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02a1520d | 1 | // SPDX-License-Identifier: GPL-2.0 |
a4bd217b JG |
2 | /* |
3 | * Copyright (C) 2016 CNEX Labs | |
4 | * Initial release: Javier Gonzalez <javier@cnexlabs.com> | |
5 | * Matias Bjorling <matias@cnexlabs.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License version | |
9 | * 2 as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * pblk-write.c - pblk's write path from write buffer to media | |
17 | */ | |
18 | ||
19 | #include "pblk.h" | |
4c44abf4 | 20 | #include "pblk-trace.h" |
a4bd217b | 21 | |
a4bd217b JG |
22 | static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd, |
23 | struct pblk_c_ctx *c_ctx) | |
24 | { | |
a4bd217b | 25 | struct bio *original_bio; |
533657c1 | 26 | struct pblk_rb *rwb = &pblk->rwb; |
a4bd217b JG |
27 | unsigned long ret; |
28 | int i; | |
29 | ||
30 | for (i = 0; i < c_ctx->nr_valid; i++) { | |
31 | struct pblk_w_ctx *w_ctx; | |
533657c1 HH |
32 | int pos = c_ctx->sentry + i; |
33 | int flags; | |
34 | ||
35 | w_ctx = pblk_rb_w_ctx(rwb, pos); | |
36 | flags = READ_ONCE(w_ctx->flags); | |
37 | ||
38 | if (flags & PBLK_FLUSH_ENTRY) { | |
39 | flags &= ~PBLK_FLUSH_ENTRY; | |
40 | /* Release flags on context. Protect from writes */ | |
41 | smp_store_release(&w_ctx->flags, flags); | |
42 | ||
880eda54 | 43 | #ifdef CONFIG_NVM_PBLK_DEBUG |
533657c1 HH |
44 | atomic_dec(&rwb->inflight_flush_point); |
45 | #endif | |
46 | } | |
a4bd217b | 47 | |
a4bd217b JG |
48 | while ((original_bio = bio_list_pop(&w_ctx->bios))) |
49 | bio_endio(original_bio); | |
50 | } | |
51 | ||
cd8ddbf7 JG |
52 | if (c_ctx->nr_padded) |
53 | pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid, | |
54 | c_ctx->nr_padded); | |
55 | ||
880eda54 | 56 | #ifdef CONFIG_NVM_PBLK_DEBUG |
e0e12a70 | 57 | atomic_long_add(rqd->nr_ppas, &pblk->sync_writes); |
a4bd217b JG |
58 | #endif |
59 | ||
60 | ret = pblk_rb_sync_advance(&pblk->rwb, c_ctx->nr_valid); | |
61 | ||
a4bd217b | 62 | bio_put(rqd->bio); |
e2cddf20 | 63 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
a4bd217b JG |
64 | |
65 | return ret; | |
66 | } | |
67 | ||
68 | static unsigned long pblk_end_queued_w_bio(struct pblk *pblk, | |
69 | struct nvm_rq *rqd, | |
70 | struct pblk_c_ctx *c_ctx) | |
71 | { | |
72 | list_del(&c_ctx->list); | |
73 | return pblk_end_w_bio(pblk, rqd, c_ctx); | |
74 | } | |
75 | ||
76 | static void pblk_complete_write(struct pblk *pblk, struct nvm_rq *rqd, | |
77 | struct pblk_c_ctx *c_ctx) | |
78 | { | |
79 | struct pblk_c_ctx *c, *r; | |
80 | unsigned long flags; | |
81 | unsigned long pos; | |
82 | ||
880eda54 | 83 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
84 | atomic_long_sub(c_ctx->nr_valid, &pblk->inflight_writes); |
85 | #endif | |
e99e802f | 86 | pblk_up_rq(pblk, c_ctx->lun_bitmap); |
a4bd217b JG |
87 | |
88 | pos = pblk_rb_sync_init(&pblk->rwb, &flags); | |
89 | if (pos == c_ctx->sentry) { | |
90 | pos = pblk_end_w_bio(pblk, rqd, c_ctx); | |
91 | ||
92 | retry: | |
93 | list_for_each_entry_safe(c, r, &pblk->compl_list, list) { | |
94 | rqd = nvm_rq_from_c_ctx(c); | |
95 | if (c->sentry == pos) { | |
96 | pos = pblk_end_queued_w_bio(pblk, rqd, c); | |
97 | goto retry; | |
98 | } | |
99 | } | |
100 | } else { | |
101 | WARN_ON(nvm_rq_from_c_ctx(c_ctx) != rqd); | |
102 | list_add_tail(&c_ctx->list, &pblk->compl_list); | |
103 | } | |
104 | pblk_rb_sync_end(&pblk->rwb, &flags); | |
105 | } | |
106 | ||
6a3abf5b HH |
107 | /* Map remaining sectors in chunk, starting from ppa */ |
108 | static void pblk_map_remaining(struct pblk *pblk, struct ppa_addr *ppa) | |
a4bd217b | 109 | { |
6a3abf5b HH |
110 | struct pblk_line *line; |
111 | struct ppa_addr map_ppa = *ppa; | |
112 | u64 paddr; | |
113 | int done = 0; | |
a4bd217b | 114 | |
cb21665c | 115 | line = pblk_ppa_to_line(pblk, *ppa); |
6a3abf5b | 116 | spin_lock(&line->lock); |
a4bd217b | 117 | |
6a3abf5b HH |
118 | while (!done) { |
119 | paddr = pblk_dev_ppa_to_line_addr(pblk, map_ppa); | |
2942f50f | 120 | |
6a3abf5b HH |
121 | if (!test_and_set_bit(paddr, line->map_bitmap)) |
122 | line->left_msecs--; | |
a4bd217b | 123 | |
6a3abf5b HH |
124 | if (!test_and_set_bit(paddr, line->invalid_bitmap)) |
125 | le32_add_cpu(line->vsc, -1); | |
a4bd217b | 126 | |
bf82fa2f | 127 | done = nvm_next_ppa_in_chk(pblk->dev, &map_ppa); |
6a3abf5b | 128 | } |
a4bd217b | 129 | |
48b8d208 | 130 | line->w_err_gc->has_write_err = 1; |
6a3abf5b HH |
131 | spin_unlock(&line->lock); |
132 | } | |
133 | ||
134 | static void pblk_prepare_resubmit(struct pblk *pblk, unsigned int sentry, | |
135 | unsigned int nr_entries) | |
136 | { | |
137 | struct pblk_rb *rb = &pblk->rwb; | |
138 | struct pblk_rb_entry *entry; | |
139 | struct pblk_line *line; | |
140 | struct pblk_w_ctx *w_ctx; | |
141 | struct ppa_addr ppa_l2p; | |
142 | int flags; | |
40b8657d | 143 | unsigned int i; |
6a3abf5b HH |
144 | |
145 | spin_lock(&pblk->trans_lock); | |
6a3abf5b | 146 | for (i = 0; i < nr_entries; i++) { |
40b8657d | 147 | entry = &rb->entries[pblk_rb_ptr_wrap(rb, sentry, i)]; |
6a3abf5b HH |
148 | w_ctx = &entry->w_ctx; |
149 | ||
150 | /* Check if the lba has been overwritten */ | |
151 | ppa_l2p = pblk_trans_map_get(pblk, w_ctx->lba); | |
152 | if (!pblk_ppa_comp(ppa_l2p, entry->cacheline)) | |
153 | w_ctx->lba = ADDR_EMPTY; | |
154 | ||
155 | /* Mark up the entry as submittable again */ | |
156 | flags = READ_ONCE(w_ctx->flags); | |
157 | flags |= PBLK_WRITTEN_DATA; | |
158 | /* Release flags on write context. Protect from writes */ | |
159 | smp_store_release(&w_ctx->flags, flags); | |
a4bd217b | 160 | |
2e696f90 | 161 | /* Decrease the reference count to the line as we will |
6a3abf5b | 162 | * re-map these entries |
a4bd217b | 163 | */ |
cb21665c | 164 | line = pblk_ppa_to_line(pblk, w_ctx->ppa); |
6a3abf5b | 165 | kref_put(&line->ref, pblk_line_put); |
a4bd217b | 166 | } |
6a3abf5b HH |
167 | spin_unlock(&pblk->trans_lock); |
168 | } | |
a4bd217b | 169 | |
6a3abf5b HH |
170 | static void pblk_queue_resubmit(struct pblk *pblk, struct pblk_c_ctx *c_ctx) |
171 | { | |
172 | struct pblk_c_ctx *r_ctx; | |
173 | ||
174 | r_ctx = kzalloc(sizeof(struct pblk_c_ctx), GFP_KERNEL); | |
175 | if (!r_ctx) | |
176 | return; | |
177 | ||
178 | r_ctx->lun_bitmap = NULL; | |
179 | r_ctx->sentry = c_ctx->sentry; | |
180 | r_ctx->nr_valid = c_ctx->nr_valid; | |
181 | r_ctx->nr_padded = c_ctx->nr_padded; | |
182 | ||
183 | spin_lock(&pblk->resubmit_lock); | |
184 | list_add_tail(&r_ctx->list, &pblk->resubmit_list); | |
185 | spin_unlock(&pblk->resubmit_lock); | |
186 | ||
880eda54 | 187 | #ifdef CONFIG_NVM_PBLK_DEBUG |
6a3abf5b HH |
188 | atomic_long_add(c_ctx->nr_valid, &pblk->recov_writes); |
189 | #endif | |
190 | } | |
191 | ||
192 | static void pblk_submit_rec(struct work_struct *work) | |
193 | { | |
194 | struct pblk_rec_ctx *recovery = | |
195 | container_of(work, struct pblk_rec_ctx, ws_rec); | |
196 | struct pblk *pblk = recovery->pblk; | |
197 | struct nvm_rq *rqd = recovery->rqd; | |
198 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
d68a9344 | 199 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
6a3abf5b HH |
200 | |
201 | pblk_log_write_err(pblk, rqd); | |
202 | ||
6a3abf5b HH |
203 | pblk_map_remaining(pblk, ppa_list); |
204 | pblk_queue_resubmit(pblk, c_ctx); | |
205 | ||
e99e802f | 206 | pblk_up_rq(pblk, c_ctx->lun_bitmap); |
6a3abf5b HH |
207 | if (c_ctx->nr_padded) |
208 | pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid, | |
209 | c_ctx->nr_padded); | |
210 | bio_put(rqd->bio); | |
211 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); | |
212 | mempool_free(recovery, &pblk->rec_pool); | |
213 | ||
214 | atomic_dec(&pblk->inflight_io); | |
215 | } | |
216 | ||
217 | ||
218 | static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd) | |
219 | { | |
220 | struct pblk_rec_ctx *recovery; | |
221 | ||
222 | recovery = mempool_alloc(&pblk->rec_pool, GFP_ATOMIC); | |
223 | if (!recovery) { | |
4e495a46 | 224 | pblk_err(pblk, "could not allocate recovery work\n"); |
6a3abf5b | 225 | return; |
a4bd217b JG |
226 | } |
227 | ||
6a3abf5b HH |
228 | recovery->pblk = pblk; |
229 | recovery->rqd = rqd; | |
230 | ||
a4bd217b | 231 | INIT_WORK(&recovery->ws_rec, pblk_submit_rec); |
ef576494 | 232 | queue_work(pblk->close_wq, &recovery->ws_rec); |
a4bd217b JG |
233 | } |
234 | ||
235 | static void pblk_end_io_write(struct nvm_rq *rqd) | |
236 | { | |
237 | struct pblk *pblk = rqd->private; | |
238 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
239 | ||
240 | if (rqd->error) { | |
6a3abf5b HH |
241 | pblk_end_w_fail(pblk, rqd); |
242 | return; | |
4c44abf4 HH |
243 | } else { |
244 | if (trace_pblk_chunk_state_enabled()) | |
245 | pblk_check_chunk_state_update(pblk, rqd); | |
880eda54 | 246 | #ifdef CONFIG_NVM_PBLK_DEBUG |
4e4cbee9 | 247 | WARN_ONCE(rqd->bio->bi_status, "pblk: corrupted write error\n"); |
a4bd217b | 248 | #endif |
4c44abf4 | 249 | } |
a4bd217b JG |
250 | |
251 | pblk_complete_write(pblk, rqd, c_ctx); | |
588726d3 | 252 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
253 | } |
254 | ||
dd2a4343 JG |
255 | static void pblk_end_io_write_meta(struct nvm_rq *rqd) |
256 | { | |
257 | struct pblk *pblk = rqd->private; | |
dd2a4343 JG |
258 | struct pblk_g_ctx *m_ctx = nvm_rq_to_pdu(rqd); |
259 | struct pblk_line *line = m_ctx->private; | |
260 | struct pblk_emeta *emeta = line->emeta; | |
d68a9344 | 261 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
dd2a4343 JG |
262 | int sync; |
263 | ||
43241cfe | 264 | pblk_up_chunk(pblk, ppa_list[0]); |
dd2a4343 JG |
265 | |
266 | if (rqd->error) { | |
267 | pblk_log_write_err(pblk, rqd); | |
4e495a46 | 268 | pblk_err(pblk, "metadata I/O failed. Line %d\n", line->id); |
48b8d208 | 269 | line->w_err_gc->has_write_err = 1; |
4c44abf4 HH |
270 | } else { |
271 | if (trace_pblk_chunk_state_enabled()) | |
272 | pblk_check_chunk_state_update(pblk, rqd); | |
dd2a4343 | 273 | } |
dd2a4343 JG |
274 | |
275 | sync = atomic_add_return(rqd->nr_ppas, &emeta->sync); | |
276 | if (sync == emeta->nr_entries) | |
b84ae4a8 JG |
277 | pblk_gen_run_ws(pblk, line, NULL, pblk_line_close_ws, |
278 | GFP_ATOMIC, pblk->close_wq); | |
dd2a4343 | 279 | |
e2cddf20 | 280 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
588726d3 JG |
281 | |
282 | atomic_dec(&pblk->inflight_io); | |
dd2a4343 JG |
283 | } |
284 | ||
a4bd217b | 285 | static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd, |
45dcf29b | 286 | unsigned int nr_secs, nvm_end_io_fn(*end_io)) |
a4bd217b | 287 | { |
a4bd217b JG |
288 | /* Setup write request */ |
289 | rqd->opcode = NVM_OP_PWRITE; | |
290 | rqd->nr_ppas = nr_secs; | |
d7b68016 | 291 | rqd->is_seq = 1; |
a4bd217b | 292 | rqd->private = pblk; |
dd2a4343 | 293 | rqd->end_io = end_io; |
a4bd217b | 294 | |
45dcf29b | 295 | return pblk_alloc_rqd_meta(pblk, rqd); |
a4bd217b JG |
296 | } |
297 | ||
298 | static int pblk_setup_w_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
1e82123d | 299 | struct ppa_addr *erase_ppa) |
a4bd217b JG |
300 | { |
301 | struct pblk_line_meta *lm = &pblk->lm; | |
d624f371 | 302 | struct pblk_line *e_line = pblk_line_get_erase(pblk); |
1e82123d | 303 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); |
a4bd217b JG |
304 | unsigned int valid = c_ctx->nr_valid; |
305 | unsigned int padded = c_ctx->nr_padded; | |
306 | unsigned int nr_secs = valid + padded; | |
307 | unsigned long *lun_bitmap; | |
1e82123d | 308 | int ret; |
a4bd217b JG |
309 | |
310 | lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL); | |
d624f371 JG |
311 | if (!lun_bitmap) |
312 | return -ENOMEM; | |
a4bd217b JG |
313 | c_ctx->lun_bitmap = lun_bitmap; |
314 | ||
dd2a4343 | 315 | ret = pblk_alloc_w_rq(pblk, rqd, nr_secs, pblk_end_io_write); |
a4bd217b JG |
316 | if (ret) { |
317 | kfree(lun_bitmap); | |
d624f371 | 318 | return ret; |
a4bd217b JG |
319 | } |
320 | ||
588726d3 | 321 | if (likely(!e_line || !atomic_read(&e_line->left_eblks))) |
a4bd217b JG |
322 | pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, valid, 0); |
323 | else | |
324 | pblk_map_erase_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, | |
d624f371 | 325 | valid, erase_ppa); |
a4bd217b | 326 | |
d624f371 | 327 | return 0; |
a4bd217b JG |
328 | } |
329 | ||
a4bd217b JG |
330 | static int pblk_calc_secs_to_sync(struct pblk *pblk, unsigned int secs_avail, |
331 | unsigned int secs_to_flush) | |
332 | { | |
333 | int secs_to_sync; | |
334 | ||
335 | secs_to_sync = pblk_calc_secs(pblk, secs_avail, secs_to_flush); | |
336 | ||
880eda54 | 337 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
338 | if ((!secs_to_sync && secs_to_flush) |
339 | || (secs_to_sync < 0) | |
340 | || (secs_to_sync > secs_avail && !secs_to_flush)) { | |
4e495a46 | 341 | pblk_err(pblk, "bad sector calculation (a:%d,s:%d,f:%d)\n", |
a4bd217b JG |
342 | secs_avail, secs_to_sync, secs_to_flush); |
343 | } | |
344 | #endif | |
345 | ||
346 | return secs_to_sync; | |
347 | } | |
348 | ||
dd2a4343 JG |
349 | int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line) |
350 | { | |
351 | struct nvm_tgt_dev *dev = pblk->dev; | |
352 | struct nvm_geo *geo = &dev->geo; | |
353 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
354 | struct pblk_line_meta *lm = &pblk->lm; | |
355 | struct pblk_emeta *emeta = meta_line->emeta; | |
d68a9344 | 356 | struct ppa_addr *ppa_list; |
dd2a4343 | 357 | struct pblk_g_ctx *m_ctx; |
dd2a4343 JG |
358 | struct bio *bio; |
359 | struct nvm_rq *rqd; | |
360 | void *data; | |
361 | u64 paddr; | |
362 | int rq_ppas = pblk->min_write_pgs; | |
363 | int id = meta_line->id; | |
364 | int rq_len; | |
365 | int i, j; | |
366 | int ret; | |
367 | ||
e2cddf20 | 368 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT); |
2942f50f | 369 | |
dd2a4343 JG |
370 | m_ctx = nvm_rq_to_pdu(rqd); |
371 | m_ctx->private = meta_line; | |
372 | ||
e46f4e48 | 373 | rq_len = rq_ppas * geo->csecs; |
dd2a4343 JG |
374 | data = ((void *)emeta->buf) + emeta->mem; |
375 | ||
de54e703 JG |
376 | bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len, |
377 | l_mg->emeta_alloc_type, GFP_KERNEL); | |
dd2a4343 | 378 | if (IS_ERR(bio)) { |
4e495a46 | 379 | pblk_err(pblk, "failed to map emeta io"); |
dd2a4343 JG |
380 | ret = PTR_ERR(bio); |
381 | goto fail_free_rqd; | |
382 | } | |
383 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
384 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
385 | rqd->bio = bio; | |
386 | ||
387 | ret = pblk_alloc_w_rq(pblk, rqd, rq_ppas, pblk_end_io_write_meta); | |
388 | if (ret) | |
389 | goto fail_free_bio; | |
390 | ||
d68a9344 | 391 | ppa_list = nvm_rq_to_ppa_list(rqd); |
dd2a4343 JG |
392 | for (i = 0; i < rqd->nr_ppas; ) { |
393 | spin_lock(&meta_line->lock); | |
394 | paddr = __pblk_alloc_page(pblk, meta_line, rq_ppas); | |
395 | spin_unlock(&meta_line->lock); | |
396 | for (j = 0; j < rq_ppas; j++, i++, paddr++) | |
d68a9344 | 397 | ppa_list[i] = addr_to_gen_ppa(pblk, paddr, id); |
dd2a4343 JG |
398 | } |
399 | ||
d8adaa3b | 400 | spin_lock(&l_mg->close_lock); |
dd2a4343 | 401 | emeta->mem += rq_len; |
d8adaa3b | 402 | if (emeta->mem >= lm->emeta_len[0]) |
dd2a4343 | 403 | list_del(&meta_line->list); |
d8adaa3b | 404 | spin_unlock(&l_mg->close_lock); |
dd2a4343 | 405 | |
43241cfe | 406 | pblk_down_chunk(pblk, ppa_list[0]); |
3eaa11e2 | 407 | |
dd2a4343 JG |
408 | ret = pblk_submit_io(pblk, rqd); |
409 | if (ret) { | |
4e495a46 | 410 | pblk_err(pblk, "emeta I/O submission failed: %d\n", ret); |
dd2a4343 JG |
411 | goto fail_rollback; |
412 | } | |
413 | ||
414 | return NVM_IO_OK; | |
415 | ||
416 | fail_rollback: | |
43241cfe | 417 | pblk_up_chunk(pblk, ppa_list[0]); |
dd2a4343 JG |
418 | spin_lock(&l_mg->close_lock); |
419 | pblk_dealloc_page(pblk, meta_line, rq_ppas); | |
420 | list_add(&meta_line->list, &meta_line->list); | |
421 | spin_unlock(&l_mg->close_lock); | |
422 | fail_free_bio: | |
55e836d4 | 423 | bio_put(bio); |
dd2a4343 | 424 | fail_free_rqd: |
e2cddf20 | 425 | pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT); |
dd2a4343 JG |
426 | return ret; |
427 | } | |
428 | ||
1e82123d JG |
429 | static inline bool pblk_valid_meta_ppa(struct pblk *pblk, |
430 | struct pblk_line *meta_line, | |
431 | struct nvm_rq *data_rqd) | |
432 | { | |
433 | struct nvm_tgt_dev *dev = pblk->dev; | |
434 | struct nvm_geo *geo = &dev->geo; | |
435 | struct pblk_c_ctx *data_c_ctx = nvm_rq_to_pdu(data_rqd); | |
436 | struct pblk_line *data_line = pblk_line_get_data(pblk); | |
437 | struct ppa_addr ppa, ppa_opt; | |
438 | u64 paddr; | |
439 | int pos_opt; | |
440 | ||
441 | /* Schedule a metadata I/O that is half the distance from the data I/O | |
442 | * with regards to the number of LUNs forming the pblk instance. This | |
443 | * balances LUN conflicts across every I/O. | |
444 | * | |
445 | * When the LUN configuration changes (e.g., due to GC), this distance | |
446 | * can align, which would result on metadata and data I/Os colliding. In | |
447 | * this case, modify the distance to not be optimal, but move the | |
448 | * optimal in the right direction. | |
449 | */ | |
450 | paddr = pblk_lookup_page(pblk, meta_line); | |
451 | ppa = addr_to_gen_ppa(pblk, paddr, 0); | |
452 | ppa_opt = addr_to_gen_ppa(pblk, paddr + data_line->meta_distance, 0); | |
453 | pos_opt = pblk_ppa_to_pos(geo, ppa_opt); | |
454 | ||
455 | if (test_bit(pos_opt, data_c_ctx->lun_bitmap) || | |
456 | test_bit(pos_opt, data_line->blk_bitmap)) | |
457 | return true; | |
458 | ||
459 | if (unlikely(pblk_ppa_comp(ppa_opt, ppa))) | |
460 | data_line->meta_distance--; | |
461 | ||
462 | return false; | |
463 | } | |
464 | ||
465 | static struct pblk_line *pblk_should_submit_meta_io(struct pblk *pblk, | |
466 | struct nvm_rq *data_rqd) | |
dd2a4343 JG |
467 | { |
468 | struct pblk_line_meta *lm = &pblk->lm; | |
469 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
470 | struct pblk_line *meta_line; | |
471 | ||
472 | spin_lock(&l_mg->close_lock); | |
dd2a4343 JG |
473 | if (list_empty(&l_mg->emeta_list)) { |
474 | spin_unlock(&l_mg->close_lock); | |
1e82123d | 475 | return NULL; |
dd2a4343 JG |
476 | } |
477 | meta_line = list_first_entry(&l_mg->emeta_list, struct pblk_line, list); | |
d8adaa3b JG |
478 | if (meta_line->emeta->mem >= lm->emeta_len[0]) { |
479 | spin_unlock(&l_mg->close_lock); | |
480 | return NULL; | |
481 | } | |
dd2a4343 JG |
482 | spin_unlock(&l_mg->close_lock); |
483 | ||
1e82123d JG |
484 | if (!pblk_valid_meta_ppa(pblk, meta_line, data_rqd)) |
485 | return NULL; | |
dd2a4343 | 486 | |
1e82123d | 487 | return meta_line; |
dd2a4343 JG |
488 | } |
489 | ||
d624f371 JG |
490 | static int pblk_submit_io_set(struct pblk *pblk, struct nvm_rq *rqd) |
491 | { | |
d624f371 | 492 | struct ppa_addr erase_ppa; |
1e82123d | 493 | struct pblk_line *meta_line; |
d624f371 JG |
494 | int err; |
495 | ||
26f76dce | 496 | pblk_ppa_set_empty(&erase_ppa); |
d624f371 JG |
497 | |
498 | /* Assign lbas to ppas and populate request structure */ | |
1e82123d | 499 | err = pblk_setup_w_rq(pblk, rqd, &erase_ppa); |
d624f371 | 500 | if (err) { |
4e495a46 | 501 | pblk_err(pblk, "could not setup write request: %d\n", err); |
d624f371 JG |
502 | return NVM_IO_ERR; |
503 | } | |
504 | ||
1e82123d | 505 | meta_line = pblk_should_submit_meta_io(pblk, rqd); |
dd2a4343 | 506 | |
1e82123d JG |
507 | /* Submit data write for current data line */ |
508 | err = pblk_submit_io(pblk, rqd); | |
509 | if (err) { | |
4e495a46 | 510 | pblk_err(pblk, "data I/O submission failed: %d\n", err); |
1e82123d JG |
511 | return NVM_IO_ERR; |
512 | } | |
d624f371 | 513 | |
26f76dce | 514 | if (!pblk_ppa_empty(erase_ppa)) { |
1e82123d | 515 | /* Submit erase for next data line */ |
dd2a4343 JG |
516 | if (pblk_blk_erase_async(pblk, erase_ppa)) { |
517 | struct pblk_line *e_line = pblk_line_get_erase(pblk); | |
518 | struct nvm_tgt_dev *dev = pblk->dev; | |
519 | struct nvm_geo *geo = &dev->geo; | |
520 | int bit; | |
521 | ||
522 | atomic_inc(&e_line->left_eblks); | |
523 | bit = pblk_ppa_to_pos(geo, erase_ppa); | |
524 | WARN_ON(!test_and_clear_bit(bit, e_line->erase_bitmap)); | |
525 | } | |
d624f371 JG |
526 | } |
527 | ||
1e82123d JG |
528 | if (meta_line) { |
529 | /* Submit metadata write for previous data line */ | |
530 | err = pblk_submit_meta_io(pblk, meta_line); | |
531 | if (err) { | |
4e495a46 MB |
532 | pblk_err(pblk, "metadata I/O submission failed: %d", |
533 | err); | |
1e82123d JG |
534 | return NVM_IO_ERR; |
535 | } | |
536 | } | |
537 | ||
d624f371 JG |
538 | return NVM_IO_OK; |
539 | } | |
540 | ||
541 | static void pblk_free_write_rqd(struct pblk *pblk, struct nvm_rq *rqd) | |
542 | { | |
543 | struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd); | |
544 | struct bio *bio = rqd->bio; | |
545 | ||
546 | if (c_ctx->nr_padded) | |
cd8ddbf7 JG |
547 | pblk_bio_free_pages(pblk, bio, c_ctx->nr_valid, |
548 | c_ctx->nr_padded); | |
d624f371 JG |
549 | } |
550 | ||
a4bd217b JG |
551 | static int pblk_submit_write(struct pblk *pblk) |
552 | { | |
553 | struct bio *bio; | |
554 | struct nvm_rq *rqd; | |
a4bd217b JG |
555 | unsigned int secs_avail, secs_to_sync, secs_to_com; |
556 | unsigned int secs_to_flush; | |
557 | unsigned long pos; | |
6a3abf5b | 558 | unsigned int resubmit; |
a4bd217b | 559 | |
6a3abf5b HH |
560 | spin_lock(&pblk->resubmit_lock); |
561 | resubmit = !list_empty(&pblk->resubmit_list); | |
562 | spin_unlock(&pblk->resubmit_lock); | |
563 | ||
564 | /* Resubmit failed writes first */ | |
565 | if (resubmit) { | |
566 | struct pblk_c_ctx *r_ctx; | |
567 | ||
568 | spin_lock(&pblk->resubmit_lock); | |
569 | r_ctx = list_first_entry(&pblk->resubmit_list, | |
570 | struct pblk_c_ctx, list); | |
571 | list_del(&r_ctx->list); | |
572 | spin_unlock(&pblk->resubmit_lock); | |
573 | ||
574 | secs_avail = r_ctx->nr_valid; | |
575 | pos = r_ctx->sentry; | |
576 | ||
577 | pblk_prepare_resubmit(pblk, pos, secs_avail); | |
578 | secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, | |
579 | secs_avail); | |
a4bd217b | 580 | |
6a3abf5b HH |
581 | kfree(r_ctx); |
582 | } else { | |
583 | /* If there are no sectors in the cache, | |
584 | * flushes (bios without data) will be cleared on | |
585 | * the cache threads | |
586 | */ | |
587 | secs_avail = pblk_rb_read_count(&pblk->rwb); | |
588 | if (!secs_avail) | |
589 | return 1; | |
590 | ||
591 | secs_to_flush = pblk_rb_flush_point_count(&pblk->rwb); | |
592 | if (!secs_to_flush && secs_avail < pblk->min_write_pgs) | |
593 | return 1; | |
594 | ||
595 | secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, | |
596 | secs_to_flush); | |
597 | if (secs_to_sync > pblk->max_write_pgs) { | |
4e495a46 | 598 | pblk_err(pblk, "bad buffer sync calculation\n"); |
6a3abf5b HH |
599 | return 1; |
600 | } | |
601 | ||
602 | secs_to_com = (secs_to_sync > secs_avail) ? | |
603 | secs_avail : secs_to_sync; | |
604 | pos = pblk_rb_read_commit(&pblk->rwb, secs_to_com); | |
605 | } | |
a4bd217b | 606 | |
875d94f3 JG |
607 | bio = bio_alloc(GFP_KERNEL, secs_to_sync); |
608 | ||
609 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
610 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); | |
611 | ||
e2cddf20 | 612 | rqd = pblk_alloc_rqd(pblk, PBLK_WRITE); |
875d94f3 JG |
613 | rqd->bio = bio; |
614 | ||
615 | if (pblk_rb_read_to_bio(&pblk->rwb, rqd, pos, secs_to_sync, | |
d624f371 | 616 | secs_avail)) { |
4e495a46 | 617 | pblk_err(pblk, "corrupted write bio\n"); |
a4bd217b JG |
618 | goto fail_put_bio; |
619 | } | |
620 | ||
d624f371 | 621 | if (pblk_submit_io_set(pblk, rqd)) |
a4bd217b | 622 | goto fail_free_bio; |
a4bd217b | 623 | |
880eda54 | 624 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
625 | atomic_long_add(secs_to_sync, &pblk->sub_writes); |
626 | #endif | |
627 | ||
628 | return 0; | |
629 | ||
630 | fail_free_bio: | |
d624f371 | 631 | pblk_free_write_rqd(pblk, rqd); |
a4bd217b JG |
632 | fail_put_bio: |
633 | bio_put(bio); | |
e2cddf20 | 634 | pblk_free_rqd(pblk, rqd, PBLK_WRITE); |
a4bd217b JG |
635 | |
636 | return 1; | |
637 | } | |
638 | ||
639 | int pblk_write_ts(void *data) | |
640 | { | |
641 | struct pblk *pblk = data; | |
642 | ||
643 | while (!kthread_should_stop()) { | |
644 | if (!pblk_submit_write(pblk)) | |
645 | continue; | |
646 | set_current_state(TASK_INTERRUPTIBLE); | |
647 | io_schedule(); | |
648 | } | |
649 | ||
650 | return 0; | |
651 | } |