Commit | Line | Data |
---|---|---|
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> | |
90014829 | 25 | #include <linux/module.h> |
389b2a1c | 26 | #include <linux/moduleparam.h> |
cd9e9808 MB |
27 | #include <linux/miscdevice.h> |
28 | #include <linux/lightnvm.h> | |
91276162 | 29 | #include <linux/sched/sysctl.h> |
cd9e9808 | 30 | |
6063fe39 | 31 | static LIST_HEAD(nvm_tgt_types); |
5cd90785 | 32 | static DECLARE_RWSEM(nvm_tgtt_lock); |
cd9e9808 MB |
33 | static LIST_HEAD(nvm_devices); |
34 | static DECLARE_RWSEM(nvm_lock); | |
35 | ||
ade69e24 MB |
36 | /* Map between virtual and physical channel and lun */ |
37 | struct nvm_ch_map { | |
38 | int ch_off; | |
39 | int nr_luns; | |
40 | int *lun_offs; | |
41 | }; | |
42 | ||
43 | struct nvm_dev_map { | |
44 | struct nvm_ch_map *chnls; | |
45 | int nr_chnls; | |
46 | }; | |
47 | ||
ade69e24 MB |
48 | static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name) |
49 | { | |
50 | struct nvm_target *tgt; | |
51 | ||
52 | list_for_each_entry(tgt, &dev->targets, list) | |
53 | if (!strcmp(name, tgt->disk->disk_name)) | |
54 | return tgt; | |
55 | ||
56 | return NULL; | |
57 | } | |
58 | ||
bd77b23b JG |
59 | static bool nvm_target_exists(const char *name) |
60 | { | |
61 | struct nvm_dev *dev; | |
62 | struct nvm_target *tgt; | |
63 | bool ret = false; | |
64 | ||
65 | down_write(&nvm_lock); | |
66 | list_for_each_entry(dev, &nvm_devices, devices) { | |
67 | mutex_lock(&dev->mlock); | |
68 | list_for_each_entry(tgt, &dev->targets, list) { | |
69 | if (!strcmp(name, tgt->disk->disk_name)) { | |
70 | ret = true; | |
71 | mutex_unlock(&dev->mlock); | |
72 | goto out; | |
73 | } | |
74 | } | |
75 | mutex_unlock(&dev->mlock); | |
76 | } | |
77 | ||
78 | out: | |
79 | up_write(&nvm_lock); | |
80 | return ret; | |
81 | } | |
82 | ||
ade69e24 MB |
83 | static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end) |
84 | { | |
85 | int i; | |
86 | ||
87 | for (i = lun_begin; i <= lun_end; i++) { | |
88 | if (test_and_set_bit(i, dev->lun_map)) { | |
89 | pr_err("nvm: lun %d already allocated\n", i); | |
90 | goto err; | |
91 | } | |
92 | } | |
93 | ||
94 | return 0; | |
95 | err: | |
507f7d68 | 96 | while (--i >= lun_begin) |
ade69e24 MB |
97 | clear_bit(i, dev->lun_map); |
98 | ||
99 | return -EBUSY; | |
100 | } | |
101 | ||
102 | static void nvm_release_luns_err(struct nvm_dev *dev, int lun_begin, | |
103 | int lun_end) | |
104 | { | |
105 | int i; | |
106 | ||
107 | for (i = lun_begin; i <= lun_end; i++) | |
108 | WARN_ON(!test_and_clear_bit(i, dev->lun_map)); | |
109 | } | |
110 | ||
edee1bdd | 111 | static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev, int clear) |
ade69e24 MB |
112 | { |
113 | struct nvm_dev *dev = tgt_dev->parent; | |
114 | struct nvm_dev_map *dev_map = tgt_dev->map; | |
115 | int i, j; | |
116 | ||
117 | for (i = 0; i < dev_map->nr_chnls; i++) { | |
118 | struct nvm_ch_map *ch_map = &dev_map->chnls[i]; | |
119 | int *lun_offs = ch_map->lun_offs; | |
120 | int ch = i + ch_map->ch_off; | |
121 | ||
edee1bdd JG |
122 | if (clear) { |
123 | for (j = 0; j < ch_map->nr_luns; j++) { | |
124 | int lun = j + lun_offs[j]; | |
fae7fae4 | 125 | int lunid = (ch * dev->geo.nr_luns) + lun; |
ade69e24 | 126 | |
edee1bdd JG |
127 | WARN_ON(!test_and_clear_bit(lunid, |
128 | dev->lun_map)); | |
129 | } | |
ade69e24 MB |
130 | } |
131 | ||
132 | kfree(ch_map->lun_offs); | |
133 | } | |
134 | ||
135 | kfree(dev_map->chnls); | |
136 | kfree(dev_map); | |
137 | ||
138 | kfree(tgt_dev->luns); | |
139 | kfree(tgt_dev); | |
140 | } | |
141 | ||
142 | static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev, | |
e5392739 JG |
143 | u16 lun_begin, u16 lun_end, |
144 | u16 op) | |
ade69e24 MB |
145 | { |
146 | struct nvm_tgt_dev *tgt_dev = NULL; | |
147 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
148 | struct nvm_dev_map *dev_map; | |
149 | struct ppa_addr *luns; | |
150 | int nr_luns = lun_end - lun_begin + 1; | |
151 | int luns_left = nr_luns; | |
fae7fae4 MB |
152 | int nr_chnls = nr_luns / dev->geo.nr_luns; |
153 | int nr_chnls_mod = nr_luns % dev->geo.nr_luns; | |
154 | int bch = lun_begin / dev->geo.nr_luns; | |
155 | int blun = lun_begin % dev->geo.nr_luns; | |
ade69e24 MB |
156 | int lunid = 0; |
157 | int lun_balanced = 1; | |
158 | int prev_nr_luns; | |
159 | int i, j; | |
160 | ||
ade69e24 MB |
161 | nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1; |
162 | ||
163 | dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
164 | if (!dev_map) | |
165 | goto err_dev; | |
166 | ||
167 | dev_map->chnls = kcalloc(nr_chnls, sizeof(struct nvm_ch_map), | |
168 | GFP_KERNEL); | |
169 | if (!dev_map->chnls) | |
170 | goto err_chnls; | |
171 | ||
172 | luns = kcalloc(nr_luns, sizeof(struct ppa_addr), GFP_KERNEL); | |
173 | if (!luns) | |
174 | goto err_luns; | |
175 | ||
fae7fae4 MB |
176 | prev_nr_luns = (luns_left > dev->geo.nr_luns) ? |
177 | dev->geo.nr_luns : luns_left; | |
ade69e24 MB |
178 | for (i = 0; i < nr_chnls; i++) { |
179 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch]; | |
180 | int *lun_roffs = ch_rmap->lun_offs; | |
181 | struct nvm_ch_map *ch_map = &dev_map->chnls[i]; | |
182 | int *lun_offs; | |
fae7fae4 MB |
183 | int luns_in_chnl = (luns_left > dev->geo.nr_luns) ? |
184 | dev->geo.nr_luns : luns_left; | |
ade69e24 MB |
185 | |
186 | if (lun_balanced && prev_nr_luns != luns_in_chnl) | |
187 | lun_balanced = 0; | |
188 | ||
189 | ch_map->ch_off = ch_rmap->ch_off = bch; | |
190 | ch_map->nr_luns = luns_in_chnl; | |
191 | ||
192 | lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
193 | if (!lun_offs) | |
194 | goto err_ch; | |
195 | ||
196 | for (j = 0; j < luns_in_chnl; j++) { | |
197 | luns[lunid].ppa = 0; | |
198 | luns[lunid].g.ch = i; | |
199 | luns[lunid++].g.lun = j; | |
200 | ||
201 | lun_offs[j] = blun; | |
202 | lun_roffs[j + blun] = blun; | |
203 | } | |
204 | ||
205 | ch_map->lun_offs = lun_offs; | |
206 | ||
207 | /* when starting a new channel, lun offset is reset */ | |
208 | blun = 0; | |
209 | luns_left -= luns_in_chnl; | |
210 | } | |
211 | ||
212 | dev_map->nr_chnls = nr_chnls; | |
213 | ||
214 | tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL); | |
215 | if (!tgt_dev) | |
216 | goto err_ch; | |
217 | ||
218 | memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo)); | |
219 | /* Target device only owns a portion of the physical device */ | |
220 | tgt_dev->geo.nr_chnls = nr_chnls; | |
fae7fae4 MB |
221 | tgt_dev->geo.all_luns = nr_luns; |
222 | tgt_dev->geo.nr_luns = (lun_balanced) ? prev_nr_luns : -1; | |
e5392739 | 223 | tgt_dev->geo.op = op; |
ade69e24 MB |
224 | tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun; |
225 | tgt_dev->q = dev->q; | |
226 | tgt_dev->map = dev_map; | |
227 | tgt_dev->luns = luns; | |
228 | memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id)); | |
229 | ||
230 | tgt_dev->parent = dev; | |
231 | ||
232 | return tgt_dev; | |
233 | err_ch: | |
507f7d68 | 234 | while (--i >= 0) |
ade69e24 MB |
235 | kfree(dev_map->chnls[i].lun_offs); |
236 | kfree(luns); | |
237 | err_luns: | |
238 | kfree(dev_map->chnls); | |
239 | err_chnls: | |
240 | kfree(dev_map); | |
241 | err_dev: | |
242 | return tgt_dev; | |
243 | } | |
244 | ||
245 | static const struct block_device_operations nvm_fops = { | |
246 | .owner = THIS_MODULE, | |
247 | }; | |
248 | ||
e29c80e6 | 249 | static struct nvm_tgt_type *__nvm_find_target_type(const char *name) |
eb6f168f | 250 | { |
e29c80e6 | 251 | struct nvm_tgt_type *tt; |
eb6f168f | 252 | |
e29c80e6 JG |
253 | list_for_each_entry(tt, &nvm_tgt_types, list) |
254 | if (!strcmp(name, tt->name)) | |
255 | return tt; | |
eb6f168f | 256 | |
e29c80e6 JG |
257 | return NULL; |
258 | } | |
259 | ||
260 | static struct nvm_tgt_type *nvm_find_target_type(const char *name) | |
261 | { | |
262 | struct nvm_tgt_type *tt; | |
263 | ||
264 | down_write(&nvm_tgtt_lock); | |
265 | tt = __nvm_find_target_type(name); | |
266 | up_write(&nvm_tgtt_lock); | |
eb6f168f | 267 | |
eb6f168f RP |
268 | return tt; |
269 | } | |
270 | ||
e5392739 JG |
271 | static int nvm_config_check_luns(struct nvm_geo *geo, int lun_begin, |
272 | int lun_end) | |
273 | { | |
274 | if (lun_begin > lun_end || lun_end >= geo->all_luns) { | |
275 | pr_err("nvm: lun out of bound (%u:%u > %u)\n", | |
276 | lun_begin, lun_end, geo->all_luns - 1); | |
277 | return -EINVAL; | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int __nvm_config_simple(struct nvm_dev *dev, | |
284 | struct nvm_ioctl_create_simple *s) | |
285 | { | |
286 | struct nvm_geo *geo = &dev->geo; | |
287 | ||
288 | if (s->lun_begin == -1 && s->lun_end == -1) { | |
289 | s->lun_begin = 0; | |
290 | s->lun_end = geo->all_luns - 1; | |
291 | } | |
292 | ||
293 | return nvm_config_check_luns(geo, s->lun_begin, s->lun_end); | |
294 | } | |
295 | ||
296 | static int __nvm_config_extended(struct nvm_dev *dev, | |
297 | struct nvm_ioctl_create_extended *e) | |
298 | { | |
299 | struct nvm_geo *geo = &dev->geo; | |
300 | ||
301 | if (e->lun_begin == 0xFFFF && e->lun_end == 0xFFFF) { | |
302 | e->lun_begin = 0; | |
303 | e->lun_end = dev->geo.all_luns - 1; | |
304 | } | |
305 | ||
306 | /* op not set falls into target's default */ | |
307 | if (e->op == 0xFFFF) | |
308 | e->op = NVM_TARGET_DEFAULT_OP; | |
309 | ||
310 | if (e->op < NVM_TARGET_MIN_OP || | |
311 | e->op > NVM_TARGET_MAX_OP) { | |
312 | pr_err("nvm: invalid over provisioning value\n"); | |
313 | return -EINVAL; | |
314 | } | |
315 | ||
316 | return nvm_config_check_luns(geo, e->lun_begin, e->lun_end); | |
317 | } | |
318 | ||
ade69e24 MB |
319 | static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) |
320 | { | |
e5392739 | 321 | struct nvm_ioctl_create_extended e; |
ade69e24 MB |
322 | struct request_queue *tqueue; |
323 | struct gendisk *tdisk; | |
324 | struct nvm_tgt_type *tt; | |
325 | struct nvm_target *t; | |
326 | struct nvm_tgt_dev *tgt_dev; | |
327 | void *targetdata; | |
8d77bb82 | 328 | int ret; |
ade69e24 | 329 | |
e5392739 JG |
330 | switch (create->conf.type) { |
331 | case NVM_CONFIG_TYPE_SIMPLE: | |
332 | ret = __nvm_config_simple(dev, &create->conf.s); | |
333 | if (ret) | |
334 | return ret; | |
335 | ||
336 | e.lun_begin = create->conf.s.lun_begin; | |
337 | e.lun_end = create->conf.s.lun_end; | |
338 | e.op = NVM_TARGET_DEFAULT_OP; | |
339 | break; | |
340 | case NVM_CONFIG_TYPE_EXTENDED: | |
341 | ret = __nvm_config_extended(dev, &create->conf.e); | |
342 | if (ret) | |
343 | return ret; | |
344 | ||
345 | e = create->conf.e; | |
346 | break; | |
347 | default: | |
348 | pr_err("nvm: config type not valid\n"); | |
349 | return -EINVAL; | |
350 | } | |
351 | ||
e29c80e6 | 352 | tt = nvm_find_target_type(create->tgttype); |
ade69e24 MB |
353 | if (!tt) { |
354 | pr_err("nvm: target type %s not found\n", create->tgttype); | |
355 | return -EINVAL; | |
356 | } | |
357 | ||
bd77b23b JG |
358 | if (nvm_target_exists(create->tgtname)) { |
359 | pr_err("nvm: target name already exists (%s)\n", | |
360 | create->tgtname); | |
ade69e24 MB |
361 | return -EINVAL; |
362 | } | |
ade69e24 | 363 | |
e5392739 | 364 | ret = nvm_reserve_luns(dev, e.lun_begin, e.lun_end); |
12e9a6d6 RP |
365 | if (ret) |
366 | return ret; | |
ade69e24 MB |
367 | |
368 | t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); | |
8d77bb82 RP |
369 | if (!t) { |
370 | ret = -ENOMEM; | |
ade69e24 | 371 | goto err_reserve; |
8d77bb82 | 372 | } |
ade69e24 | 373 | |
e5392739 | 374 | tgt_dev = nvm_create_tgt_dev(dev, e.lun_begin, e.lun_end, e.op); |
ade69e24 MB |
375 | if (!tgt_dev) { |
376 | pr_err("nvm: could not create target device\n"); | |
8d77bb82 | 377 | ret = -ENOMEM; |
ade69e24 MB |
378 | goto err_t; |
379 | } | |
380 | ||
7d1ef2f4 | 381 | tdisk = alloc_disk(0); |
8d77bb82 RP |
382 | if (!tdisk) { |
383 | ret = -ENOMEM; | |
7d1ef2f4 | 384 | goto err_dev; |
8d77bb82 | 385 | } |
7d1ef2f4 | 386 | |
5ee0524b | 387 | tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node, NULL); |
8d77bb82 RP |
388 | if (!tqueue) { |
389 | ret = -ENOMEM; | |
7d1ef2f4 | 390 | goto err_disk; |
8d77bb82 | 391 | } |
ade69e24 MB |
392 | blk_queue_make_request(tqueue, tt->make_rq); |
393 | ||
6eb08245 | 394 | strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name)); |
ade69e24 MB |
395 | tdisk->flags = GENHD_FL_EXT_DEVT; |
396 | tdisk->major = 0; | |
397 | tdisk->first_minor = 0; | |
398 | tdisk->fops = &nvm_fops; | |
399 | tdisk->queue = tqueue; | |
400 | ||
4af3f75d | 401 | targetdata = tt->init(tgt_dev, tdisk, create->flags); |
8d77bb82 RP |
402 | if (IS_ERR(targetdata)) { |
403 | ret = PTR_ERR(targetdata); | |
ade69e24 | 404 | goto err_init; |
8d77bb82 | 405 | } |
ade69e24 MB |
406 | |
407 | tdisk->private_data = targetdata; | |
408 | tqueue->queuedata = targetdata; | |
409 | ||
89a09c56 MB |
410 | blk_queue_max_hw_sectors(tqueue, |
411 | (dev->geo.sec_size >> 9) * NVM_MAX_VLBA); | |
ade69e24 MB |
412 | |
413 | set_capacity(tdisk, tt->capacity(targetdata)); | |
414 | add_disk(tdisk); | |
415 | ||
8d77bb82 RP |
416 | if (tt->sysfs_init && tt->sysfs_init(tdisk)) { |
417 | ret = -ENOMEM; | |
9a69b0ed | 418 | goto err_sysfs; |
8d77bb82 | 419 | } |
9a69b0ed | 420 | |
ade69e24 MB |
421 | t->type = tt; |
422 | t->disk = tdisk; | |
423 | t->dev = tgt_dev; | |
424 | ||
425 | mutex_lock(&dev->mlock); | |
426 | list_add_tail(&t->list, &dev->targets); | |
427 | mutex_unlock(&dev->mlock); | |
428 | ||
90014829 RP |
429 | __module_get(tt->owner); |
430 | ||
ade69e24 | 431 | return 0; |
9a69b0ed JG |
432 | err_sysfs: |
433 | if (tt->exit) | |
434 | tt->exit(targetdata); | |
ade69e24 | 435 | err_init: |
ade69e24 | 436 | blk_cleanup_queue(tqueue); |
75ba4ada | 437 | tdisk->queue = NULL; |
7d1ef2f4 JG |
438 | err_disk: |
439 | put_disk(tdisk); | |
ade69e24 | 440 | err_dev: |
edee1bdd | 441 | nvm_remove_tgt_dev(tgt_dev, 0); |
ade69e24 MB |
442 | err_t: |
443 | kfree(t); | |
444 | err_reserve: | |
e5392739 | 445 | nvm_release_luns_err(dev, e.lun_begin, e.lun_end); |
8d77bb82 | 446 | return ret; |
ade69e24 MB |
447 | } |
448 | ||
449 | static void __nvm_remove_target(struct nvm_target *t) | |
450 | { | |
451 | struct nvm_tgt_type *tt = t->type; | |
452 | struct gendisk *tdisk = t->disk; | |
453 | struct request_queue *q = tdisk->queue; | |
454 | ||
455 | del_gendisk(tdisk); | |
456 | blk_cleanup_queue(q); | |
457 | ||
9a69b0ed JG |
458 | if (tt->sysfs_exit) |
459 | tt->sysfs_exit(tdisk); | |
460 | ||
ade69e24 MB |
461 | if (tt->exit) |
462 | tt->exit(tdisk->private_data); | |
463 | ||
edee1bdd | 464 | nvm_remove_tgt_dev(t->dev, 1); |
ade69e24 | 465 | put_disk(tdisk); |
90014829 | 466 | module_put(t->type->owner); |
ade69e24 MB |
467 | |
468 | list_del(&t->list); | |
469 | kfree(t); | |
470 | } | |
471 | ||
472 | /** | |
473 | * nvm_remove_tgt - Removes a target from the media manager | |
474 | * @dev: device | |
475 | * @remove: ioctl structure with target name to remove. | |
476 | * | |
477 | * Returns: | |
478 | * 0: on success | |
479 | * 1: on not found | |
480 | * <0: on error | |
481 | */ | |
482 | static int nvm_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove) | |
483 | { | |
484 | struct nvm_target *t; | |
485 | ||
486 | mutex_lock(&dev->mlock); | |
487 | t = nvm_find_target(dev, remove->tgtname); | |
488 | if (!t) { | |
489 | mutex_unlock(&dev->mlock); | |
490 | return 1; | |
491 | } | |
492 | __nvm_remove_target(t); | |
493 | mutex_unlock(&dev->mlock); | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | static int nvm_register_map(struct nvm_dev *dev) | |
499 | { | |
500 | struct nvm_dev_map *rmap; | |
501 | int i, j; | |
502 | ||
503 | rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
504 | if (!rmap) | |
505 | goto err_rmap; | |
506 | ||
507 | rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct nvm_ch_map), | |
508 | GFP_KERNEL); | |
509 | if (!rmap->chnls) | |
510 | goto err_chnls; | |
511 | ||
512 | for (i = 0; i < dev->geo.nr_chnls; i++) { | |
513 | struct nvm_ch_map *ch_rmap; | |
514 | int *lun_roffs; | |
fae7fae4 | 515 | int luns_in_chnl = dev->geo.nr_luns; |
ade69e24 MB |
516 | |
517 | ch_rmap = &rmap->chnls[i]; | |
518 | ||
519 | ch_rmap->ch_off = -1; | |
520 | ch_rmap->nr_luns = luns_in_chnl; | |
521 | ||
522 | lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
523 | if (!lun_roffs) | |
524 | goto err_ch; | |
525 | ||
526 | for (j = 0; j < luns_in_chnl; j++) | |
527 | lun_roffs[j] = -1; | |
528 | ||
529 | ch_rmap->lun_offs = lun_roffs; | |
530 | } | |
531 | ||
532 | dev->rmap = rmap; | |
533 | ||
534 | return 0; | |
535 | err_ch: | |
536 | while (--i >= 0) | |
537 | kfree(rmap->chnls[i].lun_offs); | |
538 | err_chnls: | |
539 | kfree(rmap); | |
540 | err_rmap: | |
541 | return -ENOMEM; | |
542 | } | |
543 | ||
7a3de2b3 JG |
544 | static void nvm_unregister_map(struct nvm_dev *dev) |
545 | { | |
546 | struct nvm_dev_map *rmap = dev->rmap; | |
547 | int i; | |
548 | ||
549 | for (i = 0; i < dev->geo.nr_chnls; i++) | |
550 | kfree(rmap->chnls[i].lun_offs); | |
551 | ||
552 | kfree(rmap->chnls); | |
553 | kfree(rmap); | |
554 | } | |
555 | ||
61a561d8 | 556 | static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
557 | { |
558 | struct nvm_dev_map *dev_map = tgt_dev->map; | |
559 | struct nvm_ch_map *ch_map = &dev_map->chnls[p->g.ch]; | |
560 | int lun_off = ch_map->lun_offs[p->g.lun]; | |
ade69e24 MB |
561 | |
562 | p->g.ch += ch_map->ch_off; | |
563 | p->g.lun += lun_off; | |
ade69e24 MB |
564 | } |
565 | ||
61a561d8 | 566 | static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
567 | { |
568 | struct nvm_dev *dev = tgt_dev->parent; | |
569 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
570 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch]; | |
571 | int lun_roff = ch_rmap->lun_offs[p->g.lun]; | |
572 | ||
573 | p->g.ch -= ch_rmap->ch_off; | |
574 | p->g.lun -= lun_roff; | |
ade69e24 MB |
575 | } |
576 | ||
dab8ee9e MB |
577 | static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, |
578 | struct ppa_addr *ppa_list, int nr_ppas) | |
ade69e24 MB |
579 | { |
580 | int i; | |
ade69e24 | 581 | |
dab8ee9e MB |
582 | for (i = 0; i < nr_ppas; i++) { |
583 | nvm_map_to_dev(tgt_dev, &ppa_list[i]); | |
584 | ppa_list[i] = generic_to_dev_addr(tgt_dev, ppa_list[i]); | |
ade69e24 | 585 | } |
dab8ee9e | 586 | } |
ade69e24 | 587 | |
dab8ee9e MB |
588 | static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, |
589 | struct ppa_addr *ppa_list, int nr_ppas) | |
590 | { | |
591 | int i; | |
592 | ||
593 | for (i = 0; i < nr_ppas; i++) { | |
594 | ppa_list[i] = dev_to_generic_addr(tgt_dev, ppa_list[i]); | |
595 | nvm_map_to_tgt(tgt_dev, &ppa_list[i]); | |
ade69e24 | 596 | } |
ade69e24 MB |
597 | } |
598 | ||
dab8ee9e | 599 | static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
ade69e24 | 600 | { |
dab8ee9e MB |
601 | if (rqd->nr_ppas == 1) { |
602 | nvm_ppa_tgt_to_dev(tgt_dev, &rqd->ppa_addr, 1); | |
603 | return; | |
604 | } | |
ade69e24 | 605 | |
dab8ee9e MB |
606 | nvm_ppa_tgt_to_dev(tgt_dev, rqd->ppa_list, rqd->nr_ppas); |
607 | } | |
608 | ||
609 | static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) | |
610 | { | |
611 | if (rqd->nr_ppas == 1) { | |
612 | nvm_ppa_dev_to_tgt(tgt_dev, &rqd->ppa_addr, 1); | |
613 | return; | |
614 | } | |
ade69e24 | 615 | |
dab8ee9e | 616 | nvm_ppa_dev_to_tgt(tgt_dev, rqd->ppa_list, rqd->nr_ppas); |
ade69e24 MB |
617 | } |
618 | ||
6063fe39 | 619 | int nvm_register_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
620 | { |
621 | int ret = 0; | |
622 | ||
5cd90785 | 623 | down_write(&nvm_tgtt_lock); |
e29c80e6 | 624 | if (__nvm_find_target_type(tt->name)) |
cd9e9808 MB |
625 | ret = -EEXIST; |
626 | else | |
6063fe39 | 627 | list_add(&tt->list, &nvm_tgt_types); |
5cd90785 | 628 | up_write(&nvm_tgtt_lock); |
cd9e9808 MB |
629 | |
630 | return ret; | |
631 | } | |
6063fe39 | 632 | EXPORT_SYMBOL(nvm_register_tgt_type); |
cd9e9808 | 633 | |
6063fe39 | 634 | void nvm_unregister_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
635 | { |
636 | if (!tt) | |
637 | return; | |
638 | ||
88d31ea2 | 639 | down_write(&nvm_tgtt_lock); |
cd9e9808 | 640 | list_del(&tt->list); |
88d31ea2 | 641 | up_write(&nvm_tgtt_lock); |
cd9e9808 | 642 | } |
6063fe39 | 643 | EXPORT_SYMBOL(nvm_unregister_tgt_type); |
cd9e9808 MB |
644 | |
645 | void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, | |
646 | dma_addr_t *dma_handler) | |
647 | { | |
75b85649 | 648 | return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags, |
cd9e9808 MB |
649 | dma_handler); |
650 | } | |
651 | EXPORT_SYMBOL(nvm_dev_dma_alloc); | |
652 | ||
da2d7cb8 | 653 | void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler) |
cd9e9808 | 654 | { |
75b85649 | 655 | dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler); |
cd9e9808 MB |
656 | } |
657 | EXPORT_SYMBOL(nvm_dev_dma_free); | |
658 | ||
cd9e9808 MB |
659 | static struct nvm_dev *nvm_find_nvm_dev(const char *name) |
660 | { | |
661 | struct nvm_dev *dev; | |
662 | ||
663 | list_for_each_entry(dev, &nvm_devices, devices) | |
664 | if (!strcmp(name, dev->name)) | |
665 | return dev; | |
666 | ||
667 | return NULL; | |
668 | } | |
669 | ||
eb6f168f RP |
670 | static int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, |
671 | const struct ppa_addr *ppas, int nr_ppas) | |
672 | { | |
673 | struct nvm_dev *dev = tgt_dev->parent; | |
674 | struct nvm_geo *geo = &tgt_dev->geo; | |
675 | int i, plane_cnt, pl_idx; | |
676 | struct ppa_addr ppa; | |
677 | ||
678 | if (geo->plane_mode == NVM_PLANE_SINGLE && nr_ppas == 1) { | |
679 | rqd->nr_ppas = nr_ppas; | |
680 | rqd->ppa_addr = ppas[0]; | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | rqd->nr_ppas = nr_ppas; | |
686 | rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); | |
687 | if (!rqd->ppa_list) { | |
688 | pr_err("nvm: failed to allocate dma memory\n"); | |
689 | return -ENOMEM; | |
690 | } | |
691 | ||
692 | plane_cnt = geo->plane_mode; | |
693 | rqd->nr_ppas *= plane_cnt; | |
694 | ||
695 | for (i = 0; i < nr_ppas; i++) { | |
696 | for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { | |
697 | ppa = ppas[i]; | |
698 | ppa.g.pl = pl_idx; | |
699 | rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa; | |
700 | } | |
701 | } | |
702 | ||
703 | return 0; | |
704 | } | |
705 | ||
706 | static void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, | |
707 | struct nvm_rq *rqd) | |
708 | { | |
709 | if (!rqd->ppa_list) | |
710 | return; | |
711 | ||
712 | nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list); | |
713 | } | |
714 | ||
715 | ||
333ba053 JG |
716 | int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, |
717 | int nr_ppas, int type) | |
718 | { | |
719 | struct nvm_dev *dev = tgt_dev->parent; | |
720 | struct nvm_rq rqd; | |
721 | int ret; | |
722 | ||
89a09c56 | 723 | if (nr_ppas > NVM_MAX_VLBA) { |
333ba053 JG |
724 | pr_err("nvm: unable to update all blocks atomically\n"); |
725 | return -EINVAL; | |
726 | } | |
727 | ||
728 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
729 | ||
ef56b9ce | 730 | nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas); |
dab8ee9e | 731 | nvm_rq_tgt_to_dev(tgt_dev, &rqd); |
333ba053 JG |
732 | |
733 | ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); | |
17912c49 | 734 | nvm_free_rqd_ppalist(tgt_dev, &rqd); |
333ba053 | 735 | if (ret) { |
ade69e24 | 736 | pr_err("nvm: failed bb mark\n"); |
333ba053 JG |
737 | return -EINVAL; |
738 | } | |
739 | ||
740 | return 0; | |
741 | } | |
742 | EXPORT_SYMBOL(nvm_set_tgt_bb_tbl); | |
743 | ||
8e53624d | 744 | int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
cd9e9808 | 745 | { |
8e53624d | 746 | struct nvm_dev *dev = tgt_dev->parent; |
3e505afb | 747 | int ret; |
8e53624d | 748 | |
ade69e24 MB |
749 | if (!dev->ops->submit_io) |
750 | return -ENODEV; | |
751 | ||
dab8ee9e | 752 | nvm_rq_tgt_to_dev(tgt_dev, rqd); |
ade69e24 MB |
753 | |
754 | rqd->dev = tgt_dev; | |
3e505afb JG |
755 | |
756 | /* In case of error, fail with right address format */ | |
757 | ret = dev->ops->submit_io(dev, rqd); | |
758 | if (ret) | |
759 | nvm_rq_dev_to_tgt(tgt_dev, rqd); | |
760 | return ret; | |
cd9e9808 MB |
761 | } |
762 | EXPORT_SYMBOL(nvm_submit_io); | |
763 | ||
1a94b2d4 | 764 | int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
cd9e9808 | 765 | { |
1a94b2d4 JG |
766 | struct nvm_dev *dev = tgt_dev->parent; |
767 | int ret; | |
768 | ||
769 | if (!dev->ops->submit_io_sync) | |
770 | return -ENODEV; | |
771 | ||
772 | nvm_rq_tgt_to_dev(tgt_dev, rqd); | |
10995c3d | 773 | |
1a94b2d4 JG |
774 | rqd->dev = tgt_dev; |
775 | ||
776 | /* In case of error, fail with right address format */ | |
777 | ret = dev->ops->submit_io_sync(dev, rqd); | |
778 | nvm_rq_dev_to_tgt(tgt_dev, rqd); | |
779 | ||
780 | return ret; | |
17912c49 | 781 | } |
1a94b2d4 | 782 | EXPORT_SYMBOL(nvm_submit_io_sync); |
10995c3d | 783 | |
06894efe | 784 | void nvm_end_io(struct nvm_rq *rqd) |
91276162 | 785 | { |
ade69e24 | 786 | struct nvm_tgt_dev *tgt_dev = rqd->dev; |
ade69e24 MB |
787 | |
788 | /* Convert address space */ | |
789 | if (tgt_dev) | |
dab8ee9e | 790 | nvm_rq_dev_to_tgt(tgt_dev, rqd); |
ade69e24 | 791 | |
06894efe MB |
792 | if (rqd->end_io) |
793 | rqd->end_io(rqd); | |
91276162 MB |
794 | } |
795 | EXPORT_SYMBOL(nvm_end_io); | |
796 | ||
22e8c976 MB |
797 | /* |
798 | * folds a bad block list from its plane representation to its virtual | |
799 | * block representation. The fold is done in place and reduced size is | |
800 | * returned. | |
801 | * | |
802 | * If any of the planes status are bad or grown bad block, the virtual block | |
803 | * is marked bad. If not bad, the first plane state acts as the block state. | |
804 | */ | |
805 | int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) | |
806 | { | |
8e79b5cb | 807 | struct nvm_geo *geo = &dev->geo; |
22e8c976 MB |
808 | int blk, offset, pl, blktype; |
809 | ||
fae7fae4 | 810 | if (nr_blks != geo->nr_chks * geo->plane_mode) |
22e8c976 MB |
811 | return -EINVAL; |
812 | ||
fae7fae4 | 813 | for (blk = 0; blk < geo->nr_chks; blk++) { |
8e79b5cb | 814 | offset = blk * geo->plane_mode; |
22e8c976 MB |
815 | blktype = blks[offset]; |
816 | ||
817 | /* Bad blocks on any planes take precedence over other types */ | |
8e79b5cb | 818 | for (pl = 0; pl < geo->plane_mode; pl++) { |
22e8c976 MB |
819 | if (blks[offset + pl] & |
820 | (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { | |
821 | blktype = blks[offset + pl]; | |
822 | break; | |
823 | } | |
824 | } | |
825 | ||
826 | blks[blk] = blktype; | |
827 | } | |
828 | ||
fae7fae4 | 829 | return geo->nr_chks; |
22e8c976 MB |
830 | } |
831 | EXPORT_SYMBOL(nvm_bb_tbl_fold); | |
832 | ||
333ba053 JG |
833 | int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa, |
834 | u8 *blks) | |
835 | { | |
8f4fe008 MB |
836 | struct nvm_dev *dev = tgt_dev->parent; |
837 | ||
dab8ee9e | 838 | nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1); |
333ba053 | 839 | |
8f4fe008 | 840 | return dev->ops->get_bb_tbl(dev, ppa, blks); |
333ba053 JG |
841 | } |
842 | EXPORT_SYMBOL(nvm_get_tgt_bb_tbl); | |
843 | ||
cd9e9808 MB |
844 | static int nvm_core_init(struct nvm_dev *dev) |
845 | { | |
846 | struct nvm_id *id = &dev->identity; | |
8e79b5cb | 847 | struct nvm_geo *geo = &dev->geo; |
7f7c5d03 | 848 | int ret; |
cd9e9808 | 849 | |
fae7fae4 MB |
850 | memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); |
851 | ||
c6ac3f35 | 852 | if (id->mtype != 0) { |
fae7fae4 MB |
853 | pr_err("nvm: memory type not supported\n"); |
854 | return -EINVAL; | |
855 | } | |
856 | ||
8e79b5cb | 857 | /* Whole device values */ |
c6ac3f35 MB |
858 | geo->nr_chnls = id->num_ch; |
859 | geo->nr_luns = id->num_lun; | |
fae7fae4 MB |
860 | |
861 | /* Generic device geometry values */ | |
c6ac3f35 MB |
862 | geo->ws_min = id->ws_min; |
863 | geo->ws_opt = id->ws_opt; | |
864 | geo->ws_seq = id->ws_seq; | |
865 | geo->ws_per_chk = id->ws_per_chk; | |
866 | geo->nr_chks = id->num_chk; | |
c6ac3f35 | 867 | geo->mccap = id->mccap; |
cd9e9808 | 868 | |
c6ac3f35 | 869 | geo->sec_per_chk = id->clba; |
fae7fae4 MB |
870 | geo->sec_per_lun = geo->sec_per_chk * geo->nr_chks; |
871 | geo->all_luns = geo->nr_luns * geo->nr_chnls; | |
7f7c5d03 | 872 | |
fae7fae4 MB |
873 | /* 1.2 spec device geometry values */ |
874 | geo->plane_mode = 1 << geo->ws_seq; | |
875 | geo->nr_planes = geo->ws_opt / geo->ws_min; | |
876 | geo->sec_per_pg = geo->ws_min; | |
8e79b5cb | 877 | geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes; |
cd9e9808 | 878 | |
fae7fae4 MB |
879 | dev->total_secs = geo->all_luns * geo->sec_per_lun; |
880 | dev->lun_map = kcalloc(BITS_TO_LONGS(geo->all_luns), | |
da1e2849 WT |
881 | sizeof(unsigned long), GFP_KERNEL); |
882 | if (!dev->lun_map) | |
883 | return -ENOMEM; | |
7f7c5d03 | 884 | |
ade69e24 MB |
885 | INIT_LIST_HEAD(&dev->area_list); |
886 | INIT_LIST_HEAD(&dev->targets); | |
e3eb3799 | 887 | mutex_init(&dev->mlock); |
4c9dacb8 | 888 | spin_lock_init(&dev->lock); |
cd9e9808 | 889 | |
ade69e24 MB |
890 | ret = nvm_register_map(dev); |
891 | if (ret) | |
892 | goto err_fmtype; | |
ac81bfa9 | 893 | |
cd9e9808 | 894 | return 0; |
7f7c5d03 MB |
895 | err_fmtype: |
896 | kfree(dev->lun_map); | |
897 | return ret; | |
cd9e9808 MB |
898 | } |
899 | ||
46b160ce | 900 | static void nvm_free(struct nvm_dev *dev) |
cd9e9808 MB |
901 | { |
902 | if (!dev) | |
903 | return; | |
904 | ||
40267efd SL |
905 | if (dev->dma_pool) |
906 | dev->ops->destroy_dma_pool(dev->dma_pool); | |
907 | ||
7a3de2b3 | 908 | nvm_unregister_map(dev); |
7f7c5d03 | 909 | kfree(dev->lun_map); |
40267efd | 910 | kfree(dev); |
cd9e9808 MB |
911 | } |
912 | ||
913 | static int nvm_init(struct nvm_dev *dev) | |
914 | { | |
8e79b5cb | 915 | struct nvm_geo *geo = &dev->geo; |
480fc0db | 916 | int ret = -EINVAL; |
cd9e9808 | 917 | |
16f26c3a | 918 | if (dev->ops->identity(dev, &dev->identity)) { |
cd9e9808 | 919 | pr_err("nvm: device could not be identified\n"); |
cd9e9808 MB |
920 | goto err; |
921 | } | |
922 | ||
62771fe0 MB |
923 | if (dev->identity.ver_id != 1 && dev->identity.ver_id != 2) { |
924 | pr_err("nvm: device ver_id %d not supported by kernel.\n", | |
925 | dev->identity.ver_id); | |
cd9e9808 MB |
926 | goto err; |
927 | } | |
928 | ||
cd9e9808 MB |
929 | ret = nvm_core_init(dev); |
930 | if (ret) { | |
931 | pr_err("nvm: could not initialize core structures.\n"); | |
932 | goto err; | |
933 | } | |
934 | ||
cd9e9808 | 935 | pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", |
8e79b5cb | 936 | dev->name, geo->sec_per_pg, geo->nr_planes, |
fae7fae4 MB |
937 | geo->ws_per_chk, geo->nr_chks, |
938 | geo->all_luns, geo->nr_chnls); | |
cd9e9808 MB |
939 | return 0; |
940 | err: | |
cd9e9808 MB |
941 | pr_err("nvm: failed to initialize nvm\n"); |
942 | return ret; | |
943 | } | |
944 | ||
b0b4e09c | 945 | struct nvm_dev *nvm_alloc_dev(int node) |
cd9e9808 | 946 | { |
b0b4e09c | 947 | return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node); |
cd9e9808 | 948 | } |
b0b4e09c | 949 | EXPORT_SYMBOL(nvm_alloc_dev); |
cd9e9808 | 950 | |
b0b4e09c | 951 | int nvm_register(struct nvm_dev *dev) |
cd9e9808 | 952 | { |
cd9e9808 MB |
953 | int ret; |
954 | ||
ade69e24 MB |
955 | if (!dev->q || !dev->ops) |
956 | return -EINVAL; | |
cd9e9808 | 957 | |
89a09c56 MB |
958 | dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist"); |
959 | if (!dev->dma_pool) { | |
960 | pr_err("nvm: could not create dma pool\n"); | |
961 | return -ENOMEM; | |
cd9e9808 MB |
962 | } |
963 | ||
ade69e24 MB |
964 | ret = nvm_init(dev); |
965 | if (ret) | |
966 | goto err_init; | |
b7692076 | 967 | |
762796bc | 968 | /* register device with a supported media manager */ |
edad2e66 MB |
969 | down_write(&nvm_lock); |
970 | list_add(&dev->devices, &nvm_devices); | |
971 | up_write(&nvm_lock); | |
972 | ||
cd9e9808 MB |
973 | return 0; |
974 | err_init: | |
ade69e24 | 975 | dev->ops->destroy_dma_pool(dev->dma_pool); |
cd9e9808 MB |
976 | return ret; |
977 | } | |
978 | EXPORT_SYMBOL(nvm_register); | |
979 | ||
b0b4e09c | 980 | void nvm_unregister(struct nvm_dev *dev) |
cd9e9808 | 981 | { |
ade69e24 MB |
982 | struct nvm_target *t, *tmp; |
983 | ||
984 | mutex_lock(&dev->mlock); | |
985 | list_for_each_entry_safe(t, tmp, &dev->targets, list) { | |
986 | if (t->dev->parent != dev) | |
987 | continue; | |
988 | __nvm_remove_target(t); | |
989 | } | |
990 | mutex_unlock(&dev->mlock); | |
991 | ||
d0a712ce | 992 | down_write(&nvm_lock); |
cd9e9808 MB |
993 | list_del(&dev->devices); |
994 | up_write(&nvm_lock); | |
c1480ad5 | 995 | |
3dc87dd0 | 996 | nvm_free(dev); |
cd9e9808 MB |
997 | } |
998 | EXPORT_SYMBOL(nvm_unregister); | |
999 | ||
cd9e9808 MB |
1000 | static int __nvm_configure_create(struct nvm_ioctl_create *create) |
1001 | { | |
1002 | struct nvm_dev *dev; | |
cd9e9808 | 1003 | |
d0a712ce | 1004 | down_write(&nvm_lock); |
cd9e9808 | 1005 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 1006 | up_write(&nvm_lock); |
b76eb20b | 1007 | |
cd9e9808 MB |
1008 | if (!dev) { |
1009 | pr_err("nvm: device not found\n"); | |
1010 | return -EINVAL; | |
1011 | } | |
1012 | ||
ade69e24 | 1013 | return nvm_create_tgt(dev, create); |
cd9e9808 MB |
1014 | } |
1015 | ||
cd9e9808 MB |
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 | ||
88d31ea2 | 1033 | down_write(&nvm_tgtt_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; | |
88d31ea2 | 1046 | up_write(&nvm_tgtt_lock); |
cd9e9808 | 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 | ||
6eb08245 | 1074 | strlcpy(info->devname, dev->name, sizeof(info->devname)); |
cd9e9808 | 1075 | |
ade69e24 MB |
1076 | /* kept for compatibility */ |
1077 | info->bmversion[0] = 1; | |
1078 | info->bmversion[1] = 0; | |
1079 | info->bmversion[2] = 0; | |
6eb08245 | 1080 | strlcpy(info->bmname, "gennvm", sizeof(info->bmname)); |
cd9e9808 | 1081 | i++; |
ade69e24 | 1082 | |
cd9e9808 MB |
1083 | if (i > 31) { |
1084 | pr_err("nvm: max 31 devices can be reported.\n"); | |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | up_write(&nvm_lock); | |
1089 | ||
1090 | devices->nr_devices = i; | |
1091 | ||
76e25081 SM |
1092 | if (copy_to_user(arg, devices, |
1093 | sizeof(struct nvm_ioctl_get_devices))) { | |
1094 | kfree(devices); | |
cd9e9808 | 1095 | return -EFAULT; |
76e25081 | 1096 | } |
cd9e9808 MB |
1097 | |
1098 | kfree(devices); | |
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
1103 | { | |
1104 | struct nvm_ioctl_create create; | |
1105 | ||
1106 | if (!capable(CAP_SYS_ADMIN)) | |
1107 | return -EPERM; | |
1108 | ||
1109 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) | |
1110 | return -EFAULT; | |
1111 | ||
e5392739 JG |
1112 | if (create.conf.type == NVM_CONFIG_TYPE_EXTENDED && |
1113 | create.conf.e.rsv != 0) { | |
1114 | pr_err("nvm: reserved config field in use\n"); | |
1115 | return -EINVAL; | |
1116 | } | |
1117 | ||
cd9e9808 MB |
1118 | create.dev[DISK_NAME_LEN - 1] = '\0'; |
1119 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
1120 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1121 | ||
1122 | if (create.flags != 0) { | |
4af3f75d JG |
1123 | __u32 flags = create.flags; |
1124 | ||
1125 | /* Check for valid flags */ | |
1126 | if (flags & NVM_TARGET_FACTORY) | |
1127 | flags &= ~NVM_TARGET_FACTORY; | |
1128 | ||
1129 | if (flags) { | |
1130 | pr_err("nvm: flag not supported\n"); | |
1131 | return -EINVAL; | |
1132 | } | |
cd9e9808 MB |
1133 | } |
1134 | ||
1135 | return __nvm_configure_create(&create); | |
1136 | } | |
1137 | ||
1138 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
1139 | { | |
1140 | struct nvm_ioctl_remove remove; | |
b76eb20b MB |
1141 | struct nvm_dev *dev; |
1142 | int ret = 0; | |
cd9e9808 MB |
1143 | |
1144 | if (!capable(CAP_SYS_ADMIN)) | |
1145 | return -EPERM; | |
1146 | ||
1147 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) | |
1148 | return -EFAULT; | |
1149 | ||
1150 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1151 | ||
1152 | if (remove.flags != 0) { | |
1153 | pr_err("nvm: no flags supported\n"); | |
1154 | return -EINVAL; | |
1155 | } | |
1156 | ||
b76eb20b | 1157 | list_for_each_entry(dev, &nvm_devices, devices) { |
ade69e24 | 1158 | ret = nvm_remove_tgt(dev, &remove); |
b76eb20b MB |
1159 | if (!ret) |
1160 | break; | |
1161 | } | |
1162 | ||
1163 | return ret; | |
cd9e9808 MB |
1164 | } |
1165 | ||
ade69e24 | 1166 | /* kept for compatibility reasons */ |
55696154 MB |
1167 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) |
1168 | { | |
1169 | struct nvm_ioctl_dev_init init; | |
1170 | ||
1171 | if (!capable(CAP_SYS_ADMIN)) | |
1172 | return -EPERM; | |
1173 | ||
1174 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) | |
1175 | return -EFAULT; | |
1176 | ||
1177 | if (init.flags != 0) { | |
1178 | pr_err("nvm: no flags supported\n"); | |
1179 | return -EINVAL; | |
1180 | } | |
1181 | ||
ade69e24 | 1182 | return 0; |
55696154 MB |
1183 | } |
1184 | ||
ade69e24 | 1185 | /* Kept for compatibility reasons */ |
8b4970c4 MB |
1186 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
1187 | { | |
1188 | struct nvm_ioctl_dev_factory fact; | |
8b4970c4 MB |
1189 | |
1190 | if (!capable(CAP_SYS_ADMIN)) | |
1191 | return -EPERM; | |
1192 | ||
1193 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) | |
1194 | return -EFAULT; | |
1195 | ||
1196 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1197 | ||
1198 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1199 | return -EINVAL; | |
1200 | ||
bf643185 | 1201 | return 0; |
8b4970c4 MB |
1202 | } |
1203 | ||
cd9e9808 MB |
1204 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1205 | { | |
1206 | void __user *argp = (void __user *)arg; | |
1207 | ||
1208 | switch (cmd) { | |
1209 | case NVM_INFO: | |
1210 | return nvm_ioctl_info(file, argp); | |
1211 | case NVM_GET_DEVICES: | |
1212 | return nvm_ioctl_get_devices(file, argp); | |
1213 | case NVM_DEV_CREATE: | |
1214 | return nvm_ioctl_dev_create(file, argp); | |
1215 | case NVM_DEV_REMOVE: | |
1216 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1217 | case NVM_DEV_INIT: |
1218 | return nvm_ioctl_dev_init(file, argp); | |
8b4970c4 MB |
1219 | case NVM_DEV_FACTORY: |
1220 | return nvm_ioctl_dev_factory(file, argp); | |
cd9e9808 MB |
1221 | } |
1222 | return 0; | |
1223 | } | |
1224 | ||
1225 | static const struct file_operations _ctl_fops = { | |
1226 | .open = nonseekable_open, | |
1227 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1228 | .owner = THIS_MODULE, | |
1229 | .llseek = noop_llseek, | |
1230 | }; | |
1231 | ||
1232 | static struct miscdevice _nvm_misc = { | |
1233 | .minor = MISC_DYNAMIC_MINOR, | |
1234 | .name = "lightnvm", | |
1235 | .nodename = "lightnvm/control", | |
1236 | .fops = &_ctl_fops, | |
1237 | }; | |
389b2a1c | 1238 | builtin_misc_device(_nvm_misc); |