Commit | Line | Data |
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a4bd217b JG |
1 | /* |
2 | * Copyright (C) 2016 CNEX Labs | |
3 | * Initial: Javier Gonzalez <javier@cnexlabs.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License version | |
7 | * 2 as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * pblk-recovery.c - pblk's recovery path | |
15 | */ | |
16 | ||
17 | #include "pblk.h" | |
18 | ||
19 | void pblk_submit_rec(struct work_struct *work) | |
20 | { | |
21 | struct pblk_rec_ctx *recovery = | |
22 | container_of(work, struct pblk_rec_ctx, ws_rec); | |
23 | struct pblk *pblk = recovery->pblk; | |
a4bd217b JG |
24 | struct nvm_rq *rqd = recovery->rqd; |
25 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
a4bd217b JG |
26 | struct bio *bio; |
27 | unsigned int nr_rec_secs; | |
28 | unsigned int pgs_read; | |
29 | int ret; | |
30 | ||
31 | nr_rec_secs = bitmap_weight((unsigned long int *)&rqd->ppa_status, | |
89a09c56 | 32 | NVM_MAX_VLBA); |
a4bd217b JG |
33 | |
34 | bio = bio_alloc(GFP_KERNEL, nr_rec_secs); | |
a4bd217b JG |
35 | |
36 | bio->bi_iter.bi_sector = 0; | |
37 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
38 | rqd->bio = bio; | |
39 | rqd->nr_ppas = nr_rec_secs; | |
40 | ||
41 | pgs_read = pblk_rb_read_to_bio_list(&pblk->rwb, bio, &recovery->failed, | |
42 | nr_rec_secs); | |
43 | if (pgs_read != nr_rec_secs) { | |
44 | pr_err("pblk: could not read recovery entries\n"); | |
45 | goto err; | |
46 | } | |
47 | ||
48 | if (pblk_setup_w_rec_rq(pblk, rqd, c_ctx)) { | |
49 | pr_err("pblk: could not setup recovery request\n"); | |
50 | goto err; | |
51 | } | |
52 | ||
53 | #ifdef CONFIG_NVM_DEBUG | |
54 | atomic_long_add(nr_rec_secs, &pblk->recov_writes); | |
55 | #endif | |
56 | ||
57 | ret = pblk_submit_io(pblk, rqd); | |
58 | if (ret) { | |
59 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
60 | goto err; | |
61 | } | |
62 | ||
b906bbb6 | 63 | mempool_free(recovery, &pblk->rec_pool); |
a4bd217b JG |
64 | return; |
65 | ||
66 | err: | |
67 | bio_put(bio); | |
e2cddf20 | 68 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
a4bd217b JG |
69 | } |
70 | ||
71 | int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx, | |
72 | struct pblk_rec_ctx *recovery, u64 *comp_bits, | |
73 | unsigned int comp) | |
74 | { | |
a4bd217b JG |
75 | struct nvm_rq *rec_rqd; |
76 | struct pblk_c_ctx *rec_ctx; | |
77 | int nr_entries = c_ctx->nr_valid + c_ctx->nr_padded; | |
78 | ||
e2cddf20 | 79 | rec_rqd = pblk_alloc_rqd(pblk, PBLK_WRITE); |
a4bd217b JG |
80 | rec_ctx = nvm_rq_to_pdu(rec_rqd); |
81 | ||
82 | /* Copy completion bitmap, but exclude the first X completed entries */ | |
83 | bitmap_shift_right((unsigned long int *)&rec_rqd->ppa_status, | |
84 | (unsigned long int *)comp_bits, | |
89a09c56 | 85 | comp, NVM_MAX_VLBA); |
a4bd217b JG |
86 | |
87 | /* Save the context for the entries that need to be re-written and | |
88 | * update current context with the completed entries. | |
89 | */ | |
90 | rec_ctx->sentry = pblk_rb_wrap_pos(&pblk->rwb, c_ctx->sentry + comp); | |
91 | if (comp >= c_ctx->nr_valid) { | |
92 | rec_ctx->nr_valid = 0; | |
93 | rec_ctx->nr_padded = nr_entries - comp; | |
94 | ||
95 | c_ctx->nr_padded = comp - c_ctx->nr_valid; | |
96 | } else { | |
97 | rec_ctx->nr_valid = c_ctx->nr_valid - comp; | |
98 | rec_ctx->nr_padded = c_ctx->nr_padded; | |
99 | ||
100 | c_ctx->nr_valid = comp; | |
101 | c_ctx->nr_padded = 0; | |
102 | } | |
103 | ||
104 | recovery->rqd = rec_rqd; | |
105 | recovery->pblk = pblk; | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
06bc072b | 110 | int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta_buf) |
a4bd217b JG |
111 | { |
112 | u32 crc; | |
113 | ||
dd2a4343 JG |
114 | crc = pblk_calc_emeta_crc(pblk, emeta_buf); |
115 | if (le32_to_cpu(emeta_buf->crc) != crc) | |
06bc072b | 116 | return 1; |
a4bd217b | 117 | |
dd2a4343 | 118 | if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) |
06bc072b | 119 | return 1; |
a4bd217b | 120 | |
06bc072b | 121 | return 0; |
a4bd217b JG |
122 | } |
123 | ||
124 | static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line) | |
125 | { | |
126 | struct nvm_tgt_dev *dev = pblk->dev; | |
127 | struct nvm_geo *geo = &dev->geo; | |
128 | struct pblk_line_meta *lm = &pblk->lm; | |
dd2a4343 JG |
129 | struct pblk_emeta *emeta = line->emeta; |
130 | struct line_emeta *emeta_buf = emeta->buf; | |
a4bd217b | 131 | __le64 *lba_list; |
75610cd9 HH |
132 | u64 data_start, data_end; |
133 | u64 nr_valid_lbas, nr_lbas = 0; | |
134 | u64 i; | |
a4bd217b | 135 | |
06bc072b | 136 | lba_list = emeta_to_lbas(pblk, emeta_buf); |
a4bd217b JG |
137 | if (!lba_list) |
138 | return 1; | |
139 | ||
140 | data_start = pblk_line_smeta_start(pblk, line) + lm->smeta_sec; | |
75610cd9 | 141 | data_end = line->emeta_ssec; |
dd2a4343 | 142 | nr_valid_lbas = le64_to_cpu(emeta_buf->nr_valid_lbas); |
a4bd217b | 143 | |
92957091 | 144 | for (i = data_start; i < data_end; i++) { |
a4bd217b JG |
145 | struct ppa_addr ppa; |
146 | int pos; | |
147 | ||
b1bcfda1 | 148 | ppa = addr_to_gen_ppa(pblk, i, line->id); |
a4bd217b JG |
149 | pos = pblk_ppa_to_pos(geo, ppa); |
150 | ||
151 | /* Do not update bad blocks */ | |
152 | if (test_bit(pos, line->blk_bitmap)) | |
153 | continue; | |
154 | ||
155 | if (le64_to_cpu(lba_list[i]) == ADDR_EMPTY) { | |
156 | spin_lock(&line->lock); | |
157 | if (test_and_set_bit(i, line->invalid_bitmap)) | |
2a79efd8 | 158 | WARN_ONCE(1, "pblk: rec. double invalidate:\n"); |
a4bd217b | 159 | else |
dd2a4343 | 160 | le32_add_cpu(line->vsc, -1); |
a4bd217b JG |
161 | spin_unlock(&line->lock); |
162 | ||
163 | continue; | |
164 | } | |
165 | ||
166 | pblk_update_map(pblk, le64_to_cpu(lba_list[i]), ppa); | |
167 | nr_lbas++; | |
168 | } | |
169 | ||
170 | if (nr_valid_lbas != nr_lbas) | |
75610cd9 HH |
171 | pr_err("pblk: line %d - inconsistent lba list(%llu/%llu)\n", |
172 | line->id, nr_valid_lbas, nr_lbas); | |
a4bd217b JG |
173 | |
174 | line->left_msecs = 0; | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static int pblk_calc_sec_in_line(struct pblk *pblk, struct pblk_line *line) | |
180 | { | |
181 | struct nvm_tgt_dev *dev = pblk->dev; | |
182 | struct nvm_geo *geo = &dev->geo; | |
183 | struct pblk_line_meta *lm = &pblk->lm; | |
184 | int nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line); | |
185 | ||
dd2a4343 | 186 | return lm->sec_per_line - lm->smeta_sec - lm->emeta_sec[0] - |
e46f4e48 | 187 | nr_bb * geo->clba; |
a4bd217b JG |
188 | } |
189 | ||
190 | struct pblk_recov_alloc { | |
191 | struct ppa_addr *ppa_list; | |
192 | struct pblk_sec_meta *meta_list; | |
193 | struct nvm_rq *rqd; | |
194 | void *data; | |
195 | dma_addr_t dma_ppa_list; | |
196 | dma_addr_t dma_meta_list; | |
197 | }; | |
198 | ||
199 | static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line, | |
200 | struct pblk_recov_alloc p, u64 r_ptr) | |
201 | { | |
202 | struct nvm_tgt_dev *dev = pblk->dev; | |
203 | struct nvm_geo *geo = &dev->geo; | |
204 | struct ppa_addr *ppa_list; | |
205 | struct pblk_sec_meta *meta_list; | |
206 | struct nvm_rq *rqd; | |
207 | struct bio *bio; | |
208 | void *data; | |
209 | dma_addr_t dma_ppa_list, dma_meta_list; | |
210 | u64 r_ptr_int; | |
211 | int left_ppas; | |
212 | int rq_ppas, rq_len; | |
213 | int i, j; | |
214 | int ret = 0; | |
a4bd217b JG |
215 | |
216 | ppa_list = p.ppa_list; | |
217 | meta_list = p.meta_list; | |
218 | rqd = p.rqd; | |
219 | data = p.data; | |
220 | dma_ppa_list = p.dma_ppa_list; | |
221 | dma_meta_list = p.dma_meta_list; | |
222 | ||
223 | left_ppas = line->cur_sec - r_ptr; | |
224 | if (!left_ppas) | |
225 | return 0; | |
226 | ||
227 | r_ptr_int = r_ptr; | |
228 | ||
229 | next_read_rq: | |
084ec9ba | 230 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
231 | |
232 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
233 | if (!rq_ppas) | |
234 | rq_ppas = pblk->min_write_pgs; | |
e46f4e48 | 235 | rq_len = rq_ppas * geo->csecs; |
a4bd217b JG |
236 | |
237 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
238 | if (IS_ERR(bio)) | |
239 | return PTR_ERR(bio); | |
240 | ||
241 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
242 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
243 | ||
244 | rqd->bio = bio; | |
245 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
246 | rqd->meta_list = meta_list; |
247 | rqd->nr_ppas = rq_ppas; | |
248 | rqd->ppa_list = ppa_list; | |
249 | rqd->dma_ppa_list = dma_ppa_list; | |
250 | rqd->dma_meta_list = dma_meta_list; | |
a4bd217b | 251 | |
f9c10152 JG |
252 | if (pblk_io_aligned(pblk, rq_ppas)) |
253 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
254 | else | |
255 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
256 | ||
a4bd217b JG |
257 | for (i = 0; i < rqd->nr_ppas; ) { |
258 | struct ppa_addr ppa; | |
259 | int pos; | |
260 | ||
261 | ppa = addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
b1bcfda1 | 262 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
263 | |
264 | while (test_bit(pos, line->blk_bitmap)) { | |
265 | r_ptr_int += pblk->min_write_pgs; | |
266 | ppa = addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
b1bcfda1 | 267 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
268 | } |
269 | ||
270 | for (j = 0; j < pblk->min_write_pgs; j++, i++, r_ptr_int++) | |
271 | rqd->ppa_list[i] = | |
272 | addr_to_gen_ppa(pblk, r_ptr_int, line->id); | |
273 | } | |
274 | ||
275 | /* If read fails, more padding is needed */ | |
1a94b2d4 | 276 | ret = pblk_submit_io_sync(pblk, rqd); |
a4bd217b JG |
277 | if (ret) { |
278 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
279 | return ret; | |
280 | } | |
281 | ||
588726d3 | 282 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
283 | |
284 | /* At this point, the read should not fail. If it does, it is a problem | |
285 | * we cannot recover from here. Need FTL log. | |
286 | */ | |
5d201f07 | 287 | if (rqd->error && rqd->error != NVM_RSP_WARN_HIGHECC) { |
a4bd217b JG |
288 | pr_err("pblk: L2P recovery failed (%d)\n", rqd->error); |
289 | return -EINTR; | |
290 | } | |
291 | ||
292 | for (i = 0; i < rqd->nr_ppas; i++) { | |
293 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
294 | ||
295 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
296 | continue; | |
297 | ||
298 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
299 | } | |
300 | ||
301 | left_ppas -= rq_ppas; | |
302 | if (left_ppas > 0) | |
303 | goto next_read_rq; | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
ee8d5c1a JG |
308 | static void pblk_recov_complete(struct kref *ref) |
309 | { | |
310 | struct pblk_pad_rq *pad_rq = container_of(ref, struct pblk_pad_rq, ref); | |
311 | ||
312 | complete(&pad_rq->wait); | |
313 | } | |
314 | ||
315 | static void pblk_end_io_recov(struct nvm_rq *rqd) | |
316 | { | |
317 | struct pblk_pad_rq *pad_rq = rqd->private; | |
318 | struct pblk *pblk = pad_rq->pblk; | |
ee8d5c1a | 319 | |
3eaa11e2 JG |
320 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
321 | ||
e2cddf20 | 322 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
3eaa11e2 JG |
323 | |
324 | atomic_dec(&pblk->inflight_io); | |
325 | kref_put(&pad_rq->ref, pblk_recov_complete); | |
ee8d5c1a JG |
326 | } |
327 | ||
a4bd217b | 328 | static int pblk_recov_pad_oob(struct pblk *pblk, struct pblk_line *line, |
ee8d5c1a | 329 | int left_ppas) |
a4bd217b JG |
330 | { |
331 | struct nvm_tgt_dev *dev = pblk->dev; | |
332 | struct nvm_geo *geo = &dev->geo; | |
333 | struct ppa_addr *ppa_list; | |
334 | struct pblk_sec_meta *meta_list; | |
ee8d5c1a | 335 | struct pblk_pad_rq *pad_rq; |
a4bd217b JG |
336 | struct nvm_rq *rqd; |
337 | struct bio *bio; | |
338 | void *data; | |
339 | dma_addr_t dma_ppa_list, dma_meta_list; | |
dd2a4343 | 340 | __le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
a4bd217b | 341 | u64 w_ptr = line->cur_sec; |
ee8d5c1a | 342 | int left_line_ppas, rq_ppas, rq_len; |
a4bd217b JG |
343 | int i, j; |
344 | int ret = 0; | |
a4bd217b | 345 | |
ee8d5c1a JG |
346 | spin_lock(&line->lock); |
347 | left_line_ppas = line->left_msecs; | |
348 | spin_unlock(&line->lock); | |
349 | ||
350 | pad_rq = kmalloc(sizeof(struct pblk_pad_rq), GFP_KERNEL); | |
351 | if (!pad_rq) | |
352 | return -ENOMEM; | |
353 | ||
e46f4e48 | 354 | data = vzalloc(pblk->max_write_pgs * geo->csecs); |
ee8d5c1a JG |
355 | if (!data) { |
356 | ret = -ENOMEM; | |
357 | goto free_rq; | |
358 | } | |
359 | ||
360 | pad_rq->pblk = pblk; | |
361 | init_completion(&pad_rq->wait); | |
362 | kref_init(&pad_rq->ref); | |
a4bd217b JG |
363 | |
364 | next_pad_rq: | |
365 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
ee8d5c1a JG |
366 | if (rq_ppas < pblk->min_write_pgs) { |
367 | pr_err("pblk: corrupted pad line %d\n", line->id); | |
3eaa11e2 | 368 | goto fail_free_pad; |
ee8d5c1a JG |
369 | } |
370 | ||
e46f4e48 | 371 | rq_len = rq_ppas * geo->csecs; |
a4bd217b | 372 | |
ee8d5c1a JG |
373 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); |
374 | if (!meta_list) { | |
375 | ret = -ENOMEM; | |
3eaa11e2 | 376 | goto fail_free_pad; |
ee8d5c1a JG |
377 | } |
378 | ||
379 | ppa_list = (void *)(meta_list) + pblk_dma_meta_size; | |
380 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
381 | ||
3eaa11e2 JG |
382 | bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len, |
383 | PBLK_VMALLOC_META, GFP_KERNEL); | |
ee8d5c1a JG |
384 | if (IS_ERR(bio)) { |
385 | ret = PTR_ERR(bio); | |
2942f50f | 386 | goto fail_free_meta; |
ee8d5c1a | 387 | } |
a4bd217b JG |
388 | |
389 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
390 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
391 | ||
e2cddf20 | 392 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); |
2942f50f | 393 | |
a4bd217b JG |
394 | rqd->bio = bio; |
395 | rqd->opcode = NVM_OP_PWRITE; | |
e2cddf20 | 396 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b JG |
397 | rqd->meta_list = meta_list; |
398 | rqd->nr_ppas = rq_ppas; | |
399 | rqd->ppa_list = ppa_list; | |
400 | rqd->dma_ppa_list = dma_ppa_list; | |
401 | rqd->dma_meta_list = dma_meta_list; | |
ee8d5c1a JG |
402 | rqd->end_io = pblk_end_io_recov; |
403 | rqd->private = pad_rq; | |
a4bd217b JG |
404 | |
405 | for (i = 0; i < rqd->nr_ppas; ) { | |
406 | struct ppa_addr ppa; | |
407 | int pos; | |
408 | ||
409 | w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
b1bcfda1 | 410 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); |
a4bd217b JG |
411 | pos = pblk_ppa_to_pos(geo, ppa); |
412 | ||
413 | while (test_bit(pos, line->blk_bitmap)) { | |
414 | w_ptr += pblk->min_write_pgs; | |
b1bcfda1 | 415 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); |
a4bd217b JG |
416 | pos = pblk_ppa_to_pos(geo, ppa); |
417 | } | |
418 | ||
419 | for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) { | |
420 | struct ppa_addr dev_ppa; | |
f417aa0b | 421 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
a4bd217b JG |
422 | |
423 | dev_ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
424 | ||
425 | pblk_map_invalidate(pblk, dev_ppa); | |
caa69fa5 | 426 | lba_list[w_ptr] = meta_list[i].lba = addr_empty; |
a4bd217b JG |
427 | rqd->ppa_list[i] = dev_ppa; |
428 | } | |
429 | } | |
430 | ||
ee8d5c1a | 431 | kref_get(&pad_rq->ref); |
3eaa11e2 | 432 | pblk_down_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
ee8d5c1a | 433 | |
a4bd217b JG |
434 | ret = pblk_submit_io(pblk, rqd); |
435 | if (ret) { | |
436 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
3eaa11e2 JG |
437 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
438 | goto fail_free_bio; | |
a4bd217b JG |
439 | } |
440 | ||
a4bd217b JG |
441 | left_line_ppas -= rq_ppas; |
442 | left_ppas -= rq_ppas; | |
ee8d5c1a | 443 | if (left_ppas && left_line_ppas) |
a4bd217b JG |
444 | goto next_pad_rq; |
445 | ||
ee8d5c1a JG |
446 | kref_put(&pad_rq->ref, pblk_recov_complete); |
447 | ||
448 | if (!wait_for_completion_io_timeout(&pad_rq->wait, | |
449 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
450 | pr_err("pblk: pad write timed out\n"); | |
451 | ret = -ETIME; | |
452 | } | |
453 | ||
3eaa11e2 JG |
454 | if (!pblk_line_is_full(line)) |
455 | pr_err("pblk: corrupted padded line: %d\n", line->id); | |
456 | ||
457 | vfree(data); | |
ee8d5c1a JG |
458 | free_rq: |
459 | kfree(pad_rq); | |
ee8d5c1a JG |
460 | return ret; |
461 | ||
3eaa11e2 JG |
462 | fail_free_bio: |
463 | bio_put(bio); | |
ee8d5c1a JG |
464 | fail_free_meta: |
465 | nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); | |
3eaa11e2 | 466 | fail_free_pad: |
ee8d5c1a | 467 | kfree(pad_rq); |
3eaa11e2 | 468 | vfree(data); |
ee8d5c1a | 469 | return ret; |
a4bd217b JG |
470 | } |
471 | ||
472 | /* When this function is called, it means that not all upper pages have been | |
473 | * written in a page that contains valid data. In order to recover this data, we | |
474 | * first find the write pointer on the device, then we pad all necessary | |
475 | * sectors, and finally attempt to read the valid data | |
476 | */ | |
477 | static int pblk_recov_scan_all_oob(struct pblk *pblk, struct pblk_line *line, | |
478 | struct pblk_recov_alloc p) | |
479 | { | |
480 | struct nvm_tgt_dev *dev = pblk->dev; | |
481 | struct nvm_geo *geo = &dev->geo; | |
482 | struct ppa_addr *ppa_list; | |
483 | struct pblk_sec_meta *meta_list; | |
484 | struct nvm_rq *rqd; | |
485 | struct bio *bio; | |
486 | void *data; | |
487 | dma_addr_t dma_ppa_list, dma_meta_list; | |
488 | u64 w_ptr = 0, r_ptr; | |
489 | int rq_ppas, rq_len; | |
490 | int i, j; | |
491 | int ret = 0; | |
492 | int rec_round; | |
493 | int left_ppas = pblk_calc_sec_in_line(pblk, line) - line->cur_sec; | |
a4bd217b JG |
494 | |
495 | ppa_list = p.ppa_list; | |
496 | meta_list = p.meta_list; | |
497 | rqd = p.rqd; | |
498 | data = p.data; | |
499 | dma_ppa_list = p.dma_ppa_list; | |
500 | dma_meta_list = p.dma_meta_list; | |
501 | ||
502 | /* we could recover up until the line write pointer */ | |
503 | r_ptr = line->cur_sec; | |
504 | rec_round = 0; | |
505 | ||
506 | next_rq: | |
084ec9ba | 507 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
508 | |
509 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
510 | if (!rq_ppas) | |
511 | rq_ppas = pblk->min_write_pgs; | |
e46f4e48 | 512 | rq_len = rq_ppas * geo->csecs; |
a4bd217b JG |
513 | |
514 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
515 | if (IS_ERR(bio)) | |
516 | return PTR_ERR(bio); | |
517 | ||
518 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
519 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
520 | ||
521 | rqd->bio = bio; | |
522 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
523 | rqd->meta_list = meta_list; |
524 | rqd->nr_ppas = rq_ppas; | |
525 | rqd->ppa_list = ppa_list; | |
526 | rqd->dma_ppa_list = dma_ppa_list; | |
527 | rqd->dma_meta_list = dma_meta_list; | |
a4bd217b | 528 | |
f9c10152 JG |
529 | if (pblk_io_aligned(pblk, rq_ppas)) |
530 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
531 | else | |
532 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
533 | ||
a4bd217b JG |
534 | for (i = 0; i < rqd->nr_ppas; ) { |
535 | struct ppa_addr ppa; | |
536 | int pos; | |
537 | ||
538 | w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
539 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
b1bcfda1 | 540 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
541 | |
542 | while (test_bit(pos, line->blk_bitmap)) { | |
543 | w_ptr += pblk->min_write_pgs; | |
544 | ppa = addr_to_gen_ppa(pblk, w_ptr, line->id); | |
b1bcfda1 | 545 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
546 | } |
547 | ||
548 | for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) | |
549 | rqd->ppa_list[i] = | |
550 | addr_to_gen_ppa(pblk, w_ptr, line->id); | |
551 | } | |
552 | ||
1a94b2d4 | 553 | ret = pblk_submit_io_sync(pblk, rqd); |
a4bd217b JG |
554 | if (ret) { |
555 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
556 | return ret; | |
557 | } | |
558 | ||
588726d3 | 559 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
560 | |
561 | /* This should not happen since the read failed during normal recovery, | |
562 | * but the media works funny sometimes... | |
563 | */ | |
564 | if (!rec_round++ && !rqd->error) { | |
565 | rec_round = 0; | |
566 | for (i = 0; i < rqd->nr_ppas; i++, r_ptr++) { | |
567 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
568 | ||
569 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
570 | continue; | |
571 | ||
572 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
573 | } | |
574 | } | |
575 | ||
576 | /* Reached the end of the written line */ | |
577 | if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) { | |
578 | int pad_secs, nr_error_bits, bit; | |
579 | int ret; | |
580 | ||
581 | bit = find_first_bit((void *)&rqd->ppa_status, rqd->nr_ppas); | |
582 | nr_error_bits = rqd->nr_ppas - bit; | |
583 | ||
584 | /* Roll back failed sectors */ | |
585 | line->cur_sec -= nr_error_bits; | |
586 | line->left_msecs += nr_error_bits; | |
587 | bitmap_clear(line->map_bitmap, line->cur_sec, nr_error_bits); | |
588 | ||
589 | pad_secs = pblk_pad_distance(pblk); | |
590 | if (pad_secs > line->left_msecs) | |
591 | pad_secs = line->left_msecs; | |
592 | ||
ee8d5c1a | 593 | ret = pblk_recov_pad_oob(pblk, line, pad_secs); |
a4bd217b JG |
594 | if (ret) |
595 | pr_err("pblk: OOB padding failed (err:%d)\n", ret); | |
596 | ||
597 | ret = pblk_recov_read_oob(pblk, line, p, r_ptr); | |
598 | if (ret) | |
599 | pr_err("pblk: OOB read failed (err:%d)\n", ret); | |
600 | ||
a4bd217b JG |
601 | left_ppas = 0; |
602 | } | |
603 | ||
604 | left_ppas -= rq_ppas; | |
605 | if (left_ppas > 0) | |
606 | goto next_rq; | |
607 | ||
608 | return ret; | |
609 | } | |
610 | ||
611 | static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line, | |
612 | struct pblk_recov_alloc p, int *done) | |
613 | { | |
614 | struct nvm_tgt_dev *dev = pblk->dev; | |
615 | struct nvm_geo *geo = &dev->geo; | |
616 | struct ppa_addr *ppa_list; | |
617 | struct pblk_sec_meta *meta_list; | |
618 | struct nvm_rq *rqd; | |
619 | struct bio *bio; | |
620 | void *data; | |
621 | dma_addr_t dma_ppa_list, dma_meta_list; | |
622 | u64 paddr; | |
623 | int rq_ppas, rq_len; | |
624 | int i, j; | |
625 | int ret = 0; | |
626 | int left_ppas = pblk_calc_sec_in_line(pblk, line); | |
a4bd217b JG |
627 | |
628 | ppa_list = p.ppa_list; | |
629 | meta_list = p.meta_list; | |
630 | rqd = p.rqd; | |
631 | data = p.data; | |
632 | dma_ppa_list = p.dma_ppa_list; | |
633 | dma_meta_list = p.dma_meta_list; | |
634 | ||
635 | *done = 1; | |
636 | ||
637 | next_rq: | |
084ec9ba | 638 | memset(rqd, 0, pblk_g_rq_size); |
a4bd217b JG |
639 | |
640 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
641 | if (!rq_ppas) | |
642 | rq_ppas = pblk->min_write_pgs; | |
e46f4e48 | 643 | rq_len = rq_ppas * geo->csecs; |
a4bd217b JG |
644 | |
645 | bio = bio_map_kern(dev->q, data, rq_len, GFP_KERNEL); | |
646 | if (IS_ERR(bio)) | |
647 | return PTR_ERR(bio); | |
648 | ||
649 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
650 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
651 | ||
652 | rqd->bio = bio; | |
653 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
654 | rqd->meta_list = meta_list; |
655 | rqd->nr_ppas = rq_ppas; | |
656 | rqd->ppa_list = ppa_list; | |
657 | rqd->dma_ppa_list = dma_ppa_list; | |
658 | rqd->dma_meta_list = dma_meta_list; | |
a4bd217b | 659 | |
f9c10152 JG |
660 | if (pblk_io_aligned(pblk, rq_ppas)) |
661 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
662 | else | |
663 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
664 | ||
a4bd217b JG |
665 | for (i = 0; i < rqd->nr_ppas; ) { |
666 | struct ppa_addr ppa; | |
667 | int pos; | |
668 | ||
669 | paddr = pblk_alloc_page(pblk, line, pblk->min_write_pgs); | |
670 | ppa = addr_to_gen_ppa(pblk, paddr, line->id); | |
b1bcfda1 | 671 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
672 | |
673 | while (test_bit(pos, line->blk_bitmap)) { | |
674 | paddr += pblk->min_write_pgs; | |
675 | ppa = addr_to_gen_ppa(pblk, paddr, line->id); | |
b1bcfda1 | 676 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
677 | } |
678 | ||
679 | for (j = 0; j < pblk->min_write_pgs; j++, i++, paddr++) | |
680 | rqd->ppa_list[i] = | |
681 | addr_to_gen_ppa(pblk, paddr, line->id); | |
682 | } | |
683 | ||
1a94b2d4 | 684 | ret = pblk_submit_io_sync(pblk, rqd); |
a4bd217b JG |
685 | if (ret) { |
686 | pr_err("pblk: I/O submission failed: %d\n", ret); | |
687 | bio_put(bio); | |
688 | return ret; | |
689 | } | |
690 | ||
588726d3 | 691 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
692 | |
693 | /* Reached the end of the written line */ | |
694 | if (rqd->error) { | |
695 | int nr_error_bits, bit; | |
696 | ||
697 | bit = find_first_bit((void *)&rqd->ppa_status, rqd->nr_ppas); | |
698 | nr_error_bits = rqd->nr_ppas - bit; | |
699 | ||
700 | /* Roll back failed sectors */ | |
701 | line->cur_sec -= nr_error_bits; | |
702 | line->left_msecs += nr_error_bits; | |
a4bd217b JG |
703 | bitmap_clear(line->map_bitmap, line->cur_sec, nr_error_bits); |
704 | ||
705 | left_ppas = 0; | |
706 | rqd->nr_ppas = bit; | |
707 | ||
708 | if (rqd->error != NVM_RSP_ERR_EMPTYPAGE) | |
709 | *done = 0; | |
710 | } | |
711 | ||
712 | for (i = 0; i < rqd->nr_ppas; i++) { | |
713 | u64 lba = le64_to_cpu(meta_list[i].lba); | |
714 | ||
715 | if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs) | |
716 | continue; | |
717 | ||
718 | pblk_update_map(pblk, lba, rqd->ppa_list[i]); | |
719 | } | |
720 | ||
721 | left_ppas -= rq_ppas; | |
722 | if (left_ppas > 0) | |
723 | goto next_rq; | |
724 | ||
725 | return ret; | |
726 | } | |
727 | ||
728 | /* Scan line for lbas on out of bound area */ | |
729 | static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line) | |
730 | { | |
731 | struct nvm_tgt_dev *dev = pblk->dev; | |
732 | struct nvm_geo *geo = &dev->geo; | |
733 | struct nvm_rq *rqd; | |
734 | struct ppa_addr *ppa_list; | |
735 | struct pblk_sec_meta *meta_list; | |
736 | struct pblk_recov_alloc p; | |
737 | void *data; | |
738 | dma_addr_t dma_ppa_list, dma_meta_list; | |
739 | int done, ret = 0; | |
740 | ||
a4bd217b | 741 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list); |
2942f50f JG |
742 | if (!meta_list) |
743 | return -ENOMEM; | |
a4bd217b JG |
744 | |
745 | ppa_list = (void *)(meta_list) + pblk_dma_meta_size; | |
746 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
747 | ||
e46f4e48 | 748 | data = kcalloc(pblk->max_write_pgs, geo->csecs, GFP_KERNEL); |
a4bd217b JG |
749 | if (!data) { |
750 | ret = -ENOMEM; | |
751 | goto free_meta_list; | |
752 | } | |
753 | ||
e2cddf20 | 754 | rqd = pblk_alloc_rqd(pblk, PBLK_READ); |
2942f50f | 755 | |
a4bd217b JG |
756 | p.ppa_list = ppa_list; |
757 | p.meta_list = meta_list; | |
758 | p.rqd = rqd; | |
759 | p.data = data; | |
760 | p.dma_ppa_list = dma_ppa_list; | |
761 | p.dma_meta_list = dma_meta_list; | |
762 | ||
763 | ret = pblk_recov_scan_oob(pblk, line, p, &done); | |
764 | if (ret) { | |
765 | pr_err("pblk: could not recover L2P from OOB\n"); | |
766 | goto out; | |
767 | } | |
768 | ||
769 | if (!done) { | |
770 | ret = pblk_recov_scan_all_oob(pblk, line, p); | |
771 | if (ret) { | |
772 | pr_err("pblk: could not recover L2P from OOB\n"); | |
773 | goto out; | |
774 | } | |
775 | } | |
776 | ||
777 | if (pblk_line_is_full(line)) | |
778 | pblk_line_recov_close(pblk, line); | |
779 | ||
780 | out: | |
781 | kfree(data); | |
782 | free_meta_list: | |
783 | nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list); | |
a4bd217b JG |
784 | |
785 | return ret; | |
786 | } | |
787 | ||
788 | /* Insert lines ordered by sequence number (seq_num) on list */ | |
789 | static void pblk_recov_line_add_ordered(struct list_head *head, | |
790 | struct pblk_line *line) | |
791 | { | |
792 | struct pblk_line *t = NULL; | |
793 | ||
794 | list_for_each_entry(t, head, list) | |
795 | if (t->seq_nr > line->seq_nr) | |
796 | break; | |
797 | ||
798 | __list_add(&line->list, t->list.prev, &t->list); | |
799 | } | |
800 | ||
75610cd9 | 801 | static u64 pblk_line_emeta_start(struct pblk *pblk, struct pblk_line *line) |
a4bd217b JG |
802 | { |
803 | struct nvm_tgt_dev *dev = pblk->dev; | |
804 | struct nvm_geo *geo = &dev->geo; | |
75610cd9 HH |
805 | struct pblk_line_meta *lm = &pblk->lm; |
806 | unsigned int emeta_secs; | |
807 | u64 emeta_start; | |
808 | struct ppa_addr ppa; | |
809 | int pos; | |
810 | ||
811 | emeta_secs = lm->emeta_sec[0]; | |
812 | emeta_start = lm->sec_per_line; | |
813 | ||
814 | while (emeta_secs) { | |
815 | emeta_start--; | |
b1bcfda1 | 816 | ppa = addr_to_gen_ppa(pblk, emeta_start, line->id); |
75610cd9 HH |
817 | pos = pblk_ppa_to_pos(geo, ppa); |
818 | if (!test_bit(pos, line->blk_bitmap)) | |
819 | emeta_secs--; | |
820 | } | |
821 | ||
822 | return emeta_start; | |
823 | } | |
824 | ||
d0ab0b1a HH |
825 | static int pblk_recov_check_line_version(struct pblk *pblk, |
826 | struct line_emeta *emeta) | |
827 | { | |
828 | struct line_header *header = &emeta->header; | |
829 | ||
830 | if (header->version_major != EMETA_VERSION_MAJOR) { | |
831 | pr_err("pblk: line major version mismatch: %d, expected: %d\n", | |
832 | header->version_major, EMETA_VERSION_MAJOR); | |
833 | return 1; | |
834 | } | |
835 | ||
836 | #ifdef NVM_DEBUG | |
837 | if (header->version_minor > EMETA_VERSION_MINOR) | |
838 | pr_info("pblk: newer line minor version found: %d\n", line_v); | |
839 | #endif | |
840 | ||
841 | return 0; | |
842 | } | |
843 | ||
76758390 HH |
844 | static void pblk_recov_wa_counters(struct pblk *pblk, |
845 | struct line_emeta *emeta) | |
846 | { | |
847 | struct pblk_line_meta *lm = &pblk->lm; | |
848 | struct line_header *header = &emeta->header; | |
849 | struct wa_counters *wa = emeta_to_wa(lm, emeta); | |
850 | ||
851 | /* WA counters were introduced in emeta version 0.2 */ | |
852 | if (header->version_major > 0 || header->version_minor >= 2) { | |
853 | u64 user = le64_to_cpu(wa->user); | |
854 | u64 pad = le64_to_cpu(wa->pad); | |
855 | u64 gc = le64_to_cpu(wa->gc); | |
856 | ||
857 | atomic64_set(&pblk->user_wa, user); | |
858 | atomic64_set(&pblk->pad_wa, pad); | |
859 | atomic64_set(&pblk->gc_wa, gc); | |
860 | ||
861 | pblk->user_rst_wa = user; | |
862 | pblk->pad_rst_wa = pad; | |
863 | pblk->gc_rst_wa = gc; | |
864 | } | |
865 | } | |
866 | ||
9156f360 HH |
867 | static int pblk_line_was_written(struct pblk_line *line, |
868 | struct pblk_line_meta *lm) | |
869 | { | |
870 | ||
871 | int i; | |
872 | int state_mask = NVM_CHK_ST_OFFLINE | NVM_CHK_ST_FREE; | |
873 | ||
874 | for (i = 0; i < lm->blk_per_line; i++) { | |
875 | if (!(line->chks[i].state & state_mask)) | |
876 | return 1; | |
877 | } | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
75610cd9 HH |
882 | struct pblk_line *pblk_recov_l2p(struct pblk *pblk) |
883 | { | |
a4bd217b JG |
884 | struct pblk_line_meta *lm = &pblk->lm; |
885 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
886 | struct pblk_line *line, *tline, *data_line = NULL; | |
dd2a4343 JG |
887 | struct pblk_smeta *smeta; |
888 | struct pblk_emeta *emeta; | |
889 | struct line_smeta *smeta_buf; | |
a4bd217b JG |
890 | int found_lines = 0, recovered_lines = 0, open_lines = 0; |
891 | int is_next = 0; | |
892 | int meta_line; | |
893 | int i, valid_uuid = 0; | |
894 | LIST_HEAD(recov_list); | |
895 | ||
896 | /* TODO: Implement FTL snapshot */ | |
897 | ||
898 | /* Scan recovery - takes place when FTL snapshot fails */ | |
899 | spin_lock(&l_mg->free_lock); | |
900 | meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
901 | set_bit(meta_line, &l_mg->meta_bitmap); | |
dd2a4343 JG |
902 | smeta = l_mg->sline_meta[meta_line]; |
903 | emeta = l_mg->eline_meta[meta_line]; | |
8224cbd8 | 904 | smeta_buf = (struct line_smeta *)smeta; |
a4bd217b JG |
905 | spin_unlock(&l_mg->free_lock); |
906 | ||
907 | /* Order data lines using their sequence number */ | |
908 | for (i = 0; i < l_mg->nr_lines; i++) { | |
909 | u32 crc; | |
910 | ||
911 | line = &pblk->lines[i]; | |
912 | ||
913 | memset(smeta, 0, lm->smeta_len); | |
914 | line->smeta = smeta; | |
dd2a4343 | 915 | line->lun_bitmap = ((void *)(smeta_buf)) + |
a4bd217b JG |
916 | sizeof(struct line_smeta); |
917 | ||
9156f360 HH |
918 | if (!pblk_line_was_written(line, lm)) |
919 | continue; | |
920 | ||
a4bd217b JG |
921 | /* Lines that cannot be read are assumed as not written here */ |
922 | if (pblk_line_read_smeta(pblk, line)) | |
923 | continue; | |
924 | ||
dd2a4343 JG |
925 | crc = pblk_calc_smeta_crc(pblk, smeta_buf); |
926 | if (le32_to_cpu(smeta_buf->crc) != crc) | |
a4bd217b JG |
927 | continue; |
928 | ||
dd2a4343 | 929 | if (le32_to_cpu(smeta_buf->header.identifier) != PBLK_MAGIC) |
a4bd217b JG |
930 | continue; |
931 | ||
d0ab0b1a | 932 | if (smeta_buf->header.version_major != SMETA_VERSION_MAJOR) { |
a4bd217b | 933 | pr_err("pblk: found incompatible line version %u\n", |
d0ab0b1a | 934 | smeta_buf->header.version_major); |
a4bd217b JG |
935 | return ERR_PTR(-EINVAL); |
936 | } | |
937 | ||
938 | /* The first valid instance uuid is used for initialization */ | |
939 | if (!valid_uuid) { | |
dd2a4343 | 940 | memcpy(pblk->instance_uuid, smeta_buf->header.uuid, 16); |
a4bd217b JG |
941 | valid_uuid = 1; |
942 | } | |
943 | ||
dd2a4343 | 944 | if (memcmp(pblk->instance_uuid, smeta_buf->header.uuid, 16)) { |
a4bd217b JG |
945 | pr_debug("pblk: ignore line %u due to uuid mismatch\n", |
946 | i); | |
947 | continue; | |
948 | } | |
949 | ||
950 | /* Update line metadata */ | |
951 | spin_lock(&line->lock); | |
dd2a4343 JG |
952 | line->id = le32_to_cpu(smeta_buf->header.id); |
953 | line->type = le16_to_cpu(smeta_buf->header.type); | |
954 | line->seq_nr = le64_to_cpu(smeta_buf->seq_nr); | |
a4bd217b JG |
955 | spin_unlock(&line->lock); |
956 | ||
957 | /* Update general metadata */ | |
958 | spin_lock(&l_mg->free_lock); | |
959 | if (line->seq_nr >= l_mg->d_seq_nr) | |
960 | l_mg->d_seq_nr = line->seq_nr + 1; | |
961 | l_mg->nr_free_lines--; | |
962 | spin_unlock(&l_mg->free_lock); | |
963 | ||
964 | if (pblk_line_recov_alloc(pblk, line)) | |
965 | goto out; | |
966 | ||
967 | pblk_recov_line_add_ordered(&recov_list, line); | |
968 | found_lines++; | |
969 | pr_debug("pblk: recovering data line %d, seq:%llu\n", | |
dd2a4343 | 970 | line->id, smeta_buf->seq_nr); |
a4bd217b JG |
971 | } |
972 | ||
973 | if (!found_lines) { | |
974 | pblk_setup_uuid(pblk); | |
975 | ||
976 | spin_lock(&l_mg->free_lock); | |
977 | WARN_ON_ONCE(!test_and_clear_bit(meta_line, | |
978 | &l_mg->meta_bitmap)); | |
979 | spin_unlock(&l_mg->free_lock); | |
980 | ||
981 | goto out; | |
982 | } | |
983 | ||
984 | /* Verify closed blocks and recover this portion of L2P table*/ | |
985 | list_for_each_entry_safe(line, tline, &recov_list, list) { | |
a4bd217b | 986 | recovered_lines++; |
a4bd217b | 987 | |
75610cd9 | 988 | line->emeta_ssec = pblk_line_emeta_start(pblk, line); |
8224cbd8 JG |
989 | line->emeta = emeta; |
990 | memset(line->emeta->buf, 0, lm->emeta_len[0]); | |
a4bd217b | 991 | |
dd2a4343 | 992 | if (pblk_line_read_emeta(pblk, line, line->emeta->buf)) { |
a4bd217b JG |
993 | pblk_recov_l2p_from_oob(pblk, line); |
994 | goto next; | |
995 | } | |
996 | ||
06bc072b HH |
997 | if (pblk_recov_check_emeta(pblk, line->emeta->buf)) { |
998 | pblk_recov_l2p_from_oob(pblk, line); | |
999 | goto next; | |
1000 | } | |
1001 | ||
d0ab0b1a HH |
1002 | if (pblk_recov_check_line_version(pblk, line->emeta->buf)) |
1003 | return ERR_PTR(-EINVAL); | |
1004 | ||
76758390 HH |
1005 | pblk_recov_wa_counters(pblk, line->emeta->buf); |
1006 | ||
a4bd217b JG |
1007 | if (pblk_recov_l2p_from_emeta(pblk, line)) |
1008 | pblk_recov_l2p_from_oob(pblk, line); | |
1009 | ||
1010 | next: | |
1011 | if (pblk_line_is_full(line)) { | |
1012 | struct list_head *move_list; | |
1013 | ||
1014 | spin_lock(&line->lock); | |
1015 | line->state = PBLK_LINESTATE_CLOSED; | |
1016 | move_list = pblk_line_gc_list(pblk, line); | |
1017 | spin_unlock(&line->lock); | |
1018 | ||
1019 | spin_lock(&l_mg->gc_lock); | |
1020 | list_move_tail(&line->list, move_list); | |
1021 | spin_unlock(&l_mg->gc_lock); | |
1022 | ||
e72ec1d3 | 1023 | kfree(line->map_bitmap); |
a4bd217b JG |
1024 | line->map_bitmap = NULL; |
1025 | line->smeta = NULL; | |
1026 | line->emeta = NULL; | |
1027 | } else { | |
1028 | if (open_lines > 1) | |
1029 | pr_err("pblk: failed to recover L2P\n"); | |
1030 | ||
1031 | open_lines++; | |
1032 | line->meta_line = meta_line; | |
1033 | data_line = line; | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | spin_lock(&l_mg->free_lock); | |
1038 | if (!open_lines) { | |
1039 | WARN_ON_ONCE(!test_and_clear_bit(meta_line, | |
1040 | &l_mg->meta_bitmap)); | |
1041 | pblk_line_replace_data(pblk); | |
1042 | } else { | |
1043 | /* Allocate next line for preparation */ | |
1044 | l_mg->data_next = pblk_line_get(pblk); | |
1045 | if (l_mg->data_next) { | |
1046 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; | |
1047 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
1048 | is_next = 1; | |
1049 | } | |
1050 | } | |
1051 | spin_unlock(&l_mg->free_lock); | |
1052 | ||
a7689938 | 1053 | if (is_next) |
a4bd217b | 1054 | pblk_line_erase(pblk, l_mg->data_next); |
a4bd217b JG |
1055 | |
1056 | out: | |
1057 | if (found_lines != recovered_lines) | |
1058 | pr_err("pblk: failed to recover all found lines %d/%d\n", | |
1059 | found_lines, recovered_lines); | |
1060 | ||
1061 | return data_line; | |
1062 | } | |
1063 | ||
1064 | /* | |
588726d3 | 1065 | * Pad current line |
a4bd217b | 1066 | */ |
588726d3 | 1067 | int pblk_recov_pad(struct pblk *pblk) |
a4bd217b | 1068 | { |
a4bd217b JG |
1069 | struct pblk_line *line; |
1070 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
588726d3 JG |
1071 | int left_msecs; |
1072 | int ret = 0; | |
a4bd217b JG |
1073 | |
1074 | spin_lock(&l_mg->free_lock); | |
1075 | line = l_mg->data_line; | |
588726d3 | 1076 | left_msecs = line->left_msecs; |
a4bd217b JG |
1077 | spin_unlock(&l_mg->free_lock); |
1078 | ||
ee8d5c1a | 1079 | ret = pblk_recov_pad_oob(pblk, line, left_msecs); |
588726d3 JG |
1080 | if (ret) { |
1081 | pr_err("pblk: Tear down padding failed (%d)\n", ret); | |
ee8d5c1a | 1082 | return ret; |
a4bd217b JG |
1083 | } |
1084 | ||
588726d3 | 1085 | pblk_line_close_meta(pblk, line); |
588726d3 | 1086 | return ret; |
a4bd217b | 1087 | } |