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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 | ||
a24ba464 JG |
179 | int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas, |
180 | int type) | |
181 | { | |
182 | struct nvm_rq rqd; | |
183 | int ret; | |
184 | ||
185 | if (nr_ppas > dev->ops->max_phys_sect) { | |
186 | pr_err("nvm: unable to update all sysblocks atomically\n"); | |
187 | return -EINVAL; | |
188 | } | |
189 | ||
190 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
191 | ||
192 | nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); | |
193 | nvm_generic_to_addr_mode(dev, &rqd); | |
194 | ||
195 | ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); | |
196 | nvm_free_rqd_ppalist(dev, &rqd); | |
197 | if (ret) { | |
198 | pr_err("nvm: sysblk failed bb mark\n"); | |
199 | return -EINVAL; | |
200 | } | |
201 | ||
202 | return 0; | |
203 | } | |
204 | EXPORT_SYMBOL(nvm_set_bb_tbl); | |
205 | ||
8e53624d | 206 | int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
cd9e9808 | 207 | { |
8e53624d JG |
208 | struct nvm_dev *dev = tgt_dev->parent; |
209 | ||
210 | return dev->mt->submit_io(tgt_dev, rqd); | |
cd9e9808 MB |
211 | } |
212 | EXPORT_SYMBOL(nvm_submit_io); | |
213 | ||
8e53624d | 214 | int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, int flags) |
cd9e9808 | 215 | { |
8e53624d JG |
216 | struct nvm_dev *dev = tgt_dev->parent; |
217 | ||
218 | return dev->mt->erase_blk(tgt_dev, p, flags); | |
cd9e9808 MB |
219 | } |
220 | EXPORT_SYMBOL(nvm_erase_blk); | |
221 | ||
959e911b JG |
222 | int nvm_get_l2p_tbl(struct nvm_dev *dev, u64 slba, u32 nlb, |
223 | nvm_l2p_update_fn *update_l2p, void *priv) | |
224 | { | |
225 | if (!dev->ops->get_l2p_tbl) | |
226 | return 0; | |
227 | ||
228 | return dev->ops->get_l2p_tbl(dev, slba, nlb, update_l2p, priv); | |
229 | } | |
230 | EXPORT_SYMBOL(nvm_get_l2p_tbl); | |
231 | ||
232 | int nvm_get_area(struct nvm_dev *dev, sector_t *lba, sector_t len) | |
233 | { | |
234 | return dev->mt->get_area(dev, lba, len); | |
235 | } | |
236 | EXPORT_SYMBOL(nvm_get_area); | |
237 | ||
238 | void nvm_put_area(struct nvm_dev *dev, sector_t lba) | |
239 | { | |
240 | dev->mt->put_area(dev, lba); | |
241 | } | |
242 | EXPORT_SYMBOL(nvm_put_area); | |
243 | ||
069368e9 MB |
244 | void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd) |
245 | { | |
246 | int i; | |
247 | ||
6d5be959 JG |
248 | if (rqd->nr_ppas > 1) { |
249 | for (i = 0; i < rqd->nr_ppas; i++) | |
069368e9 MB |
250 | rqd->ppa_list[i] = dev_to_generic_addr(dev, |
251 | rqd->ppa_list[i]); | |
252 | } else { | |
253 | rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr); | |
254 | } | |
255 | } | |
256 | EXPORT_SYMBOL(nvm_addr_to_generic_mode); | |
257 | ||
258 | void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd) | |
259 | { | |
260 | int i; | |
261 | ||
6d5be959 JG |
262 | if (rqd->nr_ppas > 1) { |
263 | for (i = 0; i < rqd->nr_ppas; i++) | |
069368e9 MB |
264 | rqd->ppa_list[i] = generic_to_dev_addr(dev, |
265 | rqd->ppa_list[i]); | |
266 | } else { | |
267 | rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); | |
268 | } | |
269 | } | |
270 | EXPORT_SYMBOL(nvm_generic_to_addr_mode); | |
271 | ||
abd805ec | 272 | int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, |
8680f165 | 273 | const struct ppa_addr *ppas, int nr_ppas, int vblk) |
069368e9 | 274 | { |
8e79b5cb | 275 | struct nvm_geo *geo = &dev->geo; |
abd805ec | 276 | int i, plane_cnt, pl_idx; |
8680f165 | 277 | struct ppa_addr ppa; |
abd805ec | 278 | |
8e79b5cb | 279 | if ((!vblk || geo->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) { |
6d5be959 | 280 | rqd->nr_ppas = nr_ppas; |
abd805ec | 281 | rqd->ppa_addr = ppas[0]; |
069368e9 | 282 | |
069368e9 | 283 | return 0; |
abd805ec | 284 | } |
069368e9 | 285 | |
6d5be959 | 286 | rqd->nr_ppas = nr_ppas; |
abd805ec MB |
287 | rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); |
288 | if (!rqd->ppa_list) { | |
289 | pr_err("nvm: failed to allocate dma memory\n"); | |
290 | return -ENOMEM; | |
291 | } | |
292 | ||
5ebc7d9f MB |
293 | if (!vblk) { |
294 | for (i = 0; i < nr_ppas; i++) | |
295 | rqd->ppa_list[i] = ppas[i]; | |
296 | } else { | |
8e79b5cb | 297 | plane_cnt = geo->plane_mode; |
6d5be959 | 298 | rqd->nr_ppas *= plane_cnt; |
5ebc7d9f | 299 | |
556755e9 | 300 | for (i = 0; i < nr_ppas; i++) { |
5ebc7d9f | 301 | for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { |
8680f165 MB |
302 | ppa = ppas[i]; |
303 | ppa.g.pl = pl_idx; | |
304 | rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa; | |
5ebc7d9f | 305 | } |
069368e9 MB |
306 | } |
307 | } | |
308 | ||
abd805ec MB |
309 | return 0; |
310 | } | |
311 | EXPORT_SYMBOL(nvm_set_rqd_ppalist); | |
312 | ||
313 | void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd) | |
314 | { | |
315 | if (!rqd->ppa_list) | |
316 | return; | |
317 | ||
318 | nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list); | |
319 | } | |
320 | EXPORT_SYMBOL(nvm_free_rqd_ppalist); | |
321 | ||
bb314979 JG |
322 | int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas, |
323 | int flags) | |
abd805ec MB |
324 | { |
325 | struct nvm_rq rqd; | |
326 | int ret; | |
327 | ||
328 | if (!dev->ops->erase_block) | |
329 | return 0; | |
330 | ||
331 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
332 | ||
5ebc7d9f | 333 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); |
abd805ec MB |
334 | if (ret) |
335 | return ret; | |
336 | ||
069368e9 MB |
337 | nvm_generic_to_addr_mode(dev, &rqd); |
338 | ||
bb314979 JG |
339 | rqd.flags = flags; |
340 | ||
069368e9 MB |
341 | ret = dev->ops->erase_block(dev, &rqd); |
342 | ||
abd805ec | 343 | nvm_free_rqd_ppalist(dev, &rqd); |
069368e9 MB |
344 | |
345 | return ret; | |
346 | } | |
347 | EXPORT_SYMBOL(nvm_erase_ppa); | |
348 | ||
91276162 MB |
349 | void nvm_end_io(struct nvm_rq *rqd, int error) |
350 | { | |
72d256ec MB |
351 | rqd->error = error; |
352 | rqd->end_io(rqd); | |
91276162 MB |
353 | } |
354 | EXPORT_SYMBOL(nvm_end_io); | |
355 | ||
09719b62 | 356 | static void nvm_end_io_sync(struct nvm_rq *rqd) |
91276162 MB |
357 | { |
358 | struct completion *waiting = rqd->wait; | |
359 | ||
360 | rqd->wait = NULL; | |
361 | ||
362 | complete(waiting); | |
363 | } | |
364 | ||
d9e46d5d | 365 | static int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode, |
1145e635 | 366 | int flags, void *buf, int len) |
09719b62 MB |
367 | { |
368 | DECLARE_COMPLETION_ONSTACK(wait); | |
09719b62 MB |
369 | struct bio *bio; |
370 | int ret; | |
371 | unsigned long hang_check; | |
372 | ||
373 | bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL); | |
374 | if (IS_ERR_OR_NULL(bio)) | |
375 | return -ENOMEM; | |
376 | ||
1145e635 | 377 | nvm_generic_to_addr_mode(dev, rqd); |
09719b62 | 378 | |
8e53624d | 379 | rqd->dev = NULL; |
1145e635 MB |
380 | rqd->opcode = opcode; |
381 | rqd->flags = flags; | |
382 | rqd->bio = bio; | |
383 | rqd->wait = &wait; | |
384 | rqd->end_io = nvm_end_io_sync; | |
09719b62 | 385 | |
1145e635 | 386 | ret = dev->ops->submit_io(dev, rqd); |
ecfb40c6 | 387 | if (ret) { |
ecfb40c6 MB |
388 | bio_put(bio); |
389 | return ret; | |
390 | } | |
09719b62 MB |
391 | |
392 | /* Prevent hang_check timer from firing at us during very long I/O */ | |
393 | hang_check = sysctl_hung_task_timeout_secs; | |
394 | if (hang_check) | |
12624af2 MB |
395 | while (!wait_for_completion_io_timeout(&wait, |
396 | hang_check * (HZ/2))) | |
397 | ; | |
09719b62 MB |
398 | else |
399 | wait_for_completion_io(&wait); | |
400 | ||
1145e635 MB |
401 | return rqd->error; |
402 | } | |
403 | ||
404 | /** | |
405 | * nvm_submit_ppa_list - submit user-defined ppa list to device. The user must | |
406 | * take to free ppa list if necessary. | |
407 | * @dev: device | |
408 | * @ppa_list: user created ppa_list | |
409 | * @nr_ppas: length of ppa_list | |
410 | * @opcode: device opcode | |
411 | * @flags: device flags | |
412 | * @buf: data buffer | |
413 | * @len: data buffer length | |
414 | */ | |
415 | int nvm_submit_ppa_list(struct nvm_dev *dev, struct ppa_addr *ppa_list, | |
416 | int nr_ppas, int opcode, int flags, void *buf, int len) | |
417 | { | |
418 | struct nvm_rq rqd; | |
419 | ||
420 | if (dev->ops->max_phys_sect < nr_ppas) | |
421 | return -EINVAL; | |
422 | ||
423 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
424 | ||
6d5be959 | 425 | rqd.nr_ppas = nr_ppas; |
1145e635 MB |
426 | if (nr_ppas > 1) |
427 | rqd.ppa_list = ppa_list; | |
428 | else | |
429 | rqd.ppa_addr = ppa_list[0]; | |
430 | ||
431 | return __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); | |
432 | } | |
433 | EXPORT_SYMBOL(nvm_submit_ppa_list); | |
434 | ||
435 | /** | |
436 | * nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded | |
437 | * as single, dual, quad plane PPAs depending on device type. | |
438 | * @dev: device | |
439 | * @ppa: user created ppa_list | |
440 | * @nr_ppas: length of ppa_list | |
441 | * @opcode: device opcode | |
442 | * @flags: device flags | |
443 | * @buf: data buffer | |
444 | * @len: data buffer length | |
445 | */ | |
446 | int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas, | |
447 | int opcode, int flags, void *buf, int len) | |
448 | { | |
449 | struct nvm_rq rqd; | |
450 | int ret; | |
451 | ||
452 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
5ebc7d9f | 453 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas, 1); |
1145e635 MB |
454 | if (ret) |
455 | return ret; | |
456 | ||
457 | ret = __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); | |
458 | ||
09719b62 MB |
459 | nvm_free_rqd_ppalist(dev, &rqd); |
460 | ||
1145e635 | 461 | return ret; |
09719b62 MB |
462 | } |
463 | EXPORT_SYMBOL(nvm_submit_ppa); | |
464 | ||
22e8c976 MB |
465 | /* |
466 | * folds a bad block list from its plane representation to its virtual | |
467 | * block representation. The fold is done in place and reduced size is | |
468 | * returned. | |
469 | * | |
470 | * If any of the planes status are bad or grown bad block, the virtual block | |
471 | * is marked bad. If not bad, the first plane state acts as the block state. | |
472 | */ | |
473 | int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) | |
474 | { | |
8e79b5cb | 475 | struct nvm_geo *geo = &dev->geo; |
22e8c976 MB |
476 | int blk, offset, pl, blktype; |
477 | ||
8e79b5cb | 478 | if (nr_blks != geo->blks_per_lun * geo->plane_mode) |
22e8c976 MB |
479 | return -EINVAL; |
480 | ||
8e79b5cb JG |
481 | for (blk = 0; blk < geo->blks_per_lun; blk++) { |
482 | offset = blk * geo->plane_mode; | |
22e8c976 MB |
483 | blktype = blks[offset]; |
484 | ||
485 | /* Bad blocks on any planes take precedence over other types */ | |
8e79b5cb | 486 | for (pl = 0; pl < geo->plane_mode; pl++) { |
22e8c976 MB |
487 | if (blks[offset + pl] & |
488 | (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { | |
489 | blktype = blks[offset + pl]; | |
490 | break; | |
491 | } | |
492 | } | |
493 | ||
494 | blks[blk] = blktype; | |
495 | } | |
496 | ||
8e79b5cb | 497 | return geo->blks_per_lun; |
22e8c976 MB |
498 | } |
499 | EXPORT_SYMBOL(nvm_bb_tbl_fold); | |
500 | ||
e11903f5 MB |
501 | int nvm_get_bb_tbl(struct nvm_dev *dev, struct ppa_addr ppa, u8 *blks) |
502 | { | |
503 | ppa = generic_to_dev_addr(dev, ppa); | |
504 | ||
505 | return dev->ops->get_bb_tbl(dev, ppa, blks); | |
506 | } | |
507 | EXPORT_SYMBOL(nvm_get_bb_tbl); | |
508 | ||
ca5927e7 MB |
509 | static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) |
510 | { | |
8e79b5cb | 511 | struct nvm_geo *geo = &dev->geo; |
ca5927e7 MB |
512 | int i; |
513 | ||
8e79b5cb | 514 | dev->lps_per_blk = geo->pgs_per_blk; |
ca5927e7 MB |
515 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); |
516 | if (!dev->lptbl) | |
517 | return -ENOMEM; | |
518 | ||
519 | /* Just a linear array */ | |
520 | for (i = 0; i < dev->lps_per_blk; i++) | |
521 | dev->lptbl[i] = i; | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) | |
527 | { | |
528 | int i, p; | |
529 | struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc; | |
530 | ||
531 | if (!mlc->num_pairs) | |
532 | return 0; | |
533 | ||
534 | dev->lps_per_blk = mlc->num_pairs; | |
535 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
536 | if (!dev->lptbl) | |
537 | return -ENOMEM; | |
538 | ||
539 | /* The lower page table encoding consists of a list of bytes, where each | |
540 | * has a lower and an upper half. The first half byte maintains the | |
541 | * increment value and every value after is an offset added to the | |
12624af2 MB |
542 | * previous incrementation value |
543 | */ | |
ca5927e7 MB |
544 | dev->lptbl[0] = mlc->pairs[0] & 0xF; |
545 | for (i = 1; i < dev->lps_per_blk; i++) { | |
546 | p = mlc->pairs[i >> 1]; | |
547 | if (i & 0x1) /* upper */ | |
548 | dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4); | |
549 | else /* lower */ | |
550 | dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF); | |
551 | } | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
cd9e9808 MB |
556 | static int nvm_core_init(struct nvm_dev *dev) |
557 | { | |
558 | struct nvm_id *id = &dev->identity; | |
559 | struct nvm_id_group *grp = &id->groups[0]; | |
8e79b5cb | 560 | struct nvm_geo *geo = &dev->geo; |
7f7c5d03 | 561 | int ret; |
cd9e9808 | 562 | |
8e79b5cb JG |
563 | /* Whole device values */ |
564 | geo->nr_chnls = grp->num_ch; | |
565 | geo->luns_per_chnl = grp->num_lun; | |
566 | ||
567 | /* Generic device values */ | |
568 | geo->pgs_per_blk = grp->num_pg; | |
569 | geo->blks_per_lun = grp->num_blk; | |
570 | geo->nr_planes = grp->num_pln; | |
571 | geo->fpg_size = grp->fpg_sz; | |
572 | geo->pfpg_size = grp->fpg_sz * grp->num_pln; | |
573 | geo->sec_size = grp->csecs; | |
574 | geo->oob_size = grp->sos; | |
575 | geo->sec_per_pg = grp->fpg_sz / grp->csecs; | |
576 | geo->mccap = grp->mccap; | |
577 | memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); | |
578 | ||
579 | geo->plane_mode = NVM_PLANE_SINGLE; | |
580 | geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size; | |
cd9e9808 MB |
581 | |
582 | if (grp->mpos & 0x020202) | |
8e79b5cb | 583 | geo->plane_mode = NVM_PLANE_DOUBLE; |
cd9e9808 | 584 | if (grp->mpos & 0x040404) |
8e79b5cb | 585 | geo->plane_mode = NVM_PLANE_QUAD; |
cd9e9808 | 586 | |
7f7c5d03 MB |
587 | if (grp->mtype != 0) { |
588 | pr_err("nvm: memory type not supported\n"); | |
589 | return -EINVAL; | |
590 | } | |
591 | ||
cd9e9808 | 592 | /* calculated values */ |
8e79b5cb JG |
593 | geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes; |
594 | geo->sec_per_blk = geo->sec_per_pl * geo->pgs_per_blk; | |
595 | geo->sec_per_lun = geo->sec_per_blk * geo->blks_per_lun; | |
596 | geo->nr_luns = geo->luns_per_chnl * geo->nr_chnls; | |
cd9e9808 | 597 | |
8e79b5cb JG |
598 | dev->total_secs = geo->nr_luns * geo->sec_per_lun; |
599 | dev->lun_map = kcalloc(BITS_TO_LONGS(geo->nr_luns), | |
da1e2849 WT |
600 | sizeof(unsigned long), GFP_KERNEL); |
601 | if (!dev->lun_map) | |
602 | return -ENOMEM; | |
7f7c5d03 MB |
603 | |
604 | switch (grp->fmtype) { | |
605 | case NVM_ID_FMTYPE_SLC: | |
606 | if (nvm_init_slc_tbl(dev, grp)) { | |
607 | ret = -ENOMEM; | |
608 | goto err_fmtype; | |
609 | } | |
610 | break; | |
611 | case NVM_ID_FMTYPE_MLC: | |
612 | if (nvm_init_mlc_tbl(dev, grp)) { | |
613 | ret = -ENOMEM; | |
614 | goto err_fmtype; | |
615 | } | |
616 | break; | |
617 | default: | |
618 | pr_err("nvm: flash type not supported\n"); | |
619 | ret = -EINVAL; | |
620 | goto err_fmtype; | |
621 | } | |
622 | ||
e3eb3799 | 623 | mutex_init(&dev->mlock); |
4c9dacb8 | 624 | spin_lock_init(&dev->lock); |
cd9e9808 | 625 | |
8e79b5cb | 626 | blk_queue_logical_block_size(dev->q, geo->sec_size); |
ac81bfa9 | 627 | |
cd9e9808 | 628 | return 0; |
7f7c5d03 MB |
629 | err_fmtype: |
630 | kfree(dev->lun_map); | |
631 | return ret; | |
cd9e9808 MB |
632 | } |
633 | ||
976bdfca MB |
634 | static void nvm_free_mgr(struct nvm_dev *dev) |
635 | { | |
976bdfca MB |
636 | if (!dev->mt) |
637 | return; | |
638 | ||
976bdfca MB |
639 | dev->mt->unregister_mgr(dev); |
640 | dev->mt = NULL; | |
641 | } | |
642 | ||
40267efd | 643 | void nvm_free(struct nvm_dev *dev) |
cd9e9808 MB |
644 | { |
645 | if (!dev) | |
646 | return; | |
647 | ||
976bdfca | 648 | nvm_free_mgr(dev); |
ca5927e7 | 649 | |
40267efd SL |
650 | if (dev->dma_pool) |
651 | dev->ops->destroy_dma_pool(dev->dma_pool); | |
652 | ||
ca5927e7 | 653 | kfree(dev->lptbl); |
7f7c5d03 | 654 | kfree(dev->lun_map); |
40267efd | 655 | kfree(dev); |
cd9e9808 MB |
656 | } |
657 | ||
658 | static int nvm_init(struct nvm_dev *dev) | |
659 | { | |
8e79b5cb | 660 | struct nvm_geo *geo = &dev->geo; |
480fc0db | 661 | int ret = -EINVAL; |
cd9e9808 MB |
662 | |
663 | if (!dev->q || !dev->ops) | |
480fc0db | 664 | return ret; |
cd9e9808 | 665 | |
16f26c3a | 666 | if (dev->ops->identity(dev, &dev->identity)) { |
cd9e9808 | 667 | pr_err("nvm: device could not be identified\n"); |
cd9e9808 MB |
668 | goto err; |
669 | } | |
670 | ||
671 | pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n", | |
672 | dev->identity.ver_id, dev->identity.vmnt, | |
673 | dev->identity.cgrps); | |
674 | ||
675 | if (dev->identity.ver_id != 1) { | |
676 | pr_err("nvm: device not supported by kernel."); | |
677 | goto err; | |
678 | } | |
679 | ||
680 | if (dev->identity.cgrps != 1) { | |
681 | pr_err("nvm: only one group configuration supported."); | |
682 | goto err; | |
683 | } | |
684 | ||
685 | ret = nvm_core_init(dev); | |
686 | if (ret) { | |
687 | pr_err("nvm: could not initialize core structures.\n"); | |
688 | goto err; | |
689 | } | |
690 | ||
cd9e9808 | 691 | pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", |
8e79b5cb JG |
692 | dev->name, geo->sec_per_pg, geo->nr_planes, |
693 | geo->pgs_per_blk, geo->blks_per_lun, | |
694 | geo->nr_luns, geo->nr_chnls); | |
cd9e9808 MB |
695 | return 0; |
696 | err: | |
cd9e9808 MB |
697 | pr_err("nvm: failed to initialize nvm\n"); |
698 | return ret; | |
699 | } | |
700 | ||
b0b4e09c | 701 | struct nvm_dev *nvm_alloc_dev(int node) |
cd9e9808 | 702 | { |
b0b4e09c | 703 | return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node); |
cd9e9808 | 704 | } |
b0b4e09c | 705 | EXPORT_SYMBOL(nvm_alloc_dev); |
cd9e9808 | 706 | |
b0b4e09c | 707 | int nvm_register(struct nvm_dev *dev) |
cd9e9808 | 708 | { |
cd9e9808 MB |
709 | int ret; |
710 | ||
cd9e9808 MB |
711 | ret = nvm_init(dev); |
712 | if (ret) | |
713 | goto err_init; | |
714 | ||
d160147b WT |
715 | if (dev->ops->max_phys_sect > 256) { |
716 | pr_info("nvm: max sectors supported is 256.\n"); | |
717 | ret = -EINVAL; | |
718 | goto err_init; | |
719 | } | |
720 | ||
cd9e9808 | 721 | if (dev->ops->max_phys_sect > 1) { |
75b85649 JG |
722 | dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist"); |
723 | if (!dev->dma_pool) { | |
724 | pr_err("nvm: could not create dma pool\n"); | |
93e70c1f MB |
725 | ret = -ENOMEM; |
726 | goto err_init; | |
cd9e9808 | 727 | } |
cd9e9808 MB |
728 | } |
729 | ||
bf643185 MB |
730 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
731 | ret = nvm_get_sysblock(dev, &dev->sb); | |
732 | if (!ret) | |
733 | pr_err("nvm: device not initialized.\n"); | |
734 | else if (ret < 0) | |
735 | pr_err("nvm: err (%d) on device initialization\n", ret); | |
736 | } | |
b7692076 | 737 | |
762796bc | 738 | /* register device with a supported media manager */ |
edad2e66 | 739 | down_write(&nvm_lock); |
b7692076 MB |
740 | if (ret > 0) |
741 | dev->mt = nvm_init_mgr(dev); | |
edad2e66 MB |
742 | list_add(&dev->devices, &nvm_devices); |
743 | up_write(&nvm_lock); | |
744 | ||
cd9e9808 MB |
745 | return 0; |
746 | err_init: | |
da1e2849 | 747 | kfree(dev->lun_map); |
cd9e9808 MB |
748 | return ret; |
749 | } | |
750 | EXPORT_SYMBOL(nvm_register); | |
751 | ||
b0b4e09c | 752 | void nvm_unregister(struct nvm_dev *dev) |
cd9e9808 | 753 | { |
d0a712ce | 754 | down_write(&nvm_lock); |
cd9e9808 MB |
755 | list_del(&dev->devices); |
756 | up_write(&nvm_lock); | |
c1480ad5 | 757 | |
3dc87dd0 | 758 | nvm_free(dev); |
cd9e9808 MB |
759 | } |
760 | EXPORT_SYMBOL(nvm_unregister); | |
761 | ||
cd9e9808 MB |
762 | static int __nvm_configure_create(struct nvm_ioctl_create *create) |
763 | { | |
764 | struct nvm_dev *dev; | |
765 | struct nvm_ioctl_create_simple *s; | |
766 | ||
d0a712ce | 767 | down_write(&nvm_lock); |
cd9e9808 | 768 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 769 | up_write(&nvm_lock); |
b76eb20b | 770 | |
cd9e9808 MB |
771 | if (!dev) { |
772 | pr_err("nvm: device not found\n"); | |
773 | return -EINVAL; | |
774 | } | |
775 | ||
b76eb20b MB |
776 | if (!dev->mt) { |
777 | pr_info("nvm: device has no media manager registered.\n"); | |
778 | return -ENODEV; | |
779 | } | |
780 | ||
cd9e9808 MB |
781 | if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) { |
782 | pr_err("nvm: config type not valid\n"); | |
783 | return -EINVAL; | |
784 | } | |
785 | s = &create->conf.s; | |
786 | ||
8e79b5cb | 787 | if (s->lun_begin > s->lun_end || s->lun_end > dev->geo.nr_luns) { |
cd9e9808 | 788 | pr_err("nvm: lun out of bound (%u:%u > %u)\n", |
8e79b5cb | 789 | s->lun_begin, s->lun_end, dev->geo.nr_luns); |
cd9e9808 MB |
790 | return -EINVAL; |
791 | } | |
792 | ||
b76eb20b | 793 | return dev->mt->create_tgt(dev, create); |
cd9e9808 MB |
794 | } |
795 | ||
cd9e9808 MB |
796 | static long nvm_ioctl_info(struct file *file, void __user *arg) |
797 | { | |
798 | struct nvm_ioctl_info *info; | |
799 | struct nvm_tgt_type *tt; | |
800 | int tgt_iter = 0; | |
801 | ||
802 | if (!capable(CAP_SYS_ADMIN)) | |
803 | return -EPERM; | |
804 | ||
805 | info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); | |
806 | if (IS_ERR(info)) | |
807 | return -EFAULT; | |
808 | ||
809 | info->version[0] = NVM_VERSION_MAJOR; | |
810 | info->version[1] = NVM_VERSION_MINOR; | |
811 | info->version[2] = NVM_VERSION_PATCH; | |
812 | ||
813 | down_write(&nvm_lock); | |
6063fe39 | 814 | list_for_each_entry(tt, &nvm_tgt_types, list) { |
cd9e9808 MB |
815 | struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; |
816 | ||
817 | tgt->version[0] = tt->version[0]; | |
818 | tgt->version[1] = tt->version[1]; | |
819 | tgt->version[2] = tt->version[2]; | |
820 | strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); | |
821 | ||
822 | tgt_iter++; | |
823 | } | |
824 | ||
825 | info->tgtsize = tgt_iter; | |
826 | up_write(&nvm_lock); | |
827 | ||
76e25081 SM |
828 | if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { |
829 | kfree(info); | |
cd9e9808 | 830 | return -EFAULT; |
76e25081 | 831 | } |
cd9e9808 MB |
832 | |
833 | kfree(info); | |
834 | return 0; | |
835 | } | |
836 | ||
837 | static long nvm_ioctl_get_devices(struct file *file, void __user *arg) | |
838 | { | |
839 | struct nvm_ioctl_get_devices *devices; | |
840 | struct nvm_dev *dev; | |
841 | int i = 0; | |
842 | ||
843 | if (!capable(CAP_SYS_ADMIN)) | |
844 | return -EPERM; | |
845 | ||
846 | devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); | |
847 | if (!devices) | |
848 | return -ENOMEM; | |
849 | ||
850 | down_write(&nvm_lock); | |
851 | list_for_each_entry(dev, &nvm_devices, devices) { | |
852 | struct nvm_ioctl_device_info *info = &devices->info[i]; | |
853 | ||
854 | sprintf(info->devname, "%s", dev->name); | |
855 | if (dev->mt) { | |
856 | info->bmversion[0] = dev->mt->version[0]; | |
857 | info->bmversion[1] = dev->mt->version[1]; | |
858 | info->bmversion[2] = dev->mt->version[2]; | |
859 | sprintf(info->bmname, "%s", dev->mt->name); | |
860 | } else { | |
861 | sprintf(info->bmname, "none"); | |
862 | } | |
863 | ||
864 | i++; | |
865 | if (i > 31) { | |
866 | pr_err("nvm: max 31 devices can be reported.\n"); | |
867 | break; | |
868 | } | |
869 | } | |
870 | up_write(&nvm_lock); | |
871 | ||
872 | devices->nr_devices = i; | |
873 | ||
76e25081 SM |
874 | if (copy_to_user(arg, devices, |
875 | sizeof(struct nvm_ioctl_get_devices))) { | |
876 | kfree(devices); | |
cd9e9808 | 877 | return -EFAULT; |
76e25081 | 878 | } |
cd9e9808 MB |
879 | |
880 | kfree(devices); | |
881 | return 0; | |
882 | } | |
883 | ||
884 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
885 | { | |
886 | struct nvm_ioctl_create create; | |
887 | ||
888 | if (!capable(CAP_SYS_ADMIN)) | |
889 | return -EPERM; | |
890 | ||
891 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) | |
892 | return -EFAULT; | |
893 | ||
894 | create.dev[DISK_NAME_LEN - 1] = '\0'; | |
895 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
896 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
897 | ||
898 | if (create.flags != 0) { | |
899 | pr_err("nvm: no flags supported\n"); | |
900 | return -EINVAL; | |
901 | } | |
902 | ||
903 | return __nvm_configure_create(&create); | |
904 | } | |
905 | ||
906 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
907 | { | |
908 | struct nvm_ioctl_remove remove; | |
b76eb20b MB |
909 | struct nvm_dev *dev; |
910 | int ret = 0; | |
cd9e9808 MB |
911 | |
912 | if (!capable(CAP_SYS_ADMIN)) | |
913 | return -EPERM; | |
914 | ||
915 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) | |
916 | return -EFAULT; | |
917 | ||
918 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
919 | ||
920 | if (remove.flags != 0) { | |
921 | pr_err("nvm: no flags supported\n"); | |
922 | return -EINVAL; | |
923 | } | |
924 | ||
b76eb20b MB |
925 | list_for_each_entry(dev, &nvm_devices, devices) { |
926 | ret = dev->mt->remove_tgt(dev, &remove); | |
927 | if (!ret) | |
928 | break; | |
929 | } | |
930 | ||
931 | return ret; | |
cd9e9808 MB |
932 | } |
933 | ||
55696154 MB |
934 | static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info) |
935 | { | |
936 | info->seqnr = 1; | |
937 | info->erase_cnt = 0; | |
938 | info->version = 1; | |
939 | } | |
940 | ||
941 | static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init) | |
942 | { | |
943 | struct nvm_dev *dev; | |
944 | struct nvm_sb_info info; | |
b7692076 | 945 | int ret; |
55696154 MB |
946 | |
947 | down_write(&nvm_lock); | |
948 | dev = nvm_find_nvm_dev(init->dev); | |
949 | up_write(&nvm_lock); | |
950 | if (!dev) { | |
951 | pr_err("nvm: device not found\n"); | |
952 | return -EINVAL; | |
953 | } | |
954 | ||
955 | nvm_setup_nvm_sb_info(&info); | |
956 | ||
957 | strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN); | |
958 | info.fs_ppa.ppa = -1; | |
959 | ||
bf643185 MB |
960 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
961 | ret = nvm_init_sysblock(dev, &info); | |
962 | if (ret) | |
963 | return ret; | |
964 | } | |
b7692076 MB |
965 | |
966 | memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info)); | |
967 | ||
968 | down_write(&nvm_lock); | |
969 | dev->mt = nvm_init_mgr(dev); | |
970 | up_write(&nvm_lock); | |
971 | ||
972 | return 0; | |
55696154 MB |
973 | } |
974 | ||
975 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) | |
976 | { | |
977 | struct nvm_ioctl_dev_init init; | |
978 | ||
979 | if (!capable(CAP_SYS_ADMIN)) | |
980 | return -EPERM; | |
981 | ||
982 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) | |
983 | return -EFAULT; | |
984 | ||
985 | if (init.flags != 0) { | |
986 | pr_err("nvm: no flags supported\n"); | |
987 | return -EINVAL; | |
988 | } | |
989 | ||
990 | init.dev[DISK_NAME_LEN - 1] = '\0'; | |
991 | ||
992 | return __nvm_ioctl_dev_init(&init); | |
993 | } | |
994 | ||
8b4970c4 MB |
995 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
996 | { | |
997 | struct nvm_ioctl_dev_factory fact; | |
998 | struct nvm_dev *dev; | |
999 | ||
1000 | if (!capable(CAP_SYS_ADMIN)) | |
1001 | return -EPERM; | |
1002 | ||
1003 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) | |
1004 | return -EFAULT; | |
1005 | ||
1006 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1007 | ||
1008 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1009 | return -EINVAL; | |
1010 | ||
1011 | down_write(&nvm_lock); | |
1012 | dev = nvm_find_nvm_dev(fact.dev); | |
1013 | up_write(&nvm_lock); | |
1014 | if (!dev) { | |
1015 | pr_err("nvm: device not found\n"); | |
1016 | return -EINVAL; | |
1017 | } | |
1018 | ||
976bdfca | 1019 | nvm_free_mgr(dev); |
8b4970c4 | 1020 | |
bf643185 MB |
1021 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) |
1022 | return nvm_dev_factory(dev, fact.flags); | |
1023 | ||
1024 | return 0; | |
8b4970c4 MB |
1025 | } |
1026 | ||
cd9e9808 MB |
1027 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1028 | { | |
1029 | void __user *argp = (void __user *)arg; | |
1030 | ||
1031 | switch (cmd) { | |
1032 | case NVM_INFO: | |
1033 | return nvm_ioctl_info(file, argp); | |
1034 | case NVM_GET_DEVICES: | |
1035 | return nvm_ioctl_get_devices(file, argp); | |
1036 | case NVM_DEV_CREATE: | |
1037 | return nvm_ioctl_dev_create(file, argp); | |
1038 | case NVM_DEV_REMOVE: | |
1039 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1040 | case NVM_DEV_INIT: |
1041 | return nvm_ioctl_dev_init(file, argp); | |
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1042 | case NVM_DEV_FACTORY: |
1043 | return nvm_ioctl_dev_factory(file, argp); | |
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1044 | } |
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | static const struct file_operations _ctl_fops = { | |
1049 | .open = nonseekable_open, | |
1050 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1051 | .owner = THIS_MODULE, | |
1052 | .llseek = noop_llseek, | |
1053 | }; | |
1054 | ||
1055 | static struct miscdevice _nvm_misc = { | |
1056 | .minor = MISC_DYNAMIC_MINOR, | |
1057 | .name = "lightnvm", | |
1058 | .nodename = "lightnvm/control", | |
1059 | .fops = &_ctl_fops, | |
1060 | }; | |
d6a38c0b | 1061 | module_misc_device(_nvm_misc); |
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1062 | |
1063 | MODULE_ALIAS_MISCDEV(MISC_DYNAMIC_MINOR); | |
1064 | ||
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1065 | MODULE_AUTHOR("Matias Bjorling <m@bjorling.me>"); |
1066 | MODULE_LICENSE("GPL v2"); | |
1067 | MODULE_VERSION("0.1"); |