Commit | Line | Data |
---|---|---|
a98c5b19 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
cd9e9808 MB |
2 | /* |
3 | * Copyright (C) 2015 IT University of Copenhagen. All rights reserved. | |
4 | * Initial release: Matias Bjorling <m@bjorling.me> | |
cd9e9808 MB |
5 | */ |
6 | ||
43db059e MI |
7 | #define pr_fmt(fmt) "nvm: " fmt |
8 | ||
cd9e9808 MB |
9 | #include <linux/list.h> |
10 | #include <linux/types.h> | |
11 | #include <linux/sem.h> | |
12 | #include <linux/bitmap.h> | |
90014829 | 13 | #include <linux/module.h> |
389b2a1c | 14 | #include <linux/moduleparam.h> |
cd9e9808 MB |
15 | #include <linux/miscdevice.h> |
16 | #include <linux/lightnvm.h> | |
91276162 | 17 | #include <linux/sched/sysctl.h> |
cd9e9808 | 18 | |
6063fe39 | 19 | static LIST_HEAD(nvm_tgt_types); |
5cd90785 | 20 | static DECLARE_RWSEM(nvm_tgtt_lock); |
cd9e9808 MB |
21 | static LIST_HEAD(nvm_devices); |
22 | static DECLARE_RWSEM(nvm_lock); | |
23 | ||
ade69e24 MB |
24 | /* Map between virtual and physical channel and lun */ |
25 | struct nvm_ch_map { | |
26 | int ch_off; | |
a40afad9 | 27 | int num_lun; |
ade69e24 MB |
28 | int *lun_offs; |
29 | }; | |
30 | ||
31 | struct nvm_dev_map { | |
32 | struct nvm_ch_map *chnls; | |
a40afad9 | 33 | int num_ch; |
ade69e24 MB |
34 | }; |
35 | ||
e69397ea IK |
36 | static void nvm_free(struct kref *ref); |
37 | ||
ade69e24 MB |
38 | static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name) |
39 | { | |
40 | struct nvm_target *tgt; | |
41 | ||
42 | list_for_each_entry(tgt, &dev->targets, list) | |
43 | if (!strcmp(name, tgt->disk->disk_name)) | |
44 | return tgt; | |
45 | ||
46 | return NULL; | |
47 | } | |
48 | ||
bd77b23b JG |
49 | static bool nvm_target_exists(const char *name) |
50 | { | |
51 | struct nvm_dev *dev; | |
52 | struct nvm_target *tgt; | |
53 | bool ret = false; | |
54 | ||
55 | down_write(&nvm_lock); | |
56 | list_for_each_entry(dev, &nvm_devices, devices) { | |
57 | mutex_lock(&dev->mlock); | |
58 | list_for_each_entry(tgt, &dev->targets, list) { | |
59 | if (!strcmp(name, tgt->disk->disk_name)) { | |
60 | ret = true; | |
61 | mutex_unlock(&dev->mlock); | |
62 | goto out; | |
63 | } | |
64 | } | |
65 | mutex_unlock(&dev->mlock); | |
66 | } | |
67 | ||
68 | out: | |
69 | up_write(&nvm_lock); | |
70 | return ret; | |
71 | } | |
72 | ||
ade69e24 MB |
73 | static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end) |
74 | { | |
75 | int i; | |
76 | ||
77 | for (i = lun_begin; i <= lun_end; i++) { | |
78 | if (test_and_set_bit(i, dev->lun_map)) { | |
43db059e | 79 | pr_err("lun %d already allocated\n", i); |
ade69e24 MB |
80 | goto err; |
81 | } | |
82 | } | |
83 | ||
84 | return 0; | |
85 | err: | |
507f7d68 | 86 | while (--i >= lun_begin) |
ade69e24 MB |
87 | clear_bit(i, dev->lun_map); |
88 | ||
89 | return -EBUSY; | |
90 | } | |
91 | ||
92 | static void nvm_release_luns_err(struct nvm_dev *dev, int lun_begin, | |
93 | int lun_end) | |
94 | { | |
95 | int i; | |
96 | ||
97 | for (i = lun_begin; i <= lun_end; i++) | |
98 | WARN_ON(!test_and_clear_bit(i, dev->lun_map)); | |
99 | } | |
100 | ||
edee1bdd | 101 | static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev, int clear) |
ade69e24 MB |
102 | { |
103 | struct nvm_dev *dev = tgt_dev->parent; | |
104 | struct nvm_dev_map *dev_map = tgt_dev->map; | |
105 | int i, j; | |
106 | ||
a40afad9 | 107 | for (i = 0; i < dev_map->num_ch; i++) { |
ade69e24 MB |
108 | struct nvm_ch_map *ch_map = &dev_map->chnls[i]; |
109 | int *lun_offs = ch_map->lun_offs; | |
110 | int ch = i + ch_map->ch_off; | |
111 | ||
edee1bdd | 112 | if (clear) { |
a40afad9 | 113 | for (j = 0; j < ch_map->num_lun; j++) { |
edee1bdd | 114 | int lun = j + lun_offs[j]; |
a40afad9 | 115 | int lunid = (ch * dev->geo.num_lun) + lun; |
ade69e24 | 116 | |
edee1bdd JG |
117 | WARN_ON(!test_and_clear_bit(lunid, |
118 | dev->lun_map)); | |
119 | } | |
ade69e24 MB |
120 | } |
121 | ||
122 | kfree(ch_map->lun_offs); | |
123 | } | |
124 | ||
125 | kfree(dev_map->chnls); | |
126 | kfree(dev_map); | |
127 | ||
128 | kfree(tgt_dev->luns); | |
129 | kfree(tgt_dev); | |
130 | } | |
131 | ||
132 | static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev, | |
e5392739 JG |
133 | u16 lun_begin, u16 lun_end, |
134 | u16 op) | |
ade69e24 MB |
135 | { |
136 | struct nvm_tgt_dev *tgt_dev = NULL; | |
137 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
138 | struct nvm_dev_map *dev_map; | |
139 | struct ppa_addr *luns; | |
a40afad9 JG |
140 | int num_lun = lun_end - lun_begin + 1; |
141 | int luns_left = num_lun; | |
142 | int num_ch = num_lun / dev->geo.num_lun; | |
143 | int num_ch_mod = num_lun % dev->geo.num_lun; | |
144 | int bch = lun_begin / dev->geo.num_lun; | |
145 | int blun = lun_begin % dev->geo.num_lun; | |
ade69e24 MB |
146 | int lunid = 0; |
147 | int lun_balanced = 1; | |
a40afad9 | 148 | int sec_per_lun, prev_num_lun; |
ade69e24 MB |
149 | int i, j; |
150 | ||
a40afad9 | 151 | num_ch = (num_ch_mod == 0) ? num_ch : num_ch + 1; |
ade69e24 MB |
152 | |
153 | dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
154 | if (!dev_map) | |
155 | goto err_dev; | |
156 | ||
a40afad9 | 157 | dev_map->chnls = kcalloc(num_ch, sizeof(struct nvm_ch_map), GFP_KERNEL); |
ade69e24 MB |
158 | if (!dev_map->chnls) |
159 | goto err_chnls; | |
160 | ||
a40afad9 | 161 | luns = kcalloc(num_lun, sizeof(struct ppa_addr), GFP_KERNEL); |
ade69e24 MB |
162 | if (!luns) |
163 | goto err_luns; | |
164 | ||
a40afad9 JG |
165 | prev_num_lun = (luns_left > dev->geo.num_lun) ? |
166 | dev->geo.num_lun : luns_left; | |
167 | for (i = 0; i < num_ch; i++) { | |
ade69e24 MB |
168 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch]; |
169 | int *lun_roffs = ch_rmap->lun_offs; | |
170 | struct nvm_ch_map *ch_map = &dev_map->chnls[i]; | |
171 | int *lun_offs; | |
a40afad9 JG |
172 | int luns_in_chnl = (luns_left > dev->geo.num_lun) ? |
173 | dev->geo.num_lun : luns_left; | |
ade69e24 | 174 | |
a40afad9 | 175 | if (lun_balanced && prev_num_lun != luns_in_chnl) |
ade69e24 MB |
176 | lun_balanced = 0; |
177 | ||
178 | ch_map->ch_off = ch_rmap->ch_off = bch; | |
a40afad9 | 179 | ch_map->num_lun = luns_in_chnl; |
ade69e24 MB |
180 | |
181 | lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
182 | if (!lun_offs) | |
183 | goto err_ch; | |
184 | ||
185 | for (j = 0; j < luns_in_chnl; j++) { | |
186 | luns[lunid].ppa = 0; | |
69471513 JG |
187 | luns[lunid].a.ch = i; |
188 | luns[lunid++].a.lun = j; | |
ade69e24 MB |
189 | |
190 | lun_offs[j] = blun; | |
191 | lun_roffs[j + blun] = blun; | |
192 | } | |
193 | ||
194 | ch_map->lun_offs = lun_offs; | |
195 | ||
196 | /* when starting a new channel, lun offset is reset */ | |
197 | blun = 0; | |
198 | luns_left -= luns_in_chnl; | |
199 | } | |
200 | ||
a40afad9 | 201 | dev_map->num_ch = num_ch; |
ade69e24 MB |
202 | |
203 | tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL); | |
204 | if (!tgt_dev) | |
205 | goto err_ch; | |
206 | ||
e46f4e48 | 207 | /* Inherit device geometry from parent */ |
ade69e24 | 208 | memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo)); |
e46f4e48 | 209 | |
ade69e24 | 210 | /* Target device only owns a portion of the physical device */ |
a40afad9 JG |
211 | tgt_dev->geo.num_ch = num_ch; |
212 | tgt_dev->geo.num_lun = (lun_balanced) ? prev_num_lun : -1; | |
213 | tgt_dev->geo.all_luns = num_lun; | |
214 | tgt_dev->geo.all_chunks = num_lun * dev->geo.num_chk; | |
e46f4e48 | 215 | |
e5392739 | 216 | tgt_dev->geo.op = op; |
e46f4e48 | 217 | |
a40afad9 JG |
218 | sec_per_lun = dev->geo.clba * dev->geo.num_chk; |
219 | tgt_dev->geo.total_secs = num_lun * sec_per_lun; | |
e46f4e48 | 220 | |
ade69e24 MB |
221 | tgt_dev->q = dev->q; |
222 | tgt_dev->map = dev_map; | |
223 | tgt_dev->luns = luns; | |
ade69e24 MB |
224 | tgt_dev->parent = dev; |
225 | ||
226 | return tgt_dev; | |
227 | err_ch: | |
507f7d68 | 228 | while (--i >= 0) |
ade69e24 MB |
229 | kfree(dev_map->chnls[i].lun_offs); |
230 | kfree(luns); | |
231 | err_luns: | |
232 | kfree(dev_map->chnls); | |
233 | err_chnls: | |
234 | kfree(dev_map); | |
235 | err_dev: | |
236 | return tgt_dev; | |
237 | } | |
238 | ||
239 | static const struct block_device_operations nvm_fops = { | |
240 | .owner = THIS_MODULE, | |
241 | }; | |
242 | ||
e29c80e6 | 243 | static struct nvm_tgt_type *__nvm_find_target_type(const char *name) |
eb6f168f | 244 | { |
e29c80e6 | 245 | struct nvm_tgt_type *tt; |
eb6f168f | 246 | |
e29c80e6 JG |
247 | list_for_each_entry(tt, &nvm_tgt_types, list) |
248 | if (!strcmp(name, tt->name)) | |
249 | return tt; | |
eb6f168f | 250 | |
e29c80e6 JG |
251 | return NULL; |
252 | } | |
253 | ||
254 | static struct nvm_tgt_type *nvm_find_target_type(const char *name) | |
255 | { | |
256 | struct nvm_tgt_type *tt; | |
257 | ||
258 | down_write(&nvm_tgtt_lock); | |
259 | tt = __nvm_find_target_type(name); | |
260 | up_write(&nvm_tgtt_lock); | |
eb6f168f | 261 | |
eb6f168f RP |
262 | return tt; |
263 | } | |
264 | ||
e5392739 JG |
265 | static int nvm_config_check_luns(struct nvm_geo *geo, int lun_begin, |
266 | int lun_end) | |
267 | { | |
268 | if (lun_begin > lun_end || lun_end >= geo->all_luns) { | |
43db059e | 269 | pr_err("lun out of bound (%u:%u > %u)\n", |
e5392739 JG |
270 | lun_begin, lun_end, geo->all_luns - 1); |
271 | return -EINVAL; | |
272 | } | |
273 | ||
274 | return 0; | |
275 | } | |
276 | ||
277 | static int __nvm_config_simple(struct nvm_dev *dev, | |
278 | struct nvm_ioctl_create_simple *s) | |
279 | { | |
280 | struct nvm_geo *geo = &dev->geo; | |
281 | ||
282 | if (s->lun_begin == -1 && s->lun_end == -1) { | |
283 | s->lun_begin = 0; | |
284 | s->lun_end = geo->all_luns - 1; | |
285 | } | |
286 | ||
287 | return nvm_config_check_luns(geo, s->lun_begin, s->lun_end); | |
288 | } | |
289 | ||
290 | static int __nvm_config_extended(struct nvm_dev *dev, | |
291 | struct nvm_ioctl_create_extended *e) | |
292 | { | |
e5392739 JG |
293 | if (e->lun_begin == 0xFFFF && e->lun_end == 0xFFFF) { |
294 | e->lun_begin = 0; | |
295 | e->lun_end = dev->geo.all_luns - 1; | |
296 | } | |
297 | ||
298 | /* op not set falls into target's default */ | |
9d7aa4a4 | 299 | if (e->op == 0xFFFF) { |
e5392739 | 300 | e->op = NVM_TARGET_DEFAULT_OP; |
9d7aa4a4 | 301 | } else if (e->op < NVM_TARGET_MIN_OP || e->op > NVM_TARGET_MAX_OP) { |
43db059e | 302 | pr_err("invalid over provisioning value\n"); |
e5392739 JG |
303 | return -EINVAL; |
304 | } | |
305 | ||
e46f4e48 | 306 | return nvm_config_check_luns(&dev->geo, e->lun_begin, e->lun_end); |
e5392739 JG |
307 | } |
308 | ||
ade69e24 MB |
309 | static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create) |
310 | { | |
e5392739 | 311 | struct nvm_ioctl_create_extended e; |
ade69e24 MB |
312 | struct request_queue *tqueue; |
313 | struct gendisk *tdisk; | |
314 | struct nvm_tgt_type *tt; | |
315 | struct nvm_target *t; | |
316 | struct nvm_tgt_dev *tgt_dev; | |
317 | void *targetdata; | |
a14669eb | 318 | unsigned int mdts; |
8d77bb82 | 319 | int ret; |
ade69e24 | 320 | |
e5392739 JG |
321 | switch (create->conf.type) { |
322 | case NVM_CONFIG_TYPE_SIMPLE: | |
323 | ret = __nvm_config_simple(dev, &create->conf.s); | |
324 | if (ret) | |
325 | return ret; | |
326 | ||
327 | e.lun_begin = create->conf.s.lun_begin; | |
328 | e.lun_end = create->conf.s.lun_end; | |
329 | e.op = NVM_TARGET_DEFAULT_OP; | |
330 | break; | |
331 | case NVM_CONFIG_TYPE_EXTENDED: | |
332 | ret = __nvm_config_extended(dev, &create->conf.e); | |
333 | if (ret) | |
334 | return ret; | |
335 | ||
336 | e = create->conf.e; | |
337 | break; | |
338 | default: | |
43db059e | 339 | pr_err("config type not valid\n"); |
e5392739 JG |
340 | return -EINVAL; |
341 | } | |
342 | ||
e29c80e6 | 343 | tt = nvm_find_target_type(create->tgttype); |
ade69e24 | 344 | if (!tt) { |
43db059e | 345 | pr_err("target type %s not found\n", create->tgttype); |
ade69e24 MB |
346 | return -EINVAL; |
347 | } | |
348 | ||
656e33ca | 349 | if ((tt->flags & NVM_TGT_F_HOST_L2P) != (dev->geo.dom & NVM_RSP_L2P)) { |
43db059e | 350 | pr_err("device is incompatible with target L2P type.\n"); |
656e33ca MB |
351 | return -EINVAL; |
352 | } | |
353 | ||
bd77b23b | 354 | if (nvm_target_exists(create->tgtname)) { |
43db059e | 355 | pr_err("target name already exists (%s)\n", |
bd77b23b | 356 | create->tgtname); |
ade69e24 MB |
357 | return -EINVAL; |
358 | } | |
ade69e24 | 359 | |
e5392739 | 360 | ret = nvm_reserve_luns(dev, e.lun_begin, e.lun_end); |
12e9a6d6 RP |
361 | if (ret) |
362 | return ret; | |
ade69e24 MB |
363 | |
364 | t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL); | |
8d77bb82 RP |
365 | if (!t) { |
366 | ret = -ENOMEM; | |
ade69e24 | 367 | goto err_reserve; |
8d77bb82 | 368 | } |
ade69e24 | 369 | |
e5392739 | 370 | tgt_dev = nvm_create_tgt_dev(dev, e.lun_begin, e.lun_end, e.op); |
ade69e24 | 371 | if (!tgt_dev) { |
43db059e | 372 | pr_err("could not create target device\n"); |
8d77bb82 | 373 | ret = -ENOMEM; |
ade69e24 MB |
374 | goto err_t; |
375 | } | |
376 | ||
7d1ef2f4 | 377 | tdisk = alloc_disk(0); |
8d77bb82 RP |
378 | if (!tdisk) { |
379 | ret = -ENOMEM; | |
7d1ef2f4 | 380 | goto err_dev; |
8d77bb82 | 381 | } |
7d1ef2f4 | 382 | |
3d745ea5 | 383 | tqueue = blk_alloc_queue(tt->make_rq, dev->q->node); |
8d77bb82 RP |
384 | if (!tqueue) { |
385 | ret = -ENOMEM; | |
7d1ef2f4 | 386 | goto err_disk; |
8d77bb82 | 387 | } |
ade69e24 | 388 | |
6eb08245 | 389 | strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name)); |
ade69e24 MB |
390 | tdisk->flags = GENHD_FL_EXT_DEVT; |
391 | tdisk->major = 0; | |
392 | tdisk->first_minor = 0; | |
393 | tdisk->fops = &nvm_fops; | |
394 | tdisk->queue = tqueue; | |
395 | ||
4af3f75d | 396 | targetdata = tt->init(tgt_dev, tdisk, create->flags); |
8d77bb82 RP |
397 | if (IS_ERR(targetdata)) { |
398 | ret = PTR_ERR(targetdata); | |
ade69e24 | 399 | goto err_init; |
8d77bb82 | 400 | } |
ade69e24 MB |
401 | |
402 | tdisk->private_data = targetdata; | |
403 | tqueue->queuedata = targetdata; | |
404 | ||
a14669eb IK |
405 | mdts = (dev->geo.csecs >> 9) * NVM_MAX_VLBA; |
406 | if (dev->geo.mdts) { | |
407 | mdts = min_t(u32, dev->geo.mdts, | |
408 | (dev->geo.csecs >> 9) * NVM_MAX_VLBA); | |
409 | } | |
410 | blk_queue_max_hw_sectors(tqueue, mdts); | |
ade69e24 MB |
411 | |
412 | set_capacity(tdisk, tt->capacity(targetdata)); | |
413 | add_disk(tdisk); | |
414 | ||
8d77bb82 RP |
415 | if (tt->sysfs_init && tt->sysfs_init(tdisk)) { |
416 | ret = -ENOMEM; | |
9a69b0ed | 417 | goto err_sysfs; |
8d77bb82 | 418 | } |
9a69b0ed | 419 | |
ade69e24 MB |
420 | t->type = tt; |
421 | t->disk = tdisk; | |
422 | t->dev = tgt_dev; | |
423 | ||
424 | mutex_lock(&dev->mlock); | |
425 | list_add_tail(&t->list, &dev->targets); | |
426 | mutex_unlock(&dev->mlock); | |
427 | ||
90014829 RP |
428 | __module_get(tt->owner); |
429 | ||
ade69e24 | 430 | return 0; |
9a69b0ed JG |
431 | err_sysfs: |
432 | if (tt->exit) | |
a7c9e910 | 433 | tt->exit(targetdata, true); |
ade69e24 | 434 | err_init: |
ade69e24 | 435 | blk_cleanup_queue(tqueue); |
75ba4ada | 436 | tdisk->queue = NULL; |
7d1ef2f4 JG |
437 | err_disk: |
438 | put_disk(tdisk); | |
ade69e24 | 439 | err_dev: |
edee1bdd | 440 | nvm_remove_tgt_dev(tgt_dev, 0); |
ade69e24 MB |
441 | err_t: |
442 | kfree(t); | |
443 | err_reserve: | |
e5392739 | 444 | nvm_release_luns_err(dev, e.lun_begin, e.lun_end); |
8d77bb82 | 445 | return ret; |
ade69e24 MB |
446 | } |
447 | ||
a7c9e910 | 448 | static void __nvm_remove_target(struct nvm_target *t, bool graceful) |
ade69e24 MB |
449 | { |
450 | struct nvm_tgt_type *tt = t->type; | |
451 | struct gendisk *tdisk = t->disk; | |
452 | struct request_queue *q = tdisk->queue; | |
453 | ||
454 | del_gendisk(tdisk); | |
455 | blk_cleanup_queue(q); | |
456 | ||
9a69b0ed JG |
457 | if (tt->sysfs_exit) |
458 | tt->sysfs_exit(tdisk); | |
459 | ||
ade69e24 | 460 | if (tt->exit) |
a7c9e910 | 461 | tt->exit(tdisk->private_data, graceful); |
ade69e24 | 462 | |
edee1bdd | 463 | nvm_remove_tgt_dev(t->dev, 1); |
ade69e24 | 464 | put_disk(tdisk); |
90014829 | 465 | module_put(t->type->owner); |
ade69e24 MB |
466 | |
467 | list_del(&t->list); | |
468 | kfree(t); | |
469 | } | |
470 | ||
471 | /** | |
472 | * nvm_remove_tgt - Removes a target from the media manager | |
ade69e24 MB |
473 | * @remove: ioctl structure with target name to remove. |
474 | * | |
475 | * Returns: | |
476 | * 0: on success | |
477 | * 1: on not found | |
478 | * <0: on error | |
479 | */ | |
843f2edb | 480 | static int nvm_remove_tgt(struct nvm_ioctl_remove *remove) |
ade69e24 | 481 | { |
2f5af4ab | 482 | struct nvm_target *t = NULL; |
843f2edb | 483 | struct nvm_dev *dev; |
ade69e24 | 484 | |
843f2edb IK |
485 | down_read(&nvm_lock); |
486 | list_for_each_entry(dev, &nvm_devices, devices) { | |
487 | mutex_lock(&dev->mlock); | |
488 | t = nvm_find_target(dev, remove->tgtname); | |
489 | if (t) { | |
490 | mutex_unlock(&dev->mlock); | |
491 | break; | |
492 | } | |
ade69e24 | 493 | mutex_unlock(&dev->mlock); |
ade69e24 | 494 | } |
843f2edb IK |
495 | up_read(&nvm_lock); |
496 | ||
362cd2b1 MI |
497 | if (!t) { |
498 | pr_err("failed to remove target %s\n", | |
499 | remove->tgtname); | |
843f2edb | 500 | return 1; |
362cd2b1 | 501 | } |
843f2edb | 502 | |
a7c9e910 | 503 | __nvm_remove_target(t, true); |
e69397ea | 504 | kref_put(&dev->ref, nvm_free); |
ade69e24 MB |
505 | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static int nvm_register_map(struct nvm_dev *dev) | |
510 | { | |
511 | struct nvm_dev_map *rmap; | |
512 | int i, j; | |
513 | ||
514 | rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL); | |
515 | if (!rmap) | |
516 | goto err_rmap; | |
517 | ||
a40afad9 | 518 | rmap->chnls = kcalloc(dev->geo.num_ch, sizeof(struct nvm_ch_map), |
ade69e24 MB |
519 | GFP_KERNEL); |
520 | if (!rmap->chnls) | |
521 | goto err_chnls; | |
522 | ||
a40afad9 | 523 | for (i = 0; i < dev->geo.num_ch; i++) { |
ade69e24 MB |
524 | struct nvm_ch_map *ch_rmap; |
525 | int *lun_roffs; | |
a40afad9 | 526 | int luns_in_chnl = dev->geo.num_lun; |
ade69e24 MB |
527 | |
528 | ch_rmap = &rmap->chnls[i]; | |
529 | ||
530 | ch_rmap->ch_off = -1; | |
a40afad9 | 531 | ch_rmap->num_lun = luns_in_chnl; |
ade69e24 MB |
532 | |
533 | lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL); | |
534 | if (!lun_roffs) | |
535 | goto err_ch; | |
536 | ||
537 | for (j = 0; j < luns_in_chnl; j++) | |
538 | lun_roffs[j] = -1; | |
539 | ||
540 | ch_rmap->lun_offs = lun_roffs; | |
541 | } | |
542 | ||
543 | dev->rmap = rmap; | |
544 | ||
545 | return 0; | |
546 | err_ch: | |
547 | while (--i >= 0) | |
548 | kfree(rmap->chnls[i].lun_offs); | |
549 | err_chnls: | |
550 | kfree(rmap); | |
551 | err_rmap: | |
552 | return -ENOMEM; | |
553 | } | |
554 | ||
7a3de2b3 JG |
555 | static void nvm_unregister_map(struct nvm_dev *dev) |
556 | { | |
557 | struct nvm_dev_map *rmap = dev->rmap; | |
558 | int i; | |
559 | ||
a40afad9 | 560 | for (i = 0; i < dev->geo.num_ch; i++) |
7a3de2b3 JG |
561 | kfree(rmap->chnls[i].lun_offs); |
562 | ||
563 | kfree(rmap->chnls); | |
564 | kfree(rmap); | |
565 | } | |
566 | ||
61a561d8 | 567 | static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
568 | { |
569 | struct nvm_dev_map *dev_map = tgt_dev->map; | |
69471513 JG |
570 | struct nvm_ch_map *ch_map = &dev_map->chnls[p->a.ch]; |
571 | int lun_off = ch_map->lun_offs[p->a.lun]; | |
ade69e24 | 572 | |
69471513 JG |
573 | p->a.ch += ch_map->ch_off; |
574 | p->a.lun += lun_off; | |
ade69e24 MB |
575 | } |
576 | ||
61a561d8 | 577 | static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p) |
ade69e24 MB |
578 | { |
579 | struct nvm_dev *dev = tgt_dev->parent; | |
580 | struct nvm_dev_map *dev_rmap = dev->rmap; | |
69471513 JG |
581 | struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->a.ch]; |
582 | int lun_roff = ch_rmap->lun_offs[p->a.lun]; | |
ade69e24 | 583 | |
69471513 JG |
584 | p->a.ch -= ch_rmap->ch_off; |
585 | p->a.lun -= lun_roff; | |
ade69e24 MB |
586 | } |
587 | ||
dab8ee9e MB |
588 | static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, |
589 | struct ppa_addr *ppa_list, int nr_ppas) | |
ade69e24 MB |
590 | { |
591 | int i; | |
ade69e24 | 592 | |
dab8ee9e MB |
593 | for (i = 0; i < nr_ppas; i++) { |
594 | nvm_map_to_dev(tgt_dev, &ppa_list[i]); | |
7100d50a | 595 | ppa_list[i] = generic_to_dev_addr(tgt_dev->parent, ppa_list[i]); |
ade69e24 | 596 | } |
dab8ee9e | 597 | } |
ade69e24 | 598 | |
dab8ee9e MB |
599 | static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, |
600 | struct ppa_addr *ppa_list, int nr_ppas) | |
601 | { | |
602 | int i; | |
603 | ||
604 | for (i = 0; i < nr_ppas; i++) { | |
7100d50a | 605 | ppa_list[i] = dev_to_generic_addr(tgt_dev->parent, ppa_list[i]); |
dab8ee9e | 606 | nvm_map_to_tgt(tgt_dev, &ppa_list[i]); |
ade69e24 | 607 | } |
ade69e24 MB |
608 | } |
609 | ||
dab8ee9e | 610 | static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) |
ade69e24 | 611 | { |
d68a9344 | 612 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
ade69e24 | 613 | |
d68a9344 | 614 | nvm_ppa_tgt_to_dev(tgt_dev, ppa_list, rqd->nr_ppas); |
dab8ee9e MB |
615 | } |
616 | ||
617 | static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd) | |
618 | { | |
d68a9344 | 619 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
ade69e24 | 620 | |
d68a9344 | 621 | nvm_ppa_dev_to_tgt(tgt_dev, ppa_list, rqd->nr_ppas); |
ade69e24 MB |
622 | } |
623 | ||
6063fe39 | 624 | int nvm_register_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
625 | { |
626 | int ret = 0; | |
627 | ||
5cd90785 | 628 | down_write(&nvm_tgtt_lock); |
e29c80e6 | 629 | if (__nvm_find_target_type(tt->name)) |
cd9e9808 MB |
630 | ret = -EEXIST; |
631 | else | |
6063fe39 | 632 | list_add(&tt->list, &nvm_tgt_types); |
5cd90785 | 633 | up_write(&nvm_tgtt_lock); |
cd9e9808 MB |
634 | |
635 | return ret; | |
636 | } | |
6063fe39 | 637 | EXPORT_SYMBOL(nvm_register_tgt_type); |
cd9e9808 | 638 | |
6063fe39 | 639 | void nvm_unregister_tgt_type(struct nvm_tgt_type *tt) |
cd9e9808 MB |
640 | { |
641 | if (!tt) | |
642 | return; | |
643 | ||
88d31ea2 | 644 | down_write(&nvm_tgtt_lock); |
cd9e9808 | 645 | list_del(&tt->list); |
88d31ea2 | 646 | up_write(&nvm_tgtt_lock); |
cd9e9808 | 647 | } |
6063fe39 | 648 | EXPORT_SYMBOL(nvm_unregister_tgt_type); |
cd9e9808 MB |
649 | |
650 | void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags, | |
651 | dma_addr_t *dma_handler) | |
652 | { | |
75b85649 | 653 | return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags, |
cd9e9808 MB |
654 | dma_handler); |
655 | } | |
656 | EXPORT_SYMBOL(nvm_dev_dma_alloc); | |
657 | ||
da2d7cb8 | 658 | void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler) |
cd9e9808 | 659 | { |
75b85649 | 660 | dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler); |
cd9e9808 MB |
661 | } |
662 | EXPORT_SYMBOL(nvm_dev_dma_free); | |
663 | ||
cd9e9808 MB |
664 | static struct nvm_dev *nvm_find_nvm_dev(const char *name) |
665 | { | |
666 | struct nvm_dev *dev; | |
667 | ||
668 | list_for_each_entry(dev, &nvm_devices, devices) | |
669 | if (!strcmp(name, dev->name)) | |
670 | return dev; | |
671 | ||
672 | return NULL; | |
673 | } | |
674 | ||
eb6f168f RP |
675 | static int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, |
676 | const struct ppa_addr *ppas, int nr_ppas) | |
677 | { | |
678 | struct nvm_dev *dev = tgt_dev->parent; | |
679 | struct nvm_geo *geo = &tgt_dev->geo; | |
680 | int i, plane_cnt, pl_idx; | |
681 | struct ppa_addr ppa; | |
682 | ||
a40afad9 | 683 | if (geo->pln_mode == NVM_PLANE_SINGLE && nr_ppas == 1) { |
eb6f168f RP |
684 | rqd->nr_ppas = nr_ppas; |
685 | rqd->ppa_addr = ppas[0]; | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
690 | rqd->nr_ppas = nr_ppas; | |
691 | rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list); | |
692 | if (!rqd->ppa_list) { | |
43db059e | 693 | pr_err("failed to allocate dma memory\n"); |
eb6f168f RP |
694 | return -ENOMEM; |
695 | } | |
696 | ||
a40afad9 | 697 | plane_cnt = geo->pln_mode; |
eb6f168f RP |
698 | rqd->nr_ppas *= plane_cnt; |
699 | ||
700 | for (i = 0; i < nr_ppas; i++) { | |
701 | for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) { | |
702 | ppa = ppas[i]; | |
703 | ppa.g.pl = pl_idx; | |
704 | rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa; | |
705 | } | |
706 | } | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | static void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, | |
712 | struct nvm_rq *rqd) | |
713 | { | |
714 | if (!rqd->ppa_list) | |
715 | return; | |
716 | ||
717 | nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list); | |
718 | } | |
719 | ||
d7b68016 MB |
720 | static int nvm_set_flags(struct nvm_geo *geo, struct nvm_rq *rqd) |
721 | { | |
722 | int flags = 0; | |
723 | ||
724 | if (geo->version == NVM_OCSSD_SPEC_20) | |
725 | return 0; | |
726 | ||
727 | if (rqd->is_seq) | |
728 | flags |= geo->pln_mode >> 1; | |
729 | ||
730 | if (rqd->opcode == NVM_OP_PREAD) | |
731 | flags |= (NVM_IO_SCRAMBLE_ENABLE | NVM_IO_SUSPEND); | |
732 | else if (rqd->opcode == NVM_OP_PWRITE) | |
733 | flags |= NVM_IO_SCRAMBLE_ENABLE; | |
734 | ||
735 | return flags; | |
736 | } | |
737 | ||
48e5da72 | 738 | int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, void *buf) |
cd9e9808 | 739 | { |
8e53624d | 740 | struct nvm_dev *dev = tgt_dev->parent; |
3e505afb | 741 | int ret; |
8e53624d | 742 | |
ade69e24 MB |
743 | if (!dev->ops->submit_io) |
744 | return -ENODEV; | |
745 | ||
dab8ee9e | 746 | nvm_rq_tgt_to_dev(tgt_dev, rqd); |
ade69e24 MB |
747 | |
748 | rqd->dev = tgt_dev; | |
d7b68016 | 749 | rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd); |
3e505afb JG |
750 | |
751 | /* In case of error, fail with right address format */ | |
48e5da72 | 752 | ret = dev->ops->submit_io(dev, rqd, buf); |
3e505afb JG |
753 | if (ret) |
754 | nvm_rq_dev_to_tgt(tgt_dev, rqd); | |
755 | return ret; | |
cd9e9808 MB |
756 | } |
757 | EXPORT_SYMBOL(nvm_submit_io); | |
758 | ||
98d87f70 HH |
759 | static void nvm_sync_end_io(struct nvm_rq *rqd) |
760 | { | |
761 | struct completion *waiting = rqd->private; | |
762 | ||
763 | complete(waiting); | |
764 | } | |
765 | ||
48e5da72 HH |
766 | static int nvm_submit_io_wait(struct nvm_dev *dev, struct nvm_rq *rqd, |
767 | void *buf) | |
98d87f70 HH |
768 | { |
769 | DECLARE_COMPLETION_ONSTACK(wait); | |
770 | int ret = 0; | |
771 | ||
772 | rqd->end_io = nvm_sync_end_io; | |
773 | rqd->private = &wait; | |
774 | ||
48e5da72 | 775 | ret = dev->ops->submit_io(dev, rqd, buf); |
98d87f70 HH |
776 | if (ret) |
777 | return ret; | |
778 | ||
779 | wait_for_completion_io(&wait); | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
48e5da72 HH |
784 | int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, |
785 | void *buf) | |
cd9e9808 | 786 | { |
1a94b2d4 JG |
787 | struct nvm_dev *dev = tgt_dev->parent; |
788 | int ret; | |
789 | ||
98d87f70 | 790 | if (!dev->ops->submit_io) |
1a94b2d4 JG |
791 | return -ENODEV; |
792 | ||
793 | nvm_rq_tgt_to_dev(tgt_dev, rqd); | |
10995c3d | 794 | |
1a94b2d4 | 795 | rqd->dev = tgt_dev; |
d7b68016 | 796 | rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd); |
1a94b2d4 | 797 | |
48e5da72 | 798 | ret = nvm_submit_io_wait(dev, rqd, buf); |
1a94b2d4 JG |
799 | |
800 | return ret; | |
17912c49 | 801 | } |
1a94b2d4 | 802 | EXPORT_SYMBOL(nvm_submit_io_sync); |
10995c3d | 803 | |
06894efe | 804 | void nvm_end_io(struct nvm_rq *rqd) |
91276162 | 805 | { |
ade69e24 | 806 | struct nvm_tgt_dev *tgt_dev = rqd->dev; |
ade69e24 MB |
807 | |
808 | /* Convert address space */ | |
809 | if (tgt_dev) | |
dab8ee9e | 810 | nvm_rq_dev_to_tgt(tgt_dev, rqd); |
ade69e24 | 811 | |
06894efe MB |
812 | if (rqd->end_io) |
813 | rqd->end_io(rqd); | |
91276162 MB |
814 | } |
815 | EXPORT_SYMBOL(nvm_end_io); | |
816 | ||
aff3fb18 MB |
817 | static int nvm_submit_io_sync_raw(struct nvm_dev *dev, struct nvm_rq *rqd) |
818 | { | |
98d87f70 | 819 | if (!dev->ops->submit_io) |
aff3fb18 MB |
820 | return -ENODEV; |
821 | ||
98d87f70 | 822 | rqd->dev = NULL; |
aff3fb18 MB |
823 | rqd->flags = nvm_set_flags(&dev->geo, rqd); |
824 | ||
48e5da72 | 825 | return nvm_submit_io_wait(dev, rqd, NULL); |
aff3fb18 MB |
826 | } |
827 | ||
828 | static int nvm_bb_chunk_sense(struct nvm_dev *dev, struct ppa_addr ppa) | |
829 | { | |
830 | struct nvm_rq rqd = { NULL }; | |
831 | struct bio bio; | |
832 | struct bio_vec bio_vec; | |
833 | struct page *page; | |
834 | int ret; | |
835 | ||
836 | page = alloc_page(GFP_KERNEL); | |
837 | if (!page) | |
838 | return -ENOMEM; | |
839 | ||
840 | bio_init(&bio, &bio_vec, 1); | |
841 | bio_add_page(&bio, page, PAGE_SIZE, 0); | |
842 | bio_set_op_attrs(&bio, REQ_OP_READ, 0); | |
843 | ||
844 | rqd.bio = &bio; | |
845 | rqd.opcode = NVM_OP_PREAD; | |
846 | rqd.is_seq = 1; | |
847 | rqd.nr_ppas = 1; | |
848 | rqd.ppa_addr = generic_to_dev_addr(dev, ppa); | |
849 | ||
850 | ret = nvm_submit_io_sync_raw(dev, &rqd); | |
851 | if (ret) | |
852 | return ret; | |
853 | ||
854 | __free_page(page); | |
855 | ||
856 | return rqd.error; | |
857 | } | |
858 | ||
22e8c976 | 859 | /* |
aff3fb18 MB |
860 | * Scans a 1.2 chunk first and last page to determine if its state. |
861 | * If the chunk is found to be open, also scan it to update the write | |
862 | * pointer. | |
22e8c976 | 863 | */ |
aff3fb18 MB |
864 | static int nvm_bb_chunk_scan(struct nvm_dev *dev, struct ppa_addr ppa, |
865 | struct nvm_chk_meta *meta) | |
22e8c976 | 866 | { |
8e79b5cb | 867 | struct nvm_geo *geo = &dev->geo; |
aff3fb18 | 868 | int ret, pg, pl; |
22e8c976 | 869 | |
aff3fb18 MB |
870 | /* sense first page */ |
871 | ret = nvm_bb_chunk_sense(dev, ppa); | |
872 | if (ret < 0) /* io error */ | |
873 | return ret; | |
874 | else if (ret == 0) /* valid data */ | |
875 | meta->state = NVM_CHK_ST_OPEN; | |
876 | else if (ret > 0) { | |
877 | /* | |
878 | * If empty page, the chunk is free, else it is an | |
879 | * actual io error. In that case, mark it offline. | |
880 | */ | |
881 | switch (ret) { | |
882 | case NVM_RSP_ERR_EMPTYPAGE: | |
883 | meta->state = NVM_CHK_ST_FREE; | |
884 | return 0; | |
885 | case NVM_RSP_ERR_FAILCRC: | |
886 | case NVM_RSP_ERR_FAILECC: | |
887 | case NVM_RSP_WARN_HIGHECC: | |
888 | meta->state = NVM_CHK_ST_OPEN; | |
889 | goto scan; | |
890 | default: | |
891 | return -ret; /* other io error */ | |
892 | } | |
893 | } | |
894 | ||
895 | /* sense last page */ | |
896 | ppa.g.pg = geo->num_pg - 1; | |
897 | ppa.g.pl = geo->num_pln - 1; | |
898 | ||
899 | ret = nvm_bb_chunk_sense(dev, ppa); | |
900 | if (ret < 0) /* io error */ | |
901 | return ret; | |
902 | else if (ret == 0) { /* Chunk fully written */ | |
903 | meta->state = NVM_CHK_ST_CLOSED; | |
904 | meta->wp = geo->clba; | |
905 | return 0; | |
906 | } else if (ret > 0) { | |
907 | switch (ret) { | |
908 | case NVM_RSP_ERR_EMPTYPAGE: | |
909 | case NVM_RSP_ERR_FAILCRC: | |
910 | case NVM_RSP_ERR_FAILECC: | |
911 | case NVM_RSP_WARN_HIGHECC: | |
912 | meta->state = NVM_CHK_ST_OPEN; | |
913 | break; | |
914 | default: | |
915 | return -ret; /* other io error */ | |
916 | } | |
917 | } | |
918 | ||
919 | scan: | |
920 | /* | |
921 | * chunk is open, we scan sequentially to update the write pointer. | |
922 | * We make the assumption that targets write data across all planes | |
923 | * before moving to the next page. | |
924 | */ | |
925 | for (pg = 0; pg < geo->num_pg; pg++) { | |
926 | for (pl = 0; pl < geo->num_pln; pl++) { | |
927 | ppa.g.pg = pg; | |
928 | ppa.g.pl = pl; | |
929 | ||
930 | ret = nvm_bb_chunk_sense(dev, ppa); | |
931 | if (ret < 0) /* io error */ | |
932 | return ret; | |
933 | else if (ret == 0) { | |
934 | meta->wp += geo->ws_min; | |
935 | } else if (ret > 0) { | |
936 | switch (ret) { | |
937 | case NVM_RSP_ERR_EMPTYPAGE: | |
938 | return 0; | |
939 | case NVM_RSP_ERR_FAILCRC: | |
940 | case NVM_RSP_ERR_FAILECC: | |
941 | case NVM_RSP_WARN_HIGHECC: | |
942 | meta->wp += geo->ws_min; | |
943 | break; | |
944 | default: | |
945 | return -ret; /* other io error */ | |
946 | } | |
947 | } | |
948 | } | |
949 | } | |
950 | ||
951 | return 0; | |
952 | } | |
953 | ||
954 | /* | |
955 | * folds a bad block list from its plane representation to its | |
956 | * chunk representation. | |
957 | * | |
958 | * If any of the planes status are bad or grown bad, the chunk is marked | |
959 | * offline. If not bad, the first plane state acts as the chunk state. | |
960 | */ | |
961 | static int nvm_bb_to_chunk(struct nvm_dev *dev, struct ppa_addr ppa, | |
962 | u8 *blks, int nr_blks, struct nvm_chk_meta *meta) | |
963 | { | |
964 | struct nvm_geo *geo = &dev->geo; | |
965 | int ret, blk, pl, offset, blktype; | |
22e8c976 | 966 | |
a40afad9 JG |
967 | for (blk = 0; blk < geo->num_chk; blk++) { |
968 | offset = blk * geo->pln_mode; | |
22e8c976 MB |
969 | blktype = blks[offset]; |
970 | ||
a40afad9 | 971 | for (pl = 0; pl < geo->pln_mode; pl++) { |
22e8c976 MB |
972 | if (blks[offset + pl] & |
973 | (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) { | |
974 | blktype = blks[offset + pl]; | |
975 | break; | |
976 | } | |
977 | } | |
978 | ||
aff3fb18 MB |
979 | ppa.g.blk = blk; |
980 | ||
981 | meta->wp = 0; | |
982 | meta->type = NVM_CHK_TP_W_SEQ; | |
983 | meta->wi = 0; | |
984 | meta->slba = generic_to_dev_addr(dev, ppa).ppa; | |
985 | meta->cnlb = dev->geo.clba; | |
986 | ||
987 | if (blktype == NVM_BLK_T_FREE) { | |
988 | ret = nvm_bb_chunk_scan(dev, ppa, meta); | |
989 | if (ret) | |
990 | return ret; | |
991 | } else { | |
992 | meta->state = NVM_CHK_ST_OFFLINE; | |
993 | } | |
994 | ||
995 | meta++; | |
22e8c976 MB |
996 | } |
997 | ||
aff3fb18 | 998 | return 0; |
22e8c976 | 999 | } |
22e8c976 | 1000 | |
aff3fb18 MB |
1001 | static int nvm_get_bb_meta(struct nvm_dev *dev, sector_t slba, |
1002 | int nchks, struct nvm_chk_meta *meta) | |
1003 | { | |
1004 | struct nvm_geo *geo = &dev->geo; | |
1005 | struct ppa_addr ppa; | |
1006 | u8 *blks; | |
1007 | int ch, lun, nr_blks; | |
55e58c5e | 1008 | int ret = 0; |
aff3fb18 MB |
1009 | |
1010 | ppa.ppa = slba; | |
1011 | ppa = dev_to_generic_addr(dev, ppa); | |
1012 | ||
1013 | if (ppa.g.blk != 0) | |
1014 | return -EINVAL; | |
1015 | ||
1016 | if ((nchks % geo->num_chk) != 0) | |
1017 | return -EINVAL; | |
1018 | ||
1019 | nr_blks = geo->num_chk * geo->pln_mode; | |
1020 | ||
1021 | blks = kmalloc(nr_blks, GFP_KERNEL); | |
1022 | if (!blks) | |
1023 | return -ENOMEM; | |
1024 | ||
1025 | for (ch = ppa.g.ch; ch < geo->num_ch; ch++) { | |
1026 | for (lun = ppa.g.lun; lun < geo->num_lun; lun++) { | |
1027 | struct ppa_addr ppa_gen, ppa_dev; | |
1028 | ||
1029 | if (!nchks) | |
1030 | goto done; | |
1031 | ||
1032 | ppa_gen.ppa = 0; | |
1033 | ppa_gen.g.ch = ch; | |
1034 | ppa_gen.g.lun = lun; | |
1035 | ppa_dev = generic_to_dev_addr(dev, ppa_gen); | |
1036 | ||
1037 | ret = dev->ops->get_bb_tbl(dev, ppa_dev, blks); | |
1038 | if (ret) | |
1039 | goto done; | |
1040 | ||
1041 | ret = nvm_bb_to_chunk(dev, ppa_gen, blks, nr_blks, | |
1042 | meta); | |
1043 | if (ret) | |
1044 | goto done; | |
1045 | ||
1046 | meta += geo->num_chk; | |
1047 | nchks -= geo->num_chk; | |
1048 | } | |
1049 | } | |
1050 | done: | |
1051 | kfree(blks); | |
1052 | return ret; | |
1053 | } | |
1054 | ||
1055 | int nvm_get_chunk_meta(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa, | |
1056 | int nchks, struct nvm_chk_meta *meta) | |
333ba053 | 1057 | { |
8f4fe008 MB |
1058 | struct nvm_dev *dev = tgt_dev->parent; |
1059 | ||
dab8ee9e | 1060 | nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1); |
333ba053 | 1061 | |
aff3fb18 MB |
1062 | if (dev->geo.version == NVM_OCSSD_SPEC_12) |
1063 | return nvm_get_bb_meta(dev, (sector_t)ppa.ppa, nchks, meta); | |
1064 | ||
1065 | return dev->ops->get_chk_meta(dev, (sector_t)ppa.ppa, nchks, meta); | |
1066 | } | |
1067 | EXPORT_SYMBOL_GPL(nvm_get_chunk_meta); | |
1068 | ||
1069 | int nvm_set_chunk_meta(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, | |
1070 | int nr_ppas, int type) | |
1071 | { | |
1072 | struct nvm_dev *dev = tgt_dev->parent; | |
1073 | struct nvm_rq rqd; | |
1074 | int ret; | |
1075 | ||
1076 | if (dev->geo.version == NVM_OCSSD_SPEC_20) | |
1077 | return 0; | |
1078 | ||
1079 | if (nr_ppas > NVM_MAX_VLBA) { | |
43db059e | 1080 | pr_err("unable to update all blocks atomically\n"); |
aff3fb18 MB |
1081 | return -EINVAL; |
1082 | } | |
1083 | ||
1084 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
1085 | ||
1086 | nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas); | |
1087 | nvm_rq_tgt_to_dev(tgt_dev, &rqd); | |
1088 | ||
1089 | ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type); | |
1090 | nvm_free_rqd_ppalist(tgt_dev, &rqd); | |
1091 | if (ret) | |
1092 | return -EINVAL; | |
1093 | ||
1094 | return 0; | |
333ba053 | 1095 | } |
aff3fb18 | 1096 | EXPORT_SYMBOL_GPL(nvm_set_chunk_meta); |
333ba053 | 1097 | |
cd9e9808 MB |
1098 | static int nvm_core_init(struct nvm_dev *dev) |
1099 | { | |
8e79b5cb | 1100 | struct nvm_geo *geo = &dev->geo; |
7f7c5d03 | 1101 | int ret; |
cd9e9808 | 1102 | |
fae7fae4 | 1103 | dev->lun_map = kcalloc(BITS_TO_LONGS(geo->all_luns), |
da1e2849 WT |
1104 | sizeof(unsigned long), GFP_KERNEL); |
1105 | if (!dev->lun_map) | |
1106 | return -ENOMEM; | |
7f7c5d03 | 1107 | |
ade69e24 MB |
1108 | INIT_LIST_HEAD(&dev->area_list); |
1109 | INIT_LIST_HEAD(&dev->targets); | |
e3eb3799 | 1110 | mutex_init(&dev->mlock); |
4c9dacb8 | 1111 | spin_lock_init(&dev->lock); |
cd9e9808 | 1112 | |
ade69e24 MB |
1113 | ret = nvm_register_map(dev); |
1114 | if (ret) | |
1115 | goto err_fmtype; | |
ac81bfa9 | 1116 | |
cd9e9808 | 1117 | return 0; |
7f7c5d03 MB |
1118 | err_fmtype: |
1119 | kfree(dev->lun_map); | |
1120 | return ret; | |
cd9e9808 MB |
1121 | } |
1122 | ||
e69397ea | 1123 | static void nvm_free(struct kref *ref) |
cd9e9808 | 1124 | { |
e69397ea | 1125 | struct nvm_dev *dev = container_of(ref, struct nvm_dev, ref); |
cd9e9808 | 1126 | |
40267efd SL |
1127 | if (dev->dma_pool) |
1128 | dev->ops->destroy_dma_pool(dev->dma_pool); | |
1129 | ||
e69397ea IK |
1130 | if (dev->rmap) |
1131 | nvm_unregister_map(dev); | |
1132 | ||
7f7c5d03 | 1133 | kfree(dev->lun_map); |
40267efd | 1134 | kfree(dev); |
cd9e9808 MB |
1135 | } |
1136 | ||
1137 | static int nvm_init(struct nvm_dev *dev) | |
1138 | { | |
8e79b5cb | 1139 | struct nvm_geo *geo = &dev->geo; |
480fc0db | 1140 | int ret = -EINVAL; |
cd9e9808 | 1141 | |
e46f4e48 | 1142 | if (dev->ops->identity(dev)) { |
43db059e | 1143 | pr_err("device could not be identified\n"); |
cd9e9808 MB |
1144 | goto err; |
1145 | } | |
1146 | ||
43db059e MI |
1147 | pr_debug("ver:%u.%u nvm_vendor:%x\n", geo->major_ver_id, |
1148 | geo->minor_ver_id, geo->vmnt); | |
cd9e9808 | 1149 | |
cd9e9808 MB |
1150 | ret = nvm_core_init(dev); |
1151 | if (ret) { | |
43db059e | 1152 | pr_err("could not initialize core structures.\n"); |
cd9e9808 MB |
1153 | goto err; |
1154 | } | |
1155 | ||
43db059e | 1156 | pr_info("registered %s [%u/%u/%u/%u/%u]\n", |
a40afad9 JG |
1157 | dev->name, dev->geo.ws_min, dev->geo.ws_opt, |
1158 | dev->geo.num_chk, dev->geo.all_luns, | |
1159 | dev->geo.num_ch); | |
cd9e9808 MB |
1160 | return 0; |
1161 | err: | |
43db059e | 1162 | pr_err("failed to initialize nvm\n"); |
cd9e9808 MB |
1163 | return ret; |
1164 | } | |
1165 | ||
b0b4e09c | 1166 | struct nvm_dev *nvm_alloc_dev(int node) |
cd9e9808 | 1167 | { |
e69397ea IK |
1168 | struct nvm_dev *dev; |
1169 | ||
1170 | dev = kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node); | |
1171 | if (dev) | |
1172 | kref_init(&dev->ref); | |
1173 | ||
1174 | return dev; | |
cd9e9808 | 1175 | } |
b0b4e09c | 1176 | EXPORT_SYMBOL(nvm_alloc_dev); |
cd9e9808 | 1177 | |
b0b4e09c | 1178 | int nvm_register(struct nvm_dev *dev) |
cd9e9808 | 1179 | { |
24828d05 | 1180 | int ret, exp_pool_size; |
cd9e9808 | 1181 | |
e69397ea IK |
1182 | if (!dev->q || !dev->ops) { |
1183 | kref_put(&dev->ref, nvm_free); | |
ade69e24 | 1184 | return -EINVAL; |
e69397ea | 1185 | } |
cd9e9808 | 1186 | |
85136c01 | 1187 | ret = nvm_init(dev); |
e69397ea IK |
1188 | if (ret) { |
1189 | kref_put(&dev->ref, nvm_free); | |
85136c01 | 1190 | return ret; |
e69397ea | 1191 | } |
85136c01 | 1192 | |
24828d05 IK |
1193 | exp_pool_size = max_t(int, PAGE_SIZE, |
1194 | (NVM_MAX_VLBA * (sizeof(u64) + dev->geo.sos))); | |
1195 | exp_pool_size = round_up(exp_pool_size, PAGE_SIZE); | |
1196 | ||
1197 | dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist", | |
1198 | exp_pool_size); | |
89a09c56 | 1199 | if (!dev->dma_pool) { |
43db059e | 1200 | pr_err("could not create dma pool\n"); |
e69397ea | 1201 | kref_put(&dev->ref, nvm_free); |
89a09c56 | 1202 | return -ENOMEM; |
cd9e9808 MB |
1203 | } |
1204 | ||
762796bc | 1205 | /* register device with a supported media manager */ |
edad2e66 MB |
1206 | down_write(&nvm_lock); |
1207 | list_add(&dev->devices, &nvm_devices); | |
1208 | up_write(&nvm_lock); | |
1209 | ||
cd9e9808 | 1210 | return 0; |
cd9e9808 MB |
1211 | } |
1212 | EXPORT_SYMBOL(nvm_register); | |
1213 | ||
b0b4e09c | 1214 | void nvm_unregister(struct nvm_dev *dev) |
cd9e9808 | 1215 | { |
ade69e24 MB |
1216 | struct nvm_target *t, *tmp; |
1217 | ||
1218 | mutex_lock(&dev->mlock); | |
1219 | list_for_each_entry_safe(t, tmp, &dev->targets, list) { | |
1220 | if (t->dev->parent != dev) | |
1221 | continue; | |
a7c9e910 | 1222 | __nvm_remove_target(t, false); |
e69397ea | 1223 | kref_put(&dev->ref, nvm_free); |
ade69e24 MB |
1224 | } |
1225 | mutex_unlock(&dev->mlock); | |
1226 | ||
d0a712ce | 1227 | down_write(&nvm_lock); |
cd9e9808 MB |
1228 | list_del(&dev->devices); |
1229 | up_write(&nvm_lock); | |
c1480ad5 | 1230 | |
e69397ea | 1231 | kref_put(&dev->ref, nvm_free); |
cd9e9808 MB |
1232 | } |
1233 | EXPORT_SYMBOL(nvm_unregister); | |
1234 | ||
cd9e9808 MB |
1235 | static int __nvm_configure_create(struct nvm_ioctl_create *create) |
1236 | { | |
1237 | struct nvm_dev *dev; | |
e69397ea | 1238 | int ret; |
cd9e9808 | 1239 | |
d0a712ce | 1240 | down_write(&nvm_lock); |
cd9e9808 | 1241 | dev = nvm_find_nvm_dev(create->dev); |
d0a712ce | 1242 | up_write(&nvm_lock); |
b76eb20b | 1243 | |
cd9e9808 | 1244 | if (!dev) { |
43db059e | 1245 | pr_err("device not found\n"); |
cd9e9808 MB |
1246 | return -EINVAL; |
1247 | } | |
1248 | ||
e69397ea IK |
1249 | kref_get(&dev->ref); |
1250 | ret = nvm_create_tgt(dev, create); | |
1251 | if (ret) | |
1252 | kref_put(&dev->ref, nvm_free); | |
1253 | ||
1254 | return ret; | |
cd9e9808 MB |
1255 | } |
1256 | ||
cd9e9808 MB |
1257 | static long nvm_ioctl_info(struct file *file, void __user *arg) |
1258 | { | |
1259 | struct nvm_ioctl_info *info; | |
1260 | struct nvm_tgt_type *tt; | |
1261 | int tgt_iter = 0; | |
1262 | ||
cd9e9808 MB |
1263 | info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); |
1264 | if (IS_ERR(info)) | |
1265 | return -EFAULT; | |
1266 | ||
1267 | info->version[0] = NVM_VERSION_MAJOR; | |
1268 | info->version[1] = NVM_VERSION_MINOR; | |
1269 | info->version[2] = NVM_VERSION_PATCH; | |
1270 | ||
88d31ea2 | 1271 | down_write(&nvm_tgtt_lock); |
6063fe39 | 1272 | list_for_each_entry(tt, &nvm_tgt_types, list) { |
cd9e9808 MB |
1273 | struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter]; |
1274 | ||
1275 | tgt->version[0] = tt->version[0]; | |
1276 | tgt->version[1] = tt->version[1]; | |
1277 | tgt->version[2] = tt->version[2]; | |
1278 | strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX); | |
1279 | ||
1280 | tgt_iter++; | |
1281 | } | |
1282 | ||
1283 | info->tgtsize = tgt_iter; | |
88d31ea2 | 1284 | up_write(&nvm_tgtt_lock); |
cd9e9808 | 1285 | |
76e25081 SM |
1286 | if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) { |
1287 | kfree(info); | |
cd9e9808 | 1288 | return -EFAULT; |
76e25081 | 1289 | } |
cd9e9808 MB |
1290 | |
1291 | kfree(info); | |
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | static long nvm_ioctl_get_devices(struct file *file, void __user *arg) | |
1296 | { | |
1297 | struct nvm_ioctl_get_devices *devices; | |
1298 | struct nvm_dev *dev; | |
1299 | int i = 0; | |
1300 | ||
cd9e9808 MB |
1301 | devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); |
1302 | if (!devices) | |
1303 | return -ENOMEM; | |
1304 | ||
1305 | down_write(&nvm_lock); | |
1306 | list_for_each_entry(dev, &nvm_devices, devices) { | |
1307 | struct nvm_ioctl_device_info *info = &devices->info[i]; | |
1308 | ||
6eb08245 | 1309 | strlcpy(info->devname, dev->name, sizeof(info->devname)); |
cd9e9808 | 1310 | |
ade69e24 MB |
1311 | /* kept for compatibility */ |
1312 | info->bmversion[0] = 1; | |
1313 | info->bmversion[1] = 0; | |
1314 | info->bmversion[2] = 0; | |
6eb08245 | 1315 | strlcpy(info->bmname, "gennvm", sizeof(info->bmname)); |
cd9e9808 | 1316 | i++; |
ade69e24 | 1317 | |
cd9e9808 | 1318 | if (i > 31) { |
43db059e | 1319 | pr_err("max 31 devices can be reported.\n"); |
cd9e9808 MB |
1320 | break; |
1321 | } | |
1322 | } | |
1323 | up_write(&nvm_lock); | |
1324 | ||
1325 | devices->nr_devices = i; | |
1326 | ||
76e25081 SM |
1327 | if (copy_to_user(arg, devices, |
1328 | sizeof(struct nvm_ioctl_get_devices))) { | |
1329 | kfree(devices); | |
cd9e9808 | 1330 | return -EFAULT; |
76e25081 | 1331 | } |
cd9e9808 MB |
1332 | |
1333 | kfree(devices); | |
1334 | return 0; | |
1335 | } | |
1336 | ||
1337 | static long nvm_ioctl_dev_create(struct file *file, void __user *arg) | |
1338 | { | |
1339 | struct nvm_ioctl_create create; | |
1340 | ||
cd9e9808 MB |
1341 | if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) |
1342 | return -EFAULT; | |
1343 | ||
e5392739 JG |
1344 | if (create.conf.type == NVM_CONFIG_TYPE_EXTENDED && |
1345 | create.conf.e.rsv != 0) { | |
43db059e | 1346 | pr_err("reserved config field in use\n"); |
e5392739 JG |
1347 | return -EINVAL; |
1348 | } | |
1349 | ||
cd9e9808 MB |
1350 | create.dev[DISK_NAME_LEN - 1] = '\0'; |
1351 | create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0'; | |
1352 | create.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1353 | ||
1354 | if (create.flags != 0) { | |
4af3f75d JG |
1355 | __u32 flags = create.flags; |
1356 | ||
1357 | /* Check for valid flags */ | |
1358 | if (flags & NVM_TARGET_FACTORY) | |
1359 | flags &= ~NVM_TARGET_FACTORY; | |
1360 | ||
1361 | if (flags) { | |
43db059e | 1362 | pr_err("flag not supported\n"); |
4af3f75d JG |
1363 | return -EINVAL; |
1364 | } | |
cd9e9808 MB |
1365 | } |
1366 | ||
1367 | return __nvm_configure_create(&create); | |
1368 | } | |
1369 | ||
1370 | static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) | |
1371 | { | |
1372 | struct nvm_ioctl_remove remove; | |
1373 | ||
cd9e9808 MB |
1374 | if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) |
1375 | return -EFAULT; | |
1376 | ||
1377 | remove.tgtname[DISK_NAME_LEN - 1] = '\0'; | |
1378 | ||
1379 | if (remove.flags != 0) { | |
43db059e | 1380 | pr_err("no flags supported\n"); |
cd9e9808 MB |
1381 | return -EINVAL; |
1382 | } | |
1383 | ||
843f2edb | 1384 | return nvm_remove_tgt(&remove); |
cd9e9808 MB |
1385 | } |
1386 | ||
ade69e24 | 1387 | /* kept for compatibility reasons */ |
55696154 MB |
1388 | static long nvm_ioctl_dev_init(struct file *file, void __user *arg) |
1389 | { | |
1390 | struct nvm_ioctl_dev_init init; | |
1391 | ||
55696154 MB |
1392 | if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) |
1393 | return -EFAULT; | |
1394 | ||
1395 | if (init.flags != 0) { | |
43db059e | 1396 | pr_err("no flags supported\n"); |
55696154 MB |
1397 | return -EINVAL; |
1398 | } | |
1399 | ||
ade69e24 | 1400 | return 0; |
55696154 MB |
1401 | } |
1402 | ||
ade69e24 | 1403 | /* Kept for compatibility reasons */ |
8b4970c4 MB |
1404 | static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) |
1405 | { | |
1406 | struct nvm_ioctl_dev_factory fact; | |
8b4970c4 | 1407 | |
8b4970c4 MB |
1408 | if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) |
1409 | return -EFAULT; | |
1410 | ||
1411 | fact.dev[DISK_NAME_LEN - 1] = '\0'; | |
1412 | ||
1413 | if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1)) | |
1414 | return -EINVAL; | |
1415 | ||
bf643185 | 1416 | return 0; |
8b4970c4 MB |
1417 | } |
1418 | ||
cd9e9808 MB |
1419 | static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) |
1420 | { | |
1421 | void __user *argp = (void __user *)arg; | |
1422 | ||
40f962d7 JT |
1423 | if (!capable(CAP_SYS_ADMIN)) |
1424 | return -EPERM; | |
1425 | ||
cd9e9808 MB |
1426 | switch (cmd) { |
1427 | case NVM_INFO: | |
1428 | return nvm_ioctl_info(file, argp); | |
1429 | case NVM_GET_DEVICES: | |
1430 | return nvm_ioctl_get_devices(file, argp); | |
1431 | case NVM_DEV_CREATE: | |
1432 | return nvm_ioctl_dev_create(file, argp); | |
1433 | case NVM_DEV_REMOVE: | |
1434 | return nvm_ioctl_dev_remove(file, argp); | |
55696154 MB |
1435 | case NVM_DEV_INIT: |
1436 | return nvm_ioctl_dev_init(file, argp); | |
8b4970c4 MB |
1437 | case NVM_DEV_FACTORY: |
1438 | return nvm_ioctl_dev_factory(file, argp); | |
cd9e9808 MB |
1439 | } |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | static const struct file_operations _ctl_fops = { | |
1444 | .open = nonseekable_open, | |
1445 | .unlocked_ioctl = nvm_ctl_ioctl, | |
1446 | .owner = THIS_MODULE, | |
1447 | .llseek = noop_llseek, | |
1448 | }; | |
1449 | ||
1450 | static struct miscdevice _nvm_misc = { | |
1451 | .minor = MISC_DYNAMIC_MINOR, | |
1452 | .name = "lightnvm", | |
1453 | .nodename = "lightnvm/control", | |
1454 | .fops = &_ctl_fops, | |
1455 | }; | |
389b2a1c | 1456 | builtin_misc_device(_nvm_misc); |