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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 | ||
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> | |
91276162 | 30 | #include <linux/sched/sysctl.h> |
cd9e9808 MB |
31 | #include <uapi/linux/lightnvm.h> |
32 | ||
6063fe39 | 33 | static LIST_HEAD(nvm_tgt_types); |
cd9e9808 MB |
34 | static LIST_HEAD(nvm_mgrs); |
35 | static LIST_HEAD(nvm_devices); | |
6f8645cb | 36 | static LIST_HEAD(nvm_targets); |
cd9e9808 MB |
37 | static DECLARE_RWSEM(nvm_lock); |
38 | ||
6f8645cb SL |
39 | static struct nvm_target *nvm_find_target(const char *name) |
40 | { | |
41 | struct nvm_target *tgt; | |
42 | ||
43 | list_for_each_entry(tgt, &nvm_targets, list) | |
44 | if (!strcmp(name, tgt->disk->disk_name)) | |
45 | return tgt; | |
46 | ||
47 | return NULL; | |
48 | } | |
49 | ||
cd9e9808 MB |
50 | static struct nvm_tgt_type *nvm_find_target_type(const char *name) |
51 | { | |
52 | struct nvm_tgt_type *tt; | |
53 | ||
6063fe39 | 54 | list_for_each_entry(tt, &nvm_tgt_types, list) |
cd9e9808 MB |
55 | if (!strcmp(name, tt->name)) |
56 | return tt; | |
57 | ||
58 | return NULL; | |
59 | } | |
60 | ||
6063fe39 | 61 | int nvm_register_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
62 | { |
63 | int ret = 0; | |
64 | ||
65 | down_write(&nvm_lock); | |
66 | if (nvm_find_target_type(tt->name)) | |
67 | ret = -EEXIST; | |
68 | else | |
6063fe39 | 69 | list_add(&tt->list, &nvm_tgt_types); |
cd9e9808 MB |
70 | up_write(&nvm_lock); |
71 | ||
72 | return ret; | |
73 | } | |
6063fe39 | 74 | EXPORT_SYMBOL(nvm_register_tgt_type); |
cd9e9808 | 75 | |
6063fe39 | 76 | void nvm_unregister_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
77 | { |
78 | if (!tt) | |
79 | return; | |
80 | ||
81 | down_write(&nvm_lock); | |
82 | list_del(&tt->list); | |
83 | up_write(&nvm_lock); | |
84 | } | |
6063fe39 | 85 | EXPORT_SYMBOL(nvm_unregister_tgt_type); |
cd9e9808 MB |
86 | |
87 | void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, | |
88 | dma_addr_t *dma_handler) | |
89 | { | |
16f26c3a | 90 | return dev->ops->dev_dma_alloc(dev, dev->ppalist_pool, mem_flags, |
cd9e9808 MB |
91 | dma_handler); |
92 | } | |
93 | EXPORT_SYMBOL(nvm_dev_dma_alloc); | |
94 | ||
95 | void nvm_dev_dma_free(struct nvm_dev *dev, void *ppa_list, | |
96 | dma_addr_t dma_handler) | |
97 | { | |
98 | dev->ops->dev_dma_free(dev->ppalist_pool, ppa_list, dma_handler); | |
99 | } | |
100 | EXPORT_SYMBOL(nvm_dev_dma_free); | |
101 | ||
102 | static struct nvmm_type *nvm_find_mgr_type(const char *name) | |
103 | { | |
104 | struct nvmm_type *mt; | |
105 | ||
106 | list_for_each_entry(mt, &nvm_mgrs, list) | |
107 | if (!strcmp(name, mt->name)) | |
108 | return mt; | |
109 | ||
110 | return NULL; | |
111 | } | |
112 | ||
762796bc MB |
113 | struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev) |
114 | { | |
115 | struct nvmm_type *mt; | |
116 | int ret; | |
117 | ||
118 | lockdep_assert_held(&nvm_lock); | |
119 | ||
120 | list_for_each_entry(mt, &nvm_mgrs, list) { | |
b7692076 MB |
121 | if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN)) |
122 | continue; | |
123 | ||
762796bc MB |
124 | ret = mt->register_mgr(dev); |
125 | if (ret < 0) { | |
126 | pr_err("nvm: media mgr failed to init (%d) on dev %s\n", | |
127 | ret, dev->name); | |
128 | return NULL; /* initialization failed */ | |
129 | } else if (ret > 0) | |
130 | return mt; | |
131 | } | |
132 | ||
133 | return NULL; | |
134 | } | |
135 | ||
cd9e9808 MB |
136 | int nvm_register_mgr(struct nvmm_type *mt) |
137 | { | |
762796bc | 138 | struct nvm_dev *dev; |
cd9e9808 MB |
139 | int ret = 0; |
140 | ||
141 | down_write(&nvm_lock); | |
762796bc | 142 | if (nvm_find_mgr_type(mt->name)) { |
cd9e9808 | 143 | ret = -EEXIST; |
762796bc MB |
144 | goto finish; |
145 | } else { | |
cd9e9808 | 146 | list_add(&mt->list, &nvm_mgrs); |
762796bc MB |
147 | } |
148 | ||
149 | /* try to register media mgr if any device have none configured */ | |
150 | list_for_each_entry(dev, &nvm_devices, devices) { | |
151 | if (dev->mt) | |
152 | continue; | |
153 | ||
154 | dev->mt = nvm_init_mgr(dev); | |
155 | } | |
156 | finish: | |
cd9e9808 MB |
157 | up_write(&nvm_lock); |
158 | ||
159 | return ret; | |
160 | } | |
161 | EXPORT_SYMBOL(nvm_register_mgr); | |
162 | ||
163 | void nvm_unregister_mgr(struct nvmm_type *mt) | |
164 | { | |
165 | if (!mt) | |
166 | return; | |
167 | ||
168 | down_write(&nvm_lock); | |
169 | list_del(&mt->list); | |
170 | up_write(&nvm_lock); | |
171 | } | |
172 | EXPORT_SYMBOL(nvm_unregister_mgr); | |
173 | ||
174 | static struct nvm_dev *nvm_find_nvm_dev(const char *name) | |
175 | { | |
176 | struct nvm_dev *dev; | |
177 | ||
178 | list_for_each_entry(dev, &nvm_devices, devices) | |
179 | if (!strcmp(name, dev->name)) | |
180 | return dev; | |
181 | ||
182 | return NULL; | |
183 | } | |
184 | ||
ff0e498b JG |
185 | struct nvm_block *nvm_get_blk_unlocked(struct nvm_dev *dev, struct nvm_lun *lun, |
186 | unsigned long flags) | |
187 | { | |
188 | return dev->mt->get_blk_unlocked(dev, lun, flags); | |
189 | } | |
190 | EXPORT_SYMBOL(nvm_get_blk_unlocked); | |
191 | ||
192 | /* Assumes that all valid pages have already been moved on release to bm */ | |
193 | void nvm_put_blk_unlocked(struct nvm_dev *dev, struct nvm_block *blk) | |
194 | { | |
195 | return dev->mt->put_blk_unlocked(dev, blk); | |
196 | } | |
197 | EXPORT_SYMBOL(nvm_put_blk_unlocked); | |
198 | ||
cd9e9808 MB |
199 | struct nvm_block *nvm_get_blk(struct nvm_dev *dev, struct nvm_lun *lun, |
200 | unsigned long flags) | |
201 | { | |
202 | return dev->mt->get_blk(dev, lun, flags); | |
203 | } | |
204 | EXPORT_SYMBOL(nvm_get_blk); | |
205 | ||
206 | /* Assumes that all valid pages have already been moved on release to bm */ | |
207 | void nvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk) | |
208 | { | |
209 | return dev->mt->put_blk(dev, blk); | |
210 | } | |
211 | EXPORT_SYMBOL(nvm_put_blk); | |
212 | ||
213 | int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) | |
214 | { | |
215 | return dev->mt->submit_io(dev, rqd); | |
216 | } | |
217 | EXPORT_SYMBOL(nvm_submit_io); | |
218 | ||
219 | int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk) | |
220 | { | |
221 | return dev->mt->erase_blk(dev, blk, 0); | |
222 | } | |
223 | EXPORT_SYMBOL(nvm_erase_blk); | |
224 | ||
069368e9 MB |
225 | void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd) |
226 | { | |
227 | int i; | |
228 | ||
229 | if (rqd->nr_pages > 1) { | |
230 | for (i = 0; i < rqd->nr_pages; i++) | |
231 | rqd->ppa_list[i] = dev_to_generic_addr(dev, | |
232 | rqd->ppa_list[i]); | |
233 | } else { | |
234 | rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr); | |
235 | } | |
236 | } | |
237 | EXPORT_SYMBOL(nvm_addr_to_generic_mode); | |
238 | ||
239 | void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd) | |
240 | { | |
241 | int i; | |
242 | ||
243 | if (rqd->nr_pages > 1) { | |
244 | for (i = 0; i < rqd->nr_pages; i++) | |
245 | rqd->ppa_list[i] = generic_to_dev_addr(dev, | |
246 | rqd->ppa_list[i]); | |
247 | } else { | |
248 | rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); | |
249 | } | |
250 | } | |
251 | EXPORT_SYMBOL(nvm_generic_to_addr_mode); | |
252 | ||
abd805ec MB |
253 | int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, |
254 | struct ppa_addr *ppas, int nr_ppas) | |
069368e9 | 255 | { |
abd805ec MB |
256 | int i, plane_cnt, pl_idx; |
257 | ||
258 | if (dev->plane_mode == NVM_PLANE_SINGLE && nr_ppas == 1) { | |
259 | rqd->nr_pages = 1; | |
260 | rqd->ppa_addr = ppas[0]; | |
069368e9 | 261 | |
069368e9 | 262 | return 0; |
abd805ec | 263 | } |
069368e9 | 264 | |
d5bdec8d | 265 | plane_cnt = dev->plane_mode; |
abd805ec | 266 | rqd->nr_pages = plane_cnt * nr_ppas; |
069368e9 | 267 | |
abd805ec MB |
268 | if (dev->ops->max_phys_sect < rqd->nr_pages) |
269 | return -EINVAL; | |
270 | ||
271 | rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); | |
272 | if (!rqd->ppa_list) { | |
273 | pr_err("nvm: failed to allocate dma memory\n"); | |
274 | return -ENOMEM; | |
275 | } | |
276 | ||
556755e9 MB |
277 | for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { |
278 | for (i = 0; i < nr_ppas; i++) { | |
abd805ec | 279 | ppas[i].g.pl = pl_idx; |
556755e9 | 280 | rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppas[i]; |
069368e9 MB |
281 | } |
282 | } | |
283 | ||
abd805ec MB |
284 | return 0; |
285 | } | |
286 | EXPORT_SYMBOL(nvm_set_rqd_ppalist); | |
287 | ||
288 | void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd) | |
289 | { | |
290 | if (!rqd->ppa_list) | |
291 | return; | |
292 | ||
293 | nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list); | |
294 | } | |
295 | EXPORT_SYMBOL(nvm_free_rqd_ppalist); | |
296 | ||
81e681d3 | 297 | int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas) |
abd805ec MB |
298 | { |
299 | struct nvm_rq rqd; | |
300 | int ret; | |
301 | ||
302 | if (!dev->ops->erase_block) | |
303 | return 0; | |
304 | ||
305 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
306 | ||
81e681d3 | 307 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas); |
abd805ec MB |
308 | if (ret) |
309 | return ret; | |
310 | ||
069368e9 MB |
311 | nvm_generic_to_addr_mode(dev, &rqd); |
312 | ||
313 | ret = dev->ops->erase_block(dev, &rqd); | |
314 | ||
abd805ec | 315 | nvm_free_rqd_ppalist(dev, &rqd); |
069368e9 MB |
316 | |
317 | return ret; | |
318 | } | |
319 | EXPORT_SYMBOL(nvm_erase_ppa); | |
320 | ||
91276162 MB |
321 | void nvm_end_io(struct nvm_rq *rqd, int error) |
322 | { | |
72d256ec MB |
323 | rqd->error = error; |
324 | rqd->end_io(rqd); | |
91276162 MB |
325 | } |
326 | EXPORT_SYMBOL(nvm_end_io); | |
327 | ||
09719b62 | 328 | static void nvm_end_io_sync(struct nvm_rq *rqd) |
91276162 MB |
329 | { |
330 | struct completion *waiting = rqd->wait; | |
331 | ||
332 | rqd->wait = NULL; | |
333 | ||
334 | complete(waiting); | |
335 | } | |
336 | ||
1145e635 MB |
337 | int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode, |
338 | int flags, void *buf, int len) | |
09719b62 MB |
339 | { |
340 | DECLARE_COMPLETION_ONSTACK(wait); | |
09719b62 MB |
341 | struct bio *bio; |
342 | int ret; | |
343 | unsigned long hang_check; | |
344 | ||
345 | bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL); | |
346 | if (IS_ERR_OR_NULL(bio)) | |
347 | return -ENOMEM; | |
348 | ||
1145e635 | 349 | nvm_generic_to_addr_mode(dev, rqd); |
09719b62 | 350 | |
1145e635 MB |
351 | rqd->dev = dev; |
352 | rqd->opcode = opcode; | |
353 | rqd->flags = flags; | |
354 | rqd->bio = bio; | |
355 | rqd->wait = &wait; | |
356 | rqd->end_io = nvm_end_io_sync; | |
09719b62 | 357 | |
1145e635 | 358 | ret = dev->ops->submit_io(dev, rqd); |
ecfb40c6 | 359 | if (ret) { |
ecfb40c6 MB |
360 | bio_put(bio); |
361 | return ret; | |
362 | } | |
09719b62 MB |
363 | |
364 | /* Prevent hang_check timer from firing at us during very long I/O */ | |
365 | hang_check = sysctl_hung_task_timeout_secs; | |
366 | if (hang_check) | |
367 | while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2))); | |
368 | else | |
369 | wait_for_completion_io(&wait); | |
370 | ||
1145e635 MB |
371 | return rqd->error; |
372 | } | |
373 | ||
374 | /** | |
375 | * nvm_submit_ppa_list - submit user-defined ppa list to device. The user must | |
376 | * take to free ppa list if necessary. | |
377 | * @dev: device | |
378 | * @ppa_list: user created ppa_list | |
379 | * @nr_ppas: length of ppa_list | |
380 | * @opcode: device opcode | |
381 | * @flags: device flags | |
382 | * @buf: data buffer | |
383 | * @len: data buffer length | |
384 | */ | |
385 | int nvm_submit_ppa_list(struct nvm_dev *dev, struct ppa_addr *ppa_list, | |
386 | int nr_ppas, int opcode, int flags, void *buf, int len) | |
387 | { | |
388 | struct nvm_rq rqd; | |
389 | ||
390 | if (dev->ops->max_phys_sect < nr_ppas) | |
391 | return -EINVAL; | |
392 | ||
393 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
394 | ||
395 | rqd.nr_pages = nr_ppas; | |
396 | if (nr_ppas > 1) | |
397 | rqd.ppa_list = ppa_list; | |
398 | else | |
399 | rqd.ppa_addr = ppa_list[0]; | |
400 | ||
401 | return __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); | |
402 | } | |
403 | EXPORT_SYMBOL(nvm_submit_ppa_list); | |
404 | ||
405 | /** | |
406 | * nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded | |
407 | * as single, dual, quad plane PPAs depending on device type. | |
408 | * @dev: device | |
409 | * @ppa: user created ppa_list | |
410 | * @nr_ppas: length of ppa_list | |
411 | * @opcode: device opcode | |
412 | * @flags: device flags | |
413 | * @buf: data buffer | |
414 | * @len: data buffer length | |
415 | */ | |
416 | int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas, | |
417 | int opcode, int flags, void *buf, int len) | |
418 | { | |
419 | struct nvm_rq rqd; | |
420 | int ret; | |
421 | ||
422 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
423 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas); | |
424 | if (ret) | |
425 | return ret; | |
426 | ||
427 | ret = __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); | |
428 | ||
09719b62 MB |
429 | nvm_free_rqd_ppalist(dev, &rqd); |
430 | ||
1145e635 | 431 | return ret; |
09719b62 MB |
432 | } |
433 | EXPORT_SYMBOL(nvm_submit_ppa); | |
434 | ||
22e8c976 MB |
435 | /* |
436 | * folds a bad block list from its plane representation to its virtual | |
437 | * block representation. The fold is done in place and reduced size is | |
438 | * returned. | |
439 | * | |
440 | * If any of the planes status are bad or grown bad block, the virtual block | |
441 | * is marked bad. If not bad, the first plane state acts as the block state. | |
442 | */ | |
443 | int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) | |
444 | { | |
445 | int blk, offset, pl, blktype; | |
446 | ||
447 | if (nr_blks != dev->blks_per_lun * dev->plane_mode) | |
448 | return -EINVAL; | |
449 | ||
450 | for (blk = 0; blk < dev->blks_per_lun; blk++) { | |
451 | offset = blk * dev->plane_mode; | |
452 | blktype = blks[offset]; | |
453 | ||
454 | /* Bad blocks on any planes take precedence over other types */ | |
455 | for (pl = 0; pl < dev->plane_mode; pl++) { | |
456 | if (blks[offset + pl] & | |
457 | (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { | |
458 | blktype = blks[offset + pl]; | |
459 | break; | |
460 | } | |
461 | } | |
462 | ||
463 | blks[blk] = blktype; | |
464 | } | |
465 | ||
466 | return dev->blks_per_lun; | |
467 | } | |
468 | EXPORT_SYMBOL(nvm_bb_tbl_fold); | |
469 | ||
e11903f5 MB |
470 | int nvm_get_bb_tbl(struct nvm_dev *dev, struct ppa_addr ppa, u8 *blks) |
471 | { | |
472 | ppa = generic_to_dev_addr(dev, ppa); | |
473 | ||
474 | return dev->ops->get_bb_tbl(dev, ppa, blks); | |
475 | } | |
476 | EXPORT_SYMBOL(nvm_get_bb_tbl); | |
477 | ||
ca5927e7 MB |
478 | static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) |
479 | { | |
480 | int i; | |
481 | ||
482 | dev->lps_per_blk = dev->pgs_per_blk; | |
483 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
484 | if (!dev->lptbl) | |
485 | return -ENOMEM; | |
486 | ||
487 | /* Just a linear array */ | |
488 | for (i = 0; i < dev->lps_per_blk; i++) | |
489 | dev->lptbl[i] = i; | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) | |
495 | { | |
496 | int i, p; | |
497 | struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc; | |
498 | ||
499 | if (!mlc->num_pairs) | |
500 | return 0; | |
501 | ||
502 | dev->lps_per_blk = mlc->num_pairs; | |
503 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
504 | if (!dev->lptbl) | |
505 | return -ENOMEM; | |
506 | ||
507 | /* The lower page table encoding consists of a list of bytes, where each | |
508 | * has a lower and an upper half. The first half byte maintains the | |
509 | * increment value and every value after is an offset added to the | |
510 | * previous incrementation value */ | |
511 | dev->lptbl[0] = mlc->pairs[0] & 0xF; | |
512 | for (i = 1; i < dev->lps_per_blk; i++) { | |
513 | p = mlc->pairs[i >> 1]; | |
514 | if (i & 0x1) /* upper */ | |
515 | dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4); | |
516 | else /* lower */ | |
517 | dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF); | |
518 | } | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
cd9e9808 MB |
523 | static int nvm_core_init(struct nvm_dev *dev) |
524 | { | |
525 | struct nvm_id *id = &dev->identity; | |
526 | struct nvm_id_group *grp = &id->groups[0]; | |
7f7c5d03 | 527 | int ret; |
cd9e9808 MB |
528 | |
529 | /* device values */ | |
530 | dev->nr_chnls = grp->num_ch; | |
531 | dev->luns_per_chnl = grp->num_lun; | |
532 | dev->pgs_per_blk = grp->num_pg; | |
533 | dev->blks_per_lun = grp->num_blk; | |
534 | dev->nr_planes = grp->num_pln; | |
4891d120 MB |
535 | dev->fpg_size = grp->fpg_sz; |
536 | dev->pfpg_size = grp->fpg_sz * grp->num_pln; | |
cd9e9808 MB |
537 | dev->sec_size = grp->csecs; |
538 | dev->oob_size = grp->sos; | |
539 | dev->sec_per_pg = grp->fpg_sz / grp->csecs; | |
f9a99950 | 540 | dev->mccap = grp->mccap; |
7386af27 | 541 | memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); |
cd9e9808 MB |
542 | |
543 | dev->plane_mode = NVM_PLANE_SINGLE; | |
544 | dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size; | |
545 | ||
546 | if (grp->mpos & 0x020202) | |
547 | dev->plane_mode = NVM_PLANE_DOUBLE; | |
548 | if (grp->mpos & 0x040404) | |
549 | dev->plane_mode = NVM_PLANE_QUAD; | |
550 | ||
7f7c5d03 MB |
551 | if (grp->mtype != 0) { |
552 | pr_err("nvm: memory type not supported\n"); | |
553 | return -EINVAL; | |
554 | } | |
555 | ||
cd9e9808 MB |
556 | /* calculated values */ |
557 | dev->sec_per_pl = dev->sec_per_pg * dev->nr_planes; | |
558 | dev->sec_per_blk = dev->sec_per_pl * dev->pgs_per_blk; | |
559 | dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun; | |
560 | dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls; | |
561 | ||
ed2a92a6 | 562 | dev->total_secs = dev->nr_luns * dev->sec_per_lun; |
da1e2849 WT |
563 | dev->lun_map = kcalloc(BITS_TO_LONGS(dev->nr_luns), |
564 | sizeof(unsigned long), GFP_KERNEL); | |
565 | if (!dev->lun_map) | |
566 | return -ENOMEM; | |
7f7c5d03 MB |
567 | |
568 | switch (grp->fmtype) { | |
569 | case NVM_ID_FMTYPE_SLC: | |
570 | if (nvm_init_slc_tbl(dev, grp)) { | |
571 | ret = -ENOMEM; | |
572 | goto err_fmtype; | |
573 | } | |
574 | break; | |
575 | case NVM_ID_FMTYPE_MLC: | |
576 | if (nvm_init_mlc_tbl(dev, grp)) { | |
577 | ret = -ENOMEM; | |
578 | goto err_fmtype; | |
579 | } | |
580 | break; | |
581 | default: | |
582 | pr_err("nvm: flash type not supported\n"); | |
583 | ret = -EINVAL; | |
584 | goto err_fmtype; | |
585 | } | |
586 | ||
e3eb3799 | 587 | mutex_init(&dev->mlock); |
4c9dacb8 | 588 | spin_lock_init(&dev->lock); |
cd9e9808 MB |
589 | |
590 | return 0; | |
7f7c5d03 MB |
591 | err_fmtype: |
592 | kfree(dev->lun_map); | |
593 | return ret; | |
cd9e9808 MB |
594 | } |
595 | ||
596 | static void nvm_free(struct nvm_dev *dev) | |
597 | { | |
598 | if (!dev) | |
599 | return; | |
600 | ||
601 | if (dev->mt) | |
602 | dev->mt->unregister_mgr(dev); | |
ca5927e7 MB |
603 | |
604 | kfree(dev->lptbl); | |
7f7c5d03 | 605 | kfree(dev->lun_map); |
cd9e9808 MB |
606 | } |
607 | ||
608 | static int nvm_init(struct nvm_dev *dev) | |
609 | { | |
480fc0db | 610 | int ret = -EINVAL; |
cd9e9808 MB |
611 | |
612 | if (!dev->q || !dev->ops) | |
480fc0db | 613 | return ret; |
cd9e9808 | 614 | |
16f26c3a | 615 | if (dev->ops->identity(dev, &dev->identity)) { |
cd9e9808 | 616 | pr_err("nvm: device could not be identified\n"); |
cd9e9808 MB |
617 | goto err; |
618 | } | |
619 | ||
620 | pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n", | |
621 | dev->identity.ver_id, dev->identity.vmnt, | |
622 | dev->identity.cgrps); | |
623 | ||
624 | if (dev->identity.ver_id != 1) { | |
625 | pr_err("nvm: device not supported by kernel."); | |
626 | goto err; | |
627 | } | |
628 | ||
629 | if (dev->identity.cgrps != 1) { | |
630 | pr_err("nvm: only one group configuration supported."); | |
631 | goto err; | |
632 | } | |
633 | ||
634 | ret = nvm_core_init(dev); | |
635 | if (ret) { | |
636 | pr_err("nvm: could not initialize core structures.\n"); | |
637 | goto err; | |
638 | } | |
639 | ||
cd9e9808 MB |
640 | pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", |
641 | dev->name, dev->sec_per_pg, dev->nr_planes, | |
642 | dev->pgs_per_blk, dev->blks_per_lun, dev->nr_luns, | |
643 | dev->nr_chnls); | |
644 | return 0; | |
645 | err: | |
cd9e9808 MB |
646 | pr_err("nvm: failed to initialize nvm\n"); |
647 | return ret; | |
648 | } | |
649 | ||
650 | static void nvm_exit(struct nvm_dev *dev) | |
651 | { | |
652 | if (dev->ppalist_pool) | |
653 | dev->ops->destroy_dma_pool(dev->ppalist_pool); | |
654 | nvm_free(dev); | |
655 | ||
656 | pr_info("nvm: successfully unloaded\n"); | |
657 | } | |
658 | ||
659 | int nvm_register(struct request_queue *q, char *disk_name, | |
660 | struct nvm_dev_ops *ops) | |
661 | { | |
662 | struct nvm_dev *dev; | |
663 | int ret; | |
664 | ||
665 | if (!ops->identity) | |
666 | return -EINVAL; | |
667 | ||
668 | dev = kzalloc(sizeof(struct nvm_dev), GFP_KERNEL); | |
669 | if (!dev) | |
670 | return -ENOMEM; | |
671 | ||
672 | dev->q = q; | |
673 | dev->ops = ops; | |
674 | strncpy(dev->name, disk_name, DISK_NAME_LEN); | |
675 | ||
676 | ret = nvm_init(dev); | |
677 | if (ret) | |
678 | goto err_init; | |
679 | ||
d160147b WT |
680 | if (dev->ops->max_phys_sect > 256) { |
681 | pr_info("nvm: max sectors supported is 256.\n"); | |
682 | ret = -EINVAL; | |
683 | goto err_init; | |
684 | } | |
685 | ||
cd9e9808 | 686 | if (dev->ops->max_phys_sect > 1) { |
16f26c3a | 687 | dev->ppalist_pool = dev->ops->create_dma_pool(dev, "ppalist"); |
cd9e9808 MB |
688 | if (!dev->ppalist_pool) { |
689 | pr_err("nvm: could not create ppa pool\n"); | |
93e70c1f MB |
690 | ret = -ENOMEM; |
691 | goto err_init; | |
cd9e9808 | 692 | } |
cd9e9808 MB |
693 | } |
694 | ||
bf643185 MB |
695 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
696 | ret = nvm_get_sysblock(dev, &dev->sb); | |
697 | if (!ret) | |
698 | pr_err("nvm: device not initialized.\n"); | |
699 | else if (ret < 0) | |
700 | pr_err("nvm: err (%d) on device initialization\n", ret); | |
701 | } | |
b7692076 | 702 | |
762796bc | 703 | /* register device with a supported media manager */ |
edad2e66 | 704 | down_write(&nvm_lock); |
b7692076 MB |
705 | if (ret > 0) |
706 | dev->mt = nvm_init_mgr(dev); | |
edad2e66 MB |
707 | list_add(&dev->devices, &nvm_devices); |
708 | up_write(&nvm_lock); | |
709 | ||
cd9e9808 MB |
710 | return 0; |
711 | err_init: | |
da1e2849 | 712 | kfree(dev->lun_map); |
cd9e9808 MB |
713 | kfree(dev); |
714 | return ret; | |
715 | } | |
716 | EXPORT_SYMBOL(nvm_register); | |
717 | ||
718 | void nvm_unregister(char *disk_name) | |
719 | { | |
d0a712ce | 720 | struct nvm_dev *dev; |
cd9e9808 | 721 | |
d0a712ce WT |
722 | down_write(&nvm_lock); |
723 | dev = nvm_find_nvm_dev(disk_name); | |
cd9e9808 MB |
724 | if (!dev) { |
725 | pr_err("nvm: could not find device %s to unregister\n", | |
726 | disk_name); | |
d0a712ce | 727 | up_write(&nvm_lock); |
cd9e9808 MB |
728 | return; |
729 | } | |
730 | ||
cd9e9808 MB |
731 | list_del(&dev->devices); |
732 | up_write(&nvm_lock); | |
c1480ad5 MB |
733 | |
734 | nvm_exit(dev); | |
735 | kfree(dev); | |
cd9e9808 MB |
736 | } |
737 | EXPORT_SYMBOL(nvm_unregister); | |
738 | ||
739 | static const struct block_device_operations nvm_fops = { | |
740 | .owner = THIS_MODULE, | |
741 | }; | |
742 | ||
743 | static int nvm_create_target(struct nvm_dev *dev, | |
744 | struct nvm_ioctl_create *create) | |
745 | { | |
746 | struct nvm_ioctl_create_simple *s = &create->conf.s; | |
747 | struct request_queue *tqueue; | |
cd9e9808 MB |
748 | struct gendisk *tdisk; |
749 | struct nvm_tgt_type *tt; | |
750 | struct nvm_target *t; | |
751 | void *targetdata; | |
cd9e9808 MB |
752 | |
753 | if (!dev->mt) { | |
762796bc MB |
754 | pr_info("nvm: device has no media manager registered.\n"); |
755 | return -ENODEV; | |
cd9e9808 MB |
756 | } |
757 | ||
762796bc | 758 | down_write(&nvm_lock); |
cd9e9808 MB |
759 | tt = nvm_find_target_type(create->tgttype); |
760 | if (!tt) { | |
761 | pr_err("nvm: target type %s not found\n", create->tgttype); | |
d0a712ce | 762 | up_write(&nvm_lock); |
cd9e9808 MB |
763 | return -EINVAL; |
764 | } | |
765 | ||
6f8645cb SL |
766 | t = nvm_find_target(create->tgtname); |
767 | if (t) { | |
768 | pr_err("nvm: target name already exists.\n"); | |
769 | up_write(&nvm_lock); | |
770 | return -EINVAL; | |
cd9e9808 MB |
771 | } |
772 | up_write(&nvm_lock); | |
773 | ||
774 | t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); | |
775 | if (!t) | |
776 | return -ENOMEM; | |
777 | ||
778 | tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node); | |
779 | if (!tqueue) | |
780 | goto err_t; | |
781 | blk_queue_make_request(tqueue, tt->make_rq); | |
782 | ||
783 | tdisk = alloc_disk(0); | |
784 | if (!tdisk) | |
785 | goto err_queue; | |
786 | ||
787 | sprintf(tdisk->disk_name, "%s", create->tgtname); | |
788 | tdisk->flags = GENHD_FL_EXT_DEVT; | |
789 | tdisk->major = 0; | |
790 | tdisk->first_minor = 0; | |
791 | tdisk->fops = &nvm_fops; | |
792 | tdisk->queue = tqueue; | |
793 | ||
794 | targetdata = tt->init(dev, tdisk, s->lun_begin, s->lun_end); | |
795 | if (IS_ERR(targetdata)) | |
796 | goto err_init; | |
797 | ||
798 | tdisk->private_data = targetdata; | |
799 | tqueue->queuedata = targetdata; | |
800 | ||
801 | blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect); | |
802 | ||
803 | set_capacity(tdisk, tt->capacity(targetdata)); | |
804 | add_disk(tdisk); | |
805 | ||
806 | t->type = tt; | |
807 | t->disk = tdisk; | |
808 | ||
809 | down_write(&nvm_lock); | |
6f8645cb | 810 | list_add_tail(&t->list, &nvm_targets); |
cd9e9808 MB |
811 | up_write(&nvm_lock); |
812 | ||
813 | return 0; | |
814 | err_init: | |
815 | put_disk(tdisk); | |
816 | err_queue: | |
817 | blk_cleanup_queue(tqueue); | |
818 | err_t: | |
819 | kfree(t); | |
820 | return -ENOMEM; | |
821 | } | |
822 | ||
823 | static void nvm_remove_target(struct nvm_target *t) | |
824 | { | |
825 | struct nvm_tgt_type *tt = t->type; | |
826 | struct gendisk *tdisk = t->disk; | |
827 | struct request_queue *q = tdisk->queue; | |
828 | ||
829 | lockdep_assert_held(&nvm_lock); | |
830 | ||
831 | del_gendisk(tdisk); | |
d09f9581 JG |
832 | blk_cleanup_queue(q); |
833 | ||
cd9e9808 MB |
834 | if (tt->exit) |
835 | tt->exit(tdisk->private_data); | |
836 | ||
cd9e9808 MB |
837 | put_disk(tdisk); |
838 | ||
839 | list_del(&t->list); | |
840 | kfree(t); | |
841 | } | |
842 | ||
843 | static int __nvm_configure_create(struct nvm_ioctl_create *create) | |
844 | { | |
845 | struct nvm_dev *dev; | |
846 | struct nvm_ioctl_create_simple *s; | |
847 | ||
d0a712ce | 848 | down_write(&nvm_lock); |
cd9e9808 | 849 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 850 | up_write(&nvm_lock); |
cd9e9808 MB |
851 | if (!dev) { |
852 | pr_err("nvm: device not found\n"); | |
853 | return -EINVAL; | |
854 | } | |
855 | ||
856 | if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) { | |
857 | pr_err("nvm: config type not valid\n"); | |
858 | return -EINVAL; | |
859 | } | |
860 | s = &create->conf.s; | |
861 | ||
862 | if (s->lun_begin > s->lun_end || s->lun_end > dev->nr_luns) { | |
863 | pr_err("nvm: lun out of bound (%u:%u > %u)\n", | |
864 | s->lun_begin, s->lun_end, dev->nr_luns); | |
865 | return -EINVAL; | |
866 | } | |
867 | ||
868 | return nvm_create_target(dev, create); | |
869 | } | |
870 | ||
871 | static int __nvm_configure_remove(struct nvm_ioctl_remove *remove) | |
872 | { | |
6f8645cb | 873 | struct nvm_target *t; |
cd9e9808 MB |
874 | |
875 | down_write(&nvm_lock); | |
6f8645cb SL |
876 | t = nvm_find_target(remove->tgtname); |
877 | if (!t) { | |
cd9e9808 | 878 | pr_err("nvm: target \"%s\" doesn't exist.\n", remove->tgtname); |
6f8645cb | 879 | up_write(&nvm_lock); |
cd9e9808 MB |
880 | return -EINVAL; |
881 | } | |
882 | ||
6f8645cb SL |
883 | nvm_remove_target(t); |
884 | up_write(&nvm_lock); | |
885 | ||
cd9e9808 MB |
886 | return 0; |
887 | } | |
888 | ||
889 | #ifdef CONFIG_NVM_DEBUG | |
890 | static int nvm_configure_show(const char *val) | |
891 | { | |
892 | struct nvm_dev *dev; | |
893 | char opcode, devname[DISK_NAME_LEN]; | |
894 | int ret; | |
895 | ||
896 | ret = sscanf(val, "%c %32s", &opcode, devname); | |
897 | if (ret != 2) { | |
898 | pr_err("nvm: invalid command. Use \"opcode devicename\".\n"); | |
899 | return -EINVAL; | |
900 | } | |
901 | ||
d0a712ce | 902 | down_write(&nvm_lock); |
cd9e9808 | 903 | dev = nvm_find_nvm_dev(devname); |
d0a712ce | 904 | up_write(&nvm_lock); |
cd9e9808 MB |
905 | if (!dev) { |
906 | pr_err("nvm: device not found\n"); | |
907 | return -EINVAL; | |
908 | } | |
909 | ||
910 | if (!dev->mt) | |
911 | return 0; | |
912 | ||
2fde0e48 | 913 | dev->mt->lun_info_print(dev); |
cd9e9808 MB |
914 | |
915 | return 0; | |
916 | } | |
917 | ||
918 | static int nvm_configure_remove(const char *val) | |
919 | { | |
920 | struct nvm_ioctl_remove remove; | |
921 | char opcode; | |
922 | int ret; | |
923 | ||
924 | ret = sscanf(val, "%c %256s", &opcode, remove.tgtname); | |
925 | if (ret != 2) { | |
926 | pr_err("nvm: invalid command. Use \"d targetname\".\n"); | |
927 | return -EINVAL; | |
928 | } | |
929 | ||
930 | remove.flags = 0; | |
931 | ||
932 | return __nvm_configure_remove(&remove); | |
933 | } | |
934 | ||
935 | static int nvm_configure_create(const char *val) | |
936 | { | |
937 | struct nvm_ioctl_create create; | |
938 | char opcode; | |
939 | int lun_begin, lun_end, ret; | |
940 | ||
941 | ret = sscanf(val, "%c %256s %256s %48s %u:%u", &opcode, create.dev, | |
942 | create.tgtname, create.tgttype, | |
943 | &lun_begin, &lun_end); | |
944 | if (ret != 6) { | |
945 | pr_err("nvm: invalid command. Use \"opcode device name tgttype lun_begin:lun_end\".\n"); | |
946 | return -EINVAL; | |
947 | } | |
948 | ||
949 | create.flags = 0; | |
950 | create.conf.type = NVM_CONFIG_TYPE_SIMPLE; | |
951 | create.conf.s.lun_begin = lun_begin; | |
952 | create.conf.s.lun_end = lun_end; | |
953 | ||
954 | return __nvm_configure_create(&create); | |
955 | } | |
956 | ||
957 | ||
958 | /* Exposes administrative interface through /sys/module/lnvm/configure_by_str */ | |
959 | static int nvm_configure_by_str_event(const char *val, | |
960 | const struct kernel_param *kp) | |
961 | { | |
962 | char opcode; | |
963 | int ret; | |
964 | ||
965 | ret = sscanf(val, "%c", &opcode); | |
966 | if (ret != 1) { | |
967 | pr_err("nvm: string must have the format of \"cmd ...\"\n"); | |
968 | return -EINVAL; | |
969 | } | |
970 | ||
971 | switch (opcode) { | |
972 | case 'a': | |
973 | return nvm_configure_create(val); | |
974 | case 'd': | |
975 | return nvm_configure_remove(val); | |
976 | case 's': | |
977 | return nvm_configure_show(val); | |
978 | default: | |
979 | pr_err("nvm: invalid command\n"); | |
980 | return -EINVAL; | |
981 | } | |
982 | ||
983 | return 0; | |
984 | } | |
985 | ||
986 | static int nvm_configure_get(char *buf, const struct kernel_param *kp) | |
987 | { | |
5e422cff | 988 | int sz; |
cd9e9808 MB |
989 | struct nvm_dev *dev; |
990 | ||
5e422cff | 991 | sz = sprintf(buf, "available devices:\n"); |
cd9e9808 MB |
992 | down_write(&nvm_lock); |
993 | list_for_each_entry(dev, &nvm_devices, devices) { | |
5e422cff | 994 | if (sz > 4095 - DISK_NAME_LEN - 2) |
cd9e9808 | 995 | break; |
5e422cff | 996 | sz += sprintf(buf + sz, " %32s\n", dev->name); |
cd9e9808 MB |
997 | } |
998 | up_write(&nvm_lock); | |
999 | ||
5e422cff | 1000 | return sz; |
cd9e9808 MB |
1001 | } |
1002 | ||
1003 | static const struct kernel_param_ops nvm_configure_by_str_event_param_ops = { | |
1004 | .set = nvm_configure_by_str_event, | |
1005 | .get = nvm_configure_get, | |
1006 | }; | |
1007 | ||
1008 | #undef MODULE_PARAM_PREFIX | |
1009 | #define MODULE_PARAM_PREFIX "lnvm." | |
1010 | ||
1011 | module_param_cb(configure_debug, &nvm_configure_by_str_event_param_ops, NULL, | |
1012 | 0644); | |
1013 | ||
1014 | #endif /* CONFIG_NVM_DEBUG */ | |
1015 | ||
1016 | static long nvm_ioctl_info(struct file *file, void __user *arg) | |
1017 | { | |
1018 | struct nvm_ioctl_info *info; | |
1019 | struct nvm_tgt_type *tt; | |
1020 | int tgt_iter = 0; | |
1021 | ||
1022 | if (!capable(CAP_SYS_ADMIN)) | |
1023 | return -EPERM; | |
1024 | ||
1025 | info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); | |
1026 | if (IS_ERR(info)) | |
1027 | return -EFAULT; | |
1028 | ||
1029 | info->version[0] = NVM_VERSION_MAJOR; | |
1030 | info->version[1] = NVM_VERSION_MINOR; | |
1031 | info->version[2] = NVM_VERSION_PATCH; | |
1032 | ||
1033 | down_write(&nvm_lock); | |
6063fe39 | 1034 | list_for_each_entry(tt, &nvm_tgt_types, list) { |
cd9e9808 MB |
1035 | struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; |
1036 | ||
1037 | tgt->version[0] = tt->version[0]; | |
1038 | tgt->version[1] = tt->version[1]; | |
1039 | tgt->version[2] = tt->version[2]; | |
1040 | strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); | |
1041 | ||
1042 | tgt_iter++; | |
1043 | } | |
1044 | ||
1045 | info->tgtsize = tgt_iter; | |
1046 | up_write(&nvm_lock); | |
1047 | ||
76e25081 SM |
1048 | if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { |
1049 | kfree(info); | |
cd9e9808 | 1050 | return -EFAULT; |
76e25081 | 1051 | } |
cd9e9808 MB |
1052 | |
1053 | kfree(info); | |
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | static long nvm_ioctl_get_devices(struct file *file, void __user *arg) | |
1058 | { | |
1059 | struct nvm_ioctl_get_devices *devices; | |
1060 | struct nvm_dev *dev; | |
1061 | int i = 0; | |
1062 | ||
1063 | if (!capable(CAP_SYS_ADMIN)) | |
1064 | return -EPERM; | |
1065 | ||
1066 | devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); | |
1067 | if (!devices) | |
1068 | return -ENOMEM; | |
1069 | ||
1070 | down_write(&nvm_lock); | |
1071 | list_for_each_entry(dev, &nvm_devices, devices) { | |
1072 | struct nvm_ioctl_device_info *info = &devices->info[i]; | |
1073 | ||
1074 | sprintf(info->devname, "%s", dev->name); | |
1075 | if (dev->mt) { | |
1076 | info->bmversion[0] = dev->mt->version[0]; | |
1077 | info->bmversion[1] = dev->mt->version[1]; | |
1078 | info->bmversion[2] = dev->mt->version[2]; | |
1079 | sprintf(info->bmname, "%s", dev->mt->name); | |
1080 | } else { | |
1081 | sprintf(info->bmname, "none"); | |
1082 | } | |
1083 | ||
1084 | i++; | |
1085 | if (i > 31) { | |
1086 | pr_err("nvm: max 31 devices can be reported.\n"); | |
1087 | break; | |
1088 | } | |
1089 | } | |
1090 | up_write(&nvm_lock); | |
1091 | ||
1092 | devices->nr_devices = i; | |
1093 | ||
76e25081 SM |
1094 | if (copy_to_user(arg, devices, |
1095 | sizeof(struct nvm_ioctl_get_devices))) { | |
1096 | kfree(devices); | |
cd9e9808 | 1097 | return -EFAULT; |
76e25081 | 1098 | } |
cd9e9808 MB |
1099 | |
1100 | kfree(devices); | |
1101 | return 0; | |
1102 | } | |
1103 | ||
1104 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
1105 | { | |
1106 | struct nvm_ioctl_create create; | |
1107 | ||
1108 | if (!capable(CAP_SYS_ADMIN)) | |
1109 | return -EPERM; | |
1110 | ||
1111 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) | |
1112 | return -EFAULT; | |
1113 | ||
1114 | create.dev[DISK_NAME_LEN - 1] = '\0'; | |
1115 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
1116 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1117 | ||
1118 | if (create.flags != 0) { | |
1119 | pr_err("nvm: no flags supported\n"); | |
1120 | return -EINVAL; | |
1121 | } | |
1122 | ||
1123 | return __nvm_configure_create(&create); | |
1124 | } | |
1125 | ||
1126 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
1127 | { | |
1128 | struct nvm_ioctl_remove remove; | |
1129 | ||
1130 | if (!capable(CAP_SYS_ADMIN)) | |
1131 | return -EPERM; | |
1132 | ||
1133 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) | |
1134 | return -EFAULT; | |
1135 | ||
1136 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1137 | ||
1138 | if (remove.flags != 0) { | |
1139 | pr_err("nvm: no flags supported\n"); | |
1140 | return -EINVAL; | |
1141 | } | |
1142 | ||
1143 | return __nvm_configure_remove(&remove); | |
1144 | } | |
1145 | ||
55696154 MB |
1146 | static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info) |
1147 | { | |
1148 | info->seqnr = 1; | |
1149 | info->erase_cnt = 0; | |
1150 | info->version = 1; | |
1151 | } | |
1152 | ||
1153 | static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init) | |
1154 | { | |
1155 | struct nvm_dev *dev; | |
1156 | struct nvm_sb_info info; | |
b7692076 | 1157 | int ret; |
55696154 MB |
1158 | |
1159 | down_write(&nvm_lock); | |
1160 | dev = nvm_find_nvm_dev(init->dev); | |
1161 | up_write(&nvm_lock); | |
1162 | if (!dev) { | |
1163 | pr_err("nvm: device not found\n"); | |
1164 | return -EINVAL; | |
1165 | } | |
1166 | ||
1167 | nvm_setup_nvm_sb_info(&info); | |
1168 | ||
1169 | strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN); | |
1170 | info.fs_ppa.ppa = -1; | |
1171 | ||
bf643185 MB |
1172 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
1173 | ret = nvm_init_sysblock(dev, &info); | |
1174 | if (ret) | |
1175 | return ret; | |
1176 | } | |
b7692076 MB |
1177 | |
1178 | memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info)); | |
1179 | ||
1180 | down_write(&nvm_lock); | |
1181 | dev->mt = nvm_init_mgr(dev); | |
1182 | up_write(&nvm_lock); | |
1183 | ||
1184 | return 0; | |
55696154 MB |
1185 | } |
1186 | ||
1187 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) | |
1188 | { | |
1189 | struct nvm_ioctl_dev_init init; | |
1190 | ||
1191 | if (!capable(CAP_SYS_ADMIN)) | |
1192 | return -EPERM; | |
1193 | ||
1194 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) | |
1195 | return -EFAULT; | |
1196 | ||
1197 | if (init.flags != 0) { | |
1198 | pr_err("nvm: no flags supported\n"); | |
1199 | return -EINVAL; | |
1200 | } | |
1201 | ||
1202 | init.dev[DISK_NAME_LEN - 1] = '\0'; | |
1203 | ||
1204 | return __nvm_ioctl_dev_init(&init); | |
1205 | } | |
1206 | ||
8b4970c4 MB |
1207 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
1208 | { | |
1209 | struct nvm_ioctl_dev_factory fact; | |
1210 | struct nvm_dev *dev; | |
1211 | ||
1212 | if (!capable(CAP_SYS_ADMIN)) | |
1213 | return -EPERM; | |
1214 | ||
1215 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) | |
1216 | return -EFAULT; | |
1217 | ||
1218 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1219 | ||
1220 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1221 | return -EINVAL; | |
1222 | ||
1223 | down_write(&nvm_lock); | |
1224 | dev = nvm_find_nvm_dev(fact.dev); | |
1225 | up_write(&nvm_lock); | |
1226 | if (!dev) { | |
1227 | pr_err("nvm: device not found\n"); | |
1228 | return -EINVAL; | |
1229 | } | |
1230 | ||
1231 | if (dev->mt) { | |
1232 | dev->mt->unregister_mgr(dev); | |
1233 | dev->mt = NULL; | |
1234 | } | |
1235 | ||
bf643185 MB |
1236 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) |
1237 | return nvm_dev_factory(dev, fact.flags); | |
1238 | ||
1239 | return 0; | |
8b4970c4 MB |
1240 | } |
1241 | ||
cd9e9808 MB |
1242 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1243 | { | |
1244 | void __user *argp = (void __user *)arg; | |
1245 | ||
1246 | switch (cmd) { | |
1247 | case NVM_INFO: | |
1248 | return nvm_ioctl_info(file, argp); | |
1249 | case NVM_GET_DEVICES: | |
1250 | return nvm_ioctl_get_devices(file, argp); | |
1251 | case NVM_DEV_CREATE: | |
1252 | return nvm_ioctl_dev_create(file, argp); | |
1253 | case NVM_DEV_REMOVE: | |
1254 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1255 | case NVM_DEV_INIT: |
1256 | return nvm_ioctl_dev_init(file, argp); | |
8b4970c4 MB |
1257 | case NVM_DEV_FACTORY: |
1258 | return nvm_ioctl_dev_factory(file, argp); | |
cd9e9808 MB |
1259 | } |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | static const struct file_operations _ctl_fops = { | |
1264 | .open = nonseekable_open, | |
1265 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1266 | .owner = THIS_MODULE, | |
1267 | .llseek = noop_llseek, | |
1268 | }; | |
1269 | ||
1270 | static struct miscdevice _nvm_misc = { | |
1271 | .minor = MISC_DYNAMIC_MINOR, | |
1272 | .name = "lightnvm", | |
1273 | .nodename = "lightnvm/control", | |
1274 | .fops = &_ctl_fops, | |
1275 | }; | |
1276 | ||
1277 | MODULE_ALIAS_MISCDEV(MISC_DYNAMIC_MINOR); | |
1278 | ||
1279 | static int __init nvm_mod_init(void) | |
1280 | { | |
1281 | int ret; | |
1282 | ||
1283 | ret = misc_register(&_nvm_misc); | |
1284 | if (ret) | |
1285 | pr_err("nvm: misc_register failed for control device"); | |
1286 | ||
1287 | return ret; | |
1288 | } | |
1289 | ||
1290 | static void __exit nvm_mod_exit(void) | |
1291 | { | |
1292 | misc_deregister(&_nvm_misc); | |
1293 | } | |
1294 | ||
1295 | MODULE_AUTHOR("Matias Bjorling <m@bjorling.me>"); | |
1296 | MODULE_LICENSE("GPL v2"); | |
1297 | MODULE_VERSION("0.1"); | |
1298 | module_init(nvm_mod_init); | |
1299 | module_exit(nvm_mod_exit); |