]>
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: | |
507f7d68 | 77 | while (--i >= lun_begin) |
ade69e24 MB |
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 | ||
edee1bdd | 92 | static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev, int clear) |
ade69e24 MB |
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 | ||
edee1bdd JG |
103 | if (clear) { |
104 | for (j = 0; j < ch_map->nr_luns; j++) { | |
105 | int lun = j + lun_offs[j]; | |
106 | int lunid = (ch * dev->geo.luns_per_chnl) + lun; | |
ade69e24 | 107 | |
edee1bdd JG |
108 | WARN_ON(!test_and_clear_bit(lunid, |
109 | dev->lun_map)); | |
110 | } | |
ade69e24 MB |
111 | } |
112 | ||
113 | kfree(ch_map->lun_offs); | |
114 | } | |
115 | ||
116 | kfree(dev_map->chnls); | |
117 | kfree(dev_map); | |
118 | ||
119 | kfree(tgt_dev->luns); | |
120 | kfree(tgt_dev); | |
121 | } | |
122 | ||
123 | static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev, | |
124 | int lun_begin, int lun_end) | |
125 | { | |
126 | struct nvm_tgt_dev *tgt_dev = NULL; | |
127 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
128 | struct nvm_dev_map *dev_map; | |
129 | struct ppa_addr *luns; | |
130 | int nr_luns = lun_end - lun_begin + 1; | |
131 | int luns_left = nr_luns; | |
132 | int nr_chnls = nr_luns / dev->geo.luns_per_chnl; | |
133 | int nr_chnls_mod = nr_luns % dev->geo.luns_per_chnl; | |
134 | int bch = lun_begin / dev->geo.luns_per_chnl; | |
135 | int blun = lun_begin % dev->geo.luns_per_chnl; | |
136 | int lunid = 0; | |
137 | int lun_balanced = 1; | |
138 | int prev_nr_luns; | |
139 | int i, j; | |
140 | ||
141 | nr_chnls = nr_luns / dev->geo.luns_per_chnl; | |
142 | nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1; | |
143 | ||
144 | dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
145 | if (!dev_map) | |
146 | goto err_dev; | |
147 | ||
148 | dev_map->chnls = kcalloc(nr_chnls, sizeof(struct nvm_ch_map), | |
149 | GFP_KERNEL); | |
150 | if (!dev_map->chnls) | |
151 | goto err_chnls; | |
152 | ||
153 | luns = kcalloc(nr_luns, sizeof(struct ppa_addr), GFP_KERNEL); | |
154 | if (!luns) | |
155 | goto err_luns; | |
156 | ||
157 | prev_nr_luns = (luns_left > dev->geo.luns_per_chnl) ? | |
158 | dev->geo.luns_per_chnl : luns_left; | |
159 | for (i = 0; i < nr_chnls; i++) { | |
160 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch]; | |
161 | int *lun_roffs = ch_rmap->lun_offs; | |
162 | struct nvm_ch_map *ch_map = &dev_map->chnls[i]; | |
163 | int *lun_offs; | |
164 | int luns_in_chnl = (luns_left > dev->geo.luns_per_chnl) ? | |
165 | dev->geo.luns_per_chnl : luns_left; | |
166 | ||
167 | if (lun_balanced && prev_nr_luns != luns_in_chnl) | |
168 | lun_balanced = 0; | |
169 | ||
170 | ch_map->ch_off = ch_rmap->ch_off = bch; | |
171 | ch_map->nr_luns = luns_in_chnl; | |
172 | ||
173 | lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
174 | if (!lun_offs) | |
175 | goto err_ch; | |
176 | ||
177 | for (j = 0; j < luns_in_chnl; j++) { | |
178 | luns[lunid].ppa = 0; | |
179 | luns[lunid].g.ch = i; | |
180 | luns[lunid++].g.lun = j; | |
181 | ||
182 | lun_offs[j] = blun; | |
183 | lun_roffs[j + blun] = blun; | |
184 | } | |
185 | ||
186 | ch_map->lun_offs = lun_offs; | |
187 | ||
188 | /* when starting a new channel, lun offset is reset */ | |
189 | blun = 0; | |
190 | luns_left -= luns_in_chnl; | |
191 | } | |
192 | ||
193 | dev_map->nr_chnls = nr_chnls; | |
194 | ||
195 | tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL); | |
196 | if (!tgt_dev) | |
197 | goto err_ch; | |
198 | ||
199 | memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo)); | |
200 | /* Target device only owns a portion of the physical device */ | |
201 | tgt_dev->geo.nr_chnls = nr_chnls; | |
202 | tgt_dev->geo.nr_luns = nr_luns; | |
203 | tgt_dev->geo.luns_per_chnl = (lun_balanced) ? prev_nr_luns : -1; | |
204 | tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun; | |
205 | tgt_dev->q = dev->q; | |
206 | tgt_dev->map = dev_map; | |
207 | tgt_dev->luns = luns; | |
208 | memcpy(&tgt_dev->identity, &dev->identity, sizeof(struct nvm_id)); | |
209 | ||
210 | tgt_dev->parent = dev; | |
211 | ||
212 | return tgt_dev; | |
213 | err_ch: | |
507f7d68 | 214 | while (--i >= 0) |
ade69e24 MB |
215 | kfree(dev_map->chnls[i].lun_offs); |
216 | kfree(luns); | |
217 | err_luns: | |
218 | kfree(dev_map->chnls); | |
219 | err_chnls: | |
220 | kfree(dev_map); | |
221 | err_dev: | |
222 | return tgt_dev; | |
223 | } | |
224 | ||
225 | static const struct block_device_operations nvm_fops = { | |
226 | .owner = THIS_MODULE, | |
227 | }; | |
228 | ||
229 | static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) | |
230 | { | |
231 | struct nvm_ioctl_create_simple *s = &create->conf.s; | |
232 | struct request_queue *tqueue; | |
233 | struct gendisk *tdisk; | |
234 | struct nvm_tgt_type *tt; | |
235 | struct nvm_target *t; | |
236 | struct nvm_tgt_dev *tgt_dev; | |
237 | void *targetdata; | |
8d77bb82 | 238 | int ret; |
ade69e24 MB |
239 | |
240 | tt = nvm_find_target_type(create->tgttype, 1); | |
241 | if (!tt) { | |
242 | pr_err("nvm: target type %s not found\n", create->tgttype); | |
243 | return -EINVAL; | |
244 | } | |
245 | ||
246 | mutex_lock(&dev->mlock); | |
247 | t = nvm_find_target(dev, create->tgtname); | |
248 | if (t) { | |
249 | pr_err("nvm: target name already exists.\n"); | |
250 | mutex_unlock(&dev->mlock); | |
251 | return -EINVAL; | |
252 | } | |
253 | mutex_unlock(&dev->mlock); | |
254 | ||
255 | if (nvm_reserve_luns(dev, s->lun_begin, s->lun_end)) | |
256 | return -ENOMEM; | |
257 | ||
258 | t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); | |
8d77bb82 RP |
259 | if (!t) { |
260 | ret = -ENOMEM; | |
ade69e24 | 261 | goto err_reserve; |
8d77bb82 | 262 | } |
ade69e24 MB |
263 | |
264 | tgt_dev = nvm_create_tgt_dev(dev, s->lun_begin, s->lun_end); | |
265 | if (!tgt_dev) { | |
266 | pr_err("nvm: could not create target device\n"); | |
8d77bb82 | 267 | ret = -ENOMEM; |
ade69e24 MB |
268 | goto err_t; |
269 | } | |
270 | ||
7d1ef2f4 | 271 | tdisk = alloc_disk(0); |
8d77bb82 RP |
272 | if (!tdisk) { |
273 | ret = -ENOMEM; | |
7d1ef2f4 | 274 | goto err_dev; |
8d77bb82 | 275 | } |
7d1ef2f4 | 276 | |
ade69e24 | 277 | tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node); |
8d77bb82 RP |
278 | if (!tqueue) { |
279 | ret = -ENOMEM; | |
7d1ef2f4 | 280 | goto err_disk; |
8d77bb82 | 281 | } |
ade69e24 MB |
282 | blk_queue_make_request(tqueue, tt->make_rq); |
283 | ||
6eb08245 | 284 | strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name)); |
ade69e24 MB |
285 | tdisk->flags = GENHD_FL_EXT_DEVT; |
286 | tdisk->major = 0; | |
287 | tdisk->first_minor = 0; | |
288 | tdisk->fops = &nvm_fops; | |
289 | tdisk->queue = tqueue; | |
290 | ||
4af3f75d | 291 | targetdata = tt->init(tgt_dev, tdisk, create->flags); |
8d77bb82 RP |
292 | if (IS_ERR(targetdata)) { |
293 | ret = PTR_ERR(targetdata); | |
ade69e24 | 294 | goto err_init; |
8d77bb82 | 295 | } |
ade69e24 MB |
296 | |
297 | tdisk->private_data = targetdata; | |
298 | tqueue->queuedata = targetdata; | |
299 | ||
300 | blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect); | |
301 | ||
302 | set_capacity(tdisk, tt->capacity(targetdata)); | |
303 | add_disk(tdisk); | |
304 | ||
8d77bb82 RP |
305 | if (tt->sysfs_init && tt->sysfs_init(tdisk)) { |
306 | ret = -ENOMEM; | |
9a69b0ed | 307 | goto err_sysfs; |
8d77bb82 | 308 | } |
9a69b0ed | 309 | |
ade69e24 MB |
310 | t->type = tt; |
311 | t->disk = tdisk; | |
312 | t->dev = tgt_dev; | |
313 | ||
314 | mutex_lock(&dev->mlock); | |
315 | list_add_tail(&t->list, &dev->targets); | |
316 | mutex_unlock(&dev->mlock); | |
317 | ||
318 | return 0; | |
9a69b0ed JG |
319 | err_sysfs: |
320 | if (tt->exit) | |
321 | tt->exit(targetdata); | |
ade69e24 | 322 | err_init: |
ade69e24 | 323 | blk_cleanup_queue(tqueue); |
75ba4ada | 324 | tdisk->queue = NULL; |
7d1ef2f4 JG |
325 | err_disk: |
326 | put_disk(tdisk); | |
ade69e24 | 327 | err_dev: |
edee1bdd | 328 | nvm_remove_tgt_dev(tgt_dev, 0); |
ade69e24 MB |
329 | err_t: |
330 | kfree(t); | |
331 | err_reserve: | |
332 | nvm_release_luns_err(dev, s->lun_begin, s->lun_end); | |
8d77bb82 | 333 | return ret; |
ade69e24 MB |
334 | } |
335 | ||
336 | static void __nvm_remove_target(struct nvm_target *t) | |
337 | { | |
338 | struct nvm_tgt_type *tt = t->type; | |
339 | struct gendisk *tdisk = t->disk; | |
340 | struct request_queue *q = tdisk->queue; | |
341 | ||
342 | del_gendisk(tdisk); | |
343 | blk_cleanup_queue(q); | |
344 | ||
9a69b0ed JG |
345 | if (tt->sysfs_exit) |
346 | tt->sysfs_exit(tdisk); | |
347 | ||
ade69e24 MB |
348 | if (tt->exit) |
349 | tt->exit(tdisk->private_data); | |
350 | ||
edee1bdd | 351 | nvm_remove_tgt_dev(t->dev, 1); |
ade69e24 MB |
352 | put_disk(tdisk); |
353 | ||
354 | list_del(&t->list); | |
355 | kfree(t); | |
356 | } | |
357 | ||
358 | /** | |
359 | * nvm_remove_tgt - Removes a target from the media manager | |
360 | * @dev: device | |
361 | * @remove: ioctl structure with target name to remove. | |
362 | * | |
363 | * Returns: | |
364 | * 0: on success | |
365 | * 1: on not found | |
366 | * <0: on error | |
367 | */ | |
368 | static int nvm_remove_tgt(struct nvm_dev *dev, struct nvm_ioctl_remove *remove) | |
369 | { | |
370 | struct nvm_target *t; | |
371 | ||
372 | mutex_lock(&dev->mlock); | |
373 | t = nvm_find_target(dev, remove->tgtname); | |
374 | if (!t) { | |
375 | mutex_unlock(&dev->mlock); | |
376 | return 1; | |
377 | } | |
378 | __nvm_remove_target(t); | |
379 | mutex_unlock(&dev->mlock); | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | static int nvm_register_map(struct nvm_dev *dev) | |
385 | { | |
386 | struct nvm_dev_map *rmap; | |
387 | int i, j; | |
388 | ||
389 | rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
390 | if (!rmap) | |
391 | goto err_rmap; | |
392 | ||
393 | rmap->chnls = kcalloc(dev->geo.nr_chnls, sizeof(struct nvm_ch_map), | |
394 | GFP_KERNEL); | |
395 | if (!rmap->chnls) | |
396 | goto err_chnls; | |
397 | ||
398 | for (i = 0; i < dev->geo.nr_chnls; i++) { | |
399 | struct nvm_ch_map *ch_rmap; | |
400 | int *lun_roffs; | |
401 | int luns_in_chnl = dev->geo.luns_per_chnl; | |
402 | ||
403 | ch_rmap = &rmap->chnls[i]; | |
404 | ||
405 | ch_rmap->ch_off = -1; | |
406 | ch_rmap->nr_luns = luns_in_chnl; | |
407 | ||
408 | lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
409 | if (!lun_roffs) | |
410 | goto err_ch; | |
411 | ||
412 | for (j = 0; j < luns_in_chnl; j++) | |
413 | lun_roffs[j] = -1; | |
414 | ||
415 | ch_rmap->lun_offs = lun_roffs; | |
416 | } | |
417 | ||
418 | dev->rmap = rmap; | |
419 | ||
420 | return 0; | |
421 | err_ch: | |
422 | while (--i >= 0) | |
423 | kfree(rmap->chnls[i].lun_offs); | |
424 | err_chnls: | |
425 | kfree(rmap); | |
426 | err_rmap: | |
427 | return -ENOMEM; | |
428 | } | |
429 | ||
7a3de2b3 JG |
430 | static void nvm_unregister_map(struct nvm_dev *dev) |
431 | { | |
432 | struct nvm_dev_map *rmap = dev->rmap; | |
433 | int i; | |
434 | ||
435 | for (i = 0; i < dev->geo.nr_chnls; i++) | |
436 | kfree(rmap->chnls[i].lun_offs); | |
437 | ||
438 | kfree(rmap->chnls); | |
439 | kfree(rmap); | |
440 | } | |
441 | ||
61a561d8 | 442 | static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
443 | { |
444 | struct nvm_dev_map *dev_map = tgt_dev->map; | |
445 | struct nvm_ch_map *ch_map = &dev_map->chnls[p->g.ch]; | |
446 | int lun_off = ch_map->lun_offs[p->g.lun]; | |
ade69e24 MB |
447 | |
448 | p->g.ch += ch_map->ch_off; | |
449 | p->g.lun += lun_off; | |
ade69e24 MB |
450 | } |
451 | ||
61a561d8 | 452 | static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
453 | { |
454 | struct nvm_dev *dev = tgt_dev->parent; | |
455 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
456 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch]; | |
457 | int lun_roff = ch_rmap->lun_offs[p->g.lun]; | |
458 | ||
459 | p->g.ch -= ch_rmap->ch_off; | |
460 | p->g.lun -= lun_roff; | |
ade69e24 MB |
461 | } |
462 | ||
dab8ee9e MB |
463 | static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, |
464 | struct ppa_addr *ppa_list, int nr_ppas) | |
ade69e24 MB |
465 | { |
466 | int i; | |
ade69e24 | 467 | |
dab8ee9e MB |
468 | for (i = 0; i < nr_ppas; i++) { |
469 | nvm_map_to_dev(tgt_dev, &ppa_list[i]); | |
470 | ppa_list[i] = generic_to_dev_addr(tgt_dev, ppa_list[i]); | |
ade69e24 | 471 | } |
dab8ee9e | 472 | } |
ade69e24 | 473 | |
dab8ee9e MB |
474 | static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, |
475 | struct ppa_addr *ppa_list, int nr_ppas) | |
476 | { | |
477 | int i; | |
478 | ||
479 | for (i = 0; i < nr_ppas; i++) { | |
480 | ppa_list[i] = dev_to_generic_addr(tgt_dev, ppa_list[i]); | |
481 | nvm_map_to_tgt(tgt_dev, &ppa_list[i]); | |
ade69e24 | 482 | } |
ade69e24 MB |
483 | } |
484 | ||
dab8ee9e | 485 | static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
ade69e24 | 486 | { |
dab8ee9e MB |
487 | if (rqd->nr_ppas == 1) { |
488 | nvm_ppa_tgt_to_dev(tgt_dev, &rqd->ppa_addr, 1); | |
489 | return; | |
490 | } | |
ade69e24 | 491 | |
dab8ee9e MB |
492 | nvm_ppa_tgt_to_dev(tgt_dev, rqd->ppa_list, rqd->nr_ppas); |
493 | } | |
494 | ||
495 | static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) | |
496 | { | |
497 | if (rqd->nr_ppas == 1) { | |
498 | nvm_ppa_dev_to_tgt(tgt_dev, &rqd->ppa_addr, 1); | |
499 | return; | |
500 | } | |
ade69e24 | 501 | |
dab8ee9e | 502 | nvm_ppa_dev_to_tgt(tgt_dev, rqd->ppa_list, rqd->nr_ppas); |
ade69e24 MB |
503 | } |
504 | ||
505 | void nvm_part_to_tgt(struct nvm_dev *dev, sector_t *entries, | |
506 | int len) | |
507 | { | |
508 | struct nvm_geo *geo = &dev->geo; | |
509 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
510 | u64 i; | |
511 | ||
512 | for (i = 0; i < len; i++) { | |
513 | struct nvm_ch_map *ch_rmap; | |
514 | int *lun_roffs; | |
515 | struct ppa_addr gaddr; | |
516 | u64 pba = le64_to_cpu(entries[i]); | |
ade69e24 MB |
517 | u64 diff; |
518 | ||
519 | if (!pba) | |
520 | continue; | |
521 | ||
522 | gaddr = linear_to_generic_addr(geo, pba); | |
523 | ch_rmap = &dev_rmap->chnls[gaddr.g.ch]; | |
524 | lun_roffs = ch_rmap->lun_offs; | |
525 | ||
ade69e24 MB |
526 | diff = ((ch_rmap->ch_off * geo->luns_per_chnl) + |
527 | (lun_roffs[gaddr.g.lun])) * geo->sec_per_lun; | |
528 | ||
529 | entries[i] -= cpu_to_le64(diff); | |
530 | } | |
531 | } | |
532 | EXPORT_SYMBOL(nvm_part_to_tgt); | |
533 | ||
b76eb20b | 534 | struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock) |
6f8645cb | 535 | { |
b76eb20b | 536 | struct nvm_tgt_type *tmp, *tt = NULL; |
6f8645cb | 537 | |
b76eb20b | 538 | if (lock) |
5cd90785 | 539 | down_write(&nvm_tgtt_lock); |
6f8645cb | 540 | |
b76eb20b MB |
541 | list_for_each_entry(tmp, &nvm_tgt_types, list) |
542 | if (!strcmp(name, tmp->name)) { | |
543 | tt = tmp; | |
544 | break; | |
545 | } | |
cd9e9808 | 546 | |
b76eb20b | 547 | if (lock) |
5cd90785 | 548 | up_write(&nvm_tgtt_lock); |
b76eb20b | 549 | return tt; |
cd9e9808 | 550 | } |
b76eb20b | 551 | EXPORT_SYMBOL(nvm_find_target_type); |
cd9e9808 | 552 | |
6063fe39 | 553 | int nvm_register_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
554 | { |
555 | int ret = 0; | |
556 | ||
5cd90785 | 557 | down_write(&nvm_tgtt_lock); |
b76eb20b | 558 | if (nvm_find_target_type(tt->name, 0)) |
cd9e9808 MB |
559 | ret = -EEXIST; |
560 | else | |
6063fe39 | 561 | list_add(&tt->list, &nvm_tgt_types); |
5cd90785 | 562 | up_write(&nvm_tgtt_lock); |
cd9e9808 MB |
563 | |
564 | return ret; | |
565 | } | |
6063fe39 | 566 | EXPORT_SYMBOL(nvm_register_tgt_type); |
cd9e9808 | 567 | |
6063fe39 | 568 | void nvm_unregister_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
569 | { |
570 | if (!tt) | |
571 | return; | |
572 | ||
573 | down_write(&nvm_lock); | |
574 | list_del(&tt->list); | |
575 | up_write(&nvm_lock); | |
576 | } | |
6063fe39 | 577 | EXPORT_SYMBOL(nvm_unregister_tgt_type); |
cd9e9808 MB |
578 | |
579 | void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, | |
580 | dma_addr_t *dma_handler) | |
581 | { | |
75b85649 | 582 | return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags, |
cd9e9808 MB |
583 | dma_handler); |
584 | } | |
585 | EXPORT_SYMBOL(nvm_dev_dma_alloc); | |
586 | ||
da2d7cb8 | 587 | void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler) |
cd9e9808 | 588 | { |
75b85649 | 589 | dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler); |
cd9e9808 MB |
590 | } |
591 | EXPORT_SYMBOL(nvm_dev_dma_free); | |
592 | ||
cd9e9808 MB |
593 | static struct nvm_dev *nvm_find_nvm_dev(const char *name) |
594 | { | |
595 | struct nvm_dev *dev; | |
596 | ||
597 | list_for_each_entry(dev, &nvm_devices, devices) | |
598 | if (!strcmp(name, dev->name)) | |
599 | return dev; | |
600 | ||
601 | return NULL; | |
602 | } | |
603 | ||
333ba053 JG |
604 | int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, |
605 | int nr_ppas, int type) | |
606 | { | |
607 | struct nvm_dev *dev = tgt_dev->parent; | |
608 | struct nvm_rq rqd; | |
609 | int ret; | |
610 | ||
611 | if (nr_ppas > dev->ops->max_phys_sect) { | |
612 | pr_err("nvm: unable to update all blocks atomically\n"); | |
613 | return -EINVAL; | |
614 | } | |
615 | ||
616 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
617 | ||
17912c49 | 618 | nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1); |
dab8ee9e | 619 | nvm_rq_tgt_to_dev(tgt_dev, &rqd); |
333ba053 JG |
620 | |
621 | ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); | |
17912c49 | 622 | nvm_free_rqd_ppalist(tgt_dev, &rqd); |
333ba053 | 623 | if (ret) { |
ade69e24 | 624 | pr_err("nvm: failed bb mark\n"); |
333ba053 JG |
625 | return -EINVAL; |
626 | } | |
627 | ||
628 | return 0; | |
629 | } | |
630 | EXPORT_SYMBOL(nvm_set_tgt_bb_tbl); | |
631 | ||
a279006a JG |
632 | int nvm_max_phys_sects(struct nvm_tgt_dev *tgt_dev) |
633 | { | |
634 | struct nvm_dev *dev = tgt_dev->parent; | |
635 | ||
636 | return dev->ops->max_phys_sect; | |
637 | } | |
638 | EXPORT_SYMBOL(nvm_max_phys_sects); | |
639 | ||
8e53624d | 640 | int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
cd9e9808 | 641 | { |
8e53624d JG |
642 | struct nvm_dev *dev = tgt_dev->parent; |
643 | ||
ade69e24 MB |
644 | if (!dev->ops->submit_io) |
645 | return -ENODEV; | |
646 | ||
dab8ee9e | 647 | nvm_rq_tgt_to_dev(tgt_dev, rqd); |
ade69e24 MB |
648 | |
649 | rqd->dev = tgt_dev; | |
650 | return dev->ops->submit_io(dev, rqd); | |
cd9e9808 MB |
651 | } |
652 | EXPORT_SYMBOL(nvm_submit_io); | |
653 | ||
17912c49 | 654 | static void nvm_end_io_sync(struct nvm_rq *rqd) |
cd9e9808 | 655 | { |
17912c49 | 656 | struct completion *waiting = rqd->private; |
10995c3d | 657 | |
17912c49 JG |
658 | complete(waiting); |
659 | } | |
10995c3d | 660 | |
17912c49 JG |
661 | int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, |
662 | int nr_ppas) | |
663 | { | |
664 | struct nvm_geo *geo = &tgt_dev->geo; | |
665 | struct nvm_rq rqd; | |
666 | int ret; | |
667 | DECLARE_COMPLETION_ONSTACK(wait); | |
10995c3d MB |
668 | |
669 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
8e53624d | 670 | |
17912c49 JG |
671 | rqd.opcode = NVM_OP_ERASE; |
672 | rqd.end_io = nvm_end_io_sync; | |
673 | rqd.private = &wait; | |
674 | rqd.flags = geo->plane_mode >> 1; | |
675 | ||
676 | ret = nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1); | |
10995c3d MB |
677 | if (ret) |
678 | return ret; | |
679 | ||
17912c49 JG |
680 | ret = nvm_submit_io(tgt_dev, &rqd); |
681 | if (ret) { | |
682 | pr_err("rrpr: erase I/O submission failed: %d\n", ret); | |
683 | goto free_ppa_list; | |
684 | } | |
685 | wait_for_completion_io(&wait); | |
10995c3d | 686 | |
17912c49 JG |
687 | free_ppa_list: |
688 | nvm_free_rqd_ppalist(tgt_dev, &rqd); | |
10995c3d MB |
689 | |
690 | return ret; | |
cd9e9808 | 691 | } |
17912c49 | 692 | EXPORT_SYMBOL(nvm_erase_sync); |
cd9e9808 | 693 | |
da2d7cb8 | 694 | int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb, |
959e911b JG |
695 | nvm_l2p_update_fn *update_l2p, void *priv) |
696 | { | |
da2d7cb8 JG |
697 | struct nvm_dev *dev = tgt_dev->parent; |
698 | ||
959e911b JG |
699 | if (!dev->ops->get_l2p_tbl) |
700 | return 0; | |
701 | ||
702 | return dev->ops->get_l2p_tbl(dev, slba, nlb, update_l2p, priv); | |
703 | } | |
704 | EXPORT_SYMBOL(nvm_get_l2p_tbl); | |
705 | ||
da2d7cb8 | 706 | int nvm_get_area(struct nvm_tgt_dev *tgt_dev, sector_t *lba, sector_t len) |
959e911b | 707 | { |
da2d7cb8 | 708 | struct nvm_dev *dev = tgt_dev->parent; |
ade69e24 MB |
709 | struct nvm_geo *geo = &dev->geo; |
710 | struct nvm_area *area, *prev, *next; | |
711 | sector_t begin = 0; | |
712 | sector_t max_sectors = (geo->sec_size * dev->total_secs) >> 9; | |
713 | ||
714 | if (len > max_sectors) | |
715 | return -EINVAL; | |
716 | ||
717 | area = kmalloc(sizeof(struct nvm_area), GFP_KERNEL); | |
718 | if (!area) | |
719 | return -ENOMEM; | |
720 | ||
721 | prev = NULL; | |
722 | ||
723 | spin_lock(&dev->lock); | |
724 | list_for_each_entry(next, &dev->area_list, list) { | |
725 | if (begin + len > next->begin) { | |
726 | begin = next->end; | |
727 | prev = next; | |
728 | continue; | |
729 | } | |
730 | break; | |
731 | } | |
732 | ||
733 | if ((begin + len) > max_sectors) { | |
734 | spin_unlock(&dev->lock); | |
735 | kfree(area); | |
736 | return -EINVAL; | |
737 | } | |
da2d7cb8 | 738 | |
ade69e24 MB |
739 | area->begin = *lba = begin; |
740 | area->end = begin + len; | |
741 | ||
742 | if (prev) /* insert into sorted order */ | |
743 | list_add(&area->list, &prev->list); | |
744 | else | |
745 | list_add(&area->list, &dev->area_list); | |
746 | spin_unlock(&dev->lock); | |
747 | ||
748 | return 0; | |
959e911b JG |
749 | } |
750 | EXPORT_SYMBOL(nvm_get_area); | |
751 | ||
ade69e24 | 752 | void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin) |
959e911b | 753 | { |
da2d7cb8 | 754 | struct nvm_dev *dev = tgt_dev->parent; |
ade69e24 | 755 | struct nvm_area *area; |
da2d7cb8 | 756 | |
ade69e24 MB |
757 | spin_lock(&dev->lock); |
758 | list_for_each_entry(area, &dev->area_list, list) { | |
759 | if (area->begin != begin) | |
760 | continue; | |
761 | ||
762 | list_del(&area->list); | |
763 | spin_unlock(&dev->lock); | |
764 | kfree(area); | |
765 | return; | |
766 | } | |
767 | spin_unlock(&dev->lock); | |
959e911b JG |
768 | } |
769 | EXPORT_SYMBOL(nvm_put_area); | |
770 | ||
17912c49 | 771 | int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, |
8680f165 | 772 | const struct ppa_addr *ppas, int nr_ppas, int vblk) |
069368e9 | 773 | { |
17912c49 JG |
774 | struct nvm_dev *dev = tgt_dev->parent; |
775 | struct nvm_geo *geo = &tgt_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 | ||
17912c49 | 813 | void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
abd805ec MB |
814 | { |
815 | if (!rqd->ppa_list) | |
816 | return; | |
817 | ||
17912c49 | 818 | nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list); |
abd805ec MB |
819 | } |
820 | EXPORT_SYMBOL(nvm_free_rqd_ppalist); | |
821 | ||
06894efe | 822 | void nvm_end_io(struct nvm_rq *rqd) |
91276162 | 823 | { |
ade69e24 | 824 | struct nvm_tgt_dev *tgt_dev = rqd->dev; |
ade69e24 MB |
825 | |
826 | /* Convert address space */ | |
827 | if (tgt_dev) | |
dab8ee9e | 828 | nvm_rq_dev_to_tgt(tgt_dev, rqd); |
ade69e24 | 829 | |
06894efe MB |
830 | if (rqd->end_io) |
831 | rqd->end_io(rqd); | |
91276162 MB |
832 | } |
833 | EXPORT_SYMBOL(nvm_end_io); | |
834 | ||
22e8c976 MB |
835 | /* |
836 | * folds a bad block list from its plane representation to its virtual | |
837 | * block representation. The fold is done in place and reduced size is | |
838 | * returned. | |
839 | * | |
840 | * If any of the planes status are bad or grown bad block, the virtual block | |
841 | * is marked bad. If not bad, the first plane state acts as the block state. | |
842 | */ | |
843 | int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks) | |
844 | { | |
8e79b5cb | 845 | struct nvm_geo *geo = &dev->geo; |
22e8c976 MB |
846 | int blk, offset, pl, blktype; |
847 | ||
8e79b5cb | 848 | if (nr_blks != geo->blks_per_lun * geo->plane_mode) |
22e8c976 MB |
849 | return -EINVAL; |
850 | ||
8e79b5cb JG |
851 | for (blk = 0; blk < geo->blks_per_lun; blk++) { |
852 | offset = blk * geo->plane_mode; | |
22e8c976 MB |
853 | blktype = blks[offset]; |
854 | ||
855 | /* Bad blocks on any planes take precedence over other types */ | |
8e79b5cb | 856 | for (pl = 0; pl < geo->plane_mode; pl++) { |
22e8c976 MB |
857 | if (blks[offset + pl] & |
858 | (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { | |
859 | blktype = blks[offset + pl]; | |
860 | break; | |
861 | } | |
862 | } | |
863 | ||
864 | blks[blk] = blktype; | |
865 | } | |
866 | ||
8e79b5cb | 867 | return geo->blks_per_lun; |
22e8c976 MB |
868 | } |
869 | EXPORT_SYMBOL(nvm_bb_tbl_fold); | |
870 | ||
333ba053 JG |
871 | int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa, |
872 | u8 *blks) | |
873 | { | |
8f4fe008 MB |
874 | struct nvm_dev *dev = tgt_dev->parent; |
875 | ||
dab8ee9e | 876 | nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1); |
333ba053 | 877 | |
8f4fe008 | 878 | return dev->ops->get_bb_tbl(dev, ppa, blks); |
333ba053 JG |
879 | } |
880 | EXPORT_SYMBOL(nvm_get_tgt_bb_tbl); | |
881 | ||
ca5927e7 MB |
882 | static int nvm_init_slc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) |
883 | { | |
8e79b5cb | 884 | struct nvm_geo *geo = &dev->geo; |
ca5927e7 MB |
885 | int i; |
886 | ||
8e79b5cb | 887 | dev->lps_per_blk = geo->pgs_per_blk; |
ca5927e7 MB |
888 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); |
889 | if (!dev->lptbl) | |
890 | return -ENOMEM; | |
891 | ||
892 | /* Just a linear array */ | |
893 | for (i = 0; i < dev->lps_per_blk; i++) | |
894 | dev->lptbl[i] = i; | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | static int nvm_init_mlc_tbl(struct nvm_dev *dev, struct nvm_id_group *grp) | |
900 | { | |
901 | int i, p; | |
902 | struct nvm_id_lp_mlc *mlc = &grp->lptbl.mlc; | |
903 | ||
904 | if (!mlc->num_pairs) | |
905 | return 0; | |
906 | ||
907 | dev->lps_per_blk = mlc->num_pairs; | |
908 | dev->lptbl = kcalloc(dev->lps_per_blk, sizeof(int), GFP_KERNEL); | |
909 | if (!dev->lptbl) | |
910 | return -ENOMEM; | |
911 | ||
912 | /* The lower page table encoding consists of a list of bytes, where each | |
913 | * has a lower and an upper half. The first half byte maintains the | |
914 | * increment value and every value after is an offset added to the | |
12624af2 MB |
915 | * previous incrementation value |
916 | */ | |
ca5927e7 MB |
917 | dev->lptbl[0] = mlc->pairs[0] & 0xF; |
918 | for (i = 1; i < dev->lps_per_blk; i++) { | |
919 | p = mlc->pairs[i >> 1]; | |
920 | if (i & 0x1) /* upper */ | |
921 | dev->lptbl[i] = dev->lptbl[i - 1] + ((p & 0xF0) >> 4); | |
922 | else /* lower */ | |
923 | dev->lptbl[i] = dev->lptbl[i - 1] + (p & 0xF); | |
924 | } | |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
cd9e9808 MB |
929 | static int nvm_core_init(struct nvm_dev *dev) |
930 | { | |
931 | struct nvm_id *id = &dev->identity; | |
19bd6fe7 | 932 | struct nvm_id_group *grp = &id->grp; |
8e79b5cb | 933 | struct nvm_geo *geo = &dev->geo; |
7f7c5d03 | 934 | int ret; |
cd9e9808 | 935 | |
8e79b5cb JG |
936 | /* Whole device values */ |
937 | geo->nr_chnls = grp->num_ch; | |
938 | geo->luns_per_chnl = grp->num_lun; | |
939 | ||
940 | /* Generic device values */ | |
941 | geo->pgs_per_blk = grp->num_pg; | |
942 | geo->blks_per_lun = grp->num_blk; | |
943 | geo->nr_planes = grp->num_pln; | |
944 | geo->fpg_size = grp->fpg_sz; | |
945 | geo->pfpg_size = grp->fpg_sz * grp->num_pln; | |
946 | geo->sec_size = grp->csecs; | |
947 | geo->oob_size = grp->sos; | |
948 | geo->sec_per_pg = grp->fpg_sz / grp->csecs; | |
949 | geo->mccap = grp->mccap; | |
950 | memcpy(&geo->ppaf, &id->ppaf, sizeof(struct nvm_addr_format)); | |
951 | ||
952 | geo->plane_mode = NVM_PLANE_SINGLE; | |
953 | geo->max_rq_size = dev->ops->max_phys_sect * geo->sec_size; | |
cd9e9808 MB |
954 | |
955 | if (grp->mpos & 0x020202) | |
8e79b5cb | 956 | geo->plane_mode = NVM_PLANE_DOUBLE; |
cd9e9808 | 957 | if (grp->mpos & 0x040404) |
8e79b5cb | 958 | geo->plane_mode = NVM_PLANE_QUAD; |
cd9e9808 | 959 | |
7f7c5d03 MB |
960 | if (grp->mtype != 0) { |
961 | pr_err("nvm: memory type not supported\n"); | |
962 | return -EINVAL; | |
963 | } | |
964 | ||
cd9e9808 | 965 | /* calculated values */ |
8e79b5cb JG |
966 | geo->sec_per_pl = geo->sec_per_pg * geo->nr_planes; |
967 | geo->sec_per_blk = geo->sec_per_pl * geo->pgs_per_blk; | |
968 | geo->sec_per_lun = geo->sec_per_blk * geo->blks_per_lun; | |
969 | geo->nr_luns = geo->luns_per_chnl * geo->nr_chnls; | |
cd9e9808 | 970 | |
8e79b5cb JG |
971 | dev->total_secs = geo->nr_luns * geo->sec_per_lun; |
972 | dev->lun_map = kcalloc(BITS_TO_LONGS(geo->nr_luns), | |
da1e2849 WT |
973 | sizeof(unsigned long), GFP_KERNEL); |
974 | if (!dev->lun_map) | |
975 | return -ENOMEM; | |
7f7c5d03 MB |
976 | |
977 | switch (grp->fmtype) { | |
978 | case NVM_ID_FMTYPE_SLC: | |
979 | if (nvm_init_slc_tbl(dev, grp)) { | |
980 | ret = -ENOMEM; | |
981 | goto err_fmtype; | |
982 | } | |
983 | break; | |
984 | case NVM_ID_FMTYPE_MLC: | |
985 | if (nvm_init_mlc_tbl(dev, grp)) { | |
986 | ret = -ENOMEM; | |
987 | goto err_fmtype; | |
988 | } | |
989 | break; | |
990 | default: | |
991 | pr_err("nvm: flash type not supported\n"); | |
992 | ret = -EINVAL; | |
993 | goto err_fmtype; | |
994 | } | |
995 | ||
ade69e24 MB |
996 | INIT_LIST_HEAD(&dev->area_list); |
997 | INIT_LIST_HEAD(&dev->targets); | |
e3eb3799 | 998 | mutex_init(&dev->mlock); |
4c9dacb8 | 999 | spin_lock_init(&dev->lock); |
cd9e9808 | 1000 | |
ade69e24 MB |
1001 | ret = nvm_register_map(dev); |
1002 | if (ret) | |
1003 | goto err_fmtype; | |
ac81bfa9 | 1004 | |
ade69e24 | 1005 | blk_queue_logical_block_size(dev->q, geo->sec_size); |
cd9e9808 | 1006 | return 0; |
7f7c5d03 MB |
1007 | err_fmtype: |
1008 | kfree(dev->lun_map); | |
1009 | return ret; | |
cd9e9808 MB |
1010 | } |
1011 | ||
46b160ce | 1012 | static void nvm_free(struct nvm_dev *dev) |
cd9e9808 MB |
1013 | { |
1014 | if (!dev) | |
1015 | return; | |
1016 | ||
40267efd SL |
1017 | if (dev->dma_pool) |
1018 | dev->ops->destroy_dma_pool(dev->dma_pool); | |
1019 | ||
7a3de2b3 | 1020 | nvm_unregister_map(dev); |
ca5927e7 | 1021 | kfree(dev->lptbl); |
7f7c5d03 | 1022 | kfree(dev->lun_map); |
40267efd | 1023 | kfree(dev); |
cd9e9808 MB |
1024 | } |
1025 | ||
1026 | static int nvm_init(struct nvm_dev *dev) | |
1027 | { | |
8e79b5cb | 1028 | struct nvm_geo *geo = &dev->geo; |
480fc0db | 1029 | int ret = -EINVAL; |
cd9e9808 | 1030 | |
16f26c3a | 1031 | if (dev->ops->identity(dev, &dev->identity)) { |
cd9e9808 | 1032 | pr_err("nvm: device could not be identified\n"); |
cd9e9808 MB |
1033 | goto err; |
1034 | } | |
1035 | ||
19bd6fe7 MB |
1036 | pr_debug("nvm: ver:%x nvm_vendor:%x\n", |
1037 | dev->identity.ver_id, dev->identity.vmnt); | |
cd9e9808 MB |
1038 | |
1039 | if (dev->identity.ver_id != 1) { | |
1040 | pr_err("nvm: device not supported by kernel."); | |
1041 | goto err; | |
1042 | } | |
1043 | ||
cd9e9808 MB |
1044 | ret = nvm_core_init(dev); |
1045 | if (ret) { | |
1046 | pr_err("nvm: could not initialize core structures.\n"); | |
1047 | goto err; | |
1048 | } | |
1049 | ||
cd9e9808 | 1050 | pr_info("nvm: registered %s [%u/%u/%u/%u/%u/%u]\n", |
8e79b5cb JG |
1051 | dev->name, geo->sec_per_pg, geo->nr_planes, |
1052 | geo->pgs_per_blk, geo->blks_per_lun, | |
1053 | geo->nr_luns, geo->nr_chnls); | |
cd9e9808 MB |
1054 | return 0; |
1055 | err: | |
cd9e9808 MB |
1056 | pr_err("nvm: failed to initialize nvm\n"); |
1057 | return ret; | |
1058 | } | |
1059 | ||
b0b4e09c | 1060 | struct nvm_dev *nvm_alloc_dev(int node) |
cd9e9808 | 1061 | { |
b0b4e09c | 1062 | return kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node); |
cd9e9808 | 1063 | } |
b0b4e09c | 1064 | EXPORT_SYMBOL(nvm_alloc_dev); |
cd9e9808 | 1065 | |
b0b4e09c | 1066 | int nvm_register(struct nvm_dev *dev) |
cd9e9808 | 1067 | { |
cd9e9808 MB |
1068 | int ret; |
1069 | ||
ade69e24 MB |
1070 | if (!dev->q || !dev->ops) |
1071 | return -EINVAL; | |
cd9e9808 | 1072 | |
d160147b WT |
1073 | if (dev->ops->max_phys_sect > 256) { |
1074 | pr_info("nvm: max sectors supported is 256.\n"); | |
ade69e24 | 1075 | return -EINVAL; |
d160147b WT |
1076 | } |
1077 | ||
cd9e9808 | 1078 | if (dev->ops->max_phys_sect > 1) { |
75b85649 JG |
1079 | dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist"); |
1080 | if (!dev->dma_pool) { | |
1081 | pr_err("nvm: could not create dma pool\n"); | |
ade69e24 | 1082 | return -ENOMEM; |
cd9e9808 | 1083 | } |
cd9e9808 MB |
1084 | } |
1085 | ||
ade69e24 MB |
1086 | ret = nvm_init(dev); |
1087 | if (ret) | |
1088 | goto err_init; | |
b7692076 | 1089 | |
762796bc | 1090 | /* register device with a supported media manager */ |
edad2e66 MB |
1091 | down_write(&nvm_lock); |
1092 | list_add(&dev->devices, &nvm_devices); | |
1093 | up_write(&nvm_lock); | |
1094 | ||
cd9e9808 MB |
1095 | return 0; |
1096 | err_init: | |
ade69e24 | 1097 | dev->ops->destroy_dma_pool(dev->dma_pool); |
cd9e9808 MB |
1098 | return ret; |
1099 | } | |
1100 | EXPORT_SYMBOL(nvm_register); | |
1101 | ||
b0b4e09c | 1102 | void nvm_unregister(struct nvm_dev *dev) |
cd9e9808 | 1103 | { |
ade69e24 MB |
1104 | struct nvm_target *t, *tmp; |
1105 | ||
1106 | mutex_lock(&dev->mlock); | |
1107 | list_for_each_entry_safe(t, tmp, &dev->targets, list) { | |
1108 | if (t->dev->parent != dev) | |
1109 | continue; | |
1110 | __nvm_remove_target(t); | |
1111 | } | |
1112 | mutex_unlock(&dev->mlock); | |
1113 | ||
d0a712ce | 1114 | down_write(&nvm_lock); |
cd9e9808 MB |
1115 | list_del(&dev->devices); |
1116 | up_write(&nvm_lock); | |
c1480ad5 | 1117 | |
3dc87dd0 | 1118 | nvm_free(dev); |
cd9e9808 MB |
1119 | } |
1120 | EXPORT_SYMBOL(nvm_unregister); | |
1121 | ||
cd9e9808 MB |
1122 | static int __nvm_configure_create(struct nvm_ioctl_create *create) |
1123 | { | |
1124 | struct nvm_dev *dev; | |
1125 | struct nvm_ioctl_create_simple *s; | |
1126 | ||
d0a712ce | 1127 | down_write(&nvm_lock); |
cd9e9808 | 1128 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 1129 | up_write(&nvm_lock); |
b76eb20b | 1130 | |
cd9e9808 MB |
1131 | if (!dev) { |
1132 | pr_err("nvm: device not found\n"); | |
1133 | return -EINVAL; | |
1134 | } | |
1135 | ||
1136 | if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) { | |
1137 | pr_err("nvm: config type not valid\n"); | |
1138 | return -EINVAL; | |
1139 | } | |
1140 | s = &create->conf.s; | |
1141 | ||
6732c740 MB |
1142 | if (s->lun_begin == -1 && s->lun_end == -1) { |
1143 | s->lun_begin = 0; | |
1144 | s->lun_end = dev->geo.nr_luns - 1; | |
1145 | } | |
1146 | ||
0e5ffd1c | 1147 | if (s->lun_begin > s->lun_end || s->lun_end >= dev->geo.nr_luns) { |
cd9e9808 | 1148 | pr_err("nvm: lun out of bound (%u:%u > %u)\n", |
0e5ffd1c | 1149 | s->lun_begin, s->lun_end, dev->geo.nr_luns - 1); |
cd9e9808 MB |
1150 | return -EINVAL; |
1151 | } | |
1152 | ||
ade69e24 | 1153 | return nvm_create_tgt(dev, create); |
cd9e9808 MB |
1154 | } |
1155 | ||
cd9e9808 MB |
1156 | static long nvm_ioctl_info(struct file *file, void __user *arg) |
1157 | { | |
1158 | struct nvm_ioctl_info *info; | |
1159 | struct nvm_tgt_type *tt; | |
1160 | int tgt_iter = 0; | |
1161 | ||
1162 | if (!capable(CAP_SYS_ADMIN)) | |
1163 | return -EPERM; | |
1164 | ||
1165 | info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); | |
1166 | if (IS_ERR(info)) | |
1167 | return -EFAULT; | |
1168 | ||
1169 | info->version[0] = NVM_VERSION_MAJOR; | |
1170 | info->version[1] = NVM_VERSION_MINOR; | |
1171 | info->version[2] = NVM_VERSION_PATCH; | |
1172 | ||
1173 | down_write(&nvm_lock); | |
6063fe39 | 1174 | list_for_each_entry(tt, &nvm_tgt_types, list) { |
cd9e9808 MB |
1175 | struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; |
1176 | ||
1177 | tgt->version[0] = tt->version[0]; | |
1178 | tgt->version[1] = tt->version[1]; | |
1179 | tgt->version[2] = tt->version[2]; | |
1180 | strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); | |
1181 | ||
1182 | tgt_iter++; | |
1183 | } | |
1184 | ||
1185 | info->tgtsize = tgt_iter; | |
1186 | up_write(&nvm_lock); | |
1187 | ||
76e25081 SM |
1188 | if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { |
1189 | kfree(info); | |
cd9e9808 | 1190 | return -EFAULT; |
76e25081 | 1191 | } |
cd9e9808 MB |
1192 | |
1193 | kfree(info); | |
1194 | return 0; | |
1195 | } | |
1196 | ||
1197 | static long nvm_ioctl_get_devices(struct file *file, void __user *arg) | |
1198 | { | |
1199 | struct nvm_ioctl_get_devices *devices; | |
1200 | struct nvm_dev *dev; | |
1201 | int i = 0; | |
1202 | ||
1203 | if (!capable(CAP_SYS_ADMIN)) | |
1204 | return -EPERM; | |
1205 | ||
1206 | devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); | |
1207 | if (!devices) | |
1208 | return -ENOMEM; | |
1209 | ||
1210 | down_write(&nvm_lock); | |
1211 | list_for_each_entry(dev, &nvm_devices, devices) { | |
1212 | struct nvm_ioctl_device_info *info = &devices->info[i]; | |
1213 | ||
6eb08245 | 1214 | strlcpy(info->devname, dev->name, sizeof(info->devname)); |
cd9e9808 | 1215 | |
ade69e24 MB |
1216 | /* kept for compatibility */ |
1217 | info->bmversion[0] = 1; | |
1218 | info->bmversion[1] = 0; | |
1219 | info->bmversion[2] = 0; | |
6eb08245 | 1220 | strlcpy(info->bmname, "gennvm", sizeof(info->bmname)); |
cd9e9808 | 1221 | i++; |
ade69e24 | 1222 | |
cd9e9808 MB |
1223 | if (i > 31) { |
1224 | pr_err("nvm: max 31 devices can be reported.\n"); | |
1225 | break; | |
1226 | } | |
1227 | } | |
1228 | up_write(&nvm_lock); | |
1229 | ||
1230 | devices->nr_devices = i; | |
1231 | ||
76e25081 SM |
1232 | if (copy_to_user(arg, devices, |
1233 | sizeof(struct nvm_ioctl_get_devices))) { | |
1234 | kfree(devices); | |
cd9e9808 | 1235 | return -EFAULT; |
76e25081 | 1236 | } |
cd9e9808 MB |
1237 | |
1238 | kfree(devices); | |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
1243 | { | |
1244 | struct nvm_ioctl_create create; | |
1245 | ||
1246 | if (!capable(CAP_SYS_ADMIN)) | |
1247 | return -EPERM; | |
1248 | ||
1249 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) | |
1250 | return -EFAULT; | |
1251 | ||
1252 | create.dev[DISK_NAME_LEN - 1] = '\0'; | |
1253 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
1254 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1255 | ||
1256 | if (create.flags != 0) { | |
4af3f75d JG |
1257 | __u32 flags = create.flags; |
1258 | ||
1259 | /* Check for valid flags */ | |
1260 | if (flags & NVM_TARGET_FACTORY) | |
1261 | flags &= ~NVM_TARGET_FACTORY; | |
1262 | ||
1263 | if (flags) { | |
1264 | pr_err("nvm: flag not supported\n"); | |
1265 | return -EINVAL; | |
1266 | } | |
cd9e9808 MB |
1267 | } |
1268 | ||
1269 | return __nvm_configure_create(&create); | |
1270 | } | |
1271 | ||
1272 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
1273 | { | |
1274 | struct nvm_ioctl_remove remove; | |
b76eb20b MB |
1275 | struct nvm_dev *dev; |
1276 | int ret = 0; | |
cd9e9808 MB |
1277 | |
1278 | if (!capable(CAP_SYS_ADMIN)) | |
1279 | return -EPERM; | |
1280 | ||
1281 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) | |
1282 | return -EFAULT; | |
1283 | ||
1284 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1285 | ||
1286 | if (remove.flags != 0) { | |
1287 | pr_err("nvm: no flags supported\n"); | |
1288 | return -EINVAL; | |
1289 | } | |
1290 | ||
b76eb20b | 1291 | list_for_each_entry(dev, &nvm_devices, devices) { |
ade69e24 | 1292 | ret = nvm_remove_tgt(dev, &remove); |
b76eb20b MB |
1293 | if (!ret) |
1294 | break; | |
1295 | } | |
1296 | ||
1297 | return ret; | |
cd9e9808 MB |
1298 | } |
1299 | ||
ade69e24 | 1300 | /* kept for compatibility reasons */ |
55696154 MB |
1301 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) |
1302 | { | |
1303 | struct nvm_ioctl_dev_init init; | |
1304 | ||
1305 | if (!capable(CAP_SYS_ADMIN)) | |
1306 | return -EPERM; | |
1307 | ||
1308 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) | |
1309 | return -EFAULT; | |
1310 | ||
1311 | if (init.flags != 0) { | |
1312 | pr_err("nvm: no flags supported\n"); | |
1313 | return -EINVAL; | |
1314 | } | |
1315 | ||
ade69e24 | 1316 | return 0; |
55696154 MB |
1317 | } |
1318 | ||
ade69e24 | 1319 | /* Kept for compatibility reasons */ |
8b4970c4 MB |
1320 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
1321 | { | |
1322 | struct nvm_ioctl_dev_factory fact; | |
8b4970c4 MB |
1323 | |
1324 | if (!capable(CAP_SYS_ADMIN)) | |
1325 | return -EPERM; | |
1326 | ||
1327 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) | |
1328 | return -EFAULT; | |
1329 | ||
1330 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1331 | ||
1332 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1333 | return -EINVAL; | |
1334 | ||
bf643185 | 1335 | return 0; |
8b4970c4 MB |
1336 | } |
1337 | ||
cd9e9808 MB |
1338 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1339 | { | |
1340 | void __user *argp = (void __user *)arg; | |
1341 | ||
1342 | switch (cmd) { | |
1343 | case NVM_INFO: | |
1344 | return nvm_ioctl_info(file, argp); | |
1345 | case NVM_GET_DEVICES: | |
1346 | return nvm_ioctl_get_devices(file, argp); | |
1347 | case NVM_DEV_CREATE: | |
1348 | return nvm_ioctl_dev_create(file, argp); | |
1349 | case NVM_DEV_REMOVE: | |
1350 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1351 | case NVM_DEV_INIT: |
1352 | return nvm_ioctl_dev_init(file, argp); | |
8b4970c4 MB |
1353 | case NVM_DEV_FACTORY: |
1354 | return nvm_ioctl_dev_factory(file, argp); | |
cd9e9808 MB |
1355 | } |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static const struct file_operations _ctl_fops = { | |
1360 | .open = nonseekable_open, | |
1361 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1362 | .owner = THIS_MODULE, | |
1363 | .llseek = noop_llseek, | |
1364 | }; | |
1365 | ||
1366 | static struct miscdevice _nvm_misc = { | |
1367 | .minor = MISC_DYNAMIC_MINOR, | |
1368 | .name = "lightnvm", | |
1369 | .nodename = "lightnvm/control", | |
1370 | .fops = &_ctl_fops, | |
1371 | }; | |
389b2a1c | 1372 | builtin_misc_device(_nvm_misc); |