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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 | ||
35 | line = &pblk->lines[pblk_dev_ppa_to_line(*ppa)]; | |
36 | pos = pblk_dev_ppa_to_pos(&dev->geo, *ppa); | |
37 | ||
38 | pr_err("pblk: failed to mark bb, line:%d, pos:%d\n", | |
39 | line->id, pos); | |
40 | } | |
41 | ||
42 | kfree(ppa); | |
43 | mempool_free(line_ws, pblk->gen_ws_pool); | |
44 | } | |
45 | ||
a4bd217b JG |
46 | static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line, |
47 | struct ppa_addr *ppa) | |
48 | { | |
49 | struct nvm_tgt_dev *dev = pblk->dev; | |
50 | struct nvm_geo *geo = &dev->geo; | |
51 | int pos = pblk_dev_ppa_to_pos(geo, *ppa); | |
52 | ||
53 | pr_debug("pblk: erase failed: line:%d, pos:%d\n", line->id, pos); | |
54 | atomic_long_inc(&pblk->erase_failed); | |
55 | ||
a44f53fa | 56 | atomic_dec(&line->blk_in_line); |
a4bd217b JG |
57 | if (test_and_set_bit(pos, line->blk_bitmap)) |
58 | pr_err("pblk: attempted to erase bb: line:%d, pos:%d\n", | |
59 | line->id, pos); | |
60 | ||
b84ae4a8 JG |
61 | pblk_gen_run_ws(pblk, NULL, ppa, pblk_line_mark_bb, |
62 | GFP_ATOMIC, pblk->bb_wq); | |
a4bd217b JG |
63 | } |
64 | ||
65 | static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd) | |
66 | { | |
67 | struct pblk_line *line; | |
68 | ||
69 | line = &pblk->lines[pblk_dev_ppa_to_line(rqd->ppa_addr)]; | |
70 | atomic_dec(&line->left_seblks); | |
71 | ||
72 | if (rqd->error) { | |
73 | struct ppa_addr *ppa; | |
74 | ||
75 | ppa = kmalloc(sizeof(struct ppa_addr), GFP_ATOMIC); | |
76 | if (!ppa) | |
77 | return; | |
78 | ||
79 | *ppa = rqd->ppa_addr; | |
80 | pblk_mark_bb(pblk, line, ppa); | |
81 | } | |
588726d3 JG |
82 | |
83 | atomic_dec(&pblk->inflight_io); | |
a4bd217b JG |
84 | } |
85 | ||
86 | /* Erase completion assumes that only one block is erased at the time */ | |
87 | static void pblk_end_io_erase(struct nvm_rq *rqd) | |
88 | { | |
89 | struct pblk *pblk = rqd->private; | |
90 | ||
a4bd217b | 91 | __pblk_end_io_erase(pblk, rqd); |
0d880398 | 92 | mempool_free(rqd, pblk->e_rq_pool); |
a4bd217b JG |
93 | } |
94 | ||
0880a9aa JG |
95 | void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, |
96 | u64 paddr) | |
a4bd217b JG |
97 | { |
98 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
99 | struct list_head *move_list = NULL; | |
100 | ||
101 | /* Lines being reclaimed (GC'ed) cannot be invalidated. Before the L2P | |
102 | * table is modified with reclaimed sectors, a check is done to endure | |
103 | * that newer updates are not overwritten. | |
104 | */ | |
105 | spin_lock(&line->lock); | |
d340121e | 106 | WARN_ON(line->state == PBLK_LINESTATE_FREE); |
a4bd217b JG |
107 | |
108 | if (test_and_set_bit(paddr, line->invalid_bitmap)) { | |
109 | WARN_ONCE(1, "pblk: double invalidate\n"); | |
110 | spin_unlock(&line->lock); | |
111 | return; | |
112 | } | |
dd2a4343 | 113 | le32_add_cpu(line->vsc, -1); |
a4bd217b JG |
114 | |
115 | if (line->state == PBLK_LINESTATE_CLOSED) | |
116 | move_list = pblk_line_gc_list(pblk, line); | |
117 | spin_unlock(&line->lock); | |
118 | ||
119 | if (move_list) { | |
120 | spin_lock(&l_mg->gc_lock); | |
121 | spin_lock(&line->lock); | |
122 | /* Prevent moving a line that has just been chosen for GC */ | |
d340121e | 123 | if (line->state == PBLK_LINESTATE_GC) { |
a4bd217b JG |
124 | spin_unlock(&line->lock); |
125 | spin_unlock(&l_mg->gc_lock); | |
126 | return; | |
127 | } | |
128 | spin_unlock(&line->lock); | |
129 | ||
130 | list_move_tail(&line->list, move_list); | |
131 | spin_unlock(&l_mg->gc_lock); | |
132 | } | |
133 | } | |
134 | ||
135 | void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa) | |
136 | { | |
137 | struct pblk_line *line; | |
138 | u64 paddr; | |
139 | int line_id; | |
140 | ||
141 | #ifdef CONFIG_NVM_DEBUG | |
142 | /* Callers must ensure that the ppa points to a device address */ | |
143 | BUG_ON(pblk_addr_in_cache(ppa)); | |
144 | BUG_ON(pblk_ppa_empty(ppa)); | |
145 | #endif | |
146 | ||
147 | line_id = pblk_tgt_ppa_to_line(ppa); | |
148 | line = &pblk->lines[line_id]; | |
149 | paddr = pblk_dev_ppa_to_line_addr(pblk, ppa); | |
150 | ||
151 | __pblk_map_invalidate(pblk, line, paddr); | |
152 | } | |
153 | ||
a4bd217b JG |
154 | static void pblk_invalidate_range(struct pblk *pblk, sector_t slba, |
155 | unsigned int nr_secs) | |
156 | { | |
157 | sector_t lba; | |
158 | ||
159 | spin_lock(&pblk->trans_lock); | |
160 | for (lba = slba; lba < slba + nr_secs; lba++) { | |
161 | struct ppa_addr ppa; | |
162 | ||
163 | ppa = pblk_trans_map_get(pblk, lba); | |
164 | ||
165 | if (!pblk_addr_in_cache(ppa) && !pblk_ppa_empty(ppa)) | |
166 | pblk_map_invalidate(pblk, ppa); | |
167 | ||
168 | pblk_ppa_set_empty(&ppa); | |
169 | pblk_trans_map_set(pblk, lba, ppa); | |
170 | } | |
171 | spin_unlock(&pblk->trans_lock); | |
172 | } | |
173 | ||
67bf26a3 JG |
174 | /* Caller must guarantee that the request is a valid type */ |
175 | struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type) | |
a4bd217b JG |
176 | { |
177 | mempool_t *pool; | |
178 | struct nvm_rq *rqd; | |
179 | int rq_size; | |
180 | ||
67bf26a3 JG |
181 | switch (type) { |
182 | case PBLK_WRITE: | |
183 | case PBLK_WRITE_INT: | |
a4bd217b JG |
184 | pool = pblk->w_rq_pool; |
185 | rq_size = pblk_w_rq_size; | |
67bf26a3 JG |
186 | break; |
187 | case PBLK_READ: | |
0d880398 | 188 | pool = pblk->r_rq_pool; |
084ec9ba | 189 | rq_size = pblk_g_rq_size; |
67bf26a3 JG |
190 | break; |
191 | default: | |
192 | pool = pblk->e_rq_pool; | |
193 | rq_size = pblk_g_rq_size; | |
a4bd217b JG |
194 | } |
195 | ||
196 | rqd = mempool_alloc(pool, GFP_KERNEL); | |
197 | memset(rqd, 0, rq_size); | |
198 | ||
199 | return rqd; | |
200 | } | |
201 | ||
67bf26a3 JG |
202 | /* Typically used on completion path. Cannot guarantee request consistency */ |
203 | void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type) | |
a4bd217b | 204 | { |
67bf26a3 | 205 | struct nvm_tgt_dev *dev = pblk->dev; |
a4bd217b JG |
206 | mempool_t *pool; |
207 | ||
67bf26a3 JG |
208 | switch (type) { |
209 | case PBLK_WRITE: | |
210 | kfree(((struct pblk_c_ctx *)nvm_rq_to_pdu(rqd))->lun_bitmap); | |
211 | case PBLK_WRITE_INT: | |
a4bd217b | 212 | pool = pblk->w_rq_pool; |
67bf26a3 JG |
213 | break; |
214 | case PBLK_READ: | |
0d880398 | 215 | pool = pblk->r_rq_pool; |
67bf26a3 JG |
216 | break; |
217 | case PBLK_ERASE: | |
218 | pool = pblk->e_rq_pool; | |
219 | break; | |
220 | default: | |
221 | pr_err("pblk: trying to free unknown rqd type\n"); | |
222 | return; | |
223 | } | |
a4bd217b | 224 | |
84a9a8fb IK |
225 | if (rqd->meta_list) |
226 | nvm_dev_dma_free(dev->parent, rqd->meta_list, | |
227 | rqd->dma_meta_list); | |
a4bd217b JG |
228 | mempool_free(rqd, pool); |
229 | } | |
230 | ||
231 | void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, | |
232 | int nr_pages) | |
233 | { | |
234 | struct bio_vec bv; | |
235 | int i; | |
236 | ||
237 | WARN_ON(off + nr_pages != bio->bi_vcnt); | |
238 | ||
a4bd217b JG |
239 | for (i = off; i < nr_pages + off; i++) { |
240 | bv = bio->bi_io_vec[i]; | |
bd432417 | 241 | mempool_free(bv.bv_page, pblk->page_bio_pool); |
a4bd217b JG |
242 | } |
243 | } | |
244 | ||
245 | int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, | |
246 | int nr_pages) | |
247 | { | |
248 | struct request_queue *q = pblk->dev->q; | |
249 | struct page *page; | |
250 | int i, ret; | |
251 | ||
252 | for (i = 0; i < nr_pages; i++) { | |
bd432417 | 253 | page = mempool_alloc(pblk->page_bio_pool, flags); |
a4bd217b JG |
254 | |
255 | ret = bio_add_pc_page(q, bio, page, PBLK_EXPOSED_PAGE_SIZE, 0); | |
256 | if (ret != PBLK_EXPOSED_PAGE_SIZE) { | |
257 | pr_err("pblk: could not add page to bio\n"); | |
bd432417 | 258 | mempool_free(page, pblk->page_bio_pool); |
a4bd217b JG |
259 | goto err; |
260 | } | |
261 | } | |
262 | ||
263 | return 0; | |
264 | err: | |
84a9a8fb | 265 | pblk_bio_free_pages(pblk, bio, (bio->bi_vcnt - i), i); |
a4bd217b JG |
266 | return -1; |
267 | } | |
268 | ||
269 | static void pblk_write_kick(struct pblk *pblk) | |
270 | { | |
271 | wake_up_process(pblk->writer_ts); | |
272 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(1000)); | |
273 | } | |
274 | ||
87c1d2d3 | 275 | void pblk_write_timer_fn(struct timer_list *t) |
a4bd217b | 276 | { |
87c1d2d3 | 277 | struct pblk *pblk = from_timer(pblk, t, wtimer); |
a4bd217b JG |
278 | |
279 | /* kick the write thread every tick to flush outstanding data */ | |
280 | pblk_write_kick(pblk); | |
281 | } | |
282 | ||
283 | void pblk_write_should_kick(struct pblk *pblk) | |
284 | { | |
285 | unsigned int secs_avail = pblk_rb_read_count(&pblk->rwb); | |
286 | ||
287 | if (secs_avail >= pblk->min_write_pgs) | |
288 | pblk_write_kick(pblk); | |
289 | } | |
290 | ||
a4bd217b JG |
291 | void pblk_end_io_sync(struct nvm_rq *rqd) |
292 | { | |
293 | struct completion *waiting = rqd->private; | |
294 | ||
295 | complete(waiting); | |
296 | } | |
297 | ||
8bd40020 | 298 | static void pblk_wait_for_meta(struct pblk *pblk) |
a4bd217b | 299 | { |
588726d3 JG |
300 | do { |
301 | if (!atomic_read(&pblk->inflight_io)) | |
302 | break; | |
a4bd217b | 303 | |
588726d3 JG |
304 | schedule(); |
305 | } while (1); | |
306 | } | |
a4bd217b | 307 | |
588726d3 JG |
308 | static void pblk_flush_writer(struct pblk *pblk) |
309 | { | |
310 | pblk_rb_flush(&pblk->rwb); | |
311 | do { | |
ee8d5c1a | 312 | if (!pblk_rb_sync_count(&pblk->rwb)) |
588726d3 | 313 | break; |
a4bd217b | 314 | |
ee8d5c1a | 315 | pblk_write_kick(pblk); |
588726d3 JG |
316 | schedule(); |
317 | } while (1); | |
a4bd217b JG |
318 | } |
319 | ||
320 | struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line) | |
321 | { | |
322 | struct pblk_line_meta *lm = &pblk->lm; | |
323 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
324 | struct list_head *move_list = NULL; | |
dd2a4343 | 325 | int vsc = le32_to_cpu(*line->vsc); |
a4bd217b | 326 | |
476118c9 JG |
327 | lockdep_assert_held(&line->lock); |
328 | ||
dd2a4343 | 329 | if (!vsc) { |
a4bd217b JG |
330 | if (line->gc_group != PBLK_LINEGC_FULL) { |
331 | line->gc_group = PBLK_LINEGC_FULL; | |
332 | move_list = &l_mg->gc_full_list; | |
333 | } | |
b20ba1bc | 334 | } else if (vsc < lm->high_thrs) { |
a4bd217b JG |
335 | if (line->gc_group != PBLK_LINEGC_HIGH) { |
336 | line->gc_group = PBLK_LINEGC_HIGH; | |
337 | move_list = &l_mg->gc_high_list; | |
338 | } | |
b20ba1bc | 339 | } else if (vsc < lm->mid_thrs) { |
a4bd217b JG |
340 | if (line->gc_group != PBLK_LINEGC_MID) { |
341 | line->gc_group = PBLK_LINEGC_MID; | |
342 | move_list = &l_mg->gc_mid_list; | |
343 | } | |
dd2a4343 | 344 | } else if (vsc < line->sec_in_line) { |
a4bd217b JG |
345 | if (line->gc_group != PBLK_LINEGC_LOW) { |
346 | line->gc_group = PBLK_LINEGC_LOW; | |
347 | move_list = &l_mg->gc_low_list; | |
348 | } | |
dd2a4343 | 349 | } else if (vsc == line->sec_in_line) { |
a4bd217b JG |
350 | if (line->gc_group != PBLK_LINEGC_EMPTY) { |
351 | line->gc_group = PBLK_LINEGC_EMPTY; | |
352 | move_list = &l_mg->gc_empty_list; | |
353 | } | |
354 | } else { | |
355 | line->state = PBLK_LINESTATE_CORRUPT; | |
356 | line->gc_group = PBLK_LINEGC_NONE; | |
357 | move_list = &l_mg->corrupt_list; | |
358 | pr_err("pblk: corrupted vsc for line %d, vsc:%d (%d/%d/%d)\n", | |
dd2a4343 | 359 | line->id, vsc, |
a4bd217b JG |
360 | line->sec_in_line, |
361 | lm->high_thrs, lm->mid_thrs); | |
362 | } | |
363 | ||
364 | return move_list; | |
365 | } | |
366 | ||
367 | void pblk_discard(struct pblk *pblk, struct bio *bio) | |
368 | { | |
369 | sector_t slba = pblk_get_lba(bio); | |
370 | sector_t nr_secs = pblk_get_secs(bio); | |
371 | ||
372 | pblk_invalidate_range(pblk, slba, nr_secs); | |
373 | } | |
374 | ||
a4bd217b JG |
375 | void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd) |
376 | { | |
377 | atomic_long_inc(&pblk->write_failed); | |
378 | #ifdef CONFIG_NVM_DEBUG | |
379 | pblk_print_failed_rqd(pblk, rqd, rqd->error); | |
380 | #endif | |
381 | } | |
382 | ||
383 | void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd) | |
384 | { | |
385 | /* Empty page read is not necessarily an error (e.g., L2P recovery) */ | |
386 | if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) { | |
387 | atomic_long_inc(&pblk->read_empty); | |
388 | return; | |
389 | } | |
390 | ||
391 | switch (rqd->error) { | |
392 | case NVM_RSP_WARN_HIGHECC: | |
393 | atomic_long_inc(&pblk->read_high_ecc); | |
394 | break; | |
395 | case NVM_RSP_ERR_FAILECC: | |
396 | case NVM_RSP_ERR_FAILCRC: | |
397 | atomic_long_inc(&pblk->read_failed); | |
398 | break; | |
399 | default: | |
400 | pr_err("pblk: unknown read error:%d\n", rqd->error); | |
401 | } | |
402 | #ifdef CONFIG_NVM_DEBUG | |
403 | pblk_print_failed_rqd(pblk, rqd, rqd->error); | |
404 | #endif | |
405 | } | |
406 | ||
c2e9f5d4 JG |
407 | void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write) |
408 | { | |
409 | pblk->sec_per_write = sec_per_write; | |
410 | } | |
411 | ||
a4bd217b JG |
412 | int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd) |
413 | { | |
414 | struct nvm_tgt_dev *dev = pblk->dev; | |
415 | ||
416 | #ifdef CONFIG_NVM_DEBUG | |
1a94b2d4 | 417 | int ret; |
a4bd217b | 418 | |
1a94b2d4 JG |
419 | ret = pblk_check_io(pblk, rqd); |
420 | if (ret) | |
421 | return ret; | |
422 | #endif | |
a4bd217b | 423 | |
1a94b2d4 | 424 | atomic_inc(&pblk->inflight_io); |
a4bd217b | 425 | |
1a94b2d4 JG |
426 | return nvm_submit_io(dev, rqd); |
427 | } | |
a4bd217b | 428 | |
1a94b2d4 JG |
429 | int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd) |
430 | { | |
431 | struct nvm_tgt_dev *dev = pblk->dev; | |
432 | ||
433 | #ifdef CONFIG_NVM_DEBUG | |
434 | int ret; | |
435 | ||
436 | ret = pblk_check_io(pblk, rqd); | |
437 | if (ret) | |
438 | return ret; | |
a4bd217b | 439 | #endif |
588726d3 JG |
440 | |
441 | atomic_inc(&pblk->inflight_io); | |
442 | ||
1a94b2d4 | 443 | return nvm_submit_io_sync(dev, rqd); |
a4bd217b JG |
444 | } |
445 | ||
55e836d4 JG |
446 | static void pblk_bio_map_addr_endio(struct bio *bio) |
447 | { | |
448 | bio_put(bio); | |
449 | } | |
450 | ||
a4bd217b JG |
451 | struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data, |
452 | unsigned int nr_secs, unsigned int len, | |
de54e703 | 453 | int alloc_type, gfp_t gfp_mask) |
a4bd217b JG |
454 | { |
455 | struct nvm_tgt_dev *dev = pblk->dev; | |
a4bd217b JG |
456 | void *kaddr = data; |
457 | struct page *page; | |
458 | struct bio *bio; | |
459 | int i, ret; | |
460 | ||
de54e703 | 461 | if (alloc_type == PBLK_KMALLOC_META) |
a4bd217b JG |
462 | return bio_map_kern(dev->q, kaddr, len, gfp_mask); |
463 | ||
464 | bio = bio_kmalloc(gfp_mask, nr_secs); | |
465 | if (!bio) | |
466 | return ERR_PTR(-ENOMEM); | |
467 | ||
468 | for (i = 0; i < nr_secs; i++) { | |
469 | page = vmalloc_to_page(kaddr); | |
470 | if (!page) { | |
471 | pr_err("pblk: could not map vmalloc bio\n"); | |
472 | bio_put(bio); | |
473 | bio = ERR_PTR(-ENOMEM); | |
474 | goto out; | |
475 | } | |
476 | ||
477 | ret = bio_add_pc_page(dev->q, bio, page, PAGE_SIZE, 0); | |
478 | if (ret != PAGE_SIZE) { | |
479 | pr_err("pblk: could not add page to bio\n"); | |
480 | bio_put(bio); | |
481 | bio = ERR_PTR(-ENOMEM); | |
482 | goto out; | |
483 | } | |
484 | ||
485 | kaddr += PAGE_SIZE; | |
486 | } | |
55e836d4 JG |
487 | |
488 | bio->bi_end_io = pblk_bio_map_addr_endio; | |
a4bd217b JG |
489 | out: |
490 | return bio; | |
491 | } | |
492 | ||
493 | int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail, | |
494 | unsigned long secs_to_flush) | |
495 | { | |
c2e9f5d4 | 496 | int max = pblk->sec_per_write; |
a4bd217b JG |
497 | int min = pblk->min_write_pgs; |
498 | int secs_to_sync = 0; | |
499 | ||
500 | if (secs_avail >= max) | |
501 | secs_to_sync = max; | |
502 | else if (secs_avail >= min) | |
503 | secs_to_sync = min * (secs_avail / min); | |
504 | else if (secs_to_flush) | |
505 | secs_to_sync = min; | |
506 | ||
507 | return secs_to_sync; | |
508 | } | |
509 | ||
dd2a4343 JG |
510 | void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) |
511 | { | |
512 | u64 addr; | |
513 | int i; | |
514 | ||
e57903fd | 515 | spin_lock(&line->lock); |
dd2a4343 JG |
516 | addr = find_next_zero_bit(line->map_bitmap, |
517 | pblk->lm.sec_per_line, line->cur_sec); | |
518 | line->cur_sec = addr - nr_secs; | |
519 | ||
520 | for (i = 0; i < nr_secs; i++, line->cur_sec--) | |
521 | WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap)); | |
e57903fd | 522 | spin_unlock(&line->lock); |
dd2a4343 JG |
523 | } |
524 | ||
525 | u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) | |
a4bd217b JG |
526 | { |
527 | u64 addr; | |
528 | int i; | |
529 | ||
476118c9 JG |
530 | lockdep_assert_held(&line->lock); |
531 | ||
a4bd217b JG |
532 | /* logic error: ppa out-of-bounds. Prevent generating bad address */ |
533 | if (line->cur_sec + nr_secs > pblk->lm.sec_per_line) { | |
534 | WARN(1, "pblk: page allocation out of bounds\n"); | |
535 | nr_secs = pblk->lm.sec_per_line - line->cur_sec; | |
536 | } | |
537 | ||
538 | line->cur_sec = addr = find_next_zero_bit(line->map_bitmap, | |
539 | pblk->lm.sec_per_line, line->cur_sec); | |
540 | for (i = 0; i < nr_secs; i++, line->cur_sec++) | |
541 | WARN_ON(test_and_set_bit(line->cur_sec, line->map_bitmap)); | |
542 | ||
543 | return addr; | |
544 | } | |
545 | ||
546 | u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) | |
547 | { | |
548 | u64 addr; | |
549 | ||
550 | /* Lock needed in case a write fails and a recovery needs to remap | |
551 | * failed write buffer entries | |
552 | */ | |
553 | spin_lock(&line->lock); | |
554 | addr = __pblk_alloc_page(pblk, line, nr_secs); | |
555 | line->left_msecs -= nr_secs; | |
556 | WARN(line->left_msecs < 0, "pblk: page allocation out of bounds\n"); | |
557 | spin_unlock(&line->lock); | |
558 | ||
559 | return addr; | |
560 | } | |
561 | ||
dd2a4343 JG |
562 | u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line) |
563 | { | |
564 | u64 paddr; | |
565 | ||
566 | spin_lock(&line->lock); | |
567 | paddr = find_next_zero_bit(line->map_bitmap, | |
568 | pblk->lm.sec_per_line, line->cur_sec); | |
569 | spin_unlock(&line->lock); | |
570 | ||
571 | return paddr; | |
572 | } | |
573 | ||
a4bd217b JG |
574 | /* |
575 | * Submit emeta to one LUN in the raid line at the time to avoid a deadlock when | |
576 | * taking the per LUN semaphore. | |
577 | */ | |
578 | static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line, | |
dd2a4343 | 579 | void *emeta_buf, u64 paddr, int dir) |
a4bd217b JG |
580 | { |
581 | struct nvm_tgt_dev *dev = pblk->dev; | |
582 | struct nvm_geo *geo = &dev->geo; | |
de54e703 | 583 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
a4bd217b | 584 | struct pblk_line_meta *lm = &pblk->lm; |
63e3809c | 585 | void *ppa_list, *meta_list; |
a4bd217b JG |
586 | struct bio *bio; |
587 | struct nvm_rq rqd; | |
63e3809c | 588 | dma_addr_t dma_ppa_list, dma_meta_list; |
a4bd217b | 589 | int min = pblk->min_write_pgs; |
dd2a4343 | 590 | int left_ppas = lm->emeta_sec[0]; |
a4bd217b JG |
591 | int id = line->id; |
592 | int rq_ppas, rq_len; | |
593 | int cmd_op, bio_op; | |
a4bd217b JG |
594 | int i, j; |
595 | int ret; | |
a4bd217b | 596 | |
e2cddf20 | 597 | if (dir == PBLK_WRITE) { |
a4bd217b JG |
598 | bio_op = REQ_OP_WRITE; |
599 | cmd_op = NVM_OP_PWRITE; | |
e2cddf20 | 600 | } else if (dir == PBLK_READ) { |
a4bd217b JG |
601 | bio_op = REQ_OP_READ; |
602 | cmd_op = NVM_OP_PREAD; | |
a4bd217b JG |
603 | } else |
604 | return -EINVAL; | |
605 | ||
63e3809c JG |
606 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, |
607 | &dma_meta_list); | |
608 | if (!meta_list) | |
a4bd217b JG |
609 | return -ENOMEM; |
610 | ||
63e3809c JG |
611 | ppa_list = meta_list + pblk_dma_meta_size; |
612 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
613 | ||
a4bd217b JG |
614 | next_rq: |
615 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
616 | ||
617 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
618 | rq_len = rq_ppas * geo->sec_size; | |
619 | ||
de54e703 JG |
620 | bio = pblk_bio_map_addr(pblk, emeta_buf, rq_ppas, rq_len, |
621 | l_mg->emeta_alloc_type, GFP_KERNEL); | |
a4bd217b JG |
622 | if (IS_ERR(bio)) { |
623 | ret = PTR_ERR(bio); | |
624 | goto free_rqd_dma; | |
625 | } | |
626 | ||
627 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
628 | bio_set_op_attrs(bio, bio_op, 0); | |
629 | ||
630 | rqd.bio = bio; | |
63e3809c | 631 | rqd.meta_list = meta_list; |
a4bd217b | 632 | rqd.ppa_list = ppa_list; |
63e3809c | 633 | rqd.dma_meta_list = dma_meta_list; |
a4bd217b | 634 | rqd.dma_ppa_list = dma_ppa_list; |
63e3809c JG |
635 | rqd.opcode = cmd_op; |
636 | rqd.nr_ppas = rq_ppas; | |
a4bd217b | 637 | |
e2cddf20 | 638 | if (dir == PBLK_WRITE) { |
63e3809c JG |
639 | struct pblk_sec_meta *meta_list = rqd.meta_list; |
640 | ||
e2cddf20 | 641 | rqd.flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b JG |
642 | for (i = 0; i < rqd.nr_ppas; ) { |
643 | spin_lock(&line->lock); | |
644 | paddr = __pblk_alloc_page(pblk, line, min); | |
645 | spin_unlock(&line->lock); | |
63e3809c JG |
646 | for (j = 0; j < min; j++, i++, paddr++) { |
647 | meta_list[i].lba = cpu_to_le64(ADDR_EMPTY); | |
a4bd217b JG |
648 | rqd.ppa_list[i] = |
649 | addr_to_gen_ppa(pblk, paddr, id); | |
63e3809c | 650 | } |
a4bd217b JG |
651 | } |
652 | } else { | |
653 | for (i = 0; i < rqd.nr_ppas; ) { | |
654 | struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, id); | |
655 | int pos = pblk_dev_ppa_to_pos(geo, ppa); | |
f9c10152 JG |
656 | int read_type = PBLK_READ_RANDOM; |
657 | ||
658 | if (pblk_io_aligned(pblk, rq_ppas)) | |
659 | read_type = PBLK_READ_SEQUENTIAL; | |
660 | rqd.flags = pblk_set_read_mode(pblk, read_type); | |
a4bd217b JG |
661 | |
662 | while (test_bit(pos, line->blk_bitmap)) { | |
663 | paddr += min; | |
664 | if (pblk_boundary_paddr_checks(pblk, paddr)) { | |
665 | pr_err("pblk: corrupt emeta line:%d\n", | |
666 | line->id); | |
667 | bio_put(bio); | |
668 | ret = -EINTR; | |
669 | goto free_rqd_dma; | |
670 | } | |
671 | ||
672 | ppa = addr_to_gen_ppa(pblk, paddr, id); | |
673 | pos = pblk_dev_ppa_to_pos(geo, ppa); | |
674 | } | |
675 | ||
676 | if (pblk_boundary_paddr_checks(pblk, paddr + min)) { | |
677 | pr_err("pblk: corrupt emeta line:%d\n", | |
678 | line->id); | |
679 | bio_put(bio); | |
680 | ret = -EINTR; | |
681 | goto free_rqd_dma; | |
682 | } | |
683 | ||
684 | for (j = 0; j < min; j++, i++, paddr++) | |
685 | rqd.ppa_list[i] = | |
686 | addr_to_gen_ppa(pblk, paddr, line->id); | |
687 | } | |
688 | } | |
689 | ||
1a94b2d4 | 690 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b JG |
691 | if (ret) { |
692 | pr_err("pblk: emeta I/O submission failed: %d\n", ret); | |
693 | bio_put(bio); | |
694 | goto free_rqd_dma; | |
695 | } | |
696 | ||
588726d3 | 697 | atomic_dec(&pblk->inflight_io); |
a4bd217b | 698 | |
a4bd217b | 699 | if (rqd.error) { |
e2cddf20 | 700 | if (dir == PBLK_WRITE) |
a4bd217b JG |
701 | pblk_log_write_err(pblk, &rqd); |
702 | else | |
703 | pblk_log_read_err(pblk, &rqd); | |
704 | } | |
705 | ||
dd2a4343 | 706 | emeta_buf += rq_len; |
a4bd217b JG |
707 | left_ppas -= rq_ppas; |
708 | if (left_ppas) | |
709 | goto next_rq; | |
710 | free_rqd_dma: | |
63e3809c | 711 | nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list); |
a4bd217b JG |
712 | return ret; |
713 | } | |
714 | ||
715 | u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line) | |
716 | { | |
717 | struct nvm_tgt_dev *dev = pblk->dev; | |
718 | struct nvm_geo *geo = &dev->geo; | |
719 | struct pblk_line_meta *lm = &pblk->lm; | |
720 | int bit; | |
721 | ||
722 | /* This usually only happens on bad lines */ | |
723 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
724 | if (bit >= lm->blk_per_line) | |
725 | return -1; | |
726 | ||
727 | return bit * geo->sec_per_pl; | |
728 | } | |
729 | ||
730 | static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line, | |
731 | u64 paddr, int dir) | |
732 | { | |
733 | struct nvm_tgt_dev *dev = pblk->dev; | |
734 | struct pblk_line_meta *lm = &pblk->lm; | |
735 | struct bio *bio; | |
736 | struct nvm_rq rqd; | |
737 | __le64 *lba_list = NULL; | |
738 | int i, ret; | |
739 | int cmd_op, bio_op; | |
740 | int flags; | |
a4bd217b | 741 | |
e2cddf20 | 742 | if (dir == PBLK_WRITE) { |
a4bd217b JG |
743 | bio_op = REQ_OP_WRITE; |
744 | cmd_op = NVM_OP_PWRITE; | |
e2cddf20 | 745 | flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
dd2a4343 | 746 | lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
e2cddf20 | 747 | } else if (dir == PBLK_READ) { |
a4bd217b JG |
748 | bio_op = REQ_OP_READ; |
749 | cmd_op = NVM_OP_PREAD; | |
f9c10152 | 750 | flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); |
a4bd217b JG |
751 | } else |
752 | return -EINVAL; | |
753 | ||
754 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
755 | ||
63e3809c JG |
756 | rqd.meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, |
757 | &rqd.dma_meta_list); | |
758 | if (!rqd.meta_list) | |
a4bd217b JG |
759 | return -ENOMEM; |
760 | ||
63e3809c JG |
761 | rqd.ppa_list = rqd.meta_list + pblk_dma_meta_size; |
762 | rqd.dma_ppa_list = rqd.dma_meta_list + pblk_dma_meta_size; | |
763 | ||
a4bd217b JG |
764 | bio = bio_map_kern(dev->q, line->smeta, lm->smeta_len, GFP_KERNEL); |
765 | if (IS_ERR(bio)) { | |
766 | ret = PTR_ERR(bio); | |
767 | goto free_ppa_list; | |
768 | } | |
769 | ||
770 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
771 | bio_set_op_attrs(bio, bio_op, 0); | |
772 | ||
773 | rqd.bio = bio; | |
774 | rqd.opcode = cmd_op; | |
775 | rqd.flags = flags; | |
776 | rqd.nr_ppas = lm->smeta_sec; | |
a4bd217b JG |
777 | |
778 | for (i = 0; i < lm->smeta_sec; i++, paddr++) { | |
63e3809c JG |
779 | struct pblk_sec_meta *meta_list = rqd.meta_list; |
780 | ||
a4bd217b | 781 | rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id); |
63e3809c | 782 | |
e2cddf20 | 783 | if (dir == PBLK_WRITE) { |
f417aa0b | 784 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
63e3809c JG |
785 | |
786 | meta_list[i].lba = lba_list[paddr] = addr_empty; | |
787 | } | |
a4bd217b JG |
788 | } |
789 | ||
790 | /* | |
791 | * This I/O is sent by the write thread when a line is replace. Since | |
792 | * the write thread is the only one sending write and erase commands, | |
793 | * there is no need to take the LUN semaphore. | |
794 | */ | |
1a94b2d4 | 795 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b JG |
796 | if (ret) { |
797 | pr_err("pblk: smeta I/O submission failed: %d\n", ret); | |
798 | bio_put(bio); | |
799 | goto free_ppa_list; | |
800 | } | |
801 | ||
588726d3 | 802 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
803 | |
804 | if (rqd.error) { | |
e2cddf20 | 805 | if (dir == PBLK_WRITE) |
a4bd217b JG |
806 | pblk_log_write_err(pblk, &rqd); |
807 | else | |
808 | pblk_log_read_err(pblk, &rqd); | |
809 | } | |
810 | ||
811 | free_ppa_list: | |
63e3809c | 812 | nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list); |
a4bd217b JG |
813 | |
814 | return ret; | |
815 | } | |
816 | ||
817 | int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line) | |
818 | { | |
819 | u64 bpaddr = pblk_line_smeta_start(pblk, line); | |
820 | ||
e2cddf20 | 821 | return pblk_line_submit_smeta_io(pblk, line, bpaddr, PBLK_READ); |
a4bd217b JG |
822 | } |
823 | ||
dd2a4343 JG |
824 | int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line, |
825 | void *emeta_buf) | |
a4bd217b | 826 | { |
dd2a4343 | 827 | return pblk_line_submit_emeta_io(pblk, line, emeta_buf, |
e2cddf20 | 828 | line->emeta_ssec, PBLK_READ); |
a4bd217b JG |
829 | } |
830 | ||
831 | static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
832 | struct ppa_addr ppa) | |
833 | { | |
834 | rqd->opcode = NVM_OP_ERASE; | |
835 | rqd->ppa_addr = ppa; | |
836 | rqd->nr_ppas = 1; | |
e2cddf20 | 837 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_ERASE); |
a4bd217b JG |
838 | rqd->bio = NULL; |
839 | } | |
840 | ||
841 | static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa) | |
842 | { | |
b805bf80 MB |
843 | struct nvm_rq rqd = {NULL}; |
844 | int ret; | |
a4bd217b JG |
845 | |
846 | pblk_setup_e_rq(pblk, &rqd, ppa); | |
847 | ||
a4bd217b JG |
848 | /* The write thread schedules erases so that it minimizes disturbances |
849 | * with writes. Thus, there is no need to take the LUN semaphore. | |
850 | */ | |
1a94b2d4 | 851 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b JG |
852 | rqd.private = pblk; |
853 | __pblk_end_io_erase(pblk, &rqd); | |
854 | ||
588726d3 | 855 | return ret; |
a4bd217b JG |
856 | } |
857 | ||
858 | int pblk_line_erase(struct pblk *pblk, struct pblk_line *line) | |
859 | { | |
860 | struct pblk_line_meta *lm = &pblk->lm; | |
861 | struct ppa_addr ppa; | |
588726d3 | 862 | int ret, bit = -1; |
a4bd217b | 863 | |
a44f53fa JG |
864 | /* Erase only good blocks, one at a time */ |
865 | do { | |
866 | spin_lock(&line->lock); | |
867 | bit = find_next_zero_bit(line->erase_bitmap, lm->blk_per_line, | |
868 | bit + 1); | |
869 | if (bit >= lm->blk_per_line) { | |
870 | spin_unlock(&line->lock); | |
871 | break; | |
872 | } | |
873 | ||
a4bd217b JG |
874 | ppa = pblk->luns[bit].bppa; /* set ch and lun */ |
875 | ppa.g.blk = line->id; | |
876 | ||
a44f53fa | 877 | atomic_dec(&line->left_eblks); |
a4bd217b | 878 | WARN_ON(test_and_set_bit(bit, line->erase_bitmap)); |
a44f53fa | 879 | spin_unlock(&line->lock); |
a4bd217b | 880 | |
588726d3 JG |
881 | ret = pblk_blk_erase_sync(pblk, ppa); |
882 | if (ret) { | |
a4bd217b | 883 | pr_err("pblk: failed to erase line %d\n", line->id); |
588726d3 | 884 | return ret; |
a4bd217b | 885 | } |
a44f53fa | 886 | } while (1); |
a4bd217b JG |
887 | |
888 | return 0; | |
889 | } | |
890 | ||
dd2a4343 JG |
891 | static void pblk_line_setup_metadata(struct pblk_line *line, |
892 | struct pblk_line_mgmt *l_mg, | |
893 | struct pblk_line_meta *lm) | |
894 | { | |
895 | int meta_line; | |
896 | ||
588726d3 JG |
897 | lockdep_assert_held(&l_mg->free_lock); |
898 | ||
dd2a4343 JG |
899 | retry_meta: |
900 | meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
901 | if (meta_line == PBLK_DATA_LINES) { | |
902 | spin_unlock(&l_mg->free_lock); | |
903 | io_schedule(); | |
904 | spin_lock(&l_mg->free_lock); | |
905 | goto retry_meta; | |
906 | } | |
907 | ||
908 | set_bit(meta_line, &l_mg->meta_bitmap); | |
909 | line->meta_line = meta_line; | |
910 | ||
911 | line->smeta = l_mg->sline_meta[meta_line]; | |
912 | line->emeta = l_mg->eline_meta[meta_line]; | |
913 | ||
914 | memset(line->smeta, 0, lm->smeta_len); | |
915 | memset(line->emeta->buf, 0, lm->emeta_len[0]); | |
916 | ||
917 | line->emeta->mem = 0; | |
918 | atomic_set(&line->emeta->sync, 0); | |
919 | } | |
920 | ||
a4bd217b JG |
921 | /* For now lines are always assumed full lines. Thus, smeta former and current |
922 | * lun bitmaps are omitted. | |
923 | */ | |
dd2a4343 | 924 | static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line, |
a4bd217b JG |
925 | struct pblk_line *cur) |
926 | { | |
927 | struct nvm_tgt_dev *dev = pblk->dev; | |
928 | struct nvm_geo *geo = &dev->geo; | |
929 | struct pblk_line_meta *lm = &pblk->lm; | |
930 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
dd2a4343 JG |
931 | struct pblk_emeta *emeta = line->emeta; |
932 | struct line_emeta *emeta_buf = emeta->buf; | |
933 | struct line_smeta *smeta_buf = (struct line_smeta *)line->smeta; | |
a4bd217b JG |
934 | int nr_blk_line; |
935 | ||
936 | /* After erasing the line, new bad blocks might appear and we risk | |
937 | * having an invalid line | |
938 | */ | |
939 | nr_blk_line = lm->blk_per_line - | |
940 | bitmap_weight(line->blk_bitmap, lm->blk_per_line); | |
941 | if (nr_blk_line < lm->min_blk_line) { | |
942 | spin_lock(&l_mg->free_lock); | |
943 | spin_lock(&line->lock); | |
944 | line->state = PBLK_LINESTATE_BAD; | |
945 | spin_unlock(&line->lock); | |
946 | ||
947 | list_add_tail(&line->list, &l_mg->bad_list); | |
948 | spin_unlock(&l_mg->free_lock); | |
949 | ||
950 | pr_debug("pblk: line %d is bad\n", line->id); | |
951 | ||
952 | return 0; | |
953 | } | |
954 | ||
955 | /* Run-time metadata */ | |
dd2a4343 | 956 | line->lun_bitmap = ((void *)(smeta_buf)) + sizeof(struct line_smeta); |
a4bd217b JG |
957 | |
958 | /* Mark LUNs allocated in this line (all for now) */ | |
959 | bitmap_set(line->lun_bitmap, 0, lm->lun_bitmap_len); | |
960 | ||
dd2a4343 JG |
961 | smeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC); |
962 | memcpy(smeta_buf->header.uuid, pblk->instance_uuid, 16); | |
963 | smeta_buf->header.id = cpu_to_le32(line->id); | |
964 | smeta_buf->header.type = cpu_to_le16(line->type); | |
c79819bc | 965 | smeta_buf->header.version = SMETA_VERSION; |
a4bd217b JG |
966 | |
967 | /* Start metadata */ | |
dd2a4343 JG |
968 | smeta_buf->seq_nr = cpu_to_le64(line->seq_nr); |
969 | smeta_buf->window_wr_lun = cpu_to_le32(geo->nr_luns); | |
a4bd217b JG |
970 | |
971 | /* Fill metadata among lines */ | |
972 | if (cur) { | |
973 | memcpy(line->lun_bitmap, cur->lun_bitmap, lm->lun_bitmap_len); | |
dd2a4343 JG |
974 | smeta_buf->prev_id = cpu_to_le32(cur->id); |
975 | cur->emeta->buf->next_id = cpu_to_le32(line->id); | |
a4bd217b | 976 | } else { |
dd2a4343 | 977 | smeta_buf->prev_id = cpu_to_le32(PBLK_LINE_EMPTY); |
a4bd217b JG |
978 | } |
979 | ||
980 | /* All smeta must be set at this point */ | |
dd2a4343 JG |
981 | smeta_buf->header.crc = cpu_to_le32( |
982 | pblk_calc_meta_header_crc(pblk, &smeta_buf->header)); | |
983 | smeta_buf->crc = cpu_to_le32(pblk_calc_smeta_crc(pblk, smeta_buf)); | |
a4bd217b JG |
984 | |
985 | /* End metadata */ | |
dd2a4343 JG |
986 | memcpy(&emeta_buf->header, &smeta_buf->header, |
987 | sizeof(struct line_header)); | |
988 | emeta_buf->seq_nr = cpu_to_le64(line->seq_nr); | |
989 | emeta_buf->nr_lbas = cpu_to_le64(line->sec_in_line); | |
990 | emeta_buf->nr_valid_lbas = cpu_to_le64(0); | |
991 | emeta_buf->next_id = cpu_to_le32(PBLK_LINE_EMPTY); | |
992 | emeta_buf->crc = cpu_to_le32(0); | |
993 | emeta_buf->prev_id = smeta_buf->prev_id; | |
a4bd217b JG |
994 | |
995 | return 1; | |
996 | } | |
997 | ||
998 | /* For now lines are always assumed full lines. Thus, smeta former and current | |
999 | * lun bitmaps are omitted. | |
1000 | */ | |
1001 | static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line, | |
1002 | int init) | |
1003 | { | |
1004 | struct nvm_tgt_dev *dev = pblk->dev; | |
1005 | struct nvm_geo *geo = &dev->geo; | |
1006 | struct pblk_line_meta *lm = &pblk->lm; | |
1007 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1008 | int nr_bb = 0; | |
1009 | u64 off; | |
1010 | int bit = -1; | |
1011 | ||
1012 | line->sec_in_line = lm->sec_per_line; | |
1013 | ||
1014 | /* Capture bad block information on line mapping bitmaps */ | |
1015 | while ((bit = find_next_bit(line->blk_bitmap, lm->blk_per_line, | |
1016 | bit + 1)) < lm->blk_per_line) { | |
1017 | off = bit * geo->sec_per_pl; | |
1018 | bitmap_shift_left(l_mg->bb_aux, l_mg->bb_template, off, | |
1019 | lm->sec_per_line); | |
1020 | bitmap_or(line->map_bitmap, line->map_bitmap, l_mg->bb_aux, | |
1021 | lm->sec_per_line); | |
1022 | line->sec_in_line -= geo->sec_per_blk; | |
1023 | if (bit >= lm->emeta_bb) | |
1024 | nr_bb++; | |
1025 | } | |
1026 | ||
1027 | /* Mark smeta metadata sectors as bad sectors */ | |
1028 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
1029 | off = bit * geo->sec_per_pl; | |
a4bd217b JG |
1030 | bitmap_set(line->map_bitmap, off, lm->smeta_sec); |
1031 | line->sec_in_line -= lm->smeta_sec; | |
1032 | line->smeta_ssec = off; | |
1033 | line->cur_sec = off + lm->smeta_sec; | |
1034 | ||
e2cddf20 | 1035 | if (init && pblk_line_submit_smeta_io(pblk, line, off, PBLK_WRITE)) { |
a4bd217b | 1036 | pr_debug("pblk: line smeta I/O failed. Retry\n"); |
588726d3 | 1037 | return 1; |
a4bd217b JG |
1038 | } |
1039 | ||
1040 | bitmap_copy(line->invalid_bitmap, line->map_bitmap, lm->sec_per_line); | |
1041 | ||
1042 | /* Mark emeta metadata sectors as bad sectors. We need to consider bad | |
1043 | * blocks to make sure that there are enough sectors to store emeta | |
1044 | */ | |
dd2a4343 JG |
1045 | off = lm->sec_per_line - lm->emeta_sec[0]; |
1046 | bitmap_set(line->invalid_bitmap, off, lm->emeta_sec[0]); | |
a4bd217b JG |
1047 | while (nr_bb) { |
1048 | off -= geo->sec_per_pl; | |
1049 | if (!test_bit(off, line->invalid_bitmap)) { | |
1050 | bitmap_set(line->invalid_bitmap, off, geo->sec_per_pl); | |
1051 | nr_bb--; | |
1052 | } | |
1053 | } | |
1054 | ||
dd2a4343 | 1055 | line->sec_in_line -= lm->emeta_sec[0]; |
a4bd217b | 1056 | line->emeta_ssec = off; |
dd2a4343 | 1057 | line->nr_valid_lbas = 0; |
0880a9aa | 1058 | line->left_msecs = line->sec_in_line; |
dd2a4343 | 1059 | *line->vsc = cpu_to_le32(line->sec_in_line); |
a4bd217b JG |
1060 | |
1061 | if (lm->sec_per_line - line->sec_in_line != | |
1062 | bitmap_weight(line->invalid_bitmap, lm->sec_per_line)) { | |
1063 | spin_lock(&line->lock); | |
1064 | line->state = PBLK_LINESTATE_BAD; | |
1065 | spin_unlock(&line->lock); | |
1066 | ||
1067 | list_add_tail(&line->list, &l_mg->bad_list); | |
1068 | pr_err("pblk: unexpected line %d is bad\n", line->id); | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | return 1; | |
1074 | } | |
1075 | ||
1076 | static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line) | |
1077 | { | |
1078 | struct pblk_line_meta *lm = &pblk->lm; | |
a44f53fa | 1079 | int blk_in_line = atomic_read(&line->blk_in_line); |
a4bd217b | 1080 | |
e72ec1d3 | 1081 | line->map_bitmap = kzalloc(lm->sec_bitmap_len, GFP_ATOMIC); |
a4bd217b JG |
1082 | if (!line->map_bitmap) |
1083 | return -ENOMEM; | |
a4bd217b | 1084 | |
e72ec1d3 JG |
1085 | /* will be initialized using bb info from map_bitmap */ |
1086 | line->invalid_bitmap = kmalloc(lm->sec_bitmap_len, GFP_ATOMIC); | |
a4bd217b | 1087 | if (!line->invalid_bitmap) { |
e72ec1d3 | 1088 | kfree(line->map_bitmap); |
a4bd217b JG |
1089 | return -ENOMEM; |
1090 | } | |
1091 | ||
1092 | spin_lock(&line->lock); | |
1093 | if (line->state != PBLK_LINESTATE_FREE) { | |
e72ec1d3 JG |
1094 | kfree(line->map_bitmap); |
1095 | kfree(line->invalid_bitmap); | |
a4bd217b | 1096 | spin_unlock(&line->lock); |
588726d3 JG |
1097 | WARN(1, "pblk: corrupted line %d, state %d\n", |
1098 | line->id, line->state); | |
1099 | return -EAGAIN; | |
a4bd217b | 1100 | } |
588726d3 | 1101 | |
a4bd217b | 1102 | line->state = PBLK_LINESTATE_OPEN; |
a44f53fa JG |
1103 | |
1104 | atomic_set(&line->left_eblks, blk_in_line); | |
1105 | atomic_set(&line->left_seblks, blk_in_line); | |
dd2a4343 JG |
1106 | |
1107 | line->meta_distance = lm->meta_distance; | |
a4bd217b JG |
1108 | spin_unlock(&line->lock); |
1109 | ||
1110 | /* Bad blocks do not need to be erased */ | |
1111 | bitmap_copy(line->erase_bitmap, line->blk_bitmap, lm->blk_per_line); | |
a4bd217b JG |
1112 | |
1113 | kref_init(&line->ref); | |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line) | |
1119 | { | |
1120 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1121 | int ret; | |
1122 | ||
1123 | spin_lock(&l_mg->free_lock); | |
1124 | l_mg->data_line = line; | |
1125 | list_del(&line->list); | |
a4bd217b JG |
1126 | |
1127 | ret = pblk_line_prepare(pblk, line); | |
1128 | if (ret) { | |
1129 | list_add(&line->list, &l_mg->free_list); | |
3dc001f3 | 1130 | spin_unlock(&l_mg->free_lock); |
a4bd217b JG |
1131 | return ret; |
1132 | } | |
3dc001f3 | 1133 | spin_unlock(&l_mg->free_lock); |
a4bd217b JG |
1134 | |
1135 | pblk_rl_free_lines_dec(&pblk->rl, line); | |
1136 | ||
1137 | if (!pblk_line_init_bb(pblk, line, 0)) { | |
1138 | list_add(&line->list, &l_mg->free_list); | |
1139 | return -EINTR; | |
1140 | } | |
1141 | ||
1142 | return 0; | |
1143 | } | |
1144 | ||
1145 | void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line) | |
1146 | { | |
e72ec1d3 | 1147 | kfree(line->map_bitmap); |
a4bd217b JG |
1148 | line->map_bitmap = NULL; |
1149 | line->smeta = NULL; | |
1150 | line->emeta = NULL; | |
1151 | } | |
1152 | ||
1153 | struct pblk_line *pblk_line_get(struct pblk *pblk) | |
1154 | { | |
1155 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1156 | struct pblk_line_meta *lm = &pblk->lm; | |
588726d3 JG |
1157 | struct pblk_line *line; |
1158 | int ret, bit; | |
a4bd217b JG |
1159 | |
1160 | lockdep_assert_held(&l_mg->free_lock); | |
1161 | ||
588726d3 | 1162 | retry: |
a4bd217b JG |
1163 | if (list_empty(&l_mg->free_list)) { |
1164 | pr_err("pblk: no free lines\n"); | |
588726d3 | 1165 | return NULL; |
a4bd217b JG |
1166 | } |
1167 | ||
1168 | line = list_first_entry(&l_mg->free_list, struct pblk_line, list); | |
1169 | list_del(&line->list); | |
1170 | l_mg->nr_free_lines--; | |
1171 | ||
1172 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
1173 | if (unlikely(bit >= lm->blk_per_line)) { | |
1174 | spin_lock(&line->lock); | |
1175 | line->state = PBLK_LINESTATE_BAD; | |
1176 | spin_unlock(&line->lock); | |
1177 | ||
1178 | list_add_tail(&line->list, &l_mg->bad_list); | |
1179 | ||
1180 | pr_debug("pblk: line %d is bad\n", line->id); | |
588726d3 | 1181 | goto retry; |
a4bd217b JG |
1182 | } |
1183 | ||
588726d3 JG |
1184 | ret = pblk_line_prepare(pblk, line); |
1185 | if (ret) { | |
1186 | if (ret == -EAGAIN) { | |
1187 | list_add(&line->list, &l_mg->corrupt_list); | |
1188 | goto retry; | |
1189 | } else { | |
1190 | pr_err("pblk: failed to prepare line %d\n", line->id); | |
1191 | list_add(&line->list, &l_mg->free_list); | |
1192 | l_mg->nr_free_lines++; | |
1193 | return NULL; | |
1194 | } | |
a4bd217b JG |
1195 | } |
1196 | ||
a4bd217b JG |
1197 | return line; |
1198 | } | |
1199 | ||
1200 | static struct pblk_line *pblk_line_retry(struct pblk *pblk, | |
1201 | struct pblk_line *line) | |
1202 | { | |
1203 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1204 | struct pblk_line *retry_line; | |
1205 | ||
588726d3 | 1206 | retry: |
a4bd217b JG |
1207 | spin_lock(&l_mg->free_lock); |
1208 | retry_line = pblk_line_get(pblk); | |
1209 | if (!retry_line) { | |
be388d9f | 1210 | l_mg->data_line = NULL; |
a4bd217b JG |
1211 | spin_unlock(&l_mg->free_lock); |
1212 | return NULL; | |
1213 | } | |
1214 | ||
1215 | retry_line->smeta = line->smeta; | |
1216 | retry_line->emeta = line->emeta; | |
1217 | retry_line->meta_line = line->meta_line; | |
a4bd217b | 1218 | |
be388d9f | 1219 | pblk_line_free(pblk, line); |
3dc001f3 | 1220 | l_mg->data_line = retry_line; |
a4bd217b JG |
1221 | spin_unlock(&l_mg->free_lock); |
1222 | ||
a4bd217b JG |
1223 | pblk_rl_free_lines_dec(&pblk->rl, retry_line); |
1224 | ||
588726d3 JG |
1225 | if (pblk_line_erase(pblk, retry_line)) |
1226 | goto retry; | |
1227 | ||
a4bd217b JG |
1228 | return retry_line; |
1229 | } | |
1230 | ||
588726d3 JG |
1231 | static void pblk_set_space_limit(struct pblk *pblk) |
1232 | { | |
1233 | struct pblk_rl *rl = &pblk->rl; | |
1234 | ||
1235 | atomic_set(&rl->rb_space, 0); | |
1236 | } | |
1237 | ||
a4bd217b JG |
1238 | struct pblk_line *pblk_line_get_first_data(struct pblk *pblk) |
1239 | { | |
1240 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1241 | struct pblk_line *line; | |
a4bd217b JG |
1242 | int is_next = 0; |
1243 | ||
1244 | spin_lock(&l_mg->free_lock); | |
1245 | line = pblk_line_get(pblk); | |
1246 | if (!line) { | |
1247 | spin_unlock(&l_mg->free_lock); | |
1248 | return NULL; | |
1249 | } | |
1250 | ||
1251 | line->seq_nr = l_mg->d_seq_nr++; | |
1252 | line->type = PBLK_LINETYPE_DATA; | |
1253 | l_mg->data_line = line; | |
1254 | ||
dd2a4343 | 1255 | pblk_line_setup_metadata(line, l_mg, &pblk->lm); |
a4bd217b JG |
1256 | |
1257 | /* Allocate next line for preparation */ | |
1258 | l_mg->data_next = pblk_line_get(pblk); | |
588726d3 JG |
1259 | if (!l_mg->data_next) { |
1260 | /* If we cannot get a new line, we need to stop the pipeline. | |
1261 | * Only allow as many writes in as we can store safely and then | |
1262 | * fail gracefully | |
1263 | */ | |
1264 | pblk_set_space_limit(pblk); | |
1265 | ||
1266 | l_mg->data_next = NULL; | |
1267 | } else { | |
a4bd217b JG |
1268 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; |
1269 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
1270 | is_next = 1; | |
1271 | } | |
1272 | spin_unlock(&l_mg->free_lock); | |
1273 | ||
588726d3 JG |
1274 | if (pblk_line_erase(pblk, line)) { |
1275 | line = pblk_line_retry(pblk, line); | |
1276 | if (!line) | |
1277 | return NULL; | |
1278 | } | |
1279 | ||
a4bd217b JG |
1280 | pblk_rl_free_lines_dec(&pblk->rl, line); |
1281 | if (is_next) | |
1282 | pblk_rl_free_lines_dec(&pblk->rl, l_mg->data_next); | |
1283 | ||
a4bd217b | 1284 | retry_setup: |
dd2a4343 | 1285 | if (!pblk_line_init_metadata(pblk, line, NULL)) { |
a4bd217b JG |
1286 | line = pblk_line_retry(pblk, line); |
1287 | if (!line) | |
1288 | return NULL; | |
1289 | ||
1290 | goto retry_setup; | |
1291 | } | |
1292 | ||
1293 | if (!pblk_line_init_bb(pblk, line, 1)) { | |
1294 | line = pblk_line_retry(pblk, line); | |
1295 | if (!line) | |
1296 | return NULL; | |
1297 | ||
1298 | goto retry_setup; | |
1299 | } | |
1300 | ||
1301 | return line; | |
1302 | } | |
1303 | ||
588726d3 JG |
1304 | static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line) |
1305 | { | |
1306 | lockdep_assert_held(&pblk->l_mg.free_lock); | |
1307 | ||
1308 | pblk_set_space_limit(pblk); | |
1309 | pblk->state = PBLK_STATE_STOPPING; | |
1310 | } | |
1311 | ||
8bd40020 JG |
1312 | static void pblk_line_close_meta_sync(struct pblk *pblk) |
1313 | { | |
1314 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1315 | struct pblk_line_meta *lm = &pblk->lm; | |
1316 | struct pblk_line *line, *tline; | |
1317 | LIST_HEAD(list); | |
1318 | ||
1319 | spin_lock(&l_mg->close_lock); | |
1320 | if (list_empty(&l_mg->emeta_list)) { | |
1321 | spin_unlock(&l_mg->close_lock); | |
1322 | return; | |
1323 | } | |
1324 | ||
1325 | list_cut_position(&list, &l_mg->emeta_list, l_mg->emeta_list.prev); | |
1326 | spin_unlock(&l_mg->close_lock); | |
1327 | ||
1328 | list_for_each_entry_safe(line, tline, &list, list) { | |
1329 | struct pblk_emeta *emeta = line->emeta; | |
1330 | ||
1331 | while (emeta->mem < lm->emeta_len[0]) { | |
1332 | int ret; | |
1333 | ||
1334 | ret = pblk_submit_meta_io(pblk, line); | |
1335 | if (ret) { | |
1336 | pr_err("pblk: sync meta line %d failed (%d)\n", | |
1337 | line->id, ret); | |
1338 | return; | |
1339 | } | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | pblk_wait_for_meta(pblk); | |
1344 | flush_workqueue(pblk->close_wq); | |
1345 | } | |
1346 | ||
588726d3 JG |
1347 | void pblk_pipeline_stop(struct pblk *pblk) |
1348 | { | |
1349 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1350 | int ret; | |
1351 | ||
1352 | spin_lock(&l_mg->free_lock); | |
1353 | if (pblk->state == PBLK_STATE_RECOVERING || | |
1354 | pblk->state == PBLK_STATE_STOPPED) { | |
1355 | spin_unlock(&l_mg->free_lock); | |
1356 | return; | |
1357 | } | |
1358 | pblk->state = PBLK_STATE_RECOVERING; | |
1359 | spin_unlock(&l_mg->free_lock); | |
1360 | ||
1361 | pblk_flush_writer(pblk); | |
1362 | pblk_wait_for_meta(pblk); | |
1363 | ||
1364 | ret = pblk_recov_pad(pblk); | |
1365 | if (ret) { | |
1366 | pr_err("pblk: could not close data on teardown(%d)\n", ret); | |
1367 | return; | |
1368 | } | |
1369 | ||
ee8d5c1a | 1370 | flush_workqueue(pblk->bb_wq); |
588726d3 JG |
1371 | pblk_line_close_meta_sync(pblk); |
1372 | ||
1373 | spin_lock(&l_mg->free_lock); | |
1374 | pblk->state = PBLK_STATE_STOPPED; | |
1375 | l_mg->data_line = NULL; | |
1376 | l_mg->data_next = NULL; | |
1377 | spin_unlock(&l_mg->free_lock); | |
1378 | } | |
1379 | ||
21d22871 | 1380 | struct pblk_line *pblk_line_replace_data(struct pblk *pblk) |
a4bd217b | 1381 | { |
a4bd217b | 1382 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
21d22871 | 1383 | struct pblk_line *cur, *new = NULL; |
a4bd217b | 1384 | unsigned int left_seblks; |
a4bd217b JG |
1385 | int is_next = 0; |
1386 | ||
a4bd217b JG |
1387 | new = l_mg->data_next; |
1388 | if (!new) | |
21d22871 | 1389 | goto out; |
a4bd217b | 1390 | |
588726d3 JG |
1391 | spin_lock(&l_mg->free_lock); |
1392 | if (pblk->state != PBLK_STATE_RUNNING) { | |
1393 | l_mg->data_line = NULL; | |
1394 | l_mg->data_next = NULL; | |
1395 | spin_unlock(&l_mg->free_lock); | |
21d22871 | 1396 | goto out; |
588726d3 | 1397 | } |
c667919d JG |
1398 | cur = l_mg->data_line; |
1399 | l_mg->data_line = new; | |
588726d3 JG |
1400 | |
1401 | pblk_line_setup_metadata(new, l_mg, &pblk->lm); | |
1402 | spin_unlock(&l_mg->free_lock); | |
1403 | ||
1404 | retry_erase: | |
a4bd217b JG |
1405 | left_seblks = atomic_read(&new->left_seblks); |
1406 | if (left_seblks) { | |
1407 | /* If line is not fully erased, erase it */ | |
a44f53fa | 1408 | if (atomic_read(&new->left_eblks)) { |
a4bd217b | 1409 | if (pblk_line_erase(pblk, new)) |
21d22871 | 1410 | goto out; |
a4bd217b JG |
1411 | } else { |
1412 | io_schedule(); | |
1413 | } | |
588726d3 | 1414 | goto retry_erase; |
a4bd217b JG |
1415 | } |
1416 | ||
a4bd217b | 1417 | retry_setup: |
dd2a4343 | 1418 | if (!pblk_line_init_metadata(pblk, new, cur)) { |
a4bd217b | 1419 | new = pblk_line_retry(pblk, new); |
f3236cef | 1420 | if (!new) |
21d22871 | 1421 | goto out; |
a4bd217b JG |
1422 | |
1423 | goto retry_setup; | |
1424 | } | |
1425 | ||
1426 | if (!pblk_line_init_bb(pblk, new, 1)) { | |
1427 | new = pblk_line_retry(pblk, new); | |
1428 | if (!new) | |
21d22871 | 1429 | goto out; |
a4bd217b JG |
1430 | |
1431 | goto retry_setup; | |
1432 | } | |
1433 | ||
588726d3 JG |
1434 | /* Allocate next line for preparation */ |
1435 | spin_lock(&l_mg->free_lock); | |
1436 | l_mg->data_next = pblk_line_get(pblk); | |
1437 | if (!l_mg->data_next) { | |
1438 | /* If we cannot get a new line, we need to stop the pipeline. | |
1439 | * Only allow as many writes in as we can store safely and then | |
1440 | * fail gracefully | |
1441 | */ | |
1442 | pblk_stop_writes(pblk, new); | |
1443 | l_mg->data_next = NULL; | |
1444 | } else { | |
1445 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; | |
1446 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
1447 | is_next = 1; | |
1448 | } | |
1449 | spin_unlock(&l_mg->free_lock); | |
1450 | ||
1451 | if (is_next) | |
1452 | pblk_rl_free_lines_dec(&pblk->rl, l_mg->data_next); | |
21d22871 JG |
1453 | |
1454 | out: | |
1455 | return new; | |
a4bd217b JG |
1456 | } |
1457 | ||
1458 | void pblk_line_free(struct pblk *pblk, struct pblk_line *line) | |
1459 | { | |
e72ec1d3 JG |
1460 | kfree(line->map_bitmap); |
1461 | kfree(line->invalid_bitmap); | |
a4bd217b | 1462 | |
dd2a4343 JG |
1463 | *line->vsc = cpu_to_le32(EMPTY_ENTRY); |
1464 | ||
a4bd217b JG |
1465 | line->map_bitmap = NULL; |
1466 | line->invalid_bitmap = NULL; | |
be388d9f JG |
1467 | line->smeta = NULL; |
1468 | line->emeta = NULL; | |
a4bd217b JG |
1469 | } |
1470 | ||
7bd4d370 | 1471 | static void __pblk_line_put(struct pblk *pblk, struct pblk_line *line) |
a4bd217b | 1472 | { |
a4bd217b | 1473 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
d6b992f7 | 1474 | struct pblk_gc *gc = &pblk->gc; |
a4bd217b JG |
1475 | |
1476 | spin_lock(&line->lock); | |
1477 | WARN_ON(line->state != PBLK_LINESTATE_GC); | |
1478 | line->state = PBLK_LINESTATE_FREE; | |
1479 | line->gc_group = PBLK_LINEGC_NONE; | |
1480 | pblk_line_free(pblk, line); | |
1481 | spin_unlock(&line->lock); | |
1482 | ||
d6b992f7 HH |
1483 | atomic_dec(&gc->pipeline_gc); |
1484 | ||
a4bd217b JG |
1485 | spin_lock(&l_mg->free_lock); |
1486 | list_add_tail(&line->list, &l_mg->free_list); | |
1487 | l_mg->nr_free_lines++; | |
1488 | spin_unlock(&l_mg->free_lock); | |
1489 | ||
1490 | pblk_rl_free_lines_inc(&pblk->rl, line); | |
1491 | } | |
1492 | ||
7bd4d370 JG |
1493 | static void pblk_line_put_ws(struct work_struct *work) |
1494 | { | |
1495 | struct pblk_line_ws *line_put_ws = container_of(work, | |
1496 | struct pblk_line_ws, ws); | |
1497 | struct pblk *pblk = line_put_ws->pblk; | |
1498 | struct pblk_line *line = line_put_ws->line; | |
1499 | ||
1500 | __pblk_line_put(pblk, line); | |
1501 | mempool_free(line_put_ws, pblk->gen_ws_pool); | |
1502 | } | |
1503 | ||
1504 | void pblk_line_put(struct kref *ref) | |
1505 | { | |
1506 | struct pblk_line *line = container_of(ref, struct pblk_line, ref); | |
1507 | struct pblk *pblk = line->pblk; | |
1508 | ||
1509 | __pblk_line_put(pblk, line); | |
1510 | } | |
1511 | ||
1512 | void pblk_line_put_wq(struct kref *ref) | |
1513 | { | |
1514 | struct pblk_line *line = container_of(ref, struct pblk_line, ref); | |
1515 | struct pblk *pblk = line->pblk; | |
1516 | struct pblk_line_ws *line_put_ws; | |
1517 | ||
1518 | line_put_ws = mempool_alloc(pblk->gen_ws_pool, GFP_ATOMIC); | |
1519 | if (!line_put_ws) | |
1520 | return; | |
1521 | ||
1522 | line_put_ws->pblk = pblk; | |
1523 | line_put_ws->line = line; | |
1524 | line_put_ws->priv = NULL; | |
1525 | ||
1526 | INIT_WORK(&line_put_ws->ws, pblk_line_put_ws); | |
1527 | queue_work(pblk->r_end_wq, &line_put_ws->ws); | |
1528 | } | |
1529 | ||
a4bd217b JG |
1530 | int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa) |
1531 | { | |
1532 | struct nvm_rq *rqd; | |
1533 | int err; | |
1534 | ||
67bf26a3 | 1535 | rqd = pblk_alloc_rqd(pblk, PBLK_ERASE); |
a4bd217b JG |
1536 | |
1537 | pblk_setup_e_rq(pblk, rqd, ppa); | |
1538 | ||
1539 | rqd->end_io = pblk_end_io_erase; | |
1540 | rqd->private = pblk; | |
1541 | ||
1542 | /* The write thread schedules erases so that it minimizes disturbances | |
1543 | * with writes. Thus, there is no need to take the LUN semaphore. | |
1544 | */ | |
1545 | err = pblk_submit_io(pblk, rqd); | |
1546 | if (err) { | |
1547 | struct nvm_tgt_dev *dev = pblk->dev; | |
1548 | struct nvm_geo *geo = &dev->geo; | |
1549 | ||
1550 | pr_err("pblk: could not async erase line:%d,blk:%d\n", | |
1551 | pblk_dev_ppa_to_line(ppa), | |
1552 | pblk_dev_ppa_to_pos(geo, ppa)); | |
1553 | } | |
1554 | ||
1555 | return err; | |
1556 | } | |
1557 | ||
1558 | struct pblk_line *pblk_line_get_data(struct pblk *pblk) | |
1559 | { | |
1560 | return pblk->l_mg.data_line; | |
1561 | } | |
1562 | ||
d624f371 JG |
1563 | /* For now, always erase next line */ |
1564 | struct pblk_line *pblk_line_get_erase(struct pblk *pblk) | |
a4bd217b JG |
1565 | { |
1566 | return pblk->l_mg.data_next; | |
1567 | } | |
1568 | ||
1569 | int pblk_line_is_full(struct pblk_line *line) | |
1570 | { | |
1571 | return (line->left_msecs == 0); | |
1572 | } | |
1573 | ||
588726d3 JG |
1574 | static void pblk_line_should_sync_meta(struct pblk *pblk) |
1575 | { | |
1576 | if (pblk_rl_is_limit(&pblk->rl)) | |
1577 | pblk_line_close_meta_sync(pblk); | |
1578 | } | |
1579 | ||
a4bd217b JG |
1580 | void pblk_line_close(struct pblk *pblk, struct pblk_line *line) |
1581 | { | |
1582 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1583 | struct list_head *move_list; | |
1584 | ||
a84ebb83 JG |
1585 | #ifdef CONFIG_NVM_DEBUG |
1586 | struct pblk_line_meta *lm = &pblk->lm; | |
1587 | ||
dd2a4343 | 1588 | WARN(!bitmap_full(line->map_bitmap, lm->sec_per_line), |
a4bd217b | 1589 | "pblk: corrupt closed line %d\n", line->id); |
a84ebb83 | 1590 | #endif |
a4bd217b JG |
1591 | |
1592 | spin_lock(&l_mg->free_lock); | |
1593 | WARN_ON(!test_and_clear_bit(line->meta_line, &l_mg->meta_bitmap)); | |
1594 | spin_unlock(&l_mg->free_lock); | |
1595 | ||
1596 | spin_lock(&l_mg->gc_lock); | |
1597 | spin_lock(&line->lock); | |
1598 | WARN_ON(line->state != PBLK_LINESTATE_OPEN); | |
1599 | line->state = PBLK_LINESTATE_CLOSED; | |
1600 | move_list = pblk_line_gc_list(pblk, line); | |
1601 | ||
1602 | list_add_tail(&line->list, move_list); | |
1603 | ||
e72ec1d3 | 1604 | kfree(line->map_bitmap); |
a4bd217b JG |
1605 | line->map_bitmap = NULL; |
1606 | line->smeta = NULL; | |
1607 | line->emeta = NULL; | |
1608 | ||
1609 | spin_unlock(&line->lock); | |
1610 | spin_unlock(&l_mg->gc_lock); | |
1611 | } | |
1612 | ||
dd2a4343 JG |
1613 | void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line) |
1614 | { | |
1615 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1616 | struct pblk_line_meta *lm = &pblk->lm; | |
1617 | struct pblk_emeta *emeta = line->emeta; | |
1618 | struct line_emeta *emeta_buf = emeta->buf; | |
1619 | ||
588726d3 | 1620 | /* No need for exact vsc value; avoid a big line lock and take aprox. */ |
dd2a4343 JG |
1621 | memcpy(emeta_to_vsc(pblk, emeta_buf), l_mg->vsc_list, lm->vsc_list_len); |
1622 | memcpy(emeta_to_bb(emeta_buf), line->blk_bitmap, lm->blk_bitmap_len); | |
1623 | ||
1624 | emeta_buf->nr_valid_lbas = cpu_to_le64(line->nr_valid_lbas); | |
1625 | emeta_buf->crc = cpu_to_le32(pblk_calc_emeta_crc(pblk, emeta_buf)); | |
1626 | ||
1627 | spin_lock(&l_mg->close_lock); | |
1628 | spin_lock(&line->lock); | |
1629 | list_add_tail(&line->list, &l_mg->emeta_list); | |
1630 | spin_unlock(&line->lock); | |
1631 | spin_unlock(&l_mg->close_lock); | |
588726d3 JG |
1632 | |
1633 | pblk_line_should_sync_meta(pblk); | |
dd2a4343 JG |
1634 | } |
1635 | ||
a4bd217b JG |
1636 | void pblk_line_close_ws(struct work_struct *work) |
1637 | { | |
1638 | struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws, | |
1639 | ws); | |
1640 | struct pblk *pblk = line_ws->pblk; | |
1641 | struct pblk_line *line = line_ws->line; | |
1642 | ||
1643 | pblk_line_close(pblk, line); | |
b84ae4a8 | 1644 | mempool_free(line_ws, pblk->gen_ws_pool); |
a4bd217b JG |
1645 | } |
1646 | ||
b84ae4a8 JG |
1647 | void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv, |
1648 | void (*work)(struct work_struct *), gfp_t gfp_mask, | |
ef576494 | 1649 | struct workqueue_struct *wq) |
a4bd217b JG |
1650 | { |
1651 | struct pblk_line_ws *line_ws; | |
1652 | ||
b84ae4a8 | 1653 | line_ws = mempool_alloc(pblk->gen_ws_pool, gfp_mask); |
a4bd217b JG |
1654 | |
1655 | line_ws->pblk = pblk; | |
1656 | line_ws->line = line; | |
1657 | line_ws->priv = priv; | |
1658 | ||
1659 | INIT_WORK(&line_ws->ws, work); | |
ef576494 | 1660 | queue_work(wq, &line_ws->ws); |
a4bd217b JG |
1661 | } |
1662 | ||
3eaa11e2 JG |
1663 | static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, |
1664 | int nr_ppas, int pos) | |
a4bd217b | 1665 | { |
3eaa11e2 | 1666 | struct pblk_lun *rlun = &pblk->luns[pos]; |
a4bd217b JG |
1667 | int ret; |
1668 | ||
1669 | /* | |
1670 | * Only send one inflight I/O per LUN. Since we map at a page | |
1671 | * granurality, all ppas in the I/O will map to the same LUN | |
1672 | */ | |
1673 | #ifdef CONFIG_NVM_DEBUG | |
1674 | int i; | |
1675 | ||
1676 | for (i = 1; i < nr_ppas; i++) | |
1677 | WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun || | |
1678 | ppa_list[0].g.ch != ppa_list[i].g.ch); | |
1679 | #endif | |
a4bd217b | 1680 | |
3eaa11e2 | 1681 | ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000)); |
c5493845 RP |
1682 | if (ret == -ETIME || ret == -EINTR) |
1683 | pr_err("pblk: taking lun semaphore timed out: err %d\n", -ret); | |
a4bd217b JG |
1684 | } |
1685 | ||
3eaa11e2 JG |
1686 | void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas) |
1687 | { | |
1688 | struct nvm_tgt_dev *dev = pblk->dev; | |
1689 | struct nvm_geo *geo = &dev->geo; | |
1690 | int pos = pblk_ppa_to_pos(geo, ppa_list[0]); | |
1691 | ||
1692 | __pblk_down_page(pblk, ppa_list, nr_ppas, pos); | |
1693 | } | |
1694 | ||
1695 | void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, | |
1696 | unsigned long *lun_bitmap) | |
1697 | { | |
1698 | struct nvm_tgt_dev *dev = pblk->dev; | |
1699 | struct nvm_geo *geo = &dev->geo; | |
1700 | int pos = pblk_ppa_to_pos(geo, ppa_list[0]); | |
1701 | ||
1702 | /* If the LUN has been locked for this same request, do no attempt to | |
1703 | * lock it again | |
1704 | */ | |
1705 | if (test_and_set_bit(pos, lun_bitmap)) | |
1706 | return; | |
1707 | ||
1708 | __pblk_down_page(pblk, ppa_list, nr_ppas, pos); | |
1709 | } | |
1710 | ||
1711 | void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas) | |
1712 | { | |
1713 | struct nvm_tgt_dev *dev = pblk->dev; | |
1714 | struct nvm_geo *geo = &dev->geo; | |
1715 | struct pblk_lun *rlun; | |
1716 | int pos = pblk_ppa_to_pos(geo, ppa_list[0]); | |
1717 | ||
1718 | #ifdef CONFIG_NVM_DEBUG | |
1719 | int i; | |
1720 | ||
1721 | for (i = 1; i < nr_ppas; i++) | |
1722 | WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun || | |
1723 | ppa_list[0].g.ch != ppa_list[i].g.ch); | |
1724 | #endif | |
1725 | ||
1726 | rlun = &pblk->luns[pos]; | |
1727 | up(&rlun->wr_sem); | |
1728 | } | |
1729 | ||
a4bd217b JG |
1730 | void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, |
1731 | unsigned long *lun_bitmap) | |
1732 | { | |
1733 | struct nvm_tgt_dev *dev = pblk->dev; | |
1734 | struct nvm_geo *geo = &dev->geo; | |
1735 | struct pblk_lun *rlun; | |
1736 | int nr_luns = geo->nr_luns; | |
1737 | int bit = -1; | |
1738 | ||
1739 | while ((bit = find_next_bit(lun_bitmap, nr_luns, bit + 1)) < nr_luns) { | |
1740 | rlun = &pblk->luns[bit]; | |
1741 | up(&rlun->wr_sem); | |
1742 | } | |
a4bd217b JG |
1743 | } |
1744 | ||
1745 | void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa) | |
1746 | { | |
9f6cb13b | 1747 | struct ppa_addr ppa_l2p; |
a4bd217b JG |
1748 | |
1749 | /* logic error: lba out-of-bounds. Ignore update */ | |
1750 | if (!(lba < pblk->rl.nr_secs)) { | |
1751 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1752 | return; | |
1753 | } | |
1754 | ||
1755 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 1756 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
a4bd217b | 1757 | |
9f6cb13b JG |
1758 | if (!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p)) |
1759 | pblk_map_invalidate(pblk, ppa_l2p); | |
a4bd217b JG |
1760 | |
1761 | pblk_trans_map_set(pblk, lba, ppa); | |
1762 | spin_unlock(&pblk->trans_lock); | |
1763 | } | |
1764 | ||
1765 | void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa) | |
1766 | { | |
d340121e | 1767 | |
a4bd217b JG |
1768 | #ifdef CONFIG_NVM_DEBUG |
1769 | /* Callers must ensure that the ppa points to a cache address */ | |
1770 | BUG_ON(!pblk_addr_in_cache(ppa)); | |
1771 | BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa))); | |
1772 | #endif | |
1773 | ||
1774 | pblk_update_map(pblk, lba, ppa); | |
1775 | } | |
1776 | ||
9f6cb13b | 1777 | int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa_new, |
d340121e | 1778 | struct pblk_line *gc_line, u64 paddr_gc) |
a4bd217b | 1779 | { |
d340121e | 1780 | struct ppa_addr ppa_l2p, ppa_gc; |
a4bd217b JG |
1781 | int ret = 1; |
1782 | ||
1783 | #ifdef CONFIG_NVM_DEBUG | |
1784 | /* Callers must ensure that the ppa points to a cache address */ | |
9f6cb13b JG |
1785 | BUG_ON(!pblk_addr_in_cache(ppa_new)); |
1786 | BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa_new))); | |
a4bd217b JG |
1787 | #endif |
1788 | ||
1789 | /* logic error: lba out-of-bounds. Ignore update */ | |
1790 | if (!(lba < pblk->rl.nr_secs)) { | |
1791 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1792 | return 0; | |
1793 | } | |
1794 | ||
1795 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 1796 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
d340121e | 1797 | ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, gc_line->id); |
a4bd217b | 1798 | |
d340121e JG |
1799 | if (!pblk_ppa_comp(ppa_l2p, ppa_gc)) { |
1800 | spin_lock(&gc_line->lock); | |
1801 | WARN(!test_bit(paddr_gc, gc_line->invalid_bitmap), | |
1802 | "pblk: corrupted GC update"); | |
1803 | spin_unlock(&gc_line->lock); | |
9f6cb13b | 1804 | |
a4bd217b JG |
1805 | ret = 0; |
1806 | goto out; | |
1807 | } | |
1808 | ||
9f6cb13b | 1809 | pblk_trans_map_set(pblk, lba, ppa_new); |
a4bd217b JG |
1810 | out: |
1811 | spin_unlock(&pblk->trans_lock); | |
1812 | return ret; | |
1813 | } | |
1814 | ||
9f6cb13b JG |
1815 | void pblk_update_map_dev(struct pblk *pblk, sector_t lba, |
1816 | struct ppa_addr ppa_mapped, struct ppa_addr ppa_cache) | |
a4bd217b | 1817 | { |
9f6cb13b | 1818 | struct ppa_addr ppa_l2p; |
a4bd217b JG |
1819 | |
1820 | #ifdef CONFIG_NVM_DEBUG | |
1821 | /* Callers must ensure that the ppa points to a device address */ | |
9f6cb13b | 1822 | BUG_ON(pblk_addr_in_cache(ppa_mapped)); |
a4bd217b JG |
1823 | #endif |
1824 | /* Invalidate and discard padded entries */ | |
1825 | if (lba == ADDR_EMPTY) { | |
1826 | #ifdef CONFIG_NVM_DEBUG | |
1827 | atomic_long_inc(&pblk->padded_wb); | |
1828 | #endif | |
9f6cb13b JG |
1829 | if (!pblk_ppa_empty(ppa_mapped)) |
1830 | pblk_map_invalidate(pblk, ppa_mapped); | |
a4bd217b JG |
1831 | return; |
1832 | } | |
1833 | ||
1834 | /* logic error: lba out-of-bounds. Ignore update */ | |
1835 | if (!(lba < pblk->rl.nr_secs)) { | |
1836 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1837 | return; | |
1838 | } | |
1839 | ||
1840 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 1841 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
a4bd217b JG |
1842 | |
1843 | /* Do not update L2P if the cacheline has been updated. In this case, | |
1844 | * the mapped ppa must be invalidated | |
1845 | */ | |
9f6cb13b JG |
1846 | if (!pblk_ppa_comp(ppa_l2p, ppa_cache)) { |
1847 | if (!pblk_ppa_empty(ppa_mapped)) | |
1848 | pblk_map_invalidate(pblk, ppa_mapped); | |
a4bd217b JG |
1849 | goto out; |
1850 | } | |
1851 | ||
1852 | #ifdef CONFIG_NVM_DEBUG | |
9f6cb13b | 1853 | WARN_ON(!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p)); |
a4bd217b JG |
1854 | #endif |
1855 | ||
9f6cb13b | 1856 | pblk_trans_map_set(pblk, lba, ppa_mapped); |
a4bd217b JG |
1857 | out: |
1858 | spin_unlock(&pblk->trans_lock); | |
1859 | } | |
1860 | ||
1861 | void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas, | |
1862 | sector_t blba, int nr_secs) | |
1863 | { | |
1864 | int i; | |
1865 | ||
1866 | spin_lock(&pblk->trans_lock); | |
7bd4d370 JG |
1867 | for (i = 0; i < nr_secs; i++) { |
1868 | struct ppa_addr ppa; | |
1869 | ||
1870 | ppa = ppas[i] = pblk_trans_map_get(pblk, blba + i); | |
1871 | ||
1872 | /* If the L2P entry maps to a line, the reference is valid */ | |
1873 | if (!pblk_ppa_empty(ppa) && !pblk_addr_in_cache(ppa)) { | |
1874 | int line_id = pblk_dev_ppa_to_line(ppa); | |
1875 | struct pblk_line *line = &pblk->lines[line_id]; | |
1876 | ||
1877 | kref_get(&line->ref); | |
1878 | } | |
1879 | } | |
a4bd217b JG |
1880 | spin_unlock(&pblk->trans_lock); |
1881 | } | |
1882 | ||
1883 | void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas, | |
1884 | u64 *lba_list, int nr_secs) | |
1885 | { | |
d340121e | 1886 | u64 lba; |
a4bd217b JG |
1887 | int i; |
1888 | ||
1889 | spin_lock(&pblk->trans_lock); | |
1890 | for (i = 0; i < nr_secs; i++) { | |
1891 | lba = lba_list[i]; | |
d340121e | 1892 | if (lba != ADDR_EMPTY) { |
a4bd217b JG |
1893 | /* logic error: lba out-of-bounds. Ignore update */ |
1894 | if (!(lba < pblk->rl.nr_secs)) { | |
1895 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1896 | continue; | |
1897 | } | |
1898 | ppas[i] = pblk_trans_map_get(pblk, lba); | |
1899 | } | |
1900 | } | |
1901 | spin_unlock(&pblk->trans_lock); | |
1902 | } |