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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-read.c - pblk's read path | |
17 | */ | |
18 | ||
19 | #include "pblk.h" | |
20 | ||
21 | /* | |
22 | * There is no guarantee that the value read from cache has not been updated and | |
23 | * resides at another location in the cache. We guarantee though that if the | |
24 | * value is read from the cache, it belongs to the mapped lba. In order to | |
25 | * guarantee and order between writes and reads are ordered, a flush must be | |
26 | * issued. | |
27 | */ | |
28 | static int pblk_read_from_cache(struct pblk *pblk, struct bio *bio, | |
a96de64a | 29 | sector_t lba, struct ppa_addr ppa) |
a4bd217b | 30 | { |
880eda54 | 31 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
32 | /* Callers must ensure that the ppa points to a cache address */ |
33 | BUG_ON(pblk_ppa_empty(ppa)); | |
34 | BUG_ON(!pblk_addr_in_cache(ppa)); | |
35 | #endif | |
36 | ||
a96de64a | 37 | return pblk_rb_copy_to_bio(&pblk->rwb, bio, lba, ppa); |
a4bd217b JG |
38 | } |
39 | ||
a96de64a | 40 | static int pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd, |
87cc40bb | 41 | struct bio *bio, sector_t blba, |
a96de64a | 42 | bool *from_cache) |
a4bd217b | 43 | { |
faa79f27 | 44 | void *meta_list = rqd->meta_list; |
a96de64a | 45 | int nr_secs, i; |
a4bd217b | 46 | |
a96de64a IK |
47 | retry: |
48 | nr_secs = pblk_lookup_l2p_seq(pblk, rqd->ppa_list, blba, rqd->nr_ppas, | |
49 | from_cache); | |
50 | ||
51 | if (!*from_cache) | |
52 | goto end; | |
a4bd217b JG |
53 | |
54 | for (i = 0; i < nr_secs; i++) { | |
faa79f27 | 55 | struct pblk_sec_meta *meta = pblk_get_meta(pblk, meta_list, i); |
a4bd217b JG |
56 | sector_t lba = blba + i; |
57 | ||
a96de64a | 58 | if (pblk_ppa_empty(rqd->ppa_list[i])) { |
faa79f27 IK |
59 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
60 | ||
faa79f27 | 61 | meta->lba = addr_empty; |
a96de64a IK |
62 | } else if (pblk_addr_in_cache(rqd->ppa_list[i])) { |
63 | /* | |
64 | * Try to read from write buffer. The address is later | |
65 | * checked on the write buffer to prevent retrieving | |
66 | * overwritten data. | |
67 | */ | |
68 | if (!pblk_read_from_cache(pblk, bio, lba, | |
69 | rqd->ppa_list[i])) { | |
70 | if (i == 0) { | |
71 | /* | |
72 | * We didn't call with bio_advance() | |
73 | * yet, so we can just retry. | |
74 | */ | |
75 | goto retry; | |
76 | } else { | |
77 | /* | |
78 | * We already call bio_advance() | |
79 | * so we cannot retry and we need | |
80 | * to quit that function in order | |
81 | * to allow caller to handle the bio | |
82 | * splitting in the current sector | |
83 | * position. | |
84 | */ | |
85 | nr_secs = i; | |
86 | goto end; | |
87 | } | |
75cb8e93 | 88 | } |
faa79f27 | 89 | meta->lba = cpu_to_le64(lba); |
880eda54 | 90 | #ifdef CONFIG_NVM_PBLK_DEBUG |
db7ada33 JG |
91 | atomic_long_inc(&pblk->cache_reads); |
92 | #endif | |
a4bd217b | 93 | } |
a96de64a | 94 | bio_advance(bio, PBLK_EXPOSED_PAGE_SIZE); |
a4bd217b JG |
95 | } |
96 | ||
a96de64a | 97 | end: |
f9c10152 | 98 | if (pblk_io_aligned(pblk, nr_secs)) |
d7b68016 | 99 | rqd->is_seq = 1; |
f9c10152 | 100 | |
880eda54 | 101 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
102 | atomic_long_add(nr_secs, &pblk->inflight_reads); |
103 | #endif | |
a96de64a IK |
104 | |
105 | return nr_secs; | |
a4bd217b JG |
106 | } |
107 | ||
a4bd217b | 108 | |
03a34b2d JG |
109 | static void pblk_read_check_seq(struct pblk *pblk, struct nvm_rq *rqd, |
110 | sector_t blba) | |
a4809fee | 111 | { |
faa79f27 | 112 | void *meta_list = rqd->meta_list; |
03a34b2d | 113 | int nr_lbas = rqd->nr_ppas; |
a4809fee JG |
114 | int i; |
115 | ||
55d8ec35 IK |
116 | if (!pblk_is_oob_meta_supported(pblk)) |
117 | return; | |
118 | ||
a4809fee | 119 | for (i = 0; i < nr_lbas; i++) { |
faa79f27 IK |
120 | struct pblk_sec_meta *meta = pblk_get_meta(pblk, meta_list, i); |
121 | u64 lba = le64_to_cpu(meta->lba); | |
a4809fee JG |
122 | |
123 | if (lba == ADDR_EMPTY) | |
124 | continue; | |
125 | ||
03a34b2d | 126 | if (lba != blba + i) { |
880eda54 | 127 | #ifdef CONFIG_NVM_PBLK_DEBUG |
d68a9344 | 128 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
03a34b2d | 129 | |
d68a9344 | 130 | print_ppa(pblk, &ppa_list[i], "seq", i); |
03a34b2d | 131 | #endif |
4e495a46 | 132 | pblk_err(pblk, "corrupted read LBA (%llu/%llu)\n", |
03a34b2d JG |
133 | lba, (u64)blba + i); |
134 | WARN_ON(1); | |
135 | } | |
a4809fee JG |
136 | } |
137 | } | |
138 | ||
310df582 JG |
139 | /* |
140 | * There can be holes in the lba list. | |
141 | */ | |
03a34b2d JG |
142 | static void pblk_read_check_rand(struct pblk *pblk, struct nvm_rq *rqd, |
143 | u64 *lba_list, int nr_lbas) | |
310df582 | 144 | { |
faa79f27 | 145 | void *meta_lba_list = rqd->meta_list; |
310df582 JG |
146 | int i, j; |
147 | ||
55d8ec35 IK |
148 | if (!pblk_is_oob_meta_supported(pblk)) |
149 | return; | |
150 | ||
310df582 | 151 | for (i = 0, j = 0; i < nr_lbas; i++) { |
faa79f27 IK |
152 | struct pblk_sec_meta *meta = pblk_get_meta(pblk, |
153 | meta_lba_list, j); | |
310df582 JG |
154 | u64 lba = lba_list[i]; |
155 | u64 meta_lba; | |
156 | ||
157 | if (lba == ADDR_EMPTY) | |
158 | continue; | |
159 | ||
faa79f27 | 160 | meta_lba = le64_to_cpu(meta->lba); |
310df582 JG |
161 | |
162 | if (lba != meta_lba) { | |
880eda54 | 163 | #ifdef CONFIG_NVM_PBLK_DEBUG |
d68a9344 | 164 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
03a34b2d | 165 | |
ea1d24bc | 166 | print_ppa(pblk, &ppa_list[j], "rnd", j); |
03a34b2d | 167 | #endif |
4e495a46 | 168 | pblk_err(pblk, "corrupted read LBA (%llu/%llu)\n", |
ea1d24bc | 169 | meta_lba, lba); |
310df582 JG |
170 | WARN_ON(1); |
171 | } | |
03a34b2d JG |
172 | |
173 | j++; | |
310df582 | 174 | } |
03a34b2d JG |
175 | |
176 | WARN_ONCE(j != rqd->nr_ppas, "pblk: corrupted random request\n"); | |
310df582 JG |
177 | } |
178 | ||
d38954ed | 179 | static void pblk_end_user_read(struct bio *bio, int error) |
7bd4d370 | 180 | { |
d38954ed IK |
181 | if (error && error != NVM_RSP_WARN_HIGHECC) |
182 | bio_io_error(bio); | |
3e03f632 IK |
183 | else |
184 | bio_endio(bio); | |
7bd4d370 JG |
185 | } |
186 | ||
187 | static void __pblk_end_io_read(struct pblk *pblk, struct nvm_rq *rqd, | |
188 | bool put_line) | |
a4bd217b | 189 | { |
998ba629 | 190 | struct nvm_tgt_dev *dev = pblk->dev; |
084ec9ba | 191 | struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd); |
87cc40bb | 192 | struct bio *int_bio = rqd->bio; |
998ba629 JG |
193 | unsigned long start_time = r_ctx->start_time; |
194 | ||
ddcf35d3 | 195 | generic_end_io_acct(dev->q, REQ_OP_READ, &pblk->disk->part0, start_time); |
a4bd217b JG |
196 | |
197 | if (rqd->error) | |
198 | pblk_log_read_err(pblk, rqd); | |
a4bd217b | 199 | |
03a34b2d | 200 | pblk_read_check_seq(pblk, rqd, r_ctx->lba); |
a96de64a | 201 | bio_put(int_bio); |
084ec9ba | 202 | |
7bd4d370 | 203 | if (put_line) |
ae14cc04 | 204 | pblk_rq_to_line_put(pblk, rqd); |
a4bd217b | 205 | |
880eda54 | 206 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
207 | atomic_long_add(rqd->nr_ppas, &pblk->sync_reads); |
208 | atomic_long_sub(rqd->nr_ppas, &pblk->inflight_reads); | |
209 | #endif | |
210 | ||
e2cddf20 | 211 | pblk_free_rqd(pblk, rqd, PBLK_READ); |
588726d3 | 212 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
213 | } |
214 | ||
7bd4d370 JG |
215 | static void pblk_end_io_read(struct nvm_rq *rqd) |
216 | { | |
217 | struct pblk *pblk = rqd->private; | |
87cc40bb JG |
218 | struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd); |
219 | struct bio *bio = (struct bio *)r_ctx->private; | |
7bd4d370 | 220 | |
d38954ed | 221 | pblk_end_user_read(bio, rqd->error); |
7bd4d370 JG |
222 | __pblk_end_io_read(pblk, rqd, true); |
223 | } | |
224 | ||
87cc40bb | 225 | static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd, struct bio *bio, |
a96de64a | 226 | sector_t lba, bool *from_cache) |
a4bd217b | 227 | { |
faa79f27 | 228 | struct pblk_sec_meta *meta = pblk_get_meta(pblk, rqd->meta_list, 0); |
a4bd217b | 229 | struct ppa_addr ppa; |
a4bd217b | 230 | |
a96de64a | 231 | pblk_lookup_l2p_seq(pblk, &ppa, lba, 1, from_cache); |
a4bd217b | 232 | |
880eda54 | 233 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
234 | atomic_long_inc(&pblk->inflight_reads); |
235 | #endif | |
236 | ||
237 | retry: | |
238 | if (pblk_ppa_empty(ppa)) { | |
faa79f27 IK |
239 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); |
240 | ||
faa79f27 | 241 | meta->lba = addr_empty; |
a4bd217b JG |
242 | return; |
243 | } | |
244 | ||
245 | /* Try to read from write buffer. The address is later checked on the | |
246 | * write buffer to prevent retrieving overwritten data. | |
247 | */ | |
248 | if (pblk_addr_in_cache(ppa)) { | |
a96de64a IK |
249 | if (!pblk_read_from_cache(pblk, bio, lba, ppa)) { |
250 | pblk_lookup_l2p_seq(pblk, &ppa, lba, 1, from_cache); | |
a4bd217b JG |
251 | goto retry; |
252 | } | |
a4809fee | 253 | |
faa79f27 | 254 | meta->lba = cpu_to_le64(lba); |
a4809fee | 255 | |
880eda54 | 256 | #ifdef CONFIG_NVM_PBLK_DEBUG |
7bd4d370 | 257 | atomic_long_inc(&pblk->cache_reads); |
db7ada33 | 258 | #endif |
a4bd217b JG |
259 | } else { |
260 | rqd->ppa_addr = ppa; | |
261 | } | |
262 | } | |
263 | ||
3e03f632 | 264 | void pblk_submit_read(struct pblk *pblk, struct bio *bio) |
a4bd217b JG |
265 | { |
266 | struct nvm_tgt_dev *dev = pblk->dev; | |
998ba629 | 267 | struct request_queue *q = dev->q; |
84454e6d | 268 | sector_t blba = pblk_get_lba(bio); |
5bf1e1ee | 269 | unsigned int nr_secs = pblk_get_secs(bio); |
a96de64a | 270 | bool from_cache; |
a4809fee | 271 | struct pblk_g_ctx *r_ctx; |
a4bd217b | 272 | struct nvm_rq *rqd; |
a96de64a | 273 | struct bio *int_bio, *split_bio; |
a4bd217b | 274 | |
ddcf35d3 MC |
275 | generic_start_io_acct(q, REQ_OP_READ, bio_sectors(bio), |
276 | &pblk->disk->part0); | |
998ba629 | 277 | |
e2cddf20 | 278 | rqd = pblk_alloc_rqd(pblk, PBLK_READ); |
a4bd217b JG |
279 | |
280 | rqd->opcode = NVM_OP_PREAD; | |
a4bd217b JG |
281 | rqd->nr_ppas = nr_secs; |
282 | rqd->private = pblk; | |
283 | rqd->end_io = pblk_end_io_read; | |
284 | ||
a4809fee | 285 | r_ctx = nvm_rq_to_pdu(rqd); |
998ba629 | 286 | r_ctx->start_time = jiffies; |
a4809fee JG |
287 | r_ctx->lba = blba; |
288 | ||
3e03f632 IK |
289 | if (pblk_alloc_rqd_meta(pblk, rqd)) { |
290 | bio_io_error(bio); | |
291 | pblk_free_rqd(pblk, rqd, PBLK_READ); | |
292 | return; | |
293 | } | |
294 | ||
295 | /* Clone read bio to deal internally with: | |
296 | * -read errors when reading from drive | |
a96de64a | 297 | * -bio_advance() calls during cache reads |
3e03f632 IK |
298 | */ |
299 | int_bio = bio_clone_fast(bio, GFP_KERNEL, &pblk_bio_set); | |
a4bd217b | 300 | |
45dcf29b | 301 | if (nr_secs > 1) |
a96de64a IK |
302 | nr_secs = pblk_read_ppalist_rq(pblk, rqd, int_bio, blba, |
303 | &from_cache); | |
45dcf29b | 304 | else |
a96de64a | 305 | pblk_read_rq(pblk, rqd, int_bio, blba, &from_cache); |
a4bd217b | 306 | |
a96de64a | 307 | split_retry: |
3e03f632 IK |
308 | r_ctx->private = bio; /* original bio */ |
309 | rqd->bio = int_bio; /* internal bio */ | |
310 | ||
a96de64a IK |
311 | if (from_cache && nr_secs == rqd->nr_ppas) { |
312 | /* All data was read from cache, we can complete the IO. */ | |
3e03f632 | 313 | pblk_end_user_read(bio, 0); |
588726d3 | 314 | atomic_inc(&pblk->inflight_io); |
7bd4d370 | 315 | __pblk_end_io_read(pblk, rqd, false); |
a96de64a | 316 | } else if (nr_secs != rqd->nr_ppas) { |
3e03f632 IK |
317 | /* The read bio request could be partially filled by the write |
318 | * buffer, but there are some holes that need to be read from | |
a96de64a IK |
319 | * the drive. In order to handle this, we will use block layer |
320 | * mechanism to split this request in to smaller ones and make | |
321 | * a chain of it. | |
3e03f632 | 322 | */ |
a96de64a IK |
323 | split_bio = bio_split(bio, nr_secs * NR_PHY_IN_LOG, GFP_KERNEL, |
324 | &pblk_bio_set); | |
325 | bio_chain(split_bio, bio); | |
326 | generic_make_request(bio); | |
327 | ||
328 | /* New bio contains first N sectors of the previous one, so | |
329 | * we can continue to use existing rqd, but we need to shrink | |
330 | * the number of PPAs in it. New bio is also guaranteed that | |
331 | * it contains only either data from cache or from drive, newer | |
332 | * mix of them. | |
333 | */ | |
334 | bio = split_bio; | |
335 | rqd->nr_ppas = nr_secs; | |
336 | if (rqd->nr_ppas == 1) | |
337 | rqd->ppa_addr = rqd->ppa_list[0]; | |
a4bd217b | 338 | |
a96de64a IK |
339 | /* Recreate int_bio - existing might have some needed internal |
340 | * fields modified already. | |
341 | */ | |
342 | bio_put(int_bio); | |
343 | int_bio = bio_clone_fast(bio, GFP_KERNEL, &pblk_bio_set); | |
344 | goto split_retry; | |
345 | } else if (pblk_submit_io(pblk, rqd)) { | |
346 | /* Submitting IO to drive failed, let's report an error */ | |
347 | rqd->error = -ENODEV; | |
348 | pblk_end_io_read(rqd); | |
3e03f632 | 349 | } |
a4bd217b JG |
350 | } |
351 | ||
352 | static int read_ppalist_rq_gc(struct pblk *pblk, struct nvm_rq *rqd, | |
353 | struct pblk_line *line, u64 *lba_list, | |
d340121e | 354 | u64 *paddr_list_gc, unsigned int nr_secs) |
a4bd217b | 355 | { |
afdc23c9 | 356 | struct ppa_addr ppa_list_l2p[NVM_MAX_VLBA]; |
d340121e | 357 | struct ppa_addr ppa_gc; |
a4bd217b JG |
358 | int valid_secs = 0; |
359 | int i; | |
360 | ||
d340121e | 361 | pblk_lookup_l2p_rand(pblk, ppa_list_l2p, lba_list, nr_secs); |
a4bd217b JG |
362 | |
363 | for (i = 0; i < nr_secs; i++) { | |
d340121e JG |
364 | if (lba_list[i] == ADDR_EMPTY) |
365 | continue; | |
366 | ||
367 | ppa_gc = addr_to_gen_ppa(pblk, paddr_list_gc[i], line->id); | |
368 | if (!pblk_ppa_comp(ppa_list_l2p[i], ppa_gc)) { | |
369 | paddr_list_gc[i] = lba_list[i] = ADDR_EMPTY; | |
a4bd217b JG |
370 | continue; |
371 | } | |
372 | ||
d340121e | 373 | rqd->ppa_list[valid_secs++] = ppa_list_l2p[i]; |
a4bd217b JG |
374 | } |
375 | ||
880eda54 | 376 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
377 | atomic_long_add(valid_secs, &pblk->inflight_reads); |
378 | #endif | |
d340121e | 379 | |
a4bd217b JG |
380 | return valid_secs; |
381 | } | |
382 | ||
383 | static int read_rq_gc(struct pblk *pblk, struct nvm_rq *rqd, | |
d340121e JG |
384 | struct pblk_line *line, sector_t lba, |
385 | u64 paddr_gc) | |
a4bd217b | 386 | { |
d340121e | 387 | struct ppa_addr ppa_l2p, ppa_gc; |
a4bd217b JG |
388 | int valid_secs = 0; |
389 | ||
659226eb DC |
390 | if (lba == ADDR_EMPTY) |
391 | goto out; | |
392 | ||
a4bd217b | 393 | /* logic error: lba out-of-bounds */ |
847a3a27 | 394 | if (lba >= pblk->capacity) { |
2a79efd8 | 395 | WARN(1, "pblk: read lba out of bounds\n"); |
a4bd217b JG |
396 | goto out; |
397 | } | |
398 | ||
a4bd217b | 399 | spin_lock(&pblk->trans_lock); |
d340121e | 400 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
a4bd217b JG |
401 | spin_unlock(&pblk->trans_lock); |
402 | ||
d340121e JG |
403 | ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, line->id); |
404 | if (!pblk_ppa_comp(ppa_l2p, ppa_gc)) | |
a4bd217b JG |
405 | goto out; |
406 | ||
d340121e | 407 | rqd->ppa_addr = ppa_l2p; |
a4bd217b JG |
408 | valid_secs = 1; |
409 | ||
880eda54 | 410 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
411 | atomic_long_inc(&pblk->inflight_reads); |
412 | #endif | |
413 | ||
414 | out: | |
415 | return valid_secs; | |
416 | } | |
417 | ||
d340121e | 418 | int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq) |
a4bd217b JG |
419 | { |
420 | struct nvm_tgt_dev *dev = pblk->dev; | |
421 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b JG |
422 | struct bio *bio; |
423 | struct nvm_rq rqd; | |
d340121e JG |
424 | int data_len; |
425 | int ret = NVM_IO_OK; | |
a4bd217b JG |
426 | |
427 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
428 | ||
45dcf29b JG |
429 | ret = pblk_alloc_rqd_meta(pblk, &rqd); |
430 | if (ret) | |
431 | return ret; | |
63e3809c | 432 | |
d340121e | 433 | if (gc_rq->nr_secs > 1) { |
d340121e JG |
434 | gc_rq->secs_to_gc = read_ppalist_rq_gc(pblk, &rqd, gc_rq->line, |
435 | gc_rq->lba_list, | |
436 | gc_rq->paddr_list, | |
437 | gc_rq->nr_secs); | |
438 | if (gc_rq->secs_to_gc == 1) | |
63e3809c | 439 | rqd.ppa_addr = rqd.ppa_list[0]; |
a4bd217b | 440 | } else { |
d340121e JG |
441 | gc_rq->secs_to_gc = read_rq_gc(pblk, &rqd, gc_rq->line, |
442 | gc_rq->lba_list[0], | |
443 | gc_rq->paddr_list[0]); | |
a4bd217b JG |
444 | } |
445 | ||
d340121e | 446 | if (!(gc_rq->secs_to_gc)) |
a4bd217b JG |
447 | goto out; |
448 | ||
e46f4e48 | 449 | data_len = (gc_rq->secs_to_gc) * geo->csecs; |
d340121e | 450 | bio = pblk_bio_map_addr(pblk, gc_rq->data, gc_rq->secs_to_gc, data_len, |
7d327a9e | 451 | PBLK_VMALLOC_META, GFP_KERNEL); |
a4bd217b | 452 | if (IS_ERR(bio)) { |
4e495a46 | 453 | pblk_err(pblk, "could not allocate GC bio (%lu)\n", |
45dcf29b JG |
454 | PTR_ERR(bio)); |
455 | ret = PTR_ERR(bio); | |
a4bd217b JG |
456 | goto err_free_dma; |
457 | } | |
458 | ||
459 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
460 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
461 | ||
462 | rqd.opcode = NVM_OP_PREAD; | |
d340121e | 463 | rqd.nr_ppas = gc_rq->secs_to_gc; |
a4bd217b JG |
464 | rqd.bio = bio; |
465 | ||
1a94b2d4 | 466 | if (pblk_submit_io_sync(pblk, &rqd)) { |
d340121e | 467 | ret = -EIO; |
7d327a9e | 468 | goto err_free_bio; |
a4bd217b JG |
469 | } |
470 | ||
03a34b2d | 471 | pblk_read_check_rand(pblk, &rqd, gc_rq->lba_list, gc_rq->nr_secs); |
310df582 | 472 | |
588726d3 | 473 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
474 | |
475 | if (rqd.error) { | |
476 | atomic_long_inc(&pblk->read_failed_gc); | |
880eda54 | 477 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
478 | pblk_print_failed_rqd(pblk, &rqd, rqd.error); |
479 | #endif | |
480 | } | |
481 | ||
880eda54 | 482 | #ifdef CONFIG_NVM_PBLK_DEBUG |
d340121e JG |
483 | atomic_long_add(gc_rq->secs_to_gc, &pblk->sync_reads); |
484 | atomic_long_add(gc_rq->secs_to_gc, &pblk->recov_gc_reads); | |
485 | atomic_long_sub(gc_rq->secs_to_gc, &pblk->inflight_reads); | |
a4bd217b JG |
486 | #endif |
487 | ||
488 | out: | |
45dcf29b | 489 | pblk_free_rqd_meta(pblk, &rqd); |
d340121e | 490 | return ret; |
a4bd217b | 491 | |
7d327a9e JG |
492 | err_free_bio: |
493 | bio_put(bio); | |
a4bd217b | 494 | err_free_dma: |
45dcf29b | 495 | pblk_free_rqd_meta(pblk, &rqd); |
d340121e | 496 | return ret; |
a4bd217b | 497 | } |