]>
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> | |
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_devices); |
33 | static DECLARE_RWSEM(nvm_lock); | |
34 | ||
ade69e24 MB |
35 | /* Map between virtual and physical channel and lun */ |
36 | struct nvm_ch_map { | |
37 | int ch_off; | |
38 | int nr_luns; | |
39 | int *lun_offs; | |
40 | }; | |
41 | ||
42 | struct nvm_dev_map { | |
43 | struct nvm_ch_map *chnls; | |
44 | int nr_chnls; | |
45 | }; | |
46 | ||
47 | struct nvm_area { | |
48 | struct list_head list; | |
49 | sector_t begin; | |
50 | sector_t end; /* end is excluded */ | |
51 | }; | |
52 | ||
ade69e24 MB |
53 | static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name) |
54 | { | |
55 | struct nvm_target *tgt; | |
56 | ||
57 | list_for_each_entry(tgt, &dev->targets, list) | |
58 | if (!strcmp(name, tgt->disk->disk_name)) | |
59 | return tgt; | |
60 | ||
61 | return NULL; | |
62 | } | |
63 | ||
64 | static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end) | |
65 | { | |
66 | int i; | |
67 | ||
68 | for (i = lun_begin; i <= lun_end; i++) { | |
69 | if (test_and_set_bit(i, dev->lun_map)) { | |
70 | pr_err("nvm: lun %d already allocated\n", i); | |
71 | goto err; | |
72 | } | |
73 | } | |
74 | ||
75 | return 0; | |
76 | err: | |
77 | while (--i > lun_begin) | |
78 | clear_bit(i, dev->lun_map); | |
79 | ||
80 | return -EBUSY; | |
81 | } | |
82 | ||
83 | static void nvm_release_luns_err(struct nvm_dev *dev, int lun_begin, | |
84 | int lun_end) | |
85 | { | |
86 | int i; | |
87 | ||
88 | for (i = lun_begin; i <= lun_end; i++) | |
89 | WARN_ON(!test_and_clear_bit(i, dev->lun_map)); | |
90 | } | |
91 | ||
92 | static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev) | |
93 | { | |
94 | struct nvm_dev *dev = tgt_dev->parent; | |
95 | struct nvm_dev_map *dev_map = tgt_dev->map; | |
96 | int i, j; | |
97 | ||
98 | for (i = 0; i < dev_map->nr_chnls; i++) { | |
99 | struct nvm_ch_map *ch_map = &dev_map->chnls[i]; | |
100 | int *lun_offs = ch_map->lun_offs; | |
101 | int ch = i + ch_map->ch_off; | |
102 | ||
103 | for (j = 0; j < ch_map->nr_luns; j++) { | |
104 | int lun = j + lun_offs[j]; | |
105 | int lunid = (ch * dev->geo.luns_per_chnl) + lun; | |
106 | ||
107 | WARN_ON(!test_and_clear_bit(lunid, dev->lun_map)); | |
108 | } | |
109 | ||
110 | kfree(ch_map->lun_offs); | |
111 | } | |
112 | ||
113 | kfree(dev_map->chnls); | |
114 | kfree(dev_map); | |
115 | ||
116 | kfree(tgt_dev->luns); | |
117 | kfree(tgt_dev); | |
118 | } | |
119 | ||
120 | static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev, | |
121 | int lun_begin, int lun_end) | |
122 | { | |
123 | struct nvm_tgt_dev *tgt_dev = NULL; | |
124 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
125 | struct nvm_dev_map *dev_map; | |
126 | struct ppa_addr *luns; | |
127 | int nr_luns = lun_end - lun_begin + 1; | |
128 | int luns_left = nr_luns; | |
129 | int nr_chnls = nr_luns / dev->geo.luns_per_chnl; | |
130 | int nr_chnls_mod = nr_luns % dev->geo.luns_per_chnl; | |
131 | int bch = lun_begin / dev->geo.luns_per_chnl; | |
132 | int blun = lun_begin % dev->geo.luns_per_chnl; | |
133 | int lunid = 0; | |
134 | int lun_balanced = 1; | |
135 | int prev_nr_luns; | |
136 | int i, j; | |
137 | ||
138 | nr_chnls = nr_luns / dev->geo.luns_per_chnl; | |
139 | nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1; | |
140 | ||
141 | dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
142 | if (!dev_map) | |
143 | goto err_dev; | |
144 | ||
145 | dev_map->chnls = kcalloc(nr_chnls, sizeof(struct nvm_ch_map), | |
146 | GFP_KERNEL); | |
147 | if (!dev_map->chnls) | |
148 | goto err_chnls; | |
149 | ||
150 | luns = kcalloc(nr_luns, sizeof(struct ppa_addr), GFP_KERNEL); | |
151 | if (!luns) | |
152 | goto err_luns; | |
153 | ||
154 | prev_nr_luns = (luns_left > dev->geo.luns_per_chnl) ? | |
155 | dev->geo.luns_per_chnl : luns_left; | |
156 | for (i = 0; i < nr_chnls; i++) { | |
157 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch]; | |
158 | int *lun_roffs = ch_rmap->lun_offs; | |
159 | struct nvm_ch_map *ch_map = &dev_map->chnls[i]; | |
160 | int *lun_offs; | |
161 | int luns_in_chnl = (luns_left > dev->geo.luns_per_chnl) ? | |
162 | dev->geo.luns_per_chnl : luns_left; | |
163 | ||
164 | if (lun_balanced && prev_nr_luns != luns_in_chnl) | |
165 | lun_balanced = 0; | |
166 | ||
167 | ch_map->ch_off = ch_rmap->ch_off = bch; | |
168 | ch_map->nr_luns = luns_in_chnl; | |
169 | ||
170 | lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
171 | if (!lun_offs) | |
172 | goto err_ch; | |
173 | ||
174 | for (j = 0; j < luns_in_chnl; j++) { | |
175 | luns[lunid].ppa = 0; | |
176 | luns[lunid].g.ch = i; | |
177 | luns[lunid++].g.lun = j; | |
178 | ||
179 | lun_offs[j] = blun; | |
180 | lun_roffs[j + blun] = blun; | |
181 | } | |
182 | ||
183 | ch_map->lun_offs = lun_offs; | |
184 | ||
185 | /* when starting a new channel, lun offset is reset */ | |
186 | blun = 0; | |
187 | luns_left -= luns_in_chnl; | |
188 | } | |
189 | ||
190 | dev_map->nr_chnls = nr_chnls; | |
191 | ||
192 | tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL); | |
193 | if (!tgt_dev) | |
194 | goto err_ch; | |
195 | ||
196 | memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo)); | |
197 | /* Target device only owns a portion of the physical device */ | |
198 | tgt_dev->geo.nr_chnls = nr_chnls; | |
199 | tgt_dev->geo.nr_luns = nr_luns; | |
200 | tgt_dev->geo.luns_per_chnl = (lun_balanced) ? prev_nr_luns : -1; | |
201 | tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun; | |
202 | tgt_dev->q = dev->q; | |
203 | tgt_dev->map = dev_map; | |
204 | tgt_dev->luns = luns; | |
205 | memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id)); | |
206 | ||
207 | tgt_dev->parent = dev; | |
208 | ||
209 | return tgt_dev; | |
210 | err_ch: | |
211 | while (--i > 0) | |
212 | kfree(dev_map->chnls[i].lun_offs); | |
213 | kfree(luns); | |
214 | err_luns: | |
215 | kfree(dev_map->chnls); | |
216 | err_chnls: | |
217 | kfree(dev_map); | |
218 | err_dev: | |
219 | return tgt_dev; | |
220 | } | |
221 | ||
222 | static const struct block_device_operations nvm_fops = { | |
223 | .owner = THIS_MODULE, | |
224 | }; | |
225 | ||
226 | static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) | |
227 | { | |
228 | struct nvm_ioctl_create_simple *s = &create->conf.s; | |
229 | struct request_queue *tqueue; | |
230 | struct gendisk *tdisk; | |
231 | struct nvm_tgt_type *tt; | |
232 | struct nvm_target *t; | |
233 | struct nvm_tgt_dev *tgt_dev; | |
234 | void *targetdata; | |
235 | ||
236 | tt = nvm_find_target_type(create->tgttype, 1); | |
237 | if (!tt) { | |
238 | pr_err("nvm: target type %s not found\n", create->tgttype); | |
239 | return -EINVAL; | |
240 | } | |
241 | ||
242 | mutex_lock(&dev->mlock); | |
243 | t = nvm_find_target(dev, create->tgtname); | |
244 | if (t) { | |
245 | pr_err("nvm: target name already exists.\n"); | |
246 | mutex_unlock(&dev->mlock); | |
247 | return -EINVAL; | |
248 | } | |
249 | mutex_unlock(&dev->mlock); | |
250 | ||
251 | if (nvm_reserve_luns(dev, s->lun_begin, s->lun_end)) | |
252 | return -ENOMEM; | |
253 | ||
254 | t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); | |
255 | if (!t) | |
256 | goto err_reserve; | |
257 | ||
258 | tgt_dev = nvm_create_tgt_dev(dev, s->lun_begin, s->lun_end); | |
259 | if (!tgt_dev) { | |
260 | pr_err("nvm: could not create target device\n"); | |
261 | goto err_t; | |
262 | } | |
263 | ||
264 | tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node); | |
265 | if (!tqueue) | |
266 | goto err_dev; | |
267 | blk_queue_make_request(tqueue, tt->make_rq); | |
268 | ||
269 | tdisk = alloc_disk(0); | |
270 | if (!tdisk) | |
271 | goto err_queue; | |
272 | ||
273 | sprintf(tdisk->disk_name, "%s", create->tgtname); | |
274 | tdisk->flags = GENHD_FL_EXT_DEVT; | |
275 | tdisk->major = 0; | |
276 | tdisk->first_minor = 0; | |
277 | tdisk->fops = &nvm_fops; | |
278 | tdisk->queue = tqueue; | |
279 | ||
280 | targetdata = tt->init(tgt_dev, tdisk); | |
281 | if (IS_ERR(targetdata)) | |
282 | goto err_init; | |
283 | ||
284 | tdisk->private_data = targetdata; | |
285 | tqueue->queuedata = targetdata; | |
286 | ||
287 | blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect); | |
288 | ||
289 | set_capacity(tdisk, tt->capacity(targetdata)); | |
290 | add_disk(tdisk); | |
291 | ||
9a69b0ed JG |
292 | if (tt->sysfs_init && tt->sysfs_init(tdisk)) |
293 | goto err_sysfs; | |
294 | ||
ade69e24 MB |
295 | t->type = tt; |
296 | t->disk = tdisk; | |
297 | t->dev = tgt_dev; | |
298 | ||
299 | mutex_lock(&dev->mlock); | |
300 | list_add_tail(&t->list, &dev->targets); | |
301 | mutex_unlock(&dev->mlock); | |
302 | ||
303 | return 0; | |
9a69b0ed JG |
304 | err_sysfs: |
305 | if (tt->exit) | |
306 | tt->exit(targetdata); | |
ade69e24 MB |
307 | err_init: |
308 | put_disk(tdisk); | |
309 | err_queue: | |
310 | blk_cleanup_queue(tqueue); | |
311 | err_dev: | |
deccf5a5 | 312 | nvm_remove_tgt_dev(tgt_dev); |
ade69e24 MB |
313 | err_t: |
314 | kfree(t); | |
315 | err_reserve: | |
316 | nvm_release_luns_err(dev, s->lun_begin, s->lun_end); | |
317 | return -ENOMEM; | |
318 | } | |
319 | ||
320 | static void __nvm_remove_target(struct nvm_target *t) | |
321 | { | |
322 | struct nvm_tgt_type *tt = t->type; | |
323 | struct gendisk *tdisk = t->disk; | |
324 | struct request_queue *q = tdisk->queue; | |
325 | ||
326 | del_gendisk(tdisk); | |
327 | blk_cleanup_queue(q); | |
328 | ||
9a69b0ed JG |
329 | if (tt->sysfs_exit) |
330 | tt->sysfs_exit(tdisk); | |
331 | ||
ade69e24 MB |
332 | if (tt->exit) |
333 | tt->exit(tdisk->private_data); | |
334 | ||
335 | nvm_remove_tgt_dev(t->dev); | |
336 | put_disk(tdisk); | |
337 | ||
338 | list_del(&t->list); | |
339 | kfree(t); | |
340 | } | |
341 | ||
342 | /** | |
343 | * nvm_remove_tgt - Removes a target from the media manager | |
344 | * @dev: device | |
345 | * @remove: ioctl structure with target name to remove. | |
346 | * | |
347 | * Returns: | |
348 | * 0: on success | |
349 | * 1: on not found | |
350 | * <0: on error | |
351 | */ | |
352 | static int nvm_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove) | |
353 | { | |
354 | struct nvm_target *t; | |
355 | ||
356 | mutex_lock(&dev->mlock); | |
357 | t = nvm_find_target(dev, remove->tgtname); | |
358 | if (!t) { | |
359 | mutex_unlock(&dev->mlock); | |
360 | return 1; | |
361 | } | |
362 | __nvm_remove_target(t); | |
363 | mutex_unlock(&dev->mlock); | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | static int nvm_register_map(struct nvm_dev *dev) | |
369 | { | |
370 | struct nvm_dev_map *rmap; | |
371 | int i, j; | |
372 | ||
373 | rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
374 | if (!rmap) | |
375 | goto err_rmap; | |
376 | ||
377 | rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct nvm_ch_map), | |
378 | GFP_KERNEL); | |
379 | if (!rmap->chnls) | |
380 | goto err_chnls; | |
381 | ||
382 | for (i = 0; i < dev->geo.nr_chnls; i++) { | |
383 | struct nvm_ch_map *ch_rmap; | |
384 | int *lun_roffs; | |
385 | int luns_in_chnl = dev->geo.luns_per_chnl; | |
386 | ||
387 | ch_rmap = &rmap->chnls[i]; | |
388 | ||
389 | ch_rmap->ch_off = -1; | |
390 | ch_rmap->nr_luns = luns_in_chnl; | |
391 | ||
392 | lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
393 | if (!lun_roffs) | |
394 | goto err_ch; | |
395 | ||
396 | for (j = 0; j < luns_in_chnl; j++) | |
397 | lun_roffs[j] = -1; | |
398 | ||
399 | ch_rmap->lun_offs = lun_roffs; | |
400 | } | |
401 | ||
402 | dev->rmap = rmap; | |
403 | ||
404 | return 0; | |
405 | err_ch: | |
406 | while (--i >= 0) | |
407 | kfree(rmap->chnls[i].lun_offs); | |
408 | err_chnls: | |
409 | kfree(rmap); | |
410 | err_rmap: | |
411 | return -ENOMEM; | |
412 | } | |
413 | ||
61a561d8 | 414 | static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
415 | { |
416 | struct nvm_dev_map *dev_map = tgt_dev->map; | |
417 | struct nvm_ch_map *ch_map = &dev_map->chnls[p->g.ch]; | |
418 | int lun_off = ch_map->lun_offs[p->g.lun]; | |
ade69e24 MB |
419 | |
420 | p->g.ch += ch_map->ch_off; | |
421 | p->g.lun += lun_off; | |
ade69e24 MB |
422 | } |
423 | ||
61a561d8 | 424 | static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
425 | { |
426 | struct nvm_dev *dev = tgt_dev->parent; | |
427 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
428 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch]; | |
429 | int lun_roff = ch_rmap->lun_offs[p->g.lun]; | |
430 | ||
431 | p->g.ch -= ch_rmap->ch_off; | |
432 | p->g.lun -= lun_roff; | |
ade69e24 MB |
433 | } |
434 | ||
dab8ee9e MB |
435 | static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, |
436 | struct ppa_addr *ppa_list, int nr_ppas) | |
ade69e24 MB |
437 | { |
438 | int i; | |
ade69e24 | 439 | |
dab8ee9e MB |
440 | for (i = 0; i < nr_ppas; i++) { |
441 | nvm_map_to_dev(tgt_dev, &ppa_list[i]); | |
442 | ppa_list[i] = generic_to_dev_addr(tgt_dev, ppa_list[i]); | |
ade69e24 | 443 | } |
dab8ee9e | 444 | } |
ade69e24 | 445 | |
dab8ee9e MB |
446 | static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, |
447 | struct ppa_addr *ppa_list, int nr_ppas) | |
448 | { | |
449 | int i; | |
450 | ||
451 | for (i = 0; i < nr_ppas; i++) { | |
452 | ppa_list[i] = dev_to_generic_addr(tgt_dev, ppa_list[i]); | |
453 | nvm_map_to_tgt(tgt_dev, &ppa_list[i]); | |
ade69e24 | 454 | } |
ade69e24 MB |
455 | } |
456 | ||
dab8ee9e | 457 | static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
ade69e24 | 458 | { |
dab8ee9e MB |
459 | if (rqd->nr_ppas == 1) { |
460 | nvm_ppa_tgt_to_dev(tgt_dev, &rqd->ppa_addr, 1); | |
461 | return; | |
462 | } | |
ade69e24 | 463 | |
dab8ee9e MB |
464 | nvm_ppa_tgt_to_dev(tgt_dev, rqd->ppa_list, rqd->nr_ppas); |
465 | } | |
466 | ||
467 | static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) | |
468 | { | |
469 | if (rqd->nr_ppas == 1) { | |
470 | nvm_ppa_dev_to_tgt(tgt_dev, &rqd->ppa_addr, 1); | |
471 | return; | |
472 | } | |
ade69e24 | 473 | |
dab8ee9e | 474 | nvm_ppa_dev_to_tgt(tgt_dev, rqd->ppa_list, rqd->nr_ppas); |
ade69e24 MB |
475 | } |
476 | ||
477 | void nvm_part_to_tgt(struct nvm_dev *dev, sector_t *entries, | |
478 | int len) | |
479 | { | |
480 | struct nvm_geo *geo = &dev->geo; | |
481 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
482 | u64 i; | |
483 | ||
484 | for (i = 0; i < len; i++) { | |
485 | struct nvm_ch_map *ch_rmap; | |
486 | int *lun_roffs; | |
487 | struct ppa_addr gaddr; | |
488 | u64 pba = le64_to_cpu(entries[i]); | |
489 | int off; | |
490 | u64 diff; | |
491 | ||
492 | if (!pba) | |
493 | continue; | |
494 | ||
495 | gaddr = linear_to_generic_addr(geo, pba); | |
496 | ch_rmap = &dev_rmap->chnls[gaddr.g.ch]; | |
497 | lun_roffs = ch_rmap->lun_offs; | |
498 | ||
499 | off = gaddr.g.ch * geo->luns_per_chnl + gaddr.g.lun; | |
500 | ||
501 | diff = ((ch_rmap->ch_off * geo->luns_per_chnl) + | |
502 | (lun_roffs[gaddr.g.lun])) * geo->sec_per_lun; | |
503 | ||
504 | entries[i] -= cpu_to_le64(diff); | |
505 | } | |
506 | } | |
507 | EXPORT_SYMBOL(nvm_part_to_tgt); | |
508 | ||
b76eb20b | 509 | struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock) |
6f8645cb | 510 | { |
b76eb20b | 511 | struct nvm_tgt_type *tmp, *tt = NULL; |
6f8645cb | 512 | |
b76eb20b | 513 | if (lock) |
5cd90785 | 514 | down_write(&nvm_tgtt_lock); |
6f8645cb | 515 | |
b76eb20b MB |
516 | list_for_each_entry(tmp, &nvm_tgt_types, list) |
517 | if (!strcmp(name, tmp->name)) { | |
518 | tt = tmp; | |
519 | break; | |
520 | } | |
cd9e9808 | 521 | |
b76eb20b | 522 | if (lock) |
5cd90785 | 523 | up_write(&nvm_tgtt_lock); |
b76eb20b | 524 | return tt; |
cd9e9808 | 525 | } |
b76eb20b | 526 | EXPORT_SYMBOL(nvm_find_target_type); |
cd9e9808 | 527 | |
6063fe39 | 528 | int nvm_register_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
529 | { |
530 | int ret = 0; | |
531 | ||
5cd90785 | 532 | down_write(&nvm_tgtt_lock); |
b76eb20b | 533 | if (nvm_find_target_type(tt->name, 0)) |
cd9e9808 MB |
534 | ret = -EEXIST; |
535 | else | |
6063fe39 | 536 | list_add(&tt->list, &nvm_tgt_types); |
5cd90785 | 537 | up_write(&nvm_tgtt_lock); |
cd9e9808 MB |
538 | |
539 | return ret; | |
540 | } | |
6063fe39 | 541 | EXPORT_SYMBOL(nvm_register_tgt_type); |
cd9e9808 | 542 | |
6063fe39 | 543 | void nvm_unregister_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
544 | { |
545 | if (!tt) | |
546 | return; | |
547 | ||
548 | down_write(&nvm_lock); | |
549 | list_del(&tt->list); | |
550 | up_write(&nvm_lock); | |
551 | } | |
6063fe39 | 552 | EXPORT_SYMBOL(nvm_unregister_tgt_type); |
cd9e9808 MB |
553 | |
554 | void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, | |
555 | dma_addr_t *dma_handler) | |
556 | { | |
75b85649 | 557 | return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags, |
cd9e9808 MB |
558 | dma_handler); |
559 | } | |
560 | EXPORT_SYMBOL(nvm_dev_dma_alloc); | |
561 | ||
da2d7cb8 | 562 | void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler) |
cd9e9808 | 563 | { |
75b85649 | 564 | dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler); |
cd9e9808 MB |
565 | } |
566 | EXPORT_SYMBOL(nvm_dev_dma_free); | |
567 | ||
cd9e9808 MB |
568 | static struct nvm_dev *nvm_find_nvm_dev(const char *name) |
569 | { | |
570 | struct nvm_dev *dev; | |
571 | ||
572 | list_for_each_entry(dev, &nvm_devices, devices) | |
573 | if (!strcmp(name, dev->name)) | |
574 | return dev; | |
575 | ||
576 | return NULL; | |
577 | } | |
578 | ||
333ba053 JG |
579 | int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, |
580 | int nr_ppas, int type) | |
581 | { | |
582 | struct nvm_dev *dev = tgt_dev->parent; | |
583 | struct nvm_rq rqd; | |
584 | int ret; | |
585 | ||
586 | if (nr_ppas > dev->ops->max_phys_sect) { | |
587 | pr_err("nvm: unable to update all blocks atomically\n"); | |
588 | return -EINVAL; | |
589 | } | |
590 | ||
591 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
592 | ||
593 | nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); | |
dab8ee9e | 594 | nvm_rq_tgt_to_dev(tgt_dev, &rqd); |
333ba053 JG |
595 | |
596 | ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); | |
597 | nvm_free_rqd_ppalist(dev, &rqd); | |
598 | if (ret) { | |
ade69e24 | 599 | pr_err("nvm: failed bb mark\n"); |
333ba053 JG |
600 | return -EINVAL; |
601 | } | |
602 | ||
603 | return 0; | |
604 | } | |
605 | EXPORT_SYMBOL(nvm_set_tgt_bb_tbl); | |
606 | ||
a279006a JG |
607 | int nvm_max_phys_sects(struct nvm_tgt_dev *tgt_dev) |
608 | { | |
609 | struct nvm_dev *dev = tgt_dev->parent; | |
610 | ||
611 | return dev->ops->max_phys_sect; | |
612 | } | |
613 | EXPORT_SYMBOL(nvm_max_phys_sects); | |
614 | ||
8e53624d | 615 | int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
cd9e9808 | 616 | { |
8e53624d JG |
617 | struct nvm_dev *dev = tgt_dev->parent; |
618 | ||
ade69e24 MB |
619 | if (!dev->ops->submit_io) |
620 | return -ENODEV; | |
621 | ||
dab8ee9e | 622 | nvm_rq_tgt_to_dev(tgt_dev, rqd); |
ade69e24 MB |
623 | |
624 | rqd->dev = tgt_dev; | |
625 | return dev->ops->submit_io(dev, rqd); | |
cd9e9808 MB |
626 | } |
627 | EXPORT_SYMBOL(nvm_submit_io); | |
628 | ||
10995c3d | 629 | int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, int flags) |
cd9e9808 | 630 | { |
10995c3d MB |
631 | struct nvm_dev *dev = tgt_dev->parent; |
632 | struct nvm_rq rqd; | |
633 | int ret; | |
634 | ||
635 | if (!dev->ops->erase_block) | |
636 | return 0; | |
637 | ||
61a561d8 | 638 | nvm_map_to_dev(tgt_dev, ppas); |
10995c3d MB |
639 | |
640 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
8e53624d | 641 | |
10995c3d MB |
642 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, 1, 1); |
643 | if (ret) | |
644 | return ret; | |
645 | ||
dab8ee9e | 646 | nvm_rq_tgt_to_dev(tgt_dev, &rqd); |
10995c3d MB |
647 | |
648 | rqd.flags = flags; | |
649 | ||
650 | ret = dev->ops->erase_block(dev, &rqd); | |
651 | ||
652 | nvm_free_rqd_ppalist(dev, &rqd); | |
653 | ||
654 | return ret; | |
cd9e9808 MB |
655 | } |
656 | EXPORT_SYMBOL(nvm_erase_blk); | |
657 | ||
da2d7cb8 | 658 | int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb, |
959e911b JG |
659 | nvm_l2p_update_fn *update_l2p, void *priv) |
660 | { | |
da2d7cb8 JG |
661 | struct nvm_dev *dev = tgt_dev->parent; |
662 | ||
959e911b JG |
663 | if (!dev->ops->get_l2p_tbl) |
664 | return 0; | |
665 | ||
666 | return dev->ops->get_l2p_tbl(dev, slba, nlb, update_l2p, priv); | |
667 | } | |
668 | EXPORT_SYMBOL(nvm_get_l2p_tbl); | |
669 | ||
da2d7cb8 | 670 | int nvm_get_area(struct nvm_tgt_dev *tgt_dev, sector_t *lba, sector_t len) |
959e911b | 671 | { |
da2d7cb8 | 672 | struct nvm_dev *dev = tgt_dev->parent; |
ade69e24 MB |
673 | struct nvm_geo *geo = &dev->geo; |
674 | struct nvm_area *area, *prev, *next; | |
675 | sector_t begin = 0; | |
676 | sector_t max_sectors = (geo->sec_size * dev->total_secs) >> 9; | |
677 | ||
678 | if (len > max_sectors) | |
679 | return -EINVAL; | |
680 | ||
681 | area = kmalloc(sizeof(struct nvm_area), GFP_KERNEL); | |
682 | if (!area) | |
683 | return -ENOMEM; | |
684 | ||
685 | prev = NULL; | |
686 | ||
687 | spin_lock(&dev->lock); | |
688 | list_for_each_entry(next, &dev->area_list, list) { | |
689 | if (begin + len > next->begin) { | |
690 | begin = next->end; | |
691 | prev = next; | |
692 | continue; | |
693 | } | |
694 | break; | |
695 | } | |
696 | ||
697 | if ((begin + len) > max_sectors) { | |
698 | spin_unlock(&dev->lock); | |
699 | kfree(area); | |
700 | return -EINVAL; | |
701 | } | |
da2d7cb8 | 702 | |
ade69e24 MB |
703 | area->begin = *lba = begin; |
704 | area->end = begin + len; | |
705 | ||
706 | if (prev) /* insert into sorted order */ | |
707 | list_add(&area->list, &prev->list); | |
708 | else | |
709 | list_add(&area->list, &dev->area_list); | |
710 | spin_unlock(&dev->lock); | |
711 | ||
712 | return 0; | |
959e911b JG |
713 | } |
714 | EXPORT_SYMBOL(nvm_get_area); | |
715 | ||
ade69e24 | 716 | void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin) |
959e911b | 717 | { |
da2d7cb8 | 718 | struct nvm_dev *dev = tgt_dev->parent; |
ade69e24 | 719 | struct nvm_area *area; |
da2d7cb8 | 720 | |
ade69e24 MB |
721 | spin_lock(&dev->lock); |
722 | list_for_each_entry(area, &dev->area_list, list) { | |
723 | if (area->begin != begin) | |
724 | continue; | |
725 | ||
726 | list_del(&area->list); | |
727 | spin_unlock(&dev->lock); | |
728 | kfree(area); | |
729 | return; | |
730 | } | |
731 | spin_unlock(&dev->lock); | |
959e911b JG |
732 | } |
733 | EXPORT_SYMBOL(nvm_put_area); | |
734 | ||
abd805ec | 735 | int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, |
8680f165 | 736 | const struct ppa_addr *ppas, int nr_ppas, int vblk) |
069368e9 | 737 | { |
8e79b5cb | 738 | struct nvm_geo *geo = &dev->geo; |
abd805ec | 739 | int i, plane_cnt, pl_idx; |
8680f165 | 740 | struct ppa_addr ppa; |
abd805ec | 741 | |
8e79b5cb | 742 | if ((!vblk || geo->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) { |
6d5be959 | 743 | rqd->nr_ppas = nr_ppas; |
abd805ec | 744 | rqd->ppa_addr = ppas[0]; |
069368e9 | 745 | |
069368e9 | 746 | return 0; |
abd805ec | 747 | } |
069368e9 | 748 | |
6d5be959 | 749 | rqd->nr_ppas = nr_ppas; |
abd805ec MB |
750 | rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); |
751 | if (!rqd->ppa_list) { | |
752 | pr_err("nvm: failed to allocate dma memory\n"); | |
753 | return -ENOMEM; | |
754 | } | |
755 | ||
5ebc7d9f MB |
756 | if (!vblk) { |
757 | for (i = 0; i < nr_ppas; i++) | |
758 | rqd->ppa_list[i] = ppas[i]; | |
759 | } else { | |
8e79b5cb | 760 | plane_cnt = geo->plane_mode; |
6d5be959 | 761 | rqd->nr_ppas *= plane_cnt; |
5ebc7d9f | 762 | |
556755e9 | 763 | for (i = 0; i < nr_ppas; i++) { |
5ebc7d9f | 764 | for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { |
8680f165 MB |
765 | ppa = ppas[i]; |
766 | ppa.g.pl = pl_idx; | |
767 | rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa; | |
5ebc7d9f | 768 | } |
069368e9 MB |
769 | } |
770 | } | |
771 | ||
abd805ec MB |
772 | return 0; |
773 | } | |
774 | EXPORT_SYMBOL(nvm_set_rqd_ppalist); | |
775 | ||
776 | void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd) | |
777 | { | |
778 | if (!rqd->ppa_list) | |
779 | return; | |
780 | ||
781 | nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list); | |
782 | } | |
783 | EXPORT_SYMBOL(nvm_free_rqd_ppalist); | |
784 | ||
06894efe | 785 | void nvm_end_io(struct nvm_rq *rqd) |
91276162 | 786 | { |
ade69e24 | 787 | struct nvm_tgt_dev *tgt_dev = rqd->dev; |
ade69e24 MB |
788 | |
789 | /* Convert address space */ | |
790 | if (tgt_dev) | |
dab8ee9e | 791 | nvm_rq_dev_to_tgt(tgt_dev, rqd); |
ade69e24 | 792 | |
06894efe MB |
793 | if (rqd->end_io) |
794 | rqd->end_io(rqd); | |
91276162 MB |
795 | } |
796 | EXPORT_SYMBOL(nvm_end_io); | |
797 | ||
22e8c976 MB |
798 | /* |
799 | * folds a bad block list from its plane representation to its virtual | |
800 | * block representation. The fold is done in place and reduced size is | |
801 | * returned. | |
802 | * | |
803 | * If any of the planes status are bad or grown bad block, the virtual block | |
804 | * is marked bad. If not bad, the first plane state acts as the block state. | |
805 | */ | |
806 | int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) | |
807 | { | |
8e79b5cb | 808 | struct nvm_geo *geo = &dev->geo; |
22e8c976 MB |
809 | int blk, offset, pl, blktype; |
810 | ||
8e79b5cb | 811 | if (nr_blks != geo->blks_per_lun * geo->plane_mode) |
22e8c976 MB |
812 | return -EINVAL; |
813 | ||
8e79b5cb JG |
814 | for (blk = 0; blk < geo->blks_per_lun; blk++) { |
815 | offset = blk * geo->plane_mode; | |
22e8c976 MB |
816 | blktype = blks[offset]; |
817 | ||
818 | /* Bad blocks on any planes take precedence over other types */ | |
8e79b5cb | 819 | for (pl = 0; pl < geo->plane_mode; pl++) { |
22e8c976 MB |
820 | if (blks[offset + pl] & |
821 | (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { | |
822 | blktype = blks[offset + pl]; | |
823 | break; | |
824 | } | |
825 | } | |
826 | ||
827 | blks[blk] = blktype; | |
828 | } | |
829 | ||
8e79b5cb | 830 | return geo->blks_per_lun; |
22e8c976 MB |
831 | } |
832 | EXPORT_SYMBOL(nvm_bb_tbl_fold); | |
833 | ||
333ba053 JG |
834 | int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa, |
835 | u8 *blks) | |
836 | { | |
8f4fe008 MB |
837 | struct nvm_dev *dev = tgt_dev->parent; |
838 | ||
dab8ee9e | 839 | nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1); |
333ba053 | 840 | |
8f4fe008 | 841 | return dev->ops->get_bb_tbl(dev, ppa, blks); |
333ba053 JG |
842 | } |
843 | EXPORT_SYMBOL(nvm_get_tgt_bb_tbl); | |
844 | ||
ca5927e7 MB |
845 | static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) |
846 | { | |
8e79b5cb | 847 | struct nvm_geo *geo = &dev->geo; |
ca5927e7 MB |
848 | int i; |
849 | ||
8e79b5cb | 850 | dev->lps_per_blk = geo->pgs_per_blk; |
ca5927e7 MB |
851 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); |
852 | if (!dev->lptbl) | |
853 | return -ENOMEM; | |
854 | ||
855 | /* Just a linear array */ | |
856 | for (i = 0; i < dev->lps_per_blk; i++) | |
857 | dev->lptbl[i] = i; | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
862 | static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) | |
863 | { | |
864 | int i, p; | |
865 | struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc; | |
866 | ||
867 | if (!mlc->num_pairs) | |
868 | return 0; | |
869 | ||
870 | dev->lps_per_blk = mlc->num_pairs; | |
871 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
872 | if (!dev->lptbl) | |
873 | return -ENOMEM; | |
874 | ||
875 | /* The lower page table encoding consists of a list of bytes, where each | |
876 | * has a lower and an upper half. The first half byte maintains the | |
877 | * increment value and every value after is an offset added to the | |
12624af2 MB |
878 | * previous incrementation value |
879 | */ | |
ca5927e7 MB |
880 | dev->lptbl[0] = mlc->pairs[0] & 0xF; |
881 | for (i = 1; i < dev->lps_per_blk; i++) { | |
882 | p = mlc->pairs[i >> 1]; | |
883 | if (i & 0x1) /* upper */ | |
884 | dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4); | |
885 | else /* lower */ | |
886 | dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF); | |
887 | } | |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
cd9e9808 MB |
892 | static int nvm_core_init(struct nvm_dev *dev) |
893 | { | |
894 | struct nvm_id *id = &dev->identity; | |
19bd6fe7 | 895 | struct nvm_id_group *grp = &id->grp; |
8e79b5cb | 896 | struct nvm_geo *geo = &dev->geo; |
7f7c5d03 | 897 | int ret; |
cd9e9808 | 898 | |
8e79b5cb JG |
899 | /* Whole device values */ |
900 | geo->nr_chnls = grp->num_ch; | |
901 | geo->luns_per_chnl = grp->num_lun; | |
902 | ||
903 | /* Generic device values */ | |
904 | geo->pgs_per_blk = grp->num_pg; | |
905 | geo->blks_per_lun = grp->num_blk; | |
906 | geo->nr_planes = grp->num_pln; | |
907 | geo->fpg_size = grp->fpg_sz; | |
908 | geo->pfpg_size = grp->fpg_sz * grp->num_pln; | |
909 | geo->sec_size = grp->csecs; | |
910 | geo->oob_size = grp->sos; | |
911 | geo->sec_per_pg = grp->fpg_sz / grp->csecs; | |
912 | geo->mccap = grp->mccap; | |
913 | memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); | |
914 | ||
915 | geo->plane_mode = NVM_PLANE_SINGLE; | |
916 | geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size; | |
cd9e9808 MB |
917 | |
918 | if (grp->mpos & 0x020202) | |
8e79b5cb | 919 | geo->plane_mode = NVM_PLANE_DOUBLE; |
cd9e9808 | 920 | if (grp->mpos & 0x040404) |
8e79b5cb | 921 | geo->plane_mode = NVM_PLANE_QUAD; |
cd9e9808 | 922 | |
7f7c5d03 MB |
923 | if (grp->mtype != 0) { |
924 | pr_err("nvm: memory type not supported\n"); | |
925 | return -EINVAL; | |
926 | } | |
927 | ||
cd9e9808 | 928 | /* calculated values */ |
8e79b5cb JG |
929 | geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes; |
930 | geo->sec_per_blk = geo->sec_per_pl * geo->pgs_per_blk; | |
931 | geo->sec_per_lun = geo->sec_per_blk * geo->blks_per_lun; | |
932 | geo->nr_luns = geo->luns_per_chnl * geo->nr_chnls; | |
cd9e9808 | 933 | |
8e79b5cb JG |
934 | dev->total_secs = geo->nr_luns * geo->sec_per_lun; |
935 | dev->lun_map = kcalloc(BITS_TO_LONGS(geo->nr_luns), | |
da1e2849 WT |
936 | sizeof(unsigned long), GFP_KERNEL); |
937 | if (!dev->lun_map) | |
938 | return -ENOMEM; | |
7f7c5d03 MB |
939 | |
940 | switch (grp->fmtype) { | |
941 | case NVM_ID_FMTYPE_SLC: | |
942 | if (nvm_init_slc_tbl(dev, grp)) { | |
943 | ret = -ENOMEM; | |
944 | goto err_fmtype; | |
945 | } | |
946 | break; | |
947 | case NVM_ID_FMTYPE_MLC: | |
948 | if (nvm_init_mlc_tbl(dev, grp)) { | |
949 | ret = -ENOMEM; | |
950 | goto err_fmtype; | |
951 | } | |
952 | break; | |
953 | default: | |
954 | pr_err("nvm: flash type not supported\n"); | |
955 | ret = -EINVAL; | |
956 | goto err_fmtype; | |
957 | } | |
958 | ||
ade69e24 MB |
959 | INIT_LIST_HEAD(&dev->area_list); |
960 | INIT_LIST_HEAD(&dev->targets); | |
e3eb3799 | 961 | mutex_init(&dev->mlock); |
4c9dacb8 | 962 | spin_lock_init(&dev->lock); |
cd9e9808 | 963 | |
ade69e24 MB |
964 | ret = nvm_register_map(dev); |
965 | if (ret) | |
966 | goto err_fmtype; | |
ac81bfa9 | 967 | |
ade69e24 | 968 | blk_queue_logical_block_size(dev->q, geo->sec_size); |
cd9e9808 | 969 | return 0; |
7f7c5d03 MB |
970 | err_fmtype: |
971 | kfree(dev->lun_map); | |
972 | return ret; | |
cd9e9808 MB |
973 | } |
974 | ||
40267efd | 975 | void nvm_free(struct nvm_dev *dev) |
cd9e9808 MB |
976 | { |
977 | if (!dev) | |
978 | return; | |
979 | ||
40267efd SL |
980 | if (dev->dma_pool) |
981 | dev->ops->destroy_dma_pool(dev->dma_pool); | |
982 | ||
ade69e24 | 983 | kfree(dev->rmap); |
ca5927e7 | 984 | kfree(dev->lptbl); |
7f7c5d03 | 985 | kfree(dev->lun_map); |
40267efd | 986 | kfree(dev); |
cd9e9808 MB |
987 | } |
988 | ||
989 | static int nvm_init(struct nvm_dev *dev) | |
990 | { | |
8e79b5cb | 991 | struct nvm_geo *geo = &dev->geo; |
480fc0db | 992 | int ret = -EINVAL; |
cd9e9808 | 993 | |
16f26c3a | 994 | if (dev->ops->identity(dev, &dev->identity)) { |
cd9e9808 | 995 | pr_err("nvm: device could not be identified\n"); |
cd9e9808 MB |
996 | goto err; |
997 | } | |
998 | ||
19bd6fe7 MB |
999 | pr_debug("nvm: ver:%x nvm_vendor:%x\n", |
1000 | dev->identity.ver_id, dev->identity.vmnt); | |
cd9e9808 MB |
1001 | |
1002 | if (dev->identity.ver_id != 1) { | |
1003 | pr_err("nvm: device not supported by kernel."); | |
1004 | goto err; | |
1005 | } | |
1006 | ||
cd9e9808 MB |
1007 | ret = nvm_core_init(dev); |
1008 | if (ret) { | |
1009 | pr_err("nvm: could not initialize core structures.\n"); | |
1010 | goto err; | |
1011 | } | |
1012 | ||
cd9e9808 | 1013 | pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", |
8e79b5cb JG |
1014 | dev->name, geo->sec_per_pg, geo->nr_planes, |
1015 | geo->pgs_per_blk, geo->blks_per_lun, | |
1016 | geo->nr_luns, geo->nr_chnls); | |
cd9e9808 MB |
1017 | return 0; |
1018 | err: | |
cd9e9808 MB |
1019 | pr_err("nvm: failed to initialize nvm\n"); |
1020 | return ret; | |
1021 | } | |
1022 | ||
b0b4e09c | 1023 | struct nvm_dev *nvm_alloc_dev(int node) |
cd9e9808 | 1024 | { |
b0b4e09c | 1025 | return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node); |
cd9e9808 | 1026 | } |
b0b4e09c | 1027 | EXPORT_SYMBOL(nvm_alloc_dev); |
cd9e9808 | 1028 | |
b0b4e09c | 1029 | int nvm_register(struct nvm_dev *dev) |
cd9e9808 | 1030 | { |
cd9e9808 MB |
1031 | int ret; |
1032 | ||
ade69e24 MB |
1033 | if (!dev->q || !dev->ops) |
1034 | return -EINVAL; | |
cd9e9808 | 1035 | |
d160147b WT |
1036 | if (dev->ops->max_phys_sect > 256) { |
1037 | pr_info("nvm: max sectors supported is 256.\n"); | |
ade69e24 | 1038 | return -EINVAL; |
d160147b WT |
1039 | } |
1040 | ||
cd9e9808 | 1041 | if (dev->ops->max_phys_sect > 1) { |
75b85649 JG |
1042 | dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist"); |
1043 | if (!dev->dma_pool) { | |
1044 | pr_err("nvm: could not create dma pool\n"); | |
ade69e24 | 1045 | return -ENOMEM; |
cd9e9808 | 1046 | } |
cd9e9808 MB |
1047 | } |
1048 | ||
ade69e24 MB |
1049 | ret = nvm_init(dev); |
1050 | if (ret) | |
1051 | goto err_init; | |
b7692076 | 1052 | |
762796bc | 1053 | /* register device with a supported media manager */ |
edad2e66 MB |
1054 | down_write(&nvm_lock); |
1055 | list_add(&dev->devices, &nvm_devices); | |
1056 | up_write(&nvm_lock); | |
1057 | ||
cd9e9808 MB |
1058 | return 0; |
1059 | err_init: | |
ade69e24 | 1060 | dev->ops->destroy_dma_pool(dev->dma_pool); |
cd9e9808 MB |
1061 | return ret; |
1062 | } | |
1063 | EXPORT_SYMBOL(nvm_register); | |
1064 | ||
b0b4e09c | 1065 | void nvm_unregister(struct nvm_dev *dev) |
cd9e9808 | 1066 | { |
ade69e24 MB |
1067 | struct nvm_target *t, *tmp; |
1068 | ||
1069 | mutex_lock(&dev->mlock); | |
1070 | list_for_each_entry_safe(t, tmp, &dev->targets, list) { | |
1071 | if (t->dev->parent != dev) | |
1072 | continue; | |
1073 | __nvm_remove_target(t); | |
1074 | } | |
1075 | mutex_unlock(&dev->mlock); | |
1076 | ||
d0a712ce | 1077 | down_write(&nvm_lock); |
cd9e9808 MB |
1078 | list_del(&dev->devices); |
1079 | up_write(&nvm_lock); | |
c1480ad5 | 1080 | |
3dc87dd0 | 1081 | nvm_free(dev); |
cd9e9808 MB |
1082 | } |
1083 | EXPORT_SYMBOL(nvm_unregister); | |
1084 | ||
cd9e9808 MB |
1085 | static int __nvm_configure_create(struct nvm_ioctl_create *create) |
1086 | { | |
1087 | struct nvm_dev *dev; | |
1088 | struct nvm_ioctl_create_simple *s; | |
1089 | ||
d0a712ce | 1090 | down_write(&nvm_lock); |
cd9e9808 | 1091 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 1092 | up_write(&nvm_lock); |
b76eb20b | 1093 | |
cd9e9808 MB |
1094 | if (!dev) { |
1095 | pr_err("nvm: device not found\n"); | |
1096 | return -EINVAL; | |
1097 | } | |
1098 | ||
1099 | if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) { | |
1100 | pr_err("nvm: config type not valid\n"); | |
1101 | return -EINVAL; | |
1102 | } | |
1103 | s = &create->conf.s; | |
1104 | ||
6732c740 MB |
1105 | if (s->lun_begin == -1 && s->lun_end == -1) { |
1106 | s->lun_begin = 0; | |
1107 | s->lun_end = dev->geo.nr_luns - 1; | |
1108 | } | |
1109 | ||
0e5ffd1c | 1110 | if (s->lun_begin > s->lun_end || s->lun_end >= dev->geo.nr_luns) { |
cd9e9808 | 1111 | pr_err("nvm: lun out of bound (%u:%u > %u)\n", |
0e5ffd1c | 1112 | s->lun_begin, s->lun_end, dev->geo.nr_luns - 1); |
cd9e9808 MB |
1113 | return -EINVAL; |
1114 | } | |
1115 | ||
ade69e24 | 1116 | return nvm_create_tgt(dev, create); |
cd9e9808 MB |
1117 | } |
1118 | ||
cd9e9808 MB |
1119 | static long nvm_ioctl_info(struct file *file, void __user *arg) |
1120 | { | |
1121 | struct nvm_ioctl_info *info; | |
1122 | struct nvm_tgt_type *tt; | |
1123 | int tgt_iter = 0; | |
1124 | ||
1125 | if (!capable(CAP_SYS_ADMIN)) | |
1126 | return -EPERM; | |
1127 | ||
1128 | info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); | |
1129 | if (IS_ERR(info)) | |
1130 | return -EFAULT; | |
1131 | ||
1132 | info->version[0] = NVM_VERSION_MAJOR; | |
1133 | info->version[1] = NVM_VERSION_MINOR; | |
1134 | info->version[2] = NVM_VERSION_PATCH; | |
1135 | ||
1136 | down_write(&nvm_lock); | |
6063fe39 | 1137 | list_for_each_entry(tt, &nvm_tgt_types, list) { |
cd9e9808 MB |
1138 | struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; |
1139 | ||
1140 | tgt->version[0] = tt->version[0]; | |
1141 | tgt->version[1] = tt->version[1]; | |
1142 | tgt->version[2] = tt->version[2]; | |
1143 | strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); | |
1144 | ||
1145 | tgt_iter++; | |
1146 | } | |
1147 | ||
1148 | info->tgtsize = tgt_iter; | |
1149 | up_write(&nvm_lock); | |
1150 | ||
76e25081 SM |
1151 | if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { |
1152 | kfree(info); | |
cd9e9808 | 1153 | return -EFAULT; |
76e25081 | 1154 | } |
cd9e9808 MB |
1155 | |
1156 | kfree(info); | |
1157 | return 0; | |
1158 | } | |
1159 | ||
1160 | static long nvm_ioctl_get_devices(struct file *file, void __user *arg) | |
1161 | { | |
1162 | struct nvm_ioctl_get_devices *devices; | |
1163 | struct nvm_dev *dev; | |
1164 | int i = 0; | |
1165 | ||
1166 | if (!capable(CAP_SYS_ADMIN)) | |
1167 | return -EPERM; | |
1168 | ||
1169 | devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); | |
1170 | if (!devices) | |
1171 | return -ENOMEM; | |
1172 | ||
1173 | down_write(&nvm_lock); | |
1174 | list_for_each_entry(dev, &nvm_devices, devices) { | |
1175 | struct nvm_ioctl_device_info *info = &devices->info[i]; | |
1176 | ||
1177 | sprintf(info->devname, "%s", dev->name); | |
cd9e9808 | 1178 | |
ade69e24 MB |
1179 | /* kept for compatibility */ |
1180 | info->bmversion[0] = 1; | |
1181 | info->bmversion[1] = 0; | |
1182 | info->bmversion[2] = 0; | |
1183 | sprintf(info->bmname, "%s", "gennvm"); | |
cd9e9808 | 1184 | i++; |
ade69e24 | 1185 | |
cd9e9808 MB |
1186 | if (i > 31) { |
1187 | pr_err("nvm: max 31 devices can be reported.\n"); | |
1188 | break; | |
1189 | } | |
1190 | } | |
1191 | up_write(&nvm_lock); | |
1192 | ||
1193 | devices->nr_devices = i; | |
1194 | ||
76e25081 SM |
1195 | if (copy_to_user(arg, devices, |
1196 | sizeof(struct nvm_ioctl_get_devices))) { | |
1197 | kfree(devices); | |
cd9e9808 | 1198 | return -EFAULT; |
76e25081 | 1199 | } |
cd9e9808 MB |
1200 | |
1201 | kfree(devices); | |
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
1206 | { | |
1207 | struct nvm_ioctl_create create; | |
1208 | ||
1209 | if (!capable(CAP_SYS_ADMIN)) | |
1210 | return -EPERM; | |
1211 | ||
1212 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) | |
1213 | return -EFAULT; | |
1214 | ||
1215 | create.dev[DISK_NAME_LEN - 1] = '\0'; | |
1216 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
1217 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1218 | ||
1219 | if (create.flags != 0) { | |
1220 | pr_err("nvm: no flags supported\n"); | |
1221 | return -EINVAL; | |
1222 | } | |
1223 | ||
1224 | return __nvm_configure_create(&create); | |
1225 | } | |
1226 | ||
1227 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
1228 | { | |
1229 | struct nvm_ioctl_remove remove; | |
b76eb20b MB |
1230 | struct nvm_dev *dev; |
1231 | int ret = 0; | |
cd9e9808 MB |
1232 | |
1233 | if (!capable(CAP_SYS_ADMIN)) | |
1234 | return -EPERM; | |
1235 | ||
1236 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) | |
1237 | return -EFAULT; | |
1238 | ||
1239 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1240 | ||
1241 | if (remove.flags != 0) { | |
1242 | pr_err("nvm: no flags supported\n"); | |
1243 | return -EINVAL; | |
1244 | } | |
1245 | ||
b76eb20b | 1246 | list_for_each_entry(dev, &nvm_devices, devices) { |
ade69e24 | 1247 | ret = nvm_remove_tgt(dev, &remove); |
b76eb20b MB |
1248 | if (!ret) |
1249 | break; | |
1250 | } | |
1251 | ||
1252 | return ret; | |
cd9e9808 MB |
1253 | } |
1254 | ||
ade69e24 | 1255 | /* kept for compatibility reasons */ |
55696154 MB |
1256 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) |
1257 | { | |
1258 | struct nvm_ioctl_dev_init init; | |
1259 | ||
1260 | if (!capable(CAP_SYS_ADMIN)) | |
1261 | return -EPERM; | |
1262 | ||
1263 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) | |
1264 | return -EFAULT; | |
1265 | ||
1266 | if (init.flags != 0) { | |
1267 | pr_err("nvm: no flags supported\n"); | |
1268 | return -EINVAL; | |
1269 | } | |
1270 | ||
ade69e24 | 1271 | return 0; |
55696154 MB |
1272 | } |
1273 | ||
ade69e24 | 1274 | /* Kept for compatibility reasons */ |
8b4970c4 MB |
1275 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
1276 | { | |
1277 | struct nvm_ioctl_dev_factory fact; | |
8b4970c4 MB |
1278 | |
1279 | if (!capable(CAP_SYS_ADMIN)) | |
1280 | return -EPERM; | |
1281 | ||
1282 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) | |
1283 | return -EFAULT; | |
1284 | ||
1285 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1286 | ||
1287 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1288 | return -EINVAL; | |
1289 | ||
bf643185 | 1290 | return 0; |
8b4970c4 MB |
1291 | } |
1292 | ||
cd9e9808 MB |
1293 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1294 | { | |
1295 | void __user *argp = (void __user *)arg; | |
1296 | ||
1297 | switch (cmd) { | |
1298 | case NVM_INFO: | |
1299 | return nvm_ioctl_info(file, argp); | |
1300 | case NVM_GET_DEVICES: | |
1301 | return nvm_ioctl_get_devices(file, argp); | |
1302 | case NVM_DEV_CREATE: | |
1303 | return nvm_ioctl_dev_create(file, argp); | |
1304 | case NVM_DEV_REMOVE: | |
1305 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1306 | case NVM_DEV_INIT: |
1307 | return nvm_ioctl_dev_init(file, argp); | |
8b4970c4 MB |
1308 | case NVM_DEV_FACTORY: |
1309 | return nvm_ioctl_dev_factory(file, argp); | |
cd9e9808 MB |
1310 | } |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static const struct file_operations _ctl_fops = { | |
1315 | .open = nonseekable_open, | |
1316 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1317 | .owner = THIS_MODULE, | |
1318 | .llseek = noop_llseek, | |
1319 | }; | |
1320 | ||
1321 | static struct miscdevice _nvm_misc = { | |
1322 | .minor = MISC_DYNAMIC_MINOR, | |
1323 | .name = "lightnvm", | |
1324 | .nodename = "lightnvm/control", | |
1325 | .fops = &_ctl_fops, | |
1326 | }; | |
389b2a1c | 1327 | builtin_misc_device(_nvm_misc); |