Commit | Line | Data |
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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-write.c - pblk's write path from write buffer to media | |
16 | */ | |
17 | ||
18 | #include "pblk.h" | |
19 | ||
a4bd217b JG |
20 | static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd, |
21 | struct pblk_c_ctx *c_ctx) | |
22 | { | |
a4bd217b JG |
23 | struct bio *original_bio; |
24 | unsigned long ret; | |
25 | int i; | |
26 | ||
27 | for (i = 0; i < c_ctx->nr_valid; i++) { | |
28 | struct pblk_w_ctx *w_ctx; | |
a4bd217b JG |
29 | |
30 | w_ctx = pblk_rb_w_ctx(&pblk->rwb, c_ctx->sentry + i); | |
a4bd217b JG |
31 | while ((original_bio = bio_list_pop(&w_ctx->bios))) |
32 | bio_endio(original_bio); | |
33 | } | |
34 | ||
cd8ddbf7 JG |
35 | if (c_ctx->nr_padded) |
36 | pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid, | |
37 | c_ctx->nr_padded); | |
38 | ||
a4bd217b | 39 | #ifdef CONFIG_NVM_DEBUG |
e0e12a70 | 40 | atomic_long_add(rqd->nr_ppas, &pblk->sync_writes); |
a4bd217b JG |
41 | #endif |
42 | ||
43 | ret = pblk_rb_sync_advance(&pblk->rwb, c_ctx->nr_valid); | |
44 | ||
a4bd217b | 45 | bio_put(rqd->bio); |
e2cddf20 | 46 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
a4bd217b JG |
47 | |
48 | return ret; | |
49 | } | |
50 | ||
51 | static unsigned long pblk_end_queued_w_bio(struct pblk *pblk, | |
52 | struct nvm_rq *rqd, | |
53 | struct pblk_c_ctx *c_ctx) | |
54 | { | |
55 | list_del(&c_ctx->list); | |
56 | return pblk_end_w_bio(pblk, rqd, c_ctx); | |
57 | } | |
58 | ||
59 | static void pblk_complete_write(struct pblk *pblk, struct nvm_rq *rqd, | |
60 | struct pblk_c_ctx *c_ctx) | |
61 | { | |
62 | struct pblk_c_ctx *c, *r; | |
63 | unsigned long flags; | |
64 | unsigned long pos; | |
65 | ||
66 | #ifdef CONFIG_NVM_DEBUG | |
67 | atomic_long_sub(c_ctx->nr_valid, &pblk->inflight_writes); | |
68 | #endif | |
69 | ||
70 | pblk_up_rq(pblk, rqd->ppa_list, rqd->nr_ppas, c_ctx->lun_bitmap); | |
71 | ||
72 | pos = pblk_rb_sync_init(&pblk->rwb, &flags); | |
73 | if (pos == c_ctx->sentry) { | |
74 | pos = pblk_end_w_bio(pblk, rqd, c_ctx); | |
75 | ||
76 | retry: | |
77 | list_for_each_entry_safe(c, r, &pblk->compl_list, list) { | |
78 | rqd = nvm_rq_from_c_ctx(c); | |
79 | if (c->sentry == pos) { | |
80 | pos = pblk_end_queued_w_bio(pblk, rqd, c); | |
81 | goto retry; | |
82 | } | |
83 | } | |
84 | } else { | |
85 | WARN_ON(nvm_rq_from_c_ctx(c_ctx) != rqd); | |
86 | list_add_tail(&c_ctx->list, &pblk->compl_list); | |
87 | } | |
88 | pblk_rb_sync_end(&pblk->rwb, &flags); | |
89 | } | |
90 | ||
91 | /* When a write fails, we are not sure whether the block has grown bad or a page | |
92 | * range is more susceptible to write errors. If a high number of pages fail, we | |
93 | * assume that the block is bad and we mark it accordingly. In all cases, we | |
94 | * remap and resubmit the failed entries as fast as possible; if a flush is | |
95 | * waiting on a completion, the whole stack would stall otherwise. | |
96 | */ | |
97 | static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd) | |
98 | { | |
99 | void *comp_bits = &rqd->ppa_status; | |
100 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
101 | struct pblk_rec_ctx *recovery; | |
102 | struct ppa_addr *ppa_list = rqd->ppa_list; | |
103 | int nr_ppas = rqd->nr_ppas; | |
104 | unsigned int c_entries; | |
105 | int bit, ret; | |
106 | ||
107 | if (unlikely(nr_ppas == 1)) | |
108 | ppa_list = &rqd->ppa_addr; | |
109 | ||
110 | recovery = mempool_alloc(pblk->rec_pool, GFP_ATOMIC); | |
2942f50f | 111 | |
a4bd217b JG |
112 | INIT_LIST_HEAD(&recovery->failed); |
113 | ||
114 | bit = -1; | |
115 | while ((bit = find_next_bit(comp_bits, nr_ppas, bit + 1)) < nr_ppas) { | |
116 | struct pblk_rb_entry *entry; | |
117 | struct ppa_addr ppa; | |
118 | ||
119 | /* Logic error */ | |
120 | if (bit > c_ctx->nr_valid) { | |
2a79efd8 | 121 | WARN_ONCE(1, "pblk: corrupted write request\n"); |
33db9fd4 | 122 | mempool_free(recovery, pblk->rec_pool); |
a4bd217b JG |
123 | goto out; |
124 | } | |
125 | ||
126 | ppa = ppa_list[bit]; | |
127 | entry = pblk_rb_sync_scan_entry(&pblk->rwb, &ppa); | |
128 | if (!entry) { | |
129 | pr_err("pblk: could not scan entry on write failure\n"); | |
33db9fd4 | 130 | mempool_free(recovery, pblk->rec_pool); |
a4bd217b JG |
131 | goto out; |
132 | } | |
133 | ||
134 | /* The list is filled first and emptied afterwards. No need for | |
135 | * protecting it with a lock | |
136 | */ | |
137 | list_add_tail(&entry->index, &recovery->failed); | |
138 | } | |
139 | ||
140 | c_entries = find_first_bit(comp_bits, nr_ppas); | |
141 | ret = pblk_recov_setup_rq(pblk, c_ctx, recovery, comp_bits, c_entries); | |
142 | if (ret) { | |
143 | pr_err("pblk: could not recover from write failure\n"); | |
33db9fd4 | 144 | mempool_free(recovery, pblk->rec_pool); |
a4bd217b JG |
145 | goto out; |
146 | } | |
147 | ||
148 | INIT_WORK(&recovery->ws_rec, pblk_submit_rec); | |
ef576494 | 149 | queue_work(pblk->close_wq, &recovery->ws_rec); |
a4bd217b JG |
150 | |
151 | out: | |
152 | pblk_complete_write(pblk, rqd, c_ctx); | |
153 | } | |
154 | ||
155 | static void pblk_end_io_write(struct nvm_rq *rqd) | |
156 | { | |
157 | struct pblk *pblk = rqd->private; | |
158 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
159 | ||
160 | if (rqd->error) { | |
161 | pblk_log_write_err(pblk, rqd); | |
162 | return pblk_end_w_fail(pblk, rqd); | |
163 | } | |
164 | #ifdef CONFIG_NVM_DEBUG | |
165 | else | |
4e4cbee9 | 166 | WARN_ONCE(rqd->bio->bi_status, "pblk: corrupted write error\n"); |
a4bd217b JG |
167 | #endif |
168 | ||
169 | pblk_complete_write(pblk, rqd, c_ctx); | |
588726d3 | 170 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
171 | } |
172 | ||
dd2a4343 JG |
173 | static void pblk_end_io_write_meta(struct nvm_rq *rqd) |
174 | { | |
175 | struct pblk *pblk = rqd->private; | |
dd2a4343 JG |
176 | struct pblk_g_ctx *m_ctx = nvm_rq_to_pdu(rqd); |
177 | struct pblk_line *line = m_ctx->private; | |
178 | struct pblk_emeta *emeta = line->emeta; | |
dd2a4343 JG |
179 | int sync; |
180 | ||
3eaa11e2 | 181 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
dd2a4343 JG |
182 | |
183 | if (rqd->error) { | |
184 | pblk_log_write_err(pblk, rqd); | |
ee8d5c1a | 185 | pr_err("pblk: metadata I/O failed. Line %d\n", line->id); |
dd2a4343 | 186 | } |
dd2a4343 JG |
187 | |
188 | sync = atomic_add_return(rqd->nr_ppas, &emeta->sync); | |
189 | if (sync == emeta->nr_entries) | |
b84ae4a8 JG |
190 | pblk_gen_run_ws(pblk, line, NULL, pblk_line_close_ws, |
191 | GFP_ATOMIC, pblk->close_wq); | |
dd2a4343 | 192 | |
e2cddf20 | 193 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
588726d3 JG |
194 | |
195 | atomic_dec(&pblk->inflight_io); | |
dd2a4343 JG |
196 | } |
197 | ||
a4bd217b | 198 | static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd, |
dd2a4343 JG |
199 | unsigned int nr_secs, |
200 | nvm_end_io_fn(*end_io)) | |
a4bd217b JG |
201 | { |
202 | struct nvm_tgt_dev *dev = pblk->dev; | |
203 | ||
204 | /* Setup write request */ | |
205 | rqd->opcode = NVM_OP_PWRITE; | |
206 | rqd->nr_ppas = nr_secs; | |
e2cddf20 | 207 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b | 208 | rqd->private = pblk; |
dd2a4343 | 209 | rqd->end_io = end_io; |
a4bd217b JG |
210 | |
211 | rqd->meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, | |
212 | &rqd->dma_meta_list); | |
213 | if (!rqd->meta_list) | |
214 | return -ENOMEM; | |
215 | ||
a4bd217b JG |
216 | rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size; |
217 | rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static int pblk_setup_w_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
1e82123d | 223 | struct ppa_addr *erase_ppa) |
a4bd217b JG |
224 | { |
225 | struct pblk_line_meta *lm = &pblk->lm; | |
d624f371 | 226 | struct pblk_line *e_line = pblk_line_get_erase(pblk); |
1e82123d | 227 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); |
a4bd217b JG |
228 | unsigned int valid = c_ctx->nr_valid; |
229 | unsigned int padded = c_ctx->nr_padded; | |
230 | unsigned int nr_secs = valid + padded; | |
231 | unsigned long *lun_bitmap; | |
1e82123d | 232 | int ret; |
a4bd217b JG |
233 | |
234 | lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL); | |
d624f371 JG |
235 | if (!lun_bitmap) |
236 | return -ENOMEM; | |
a4bd217b JG |
237 | c_ctx->lun_bitmap = lun_bitmap; |
238 | ||
dd2a4343 | 239 | ret = pblk_alloc_w_rq(pblk, rqd, nr_secs, pblk_end_io_write); |
a4bd217b JG |
240 | if (ret) { |
241 | kfree(lun_bitmap); | |
d624f371 | 242 | return ret; |
a4bd217b JG |
243 | } |
244 | ||
588726d3 | 245 | if (likely(!e_line || !atomic_read(&e_line->left_eblks))) |
a4bd217b JG |
246 | pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, valid, 0); |
247 | else | |
248 | pblk_map_erase_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, | |
d624f371 | 249 | valid, erase_ppa); |
a4bd217b | 250 | |
d624f371 | 251 | return 0; |
a4bd217b JG |
252 | } |
253 | ||
254 | int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
255 | struct pblk_c_ctx *c_ctx) | |
256 | { | |
257 | struct pblk_line_meta *lm = &pblk->lm; | |
258 | unsigned long *lun_bitmap; | |
259 | int ret; | |
260 | ||
261 | lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL); | |
262 | if (!lun_bitmap) | |
263 | return -ENOMEM; | |
264 | ||
265 | c_ctx->lun_bitmap = lun_bitmap; | |
266 | ||
dd2a4343 | 267 | ret = pblk_alloc_w_rq(pblk, rqd, rqd->nr_ppas, pblk_end_io_write); |
a4bd217b JG |
268 | if (ret) |
269 | return ret; | |
270 | ||
271 | pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, c_ctx->nr_valid, 0); | |
272 | ||
273 | rqd->ppa_status = (u64)0; | |
e2cddf20 | 274 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b JG |
275 | |
276 | return ret; | |
277 | } | |
278 | ||
279 | static int pblk_calc_secs_to_sync(struct pblk *pblk, unsigned int secs_avail, | |
280 | unsigned int secs_to_flush) | |
281 | { | |
282 | int secs_to_sync; | |
283 | ||
284 | secs_to_sync = pblk_calc_secs(pblk, secs_avail, secs_to_flush); | |
285 | ||
286 | #ifdef CONFIG_NVM_DEBUG | |
287 | if ((!secs_to_sync && secs_to_flush) | |
288 | || (secs_to_sync < 0) | |
289 | || (secs_to_sync > secs_avail && !secs_to_flush)) { | |
290 | pr_err("pblk: bad sector calculation (a:%d,s:%d,f:%d)\n", | |
291 | secs_avail, secs_to_sync, secs_to_flush); | |
292 | } | |
293 | #endif | |
294 | ||
295 | return secs_to_sync; | |
296 | } | |
297 | ||
dd2a4343 JG |
298 | int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line) |
299 | { | |
300 | struct nvm_tgt_dev *dev = pblk->dev; | |
301 | struct nvm_geo *geo = &dev->geo; | |
302 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
303 | struct pblk_line_meta *lm = &pblk->lm; | |
304 | struct pblk_emeta *emeta = meta_line->emeta; | |
305 | struct pblk_g_ctx *m_ctx; | |
dd2a4343 JG |
306 | struct bio *bio; |
307 | struct nvm_rq *rqd; | |
308 | void *data; | |
309 | u64 paddr; | |
310 | int rq_ppas = pblk->min_write_pgs; | |
311 | int id = meta_line->id; | |
312 | int rq_len; | |
313 | int i, j; | |
314 | int ret; | |
315 | ||
e2cddf20 | 316 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); |
2942f50f | 317 | |
dd2a4343 JG |
318 | m_ctx = nvm_rq_to_pdu(rqd); |
319 | m_ctx->private = meta_line; | |
320 | ||
321 | rq_len = rq_ppas * geo->sec_size; | |
322 | data = ((void *)emeta->buf) + emeta->mem; | |
323 | ||
de54e703 JG |
324 | bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len, |
325 | l_mg->emeta_alloc_type, GFP_KERNEL); | |
dd2a4343 JG |
326 | if (IS_ERR(bio)) { |
327 | ret = PTR_ERR(bio); | |
328 | goto fail_free_rqd; | |
329 | } | |
330 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
331 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
332 | rqd->bio = bio; | |
333 | ||
334 | ret = pblk_alloc_w_rq(pblk, rqd, rq_ppas, pblk_end_io_write_meta); | |
335 | if (ret) | |
336 | goto fail_free_bio; | |
337 | ||
338 | for (i = 0; i < rqd->nr_ppas; ) { | |
339 | spin_lock(&meta_line->lock); | |
340 | paddr = __pblk_alloc_page(pblk, meta_line, rq_ppas); | |
341 | spin_unlock(&meta_line->lock); | |
342 | for (j = 0; j < rq_ppas; j++, i++, paddr++) | |
343 | rqd->ppa_list[i] = addr_to_gen_ppa(pblk, paddr, id); | |
344 | } | |
345 | ||
dd2a4343 JG |
346 | emeta->mem += rq_len; |
347 | if (emeta->mem >= lm->emeta_len[0]) { | |
348 | spin_lock(&l_mg->close_lock); | |
349 | list_del(&meta_line->list); | |
dd2a4343 JG |
350 | spin_unlock(&l_mg->close_lock); |
351 | } | |
352 | ||
3eaa11e2 JG |
353 | pblk_down_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
354 | ||
dd2a4343 JG |
355 | ret = pblk_submit_io(pblk, rqd); |
356 | if (ret) { | |
357 | pr_err("pblk: emeta I/O submission failed: %d\n", ret); | |
358 | goto fail_rollback; | |
359 | } | |
360 | ||
361 | return NVM_IO_OK; | |
362 | ||
363 | fail_rollback: | |
3eaa11e2 | 364 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
dd2a4343 JG |
365 | spin_lock(&l_mg->close_lock); |
366 | pblk_dealloc_page(pblk, meta_line, rq_ppas); | |
367 | list_add(&meta_line->list, &meta_line->list); | |
368 | spin_unlock(&l_mg->close_lock); | |
369 | fail_free_bio: | |
55e836d4 | 370 | bio_put(bio); |
dd2a4343 | 371 | fail_free_rqd: |
e2cddf20 | 372 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
dd2a4343 JG |
373 | return ret; |
374 | } | |
375 | ||
1e82123d JG |
376 | static inline bool pblk_valid_meta_ppa(struct pblk *pblk, |
377 | struct pblk_line *meta_line, | |
378 | struct nvm_rq *data_rqd) | |
379 | { | |
380 | struct nvm_tgt_dev *dev = pblk->dev; | |
381 | struct nvm_geo *geo = &dev->geo; | |
382 | struct pblk_c_ctx *data_c_ctx = nvm_rq_to_pdu(data_rqd); | |
383 | struct pblk_line *data_line = pblk_line_get_data(pblk); | |
384 | struct ppa_addr ppa, ppa_opt; | |
385 | u64 paddr; | |
386 | int pos_opt; | |
387 | ||
388 | /* Schedule a metadata I/O that is half the distance from the data I/O | |
389 | * with regards to the number of LUNs forming the pblk instance. This | |
390 | * balances LUN conflicts across every I/O. | |
391 | * | |
392 | * When the LUN configuration changes (e.g., due to GC), this distance | |
393 | * can align, which would result on metadata and data I/Os colliding. In | |
394 | * this case, modify the distance to not be optimal, but move the | |
395 | * optimal in the right direction. | |
396 | */ | |
397 | paddr = pblk_lookup_page(pblk, meta_line); | |
398 | ppa = addr_to_gen_ppa(pblk, paddr, 0); | |
399 | ppa_opt = addr_to_gen_ppa(pblk, paddr + data_line->meta_distance, 0); | |
400 | pos_opt = pblk_ppa_to_pos(geo, ppa_opt); | |
401 | ||
402 | if (test_bit(pos_opt, data_c_ctx->lun_bitmap) || | |
403 | test_bit(pos_opt, data_line->blk_bitmap)) | |
404 | return true; | |
405 | ||
406 | if (unlikely(pblk_ppa_comp(ppa_opt, ppa))) | |
407 | data_line->meta_distance--; | |
408 | ||
409 | return false; | |
410 | } | |
411 | ||
412 | static struct pblk_line *pblk_should_submit_meta_io(struct pblk *pblk, | |
413 | struct nvm_rq *data_rqd) | |
dd2a4343 JG |
414 | { |
415 | struct pblk_line_meta *lm = &pblk->lm; | |
416 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
417 | struct pblk_line *meta_line; | |
418 | ||
419 | spin_lock(&l_mg->close_lock); | |
420 | retry: | |
421 | if (list_empty(&l_mg->emeta_list)) { | |
422 | spin_unlock(&l_mg->close_lock); | |
1e82123d | 423 | return NULL; |
dd2a4343 JG |
424 | } |
425 | meta_line = list_first_entry(&l_mg->emeta_list, struct pblk_line, list); | |
e72ec1d3 | 426 | if (meta_line->emeta->mem >= lm->emeta_len[0]) |
dd2a4343 JG |
427 | goto retry; |
428 | spin_unlock(&l_mg->close_lock); | |
429 | ||
1e82123d JG |
430 | if (!pblk_valid_meta_ppa(pblk, meta_line, data_rqd)) |
431 | return NULL; | |
dd2a4343 | 432 | |
1e82123d | 433 | return meta_line; |
dd2a4343 JG |
434 | } |
435 | ||
d624f371 JG |
436 | static int pblk_submit_io_set(struct pblk *pblk, struct nvm_rq *rqd) |
437 | { | |
d624f371 | 438 | struct ppa_addr erase_ppa; |
1e82123d | 439 | struct pblk_line *meta_line; |
d624f371 JG |
440 | int err; |
441 | ||
26f76dce | 442 | pblk_ppa_set_empty(&erase_ppa); |
d624f371 JG |
443 | |
444 | /* Assign lbas to ppas and populate request structure */ | |
1e82123d | 445 | err = pblk_setup_w_rq(pblk, rqd, &erase_ppa); |
d624f371 JG |
446 | if (err) { |
447 | pr_err("pblk: could not setup write request: %d\n", err); | |
448 | return NVM_IO_ERR; | |
449 | } | |
450 | ||
1e82123d | 451 | meta_line = pblk_should_submit_meta_io(pblk, rqd); |
dd2a4343 | 452 | |
1e82123d JG |
453 | /* Submit data write for current data line */ |
454 | err = pblk_submit_io(pblk, rqd); | |
455 | if (err) { | |
456 | pr_err("pblk: data I/O submission failed: %d\n", err); | |
457 | return NVM_IO_ERR; | |
458 | } | |
d624f371 | 459 | |
26f76dce | 460 | if (!pblk_ppa_empty(erase_ppa)) { |
1e82123d | 461 | /* Submit erase for next data line */ |
dd2a4343 JG |
462 | if (pblk_blk_erase_async(pblk, erase_ppa)) { |
463 | struct pblk_line *e_line = pblk_line_get_erase(pblk); | |
464 | struct nvm_tgt_dev *dev = pblk->dev; | |
465 | struct nvm_geo *geo = &dev->geo; | |
466 | int bit; | |
467 | ||
468 | atomic_inc(&e_line->left_eblks); | |
469 | bit = pblk_ppa_to_pos(geo, erase_ppa); | |
470 | WARN_ON(!test_and_clear_bit(bit, e_line->erase_bitmap)); | |
471 | } | |
d624f371 JG |
472 | } |
473 | ||
1e82123d JG |
474 | if (meta_line) { |
475 | /* Submit metadata write for previous data line */ | |
476 | err = pblk_submit_meta_io(pblk, meta_line); | |
477 | if (err) { | |
478 | pr_err("pblk: metadata I/O submission failed: %d", err); | |
479 | return NVM_IO_ERR; | |
480 | } | |
481 | } | |
482 | ||
d624f371 JG |
483 | return NVM_IO_OK; |
484 | } | |
485 | ||
486 | static void pblk_free_write_rqd(struct pblk *pblk, struct nvm_rq *rqd) | |
487 | { | |
488 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
489 | struct bio *bio = rqd->bio; | |
490 | ||
491 | if (c_ctx->nr_padded) | |
cd8ddbf7 JG |
492 | pblk_bio_free_pages(pblk, bio, c_ctx->nr_valid, |
493 | c_ctx->nr_padded); | |
d624f371 JG |
494 | } |
495 | ||
a4bd217b JG |
496 | static int pblk_submit_write(struct pblk *pblk) |
497 | { | |
498 | struct bio *bio; | |
499 | struct nvm_rq *rqd; | |
a4bd217b JG |
500 | unsigned int secs_avail, secs_to_sync, secs_to_com; |
501 | unsigned int secs_to_flush; | |
502 | unsigned long pos; | |
a4bd217b JG |
503 | |
504 | /* If there are no sectors in the cache, flushes (bios without data) | |
505 | * will be cleared on the cache threads | |
506 | */ | |
507 | secs_avail = pblk_rb_read_count(&pblk->rwb); | |
508 | if (!secs_avail) | |
509 | return 1; | |
510 | ||
511 | secs_to_flush = pblk_rb_sync_point_count(&pblk->rwb); | |
512 | if (!secs_to_flush && secs_avail < pblk->min_write_pgs) | |
513 | return 1; | |
514 | ||
a4bd217b JG |
515 | secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, secs_to_flush); |
516 | if (secs_to_sync > pblk->max_write_pgs) { | |
517 | pr_err("pblk: bad buffer sync calculation\n"); | |
875d94f3 | 518 | return 1; |
a4bd217b JG |
519 | } |
520 | ||
521 | secs_to_com = (secs_to_sync > secs_avail) ? secs_avail : secs_to_sync; | |
522 | pos = pblk_rb_read_commit(&pblk->rwb, secs_to_com); | |
523 | ||
875d94f3 JG |
524 | bio = bio_alloc(GFP_KERNEL, secs_to_sync); |
525 | ||
526 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
527 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
528 | ||
e2cddf20 | 529 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE); |
875d94f3 JG |
530 | rqd->bio = bio; |
531 | ||
532 | if (pblk_rb_read_to_bio(&pblk->rwb, rqd, pos, secs_to_sync, | |
d624f371 | 533 | secs_avail)) { |
a4bd217b JG |
534 | pr_err("pblk: corrupted write bio\n"); |
535 | goto fail_put_bio; | |
536 | } | |
537 | ||
d624f371 | 538 | if (pblk_submit_io_set(pblk, rqd)) |
a4bd217b | 539 | goto fail_free_bio; |
a4bd217b JG |
540 | |
541 | #ifdef CONFIG_NVM_DEBUG | |
542 | atomic_long_add(secs_to_sync, &pblk->sub_writes); | |
543 | #endif | |
544 | ||
545 | return 0; | |
546 | ||
547 | fail_free_bio: | |
d624f371 | 548 | pblk_free_write_rqd(pblk, rqd); |
a4bd217b JG |
549 | fail_put_bio: |
550 | bio_put(bio); | |
e2cddf20 | 551 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
a4bd217b JG |
552 | |
553 | return 1; | |
554 | } | |
555 | ||
556 | int pblk_write_ts(void *data) | |
557 | { | |
558 | struct pblk *pblk = data; | |
559 | ||
560 | while (!kthread_should_stop()) { | |
561 | if (!pblk_submit_write(pblk)) | |
562 | continue; | |
563 | set_current_state(TASK_INTERRUPTIBLE); | |
564 | io_schedule(); | |
565 | } | |
566 | ||
567 | return 0; | |
568 | } |