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1 | /* |
2 | * Copyright (C) 2015 Matias Bjorling. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License version | |
6 | * 2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; see the file COPYING. If not, write to | |
15 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, | |
16 | * USA. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/lightnvm.h> | |
21 | ||
22 | #define MAX_SYSBLKS 3 /* remember to update mapping scheme on change */ | |
23 | #define MAX_BLKS_PR_SYSBLK 2 /* 2 blks with 256 pages and 3000 erases | |
24 | * enables ~1.5M updates per sysblk unit | |
25 | */ | |
26 | ||
27 | struct sysblk_scan { | |
28 | /* A row is a collection of flash blocks for a system block. */ | |
29 | int nr_rows; | |
30 | int row; | |
31 | int act_blk[MAX_SYSBLKS]; | |
32 | ||
33 | int nr_ppas; | |
34 | struct ppa_addr ppas[MAX_SYSBLKS * MAX_BLKS_PR_SYSBLK];/* all sysblks */ | |
35 | }; | |
36 | ||
37 | static inline int scan_ppa_idx(int row, int blkid) | |
38 | { | |
39 | return (row * MAX_BLKS_PR_SYSBLK) + blkid; | |
40 | } | |
41 | ||
42 | void nvm_sysblk_to_cpu(struct nvm_sb_info *info, struct nvm_system_block *sb) | |
43 | { | |
44 | info->seqnr = be32_to_cpu(sb->seqnr); | |
45 | info->erase_cnt = be32_to_cpu(sb->erase_cnt); | |
46 | info->version = be16_to_cpu(sb->version); | |
47 | strncpy(info->mmtype, sb->mmtype, NVM_MMTYPE_LEN); | |
48 | info->fs_ppa.ppa = be64_to_cpu(sb->fs_ppa); | |
49 | } | |
50 | ||
51 | void nvm_cpu_to_sysblk(struct nvm_system_block *sb, struct nvm_sb_info *info) | |
52 | { | |
53 | sb->magic = cpu_to_be32(NVM_SYSBLK_MAGIC); | |
54 | sb->seqnr = cpu_to_be32(info->seqnr); | |
55 | sb->erase_cnt = cpu_to_be32(info->erase_cnt); | |
56 | sb->version = cpu_to_be16(info->version); | |
57 | strncpy(sb->mmtype, info->mmtype, NVM_MMTYPE_LEN); | |
58 | sb->fs_ppa = cpu_to_be64(info->fs_ppa.ppa); | |
59 | } | |
60 | ||
61 | static int nvm_setup_sysblks(struct nvm_dev *dev, struct ppa_addr *sysblk_ppas) | |
62 | { | |
63 | int nr_rows = min_t(int, MAX_SYSBLKS, dev->nr_chnls); | |
64 | int i; | |
65 | ||
66 | for (i = 0; i < nr_rows; i++) | |
67 | sysblk_ppas[i].ppa = 0; | |
68 | ||
69 | /* if possible, place sysblk at first channel, middle channel and last | |
70 | * channel of the device. If not, create only one or two sys blocks | |
71 | */ | |
72 | switch (dev->nr_chnls) { | |
73 | case 2: | |
74 | sysblk_ppas[1].g.ch = 1; | |
75 | /* fall-through */ | |
76 | case 1: | |
77 | sysblk_ppas[0].g.ch = 0; | |
78 | break; | |
79 | default: | |
80 | sysblk_ppas[0].g.ch = 0; | |
81 | sysblk_ppas[1].g.ch = dev->nr_chnls / 2; | |
82 | sysblk_ppas[2].g.ch = dev->nr_chnls - 1; | |
83 | break; | |
84 | } | |
85 | ||
86 | return nr_rows; | |
87 | } | |
88 | ||
89 | void nvm_setup_sysblk_scan(struct nvm_dev *dev, struct sysblk_scan *s, | |
90 | struct ppa_addr *sysblk_ppas) | |
91 | { | |
92 | memset(s, 0, sizeof(struct sysblk_scan)); | |
93 | s->nr_rows = nvm_setup_sysblks(dev, sysblk_ppas); | |
94 | } | |
95 | ||
96 | static int sysblk_get_host_blks(struct ppa_addr ppa, int nr_blks, u8 *blks, | |
97 | void *private) | |
98 | { | |
99 | struct sysblk_scan *s = private; | |
100 | int i, nr_sysblk = 0; | |
101 | ||
102 | for (i = 0; i < nr_blks; i++) { | |
103 | if (blks[i] != NVM_BLK_T_HOST) | |
104 | continue; | |
105 | ||
106 | if (s->nr_ppas == MAX_BLKS_PR_SYSBLK * MAX_SYSBLKS) { | |
107 | pr_err("nvm: too many host blks\n"); | |
108 | return -EINVAL; | |
109 | } | |
110 | ||
111 | ppa.g.blk = i; | |
112 | ||
113 | s->ppas[scan_ppa_idx(s->row, nr_sysblk)] = ppa; | |
114 | s->nr_ppas++; | |
115 | nr_sysblk++; | |
116 | } | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static int nvm_get_all_sysblks(struct nvm_dev *dev, struct sysblk_scan *s, | |
122 | struct ppa_addr *ppas, nvm_bb_update_fn *fn) | |
123 | { | |
124 | struct ppa_addr dppa; | |
125 | int i, ret; | |
126 | ||
127 | s->nr_ppas = 0; | |
128 | ||
129 | for (i = 0; i < s->nr_rows; i++) { | |
130 | dppa = generic_to_dev_addr(dev, ppas[i]); | |
131 | s->row = i; | |
132 | ||
133 | ret = dev->ops->get_bb_tbl(dev, dppa, dev->blks_per_lun, fn, s); | |
134 | if (ret) { | |
135 | pr_err("nvm: failed bb tbl for ppa (%u %u)\n", | |
136 | ppas[i].g.ch, | |
137 | ppas[i].g.blk); | |
138 | return ret; | |
139 | } | |
140 | } | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
145 | /* | |
146 | * scans a block for latest sysblk. | |
147 | * Returns: | |
148 | * 0 - newer sysblk not found. PPA is updated to latest page. | |
149 | * 1 - newer sysblk found and stored in *cur. PPA is updated to | |
150 | * next valid page. | |
151 | * <0- error. | |
152 | */ | |
153 | static int nvm_scan_block(struct nvm_dev *dev, struct ppa_addr *ppa, | |
154 | struct nvm_system_block *sblk) | |
155 | { | |
156 | struct nvm_system_block *cur; | |
157 | int pg, cursz, ret, found = 0; | |
158 | ||
159 | /* the full buffer for a flash page is allocated. Only the first of it | |
160 | * contains the system block information | |
161 | */ | |
162 | cursz = dev->sec_size * dev->sec_per_pg * dev->nr_planes; | |
163 | cur = kmalloc(cursz, GFP_KERNEL); | |
164 | if (!cur) | |
165 | return -ENOMEM; | |
166 | ||
167 | /* perform linear scan through the block */ | |
168 | for (pg = 0; pg < dev->lps_per_blk; pg++) { | |
169 | ppa->g.pg = ppa_to_slc(dev, pg); | |
170 | ||
171 | ret = nvm_submit_ppa(dev, ppa, 1, NVM_OP_PREAD, NVM_IO_SLC_MODE, | |
172 | cur, cursz); | |
173 | if (ret) { | |
174 | if (ret == NVM_RSP_ERR_EMPTYPAGE) { | |
175 | pr_debug("nvm: sysblk scan empty ppa (%u %u %u %u)\n", | |
176 | ppa->g.ch, | |
177 | ppa->g.lun, | |
178 | ppa->g.blk, | |
179 | ppa->g.pg); | |
180 | break; | |
181 | } | |
182 | pr_err("nvm: read failed (%x) for ppa (%u %u %u %u)", | |
183 | ret, | |
184 | ppa->g.ch, | |
185 | ppa->g.lun, | |
186 | ppa->g.blk, | |
187 | ppa->g.pg); | |
188 | break; /* if we can't read a page, continue to the | |
189 | * next blk | |
190 | */ | |
191 | } | |
192 | ||
193 | if (be32_to_cpu(cur->magic) != NVM_SYSBLK_MAGIC) { | |
194 | pr_debug("nvm: scan break for ppa (%u %u %u %u)\n", | |
195 | ppa->g.ch, | |
196 | ppa->g.lun, | |
197 | ppa->g.blk, | |
198 | ppa->g.pg); | |
199 | break; /* last valid page already found */ | |
200 | } | |
201 | ||
202 | if (be32_to_cpu(cur->seqnr) < be32_to_cpu(sblk->seqnr)) | |
203 | continue; | |
204 | ||
205 | memcpy(sblk, cur, sizeof(struct nvm_system_block)); | |
206 | found = 1; | |
207 | } | |
208 | ||
209 | kfree(cur); | |
210 | ||
211 | return found; | |
212 | } | |
213 | ||
214 | static int nvm_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s, int type) | |
215 | { | |
216 | struct nvm_rq rqd; | |
217 | int ret; | |
218 | ||
219 | if (s->nr_ppas > dev->ops->max_phys_sect) { | |
220 | pr_err("nvm: unable to update all sysblocks atomically\n"); | |
221 | return -EINVAL; | |
222 | } | |
223 | ||
224 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
225 | ||
226 | nvm_set_rqd_ppalist(dev, &rqd, s->ppas, s->nr_ppas); | |
227 | nvm_generic_to_addr_mode(dev, &rqd); | |
228 | ||
229 | ret = dev->ops->set_bb_tbl(dev, &rqd, type); | |
230 | nvm_free_rqd_ppalist(dev, &rqd); | |
231 | if (ret) { | |
232 | pr_err("nvm: sysblk failed bb mark\n"); | |
233 | return -EINVAL; | |
234 | } | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static int sysblk_get_free_blks(struct ppa_addr ppa, int nr_blks, u8 *blks, | |
240 | void *private) | |
241 | { | |
242 | struct sysblk_scan *s = private; | |
243 | struct ppa_addr *sppa; | |
244 | int i, blkid = 0; | |
245 | ||
246 | for (i = 0; i < nr_blks; i++) { | |
247 | if (blks[i] == NVM_BLK_T_HOST) | |
248 | return -EEXIST; | |
249 | ||
250 | if (blks[i] != NVM_BLK_T_FREE) | |
251 | continue; | |
252 | ||
253 | sppa = &s->ppas[scan_ppa_idx(s->row, blkid)]; | |
254 | sppa->g.ch = ppa.g.ch; | |
255 | sppa->g.lun = ppa.g.lun; | |
256 | sppa->g.blk = i; | |
257 | s->nr_ppas++; | |
258 | blkid++; | |
259 | ||
260 | pr_debug("nvm: use (%u %u %u) as sysblk\n", | |
261 | sppa->g.ch, sppa->g.lun, sppa->g.blk); | |
262 | if (blkid > MAX_BLKS_PR_SYSBLK - 1) | |
263 | return 0; | |
264 | } | |
265 | ||
266 | pr_err("nvm: sysblk failed get sysblk\n"); | |
267 | return -EINVAL; | |
268 | } | |
269 | ||
270 | static int nvm_write_and_verify(struct nvm_dev *dev, struct nvm_sb_info *info, | |
271 | struct sysblk_scan *s) | |
272 | { | |
273 | struct nvm_system_block nvmsb; | |
274 | void *buf; | |
275 | int i, sect, ret, bufsz; | |
276 | struct ppa_addr *ppas; | |
277 | ||
278 | nvm_cpu_to_sysblk(&nvmsb, info); | |
279 | ||
280 | /* buffer for flash page */ | |
281 | bufsz = dev->sec_size * dev->sec_per_pg * dev->nr_planes; | |
282 | buf = kzalloc(bufsz, GFP_KERNEL); | |
283 | if (!buf) | |
284 | return -ENOMEM; | |
285 | memcpy(buf, &nvmsb, sizeof(struct nvm_system_block)); | |
286 | ||
287 | ppas = kcalloc(dev->sec_per_pg, sizeof(struct ppa_addr), GFP_KERNEL); | |
288 | if (!ppas) { | |
289 | ret = -ENOMEM; | |
290 | goto err; | |
291 | } | |
292 | ||
293 | /* Write and verify */ | |
294 | for (i = 0; i < s->nr_rows; i++) { | |
295 | ppas[0] = s->ppas[scan_ppa_idx(i, s->act_blk[i])]; | |
296 | ||
297 | pr_debug("nvm: writing sysblk to ppa (%u %u %u %u)\n", | |
298 | ppas[0].g.ch, | |
299 | ppas[0].g.lun, | |
300 | ppas[0].g.blk, | |
301 | ppas[0].g.pg); | |
302 | ||
303 | /* Expand to all sectors within a flash page */ | |
304 | if (dev->sec_per_pg > 1) { | |
305 | for (sect = 1; sect < dev->sec_per_pg; sect++) { | |
306 | ppas[sect].ppa = ppas[0].ppa; | |
307 | ppas[sect].g.sec = sect; | |
308 | } | |
309 | } | |
310 | ||
311 | ret = nvm_submit_ppa(dev, ppas, dev->sec_per_pg, NVM_OP_PWRITE, | |
312 | NVM_IO_SLC_MODE, buf, bufsz); | |
313 | if (ret) { | |
314 | pr_err("nvm: sysblk failed program (%u %u %u)\n", | |
315 | ppas[0].g.ch, | |
316 | ppas[0].g.lun, | |
317 | ppas[0].g.blk); | |
318 | break; | |
319 | } | |
320 | ||
321 | ret = nvm_submit_ppa(dev, ppas, dev->sec_per_pg, NVM_OP_PREAD, | |
322 | NVM_IO_SLC_MODE, buf, bufsz); | |
323 | if (ret) { | |
324 | pr_err("nvm: sysblk failed read (%u %u %u)\n", | |
325 | ppas[0].g.ch, | |
326 | ppas[0].g.lun, | |
327 | ppas[0].g.blk); | |
328 | break; | |
329 | } | |
330 | ||
331 | if (memcmp(buf, &nvmsb, sizeof(struct nvm_system_block))) { | |
332 | pr_err("nvm: sysblk failed verify (%u %u %u)\n", | |
333 | ppas[0].g.ch, | |
334 | ppas[0].g.lun, | |
335 | ppas[0].g.blk); | |
336 | ret = -EINVAL; | |
337 | break; | |
338 | } | |
339 | } | |
340 | ||
341 | kfree(ppas); | |
342 | err: | |
343 | kfree(buf); | |
344 | ||
345 | return ret; | |
346 | } | |
347 | ||
348 | static int nvm_prepare_new_sysblks(struct nvm_dev *dev, struct sysblk_scan *s) | |
349 | { | |
350 | int i, ret; | |
351 | unsigned long nxt_blk; | |
352 | struct ppa_addr *ppa; | |
353 | ||
354 | for (i = 0; i < s->nr_rows; i++) { | |
355 | nxt_blk = (s->act_blk[i] + 1) % MAX_BLKS_PR_SYSBLK; | |
356 | ppa = &s->ppas[scan_ppa_idx(i, nxt_blk)]; | |
357 | ppa->g.pg = ppa_to_slc(dev, 0); | |
358 | ||
359 | ret = nvm_erase_ppa(dev, ppa, 1); | |
360 | if (ret) | |
361 | return ret; | |
362 | ||
363 | s->act_blk[i] = nxt_blk; | |
364 | } | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | int nvm_get_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info) | |
370 | { | |
371 | struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; | |
372 | struct sysblk_scan s; | |
373 | struct nvm_system_block *cur; | |
374 | int i, j, found = 0; | |
375 | int ret = -ENOMEM; | |
376 | ||
377 | /* | |
378 | * 1. setup sysblk locations | |
379 | * 2. get bad block list | |
380 | * 3. filter on host-specific (type 3) | |
381 | * 4. iterate through all and find the highest seq nr. | |
382 | * 5. return superblock information | |
383 | */ | |
384 | ||
385 | if (!dev->ops->get_bb_tbl) | |
386 | return -EINVAL; | |
387 | ||
388 | nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); | |
389 | ||
390 | mutex_lock(&dev->mlock); | |
391 | ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, sysblk_get_host_blks); | |
392 | if (ret) | |
393 | goto err_sysblk; | |
394 | ||
395 | /* no sysblocks initialized */ | |
396 | if (!s.nr_ppas) | |
397 | goto err_sysblk; | |
398 | ||
399 | cur = kzalloc(sizeof(struct nvm_system_block), GFP_KERNEL); | |
400 | if (!cur) | |
401 | goto err_sysblk; | |
402 | ||
403 | /* find the latest block across all sysblocks */ | |
404 | for (i = 0; i < s.nr_rows; i++) { | |
405 | for (j = 0; j < MAX_BLKS_PR_SYSBLK; j++) { | |
406 | struct ppa_addr ppa = s.ppas[scan_ppa_idx(i, j)]; | |
407 | ||
408 | ret = nvm_scan_block(dev, &ppa, cur); | |
409 | if (ret > 0) | |
410 | found = 1; | |
411 | else if (ret < 0) | |
412 | break; | |
413 | } | |
414 | } | |
415 | ||
416 | nvm_sysblk_to_cpu(info, cur); | |
417 | ||
418 | kfree(cur); | |
419 | err_sysblk: | |
420 | mutex_unlock(&dev->mlock); | |
421 | ||
422 | if (found) | |
423 | return 1; | |
424 | return ret; | |
425 | } | |
426 | ||
427 | int nvm_update_sysblock(struct nvm_dev *dev, struct nvm_sb_info *new) | |
428 | { | |
429 | /* 1. for each latest superblock | |
430 | * 2. if room | |
431 | * a. write new flash page entry with the updated information | |
432 | * 3. if no room | |
433 | * a. find next available block on lun (linear search) | |
434 | * if none, continue to next lun | |
435 | * if none at all, report error. also report that it wasn't | |
436 | * possible to write to all superblocks. | |
437 | * c. write data to block. | |
438 | */ | |
439 | struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; | |
440 | struct sysblk_scan s; | |
441 | struct nvm_system_block *cur; | |
442 | int i, j, ppaidx, found = 0; | |
443 | int ret = -ENOMEM; | |
444 | ||
445 | if (!dev->ops->get_bb_tbl) | |
446 | return -EINVAL; | |
447 | ||
448 | nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); | |
449 | ||
450 | mutex_lock(&dev->mlock); | |
451 | ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, sysblk_get_host_blks); | |
452 | if (ret) | |
453 | goto err_sysblk; | |
454 | ||
455 | cur = kzalloc(sizeof(struct nvm_system_block), GFP_KERNEL); | |
456 | if (!cur) | |
457 | goto err_sysblk; | |
458 | ||
459 | /* Get the latest sysblk for each sysblk row */ | |
460 | for (i = 0; i < s.nr_rows; i++) { | |
461 | found = 0; | |
462 | for (j = 0; j < MAX_BLKS_PR_SYSBLK; j++) { | |
463 | ppaidx = scan_ppa_idx(i, j); | |
464 | ret = nvm_scan_block(dev, &s.ppas[ppaidx], cur); | |
465 | if (ret > 0) { | |
466 | s.act_blk[i] = j; | |
467 | found = 1; | |
468 | } else if (ret < 0) | |
469 | break; | |
470 | } | |
471 | } | |
472 | ||
473 | if (!found) { | |
474 | pr_err("nvm: no valid sysblks found to update\n"); | |
475 | ret = -EINVAL; | |
476 | goto err_cur; | |
477 | } | |
478 | ||
479 | /* | |
480 | * All sysblocks found. Check that they have same page id in their flash | |
481 | * blocks | |
482 | */ | |
483 | for (i = 1; i < s.nr_rows; i++) { | |
484 | struct ppa_addr l = s.ppas[scan_ppa_idx(0, s.act_blk[0])]; | |
485 | struct ppa_addr r = s.ppas[scan_ppa_idx(i, s.act_blk[i])]; | |
486 | ||
487 | if (l.g.pg != r.g.pg) { | |
488 | pr_err("nvm: sysblks not on same page. Previous update failed.\n"); | |
489 | ret = -EINVAL; | |
490 | goto err_cur; | |
491 | } | |
492 | } | |
493 | ||
494 | /* | |
495 | * Check that there haven't been another update to the seqnr since we | |
496 | * began | |
497 | */ | |
498 | if ((new->seqnr - 1) != be32_to_cpu(cur->seqnr)) { | |
499 | pr_err("nvm: seq is not sequential\n"); | |
500 | ret = -EINVAL; | |
501 | goto err_cur; | |
502 | } | |
503 | ||
504 | /* | |
505 | * When all pages in a block has been written, a new block is selected | |
506 | * and writing is performed on the new block. | |
507 | */ | |
508 | if (s.ppas[scan_ppa_idx(0, s.act_blk[0])].g.pg == | |
509 | dev->lps_per_blk - 1) { | |
510 | ret = nvm_prepare_new_sysblks(dev, &s); | |
511 | if (ret) | |
512 | goto err_cur; | |
513 | } | |
514 | ||
515 | ret = nvm_write_and_verify(dev, new, &s); | |
516 | err_cur: | |
517 | kfree(cur); | |
518 | err_sysblk: | |
519 | mutex_unlock(&dev->mlock); | |
520 | ||
521 | return ret; | |
522 | } | |
523 | ||
524 | int nvm_init_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info) | |
525 | { | |
526 | struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; | |
527 | struct sysblk_scan s; | |
528 | int ret; | |
529 | ||
530 | /* | |
531 | * 1. select master blocks and select first available blks | |
532 | * 2. get bad block list | |
533 | * 3. mark MAX_SYSBLKS block as host-based device allocated. | |
534 | * 4. write and verify data to block | |
535 | */ | |
536 | ||
537 | if (!dev->ops->get_bb_tbl || !dev->ops->set_bb_tbl) | |
538 | return -EINVAL; | |
539 | ||
540 | if (!(dev->mccap & NVM_ID_CAP_SLC) || !dev->lps_per_blk) { | |
541 | pr_err("nvm: memory does not support SLC access\n"); | |
542 | return -EINVAL; | |
543 | } | |
544 | ||
545 | /* Index all sysblocks and mark them as host-driven */ | |
546 | nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); | |
547 | ||
548 | mutex_lock(&dev->mlock); | |
549 | ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, sysblk_get_free_blks); | |
550 | if (ret) | |
551 | goto err_mark; | |
552 | ||
553 | ret = nvm_set_bb_tbl(dev, &s, NVM_BLK_T_HOST); | |
554 | if (ret) | |
555 | goto err_mark; | |
556 | ||
557 | /* Write to the first block of each row */ | |
558 | ret = nvm_write_and_verify(dev, info, &s); | |
559 | err_mark: | |
560 | mutex_unlock(&dev->mlock); | |
561 | return ret; | |
562 | } | |
8b4970c4 MB |
563 | |
564 | struct factory_blks { | |
565 | struct nvm_dev *dev; | |
566 | int flags; | |
567 | unsigned long *blks; | |
568 | }; | |
569 | ||
570 | static int factory_nblks(int nblks) | |
571 | { | |
572 | /* Round up to nearest BITS_PER_LONG */ | |
573 | return (nblks + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1); | |
574 | } | |
575 | ||
576 | static unsigned int factory_blk_offset(struct nvm_dev *dev, int ch, int lun) | |
577 | { | |
578 | int nblks = factory_nblks(dev->blks_per_lun); | |
579 | ||
580 | return ((ch * dev->luns_per_chnl * nblks) + (lun * nblks)) / | |
581 | BITS_PER_LONG; | |
582 | } | |
583 | ||
584 | static int nvm_factory_blks(struct ppa_addr ppa, int nr_blks, u8 *blks, | |
585 | void *private) | |
586 | { | |
587 | struct factory_blks *f = private; | |
588 | struct nvm_dev *dev = f->dev; | |
589 | int i, lunoff; | |
590 | ||
591 | lunoff = factory_blk_offset(dev, ppa.g.ch, ppa.g.lun); | |
592 | ||
593 | /* non-set bits correspond to the block must be erased */ | |
594 | for (i = 0; i < nr_blks; i++) { | |
595 | switch (blks[i]) { | |
596 | case NVM_BLK_T_FREE: | |
597 | if (f->flags & NVM_FACTORY_ERASE_ONLY_USER) | |
598 | set_bit(i, &f->blks[lunoff]); | |
599 | break; | |
600 | case NVM_BLK_T_HOST: | |
601 | if (!(f->flags & NVM_FACTORY_RESET_HOST_BLKS)) | |
602 | set_bit(i, &f->blks[lunoff]); | |
603 | break; | |
604 | case NVM_BLK_T_GRWN_BAD: | |
605 | if (!(f->flags & NVM_FACTORY_RESET_GRWN_BBLKS)) | |
606 | set_bit(i, &f->blks[lunoff]); | |
607 | break; | |
608 | default: | |
609 | set_bit(i, &f->blks[lunoff]); | |
610 | break; | |
611 | } | |
612 | } | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
617 | static int nvm_fact_get_blks(struct nvm_dev *dev, struct ppa_addr *erase_list, | |
618 | int max_ppas, struct factory_blks *f) | |
619 | { | |
620 | struct ppa_addr ppa; | |
621 | int ch, lun, blkid, idx, done = 0, ppa_cnt = 0; | |
622 | unsigned long *offset; | |
623 | ||
624 | while (!done) { | |
625 | done = 1; | |
626 | for (ch = 0; ch < dev->nr_chnls; ch++) { | |
627 | for (lun = 0; lun < dev->luns_per_chnl; lun++) { | |
628 | idx = factory_blk_offset(dev, ch, lun); | |
629 | offset = &f->blks[idx]; | |
630 | ||
631 | blkid = find_first_zero_bit(offset, | |
632 | dev->blks_per_lun); | |
633 | if (blkid >= dev->blks_per_lun) | |
634 | continue; | |
635 | set_bit(blkid, offset); | |
636 | ||
637 | ppa.ppa = 0; | |
638 | ppa.g.ch = ch; | |
639 | ppa.g.lun = lun; | |
640 | ppa.g.blk = blkid; | |
641 | pr_debug("nvm: erase ppa (%u %u %u)\n", | |
642 | ppa.g.ch, | |
643 | ppa.g.lun, | |
644 | ppa.g.blk); | |
645 | ||
646 | erase_list[ppa_cnt] = ppa; | |
647 | ppa_cnt++; | |
648 | done = 0; | |
649 | ||
650 | if (ppa_cnt == max_ppas) | |
651 | return ppa_cnt; | |
652 | } | |
653 | } | |
654 | } | |
655 | ||
656 | return ppa_cnt; | |
657 | } | |
658 | ||
659 | static int nvm_fact_get_bb_tbl(struct nvm_dev *dev, struct ppa_addr ppa, | |
660 | nvm_bb_update_fn *fn, void *priv) | |
661 | { | |
662 | struct ppa_addr dev_ppa; | |
663 | int ret; | |
664 | ||
665 | dev_ppa = generic_to_dev_addr(dev, ppa); | |
666 | ||
667 | ret = dev->ops->get_bb_tbl(dev, dev_ppa, dev->blks_per_lun, fn, priv); | |
668 | if (ret) | |
669 | pr_err("nvm: failed bb tbl for ch%u lun%u\n", | |
670 | ppa.g.ch, ppa.g.blk); | |
671 | return ret; | |
672 | } | |
673 | ||
674 | static int nvm_fact_select_blks(struct nvm_dev *dev, struct factory_blks *f) | |
675 | { | |
676 | int ch, lun, ret; | |
677 | struct ppa_addr ppa; | |
678 | ||
679 | ppa.ppa = 0; | |
680 | for (ch = 0; ch < dev->nr_chnls; ch++) { | |
681 | for (lun = 0; lun < dev->luns_per_chnl; lun++) { | |
682 | ppa.g.ch = ch; | |
683 | ppa.g.lun = lun; | |
684 | ||
685 | ret = nvm_fact_get_bb_tbl(dev, ppa, nvm_factory_blks, | |
686 | f); | |
687 | if (ret) | |
688 | return ret; | |
689 | } | |
690 | } | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | int nvm_dev_factory(struct nvm_dev *dev, int flags) | |
696 | { | |
697 | struct factory_blks f; | |
698 | struct ppa_addr *ppas; | |
699 | int ppa_cnt, ret = -ENOMEM; | |
700 | int max_ppas = dev->ops->max_phys_sect / dev->nr_planes; | |
701 | struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; | |
702 | struct sysblk_scan s; | |
703 | ||
704 | f.blks = kzalloc(factory_nblks(dev->blks_per_lun) * dev->nr_luns, | |
705 | GFP_KERNEL); | |
706 | if (!f.blks) | |
707 | return ret; | |
708 | ||
709 | ppas = kcalloc(max_ppas, sizeof(struct ppa_addr), GFP_KERNEL); | |
710 | if (!ppas) | |
711 | goto err_blks; | |
712 | ||
713 | f.dev = dev; | |
714 | f.flags = flags; | |
715 | ||
716 | /* create list of blks to be erased */ | |
717 | ret = nvm_fact_select_blks(dev, &f); | |
718 | if (ret) | |
719 | goto err_ppas; | |
720 | ||
721 | /* continue to erase until list of blks until empty */ | |
722 | while ((ppa_cnt = nvm_fact_get_blks(dev, ppas, max_ppas, &f)) > 0) | |
723 | nvm_erase_ppa(dev, ppas, ppa_cnt); | |
724 | ||
725 | /* mark host reserved blocks free */ | |
726 | if (flags & NVM_FACTORY_RESET_HOST_BLKS) { | |
727 | nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); | |
728 | mutex_lock(&dev->mlock); | |
729 | ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, | |
730 | sysblk_get_host_blks); | |
731 | if (!ret) | |
732 | ret = nvm_set_bb_tbl(dev, &s, NVM_BLK_T_FREE); | |
733 | mutex_unlock(&dev->mlock); | |
734 | } | |
735 | err_ppas: | |
736 | kfree(ppas); | |
737 | err_blks: | |
738 | kfree(f.blks); | |
739 | return ret; | |
740 | } | |
741 | EXPORT_SYMBOL(nvm_dev_factory); |