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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-read.c - pblk's read path | |
16 | */ | |
17 | ||
18 | #include "pblk.h" | |
19 | ||
20 | /* | |
21 | * There is no guarantee that the value read from cache has not been updated and | |
22 | * resides at another location in the cache. We guarantee though that if the | |
23 | * value is read from the cache, it belongs to the mapped lba. In order to | |
24 | * guarantee and order between writes and reads are ordered, a flush must be | |
25 | * issued. | |
26 | */ | |
27 | static int pblk_read_from_cache(struct pblk *pblk, struct bio *bio, | |
28 | sector_t lba, struct ppa_addr ppa, | |
29 | int bio_iter) | |
30 | { | |
31 | #ifdef CONFIG_NVM_DEBUG | |
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 | ||
07698466 | 37 | return pblk_rb_copy_to_bio(&pblk->rwb, bio, lba, ppa, bio_iter); |
a4bd217b JG |
38 | } |
39 | ||
40 | static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
41 | unsigned long *read_bitmap) | |
42 | { | |
43 | struct bio *bio = rqd->bio; | |
44 | struct ppa_addr ppas[PBLK_MAX_REQ_ADDRS]; | |
45 | sector_t blba = pblk_get_lba(bio); | |
46 | int nr_secs = rqd->nr_ppas; | |
47 | int advanced_bio = 0; | |
48 | int i, j = 0; | |
49 | ||
50 | /* logic error: lba out-of-bounds. Ignore read request */ | |
2a79efd8 DC |
51 | if (blba + nr_secs >= pblk->rl.nr_secs) { |
52 | WARN(1, "pblk: read lbas out of bounds\n"); | |
a4bd217b JG |
53 | return; |
54 | } | |
55 | ||
56 | pblk_lookup_l2p_seq(pblk, ppas, blba, nr_secs); | |
57 | ||
58 | for (i = 0; i < nr_secs; i++) { | |
59 | struct ppa_addr p = ppas[i]; | |
60 | sector_t lba = blba + i; | |
61 | ||
62 | retry: | |
63 | if (pblk_ppa_empty(p)) { | |
64 | WARN_ON(test_and_set_bit(i, read_bitmap)); | |
65 | continue; | |
66 | } | |
67 | ||
68 | /* Try to read from write buffer. The address is later checked | |
69 | * on the write buffer to prevent retrieving overwritten data. | |
70 | */ | |
71 | if (pblk_addr_in_cache(p)) { | |
72 | if (!pblk_read_from_cache(pblk, bio, lba, p, i)) { | |
73 | pblk_lookup_l2p_seq(pblk, &p, lba, 1); | |
74 | goto retry; | |
75 | } | |
76 | WARN_ON(test_and_set_bit(i, read_bitmap)); | |
77 | advanced_bio = 1; | |
db7ada33 JG |
78 | #ifdef CONFIG_NVM_DEBUG |
79 | atomic_long_inc(&pblk->cache_reads); | |
80 | #endif | |
a4bd217b JG |
81 | } else { |
82 | /* Read from media non-cached sectors */ | |
83 | rqd->ppa_list[j++] = p; | |
84 | } | |
85 | ||
86 | if (advanced_bio) | |
87 | bio_advance(bio, PBLK_EXPOSED_PAGE_SIZE); | |
88 | } | |
89 | ||
f9c10152 JG |
90 | if (pblk_io_aligned(pblk, nr_secs)) |
91 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL); | |
92 | else | |
93 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
94 | ||
a4bd217b JG |
95 | #ifdef CONFIG_NVM_DEBUG |
96 | atomic_long_add(nr_secs, &pblk->inflight_reads); | |
97 | #endif | |
98 | } | |
99 | ||
100 | static int pblk_submit_read_io(struct pblk *pblk, struct nvm_rq *rqd) | |
101 | { | |
102 | int err; | |
103 | ||
a4bd217b JG |
104 | err = pblk_submit_io(pblk, rqd); |
105 | if (err) | |
106 | return NVM_IO_ERR; | |
107 | ||
108 | return NVM_IO_OK; | |
109 | } | |
110 | ||
111 | static void pblk_end_io_read(struct nvm_rq *rqd) | |
112 | { | |
113 | struct pblk *pblk = rqd->private; | |
114 | struct nvm_tgt_dev *dev = pblk->dev; | |
084ec9ba | 115 | struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd); |
a4bd217b JG |
116 | struct bio *bio = rqd->bio; |
117 | ||
118 | if (rqd->error) | |
119 | pblk_log_read_err(pblk, rqd); | |
120 | #ifdef CONFIG_NVM_DEBUG | |
121 | else | |
4e4cbee9 | 122 | WARN_ONCE(bio->bi_status, "pblk: corrupted read error\n"); |
a4bd217b JG |
123 | #endif |
124 | ||
63e3809c | 125 | nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list); |
a4bd217b JG |
126 | |
127 | bio_put(bio); | |
084ec9ba JG |
128 | if (r_ctx->private) { |
129 | struct bio *orig_bio = r_ctx->private; | |
130 | ||
a4bd217b | 131 | #ifdef CONFIG_NVM_DEBUG |
084ec9ba | 132 | WARN_ONCE(orig_bio->bi_status, "pblk: corrupted read bio\n"); |
a4bd217b | 133 | #endif |
084ec9ba JG |
134 | bio_endio(orig_bio); |
135 | bio_put(orig_bio); | |
a4bd217b JG |
136 | } |
137 | ||
138 | #ifdef CONFIG_NVM_DEBUG | |
139 | atomic_long_add(rqd->nr_ppas, &pblk->sync_reads); | |
140 | atomic_long_sub(rqd->nr_ppas, &pblk->inflight_reads); | |
141 | #endif | |
142 | ||
143 | pblk_free_rqd(pblk, rqd, READ); | |
588726d3 | 144 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
145 | } |
146 | ||
147 | static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd, | |
148 | unsigned int bio_init_idx, | |
149 | unsigned long *read_bitmap) | |
150 | { | |
151 | struct bio *new_bio, *bio = rqd->bio; | |
152 | struct bio_vec src_bv, dst_bv; | |
153 | void *ppa_ptr = NULL; | |
154 | void *src_p, *dst_p; | |
155 | dma_addr_t dma_ppa_list = 0; | |
156 | int nr_secs = rqd->nr_ppas; | |
157 | int nr_holes = nr_secs - bitmap_weight(read_bitmap, nr_secs); | |
158 | int i, ret, hole; | |
159 | DECLARE_COMPLETION_ONSTACK(wait); | |
160 | ||
161 | new_bio = bio_alloc(GFP_KERNEL, nr_holes); | |
162 | if (!new_bio) { | |
163 | pr_err("pblk: could not alloc read bio\n"); | |
164 | return NVM_IO_ERR; | |
165 | } | |
166 | ||
167 | if (pblk_bio_add_pages(pblk, new_bio, GFP_KERNEL, nr_holes)) | |
168 | goto err; | |
169 | ||
170 | if (nr_holes != new_bio->bi_vcnt) { | |
171 | pr_err("pblk: malformed bio\n"); | |
172 | goto err; | |
173 | } | |
174 | ||
175 | new_bio->bi_iter.bi_sector = 0; /* internal bio */ | |
176 | bio_set_op_attrs(new_bio, REQ_OP_READ, 0); | |
177 | new_bio->bi_private = &wait; | |
178 | new_bio->bi_end_io = pblk_end_bio_sync; | |
179 | ||
180 | rqd->bio = new_bio; | |
181 | rqd->nr_ppas = nr_holes; | |
f9c10152 | 182 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); |
a4bd217b JG |
183 | rqd->end_io = NULL; |
184 | ||
185 | if (unlikely(nr_secs > 1 && nr_holes == 1)) { | |
186 | ppa_ptr = rqd->ppa_list; | |
187 | dma_ppa_list = rqd->dma_ppa_list; | |
188 | rqd->ppa_addr = rqd->ppa_list[0]; | |
189 | } | |
190 | ||
191 | ret = pblk_submit_read_io(pblk, rqd); | |
192 | if (ret) { | |
193 | bio_put(rqd->bio); | |
194 | pr_err("pblk: read IO submission failed\n"); | |
195 | goto err; | |
196 | } | |
197 | ||
198 | if (!wait_for_completion_io_timeout(&wait, | |
199 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
200 | pr_err("pblk: partial read I/O timed out\n"); | |
201 | } | |
202 | ||
203 | if (rqd->error) { | |
204 | atomic_long_inc(&pblk->read_failed); | |
205 | #ifdef CONFIG_NVM_DEBUG | |
206 | pblk_print_failed_rqd(pblk, rqd, rqd->error); | |
207 | #endif | |
208 | } | |
209 | ||
210 | if (unlikely(nr_secs > 1 && nr_holes == 1)) { | |
211 | rqd->ppa_list = ppa_ptr; | |
212 | rqd->dma_ppa_list = dma_ppa_list; | |
213 | } | |
214 | ||
215 | /* Fill the holes in the original bio */ | |
216 | i = 0; | |
217 | hole = find_first_zero_bit(read_bitmap, nr_secs); | |
218 | do { | |
219 | src_bv = new_bio->bi_io_vec[i++]; | |
220 | dst_bv = bio->bi_io_vec[bio_init_idx + hole]; | |
221 | ||
222 | src_p = kmap_atomic(src_bv.bv_page); | |
223 | dst_p = kmap_atomic(dst_bv.bv_page); | |
224 | ||
225 | memcpy(dst_p + dst_bv.bv_offset, | |
226 | src_p + src_bv.bv_offset, | |
227 | PBLK_EXPOSED_PAGE_SIZE); | |
228 | ||
229 | kunmap_atomic(src_p); | |
230 | kunmap_atomic(dst_p); | |
231 | ||
232 | mempool_free(src_bv.bv_page, pblk->page_pool); | |
233 | ||
234 | hole = find_next_zero_bit(read_bitmap, nr_secs, hole + 1); | |
235 | } while (hole < nr_secs); | |
236 | ||
237 | bio_put(new_bio); | |
238 | ||
239 | /* Complete the original bio and associated request */ | |
240 | rqd->bio = bio; | |
241 | rqd->nr_ppas = nr_secs; | |
242 | rqd->private = pblk; | |
243 | ||
244 | bio_endio(bio); | |
245 | pblk_end_io_read(rqd); | |
246 | return NVM_IO_OK; | |
247 | ||
248 | err: | |
249 | /* Free allocated pages in new bio */ | |
250 | pblk_bio_free_pages(pblk, bio, 0, new_bio->bi_vcnt); | |
251 | rqd->private = pblk; | |
252 | pblk_end_io_read(rqd); | |
253 | return NVM_IO_ERR; | |
254 | } | |
255 | ||
256 | static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
257 | unsigned long *read_bitmap) | |
258 | { | |
259 | struct bio *bio = rqd->bio; | |
260 | struct ppa_addr ppa; | |
261 | sector_t lba = pblk_get_lba(bio); | |
262 | ||
263 | /* logic error: lba out-of-bounds. Ignore read request */ | |
2a79efd8 DC |
264 | if (lba >= pblk->rl.nr_secs) { |
265 | WARN(1, "pblk: read lba out of bounds\n"); | |
a4bd217b JG |
266 | return; |
267 | } | |
268 | ||
269 | pblk_lookup_l2p_seq(pblk, &ppa, lba, 1); | |
270 | ||
271 | #ifdef CONFIG_NVM_DEBUG | |
272 | atomic_long_inc(&pblk->inflight_reads); | |
273 | #endif | |
274 | ||
275 | retry: | |
276 | if (pblk_ppa_empty(ppa)) { | |
277 | WARN_ON(test_and_set_bit(0, read_bitmap)); | |
278 | return; | |
279 | } | |
280 | ||
281 | /* Try to read from write buffer. The address is later checked on the | |
282 | * write buffer to prevent retrieving overwritten data. | |
283 | */ | |
284 | if (pblk_addr_in_cache(ppa)) { | |
285 | if (!pblk_read_from_cache(pblk, bio, lba, ppa, 0)) { | |
286 | pblk_lookup_l2p_seq(pblk, &ppa, lba, 1); | |
287 | goto retry; | |
288 | } | |
289 | WARN_ON(test_and_set_bit(0, read_bitmap)); | |
db7ada33 JG |
290 | #ifdef CONFIG_NVM_DEBUG |
291 | atomic_long_inc(&pblk->cache_reads); | |
292 | #endif | |
a4bd217b JG |
293 | } else { |
294 | rqd->ppa_addr = ppa; | |
295 | } | |
f9c10152 JG |
296 | |
297 | rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); | |
a4bd217b JG |
298 | } |
299 | ||
300 | int pblk_submit_read(struct pblk *pblk, struct bio *bio) | |
301 | { | |
302 | struct nvm_tgt_dev *dev = pblk->dev; | |
5bf1e1ee | 303 | unsigned int nr_secs = pblk_get_secs(bio); |
a4bd217b JG |
304 | struct nvm_rq *rqd; |
305 | unsigned long read_bitmap; /* Max 64 ppas per request */ | |
306 | unsigned int bio_init_idx; | |
307 | int ret = NVM_IO_ERR; | |
308 | ||
309 | if (nr_secs > PBLK_MAX_REQ_ADDRS) | |
310 | return NVM_IO_ERR; | |
311 | ||
312 | bitmap_zero(&read_bitmap, nr_secs); | |
313 | ||
314 | rqd = pblk_alloc_rqd(pblk, READ); | |
315 | if (IS_ERR(rqd)) { | |
316 | pr_err_ratelimited("pblk: not able to alloc rqd"); | |
317 | return NVM_IO_ERR; | |
318 | } | |
319 | ||
320 | rqd->opcode = NVM_OP_PREAD; | |
321 | rqd->bio = bio; | |
322 | rqd->nr_ppas = nr_secs; | |
323 | rqd->private = pblk; | |
324 | rqd->end_io = pblk_end_io_read; | |
325 | ||
326 | /* Save the index for this bio's start. This is needed in case | |
327 | * we need to fill a partial read. | |
328 | */ | |
329 | bio_init_idx = pblk_get_bi_idx(bio); | |
330 | ||
63e3809c JG |
331 | rqd->meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, |
332 | &rqd->dma_meta_list); | |
333 | if (!rqd->meta_list) { | |
334 | pr_err("pblk: not able to allocate ppa list\n"); | |
335 | goto fail_rqd_free; | |
336 | } | |
337 | ||
a4bd217b | 338 | if (nr_secs > 1) { |
63e3809c JG |
339 | rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size; |
340 | rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size; | |
a4bd217b JG |
341 | |
342 | pblk_read_ppalist_rq(pblk, rqd, &read_bitmap); | |
343 | } else { | |
344 | pblk_read_rq(pblk, rqd, &read_bitmap); | |
345 | } | |
346 | ||
347 | bio_get(bio); | |
348 | if (bitmap_full(&read_bitmap, nr_secs)) { | |
349 | bio_endio(bio); | |
588726d3 | 350 | atomic_inc(&pblk->inflight_io); |
a4bd217b JG |
351 | pblk_end_io_read(rqd); |
352 | return NVM_IO_OK; | |
353 | } | |
354 | ||
355 | /* All sectors are to be read from the device */ | |
356 | if (bitmap_empty(&read_bitmap, rqd->nr_ppas)) { | |
357 | struct bio *int_bio = NULL; | |
084ec9ba | 358 | struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd); |
a4bd217b JG |
359 | |
360 | /* Clone read bio to deal with read errors internally */ | |
b25d5237 | 361 | int_bio = bio_clone_fast(bio, GFP_KERNEL, pblk_bio_set); |
a4bd217b JG |
362 | if (!int_bio) { |
363 | pr_err("pblk: could not clone read bio\n"); | |
364 | return NVM_IO_ERR; | |
365 | } | |
366 | ||
367 | rqd->bio = int_bio; | |
084ec9ba | 368 | r_ctx->private = bio; |
a4bd217b JG |
369 | |
370 | ret = pblk_submit_read_io(pblk, rqd); | |
371 | if (ret) { | |
372 | pr_err("pblk: read IO submission failed\n"); | |
373 | if (int_bio) | |
374 | bio_put(int_bio); | |
375 | return ret; | |
376 | } | |
377 | ||
378 | return NVM_IO_OK; | |
379 | } | |
380 | ||
381 | /* The read bio request could be partially filled by the write buffer, | |
382 | * but there are some holes that need to be read from the drive. | |
383 | */ | |
384 | ret = pblk_fill_partial_read_bio(pblk, rqd, bio_init_idx, &read_bitmap); | |
385 | if (ret) { | |
386 | pr_err("pblk: failed to perform partial read\n"); | |
387 | return ret; | |
388 | } | |
389 | ||
390 | return NVM_IO_OK; | |
391 | ||
392 | fail_rqd_free: | |
393 | pblk_free_rqd(pblk, rqd, READ); | |
394 | return ret; | |
395 | } | |
396 | ||
397 | static int read_ppalist_rq_gc(struct pblk *pblk, struct nvm_rq *rqd, | |
398 | struct pblk_line *line, u64 *lba_list, | |
399 | unsigned int nr_secs) | |
400 | { | |
401 | struct ppa_addr ppas[PBLK_MAX_REQ_ADDRS]; | |
402 | int valid_secs = 0; | |
403 | int i; | |
404 | ||
405 | pblk_lookup_l2p_rand(pblk, ppas, lba_list, nr_secs); | |
406 | ||
407 | for (i = 0; i < nr_secs; i++) { | |
408 | if (pblk_addr_in_cache(ppas[i]) || ppas[i].g.blk != line->id || | |
409 | pblk_ppa_empty(ppas[i])) { | |
410 | lba_list[i] = ADDR_EMPTY; | |
411 | continue; | |
412 | } | |
413 | ||
414 | rqd->ppa_list[valid_secs++] = ppas[i]; | |
415 | } | |
416 | ||
417 | #ifdef CONFIG_NVM_DEBUG | |
418 | atomic_long_add(valid_secs, &pblk->inflight_reads); | |
419 | #endif | |
420 | return valid_secs; | |
421 | } | |
422 | ||
423 | static int read_rq_gc(struct pblk *pblk, struct nvm_rq *rqd, | |
424 | struct pblk_line *line, sector_t lba) | |
425 | { | |
426 | struct ppa_addr ppa; | |
427 | int valid_secs = 0; | |
428 | ||
659226eb DC |
429 | if (lba == ADDR_EMPTY) |
430 | goto out; | |
431 | ||
a4bd217b | 432 | /* logic error: lba out-of-bounds */ |
2a79efd8 DC |
433 | if (lba >= pblk->rl.nr_secs) { |
434 | WARN(1, "pblk: read lba out of bounds\n"); | |
a4bd217b JG |
435 | goto out; |
436 | } | |
437 | ||
a4bd217b JG |
438 | spin_lock(&pblk->trans_lock); |
439 | ppa = pblk_trans_map_get(pblk, lba); | |
440 | spin_unlock(&pblk->trans_lock); | |
441 | ||
442 | /* Ignore updated values until the moment */ | |
443 | if (pblk_addr_in_cache(ppa) || ppa.g.blk != line->id || | |
444 | pblk_ppa_empty(ppa)) | |
445 | goto out; | |
446 | ||
447 | rqd->ppa_addr = ppa; | |
448 | valid_secs = 1; | |
449 | ||
450 | #ifdef CONFIG_NVM_DEBUG | |
451 | atomic_long_inc(&pblk->inflight_reads); | |
452 | #endif | |
453 | ||
454 | out: | |
455 | return valid_secs; | |
456 | } | |
457 | ||
458 | int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data, | |
459 | unsigned int nr_secs, unsigned int *secs_to_gc, | |
460 | struct pblk_line *line) | |
461 | { | |
462 | struct nvm_tgt_dev *dev = pblk->dev; | |
463 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b JG |
464 | struct bio *bio; |
465 | struct nvm_rq rqd; | |
466 | int ret, data_len; | |
467 | DECLARE_COMPLETION_ONSTACK(wait); | |
468 | ||
469 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
470 | ||
63e3809c JG |
471 | rqd.meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, |
472 | &rqd.dma_meta_list); | |
473 | if (!rqd.meta_list) | |
474 | return NVM_IO_ERR; | |
475 | ||
a4bd217b | 476 | if (nr_secs > 1) { |
63e3809c JG |
477 | rqd.ppa_list = rqd.meta_list + pblk_dma_meta_size; |
478 | rqd.dma_ppa_list = rqd.dma_meta_list + pblk_dma_meta_size; | |
a4bd217b JG |
479 | |
480 | *secs_to_gc = read_ppalist_rq_gc(pblk, &rqd, line, lba_list, | |
481 | nr_secs); | |
63e3809c JG |
482 | if (*secs_to_gc == 1) |
483 | rqd.ppa_addr = rqd.ppa_list[0]; | |
a4bd217b JG |
484 | } else { |
485 | *secs_to_gc = read_rq_gc(pblk, &rqd, line, lba_list[0]); | |
486 | } | |
487 | ||
488 | if (!(*secs_to_gc)) | |
489 | goto out; | |
490 | ||
491 | data_len = (*secs_to_gc) * geo->sec_size; | |
de54e703 JG |
492 | bio = pblk_bio_map_addr(pblk, data, *secs_to_gc, data_len, |
493 | PBLK_KMALLOC_META, GFP_KERNEL); | |
a4bd217b JG |
494 | if (IS_ERR(bio)) { |
495 | pr_err("pblk: could not allocate GC bio (%lu)\n", PTR_ERR(bio)); | |
496 | goto err_free_dma; | |
497 | } | |
498 | ||
499 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
500 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
501 | ||
502 | rqd.opcode = NVM_OP_PREAD; | |
503 | rqd.end_io = pblk_end_io_sync; | |
504 | rqd.private = &wait; | |
505 | rqd.nr_ppas = *secs_to_gc; | |
f9c10152 | 506 | rqd.flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM); |
a4bd217b JG |
507 | rqd.bio = bio; |
508 | ||
509 | ret = pblk_submit_read_io(pblk, &rqd); | |
510 | if (ret) { | |
511 | bio_endio(bio); | |
512 | pr_err("pblk: GC read request failed\n"); | |
513 | goto err_free_dma; | |
514 | } | |
515 | ||
516 | if (!wait_for_completion_io_timeout(&wait, | |
517 | msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) { | |
518 | pr_err("pblk: GC read I/O timed out\n"); | |
519 | } | |
588726d3 | 520 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
521 | |
522 | if (rqd.error) { | |
523 | atomic_long_inc(&pblk->read_failed_gc); | |
524 | #ifdef CONFIG_NVM_DEBUG | |
525 | pblk_print_failed_rqd(pblk, &rqd, rqd.error); | |
526 | #endif | |
527 | } | |
528 | ||
529 | #ifdef CONFIG_NVM_DEBUG | |
530 | atomic_long_add(*secs_to_gc, &pblk->sync_reads); | |
531 | atomic_long_add(*secs_to_gc, &pblk->recov_gc_reads); | |
532 | atomic_long_sub(*secs_to_gc, &pblk->inflight_reads); | |
533 | #endif | |
534 | ||
535 | out: | |
63e3809c | 536 | nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list); |
a4bd217b JG |
537 | return NVM_IO_OK; |
538 | ||
539 | err_free_dma: | |
63e3809c | 540 | nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list); |
a4bd217b JG |
541 | return NVM_IO_ERR; |
542 | } |