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 | 23 | struct bio *original_bio; |
533657c1 | 24 | struct pblk_rb *rwb = &pblk->rwb; |
a4bd217b JG |
25 | unsigned long ret; |
26 | int i; | |
27 | ||
28 | for (i = 0; i < c_ctx->nr_valid; i++) { | |
29 | struct pblk_w_ctx *w_ctx; | |
533657c1 HH |
30 | int pos = c_ctx->sentry + i; |
31 | int flags; | |
32 | ||
33 | w_ctx = pblk_rb_w_ctx(rwb, pos); | |
34 | flags = READ_ONCE(w_ctx->flags); | |
35 | ||
36 | if (flags & PBLK_FLUSH_ENTRY) { | |
37 | flags &= ~PBLK_FLUSH_ENTRY; | |
38 | /* Release flags on context. Protect from writes */ | |
39 | smp_store_release(&w_ctx->flags, flags); | |
40 | ||
41 | #ifdef CONFIG_NVM_DEBUG | |
42 | atomic_dec(&rwb->inflight_flush_point); | |
43 | #endif | |
44 | } | |
a4bd217b | 45 | |
a4bd217b JG |
46 | while ((original_bio = bio_list_pop(&w_ctx->bios))) |
47 | bio_endio(original_bio); | |
48 | } | |
49 | ||
cd8ddbf7 JG |
50 | if (c_ctx->nr_padded) |
51 | pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid, | |
52 | c_ctx->nr_padded); | |
53 | ||
a4bd217b | 54 | #ifdef CONFIG_NVM_DEBUG |
e0e12a70 | 55 | atomic_long_add(rqd->nr_ppas, &pblk->sync_writes); |
a4bd217b JG |
56 | #endif |
57 | ||
58 | ret = pblk_rb_sync_advance(&pblk->rwb, c_ctx->nr_valid); | |
59 | ||
a4bd217b | 60 | bio_put(rqd->bio); |
e2cddf20 | 61 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
a4bd217b JG |
62 | |
63 | return ret; | |
64 | } | |
65 | ||
66 | static unsigned long pblk_end_queued_w_bio(struct pblk *pblk, | |
67 | struct nvm_rq *rqd, | |
68 | struct pblk_c_ctx *c_ctx) | |
69 | { | |
70 | list_del(&c_ctx->list); | |
71 | return pblk_end_w_bio(pblk, rqd, c_ctx); | |
72 | } | |
73 | ||
74 | static void pblk_complete_write(struct pblk *pblk, struct nvm_rq *rqd, | |
75 | struct pblk_c_ctx *c_ctx) | |
76 | { | |
77 | struct pblk_c_ctx *c, *r; | |
78 | unsigned long flags; | |
79 | unsigned long pos; | |
80 | ||
81 | #ifdef CONFIG_NVM_DEBUG | |
82 | atomic_long_sub(c_ctx->nr_valid, &pblk->inflight_writes); | |
83 | #endif | |
84 | ||
85 | pblk_up_rq(pblk, rqd->ppa_list, rqd->nr_ppas, c_ctx->lun_bitmap); | |
86 | ||
87 | pos = pblk_rb_sync_init(&pblk->rwb, &flags); | |
88 | if (pos == c_ctx->sentry) { | |
89 | pos = pblk_end_w_bio(pblk, rqd, c_ctx); | |
90 | ||
91 | retry: | |
92 | list_for_each_entry_safe(c, r, &pblk->compl_list, list) { | |
93 | rqd = nvm_rq_from_c_ctx(c); | |
94 | if (c->sentry == pos) { | |
95 | pos = pblk_end_queued_w_bio(pblk, rqd, c); | |
96 | goto retry; | |
97 | } | |
98 | } | |
99 | } else { | |
100 | WARN_ON(nvm_rq_from_c_ctx(c_ctx) != rqd); | |
101 | list_add_tail(&c_ctx->list, &pblk->compl_list); | |
102 | } | |
103 | pblk_rb_sync_end(&pblk->rwb, &flags); | |
104 | } | |
105 | ||
106 | /* When a write fails, we are not sure whether the block has grown bad or a page | |
107 | * range is more susceptible to write errors. If a high number of pages fail, we | |
108 | * assume that the block is bad and we mark it accordingly. In all cases, we | |
109 | * remap and resubmit the failed entries as fast as possible; if a flush is | |
110 | * waiting on a completion, the whole stack would stall otherwise. | |
111 | */ | |
112 | static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd) | |
113 | { | |
114 | void *comp_bits = &rqd->ppa_status; | |
115 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
116 | struct pblk_rec_ctx *recovery; | |
117 | struct ppa_addr *ppa_list = rqd->ppa_list; | |
118 | int nr_ppas = rqd->nr_ppas; | |
119 | unsigned int c_entries; | |
120 | int bit, ret; | |
121 | ||
122 | if (unlikely(nr_ppas == 1)) | |
123 | ppa_list = &rqd->ppa_addr; | |
124 | ||
b906bbb6 | 125 | recovery = mempool_alloc(&pblk->rec_pool, GFP_ATOMIC); |
2942f50f | 126 | |
a4bd217b JG |
127 | INIT_LIST_HEAD(&recovery->failed); |
128 | ||
129 | bit = -1; | |
130 | while ((bit = find_next_bit(comp_bits, nr_ppas, bit + 1)) < nr_ppas) { | |
131 | struct pblk_rb_entry *entry; | |
132 | struct ppa_addr ppa; | |
133 | ||
134 | /* Logic error */ | |
135 | if (bit > c_ctx->nr_valid) { | |
2a79efd8 | 136 | WARN_ONCE(1, "pblk: corrupted write request\n"); |
b906bbb6 | 137 | mempool_free(recovery, &pblk->rec_pool); |
a4bd217b JG |
138 | goto out; |
139 | } | |
140 | ||
141 | ppa = ppa_list[bit]; | |
142 | entry = pblk_rb_sync_scan_entry(&pblk->rwb, &ppa); | |
143 | if (!entry) { | |
144 | pr_err("pblk: could not scan entry on write failure\n"); | |
b906bbb6 | 145 | mempool_free(recovery, &pblk->rec_pool); |
a4bd217b JG |
146 | goto out; |
147 | } | |
148 | ||
149 | /* The list is filled first and emptied afterwards. No need for | |
150 | * protecting it with a lock | |
151 | */ | |
152 | list_add_tail(&entry->index, &recovery->failed); | |
153 | } | |
154 | ||
155 | c_entries = find_first_bit(comp_bits, nr_ppas); | |
156 | ret = pblk_recov_setup_rq(pblk, c_ctx, recovery, comp_bits, c_entries); | |
157 | if (ret) { | |
158 | pr_err("pblk: could not recover from write failure\n"); | |
b906bbb6 | 159 | mempool_free(recovery, &pblk->rec_pool); |
a4bd217b JG |
160 | goto out; |
161 | } | |
162 | ||
163 | INIT_WORK(&recovery->ws_rec, pblk_submit_rec); | |
ef576494 | 164 | queue_work(pblk->close_wq, &recovery->ws_rec); |
a4bd217b JG |
165 | |
166 | out: | |
167 | pblk_complete_write(pblk, rqd, c_ctx); | |
168 | } | |
169 | ||
170 | static void pblk_end_io_write(struct nvm_rq *rqd) | |
171 | { | |
172 | struct pblk *pblk = rqd->private; | |
173 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
174 | ||
175 | if (rqd->error) { | |
176 | pblk_log_write_err(pblk, rqd); | |
177 | return pblk_end_w_fail(pblk, rqd); | |
178 | } | |
179 | #ifdef CONFIG_NVM_DEBUG | |
180 | else | |
4e4cbee9 | 181 | WARN_ONCE(rqd->bio->bi_status, "pblk: corrupted write error\n"); |
a4bd217b JG |
182 | #endif |
183 | ||
184 | pblk_complete_write(pblk, rqd, c_ctx); | |
588726d3 | 185 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
186 | } |
187 | ||
dd2a4343 JG |
188 | static void pblk_end_io_write_meta(struct nvm_rq *rqd) |
189 | { | |
190 | struct pblk *pblk = rqd->private; | |
dd2a4343 JG |
191 | struct pblk_g_ctx *m_ctx = nvm_rq_to_pdu(rqd); |
192 | struct pblk_line *line = m_ctx->private; | |
193 | struct pblk_emeta *emeta = line->emeta; | |
dd2a4343 JG |
194 | int sync; |
195 | ||
3eaa11e2 | 196 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
dd2a4343 JG |
197 | |
198 | if (rqd->error) { | |
199 | pblk_log_write_err(pblk, rqd); | |
ee8d5c1a | 200 | pr_err("pblk: metadata I/O failed. Line %d\n", line->id); |
dd2a4343 | 201 | } |
dd2a4343 JG |
202 | |
203 | sync = atomic_add_return(rqd->nr_ppas, &emeta->sync); | |
204 | if (sync == emeta->nr_entries) | |
b84ae4a8 JG |
205 | pblk_gen_run_ws(pblk, line, NULL, pblk_line_close_ws, |
206 | GFP_ATOMIC, pblk->close_wq); | |
dd2a4343 | 207 | |
e2cddf20 | 208 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
588726d3 JG |
209 | |
210 | atomic_dec(&pblk->inflight_io); | |
dd2a4343 JG |
211 | } |
212 | ||
a4bd217b | 213 | static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd, |
dd2a4343 JG |
214 | unsigned int nr_secs, |
215 | nvm_end_io_fn(*end_io)) | |
a4bd217b JG |
216 | { |
217 | struct nvm_tgt_dev *dev = pblk->dev; | |
218 | ||
219 | /* Setup write request */ | |
220 | rqd->opcode = NVM_OP_PWRITE; | |
221 | rqd->nr_ppas = nr_secs; | |
e2cddf20 | 222 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b | 223 | rqd->private = pblk; |
dd2a4343 | 224 | rqd->end_io = end_io; |
a4bd217b JG |
225 | |
226 | rqd->meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, | |
227 | &rqd->dma_meta_list); | |
228 | if (!rqd->meta_list) | |
229 | return -ENOMEM; | |
230 | ||
a4bd217b JG |
231 | rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size; |
232 | rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size; | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int pblk_setup_w_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
1e82123d | 238 | struct ppa_addr *erase_ppa) |
a4bd217b JG |
239 | { |
240 | struct pblk_line_meta *lm = &pblk->lm; | |
d624f371 | 241 | struct pblk_line *e_line = pblk_line_get_erase(pblk); |
1e82123d | 242 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); |
a4bd217b JG |
243 | unsigned int valid = c_ctx->nr_valid; |
244 | unsigned int padded = c_ctx->nr_padded; | |
245 | unsigned int nr_secs = valid + padded; | |
246 | unsigned long *lun_bitmap; | |
1e82123d | 247 | int ret; |
a4bd217b JG |
248 | |
249 | lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL); | |
d624f371 JG |
250 | if (!lun_bitmap) |
251 | return -ENOMEM; | |
a4bd217b JG |
252 | c_ctx->lun_bitmap = lun_bitmap; |
253 | ||
dd2a4343 | 254 | ret = pblk_alloc_w_rq(pblk, rqd, nr_secs, pblk_end_io_write); |
a4bd217b JG |
255 | if (ret) { |
256 | kfree(lun_bitmap); | |
d624f371 | 257 | return ret; |
a4bd217b JG |
258 | } |
259 | ||
588726d3 | 260 | if (likely(!e_line || !atomic_read(&e_line->left_eblks))) |
a4bd217b JG |
261 | pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, valid, 0); |
262 | else | |
263 | pblk_map_erase_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, | |
d624f371 | 264 | valid, erase_ppa); |
a4bd217b | 265 | |
d624f371 | 266 | return 0; |
a4bd217b JG |
267 | } |
268 | ||
269 | int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
270 | struct pblk_c_ctx *c_ctx) | |
271 | { | |
272 | struct pblk_line_meta *lm = &pblk->lm; | |
273 | unsigned long *lun_bitmap; | |
274 | int ret; | |
275 | ||
276 | lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL); | |
277 | if (!lun_bitmap) | |
278 | return -ENOMEM; | |
279 | ||
280 | c_ctx->lun_bitmap = lun_bitmap; | |
281 | ||
dd2a4343 | 282 | ret = pblk_alloc_w_rq(pblk, rqd, rqd->nr_ppas, pblk_end_io_write); |
a4bd217b JG |
283 | if (ret) |
284 | return ret; | |
285 | ||
286 | pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, c_ctx->nr_valid, 0); | |
287 | ||
288 | rqd->ppa_status = (u64)0; | |
e2cddf20 | 289 | rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE); |
a4bd217b JG |
290 | |
291 | return ret; | |
292 | } | |
293 | ||
294 | static int pblk_calc_secs_to_sync(struct pblk *pblk, unsigned int secs_avail, | |
295 | unsigned int secs_to_flush) | |
296 | { | |
297 | int secs_to_sync; | |
298 | ||
299 | secs_to_sync = pblk_calc_secs(pblk, secs_avail, secs_to_flush); | |
300 | ||
301 | #ifdef CONFIG_NVM_DEBUG | |
302 | if ((!secs_to_sync && secs_to_flush) | |
303 | || (secs_to_sync < 0) | |
304 | || (secs_to_sync > secs_avail && !secs_to_flush)) { | |
305 | pr_err("pblk: bad sector calculation (a:%d,s:%d,f:%d)\n", | |
306 | secs_avail, secs_to_sync, secs_to_flush); | |
307 | } | |
308 | #endif | |
309 | ||
310 | return secs_to_sync; | |
311 | } | |
312 | ||
dd2a4343 JG |
313 | int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line) |
314 | { | |
315 | struct nvm_tgt_dev *dev = pblk->dev; | |
316 | struct nvm_geo *geo = &dev->geo; | |
317 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
318 | struct pblk_line_meta *lm = &pblk->lm; | |
319 | struct pblk_emeta *emeta = meta_line->emeta; | |
320 | struct pblk_g_ctx *m_ctx; | |
dd2a4343 JG |
321 | struct bio *bio; |
322 | struct nvm_rq *rqd; | |
323 | void *data; | |
324 | u64 paddr; | |
325 | int rq_ppas = pblk->min_write_pgs; | |
326 | int id = meta_line->id; | |
327 | int rq_len; | |
328 | int i, j; | |
329 | int ret; | |
330 | ||
e2cddf20 | 331 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); |
2942f50f | 332 | |
dd2a4343 JG |
333 | m_ctx = nvm_rq_to_pdu(rqd); |
334 | m_ctx->private = meta_line; | |
335 | ||
e46f4e48 | 336 | rq_len = rq_ppas * geo->csecs; |
dd2a4343 JG |
337 | data = ((void *)emeta->buf) + emeta->mem; |
338 | ||
de54e703 JG |
339 | bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len, |
340 | l_mg->emeta_alloc_type, GFP_KERNEL); | |
dd2a4343 JG |
341 | if (IS_ERR(bio)) { |
342 | ret = PTR_ERR(bio); | |
343 | goto fail_free_rqd; | |
344 | } | |
345 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
346 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
347 | rqd->bio = bio; | |
348 | ||
349 | ret = pblk_alloc_w_rq(pblk, rqd, rq_ppas, pblk_end_io_write_meta); | |
350 | if (ret) | |
351 | goto fail_free_bio; | |
352 | ||
353 | for (i = 0; i < rqd->nr_ppas; ) { | |
354 | spin_lock(&meta_line->lock); | |
355 | paddr = __pblk_alloc_page(pblk, meta_line, rq_ppas); | |
356 | spin_unlock(&meta_line->lock); | |
357 | for (j = 0; j < rq_ppas; j++, i++, paddr++) | |
358 | rqd->ppa_list[i] = addr_to_gen_ppa(pblk, paddr, id); | |
359 | } | |
360 | ||
dd2a4343 JG |
361 | emeta->mem += rq_len; |
362 | if (emeta->mem >= lm->emeta_len[0]) { | |
363 | spin_lock(&l_mg->close_lock); | |
364 | list_del(&meta_line->list); | |
dd2a4343 JG |
365 | spin_unlock(&l_mg->close_lock); |
366 | } | |
367 | ||
3eaa11e2 JG |
368 | pblk_down_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
369 | ||
dd2a4343 JG |
370 | ret = pblk_submit_io(pblk, rqd); |
371 | if (ret) { | |
372 | pr_err("pblk: emeta I/O submission failed: %d\n", ret); | |
373 | goto fail_rollback; | |
374 | } | |
375 | ||
376 | return NVM_IO_OK; | |
377 | ||
378 | fail_rollback: | |
3eaa11e2 | 379 | pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas); |
dd2a4343 JG |
380 | spin_lock(&l_mg->close_lock); |
381 | pblk_dealloc_page(pblk, meta_line, rq_ppas); | |
382 | list_add(&meta_line->list, &meta_line->list); | |
383 | spin_unlock(&l_mg->close_lock); | |
384 | fail_free_bio: | |
55e836d4 | 385 | bio_put(bio); |
dd2a4343 | 386 | fail_free_rqd: |
e2cddf20 | 387 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
dd2a4343 JG |
388 | return ret; |
389 | } | |
390 | ||
1e82123d JG |
391 | static inline bool pblk_valid_meta_ppa(struct pblk *pblk, |
392 | struct pblk_line *meta_line, | |
393 | struct nvm_rq *data_rqd) | |
394 | { | |
395 | struct nvm_tgt_dev *dev = pblk->dev; | |
396 | struct nvm_geo *geo = &dev->geo; | |
397 | struct pblk_c_ctx *data_c_ctx = nvm_rq_to_pdu(data_rqd); | |
398 | struct pblk_line *data_line = pblk_line_get_data(pblk); | |
399 | struct ppa_addr ppa, ppa_opt; | |
400 | u64 paddr; | |
401 | int pos_opt; | |
402 | ||
403 | /* Schedule a metadata I/O that is half the distance from the data I/O | |
404 | * with regards to the number of LUNs forming the pblk instance. This | |
405 | * balances LUN conflicts across every I/O. | |
406 | * | |
407 | * When the LUN configuration changes (e.g., due to GC), this distance | |
408 | * can align, which would result on metadata and data I/Os colliding. In | |
409 | * this case, modify the distance to not be optimal, but move the | |
410 | * optimal in the right direction. | |
411 | */ | |
412 | paddr = pblk_lookup_page(pblk, meta_line); | |
413 | ppa = addr_to_gen_ppa(pblk, paddr, 0); | |
414 | ppa_opt = addr_to_gen_ppa(pblk, paddr + data_line->meta_distance, 0); | |
415 | pos_opt = pblk_ppa_to_pos(geo, ppa_opt); | |
416 | ||
417 | if (test_bit(pos_opt, data_c_ctx->lun_bitmap) || | |
418 | test_bit(pos_opt, data_line->blk_bitmap)) | |
419 | return true; | |
420 | ||
421 | if (unlikely(pblk_ppa_comp(ppa_opt, ppa))) | |
422 | data_line->meta_distance--; | |
423 | ||
424 | return false; | |
425 | } | |
426 | ||
427 | static struct pblk_line *pblk_should_submit_meta_io(struct pblk *pblk, | |
428 | struct nvm_rq *data_rqd) | |
dd2a4343 JG |
429 | { |
430 | struct pblk_line_meta *lm = &pblk->lm; | |
431 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
432 | struct pblk_line *meta_line; | |
433 | ||
434 | spin_lock(&l_mg->close_lock); | |
435 | retry: | |
436 | if (list_empty(&l_mg->emeta_list)) { | |
437 | spin_unlock(&l_mg->close_lock); | |
1e82123d | 438 | return NULL; |
dd2a4343 JG |
439 | } |
440 | meta_line = list_first_entry(&l_mg->emeta_list, struct pblk_line, list); | |
e72ec1d3 | 441 | if (meta_line->emeta->mem >= lm->emeta_len[0]) |
dd2a4343 JG |
442 | goto retry; |
443 | spin_unlock(&l_mg->close_lock); | |
444 | ||
1e82123d JG |
445 | if (!pblk_valid_meta_ppa(pblk, meta_line, data_rqd)) |
446 | return NULL; | |
dd2a4343 | 447 | |
1e82123d | 448 | return meta_line; |
dd2a4343 JG |
449 | } |
450 | ||
d624f371 JG |
451 | static int pblk_submit_io_set(struct pblk *pblk, struct nvm_rq *rqd) |
452 | { | |
d624f371 | 453 | struct ppa_addr erase_ppa; |
1e82123d | 454 | struct pblk_line *meta_line; |
d624f371 JG |
455 | int err; |
456 | ||
26f76dce | 457 | pblk_ppa_set_empty(&erase_ppa); |
d624f371 JG |
458 | |
459 | /* Assign lbas to ppas and populate request structure */ | |
1e82123d | 460 | err = pblk_setup_w_rq(pblk, rqd, &erase_ppa); |
d624f371 JG |
461 | if (err) { |
462 | pr_err("pblk: could not setup write request: %d\n", err); | |
463 | return NVM_IO_ERR; | |
464 | } | |
465 | ||
1e82123d | 466 | meta_line = pblk_should_submit_meta_io(pblk, rqd); |
dd2a4343 | 467 | |
1e82123d JG |
468 | /* Submit data write for current data line */ |
469 | err = pblk_submit_io(pblk, rqd); | |
470 | if (err) { | |
471 | pr_err("pblk: data I/O submission failed: %d\n", err); | |
472 | return NVM_IO_ERR; | |
473 | } | |
d624f371 | 474 | |
26f76dce | 475 | if (!pblk_ppa_empty(erase_ppa)) { |
1e82123d | 476 | /* Submit erase for next data line */ |
dd2a4343 JG |
477 | if (pblk_blk_erase_async(pblk, erase_ppa)) { |
478 | struct pblk_line *e_line = pblk_line_get_erase(pblk); | |
479 | struct nvm_tgt_dev *dev = pblk->dev; | |
480 | struct nvm_geo *geo = &dev->geo; | |
481 | int bit; | |
482 | ||
483 | atomic_inc(&e_line->left_eblks); | |
484 | bit = pblk_ppa_to_pos(geo, erase_ppa); | |
485 | WARN_ON(!test_and_clear_bit(bit, e_line->erase_bitmap)); | |
486 | } | |
d624f371 JG |
487 | } |
488 | ||
1e82123d JG |
489 | if (meta_line) { |
490 | /* Submit metadata write for previous data line */ | |
491 | err = pblk_submit_meta_io(pblk, meta_line); | |
492 | if (err) { | |
493 | pr_err("pblk: metadata I/O submission failed: %d", err); | |
494 | return NVM_IO_ERR; | |
495 | } | |
496 | } | |
497 | ||
d624f371 JG |
498 | return NVM_IO_OK; |
499 | } | |
500 | ||
501 | static void pblk_free_write_rqd(struct pblk *pblk, struct nvm_rq *rqd) | |
502 | { | |
503 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
504 | struct bio *bio = rqd->bio; | |
505 | ||
506 | if (c_ctx->nr_padded) | |
cd8ddbf7 JG |
507 | pblk_bio_free_pages(pblk, bio, c_ctx->nr_valid, |
508 | c_ctx->nr_padded); | |
d624f371 JG |
509 | } |
510 | ||
a4bd217b JG |
511 | static int pblk_submit_write(struct pblk *pblk) |
512 | { | |
513 | struct bio *bio; | |
514 | struct nvm_rq *rqd; | |
a4bd217b JG |
515 | unsigned int secs_avail, secs_to_sync, secs_to_com; |
516 | unsigned int secs_to_flush; | |
517 | unsigned long pos; | |
a4bd217b JG |
518 | |
519 | /* If there are no sectors in the cache, flushes (bios without data) | |
520 | * will be cleared on the cache threads | |
521 | */ | |
522 | secs_avail = pblk_rb_read_count(&pblk->rwb); | |
523 | if (!secs_avail) | |
524 | return 1; | |
525 | ||
8154d296 | 526 | secs_to_flush = pblk_rb_flush_point_count(&pblk->rwb); |
a4bd217b JG |
527 | if (!secs_to_flush && secs_avail < pblk->min_write_pgs) |
528 | return 1; | |
529 | ||
a4bd217b JG |
530 | secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, secs_to_flush); |
531 | if (secs_to_sync > pblk->max_write_pgs) { | |
532 | pr_err("pblk: bad buffer sync calculation\n"); | |
875d94f3 | 533 | return 1; |
a4bd217b JG |
534 | } |
535 | ||
536 | secs_to_com = (secs_to_sync > secs_avail) ? secs_avail : secs_to_sync; | |
537 | pos = pblk_rb_read_commit(&pblk->rwb, secs_to_com); | |
538 | ||
875d94f3 JG |
539 | bio = bio_alloc(GFP_KERNEL, secs_to_sync); |
540 | ||
541 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
542 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
543 | ||
e2cddf20 | 544 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE); |
875d94f3 JG |
545 | rqd->bio = bio; |
546 | ||
547 | if (pblk_rb_read_to_bio(&pblk->rwb, rqd, pos, secs_to_sync, | |
d624f371 | 548 | secs_avail)) { |
a4bd217b JG |
549 | pr_err("pblk: corrupted write bio\n"); |
550 | goto fail_put_bio; | |
551 | } | |
552 | ||
d624f371 | 553 | if (pblk_submit_io_set(pblk, rqd)) |
a4bd217b | 554 | goto fail_free_bio; |
a4bd217b JG |
555 | |
556 | #ifdef CONFIG_NVM_DEBUG | |
557 | atomic_long_add(secs_to_sync, &pblk->sub_writes); | |
558 | #endif | |
559 | ||
560 | return 0; | |
561 | ||
562 | fail_free_bio: | |
d624f371 | 563 | pblk_free_write_rqd(pblk, rqd); |
a4bd217b JG |
564 | fail_put_bio: |
565 | bio_put(bio); | |
e2cddf20 | 566 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
a4bd217b JG |
567 | |
568 | return 1; | |
569 | } | |
570 | ||
571 | int pblk_write_ts(void *data) | |
572 | { | |
573 | struct pblk *pblk = data; | |
574 | ||
575 | while (!kthread_should_stop()) { | |
576 | if (!pblk_submit_write(pblk)) | |
577 | continue; | |
578 | set_current_state(TASK_INTERRUPTIBLE); | |
579 | io_schedule(); | |
580 | } | |
581 | ||
582 | return 0; | |
583 | } |