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cd9e9808 MB |
1 | /* |
2 | * Copyright (C) 2015 IT University of Copenhagen. All rights reserved. | |
3 | * Initial release: Matias Bjorling <m@bjorling.me> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License version | |
7 | * 2 as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; see the file COPYING. If not, write to | |
16 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, | |
17 | * USA. | |
18 | * | |
19 | */ | |
20 | ||
cd9e9808 MB |
21 | #include <linux/list.h> |
22 | #include <linux/types.h> | |
23 | #include <linux/sem.h> | |
24 | #include <linux/bitmap.h> | |
389b2a1c | 25 | #include <linux/moduleparam.h> |
cd9e9808 MB |
26 | #include <linux/miscdevice.h> |
27 | #include <linux/lightnvm.h> | |
91276162 | 28 | #include <linux/sched/sysctl.h> |
cd9e9808 | 29 | |
6063fe39 | 30 | static LIST_HEAD(nvm_tgt_types); |
5cd90785 | 31 | static DECLARE_RWSEM(nvm_tgtt_lock); |
cd9e9808 MB |
32 | static LIST_HEAD(nvm_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 | ||
53 | enum { | |
54 | TRANS_TGT_TO_DEV = 0x0, | |
55 | TRANS_DEV_TO_TGT = 0x1, | |
56 | }; | |
57 | ||
58 | static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name) | |
59 | { | |
60 | struct nvm_target *tgt; | |
61 | ||
62 | list_for_each_entry(tgt, &dev->targets, list) | |
63 | if (!strcmp(name, tgt->disk->disk_name)) | |
64 | return tgt; | |
65 | ||
66 | return NULL; | |
67 | } | |
68 | ||
69 | static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end) | |
70 | { | |
71 | int i; | |
72 | ||
73 | for (i = lun_begin; i <= lun_end; i++) { | |
74 | if (test_and_set_bit(i, dev->lun_map)) { | |
75 | pr_err("nvm: lun %d already allocated\n", i); | |
76 | goto err; | |
77 | } | |
78 | } | |
79 | ||
80 | return 0; | |
81 | err: | |
82 | while (--i > lun_begin) | |
83 | clear_bit(i, dev->lun_map); | |
84 | ||
85 | return -EBUSY; | |
86 | } | |
87 | ||
88 | static void nvm_release_luns_err(struct nvm_dev *dev, int lun_begin, | |
89 | int lun_end) | |
90 | { | |
91 | int i; | |
92 | ||
93 | for (i = lun_begin; i <= lun_end; i++) | |
94 | WARN_ON(!test_and_clear_bit(i, dev->lun_map)); | |
95 | } | |
96 | ||
97 | static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev) | |
98 | { | |
99 | struct nvm_dev *dev = tgt_dev->parent; | |
100 | struct nvm_dev_map *dev_map = tgt_dev->map; | |
101 | int i, j; | |
102 | ||
103 | for (i = 0; i < dev_map->nr_chnls; i++) { | |
104 | struct nvm_ch_map *ch_map = &dev_map->chnls[i]; | |
105 | int *lun_offs = ch_map->lun_offs; | |
106 | int ch = i + ch_map->ch_off; | |
107 | ||
108 | for (j = 0; j < ch_map->nr_luns; j++) { | |
109 | int lun = j + lun_offs[j]; | |
110 | int lunid = (ch * dev->geo.luns_per_chnl) + lun; | |
111 | ||
112 | WARN_ON(!test_and_clear_bit(lunid, dev->lun_map)); | |
113 | } | |
114 | ||
115 | kfree(ch_map->lun_offs); | |
116 | } | |
117 | ||
118 | kfree(dev_map->chnls); | |
119 | kfree(dev_map); | |
120 | ||
121 | kfree(tgt_dev->luns); | |
122 | kfree(tgt_dev); | |
123 | } | |
124 | ||
125 | static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev, | |
126 | int lun_begin, int lun_end) | |
127 | { | |
128 | struct nvm_tgt_dev *tgt_dev = NULL; | |
129 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
130 | struct nvm_dev_map *dev_map; | |
131 | struct ppa_addr *luns; | |
132 | int nr_luns = lun_end - lun_begin + 1; | |
133 | int luns_left = nr_luns; | |
134 | int nr_chnls = nr_luns / dev->geo.luns_per_chnl; | |
135 | int nr_chnls_mod = nr_luns % dev->geo.luns_per_chnl; | |
136 | int bch = lun_begin / dev->geo.luns_per_chnl; | |
137 | int blun = lun_begin % dev->geo.luns_per_chnl; | |
138 | int lunid = 0; | |
139 | int lun_balanced = 1; | |
140 | int prev_nr_luns; | |
141 | int i, j; | |
142 | ||
143 | nr_chnls = nr_luns / dev->geo.luns_per_chnl; | |
144 | nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1; | |
145 | ||
146 | dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
147 | if (!dev_map) | |
148 | goto err_dev; | |
149 | ||
150 | dev_map->chnls = kcalloc(nr_chnls, sizeof(struct nvm_ch_map), | |
151 | GFP_KERNEL); | |
152 | if (!dev_map->chnls) | |
153 | goto err_chnls; | |
154 | ||
155 | luns = kcalloc(nr_luns, sizeof(struct ppa_addr), GFP_KERNEL); | |
156 | if (!luns) | |
157 | goto err_luns; | |
158 | ||
159 | prev_nr_luns = (luns_left > dev->geo.luns_per_chnl) ? | |
160 | dev->geo.luns_per_chnl : luns_left; | |
161 | for (i = 0; i < nr_chnls; i++) { | |
162 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch]; | |
163 | int *lun_roffs = ch_rmap->lun_offs; | |
164 | struct nvm_ch_map *ch_map = &dev_map->chnls[i]; | |
165 | int *lun_offs; | |
166 | int luns_in_chnl = (luns_left > dev->geo.luns_per_chnl) ? | |
167 | dev->geo.luns_per_chnl : luns_left; | |
168 | ||
169 | if (lun_balanced && prev_nr_luns != luns_in_chnl) | |
170 | lun_balanced = 0; | |
171 | ||
172 | ch_map->ch_off = ch_rmap->ch_off = bch; | |
173 | ch_map->nr_luns = luns_in_chnl; | |
174 | ||
175 | lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
176 | if (!lun_offs) | |
177 | goto err_ch; | |
178 | ||
179 | for (j = 0; j < luns_in_chnl; j++) { | |
180 | luns[lunid].ppa = 0; | |
181 | luns[lunid].g.ch = i; | |
182 | luns[lunid++].g.lun = j; | |
183 | ||
184 | lun_offs[j] = blun; | |
185 | lun_roffs[j + blun] = blun; | |
186 | } | |
187 | ||
188 | ch_map->lun_offs = lun_offs; | |
189 | ||
190 | /* when starting a new channel, lun offset is reset */ | |
191 | blun = 0; | |
192 | luns_left -= luns_in_chnl; | |
193 | } | |
194 | ||
195 | dev_map->nr_chnls = nr_chnls; | |
196 | ||
197 | tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL); | |
198 | if (!tgt_dev) | |
199 | goto err_ch; | |
200 | ||
201 | memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo)); | |
202 | /* Target device only owns a portion of the physical device */ | |
203 | tgt_dev->geo.nr_chnls = nr_chnls; | |
204 | tgt_dev->geo.nr_luns = nr_luns; | |
205 | tgt_dev->geo.luns_per_chnl = (lun_balanced) ? prev_nr_luns : -1; | |
206 | tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun; | |
207 | tgt_dev->q = dev->q; | |
208 | tgt_dev->map = dev_map; | |
209 | tgt_dev->luns = luns; | |
210 | memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id)); | |
211 | ||
212 | tgt_dev->parent = dev; | |
213 | ||
214 | return tgt_dev; | |
215 | err_ch: | |
216 | while (--i > 0) | |
217 | kfree(dev_map->chnls[i].lun_offs); | |
218 | kfree(luns); | |
219 | err_luns: | |
220 | kfree(dev_map->chnls); | |
221 | err_chnls: | |
222 | kfree(dev_map); | |
223 | err_dev: | |
224 | return tgt_dev; | |
225 | } | |
226 | ||
227 | static const struct block_device_operations nvm_fops = { | |
228 | .owner = THIS_MODULE, | |
229 | }; | |
230 | ||
231 | static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) | |
232 | { | |
233 | struct nvm_ioctl_create_simple *s = &create->conf.s; | |
234 | struct request_queue *tqueue; | |
235 | struct gendisk *tdisk; | |
236 | struct nvm_tgt_type *tt; | |
237 | struct nvm_target *t; | |
238 | struct nvm_tgt_dev *tgt_dev; | |
239 | void *targetdata; | |
240 | ||
241 | tt = nvm_find_target_type(create->tgttype, 1); | |
242 | if (!tt) { | |
243 | pr_err("nvm: target type %s not found\n", create->tgttype); | |
244 | return -EINVAL; | |
245 | } | |
246 | ||
247 | mutex_lock(&dev->mlock); | |
248 | t = nvm_find_target(dev, create->tgtname); | |
249 | if (t) { | |
250 | pr_err("nvm: target name already exists.\n"); | |
251 | mutex_unlock(&dev->mlock); | |
252 | return -EINVAL; | |
253 | } | |
254 | mutex_unlock(&dev->mlock); | |
255 | ||
256 | if (nvm_reserve_luns(dev, s->lun_begin, s->lun_end)) | |
257 | return -ENOMEM; | |
258 | ||
259 | t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); | |
260 | if (!t) | |
261 | goto err_reserve; | |
262 | ||
263 | tgt_dev = nvm_create_tgt_dev(dev, s->lun_begin, s->lun_end); | |
264 | if (!tgt_dev) { | |
265 | pr_err("nvm: could not create target device\n"); | |
266 | goto err_t; | |
267 | } | |
268 | ||
269 | tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node); | |
270 | if (!tqueue) | |
271 | goto err_dev; | |
272 | blk_queue_make_request(tqueue, tt->make_rq); | |
273 | ||
274 | tdisk = alloc_disk(0); | |
275 | if (!tdisk) | |
276 | goto err_queue; | |
277 | ||
278 | sprintf(tdisk->disk_name, "%s", create->tgtname); | |
279 | tdisk->flags = GENHD_FL_EXT_DEVT; | |
280 | tdisk->major = 0; | |
281 | tdisk->first_minor = 0; | |
282 | tdisk->fops = &nvm_fops; | |
283 | tdisk->queue = tqueue; | |
284 | ||
285 | targetdata = tt->init(tgt_dev, tdisk); | |
286 | if (IS_ERR(targetdata)) | |
287 | goto err_init; | |
288 | ||
289 | tdisk->private_data = targetdata; | |
290 | tqueue->queuedata = targetdata; | |
291 | ||
292 | blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect); | |
293 | ||
294 | set_capacity(tdisk, tt->capacity(targetdata)); | |
295 | add_disk(tdisk); | |
296 | ||
297 | t->type = tt; | |
298 | t->disk = tdisk; | |
299 | t->dev = tgt_dev; | |
300 | ||
301 | mutex_lock(&dev->mlock); | |
302 | list_add_tail(&t->list, &dev->targets); | |
303 | mutex_unlock(&dev->mlock); | |
304 | ||
305 | return 0; | |
306 | err_init: | |
307 | put_disk(tdisk); | |
308 | err_queue: | |
309 | blk_cleanup_queue(tqueue); | |
310 | err_dev: | |
311 | kfree(tgt_dev); | |
312 | err_t: | |
313 | kfree(t); | |
314 | err_reserve: | |
315 | nvm_release_luns_err(dev, s->lun_begin, s->lun_end); | |
316 | return -ENOMEM; | |
317 | } | |
318 | ||
319 | static void __nvm_remove_target(struct nvm_target *t) | |
320 | { | |
321 | struct nvm_tgt_type *tt = t->type; | |
322 | struct gendisk *tdisk = t->disk; | |
323 | struct request_queue *q = tdisk->queue; | |
324 | ||
325 | del_gendisk(tdisk); | |
326 | blk_cleanup_queue(q); | |
327 | ||
328 | if (tt->exit) | |
329 | tt->exit(tdisk->private_data); | |
330 | ||
331 | nvm_remove_tgt_dev(t->dev); | |
332 | put_disk(tdisk); | |
333 | ||
334 | list_del(&t->list); | |
335 | kfree(t); | |
336 | } | |
337 | ||
338 | /** | |
339 | * nvm_remove_tgt - Removes a target from the media manager | |
340 | * @dev: device | |
341 | * @remove: ioctl structure with target name to remove. | |
342 | * | |
343 | * Returns: | |
344 | * 0: on success | |
345 | * 1: on not found | |
346 | * <0: on error | |
347 | */ | |
348 | static int nvm_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove) | |
349 | { | |
350 | struct nvm_target *t; | |
351 | ||
352 | mutex_lock(&dev->mlock); | |
353 | t = nvm_find_target(dev, remove->tgtname); | |
354 | if (!t) { | |
355 | mutex_unlock(&dev->mlock); | |
356 | return 1; | |
357 | } | |
358 | __nvm_remove_target(t); | |
359 | mutex_unlock(&dev->mlock); | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | static int nvm_register_map(struct nvm_dev *dev) | |
365 | { | |
366 | struct nvm_dev_map *rmap; | |
367 | int i, j; | |
368 | ||
369 | rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
370 | if (!rmap) | |
371 | goto err_rmap; | |
372 | ||
373 | rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct nvm_ch_map), | |
374 | GFP_KERNEL); | |
375 | if (!rmap->chnls) | |
376 | goto err_chnls; | |
377 | ||
378 | for (i = 0; i < dev->geo.nr_chnls; i++) { | |
379 | struct nvm_ch_map *ch_rmap; | |
380 | int *lun_roffs; | |
381 | int luns_in_chnl = dev->geo.luns_per_chnl; | |
382 | ||
383 | ch_rmap = &rmap->chnls[i]; | |
384 | ||
385 | ch_rmap->ch_off = -1; | |
386 | ch_rmap->nr_luns = luns_in_chnl; | |
387 | ||
388 | lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
389 | if (!lun_roffs) | |
390 | goto err_ch; | |
391 | ||
392 | for (j = 0; j < luns_in_chnl; j++) | |
393 | lun_roffs[j] = -1; | |
394 | ||
395 | ch_rmap->lun_offs = lun_roffs; | |
396 | } | |
397 | ||
398 | dev->rmap = rmap; | |
399 | ||
400 | return 0; | |
401 | err_ch: | |
402 | while (--i >= 0) | |
403 | kfree(rmap->chnls[i].lun_offs); | |
404 | err_chnls: | |
405 | kfree(rmap); | |
406 | err_rmap: | |
407 | return -ENOMEM; | |
408 | } | |
409 | ||
61a561d8 | 410 | static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
411 | { |
412 | struct nvm_dev_map *dev_map = tgt_dev->map; | |
413 | struct nvm_ch_map *ch_map = &dev_map->chnls[p->g.ch]; | |
414 | int lun_off = ch_map->lun_offs[p->g.lun]; | |
ade69e24 MB |
415 | |
416 | p->g.ch += ch_map->ch_off; | |
417 | p->g.lun += lun_off; | |
ade69e24 MB |
418 | } |
419 | ||
61a561d8 | 420 | static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
421 | { |
422 | struct nvm_dev *dev = tgt_dev->parent; | |
423 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
424 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch]; | |
425 | int lun_roff = ch_rmap->lun_offs[p->g.lun]; | |
426 | ||
427 | p->g.ch -= ch_rmap->ch_off; | |
428 | p->g.lun -= lun_roff; | |
ade69e24 MB |
429 | } |
430 | ||
61a561d8 | 431 | static void nvm_trans_rq(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, |
ade69e24 MB |
432 | int flag) |
433 | { | |
434 | int i; | |
ade69e24 MB |
435 | |
436 | if (rqd->nr_ppas == 1) { | |
437 | if (flag == TRANS_TGT_TO_DEV) | |
61a561d8 | 438 | nvm_map_to_dev(tgt_dev, &rqd->ppa_addr); |
ade69e24 | 439 | else |
61a561d8 MB |
440 | nvm_map_to_tgt(tgt_dev, &rqd->ppa_addr); |
441 | return; | |
ade69e24 MB |
442 | } |
443 | ||
444 | for (i = 0; i < rqd->nr_ppas; i++) { | |
445 | if (flag == TRANS_TGT_TO_DEV) | |
61a561d8 | 446 | nvm_map_to_dev(tgt_dev, &rqd->ppa_list[i]); |
ade69e24 | 447 | else |
61a561d8 | 448 | nvm_map_to_tgt(tgt_dev, &rqd->ppa_list[i]); |
ade69e24 | 449 | } |
ade69e24 MB |
450 | } |
451 | ||
452 | static struct ppa_addr nvm_trans_ppa(struct nvm_tgt_dev *tgt_dev, | |
453 | struct ppa_addr p, int dir) | |
454 | { | |
455 | struct ppa_addr ppa = p; | |
456 | ||
457 | if (dir == TRANS_TGT_TO_DEV) | |
458 | nvm_map_to_dev(tgt_dev, &ppa); | |
459 | else | |
460 | nvm_map_to_tgt(tgt_dev, &ppa); | |
461 | ||
462 | return ppa; | |
463 | } | |
464 | ||
465 | void nvm_part_to_tgt(struct nvm_dev *dev, sector_t *entries, | |
466 | int len) | |
467 | { | |
468 | struct nvm_geo *geo = &dev->geo; | |
469 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
470 | u64 i; | |
471 | ||
472 | for (i = 0; i < len; i++) { | |
473 | struct nvm_ch_map *ch_rmap; | |
474 | int *lun_roffs; | |
475 | struct ppa_addr gaddr; | |
476 | u64 pba = le64_to_cpu(entries[i]); | |
477 | int off; | |
478 | u64 diff; | |
479 | ||
480 | if (!pba) | |
481 | continue; | |
482 | ||
483 | gaddr = linear_to_generic_addr(geo, pba); | |
484 | ch_rmap = &dev_rmap->chnls[gaddr.g.ch]; | |
485 | lun_roffs = ch_rmap->lun_offs; | |
486 | ||
487 | off = gaddr.g.ch * geo->luns_per_chnl + gaddr.g.lun; | |
488 | ||
489 | diff = ((ch_rmap->ch_off * geo->luns_per_chnl) + | |
490 | (lun_roffs[gaddr.g.lun])) * geo->sec_per_lun; | |
491 | ||
492 | entries[i] -= cpu_to_le64(diff); | |
493 | } | |
494 | } | |
495 | EXPORT_SYMBOL(nvm_part_to_tgt); | |
496 | ||
b76eb20b | 497 | struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock) |
6f8645cb | 498 | { |
b76eb20b | 499 | struct nvm_tgt_type *tmp, *tt = NULL; |
6f8645cb | 500 | |
b76eb20b | 501 | if (lock) |
5cd90785 | 502 | down_write(&nvm_tgtt_lock); |
6f8645cb | 503 | |
b76eb20b MB |
504 | list_for_each_entry(tmp, &nvm_tgt_types, list) |
505 | if (!strcmp(name, tmp->name)) { | |
506 | tt = tmp; | |
507 | break; | |
508 | } | |
cd9e9808 | 509 | |
b76eb20b | 510 | if (lock) |
5cd90785 | 511 | up_write(&nvm_tgtt_lock); |
b76eb20b | 512 | return tt; |
cd9e9808 | 513 | } |
b76eb20b | 514 | EXPORT_SYMBOL(nvm_find_target_type); |
cd9e9808 | 515 | |
6063fe39 | 516 | int nvm_register_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
517 | { |
518 | int ret = 0; | |
519 | ||
5cd90785 | 520 | down_write(&nvm_tgtt_lock); |
b76eb20b | 521 | if (nvm_find_target_type(tt->name, 0)) |
cd9e9808 MB |
522 | ret = -EEXIST; |
523 | else | |
6063fe39 | 524 | list_add(&tt->list, &nvm_tgt_types); |
5cd90785 | 525 | up_write(&nvm_tgtt_lock); |
cd9e9808 MB |
526 | |
527 | return ret; | |
528 | } | |
6063fe39 | 529 | EXPORT_SYMBOL(nvm_register_tgt_type); |
cd9e9808 | 530 | |
6063fe39 | 531 | void nvm_unregister_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
532 | { |
533 | if (!tt) | |
534 | return; | |
535 | ||
536 | down_write(&nvm_lock); | |
537 | list_del(&tt->list); | |
538 | up_write(&nvm_lock); | |
539 | } | |
6063fe39 | 540 | EXPORT_SYMBOL(nvm_unregister_tgt_type); |
cd9e9808 MB |
541 | |
542 | void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, | |
543 | dma_addr_t *dma_handler) | |
544 | { | |
75b85649 | 545 | return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags, |
cd9e9808 MB |
546 | dma_handler); |
547 | } | |
548 | EXPORT_SYMBOL(nvm_dev_dma_alloc); | |
549 | ||
da2d7cb8 | 550 | void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler) |
cd9e9808 | 551 | { |
75b85649 | 552 | dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler); |
cd9e9808 MB |
553 | } |
554 | EXPORT_SYMBOL(nvm_dev_dma_free); | |
555 | ||
cd9e9808 MB |
556 | static struct nvm_dev *nvm_find_nvm_dev(const char *name) |
557 | { | |
558 | struct nvm_dev *dev; | |
559 | ||
560 | list_for_each_entry(dev, &nvm_devices, devices) | |
561 | if (!strcmp(name, dev->name)) | |
562 | return dev; | |
563 | ||
564 | return NULL; | |
565 | } | |
566 | ||
333ba053 JG |
567 | static void nvm_tgt_generic_to_addr_mode(struct nvm_tgt_dev *tgt_dev, |
568 | struct nvm_rq *rqd) | |
569 | { | |
570 | struct nvm_dev *dev = tgt_dev->parent; | |
571 | int i; | |
572 | ||
573 | if (rqd->nr_ppas > 1) { | |
574 | for (i = 0; i < rqd->nr_ppas; i++) { | |
ade69e24 | 575 | rqd->ppa_list[i] = nvm_trans_ppa(tgt_dev, |
333ba053 JG |
576 | rqd->ppa_list[i], TRANS_TGT_TO_DEV); |
577 | rqd->ppa_list[i] = generic_to_dev_addr(dev, | |
578 | rqd->ppa_list[i]); | |
579 | } | |
580 | } else { | |
ade69e24 | 581 | rqd->ppa_addr = nvm_trans_ppa(tgt_dev, rqd->ppa_addr, |
333ba053 JG |
582 | TRANS_TGT_TO_DEV); |
583 | rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); | |
584 | } | |
585 | } | |
586 | ||
333ba053 JG |
587 | int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, |
588 | int nr_ppas, int type) | |
589 | { | |
590 | struct nvm_dev *dev = tgt_dev->parent; | |
591 | struct nvm_rq rqd; | |
592 | int ret; | |
593 | ||
594 | if (nr_ppas > dev->ops->max_phys_sect) { | |
595 | pr_err("nvm: unable to update all blocks atomically\n"); | |
596 | return -EINVAL; | |
597 | } | |
598 | ||
599 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
600 | ||
601 | nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1); | |
602 | nvm_tgt_generic_to_addr_mode(tgt_dev, &rqd); | |
603 | ||
604 | ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); | |
605 | nvm_free_rqd_ppalist(dev, &rqd); | |
606 | if (ret) { | |
ade69e24 | 607 | pr_err("nvm: failed bb mark\n"); |
333ba053 JG |
608 | return -EINVAL; |
609 | } | |
610 | ||
611 | return 0; | |
612 | } | |
613 | EXPORT_SYMBOL(nvm_set_tgt_bb_tbl); | |
614 | ||
a279006a JG |
615 | int nvm_max_phys_sects(struct nvm_tgt_dev *tgt_dev) |
616 | { | |
617 | struct nvm_dev *dev = tgt_dev->parent; | |
618 | ||
619 | return dev->ops->max_phys_sect; | |
620 | } | |
621 | EXPORT_SYMBOL(nvm_max_phys_sects); | |
622 | ||
8e53624d | 623 | int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
cd9e9808 | 624 | { |
8e53624d JG |
625 | struct nvm_dev *dev = tgt_dev->parent; |
626 | ||
ade69e24 MB |
627 | if (!dev->ops->submit_io) |
628 | return -ENODEV; | |
629 | ||
630 | /* Convert address space */ | |
631 | nvm_generic_to_addr_mode(dev, rqd); | |
632 | ||
633 | rqd->dev = tgt_dev; | |
634 | return dev->ops->submit_io(dev, rqd); | |
cd9e9808 MB |
635 | } |
636 | EXPORT_SYMBOL(nvm_submit_io); | |
637 | ||
10995c3d | 638 | int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, int flags) |
cd9e9808 | 639 | { |
10995c3d MB |
640 | struct nvm_dev *dev = tgt_dev->parent; |
641 | struct nvm_rq rqd; | |
642 | int ret; | |
643 | ||
644 | if (!dev->ops->erase_block) | |
645 | return 0; | |
646 | ||
61a561d8 | 647 | nvm_map_to_dev(tgt_dev, ppas); |
10995c3d MB |
648 | |
649 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
8e53624d | 650 | |
10995c3d MB |
651 | ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, 1, 1); |
652 | if (ret) | |
653 | return ret; | |
654 | ||
655 | nvm_generic_to_addr_mode(dev, &rqd); | |
656 | ||
657 | rqd.flags = flags; | |
658 | ||
659 | ret = dev->ops->erase_block(dev, &rqd); | |
660 | ||
661 | nvm_free_rqd_ppalist(dev, &rqd); | |
662 | ||
663 | return ret; | |
cd9e9808 MB |
664 | } |
665 | EXPORT_SYMBOL(nvm_erase_blk); | |
666 | ||
da2d7cb8 | 667 | int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb, |
959e911b JG |
668 | nvm_l2p_update_fn *update_l2p, void *priv) |
669 | { | |
da2d7cb8 JG |
670 | struct nvm_dev *dev = tgt_dev->parent; |
671 | ||
959e911b JG |
672 | if (!dev->ops->get_l2p_tbl) |
673 | return 0; | |
674 | ||
675 | return dev->ops->get_l2p_tbl(dev, slba, nlb, update_l2p, priv); | |
676 | } | |
677 | EXPORT_SYMBOL(nvm_get_l2p_tbl); | |
678 | ||
da2d7cb8 | 679 | int nvm_get_area(struct nvm_tgt_dev *tgt_dev, sector_t *lba, sector_t len) |
959e911b | 680 | { |
da2d7cb8 | 681 | struct nvm_dev *dev = tgt_dev->parent; |
ade69e24 MB |
682 | struct nvm_geo *geo = &dev->geo; |
683 | struct nvm_area *area, *prev, *next; | |
684 | sector_t begin = 0; | |
685 | sector_t max_sectors = (geo->sec_size * dev->total_secs) >> 9; | |
686 | ||
687 | if (len > max_sectors) | |
688 | return -EINVAL; | |
689 | ||
690 | area = kmalloc(sizeof(struct nvm_area), GFP_KERNEL); | |
691 | if (!area) | |
692 | return -ENOMEM; | |
693 | ||
694 | prev = NULL; | |
695 | ||
696 | spin_lock(&dev->lock); | |
697 | list_for_each_entry(next, &dev->area_list, list) { | |
698 | if (begin + len > next->begin) { | |
699 | begin = next->end; | |
700 | prev = next; | |
701 | continue; | |
702 | } | |
703 | break; | |
704 | } | |
705 | ||
706 | if ((begin + len) > max_sectors) { | |
707 | spin_unlock(&dev->lock); | |
708 | kfree(area); | |
709 | return -EINVAL; | |
710 | } | |
da2d7cb8 | 711 | |
ade69e24 MB |
712 | area->begin = *lba = begin; |
713 | area->end = begin + len; | |
714 | ||
715 | if (prev) /* insert into sorted order */ | |
716 | list_add(&area->list, &prev->list); | |
717 | else | |
718 | list_add(&area->list, &dev->area_list); | |
719 | spin_unlock(&dev->lock); | |
720 | ||
721 | return 0; | |
959e911b JG |
722 | } |
723 | EXPORT_SYMBOL(nvm_get_area); | |
724 | ||
ade69e24 | 725 | void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin) |
959e911b | 726 | { |
da2d7cb8 | 727 | struct nvm_dev *dev = tgt_dev->parent; |
ade69e24 | 728 | struct nvm_area *area; |
da2d7cb8 | 729 | |
ade69e24 MB |
730 | spin_lock(&dev->lock); |
731 | list_for_each_entry(area, &dev->area_list, list) { | |
732 | if (area->begin != begin) | |
733 | continue; | |
734 | ||
735 | list_del(&area->list); | |
736 | spin_unlock(&dev->lock); | |
737 | kfree(area); | |
738 | return; | |
739 | } | |
740 | spin_unlock(&dev->lock); | |
959e911b JG |
741 | } |
742 | EXPORT_SYMBOL(nvm_put_area); | |
743 | ||
069368e9 MB |
744 | void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd) |
745 | { | |
746 | int i; | |
747 | ||
6d5be959 JG |
748 | if (rqd->nr_ppas > 1) { |
749 | for (i = 0; i < rqd->nr_ppas; i++) | |
069368e9 MB |
750 | rqd->ppa_list[i] = dev_to_generic_addr(dev, |
751 | rqd->ppa_list[i]); | |
752 | } else { | |
753 | rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr); | |
754 | } | |
755 | } | |
756 | EXPORT_SYMBOL(nvm_addr_to_generic_mode); | |
757 | ||
758 | void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd) | |
759 | { | |
760 | int i; | |
761 | ||
6d5be959 JG |
762 | if (rqd->nr_ppas > 1) { |
763 | for (i = 0; i < rqd->nr_ppas; i++) | |
069368e9 MB |
764 | rqd->ppa_list[i] = generic_to_dev_addr(dev, |
765 | rqd->ppa_list[i]); | |
766 | } else { | |
767 | rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr); | |
768 | } | |
769 | } | |
770 | EXPORT_SYMBOL(nvm_generic_to_addr_mode); | |
771 | ||
abd805ec | 772 | int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd, |
8680f165 | 773 | const struct ppa_addr *ppas, int nr_ppas, int vblk) |
069368e9 | 774 | { |
8e79b5cb | 775 | struct nvm_geo *geo = &dev->geo; |
abd805ec | 776 | int i, plane_cnt, pl_idx; |
8680f165 | 777 | struct ppa_addr ppa; |
abd805ec | 778 | |
8e79b5cb | 779 | if ((!vblk || geo->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) { |
6d5be959 | 780 | rqd->nr_ppas = nr_ppas; |
abd805ec | 781 | rqd->ppa_addr = ppas[0]; |
069368e9 | 782 | |
069368e9 | 783 | return 0; |
abd805ec | 784 | } |
069368e9 | 785 | |
6d5be959 | 786 | rqd->nr_ppas = nr_ppas; |
abd805ec MB |
787 | rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); |
788 | if (!rqd->ppa_list) { | |
789 | pr_err("nvm: failed to allocate dma memory\n"); | |
790 | return -ENOMEM; | |
791 | } | |
792 | ||
5ebc7d9f MB |
793 | if (!vblk) { |
794 | for (i = 0; i < nr_ppas; i++) | |
795 | rqd->ppa_list[i] = ppas[i]; | |
796 | } else { | |
8e79b5cb | 797 | plane_cnt = geo->plane_mode; |
6d5be959 | 798 | rqd->nr_ppas *= plane_cnt; |
5ebc7d9f | 799 | |
556755e9 | 800 | for (i = 0; i < nr_ppas; i++) { |
5ebc7d9f | 801 | for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { |
8680f165 MB |
802 | ppa = ppas[i]; |
803 | ppa.g.pl = pl_idx; | |
804 | rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa; | |
5ebc7d9f | 805 | } |
069368e9 MB |
806 | } |
807 | } | |
808 | ||
abd805ec MB |
809 | return 0; |
810 | } | |
811 | EXPORT_SYMBOL(nvm_set_rqd_ppalist); | |
812 | ||
813 | void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd) | |
814 | { | |
815 | if (!rqd->ppa_list) | |
816 | return; | |
817 | ||
818 | nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list); | |
819 | } | |
820 | EXPORT_SYMBOL(nvm_free_rqd_ppalist); | |
821 | ||
91276162 MB |
822 | void nvm_end_io(struct nvm_rq *rqd, int error) |
823 | { | |
ade69e24 MB |
824 | struct nvm_tgt_dev *tgt_dev = rqd->dev; |
825 | struct nvm_tgt_instance *ins = rqd->ins; | |
826 | ||
827 | /* Convert address space */ | |
828 | if (tgt_dev) | |
829 | nvm_trans_rq(tgt_dev, rqd, TRANS_DEV_TO_TGT); | |
830 | ||
72d256ec | 831 | rqd->error = error; |
ade69e24 | 832 | ins->tt->end_io(rqd); |
91276162 MB |
833 | } |
834 | EXPORT_SYMBOL(nvm_end_io); | |
835 | ||
22e8c976 MB |
836 | /* |
837 | * folds a bad block list from its plane representation to its virtual | |
838 | * block representation. The fold is done in place and reduced size is | |
839 | * returned. | |
840 | * | |
841 | * If any of the planes status are bad or grown bad block, the virtual block | |
842 | * is marked bad. If not bad, the first plane state acts as the block state. | |
843 | */ | |
844 | int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) | |
845 | { | |
8e79b5cb | 846 | struct nvm_geo *geo = &dev->geo; |
22e8c976 MB |
847 | int blk, offset, pl, blktype; |
848 | ||
8e79b5cb | 849 | if (nr_blks != geo->blks_per_lun * geo->plane_mode) |
22e8c976 MB |
850 | return -EINVAL; |
851 | ||
8e79b5cb JG |
852 | for (blk = 0; blk < geo->blks_per_lun; blk++) { |
853 | offset = blk * geo->plane_mode; | |
22e8c976 MB |
854 | blktype = blks[offset]; |
855 | ||
856 | /* Bad blocks on any planes take precedence over other types */ | |
8e79b5cb | 857 | for (pl = 0; pl < geo->plane_mode; pl++) { |
22e8c976 MB |
858 | if (blks[offset + pl] & |
859 | (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { | |
860 | blktype = blks[offset + pl]; | |
861 | break; | |
862 | } | |
863 | } | |
864 | ||
865 | blks[blk] = blktype; | |
866 | } | |
867 | ||
8e79b5cb | 868 | return geo->blks_per_lun; |
22e8c976 MB |
869 | } |
870 | EXPORT_SYMBOL(nvm_bb_tbl_fold); | |
871 | ||
333ba053 JG |
872 | int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa, |
873 | u8 *blks) | |
874 | { | |
8f4fe008 MB |
875 | struct nvm_dev *dev = tgt_dev->parent; |
876 | ||
ade69e24 | 877 | ppa = nvm_trans_ppa(tgt_dev, ppa, TRANS_TGT_TO_DEV); |
8f4fe008 | 878 | ppa = generic_to_dev_addr(dev, ppa); |
333ba053 | 879 | |
8f4fe008 | 880 | return dev->ops->get_bb_tbl(dev, ppa, blks); |
333ba053 JG |
881 | } |
882 | EXPORT_SYMBOL(nvm_get_tgt_bb_tbl); | |
883 | ||
ca5927e7 MB |
884 | static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) |
885 | { | |
8e79b5cb | 886 | struct nvm_geo *geo = &dev->geo; |
ca5927e7 MB |
887 | int i; |
888 | ||
8e79b5cb | 889 | dev->lps_per_blk = geo->pgs_per_blk; |
ca5927e7 MB |
890 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); |
891 | if (!dev->lptbl) | |
892 | return -ENOMEM; | |
893 | ||
894 | /* Just a linear array */ | |
895 | for (i = 0; i < dev->lps_per_blk; i++) | |
896 | dev->lptbl[i] = i; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
901 | static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) | |
902 | { | |
903 | int i, p; | |
904 | struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc; | |
905 | ||
906 | if (!mlc->num_pairs) | |
907 | return 0; | |
908 | ||
909 | dev->lps_per_blk = mlc->num_pairs; | |
910 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
911 | if (!dev->lptbl) | |
912 | return -ENOMEM; | |
913 | ||
914 | /* The lower page table encoding consists of a list of bytes, where each | |
915 | * has a lower and an upper half. The first half byte maintains the | |
916 | * increment value and every value after is an offset added to the | |
12624af2 MB |
917 | * previous incrementation value |
918 | */ | |
ca5927e7 MB |
919 | dev->lptbl[0] = mlc->pairs[0] & 0xF; |
920 | for (i = 1; i < dev->lps_per_blk; i++) { | |
921 | p = mlc->pairs[i >> 1]; | |
922 | if (i & 0x1) /* upper */ | |
923 | dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4); | |
924 | else /* lower */ | |
925 | dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF); | |
926 | } | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
cd9e9808 MB |
931 | static int nvm_core_init(struct nvm_dev *dev) |
932 | { | |
933 | struct nvm_id *id = &dev->identity; | |
934 | struct nvm_id_group *grp = &id->groups[0]; | |
8e79b5cb | 935 | struct nvm_geo *geo = &dev->geo; |
7f7c5d03 | 936 | int ret; |
cd9e9808 | 937 | |
8e79b5cb JG |
938 | /* Whole device values */ |
939 | geo->nr_chnls = grp->num_ch; | |
940 | geo->luns_per_chnl = grp->num_lun; | |
941 | ||
942 | /* Generic device values */ | |
943 | geo->pgs_per_blk = grp->num_pg; | |
944 | geo->blks_per_lun = grp->num_blk; | |
945 | geo->nr_planes = grp->num_pln; | |
946 | geo->fpg_size = grp->fpg_sz; | |
947 | geo->pfpg_size = grp->fpg_sz * grp->num_pln; | |
948 | geo->sec_size = grp->csecs; | |
949 | geo->oob_size = grp->sos; | |
950 | geo->sec_per_pg = grp->fpg_sz / grp->csecs; | |
951 | geo->mccap = grp->mccap; | |
952 | memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); | |
953 | ||
954 | geo->plane_mode = NVM_PLANE_SINGLE; | |
955 | geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size; | |
cd9e9808 MB |
956 | |
957 | if (grp->mpos & 0x020202) | |
8e79b5cb | 958 | geo->plane_mode = NVM_PLANE_DOUBLE; |
cd9e9808 | 959 | if (grp->mpos & 0x040404) |
8e79b5cb | 960 | geo->plane_mode = NVM_PLANE_QUAD; |
cd9e9808 | 961 | |
7f7c5d03 MB |
962 | if (grp->mtype != 0) { |
963 | pr_err("nvm: memory type not supported\n"); | |
964 | return -EINVAL; | |
965 | } | |
966 | ||
cd9e9808 | 967 | /* calculated values */ |
8e79b5cb JG |
968 | geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes; |
969 | geo->sec_per_blk = geo->sec_per_pl * geo->pgs_per_blk; | |
970 | geo->sec_per_lun = geo->sec_per_blk * geo->blks_per_lun; | |
971 | geo->nr_luns = geo->luns_per_chnl * geo->nr_chnls; | |
cd9e9808 | 972 | |
8e79b5cb JG |
973 | dev->total_secs = geo->nr_luns * geo->sec_per_lun; |
974 | dev->lun_map = kcalloc(BITS_TO_LONGS(geo->nr_luns), | |
da1e2849 WT |
975 | sizeof(unsigned long), GFP_KERNEL); |
976 | if (!dev->lun_map) | |
977 | return -ENOMEM; | |
7f7c5d03 MB |
978 | |
979 | switch (grp->fmtype) { | |
980 | case NVM_ID_FMTYPE_SLC: | |
981 | if (nvm_init_slc_tbl(dev, grp)) { | |
982 | ret = -ENOMEM; | |
983 | goto err_fmtype; | |
984 | } | |
985 | break; | |
986 | case NVM_ID_FMTYPE_MLC: | |
987 | if (nvm_init_mlc_tbl(dev, grp)) { | |
988 | ret = -ENOMEM; | |
989 | goto err_fmtype; | |
990 | } | |
991 | break; | |
992 | default: | |
993 | pr_err("nvm: flash type not supported\n"); | |
994 | ret = -EINVAL; | |
995 | goto err_fmtype; | |
996 | } | |
997 | ||
ade69e24 MB |
998 | INIT_LIST_HEAD(&dev->area_list); |
999 | INIT_LIST_HEAD(&dev->targets); | |
e3eb3799 | 1000 | mutex_init(&dev->mlock); |
4c9dacb8 | 1001 | spin_lock_init(&dev->lock); |
cd9e9808 | 1002 | |
ade69e24 MB |
1003 | ret = nvm_register_map(dev); |
1004 | if (ret) | |
1005 | goto err_fmtype; | |
ac81bfa9 | 1006 | |
ade69e24 | 1007 | blk_queue_logical_block_size(dev->q, geo->sec_size); |
cd9e9808 | 1008 | return 0; |
7f7c5d03 MB |
1009 | err_fmtype: |
1010 | kfree(dev->lun_map); | |
1011 | return ret; | |
cd9e9808 MB |
1012 | } |
1013 | ||
40267efd | 1014 | void nvm_free(struct nvm_dev *dev) |
cd9e9808 MB |
1015 | { |
1016 | if (!dev) | |
1017 | return; | |
1018 | ||
40267efd SL |
1019 | if (dev->dma_pool) |
1020 | dev->ops->destroy_dma_pool(dev->dma_pool); | |
1021 | ||
ade69e24 | 1022 | kfree(dev->rmap); |
ca5927e7 | 1023 | kfree(dev->lptbl); |
7f7c5d03 | 1024 | kfree(dev->lun_map); |
40267efd | 1025 | kfree(dev); |
cd9e9808 MB |
1026 | } |
1027 | ||
1028 | static int nvm_init(struct nvm_dev *dev) | |
1029 | { | |
8e79b5cb | 1030 | struct nvm_geo *geo = &dev->geo; |
480fc0db | 1031 | int ret = -EINVAL; |
cd9e9808 | 1032 | |
16f26c3a | 1033 | if (dev->ops->identity(dev, &dev->identity)) { |
cd9e9808 | 1034 | pr_err("nvm: device could not be identified\n"); |
cd9e9808 MB |
1035 | goto err; |
1036 | } | |
1037 | ||
1038 | pr_debug("nvm: ver:%x nvm_vendor:%x groups:%u\n", | |
1039 | dev->identity.ver_id, dev->identity.vmnt, | |
1040 | dev->identity.cgrps); | |
1041 | ||
1042 | if (dev->identity.ver_id != 1) { | |
1043 | pr_err("nvm: device not supported by kernel."); | |
1044 | goto err; | |
1045 | } | |
1046 | ||
1047 | if (dev->identity.cgrps != 1) { | |
1048 | pr_err("nvm: only one group configuration supported."); | |
1049 | goto err; | |
1050 | } | |
1051 | ||
1052 | ret = nvm_core_init(dev); | |
1053 | if (ret) { | |
1054 | pr_err("nvm: could not initialize core structures.\n"); | |
1055 | goto err; | |
1056 | } | |
1057 | ||
cd9e9808 | 1058 | pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", |
8e79b5cb JG |
1059 | dev->name, geo->sec_per_pg, geo->nr_planes, |
1060 | geo->pgs_per_blk, geo->blks_per_lun, | |
1061 | geo->nr_luns, geo->nr_chnls); | |
cd9e9808 MB |
1062 | return 0; |
1063 | err: | |
cd9e9808 MB |
1064 | pr_err("nvm: failed to initialize nvm\n"); |
1065 | return ret; | |
1066 | } | |
1067 | ||
b0b4e09c | 1068 | struct nvm_dev *nvm_alloc_dev(int node) |
cd9e9808 | 1069 | { |
b0b4e09c | 1070 | return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node); |
cd9e9808 | 1071 | } |
b0b4e09c | 1072 | EXPORT_SYMBOL(nvm_alloc_dev); |
cd9e9808 | 1073 | |
b0b4e09c | 1074 | int nvm_register(struct nvm_dev *dev) |
cd9e9808 | 1075 | { |
cd9e9808 MB |
1076 | int ret; |
1077 | ||
ade69e24 MB |
1078 | if (!dev->q || !dev->ops) |
1079 | return -EINVAL; | |
cd9e9808 | 1080 | |
d160147b WT |
1081 | if (dev->ops->max_phys_sect > 256) { |
1082 | pr_info("nvm: max sectors supported is 256.\n"); | |
ade69e24 | 1083 | return -EINVAL; |
d160147b WT |
1084 | } |
1085 | ||
cd9e9808 | 1086 | if (dev->ops->max_phys_sect > 1) { |
75b85649 JG |
1087 | dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist"); |
1088 | if (!dev->dma_pool) { | |
1089 | pr_err("nvm: could not create dma pool\n"); | |
ade69e24 | 1090 | return -ENOMEM; |
cd9e9808 | 1091 | } |
cd9e9808 MB |
1092 | } |
1093 | ||
ade69e24 MB |
1094 | ret = nvm_init(dev); |
1095 | if (ret) | |
1096 | goto err_init; | |
b7692076 | 1097 | |
762796bc | 1098 | /* register device with a supported media manager */ |
edad2e66 MB |
1099 | down_write(&nvm_lock); |
1100 | list_add(&dev->devices, &nvm_devices); | |
1101 | up_write(&nvm_lock); | |
1102 | ||
cd9e9808 MB |
1103 | return 0; |
1104 | err_init: | |
ade69e24 | 1105 | dev->ops->destroy_dma_pool(dev->dma_pool); |
cd9e9808 MB |
1106 | return ret; |
1107 | } | |
1108 | EXPORT_SYMBOL(nvm_register); | |
1109 | ||
b0b4e09c | 1110 | void nvm_unregister(struct nvm_dev *dev) |
cd9e9808 | 1111 | { |
ade69e24 MB |
1112 | struct nvm_target *t, *tmp; |
1113 | ||
1114 | mutex_lock(&dev->mlock); | |
1115 | list_for_each_entry_safe(t, tmp, &dev->targets, list) { | |
1116 | if (t->dev->parent != dev) | |
1117 | continue; | |
1118 | __nvm_remove_target(t); | |
1119 | } | |
1120 | mutex_unlock(&dev->mlock); | |
1121 | ||
d0a712ce | 1122 | down_write(&nvm_lock); |
cd9e9808 MB |
1123 | list_del(&dev->devices); |
1124 | up_write(&nvm_lock); | |
c1480ad5 | 1125 | |
3dc87dd0 | 1126 | nvm_free(dev); |
cd9e9808 MB |
1127 | } |
1128 | EXPORT_SYMBOL(nvm_unregister); | |
1129 | ||
cd9e9808 MB |
1130 | static int __nvm_configure_create(struct nvm_ioctl_create *create) |
1131 | { | |
1132 | struct nvm_dev *dev; | |
1133 | struct nvm_ioctl_create_simple *s; | |
1134 | ||
d0a712ce | 1135 | down_write(&nvm_lock); |
cd9e9808 | 1136 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 1137 | up_write(&nvm_lock); |
b76eb20b | 1138 | |
cd9e9808 MB |
1139 | if (!dev) { |
1140 | pr_err("nvm: device not found\n"); | |
1141 | return -EINVAL; | |
1142 | } | |
1143 | ||
1144 | if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) { | |
1145 | pr_err("nvm: config type not valid\n"); | |
1146 | return -EINVAL; | |
1147 | } | |
1148 | s = &create->conf.s; | |
1149 | ||
8e79b5cb | 1150 | if (s->lun_begin > s->lun_end || s->lun_end > dev->geo.nr_luns) { |
cd9e9808 | 1151 | pr_err("nvm: lun out of bound (%u:%u > %u)\n", |
8e79b5cb | 1152 | s->lun_begin, s->lun_end, dev->geo.nr_luns); |
cd9e9808 MB |
1153 | return -EINVAL; |
1154 | } | |
1155 | ||
ade69e24 | 1156 | return nvm_create_tgt(dev, create); |
cd9e9808 MB |
1157 | } |
1158 | ||
cd9e9808 MB |
1159 | static long nvm_ioctl_info(struct file *file, void __user *arg) |
1160 | { | |
1161 | struct nvm_ioctl_info *info; | |
1162 | struct nvm_tgt_type *tt; | |
1163 | int tgt_iter = 0; | |
1164 | ||
1165 | if (!capable(CAP_SYS_ADMIN)) | |
1166 | return -EPERM; | |
1167 | ||
1168 | info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); | |
1169 | if (IS_ERR(info)) | |
1170 | return -EFAULT; | |
1171 | ||
1172 | info->version[0] = NVM_VERSION_MAJOR; | |
1173 | info->version[1] = NVM_VERSION_MINOR; | |
1174 | info->version[2] = NVM_VERSION_PATCH; | |
1175 | ||
1176 | down_write(&nvm_lock); | |
6063fe39 | 1177 | list_for_each_entry(tt, &nvm_tgt_types, list) { |
cd9e9808 MB |
1178 | struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; |
1179 | ||
1180 | tgt->version[0] = tt->version[0]; | |
1181 | tgt->version[1] = tt->version[1]; | |
1182 | tgt->version[2] = tt->version[2]; | |
1183 | strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); | |
1184 | ||
1185 | tgt_iter++; | |
1186 | } | |
1187 | ||
1188 | info->tgtsize = tgt_iter; | |
1189 | up_write(&nvm_lock); | |
1190 | ||
76e25081 SM |
1191 | if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { |
1192 | kfree(info); | |
cd9e9808 | 1193 | return -EFAULT; |
76e25081 | 1194 | } |
cd9e9808 MB |
1195 | |
1196 | kfree(info); | |
1197 | return 0; | |
1198 | } | |
1199 | ||
1200 | static long nvm_ioctl_get_devices(struct file *file, void __user *arg) | |
1201 | { | |
1202 | struct nvm_ioctl_get_devices *devices; | |
1203 | struct nvm_dev *dev; | |
1204 | int i = 0; | |
1205 | ||
1206 | if (!capable(CAP_SYS_ADMIN)) | |
1207 | return -EPERM; | |
1208 | ||
1209 | devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); | |
1210 | if (!devices) | |
1211 | return -ENOMEM; | |
1212 | ||
1213 | down_write(&nvm_lock); | |
1214 | list_for_each_entry(dev, &nvm_devices, devices) { | |
1215 | struct nvm_ioctl_device_info *info = &devices->info[i]; | |
1216 | ||
1217 | sprintf(info->devname, "%s", dev->name); | |
cd9e9808 | 1218 | |
ade69e24 MB |
1219 | /* kept for compatibility */ |
1220 | info->bmversion[0] = 1; | |
1221 | info->bmversion[1] = 0; | |
1222 | info->bmversion[2] = 0; | |
1223 | sprintf(info->bmname, "%s", "gennvm"); | |
cd9e9808 | 1224 | i++; |
ade69e24 | 1225 | |
cd9e9808 MB |
1226 | if (i > 31) { |
1227 | pr_err("nvm: max 31 devices can be reported.\n"); | |
1228 | break; | |
1229 | } | |
1230 | } | |
1231 | up_write(&nvm_lock); | |
1232 | ||
1233 | devices->nr_devices = i; | |
1234 | ||
76e25081 SM |
1235 | if (copy_to_user(arg, devices, |
1236 | sizeof(struct nvm_ioctl_get_devices))) { | |
1237 | kfree(devices); | |
cd9e9808 | 1238 | return -EFAULT; |
76e25081 | 1239 | } |
cd9e9808 MB |
1240 | |
1241 | kfree(devices); | |
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
1246 | { | |
1247 | struct nvm_ioctl_create create; | |
1248 | ||
1249 | if (!capable(CAP_SYS_ADMIN)) | |
1250 | return -EPERM; | |
1251 | ||
1252 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) | |
1253 | return -EFAULT; | |
1254 | ||
1255 | create.dev[DISK_NAME_LEN - 1] = '\0'; | |
1256 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
1257 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1258 | ||
1259 | if (create.flags != 0) { | |
1260 | pr_err("nvm: no flags supported\n"); | |
1261 | return -EINVAL; | |
1262 | } | |
1263 | ||
1264 | return __nvm_configure_create(&create); | |
1265 | } | |
1266 | ||
1267 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
1268 | { | |
1269 | struct nvm_ioctl_remove remove; | |
b76eb20b MB |
1270 | struct nvm_dev *dev; |
1271 | int ret = 0; | |
cd9e9808 MB |
1272 | |
1273 | if (!capable(CAP_SYS_ADMIN)) | |
1274 | return -EPERM; | |
1275 | ||
1276 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) | |
1277 | return -EFAULT; | |
1278 | ||
1279 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1280 | ||
1281 | if (remove.flags != 0) { | |
1282 | pr_err("nvm: no flags supported\n"); | |
1283 | return -EINVAL; | |
1284 | } | |
1285 | ||
b76eb20b | 1286 | list_for_each_entry(dev, &nvm_devices, devices) { |
ade69e24 | 1287 | ret = nvm_remove_tgt(dev, &remove); |
b76eb20b MB |
1288 | if (!ret) |
1289 | break; | |
1290 | } | |
1291 | ||
1292 | return ret; | |
cd9e9808 MB |
1293 | } |
1294 | ||
ade69e24 | 1295 | /* kept for compatibility reasons */ |
55696154 MB |
1296 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) |
1297 | { | |
1298 | struct nvm_ioctl_dev_init init; | |
1299 | ||
1300 | if (!capable(CAP_SYS_ADMIN)) | |
1301 | return -EPERM; | |
1302 | ||
1303 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) | |
1304 | return -EFAULT; | |
1305 | ||
1306 | if (init.flags != 0) { | |
1307 | pr_err("nvm: no flags supported\n"); | |
1308 | return -EINVAL; | |
1309 | } | |
1310 | ||
ade69e24 | 1311 | return 0; |
55696154 MB |
1312 | } |
1313 | ||
ade69e24 | 1314 | /* Kept for compatibility reasons */ |
8b4970c4 MB |
1315 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
1316 | { | |
1317 | struct nvm_ioctl_dev_factory fact; | |
8b4970c4 MB |
1318 | |
1319 | if (!capable(CAP_SYS_ADMIN)) | |
1320 | return -EPERM; | |
1321 | ||
1322 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) | |
1323 | return -EFAULT; | |
1324 | ||
1325 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1326 | ||
1327 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1328 | return -EINVAL; | |
1329 | ||
bf643185 | 1330 | return 0; |
8b4970c4 MB |
1331 | } |
1332 | ||
cd9e9808 MB |
1333 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1334 | { | |
1335 | void __user *argp = (void __user *)arg; | |
1336 | ||
1337 | switch (cmd) { | |
1338 | case NVM_INFO: | |
1339 | return nvm_ioctl_info(file, argp); | |
1340 | case NVM_GET_DEVICES: | |
1341 | return nvm_ioctl_get_devices(file, argp); | |
1342 | case NVM_DEV_CREATE: | |
1343 | return nvm_ioctl_dev_create(file, argp); | |
1344 | case NVM_DEV_REMOVE: | |
1345 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1346 | case NVM_DEV_INIT: |
1347 | return nvm_ioctl_dev_init(file, argp); | |
8b4970c4 MB |
1348 | case NVM_DEV_FACTORY: |
1349 | return nvm_ioctl_dev_factory(file, argp); | |
cd9e9808 MB |
1350 | } |
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | static const struct file_operations _ctl_fops = { | |
1355 | .open = nonseekable_open, | |
1356 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1357 | .owner = THIS_MODULE, | |
1358 | .llseek = noop_llseek, | |
1359 | }; | |
1360 | ||
1361 | static struct miscdevice _nvm_misc = { | |
1362 | .minor = MISC_DYNAMIC_MINOR, | |
1363 | .name = "lightnvm", | |
1364 | .nodename = "lightnvm/control", | |
1365 | .fops = &_ctl_fops, | |
1366 | }; | |
389b2a1c | 1367 | builtin_misc_device(_nvm_misc); |