Commit | Line | Data |
---|---|---|
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); | |
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; | |
b1bcfda1 | 51 | int pos = pblk_ppa_to_pos(geo, *ppa); |
a4bd217b JG |
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 | ||
b1bcfda1 | 69 | line = &pblk->lines[pblk_ppa_to_line(rqd->ppa_addr)]; |
a4bd217b JG |
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 | ||
b1bcfda1 | 147 | line_id = pblk_ppa_to_line(ppa); |
a4bd217b JG |
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 | |
67bf26a3 | 225 | nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list); |
a4bd217b JG |
226 | mempool_free(rqd, pool); |
227 | } | |
228 | ||
229 | void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, | |
230 | int nr_pages) | |
231 | { | |
232 | struct bio_vec bv; | |
233 | int i; | |
234 | ||
235 | WARN_ON(off + nr_pages != bio->bi_vcnt); | |
236 | ||
a4bd217b JG |
237 | for (i = off; i < nr_pages + off; i++) { |
238 | bv = bio->bi_io_vec[i]; | |
bd432417 | 239 | mempool_free(bv.bv_page, pblk->page_bio_pool); |
a4bd217b JG |
240 | } |
241 | } | |
242 | ||
243 | int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, | |
244 | int nr_pages) | |
245 | { | |
246 | struct request_queue *q = pblk->dev->q; | |
247 | struct page *page; | |
248 | int i, ret; | |
249 | ||
250 | for (i = 0; i < nr_pages; i++) { | |
bd432417 | 251 | page = mempool_alloc(pblk->page_bio_pool, flags); |
a4bd217b JG |
252 | |
253 | ret = bio_add_pc_page(q, bio, page, PBLK_EXPOSED_PAGE_SIZE, 0); | |
254 | if (ret != PBLK_EXPOSED_PAGE_SIZE) { | |
255 | pr_err("pblk: could not add page to bio\n"); | |
bd432417 | 256 | mempool_free(page, pblk->page_bio_pool); |
a4bd217b JG |
257 | goto err; |
258 | } | |
259 | } | |
260 | ||
261 | return 0; | |
262 | err: | |
263 | pblk_bio_free_pages(pblk, bio, 0, i - 1); | |
264 | return -1; | |
265 | } | |
266 | ||
267 | static void pblk_write_kick(struct pblk *pblk) | |
268 | { | |
269 | wake_up_process(pblk->writer_ts); | |
270 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(1000)); | |
271 | } | |
272 | ||
87c1d2d3 | 273 | void pblk_write_timer_fn(struct timer_list *t) |
a4bd217b | 274 | { |
87c1d2d3 | 275 | struct pblk *pblk = from_timer(pblk, t, wtimer); |
a4bd217b JG |
276 | |
277 | /* kick the write thread every tick to flush outstanding data */ | |
278 | pblk_write_kick(pblk); | |
279 | } | |
280 | ||
281 | void pblk_write_should_kick(struct pblk *pblk) | |
282 | { | |
283 | unsigned int secs_avail = pblk_rb_read_count(&pblk->rwb); | |
284 | ||
285 | if (secs_avail >= pblk->min_write_pgs) | |
286 | pblk_write_kick(pblk); | |
287 | } | |
288 | ||
a4bd217b JG |
289 | void pblk_end_io_sync(struct nvm_rq *rqd) |
290 | { | |
291 | struct completion *waiting = rqd->private; | |
292 | ||
293 | complete(waiting); | |
294 | } | |
295 | ||
8bd40020 | 296 | static void pblk_wait_for_meta(struct pblk *pblk) |
a4bd217b | 297 | { |
588726d3 JG |
298 | do { |
299 | if (!atomic_read(&pblk->inflight_io)) | |
300 | break; | |
a4bd217b | 301 | |
588726d3 JG |
302 | schedule(); |
303 | } while (1); | |
304 | } | |
a4bd217b | 305 | |
588726d3 JG |
306 | static void pblk_flush_writer(struct pblk *pblk) |
307 | { | |
308 | pblk_rb_flush(&pblk->rwb); | |
309 | do { | |
ee8d5c1a | 310 | if (!pblk_rb_sync_count(&pblk->rwb)) |
588726d3 | 311 | break; |
a4bd217b | 312 | |
ee8d5c1a | 313 | pblk_write_kick(pblk); |
588726d3 JG |
314 | schedule(); |
315 | } while (1); | |
a4bd217b JG |
316 | } |
317 | ||
318 | struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line) | |
319 | { | |
320 | struct pblk_line_meta *lm = &pblk->lm; | |
321 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
322 | struct list_head *move_list = NULL; | |
dd2a4343 | 323 | int vsc = le32_to_cpu(*line->vsc); |
a4bd217b | 324 | |
476118c9 JG |
325 | lockdep_assert_held(&line->lock); |
326 | ||
dd2a4343 | 327 | if (!vsc) { |
a4bd217b JG |
328 | if (line->gc_group != PBLK_LINEGC_FULL) { |
329 | line->gc_group = PBLK_LINEGC_FULL; | |
330 | move_list = &l_mg->gc_full_list; | |
331 | } | |
b20ba1bc | 332 | } else if (vsc < lm->high_thrs) { |
a4bd217b JG |
333 | if (line->gc_group != PBLK_LINEGC_HIGH) { |
334 | line->gc_group = PBLK_LINEGC_HIGH; | |
335 | move_list = &l_mg->gc_high_list; | |
336 | } | |
b20ba1bc | 337 | } else if (vsc < lm->mid_thrs) { |
a4bd217b JG |
338 | if (line->gc_group != PBLK_LINEGC_MID) { |
339 | line->gc_group = PBLK_LINEGC_MID; | |
340 | move_list = &l_mg->gc_mid_list; | |
341 | } | |
dd2a4343 | 342 | } else if (vsc < line->sec_in_line) { |
a4bd217b JG |
343 | if (line->gc_group != PBLK_LINEGC_LOW) { |
344 | line->gc_group = PBLK_LINEGC_LOW; | |
345 | move_list = &l_mg->gc_low_list; | |
346 | } | |
dd2a4343 | 347 | } else if (vsc == line->sec_in_line) { |
a4bd217b JG |
348 | if (line->gc_group != PBLK_LINEGC_EMPTY) { |
349 | line->gc_group = PBLK_LINEGC_EMPTY; | |
350 | move_list = &l_mg->gc_empty_list; | |
351 | } | |
352 | } else { | |
353 | line->state = PBLK_LINESTATE_CORRUPT; | |
354 | line->gc_group = PBLK_LINEGC_NONE; | |
355 | move_list = &l_mg->corrupt_list; | |
356 | pr_err("pblk: corrupted vsc for line %d, vsc:%d (%d/%d/%d)\n", | |
dd2a4343 | 357 | line->id, vsc, |
a4bd217b JG |
358 | line->sec_in_line, |
359 | lm->high_thrs, lm->mid_thrs); | |
360 | } | |
361 | ||
362 | return move_list; | |
363 | } | |
364 | ||
365 | void pblk_discard(struct pblk *pblk, struct bio *bio) | |
366 | { | |
367 | sector_t slba = pblk_get_lba(bio); | |
368 | sector_t nr_secs = pblk_get_secs(bio); | |
369 | ||
370 | pblk_invalidate_range(pblk, slba, nr_secs); | |
371 | } | |
372 | ||
a4bd217b JG |
373 | void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd) |
374 | { | |
375 | atomic_long_inc(&pblk->write_failed); | |
376 | #ifdef CONFIG_NVM_DEBUG | |
377 | pblk_print_failed_rqd(pblk, rqd, rqd->error); | |
378 | #endif | |
379 | } | |
380 | ||
381 | void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd) | |
382 | { | |
383 | /* Empty page read is not necessarily an error (e.g., L2P recovery) */ | |
384 | if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) { | |
385 | atomic_long_inc(&pblk->read_empty); | |
386 | return; | |
387 | } | |
388 | ||
389 | switch (rqd->error) { | |
390 | case NVM_RSP_WARN_HIGHECC: | |
391 | atomic_long_inc(&pblk->read_high_ecc); | |
392 | break; | |
393 | case NVM_RSP_ERR_FAILECC: | |
394 | case NVM_RSP_ERR_FAILCRC: | |
395 | atomic_long_inc(&pblk->read_failed); | |
396 | break; | |
397 | default: | |
398 | pr_err("pblk: unknown read error:%d\n", rqd->error); | |
399 | } | |
400 | #ifdef CONFIG_NVM_DEBUG | |
401 | pblk_print_failed_rqd(pblk, rqd, rqd->error); | |
402 | #endif | |
403 | } | |
404 | ||
c2e9f5d4 JG |
405 | void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write) |
406 | { | |
407 | pblk->sec_per_write = sec_per_write; | |
408 | } | |
409 | ||
a4bd217b JG |
410 | int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd) |
411 | { | |
412 | struct nvm_tgt_dev *dev = pblk->dev; | |
413 | ||
414 | #ifdef CONFIG_NVM_DEBUG | |
1a94b2d4 | 415 | int ret; |
a4bd217b | 416 | |
1a94b2d4 JG |
417 | ret = pblk_check_io(pblk, rqd); |
418 | if (ret) | |
419 | return ret; | |
420 | #endif | |
a4bd217b | 421 | |
1a94b2d4 | 422 | atomic_inc(&pblk->inflight_io); |
a4bd217b | 423 | |
1a94b2d4 JG |
424 | return nvm_submit_io(dev, rqd); |
425 | } | |
a4bd217b | 426 | |
1a94b2d4 JG |
427 | int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd) |
428 | { | |
429 | struct nvm_tgt_dev *dev = pblk->dev; | |
430 | ||
431 | #ifdef CONFIG_NVM_DEBUG | |
432 | int ret; | |
433 | ||
434 | ret = pblk_check_io(pblk, rqd); | |
435 | if (ret) | |
436 | return ret; | |
a4bd217b | 437 | #endif |
588726d3 JG |
438 | |
439 | atomic_inc(&pblk->inflight_io); | |
440 | ||
1a94b2d4 | 441 | return nvm_submit_io_sync(dev, rqd); |
a4bd217b JG |
442 | } |
443 | ||
55e836d4 JG |
444 | static void pblk_bio_map_addr_endio(struct bio *bio) |
445 | { | |
446 | bio_put(bio); | |
447 | } | |
448 | ||
a4bd217b JG |
449 | struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data, |
450 | unsigned int nr_secs, unsigned int len, | |
de54e703 | 451 | int alloc_type, gfp_t gfp_mask) |
a4bd217b JG |
452 | { |
453 | struct nvm_tgt_dev *dev = pblk->dev; | |
a4bd217b JG |
454 | void *kaddr = data; |
455 | struct page *page; | |
456 | struct bio *bio; | |
457 | int i, ret; | |
458 | ||
de54e703 | 459 | if (alloc_type == PBLK_KMALLOC_META) |
a4bd217b JG |
460 | return bio_map_kern(dev->q, kaddr, len, gfp_mask); |
461 | ||
462 | bio = bio_kmalloc(gfp_mask, nr_secs); | |
463 | if (!bio) | |
464 | return ERR_PTR(-ENOMEM); | |
465 | ||
466 | for (i = 0; i < nr_secs; i++) { | |
467 | page = vmalloc_to_page(kaddr); | |
468 | if (!page) { | |
469 | pr_err("pblk: could not map vmalloc bio\n"); | |
470 | bio_put(bio); | |
471 | bio = ERR_PTR(-ENOMEM); | |
472 | goto out; | |
473 | } | |
474 | ||
475 | ret = bio_add_pc_page(dev->q, bio, page, PAGE_SIZE, 0); | |
476 | if (ret != PAGE_SIZE) { | |
477 | pr_err("pblk: could not add page to bio\n"); | |
478 | bio_put(bio); | |
479 | bio = ERR_PTR(-ENOMEM); | |
480 | goto out; | |
481 | } | |
482 | ||
483 | kaddr += PAGE_SIZE; | |
484 | } | |
55e836d4 JG |
485 | |
486 | bio->bi_end_io = pblk_bio_map_addr_endio; | |
a4bd217b JG |
487 | out: |
488 | return bio; | |
489 | } | |
490 | ||
491 | int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail, | |
492 | unsigned long secs_to_flush) | |
493 | { | |
c2e9f5d4 | 494 | int max = pblk->sec_per_write; |
a4bd217b JG |
495 | int min = pblk->min_write_pgs; |
496 | int secs_to_sync = 0; | |
497 | ||
498 | if (secs_avail >= max) | |
499 | secs_to_sync = max; | |
500 | else if (secs_avail >= min) | |
501 | secs_to_sync = min * (secs_avail / min); | |
502 | else if (secs_to_flush) | |
503 | secs_to_sync = min; | |
504 | ||
505 | return secs_to_sync; | |
506 | } | |
507 | ||
dd2a4343 JG |
508 | void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) |
509 | { | |
510 | u64 addr; | |
511 | int i; | |
512 | ||
e57903fd | 513 | spin_lock(&line->lock); |
dd2a4343 JG |
514 | addr = find_next_zero_bit(line->map_bitmap, |
515 | pblk->lm.sec_per_line, line->cur_sec); | |
516 | line->cur_sec = addr - nr_secs; | |
517 | ||
518 | for (i = 0; i < nr_secs; i++, line->cur_sec--) | |
519 | WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap)); | |
e57903fd | 520 | spin_unlock(&line->lock); |
dd2a4343 JG |
521 | } |
522 | ||
523 | u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) | |
a4bd217b JG |
524 | { |
525 | u64 addr; | |
526 | int i; | |
527 | ||
476118c9 JG |
528 | lockdep_assert_held(&line->lock); |
529 | ||
a4bd217b JG |
530 | /* logic error: ppa out-of-bounds. Prevent generating bad address */ |
531 | if (line->cur_sec + nr_secs > pblk->lm.sec_per_line) { | |
532 | WARN(1, "pblk: page allocation out of bounds\n"); | |
533 | nr_secs = pblk->lm.sec_per_line - line->cur_sec; | |
534 | } | |
535 | ||
536 | line->cur_sec = addr = find_next_zero_bit(line->map_bitmap, | |
537 | pblk->lm.sec_per_line, line->cur_sec); | |
538 | for (i = 0; i < nr_secs; i++, line->cur_sec++) | |
539 | WARN_ON(test_and_set_bit(line->cur_sec, line->map_bitmap)); | |
540 | ||
541 | return addr; | |
542 | } | |
543 | ||
544 | u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) | |
545 | { | |
546 | u64 addr; | |
547 | ||
548 | /* Lock needed in case a write fails and a recovery needs to remap | |
549 | * failed write buffer entries | |
550 | */ | |
551 | spin_lock(&line->lock); | |
552 | addr = __pblk_alloc_page(pblk, line, nr_secs); | |
553 | line->left_msecs -= nr_secs; | |
554 | WARN(line->left_msecs < 0, "pblk: page allocation out of bounds\n"); | |
555 | spin_unlock(&line->lock); | |
556 | ||
557 | return addr; | |
558 | } | |
559 | ||
dd2a4343 JG |
560 | u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line) |
561 | { | |
562 | u64 paddr; | |
563 | ||
564 | spin_lock(&line->lock); | |
565 | paddr = find_next_zero_bit(line->map_bitmap, | |
566 | pblk->lm.sec_per_line, line->cur_sec); | |
567 | spin_unlock(&line->lock); | |
568 | ||
569 | return paddr; | |
570 | } | |
571 | ||
a4bd217b JG |
572 | /* |
573 | * Submit emeta to one LUN in the raid line at the time to avoid a deadlock when | |
574 | * taking the per LUN semaphore. | |
575 | */ | |
576 | static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line, | |
dd2a4343 | 577 | void *emeta_buf, u64 paddr, int dir) |
a4bd217b JG |
578 | { |
579 | struct nvm_tgt_dev *dev = pblk->dev; | |
580 | struct nvm_geo *geo = &dev->geo; | |
de54e703 | 581 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
a4bd217b | 582 | struct pblk_line_meta *lm = &pblk->lm; |
63e3809c | 583 | void *ppa_list, *meta_list; |
a4bd217b JG |
584 | struct bio *bio; |
585 | struct nvm_rq rqd; | |
63e3809c | 586 | dma_addr_t dma_ppa_list, dma_meta_list; |
a4bd217b | 587 | int min = pblk->min_write_pgs; |
dd2a4343 | 588 | int left_ppas = lm->emeta_sec[0]; |
a4bd217b JG |
589 | int id = line->id; |
590 | int rq_ppas, rq_len; | |
591 | int cmd_op, bio_op; | |
a4bd217b JG |
592 | int i, j; |
593 | int ret; | |
a4bd217b | 594 | |
e2cddf20 | 595 | if (dir == PBLK_WRITE) { |
a4bd217b JG |
596 | bio_op = REQ_OP_WRITE; |
597 | cmd_op = NVM_OP_PWRITE; | |
e2cddf20 | 598 | } else if (dir == PBLK_READ) { |
a4bd217b JG |
599 | bio_op = REQ_OP_READ; |
600 | cmd_op = NVM_OP_PREAD; | |
a4bd217b JG |
601 | } else |
602 | return -EINVAL; | |
603 | ||
63e3809c JG |
604 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, |
605 | &dma_meta_list); | |
606 | if (!meta_list) | |
a4bd217b JG |
607 | return -ENOMEM; |
608 | ||
63e3809c JG |
609 | ppa_list = meta_list + pblk_dma_meta_size; |
610 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size; | |
611 | ||
a4bd217b JG |
612 | next_rq: |
613 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
614 | ||
615 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0); | |
616 | rq_len = rq_ppas * geo->sec_size; | |
617 | ||
de54e703 JG |
618 | bio = pblk_bio_map_addr(pblk, emeta_buf, rq_ppas, rq_len, |
619 | l_mg->emeta_alloc_type, GFP_KERNEL); | |
a4bd217b JG |
620 | if (IS_ERR(bio)) { |
621 | ret = PTR_ERR(bio); | |
622 | goto free_rqd_dma; | |
623 | } | |
624 | ||
625 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
626 | bio_set_op_attrs(bio, bio_op, 0); | |
627 | ||
628 | rqd.bio = bio; | |
63e3809c | 629 | rqd.meta_list = meta_list; |
a4bd217b | 630 | rqd.ppa_list = ppa_list; |
63e3809c | 631 | rqd.dma_meta_list = dma_meta_list; |
a4bd217b | 632 | rqd.dma_ppa_list = dma_ppa_list; |
63e3809c JG |
633 | rqd.opcode = cmd_op; |
634 | rqd.nr_ppas = rq_ppas; | |
a4bd217b | 635 | |
e2cddf20 | 636 | if (dir == PBLK_WRITE) { |
63e3809c JG |
637 | struct pblk_sec_meta *meta_list = rqd.meta_list; |
638 | ||
e2cddf20 | 639 | rqd.flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b JG |
640 | for (i = 0; i < rqd.nr_ppas; ) { |
641 | spin_lock(&line->lock); | |
642 | paddr = __pblk_alloc_page(pblk, line, min); | |
643 | spin_unlock(&line->lock); | |
63e3809c JG |
644 | for (j = 0; j < min; j++, i++, paddr++) { |
645 | meta_list[i].lba = cpu_to_le64(ADDR_EMPTY); | |
a4bd217b JG |
646 | rqd.ppa_list[i] = |
647 | addr_to_gen_ppa(pblk, paddr, id); | |
63e3809c | 648 | } |
a4bd217b JG |
649 | } |
650 | } else { | |
651 | for (i = 0; i < rqd.nr_ppas; ) { | |
652 | struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, id); | |
b1bcfda1 | 653 | int pos = pblk_ppa_to_pos(geo, ppa); |
f9c10152 JG |
654 | int read_type = PBLK_READ_RANDOM; |
655 | ||
656 | if (pblk_io_aligned(pblk, rq_ppas)) | |
657 | read_type = PBLK_READ_SEQUENTIAL; | |
658 | rqd.flags = pblk_set_read_mode(pblk, read_type); | |
a4bd217b JG |
659 | |
660 | while (test_bit(pos, line->blk_bitmap)) { | |
661 | paddr += min; | |
662 | if (pblk_boundary_paddr_checks(pblk, paddr)) { | |
663 | pr_err("pblk: corrupt emeta line:%d\n", | |
664 | line->id); | |
665 | bio_put(bio); | |
666 | ret = -EINTR; | |
667 | goto free_rqd_dma; | |
668 | } | |
669 | ||
670 | ppa = addr_to_gen_ppa(pblk, paddr, id); | |
b1bcfda1 | 671 | pos = pblk_ppa_to_pos(geo, ppa); |
a4bd217b JG |
672 | } |
673 | ||
674 | if (pblk_boundary_paddr_checks(pblk, paddr + min)) { | |
675 | pr_err("pblk: corrupt emeta line:%d\n", | |
676 | line->id); | |
677 | bio_put(bio); | |
678 | ret = -EINTR; | |
679 | goto free_rqd_dma; | |
680 | } | |
681 | ||
682 | for (j = 0; j < min; j++, i++, paddr++) | |
683 | rqd.ppa_list[i] = | |
684 | addr_to_gen_ppa(pblk, paddr, line->id); | |
685 | } | |
686 | } | |
687 | ||
1a94b2d4 | 688 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b JG |
689 | if (ret) { |
690 | pr_err("pblk: emeta I/O submission failed: %d\n", ret); | |
691 | bio_put(bio); | |
692 | goto free_rqd_dma; | |
693 | } | |
694 | ||
588726d3 | 695 | atomic_dec(&pblk->inflight_io); |
a4bd217b | 696 | |
a4bd217b | 697 | if (rqd.error) { |
e2cddf20 | 698 | if (dir == PBLK_WRITE) |
a4bd217b JG |
699 | pblk_log_write_err(pblk, &rqd); |
700 | else | |
701 | pblk_log_read_err(pblk, &rqd); | |
702 | } | |
703 | ||
dd2a4343 | 704 | emeta_buf += rq_len; |
a4bd217b JG |
705 | left_ppas -= rq_ppas; |
706 | if (left_ppas) | |
707 | goto next_rq; | |
708 | free_rqd_dma: | |
63e3809c | 709 | nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list); |
a4bd217b JG |
710 | return ret; |
711 | } | |
712 | ||
713 | u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line) | |
714 | { | |
715 | struct nvm_tgt_dev *dev = pblk->dev; | |
716 | struct nvm_geo *geo = &dev->geo; | |
717 | struct pblk_line_meta *lm = &pblk->lm; | |
718 | int bit; | |
719 | ||
720 | /* This usually only happens on bad lines */ | |
721 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
722 | if (bit >= lm->blk_per_line) | |
723 | return -1; | |
724 | ||
725 | return bit * geo->sec_per_pl; | |
726 | } | |
727 | ||
728 | static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line, | |
729 | u64 paddr, int dir) | |
730 | { | |
731 | struct nvm_tgt_dev *dev = pblk->dev; | |
732 | struct pblk_line_meta *lm = &pblk->lm; | |
733 | struct bio *bio; | |
734 | struct nvm_rq rqd; | |
735 | __le64 *lba_list = NULL; | |
736 | int i, ret; | |
737 | int cmd_op, bio_op; | |
738 | int flags; | |
a4bd217b | 739 | |
e2cddf20 | 740 | if (dir == PBLK_WRITE) { |
a4bd217b JG |
741 | bio_op = REQ_OP_WRITE; |
742 | cmd_op = NVM_OP_PWRITE; | |
e2cddf20 | 743 | flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
dd2a4343 | 744 | lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
8f554597 | 745 | } else if (dir == PBLK_READ_RECOV || dir == PBLK_READ) { |
a4bd217b JG |
746 | bio_op = REQ_OP_READ; |
747 | cmd_op = NVM_OP_PREAD; | |
f9c10152 | 748 | flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); |
a4bd217b JG |
749 | } else |
750 | return -EINVAL; | |
751 | ||
752 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
753 | ||
63e3809c JG |
754 | rqd.meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, |
755 | &rqd.dma_meta_list); | |
756 | if (!rqd.meta_list) | |
a4bd217b JG |
757 | return -ENOMEM; |
758 | ||
63e3809c JG |
759 | rqd.ppa_list = rqd.meta_list + pblk_dma_meta_size; |
760 | rqd.dma_ppa_list = rqd.dma_meta_list + pblk_dma_meta_size; | |
761 | ||
a4bd217b JG |
762 | bio = bio_map_kern(dev->q, line->smeta, lm->smeta_len, GFP_KERNEL); |
763 | if (IS_ERR(bio)) { | |
764 | ret = PTR_ERR(bio); | |
765 | goto free_ppa_list; | |
766 | } | |
767 | ||
768 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
769 | bio_set_op_attrs(bio, bio_op, 0); | |
770 | ||
771 | rqd.bio = bio; | |
772 | rqd.opcode = cmd_op; | |
773 | rqd.flags = flags; | |
774 | rqd.nr_ppas = lm->smeta_sec; | |
a4bd217b JG |
775 | |
776 | for (i = 0; i < lm->smeta_sec; i++, paddr++) { | |
63e3809c JG |
777 | struct pblk_sec_meta *meta_list = rqd.meta_list; |
778 | ||
a4bd217b | 779 | rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id); |
63e3809c | 780 | |
e2cddf20 | 781 | if (dir == PBLK_WRITE) { |
f417aa0b | 782 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
63e3809c JG |
783 | |
784 | meta_list[i].lba = lba_list[paddr] = addr_empty; | |
785 | } | |
a4bd217b JG |
786 | } |
787 | ||
788 | /* | |
789 | * This I/O is sent by the write thread when a line is replace. Since | |
790 | * the write thread is the only one sending write and erase commands, | |
791 | * there is no need to take the LUN semaphore. | |
792 | */ | |
1a94b2d4 | 793 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b JG |
794 | if (ret) { |
795 | pr_err("pblk: smeta I/O submission failed: %d\n", ret); | |
796 | bio_put(bio); | |
797 | goto free_ppa_list; | |
798 | } | |
799 | ||
588726d3 | 800 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
801 | |
802 | if (rqd.error) { | |
e2cddf20 | 803 | if (dir == PBLK_WRITE) |
a4bd217b | 804 | pblk_log_write_err(pblk, &rqd); |
8f554597 | 805 | else if (dir == PBLK_READ) |
a4bd217b JG |
806 | pblk_log_read_err(pblk, &rqd); |
807 | } | |
808 | ||
809 | free_ppa_list: | |
63e3809c | 810 | nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list); |
a4bd217b JG |
811 | |
812 | return ret; | |
813 | } | |
814 | ||
815 | int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line) | |
816 | { | |
817 | u64 bpaddr = pblk_line_smeta_start(pblk, line); | |
818 | ||
8f554597 | 819 | return pblk_line_submit_smeta_io(pblk, line, bpaddr, PBLK_READ_RECOV); |
a4bd217b JG |
820 | } |
821 | ||
dd2a4343 JG |
822 | int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line, |
823 | void *emeta_buf) | |
a4bd217b | 824 | { |
dd2a4343 | 825 | return pblk_line_submit_emeta_io(pblk, line, emeta_buf, |
e2cddf20 | 826 | line->emeta_ssec, PBLK_READ); |
a4bd217b JG |
827 | } |
828 | ||
829 | static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
830 | struct ppa_addr ppa) | |
831 | { | |
832 | rqd->opcode = NVM_OP_ERASE; | |
833 | rqd->ppa_addr = ppa; | |
834 | rqd->nr_ppas = 1; | |
e2cddf20 | 835 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_ERASE); |
a4bd217b JG |
836 | rqd->bio = NULL; |
837 | } | |
838 | ||
839 | static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa) | |
840 | { | |
841 | struct nvm_rq rqd; | |
588726d3 | 842 | int ret = 0; |
a4bd217b JG |
843 | |
844 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
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 | if (ret) { |
853 | struct nvm_tgt_dev *dev = pblk->dev; | |
854 | struct nvm_geo *geo = &dev->geo; | |
855 | ||
856 | pr_err("pblk: could not sync erase line:%d,blk:%d\n", | |
b1bcfda1 JG |
857 | pblk_ppa_to_line(ppa), |
858 | pblk_ppa_to_pos(geo, ppa)); | |
a4bd217b JG |
859 | |
860 | rqd.error = ret; | |
861 | goto out; | |
862 | } | |
863 | ||
a4bd217b JG |
864 | out: |
865 | rqd.private = pblk; | |
866 | __pblk_end_io_erase(pblk, &rqd); | |
867 | ||
588726d3 | 868 | return ret; |
a4bd217b JG |
869 | } |
870 | ||
871 | int pblk_line_erase(struct pblk *pblk, struct pblk_line *line) | |
872 | { | |
873 | struct pblk_line_meta *lm = &pblk->lm; | |
874 | struct ppa_addr ppa; | |
588726d3 | 875 | int ret, bit = -1; |
a4bd217b | 876 | |
a44f53fa JG |
877 | /* Erase only good blocks, one at a time */ |
878 | do { | |
879 | spin_lock(&line->lock); | |
880 | bit = find_next_zero_bit(line->erase_bitmap, lm->blk_per_line, | |
881 | bit + 1); | |
882 | if (bit >= lm->blk_per_line) { | |
883 | spin_unlock(&line->lock); | |
884 | break; | |
885 | } | |
886 | ||
a4bd217b JG |
887 | ppa = pblk->luns[bit].bppa; /* set ch and lun */ |
888 | ppa.g.blk = line->id; | |
889 | ||
a44f53fa | 890 | atomic_dec(&line->left_eblks); |
a4bd217b | 891 | WARN_ON(test_and_set_bit(bit, line->erase_bitmap)); |
a44f53fa | 892 | spin_unlock(&line->lock); |
a4bd217b | 893 | |
588726d3 JG |
894 | ret = pblk_blk_erase_sync(pblk, ppa); |
895 | if (ret) { | |
a4bd217b | 896 | pr_err("pblk: failed to erase line %d\n", line->id); |
588726d3 | 897 | return ret; |
a4bd217b | 898 | } |
a44f53fa | 899 | } while (1); |
a4bd217b JG |
900 | |
901 | return 0; | |
902 | } | |
903 | ||
dd2a4343 JG |
904 | static void pblk_line_setup_metadata(struct pblk_line *line, |
905 | struct pblk_line_mgmt *l_mg, | |
906 | struct pblk_line_meta *lm) | |
907 | { | |
908 | int meta_line; | |
909 | ||
588726d3 JG |
910 | lockdep_assert_held(&l_mg->free_lock); |
911 | ||
dd2a4343 JG |
912 | retry_meta: |
913 | meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
914 | if (meta_line == PBLK_DATA_LINES) { | |
915 | spin_unlock(&l_mg->free_lock); | |
916 | io_schedule(); | |
917 | spin_lock(&l_mg->free_lock); | |
918 | goto retry_meta; | |
919 | } | |
920 | ||
921 | set_bit(meta_line, &l_mg->meta_bitmap); | |
922 | line->meta_line = meta_line; | |
923 | ||
924 | line->smeta = l_mg->sline_meta[meta_line]; | |
925 | line->emeta = l_mg->eline_meta[meta_line]; | |
926 | ||
927 | memset(line->smeta, 0, lm->smeta_len); | |
928 | memset(line->emeta->buf, 0, lm->emeta_len[0]); | |
929 | ||
930 | line->emeta->mem = 0; | |
931 | atomic_set(&line->emeta->sync, 0); | |
932 | } | |
933 | ||
a4bd217b JG |
934 | /* For now lines are always assumed full lines. Thus, smeta former and current |
935 | * lun bitmaps are omitted. | |
936 | */ | |
dd2a4343 | 937 | static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line, |
a4bd217b JG |
938 | struct pblk_line *cur) |
939 | { | |
940 | struct nvm_tgt_dev *dev = pblk->dev; | |
941 | struct nvm_geo *geo = &dev->geo; | |
942 | struct pblk_line_meta *lm = &pblk->lm; | |
943 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
dd2a4343 JG |
944 | struct pblk_emeta *emeta = line->emeta; |
945 | struct line_emeta *emeta_buf = emeta->buf; | |
946 | struct line_smeta *smeta_buf = (struct line_smeta *)line->smeta; | |
a4bd217b JG |
947 | int nr_blk_line; |
948 | ||
949 | /* After erasing the line, new bad blocks might appear and we risk | |
950 | * having an invalid line | |
951 | */ | |
952 | nr_blk_line = lm->blk_per_line - | |
953 | bitmap_weight(line->blk_bitmap, lm->blk_per_line); | |
954 | if (nr_blk_line < lm->min_blk_line) { | |
955 | spin_lock(&l_mg->free_lock); | |
956 | spin_lock(&line->lock); | |
957 | line->state = PBLK_LINESTATE_BAD; | |
958 | spin_unlock(&line->lock); | |
959 | ||
960 | list_add_tail(&line->list, &l_mg->bad_list); | |
961 | spin_unlock(&l_mg->free_lock); | |
962 | ||
963 | pr_debug("pblk: line %d is bad\n", line->id); | |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
968 | /* Run-time metadata */ | |
dd2a4343 | 969 | line->lun_bitmap = ((void *)(smeta_buf)) + sizeof(struct line_smeta); |
a4bd217b JG |
970 | |
971 | /* Mark LUNs allocated in this line (all for now) */ | |
972 | bitmap_set(line->lun_bitmap, 0, lm->lun_bitmap_len); | |
973 | ||
dd2a4343 JG |
974 | smeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC); |
975 | memcpy(smeta_buf->header.uuid, pblk->instance_uuid, 16); | |
976 | smeta_buf->header.id = cpu_to_le32(line->id); | |
977 | smeta_buf->header.type = cpu_to_le16(line->type); | |
c79819bc | 978 | smeta_buf->header.version = SMETA_VERSION; |
a4bd217b JG |
979 | |
980 | /* Start metadata */ | |
dd2a4343 | 981 | smeta_buf->seq_nr = cpu_to_le64(line->seq_nr); |
fae7fae4 | 982 | smeta_buf->window_wr_lun = cpu_to_le32(geo->all_luns); |
a4bd217b JG |
983 | |
984 | /* Fill metadata among lines */ | |
985 | if (cur) { | |
986 | memcpy(line->lun_bitmap, cur->lun_bitmap, lm->lun_bitmap_len); | |
dd2a4343 JG |
987 | smeta_buf->prev_id = cpu_to_le32(cur->id); |
988 | cur->emeta->buf->next_id = cpu_to_le32(line->id); | |
a4bd217b | 989 | } else { |
dd2a4343 | 990 | smeta_buf->prev_id = cpu_to_le32(PBLK_LINE_EMPTY); |
a4bd217b JG |
991 | } |
992 | ||
993 | /* All smeta must be set at this point */ | |
dd2a4343 JG |
994 | smeta_buf->header.crc = cpu_to_le32( |
995 | pblk_calc_meta_header_crc(pblk, &smeta_buf->header)); | |
996 | smeta_buf->crc = cpu_to_le32(pblk_calc_smeta_crc(pblk, smeta_buf)); | |
a4bd217b JG |
997 | |
998 | /* End metadata */ | |
dd2a4343 JG |
999 | memcpy(&emeta_buf->header, &smeta_buf->header, |
1000 | sizeof(struct line_header)); | |
1001 | emeta_buf->seq_nr = cpu_to_le64(line->seq_nr); | |
1002 | emeta_buf->nr_lbas = cpu_to_le64(line->sec_in_line); | |
1003 | emeta_buf->nr_valid_lbas = cpu_to_le64(0); | |
1004 | emeta_buf->next_id = cpu_to_le32(PBLK_LINE_EMPTY); | |
1005 | emeta_buf->crc = cpu_to_le32(0); | |
1006 | emeta_buf->prev_id = smeta_buf->prev_id; | |
a4bd217b JG |
1007 | |
1008 | return 1; | |
1009 | } | |
1010 | ||
1011 | /* For now lines are always assumed full lines. Thus, smeta former and current | |
1012 | * lun bitmaps are omitted. | |
1013 | */ | |
1014 | static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line, | |
1015 | int init) | |
1016 | { | |
1017 | struct nvm_tgt_dev *dev = pblk->dev; | |
1018 | struct nvm_geo *geo = &dev->geo; | |
1019 | struct pblk_line_meta *lm = &pblk->lm; | |
1020 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1021 | int nr_bb = 0; | |
1022 | u64 off; | |
1023 | int bit = -1; | |
1024 | ||
1025 | line->sec_in_line = lm->sec_per_line; | |
1026 | ||
1027 | /* Capture bad block information on line mapping bitmaps */ | |
1028 | while ((bit = find_next_bit(line->blk_bitmap, lm->blk_per_line, | |
1029 | bit + 1)) < lm->blk_per_line) { | |
1030 | off = bit * geo->sec_per_pl; | |
1031 | bitmap_shift_left(l_mg->bb_aux, l_mg->bb_template, off, | |
1032 | lm->sec_per_line); | |
1033 | bitmap_or(line->map_bitmap, line->map_bitmap, l_mg->bb_aux, | |
1034 | lm->sec_per_line); | |
fae7fae4 | 1035 | line->sec_in_line -= geo->sec_per_chk; |
a4bd217b JG |
1036 | if (bit >= lm->emeta_bb) |
1037 | nr_bb++; | |
1038 | } | |
1039 | ||
1040 | /* Mark smeta metadata sectors as bad sectors */ | |
1041 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
1042 | off = bit * geo->sec_per_pl; | |
a4bd217b JG |
1043 | bitmap_set(line->map_bitmap, off, lm->smeta_sec); |
1044 | line->sec_in_line -= lm->smeta_sec; | |
1045 | line->smeta_ssec = off; | |
1046 | line->cur_sec = off + lm->smeta_sec; | |
1047 | ||
e2cddf20 | 1048 | if (init && pblk_line_submit_smeta_io(pblk, line, off, PBLK_WRITE)) { |
a4bd217b | 1049 | pr_debug("pblk: line smeta I/O failed. Retry\n"); |
588726d3 | 1050 | return 1; |
a4bd217b JG |
1051 | } |
1052 | ||
1053 | bitmap_copy(line->invalid_bitmap, line->map_bitmap, lm->sec_per_line); | |
1054 | ||
1055 | /* Mark emeta metadata sectors as bad sectors. We need to consider bad | |
1056 | * blocks to make sure that there are enough sectors to store emeta | |
1057 | */ | |
dd2a4343 JG |
1058 | off = lm->sec_per_line - lm->emeta_sec[0]; |
1059 | bitmap_set(line->invalid_bitmap, off, lm->emeta_sec[0]); | |
a4bd217b JG |
1060 | while (nr_bb) { |
1061 | off -= geo->sec_per_pl; | |
1062 | if (!test_bit(off, line->invalid_bitmap)) { | |
1063 | bitmap_set(line->invalid_bitmap, off, geo->sec_per_pl); | |
1064 | nr_bb--; | |
1065 | } | |
1066 | } | |
1067 | ||
dd2a4343 | 1068 | line->sec_in_line -= lm->emeta_sec[0]; |
a4bd217b | 1069 | line->emeta_ssec = off; |
dd2a4343 | 1070 | line->nr_valid_lbas = 0; |
0880a9aa | 1071 | line->left_msecs = line->sec_in_line; |
dd2a4343 | 1072 | *line->vsc = cpu_to_le32(line->sec_in_line); |
a4bd217b JG |
1073 | |
1074 | if (lm->sec_per_line - line->sec_in_line != | |
1075 | bitmap_weight(line->invalid_bitmap, lm->sec_per_line)) { | |
1076 | spin_lock(&line->lock); | |
1077 | line->state = PBLK_LINESTATE_BAD; | |
1078 | spin_unlock(&line->lock); | |
1079 | ||
1080 | list_add_tail(&line->list, &l_mg->bad_list); | |
1081 | pr_err("pblk: unexpected line %d is bad\n", line->id); | |
1082 | ||
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | return 1; | |
1087 | } | |
1088 | ||
1089 | static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line) | |
1090 | { | |
1091 | struct pblk_line_meta *lm = &pblk->lm; | |
a44f53fa | 1092 | int blk_in_line = atomic_read(&line->blk_in_line); |
a4bd217b | 1093 | |
e72ec1d3 | 1094 | line->map_bitmap = kzalloc(lm->sec_bitmap_len, GFP_ATOMIC); |
a4bd217b JG |
1095 | if (!line->map_bitmap) |
1096 | return -ENOMEM; | |
a4bd217b | 1097 | |
e72ec1d3 JG |
1098 | /* will be initialized using bb info from map_bitmap */ |
1099 | line->invalid_bitmap = kmalloc(lm->sec_bitmap_len, GFP_ATOMIC); | |
a4bd217b | 1100 | if (!line->invalid_bitmap) { |
e72ec1d3 | 1101 | kfree(line->map_bitmap); |
a4bd217b JG |
1102 | return -ENOMEM; |
1103 | } | |
1104 | ||
1105 | spin_lock(&line->lock); | |
1106 | if (line->state != PBLK_LINESTATE_FREE) { | |
e72ec1d3 JG |
1107 | kfree(line->map_bitmap); |
1108 | kfree(line->invalid_bitmap); | |
a4bd217b | 1109 | spin_unlock(&line->lock); |
588726d3 JG |
1110 | WARN(1, "pblk: corrupted line %d, state %d\n", |
1111 | line->id, line->state); | |
1112 | return -EAGAIN; | |
a4bd217b | 1113 | } |
588726d3 | 1114 | |
a4bd217b | 1115 | line->state = PBLK_LINESTATE_OPEN; |
a44f53fa JG |
1116 | |
1117 | atomic_set(&line->left_eblks, blk_in_line); | |
1118 | atomic_set(&line->left_seblks, blk_in_line); | |
dd2a4343 JG |
1119 | |
1120 | line->meta_distance = lm->meta_distance; | |
a4bd217b JG |
1121 | spin_unlock(&line->lock); |
1122 | ||
1123 | /* Bad blocks do not need to be erased */ | |
1124 | bitmap_copy(line->erase_bitmap, line->blk_bitmap, lm->blk_per_line); | |
a4bd217b JG |
1125 | |
1126 | kref_init(&line->ref); | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line) | |
1132 | { | |
1133 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1134 | int ret; | |
1135 | ||
1136 | spin_lock(&l_mg->free_lock); | |
1137 | l_mg->data_line = line; | |
1138 | list_del(&line->list); | |
a4bd217b JG |
1139 | |
1140 | ret = pblk_line_prepare(pblk, line); | |
1141 | if (ret) { | |
1142 | list_add(&line->list, &l_mg->free_list); | |
3dc001f3 | 1143 | spin_unlock(&l_mg->free_lock); |
a4bd217b JG |
1144 | return ret; |
1145 | } | |
3dc001f3 | 1146 | spin_unlock(&l_mg->free_lock); |
a4bd217b | 1147 | |
a7689938 | 1148 | pblk_rl_free_lines_dec(&pblk->rl, line, true); |
a4bd217b JG |
1149 | |
1150 | if (!pblk_line_init_bb(pblk, line, 0)) { | |
1151 | list_add(&line->list, &l_mg->free_list); | |
1152 | return -EINTR; | |
1153 | } | |
1154 | ||
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line) | |
1159 | { | |
e72ec1d3 | 1160 | kfree(line->map_bitmap); |
a4bd217b JG |
1161 | line->map_bitmap = NULL; |
1162 | line->smeta = NULL; | |
1163 | line->emeta = NULL; | |
1164 | } | |
1165 | ||
1166 | struct pblk_line *pblk_line_get(struct pblk *pblk) | |
1167 | { | |
1168 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1169 | struct pblk_line_meta *lm = &pblk->lm; | |
588726d3 JG |
1170 | struct pblk_line *line; |
1171 | int ret, bit; | |
a4bd217b JG |
1172 | |
1173 | lockdep_assert_held(&l_mg->free_lock); | |
1174 | ||
588726d3 | 1175 | retry: |
a4bd217b JG |
1176 | if (list_empty(&l_mg->free_list)) { |
1177 | pr_err("pblk: no free lines\n"); | |
588726d3 | 1178 | return NULL; |
a4bd217b JG |
1179 | } |
1180 | ||
1181 | line = list_first_entry(&l_mg->free_list, struct pblk_line, list); | |
1182 | list_del(&line->list); | |
1183 | l_mg->nr_free_lines--; | |
1184 | ||
1185 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
1186 | if (unlikely(bit >= lm->blk_per_line)) { | |
1187 | spin_lock(&line->lock); | |
1188 | line->state = PBLK_LINESTATE_BAD; | |
1189 | spin_unlock(&line->lock); | |
1190 | ||
1191 | list_add_tail(&line->list, &l_mg->bad_list); | |
1192 | ||
1193 | pr_debug("pblk: line %d is bad\n", line->id); | |
588726d3 | 1194 | goto retry; |
a4bd217b JG |
1195 | } |
1196 | ||
588726d3 JG |
1197 | ret = pblk_line_prepare(pblk, line); |
1198 | if (ret) { | |
1199 | if (ret == -EAGAIN) { | |
1200 | list_add(&line->list, &l_mg->corrupt_list); | |
1201 | goto retry; | |
1202 | } else { | |
1203 | pr_err("pblk: failed to prepare line %d\n", line->id); | |
1204 | list_add(&line->list, &l_mg->free_list); | |
1205 | l_mg->nr_free_lines++; | |
1206 | return NULL; | |
1207 | } | |
a4bd217b JG |
1208 | } |
1209 | ||
a4bd217b JG |
1210 | return line; |
1211 | } | |
1212 | ||
1213 | static struct pblk_line *pblk_line_retry(struct pblk *pblk, | |
1214 | struct pblk_line *line) | |
1215 | { | |
1216 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1217 | struct pblk_line *retry_line; | |
1218 | ||
588726d3 | 1219 | retry: |
a4bd217b JG |
1220 | spin_lock(&l_mg->free_lock); |
1221 | retry_line = pblk_line_get(pblk); | |
1222 | if (!retry_line) { | |
be388d9f | 1223 | l_mg->data_line = NULL; |
a4bd217b JG |
1224 | spin_unlock(&l_mg->free_lock); |
1225 | return NULL; | |
1226 | } | |
1227 | ||
1228 | retry_line->smeta = line->smeta; | |
1229 | retry_line->emeta = line->emeta; | |
1230 | retry_line->meta_line = line->meta_line; | |
a4bd217b | 1231 | |
be388d9f | 1232 | pblk_line_free(pblk, line); |
3dc001f3 | 1233 | l_mg->data_line = retry_line; |
a4bd217b JG |
1234 | spin_unlock(&l_mg->free_lock); |
1235 | ||
a7689938 | 1236 | pblk_rl_free_lines_dec(&pblk->rl, line, false); |
a4bd217b | 1237 | |
588726d3 JG |
1238 | if (pblk_line_erase(pblk, retry_line)) |
1239 | goto retry; | |
1240 | ||
a4bd217b JG |
1241 | return retry_line; |
1242 | } | |
1243 | ||
588726d3 JG |
1244 | static void pblk_set_space_limit(struct pblk *pblk) |
1245 | { | |
1246 | struct pblk_rl *rl = &pblk->rl; | |
1247 | ||
1248 | atomic_set(&rl->rb_space, 0); | |
1249 | } | |
1250 | ||
a4bd217b JG |
1251 | struct pblk_line *pblk_line_get_first_data(struct pblk *pblk) |
1252 | { | |
1253 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1254 | struct pblk_line *line; | |
a4bd217b JG |
1255 | |
1256 | spin_lock(&l_mg->free_lock); | |
1257 | line = pblk_line_get(pblk); | |
1258 | if (!line) { | |
1259 | spin_unlock(&l_mg->free_lock); | |
1260 | return NULL; | |
1261 | } | |
1262 | ||
1263 | line->seq_nr = l_mg->d_seq_nr++; | |
1264 | line->type = PBLK_LINETYPE_DATA; | |
1265 | l_mg->data_line = line; | |
1266 | ||
dd2a4343 | 1267 | pblk_line_setup_metadata(line, l_mg, &pblk->lm); |
a4bd217b JG |
1268 | |
1269 | /* Allocate next line for preparation */ | |
1270 | l_mg->data_next = pblk_line_get(pblk); | |
588726d3 JG |
1271 | if (!l_mg->data_next) { |
1272 | /* If we cannot get a new line, we need to stop the pipeline. | |
1273 | * Only allow as many writes in as we can store safely and then | |
1274 | * fail gracefully | |
1275 | */ | |
1276 | pblk_set_space_limit(pblk); | |
1277 | ||
1278 | l_mg->data_next = NULL; | |
1279 | } else { | |
a4bd217b JG |
1280 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; |
1281 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
a4bd217b JG |
1282 | } |
1283 | spin_unlock(&l_mg->free_lock); | |
1284 | ||
588726d3 JG |
1285 | if (pblk_line_erase(pblk, line)) { |
1286 | line = pblk_line_retry(pblk, line); | |
1287 | if (!line) | |
1288 | return NULL; | |
1289 | } | |
1290 | ||
a4bd217b | 1291 | retry_setup: |
dd2a4343 | 1292 | if (!pblk_line_init_metadata(pblk, line, NULL)) { |
a4bd217b JG |
1293 | line = pblk_line_retry(pblk, line); |
1294 | if (!line) | |
1295 | return NULL; | |
1296 | ||
1297 | goto retry_setup; | |
1298 | } | |
1299 | ||
1300 | if (!pblk_line_init_bb(pblk, line, 1)) { | |
1301 | line = pblk_line_retry(pblk, line); | |
1302 | if (!line) | |
1303 | return NULL; | |
1304 | ||
1305 | goto retry_setup; | |
1306 | } | |
1307 | ||
a7689938 JG |
1308 | pblk_rl_free_lines_dec(&pblk->rl, line, true); |
1309 | ||
a4bd217b JG |
1310 | return line; |
1311 | } | |
1312 | ||
588726d3 JG |
1313 | static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line) |
1314 | { | |
1315 | lockdep_assert_held(&pblk->l_mg.free_lock); | |
1316 | ||
1317 | pblk_set_space_limit(pblk); | |
1318 | pblk->state = PBLK_STATE_STOPPING; | |
1319 | } | |
1320 | ||
8bd40020 JG |
1321 | static void pblk_line_close_meta_sync(struct pblk *pblk) |
1322 | { | |
1323 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1324 | struct pblk_line_meta *lm = &pblk->lm; | |
1325 | struct pblk_line *line, *tline; | |
1326 | LIST_HEAD(list); | |
1327 | ||
1328 | spin_lock(&l_mg->close_lock); | |
1329 | if (list_empty(&l_mg->emeta_list)) { | |
1330 | spin_unlock(&l_mg->close_lock); | |
1331 | return; | |
1332 | } | |
1333 | ||
1334 | list_cut_position(&list, &l_mg->emeta_list, l_mg->emeta_list.prev); | |
1335 | spin_unlock(&l_mg->close_lock); | |
1336 | ||
1337 | list_for_each_entry_safe(line, tline, &list, list) { | |
1338 | struct pblk_emeta *emeta = line->emeta; | |
1339 | ||
1340 | while (emeta->mem < lm->emeta_len[0]) { | |
1341 | int ret; | |
1342 | ||
1343 | ret = pblk_submit_meta_io(pblk, line); | |
1344 | if (ret) { | |
1345 | pr_err("pblk: sync meta line %d failed (%d)\n", | |
1346 | line->id, ret); | |
1347 | return; | |
1348 | } | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | pblk_wait_for_meta(pblk); | |
1353 | flush_workqueue(pblk->close_wq); | |
1354 | } | |
1355 | ||
588726d3 JG |
1356 | void pblk_pipeline_stop(struct pblk *pblk) |
1357 | { | |
1358 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1359 | int ret; | |
1360 | ||
1361 | spin_lock(&l_mg->free_lock); | |
1362 | if (pblk->state == PBLK_STATE_RECOVERING || | |
1363 | pblk->state == PBLK_STATE_STOPPED) { | |
1364 | spin_unlock(&l_mg->free_lock); | |
1365 | return; | |
1366 | } | |
1367 | pblk->state = PBLK_STATE_RECOVERING; | |
1368 | spin_unlock(&l_mg->free_lock); | |
1369 | ||
1370 | pblk_flush_writer(pblk); | |
1371 | pblk_wait_for_meta(pblk); | |
1372 | ||
1373 | ret = pblk_recov_pad(pblk); | |
1374 | if (ret) { | |
1375 | pr_err("pblk: could not close data on teardown(%d)\n", ret); | |
1376 | return; | |
1377 | } | |
1378 | ||
ee8d5c1a | 1379 | flush_workqueue(pblk->bb_wq); |
588726d3 JG |
1380 | pblk_line_close_meta_sync(pblk); |
1381 | ||
1382 | spin_lock(&l_mg->free_lock); | |
1383 | pblk->state = PBLK_STATE_STOPPED; | |
1384 | l_mg->data_line = NULL; | |
1385 | l_mg->data_next = NULL; | |
1386 | spin_unlock(&l_mg->free_lock); | |
1387 | } | |
1388 | ||
21d22871 | 1389 | struct pblk_line *pblk_line_replace_data(struct pblk *pblk) |
a4bd217b | 1390 | { |
a4bd217b | 1391 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
21d22871 | 1392 | struct pblk_line *cur, *new = NULL; |
a4bd217b | 1393 | unsigned int left_seblks; |
a4bd217b JG |
1394 | |
1395 | cur = l_mg->data_line; | |
1396 | new = l_mg->data_next; | |
1397 | if (!new) | |
21d22871 | 1398 | goto out; |
a4bd217b JG |
1399 | l_mg->data_line = new; |
1400 | ||
588726d3 JG |
1401 | spin_lock(&l_mg->free_lock); |
1402 | if (pblk->state != PBLK_STATE_RUNNING) { | |
1403 | l_mg->data_line = NULL; | |
1404 | l_mg->data_next = NULL; | |
1405 | spin_unlock(&l_mg->free_lock); | |
21d22871 | 1406 | goto out; |
588726d3 JG |
1407 | } |
1408 | ||
1409 | pblk_line_setup_metadata(new, l_mg, &pblk->lm); | |
1410 | spin_unlock(&l_mg->free_lock); | |
1411 | ||
1412 | retry_erase: | |
a4bd217b JG |
1413 | left_seblks = atomic_read(&new->left_seblks); |
1414 | if (left_seblks) { | |
1415 | /* If line is not fully erased, erase it */ | |
a44f53fa | 1416 | if (atomic_read(&new->left_eblks)) { |
a4bd217b | 1417 | if (pblk_line_erase(pblk, new)) |
21d22871 | 1418 | goto out; |
a4bd217b JG |
1419 | } else { |
1420 | io_schedule(); | |
1421 | } | |
588726d3 | 1422 | goto retry_erase; |
a4bd217b JG |
1423 | } |
1424 | ||
a4bd217b | 1425 | retry_setup: |
dd2a4343 | 1426 | if (!pblk_line_init_metadata(pblk, new, cur)) { |
a4bd217b | 1427 | new = pblk_line_retry(pblk, new); |
f3236cef | 1428 | if (!new) |
21d22871 | 1429 | goto out; |
a4bd217b JG |
1430 | |
1431 | goto retry_setup; | |
1432 | } | |
1433 | ||
1434 | if (!pblk_line_init_bb(pblk, new, 1)) { | |
1435 | new = pblk_line_retry(pblk, new); | |
1436 | if (!new) | |
21d22871 | 1437 | goto out; |
a4bd217b JG |
1438 | |
1439 | goto retry_setup; | |
1440 | } | |
1441 | ||
a7689938 JG |
1442 | pblk_rl_free_lines_dec(&pblk->rl, new, true); |
1443 | ||
588726d3 JG |
1444 | /* Allocate next line for preparation */ |
1445 | spin_lock(&l_mg->free_lock); | |
1446 | l_mg->data_next = pblk_line_get(pblk); | |
1447 | if (!l_mg->data_next) { | |
1448 | /* If we cannot get a new line, we need to stop the pipeline. | |
1449 | * Only allow as many writes in as we can store safely and then | |
1450 | * fail gracefully | |
1451 | */ | |
1452 | pblk_stop_writes(pblk, new); | |
1453 | l_mg->data_next = NULL; | |
1454 | } else { | |
1455 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; | |
1456 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
588726d3 JG |
1457 | } |
1458 | spin_unlock(&l_mg->free_lock); | |
1459 | ||
21d22871 JG |
1460 | out: |
1461 | return new; | |
a4bd217b JG |
1462 | } |
1463 | ||
1464 | void pblk_line_free(struct pblk *pblk, struct pblk_line *line) | |
1465 | { | |
e72ec1d3 JG |
1466 | kfree(line->map_bitmap); |
1467 | kfree(line->invalid_bitmap); | |
a4bd217b | 1468 | |
dd2a4343 JG |
1469 | *line->vsc = cpu_to_le32(EMPTY_ENTRY); |
1470 | ||
a4bd217b JG |
1471 | line->map_bitmap = NULL; |
1472 | line->invalid_bitmap = NULL; | |
be388d9f JG |
1473 | line->smeta = NULL; |
1474 | line->emeta = NULL; | |
a4bd217b JG |
1475 | } |
1476 | ||
7bd4d370 | 1477 | static void __pblk_line_put(struct pblk *pblk, struct pblk_line *line) |
a4bd217b | 1478 | { |
a4bd217b | 1479 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
d6b992f7 | 1480 | struct pblk_gc *gc = &pblk->gc; |
a4bd217b JG |
1481 | |
1482 | spin_lock(&line->lock); | |
1483 | WARN_ON(line->state != PBLK_LINESTATE_GC); | |
1484 | line->state = PBLK_LINESTATE_FREE; | |
1485 | line->gc_group = PBLK_LINEGC_NONE; | |
1486 | pblk_line_free(pblk, line); | |
1487 | spin_unlock(&line->lock); | |
1488 | ||
d6b992f7 HH |
1489 | atomic_dec(&gc->pipeline_gc); |
1490 | ||
a4bd217b JG |
1491 | spin_lock(&l_mg->free_lock); |
1492 | list_add_tail(&line->list, &l_mg->free_list); | |
1493 | l_mg->nr_free_lines++; | |
1494 | spin_unlock(&l_mg->free_lock); | |
1495 | ||
1496 | pblk_rl_free_lines_inc(&pblk->rl, line); | |
1497 | } | |
1498 | ||
7bd4d370 JG |
1499 | static void pblk_line_put_ws(struct work_struct *work) |
1500 | { | |
1501 | struct pblk_line_ws *line_put_ws = container_of(work, | |
1502 | struct pblk_line_ws, ws); | |
1503 | struct pblk *pblk = line_put_ws->pblk; | |
1504 | struct pblk_line *line = line_put_ws->line; | |
1505 | ||
1506 | __pblk_line_put(pblk, line); | |
1507 | mempool_free(line_put_ws, pblk->gen_ws_pool); | |
1508 | } | |
1509 | ||
1510 | void pblk_line_put(struct kref *ref) | |
1511 | { | |
1512 | struct pblk_line *line = container_of(ref, struct pblk_line, ref); | |
1513 | struct pblk *pblk = line->pblk; | |
1514 | ||
1515 | __pblk_line_put(pblk, line); | |
1516 | } | |
1517 | ||
1518 | void pblk_line_put_wq(struct kref *ref) | |
1519 | { | |
1520 | struct pblk_line *line = container_of(ref, struct pblk_line, ref); | |
1521 | struct pblk *pblk = line->pblk; | |
1522 | struct pblk_line_ws *line_put_ws; | |
1523 | ||
1524 | line_put_ws = mempool_alloc(pblk->gen_ws_pool, GFP_ATOMIC); | |
1525 | if (!line_put_ws) | |
1526 | return; | |
1527 | ||
1528 | line_put_ws->pblk = pblk; | |
1529 | line_put_ws->line = line; | |
1530 | line_put_ws->priv = NULL; | |
1531 | ||
1532 | INIT_WORK(&line_put_ws->ws, pblk_line_put_ws); | |
1533 | queue_work(pblk->r_end_wq, &line_put_ws->ws); | |
1534 | } | |
1535 | ||
a4bd217b JG |
1536 | int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa) |
1537 | { | |
1538 | struct nvm_rq *rqd; | |
1539 | int err; | |
1540 | ||
67bf26a3 | 1541 | rqd = pblk_alloc_rqd(pblk, PBLK_ERASE); |
a4bd217b JG |
1542 | |
1543 | pblk_setup_e_rq(pblk, rqd, ppa); | |
1544 | ||
1545 | rqd->end_io = pblk_end_io_erase; | |
1546 | rqd->private = pblk; | |
1547 | ||
1548 | /* The write thread schedules erases so that it minimizes disturbances | |
1549 | * with writes. Thus, there is no need to take the LUN semaphore. | |
1550 | */ | |
1551 | err = pblk_submit_io(pblk, rqd); | |
1552 | if (err) { | |
1553 | struct nvm_tgt_dev *dev = pblk->dev; | |
1554 | struct nvm_geo *geo = &dev->geo; | |
1555 | ||
1556 | pr_err("pblk: could not async erase line:%d,blk:%d\n", | |
b1bcfda1 JG |
1557 | pblk_ppa_to_line(ppa), |
1558 | pblk_ppa_to_pos(geo, ppa)); | |
a4bd217b JG |
1559 | } |
1560 | ||
1561 | return err; | |
1562 | } | |
1563 | ||
1564 | struct pblk_line *pblk_line_get_data(struct pblk *pblk) | |
1565 | { | |
1566 | return pblk->l_mg.data_line; | |
1567 | } | |
1568 | ||
d624f371 JG |
1569 | /* For now, always erase next line */ |
1570 | struct pblk_line *pblk_line_get_erase(struct pblk *pblk) | |
a4bd217b JG |
1571 | { |
1572 | return pblk->l_mg.data_next; | |
1573 | } | |
1574 | ||
1575 | int pblk_line_is_full(struct pblk_line *line) | |
1576 | { | |
1577 | return (line->left_msecs == 0); | |
1578 | } | |
1579 | ||
588726d3 JG |
1580 | static void pblk_line_should_sync_meta(struct pblk *pblk) |
1581 | { | |
1582 | if (pblk_rl_is_limit(&pblk->rl)) | |
1583 | pblk_line_close_meta_sync(pblk); | |
1584 | } | |
1585 | ||
a4bd217b JG |
1586 | void pblk_line_close(struct pblk *pblk, struct pblk_line *line) |
1587 | { | |
1588 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1589 | struct list_head *move_list; | |
1590 | ||
a84ebb83 JG |
1591 | #ifdef CONFIG_NVM_DEBUG |
1592 | struct pblk_line_meta *lm = &pblk->lm; | |
1593 | ||
dd2a4343 | 1594 | WARN(!bitmap_full(line->map_bitmap, lm->sec_per_line), |
a4bd217b | 1595 | "pblk: corrupt closed line %d\n", line->id); |
a84ebb83 | 1596 | #endif |
a4bd217b JG |
1597 | |
1598 | spin_lock(&l_mg->free_lock); | |
1599 | WARN_ON(!test_and_clear_bit(line->meta_line, &l_mg->meta_bitmap)); | |
1600 | spin_unlock(&l_mg->free_lock); | |
1601 | ||
1602 | spin_lock(&l_mg->gc_lock); | |
1603 | spin_lock(&line->lock); | |
1604 | WARN_ON(line->state != PBLK_LINESTATE_OPEN); | |
1605 | line->state = PBLK_LINESTATE_CLOSED; | |
1606 | move_list = pblk_line_gc_list(pblk, line); | |
1607 | ||
1608 | list_add_tail(&line->list, move_list); | |
1609 | ||
e72ec1d3 | 1610 | kfree(line->map_bitmap); |
a4bd217b JG |
1611 | line->map_bitmap = NULL; |
1612 | line->smeta = NULL; | |
1613 | line->emeta = NULL; | |
1614 | ||
1615 | spin_unlock(&line->lock); | |
1616 | spin_unlock(&l_mg->gc_lock); | |
1617 | } | |
1618 | ||
dd2a4343 JG |
1619 | void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line) |
1620 | { | |
1621 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1622 | struct pblk_line_meta *lm = &pblk->lm; | |
1623 | struct pblk_emeta *emeta = line->emeta; | |
1624 | struct line_emeta *emeta_buf = emeta->buf; | |
1625 | ||
588726d3 | 1626 | /* No need for exact vsc value; avoid a big line lock and take aprox. */ |
dd2a4343 JG |
1627 | memcpy(emeta_to_vsc(pblk, emeta_buf), l_mg->vsc_list, lm->vsc_list_len); |
1628 | memcpy(emeta_to_bb(emeta_buf), line->blk_bitmap, lm->blk_bitmap_len); | |
1629 | ||
1630 | emeta_buf->nr_valid_lbas = cpu_to_le64(line->nr_valid_lbas); | |
1631 | emeta_buf->crc = cpu_to_le32(pblk_calc_emeta_crc(pblk, emeta_buf)); | |
1632 | ||
1633 | spin_lock(&l_mg->close_lock); | |
1634 | spin_lock(&line->lock); | |
1635 | list_add_tail(&line->list, &l_mg->emeta_list); | |
1636 | spin_unlock(&line->lock); | |
1637 | spin_unlock(&l_mg->close_lock); | |
588726d3 JG |
1638 | |
1639 | pblk_line_should_sync_meta(pblk); | |
dd2a4343 JG |
1640 | } |
1641 | ||
a4bd217b JG |
1642 | void pblk_line_close_ws(struct work_struct *work) |
1643 | { | |
1644 | struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws, | |
1645 | ws); | |
1646 | struct pblk *pblk = line_ws->pblk; | |
1647 | struct pblk_line *line = line_ws->line; | |
1648 | ||
1649 | pblk_line_close(pblk, line); | |
b84ae4a8 | 1650 | mempool_free(line_ws, pblk->gen_ws_pool); |
a4bd217b JG |
1651 | } |
1652 | ||
b84ae4a8 JG |
1653 | void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv, |
1654 | void (*work)(struct work_struct *), gfp_t gfp_mask, | |
ef576494 | 1655 | struct workqueue_struct *wq) |
a4bd217b JG |
1656 | { |
1657 | struct pblk_line_ws *line_ws; | |
1658 | ||
b84ae4a8 | 1659 | line_ws = mempool_alloc(pblk->gen_ws_pool, gfp_mask); |
a4bd217b JG |
1660 | |
1661 | line_ws->pblk = pblk; | |
1662 | line_ws->line = line; | |
1663 | line_ws->priv = priv; | |
1664 | ||
1665 | INIT_WORK(&line_ws->ws, work); | |
ef576494 | 1666 | queue_work(wq, &line_ws->ws); |
a4bd217b JG |
1667 | } |
1668 | ||
3eaa11e2 JG |
1669 | static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, |
1670 | int nr_ppas, int pos) | |
a4bd217b | 1671 | { |
3eaa11e2 | 1672 | struct pblk_lun *rlun = &pblk->luns[pos]; |
a4bd217b JG |
1673 | int ret; |
1674 | ||
1675 | /* | |
1676 | * Only send one inflight I/O per LUN. Since we map at a page | |
1677 | * granurality, all ppas in the I/O will map to the same LUN | |
1678 | */ | |
1679 | #ifdef CONFIG_NVM_DEBUG | |
1680 | int i; | |
1681 | ||
1682 | for (i = 1; i < nr_ppas; i++) | |
1683 | WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun || | |
1684 | ppa_list[0].g.ch != ppa_list[i].g.ch); | |
1685 | #endif | |
a4bd217b | 1686 | |
3eaa11e2 | 1687 | ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000)); |
c5493845 RP |
1688 | if (ret == -ETIME || ret == -EINTR) |
1689 | pr_err("pblk: taking lun semaphore timed out: err %d\n", -ret); | |
a4bd217b JG |
1690 | } |
1691 | ||
3eaa11e2 JG |
1692 | void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas) |
1693 | { | |
1694 | struct nvm_tgt_dev *dev = pblk->dev; | |
1695 | struct nvm_geo *geo = &dev->geo; | |
1696 | int pos = pblk_ppa_to_pos(geo, ppa_list[0]); | |
1697 | ||
1698 | __pblk_down_page(pblk, ppa_list, nr_ppas, pos); | |
1699 | } | |
1700 | ||
1701 | void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, | |
1702 | unsigned long *lun_bitmap) | |
1703 | { | |
1704 | struct nvm_tgt_dev *dev = pblk->dev; | |
1705 | struct nvm_geo *geo = &dev->geo; | |
1706 | int pos = pblk_ppa_to_pos(geo, ppa_list[0]); | |
1707 | ||
1708 | /* If the LUN has been locked for this same request, do no attempt to | |
1709 | * lock it again | |
1710 | */ | |
1711 | if (test_and_set_bit(pos, lun_bitmap)) | |
1712 | return; | |
1713 | ||
1714 | __pblk_down_page(pblk, ppa_list, nr_ppas, pos); | |
1715 | } | |
1716 | ||
1717 | void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas) | |
1718 | { | |
1719 | struct nvm_tgt_dev *dev = pblk->dev; | |
1720 | struct nvm_geo *geo = &dev->geo; | |
1721 | struct pblk_lun *rlun; | |
1722 | int pos = pblk_ppa_to_pos(geo, ppa_list[0]); | |
1723 | ||
1724 | #ifdef CONFIG_NVM_DEBUG | |
1725 | int i; | |
1726 | ||
1727 | for (i = 1; i < nr_ppas; i++) | |
1728 | WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun || | |
1729 | ppa_list[0].g.ch != ppa_list[i].g.ch); | |
1730 | #endif | |
1731 | ||
1732 | rlun = &pblk->luns[pos]; | |
1733 | up(&rlun->wr_sem); | |
1734 | } | |
1735 | ||
a4bd217b JG |
1736 | void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, |
1737 | unsigned long *lun_bitmap) | |
1738 | { | |
1739 | struct nvm_tgt_dev *dev = pblk->dev; | |
1740 | struct nvm_geo *geo = &dev->geo; | |
1741 | struct pblk_lun *rlun; | |
fae7fae4 | 1742 | int nr_luns = geo->all_luns; |
a4bd217b JG |
1743 | int bit = -1; |
1744 | ||
1745 | while ((bit = find_next_bit(lun_bitmap, nr_luns, bit + 1)) < nr_luns) { | |
1746 | rlun = &pblk->luns[bit]; | |
1747 | up(&rlun->wr_sem); | |
1748 | } | |
a4bd217b JG |
1749 | } |
1750 | ||
1751 | void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa) | |
1752 | { | |
9f6cb13b | 1753 | struct ppa_addr ppa_l2p; |
a4bd217b JG |
1754 | |
1755 | /* logic error: lba out-of-bounds. Ignore update */ | |
1756 | if (!(lba < pblk->rl.nr_secs)) { | |
1757 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1758 | return; | |
1759 | } | |
1760 | ||
1761 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 1762 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
a4bd217b | 1763 | |
9f6cb13b JG |
1764 | if (!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p)) |
1765 | pblk_map_invalidate(pblk, ppa_l2p); | |
a4bd217b JG |
1766 | |
1767 | pblk_trans_map_set(pblk, lba, ppa); | |
1768 | spin_unlock(&pblk->trans_lock); | |
1769 | } | |
1770 | ||
1771 | void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa) | |
1772 | { | |
d340121e | 1773 | |
a4bd217b JG |
1774 | #ifdef CONFIG_NVM_DEBUG |
1775 | /* Callers must ensure that the ppa points to a cache address */ | |
1776 | BUG_ON(!pblk_addr_in_cache(ppa)); | |
1777 | BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa))); | |
1778 | #endif | |
1779 | ||
1780 | pblk_update_map(pblk, lba, ppa); | |
1781 | } | |
1782 | ||
9f6cb13b | 1783 | int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa_new, |
d340121e | 1784 | struct pblk_line *gc_line, u64 paddr_gc) |
a4bd217b | 1785 | { |
d340121e | 1786 | struct ppa_addr ppa_l2p, ppa_gc; |
a4bd217b JG |
1787 | int ret = 1; |
1788 | ||
1789 | #ifdef CONFIG_NVM_DEBUG | |
1790 | /* Callers must ensure that the ppa points to a cache address */ | |
9f6cb13b JG |
1791 | BUG_ON(!pblk_addr_in_cache(ppa_new)); |
1792 | BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa_new))); | |
a4bd217b JG |
1793 | #endif |
1794 | ||
1795 | /* logic error: lba out-of-bounds. Ignore update */ | |
1796 | if (!(lba < pblk->rl.nr_secs)) { | |
1797 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1798 | return 0; | |
1799 | } | |
1800 | ||
1801 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 1802 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
d340121e | 1803 | ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, gc_line->id); |
a4bd217b | 1804 | |
d340121e JG |
1805 | if (!pblk_ppa_comp(ppa_l2p, ppa_gc)) { |
1806 | spin_lock(&gc_line->lock); | |
1807 | WARN(!test_bit(paddr_gc, gc_line->invalid_bitmap), | |
1808 | "pblk: corrupted GC update"); | |
1809 | spin_unlock(&gc_line->lock); | |
9f6cb13b | 1810 | |
a4bd217b JG |
1811 | ret = 0; |
1812 | goto out; | |
1813 | } | |
1814 | ||
9f6cb13b | 1815 | pblk_trans_map_set(pblk, lba, ppa_new); |
a4bd217b JG |
1816 | out: |
1817 | spin_unlock(&pblk->trans_lock); | |
1818 | return ret; | |
1819 | } | |
1820 | ||
9f6cb13b JG |
1821 | void pblk_update_map_dev(struct pblk *pblk, sector_t lba, |
1822 | struct ppa_addr ppa_mapped, struct ppa_addr ppa_cache) | |
a4bd217b | 1823 | { |
9f6cb13b | 1824 | struct ppa_addr ppa_l2p; |
a4bd217b JG |
1825 | |
1826 | #ifdef CONFIG_NVM_DEBUG | |
1827 | /* Callers must ensure that the ppa points to a device address */ | |
9f6cb13b | 1828 | BUG_ON(pblk_addr_in_cache(ppa_mapped)); |
a4bd217b JG |
1829 | #endif |
1830 | /* Invalidate and discard padded entries */ | |
1831 | if (lba == ADDR_EMPTY) { | |
1832 | #ifdef CONFIG_NVM_DEBUG | |
1833 | atomic_long_inc(&pblk->padded_wb); | |
1834 | #endif | |
9f6cb13b JG |
1835 | if (!pblk_ppa_empty(ppa_mapped)) |
1836 | pblk_map_invalidate(pblk, ppa_mapped); | |
a4bd217b JG |
1837 | return; |
1838 | } | |
1839 | ||
1840 | /* logic error: lba out-of-bounds. Ignore update */ | |
1841 | if (!(lba < pblk->rl.nr_secs)) { | |
1842 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1843 | return; | |
1844 | } | |
1845 | ||
1846 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 1847 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
a4bd217b JG |
1848 | |
1849 | /* Do not update L2P if the cacheline has been updated. In this case, | |
1850 | * the mapped ppa must be invalidated | |
1851 | */ | |
9f6cb13b JG |
1852 | if (!pblk_ppa_comp(ppa_l2p, ppa_cache)) { |
1853 | if (!pblk_ppa_empty(ppa_mapped)) | |
1854 | pblk_map_invalidate(pblk, ppa_mapped); | |
a4bd217b JG |
1855 | goto out; |
1856 | } | |
1857 | ||
1858 | #ifdef CONFIG_NVM_DEBUG | |
9f6cb13b | 1859 | WARN_ON(!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p)); |
a4bd217b JG |
1860 | #endif |
1861 | ||
9f6cb13b | 1862 | pblk_trans_map_set(pblk, lba, ppa_mapped); |
a4bd217b JG |
1863 | out: |
1864 | spin_unlock(&pblk->trans_lock); | |
1865 | } | |
1866 | ||
1867 | void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas, | |
1868 | sector_t blba, int nr_secs) | |
1869 | { | |
1870 | int i; | |
1871 | ||
1872 | spin_lock(&pblk->trans_lock); | |
7bd4d370 JG |
1873 | for (i = 0; i < nr_secs; i++) { |
1874 | struct ppa_addr ppa; | |
1875 | ||
1876 | ppa = ppas[i] = pblk_trans_map_get(pblk, blba + i); | |
1877 | ||
1878 | /* If the L2P entry maps to a line, the reference is valid */ | |
1879 | if (!pblk_ppa_empty(ppa) && !pblk_addr_in_cache(ppa)) { | |
b1bcfda1 | 1880 | int line_id = pblk_ppa_to_line(ppa); |
7bd4d370 JG |
1881 | struct pblk_line *line = &pblk->lines[line_id]; |
1882 | ||
1883 | kref_get(&line->ref); | |
1884 | } | |
1885 | } | |
a4bd217b JG |
1886 | spin_unlock(&pblk->trans_lock); |
1887 | } | |
1888 | ||
1889 | void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas, | |
1890 | u64 *lba_list, int nr_secs) | |
1891 | { | |
d340121e | 1892 | u64 lba; |
a4bd217b JG |
1893 | int i; |
1894 | ||
1895 | spin_lock(&pblk->trans_lock); | |
1896 | for (i = 0; i < nr_secs; i++) { | |
1897 | lba = lba_list[i]; | |
d340121e | 1898 | if (lba != ADDR_EMPTY) { |
a4bd217b JG |
1899 | /* logic error: lba out-of-bounds. Ignore update */ |
1900 | if (!(lba < pblk->rl.nr_secs)) { | |
1901 | WARN(1, "pblk: corrupted L2P map request\n"); | |
1902 | continue; | |
1903 | } | |
1904 | ppas[i] = pblk_trans_map_get(pblk, lba); | |
1905 | } | |
1906 | } | |
1907 | spin_unlock(&pblk->trans_lock); | |
1908 | } |