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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 | ||
33 | static LIST_HEAD(nvm_targets); | |
34 | static LIST_HEAD(nvm_mgrs); | |
35 | static LIST_HEAD(nvm_devices); | |
36 | static DECLARE_RWSEM(nvm_lock); | |
37 | ||
38 | static struct nvm_tgt_type *nvm_find_target_type(const char *name) | |
39 | { | |
40 | struct nvm_tgt_type *tt; | |
41 | ||
42 | list_for_each_entry(tt, &nvm_targets, list) | |
43 | if (!strcmp(name, tt->name)) | |
44 | return tt; | |
45 | ||
46 | return NULL; | |
47 | } | |
48 | ||
49 | int nvm_register_target(struct nvm_tgt_type *tt) | |
50 | { | |
51 | int ret = 0; | |
52 | ||
53 | down_write(&nvm_lock); | |
54 | if (nvm_find_target_type(tt->name)) | |
55 | ret = -EEXIST; | |
56 | else | |
57 | list_add(&tt->list, &nvm_targets); | |
58 | up_write(&nvm_lock); | |
59 | ||
60 | return ret; | |
61 | } | |
62 | EXPORT_SYMBOL(nvm_register_target); | |
63 | ||
64 | void nvm_unregister_target(struct nvm_tgt_type *tt) | |
65 | { | |
66 | if (!tt) | |
67 | return; | |
68 | ||
69 | down_write(&nvm_lock); | |
70 | list_del(&tt->list); | |
71 | up_write(&nvm_lock); | |
72 | } | |
73 | EXPORT_SYMBOL(nvm_unregister_target); | |
74 | ||
75 | void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, | |
76 | dma_addr_t *dma_handler) | |
77 | { | |
16f26c3a | 78 | return dev->ops->dev_dma_alloc(dev, dev->ppalist_pool, mem_flags, |
cd9e9808 MB |
79 | dma_handler); |
80 | } | |
81 | EXPORT_SYMBOL(nvm_dev_dma_alloc); | |
82 | ||
83 | void nvm_dev_dma_free(struct nvm_dev *dev, void *ppa_list, | |
84 | dma_addr_t dma_handler) | |
85 | { | |
86 | dev->ops->dev_dma_free(dev->ppalist_pool, ppa_list, dma_handler); | |
87 | } | |
88 | EXPORT_SYMBOL(nvm_dev_dma_free); | |
89 | ||
90 | static struct nvmm_type *nvm_find_mgr_type(const char *name) | |
91 | { | |
92 | struct nvmm_type *mt; | |
93 | ||
94 | list_for_each_entry(mt, &nvm_mgrs, list) | |
95 | if (!strcmp(name, mt->name)) | |
96 | return mt; | |
97 | ||
98 | return NULL; | |
99 | } | |
100 | ||
762796bc MB |
101 | struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev) |
102 | { | |
103 | struct nvmm_type *mt; | |
104 | int ret; | |
105 | ||
106 | lockdep_assert_held(&nvm_lock); | |
107 | ||
108 | list_for_each_entry(mt, &nvm_mgrs, list) { | |
b7692076 MB |
109 | if (strncmp(dev->sb.mmtype, mt->name, NVM_MMTYPE_LEN)) |
110 | continue; | |
111 | ||
762796bc MB |
112 | ret = mt->register_mgr(dev); |
113 | if (ret < 0) { | |
114 | pr_err("nvm: media mgr failed to init (%d) on dev %s\n", | |
115 | ret, dev->name); | |
116 | return NULL; /* initialization failed */ | |
117 | } else if (ret > 0) | |
118 | return mt; | |
119 | } | |
120 | ||
121 | return NULL; | |
122 | } | |
123 | ||
cd9e9808 MB |
124 | int nvm_register_mgr(struct nvmm_type *mt) |
125 | { | |
762796bc | 126 | struct nvm_dev *dev; |
cd9e9808 MB |
127 | int ret = 0; |
128 | ||
129 | down_write(&nvm_lock); | |
762796bc | 130 | if (nvm_find_mgr_type(mt->name)) { |
cd9e9808 | 131 | ret = -EEXIST; |
762796bc MB |
132 | goto finish; |
133 | } else { | |
cd9e9808 | 134 | list_add(&mt->list, &nvm_mgrs); |
762796bc MB |
135 | } |
136 | ||
137 | /* try to register media mgr if any device have none configured */ | |
138 | list_for_each_entry(dev, &nvm_devices, devices) { | |
139 | if (dev->mt) | |
140 | continue; | |
141 | ||
142 | dev->mt = nvm_init_mgr(dev); | |
143 | } | |
144 | finish: | |
cd9e9808 MB |
145 | up_write(&nvm_lock); |
146 | ||
147 | return ret; | |
148 | } | |
149 | EXPORT_SYMBOL(nvm_register_mgr); | |
150 | ||
151 | void nvm_unregister_mgr(struct nvmm_type *mt) | |
152 | { | |
153 | if (!mt) | |
154 | return; | |
155 | ||
156 | down_write(&nvm_lock); | |
157 | list_del(&mt->list); | |
158 | up_write(&nvm_lock); | |
159 | } | |
160 | EXPORT_SYMBOL(nvm_unregister_mgr); | |
161 | ||
162 | static struct nvm_dev *nvm_find_nvm_dev(const char *name) | |
163 | { | |
164 | struct nvm_dev *dev; | |
165 | ||
166 | list_for_each_entry(dev, &nvm_devices, devices) | |
167 | if (!strcmp(name, dev->name)) | |
168 | return dev; | |
169 | ||
170 | return NULL; | |
171 | } | |
172 | ||
ff0e498b JG |
173 | struct nvm_block *nvm_get_blk_unlocked(struct nvm_dev *dev, struct nvm_lun *lun, |
174 | unsigned long flags) | |
175 | { | |
176 | return dev->mt->get_blk_unlocked(dev, lun, flags); | |
177 | } | |
178 | EXPORT_SYMBOL(nvm_get_blk_unlocked); | |
179 | ||
180 | /* Assumes that all valid pages have already been moved on release to bm */ | |
181 | void nvm_put_blk_unlocked(struct nvm_dev *dev, struct nvm_block *blk) | |
182 | { | |
183 | return dev->mt->put_blk_unlocked(dev, blk); | |
184 | } | |
185 | EXPORT_SYMBOL(nvm_put_blk_unlocked); | |
186 | ||
cd9e9808 MB |
187 | struct nvm_block *nvm_get_blk(struct nvm_dev *dev, struct nvm_lun *lun, |
188 | unsigned long flags) | |
189 | { | |
190 | return dev->mt->get_blk(dev, lun, flags); | |
191 | } | |
192 | EXPORT_SYMBOL(nvm_get_blk); | |
193 | ||
194 | /* Assumes that all valid pages have already been moved on release to bm */ | |
195 | void nvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk) | |
196 | { | |
197 | return dev->mt->put_blk(dev, blk); | |
198 | } | |
199 | EXPORT_SYMBOL(nvm_put_blk); | |
200 | ||
201 | int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd) | |
202 | { | |
203 | return dev->mt->submit_io(dev, rqd); | |
204 | } | |
205 | EXPORT_SYMBOL(nvm_submit_io); | |
206 | ||
207 | int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk) | |
208 | { | |
209 | return dev->mt->erase_blk(dev, blk, 0); | |
210 | } | |
211 | EXPORT_SYMBOL(nvm_erase_blk); | |
212 | ||
069368e9 MB |
213 | void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd) |
214 | { | |
215 | int i; | |
216 | ||
217 | if (rqd->nr_pages > 1) { | |
218 | for (i = 0; i < rqd->nr_pages; i++) | |
219 | rqd->ppa_list[i] = dev_to_generic_addr(dev, | |
220 | rqd->ppa_list[i]); | |
221 | } else { | |
222 | rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr); | |
223 | } | |
224 | } | |
225 | EXPORT_SYMBOL(nvm_addr_to_generic_mode); | |
226 | ||
227 | void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd) | |
228 | { | |
229 | int i; | |
230 | ||
231 | if (rqd->nr_pages > 1) { | |
232 | for (i = 0; i < rqd->nr_pages; i++) | |
233 | rqd->ppa_list[i] = generic_to_dev_addr(dev, | |
234 | rqd->ppa_list[i]); | |
235 | } else { | |
236 | rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); | |
237 | } | |
238 | } | |
239 | EXPORT_SYMBOL(nvm_generic_to_addr_mode); | |
240 | ||
abd805ec MB |
241 | int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, |
242 | struct ppa_addr *ppas, int nr_ppas) | |
069368e9 | 243 | { |
abd805ec MB |
244 | int i, plane_cnt, pl_idx; |
245 | ||
246 | if (dev->plane_mode == NVM_PLANE_SINGLE && nr_ppas == 1) { | |
247 | rqd->nr_pages = 1; | |
248 | rqd->ppa_addr = ppas[0]; | |
069368e9 | 249 | |
069368e9 | 250 | return 0; |
abd805ec | 251 | } |
069368e9 | 252 | |
abd805ec MB |
253 | plane_cnt = (1 << dev->plane_mode); |
254 | rqd->nr_pages = plane_cnt * nr_ppas; | |
069368e9 | 255 | |
abd805ec MB |
256 | if (dev->ops->max_phys_sect < rqd->nr_pages) |
257 | return -EINVAL; | |
258 | ||
259 | rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); | |
260 | if (!rqd->ppa_list) { | |
261 | pr_err("nvm: failed to allocate dma memory\n"); | |
262 | return -ENOMEM; | |
263 | } | |
264 | ||
556755e9 MB |
265 | for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { |
266 | for (i = 0; i < nr_ppas; i++) { | |
abd805ec | 267 | ppas[i].g.pl = pl_idx; |
556755e9 | 268 | rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppas[i]; |
069368e9 MB |
269 | } |
270 | } | |
271 | ||
abd805ec MB |
272 | return 0; |
273 | } | |
274 | EXPORT_SYMBOL(nvm_set_rqd_ppalist); | |
275 | ||
276 | void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd) | |
277 | { | |
278 | if (!rqd->ppa_list) | |
279 | return; | |
280 | ||
281 | nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list); | |
282 | } | |
283 | EXPORT_SYMBOL(nvm_free_rqd_ppalist); | |
284 | ||
81e681d3 | 285 | int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas) |
abd805ec MB |
286 | { |
287 | struct nvm_rq rqd; | |
288 | int ret; | |
289 | ||
290 | if (!dev->ops->erase_block) | |
291 | return 0; | |
292 | ||
293 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
294 | ||
81e681d3 | 295 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas); |
abd805ec MB |
296 | if (ret) |
297 | return ret; | |
298 | ||
069368e9 MB |
299 | nvm_generic_to_addr_mode(dev, &rqd); |
300 | ||
301 | ret = dev->ops->erase_block(dev, &rqd); | |
302 | ||
abd805ec | 303 | nvm_free_rqd_ppalist(dev, &rqd); |
069368e9 MB |
304 | |
305 | return ret; | |
306 | } | |
307 | EXPORT_SYMBOL(nvm_erase_ppa); | |
308 | ||
91276162 MB |
309 | void nvm_end_io(struct nvm_rq *rqd, int error) |
310 | { | |
72d256ec MB |
311 | rqd->error = error; |
312 | rqd->end_io(rqd); | |
91276162 MB |
313 | } |
314 | EXPORT_SYMBOL(nvm_end_io); | |
315 | ||
09719b62 | 316 | static void nvm_end_io_sync(struct nvm_rq *rqd) |
91276162 MB |
317 | { |
318 | struct completion *waiting = rqd->wait; | |
319 | ||
320 | rqd->wait = NULL; | |
321 | ||
322 | complete(waiting); | |
323 | } | |
324 | ||
09719b62 MB |
325 | int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas, |
326 | int opcode, int flags, void *buf, int len) | |
327 | { | |
328 | DECLARE_COMPLETION_ONSTACK(wait); | |
329 | struct nvm_rq rqd; | |
330 | struct bio *bio; | |
331 | int ret; | |
332 | unsigned long hang_check; | |
333 | ||
334 | bio = bio_map_kern(dev->q, buf, len, GFP_KERNEL); | |
335 | if (IS_ERR_OR_NULL(bio)) | |
336 | return -ENOMEM; | |
337 | ||
338 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
339 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas); | |
340 | if (ret) { | |
341 | bio_put(bio); | |
342 | return ret; | |
343 | } | |
344 | ||
345 | rqd.opcode = opcode; | |
346 | rqd.bio = bio; | |
347 | rqd.wait = &wait; | |
348 | rqd.dev = dev; | |
349 | rqd.end_io = nvm_end_io_sync; | |
350 | rqd.flags = flags; | |
351 | nvm_generic_to_addr_mode(dev, &rqd); | |
352 | ||
353 | ret = dev->ops->submit_io(dev, &rqd); | |
354 | ||
355 | /* Prevent hang_check timer from firing at us during very long I/O */ | |
356 | hang_check = sysctl_hung_task_timeout_secs; | |
357 | if (hang_check) | |
358 | while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2))); | |
359 | else | |
360 | wait_for_completion_io(&wait); | |
361 | ||
362 | nvm_free_rqd_ppalist(dev, &rqd); | |
363 | ||
364 | return rqd.error; | |
365 | } | |
366 | EXPORT_SYMBOL(nvm_submit_ppa); | |
367 | ||
ca5927e7 MB |
368 | static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) |
369 | { | |
370 | int i; | |
371 | ||
372 | dev->lps_per_blk = dev->pgs_per_blk; | |
373 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
374 | if (!dev->lptbl) | |
375 | return -ENOMEM; | |
376 | ||
377 | /* Just a linear array */ | |
378 | for (i = 0; i < dev->lps_per_blk; i++) | |
379 | dev->lptbl[i] = i; | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) | |
385 | { | |
386 | int i, p; | |
387 | struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc; | |
388 | ||
389 | if (!mlc->num_pairs) | |
390 | return 0; | |
391 | ||
392 | dev->lps_per_blk = mlc->num_pairs; | |
393 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
394 | if (!dev->lptbl) | |
395 | return -ENOMEM; | |
396 | ||
397 | /* The lower page table encoding consists of a list of bytes, where each | |
398 | * has a lower and an upper half. The first half byte maintains the | |
399 | * increment value and every value after is an offset added to the | |
400 | * previous incrementation value */ | |
401 | dev->lptbl[0] = mlc->pairs[0] & 0xF; | |
402 | for (i = 1; i < dev->lps_per_blk; i++) { | |
403 | p = mlc->pairs[i >> 1]; | |
404 | if (i & 0x1) /* upper */ | |
405 | dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4); | |
406 | else /* lower */ | |
407 | dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF); | |
408 | } | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
cd9e9808 MB |
413 | static int nvm_core_init(struct nvm_dev *dev) |
414 | { | |
415 | struct nvm_id *id = &dev->identity; | |
416 | struct nvm_id_group *grp = &id->groups[0]; | |
417 | ||
418 | /* device values */ | |
419 | dev->nr_chnls = grp->num_ch; | |
420 | dev->luns_per_chnl = grp->num_lun; | |
421 | dev->pgs_per_blk = grp->num_pg; | |
422 | dev->blks_per_lun = grp->num_blk; | |
423 | dev->nr_planes = grp->num_pln; | |
424 | dev->sec_size = grp->csecs; | |
425 | dev->oob_size = grp->sos; | |
426 | dev->sec_per_pg = grp->fpg_sz / grp->csecs; | |
f9a99950 | 427 | dev->mccap = grp->mccap; |
7386af27 | 428 | memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); |
cd9e9808 MB |
429 | |
430 | dev->plane_mode = NVM_PLANE_SINGLE; | |
431 | dev->max_rq_size = dev->ops->max_phys_sect * dev->sec_size; | |
432 | ||
4264c980 MB |
433 | if (grp->mtype != 0) { |
434 | pr_err("nvm: memory type not supported\n"); | |
435 | return -EINVAL; | |
436 | } | |
437 | ||
ca5927e7 MB |
438 | switch (grp->fmtype) { |
439 | case NVM_ID_FMTYPE_SLC: | |
440 | if (nvm_init_slc_tbl(dev, grp)) | |
441 | return -ENOMEM; | |
442 | break; | |
443 | case NVM_ID_FMTYPE_MLC: | |
444 | if (nvm_init_mlc_tbl(dev, grp)) | |
445 | return -ENOMEM; | |
446 | break; | |
447 | default: | |
4264c980 MB |
448 | pr_err("nvm: flash type not supported\n"); |
449 | return -EINVAL; | |
450 | } | |
451 | ||
ca5927e7 MB |
452 | if (!dev->lps_per_blk) |
453 | pr_info("nvm: lower page programming table missing\n"); | |
454 | ||
cd9e9808 MB |
455 | if (grp->mpos & 0x020202) |
456 | dev->plane_mode = NVM_PLANE_DOUBLE; | |
457 | if (grp->mpos & 0x040404) | |
458 | dev->plane_mode = NVM_PLANE_QUAD; | |
459 | ||
460 | /* calculated values */ | |
461 | dev->sec_per_pl = dev->sec_per_pg * dev->nr_planes; | |
462 | dev->sec_per_blk = dev->sec_per_pl * dev->pgs_per_blk; | |
463 | dev->sec_per_lun = dev->sec_per_blk * dev->blks_per_lun; | |
464 | dev->nr_luns = dev->luns_per_chnl * dev->nr_chnls; | |
465 | ||
466 | dev->total_blocks = dev->nr_planes * | |
467 | dev->blks_per_lun * | |
468 | dev->luns_per_chnl * | |
469 | dev->nr_chnls; | |
470 | dev->total_pages = dev->total_blocks * dev->pgs_per_blk; | |
471 | INIT_LIST_HEAD(&dev->online_targets); | |
e3eb3799 | 472 | mutex_init(&dev->mlock); |
cd9e9808 MB |
473 | |
474 | return 0; | |
475 | } | |
476 | ||
477 | static void nvm_free(struct nvm_dev *dev) | |
478 | { | |
479 | if (!dev) | |
480 | return; | |
481 | ||
482 | if (dev->mt) | |
483 | dev->mt->unregister_mgr(dev); | |
ca5927e7 MB |
484 | |
485 | kfree(dev->lptbl); | |
cd9e9808 MB |
486 | } |
487 | ||
488 | static int nvm_init(struct nvm_dev *dev) | |
489 | { | |
480fc0db | 490 | int ret = -EINVAL; |
cd9e9808 MB |
491 | |
492 | if (!dev->q || !dev->ops) | |
480fc0db | 493 | return ret; |
cd9e9808 | 494 | |
16f26c3a | 495 | if (dev->ops->identity(dev, &dev->identity)) { |
cd9e9808 | 496 | pr_err("nvm: device could not be identified\n"); |
cd9e9808 MB |
497 | goto err; |
498 | } | |
499 | ||
500 | pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n", | |
501 | dev->identity.ver_id, dev->identity.vmnt, | |
502 | dev->identity.cgrps); | |
503 | ||
504 | if (dev->identity.ver_id != 1) { | |
505 | pr_err("nvm: device not supported by kernel."); | |
506 | goto err; | |
507 | } | |
508 | ||
509 | if (dev->identity.cgrps != 1) { | |
510 | pr_err("nvm: only one group configuration supported."); | |
511 | goto err; | |
512 | } | |
513 | ||
514 | ret = nvm_core_init(dev); | |
515 | if (ret) { | |
516 | pr_err("nvm: could not initialize core structures.\n"); | |
517 | goto err; | |
518 | } | |
519 | ||
cd9e9808 MB |
520 | pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", |
521 | dev->name, dev->sec_per_pg, dev->nr_planes, | |
522 | dev->pgs_per_blk, dev->blks_per_lun, dev->nr_luns, | |
523 | dev->nr_chnls); | |
524 | return 0; | |
525 | err: | |
cd9e9808 MB |
526 | pr_err("nvm: failed to initialize nvm\n"); |
527 | return ret; | |
528 | } | |
529 | ||
530 | static void nvm_exit(struct nvm_dev *dev) | |
531 | { | |
532 | if (dev->ppalist_pool) | |
533 | dev->ops->destroy_dma_pool(dev->ppalist_pool); | |
534 | nvm_free(dev); | |
535 | ||
536 | pr_info("nvm: successfully unloaded\n"); | |
537 | } | |
538 | ||
539 | int nvm_register(struct request_queue *q, char *disk_name, | |
540 | struct nvm_dev_ops *ops) | |
541 | { | |
542 | struct nvm_dev *dev; | |
543 | int ret; | |
544 | ||
545 | if (!ops->identity) | |
546 | return -EINVAL; | |
547 | ||
548 | dev = kzalloc(sizeof(struct nvm_dev), GFP_KERNEL); | |
549 | if (!dev) | |
550 | return -ENOMEM; | |
551 | ||
552 | dev->q = q; | |
553 | dev->ops = ops; | |
554 | strncpy(dev->name, disk_name, DISK_NAME_LEN); | |
555 | ||
556 | ret = nvm_init(dev); | |
557 | if (ret) | |
558 | goto err_init; | |
559 | ||
d160147b WT |
560 | if (dev->ops->max_phys_sect > 256) { |
561 | pr_info("nvm: max sectors supported is 256.\n"); | |
562 | ret = -EINVAL; | |
563 | goto err_init; | |
564 | } | |
565 | ||
cd9e9808 | 566 | if (dev->ops->max_phys_sect > 1) { |
16f26c3a | 567 | dev->ppalist_pool = dev->ops->create_dma_pool(dev, "ppalist"); |
cd9e9808 MB |
568 | if (!dev->ppalist_pool) { |
569 | pr_err("nvm: could not create ppa pool\n"); | |
93e70c1f MB |
570 | ret = -ENOMEM; |
571 | goto err_init; | |
cd9e9808 | 572 | } |
cd9e9808 MB |
573 | } |
574 | ||
bf643185 MB |
575 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
576 | ret = nvm_get_sysblock(dev, &dev->sb); | |
577 | if (!ret) | |
578 | pr_err("nvm: device not initialized.\n"); | |
579 | else if (ret < 0) | |
580 | pr_err("nvm: err (%d) on device initialization\n", ret); | |
581 | } | |
b7692076 | 582 | |
762796bc | 583 | /* register device with a supported media manager */ |
edad2e66 | 584 | down_write(&nvm_lock); |
b7692076 MB |
585 | if (ret > 0) |
586 | dev->mt = nvm_init_mgr(dev); | |
edad2e66 MB |
587 | list_add(&dev->devices, &nvm_devices); |
588 | up_write(&nvm_lock); | |
589 | ||
cd9e9808 MB |
590 | return 0; |
591 | err_init: | |
592 | kfree(dev); | |
593 | return ret; | |
594 | } | |
595 | EXPORT_SYMBOL(nvm_register); | |
596 | ||
597 | void nvm_unregister(char *disk_name) | |
598 | { | |
d0a712ce | 599 | struct nvm_dev *dev; |
cd9e9808 | 600 | |
d0a712ce WT |
601 | down_write(&nvm_lock); |
602 | dev = nvm_find_nvm_dev(disk_name); | |
cd9e9808 MB |
603 | if (!dev) { |
604 | pr_err("nvm: could not find device %s to unregister\n", | |
605 | disk_name); | |
d0a712ce | 606 | up_write(&nvm_lock); |
cd9e9808 MB |
607 | return; |
608 | } | |
609 | ||
cd9e9808 MB |
610 | list_del(&dev->devices); |
611 | up_write(&nvm_lock); | |
c1480ad5 MB |
612 | |
613 | nvm_exit(dev); | |
614 | kfree(dev); | |
cd9e9808 MB |
615 | } |
616 | EXPORT_SYMBOL(nvm_unregister); | |
617 | ||
618 | static const struct block_device_operations nvm_fops = { | |
619 | .owner = THIS_MODULE, | |
620 | }; | |
621 | ||
622 | static int nvm_create_target(struct nvm_dev *dev, | |
623 | struct nvm_ioctl_create *create) | |
624 | { | |
625 | struct nvm_ioctl_create_simple *s = &create->conf.s; | |
626 | struct request_queue *tqueue; | |
cd9e9808 MB |
627 | struct gendisk *tdisk; |
628 | struct nvm_tgt_type *tt; | |
629 | struct nvm_target *t; | |
630 | void *targetdata; | |
cd9e9808 MB |
631 | |
632 | if (!dev->mt) { | |
762796bc MB |
633 | pr_info("nvm: device has no media manager registered.\n"); |
634 | return -ENODEV; | |
cd9e9808 MB |
635 | } |
636 | ||
762796bc | 637 | down_write(&nvm_lock); |
cd9e9808 MB |
638 | tt = nvm_find_target_type(create->tgttype); |
639 | if (!tt) { | |
640 | pr_err("nvm: target type %s not found\n", create->tgttype); | |
d0a712ce | 641 | up_write(&nvm_lock); |
cd9e9808 MB |
642 | return -EINVAL; |
643 | } | |
644 | ||
cd9e9808 MB |
645 | list_for_each_entry(t, &dev->online_targets, list) { |
646 | if (!strcmp(create->tgtname, t->disk->disk_name)) { | |
647 | pr_err("nvm: target name already exists.\n"); | |
648 | up_write(&nvm_lock); | |
649 | return -EINVAL; | |
650 | } | |
651 | } | |
652 | up_write(&nvm_lock); | |
653 | ||
654 | t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); | |
655 | if (!t) | |
656 | return -ENOMEM; | |
657 | ||
658 | tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node); | |
659 | if (!tqueue) | |
660 | goto err_t; | |
661 | blk_queue_make_request(tqueue, tt->make_rq); | |
662 | ||
663 | tdisk = alloc_disk(0); | |
664 | if (!tdisk) | |
665 | goto err_queue; | |
666 | ||
667 | sprintf(tdisk->disk_name, "%s", create->tgtname); | |
668 | tdisk->flags = GENHD_FL_EXT_DEVT; | |
669 | tdisk->major = 0; | |
670 | tdisk->first_minor = 0; | |
671 | tdisk->fops = &nvm_fops; | |
672 | tdisk->queue = tqueue; | |
673 | ||
674 | targetdata = tt->init(dev, tdisk, s->lun_begin, s->lun_end); | |
675 | if (IS_ERR(targetdata)) | |
676 | goto err_init; | |
677 | ||
678 | tdisk->private_data = targetdata; | |
679 | tqueue->queuedata = targetdata; | |
680 | ||
681 | blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect); | |
682 | ||
683 | set_capacity(tdisk, tt->capacity(targetdata)); | |
684 | add_disk(tdisk); | |
685 | ||
686 | t->type = tt; | |
687 | t->disk = tdisk; | |
688 | ||
689 | down_write(&nvm_lock); | |
690 | list_add_tail(&t->list, &dev->online_targets); | |
691 | up_write(&nvm_lock); | |
692 | ||
693 | return 0; | |
694 | err_init: | |
695 | put_disk(tdisk); | |
696 | err_queue: | |
697 | blk_cleanup_queue(tqueue); | |
698 | err_t: | |
699 | kfree(t); | |
700 | return -ENOMEM; | |
701 | } | |
702 | ||
703 | static void nvm_remove_target(struct nvm_target *t) | |
704 | { | |
705 | struct nvm_tgt_type *tt = t->type; | |
706 | struct gendisk *tdisk = t->disk; | |
707 | struct request_queue *q = tdisk->queue; | |
708 | ||
709 | lockdep_assert_held(&nvm_lock); | |
710 | ||
711 | del_gendisk(tdisk); | |
d09f9581 JG |
712 | blk_cleanup_queue(q); |
713 | ||
cd9e9808 MB |
714 | if (tt->exit) |
715 | tt->exit(tdisk->private_data); | |
716 | ||
cd9e9808 MB |
717 | put_disk(tdisk); |
718 | ||
719 | list_del(&t->list); | |
720 | kfree(t); | |
721 | } | |
722 | ||
723 | static int __nvm_configure_create(struct nvm_ioctl_create *create) | |
724 | { | |
725 | struct nvm_dev *dev; | |
726 | struct nvm_ioctl_create_simple *s; | |
727 | ||
d0a712ce | 728 | down_write(&nvm_lock); |
cd9e9808 | 729 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 730 | up_write(&nvm_lock); |
cd9e9808 MB |
731 | if (!dev) { |
732 | pr_err("nvm: device not found\n"); | |
733 | return -EINVAL; | |
734 | } | |
735 | ||
736 | if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) { | |
737 | pr_err("nvm: config type not valid\n"); | |
738 | return -EINVAL; | |
739 | } | |
740 | s = &create->conf.s; | |
741 | ||
742 | if (s->lun_begin > s->lun_end || s->lun_end > dev->nr_luns) { | |
743 | pr_err("nvm: lun out of bound (%u:%u > %u)\n", | |
744 | s->lun_begin, s->lun_end, dev->nr_luns); | |
745 | return -EINVAL; | |
746 | } | |
747 | ||
748 | return nvm_create_target(dev, create); | |
749 | } | |
750 | ||
751 | static int __nvm_configure_remove(struct nvm_ioctl_remove *remove) | |
752 | { | |
753 | struct nvm_target *t = NULL; | |
754 | struct nvm_dev *dev; | |
755 | int ret = -1; | |
756 | ||
757 | down_write(&nvm_lock); | |
758 | list_for_each_entry(dev, &nvm_devices, devices) | |
759 | list_for_each_entry(t, &dev->online_targets, list) { | |
760 | if (!strcmp(remove->tgtname, t->disk->disk_name)) { | |
761 | nvm_remove_target(t); | |
762 | ret = 0; | |
763 | break; | |
764 | } | |
765 | } | |
766 | up_write(&nvm_lock); | |
767 | ||
768 | if (ret) { | |
769 | pr_err("nvm: target \"%s\" doesn't exist.\n", remove->tgtname); | |
770 | return -EINVAL; | |
771 | } | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
776 | #ifdef CONFIG_NVM_DEBUG | |
777 | static int nvm_configure_show(const char *val) | |
778 | { | |
779 | struct nvm_dev *dev; | |
780 | char opcode, devname[DISK_NAME_LEN]; | |
781 | int ret; | |
782 | ||
783 | ret = sscanf(val, "%c %32s", &opcode, devname); | |
784 | if (ret != 2) { | |
785 | pr_err("nvm: invalid command. Use \"opcode devicename\".\n"); | |
786 | return -EINVAL; | |
787 | } | |
788 | ||
d0a712ce | 789 | down_write(&nvm_lock); |
cd9e9808 | 790 | dev = nvm_find_nvm_dev(devname); |
d0a712ce | 791 | up_write(&nvm_lock); |
cd9e9808 MB |
792 | if (!dev) { |
793 | pr_err("nvm: device not found\n"); | |
794 | return -EINVAL; | |
795 | } | |
796 | ||
797 | if (!dev->mt) | |
798 | return 0; | |
799 | ||
2fde0e48 | 800 | dev->mt->lun_info_print(dev); |
cd9e9808 MB |
801 | |
802 | return 0; | |
803 | } | |
804 | ||
805 | static int nvm_configure_remove(const char *val) | |
806 | { | |
807 | struct nvm_ioctl_remove remove; | |
808 | char opcode; | |
809 | int ret; | |
810 | ||
811 | ret = sscanf(val, "%c %256s", &opcode, remove.tgtname); | |
812 | if (ret != 2) { | |
813 | pr_err("nvm: invalid command. Use \"d targetname\".\n"); | |
814 | return -EINVAL; | |
815 | } | |
816 | ||
817 | remove.flags = 0; | |
818 | ||
819 | return __nvm_configure_remove(&remove); | |
820 | } | |
821 | ||
822 | static int nvm_configure_create(const char *val) | |
823 | { | |
824 | struct nvm_ioctl_create create; | |
825 | char opcode; | |
826 | int lun_begin, lun_end, ret; | |
827 | ||
828 | ret = sscanf(val, "%c %256s %256s %48s %u:%u", &opcode, create.dev, | |
829 | create.tgtname, create.tgttype, | |
830 | &lun_begin, &lun_end); | |
831 | if (ret != 6) { | |
832 | pr_err("nvm: invalid command. Use \"opcode device name tgttype lun_begin:lun_end\".\n"); | |
833 | return -EINVAL; | |
834 | } | |
835 | ||
836 | create.flags = 0; | |
837 | create.conf.type = NVM_CONFIG_TYPE_SIMPLE; | |
838 | create.conf.s.lun_begin = lun_begin; | |
839 | create.conf.s.lun_end = lun_end; | |
840 | ||
841 | return __nvm_configure_create(&create); | |
842 | } | |
843 | ||
844 | ||
845 | /* Exposes administrative interface through /sys/module/lnvm/configure_by_str */ | |
846 | static int nvm_configure_by_str_event(const char *val, | |
847 | const struct kernel_param *kp) | |
848 | { | |
849 | char opcode; | |
850 | int ret; | |
851 | ||
852 | ret = sscanf(val, "%c", &opcode); | |
853 | if (ret != 1) { | |
854 | pr_err("nvm: string must have the format of \"cmd ...\"\n"); | |
855 | return -EINVAL; | |
856 | } | |
857 | ||
858 | switch (opcode) { | |
859 | case 'a': | |
860 | return nvm_configure_create(val); | |
861 | case 'd': | |
862 | return nvm_configure_remove(val); | |
863 | case 's': | |
864 | return nvm_configure_show(val); | |
865 | default: | |
866 | pr_err("nvm: invalid command\n"); | |
867 | return -EINVAL; | |
868 | } | |
869 | ||
870 | return 0; | |
871 | } | |
872 | ||
873 | static int nvm_configure_get(char *buf, const struct kernel_param *kp) | |
874 | { | |
875 | int sz = 0; | |
876 | char *buf_start = buf; | |
877 | struct nvm_dev *dev; | |
878 | ||
879 | buf += sprintf(buf, "available devices:\n"); | |
880 | down_write(&nvm_lock); | |
881 | list_for_each_entry(dev, &nvm_devices, devices) { | |
882 | if (sz > 4095 - DISK_NAME_LEN) | |
883 | break; | |
884 | buf += sprintf(buf, " %32s\n", dev->name); | |
885 | } | |
886 | up_write(&nvm_lock); | |
887 | ||
888 | return buf - buf_start - 1; | |
889 | } | |
890 | ||
891 | static const struct kernel_param_ops nvm_configure_by_str_event_param_ops = { | |
892 | .set = nvm_configure_by_str_event, | |
893 | .get = nvm_configure_get, | |
894 | }; | |
895 | ||
896 | #undef MODULE_PARAM_PREFIX | |
897 | #define MODULE_PARAM_PREFIX "lnvm." | |
898 | ||
899 | module_param_cb(configure_debug, &nvm_configure_by_str_event_param_ops, NULL, | |
900 | 0644); | |
901 | ||
902 | #endif /* CONFIG_NVM_DEBUG */ | |
903 | ||
904 | static long nvm_ioctl_info(struct file *file, void __user *arg) | |
905 | { | |
906 | struct nvm_ioctl_info *info; | |
907 | struct nvm_tgt_type *tt; | |
908 | int tgt_iter = 0; | |
909 | ||
910 | if (!capable(CAP_SYS_ADMIN)) | |
911 | return -EPERM; | |
912 | ||
913 | info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); | |
914 | if (IS_ERR(info)) | |
915 | return -EFAULT; | |
916 | ||
917 | info->version[0] = NVM_VERSION_MAJOR; | |
918 | info->version[1] = NVM_VERSION_MINOR; | |
919 | info->version[2] = NVM_VERSION_PATCH; | |
920 | ||
921 | down_write(&nvm_lock); | |
922 | list_for_each_entry(tt, &nvm_targets, list) { | |
923 | struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; | |
924 | ||
925 | tgt->version[0] = tt->version[0]; | |
926 | tgt->version[1] = tt->version[1]; | |
927 | tgt->version[2] = tt->version[2]; | |
928 | strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); | |
929 | ||
930 | tgt_iter++; | |
931 | } | |
932 | ||
933 | info->tgtsize = tgt_iter; | |
934 | up_write(&nvm_lock); | |
935 | ||
76e25081 SM |
936 | if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { |
937 | kfree(info); | |
cd9e9808 | 938 | return -EFAULT; |
76e25081 | 939 | } |
cd9e9808 MB |
940 | |
941 | kfree(info); | |
942 | return 0; | |
943 | } | |
944 | ||
945 | static long nvm_ioctl_get_devices(struct file *file, void __user *arg) | |
946 | { | |
947 | struct nvm_ioctl_get_devices *devices; | |
948 | struct nvm_dev *dev; | |
949 | int i = 0; | |
950 | ||
951 | if (!capable(CAP_SYS_ADMIN)) | |
952 | return -EPERM; | |
953 | ||
954 | devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); | |
955 | if (!devices) | |
956 | return -ENOMEM; | |
957 | ||
958 | down_write(&nvm_lock); | |
959 | list_for_each_entry(dev, &nvm_devices, devices) { | |
960 | struct nvm_ioctl_device_info *info = &devices->info[i]; | |
961 | ||
962 | sprintf(info->devname, "%s", dev->name); | |
963 | if (dev->mt) { | |
964 | info->bmversion[0] = dev->mt->version[0]; | |
965 | info->bmversion[1] = dev->mt->version[1]; | |
966 | info->bmversion[2] = dev->mt->version[2]; | |
967 | sprintf(info->bmname, "%s", dev->mt->name); | |
968 | } else { | |
969 | sprintf(info->bmname, "none"); | |
970 | } | |
971 | ||
972 | i++; | |
973 | if (i > 31) { | |
974 | pr_err("nvm: max 31 devices can be reported.\n"); | |
975 | break; | |
976 | } | |
977 | } | |
978 | up_write(&nvm_lock); | |
979 | ||
980 | devices->nr_devices = i; | |
981 | ||
76e25081 SM |
982 | if (copy_to_user(arg, devices, |
983 | sizeof(struct nvm_ioctl_get_devices))) { | |
984 | kfree(devices); | |
cd9e9808 | 985 | return -EFAULT; |
76e25081 | 986 | } |
cd9e9808 MB |
987 | |
988 | kfree(devices); | |
989 | return 0; | |
990 | } | |
991 | ||
992 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
993 | { | |
994 | struct nvm_ioctl_create create; | |
995 | ||
996 | if (!capable(CAP_SYS_ADMIN)) | |
997 | return -EPERM; | |
998 | ||
999 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) | |
1000 | return -EFAULT; | |
1001 | ||
1002 | create.dev[DISK_NAME_LEN - 1] = '\0'; | |
1003 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
1004 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1005 | ||
1006 | if (create.flags != 0) { | |
1007 | pr_err("nvm: no flags supported\n"); | |
1008 | return -EINVAL; | |
1009 | } | |
1010 | ||
1011 | return __nvm_configure_create(&create); | |
1012 | } | |
1013 | ||
1014 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
1015 | { | |
1016 | struct nvm_ioctl_remove remove; | |
1017 | ||
1018 | if (!capable(CAP_SYS_ADMIN)) | |
1019 | return -EPERM; | |
1020 | ||
1021 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) | |
1022 | return -EFAULT; | |
1023 | ||
1024 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1025 | ||
1026 | if (remove.flags != 0) { | |
1027 | pr_err("nvm: no flags supported\n"); | |
1028 | return -EINVAL; | |
1029 | } | |
1030 | ||
1031 | return __nvm_configure_remove(&remove); | |
1032 | } | |
1033 | ||
55696154 MB |
1034 | static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info) |
1035 | { | |
1036 | info->seqnr = 1; | |
1037 | info->erase_cnt = 0; | |
1038 | info->version = 1; | |
1039 | } | |
1040 | ||
1041 | static long __nvm_ioctl_dev_init(struct nvm_ioctl_dev_init *init) | |
1042 | { | |
1043 | struct nvm_dev *dev; | |
1044 | struct nvm_sb_info info; | |
b7692076 | 1045 | int ret; |
55696154 MB |
1046 | |
1047 | down_write(&nvm_lock); | |
1048 | dev = nvm_find_nvm_dev(init->dev); | |
1049 | up_write(&nvm_lock); | |
1050 | if (!dev) { | |
1051 | pr_err("nvm: device not found\n"); | |
1052 | return -EINVAL; | |
1053 | } | |
1054 | ||
1055 | nvm_setup_nvm_sb_info(&info); | |
1056 | ||
1057 | strncpy(info.mmtype, init->mmtype, NVM_MMTYPE_LEN); | |
1058 | info.fs_ppa.ppa = -1; | |
1059 | ||
bf643185 MB |
1060 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) { |
1061 | ret = nvm_init_sysblock(dev, &info); | |
1062 | if (ret) | |
1063 | return ret; | |
1064 | } | |
b7692076 MB |
1065 | |
1066 | memcpy(&dev->sb, &info, sizeof(struct nvm_sb_info)); | |
1067 | ||
1068 | down_write(&nvm_lock); | |
1069 | dev->mt = nvm_init_mgr(dev); | |
1070 | up_write(&nvm_lock); | |
1071 | ||
1072 | return 0; | |
55696154 MB |
1073 | } |
1074 | ||
1075 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) | |
1076 | { | |
1077 | struct nvm_ioctl_dev_init init; | |
1078 | ||
1079 | if (!capable(CAP_SYS_ADMIN)) | |
1080 | return -EPERM; | |
1081 | ||
1082 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) | |
1083 | return -EFAULT; | |
1084 | ||
1085 | if (init.flags != 0) { | |
1086 | pr_err("nvm: no flags supported\n"); | |
1087 | return -EINVAL; | |
1088 | } | |
1089 | ||
1090 | init.dev[DISK_NAME_LEN - 1] = '\0'; | |
1091 | ||
1092 | return __nvm_ioctl_dev_init(&init); | |
1093 | } | |
1094 | ||
8b4970c4 MB |
1095 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
1096 | { | |
1097 | struct nvm_ioctl_dev_factory fact; | |
1098 | struct nvm_dev *dev; | |
1099 | ||
1100 | if (!capable(CAP_SYS_ADMIN)) | |
1101 | return -EPERM; | |
1102 | ||
1103 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) | |
1104 | return -EFAULT; | |
1105 | ||
1106 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1107 | ||
1108 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1109 | return -EINVAL; | |
1110 | ||
1111 | down_write(&nvm_lock); | |
1112 | dev = nvm_find_nvm_dev(fact.dev); | |
1113 | up_write(&nvm_lock); | |
1114 | if (!dev) { | |
1115 | pr_err("nvm: device not found\n"); | |
1116 | return -EINVAL; | |
1117 | } | |
1118 | ||
1119 | if (dev->mt) { | |
1120 | dev->mt->unregister_mgr(dev); | |
1121 | dev->mt = NULL; | |
1122 | } | |
1123 | ||
bf643185 MB |
1124 | if (dev->identity.cap & NVM_ID_DCAP_BBLKMGMT) |
1125 | return nvm_dev_factory(dev, fact.flags); | |
1126 | ||
1127 | return 0; | |
8b4970c4 MB |
1128 | } |
1129 | ||
cd9e9808 MB |
1130 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1131 | { | |
1132 | void __user *argp = (void __user *)arg; | |
1133 | ||
1134 | switch (cmd) { | |
1135 | case NVM_INFO: | |
1136 | return nvm_ioctl_info(file, argp); | |
1137 | case NVM_GET_DEVICES: | |
1138 | return nvm_ioctl_get_devices(file, argp); | |
1139 | case NVM_DEV_CREATE: | |
1140 | return nvm_ioctl_dev_create(file, argp); | |
1141 | case NVM_DEV_REMOVE: | |
1142 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1143 | case NVM_DEV_INIT: |
1144 | return nvm_ioctl_dev_init(file, argp); | |
8b4970c4 MB |
1145 | case NVM_DEV_FACTORY: |
1146 | return nvm_ioctl_dev_factory(file, argp); | |
cd9e9808 MB |
1147 | } |
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | static const struct file_operations _ctl_fops = { | |
1152 | .open = nonseekable_open, | |
1153 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1154 | .owner = THIS_MODULE, | |
1155 | .llseek = noop_llseek, | |
1156 | }; | |
1157 | ||
1158 | static struct miscdevice _nvm_misc = { | |
1159 | .minor = MISC_DYNAMIC_MINOR, | |
1160 | .name = "lightnvm", | |
1161 | .nodename = "lightnvm/control", | |
1162 | .fops = &_ctl_fops, | |
1163 | }; | |
1164 | ||
1165 | MODULE_ALIAS_MISCDEV(MISC_DYNAMIC_MINOR); | |
1166 | ||
1167 | static int __init nvm_mod_init(void) | |
1168 | { | |
1169 | int ret; | |
1170 | ||
1171 | ret = misc_register(&_nvm_misc); | |
1172 | if (ret) | |
1173 | pr_err("nvm: misc_register failed for control device"); | |
1174 | ||
1175 | return ret; | |
1176 | } | |
1177 | ||
1178 | static void __exit nvm_mod_exit(void) | |
1179 | { | |
1180 | misc_deregister(&_nvm_misc); | |
1181 | } | |
1182 | ||
1183 | MODULE_AUTHOR("Matias Bjorling <m@bjorling.me>"); | |
1184 | MODULE_LICENSE("GPL v2"); | |
1185 | MODULE_VERSION("0.1"); | |
1186 | module_init(nvm_mod_init); | |
1187 | module_exit(nvm_mod_exit); |