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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> | |
389b2a1c | 25 | #include <linux/moduleparam.h> |
cd9e9808 MB |
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 | ||
da2d7cb8 | 89 | void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler) |
cd9e9808 | 90 | { |
75b85649 | 91 | dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler); |
cd9e9808 MB |
92 | } |
93 | EXPORT_SYMBOL(nvm_dev_dma_free); | |
94 | ||
95 | static struct nvmm_type *nvm_find_mgr_type(const char *name) | |
96 | { | |
97 | struct nvmm_type *mt; | |
98 | ||
99 | list_for_each_entry(mt, &nvm_mgrs, list) | |
100 | if (!strcmp(name, mt->name)) | |
101 | return mt; | |
102 | ||
103 | return NULL; | |
104 | } | |
105 | ||
58eaaf9b | 106 | static struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev) |
762796bc MB |
107 | { |
108 | struct nvmm_type *mt; | |
109 | int ret; | |
110 | ||
111 | lockdep_assert_held(&nvm_lock); | |
112 | ||
113 | list_for_each_entry(mt, &nvm_mgrs, list) { | |
b7692076 MB |
114 | if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN)) |
115 | continue; | |
116 | ||
762796bc MB |
117 | ret = mt->register_mgr(dev); |
118 | if (ret < 0) { | |
119 | pr_err("nvm: media mgr failed to init (%d) on dev %s\n", | |
120 | ret, dev->name); | |
121 | return NULL; /* initialization failed */ | |
122 | } else if (ret > 0) | |
123 | return mt; | |
124 | } | |
125 | ||
126 | return NULL; | |
127 | } | |
128 | ||
cd9e9808 MB |
129 | int nvm_register_mgr(struct nvmm_type *mt) |
130 | { | |
762796bc | 131 | struct nvm_dev *dev; |
cd9e9808 MB |
132 | int ret = 0; |
133 | ||
134 | down_write(&nvm_lock); | |
762796bc | 135 | if (nvm_find_mgr_type(mt->name)) { |
cd9e9808 | 136 | ret = -EEXIST; |
762796bc MB |
137 | goto finish; |
138 | } else { | |
cd9e9808 | 139 | list_add(&mt->list, &nvm_mgrs); |
762796bc MB |
140 | } |
141 | ||
142 | /* try to register media mgr if any device have none configured */ | |
143 | list_for_each_entry(dev, &nvm_devices, devices) { | |
144 | if (dev->mt) | |
145 | continue; | |
146 | ||
147 | dev->mt = nvm_init_mgr(dev); | |
148 | } | |
149 | finish: | |
cd9e9808 MB |
150 | up_write(&nvm_lock); |
151 | ||
152 | return ret; | |
153 | } | |
154 | EXPORT_SYMBOL(nvm_register_mgr); | |
155 | ||
156 | void nvm_unregister_mgr(struct nvmm_type *mt) | |
157 | { | |
158 | if (!mt) | |
159 | return; | |
160 | ||
161 | down_write(&nvm_lock); | |
162 | list_del(&mt->list); | |
163 | up_write(&nvm_lock); | |
164 | } | |
165 | EXPORT_SYMBOL(nvm_unregister_mgr); | |
166 | ||
167 | static struct nvm_dev *nvm_find_nvm_dev(const char *name) | |
168 | { | |
169 | struct nvm_dev *dev; | |
170 | ||
171 | list_for_each_entry(dev, &nvm_devices, devices) | |
172 | if (!strcmp(name, dev->name)) | |
173 | return dev; | |
174 | ||
175 | return NULL; | |
176 | } | |
177 | ||
333ba053 JG |
178 | static void nvm_tgt_generic_to_addr_mode(struct nvm_tgt_dev *tgt_dev, |
179 | struct nvm_rq *rqd) | |
180 | { | |
181 | struct nvm_dev *dev = tgt_dev->parent; | |
182 | int i; | |
183 | ||
184 | if (rqd->nr_ppas > 1) { | |
185 | for (i = 0; i < rqd->nr_ppas; i++) { | |
186 | rqd->ppa_list[i] = dev->mt->trans_ppa(tgt_dev, | |
187 | rqd->ppa_list[i], TRANS_TGT_TO_DEV); | |
188 | rqd->ppa_list[i] = generic_to_dev_addr(dev, | |
189 | rqd->ppa_list[i]); | |
190 | } | |
191 | } else { | |
192 | rqd->ppa_addr = dev->mt->trans_ppa(tgt_dev, rqd->ppa_addr, | |
193 | TRANS_TGT_TO_DEV); | |
194 | rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); | |
195 | } | |
196 | } | |
197 | ||
a24ba464 JG |
198 | int nvm_set_bb_tbl(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas, |
199 | int type) | |
200 | { | |
201 | struct nvm_rq rqd; | |
202 | int ret; | |
203 | ||
204 | if (nr_ppas > dev->ops->max_phys_sect) { | |
205 | pr_err("nvm: unable to update all sysblocks atomically\n"); | |
206 | return -EINVAL; | |
207 | } | |
208 | ||
209 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
210 | ||
211 | nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); | |
212 | nvm_generic_to_addr_mode(dev, &rqd); | |
213 | ||
214 | ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); | |
215 | nvm_free_rqd_ppalist(dev, &rqd); | |
216 | if (ret) { | |
217 | pr_err("nvm: sysblk failed bb mark\n"); | |
218 | return -EINVAL; | |
219 | } | |
220 | ||
221 | return 0; | |
222 | } | |
223 | EXPORT_SYMBOL(nvm_set_bb_tbl); | |
224 | ||
333ba053 JG |
225 | int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, |
226 | int nr_ppas, int type) | |
227 | { | |
228 | struct nvm_dev *dev = tgt_dev->parent; | |
229 | struct nvm_rq rqd; | |
230 | int ret; | |
231 | ||
232 | if (nr_ppas > dev->ops->max_phys_sect) { | |
233 | pr_err("nvm: unable to update all blocks atomically\n"); | |
234 | return -EINVAL; | |
235 | } | |
236 | ||
237 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
238 | ||
239 | nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); | |
240 | nvm_tgt_generic_to_addr_mode(tgt_dev, &rqd); | |
241 | ||
242 | ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); | |
243 | nvm_free_rqd_ppalist(dev, &rqd); | |
244 | if (ret) { | |
245 | pr_err("nvm: sysblk failed bb mark\n"); | |
246 | return -EINVAL; | |
247 | } | |
248 | ||
249 | return 0; | |
250 | } | |
251 | EXPORT_SYMBOL(nvm_set_tgt_bb_tbl); | |
252 | ||
a279006a JG |
253 | int nvm_max_phys_sects(struct nvm_tgt_dev *tgt_dev) |
254 | { | |
255 | struct nvm_dev *dev = tgt_dev->parent; | |
256 | ||
257 | return dev->ops->max_phys_sect; | |
258 | } | |
259 | EXPORT_SYMBOL(nvm_max_phys_sects); | |
260 | ||
8e53624d | 261 | int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
cd9e9808 | 262 | { |
8e53624d JG |
263 | struct nvm_dev *dev = tgt_dev->parent; |
264 | ||
265 | return dev->mt->submit_io(tgt_dev, rqd); | |
cd9e9808 MB |
266 | } |
267 | EXPORT_SYMBOL(nvm_submit_io); | |
268 | ||
8e53624d | 269 | int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p, int flags) |
cd9e9808 | 270 | { |
8e53624d JG |
271 | struct nvm_dev *dev = tgt_dev->parent; |
272 | ||
273 | return dev->mt->erase_blk(tgt_dev, p, flags); | |
cd9e9808 MB |
274 | } |
275 | EXPORT_SYMBOL(nvm_erase_blk); | |
276 | ||
da2d7cb8 | 277 | int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb, |
959e911b JG |
278 | nvm_l2p_update_fn *update_l2p, void *priv) |
279 | { | |
da2d7cb8 JG |
280 | struct nvm_dev *dev = tgt_dev->parent; |
281 | ||
959e911b JG |
282 | if (!dev->ops->get_l2p_tbl) |
283 | return 0; | |
284 | ||
285 | return dev->ops->get_l2p_tbl(dev, slba, nlb, update_l2p, priv); | |
286 | } | |
287 | EXPORT_SYMBOL(nvm_get_l2p_tbl); | |
288 | ||
da2d7cb8 | 289 | int nvm_get_area(struct nvm_tgt_dev *tgt_dev, sector_t *lba, sector_t len) |
959e911b | 290 | { |
da2d7cb8 JG |
291 | struct nvm_dev *dev = tgt_dev->parent; |
292 | ||
959e911b JG |
293 | return dev->mt->get_area(dev, lba, len); |
294 | } | |
295 | EXPORT_SYMBOL(nvm_get_area); | |
296 | ||
da2d7cb8 | 297 | void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t lba) |
959e911b | 298 | { |
da2d7cb8 JG |
299 | struct nvm_dev *dev = tgt_dev->parent; |
300 | ||
959e911b JG |
301 | dev->mt->put_area(dev, lba); |
302 | } | |
303 | EXPORT_SYMBOL(nvm_put_area); | |
304 | ||
069368e9 MB |
305 | void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd) |
306 | { | |
307 | int i; | |
308 | ||
6d5be959 JG |
309 | if (rqd->nr_ppas > 1) { |
310 | for (i = 0; i < rqd->nr_ppas; i++) | |
069368e9 MB |
311 | rqd->ppa_list[i] = dev_to_generic_addr(dev, |
312 | rqd->ppa_list[i]); | |
313 | } else { | |
314 | rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr); | |
315 | } | |
316 | } | |
317 | EXPORT_SYMBOL(nvm_addr_to_generic_mode); | |
318 | ||
319 | void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd) | |
320 | { | |
321 | int i; | |
322 | ||
6d5be959 JG |
323 | if (rqd->nr_ppas > 1) { |
324 | for (i = 0; i < rqd->nr_ppas; i++) | |
069368e9 MB |
325 | rqd->ppa_list[i] = generic_to_dev_addr(dev, |
326 | rqd->ppa_list[i]); | |
327 | } else { | |
328 | rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); | |
329 | } | |
330 | } | |
331 | EXPORT_SYMBOL(nvm_generic_to_addr_mode); | |
332 | ||
abd805ec | 333 | int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, |
8680f165 | 334 | const struct ppa_addr *ppas, int nr_ppas, int vblk) |
069368e9 | 335 | { |
8e79b5cb | 336 | struct nvm_geo *geo = &dev->geo; |
abd805ec | 337 | int i, plane_cnt, pl_idx; |
8680f165 | 338 | struct ppa_addr ppa; |
abd805ec | 339 | |
8e79b5cb | 340 | if ((!vblk || geo->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) { |
6d5be959 | 341 | rqd->nr_ppas = nr_ppas; |
abd805ec | 342 | rqd->ppa_addr = ppas[0]; |
069368e9 | 343 | |
069368e9 | 344 | return 0; |
abd805ec | 345 | } |
069368e9 | 346 | |
6d5be959 | 347 | rqd->nr_ppas = nr_ppas; |
abd805ec MB |
348 | rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); |
349 | if (!rqd->ppa_list) { | |
350 | pr_err("nvm: failed to allocate dma memory\n"); | |
351 | return -ENOMEM; | |
352 | } | |
353 | ||
5ebc7d9f MB |
354 | if (!vblk) { |
355 | for (i = 0; i < nr_ppas; i++) | |
356 | rqd->ppa_list[i] = ppas[i]; | |
357 | } else { | |
8e79b5cb | 358 | plane_cnt = geo->plane_mode; |
6d5be959 | 359 | rqd->nr_ppas *= plane_cnt; |
5ebc7d9f | 360 | |
556755e9 | 361 | for (i = 0; i < nr_ppas; i++) { |
5ebc7d9f | 362 | for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { |
8680f165 MB |
363 | ppa = ppas[i]; |
364 | ppa.g.pl = pl_idx; | |
365 | rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa; | |
5ebc7d9f | 366 | } |
069368e9 MB |
367 | } |
368 | } | |
369 | ||
abd805ec MB |
370 | return 0; |
371 | } | |
372 | EXPORT_SYMBOL(nvm_set_rqd_ppalist); | |
373 | ||
374 | void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd) | |
375 | { | |
376 | if (!rqd->ppa_list) | |
377 | return; | |
378 | ||
379 | nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list); | |
380 | } | |
381 | EXPORT_SYMBOL(nvm_free_rqd_ppalist); | |
382 | ||
bb314979 JG |
383 | int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas, |
384 | int flags) | |
abd805ec MB |
385 | { |
386 | struct nvm_rq rqd; | |
387 | int ret; | |
388 | ||
389 | if (!dev->ops->erase_block) | |
390 | return 0; | |
391 | ||
392 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
393 | ||
5ebc7d9f | 394 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); |
abd805ec MB |
395 | if (ret) |
396 | return ret; | |
397 | ||
069368e9 MB |
398 | nvm_generic_to_addr_mode(dev, &rqd); |
399 | ||
bb314979 JG |
400 | rqd.flags = flags; |
401 | ||
069368e9 MB |
402 | ret = dev->ops->erase_block(dev, &rqd); |
403 | ||
abd805ec | 404 | nvm_free_rqd_ppalist(dev, &rqd); |
069368e9 MB |
405 | |
406 | return ret; | |
407 | } | |
408 | EXPORT_SYMBOL(nvm_erase_ppa); | |
409 | ||
91276162 MB |
410 | void nvm_end_io(struct nvm_rq *rqd, int error) |
411 | { | |
72d256ec MB |
412 | rqd->error = error; |
413 | rqd->end_io(rqd); | |
91276162 MB |
414 | } |
415 | EXPORT_SYMBOL(nvm_end_io); | |
416 | ||
09719b62 | 417 | static void nvm_end_io_sync(struct nvm_rq *rqd) |
91276162 MB |
418 | { |
419 | struct completion *waiting = rqd->wait; | |
420 | ||
421 | rqd->wait = NULL; | |
422 | ||
423 | complete(waiting); | |
424 | } | |
425 | ||
d9e46d5d | 426 | static int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode, |
1145e635 | 427 | int flags, void *buf, int len) |
09719b62 MB |
428 | { |
429 | DECLARE_COMPLETION_ONSTACK(wait); | |
09719b62 MB |
430 | struct bio *bio; |
431 | int ret; | |
432 | unsigned long hang_check; | |
433 | ||
434 | bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL); | |
435 | if (IS_ERR_OR_NULL(bio)) | |
436 | return -ENOMEM; | |
437 | ||
1145e635 | 438 | nvm_generic_to_addr_mode(dev, rqd); |
09719b62 | 439 | |
8e53624d | 440 | rqd->dev = NULL; |
1145e635 MB |
441 | rqd->opcode = opcode; |
442 | rqd->flags = flags; | |
443 | rqd->bio = bio; | |
444 | rqd->wait = &wait; | |
445 | rqd->end_io = nvm_end_io_sync; | |
09719b62 | 446 | |
1145e635 | 447 | ret = dev->ops->submit_io(dev, rqd); |
ecfb40c6 | 448 | if (ret) { |
ecfb40c6 MB |
449 | bio_put(bio); |
450 | return ret; | |
451 | } | |
09719b62 MB |
452 | |
453 | /* Prevent hang_check timer from firing at us during very long I/O */ | |
454 | hang_check = sysctl_hung_task_timeout_secs; | |
455 | if (hang_check) | |
12624af2 MB |
456 | while (!wait_for_completion_io_timeout(&wait, |
457 | hang_check * (HZ/2))) | |
458 | ; | |
09719b62 MB |
459 | else |
460 | wait_for_completion_io(&wait); | |
461 | ||
1145e635 MB |
462 | return rqd->error; |
463 | } | |
464 | ||
465 | /** | |
466 | * nvm_submit_ppa_list - submit user-defined ppa list to device. The user must | |
467 | * take to free ppa list if necessary. | |
468 | * @dev: device | |
469 | * @ppa_list: user created ppa_list | |
470 | * @nr_ppas: length of ppa_list | |
471 | * @opcode: device opcode | |
472 | * @flags: device flags | |
473 | * @buf: data buffer | |
474 | * @len: data buffer length | |
475 | */ | |
476 | int nvm_submit_ppa_list(struct nvm_dev *dev, struct ppa_addr *ppa_list, | |
477 | int nr_ppas, int opcode, int flags, void *buf, int len) | |
478 | { | |
479 | struct nvm_rq rqd; | |
480 | ||
481 | if (dev->ops->max_phys_sect < nr_ppas) | |
482 | return -EINVAL; | |
483 | ||
484 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
485 | ||
6d5be959 | 486 | rqd.nr_ppas = nr_ppas; |
1145e635 MB |
487 | if (nr_ppas > 1) |
488 | rqd.ppa_list = ppa_list; | |
489 | else | |
490 | rqd.ppa_addr = ppa_list[0]; | |
491 | ||
492 | return __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); | |
493 | } | |
494 | EXPORT_SYMBOL(nvm_submit_ppa_list); | |
495 | ||
496 | /** | |
497 | * nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded | |
498 | * as single, dual, quad plane PPAs depending on device type. | |
499 | * @dev: device | |
500 | * @ppa: user created ppa_list | |
501 | * @nr_ppas: length of ppa_list | |
502 | * @opcode: device opcode | |
503 | * @flags: device flags | |
504 | * @buf: data buffer | |
505 | * @len: data buffer length | |
506 | */ | |
507 | int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas, | |
508 | int opcode, int flags, void *buf, int len) | |
509 | { | |
510 | struct nvm_rq rqd; | |
511 | int ret; | |
512 | ||
513 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
5ebc7d9f | 514 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas, 1); |
1145e635 MB |
515 | if (ret) |
516 | return ret; | |
517 | ||
518 | ret = __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len); | |
519 | ||
09719b62 MB |
520 | nvm_free_rqd_ppalist(dev, &rqd); |
521 | ||
1145e635 | 522 | return ret; |
09719b62 MB |
523 | } |
524 | EXPORT_SYMBOL(nvm_submit_ppa); | |
525 | ||
22e8c976 MB |
526 | /* |
527 | * folds a bad block list from its plane representation to its virtual | |
528 | * block representation. The fold is done in place and reduced size is | |
529 | * returned. | |
530 | * | |
531 | * If any of the planes status are bad or grown bad block, the virtual block | |
532 | * is marked bad. If not bad, the first plane state acts as the block state. | |
533 | */ | |
534 | int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) | |
535 | { | |
8e79b5cb | 536 | struct nvm_geo *geo = &dev->geo; |
22e8c976 MB |
537 | int blk, offset, pl, blktype; |
538 | ||
8e79b5cb | 539 | if (nr_blks != geo->blks_per_lun * geo->plane_mode) |
22e8c976 MB |
540 | return -EINVAL; |
541 | ||
8e79b5cb JG |
542 | for (blk = 0; blk < geo->blks_per_lun; blk++) { |
543 | offset = blk * geo->plane_mode; | |
22e8c976 MB |
544 | blktype = blks[offset]; |
545 | ||
546 | /* Bad blocks on any planes take precedence over other types */ | |
8e79b5cb | 547 | for (pl = 0; pl < geo->plane_mode; pl++) { |
22e8c976 MB |
548 | if (blks[offset + pl] & |
549 | (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { | |
550 | blktype = blks[offset + pl]; | |
551 | break; | |
552 | } | |
553 | } | |
554 | ||
555 | blks[blk] = blktype; | |
556 | } | |
557 | ||
8e79b5cb | 558 | return geo->blks_per_lun; |
22e8c976 MB |
559 | } |
560 | EXPORT_SYMBOL(nvm_bb_tbl_fold); | |
561 | ||
e11903f5 MB |
562 | int nvm_get_bb_tbl(struct nvm_dev *dev, struct ppa_addr ppa, u8 *blks) |
563 | { | |
564 | ppa = generic_to_dev_addr(dev, ppa); | |
565 | ||
566 | return dev->ops->get_bb_tbl(dev, ppa, blks); | |
567 | } | |
568 | EXPORT_SYMBOL(nvm_get_bb_tbl); | |
569 | ||
333ba053 JG |
570 | int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa, |
571 | u8 *blks) | |
572 | { | |
573 | struct nvm_dev *dev = tgt_dev->parent; | |
574 | ||
575 | ppa = dev->mt->trans_ppa(tgt_dev, ppa, TRANS_TGT_TO_DEV); | |
576 | return nvm_get_bb_tbl(dev, ppa, blks); | |
577 | } | |
578 | EXPORT_SYMBOL(nvm_get_tgt_bb_tbl); | |
579 | ||
ca5927e7 MB |
580 | static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) |
581 | { | |
8e79b5cb | 582 | struct nvm_geo *geo = &dev->geo; |
ca5927e7 MB |
583 | int i; |
584 | ||
8e79b5cb | 585 | dev->lps_per_blk = geo->pgs_per_blk; |
ca5927e7 MB |
586 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); |
587 | if (!dev->lptbl) | |
588 | return -ENOMEM; | |
589 | ||
590 | /* Just a linear array */ | |
591 | for (i = 0; i < dev->lps_per_blk; i++) | |
592 | dev->lptbl[i] = i; | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) | |
598 | { | |
599 | int i, p; | |
600 | struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc; | |
601 | ||
602 | if (!mlc->num_pairs) | |
603 | return 0; | |
604 | ||
605 | dev->lps_per_blk = mlc->num_pairs; | |
606 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
607 | if (!dev->lptbl) | |
608 | return -ENOMEM; | |
609 | ||
610 | /* The lower page table encoding consists of a list of bytes, where each | |
611 | * has a lower and an upper half. The first half byte maintains the | |
612 | * increment value and every value after is an offset added to the | |
12624af2 MB |
613 | * previous incrementation value |
614 | */ | |
ca5927e7 MB |
615 | dev->lptbl[0] = mlc->pairs[0] & 0xF; |
616 | for (i = 1; i < dev->lps_per_blk; i++) { | |
617 | p = mlc->pairs[i >> 1]; | |
618 | if (i & 0x1) /* upper */ | |
619 | dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4); | |
620 | else /* lower */ | |
621 | dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF); | |
622 | } | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
cd9e9808 MB |
627 | static int nvm_core_init(struct nvm_dev *dev) |
628 | { | |
629 | struct nvm_id *id = &dev->identity; | |
630 | struct nvm_id_group *grp = &id->groups[0]; | |
8e79b5cb | 631 | struct nvm_geo *geo = &dev->geo; |
7f7c5d03 | 632 | int ret; |
cd9e9808 | 633 | |
8e79b5cb JG |
634 | /* Whole device values */ |
635 | geo->nr_chnls = grp->num_ch; | |
636 | geo->luns_per_chnl = grp->num_lun; | |
637 | ||
638 | /* Generic device values */ | |
639 | geo->pgs_per_blk = grp->num_pg; | |
640 | geo->blks_per_lun = grp->num_blk; | |
641 | geo->nr_planes = grp->num_pln; | |
642 | geo->fpg_size = grp->fpg_sz; | |
643 | geo->pfpg_size = grp->fpg_sz * grp->num_pln; | |
644 | geo->sec_size = grp->csecs; | |
645 | geo->oob_size = grp->sos; | |
646 | geo->sec_per_pg = grp->fpg_sz / grp->csecs; | |
647 | geo->mccap = grp->mccap; | |
648 | memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); | |
649 | ||
650 | geo->plane_mode = NVM_PLANE_SINGLE; | |
651 | geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size; | |
cd9e9808 MB |
652 | |
653 | if (grp->mpos & 0x020202) | |
8e79b5cb | 654 | geo->plane_mode = NVM_PLANE_DOUBLE; |
cd9e9808 | 655 | if (grp->mpos & 0x040404) |
8e79b5cb | 656 | geo->plane_mode = NVM_PLANE_QUAD; |
cd9e9808 | 657 | |
7f7c5d03 MB |
658 | if (grp->mtype != 0) { |
659 | pr_err("nvm: memory type not supported\n"); | |
660 | return -EINVAL; | |
661 | } | |
662 | ||
cd9e9808 | 663 | /* calculated values */ |
8e79b5cb JG |
664 | geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes; |
665 | geo->sec_per_blk = geo->sec_per_pl * geo->pgs_per_blk; | |
666 | geo->sec_per_lun = geo->sec_per_blk * geo->blks_per_lun; | |
667 | geo->nr_luns = geo->luns_per_chnl * geo->nr_chnls; | |
cd9e9808 | 668 | |
8e79b5cb JG |
669 | dev->total_secs = geo->nr_luns * geo->sec_per_lun; |
670 | dev->lun_map = kcalloc(BITS_TO_LONGS(geo->nr_luns), | |
da1e2849 WT |
671 | sizeof(unsigned long), GFP_KERNEL); |
672 | if (!dev->lun_map) | |
673 | return -ENOMEM; | |
7f7c5d03 MB |
674 | |
675 | switch (grp->fmtype) { | |
676 | case NVM_ID_FMTYPE_SLC: | |
677 | if (nvm_init_slc_tbl(dev, grp)) { | |
678 | ret = -ENOMEM; | |
679 | goto err_fmtype; | |
680 | } | |
681 | break; | |
682 | case NVM_ID_FMTYPE_MLC: | |
683 | if (nvm_init_mlc_tbl(dev, grp)) { | |
684 | ret = -ENOMEM; | |
685 | goto err_fmtype; | |
686 | } | |
687 | break; | |
688 | default: | |
689 | pr_err("nvm: flash type not supported\n"); | |
690 | ret = -EINVAL; | |
691 | goto err_fmtype; | |
692 | } | |
693 | ||
e3eb3799 | 694 | mutex_init(&dev->mlock); |
4c9dacb8 | 695 | spin_lock_init(&dev->lock); |
cd9e9808 | 696 | |
8e79b5cb | 697 | blk_queue_logical_block_size(dev->q, geo->sec_size); |
ac81bfa9 | 698 | |
cd9e9808 | 699 | return 0; |
7f7c5d03 MB |
700 | err_fmtype: |
701 | kfree(dev->lun_map); | |
702 | return ret; | |
cd9e9808 MB |
703 | } |
704 | ||
976bdfca MB |
705 | static void nvm_free_mgr(struct nvm_dev *dev) |
706 | { | |
976bdfca MB |
707 | if (!dev->mt) |
708 | return; | |
709 | ||
976bdfca MB |
710 | dev->mt->unregister_mgr(dev); |
711 | dev->mt = NULL; | |
712 | } | |
713 | ||
40267efd | 714 | void nvm_free(struct nvm_dev *dev) |
cd9e9808 MB |
715 | { |
716 | if (!dev) | |
717 | return; | |
718 | ||
976bdfca | 719 | nvm_free_mgr(dev); |
ca5927e7 | 720 | |
40267efd SL |
721 | if (dev->dma_pool) |
722 | dev->ops->destroy_dma_pool(dev->dma_pool); | |
723 | ||
ca5927e7 | 724 | kfree(dev->lptbl); |
7f7c5d03 | 725 | kfree(dev->lun_map); |
40267efd | 726 | kfree(dev); |
cd9e9808 MB |
727 | } |
728 | ||
729 | static int nvm_init(struct nvm_dev *dev) | |
730 | { | |
8e79b5cb | 731 | struct nvm_geo *geo = &dev->geo; |
480fc0db | 732 | int ret = -EINVAL; |
cd9e9808 MB |
733 | |
734 | if (!dev->q || !dev->ops) | |
480fc0db | 735 | return ret; |
cd9e9808 | 736 | |
16f26c3a | 737 | if (dev->ops->identity(dev, &dev->identity)) { |
cd9e9808 | 738 | pr_err("nvm: device could not be identified\n"); |
cd9e9808 MB |
739 | goto err; |
740 | } | |
741 | ||
742 | pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n", | |
743 | dev->identity.ver_id, dev->identity.vmnt, | |
744 | dev->identity.cgrps); | |
745 | ||
746 | if (dev->identity.ver_id != 1) { | |
747 | pr_err("nvm: device not supported by kernel."); | |
748 | goto err; | |
749 | } | |
750 | ||
751 | if (dev->identity.cgrps != 1) { | |
752 | pr_err("nvm: only one group configuration supported."); | |
753 | goto err; | |
754 | } | |
755 | ||
756 | ret = nvm_core_init(dev); | |
757 | if (ret) { | |
758 | pr_err("nvm: could not initialize core structures.\n"); | |
759 | goto err; | |
760 | } | |
761 | ||
cd9e9808 | 762 | pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", |
8e79b5cb JG |
763 | dev->name, geo->sec_per_pg, geo->nr_planes, |
764 | geo->pgs_per_blk, geo->blks_per_lun, | |
765 | geo->nr_luns, geo->nr_chnls); | |
cd9e9808 MB |
766 | return 0; |
767 | err: | |
cd9e9808 MB |
768 | pr_err("nvm: failed to initialize nvm\n"); |
769 | return ret; | |
770 | } | |
771 | ||
b0b4e09c | 772 | struct nvm_dev *nvm_alloc_dev(int node) |
cd9e9808 | 773 | { |
b0b4e09c | 774 | return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node); |
cd9e9808 | 775 | } |
b0b4e09c | 776 | EXPORT_SYMBOL(nvm_alloc_dev); |
cd9e9808 | 777 | |
b0b4e09c | 778 | int nvm_register(struct nvm_dev *dev) |
cd9e9808 | 779 | { |
cd9e9808 MB |
780 | int ret; |
781 | ||
cd9e9808 MB |
782 | ret = nvm_init(dev); |
783 | if (ret) | |
784 | goto err_init; | |
785 | ||
d160147b WT |
786 | if (dev->ops->max_phys_sect > 256) { |
787 | pr_info("nvm: max sectors supported is 256.\n"); | |
788 | ret = -EINVAL; | |
789 | goto err_init; | |
790 | } | |
791 | ||
cd9e9808 | 792 | if (dev->ops->max_phys_sect > 1) { |
75b85649 JG |
793 | dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist"); |
794 | if (!dev->dma_pool) { | |
795 | pr_err("nvm: could not create dma pool\n"); | |
93e70c1f MB |
796 | ret = -ENOMEM; |
797 | goto err_init; | |
cd9e9808 | 798 | } |
cd9e9808 MB |
799 | } |
800 | ||
bf643185 MB |
801 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
802 | ret = nvm_get_sysblock(dev, &dev->sb); | |
803 | if (!ret) | |
804 | pr_err("nvm: device not initialized.\n"); | |
805 | else if (ret < 0) | |
806 | pr_err("nvm: err (%d) on device initialization\n", ret); | |
807 | } | |
b7692076 | 808 | |
762796bc | 809 | /* register device with a supported media manager */ |
edad2e66 | 810 | down_write(&nvm_lock); |
b7692076 MB |
811 | if (ret > 0) |
812 | dev->mt = nvm_init_mgr(dev); | |
edad2e66 MB |
813 | list_add(&dev->devices, &nvm_devices); |
814 | up_write(&nvm_lock); | |
815 | ||
cd9e9808 MB |
816 | return 0; |
817 | err_init: | |
da1e2849 | 818 | kfree(dev->lun_map); |
cd9e9808 MB |
819 | return ret; |
820 | } | |
821 | EXPORT_SYMBOL(nvm_register); | |
822 | ||
b0b4e09c | 823 | void nvm_unregister(struct nvm_dev *dev) |
cd9e9808 | 824 | { |
d0a712ce | 825 | down_write(&nvm_lock); |
cd9e9808 MB |
826 | list_del(&dev->devices); |
827 | up_write(&nvm_lock); | |
c1480ad5 | 828 | |
3dc87dd0 | 829 | nvm_free(dev); |
cd9e9808 MB |
830 | } |
831 | EXPORT_SYMBOL(nvm_unregister); | |
832 | ||
cd9e9808 MB |
833 | static int __nvm_configure_create(struct nvm_ioctl_create *create) |
834 | { | |
835 | struct nvm_dev *dev; | |
836 | struct nvm_ioctl_create_simple *s; | |
837 | ||
d0a712ce | 838 | down_write(&nvm_lock); |
cd9e9808 | 839 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 840 | up_write(&nvm_lock); |
b76eb20b | 841 | |
cd9e9808 MB |
842 | if (!dev) { |
843 | pr_err("nvm: device not found\n"); | |
844 | return -EINVAL; | |
845 | } | |
846 | ||
b76eb20b MB |
847 | if (!dev->mt) { |
848 | pr_info("nvm: device has no media manager registered.\n"); | |
849 | return -ENODEV; | |
850 | } | |
851 | ||
cd9e9808 MB |
852 | if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) { |
853 | pr_err("nvm: config type not valid\n"); | |
854 | return -EINVAL; | |
855 | } | |
856 | s = &create->conf.s; | |
857 | ||
8e79b5cb | 858 | if (s->lun_begin > s->lun_end || s->lun_end > dev->geo.nr_luns) { |
cd9e9808 | 859 | pr_err("nvm: lun out of bound (%u:%u > %u)\n", |
8e79b5cb | 860 | s->lun_begin, s->lun_end, dev->geo.nr_luns); |
cd9e9808 MB |
861 | return -EINVAL; |
862 | } | |
863 | ||
b76eb20b | 864 | return dev->mt->create_tgt(dev, create); |
cd9e9808 MB |
865 | } |
866 | ||
cd9e9808 MB |
867 | static long nvm_ioctl_info(struct file *file, void __user *arg) |
868 | { | |
869 | struct nvm_ioctl_info *info; | |
870 | struct nvm_tgt_type *tt; | |
871 | int tgt_iter = 0; | |
872 | ||
873 | if (!capable(CAP_SYS_ADMIN)) | |
874 | return -EPERM; | |
875 | ||
876 | info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); | |
877 | if (IS_ERR(info)) | |
878 | return -EFAULT; | |
879 | ||
880 | info->version[0] = NVM_VERSION_MAJOR; | |
881 | info->version[1] = NVM_VERSION_MINOR; | |
882 | info->version[2] = NVM_VERSION_PATCH; | |
883 | ||
884 | down_write(&nvm_lock); | |
6063fe39 | 885 | list_for_each_entry(tt, &nvm_tgt_types, list) { |
cd9e9808 MB |
886 | struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; |
887 | ||
888 | tgt->version[0] = tt->version[0]; | |
889 | tgt->version[1] = tt->version[1]; | |
890 | tgt->version[2] = tt->version[2]; | |
891 | strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); | |
892 | ||
893 | tgt_iter++; | |
894 | } | |
895 | ||
896 | info->tgtsize = tgt_iter; | |
897 | up_write(&nvm_lock); | |
898 | ||
76e25081 SM |
899 | if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { |
900 | kfree(info); | |
cd9e9808 | 901 | return -EFAULT; |
76e25081 | 902 | } |
cd9e9808 MB |
903 | |
904 | kfree(info); | |
905 | return 0; | |
906 | } | |
907 | ||
908 | static long nvm_ioctl_get_devices(struct file *file, void __user *arg) | |
909 | { | |
910 | struct nvm_ioctl_get_devices *devices; | |
911 | struct nvm_dev *dev; | |
912 | int i = 0; | |
913 | ||
914 | if (!capable(CAP_SYS_ADMIN)) | |
915 | return -EPERM; | |
916 | ||
917 | devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); | |
918 | if (!devices) | |
919 | return -ENOMEM; | |
920 | ||
921 | down_write(&nvm_lock); | |
922 | list_for_each_entry(dev, &nvm_devices, devices) { | |
923 | struct nvm_ioctl_device_info *info = &devices->info[i]; | |
924 | ||
925 | sprintf(info->devname, "%s", dev->name); | |
926 | if (dev->mt) { | |
927 | info->bmversion[0] = dev->mt->version[0]; | |
928 | info->bmversion[1] = dev->mt->version[1]; | |
929 | info->bmversion[2] = dev->mt->version[2]; | |
930 | sprintf(info->bmname, "%s", dev->mt->name); | |
931 | } else { | |
932 | sprintf(info->bmname, "none"); | |
933 | } | |
934 | ||
935 | i++; | |
936 | if (i > 31) { | |
937 | pr_err("nvm: max 31 devices can be reported.\n"); | |
938 | break; | |
939 | } | |
940 | } | |
941 | up_write(&nvm_lock); | |
942 | ||
943 | devices->nr_devices = i; | |
944 | ||
76e25081 SM |
945 | if (copy_to_user(arg, devices, |
946 | sizeof(struct nvm_ioctl_get_devices))) { | |
947 | kfree(devices); | |
cd9e9808 | 948 | return -EFAULT; |
76e25081 | 949 | } |
cd9e9808 MB |
950 | |
951 | kfree(devices); | |
952 | return 0; | |
953 | } | |
954 | ||
955 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
956 | { | |
957 | struct nvm_ioctl_create create; | |
958 | ||
959 | if (!capable(CAP_SYS_ADMIN)) | |
960 | return -EPERM; | |
961 | ||
962 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) | |
963 | return -EFAULT; | |
964 | ||
965 | create.dev[DISK_NAME_LEN - 1] = '\0'; | |
966 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
967 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
968 | ||
969 | if (create.flags != 0) { | |
970 | pr_err("nvm: no flags supported\n"); | |
971 | return -EINVAL; | |
972 | } | |
973 | ||
974 | return __nvm_configure_create(&create); | |
975 | } | |
976 | ||
977 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
978 | { | |
979 | struct nvm_ioctl_remove remove; | |
b76eb20b MB |
980 | struct nvm_dev *dev; |
981 | int ret = 0; | |
cd9e9808 MB |
982 | |
983 | if (!capable(CAP_SYS_ADMIN)) | |
984 | return -EPERM; | |
985 | ||
986 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) | |
987 | return -EFAULT; | |
988 | ||
989 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
990 | ||
991 | if (remove.flags != 0) { | |
992 | pr_err("nvm: no flags supported\n"); | |
993 | return -EINVAL; | |
994 | } | |
995 | ||
b76eb20b MB |
996 | list_for_each_entry(dev, &nvm_devices, devices) { |
997 | ret = dev->mt->remove_tgt(dev, &remove); | |
998 | if (!ret) | |
999 | break; | |
1000 | } | |
1001 | ||
1002 | return ret; | |
cd9e9808 MB |
1003 | } |
1004 | ||
55696154 MB |
1005 | static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info) |
1006 | { | |
1007 | info->seqnr = 1; | |
1008 | info->erase_cnt = 0; | |
1009 | info->version = 1; | |
1010 | } | |
1011 | ||
1012 | static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init) | |
1013 | { | |
1014 | struct nvm_dev *dev; | |
1015 | struct nvm_sb_info info; | |
b7692076 | 1016 | int ret; |
55696154 MB |
1017 | |
1018 | down_write(&nvm_lock); | |
1019 | dev = nvm_find_nvm_dev(init->dev); | |
1020 | up_write(&nvm_lock); | |
1021 | if (!dev) { | |
1022 | pr_err("nvm: device not found\n"); | |
1023 | return -EINVAL; | |
1024 | } | |
1025 | ||
1026 | nvm_setup_nvm_sb_info(&info); | |
1027 | ||
1028 | strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN); | |
1029 | info.fs_ppa.ppa = -1; | |
1030 | ||
bf643185 MB |
1031 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
1032 | ret = nvm_init_sysblock(dev, &info); | |
1033 | if (ret) | |
1034 | return ret; | |
1035 | } | |
b7692076 MB |
1036 | |
1037 | memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info)); | |
1038 | ||
1039 | down_write(&nvm_lock); | |
1040 | dev->mt = nvm_init_mgr(dev); | |
1041 | up_write(&nvm_lock); | |
1042 | ||
1043 | return 0; | |
55696154 MB |
1044 | } |
1045 | ||
1046 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) | |
1047 | { | |
1048 | struct nvm_ioctl_dev_init init; | |
1049 | ||
1050 | if (!capable(CAP_SYS_ADMIN)) | |
1051 | return -EPERM; | |
1052 | ||
1053 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) | |
1054 | return -EFAULT; | |
1055 | ||
1056 | if (init.flags != 0) { | |
1057 | pr_err("nvm: no flags supported\n"); | |
1058 | return -EINVAL; | |
1059 | } | |
1060 | ||
1061 | init.dev[DISK_NAME_LEN - 1] = '\0'; | |
1062 | ||
1063 | return __nvm_ioctl_dev_init(&init); | |
1064 | } | |
1065 | ||
8b4970c4 MB |
1066 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
1067 | { | |
1068 | struct nvm_ioctl_dev_factory fact; | |
1069 | struct nvm_dev *dev; | |
1070 | ||
1071 | if (!capable(CAP_SYS_ADMIN)) | |
1072 | return -EPERM; | |
1073 | ||
1074 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) | |
1075 | return -EFAULT; | |
1076 | ||
1077 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1078 | ||
1079 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1080 | return -EINVAL; | |
1081 | ||
1082 | down_write(&nvm_lock); | |
1083 | dev = nvm_find_nvm_dev(fact.dev); | |
1084 | up_write(&nvm_lock); | |
1085 | if (!dev) { | |
1086 | pr_err("nvm: device not found\n"); | |
1087 | return -EINVAL; | |
1088 | } | |
1089 | ||
976bdfca | 1090 | nvm_free_mgr(dev); |
8b4970c4 | 1091 | |
bf643185 MB |
1092 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) |
1093 | return nvm_dev_factory(dev, fact.flags); | |
1094 | ||
1095 | return 0; | |
8b4970c4 MB |
1096 | } |
1097 | ||
cd9e9808 MB |
1098 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1099 | { | |
1100 | void __user *argp = (void __user *)arg; | |
1101 | ||
1102 | switch (cmd) { | |
1103 | case NVM_INFO: | |
1104 | return nvm_ioctl_info(file, argp); | |
1105 | case NVM_GET_DEVICES: | |
1106 | return nvm_ioctl_get_devices(file, argp); | |
1107 | case NVM_DEV_CREATE: | |
1108 | return nvm_ioctl_dev_create(file, argp); | |
1109 | case NVM_DEV_REMOVE: | |
1110 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1111 | case NVM_DEV_INIT: |
1112 | return nvm_ioctl_dev_init(file, argp); | |
8b4970c4 MB |
1113 | case NVM_DEV_FACTORY: |
1114 | return nvm_ioctl_dev_factory(file, argp); | |
cd9e9808 MB |
1115 | } |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | static const struct file_operations _ctl_fops = { | |
1120 | .open = nonseekable_open, | |
1121 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1122 | .owner = THIS_MODULE, | |
1123 | .llseek = noop_llseek, | |
1124 | }; | |
1125 | ||
1126 | static struct miscdevice _nvm_misc = { | |
1127 | .minor = MISC_DYNAMIC_MINOR, | |
1128 | .name = "lightnvm", | |
1129 | .nodename = "lightnvm/control", | |
1130 | .fops = &_ctl_fops, | |
1131 | }; | |
389b2a1c | 1132 | builtin_misc_device(_nvm_misc); |