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e3eb3799 MB |
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 | ||
e11903f5 MB |
96 | static int sysblk_get_free_blks(struct nvm_dev *dev, struct ppa_addr ppa, |
97 | u8 *blks, int nr_blks, | |
98 | struct sysblk_scan *s) | |
99 | { | |
100 | struct ppa_addr *sppa; | |
101 | int i, blkid = 0; | |
102 | ||
103 | nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks); | |
104 | if (nr_blks < 0) | |
105 | return nr_blks; | |
106 | ||
107 | for (i = 0; i < nr_blks; i++) { | |
108 | if (blks[i] == NVM_BLK_T_HOST) | |
109 | return -EEXIST; | |
110 | ||
111 | if (blks[i] != NVM_BLK_T_FREE) | |
112 | continue; | |
113 | ||
114 | sppa = &s->ppas[scan_ppa_idx(s->row, blkid)]; | |
115 | sppa->g.ch = ppa.g.ch; | |
116 | sppa->g.lun = ppa.g.lun; | |
117 | sppa->g.blk = i; | |
118 | s->nr_ppas++; | |
119 | blkid++; | |
120 | ||
121 | pr_debug("nvm: use (%u %u %u) as sysblk\n", | |
122 | sppa->g.ch, sppa->g.lun, sppa->g.blk); | |
123 | if (blkid > MAX_BLKS_PR_SYSBLK - 1) | |
124 | return 0; | |
125 | } | |
126 | ||
127 | pr_err("nvm: sysblk failed get sysblk\n"); | |
128 | return -EINVAL; | |
129 | } | |
130 | ||
22e8c976 | 131 | static int sysblk_get_host_blks(struct nvm_dev *dev, struct ppa_addr ppa, |
e11903f5 MB |
132 | u8 *blks, int nr_blks, |
133 | struct sysblk_scan *s) | |
e3eb3799 | 134 | { |
e3eb3799 MB |
135 | int i, nr_sysblk = 0; |
136 | ||
22e8c976 MB |
137 | nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks); |
138 | if (nr_blks < 0) | |
139 | return nr_blks; | |
140 | ||
e3eb3799 MB |
141 | for (i = 0; i < nr_blks; i++) { |
142 | if (blks[i] != NVM_BLK_T_HOST) | |
143 | continue; | |
144 | ||
145 | if (s->nr_ppas == MAX_BLKS_PR_SYSBLK * MAX_SYSBLKS) { | |
146 | pr_err("nvm: too many host blks\n"); | |
147 | return -EINVAL; | |
148 | } | |
149 | ||
150 | ppa.g.blk = i; | |
151 | ||
152 | s->ppas[scan_ppa_idx(s->row, nr_sysblk)] = ppa; | |
153 | s->nr_ppas++; | |
154 | nr_sysblk++; | |
155 | } | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | static int nvm_get_all_sysblks(struct nvm_dev *dev, struct sysblk_scan *s, | |
e11903f5 | 161 | struct ppa_addr *ppas, int get_free) |
e3eb3799 | 162 | { |
e11903f5 MB |
163 | int i, nr_blks, ret = 0; |
164 | u8 *blks; | |
e3eb3799 MB |
165 | |
166 | s->nr_ppas = 0; | |
e11903f5 MB |
167 | nr_blks = dev->blks_per_lun * dev->plane_mode; |
168 | ||
169 | blks = kmalloc(nr_blks, GFP_KERNEL); | |
170 | if (!blks) | |
171 | return -ENOMEM; | |
e3eb3799 MB |
172 | |
173 | for (i = 0; i < s->nr_rows; i++) { | |
e3eb3799 MB |
174 | s->row = i; |
175 | ||
e11903f5 | 176 | ret = nvm_get_bb_tbl(dev, ppas[i], blks); |
e3eb3799 MB |
177 | if (ret) { |
178 | pr_err("nvm: failed bb tbl for ppa (%u %u)\n", | |
179 | ppas[i].g.ch, | |
180 | ppas[i].g.blk); | |
e11903f5 | 181 | goto err_get; |
e3eb3799 | 182 | } |
e11903f5 MB |
183 | |
184 | if (get_free) | |
185 | ret = sysblk_get_free_blks(dev, ppas[i], blks, nr_blks, | |
186 | s); | |
187 | else | |
188 | ret = sysblk_get_host_blks(dev, ppas[i], blks, nr_blks, | |
189 | s); | |
190 | ||
191 | if (ret) | |
192 | goto err_get; | |
e3eb3799 MB |
193 | } |
194 | ||
e11903f5 MB |
195 | err_get: |
196 | kfree(blks); | |
e3eb3799 MB |
197 | return ret; |
198 | } | |
199 | ||
200 | /* | |
201 | * scans a block for latest sysblk. | |
202 | * Returns: | |
203 | * 0 - newer sysblk not found. PPA is updated to latest page. | |
204 | * 1 - newer sysblk found and stored in *cur. PPA is updated to | |
205 | * next valid page. | |
206 | * <0- error. | |
207 | */ | |
208 | static int nvm_scan_block(struct nvm_dev *dev, struct ppa_addr *ppa, | |
209 | struct nvm_system_block *sblk) | |
210 | { | |
211 | struct nvm_system_block *cur; | |
4891d120 | 212 | int pg, ret, found = 0; |
e3eb3799 MB |
213 | |
214 | /* the full buffer for a flash page is allocated. Only the first of it | |
215 | * contains the system block information | |
216 | */ | |
4891d120 | 217 | cur = kmalloc(dev->pfpg_size, GFP_KERNEL); |
e3eb3799 MB |
218 | if (!cur) |
219 | return -ENOMEM; | |
220 | ||
221 | /* perform linear scan through the block */ | |
222 | for (pg = 0; pg < dev->lps_per_blk; pg++) { | |
223 | ppa->g.pg = ppa_to_slc(dev, pg); | |
224 | ||
225 | ret = nvm_submit_ppa(dev, ppa, 1, NVM_OP_PREAD, NVM_IO_SLC_MODE, | |
4891d120 | 226 | cur, dev->pfpg_size); |
e3eb3799 MB |
227 | if (ret) { |
228 | if (ret == NVM_RSP_ERR_EMPTYPAGE) { | |
229 | pr_debug("nvm: sysblk scan empty ppa (%u %u %u %u)\n", | |
230 | ppa->g.ch, | |
231 | ppa->g.lun, | |
232 | ppa->g.blk, | |
233 | ppa->g.pg); | |
234 | break; | |
235 | } | |
236 | pr_err("nvm: read failed (%x) for ppa (%u %u %u %u)", | |
237 | ret, | |
238 | ppa->g.ch, | |
239 | ppa->g.lun, | |
240 | ppa->g.blk, | |
241 | ppa->g.pg); | |
242 | break; /* if we can't read a page, continue to the | |
243 | * next blk | |
244 | */ | |
245 | } | |
246 | ||
247 | if (be32_to_cpu(cur->magic) != NVM_SYSBLK_MAGIC) { | |
248 | pr_debug("nvm: scan break for ppa (%u %u %u %u)\n", | |
249 | ppa->g.ch, | |
250 | ppa->g.lun, | |
251 | ppa->g.blk, | |
252 | ppa->g.pg); | |
253 | break; /* last valid page already found */ | |
254 | } | |
255 | ||
256 | if (be32_to_cpu(cur->seqnr) < be32_to_cpu(sblk->seqnr)) | |
257 | continue; | |
258 | ||
259 | memcpy(sblk, cur, sizeof(struct nvm_system_block)); | |
260 | found = 1; | |
261 | } | |
262 | ||
263 | kfree(cur); | |
264 | ||
265 | return found; | |
266 | } | |
267 | ||
268 | static int nvm_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s, int type) | |
269 | { | |
270 | struct nvm_rq rqd; | |
271 | int ret; | |
272 | ||
273 | if (s->nr_ppas > dev->ops->max_phys_sect) { | |
274 | pr_err("nvm: unable to update all sysblocks atomically\n"); | |
275 | return -EINVAL; | |
276 | } | |
277 | ||
278 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
279 | ||
5ebc7d9f | 280 | nvm_set_rqd_ppalist(dev, &rqd, s->ppas, s->nr_ppas, 1); |
e3eb3799 MB |
281 | nvm_generic_to_addr_mode(dev, &rqd); |
282 | ||
00ee6cc3 | 283 | ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_pages, type); |
e3eb3799 MB |
284 | nvm_free_rqd_ppalist(dev, &rqd); |
285 | if (ret) { | |
286 | pr_err("nvm: sysblk failed bb mark\n"); | |
287 | return -EINVAL; | |
288 | } | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
e3eb3799 MB |
293 | static int nvm_write_and_verify(struct nvm_dev *dev, struct nvm_sb_info *info, |
294 | struct sysblk_scan *s) | |
295 | { | |
296 | struct nvm_system_block nvmsb; | |
297 | void *buf; | |
4891d120 | 298 | int i, sect, ret = 0; |
e3eb3799 MB |
299 | struct ppa_addr *ppas; |
300 | ||
301 | nvm_cpu_to_sysblk(&nvmsb, info); | |
302 | ||
4891d120 | 303 | buf = kzalloc(dev->pfpg_size, GFP_KERNEL); |
e3eb3799 MB |
304 | if (!buf) |
305 | return -ENOMEM; | |
306 | memcpy(buf, &nvmsb, sizeof(struct nvm_system_block)); | |
307 | ||
308 | ppas = kcalloc(dev->sec_per_pg, sizeof(struct ppa_addr), GFP_KERNEL); | |
309 | if (!ppas) { | |
310 | ret = -ENOMEM; | |
311 | goto err; | |
312 | } | |
313 | ||
314 | /* Write and verify */ | |
315 | for (i = 0; i < s->nr_rows; i++) { | |
316 | ppas[0] = s->ppas[scan_ppa_idx(i, s->act_blk[i])]; | |
317 | ||
318 | pr_debug("nvm: writing sysblk to ppa (%u %u %u %u)\n", | |
319 | ppas[0].g.ch, | |
320 | ppas[0].g.lun, | |
321 | ppas[0].g.blk, | |
322 | ppas[0].g.pg); | |
323 | ||
324 | /* Expand to all sectors within a flash page */ | |
325 | if (dev->sec_per_pg > 1) { | |
326 | for (sect = 1; sect < dev->sec_per_pg; sect++) { | |
327 | ppas[sect].ppa = ppas[0].ppa; | |
328 | ppas[sect].g.sec = sect; | |
329 | } | |
330 | } | |
331 | ||
332 | ret = nvm_submit_ppa(dev, ppas, dev->sec_per_pg, NVM_OP_PWRITE, | |
4891d120 | 333 | NVM_IO_SLC_MODE, buf, dev->pfpg_size); |
e3eb3799 MB |
334 | if (ret) { |
335 | pr_err("nvm: sysblk failed program (%u %u %u)\n", | |
336 | ppas[0].g.ch, | |
337 | ppas[0].g.lun, | |
338 | ppas[0].g.blk); | |
339 | break; | |
340 | } | |
341 | ||
342 | ret = nvm_submit_ppa(dev, ppas, dev->sec_per_pg, NVM_OP_PREAD, | |
4891d120 | 343 | NVM_IO_SLC_MODE, buf, dev->pfpg_size); |
e3eb3799 MB |
344 | if (ret) { |
345 | pr_err("nvm: sysblk failed read (%u %u %u)\n", | |
346 | ppas[0].g.ch, | |
347 | ppas[0].g.lun, | |
348 | ppas[0].g.blk); | |
349 | break; | |
350 | } | |
351 | ||
352 | if (memcmp(buf, &nvmsb, sizeof(struct nvm_system_block))) { | |
353 | pr_err("nvm: sysblk failed verify (%u %u %u)\n", | |
354 | ppas[0].g.ch, | |
355 | ppas[0].g.lun, | |
356 | ppas[0].g.blk); | |
357 | ret = -EINVAL; | |
358 | break; | |
359 | } | |
360 | } | |
361 | ||
362 | kfree(ppas); | |
363 | err: | |
364 | kfree(buf); | |
365 | ||
366 | return ret; | |
367 | } | |
368 | ||
369 | static int nvm_prepare_new_sysblks(struct nvm_dev *dev, struct sysblk_scan *s) | |
370 | { | |
371 | int i, ret; | |
372 | unsigned long nxt_blk; | |
373 | struct ppa_addr *ppa; | |
374 | ||
375 | for (i = 0; i < s->nr_rows; i++) { | |
376 | nxt_blk = (s->act_blk[i] + 1) % MAX_BLKS_PR_SYSBLK; | |
377 | ppa = &s->ppas[scan_ppa_idx(i, nxt_blk)]; | |
378 | ppa->g.pg = ppa_to_slc(dev, 0); | |
379 | ||
380 | ret = nvm_erase_ppa(dev, ppa, 1); | |
381 | if (ret) | |
382 | return ret; | |
383 | ||
384 | s->act_blk[i] = nxt_blk; | |
385 | } | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | int nvm_get_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info) | |
391 | { | |
392 | struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; | |
393 | struct sysblk_scan s; | |
394 | struct nvm_system_block *cur; | |
395 | int i, j, found = 0; | |
396 | int ret = -ENOMEM; | |
397 | ||
398 | /* | |
399 | * 1. setup sysblk locations | |
400 | * 2. get bad block list | |
401 | * 3. filter on host-specific (type 3) | |
402 | * 4. iterate through all and find the highest seq nr. | |
403 | * 5. return superblock information | |
404 | */ | |
405 | ||
406 | if (!dev->ops->get_bb_tbl) | |
407 | return -EINVAL; | |
408 | ||
409 | nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); | |
410 | ||
411 | mutex_lock(&dev->mlock); | |
e11903f5 | 412 | ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0); |
e3eb3799 MB |
413 | if (ret) |
414 | goto err_sysblk; | |
415 | ||
416 | /* no sysblocks initialized */ | |
417 | if (!s.nr_ppas) | |
418 | goto err_sysblk; | |
419 | ||
420 | cur = kzalloc(sizeof(struct nvm_system_block), GFP_KERNEL); | |
421 | if (!cur) | |
422 | goto err_sysblk; | |
423 | ||
424 | /* find the latest block across all sysblocks */ | |
425 | for (i = 0; i < s.nr_rows; i++) { | |
426 | for (j = 0; j < MAX_BLKS_PR_SYSBLK; j++) { | |
427 | struct ppa_addr ppa = s.ppas[scan_ppa_idx(i, j)]; | |
428 | ||
429 | ret = nvm_scan_block(dev, &ppa, cur); | |
430 | if (ret > 0) | |
431 | found = 1; | |
432 | else if (ret < 0) | |
433 | break; | |
434 | } | |
435 | } | |
436 | ||
437 | nvm_sysblk_to_cpu(info, cur); | |
438 | ||
439 | kfree(cur); | |
440 | err_sysblk: | |
441 | mutex_unlock(&dev->mlock); | |
442 | ||
443 | if (found) | |
444 | return 1; | |
445 | return ret; | |
446 | } | |
447 | ||
448 | int nvm_update_sysblock(struct nvm_dev *dev, struct nvm_sb_info *new) | |
449 | { | |
450 | /* 1. for each latest superblock | |
451 | * 2. if room | |
452 | * a. write new flash page entry with the updated information | |
453 | * 3. if no room | |
454 | * a. find next available block on lun (linear search) | |
455 | * if none, continue to next lun | |
456 | * if none at all, report error. also report that it wasn't | |
457 | * possible to write to all superblocks. | |
458 | * c. write data to block. | |
459 | */ | |
460 | struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; | |
461 | struct sysblk_scan s; | |
462 | struct nvm_system_block *cur; | |
463 | int i, j, ppaidx, found = 0; | |
464 | int ret = -ENOMEM; | |
465 | ||
466 | if (!dev->ops->get_bb_tbl) | |
467 | return -EINVAL; | |
468 | ||
469 | nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); | |
470 | ||
471 | mutex_lock(&dev->mlock); | |
e11903f5 | 472 | ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0); |
e3eb3799 MB |
473 | if (ret) |
474 | goto err_sysblk; | |
475 | ||
476 | cur = kzalloc(sizeof(struct nvm_system_block), GFP_KERNEL); | |
477 | if (!cur) | |
478 | goto err_sysblk; | |
479 | ||
480 | /* Get the latest sysblk for each sysblk row */ | |
481 | for (i = 0; i < s.nr_rows; i++) { | |
482 | found = 0; | |
483 | for (j = 0; j < MAX_BLKS_PR_SYSBLK; j++) { | |
484 | ppaidx = scan_ppa_idx(i, j); | |
485 | ret = nvm_scan_block(dev, &s.ppas[ppaidx], cur); | |
486 | if (ret > 0) { | |
487 | s.act_blk[i] = j; | |
488 | found = 1; | |
489 | } else if (ret < 0) | |
490 | break; | |
491 | } | |
492 | } | |
493 | ||
494 | if (!found) { | |
495 | pr_err("nvm: no valid sysblks found to update\n"); | |
496 | ret = -EINVAL; | |
497 | goto err_cur; | |
498 | } | |
499 | ||
500 | /* | |
501 | * All sysblocks found. Check that they have same page id in their flash | |
502 | * blocks | |
503 | */ | |
504 | for (i = 1; i < s.nr_rows; i++) { | |
505 | struct ppa_addr l = s.ppas[scan_ppa_idx(0, s.act_blk[0])]; | |
506 | struct ppa_addr r = s.ppas[scan_ppa_idx(i, s.act_blk[i])]; | |
507 | ||
508 | if (l.g.pg != r.g.pg) { | |
509 | pr_err("nvm: sysblks not on same page. Previous update failed.\n"); | |
510 | ret = -EINVAL; | |
511 | goto err_cur; | |
512 | } | |
513 | } | |
514 | ||
515 | /* | |
516 | * Check that there haven't been another update to the seqnr since we | |
517 | * began | |
518 | */ | |
519 | if ((new->seqnr - 1) != be32_to_cpu(cur->seqnr)) { | |
520 | pr_err("nvm: seq is not sequential\n"); | |
521 | ret = -EINVAL; | |
522 | goto err_cur; | |
523 | } | |
524 | ||
525 | /* | |
526 | * When all pages in a block has been written, a new block is selected | |
527 | * and writing is performed on the new block. | |
528 | */ | |
529 | if (s.ppas[scan_ppa_idx(0, s.act_blk[0])].g.pg == | |
530 | dev->lps_per_blk - 1) { | |
531 | ret = nvm_prepare_new_sysblks(dev, &s); | |
532 | if (ret) | |
533 | goto err_cur; | |
534 | } | |
535 | ||
536 | ret = nvm_write_and_verify(dev, new, &s); | |
537 | err_cur: | |
538 | kfree(cur); | |
539 | err_sysblk: | |
540 | mutex_unlock(&dev->mlock); | |
541 | ||
542 | return ret; | |
543 | } | |
544 | ||
545 | int nvm_init_sysblock(struct nvm_dev *dev, struct nvm_sb_info *info) | |
546 | { | |
547 | struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; | |
548 | struct sysblk_scan s; | |
549 | int ret; | |
550 | ||
551 | /* | |
552 | * 1. select master blocks and select first available blks | |
553 | * 2. get bad block list | |
554 | * 3. mark MAX_SYSBLKS block as host-based device allocated. | |
555 | * 4. write and verify data to block | |
556 | */ | |
557 | ||
558 | if (!dev->ops->get_bb_tbl || !dev->ops->set_bb_tbl) | |
559 | return -EINVAL; | |
560 | ||
561 | if (!(dev->mccap & NVM_ID_CAP_SLC) || !dev->lps_per_blk) { | |
562 | pr_err("nvm: memory does not support SLC access\n"); | |
563 | return -EINVAL; | |
564 | } | |
565 | ||
566 | /* Index all sysblocks and mark them as host-driven */ | |
567 | nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); | |
568 | ||
569 | mutex_lock(&dev->mlock); | |
e11903f5 | 570 | ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 1); |
e3eb3799 MB |
571 | if (ret) |
572 | goto err_mark; | |
573 | ||
574 | ret = nvm_set_bb_tbl(dev, &s, NVM_BLK_T_HOST); | |
575 | if (ret) | |
576 | goto err_mark; | |
577 | ||
578 | /* Write to the first block of each row */ | |
579 | ret = nvm_write_and_verify(dev, info, &s); | |
580 | err_mark: | |
581 | mutex_unlock(&dev->mlock); | |
582 | return ret; | |
583 | } | |
8b4970c4 | 584 | |
8b4970c4 MB |
585 | static int factory_nblks(int nblks) |
586 | { | |
587 | /* Round up to nearest BITS_PER_LONG */ | |
588 | return (nblks + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1); | |
589 | } | |
590 | ||
6659d4d8 | 591 | static unsigned int factory_blk_offset(struct nvm_dev *dev, struct ppa_addr ppa) |
8b4970c4 MB |
592 | { |
593 | int nblks = factory_nblks(dev->blks_per_lun); | |
594 | ||
6659d4d8 | 595 | return ((ppa.g.ch * dev->luns_per_chnl * nblks) + (ppa.g.lun * nblks)) / |
8b4970c4 MB |
596 | BITS_PER_LONG; |
597 | } | |
598 | ||
22e8c976 | 599 | static int nvm_factory_blks(struct nvm_dev *dev, struct ppa_addr ppa, |
e11903f5 | 600 | u8 *blks, int nr_blks, |
6659d4d8 | 601 | unsigned long *blk_bitmap, int flags) |
8b4970c4 | 602 | { |
8b4970c4 MB |
603 | int i, lunoff; |
604 | ||
22e8c976 MB |
605 | nr_blks = nvm_bb_tbl_fold(dev, blks, nr_blks); |
606 | if (nr_blks < 0) | |
607 | return nr_blks; | |
608 | ||
6659d4d8 | 609 | lunoff = factory_blk_offset(dev, ppa); |
8b4970c4 MB |
610 | |
611 | /* non-set bits correspond to the block must be erased */ | |
612 | for (i = 0; i < nr_blks; i++) { | |
613 | switch (blks[i]) { | |
614 | case NVM_BLK_T_FREE: | |
6659d4d8 MB |
615 | if (flags & NVM_FACTORY_ERASE_ONLY_USER) |
616 | set_bit(i, &blk_bitmap[lunoff]); | |
8b4970c4 MB |
617 | break; |
618 | case NVM_BLK_T_HOST: | |
6659d4d8 MB |
619 | if (!(flags & NVM_FACTORY_RESET_HOST_BLKS)) |
620 | set_bit(i, &blk_bitmap[lunoff]); | |
8b4970c4 MB |
621 | break; |
622 | case NVM_BLK_T_GRWN_BAD: | |
6659d4d8 MB |
623 | if (!(flags & NVM_FACTORY_RESET_GRWN_BBLKS)) |
624 | set_bit(i, &blk_bitmap[lunoff]); | |
8b4970c4 MB |
625 | break; |
626 | default: | |
6659d4d8 | 627 | set_bit(i, &blk_bitmap[lunoff]); |
8b4970c4 MB |
628 | break; |
629 | } | |
630 | } | |
631 | ||
632 | return 0; | |
633 | } | |
634 | ||
635 | static int nvm_fact_get_blks(struct nvm_dev *dev, struct ppa_addr *erase_list, | |
6659d4d8 | 636 | int max_ppas, unsigned long *blk_bitmap) |
8b4970c4 MB |
637 | { |
638 | struct ppa_addr ppa; | |
639 | int ch, lun, blkid, idx, done = 0, ppa_cnt = 0; | |
640 | unsigned long *offset; | |
641 | ||
642 | while (!done) { | |
643 | done = 1; | |
5136061c | 644 | nvm_for_each_lun_ppa(dev, ppa, ch, lun) { |
6659d4d8 MB |
645 | idx = factory_blk_offset(dev, ppa); |
646 | offset = &blk_bitmap[idx]; | |
5136061c MB |
647 | |
648 | blkid = find_first_zero_bit(offset, | |
649 | dev->blks_per_lun); | |
650 | if (blkid >= dev->blks_per_lun) | |
651 | continue; | |
652 | set_bit(blkid, offset); | |
653 | ||
654 | ppa.g.blk = blkid; | |
655 | pr_debug("nvm: erase ppa (%u %u %u)\n", | |
656 | ppa.g.ch, | |
657 | ppa.g.lun, | |
658 | ppa.g.blk); | |
659 | ||
660 | erase_list[ppa_cnt] = ppa; | |
661 | ppa_cnt++; | |
662 | done = 0; | |
663 | ||
664 | if (ppa_cnt == max_ppas) | |
665 | return ppa_cnt; | |
8b4970c4 MB |
666 | } |
667 | } | |
668 | ||
669 | return ppa_cnt; | |
670 | } | |
671 | ||
6659d4d8 MB |
672 | static int nvm_fact_select_blks(struct nvm_dev *dev, unsigned long *blk_bitmap, |
673 | int flags) | |
8b4970c4 | 674 | { |
8b4970c4 | 675 | struct ppa_addr ppa; |
6659d4d8 | 676 | int ch, lun, nr_blks, ret = 0; |
e11903f5 MB |
677 | u8 *blks; |
678 | ||
679 | nr_blks = dev->blks_per_lun * dev->plane_mode; | |
680 | blks = kmalloc(nr_blks, GFP_KERNEL); | |
681 | if (!blks) | |
682 | return -ENOMEM; | |
8b4970c4 | 683 | |
5136061c | 684 | nvm_for_each_lun_ppa(dev, ppa, ch, lun) { |
e11903f5 MB |
685 | ret = nvm_get_bb_tbl(dev, ppa, blks); |
686 | if (ret) | |
687 | pr_err("nvm: failed bb tbl for ch%u lun%u\n", | |
688 | ppa.g.ch, ppa.g.blk); | |
689 | ||
6659d4d8 MB |
690 | ret = nvm_factory_blks(dev, ppa, blks, nr_blks, blk_bitmap, |
691 | flags); | |
5136061c | 692 | if (ret) |
6659d4d8 | 693 | break; |
8b4970c4 MB |
694 | } |
695 | ||
e11903f5 | 696 | kfree(blks); |
6659d4d8 | 697 | return ret; |
8b4970c4 MB |
698 | } |
699 | ||
700 | int nvm_dev_factory(struct nvm_dev *dev, int flags) | |
701 | { | |
8b4970c4 MB |
702 | struct ppa_addr *ppas; |
703 | int ppa_cnt, ret = -ENOMEM; | |
704 | int max_ppas = dev->ops->max_phys_sect / dev->nr_planes; | |
705 | struct ppa_addr sysblk_ppas[MAX_SYSBLKS]; | |
706 | struct sysblk_scan s; | |
6659d4d8 | 707 | unsigned long *blk_bitmap; |
8b4970c4 | 708 | |
6659d4d8 | 709 | blk_bitmap = kzalloc(factory_nblks(dev->blks_per_lun) * dev->nr_luns, |
8b4970c4 | 710 | GFP_KERNEL); |
6659d4d8 | 711 | if (!blk_bitmap) |
8b4970c4 MB |
712 | return ret; |
713 | ||
714 | ppas = kcalloc(max_ppas, sizeof(struct ppa_addr), GFP_KERNEL); | |
715 | if (!ppas) | |
716 | goto err_blks; | |
717 | ||
8b4970c4 | 718 | /* create list of blks to be erased */ |
6659d4d8 | 719 | ret = nvm_fact_select_blks(dev, blk_bitmap, flags); |
8b4970c4 MB |
720 | if (ret) |
721 | goto err_ppas; | |
722 | ||
723 | /* continue to erase until list of blks until empty */ | |
6659d4d8 MB |
724 | while ((ppa_cnt = |
725 | nvm_fact_get_blks(dev, ppas, max_ppas, blk_bitmap)) > 0) | |
8b4970c4 MB |
726 | nvm_erase_ppa(dev, ppas, ppa_cnt); |
727 | ||
728 | /* mark host reserved blocks free */ | |
729 | if (flags & NVM_FACTORY_RESET_HOST_BLKS) { | |
730 | nvm_setup_sysblk_scan(dev, &s, sysblk_ppas); | |
731 | mutex_lock(&dev->mlock); | |
e11903f5 | 732 | ret = nvm_get_all_sysblks(dev, &s, sysblk_ppas, 0); |
8b4970c4 MB |
733 | if (!ret) |
734 | ret = nvm_set_bb_tbl(dev, &s, NVM_BLK_T_FREE); | |
735 | mutex_unlock(&dev->mlock); | |
736 | } | |
737 | err_ppas: | |
738 | kfree(ppas); | |
739 | err_blks: | |
6659d4d8 | 740 | kfree(blk_bitmap); |
8b4970c4 MB |
741 | return ret; |
742 | } | |
743 | EXPORT_SYMBOL(nvm_dev_factory); |