
296 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
297 | ||
5ebc7d9f | 298 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); |
abd805ec MB |
299 | if (ret) |
300 | return ret; | |
301 | ||
069368e9 MB |
302 | nvm_generic_to_addr_mode(dev, &rqd); |
303 | ||
304 | ret = dev->ops->erase_block(dev, &rqd); | |
305 | ||
abd805ec | 306 | nvm_free_rqd_ppalist(dev, &rqd); |
069368e9 MB |
307 | |
308 | return ret; | |
309 | } | |
310 | EXPORT_SYMBOL(nvm_erase_ppa); | |
311 | ||
91276162 MB |
312 | void nvm_end_io(struct nvm_rq *rqd, int error) |
313 | { | |
72d256ec MB |
314 | rqd->error = error; |
315 | rqd->end_io(rqd); | |
91276162 MB |
316 | } |
317 | EXPORT_SYMBOL(nvm_end_io); | |
318 | ||
09719b62 | 319 | static void nvm_end_io_sync(struct nvm_rq *rqd) |
91276162 MB |
320 | { |
321 | struct completion *waiting = rqd->wait; | |
322 | ||
323 | rqd->wait = NULL; | |
324 | ||
325 | complete(waiting); | |
326 | } | |
327 | ||
d9e46d5d | 328 | static int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode, |
1145e635 | 329 | int flags, void *buf, int len) |
09719b62 MB |
330 | { |
331 | DECLARE_COMPLETION_ONSTACK(wait); | |
09719b62 MB |
332 | struct bio *bio; |
333 | int ret; | |
334 | unsigned long hang_check; | |
335 | ||
336 | bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL); | |
337 | if (IS_ERR_OR_NULL(bio)) | |
338 | return -ENOMEM; | |
339 | ||
1145e635 | 340 | nvm_generic_to_addr_mode(dev, rqd); |
09719b62 | 341 | |
1145e635 MB |
342 | rqd->dev = dev; |
343 | rqd->opcode = opcode; | |
344 | rqd->flags = flags; | |
345 | rqd->bio = bio; | |
346 | rqd->wait = &wait; | |
347 | rqd->end_io = nvm_end_io_sync; | |
09719b62 | 348 | |
1145e635 | 349 | ret = dev->ops->submit_io(dev, rqd); |
ecfb40c6 | 350 | if (ret) { |
ecfb40c6 MB |
351 | bio_put(bio); |
352 | return ret; | |
353 | } | |
09719b62 MB |
354 | |
355 | /* Prevent hang_check timer from firing at us during very long I/O */ | |
356 | hang_check = sysctl_hung_task_timeout_secs; | |
357 | if (hang_check) | |
12624af2 MB |
358 | while (!wait_for_completion_io_timeout(&wait, |
359 | hang_check * (HZ/2))) | |
360 | ; | |
09719b62 MB |
361 | else |
362 | wait_for_completion_io(&wait); | |
363 | ||
1145e635 MB |
364 | return rqd->error; |
365 | } | |
366 | ||
367 | /** | |
368 | * nvm_submit_ppa_list - submit user-defined ppa list to device. The user must | |
369 | * take to free ppa list if necessary. | |
370 | * @dev: device | |
371 | * @ppa_list: user created ppa_list | |
372 | * @nr_ppas: length of ppa_list | |
373 | * @opcode: device opcode | |
374 | * @flags: device flags | |
375 | * @buf: data buffer | |
376 | * @len: data buffer length | |
377 | */ | |
378 | int nvm_submit_ppa_list(struct nvm_dev *dev, struct ppa_addr *ppa_list, | |
379 | int nr_ppas, int opcode, int flags, void *buf, int len) | |
380 | { | |
381 | struct nvm_rq rqd; | |
382 | ||
383 | if (dev->ops->max_phys_sect < nr_ppas) | |
384 | return -EINVAL; | |
385 | ||
386 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
387 | ||
6d5be959 | 388 | rqd.nr_ppas = nr_ppas; |
1145e635 MB |
389 | if (nr_ppas > 1) |
390 | rqd.ppa_list = ppa_list; | |
391 | else | |
392 | rqd.ppa_addr = ppa_list[0]; | |
393 | ||
394 | return __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); | |
395 | } | |
396 | EXPORT_SYMBOL(nvm_submit_ppa_list); | |
397 | ||
398 | /** | |
399 | * nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded | |
400 | * as single, dual, quad plane PPAs depending on device type. | |
401 | * @dev: device | |
402 | * @ppa: user created ppa_list | |
403 | * @nr_ppas: length of ppa_list | |
404 | * @opcode: device opcode | |
405 | * @flags: device flags | |
406 | * @buf: data buffer | |
407 | * @len: data buffer length | |
408 | */ | |
409 | int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas, | |
410 | int opcode, int flags, void *buf, int len) | |
411 | { | |
412 | struct nvm_rq rqd; | |
413 | int ret; | |
414 | ||
415 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
5ebc7d9f | 416 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas, 1); |
1145e635 MB |
417 | if (ret) |
418 | return ret; | |
419 | ||
420 | ret = __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); | |
421 | ||
09719b62 MB |
422 | nvm_free_rqd_ppalist(dev, &rqd); |
423 | ||
1145e635 | 424 | return ret; |
09719b62 MB |
425 | } |
426 | EXPORT_SYMBOL(nvm_submit_ppa); | |
427 | ||
22e8c976 MB |
428 | /* |
429 | * folds a bad block list from its plane representation to its virtual | |
430 | * block representation. The fold is done in place and reduced size is | |
431 | * returned. | |
432 | * | |
433 | * If any of the planes status are bad or grown bad block, the virtual block | |
434 | * is marked bad. If not bad, the first plane state acts as the block state. | |
435 | */ | |
436 | int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) | |
437 | { | |
438 | int blk, offset, pl, blktype; | |
439 | ||
440 | if (nr_blks != dev->blks_per_lun * dev->plane_mode) | |
441 | return -EINVAL; | |
442 | ||
443 | for (blk = 0; blk < dev->blks_per_lun; blk++) { | |
444 | offset = blk * dev->plane_mode; | |
445 | blktype = blks[offset]; | |
446 | ||
447 | /* Bad blocks on any planes take precedence over other types */ | |
448 | for (pl = 0; pl < dev->plane_mode; pl++) { | |
449 | if (blks[offset + pl] & | |
450 | (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { | |
451 | blktype = blks[offset + pl]; | |
452 | break; | |
453 | } | |
454 | } | |
455 | ||
456 | blks[blk] = blktype; | |
457 | } | |
458 | ||
459 | return dev->blks_per_lun; | |
460 | } | |
461 | EXPORT_SYMBOL(nvm_bb_tbl_fold); | |
462 | ||
e11903f5 MB |
463 | int nvm_get_bb_tbl(struct nvm_dev *dev, struct ppa_addr ppa, u8 *blks) |
464 | { | |
465 | ppa = generic_to_dev_addr(dev, ppa); | |
466 | ||
467 | return dev->ops->get_bb_tbl(dev, ppa, blks); | |
468 | } | |
469 | EXPORT_SYMBOL(nvm_get_bb_tbl); | |
470 | ||
ca5927e7 MB |
471 | static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) |
472 | { | |
473 | int i; | |
474 | ||
475 | dev->lps_per_blk = dev->pgs_per_blk; | |
476 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
477 | if (!dev->lptbl) | |
478 | return -ENOMEM; | |
479 | ||
480 | /* Just a linear array */ | |
481 | for (i = 0; i < dev->lps_per_blk; i++) | |
482 | dev->lptbl[i] = i; | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
487 | static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) | |
488 | { | |
489 | int i, p; | |
490 | struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc; | |
491 | ||
492 | if (!mlc->num_pairs) | |
493 | return 0; | |
494 | ||
495 | dev->lps_per_blk = mlc->num_pairs; | |
496 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
497 | if (!dev->lptbl) | |
498 | return -ENOMEM; | |
499 | ||
500 | /* The lower page table encoding consists of a list of bytes, where each | |
501 | * has a lower and an upper half. The first half byte maintains the | |
502 | * increment value and every value after is an offset added to the | |
12624af2 MB |
503 | * previous incrementation value |
504 | */ | |
ca5927e7 MB |
505 | dev->lptbl[0] = mlc->pairs[0] & 0xF; |
506 | for (i = 1; i < dev->lps_per_blk; i++) { | |
507 | p = mlc->pairs[i >> 1]; | |
508 | if (i & 0x1) /* upper */ | |
509 | dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4); | |
510 | else /* lower */ | |
511 | dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF); | |
512 | } | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
cd9e9808 MB |
517 | static int nvm_core_init(struct nvm_dev *dev) |
518 | { | |
519 | struct nvm_id *id = &dev->identity; | |
520 | struct nvm_id_group *grp = &id->groups[0]; | |
7f7c5d03 | 521 | int ret; |
cd9e9808 MB |
522 | |
523 | /* device values */ | |
524 | dev->nr_chnls = grp->num_ch; | |
525 | dev->luns_per_chnl = grp->num_lun; | |
526 | dev->pgs_per_blk = grp->num_pg; | |
527 | dev->blks_per_lun = grp->num_blk; | |
528 | dev->nr_planes = grp->num_pln; | |
4891d120 MB |
529 | dev->fpg_size = grp->fpg_sz; |
530 | dev->pfpg_size = grp->fpg_sz * grp->num_pln; | |
cd9e9808 MB |
531 | dev->sec_size = grp->csecs; |
532 | dev->oob_size = grp->sos; | |
533 | dev->sec_per_pg = grp->fpg_sz / grp->csecs; | |
f9a99950 | 534 | dev->mccap = grp->mccap; |
7386af27 | 535 | memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); |
cd9e9808 MB |
536 | |
537 | dev->plane_mode = NVM_PLANE_SINGLE; | |
538 | dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size; | |
539 | ||
540 | if (grp->mpos & 0x020202) | |
541 | dev->plane_mode = NVM_PLANE_DOUBLE; | |
542 | if (grp->mpos & 0x040404) | |
543 | dev->plane_mode = NVM_PLANE_QUAD; | |
544 | ||
7f7c5d03 MB |
545 | if (grp->mtype != 0) { |
546 | pr_err("nvm: memory type not supported\n"); | |
547 | return -EINVAL; | |
548 | } | |
549 | ||
cd9e9808 MB |
550 | /* calculated values */ |
551 | dev->sec_per_pl = dev->sec_per_pg * dev->nr_planes; | |
552 | dev->sec_per_blk = dev->sec_per_pl * dev->pgs_per_blk; | |
553 | dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun; | |
554 | dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls; | |
555 | ||
ed2a92a6 | 556 | dev->total_secs = dev->nr_luns * dev->sec_per_lun; |
da1e2849 WT |
557 | dev->lun_map = kcalloc(BITS_TO_LONGS(dev->nr_luns), |
558 | sizeof(unsigned long), GFP_KERNEL); | |
559 | if (!dev->lun_map) | |
560 | return -ENOMEM; | |
7f7c5d03 MB |
561 | |
562 | switch (grp->fmtype) { | |
563 | case NVM_ID_FMTYPE_SLC: | |
564 | if (nvm_init_slc_tbl(dev, grp)) { | |
565 | ret = -ENOMEM; | |
566 | goto err_fmtype; | |
567 | } | |
568 | break; | |
569 | case NVM_ID_FMTYPE_MLC: | |
570 | if (nvm_init_mlc_tbl(dev, grp)) { | |
571 | ret = -ENOMEM; | |
572 | goto err_fmtype; | |
573 | } | |
574 | break; | |
575 | default: | |
576 | pr_err("nvm: flash type not supported\n"); | |
577 | ret = -EINVAL; | |
578 | goto err_fmtype; | |
579 | } | |
580 | ||
e3eb3799 | 581 | mutex_init(&dev->mlock); |
4c9dacb8 | 582 | spin_lock_init(&dev->lock); |
cd9e9808 MB |
583 | |
584 | return 0; | |
7f7c5d03 MB |
585 | err_fmtype: |
586 | kfree(dev->lun_map); | |
587 | return ret; | |
cd9e9808 MB |
588 | } |
589 | ||
976bdfca MB |
590 | static void nvm_free_mgr(struct nvm_dev *dev) |
591 | { | |
976bdfca MB |
592 | if (!dev->mt) |
593 | return; | |
594 | ||
976bdfca MB |
595 | dev->mt->unregister_mgr(dev); |
596 | dev->mt = NULL; | |
597 | } | |
598 | ||
cd9e9808 MB |
599 | static void nvm_free(struct nvm_dev *dev) |
600 | { | |
601 | if (!dev) | |
602 | return; | |
603 | ||
976bdfca | 604 | nvm_free_mgr(dev); |
ca5927e7 MB |
605 | |
606 | kfree(dev->lptbl); | |
7f7c5d03 | 607 | kfree(dev->lun_map); |
cd9e9808 MB |
608 | } |
609 | ||
610 | static int nvm_init(struct nvm_dev *dev) | |
611 | { | |
480fc0db | 612 | int ret = -EINVAL; |
cd9e9808 MB |
613 | |
614 | if (!dev->q || !dev->ops) | |
480fc0db | 615 | return ret; |
cd9e9808 | 616 | |
16f26c3a | 617 | if (dev->ops->identity(dev, &dev->identity)) { |
cd9e9808 | 618 | pr_err("nvm: device could not be identified\n"); |
cd9e9808 MB |
619 | goto err; |
620 | } | |
621 | ||
622 | pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n", | |
623 | dev->identity.ver_id, dev->identity.vmnt, | |
624 | dev->identity.cgrps); | |
625 | ||
626 | if (dev->identity.ver_id != 1) { | |
627 | pr_err("nvm: device not supported by kernel."); | |
628 | goto err; | |
629 | } | |
630 | ||
631 | if (dev->identity.cgrps != 1) { | |
632 | pr_err("nvm: only one group configuration supported."); | |
633 | goto err; | |
634 | } | |
635 | ||
636 | ret = nvm_core_init(dev); | |
637 | if (ret) { | |
638 | pr_err("nvm: could not initialize core structures.\n"); | |
639 | goto err; | |
640 | } | |
641 | ||
cd9e9808 MB |
642 | pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", |
643 | dev->name, dev->sec_per_pg, dev->nr_planes, | |
644 | dev->pgs_per_blk, dev->blks_per_lun, dev->nr_luns, | |
645 | dev->nr_chnls); | |
646 | return 0; | |
647 | err: | |
cd9e9808 MB |
648 | pr_err("nvm: failed to initialize nvm\n"); |
649 | return ret; | |
650 | } | |
651 | ||
652 | static void nvm_exit(struct nvm_dev *dev) | |
653 | { | |
75b85649 JG |
654 | if (dev->dma_pool) |
655 | dev->ops->destroy_dma_pool(dev->dma_pool); | |
cd9e9808 MB |
656 | nvm_free(dev); |
657 | ||
658 | pr_info("nvm: successfully unloaded\n"); | |
659 | } | |
660 | ||
661 | int nvm_register(struct request_queue *q, char *disk_name, | |
662 | struct nvm_dev_ops *ops) | |
663 | { | |
664 | struct nvm_dev *dev; | |
665 | int ret; | |
666 | ||
667 | if (!ops->identity) | |
668 | return -EINVAL; | |
669 | ||
670 | dev = kzalloc(sizeof(struct nvm_dev), GFP_KERNEL); | |
671 | if (!dev) | |
672 | return -ENOMEM; | |
673 | ||
674 | dev->q = q; | |
675 | dev->ops = ops; | |
676 | strncpy(dev->name, disk_name, DISK_NAME_LEN); | |
677 | ||
678 | ret = nvm_init(dev); | |
679 | if (ret) | |
680 | goto err_init; | |
681 | ||
d160147b WT |
682 | if (dev->ops->max_phys_sect > 256) { |
683 | pr_info("nvm: max sectors supported is 256.\n"); | |
684 | ret = -EINVAL; | |
685 | goto err_init; | |
686 | } | |
687 | ||
cd9e9808 | 688 | if (dev->ops->max_phys_sect > 1) { |
75b85649 JG |
689 | dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist"); |
690 | if (!dev->dma_pool) { | |
691 | pr_err("nvm: could not create dma pool\n"); | |
93e70c1f MB |
692 | ret = -ENOMEM; |
693 | goto err_init; | |
cd9e9808 | 694 | } |
cd9e9808 MB |
695 | } |
696 | ||
bf643185 MB |
697 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
698 | ret = nvm_get_sysblock(dev, &dev->sb); | |
699 | if (!ret) | |
700 | pr_err("nvm: device not initialized.\n"); | |
701 | else if (ret < 0) | |
702 | pr_err("nvm: err (%d) on device initialization\n", ret); | |
703 | } | |
b7692076 | 704 | |
762796bc | 705 | /* register device with a supported media manager */ |
edad2e66 | 706 | down_write(&nvm_lock); |
b7692076 MB |
707 | if (ret > 0) |
708 | dev->mt = nvm_init_mgr(dev); | |
edad2e66 MB |
709 | list_add(&dev->devices, &nvm_devices); |
710 | up_write(&nvm_lock); | |
711 | ||
cd9e9808 MB |
712 | return 0; |
713 | err_init: | |
da1e2849 | 714 | kfree(dev->lun_map); |
cd9e9808 MB |
715 | kfree(dev); |
716 | return ret; | |
717 | } | |
718 | EXPORT_SYMBOL(nvm_register); | |
719 | ||
720 | void nvm_unregister(char *disk_name) | |
721 | { | |
d0a712ce | 722 | struct nvm_dev *dev; |
cd9e9808 | 723 | |
d0a712ce WT |
724 | down_write(&nvm_lock); |
725 | dev = nvm_find_nvm_dev(disk_name); | |
cd9e9808 MB |
726 | if (!dev) { |
727 | pr_err("nvm: could not find device %s to unregister\n", | |
728 | disk_name); | |
d0a712ce | 729 | up_write(&nvm_lock); |
cd9e9808 MB |
730 | return; |
731 | } | |
732 | ||
cd9e9808 MB |
733 | list_del(&dev->devices); |
734 | up_write(&nvm_lock); | |
c1480ad5 MB |
735 | |
736 | nvm_exit(dev); | |
737 | kfree(dev); | |
cd9e9808 MB |
738 | } |
739 | EXPORT_SYMBOL(nvm_unregister); | |
740 | ||
cd9e9808 MB |
741 | static int __nvm_configure_create(struct nvm_ioctl_create *create) |
742 | { | |
743 | struct nvm_dev *dev; | |
744 | struct nvm_ioctl_create_simple *s; | |
745 | ||
d0a712ce | 746 | down_write(&nvm_lock); |
cd9e9808 | 747 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 748 | up_write(&nvm_lock); |
b76eb20b | 749 | |
cd9e9808 MB |
750 | if (!dev) { |
751 | pr_err("nvm: device not found\n"); | |
752 | return -EINVAL; | |
753 | } | |
754 | ||
b76eb20b MB |
755 | if (!dev->mt) { |
756 | pr_info("nvm: device has no media manager registered.\n"); | |
757 | return -ENODEV; | |
758 | } | |
759 | ||
cd9e9808 MB |
760 | if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) { |
761 | pr_err("nvm: config type not valid\n"); | |
762 | return -EINVAL; | |
763 | } | |
764 | s = &create->conf.s; | |
765 | ||
766 | if (s->lun_begin > s->lun_end || s->lun_end > dev->nr_luns) { | |
767 | pr_err("nvm: lun out of bound (%u:%u > %u)\n", | |
768 | s->lun_begin, s->lun_end, dev->nr_luns); | |
769 | return -EINVAL; | |
770 | } | |
771 | ||
b76eb20b | 772 | return dev->mt->create_tgt(dev, create); |
cd9e9808 MB |
773 | } |
774 | ||
775 | #ifdef CONFIG_NVM_DEBUG | |
776 | static int nvm_configure_show(const char *val) | |
777 | { | |
778 | struct nvm_dev *dev; | |
779 | char opcode, devname[DISK_NAME_LEN]; | |
780 | int ret; | |
781 | ||
782 | ret = sscanf(val, "%c %32s", &opcode, devname); | |
783 | if (ret != 2) { | |
784 | pr_err("nvm: invalid command. Use \"opcode devicename\".\n"); | |
785 | return -EINVAL; | |
786 | } | |
787 | ||
d0a712ce | 788 | down_write(&nvm_lock); |
cd9e9808 | 789 | dev = nvm_find_nvm_dev(devname); |
d0a712ce | 790 | up_write(&nvm_lock); |
cd9e9808 MB |
791 | if (!dev) { |
792 | pr_err("nvm: device not found\n"); | |
793 | return -EINVAL; | |
794 | } | |
795 | ||
796 | if (!dev->mt) | |
797 | return 0; | |
798 | ||
2fde0e48 | 799 | dev->mt->lun_info_print(dev); |
cd9e9808 MB |
800 | |
801 | return 0; | |
802 | } | |
803 | ||
804 | static int nvm_configure_remove(const char *val) | |
805 | { | |
806 | struct nvm_ioctl_remove remove; | |
b76eb20b | 807 | struct nvm_dev *dev; |
cd9e9808 | 808 | char opcode; |
b76eb20b | 809 | int ret = 0; |
cd9e9808 MB |
810 | |
811 | ret = sscanf(val, "%c %256s", &opcode, remove.tgtname); | |
812 | if (ret != 2) { | |
813 | pr_err("nvm: invalid command. Use \"d targetname\".\n"); | |
814 | return -EINVAL; | |
815 | } | |
816 | ||
817 | remove.flags = 0; | |
818 | ||
b76eb20b MB |
819 | list_for_each_entry(dev, &nvm_devices, devices) { |
820 | ret = dev->mt->remove_tgt(dev, &remove); | |
821 | if (!ret) | |
822 | break; | |
823 | } | |
824 | ||
825 | return ret; | |
cd9e9808 MB |
826 | } |
827 | ||
828 | static int nvm_configure_create(const char *val) | |
829 | { | |
830 | struct nvm_ioctl_create create; | |
831 | char opcode; | |
832 | int lun_begin, lun_end, ret; | |
833 | ||
834 | ret = sscanf(val, "%c %256s %256s %48s %u:%u", &opcode, create.dev, | |
835 | create.tgtname, create.tgttype, | |
836 | &lun_begin, &lun_end); | |
837 | if (ret != 6) { | |
838 | pr_err("nvm: invalid command. Use \"opcode device name tgttype lun_begin:lun_end\".\n"); | |
839 | return -EINVAL; | |
840 | } | |
841 | ||
842 | create.flags = 0; | |
843 | create.conf.type = NVM_CONFIG_TYPE_SIMPLE; | |
844 | create.conf.s.lun_begin = lun_begin; | |
845 | create.conf.s.lun_end = lun_end; | |
846 | ||
847 | return __nvm_configure_create(&create); | |
848 | } | |
849 | ||
850 | ||
851 | /* Exposes administrative interface through /sys/module/lnvm/configure_by_str */ | |
852 | static int nvm_configure_by_str_event(const char *val, | |
853 | const struct kernel_param *kp) | |
854 | { | |
855 | char opcode; | |
856 | int ret; | |
857 | ||
858 | ret = sscanf(val, "%c", &opcode); | |
859 | if (ret != 1) { | |
860 | pr_err("nvm: string must have the format of \"cmd ...\"\n"); | |
861 | return -EINVAL; | |
862 | } | |
863 | ||
864 | switch (opcode) { | |
865 | case 'a': | |
866 | return nvm_configure_create(val); | |
867 | case 'd': | |
868 | return nvm_configure_remove(val); | |
869 | case 's': | |
870 | return nvm_configure_show(val); | |
871 | default: | |
872 | pr_err("nvm: invalid command\n"); | |
873 | return -EINVAL; | |
874 | } | |
875 | ||
876 | return 0; | |
877 | } | |
878 | ||
879 | static int nvm_configure_get(char *buf, const struct kernel_param *kp) | |
880 | { | |
5e422cff | 881 | int sz; |
cd9e9808 MB |
882 | struct nvm_dev *dev; |
883 | ||
5e422cff | 884 | sz = sprintf(buf, "available devices:\n"); |
cd9e9808 MB |
885 | down_write(&nvm_lock); |
886 | list_for_each_entry(dev, &nvm_devices, devices) { | |
5e422cff | 887 | if (sz > 4095 - DISK_NAME_LEN - 2) |
cd9e9808 | 888 | break; |
5e422cff | 889 | sz += sprintf(buf + sz, " %32s\n", dev->name); |
cd9e9808 MB |
890 | } |
891 | up_write(&nvm_lock); | |
892 | ||
5e422cff | 893 | return sz; |
cd9e9808 MB |
894 | } |
895 | ||
896 | static const struct kernel_param_ops nvm_configure_by_str_event_param_ops = { | |
897 | .set = nvm_configure_by_str_event, | |
898 | .get = nvm_configure_get, | |
899 | }; | |
900 | ||
901 | #undef MODULE_PARAM_PREFIX | |
902 | #define MODULE_PARAM_PREFIX "lnvm." | |
903 | ||
904 | module_param_cb(configure_debug, &nvm_configure_by_str_event_param_ops, NULL, | |
905 | 0644); | |
906 | ||
907 | #endif /* CONFIG_NVM_DEBUG */ | |
908 | ||
909 | static long nvm_ioctl_info(struct file *file, void __user *arg) | |
910 | { | |
911 | struct nvm_ioctl_info *info; | |
912 | struct nvm_tgt_type *tt; | |
913 | int tgt_iter = 0; | |
914 | ||
915 | if (!capable(CAP_SYS_ADMIN)) | |
916 | return -EPERM; | |
917 | ||
918 | info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); | |
919 | if (IS_ERR(info)) | |
920 | return -EFAULT; | |
921 | ||
922 | info->version[0] = NVM_VERSION_MAJOR; | |
923 | info->version[1] = NVM_VERSION_MINOR; | |
924 | info->version[2] = NVM_VERSION_PATCH; | |
925 | ||
926 | down_write(&nvm_lock); | |
6063fe39 | 927 | list_for_each_entry(tt, &nvm_tgt_types, list) { |
cd9e9808 MB |
928 | struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; |
929 | ||
930 | tgt->version[0] = tt->version[0]; | |
931 | tgt->version[1] = tt->version[1]; | |
932 | tgt->version[2] = tt->version[2]; | |
933 | strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); | |
934 | ||
935 | tgt_iter++; | |
936 | } | |
937 | ||
938 | info->tgtsize = tgt_iter; | |
939 | up_write(&nvm_lock); | |
940 | ||
76e25081 SM |
941 | if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { |
942 | kfree(info); | |
cd9e9808 | 943 | return -EFAULT; |
76e25081 | 944 | } |
cd9e9808 MB |
945 | |
946 | kfree(info); | |
947 | return 0; | |
948 | } | |
949 | ||
950 | static long nvm_ioctl_get_devices(struct file *file, void __user *arg) | |
951 | { | |
952 | struct nvm_ioctl_get_devices *devices; | |
953 | struct nvm_dev *dev; | |
954 | int i = 0; | |
955 | ||
956 | if (!capable(CAP_SYS_ADMIN)) | |
957 | return -EPERM; | |
958 | ||
959 | devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); | |
960 | if (!devices) | |
961 | return -ENOMEM; | |
962 | ||
963 | down_write(&nvm_lock); | |
964 | list_for_each_entry(dev, &nvm_devices, devices) { | |
965 | struct nvm_ioctl_device_info *info = &devices->info[i]; | |
966 | ||
967 | sprintf(info->devname, "%s", dev->name); | |
968 | if (dev->mt) { | |
969 | info->bmversion[0] = dev->mt->version[0]; | |
970 | info->bmversion[1] = dev->mt->version[1]; | |
971 | info->bmversion[2] = dev->mt->version[2]; | |
972 | sprintf(info->bmname, "%s", dev->mt->name); | |
973 | } else { | |
974 | sprintf(info->bmname, "none"); | |
975 | } | |
976 | ||
977 | i++; | |
978 | if (i > 31) { | |
979 | pr_err("nvm: max 31 devices can be reported.\n"); | |
980 | break; | |
981 | } | |
982 | } | |
983 | up_write(&nvm_lock); | |
984 | ||
985 | devices->nr_devices = i; | |
986 | ||
76e25081 SM |
987 | if (copy_to_user(arg, devices, |
988 | sizeof(struct nvm_ioctl_get_devices))) { | |
989 | kfree(devices); | |
cd9e9808 | 990 | return -EFAULT; |
76e25081 | 991 | } |
cd9e9808 MB |
992 | |
993 | kfree(devices); | |
994 | return 0; | |
995 | } | |
996 | ||
997 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
998 | { | |
999 | struct nvm_ioctl_create create; | |
1000 | ||
1001 | if (!capable(CAP_SYS_ADMIN)) | |
1002 | return -EPERM; | |
1003 | ||
1004 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) | |
1005 | return -EFAULT; | |
1006 | ||
1007 | create.dev[DISK_NAME_LEN - 1] = '\0'; | |
1008 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
1009 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1010 | ||
1011 | if (create.flags != 0) { | |
1012 | pr_err("nvm: no flags supported\n"); | |
1013 | return -EINVAL; | |
1014 | } | |
1015 | ||
1016 | return __nvm_configure_create(&create); | |
1017 | } | |
1018 | ||
1019 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
1020 | { | |
1021 | struct nvm_ioctl_remove remove; | |
b76eb20b MB |
1022 | struct nvm_dev *dev; |
1023 | int ret = 0; | |
cd9e9808 MB |
1024 | |
1025 | if (!capable(CAP_SYS_ADMIN)) | |
1026 | return -EPERM; | |
1027 | ||
1028 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) | |
1029 | return -EFAULT; | |
1030 | ||
1031 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1032 | ||
1033 | if (remove.flags != 0) { | |
1034 | pr_err("nvm: no flags supported\n"); | |
1035 | return -EINVAL; | |
1036 | } | |
1037 | ||
b76eb20b MB |
1038 | list_for_each_entry(dev, &nvm_devices, devices) { |
1039 | ret = dev->mt->remove_tgt(dev, &remove); | |
1040 | if (!ret) | |
1041 | break; | |
1042 | } | |
1043 | ||
1044 | return ret; | |
cd9e9808 MB |
1045 | } |
1046 | ||
55696154 MB |
1047 | static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info) |
1048 | { | |
1049 | info->seqnr = 1; | |
1050 | info->erase_cnt = 0; | |
1051 | info->version = 1; | |
1052 | } | |
1053 | ||
1054 | static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init) | |
1055 | { | |
1056 | struct nvm_dev *dev; | |
1057 | struct nvm_sb_info info; | |
b7692076 | 1058 | int ret; |
55696154 MB |
1059 | |
1060 | down_write(&nvm_lock); | |
1061 | dev = nvm_find_nvm_dev(init->dev); | |
1062 | up_write(&nvm_lock); | |
1063 | if (!dev) { | |
1064 | pr_err("nvm: device not found\n"); | |
1065 | return -EINVAL; | |
1066 | } | |
1067 | ||
1068 | nvm_setup_nvm_sb_info(&info); | |
1069 | ||
1070 | strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN); | |
1071 | info.fs_ppa.ppa = -1; | |
1072 | ||
bf643185 MB |
1073 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
1074 | ret = nvm_init_sysblock(dev, &info); | |
1075 | if (ret) | |
1076 | return ret; | |
1077 | } | |
b7692076 MB |
1078 | |
1079 | memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info)); | |
1080 | ||
1081 | down_write(&nvm_lock); | |
1082 | dev->mt = nvm_init_mgr(dev); | |
1083 | up_write(&nvm_lock); | |
1084 | ||
1085 | return 0; | |
55696154 MB |
1086 | } |
1087 | ||
1088 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) | |
1089 | { | |
1090 | struct nvm_ioctl_dev_init init; | |
1091 | ||
1092 | if (!capable(CAP_SYS_ADMIN)) | |
1093 | return -EPERM; | |
1094 | ||
1095 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) | |
1096 | return -EFAULT; | |
1097 | ||
1098 | if (init.flags != 0) { | |
1099 | pr_err("nvm: no flags supported\n"); | |
1100 | return -EINVAL; | |
1101 | } | |
1102 | ||
1103 | init.dev[DISK_NAME_LEN - 1] = '\0'; | |
1104 | ||
1105 | return __nvm_ioctl_dev_init(&init); | |
1106 | } | |
1107 | ||
8b4970c4 MB |
1108 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
1109 | { | |
1110 | struct nvm_ioctl_dev_factory fact; | |
1111 | struct nvm_dev *dev; | |
1112 | ||
1113 | if (!capable(CAP_SYS_ADMIN)) | |
1114 | return -EPERM; | |
1115 | ||
1116 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) | |
1117 | return -EFAULT; | |
1118 | ||
1119 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1120 | ||
1121 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1122 | return -EINVAL; | |
1123 | ||
1124 | down_write(&nvm_lock); | |
1125 | dev = nvm_find_nvm_dev(fact.dev); | |
1126 | up_write(&nvm_lock); | |
1127 | if (!dev) { | |
1128 | pr_err("nvm: device not found\n"); | |
1129 | return -EINVAL; | |
1130 | } | |
1131 | ||
976bdfca | 1132 | nvm_free_mgr(dev); |
8b4970c4 | 1133 | |
bf643185 MB |
1134 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) |
1135 | return nvm_dev_factory(dev, fact.flags); | |
1136 | ||
1137 | return 0; | |
8b4970c4 MB |
1138 | } |
1139 | ||
cd9e9808 MB |
1140 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1141 | { | |
1142 | void __user *argp = (void __user *)arg; | |
1143 | ||
1144 | switch (cmd) { | |
1145 | case NVM_INFO: | |
1146 | return nvm_ioctl_info(file, argp); | |
1147 | case NVM_GET_DEVICES: | |
1148 | return nvm_ioctl_get_devices(file, argp); | |
1149 | case NVM_DEV_CREATE: | |
1150 | return nvm_ioctl_dev_create(file, argp); | |
1151 | case NVM_DEV_REMOVE: | |
1152 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1153 | case NVM_DEV_INIT: |
1154 | return nvm_ioctl_dev_init(file, argp); | |
8b4970c4 MB |
1155 | case NVM_DEV_FACTORY: |
1156 | return nvm_ioctl_dev_factory(file, argp); | |
cd9e9808 MB |
1157 | } |
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | static const struct file_operations _ctl_fops = { | |
1162 | .open = nonseekable_open, | |
1163 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1164 | .owner = THIS_MODULE, | |
1165 | .llseek = noop_llseek, | |
1166 | }; | |
1167 | ||
1168 | static struct miscdevice _nvm_misc = { | |
1169 | .minor = MISC_DYNAMIC_MINOR, | |
1170 | .name = "lightnvm", | |
1171 | .nodename = "lightnvm/control", | |
1172 | .fops = &_ctl_fops, | |
1173 | }; | |
1174 | ||
1175 | MODULE_ALIAS_MISCDEV(MISC_DYNAMIC_MINOR); | |
1176 | ||
1177 | static int __init nvm_mod_init(void) | |
1178 | { | |
1179 | int ret; | |
1180 | ||
1181 | ret = misc_register(&_nvm_misc); | |
1182 | if (ret) | |
1183 | pr_err("nvm: misc_register failed for control device"); | |
1184 | ||
1185 | return ret; | |
1186 | } | |
1187 | ||
1188 | static void __exit nvm_mod_exit(void) | |
1189 | { | |
1190 | misc_deregister(&_nvm_misc); | |
1191 | } | |
1192 | ||
1193 | MODULE_AUTHOR("Matias Bjorling <m@bjorling.me>"); | |
1194 | MODULE_LICENSE("GPL v2"); | |
1195 | MODULE_VERSION("0.1"); | |
1196 | module_init(nvm_mod_init); | |
1197 | module_exit(nvm_mod_exit); |