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a4bd217b JG |
1 | /* |
2 | * Copyright (C) 2016 CNEX Labs | |
3 | * Initial release: Javier Gonzalez <javier@cnexlabs.com> | |
4 | * Matias Bjorling <matias@cnexlabs.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version | |
8 | * 2 as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * pblk-core.c - pblk's core functionality | |
16 | * | |
17 | */ | |
18 | ||
19 | #include "pblk.h" | |
a4bd217b | 20 | |
8bd40020 JG |
21 | static void pblk_line_mark_bb(struct work_struct *work) |
22 | { | |
23 | struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws, | |
24 | ws); | |
25 | struct pblk *pblk = line_ws->pblk; | |
26 | struct nvm_tgt_dev *dev = pblk->dev; | |
27 | struct ppa_addr *ppa = line_ws->priv; | |
28 | int ret; | |
29 | ||
30 | ret = nvm_set_tgt_bb_tbl(dev, ppa, 1, NVM_BLK_T_GRWN_BAD); | |
31 | if (ret) { | |
32 | struct pblk_line *line; | |
33 | int pos; | |
34 | ||
b1bcfda1 JG |
35 | line = &pblk->lines[pblk_ppa_to_line(*ppa)]; |
36 | pos = pblk_ppa_to_pos(&dev->geo, *ppa); | |
8bd40020 JG |
37 | |
38 | pr_err("pblk: failed to mark bb, line:%d, pos:%d\n", | |
39 | line->id, pos); | |
40 | } | |
41 | ||
42 | kfree(ppa); | |
b906bbb6 | 43 | mempool_free(line_ws, &pblk->gen_ws_pool); |
8bd40020 JG |
44 | } |
45 | ||
a4bd217b | 46 | static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line, |
32ef9412 | 47 | struct ppa_addr ppa_addr) |
a4bd217b JG |
48 | { |
49 | struct nvm_tgt_dev *dev = pblk->dev; | |
50 | struct nvm_geo *geo = &dev->geo; | |
32ef9412 JG |
51 | struct ppa_addr *ppa; |
52 | int pos = pblk_ppa_to_pos(geo, ppa_addr); | |
a4bd217b JG |
53 | |
54 | pr_debug("pblk: erase failed: line:%d, pos:%d\n", line->id, pos); | |
55 | atomic_long_inc(&pblk->erase_failed); | |
56 | ||
a44f53fa | 57 | atomic_dec(&line->blk_in_line); |
a4bd217b JG |
58 | if (test_and_set_bit(pos, line->blk_bitmap)) |
59 | pr_err("pblk: attempted to erase bb: line:%d, pos:%d\n", | |
60 | line->id, pos); | |
61 | ||
32ef9412 JG |
62 | /* Not necessary to mark bad blocks on 2.0 spec. */ |
63 | if (geo->version == NVM_OCSSD_SPEC_20) | |
64 | return; | |
65 | ||
66 | ppa = kmalloc(sizeof(struct ppa_addr), GFP_ATOMIC); | |
67 | if (!ppa) | |
68 | return; | |
69 | ||
70 | *ppa = ppa_addr; | |
b84ae4a8 JG |
71 | pblk_gen_run_ws(pblk, NULL, ppa, pblk_line_mark_bb, |
72 | GFP_ATOMIC, pblk->bb_wq); | |
a4bd217b JG |
73 | } |
74 | ||
75 | static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd) | |
76 | { | |
32ef9412 JG |
77 | struct nvm_tgt_dev *dev = pblk->dev; |
78 | struct nvm_geo *geo = &dev->geo; | |
79 | struct nvm_chk_meta *chunk; | |
a4bd217b | 80 | struct pblk_line *line; |
32ef9412 | 81 | int pos; |
a4bd217b | 82 | |
b1bcfda1 | 83 | line = &pblk->lines[pblk_ppa_to_line(rqd->ppa_addr)]; |
32ef9412 JG |
84 | pos = pblk_ppa_to_pos(geo, rqd->ppa_addr); |
85 | chunk = &line->chks[pos]; | |
86 | ||
a4bd217b JG |
87 | atomic_dec(&line->left_seblks); |
88 | ||
89 | if (rqd->error) { | |
32ef9412 JG |
90 | chunk->state = NVM_CHK_ST_OFFLINE; |
91 | pblk_mark_bb(pblk, line, rqd->ppa_addr); | |
92 | } else { | |
93 | chunk->state = NVM_CHK_ST_FREE; | |
a4bd217b | 94 | } |
588726d3 JG |
95 | |
96 | atomic_dec(&pblk->inflight_io); | |
a4bd217b JG |
97 | } |
98 | ||
99 | /* Erase completion assumes that only one block is erased at the time */ | |
100 | static void pblk_end_io_erase(struct nvm_rq *rqd) | |
101 | { | |
102 | struct pblk *pblk = rqd->private; | |
103 | ||
a4bd217b | 104 | __pblk_end_io_erase(pblk, rqd); |
b906bbb6 | 105 | mempool_free(rqd, &pblk->e_rq_pool); |
a4bd217b JG |
106 | } |
107 | ||
32ef9412 JG |
108 | /* |
109 | * Get information for all chunks from the device. | |
110 | * | |
111 | * The caller is responsible for freeing the returned structure | |
112 | */ | |
113 | struct nvm_chk_meta *pblk_chunk_get_info(struct pblk *pblk) | |
114 | { | |
115 | struct nvm_tgt_dev *dev = pblk->dev; | |
116 | struct nvm_geo *geo = &dev->geo; | |
117 | struct nvm_chk_meta *meta; | |
118 | struct ppa_addr ppa; | |
119 | unsigned long len; | |
120 | int ret; | |
121 | ||
122 | ppa.ppa = 0; | |
123 | ||
124 | len = geo->all_chunks * sizeof(*meta); | |
125 | meta = kzalloc(len, GFP_KERNEL); | |
126 | if (!meta) | |
127 | return ERR_PTR(-ENOMEM); | |
128 | ||
129 | ret = nvm_get_chunk_meta(dev, meta, ppa, geo->all_chunks); | |
130 | if (ret) { | |
131 | kfree(meta); | |
132 | return ERR_PTR(-EIO); | |
133 | } | |
134 | ||
135 | return meta; | |
136 | } | |
137 | ||
138 | struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk, | |
139 | struct nvm_chk_meta *meta, | |
140 | struct ppa_addr ppa) | |
141 | { | |
142 | struct nvm_tgt_dev *dev = pblk->dev; | |
143 | struct nvm_geo *geo = &dev->geo; | |
144 | int ch_off = ppa.m.grp * geo->num_chk * geo->num_lun; | |
145 | int lun_off = ppa.m.pu * geo->num_chk; | |
146 | int chk_off = ppa.m.chk; | |
147 | ||
148 | return meta + ch_off + lun_off + chk_off; | |
149 | } | |
150 | ||
0880a9aa JG |
151 | void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, |
152 | u64 paddr) | |
a4bd217b JG |
153 | { |
154 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
155 | struct list_head *move_list = NULL; | |
156 | ||
157 | /* Lines being reclaimed (GC'ed) cannot be invalidated. Before the L2P | |
158 | * table is modified with reclaimed sectors, a check is done to endure | |
159 | * that newer updates are not overwritten. | |
160 | */ | |
161 | spin_lock(&line->lock); | |
d340121e | 162 | WARN_ON(line->state == PBLK_LINESTATE_FREE); |
a4bd217b JG |
163 | |
164 | if (test_and_set_bit(paddr, line->invalid_bitmap)) { | |
165 | WARN_ONCE(1, "pblk: double invalidate\n"); | |
166 | spin_unlock(&line->lock); | |
167 | return; | |
168 | } | |
dd2a4343 | 169 | le32_add_cpu(line->vsc, -1); |
a4bd217b JG |
170 | |
171 | if (line->state == PBLK_LINESTATE_CLOSED) | |
172 | move_list = pblk_line_gc_list(pblk, line); | |
173 | spin_unlock(&line->lock); | |
174 | ||
175 | if (move_list) { | |
176 | spin_lock(&l_mg->gc_lock); | |
177 | spin_lock(&line->lock); | |
178 | /* Prevent moving a line that has just been chosen for GC */ | |
d340121e | 179 | if (line->state == PBLK_LINESTATE_GC) { |
a4bd217b JG |
180 | spin_unlock(&line->lock); |
181 | spin_unlock(&l_mg->gc_lock); | |
182 | return; | |
183 | } | |
184 | spin_unlock(&line->lock); | |
185 | ||
186 | list_move_tail(&line->list, move_list); | |
187 | spin_unlock(&l_mg->gc_lock); | |
188 | } | |
189 | } | |
190 | ||
191 | void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa) | |
192 | { | |
193 | struct pblk_line *line; | |
194 | u64 paddr; | |
195 | int line_id; | |
196 | ||
197 | #ifdef CONFIG_NVM_DEBUG | |
198 | /* Callers must ensure that the ppa points to a device address */ | |
199 | BUG_ON(pblk_addr_in_cache(ppa)); | |
200 | BUG_ON(pblk_ppa_empty(ppa)); | |
201 | #endif | |
202 | ||
b1bcfda1 | 203 | line_id = pblk_ppa_to_line(ppa); |
a4bd217b JG |
204 | line = &pblk->lines[line_id]; |
205 | paddr = pblk_dev_ppa_to_line_addr(pblk, ppa); | |
206 | ||
207 | __pblk_map_invalidate(pblk, line, paddr); | |
208 | } | |
209 | ||
a4bd217b JG |
210 | static void pblk_invalidate_range(struct pblk *pblk, sector_t slba, |
211 | unsigned int nr_secs) | |
212 | { | |
213 | sector_t lba; | |
214 | ||
215 | spin_lock(&pblk->trans_lock); | |
216 | for (lba = slba; lba < slba + nr_secs; lba++) { | |
217 | struct ppa_addr ppa; | |
218 | ||
219 | ppa = pblk_trans_map_get(pblk, lba); | |
220 | ||
221 | if (!pblk_addr_in_cache(ppa) && !pblk_ppa_empty(ppa)) | |
222 | pblk_map_invalidate(pblk, ppa); | |
223 | ||
224 | pblk_ppa_set_empty(&ppa); | |
225 | pblk_trans_map_set(pblk, lba, ppa); | |
226 | } | |
227 | spin_unlock(&pblk->trans_lock); | |
228 | } | |
229 | ||
67bf26a3 JG |
230 | /* Caller must guarantee that the request is a valid type */ |
231 | struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type) | |
a4bd217b JG |
232 | { |
233 | mempool_t *pool; | |
234 | struct nvm_rq *rqd; | |
235 | int rq_size; | |
236 | ||
67bf26a3 JG |
237 | switch (type) { |
238 | case PBLK_WRITE: | |
239 | case PBLK_WRITE_INT: | |
b906bbb6 | 240 | pool = &pblk->w_rq_pool; |
a4bd217b | 241 | rq_size = pblk_w_rq_size; |
67bf26a3 JG |
242 | break; |
243 | case PBLK_READ: | |
b906bbb6 | 244 | pool = &pblk->r_rq_pool; |
084ec9ba | 245 | rq_size = pblk_g_rq_size; |
67bf26a3 JG |
246 | break; |
247 | default: | |
b906bbb6 | 248 | pool = &pblk->e_rq_pool; |
67bf26a3 | 249 | rq_size = pblk_g_rq_size; |
a4bd217b JG |
250 | } |
251 | ||
252 | rqd = mempool_alloc(pool, GFP_KERNEL); | |
253 | memset(rqd, 0, rq_size); | |
254 | ||
255 | return rqd; | |
256 | } | |
257 | ||
67bf26a3 JG |
258 | /* Typically used on completion path. Cannot guarantee request consistency */ |
259 | void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type) | |
a4bd217b | 260 | { |
67bf26a3 | 261 | struct nvm_tgt_dev *dev = pblk->dev; |
a4bd217b JG |
262 | mempool_t *pool; |
263 | ||
67bf26a3 JG |
264 | switch (type) { |
265 | case PBLK_WRITE: | |
266 | kfree(((struct pblk_c_ctx *)nvm_rq_to_pdu(rqd))->lun_bitmap); | |
267 | case PBLK_WRITE_INT: | |
b906bbb6 | 268 | pool = &pblk->w_rq_pool; |
67bf26a3 JG |
269 | break; |
270 | case PBLK_READ: | |
b906bbb6 | 271 | pool = &pblk->r_rq_pool; |
67bf26a3 JG |
272 | break; |
273 | case PBLK_ERASE: | |
b906bbb6 | 274 | pool = &pblk->e_rq_pool; |
67bf26a3 JG |
275 | break; |
276 | default: | |
277 | pr_err("pblk: trying to free unknown rqd type\n"); | |
278 | return; | |
279 | } | |
a4bd217b | 280 | |
f142ac0b IK |
281 | if (rqd->meta_list) |
282 | nvm_dev_dma_free(dev->parent, rqd->meta_list, | |
283 | rqd->dma_meta_list); | |
a4bd217b JG |
284 | mempool_free(rqd, pool); |
285 | } | |
286 | ||
287 | void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, | |
288 | int nr_pages) | |
289 | { | |
290 | struct bio_vec bv; | |
291 | int i; | |
292 | ||
293 | WARN_ON(off + nr_pages != bio->bi_vcnt); | |
294 | ||
a4bd217b JG |
295 | for (i = off; i < nr_pages + off; i++) { |
296 | bv = bio->bi_io_vec[i]; | |
b906bbb6 | 297 | mempool_free(bv.bv_page, &pblk->page_bio_pool); |
a4bd217b JG |
298 | } |
299 | } | |
300 | ||
301 | int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, | |
302 | int nr_pages) | |
303 | { | |
304 | struct request_queue *q = pblk->dev->q; | |
305 | struct page *page; | |
306 | int i, ret; | |
307 | ||
308 | for (i = 0; i < nr_pages; i++) { | |
b906bbb6 | 309 | page = mempool_alloc(&pblk->page_bio_pool, flags); |
a4bd217b JG |
310 | |
311 | ret = bio_add_pc_page(q, bio, page, PBLK_EXPOSED_PAGE_SIZE, 0); | |
312 | if (ret != PBLK_EXPOSED_PAGE_SIZE) { | |
313 | pr_err("pblk: could not add page to bio\n"); | |
b906bbb6 | 314 | mempool_free(page, &pblk->page_bio_pool); |
a4bd217b JG |
315 | goto err; |
316 | } | |
317 | } | |
318 | ||
319 | return 0; | |
320 | err: | |
f142ac0b | 321 | pblk_bio_free_pages(pblk, bio, (bio->bi_vcnt - i), i); |
a4bd217b JG |
322 | return -1; |
323 | } | |
324 | ||
cc9c9a00 | 325 | void pblk_write_kick(struct pblk *pblk) |
a4bd217b JG |
326 | { |
327 | wake_up_process(pblk->writer_ts); | |
328 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(1000)); | |
329 | } | |
330 | ||
87c1d2d3 | 331 | void pblk_write_timer_fn(struct timer_list *t) |
a4bd217b | 332 | { |
87c1d2d3 | 333 | struct pblk *pblk = from_timer(pblk, t, wtimer); |
a4bd217b JG |
334 | |
335 | /* kick the write thread every tick to flush outstanding data */ | |
336 | pblk_write_kick(pblk); | |
337 | } | |
338 | ||
339 | void pblk_write_should_kick(struct pblk *pblk) | |
340 | { | |
341 | unsigned int secs_avail = pblk_rb_read_count(&pblk->rwb); | |
342 | ||
343 | if (secs_avail >= pblk->min_write_pgs) | |
344 | pblk_write_kick(pblk); | |
345 | } | |
346 | ||
8bd40020 | 347 | static void pblk_wait_for_meta(struct pblk *pblk) |
a4bd217b | 348 | { |
588726d3 JG |
349 | do { |
350 | if (!atomic_read(&pblk->inflight_io)) | |
351 | break; | |
a4bd217b | 352 | |
588726d3 JG |
353 | schedule(); |
354 | } while (1); | |
355 | } | |
a4bd217b | 356 | |
588726d3 JG |
357 | static void pblk_flush_writer(struct pblk *pblk) |
358 | { | |
359 | pblk_rb_flush(&pblk->rwb); | |
360 | do { | |
ee8d5c1a | 361 | if (!pblk_rb_sync_count(&pblk->rwb)) |
588726d3 | 362 | break; |
a4bd217b | 363 | |
ee8d5c1a | 364 | pblk_write_kick(pblk); |
588726d3 JG |
365 | schedule(); |
366 | } while (1); | |
a4bd217b JG |
367 | } |
368 | ||
369 | struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line) | |
370 | { | |
371 | struct pblk_line_meta *lm = &pblk->lm; | |
372 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
373 | struct list_head *move_list = NULL; | |
dd2a4343 | 374 | int vsc = le32_to_cpu(*line->vsc); |
a4bd217b | 375 | |
476118c9 JG |
376 | lockdep_assert_held(&line->lock); |
377 | ||
48b8d208 HH |
378 | if (line->w_err_gc->has_write_err) { |
379 | if (line->gc_group != PBLK_LINEGC_WERR) { | |
380 | line->gc_group = PBLK_LINEGC_WERR; | |
381 | move_list = &l_mg->gc_werr_list; | |
382 | pblk_rl_werr_line_in(&pblk->rl); | |
383 | } | |
384 | } else if (!vsc) { | |
a4bd217b JG |
385 | if (line->gc_group != PBLK_LINEGC_FULL) { |
386 | line->gc_group = PBLK_LINEGC_FULL; | |
387 | move_list = &l_mg->gc_full_list; | |
388 | } | |
b20ba1bc | 389 | } else if (vsc < lm->high_thrs) { |
a4bd217b JG |
390 | if (line->gc_group != PBLK_LINEGC_HIGH) { |
391 | line->gc_group = PBLK_LINEGC_HIGH; | |
392 | move_list = &l_mg->gc_high_list; | |
393 | } | |
b20ba1bc | 394 | } else if (vsc < lm->mid_thrs) { |
a4bd217b JG |
395 | if (line->gc_group != PBLK_LINEGC_MID) { |
396 | line->gc_group = PBLK_LINEGC_MID; | |
397 | move_list = &l_mg->gc_mid_list; | |
398 | } | |
dd2a4343 | 399 | } else if (vsc < line->sec_in_line) { |
a4bd217b JG |
400 | if (line->gc_group != PBLK_LINEGC_LOW) { |
401 | line->gc_group = PBLK_LINEGC_LOW; | |
402 | move_list = &l_mg->gc_low_list; | |
403 | } | |
dd2a4343 | 404 | } else if (vsc == line->sec_in_line) { |
a4bd217b JG |
405 | if (line->gc_group != PBLK_LINEGC_EMPTY) { |
406 | line->gc_group = PBLK_LINEGC_EMPTY; | |
407 | move_list = &l_mg->gc_empty_list; | |
408 | } | |
409 | } else { | |
410 | line->state = PBLK_LINESTATE_CORRUPT; | |
411 | line->gc_group = PBLK_LINEGC_NONE; | |
412 | move_list = &l_mg->corrupt_list; | |
413 | pr_err("pblk: corrupted vsc for line %d, vsc:%d (%d/%d/%d)\n", | |
dd2a4343 | 414 | line->id, vsc, |
a4bd217b JG |
415 | line->sec_in_line, |
416 | lm->high_thrs, lm->mid_thrs); | |
417 | } | |
418 | ||
419 | return move_list; | |
420 | } | |
421 | ||
422 | void pblk_discard(struct pblk *pblk, struct bio *bio) | |
423 | { | |
424 | sector_t slba = pblk_get_lba(bio); | |
425 | sector_t nr_secs = pblk_get_secs(bio); | |
426 | ||
427 | pblk_invalidate_range(pblk, slba, nr_secs); | |
428 | } | |
429 | ||
a4bd217b JG |
430 | void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd) |
431 | { | |
432 | atomic_long_inc(&pblk->write_failed); | |
433 | #ifdef CONFIG_NVM_DEBUG | |
434 | pblk_print_failed_rqd(pblk, rqd, rqd->error); | |
435 | #endif | |
436 | } | |
437 | ||
438 | void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd) | |
439 | { | |
440 | /* Empty page read is not necessarily an error (e.g., L2P recovery) */ | |
441 | if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) { | |
442 | atomic_long_inc(&pblk->read_empty); | |
443 | return; | |
444 | } | |
445 | ||
446 | switch (rqd->error) { | |
447 | case NVM_RSP_WARN_HIGHECC: | |
448 | atomic_long_inc(&pblk->read_high_ecc); | |
449 | break; | |
450 | case NVM_RSP_ERR_FAILECC: | |
451 | case NVM_RSP_ERR_FAILCRC: | |
452 | atomic_long_inc(&pblk->read_failed); | |
453 | break; | |
454 | default: | |
455 | pr_err("pblk: unknown read error:%d\n", rqd->error); | |
456 | } | |
457 | #ifdef CONFIG_NVM_DEBUG | |
458 | pblk_print_failed_rqd(pblk, rqd, rqd->error); | |
459 | #endif | |
460 | } | |
461 | ||
c2e9f5d4 JG |
462 | void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write) |
463 | { | |
464 | pblk->sec_per_write = sec_per_write; | |
465 | } | |
466 | ||
a4bd217b JG |
467 | int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd) |
468 | { | |
469 | struct nvm_tgt_dev *dev = pblk->dev; | |
470 | ||
b6730dd4 | 471 | atomic_inc(&pblk->inflight_io); |
a4bd217b | 472 | |
b6730dd4 JG |
473 | #ifdef CONFIG_NVM_DEBUG |
474 | if (pblk_check_io(pblk, rqd)) | |
475 | return NVM_IO_ERR; | |
1a94b2d4 | 476 | #endif |
a4bd217b | 477 | |
1a94b2d4 JG |
478 | return nvm_submit_io(dev, rqd); |
479 | } | |
a4bd217b | 480 | |
1a94b2d4 JG |
481 | int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd) |
482 | { | |
483 | struct nvm_tgt_dev *dev = pblk->dev; | |
484 | ||
b6730dd4 | 485 | atomic_inc(&pblk->inflight_io); |
1a94b2d4 | 486 | |
b6730dd4 JG |
487 | #ifdef CONFIG_NVM_DEBUG |
488 | if (pblk_check_io(pblk, rqd)) | |
489 | return NVM_IO_ERR; | |
a4bd217b | 490 | #endif |
588726d3 | 491 | |
1a94b2d4 | 492 | return nvm_submit_io_sync(dev, rqd); |
a4bd217b JG |
493 | } |
494 | ||
55e836d4 JG |
495 | static void pblk_bio_map_addr_endio(struct bio *bio) |
496 | { | |
497 | bio_put(bio); | |
498 | } | |
499 | ||
a4bd217b JG |
500 | struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data, |
501 | unsigned int nr_secs, unsigned int len, | |
de54e703 | 502 | int alloc_type, gfp_t gfp_mask) |
a4bd217b JG |
503 | { |
504 | struct nvm_tgt_dev *dev = pblk->dev; | |
a4bd217b JG |
505 | void *kaddr = data; |
506 | struct page *page; | |
507 | struct bio *bio; | |
508 | int i, ret; | |
509 | ||
de54e703 | 510 | if (alloc_type == PBLK_KMALLOC_META) |
a4bd217b JG |
511 | return bio_map_kern(dev->q, kaddr, len, gfp_mask); |
512 | ||
513 | bio = bio_kmalloc(gfp_mask, nr_secs); | |
514 | if (!bio) | |
515 | return ERR_PTR(-ENOMEM); | |
516 | ||
517 | for (i = 0; i < nr_secs; i++) { | |
518 | page = vmalloc_to_page(kaddr); | |
519 | if (!page) { | |
520 | pr_err("pblk: could not map vmalloc bio\n"); | |
521 | bio_put(bio); | |
522 | bio = ERR_PTR(-ENOMEM); | |
523 | goto out; | |
524 | } | |
525 | ||
526 | ret = bio_add_pc_page(dev->q, bio, page, PAGE_SIZE, 0); | |
527 | if (ret != PAGE_SIZE) { | |
528 | pr_err("pblk: could not add page to bio\n"); | |
529 | bio_put(bio); | |
530 | bio = ERR_PTR(-ENOMEM); | |
531 | goto out; | |
532 | } | |
533 | ||
534 | kaddr += PAGE_SIZE; | |
535 | } | |
55e836d4 JG |
536 | |
537 | bio->bi_end_io = pblk_bio_map_addr_endio; | |
a4bd217b JG |
538 | out: |
539 | return bio; | |
540 | } | |
541 | ||
542 | int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail, | |
543 | unsigned long secs_to_flush) | |
544 | { | |
c2e9f5d4 | 545 | int max = pblk->sec_per_write; |
a4bd217b JG |
546 | int min = pblk->min_write_pgs; |
547 | int secs_to_sync = 0; | |
548 | ||
549 | if (secs_avail >= max) | |
550 | secs_to_sync = max; | |
551 | else if (secs_avail >= min) | |
552 | secs_to_sync = min * (secs_avail / min); | |
553 | else if (secs_to_flush) | |
554 | secs_to_sync = min; | |
555 | ||
556 | return secs_to_sync; | |
557 | } | |
558 | ||
dd2a4343 JG |
559 | void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) |
560 | { | |
561 | u64 addr; | |
562 | int i; | |
563 | ||
e57903fd | 564 | spin_lock(&line->lock); |
dd2a4343 JG |
565 | addr = find_next_zero_bit(line->map_bitmap, |
566 | pblk->lm.sec_per_line, line->cur_sec); | |
567 | line->cur_sec = addr - nr_secs; | |
568 | ||
569 | for (i = 0; i < nr_secs; i++, line->cur_sec--) | |
570 | WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap)); | |
e57903fd | 571 | spin_unlock(&line->lock); |
dd2a4343 JG |
572 | } |
573 | ||
574 | u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) | |
a4bd217b JG |
575 | { |
576 | u64 addr; | |
577 | int i; | |
578 | ||
476118c9 JG |
579 | lockdep_assert_held(&line->lock); |
580 | ||
a4bd217b JG |
581 | /* logic error: ppa out-of-bounds. Prevent generating bad address */ |
582 | if (line->cur_sec + nr_secs > pblk->lm.sec_per_line) { | |
583 | WARN(1, "pblk: page allocation out of bounds\n"); | |
584 | nr_secs = pblk->lm.sec_per_line - line->cur_sec; | |
585 | } | |
586 | ||
587 | line->cur_sec = addr = find_next_zero_bit(line->map_bitmap, | |
588 | pblk->lm.sec_per_line, line->cur_sec); | |
589 | for (i = 0; i < nr_secs; i++, line->cur_sec++) | |
590 | WARN_ON(test_and_set_bit(line->cur_sec, line->map_bitmap)); | |
591 | ||
592 | return addr; | |
593 | } | |
594 | ||
595 | u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) | |
596 | { | |
597 | u64 addr; | |
598 | ||
599 | /* Lock needed in case a write fails and a recovery needs to remap | |
600 | * failed write buffer entries | |
601 | */ | |
602 | spin_lock(&line->lock); | |
603 | addr = __pblk_alloc_page(pblk, line, nr_secs); | |
604 | line->left_msecs -= nr_secs; | |
605 | WARN(line->left_msecs < 0, "pblk: page allocation out of bounds\n"); | |
606 | spin_unlock(&line->lock); | |
607 | ||
608 | return addr; | |
609 | } | |
610 | ||
dd2a4343 JG |
611 | u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line) |
612 | { | |
613 | u64 paddr; | |
614 | ||
615 | spin_lock(&line->lock); | |
616 | paddr = find_next_zero_bit(line->map_bitmap, | |
617 | pblk->lm.sec_per_line, line->cur_sec); | |
618 | spin_unlock(&line->lock); | |
619 | ||
620 | return paddr; | |
621 | } | |
622 | ||
a4bd217b JG |
623 | /* |
624 | * Submit emeta to one LUN in the raid line at the time to avoid a deadlock when | |
625 | * taking the per LUN semaphore. | |
626 | */ | |
627 | static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line, | |
dd2a4343 | 628 | void *emeta_buf, u64 paddr, int dir) |
a4bd217b JG |
629 | { |
630 | struct nvm_tgt_dev *dev = pblk->dev; | |
631 | struct nvm_geo *geo = &dev->geo; | |
de54e703 | 632 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
a4bd217b | 633 | struct pblk_line_meta *lm = &pblk->lm; |
63e3809c | 634 | void *ppa_list, *meta_list; |
a4bd217b JG |
635 | struct bio *bio; |
636 | struct nvm_rq rqd; | |
63e3809c | 637 | dma_addr_t dma_ppa_list, dma_meta_list; |
a4bd217b | 638 | int min = pblk->min_write_pgs; |
dd2a4343 | 639 | int left_ppas = lm->emeta_sec[0]; |
a4bd217b JG |
640 | int id = line->id; |
641 | int rq_ppas, rq_len; | |
642 | int cmd_op, bio_op; | |
a4bd217b JG |
643 | int i, j; |
644 | int ret; | |
a4bd217b | 645 | |
e2cddf20 | 646 | if (dir == PBLK_WRITE) { |
a4bd217b JG |
647 | bio_op = REQ_OP_WRITE; |
648 | cmd_op = NVM_OP_PWRITE; | |
e2cddf20 | 649 | } else if (dir == PBLK_READ) { |
a4bd217b JG |
650 | bio_op = REQ_OP_READ; |
651 | cmd_op = NVM_OP_PREAD; | |
a4bd217b JG |
652 | } else |
653 | return -EINVAL; | |
654 | ||
63e3809c JG |
655 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, |
656 | &dma_meta_list); | |
657 | if (!meta_list) | |
a4bd217b JG |
658 | return -ENOMEM; |
659 | ||
63e3809c JG |
660 | ppa_list = meta_list + pblk_dma_meta_size; |
661 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
662 | ||
a4bd217b JG |
663 | next_rq: |
664 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
665 | ||
666 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
e46f4e48 | 667 | rq_len = rq_ppas * geo->csecs; |
a4bd217b | 668 | |
de54e703 JG |
669 | bio = pblk_bio_map_addr(pblk, emeta_buf, rq_ppas, rq_len, |
670 | l_mg->emeta_alloc_type, GFP_KERNEL); | |
a4bd217b JG |
671 | if (IS_ERR(bio)) { |
672 | ret = PTR_ERR(bio); | |
673 | goto free_rqd_dma; | |
674 | } | |
675 | ||
676 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
677 | bio_set_op_attrs(bio, bio_op, 0); | |
678 | ||
679 | rqd.bio = bio; | |
63e3809c | 680 | rqd.meta_list = meta_list; |
a4bd217b | 681 | rqd.ppa_list = ppa_list; |
63e3809c | 682 | rqd.dma_meta_list = dma_meta_list; |
a4bd217b | 683 | rqd.dma_ppa_list = dma_ppa_list; |
63e3809c JG |
684 | rqd.opcode = cmd_op; |
685 | rqd.nr_ppas = rq_ppas; | |
a4bd217b | 686 | |
e2cddf20 | 687 | if (dir == PBLK_WRITE) { |
63e3809c JG |
688 | struct pblk_sec_meta *meta_list = rqd.meta_list; |
689 | ||
e2cddf20 | 690 | rqd.flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b JG |
691 | for (i = 0; i < rqd.nr_ppas; ) { |
692 | spin_lock(&line->lock); | |
693 | paddr = __pblk_alloc_page(pblk, line, min); | |
694 | spin_unlock(&line->lock); | |
63e3809c JG |
695 | for (j = 0; j < min; j++, i++, paddr++) { |
696 | meta_list[i].lba = cpu_to_le64(ADDR_EMPTY); | |
a4bd217b JG |
697 | rqd.ppa_list[i] = |
698 | addr_to_gen_ppa(pblk, paddr, id); | |
63e3809c | 699 | } |
a4bd217b JG |
700 | } |
701 | } else { | |
702 | for (i = 0; i < rqd.nr_ppas; ) { | |
703 | struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, id); | |
b1bcfda1 | 704 | int pos = pblk_ppa_to_pos(geo, ppa); |
f9c10152 JG |
705 | int read_type = PBLK_READ_RANDOM; |
706 | ||
707 | if (pblk_io_aligned(pblk, rq_ppas)) | |
708 | read_type = PBLK_READ_SEQUENTIAL; | |
709 | rqd.flags = pblk_set_read_mode(pblk, read_type); | |
a4bd217b JG |
710 | |
711 | while (test_bit(pos, line->blk_bitmap)) { | |
712 | paddr += min; | |
713 | if (pblk_boundary_paddr_checks(pblk, paddr)) { | |
714 | pr_err("pblk: corrupt emeta line:%d\n", | |
715 | line->id); | |
716 | bio_put(bio); | |
717 | ret = -EINTR; | |
718 | goto free_rqd_dma; | |
719 | } | |
720 | ||
721 | ppa = addr_to_gen_ppa(pblk, paddr, id); | |
b1bcfda1 | 722 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
723 | } |
724 | ||
725 | if (pblk_boundary_paddr_checks(pblk, paddr + min)) { | |
726 | pr_err("pblk: corrupt emeta line:%d\n", | |
727 | line->id); | |
728 | bio_put(bio); | |
729 | ret = -EINTR; | |
730 | goto free_rqd_dma; | |
731 | } | |
732 | ||
733 | for (j = 0; j < min; j++, i++, paddr++) | |
734 | rqd.ppa_list[i] = | |
735 | addr_to_gen_ppa(pblk, paddr, line->id); | |
736 | } | |
737 | } | |
738 | ||
1a94b2d4 | 739 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b JG |
740 | if (ret) { |
741 | pr_err("pblk: emeta I/O submission failed: %d\n", ret); | |
742 | bio_put(bio); | |
743 | goto free_rqd_dma; | |
744 | } | |
745 | ||
588726d3 | 746 | atomic_dec(&pblk->inflight_io); |
a4bd217b | 747 | |
a4bd217b | 748 | if (rqd.error) { |
e2cddf20 | 749 | if (dir == PBLK_WRITE) |
a4bd217b JG |
750 | pblk_log_write_err(pblk, &rqd); |
751 | else | |
752 | pblk_log_read_err(pblk, &rqd); | |
753 | } | |
754 | ||
dd2a4343 | 755 | emeta_buf += rq_len; |
a4bd217b JG |
756 | left_ppas -= rq_ppas; |
757 | if (left_ppas) | |
758 | goto next_rq; | |
759 | free_rqd_dma: | |
63e3809c | 760 | nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list); |
a4bd217b JG |
761 | return ret; |
762 | } | |
763 | ||
764 | u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line) | |
765 | { | |
766 | struct nvm_tgt_dev *dev = pblk->dev; | |
767 | struct nvm_geo *geo = &dev->geo; | |
768 | struct pblk_line_meta *lm = &pblk->lm; | |
769 | int bit; | |
770 | ||
771 | /* This usually only happens on bad lines */ | |
772 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
773 | if (bit >= lm->blk_per_line) | |
774 | return -1; | |
775 | ||
e46f4e48 | 776 | return bit * geo->ws_opt; |
a4bd217b JG |
777 | } |
778 | ||
779 | static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line, | |
780 | u64 paddr, int dir) | |
781 | { | |
782 | struct nvm_tgt_dev *dev = pblk->dev; | |
783 | struct pblk_line_meta *lm = &pblk->lm; | |
784 | struct bio *bio; | |
785 | struct nvm_rq rqd; | |
786 | __le64 *lba_list = NULL; | |
787 | int i, ret; | |
788 | int cmd_op, bio_op; | |
789 | int flags; | |
a4bd217b | 790 | |
e2cddf20 | 791 | if (dir == PBLK_WRITE) { |
a4bd217b JG |
792 | bio_op = REQ_OP_WRITE; |
793 | cmd_op = NVM_OP_PWRITE; | |
e2cddf20 | 794 | flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
dd2a4343 | 795 | lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
8f554597 | 796 | } else if (dir == PBLK_READ_RECOV || dir == PBLK_READ) { |
a4bd217b JG |
797 | bio_op = REQ_OP_READ; |
798 | cmd_op = NVM_OP_PREAD; | |
f9c10152 | 799 | flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); |
a4bd217b JG |
800 | } else |
801 | return -EINVAL; | |
802 | ||
803 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
804 | ||
63e3809c JG |
805 | rqd.meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, |
806 | &rqd.dma_meta_list); | |
807 | if (!rqd.meta_list) | |
a4bd217b JG |
808 | return -ENOMEM; |
809 | ||
63e3809c JG |
810 | rqd.ppa_list = rqd.meta_list + pblk_dma_meta_size; |
811 | rqd.dma_ppa_list = rqd.dma_meta_list + pblk_dma_meta_size; | |
812 | ||
a4bd217b JG |
813 | bio = bio_map_kern(dev->q, line->smeta, lm->smeta_len, GFP_KERNEL); |
814 | if (IS_ERR(bio)) { | |
815 | ret = PTR_ERR(bio); | |
816 | goto free_ppa_list; | |
817 | } | |
818 | ||
819 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
820 | bio_set_op_attrs(bio, bio_op, 0); | |
821 | ||
822 | rqd.bio = bio; | |
823 | rqd.opcode = cmd_op; | |
824 | rqd.flags = flags; | |
825 | rqd.nr_ppas = lm->smeta_sec; | |
a4bd217b JG |
826 | |
827 | for (i = 0; i < lm->smeta_sec; i++, paddr++) { | |
63e3809c JG |
828 | struct pblk_sec_meta *meta_list = rqd.meta_list; |
829 | ||
a4bd217b | 830 | rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id); |
63e3809c | 831 | |
e2cddf20 | 832 | if (dir == PBLK_WRITE) { |
f417aa0b | 833 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
63e3809c JG |
834 | |
835 | meta_list[i].lba = lba_list[paddr] = addr_empty; | |
836 | } | |
a4bd217b JG |
837 | } |
838 | ||
839 | /* | |
840 | * This I/O is sent by the write thread when a line is replace. Since | |
841 | * the write thread is the only one sending write and erase commands, | |
842 | * there is no need to take the LUN semaphore. | |
843 | */ | |
1a94b2d4 | 844 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b JG |
845 | if (ret) { |
846 | pr_err("pblk: smeta I/O submission failed: %d\n", ret); | |
847 | bio_put(bio); | |
848 | goto free_ppa_list; | |
849 | } | |
850 | ||
588726d3 | 851 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
852 | |
853 | if (rqd.error) { | |
6cf17a2f | 854 | if (dir == PBLK_WRITE) { |
a4bd217b | 855 | pblk_log_write_err(pblk, &rqd); |
6cf17a2f HH |
856 | ret = 1; |
857 | } else if (dir == PBLK_READ) | |
a4bd217b JG |
858 | pblk_log_read_err(pblk, &rqd); |
859 | } | |
860 | ||
861 | free_ppa_list: | |
63e3809c | 862 | nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list); |
a4bd217b JG |
863 | |
864 | return ret; | |
865 | } | |
866 | ||
867 | int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line) | |
868 | { | |
869 | u64 bpaddr = pblk_line_smeta_start(pblk, line); | |
870 | ||
8f554597 | 871 | return pblk_line_submit_smeta_io(pblk, line, bpaddr, PBLK_READ_RECOV); |
a4bd217b JG |
872 | } |
873 | ||
dd2a4343 JG |
874 | int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line, |
875 | void *emeta_buf) | |
a4bd217b | 876 | { |
dd2a4343 | 877 | return pblk_line_submit_emeta_io(pblk, line, emeta_buf, |
e2cddf20 | 878 | line->emeta_ssec, PBLK_READ); |
a4bd217b JG |
879 | } |
880 | ||
881 | static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
882 | struct ppa_addr ppa) | |
883 | { | |
884 | rqd->opcode = NVM_OP_ERASE; | |
885 | rqd->ppa_addr = ppa; | |
886 | rqd->nr_ppas = 1; | |
e2cddf20 | 887 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_ERASE); |
a4bd217b JG |
888 | rqd->bio = NULL; |
889 | } | |
890 | ||
891 | static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa) | |
892 | { | |
893 | struct nvm_rq rqd; | |
588726d3 | 894 | int ret = 0; |
a4bd217b JG |
895 | |
896 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
897 | ||
898 | pblk_setup_e_rq(pblk, &rqd, ppa); | |
899 | ||
a4bd217b JG |
900 | /* The write thread schedules erases so that it minimizes disturbances |
901 | * with writes. Thus, there is no need to take the LUN semaphore. | |
902 | */ | |
1a94b2d4 | 903 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b JG |
904 | if (ret) { |
905 | struct nvm_tgt_dev *dev = pblk->dev; | |
906 | struct nvm_geo *geo = &dev->geo; | |
907 | ||
908 | pr_err("pblk: could not sync erase line:%d,blk:%d\n", | |
b1bcfda1 JG |
909 | pblk_ppa_to_line(ppa), |
910 | pblk_ppa_to_pos(geo, ppa)); | |
a4bd217b JG |
911 | |
912 | rqd.error = ret; | |
913 | goto out; | |
914 | } | |
915 | ||
a4bd217b JG |
916 | out: |
917 | rqd.private = pblk; | |
918 | __pblk_end_io_erase(pblk, &rqd); | |
919 | ||
588726d3 | 920 | return ret; |
a4bd217b JG |
921 | } |
922 | ||
923 | int pblk_line_erase(struct pblk *pblk, struct pblk_line *line) | |
924 | { | |
925 | struct pblk_line_meta *lm = &pblk->lm; | |
926 | struct ppa_addr ppa; | |
588726d3 | 927 | int ret, bit = -1; |
a4bd217b | 928 | |
a44f53fa JG |
929 | /* Erase only good blocks, one at a time */ |
930 | do { | |
931 | spin_lock(&line->lock); | |
932 | bit = find_next_zero_bit(line->erase_bitmap, lm->blk_per_line, | |
933 | bit + 1); | |
934 | if (bit >= lm->blk_per_line) { | |
935 | spin_unlock(&line->lock); | |
936 | break; | |
937 | } | |
938 | ||
a4bd217b | 939 | ppa = pblk->luns[bit].bppa; /* set ch and lun */ |
69471513 | 940 | ppa.a.blk = line->id; |
a4bd217b | 941 | |
a44f53fa | 942 | atomic_dec(&line->left_eblks); |
a4bd217b | 943 | WARN_ON(test_and_set_bit(bit, line->erase_bitmap)); |
a44f53fa | 944 | spin_unlock(&line->lock); |
a4bd217b | 945 | |
588726d3 JG |
946 | ret = pblk_blk_erase_sync(pblk, ppa); |
947 | if (ret) { | |
a4bd217b | 948 | pr_err("pblk: failed to erase line %d\n", line->id); |
588726d3 | 949 | return ret; |
a4bd217b | 950 | } |
a44f53fa | 951 | } while (1); |
a4bd217b JG |
952 | |
953 | return 0; | |
954 | } | |
955 | ||
dd2a4343 JG |
956 | static void pblk_line_setup_metadata(struct pblk_line *line, |
957 | struct pblk_line_mgmt *l_mg, | |
958 | struct pblk_line_meta *lm) | |
959 | { | |
960 | int meta_line; | |
961 | ||
588726d3 JG |
962 | lockdep_assert_held(&l_mg->free_lock); |
963 | ||
dd2a4343 JG |
964 | retry_meta: |
965 | meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
966 | if (meta_line == PBLK_DATA_LINES) { | |
967 | spin_unlock(&l_mg->free_lock); | |
968 | io_schedule(); | |
969 | spin_lock(&l_mg->free_lock); | |
970 | goto retry_meta; | |
971 | } | |
972 | ||
973 | set_bit(meta_line, &l_mg->meta_bitmap); | |
974 | line->meta_line = meta_line; | |
975 | ||
976 | line->smeta = l_mg->sline_meta[meta_line]; | |
977 | line->emeta = l_mg->eline_meta[meta_line]; | |
978 | ||
979 | memset(line->smeta, 0, lm->smeta_len); | |
980 | memset(line->emeta->buf, 0, lm->emeta_len[0]); | |
981 | ||
982 | line->emeta->mem = 0; | |
983 | atomic_set(&line->emeta->sync, 0); | |
984 | } | |
985 | ||
a4bd217b JG |
986 | /* For now lines are always assumed full lines. Thus, smeta former and current |
987 | * lun bitmaps are omitted. | |
988 | */ | |
dd2a4343 | 989 | static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line, |
a4bd217b JG |
990 | struct pblk_line *cur) |
991 | { | |
992 | struct nvm_tgt_dev *dev = pblk->dev; | |
993 | struct nvm_geo *geo = &dev->geo; | |
994 | struct pblk_line_meta *lm = &pblk->lm; | |
995 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
dd2a4343 JG |
996 | struct pblk_emeta *emeta = line->emeta; |
997 | struct line_emeta *emeta_buf = emeta->buf; | |
998 | struct line_smeta *smeta_buf = (struct line_smeta *)line->smeta; | |
a4bd217b JG |
999 | int nr_blk_line; |
1000 | ||
1001 | /* After erasing the line, new bad blocks might appear and we risk | |
1002 | * having an invalid line | |
1003 | */ | |
1004 | nr_blk_line = lm->blk_per_line - | |
1005 | bitmap_weight(line->blk_bitmap, lm->blk_per_line); | |
1006 | if (nr_blk_line < lm->min_blk_line) { | |
1007 | spin_lock(&l_mg->free_lock); | |
1008 | spin_lock(&line->lock); | |
1009 | line->state = PBLK_LINESTATE_BAD; | |
1010 | spin_unlock(&line->lock); | |
1011 | ||
1012 | list_add_tail(&line->list, &l_mg->bad_list); | |
1013 | spin_unlock(&l_mg->free_lock); | |
1014 | ||
1015 | pr_debug("pblk: line %d is bad\n", line->id); | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | /* Run-time metadata */ | |
dd2a4343 | 1021 | line->lun_bitmap = ((void *)(smeta_buf)) + sizeof(struct line_smeta); |
a4bd217b JG |
1022 | |
1023 | /* Mark LUNs allocated in this line (all for now) */ | |
1024 | bitmap_set(line->lun_bitmap, 0, lm->lun_bitmap_len); | |
1025 | ||
dd2a4343 JG |
1026 | smeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC); |
1027 | memcpy(smeta_buf->header.uuid, pblk->instance_uuid, 16); | |
1028 | smeta_buf->header.id = cpu_to_le32(line->id); | |
1029 | smeta_buf->header.type = cpu_to_le16(line->type); | |
d0ab0b1a HH |
1030 | smeta_buf->header.version_major = SMETA_VERSION_MAJOR; |
1031 | smeta_buf->header.version_minor = SMETA_VERSION_MINOR; | |
a4bd217b JG |
1032 | |
1033 | /* Start metadata */ | |
dd2a4343 | 1034 | smeta_buf->seq_nr = cpu_to_le64(line->seq_nr); |
fae7fae4 | 1035 | smeta_buf->window_wr_lun = cpu_to_le32(geo->all_luns); |
a4bd217b JG |
1036 | |
1037 | /* Fill metadata among lines */ | |
1038 | if (cur) { | |
1039 | memcpy(line->lun_bitmap, cur->lun_bitmap, lm->lun_bitmap_len); | |
dd2a4343 JG |
1040 | smeta_buf->prev_id = cpu_to_le32(cur->id); |
1041 | cur->emeta->buf->next_id = cpu_to_le32(line->id); | |
a4bd217b | 1042 | } else { |
dd2a4343 | 1043 | smeta_buf->prev_id = cpu_to_le32(PBLK_LINE_EMPTY); |
a4bd217b JG |
1044 | } |
1045 | ||
1046 | /* All smeta must be set at this point */ | |
dd2a4343 JG |
1047 | smeta_buf->header.crc = cpu_to_le32( |
1048 | pblk_calc_meta_header_crc(pblk, &smeta_buf->header)); | |
1049 | smeta_buf->crc = cpu_to_le32(pblk_calc_smeta_crc(pblk, smeta_buf)); | |
a4bd217b JG |
1050 | |
1051 | /* End metadata */ | |
dd2a4343 JG |
1052 | memcpy(&emeta_buf->header, &smeta_buf->header, |
1053 | sizeof(struct line_header)); | |
d0ab0b1a HH |
1054 | |
1055 | emeta_buf->header.version_major = EMETA_VERSION_MAJOR; | |
1056 | emeta_buf->header.version_minor = EMETA_VERSION_MINOR; | |
1057 | emeta_buf->header.crc = cpu_to_le32( | |
1058 | pblk_calc_meta_header_crc(pblk, &emeta_buf->header)); | |
1059 | ||
dd2a4343 JG |
1060 | emeta_buf->seq_nr = cpu_to_le64(line->seq_nr); |
1061 | emeta_buf->nr_lbas = cpu_to_le64(line->sec_in_line); | |
1062 | emeta_buf->nr_valid_lbas = cpu_to_le64(0); | |
1063 | emeta_buf->next_id = cpu_to_le32(PBLK_LINE_EMPTY); | |
1064 | emeta_buf->crc = cpu_to_le32(0); | |
1065 | emeta_buf->prev_id = smeta_buf->prev_id; | |
a4bd217b JG |
1066 | |
1067 | return 1; | |
1068 | } | |
1069 | ||
9cfd5a95 JG |
1070 | static int pblk_line_alloc_bitmaps(struct pblk *pblk, struct pblk_line *line) |
1071 | { | |
1072 | struct pblk_line_meta *lm = &pblk->lm; | |
1073 | ||
1074 | line->map_bitmap = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
1075 | if (!line->map_bitmap) | |
1076 | return -ENOMEM; | |
1077 | ||
1078 | /* will be initialized using bb info from map_bitmap */ | |
1079 | line->invalid_bitmap = kmalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
1080 | if (!line->invalid_bitmap) { | |
1081 | kfree(line->map_bitmap); | |
1082 | line->map_bitmap = NULL; | |
1083 | return -ENOMEM; | |
1084 | } | |
1085 | ||
1086 | return 0; | |
1087 | } | |
1088 | ||
a4bd217b JG |
1089 | /* For now lines are always assumed full lines. Thus, smeta former and current |
1090 | * lun bitmaps are omitted. | |
1091 | */ | |
1092 | static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line, | |
1093 | int init) | |
1094 | { | |
1095 | struct nvm_tgt_dev *dev = pblk->dev; | |
1096 | struct nvm_geo *geo = &dev->geo; | |
1097 | struct pblk_line_meta *lm = &pblk->lm; | |
1098 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
a4bd217b JG |
1099 | u64 off; |
1100 | int bit = -1; | |
cfe1c9e2 | 1101 | int emeta_secs; |
a4bd217b JG |
1102 | |
1103 | line->sec_in_line = lm->sec_per_line; | |
1104 | ||
1105 | /* Capture bad block information on line mapping bitmaps */ | |
1106 | while ((bit = find_next_bit(line->blk_bitmap, lm->blk_per_line, | |
1107 | bit + 1)) < lm->blk_per_line) { | |
e46f4e48 | 1108 | off = bit * geo->ws_opt; |
a4bd217b JG |
1109 | bitmap_shift_left(l_mg->bb_aux, l_mg->bb_template, off, |
1110 | lm->sec_per_line); | |
1111 | bitmap_or(line->map_bitmap, line->map_bitmap, l_mg->bb_aux, | |
1112 | lm->sec_per_line); | |
e46f4e48 | 1113 | line->sec_in_line -= geo->clba; |
a4bd217b JG |
1114 | } |
1115 | ||
1116 | /* Mark smeta metadata sectors as bad sectors */ | |
1117 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
e46f4e48 | 1118 | off = bit * geo->ws_opt; |
a4bd217b JG |
1119 | bitmap_set(line->map_bitmap, off, lm->smeta_sec); |
1120 | line->sec_in_line -= lm->smeta_sec; | |
1121 | line->smeta_ssec = off; | |
1122 | line->cur_sec = off + lm->smeta_sec; | |
1123 | ||
e2cddf20 | 1124 | if (init && pblk_line_submit_smeta_io(pblk, line, off, PBLK_WRITE)) { |
a4bd217b | 1125 | pr_debug("pblk: line smeta I/O failed. Retry\n"); |
6cf17a2f | 1126 | return 0; |
a4bd217b JG |
1127 | } |
1128 | ||
1129 | bitmap_copy(line->invalid_bitmap, line->map_bitmap, lm->sec_per_line); | |
1130 | ||
1131 | /* Mark emeta metadata sectors as bad sectors. We need to consider bad | |
1132 | * blocks to make sure that there are enough sectors to store emeta | |
1133 | */ | |
cfe1c9e2 HH |
1134 | emeta_secs = lm->emeta_sec[0]; |
1135 | off = lm->sec_per_line; | |
1136 | while (emeta_secs) { | |
e46f4e48 | 1137 | off -= geo->ws_opt; |
a4bd217b | 1138 | if (!test_bit(off, line->invalid_bitmap)) { |
e46f4e48 JG |
1139 | bitmap_set(line->invalid_bitmap, off, geo->ws_opt); |
1140 | emeta_secs -= geo->ws_opt; | |
a4bd217b JG |
1141 | } |
1142 | } | |
1143 | ||
a4bd217b | 1144 | line->emeta_ssec = off; |
cfe1c9e2 | 1145 | line->sec_in_line -= lm->emeta_sec[0]; |
dd2a4343 | 1146 | line->nr_valid_lbas = 0; |
0880a9aa | 1147 | line->left_msecs = line->sec_in_line; |
dd2a4343 | 1148 | *line->vsc = cpu_to_le32(line->sec_in_line); |
a4bd217b JG |
1149 | |
1150 | if (lm->sec_per_line - line->sec_in_line != | |
1151 | bitmap_weight(line->invalid_bitmap, lm->sec_per_line)) { | |
1152 | spin_lock(&line->lock); | |
1153 | line->state = PBLK_LINESTATE_BAD; | |
1154 | spin_unlock(&line->lock); | |
1155 | ||
1156 | list_add_tail(&line->list, &l_mg->bad_list); | |
1157 | pr_err("pblk: unexpected line %d is bad\n", line->id); | |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | return 1; | |
1163 | } | |
1164 | ||
32ef9412 JG |
1165 | static int pblk_prepare_new_line(struct pblk *pblk, struct pblk_line *line) |
1166 | { | |
1167 | struct pblk_line_meta *lm = &pblk->lm; | |
1168 | struct nvm_tgt_dev *dev = pblk->dev; | |
1169 | struct nvm_geo *geo = &dev->geo; | |
1170 | int blk_to_erase = atomic_read(&line->blk_in_line); | |
1171 | int i; | |
1172 | ||
1173 | for (i = 0; i < lm->blk_per_line; i++) { | |
1174 | struct pblk_lun *rlun = &pblk->luns[i]; | |
1175 | int pos = pblk_ppa_to_pos(geo, rlun->bppa); | |
1176 | int state = line->chks[pos].state; | |
1177 | ||
1178 | /* Free chunks should not be erased */ | |
1179 | if (state & NVM_CHK_ST_FREE) { | |
1180 | set_bit(pblk_ppa_to_pos(geo, rlun->bppa), | |
1181 | line->erase_bitmap); | |
1182 | blk_to_erase--; | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | return blk_to_erase; | |
1187 | } | |
1188 | ||
a4bd217b JG |
1189 | static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line) |
1190 | { | |
1191 | struct pblk_line_meta *lm = &pblk->lm; | |
1d8b33e0 | 1192 | int blk_in_line = atomic_read(&line->blk_in_line); |
9cfd5a95 | 1193 | int blk_to_erase; |
a4bd217b | 1194 | |
32ef9412 JG |
1195 | /* Bad blocks do not need to be erased */ |
1196 | bitmap_copy(line->erase_bitmap, line->blk_bitmap, lm->blk_per_line); | |
1197 | ||
a4bd217b | 1198 | spin_lock(&line->lock); |
32ef9412 JG |
1199 | |
1200 | /* If we have not written to this line, we need to mark up free chunks | |
1201 | * as already erased | |
1202 | */ | |
1203 | if (line->state == PBLK_LINESTATE_NEW) { | |
1204 | blk_to_erase = pblk_prepare_new_line(pblk, line); | |
1205 | line->state = PBLK_LINESTATE_FREE; | |
1206 | } else { | |
1d8b33e0 JG |
1207 | blk_to_erase = blk_in_line; |
1208 | } | |
1209 | ||
1210 | if (blk_in_line < lm->min_blk_line) { | |
9cfd5a95 JG |
1211 | spin_unlock(&line->lock); |
1212 | return -EAGAIN; | |
32ef9412 JG |
1213 | } |
1214 | ||
a4bd217b | 1215 | if (line->state != PBLK_LINESTATE_FREE) { |
588726d3 JG |
1216 | WARN(1, "pblk: corrupted line %d, state %d\n", |
1217 | line->id, line->state); | |
9cfd5a95 JG |
1218 | spin_unlock(&line->lock); |
1219 | return -EINTR; | |
a4bd217b | 1220 | } |
588726d3 | 1221 | |
a4bd217b | 1222 | line->state = PBLK_LINESTATE_OPEN; |
a44f53fa | 1223 | |
32ef9412 JG |
1224 | atomic_set(&line->left_eblks, blk_to_erase); |
1225 | atomic_set(&line->left_seblks, blk_to_erase); | |
dd2a4343 JG |
1226 | |
1227 | line->meta_distance = lm->meta_distance; | |
a4bd217b JG |
1228 | spin_unlock(&line->lock); |
1229 | ||
a4bd217b JG |
1230 | kref_init(&line->ref); |
1231 | ||
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line) | |
1236 | { | |
1237 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1238 | int ret; | |
1239 | ||
1240 | spin_lock(&l_mg->free_lock); | |
1241 | l_mg->data_line = line; | |
1242 | list_del(&line->list); | |
a4bd217b JG |
1243 | |
1244 | ret = pblk_line_prepare(pblk, line); | |
1245 | if (ret) { | |
1246 | list_add(&line->list, &l_mg->free_list); | |
3dc001f3 | 1247 | spin_unlock(&l_mg->free_lock); |
a4bd217b JG |
1248 | return ret; |
1249 | } | |
3dc001f3 | 1250 | spin_unlock(&l_mg->free_lock); |
a4bd217b | 1251 | |
9cfd5a95 JG |
1252 | ret = pblk_line_alloc_bitmaps(pblk, line); |
1253 | if (ret) | |
1254 | return ret; | |
a4bd217b JG |
1255 | |
1256 | if (!pblk_line_init_bb(pblk, line, 0)) { | |
1257 | list_add(&line->list, &l_mg->free_list); | |
1258 | return -EINTR; | |
1259 | } | |
1260 | ||
9cfd5a95 | 1261 | pblk_rl_free_lines_dec(&pblk->rl, line, true); |
a4bd217b JG |
1262 | return 0; |
1263 | } | |
1264 | ||
1265 | void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line) | |
1266 | { | |
e72ec1d3 | 1267 | kfree(line->map_bitmap); |
a4bd217b JG |
1268 | line->map_bitmap = NULL; |
1269 | line->smeta = NULL; | |
1270 | line->emeta = NULL; | |
1271 | } | |
1272 | ||
9cfd5a95 JG |
1273 | static void pblk_line_reinit(struct pblk_line *line) |
1274 | { | |
1275 | *line->vsc = cpu_to_le32(EMPTY_ENTRY); | |
1276 | ||
1277 | line->map_bitmap = NULL; | |
1278 | line->invalid_bitmap = NULL; | |
1279 | line->smeta = NULL; | |
1280 | line->emeta = NULL; | |
1281 | } | |
1282 | ||
1283 | void pblk_line_free(struct pblk_line *line) | |
1284 | { | |
1285 | kfree(line->map_bitmap); | |
1286 | kfree(line->invalid_bitmap); | |
1287 | ||
1288 | pblk_line_reinit(line); | |
1289 | } | |
1290 | ||
a4bd217b JG |
1291 | struct pblk_line *pblk_line_get(struct pblk *pblk) |
1292 | { | |
1293 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1294 | struct pblk_line_meta *lm = &pblk->lm; | |
588726d3 JG |
1295 | struct pblk_line *line; |
1296 | int ret, bit; | |
a4bd217b JG |
1297 | |
1298 | lockdep_assert_held(&l_mg->free_lock); | |
1299 | ||
588726d3 | 1300 | retry: |
a4bd217b JG |
1301 | if (list_empty(&l_mg->free_list)) { |
1302 | pr_err("pblk: no free lines\n"); | |
588726d3 | 1303 | return NULL; |
a4bd217b JG |
1304 | } |
1305 | ||
1306 | line = list_first_entry(&l_mg->free_list, struct pblk_line, list); | |
1307 | list_del(&line->list); | |
1308 | l_mg->nr_free_lines--; | |
1309 | ||
1310 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
1311 | if (unlikely(bit >= lm->blk_per_line)) { | |
1312 | spin_lock(&line->lock); | |
1313 | line->state = PBLK_LINESTATE_BAD; | |
1314 | spin_unlock(&line->lock); | |
1315 | ||
1316 | list_add_tail(&line->list, &l_mg->bad_list); | |
1317 | ||
1318 | pr_debug("pblk: line %d is bad\n", line->id); | |
588726d3 | 1319 | goto retry; |
a4bd217b JG |
1320 | } |
1321 | ||
588726d3 JG |
1322 | ret = pblk_line_prepare(pblk, line); |
1323 | if (ret) { | |
1d8b33e0 JG |
1324 | switch (ret) { |
1325 | case -EAGAIN: | |
1326 | list_add(&line->list, &l_mg->bad_list); | |
1327 | goto retry; | |
1328 | case -EINTR: | |
588726d3 JG |
1329 | list_add(&line->list, &l_mg->corrupt_list); |
1330 | goto retry; | |
1d8b33e0 | 1331 | default: |
588726d3 JG |
1332 | pr_err("pblk: failed to prepare line %d\n", line->id); |
1333 | list_add(&line->list, &l_mg->free_list); | |
1334 | l_mg->nr_free_lines++; | |
1335 | return NULL; | |
1336 | } | |
a4bd217b JG |
1337 | } |
1338 | ||
a4bd217b JG |
1339 | return line; |
1340 | } | |
1341 | ||
1342 | static struct pblk_line *pblk_line_retry(struct pblk *pblk, | |
1343 | struct pblk_line *line) | |
1344 | { | |
1345 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1346 | struct pblk_line *retry_line; | |
1347 | ||
588726d3 | 1348 | retry: |
a4bd217b JG |
1349 | spin_lock(&l_mg->free_lock); |
1350 | retry_line = pblk_line_get(pblk); | |
1351 | if (!retry_line) { | |
be388d9f | 1352 | l_mg->data_line = NULL; |
a4bd217b JG |
1353 | spin_unlock(&l_mg->free_lock); |
1354 | return NULL; | |
1355 | } | |
1356 | ||
9cfd5a95 JG |
1357 | retry_line->map_bitmap = line->map_bitmap; |
1358 | retry_line->invalid_bitmap = line->invalid_bitmap; | |
a4bd217b JG |
1359 | retry_line->smeta = line->smeta; |
1360 | retry_line->emeta = line->emeta; | |
1361 | retry_line->meta_line = line->meta_line; | |
a4bd217b | 1362 | |
9cfd5a95 JG |
1363 | pblk_line_reinit(line); |
1364 | ||
3dc001f3 | 1365 | l_mg->data_line = retry_line; |
a4bd217b JG |
1366 | spin_unlock(&l_mg->free_lock); |
1367 | ||
a7689938 | 1368 | pblk_rl_free_lines_dec(&pblk->rl, line, false); |
a4bd217b | 1369 | |
588726d3 JG |
1370 | if (pblk_line_erase(pblk, retry_line)) |
1371 | goto retry; | |
1372 | ||
a4bd217b JG |
1373 | return retry_line; |
1374 | } | |
1375 | ||
588726d3 JG |
1376 | static void pblk_set_space_limit(struct pblk *pblk) |
1377 | { | |
1378 | struct pblk_rl *rl = &pblk->rl; | |
1379 | ||
1380 | atomic_set(&rl->rb_space, 0); | |
1381 | } | |
1382 | ||
a4bd217b JG |
1383 | struct pblk_line *pblk_line_get_first_data(struct pblk *pblk) |
1384 | { | |
1385 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1386 | struct pblk_line *line; | |
a4bd217b JG |
1387 | |
1388 | spin_lock(&l_mg->free_lock); | |
1389 | line = pblk_line_get(pblk); | |
1390 | if (!line) { | |
1391 | spin_unlock(&l_mg->free_lock); | |
1392 | return NULL; | |
1393 | } | |
1394 | ||
1395 | line->seq_nr = l_mg->d_seq_nr++; | |
1396 | line->type = PBLK_LINETYPE_DATA; | |
1397 | l_mg->data_line = line; | |
1398 | ||
dd2a4343 | 1399 | pblk_line_setup_metadata(line, l_mg, &pblk->lm); |
a4bd217b JG |
1400 | |
1401 | /* Allocate next line for preparation */ | |
1402 | l_mg->data_next = pblk_line_get(pblk); | |
588726d3 JG |
1403 | if (!l_mg->data_next) { |
1404 | /* If we cannot get a new line, we need to stop the pipeline. | |
1405 | * Only allow as many writes in as we can store safely and then | |
1406 | * fail gracefully | |
1407 | */ | |
1408 | pblk_set_space_limit(pblk); | |
1409 | ||
1410 | l_mg->data_next = NULL; | |
1411 | } else { | |
a4bd217b JG |
1412 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; |
1413 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
a4bd217b JG |
1414 | } |
1415 | spin_unlock(&l_mg->free_lock); | |
1416 | ||
9cfd5a95 JG |
1417 | if (pblk_line_alloc_bitmaps(pblk, line)) |
1418 | return NULL; | |
1419 | ||
588726d3 JG |
1420 | if (pblk_line_erase(pblk, line)) { |
1421 | line = pblk_line_retry(pblk, line); | |
1422 | if (!line) | |
1423 | return NULL; | |
1424 | } | |
1425 | ||
a4bd217b | 1426 | retry_setup: |
dd2a4343 | 1427 | if (!pblk_line_init_metadata(pblk, line, NULL)) { |
a4bd217b JG |
1428 | line = pblk_line_retry(pblk, line); |
1429 | if (!line) | |
1430 | return NULL; | |
1431 | ||
1432 | goto retry_setup; | |
1433 | } | |
1434 | ||
1435 | if (!pblk_line_init_bb(pblk, line, 1)) { | |
1436 | line = pblk_line_retry(pblk, line); | |
1437 | if (!line) | |
1438 | return NULL; | |
1439 | ||
1440 | goto retry_setup; | |
1441 | } | |
1442 | ||
a7689938 JG |
1443 | pblk_rl_free_lines_dec(&pblk->rl, line, true); |
1444 | ||
a4bd217b JG |
1445 | return line; |
1446 | } | |
1447 | ||
588726d3 JG |
1448 | static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line) |
1449 | { | |
1450 | lockdep_assert_held(&pblk->l_mg.free_lock); | |
1451 | ||
1452 | pblk_set_space_limit(pblk); | |
1453 | pblk->state = PBLK_STATE_STOPPING; | |
1454 | } | |
1455 | ||
8bd40020 JG |
1456 | static void pblk_line_close_meta_sync(struct pblk *pblk) |
1457 | { | |
1458 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1459 | struct pblk_line_meta *lm = &pblk->lm; | |
1460 | struct pblk_line *line, *tline; | |
1461 | LIST_HEAD(list); | |
1462 | ||
1463 | spin_lock(&l_mg->close_lock); | |
1464 | if (list_empty(&l_mg->emeta_list)) { | |
1465 | spin_unlock(&l_mg->close_lock); | |
1466 | return; | |
1467 | } | |
1468 | ||
1469 | list_cut_position(&list, &l_mg->emeta_list, l_mg->emeta_list.prev); | |
1470 | spin_unlock(&l_mg->close_lock); | |
1471 | ||
1472 | list_for_each_entry_safe(line, tline, &list, list) { | |
1473 | struct pblk_emeta *emeta = line->emeta; | |
1474 | ||
1475 | while (emeta->mem < lm->emeta_len[0]) { | |
1476 | int ret; | |
1477 | ||
1478 | ret = pblk_submit_meta_io(pblk, line); | |
1479 | if (ret) { | |
1480 | pr_err("pblk: sync meta line %d failed (%d)\n", | |
1481 | line->id, ret); | |
1482 | return; | |
1483 | } | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | pblk_wait_for_meta(pblk); | |
1488 | flush_workqueue(pblk->close_wq); | |
1489 | } | |
1490 | ||
a7c9e910 | 1491 | void __pblk_pipeline_flush(struct pblk *pblk) |
588726d3 JG |
1492 | { |
1493 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1494 | int ret; | |
1495 | ||
1496 | spin_lock(&l_mg->free_lock); | |
1497 | if (pblk->state == PBLK_STATE_RECOVERING || | |
1498 | pblk->state == PBLK_STATE_STOPPED) { | |
1499 | spin_unlock(&l_mg->free_lock); | |
1500 | return; | |
1501 | } | |
1502 | pblk->state = PBLK_STATE_RECOVERING; | |
1503 | spin_unlock(&l_mg->free_lock); | |
1504 | ||
1505 | pblk_flush_writer(pblk); | |
1506 | pblk_wait_for_meta(pblk); | |
1507 | ||
1508 | ret = pblk_recov_pad(pblk); | |
1509 | if (ret) { | |
1510 | pr_err("pblk: could not close data on teardown(%d)\n", ret); | |
1511 | return; | |
1512 | } | |
1513 | ||
ee8d5c1a | 1514 | flush_workqueue(pblk->bb_wq); |
588726d3 | 1515 | pblk_line_close_meta_sync(pblk); |
a7c9e910 JG |
1516 | } |
1517 | ||
1518 | void __pblk_pipeline_stop(struct pblk *pblk) | |
1519 | { | |
1520 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
588726d3 JG |
1521 | |
1522 | spin_lock(&l_mg->free_lock); | |
1523 | pblk->state = PBLK_STATE_STOPPED; | |
1524 | l_mg->data_line = NULL; | |
1525 | l_mg->data_next = NULL; | |
1526 | spin_unlock(&l_mg->free_lock); | |
1527 | } | |
1528 | ||
a7c9e910 JG |
1529 | void pblk_pipeline_stop(struct pblk *pblk) |
1530 | { | |
1531 | __pblk_pipeline_flush(pblk); | |
1532 | __pblk_pipeline_stop(pblk); | |
1533 | } | |
1534 | ||
21d22871 | 1535 | struct pblk_line *pblk_line_replace_data(struct pblk *pblk) |
a4bd217b | 1536 | { |
a4bd217b | 1537 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
21d22871 | 1538 | struct pblk_line *cur, *new = NULL; |
a4bd217b | 1539 | unsigned int left_seblks; |
a4bd217b JG |
1540 | |
1541 | cur = l_mg->data_line; | |
1542 | new = l_mg->data_next; | |
1543 | if (!new) | |
21d22871 | 1544 | goto out; |
a4bd217b JG |
1545 | l_mg->data_line = new; |
1546 | ||
588726d3 | 1547 | spin_lock(&l_mg->free_lock); |
588726d3 JG |
1548 | pblk_line_setup_metadata(new, l_mg, &pblk->lm); |
1549 | spin_unlock(&l_mg->free_lock); | |
1550 | ||
1551 | retry_erase: | |
a4bd217b JG |
1552 | left_seblks = atomic_read(&new->left_seblks); |
1553 | if (left_seblks) { | |
1554 | /* If line is not fully erased, erase it */ | |
a44f53fa | 1555 | if (atomic_read(&new->left_eblks)) { |
a4bd217b | 1556 | if (pblk_line_erase(pblk, new)) |
21d22871 | 1557 | goto out; |
a4bd217b JG |
1558 | } else { |
1559 | io_schedule(); | |
1560 | } | |
588726d3 | 1561 | goto retry_erase; |
a4bd217b JG |
1562 | } |
1563 | ||
9cfd5a95 JG |
1564 | if (pblk_line_alloc_bitmaps(pblk, new)) |
1565 | return NULL; | |
1566 | ||
a4bd217b | 1567 | retry_setup: |
dd2a4343 | 1568 | if (!pblk_line_init_metadata(pblk, new, cur)) { |
a4bd217b | 1569 | new = pblk_line_retry(pblk, new); |
f3236cef | 1570 | if (!new) |
21d22871 | 1571 | goto out; |
a4bd217b JG |
1572 | |
1573 | goto retry_setup; | |
1574 | } | |
1575 | ||
1576 | if (!pblk_line_init_bb(pblk, new, 1)) { | |
1577 | new = pblk_line_retry(pblk, new); | |
1578 | if (!new) | |
21d22871 | 1579 | goto out; |
a4bd217b JG |
1580 | |
1581 | goto retry_setup; | |
1582 | } | |
1583 | ||
a7689938 JG |
1584 | pblk_rl_free_lines_dec(&pblk->rl, new, true); |
1585 | ||
588726d3 JG |
1586 | /* Allocate next line for preparation */ |
1587 | spin_lock(&l_mg->free_lock); | |
1588 | l_mg->data_next = pblk_line_get(pblk); | |
1589 | if (!l_mg->data_next) { | |
1590 | /* If we cannot get a new line, we need to stop the pipeline. | |
1591 | * Only allow as many writes in as we can store safely and then | |
1592 | * fail gracefully | |
1593 | */ | |
1594 | pblk_stop_writes(pblk, new); | |
1595 | l_mg->data_next = NULL; | |
1596 | } else { | |
1597 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; | |
1598 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
588726d3 JG |
1599 | } |
1600 | spin_unlock(&l_mg->free_lock); | |
1601 | ||
21d22871 JG |
1602 | out: |
1603 | return new; | |
a4bd217b JG |
1604 | } |
1605 | ||
7bd4d370 | 1606 | static void __pblk_line_put(struct pblk *pblk, struct pblk_line *line) |
a4bd217b | 1607 | { |
a4bd217b | 1608 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
d6b992f7 | 1609 | struct pblk_gc *gc = &pblk->gc; |
a4bd217b JG |
1610 | |
1611 | spin_lock(&line->lock); | |
1612 | WARN_ON(line->state != PBLK_LINESTATE_GC); | |
1613 | line->state = PBLK_LINESTATE_FREE; | |
1614 | line->gc_group = PBLK_LINEGC_NONE; | |
8e55c07b | 1615 | pblk_line_free(line); |
a4bd217b | 1616 | |
48b8d208 HH |
1617 | if (line->w_err_gc->has_write_err) { |
1618 | pblk_rl_werr_line_out(&pblk->rl); | |
1619 | line->w_err_gc->has_write_err = 0; | |
1620 | } | |
1621 | ||
1622 | spin_unlock(&line->lock); | |
d6b992f7 HH |
1623 | atomic_dec(&gc->pipeline_gc); |
1624 | ||
a4bd217b JG |
1625 | spin_lock(&l_mg->free_lock); |
1626 | list_add_tail(&line->list, &l_mg->free_list); | |
1627 | l_mg->nr_free_lines++; | |
1628 | spin_unlock(&l_mg->free_lock); | |
1629 | ||
1630 | pblk_rl_free_lines_inc(&pblk->rl, line); | |
1631 | } | |
1632 | ||
7bd4d370 JG |
1633 | static void pblk_line_put_ws(struct work_struct *work) |
1634 | { | |
1635 | struct pblk_line_ws *line_put_ws = container_of(work, | |
1636 | struct pblk_line_ws, ws); | |
1637 | struct pblk *pblk = line_put_ws->pblk; | |
1638 | struct pblk_line *line = line_put_ws->line; | |
1639 | ||
1640 | __pblk_line_put(pblk, line); | |
b906bbb6 | 1641 | mempool_free(line_put_ws, &pblk->gen_ws_pool); |
7bd4d370 JG |
1642 | } |
1643 | ||
1644 | void pblk_line_put(struct kref *ref) | |
1645 | { | |
1646 | struct pblk_line *line = container_of(ref, struct pblk_line, ref); | |
1647 | struct pblk *pblk = line->pblk; | |
1648 | ||
1649 | __pblk_line_put(pblk, line); | |
1650 | } | |
1651 | ||
1652 | void pblk_line_put_wq(struct kref *ref) | |
1653 | { | |
1654 | struct pblk_line *line = container_of(ref, struct pblk_line, ref); | |
1655 | struct pblk *pblk = line->pblk; | |
1656 | struct pblk_line_ws *line_put_ws; | |
1657 | ||
b906bbb6 | 1658 | line_put_ws = mempool_alloc(&pblk->gen_ws_pool, GFP_ATOMIC); |
7bd4d370 JG |
1659 | if (!line_put_ws) |
1660 | return; | |
1661 | ||
1662 | line_put_ws->pblk = pblk; | |
1663 | line_put_ws->line = line; | |
1664 | line_put_ws->priv = NULL; | |
1665 | ||
1666 | INIT_WORK(&line_put_ws->ws, pblk_line_put_ws); | |
1667 | queue_work(pblk->r_end_wq, &line_put_ws->ws); | |
1668 | } | |
1669 | ||
a4bd217b JG |
1670 | int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa) |
1671 | { | |
1672 | struct nvm_rq *rqd; | |
1673 | int err; | |
1674 | ||
67bf26a3 | 1675 | rqd = pblk_alloc_rqd(pblk, PBLK_ERASE); |
a4bd217b JG |
1676 | |
1677 | pblk_setup_e_rq(pblk, rqd, ppa); | |
1678 | ||
1679 | rqd->end_io = pblk_end_io_erase; | |
1680 | rqd->private = pblk; | |
1681 | ||
1682 | /* The write thread schedules erases so that it minimizes disturbances | |
1683 | * with writes. Thus, there is no need to take the LUN semaphore. | |
1684 | */ | |
1685 | err = pblk_submit_io(pblk, rqd); | |
1686 | if (err) { | |
1687 | struct nvm_tgt_dev *dev = pblk->dev; | |
1688 | struct nvm_geo *geo = &dev->geo; | |
1689 | ||
1690 | pr_err("pblk: could not async erase line:%d,blk:%d\n", | |
b1bcfda1 JG |
1691 | pblk_ppa_to_line(ppa), |
1692 | pblk_ppa_to_pos(geo, ppa)); | |
a4bd217b JG |
1693 | } |
1694 | ||
1695 | return err; | |
1696 | } | |
1697 | ||
1698 | struct pblk_line *pblk_line_get_data(struct pblk *pblk) | |
1699 | { | |
1700 | return pblk->l_mg.data_line; | |
1701 | } | |
1702 | ||
d624f371 JG |
1703 | /* For now, always erase next line */ |
1704 | struct pblk_line *pblk_line_get_erase(struct pblk *pblk) | |
a4bd217b JG |
1705 | { |
1706 | return pblk->l_mg.data_next; | |
1707 | } | |
1708 | ||
1709 | int pblk_line_is_full(struct pblk_line *line) | |
1710 | { | |
1711 | return (line->left_msecs == 0); | |
1712 | } | |
1713 | ||
588726d3 JG |
1714 | static void pblk_line_should_sync_meta(struct pblk *pblk) |
1715 | { | |
1716 | if (pblk_rl_is_limit(&pblk->rl)) | |
1717 | pblk_line_close_meta_sync(pblk); | |
1718 | } | |
1719 | ||
a4bd217b JG |
1720 | void pblk_line_close(struct pblk *pblk, struct pblk_line *line) |
1721 | { | |
32ef9412 JG |
1722 | struct nvm_tgt_dev *dev = pblk->dev; |
1723 | struct nvm_geo *geo = &dev->geo; | |
1724 | struct pblk_line_meta *lm = &pblk->lm; | |
a4bd217b JG |
1725 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
1726 | struct list_head *move_list; | |
32ef9412 | 1727 | int i; |
a4bd217b | 1728 | |
a84ebb83 | 1729 | #ifdef CONFIG_NVM_DEBUG |
dd2a4343 | 1730 | WARN(!bitmap_full(line->map_bitmap, lm->sec_per_line), |
a4bd217b | 1731 | "pblk: corrupt closed line %d\n", line->id); |
a84ebb83 | 1732 | #endif |
a4bd217b JG |
1733 | |
1734 | spin_lock(&l_mg->free_lock); | |
1735 | WARN_ON(!test_and_clear_bit(line->meta_line, &l_mg->meta_bitmap)); | |
1736 | spin_unlock(&l_mg->free_lock); | |
1737 | ||
1738 | spin_lock(&l_mg->gc_lock); | |
1739 | spin_lock(&line->lock); | |
1740 | WARN_ON(line->state != PBLK_LINESTATE_OPEN); | |
1741 | line->state = PBLK_LINESTATE_CLOSED; | |
1742 | move_list = pblk_line_gc_list(pblk, line); | |
1743 | ||
1744 | list_add_tail(&line->list, move_list); | |
1745 | ||
e72ec1d3 | 1746 | kfree(line->map_bitmap); |
a4bd217b JG |
1747 | line->map_bitmap = NULL; |
1748 | line->smeta = NULL; | |
1749 | line->emeta = NULL; | |
1750 | ||
32ef9412 JG |
1751 | for (i = 0; i < lm->blk_per_line; i++) { |
1752 | struct pblk_lun *rlun = &pblk->luns[i]; | |
1753 | int pos = pblk_ppa_to_pos(geo, rlun->bppa); | |
1754 | int state = line->chks[pos].state; | |
1755 | ||
1756 | if (!(state & NVM_CHK_ST_OFFLINE)) | |
1757 | state = NVM_CHK_ST_CLOSED; | |
1758 | } | |
1759 | ||
a4bd217b JG |
1760 | spin_unlock(&line->lock); |
1761 | spin_unlock(&l_mg->gc_lock); | |
1762 | } | |
1763 | ||
dd2a4343 JG |
1764 | void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line) |
1765 | { | |
1766 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1767 | struct pblk_line_meta *lm = &pblk->lm; | |
1768 | struct pblk_emeta *emeta = line->emeta; | |
1769 | struct line_emeta *emeta_buf = emeta->buf; | |
76758390 | 1770 | struct wa_counters *wa = emeta_to_wa(lm, emeta_buf); |
dd2a4343 | 1771 | |
588726d3 | 1772 | /* No need for exact vsc value; avoid a big line lock and take aprox. */ |
dd2a4343 JG |
1773 | memcpy(emeta_to_vsc(pblk, emeta_buf), l_mg->vsc_list, lm->vsc_list_len); |
1774 | memcpy(emeta_to_bb(emeta_buf), line->blk_bitmap, lm->blk_bitmap_len); | |
1775 | ||
76758390 HH |
1776 | wa->user = cpu_to_le64(atomic64_read(&pblk->user_wa)); |
1777 | wa->pad = cpu_to_le64(atomic64_read(&pblk->pad_wa)); | |
1778 | wa->gc = cpu_to_le64(atomic64_read(&pblk->gc_wa)); | |
1779 | ||
dd2a4343 JG |
1780 | emeta_buf->nr_valid_lbas = cpu_to_le64(line->nr_valid_lbas); |
1781 | emeta_buf->crc = cpu_to_le32(pblk_calc_emeta_crc(pblk, emeta_buf)); | |
1782 | ||
1783 | spin_lock(&l_mg->close_lock); | |
1784 | spin_lock(&line->lock); | |
48b8d208 HH |
1785 | |
1786 | /* Update the in-memory start address for emeta, in case it has | |
1787 | * shifted due to write errors | |
1788 | */ | |
1789 | if (line->emeta_ssec != line->cur_sec) | |
1790 | line->emeta_ssec = line->cur_sec; | |
1791 | ||
dd2a4343 JG |
1792 | list_add_tail(&line->list, &l_mg->emeta_list); |
1793 | spin_unlock(&line->lock); | |
1794 | spin_unlock(&l_mg->close_lock); | |
588726d3 JG |
1795 | |
1796 | pblk_line_should_sync_meta(pblk); | |
48b8d208 HH |
1797 | |
1798 | ||
1799 | } | |
1800 | ||
1801 | static void pblk_save_lba_list(struct pblk *pblk, struct pblk_line *line) | |
1802 | { | |
1803 | struct pblk_line_meta *lm = &pblk->lm; | |
1804 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1805 | unsigned int lba_list_size = lm->emeta_len[2]; | |
1806 | struct pblk_w_err_gc *w_err_gc = line->w_err_gc; | |
1807 | struct pblk_emeta *emeta = line->emeta; | |
1808 | ||
1809 | w_err_gc->lba_list = pblk_malloc(lba_list_size, | |
1810 | l_mg->emeta_alloc_type, GFP_KERNEL); | |
1811 | memcpy(w_err_gc->lba_list, emeta_to_lbas(pblk, emeta->buf), | |
1812 | lba_list_size); | |
dd2a4343 JG |
1813 | } |
1814 | ||
a4bd217b JG |
1815 | void pblk_line_close_ws(struct work_struct *work) |
1816 | { | |
1817 | struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws, | |
1818 | ws); | |
1819 | struct pblk *pblk = line_ws->pblk; | |
1820 | struct pblk_line *line = line_ws->line; | |
48b8d208 HH |
1821 | struct pblk_w_err_gc *w_err_gc = line->w_err_gc; |
1822 | ||
1823 | /* Write errors makes the emeta start address stored in smeta invalid, | |
1824 | * so keep a copy of the lba list until we've gc'd the line | |
1825 | */ | |
1826 | if (w_err_gc->has_write_err) | |
1827 | pblk_save_lba_list(pblk, line); | |
a4bd217b JG |
1828 | |
1829 | pblk_line_close(pblk, line); | |
b906bbb6 | 1830 | mempool_free(line_ws, &pblk->gen_ws_pool); |
a4bd217b JG |
1831 | } |
1832 | ||
b84ae4a8 JG |
1833 | void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv, |
1834 | void (*work)(struct work_struct *), gfp_t gfp_mask, | |
ef576494 | 1835 | struct workqueue_struct *wq) |
a4bd217b JG |
1836 | { |
1837 | struct pblk_line_ws *line_ws; | |
1838 | ||
b906bbb6 | 1839 | line_ws = mempool_alloc(&pblk->gen_ws_pool, gfp_mask); |
a4bd217b JG |
1840 | |
1841 | line_ws->pblk = pblk; | |
1842 | line_ws->line = line; | |
1843 | line_ws->priv = priv; | |
1844 | ||
1845 | INIT_WORK(&line_ws->ws, work); | |
ef576494 | 1846 | queue_work(wq, &line_ws->ws); |
a4bd217b JG |
1847 | } |
1848 | ||
3eaa11e2 JG |
1849 | static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, |
1850 | int nr_ppas, int pos) | |
a4bd217b | 1851 | { |
3eaa11e2 | 1852 | struct pblk_lun *rlun = &pblk->luns[pos]; |
a4bd217b JG |
1853 | int ret; |
1854 | ||
1855 | /* | |
1856 | * Only send one inflight I/O per LUN. Since we map at a page | |
1857 | * granurality, all ppas in the I/O will map to the same LUN | |
1858 | */ | |
1859 | #ifdef CONFIG_NVM_DEBUG | |
1860 | int i; | |
1861 | ||
1862 | for (i = 1; i < nr_ppas; i++) | |
69471513 JG |
1863 | WARN_ON(ppa_list[0].a.lun != ppa_list[i].a.lun || |
1864 | ppa_list[0].a.ch != ppa_list[i].a.ch); | |
a4bd217b | 1865 | #endif |
a4bd217b | 1866 | |
3eaa11e2 | 1867 | ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000)); |
c5493845 RP |
1868 | if (ret == -ETIME || ret == -EINTR) |
1869 | pr_err("pblk: taking lun semaphore timed out: err %d\n", -ret); | |
a4bd217b JG |
1870 | } |
1871 | ||
3eaa11e2 JG |
1872 | void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas) |
1873 | { | |
1874 | struct nvm_tgt_dev *dev = pblk->dev; | |
1875 | struct nvm_geo *geo = &dev->geo; | |
1876 | int pos = pblk_ppa_to_pos(geo, ppa_list[0]); | |
1877 | ||
1878 | __pblk_down_page(pblk, ppa_list, nr_ppas, pos); | |
1879 | } | |
1880 | ||
1881 | void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, | |
1882 | unsigned long *lun_bitmap) | |
1883 | { | |
1884 | struct nvm_tgt_dev *dev = pblk->dev; | |
1885 | struct nvm_geo *geo = &dev->geo; | |
1886 | int pos = pblk_ppa_to_pos(geo, ppa_list[0]); | |
1887 | ||
1888 | /* If the LUN has been locked for this same request, do no attempt to | |
1889 | * lock it again | |
1890 | */ | |
1891 | if (test_and_set_bit(pos, lun_bitmap)) | |
1892 | return; | |
1893 | ||
1894 | __pblk_down_page(pblk, ppa_list, nr_ppas, pos); | |
1895 | } | |
1896 | ||
1897 | void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas) | |
1898 | { | |
1899 | struct nvm_tgt_dev *dev = pblk->dev; | |
1900 | struct nvm_geo *geo = &dev->geo; | |
1901 | struct pblk_lun *rlun; | |
1902 | int pos = pblk_ppa_to_pos(geo, ppa_list[0]); | |
1903 | ||
1904 | #ifdef CONFIG_NVM_DEBUG | |
1905 | int i; | |
1906 | ||
1907 | for (i = 1; i < nr_ppas; i++) | |
69471513 JG |
1908 | WARN_ON(ppa_list[0].a.lun != ppa_list[i].a.lun || |
1909 | ppa_list[0].a.ch != ppa_list[i].a.ch); | |
3eaa11e2 JG |
1910 | #endif |
1911 | ||
1912 | rlun = &pblk->luns[pos]; | |
1913 | up(&rlun->wr_sem); | |
1914 | } | |
1915 | ||
a4bd217b JG |
1916 | void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, |
1917 | unsigned long *lun_bitmap) | |
1918 | { | |
1919 | struct nvm_tgt_dev *dev = pblk->dev; | |
1920 | struct nvm_geo *geo = &dev->geo; | |
1921 | struct pblk_lun *rlun; | |
a40afad9 | 1922 | int num_lun = geo->all_luns; |
a4bd217b JG |
1923 | int bit = -1; |
1924 | ||
a40afad9 | 1925 | while ((bit = find_next_bit(lun_bitmap, num_lun, bit + 1)) < num_lun) { |
a4bd217b JG |
1926 | rlun = &pblk->luns[bit]; |
1927 | up(&rlun->wr_sem); | |
1928 | } | |
a4bd217b JG |
1929 | } |
1930 | ||
1931 | void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa) | |
1932 | { | |
9f6cb13b | 1933 | struct ppa_addr ppa_l2p; |
a4bd217b JG |
1934 | |
1935 | /* logic error: lba out-of-bounds. Ignore update */ | |
1936 | if (!(lba < pblk->rl.nr_secs)) { | |
1937 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1938 | return; | |
1939 | } | |
1940 | ||
1941 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 1942 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
a4bd217b | 1943 | |
9f6cb13b JG |
1944 | if (!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p)) |
1945 | pblk_map_invalidate(pblk, ppa_l2p); | |
a4bd217b JG |
1946 | |
1947 | pblk_trans_map_set(pblk, lba, ppa); | |
1948 | spin_unlock(&pblk->trans_lock); | |
1949 | } | |
1950 | ||
1951 | void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa) | |
1952 | { | |
d340121e | 1953 | |
a4bd217b JG |
1954 | #ifdef CONFIG_NVM_DEBUG |
1955 | /* Callers must ensure that the ppa points to a cache address */ | |
1956 | BUG_ON(!pblk_addr_in_cache(ppa)); | |
1957 | BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa))); | |
1958 | #endif | |
1959 | ||
1960 | pblk_update_map(pblk, lba, ppa); | |
1961 | } | |
1962 | ||
9f6cb13b | 1963 | int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa_new, |
d340121e | 1964 | struct pblk_line *gc_line, u64 paddr_gc) |
a4bd217b | 1965 | { |
d340121e | 1966 | struct ppa_addr ppa_l2p, ppa_gc; |
a4bd217b JG |
1967 | int ret = 1; |
1968 | ||
1969 | #ifdef CONFIG_NVM_DEBUG | |
1970 | /* Callers must ensure that the ppa points to a cache address */ | |
9f6cb13b JG |
1971 | BUG_ON(!pblk_addr_in_cache(ppa_new)); |
1972 | BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa_new))); | |
a4bd217b JG |
1973 | #endif |
1974 | ||
1975 | /* logic error: lba out-of-bounds. Ignore update */ | |
1976 | if (!(lba < pblk->rl.nr_secs)) { | |
1977 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 1982 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
d340121e | 1983 | ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, gc_line->id); |
a4bd217b | 1984 | |
d340121e JG |
1985 | if (!pblk_ppa_comp(ppa_l2p, ppa_gc)) { |
1986 | spin_lock(&gc_line->lock); | |
1987 | WARN(!test_bit(paddr_gc, gc_line->invalid_bitmap), | |
1988 | "pblk: corrupted GC update"); | |
1989 | spin_unlock(&gc_line->lock); | |
9f6cb13b | 1990 | |
a4bd217b JG |
1991 | ret = 0; |
1992 | goto out; | |
1993 | } | |
1994 | ||
9f6cb13b | 1995 | pblk_trans_map_set(pblk, lba, ppa_new); |
a4bd217b JG |
1996 | out: |
1997 | spin_unlock(&pblk->trans_lock); | |
1998 | return ret; | |
1999 | } | |
2000 | ||
9f6cb13b JG |
2001 | void pblk_update_map_dev(struct pblk *pblk, sector_t lba, |
2002 | struct ppa_addr ppa_mapped, struct ppa_addr ppa_cache) | |
a4bd217b | 2003 | { |
9f6cb13b | 2004 | struct ppa_addr ppa_l2p; |
a4bd217b JG |
2005 | |
2006 | #ifdef CONFIG_NVM_DEBUG | |
2007 | /* Callers must ensure that the ppa points to a device address */ | |
9f6cb13b | 2008 | BUG_ON(pblk_addr_in_cache(ppa_mapped)); |
a4bd217b JG |
2009 | #endif |
2010 | /* Invalidate and discard padded entries */ | |
2011 | if (lba == ADDR_EMPTY) { | |
76758390 | 2012 | atomic64_inc(&pblk->pad_wa); |
a4bd217b JG |
2013 | #ifdef CONFIG_NVM_DEBUG |
2014 | atomic_long_inc(&pblk->padded_wb); | |
2015 | #endif | |
9f6cb13b JG |
2016 | if (!pblk_ppa_empty(ppa_mapped)) |
2017 | pblk_map_invalidate(pblk, ppa_mapped); | |
a4bd217b JG |
2018 | return; |
2019 | } | |
2020 | ||
2021 | /* logic error: lba out-of-bounds. Ignore update */ | |
2022 | if (!(lba < pblk->rl.nr_secs)) { | |
2023 | WARN(1, "pblk: corrupted L2P map request\n"); | |
2024 | return; | |
2025 | } | |
2026 | ||
2027 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 2028 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
a4bd217b JG |
2029 | |
2030 | /* Do not update L2P if the cacheline has been updated. In this case, | |
2031 | * the mapped ppa must be invalidated | |
2032 | */ | |
9f6cb13b JG |
2033 | if (!pblk_ppa_comp(ppa_l2p, ppa_cache)) { |
2034 | if (!pblk_ppa_empty(ppa_mapped)) | |
2035 | pblk_map_invalidate(pblk, ppa_mapped); | |
a4bd217b JG |
2036 | goto out; |
2037 | } | |
2038 | ||
2039 | #ifdef CONFIG_NVM_DEBUG | |
9f6cb13b | 2040 | WARN_ON(!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p)); |
a4bd217b JG |
2041 | #endif |
2042 | ||
9f6cb13b | 2043 | pblk_trans_map_set(pblk, lba, ppa_mapped); |
a4bd217b JG |
2044 | out: |
2045 | spin_unlock(&pblk->trans_lock); | |
2046 | } | |
2047 | ||
2048 | void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas, | |
2049 | sector_t blba, int nr_secs) | |
2050 | { | |
2051 | int i; | |
2052 | ||
2053 | spin_lock(&pblk->trans_lock); | |
7bd4d370 JG |
2054 | for (i = 0; i < nr_secs; i++) { |
2055 | struct ppa_addr ppa; | |
2056 | ||
2057 | ppa = ppas[i] = pblk_trans_map_get(pblk, blba + i); | |
2058 | ||
2059 | /* If the L2P entry maps to a line, the reference is valid */ | |
2060 | if (!pblk_ppa_empty(ppa) && !pblk_addr_in_cache(ppa)) { | |
b1bcfda1 | 2061 | int line_id = pblk_ppa_to_line(ppa); |
7bd4d370 JG |
2062 | struct pblk_line *line = &pblk->lines[line_id]; |
2063 | ||
2064 | kref_get(&line->ref); | |
2065 | } | |
2066 | } | |
a4bd217b JG |
2067 | spin_unlock(&pblk->trans_lock); |
2068 | } | |
2069 | ||
2070 | void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas, | |
2071 | u64 *lba_list, int nr_secs) | |
2072 | { | |
d340121e | 2073 | u64 lba; |
a4bd217b JG |
2074 | int i; |
2075 | ||
2076 | spin_lock(&pblk->trans_lock); | |
2077 | for (i = 0; i < nr_secs; i++) { | |
2078 | lba = lba_list[i]; | |
d340121e | 2079 | if (lba != ADDR_EMPTY) { |
a4bd217b JG |
2080 | /* logic error: lba out-of-bounds. Ignore update */ |
2081 | if (!(lba < pblk->rl.nr_secs)) { | |
2082 | WARN(1, "pblk: corrupted L2P map request\n"); | |
2083 | continue; | |
2084 | } | |
2085 | ppas[i] = pblk_trans_map_get(pblk, lba); | |
2086 | } | |
2087 | } | |
2088 | spin_unlock(&pblk->trans_lock); | |
2089 | } |