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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-core.c - pblk's core functionality | |
17 | * | |
18 | */ | |
19 | ||
4c44abf4 HH |
20 | #define CREATE_TRACE_POINTS |
21 | ||
a4bd217b | 22 | #include "pblk.h" |
4c44abf4 | 23 | #include "pblk-trace.h" |
a4bd217b | 24 | |
8bd40020 JG |
25 | static void pblk_line_mark_bb(struct work_struct *work) |
26 | { | |
27 | struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws, | |
28 | ws); | |
29 | struct pblk *pblk = line_ws->pblk; | |
30 | struct nvm_tgt_dev *dev = pblk->dev; | |
31 | struct ppa_addr *ppa = line_ws->priv; | |
32 | int ret; | |
33 | ||
aff3fb18 | 34 | ret = nvm_set_chunk_meta(dev, ppa, 1, NVM_BLK_T_GRWN_BAD); |
8bd40020 JG |
35 | if (ret) { |
36 | struct pblk_line *line; | |
37 | int pos; | |
38 | ||
cb21665c | 39 | line = pblk_ppa_to_line(pblk, *ppa); |
b1bcfda1 | 40 | pos = pblk_ppa_to_pos(&dev->geo, *ppa); |
8bd40020 | 41 | |
4e495a46 | 42 | pblk_err(pblk, "failed to mark bb, line:%d, pos:%d\n", |
8bd40020 JG |
43 | line->id, pos); |
44 | } | |
45 | ||
46 | kfree(ppa); | |
b906bbb6 | 47 | mempool_free(line_ws, &pblk->gen_ws_pool); |
8bd40020 JG |
48 | } |
49 | ||
a4bd217b | 50 | static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line, |
32ef9412 | 51 | struct ppa_addr ppa_addr) |
a4bd217b JG |
52 | { |
53 | struct nvm_tgt_dev *dev = pblk->dev; | |
54 | struct nvm_geo *geo = &dev->geo; | |
32ef9412 JG |
55 | struct ppa_addr *ppa; |
56 | int pos = pblk_ppa_to_pos(geo, ppa_addr); | |
a4bd217b | 57 | |
4e495a46 | 58 | pblk_debug(pblk, "erase failed: line:%d, pos:%d\n", line->id, pos); |
a4bd217b JG |
59 | atomic_long_inc(&pblk->erase_failed); |
60 | ||
a44f53fa | 61 | atomic_dec(&line->blk_in_line); |
a4bd217b | 62 | if (test_and_set_bit(pos, line->blk_bitmap)) |
4e495a46 | 63 | pblk_err(pblk, "attempted to erase bb: line:%d, pos:%d\n", |
a4bd217b JG |
64 | line->id, pos); |
65 | ||
32ef9412 JG |
66 | /* Not necessary to mark bad blocks on 2.0 spec. */ |
67 | if (geo->version == NVM_OCSSD_SPEC_20) | |
68 | return; | |
69 | ||
70 | ppa = kmalloc(sizeof(struct ppa_addr), GFP_ATOMIC); | |
71 | if (!ppa) | |
72 | return; | |
73 | ||
74 | *ppa = ppa_addr; | |
b84ae4a8 JG |
75 | pblk_gen_run_ws(pblk, NULL, ppa, pblk_line_mark_bb, |
76 | GFP_ATOMIC, pblk->bb_wq); | |
a4bd217b JG |
77 | } |
78 | ||
79 | static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd) | |
80 | { | |
32ef9412 JG |
81 | struct nvm_tgt_dev *dev = pblk->dev; |
82 | struct nvm_geo *geo = &dev->geo; | |
83 | struct nvm_chk_meta *chunk; | |
a4bd217b | 84 | struct pblk_line *line; |
32ef9412 | 85 | int pos; |
a4bd217b | 86 | |
cb21665c | 87 | line = pblk_ppa_to_line(pblk, rqd->ppa_addr); |
32ef9412 JG |
88 | pos = pblk_ppa_to_pos(geo, rqd->ppa_addr); |
89 | chunk = &line->chks[pos]; | |
90 | ||
a4bd217b JG |
91 | atomic_dec(&line->left_seblks); |
92 | ||
93 | if (rqd->error) { | |
4209c31c HH |
94 | trace_pblk_chunk_reset(pblk_disk_name(pblk), |
95 | &rqd->ppa_addr, PBLK_CHUNK_RESET_FAILED); | |
96 | ||
32ef9412 JG |
97 | chunk->state = NVM_CHK_ST_OFFLINE; |
98 | pblk_mark_bb(pblk, line, rqd->ppa_addr); | |
99 | } else { | |
4209c31c HH |
100 | trace_pblk_chunk_reset(pblk_disk_name(pblk), |
101 | &rqd->ppa_addr, PBLK_CHUNK_RESET_DONE); | |
102 | ||
32ef9412 | 103 | chunk->state = NVM_CHK_ST_FREE; |
a4bd217b | 104 | } |
588726d3 | 105 | |
4c44abf4 HH |
106 | trace_pblk_chunk_state(pblk_disk_name(pblk), &rqd->ppa_addr, |
107 | chunk->state); | |
108 | ||
588726d3 | 109 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
110 | } |
111 | ||
112 | /* Erase completion assumes that only one block is erased at the time */ | |
113 | static void pblk_end_io_erase(struct nvm_rq *rqd) | |
114 | { | |
115 | struct pblk *pblk = rqd->private; | |
116 | ||
a4bd217b | 117 | __pblk_end_io_erase(pblk, rqd); |
b906bbb6 | 118 | mempool_free(rqd, &pblk->e_rq_pool); |
a4bd217b JG |
119 | } |
120 | ||
32ef9412 JG |
121 | /* |
122 | * Get information for all chunks from the device. | |
123 | * | |
090ee26f | 124 | * The caller is responsible for freeing (vmalloc) the returned structure |
32ef9412 | 125 | */ |
aff3fb18 | 126 | struct nvm_chk_meta *pblk_get_chunk_meta(struct pblk *pblk) |
32ef9412 JG |
127 | { |
128 | struct nvm_tgt_dev *dev = pblk->dev; | |
129 | struct nvm_geo *geo = &dev->geo; | |
130 | struct nvm_chk_meta *meta; | |
131 | struct ppa_addr ppa; | |
132 | unsigned long len; | |
133 | int ret; | |
134 | ||
135 | ppa.ppa = 0; | |
136 | ||
137 | len = geo->all_chunks * sizeof(*meta); | |
090ee26f | 138 | meta = vzalloc(len); |
32ef9412 JG |
139 | if (!meta) |
140 | return ERR_PTR(-ENOMEM); | |
141 | ||
aff3fb18 | 142 | ret = nvm_get_chunk_meta(dev, ppa, geo->all_chunks, meta); |
32ef9412 JG |
143 | if (ret) { |
144 | kfree(meta); | |
145 | return ERR_PTR(-EIO); | |
146 | } | |
147 | ||
148 | return meta; | |
149 | } | |
150 | ||
151 | struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk, | |
152 | struct nvm_chk_meta *meta, | |
153 | struct ppa_addr ppa) | |
154 | { | |
155 | struct nvm_tgt_dev *dev = pblk->dev; | |
156 | struct nvm_geo *geo = &dev->geo; | |
157 | int ch_off = ppa.m.grp * geo->num_chk * geo->num_lun; | |
158 | int lun_off = ppa.m.pu * geo->num_chk; | |
159 | int chk_off = ppa.m.chk; | |
160 | ||
161 | return meta + ch_off + lun_off + chk_off; | |
162 | } | |
163 | ||
0880a9aa JG |
164 | void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, |
165 | u64 paddr) | |
a4bd217b JG |
166 | { |
167 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
168 | struct list_head *move_list = NULL; | |
169 | ||
170 | /* Lines being reclaimed (GC'ed) cannot be invalidated. Before the L2P | |
171 | * table is modified with reclaimed sectors, a check is done to endure | |
172 | * that newer updates are not overwritten. | |
173 | */ | |
174 | spin_lock(&line->lock); | |
d340121e | 175 | WARN_ON(line->state == PBLK_LINESTATE_FREE); |
a4bd217b JG |
176 | |
177 | if (test_and_set_bit(paddr, line->invalid_bitmap)) { | |
178 | WARN_ONCE(1, "pblk: double invalidate\n"); | |
179 | spin_unlock(&line->lock); | |
180 | return; | |
181 | } | |
dd2a4343 | 182 | le32_add_cpu(line->vsc, -1); |
a4bd217b JG |
183 | |
184 | if (line->state == PBLK_LINESTATE_CLOSED) | |
185 | move_list = pblk_line_gc_list(pblk, line); | |
186 | spin_unlock(&line->lock); | |
187 | ||
188 | if (move_list) { | |
189 | spin_lock(&l_mg->gc_lock); | |
190 | spin_lock(&line->lock); | |
191 | /* Prevent moving a line that has just been chosen for GC */ | |
d340121e | 192 | if (line->state == PBLK_LINESTATE_GC) { |
a4bd217b JG |
193 | spin_unlock(&line->lock); |
194 | spin_unlock(&l_mg->gc_lock); | |
195 | return; | |
196 | } | |
197 | spin_unlock(&line->lock); | |
198 | ||
199 | list_move_tail(&line->list, move_list); | |
200 | spin_unlock(&l_mg->gc_lock); | |
201 | } | |
202 | } | |
203 | ||
204 | void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa) | |
205 | { | |
206 | struct pblk_line *line; | |
207 | u64 paddr; | |
a4bd217b | 208 | |
880eda54 | 209 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
210 | /* Callers must ensure that the ppa points to a device address */ |
211 | BUG_ON(pblk_addr_in_cache(ppa)); | |
212 | BUG_ON(pblk_ppa_empty(ppa)); | |
213 | #endif | |
214 | ||
cb21665c | 215 | line = pblk_ppa_to_line(pblk, ppa); |
a4bd217b JG |
216 | paddr = pblk_dev_ppa_to_line_addr(pblk, ppa); |
217 | ||
218 | __pblk_map_invalidate(pblk, line, paddr); | |
219 | } | |
220 | ||
a4bd217b JG |
221 | static void pblk_invalidate_range(struct pblk *pblk, sector_t slba, |
222 | unsigned int nr_secs) | |
223 | { | |
224 | sector_t lba; | |
225 | ||
226 | spin_lock(&pblk->trans_lock); | |
227 | for (lba = slba; lba < slba + nr_secs; lba++) { | |
228 | struct ppa_addr ppa; | |
229 | ||
230 | ppa = pblk_trans_map_get(pblk, lba); | |
231 | ||
232 | if (!pblk_addr_in_cache(ppa) && !pblk_ppa_empty(ppa)) | |
233 | pblk_map_invalidate(pblk, ppa); | |
234 | ||
235 | pblk_ppa_set_empty(&ppa); | |
236 | pblk_trans_map_set(pblk, lba, ppa); | |
237 | } | |
238 | spin_unlock(&pblk->trans_lock); | |
239 | } | |
240 | ||
45dcf29b JG |
241 | int pblk_alloc_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd) |
242 | { | |
243 | struct nvm_tgt_dev *dev = pblk->dev; | |
244 | ||
245 | rqd->meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, | |
246 | &rqd->dma_meta_list); | |
247 | if (!rqd->meta_list) | |
248 | return -ENOMEM; | |
249 | ||
250 | if (rqd->nr_ppas == 1) | |
251 | return 0; | |
252 | ||
24828d05 IK |
253 | rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size(pblk); |
254 | rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size(pblk); | |
45dcf29b JG |
255 | |
256 | return 0; | |
257 | } | |
258 | ||
259 | void pblk_free_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd) | |
260 | { | |
261 | struct nvm_tgt_dev *dev = pblk->dev; | |
262 | ||
263 | if (rqd->meta_list) | |
264 | nvm_dev_dma_free(dev->parent, rqd->meta_list, | |
265 | rqd->dma_meta_list); | |
266 | } | |
267 | ||
67bf26a3 JG |
268 | /* Caller must guarantee that the request is a valid type */ |
269 | struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type) | |
a4bd217b JG |
270 | { |
271 | mempool_t *pool; | |
272 | struct nvm_rq *rqd; | |
273 | int rq_size; | |
274 | ||
67bf26a3 JG |
275 | switch (type) { |
276 | case PBLK_WRITE: | |
277 | case PBLK_WRITE_INT: | |
b906bbb6 | 278 | pool = &pblk->w_rq_pool; |
a4bd217b | 279 | rq_size = pblk_w_rq_size; |
67bf26a3 JG |
280 | break; |
281 | case PBLK_READ: | |
b906bbb6 | 282 | pool = &pblk->r_rq_pool; |
084ec9ba | 283 | rq_size = pblk_g_rq_size; |
67bf26a3 JG |
284 | break; |
285 | default: | |
b906bbb6 | 286 | pool = &pblk->e_rq_pool; |
67bf26a3 | 287 | rq_size = pblk_g_rq_size; |
a4bd217b JG |
288 | } |
289 | ||
290 | rqd = mempool_alloc(pool, GFP_KERNEL); | |
291 | memset(rqd, 0, rq_size); | |
292 | ||
293 | return rqd; | |
294 | } | |
295 | ||
67bf26a3 JG |
296 | /* Typically used on completion path. Cannot guarantee request consistency */ |
297 | void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type) | |
a4bd217b JG |
298 | { |
299 | mempool_t *pool; | |
300 | ||
67bf26a3 JG |
301 | switch (type) { |
302 | case PBLK_WRITE: | |
303 | kfree(((struct pblk_c_ctx *)nvm_rq_to_pdu(rqd))->lun_bitmap); | |
884b031b | 304 | /* fall through */ |
67bf26a3 | 305 | case PBLK_WRITE_INT: |
b906bbb6 | 306 | pool = &pblk->w_rq_pool; |
67bf26a3 JG |
307 | break; |
308 | case PBLK_READ: | |
b906bbb6 | 309 | pool = &pblk->r_rq_pool; |
67bf26a3 JG |
310 | break; |
311 | case PBLK_ERASE: | |
b906bbb6 | 312 | pool = &pblk->e_rq_pool; |
67bf26a3 JG |
313 | break; |
314 | default: | |
4e495a46 | 315 | pblk_err(pblk, "trying to free unknown rqd type\n"); |
67bf26a3 JG |
316 | return; |
317 | } | |
a4bd217b | 318 | |
45dcf29b | 319 | pblk_free_rqd_meta(pblk, rqd); |
a4bd217b JG |
320 | mempool_free(rqd, pool); |
321 | } | |
322 | ||
323 | void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, | |
324 | int nr_pages) | |
325 | { | |
326 | struct bio_vec bv; | |
327 | int i; | |
328 | ||
329 | WARN_ON(off + nr_pages != bio->bi_vcnt); | |
330 | ||
a4bd217b JG |
331 | for (i = off; i < nr_pages + off; i++) { |
332 | bv = bio->bi_io_vec[i]; | |
b906bbb6 | 333 | mempool_free(bv.bv_page, &pblk->page_bio_pool); |
a4bd217b JG |
334 | } |
335 | } | |
336 | ||
337 | int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, | |
338 | int nr_pages) | |
339 | { | |
340 | struct request_queue *q = pblk->dev->q; | |
341 | struct page *page; | |
342 | int i, ret; | |
343 | ||
344 | for (i = 0; i < nr_pages; i++) { | |
b906bbb6 | 345 | page = mempool_alloc(&pblk->page_bio_pool, flags); |
a4bd217b JG |
346 | |
347 | ret = bio_add_pc_page(q, bio, page, PBLK_EXPOSED_PAGE_SIZE, 0); | |
348 | if (ret != PBLK_EXPOSED_PAGE_SIZE) { | |
4e495a46 | 349 | pblk_err(pblk, "could not add page to bio\n"); |
b906bbb6 | 350 | mempool_free(page, &pblk->page_bio_pool); |
a4bd217b JG |
351 | goto err; |
352 | } | |
353 | } | |
354 | ||
355 | return 0; | |
356 | err: | |
f142ac0b | 357 | pblk_bio_free_pages(pblk, bio, (bio->bi_vcnt - i), i); |
a4bd217b JG |
358 | return -1; |
359 | } | |
360 | ||
cc9c9a00 | 361 | void pblk_write_kick(struct pblk *pblk) |
a4bd217b JG |
362 | { |
363 | wake_up_process(pblk->writer_ts); | |
364 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(1000)); | |
365 | } | |
366 | ||
87c1d2d3 | 367 | void pblk_write_timer_fn(struct timer_list *t) |
a4bd217b | 368 | { |
87c1d2d3 | 369 | struct pblk *pblk = from_timer(pblk, t, wtimer); |
a4bd217b JG |
370 | |
371 | /* kick the write thread every tick to flush outstanding data */ | |
372 | pblk_write_kick(pblk); | |
373 | } | |
374 | ||
375 | void pblk_write_should_kick(struct pblk *pblk) | |
376 | { | |
377 | unsigned int secs_avail = pblk_rb_read_count(&pblk->rwb); | |
378 | ||
55d8ec35 | 379 | if (secs_avail >= pblk->min_write_pgs_data) |
a4bd217b JG |
380 | pblk_write_kick(pblk); |
381 | } | |
382 | ||
8bd40020 | 383 | static void pblk_wait_for_meta(struct pblk *pblk) |
a4bd217b | 384 | { |
588726d3 JG |
385 | do { |
386 | if (!atomic_read(&pblk->inflight_io)) | |
387 | break; | |
a4bd217b | 388 | |
588726d3 JG |
389 | schedule(); |
390 | } while (1); | |
391 | } | |
a4bd217b | 392 | |
588726d3 JG |
393 | static void pblk_flush_writer(struct pblk *pblk) |
394 | { | |
395 | pblk_rb_flush(&pblk->rwb); | |
396 | do { | |
ee8d5c1a | 397 | if (!pblk_rb_sync_count(&pblk->rwb)) |
588726d3 | 398 | break; |
a4bd217b | 399 | |
ee8d5c1a | 400 | pblk_write_kick(pblk); |
588726d3 JG |
401 | schedule(); |
402 | } while (1); | |
a4bd217b JG |
403 | } |
404 | ||
405 | struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line) | |
406 | { | |
407 | struct pblk_line_meta *lm = &pblk->lm; | |
408 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
409 | struct list_head *move_list = NULL; | |
55d8ec35 IK |
410 | int packed_meta = (le32_to_cpu(*line->vsc) / pblk->min_write_pgs_data) |
411 | * (pblk->min_write_pgs - pblk->min_write_pgs_data); | |
412 | int vsc = le32_to_cpu(*line->vsc) + packed_meta; | |
a4bd217b | 413 | |
476118c9 JG |
414 | lockdep_assert_held(&line->lock); |
415 | ||
48b8d208 HH |
416 | if (line->w_err_gc->has_write_err) { |
417 | if (line->gc_group != PBLK_LINEGC_WERR) { | |
418 | line->gc_group = PBLK_LINEGC_WERR; | |
419 | move_list = &l_mg->gc_werr_list; | |
420 | pblk_rl_werr_line_in(&pblk->rl); | |
421 | } | |
422 | } else if (!vsc) { | |
a4bd217b JG |
423 | if (line->gc_group != PBLK_LINEGC_FULL) { |
424 | line->gc_group = PBLK_LINEGC_FULL; | |
425 | move_list = &l_mg->gc_full_list; | |
426 | } | |
b20ba1bc | 427 | } else if (vsc < lm->high_thrs) { |
a4bd217b JG |
428 | if (line->gc_group != PBLK_LINEGC_HIGH) { |
429 | line->gc_group = PBLK_LINEGC_HIGH; | |
430 | move_list = &l_mg->gc_high_list; | |
431 | } | |
b20ba1bc | 432 | } else if (vsc < lm->mid_thrs) { |
a4bd217b JG |
433 | if (line->gc_group != PBLK_LINEGC_MID) { |
434 | line->gc_group = PBLK_LINEGC_MID; | |
435 | move_list = &l_mg->gc_mid_list; | |
436 | } | |
dd2a4343 | 437 | } else if (vsc < line->sec_in_line) { |
a4bd217b JG |
438 | if (line->gc_group != PBLK_LINEGC_LOW) { |
439 | line->gc_group = PBLK_LINEGC_LOW; | |
440 | move_list = &l_mg->gc_low_list; | |
441 | } | |
dd2a4343 | 442 | } else if (vsc == line->sec_in_line) { |
a4bd217b JG |
443 | if (line->gc_group != PBLK_LINEGC_EMPTY) { |
444 | line->gc_group = PBLK_LINEGC_EMPTY; | |
445 | move_list = &l_mg->gc_empty_list; | |
446 | } | |
447 | } else { | |
448 | line->state = PBLK_LINESTATE_CORRUPT; | |
f2937232 HH |
449 | trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
450 | line->state); | |
451 | ||
a4bd217b JG |
452 | line->gc_group = PBLK_LINEGC_NONE; |
453 | move_list = &l_mg->corrupt_list; | |
4e495a46 | 454 | pblk_err(pblk, "corrupted vsc for line %d, vsc:%d (%d/%d/%d)\n", |
dd2a4343 | 455 | line->id, vsc, |
a4bd217b JG |
456 | line->sec_in_line, |
457 | lm->high_thrs, lm->mid_thrs); | |
458 | } | |
459 | ||
460 | return move_list; | |
461 | } | |
462 | ||
463 | void pblk_discard(struct pblk *pblk, struct bio *bio) | |
464 | { | |
465 | sector_t slba = pblk_get_lba(bio); | |
466 | sector_t nr_secs = pblk_get_secs(bio); | |
467 | ||
468 | pblk_invalidate_range(pblk, slba, nr_secs); | |
469 | } | |
470 | ||
a4bd217b JG |
471 | void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd) |
472 | { | |
473 | atomic_long_inc(&pblk->write_failed); | |
880eda54 | 474 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
475 | pblk_print_failed_rqd(pblk, rqd, rqd->error); |
476 | #endif | |
477 | } | |
478 | ||
479 | void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd) | |
480 | { | |
481 | /* Empty page read is not necessarily an error (e.g., L2P recovery) */ | |
482 | if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) { | |
483 | atomic_long_inc(&pblk->read_empty); | |
484 | return; | |
485 | } | |
486 | ||
487 | switch (rqd->error) { | |
488 | case NVM_RSP_WARN_HIGHECC: | |
489 | atomic_long_inc(&pblk->read_high_ecc); | |
490 | break; | |
491 | case NVM_RSP_ERR_FAILECC: | |
492 | case NVM_RSP_ERR_FAILCRC: | |
493 | atomic_long_inc(&pblk->read_failed); | |
494 | break; | |
495 | default: | |
4e495a46 | 496 | pblk_err(pblk, "unknown read error:%d\n", rqd->error); |
a4bd217b | 497 | } |
880eda54 | 498 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
499 | pblk_print_failed_rqd(pblk, rqd, rqd->error); |
500 | #endif | |
501 | } | |
502 | ||
c2e9f5d4 JG |
503 | void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write) |
504 | { | |
505 | pblk->sec_per_write = sec_per_write; | |
506 | } | |
507 | ||
a4bd217b JG |
508 | int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd) |
509 | { | |
510 | struct nvm_tgt_dev *dev = pblk->dev; | |
511 | ||
b6730dd4 | 512 | atomic_inc(&pblk->inflight_io); |
a4bd217b | 513 | |
880eda54 | 514 | #ifdef CONFIG_NVM_PBLK_DEBUG |
b6730dd4 JG |
515 | if (pblk_check_io(pblk, rqd)) |
516 | return NVM_IO_ERR; | |
1a94b2d4 | 517 | #endif |
a4bd217b | 518 | |
1a94b2d4 JG |
519 | return nvm_submit_io(dev, rqd); |
520 | } | |
a4bd217b | 521 | |
4c44abf4 HH |
522 | void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd) |
523 | { | |
524 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); | |
525 | ||
526 | int i; | |
527 | ||
528 | for (i = 0; i < rqd->nr_ppas; i++) { | |
529 | struct ppa_addr *ppa = &ppa_list[i]; | |
530 | struct nvm_chk_meta *chunk = pblk_dev_ppa_to_chunk(pblk, *ppa); | |
531 | u64 caddr = pblk_dev_ppa_to_chunk_addr(pblk, *ppa); | |
532 | ||
533 | if (caddr == 0) | |
534 | trace_pblk_chunk_state(pblk_disk_name(pblk), | |
535 | ppa, NVM_CHK_ST_OPEN); | |
96076f7d | 536 | else if (caddr == (chunk->cnlb - 1)) |
4c44abf4 HH |
537 | trace_pblk_chunk_state(pblk_disk_name(pblk), |
538 | ppa, NVM_CHK_ST_CLOSED); | |
539 | } | |
540 | } | |
541 | ||
1a94b2d4 JG |
542 | int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd) |
543 | { | |
544 | struct nvm_tgt_dev *dev = pblk->dev; | |
4c44abf4 | 545 | int ret; |
1a94b2d4 | 546 | |
b6730dd4 | 547 | atomic_inc(&pblk->inflight_io); |
1a94b2d4 | 548 | |
880eda54 | 549 | #ifdef CONFIG_NVM_PBLK_DEBUG |
b6730dd4 JG |
550 | if (pblk_check_io(pblk, rqd)) |
551 | return NVM_IO_ERR; | |
a4bd217b | 552 | #endif |
588726d3 | 553 | |
4c44abf4 HH |
554 | ret = nvm_submit_io_sync(dev, rqd); |
555 | ||
556 | if (trace_pblk_chunk_state_enabled() && !ret && | |
557 | rqd->opcode == NVM_OP_PWRITE) | |
558 | pblk_check_chunk_state_update(pblk, rqd); | |
559 | ||
560 | return ret; | |
a4bd217b JG |
561 | } |
562 | ||
253babc3 JG |
563 | int pblk_submit_io_sync_sem(struct pblk *pblk, struct nvm_rq *rqd) |
564 | { | |
565 | struct ppa_addr *ppa_list; | |
566 | int ret; | |
567 | ||
568 | ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr; | |
569 | ||
570 | pblk_down_chunk(pblk, ppa_list[0]); | |
571 | ret = pblk_submit_io_sync(pblk, rqd); | |
572 | pblk_up_chunk(pblk, ppa_list[0]); | |
573 | ||
574 | return ret; | |
575 | } | |
576 | ||
55e836d4 JG |
577 | static void pblk_bio_map_addr_endio(struct bio *bio) |
578 | { | |
579 | bio_put(bio); | |
580 | } | |
581 | ||
a4bd217b JG |
582 | struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data, |
583 | unsigned int nr_secs, unsigned int len, | |
de54e703 | 584 | int alloc_type, gfp_t gfp_mask) |
a4bd217b JG |
585 | { |
586 | struct nvm_tgt_dev *dev = pblk->dev; | |
a4bd217b JG |
587 | void *kaddr = data; |
588 | struct page *page; | |
589 | struct bio *bio; | |
590 | int i, ret; | |
591 | ||
de54e703 | 592 | if (alloc_type == PBLK_KMALLOC_META) |
a4bd217b JG |
593 | return bio_map_kern(dev->q, kaddr, len, gfp_mask); |
594 | ||
595 | bio = bio_kmalloc(gfp_mask, nr_secs); | |
596 | if (!bio) | |
597 | return ERR_PTR(-ENOMEM); | |
598 | ||
599 | for (i = 0; i < nr_secs; i++) { | |
600 | page = vmalloc_to_page(kaddr); | |
601 | if (!page) { | |
4e495a46 | 602 | pblk_err(pblk, "could not map vmalloc bio\n"); |
a4bd217b JG |
603 | bio_put(bio); |
604 | bio = ERR_PTR(-ENOMEM); | |
605 | goto out; | |
606 | } | |
607 | ||
608 | ret = bio_add_pc_page(dev->q, bio, page, PAGE_SIZE, 0); | |
609 | if (ret != PAGE_SIZE) { | |
4e495a46 | 610 | pblk_err(pblk, "could not add page to bio\n"); |
a4bd217b JG |
611 | bio_put(bio); |
612 | bio = ERR_PTR(-ENOMEM); | |
613 | goto out; | |
614 | } | |
615 | ||
616 | kaddr += PAGE_SIZE; | |
617 | } | |
55e836d4 JG |
618 | |
619 | bio->bi_end_io = pblk_bio_map_addr_endio; | |
a4bd217b JG |
620 | out: |
621 | return bio; | |
622 | } | |
623 | ||
624 | int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail, | |
55d8ec35 | 625 | unsigned long secs_to_flush, bool skip_meta) |
a4bd217b | 626 | { |
c2e9f5d4 | 627 | int max = pblk->sec_per_write; |
a4bd217b JG |
628 | int min = pblk->min_write_pgs; |
629 | int secs_to_sync = 0; | |
630 | ||
55d8ec35 IK |
631 | if (skip_meta && pblk->min_write_pgs_data != pblk->min_write_pgs) |
632 | min = max = pblk->min_write_pgs_data; | |
633 | ||
a4bd217b JG |
634 | if (secs_avail >= max) |
635 | secs_to_sync = max; | |
636 | else if (secs_avail >= min) | |
637 | secs_to_sync = min * (secs_avail / min); | |
638 | else if (secs_to_flush) | |
639 | secs_to_sync = min; | |
640 | ||
641 | return secs_to_sync; | |
642 | } | |
643 | ||
dd2a4343 JG |
644 | void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) |
645 | { | |
646 | u64 addr; | |
647 | int i; | |
648 | ||
e57903fd | 649 | spin_lock(&line->lock); |
dd2a4343 JG |
650 | addr = find_next_zero_bit(line->map_bitmap, |
651 | pblk->lm.sec_per_line, line->cur_sec); | |
652 | line->cur_sec = addr - nr_secs; | |
653 | ||
654 | for (i = 0; i < nr_secs; i++, line->cur_sec--) | |
655 | WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap)); | |
e57903fd | 656 | spin_unlock(&line->lock); |
dd2a4343 JG |
657 | } |
658 | ||
659 | u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) | |
a4bd217b JG |
660 | { |
661 | u64 addr; | |
662 | int i; | |
663 | ||
476118c9 JG |
664 | lockdep_assert_held(&line->lock); |
665 | ||
a4bd217b JG |
666 | /* logic error: ppa out-of-bounds. Prevent generating bad address */ |
667 | if (line->cur_sec + nr_secs > pblk->lm.sec_per_line) { | |
668 | WARN(1, "pblk: page allocation out of bounds\n"); | |
669 | nr_secs = pblk->lm.sec_per_line - line->cur_sec; | |
670 | } | |
671 | ||
672 | line->cur_sec = addr = find_next_zero_bit(line->map_bitmap, | |
673 | pblk->lm.sec_per_line, line->cur_sec); | |
674 | for (i = 0; i < nr_secs; i++, line->cur_sec++) | |
675 | WARN_ON(test_and_set_bit(line->cur_sec, line->map_bitmap)); | |
676 | ||
677 | return addr; | |
678 | } | |
679 | ||
680 | u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs) | |
681 | { | |
682 | u64 addr; | |
683 | ||
684 | /* Lock needed in case a write fails and a recovery needs to remap | |
685 | * failed write buffer entries | |
686 | */ | |
687 | spin_lock(&line->lock); | |
688 | addr = __pblk_alloc_page(pblk, line, nr_secs); | |
689 | line->left_msecs -= nr_secs; | |
690 | WARN(line->left_msecs < 0, "pblk: page allocation out of bounds\n"); | |
691 | spin_unlock(&line->lock); | |
692 | ||
693 | return addr; | |
694 | } | |
695 | ||
dd2a4343 JG |
696 | u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line) |
697 | { | |
698 | u64 paddr; | |
699 | ||
700 | spin_lock(&line->lock); | |
701 | paddr = find_next_zero_bit(line->map_bitmap, | |
702 | pblk->lm.sec_per_line, line->cur_sec); | |
703 | spin_unlock(&line->lock); | |
704 | ||
705 | return paddr; | |
706 | } | |
707 | ||
af3fac16 | 708 | u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line) |
a4bd217b JG |
709 | { |
710 | struct nvm_tgt_dev *dev = pblk->dev; | |
711 | struct nvm_geo *geo = &dev->geo; | |
712 | struct pblk_line_meta *lm = &pblk->lm; | |
af3fac16 | 713 | int bit; |
a4bd217b | 714 | |
af3fac16 JG |
715 | /* This usually only happens on bad lines */ |
716 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
717 | if (bit >= lm->blk_per_line) | |
718 | return -1; | |
a4bd217b | 719 | |
af3fac16 JG |
720 | return bit * geo->ws_opt; |
721 | } | |
a4bd217b | 722 | |
af3fac16 JG |
723 | int pblk_line_smeta_read(struct pblk *pblk, struct pblk_line *line) |
724 | { | |
725 | struct nvm_tgt_dev *dev = pblk->dev; | |
726 | struct pblk_line_meta *lm = &pblk->lm; | |
727 | struct bio *bio; | |
728 | struct nvm_rq rqd; | |
729 | u64 paddr = pblk_line_smeta_start(pblk, line); | |
730 | int i, ret; | |
63e3809c | 731 | |
a4bd217b JG |
732 | memset(&rqd, 0, sizeof(struct nvm_rq)); |
733 | ||
af3fac16 JG |
734 | ret = pblk_alloc_rqd_meta(pblk, &rqd); |
735 | if (ret) | |
736 | return ret; | |
a4bd217b | 737 | |
af3fac16 | 738 | bio = bio_map_kern(dev->q, line->smeta, lm->smeta_len, GFP_KERNEL); |
a4bd217b JG |
739 | if (IS_ERR(bio)) { |
740 | ret = PTR_ERR(bio); | |
af3fac16 | 741 | goto clear_rqd; |
a4bd217b JG |
742 | } |
743 | ||
744 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
af3fac16 | 745 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
a4bd217b JG |
746 | |
747 | rqd.bio = bio; | |
af3fac16 JG |
748 | rqd.opcode = NVM_OP_PREAD; |
749 | rqd.nr_ppas = lm->smeta_sec; | |
750 | rqd.is_seq = 1; | |
a4bd217b | 751 | |
af3fac16 JG |
752 | for (i = 0; i < lm->smeta_sec; i++, paddr++) |
753 | rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id); | |
a4bd217b | 754 | |
1a94b2d4 | 755 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b | 756 | if (ret) { |
af3fac16 | 757 | pblk_err(pblk, "smeta I/O submission failed: %d\n", ret); |
a4bd217b | 758 | bio_put(bio); |
af3fac16 | 759 | goto clear_rqd; |
a4bd217b JG |
760 | } |
761 | ||
588726d3 | 762 | atomic_dec(&pblk->inflight_io); |
a4bd217b | 763 | |
af3fac16 JG |
764 | if (rqd.error) |
765 | pblk_log_read_err(pblk, &rqd); | |
a4bd217b | 766 | |
af3fac16 JG |
767 | clear_rqd: |
768 | pblk_free_rqd_meta(pblk, &rqd); | |
a4bd217b JG |
769 | return ret; |
770 | } | |
771 | ||
af3fac16 JG |
772 | static int pblk_line_smeta_write(struct pblk *pblk, struct pblk_line *line, |
773 | u64 paddr) | |
a4bd217b JG |
774 | { |
775 | struct nvm_tgt_dev *dev = pblk->dev; | |
776 | struct pblk_line_meta *lm = &pblk->lm; | |
777 | struct bio *bio; | |
778 | struct nvm_rq rqd; | |
af3fac16 JG |
779 | __le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf); |
780 | __le64 addr_empty = cpu_to_le64(ADDR_EMPTY); | |
a4bd217b | 781 | int i, ret; |
a4bd217b JG |
782 | |
783 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
784 | ||
45dcf29b JG |
785 | ret = pblk_alloc_rqd_meta(pblk, &rqd); |
786 | if (ret) | |
787 | return ret; | |
63e3809c | 788 | |
a4bd217b JG |
789 | bio = bio_map_kern(dev->q, line->smeta, lm->smeta_len, GFP_KERNEL); |
790 | if (IS_ERR(bio)) { | |
791 | ret = PTR_ERR(bio); | |
45dcf29b | 792 | goto clear_rqd; |
a4bd217b JG |
793 | } |
794 | ||
795 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
af3fac16 | 796 | bio_set_op_attrs(bio, REQ_OP_WRITE, 0); |
a4bd217b JG |
797 | |
798 | rqd.bio = bio; | |
af3fac16 | 799 | rqd.opcode = NVM_OP_PWRITE; |
a4bd217b | 800 | rqd.nr_ppas = lm->smeta_sec; |
af3fac16 | 801 | rqd.is_seq = 1; |
a4bd217b JG |
802 | |
803 | for (i = 0; i < lm->smeta_sec; i++, paddr++) { | |
faa79f27 IK |
804 | struct pblk_sec_meta *meta = pblk_get_meta(pblk, |
805 | rqd.meta_list, i); | |
63e3809c | 806 | |
a4bd217b | 807 | rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id); |
faa79f27 | 808 | meta->lba = lba_list[paddr] = addr_empty; |
a4bd217b JG |
809 | } |
810 | ||
253babc3 | 811 | ret = pblk_submit_io_sync_sem(pblk, &rqd); |
a4bd217b | 812 | if (ret) { |
4e495a46 | 813 | pblk_err(pblk, "smeta I/O submission failed: %d\n", ret); |
a4bd217b | 814 | bio_put(bio); |
45dcf29b | 815 | goto clear_rqd; |
a4bd217b JG |
816 | } |
817 | ||
588726d3 | 818 | atomic_dec(&pblk->inflight_io); |
a4bd217b JG |
819 | |
820 | if (rqd.error) { | |
af3fac16 JG |
821 | pblk_log_write_err(pblk, &rqd); |
822 | ret = -EIO; | |
a4bd217b JG |
823 | } |
824 | ||
45dcf29b JG |
825 | clear_rqd: |
826 | pblk_free_rqd_meta(pblk, &rqd); | |
a4bd217b JG |
827 | return ret; |
828 | } | |
829 | ||
af3fac16 JG |
830 | int pblk_line_emeta_read(struct pblk *pblk, struct pblk_line *line, |
831 | void *emeta_buf) | |
a4bd217b | 832 | { |
af3fac16 JG |
833 | struct nvm_tgt_dev *dev = pblk->dev; |
834 | struct nvm_geo *geo = &dev->geo; | |
835 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
836 | struct pblk_line_meta *lm = &pblk->lm; | |
837 | void *ppa_list, *meta_list; | |
838 | struct bio *bio; | |
839 | struct nvm_rq rqd; | |
840 | u64 paddr = line->emeta_ssec; | |
841 | dma_addr_t dma_ppa_list, dma_meta_list; | |
842 | int min = pblk->min_write_pgs; | |
843 | int left_ppas = lm->emeta_sec[0]; | |
844 | int line_id = line->id; | |
845 | int rq_ppas, rq_len; | |
846 | int i, j; | |
847 | int ret; | |
a4bd217b | 848 | |
af3fac16 JG |
849 | meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, |
850 | &dma_meta_list); | |
851 | if (!meta_list) | |
852 | return -ENOMEM; | |
a4bd217b | 853 | |
24828d05 IK |
854 | ppa_list = meta_list + pblk_dma_meta_size(pblk); |
855 | dma_ppa_list = dma_meta_list + pblk_dma_meta_size(pblk); | |
af3fac16 JG |
856 | |
857 | next_rq: | |
858 | memset(&rqd, 0, sizeof(struct nvm_rq)); | |
859 | ||
55d8ec35 | 860 | rq_ppas = pblk_calc_secs(pblk, left_ppas, 0, false); |
af3fac16 JG |
861 | rq_len = rq_ppas * geo->csecs; |
862 | ||
863 | bio = pblk_bio_map_addr(pblk, emeta_buf, rq_ppas, rq_len, | |
864 | l_mg->emeta_alloc_type, GFP_KERNEL); | |
865 | if (IS_ERR(bio)) { | |
866 | ret = PTR_ERR(bio); | |
867 | goto free_rqd_dma; | |
868 | } | |
869 | ||
870 | bio->bi_iter.bi_sector = 0; /* internal bio */ | |
871 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
872 | ||
873 | rqd.bio = bio; | |
874 | rqd.meta_list = meta_list; | |
875 | rqd.ppa_list = ppa_list; | |
876 | rqd.dma_meta_list = dma_meta_list; | |
877 | rqd.dma_ppa_list = dma_ppa_list; | |
878 | rqd.opcode = NVM_OP_PREAD; | |
879 | rqd.nr_ppas = rq_ppas; | |
880 | ||
881 | for (i = 0; i < rqd.nr_ppas; ) { | |
882 | struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, line_id); | |
883 | int pos = pblk_ppa_to_pos(geo, ppa); | |
884 | ||
885 | if (pblk_io_aligned(pblk, rq_ppas)) | |
886 | rqd.is_seq = 1; | |
887 | ||
888 | while (test_bit(pos, line->blk_bitmap)) { | |
889 | paddr += min; | |
890 | if (pblk_boundary_paddr_checks(pblk, paddr)) { | |
891 | bio_put(bio); | |
892 | ret = -EINTR; | |
893 | goto free_rqd_dma; | |
894 | } | |
895 | ||
896 | ppa = addr_to_gen_ppa(pblk, paddr, line_id); | |
897 | pos = pblk_ppa_to_pos(geo, ppa); | |
898 | } | |
899 | ||
900 | if (pblk_boundary_paddr_checks(pblk, paddr + min)) { | |
901 | bio_put(bio); | |
902 | ret = -EINTR; | |
903 | goto free_rqd_dma; | |
904 | } | |
905 | ||
906 | for (j = 0; j < min; j++, i++, paddr++) | |
907 | rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line_id); | |
908 | } | |
909 | ||
910 | ret = pblk_submit_io_sync(pblk, &rqd); | |
911 | if (ret) { | |
912 | pblk_err(pblk, "emeta I/O submission failed: %d\n", ret); | |
913 | bio_put(bio); | |
914 | goto free_rqd_dma; | |
915 | } | |
916 | ||
917 | atomic_dec(&pblk->inflight_io); | |
918 | ||
919 | if (rqd.error) | |
920 | pblk_log_read_err(pblk, &rqd); | |
921 | ||
922 | emeta_buf += rq_len; | |
923 | left_ppas -= rq_ppas; | |
924 | if (left_ppas) | |
925 | goto next_rq; | |
926 | ||
927 | free_rqd_dma: | |
928 | nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list); | |
929 | return ret; | |
a4bd217b JG |
930 | } |
931 | ||
932 | static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
933 | struct ppa_addr ppa) | |
934 | { | |
935 | rqd->opcode = NVM_OP_ERASE; | |
936 | rqd->ppa_addr = ppa; | |
937 | rqd->nr_ppas = 1; | |
d7b68016 | 938 | rqd->is_seq = 1; |
a4bd217b JG |
939 | rqd->bio = NULL; |
940 | } | |
941 | ||
942 | static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa) | |
943 | { | |
4b5d56ed MB |
944 | struct nvm_rq rqd = {NULL}; |
945 | int ret; | |
a4bd217b | 946 | |
4209c31c HH |
947 | trace_pblk_chunk_reset(pblk_disk_name(pblk), &ppa, |
948 | PBLK_CHUNK_RESET_START); | |
949 | ||
a4bd217b JG |
950 | pblk_setup_e_rq(pblk, &rqd, ppa); |
951 | ||
a4bd217b JG |
952 | /* The write thread schedules erases so that it minimizes disturbances |
953 | * with writes. Thus, there is no need to take the LUN semaphore. | |
954 | */ | |
1a94b2d4 | 955 | ret = pblk_submit_io_sync(pblk, &rqd); |
a4bd217b JG |
956 | rqd.private = pblk; |
957 | __pblk_end_io_erase(pblk, &rqd); | |
958 | ||
588726d3 | 959 | return ret; |
a4bd217b JG |
960 | } |
961 | ||
962 | int pblk_line_erase(struct pblk *pblk, struct pblk_line *line) | |
963 | { | |
964 | struct pblk_line_meta *lm = &pblk->lm; | |
965 | struct ppa_addr ppa; | |
588726d3 | 966 | int ret, bit = -1; |
a4bd217b | 967 | |
a44f53fa JG |
968 | /* Erase only good blocks, one at a time */ |
969 | do { | |
970 | spin_lock(&line->lock); | |
971 | bit = find_next_zero_bit(line->erase_bitmap, lm->blk_per_line, | |
972 | bit + 1); | |
973 | if (bit >= lm->blk_per_line) { | |
974 | spin_unlock(&line->lock); | |
975 | break; | |
976 | } | |
977 | ||
a4bd217b | 978 | ppa = pblk->luns[bit].bppa; /* set ch and lun */ |
69471513 | 979 | ppa.a.blk = line->id; |
a4bd217b | 980 | |
a44f53fa | 981 | atomic_dec(&line->left_eblks); |
a4bd217b | 982 | WARN_ON(test_and_set_bit(bit, line->erase_bitmap)); |
a44f53fa | 983 | spin_unlock(&line->lock); |
a4bd217b | 984 | |
588726d3 JG |
985 | ret = pblk_blk_erase_sync(pblk, ppa); |
986 | if (ret) { | |
4e495a46 | 987 | pblk_err(pblk, "failed to erase line %d\n", line->id); |
588726d3 | 988 | return ret; |
a4bd217b | 989 | } |
a44f53fa | 990 | } while (1); |
a4bd217b JG |
991 | |
992 | return 0; | |
993 | } | |
994 | ||
dd2a4343 JG |
995 | static void pblk_line_setup_metadata(struct pblk_line *line, |
996 | struct pblk_line_mgmt *l_mg, | |
997 | struct pblk_line_meta *lm) | |
998 | { | |
999 | int meta_line; | |
1000 | ||
588726d3 JG |
1001 | lockdep_assert_held(&l_mg->free_lock); |
1002 | ||
dd2a4343 JG |
1003 | retry_meta: |
1004 | meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
1005 | if (meta_line == PBLK_DATA_LINES) { | |
1006 | spin_unlock(&l_mg->free_lock); | |
1007 | io_schedule(); | |
1008 | spin_lock(&l_mg->free_lock); | |
1009 | goto retry_meta; | |
1010 | } | |
1011 | ||
1012 | set_bit(meta_line, &l_mg->meta_bitmap); | |
1013 | line->meta_line = meta_line; | |
1014 | ||
1015 | line->smeta = l_mg->sline_meta[meta_line]; | |
1016 | line->emeta = l_mg->eline_meta[meta_line]; | |
1017 | ||
1018 | memset(line->smeta, 0, lm->smeta_len); | |
1019 | memset(line->emeta->buf, 0, lm->emeta_len[0]); | |
1020 | ||
1021 | line->emeta->mem = 0; | |
1022 | atomic_set(&line->emeta->sync, 0); | |
1023 | } | |
1024 | ||
a4bd217b JG |
1025 | /* For now lines are always assumed full lines. Thus, smeta former and current |
1026 | * lun bitmaps are omitted. | |
1027 | */ | |
dd2a4343 | 1028 | static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line, |
a4bd217b JG |
1029 | struct pblk_line *cur) |
1030 | { | |
1031 | struct nvm_tgt_dev *dev = pblk->dev; | |
1032 | struct nvm_geo *geo = &dev->geo; | |
1033 | struct pblk_line_meta *lm = &pblk->lm; | |
1034 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
dd2a4343 JG |
1035 | struct pblk_emeta *emeta = line->emeta; |
1036 | struct line_emeta *emeta_buf = emeta->buf; | |
1037 | struct line_smeta *smeta_buf = (struct line_smeta *)line->smeta; | |
a4bd217b JG |
1038 | int nr_blk_line; |
1039 | ||
1040 | /* After erasing the line, new bad blocks might appear and we risk | |
1041 | * having an invalid line | |
1042 | */ | |
1043 | nr_blk_line = lm->blk_per_line - | |
1044 | bitmap_weight(line->blk_bitmap, lm->blk_per_line); | |
1045 | if (nr_blk_line < lm->min_blk_line) { | |
1046 | spin_lock(&l_mg->free_lock); | |
1047 | spin_lock(&line->lock); | |
1048 | line->state = PBLK_LINESTATE_BAD; | |
f2937232 HH |
1049 | trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
1050 | line->state); | |
a4bd217b JG |
1051 | spin_unlock(&line->lock); |
1052 | ||
1053 | list_add_tail(&line->list, &l_mg->bad_list); | |
1054 | spin_unlock(&l_mg->free_lock); | |
1055 | ||
4e495a46 | 1056 | pblk_debug(pblk, "line %d is bad\n", line->id); |
a4bd217b JG |
1057 | |
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | /* Run-time metadata */ | |
dd2a4343 | 1062 | line->lun_bitmap = ((void *)(smeta_buf)) + sizeof(struct line_smeta); |
a4bd217b JG |
1063 | |
1064 | /* Mark LUNs allocated in this line (all for now) */ | |
1065 | bitmap_set(line->lun_bitmap, 0, lm->lun_bitmap_len); | |
1066 | ||
dd2a4343 JG |
1067 | smeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC); |
1068 | memcpy(smeta_buf->header.uuid, pblk->instance_uuid, 16); | |
1069 | smeta_buf->header.id = cpu_to_le32(line->id); | |
1070 | smeta_buf->header.type = cpu_to_le16(line->type); | |
d0ab0b1a HH |
1071 | smeta_buf->header.version_major = SMETA_VERSION_MAJOR; |
1072 | smeta_buf->header.version_minor = SMETA_VERSION_MINOR; | |
a4bd217b JG |
1073 | |
1074 | /* Start metadata */ | |
dd2a4343 | 1075 | smeta_buf->seq_nr = cpu_to_le64(line->seq_nr); |
fae7fae4 | 1076 | smeta_buf->window_wr_lun = cpu_to_le32(geo->all_luns); |
a4bd217b JG |
1077 | |
1078 | /* Fill metadata among lines */ | |
1079 | if (cur) { | |
1080 | memcpy(line->lun_bitmap, cur->lun_bitmap, lm->lun_bitmap_len); | |
dd2a4343 JG |
1081 | smeta_buf->prev_id = cpu_to_le32(cur->id); |
1082 | cur->emeta->buf->next_id = cpu_to_le32(line->id); | |
a4bd217b | 1083 | } else { |
dd2a4343 | 1084 | smeta_buf->prev_id = cpu_to_le32(PBLK_LINE_EMPTY); |
a4bd217b JG |
1085 | } |
1086 | ||
1087 | /* All smeta must be set at this point */ | |
dd2a4343 JG |
1088 | smeta_buf->header.crc = cpu_to_le32( |
1089 | pblk_calc_meta_header_crc(pblk, &smeta_buf->header)); | |
1090 | smeta_buf->crc = cpu_to_le32(pblk_calc_smeta_crc(pblk, smeta_buf)); | |
a4bd217b JG |
1091 | |
1092 | /* End metadata */ | |
dd2a4343 JG |
1093 | memcpy(&emeta_buf->header, &smeta_buf->header, |
1094 | sizeof(struct line_header)); | |
d0ab0b1a HH |
1095 | |
1096 | emeta_buf->header.version_major = EMETA_VERSION_MAJOR; | |
1097 | emeta_buf->header.version_minor = EMETA_VERSION_MINOR; | |
1098 | emeta_buf->header.crc = cpu_to_le32( | |
1099 | pblk_calc_meta_header_crc(pblk, &emeta_buf->header)); | |
1100 | ||
dd2a4343 JG |
1101 | emeta_buf->seq_nr = cpu_to_le64(line->seq_nr); |
1102 | emeta_buf->nr_lbas = cpu_to_le64(line->sec_in_line); | |
1103 | emeta_buf->nr_valid_lbas = cpu_to_le64(0); | |
1104 | emeta_buf->next_id = cpu_to_le32(PBLK_LINE_EMPTY); | |
1105 | emeta_buf->crc = cpu_to_le32(0); | |
1106 | emeta_buf->prev_id = smeta_buf->prev_id; | |
a4bd217b JG |
1107 | |
1108 | return 1; | |
1109 | } | |
1110 | ||
9cfd5a95 JG |
1111 | static int pblk_line_alloc_bitmaps(struct pblk *pblk, struct pblk_line *line) |
1112 | { | |
1113 | struct pblk_line_meta *lm = &pblk->lm; | |
53d82db6 | 1114 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
9cfd5a95 | 1115 | |
53d82db6 | 1116 | line->map_bitmap = mempool_alloc(l_mg->bitmap_pool, GFP_KERNEL); |
9cfd5a95 JG |
1117 | if (!line->map_bitmap) |
1118 | return -ENOMEM; | |
1119 | ||
53d82db6 HH |
1120 | memset(line->map_bitmap, 0, lm->sec_bitmap_len); |
1121 | ||
9cfd5a95 | 1122 | /* will be initialized using bb info from map_bitmap */ |
53d82db6 | 1123 | line->invalid_bitmap = mempool_alloc(l_mg->bitmap_pool, GFP_KERNEL); |
9cfd5a95 | 1124 | if (!line->invalid_bitmap) { |
53d82db6 | 1125 | mempool_free(line->map_bitmap, l_mg->bitmap_pool); |
9cfd5a95 JG |
1126 | line->map_bitmap = NULL; |
1127 | return -ENOMEM; | |
1128 | } | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
a4bd217b JG |
1133 | /* For now lines are always assumed full lines. Thus, smeta former and current |
1134 | * lun bitmaps are omitted. | |
1135 | */ | |
1136 | static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line, | |
1137 | int init) | |
1138 | { | |
1139 | struct nvm_tgt_dev *dev = pblk->dev; | |
1140 | struct nvm_geo *geo = &dev->geo; | |
1141 | struct pblk_line_meta *lm = &pblk->lm; | |
1142 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
a4bd217b JG |
1143 | u64 off; |
1144 | int bit = -1; | |
cfe1c9e2 | 1145 | int emeta_secs; |
a4bd217b JG |
1146 | |
1147 | line->sec_in_line = lm->sec_per_line; | |
1148 | ||
1149 | /* Capture bad block information on line mapping bitmaps */ | |
1150 | while ((bit = find_next_bit(line->blk_bitmap, lm->blk_per_line, | |
1151 | bit + 1)) < lm->blk_per_line) { | |
e46f4e48 | 1152 | off = bit * geo->ws_opt; |
a4bd217b JG |
1153 | bitmap_shift_left(l_mg->bb_aux, l_mg->bb_template, off, |
1154 | lm->sec_per_line); | |
1155 | bitmap_or(line->map_bitmap, line->map_bitmap, l_mg->bb_aux, | |
1156 | lm->sec_per_line); | |
e46f4e48 | 1157 | line->sec_in_line -= geo->clba; |
a4bd217b JG |
1158 | } |
1159 | ||
1160 | /* Mark smeta metadata sectors as bad sectors */ | |
1161 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
e46f4e48 | 1162 | off = bit * geo->ws_opt; |
a4bd217b JG |
1163 | bitmap_set(line->map_bitmap, off, lm->smeta_sec); |
1164 | line->sec_in_line -= lm->smeta_sec; | |
1165 | line->smeta_ssec = off; | |
1166 | line->cur_sec = off + lm->smeta_sec; | |
1167 | ||
af3fac16 | 1168 | if (init && pblk_line_smeta_write(pblk, line, off)) { |
4e495a46 | 1169 | pblk_debug(pblk, "line smeta I/O failed. Retry\n"); |
6cf17a2f | 1170 | return 0; |
a4bd217b JG |
1171 | } |
1172 | ||
1173 | bitmap_copy(line->invalid_bitmap, line->map_bitmap, lm->sec_per_line); | |
1174 | ||
1175 | /* Mark emeta metadata sectors as bad sectors. We need to consider bad | |
1176 | * blocks to make sure that there are enough sectors to store emeta | |
1177 | */ | |
cfe1c9e2 HH |
1178 | emeta_secs = lm->emeta_sec[0]; |
1179 | off = lm->sec_per_line; | |
1180 | while (emeta_secs) { | |
e46f4e48 | 1181 | off -= geo->ws_opt; |
a4bd217b | 1182 | if (!test_bit(off, line->invalid_bitmap)) { |
e46f4e48 JG |
1183 | bitmap_set(line->invalid_bitmap, off, geo->ws_opt); |
1184 | emeta_secs -= geo->ws_opt; | |
a4bd217b JG |
1185 | } |
1186 | } | |
1187 | ||
a4bd217b | 1188 | line->emeta_ssec = off; |
cfe1c9e2 | 1189 | line->sec_in_line -= lm->emeta_sec[0]; |
dd2a4343 | 1190 | line->nr_valid_lbas = 0; |
0880a9aa | 1191 | line->left_msecs = line->sec_in_line; |
dd2a4343 | 1192 | *line->vsc = cpu_to_le32(line->sec_in_line); |
a4bd217b JG |
1193 | |
1194 | if (lm->sec_per_line - line->sec_in_line != | |
1195 | bitmap_weight(line->invalid_bitmap, lm->sec_per_line)) { | |
1196 | spin_lock(&line->lock); | |
1197 | line->state = PBLK_LINESTATE_BAD; | |
f2937232 HH |
1198 | trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
1199 | line->state); | |
a4bd217b JG |
1200 | spin_unlock(&line->lock); |
1201 | ||
1202 | list_add_tail(&line->list, &l_mg->bad_list); | |
4e495a46 | 1203 | pblk_err(pblk, "unexpected line %d is bad\n", line->id); |
a4bd217b JG |
1204 | |
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | return 1; | |
1209 | } | |
1210 | ||
32ef9412 JG |
1211 | static int pblk_prepare_new_line(struct pblk *pblk, struct pblk_line *line) |
1212 | { | |
1213 | struct pblk_line_meta *lm = &pblk->lm; | |
1214 | struct nvm_tgt_dev *dev = pblk->dev; | |
1215 | struct nvm_geo *geo = &dev->geo; | |
1216 | int blk_to_erase = atomic_read(&line->blk_in_line); | |
1217 | int i; | |
1218 | ||
1219 | for (i = 0; i < lm->blk_per_line; i++) { | |
1220 | struct pblk_lun *rlun = &pblk->luns[i]; | |
1221 | int pos = pblk_ppa_to_pos(geo, rlun->bppa); | |
1222 | int state = line->chks[pos].state; | |
1223 | ||
1224 | /* Free chunks should not be erased */ | |
1225 | if (state & NVM_CHK_ST_FREE) { | |
1226 | set_bit(pblk_ppa_to_pos(geo, rlun->bppa), | |
1227 | line->erase_bitmap); | |
1228 | blk_to_erase--; | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | return blk_to_erase; | |
1233 | } | |
1234 | ||
a4bd217b JG |
1235 | static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line) |
1236 | { | |
1237 | struct pblk_line_meta *lm = &pblk->lm; | |
1d8b33e0 | 1238 | int blk_in_line = atomic_read(&line->blk_in_line); |
9cfd5a95 | 1239 | int blk_to_erase; |
a4bd217b | 1240 | |
32ef9412 JG |
1241 | /* Bad blocks do not need to be erased */ |
1242 | bitmap_copy(line->erase_bitmap, line->blk_bitmap, lm->blk_per_line); | |
1243 | ||
a4bd217b | 1244 | spin_lock(&line->lock); |
32ef9412 JG |
1245 | |
1246 | /* If we have not written to this line, we need to mark up free chunks | |
1247 | * as already erased | |
1248 | */ | |
1249 | if (line->state == PBLK_LINESTATE_NEW) { | |
1250 | blk_to_erase = pblk_prepare_new_line(pblk, line); | |
1251 | line->state = PBLK_LINESTATE_FREE; | |
f2937232 HH |
1252 | trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
1253 | line->state); | |
32ef9412 | 1254 | } else { |
1d8b33e0 JG |
1255 | blk_to_erase = blk_in_line; |
1256 | } | |
1257 | ||
1258 | if (blk_in_line < lm->min_blk_line) { | |
9cfd5a95 JG |
1259 | spin_unlock(&line->lock); |
1260 | return -EAGAIN; | |
32ef9412 JG |
1261 | } |
1262 | ||
a4bd217b | 1263 | if (line->state != PBLK_LINESTATE_FREE) { |
588726d3 JG |
1264 | WARN(1, "pblk: corrupted line %d, state %d\n", |
1265 | line->id, line->state); | |
9cfd5a95 JG |
1266 | spin_unlock(&line->lock); |
1267 | return -EINTR; | |
a4bd217b | 1268 | } |
588726d3 | 1269 | |
a4bd217b | 1270 | line->state = PBLK_LINESTATE_OPEN; |
f2937232 HH |
1271 | trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
1272 | line->state); | |
a44f53fa | 1273 | |
32ef9412 JG |
1274 | atomic_set(&line->left_eblks, blk_to_erase); |
1275 | atomic_set(&line->left_seblks, blk_to_erase); | |
dd2a4343 JG |
1276 | |
1277 | line->meta_distance = lm->meta_distance; | |
a4bd217b JG |
1278 | spin_unlock(&line->lock); |
1279 | ||
a4bd217b JG |
1280 | kref_init(&line->ref); |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
361d889f | 1285 | /* Line allocations in the recovery path are always single threaded */ |
a4bd217b JG |
1286 | int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line) |
1287 | { | |
1288 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1289 | int ret; | |
1290 | ||
1291 | spin_lock(&l_mg->free_lock); | |
1292 | l_mg->data_line = line; | |
1293 | list_del(&line->list); | |
a4bd217b JG |
1294 | |
1295 | ret = pblk_line_prepare(pblk, line); | |
1296 | if (ret) { | |
1297 | list_add(&line->list, &l_mg->free_list); | |
3dc001f3 | 1298 | spin_unlock(&l_mg->free_lock); |
a4bd217b JG |
1299 | return ret; |
1300 | } | |
3dc001f3 | 1301 | spin_unlock(&l_mg->free_lock); |
a4bd217b | 1302 | |
9cfd5a95 JG |
1303 | ret = pblk_line_alloc_bitmaps(pblk, line); |
1304 | if (ret) | |
fde201a4 | 1305 | goto fail; |
a4bd217b JG |
1306 | |
1307 | if (!pblk_line_init_bb(pblk, line, 0)) { | |
fde201a4 HS |
1308 | ret = -EINTR; |
1309 | goto fail; | |
a4bd217b JG |
1310 | } |
1311 | ||
9cfd5a95 | 1312 | pblk_rl_free_lines_dec(&pblk->rl, line, true); |
a4bd217b | 1313 | return 0; |
fde201a4 HS |
1314 | |
1315 | fail: | |
1316 | spin_lock(&l_mg->free_lock); | |
1317 | list_add(&line->list, &l_mg->free_list); | |
1318 | spin_unlock(&l_mg->free_lock); | |
1319 | ||
1320 | return ret; | |
a4bd217b JG |
1321 | } |
1322 | ||
1323 | void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line) | |
1324 | { | |
53d82db6 HH |
1325 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
1326 | ||
1327 | mempool_free(line->map_bitmap, l_mg->bitmap_pool); | |
a4bd217b JG |
1328 | line->map_bitmap = NULL; |
1329 | line->smeta = NULL; | |
1330 | line->emeta = NULL; | |
1331 | } | |
1332 | ||
9cfd5a95 JG |
1333 | static void pblk_line_reinit(struct pblk_line *line) |
1334 | { | |
1335 | *line->vsc = cpu_to_le32(EMPTY_ENTRY); | |
1336 | ||
1337 | line->map_bitmap = NULL; | |
1338 | line->invalid_bitmap = NULL; | |
1339 | line->smeta = NULL; | |
1340 | line->emeta = NULL; | |
1341 | } | |
1342 | ||
1343 | void pblk_line_free(struct pblk_line *line) | |
1344 | { | |
53d82db6 HH |
1345 | struct pblk *pblk = line->pblk; |
1346 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1347 | ||
1348 | mempool_free(line->map_bitmap, l_mg->bitmap_pool); | |
1349 | mempool_free(line->invalid_bitmap, l_mg->bitmap_pool); | |
9cfd5a95 JG |
1350 | |
1351 | pblk_line_reinit(line); | |
1352 | } | |
1353 | ||
a4bd217b JG |
1354 | struct pblk_line *pblk_line_get(struct pblk *pblk) |
1355 | { | |
1356 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1357 | struct pblk_line_meta *lm = &pblk->lm; | |
588726d3 JG |
1358 | struct pblk_line *line; |
1359 | int ret, bit; | |
a4bd217b JG |
1360 | |
1361 | lockdep_assert_held(&l_mg->free_lock); | |
1362 | ||
588726d3 | 1363 | retry: |
a4bd217b | 1364 | if (list_empty(&l_mg->free_list)) { |
4e495a46 | 1365 | pblk_err(pblk, "no free lines\n"); |
588726d3 | 1366 | return NULL; |
a4bd217b JG |
1367 | } |
1368 | ||
1369 | line = list_first_entry(&l_mg->free_list, struct pblk_line, list); | |
1370 | list_del(&line->list); | |
1371 | l_mg->nr_free_lines--; | |
1372 | ||
1373 | bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line); | |
1374 | if (unlikely(bit >= lm->blk_per_line)) { | |
1375 | spin_lock(&line->lock); | |
1376 | line->state = PBLK_LINESTATE_BAD; | |
f2937232 HH |
1377 | trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
1378 | line->state); | |
a4bd217b JG |
1379 | spin_unlock(&line->lock); |
1380 | ||
1381 | list_add_tail(&line->list, &l_mg->bad_list); | |
1382 | ||
4e495a46 | 1383 | pblk_debug(pblk, "line %d is bad\n", line->id); |
588726d3 | 1384 | goto retry; |
a4bd217b JG |
1385 | } |
1386 | ||
588726d3 JG |
1387 | ret = pblk_line_prepare(pblk, line); |
1388 | if (ret) { | |
1d8b33e0 JG |
1389 | switch (ret) { |
1390 | case -EAGAIN: | |
1391 | list_add(&line->list, &l_mg->bad_list); | |
1392 | goto retry; | |
1393 | case -EINTR: | |
588726d3 JG |
1394 | list_add(&line->list, &l_mg->corrupt_list); |
1395 | goto retry; | |
1d8b33e0 | 1396 | default: |
4e495a46 | 1397 | pblk_err(pblk, "failed to prepare line %d\n", line->id); |
588726d3 JG |
1398 | list_add(&line->list, &l_mg->free_list); |
1399 | l_mg->nr_free_lines++; | |
1400 | return NULL; | |
1401 | } | |
a4bd217b JG |
1402 | } |
1403 | ||
a4bd217b JG |
1404 | return line; |
1405 | } | |
1406 | ||
1407 | static struct pblk_line *pblk_line_retry(struct pblk *pblk, | |
1408 | struct pblk_line *line) | |
1409 | { | |
1410 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1411 | struct pblk_line *retry_line; | |
1412 | ||
588726d3 | 1413 | retry: |
a4bd217b JG |
1414 | spin_lock(&l_mg->free_lock); |
1415 | retry_line = pblk_line_get(pblk); | |
1416 | if (!retry_line) { | |
be388d9f | 1417 | l_mg->data_line = NULL; |
a4bd217b JG |
1418 | spin_unlock(&l_mg->free_lock); |
1419 | return NULL; | |
1420 | } | |
1421 | ||
9cfd5a95 JG |
1422 | retry_line->map_bitmap = line->map_bitmap; |
1423 | retry_line->invalid_bitmap = line->invalid_bitmap; | |
a4bd217b JG |
1424 | retry_line->smeta = line->smeta; |
1425 | retry_line->emeta = line->emeta; | |
1426 | retry_line->meta_line = line->meta_line; | |
a4bd217b | 1427 | |
9cfd5a95 JG |
1428 | pblk_line_reinit(line); |
1429 | ||
3dc001f3 | 1430 | l_mg->data_line = retry_line; |
a4bd217b JG |
1431 | spin_unlock(&l_mg->free_lock); |
1432 | ||
a7689938 | 1433 | pblk_rl_free_lines_dec(&pblk->rl, line, false); |
a4bd217b | 1434 | |
588726d3 JG |
1435 | if (pblk_line_erase(pblk, retry_line)) |
1436 | goto retry; | |
1437 | ||
a4bd217b JG |
1438 | return retry_line; |
1439 | } | |
1440 | ||
588726d3 JG |
1441 | static void pblk_set_space_limit(struct pblk *pblk) |
1442 | { | |
1443 | struct pblk_rl *rl = &pblk->rl; | |
1444 | ||
1445 | atomic_set(&rl->rb_space, 0); | |
1446 | } | |
1447 | ||
a4bd217b JG |
1448 | struct pblk_line *pblk_line_get_first_data(struct pblk *pblk) |
1449 | { | |
1450 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1451 | struct pblk_line *line; | |
a4bd217b JG |
1452 | |
1453 | spin_lock(&l_mg->free_lock); | |
1454 | line = pblk_line_get(pblk); | |
1455 | if (!line) { | |
1456 | spin_unlock(&l_mg->free_lock); | |
1457 | return NULL; | |
1458 | } | |
1459 | ||
1460 | line->seq_nr = l_mg->d_seq_nr++; | |
1461 | line->type = PBLK_LINETYPE_DATA; | |
1462 | l_mg->data_line = line; | |
1463 | ||
dd2a4343 | 1464 | pblk_line_setup_metadata(line, l_mg, &pblk->lm); |
a4bd217b JG |
1465 | |
1466 | /* Allocate next line for preparation */ | |
1467 | l_mg->data_next = pblk_line_get(pblk); | |
588726d3 JG |
1468 | if (!l_mg->data_next) { |
1469 | /* If we cannot get a new line, we need to stop the pipeline. | |
1470 | * Only allow as many writes in as we can store safely and then | |
1471 | * fail gracefully | |
1472 | */ | |
1473 | pblk_set_space_limit(pblk); | |
1474 | ||
1475 | l_mg->data_next = NULL; | |
1476 | } else { | |
a4bd217b JG |
1477 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; |
1478 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
a4bd217b JG |
1479 | } |
1480 | spin_unlock(&l_mg->free_lock); | |
1481 | ||
9cfd5a95 JG |
1482 | if (pblk_line_alloc_bitmaps(pblk, line)) |
1483 | return NULL; | |
1484 | ||
588726d3 JG |
1485 | if (pblk_line_erase(pblk, line)) { |
1486 | line = pblk_line_retry(pblk, line); | |
1487 | if (!line) | |
1488 | return NULL; | |
1489 | } | |
1490 | ||
a4bd217b | 1491 | retry_setup: |
dd2a4343 | 1492 | if (!pblk_line_init_metadata(pblk, line, NULL)) { |
a4bd217b JG |
1493 | line = pblk_line_retry(pblk, line); |
1494 | if (!line) | |
1495 | return NULL; | |
1496 | ||
1497 | goto retry_setup; | |
1498 | } | |
1499 | ||
1500 | if (!pblk_line_init_bb(pblk, line, 1)) { | |
1501 | line = pblk_line_retry(pblk, line); | |
1502 | if (!line) | |
1503 | return NULL; | |
1504 | ||
1505 | goto retry_setup; | |
1506 | } | |
1507 | ||
a7689938 JG |
1508 | pblk_rl_free_lines_dec(&pblk->rl, line, true); |
1509 | ||
a4bd217b JG |
1510 | return line; |
1511 | } | |
1512 | ||
ae14cc04 MB |
1513 | void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa) |
1514 | { | |
1515 | struct pblk_line *line; | |
1516 | ||
cb21665c | 1517 | line = pblk_ppa_to_line(pblk, ppa); |
ae14cc04 MB |
1518 | kref_put(&line->ref, pblk_line_put_wq); |
1519 | } | |
1520 | ||
1521 | void pblk_rq_to_line_put(struct pblk *pblk, struct nvm_rq *rqd) | |
1522 | { | |
1523 | struct ppa_addr *ppa_list; | |
1524 | int i; | |
1525 | ||
1526 | ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr; | |
1527 | ||
1528 | for (i = 0; i < rqd->nr_ppas; i++) | |
1529 | pblk_ppa_to_line_put(pblk, ppa_list[i]); | |
1530 | } | |
1531 | ||
588726d3 JG |
1532 | static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line) |
1533 | { | |
1534 | lockdep_assert_held(&pblk->l_mg.free_lock); | |
1535 | ||
1536 | pblk_set_space_limit(pblk); | |
1537 | pblk->state = PBLK_STATE_STOPPING; | |
1b0dd0bf | 1538 | trace_pblk_state(pblk_disk_name(pblk), pblk->state); |
588726d3 JG |
1539 | } |
1540 | ||
8bd40020 JG |
1541 | static void pblk_line_close_meta_sync(struct pblk *pblk) |
1542 | { | |
1543 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1544 | struct pblk_line_meta *lm = &pblk->lm; | |
1545 | struct pblk_line *line, *tline; | |
1546 | LIST_HEAD(list); | |
1547 | ||
1548 | spin_lock(&l_mg->close_lock); | |
1549 | if (list_empty(&l_mg->emeta_list)) { | |
1550 | spin_unlock(&l_mg->close_lock); | |
1551 | return; | |
1552 | } | |
1553 | ||
1554 | list_cut_position(&list, &l_mg->emeta_list, l_mg->emeta_list.prev); | |
1555 | spin_unlock(&l_mg->close_lock); | |
1556 | ||
1557 | list_for_each_entry_safe(line, tline, &list, list) { | |
1558 | struct pblk_emeta *emeta = line->emeta; | |
1559 | ||
1560 | while (emeta->mem < lm->emeta_len[0]) { | |
1561 | int ret; | |
1562 | ||
1563 | ret = pblk_submit_meta_io(pblk, line); | |
1564 | if (ret) { | |
4e495a46 | 1565 | pblk_err(pblk, "sync meta line %d failed (%d)\n", |
8bd40020 JG |
1566 | line->id, ret); |
1567 | return; | |
1568 | } | |
1569 | } | |
1570 | } | |
1571 | ||
1572 | pblk_wait_for_meta(pblk); | |
1573 | flush_workqueue(pblk->close_wq); | |
1574 | } | |
1575 | ||
a7c9e910 | 1576 | void __pblk_pipeline_flush(struct pblk *pblk) |
588726d3 JG |
1577 | { |
1578 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1579 | int ret; | |
1580 | ||
1581 | spin_lock(&l_mg->free_lock); | |
1582 | if (pblk->state == PBLK_STATE_RECOVERING || | |
1583 | pblk->state == PBLK_STATE_STOPPED) { | |
1584 | spin_unlock(&l_mg->free_lock); | |
1585 | return; | |
1586 | } | |
1587 | pblk->state = PBLK_STATE_RECOVERING; | |
1b0dd0bf | 1588 | trace_pblk_state(pblk_disk_name(pblk), pblk->state); |
588726d3 JG |
1589 | spin_unlock(&l_mg->free_lock); |
1590 | ||
1591 | pblk_flush_writer(pblk); | |
1592 | pblk_wait_for_meta(pblk); | |
1593 | ||
1594 | ret = pblk_recov_pad(pblk); | |
1595 | if (ret) { | |
4e495a46 | 1596 | pblk_err(pblk, "could not close data on teardown(%d)\n", ret); |
588726d3 JG |
1597 | return; |
1598 | } | |
1599 | ||
ee8d5c1a | 1600 | flush_workqueue(pblk->bb_wq); |
588726d3 | 1601 | pblk_line_close_meta_sync(pblk); |
a7c9e910 JG |
1602 | } |
1603 | ||
1604 | void __pblk_pipeline_stop(struct pblk *pblk) | |
1605 | { | |
1606 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
588726d3 JG |
1607 | |
1608 | spin_lock(&l_mg->free_lock); | |
1609 | pblk->state = PBLK_STATE_STOPPED; | |
1b0dd0bf | 1610 | trace_pblk_state(pblk_disk_name(pblk), pblk->state); |
588726d3 JG |
1611 | l_mg->data_line = NULL; |
1612 | l_mg->data_next = NULL; | |
1613 | spin_unlock(&l_mg->free_lock); | |
1614 | } | |
1615 | ||
a7c9e910 JG |
1616 | void pblk_pipeline_stop(struct pblk *pblk) |
1617 | { | |
1618 | __pblk_pipeline_flush(pblk); | |
1619 | __pblk_pipeline_stop(pblk); | |
1620 | } | |
1621 | ||
21d22871 | 1622 | struct pblk_line *pblk_line_replace_data(struct pblk *pblk) |
a4bd217b | 1623 | { |
a4bd217b | 1624 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
21d22871 | 1625 | struct pblk_line *cur, *new = NULL; |
a4bd217b | 1626 | unsigned int left_seblks; |
a4bd217b | 1627 | |
a4bd217b JG |
1628 | new = l_mg->data_next; |
1629 | if (!new) | |
21d22871 | 1630 | goto out; |
a4bd217b | 1631 | |
588726d3 | 1632 | spin_lock(&l_mg->free_lock); |
44cdbdc6 JG |
1633 | cur = l_mg->data_line; |
1634 | l_mg->data_line = new; | |
1635 | ||
588726d3 JG |
1636 | pblk_line_setup_metadata(new, l_mg, &pblk->lm); |
1637 | spin_unlock(&l_mg->free_lock); | |
1638 | ||
1639 | retry_erase: | |
a4bd217b JG |
1640 | left_seblks = atomic_read(&new->left_seblks); |
1641 | if (left_seblks) { | |
1642 | /* If line is not fully erased, erase it */ | |
a44f53fa | 1643 | if (atomic_read(&new->left_eblks)) { |
a4bd217b | 1644 | if (pblk_line_erase(pblk, new)) |
21d22871 | 1645 | goto out; |
a4bd217b JG |
1646 | } else { |
1647 | io_schedule(); | |
1648 | } | |
588726d3 | 1649 | goto retry_erase; |
a4bd217b JG |
1650 | } |
1651 | ||
9cfd5a95 JG |
1652 | if (pblk_line_alloc_bitmaps(pblk, new)) |
1653 | return NULL; | |
1654 | ||
a4bd217b | 1655 | retry_setup: |
dd2a4343 | 1656 | if (!pblk_line_init_metadata(pblk, new, cur)) { |
a4bd217b | 1657 | new = pblk_line_retry(pblk, new); |
f3236cef | 1658 | if (!new) |
21d22871 | 1659 | goto out; |
a4bd217b JG |
1660 | |
1661 | goto retry_setup; | |
1662 | } | |
1663 | ||
1664 | if (!pblk_line_init_bb(pblk, new, 1)) { | |
1665 | new = pblk_line_retry(pblk, new); | |
1666 | if (!new) | |
21d22871 | 1667 | goto out; |
a4bd217b JG |
1668 | |
1669 | goto retry_setup; | |
1670 | } | |
1671 | ||
a7689938 JG |
1672 | pblk_rl_free_lines_dec(&pblk->rl, new, true); |
1673 | ||
588726d3 JG |
1674 | /* Allocate next line for preparation */ |
1675 | spin_lock(&l_mg->free_lock); | |
1676 | l_mg->data_next = pblk_line_get(pblk); | |
1677 | if (!l_mg->data_next) { | |
1678 | /* If we cannot get a new line, we need to stop the pipeline. | |
1679 | * Only allow as many writes in as we can store safely and then | |
1680 | * fail gracefully | |
1681 | */ | |
1682 | pblk_stop_writes(pblk, new); | |
1683 | l_mg->data_next = NULL; | |
1684 | } else { | |
1685 | l_mg->data_next->seq_nr = l_mg->d_seq_nr++; | |
1686 | l_mg->data_next->type = PBLK_LINETYPE_DATA; | |
588726d3 JG |
1687 | } |
1688 | spin_unlock(&l_mg->free_lock); | |
1689 | ||
21d22871 JG |
1690 | out: |
1691 | return new; | |
a4bd217b JG |
1692 | } |
1693 | ||
7bd4d370 | 1694 | static void __pblk_line_put(struct pblk *pblk, struct pblk_line *line) |
a4bd217b | 1695 | { |
a4bd217b | 1696 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
d6b992f7 | 1697 | struct pblk_gc *gc = &pblk->gc; |
a4bd217b JG |
1698 | |
1699 | spin_lock(&line->lock); | |
1700 | WARN_ON(line->state != PBLK_LINESTATE_GC); | |
1701 | line->state = PBLK_LINESTATE_FREE; | |
f2937232 HH |
1702 | trace_pblk_line_state(pblk_disk_name(pblk), line->id, |
1703 | line->state); | |
a4bd217b | 1704 | line->gc_group = PBLK_LINEGC_NONE; |
8e55c07b | 1705 | pblk_line_free(line); |
a4bd217b | 1706 | |
48b8d208 HH |
1707 | if (line->w_err_gc->has_write_err) { |
1708 | pblk_rl_werr_line_out(&pblk->rl); | |
1709 | line->w_err_gc->has_write_err = 0; | |
1710 | } | |
1711 | ||
1712 | spin_unlock(&line->lock); | |
d6b992f7 HH |
1713 | atomic_dec(&gc->pipeline_gc); |
1714 | ||
a4bd217b JG |
1715 | spin_lock(&l_mg->free_lock); |
1716 | list_add_tail(&line->list, &l_mg->free_list); | |
1717 | l_mg->nr_free_lines++; | |
1718 | spin_unlock(&l_mg->free_lock); | |
1719 | ||
1720 | pblk_rl_free_lines_inc(&pblk->rl, line); | |
1721 | } | |
1722 | ||
7bd4d370 JG |
1723 | static void pblk_line_put_ws(struct work_struct *work) |
1724 | { | |
1725 | struct pblk_line_ws *line_put_ws = container_of(work, | |
1726 | struct pblk_line_ws, ws); | |
1727 | struct pblk *pblk = line_put_ws->pblk; | |
1728 | struct pblk_line *line = line_put_ws->line; | |
1729 | ||
1730 | __pblk_line_put(pblk, line); | |
b906bbb6 | 1731 | mempool_free(line_put_ws, &pblk->gen_ws_pool); |
7bd4d370 JG |
1732 | } |
1733 | ||
1734 | void pblk_line_put(struct kref *ref) | |
1735 | { | |
1736 | struct pblk_line *line = container_of(ref, struct pblk_line, ref); | |
1737 | struct pblk *pblk = line->pblk; | |
1738 | ||
1739 | __pblk_line_put(pblk, line); | |
1740 | } | |
1741 | ||
1742 | void pblk_line_put_wq(struct kref *ref) | |
1743 | { | |
1744 | struct pblk_line *line = container_of(ref, struct pblk_line, ref); | |
1745 | struct pblk *pblk = line->pblk; | |
1746 | struct pblk_line_ws *line_put_ws; | |
1747 | ||
b906bbb6 | 1748 | line_put_ws = mempool_alloc(&pblk->gen_ws_pool, GFP_ATOMIC); |
7bd4d370 JG |
1749 | if (!line_put_ws) |
1750 | return; | |
1751 | ||
1752 | line_put_ws->pblk = pblk; | |
1753 | line_put_ws->line = line; | |
1754 | line_put_ws->priv = NULL; | |
1755 | ||
1756 | INIT_WORK(&line_put_ws->ws, pblk_line_put_ws); | |
1757 | queue_work(pblk->r_end_wq, &line_put_ws->ws); | |
1758 | } | |
1759 | ||
a4bd217b JG |
1760 | int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa) |
1761 | { | |
1762 | struct nvm_rq *rqd; | |
1763 | int err; | |
1764 | ||
67bf26a3 | 1765 | rqd = pblk_alloc_rqd(pblk, PBLK_ERASE); |
a4bd217b JG |
1766 | |
1767 | pblk_setup_e_rq(pblk, rqd, ppa); | |
1768 | ||
1769 | rqd->end_io = pblk_end_io_erase; | |
1770 | rqd->private = pblk; | |
1771 | ||
4209c31c HH |
1772 | trace_pblk_chunk_reset(pblk_disk_name(pblk), |
1773 | &ppa, PBLK_CHUNK_RESET_START); | |
1774 | ||
a4bd217b JG |
1775 | /* The write thread schedules erases so that it minimizes disturbances |
1776 | * with writes. Thus, there is no need to take the LUN semaphore. | |
1777 | */ | |
1778 | err = pblk_submit_io(pblk, rqd); | |
1779 | if (err) { | |
1780 | struct nvm_tgt_dev *dev = pblk->dev; | |
1781 | struct nvm_geo *geo = &dev->geo; | |
1782 | ||
4e495a46 | 1783 | pblk_err(pblk, "could not async erase line:%d,blk:%d\n", |
cb21665c | 1784 | pblk_ppa_to_line_id(ppa), |
b1bcfda1 | 1785 | pblk_ppa_to_pos(geo, ppa)); |
a4bd217b JG |
1786 | } |
1787 | ||
1788 | return err; | |
1789 | } | |
1790 | ||
1791 | struct pblk_line *pblk_line_get_data(struct pblk *pblk) | |
1792 | { | |
1793 | return pblk->l_mg.data_line; | |
1794 | } | |
1795 | ||
d624f371 JG |
1796 | /* For now, always erase next line */ |
1797 | struct pblk_line *pblk_line_get_erase(struct pblk *pblk) | |
a4bd217b JG |
1798 | { |
1799 | return pblk->l_mg.data_next; | |
1800 | } | |
1801 | ||
1802 | int pblk_line_is_full(struct pblk_line *line) | |
1803 | { | |
1804 | return (line->left_msecs == 0); | |
1805 | } | |
1806 | ||
588726d3 JG |
1807 | static void pblk_line_should_sync_meta(struct pblk *pblk) |
1808 | { | |
1809 | if (pblk_rl_is_limit(&pblk->rl)) | |
1810 | pblk_line_close_meta_sync(pblk); | |
1811 | } | |
1812 | ||
a4bd217b JG |
1813 | void pblk_line_close(struct pblk *pblk, struct pblk_line *line) |
1814 | { | |
32ef9412 JG |
1815 | struct nvm_tgt_dev *dev = pblk->dev; |
1816 | struct nvm_geo *geo = &dev->geo; | |
1817 | struct pblk_line_meta *lm = &pblk->lm; | |
a4bd217b JG |
1818 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
1819 | struct list_head *move_list; | |
32ef9412 | 1820 | int i; |
a4bd217b | 1821 | |
880eda54 | 1822 | #ifdef CONFIG_NVM_PBLK_DEBUG |
dd2a4343 | 1823 | WARN(!bitmap_full(line->map_bitmap, lm->sec_per_line), |
a4bd217b | 1824 | "pblk: corrupt closed line %d\n", line->id); |
a84ebb83 | 1825 | #endif |
a4bd217b JG |
1826 | |
1827 | spin_lock(&l_mg->free_lock); | |
1828 | WARN_ON(!test_and_clear_bit(line->meta_line, &l_mg->meta_bitmap)); | |
1829 | spin_unlock(&l_mg->free_lock); | |
1830 | ||
1831 | spin_lock(&l_mg->gc_lock); | |
1832 | spin_lock(&line->lock); | |
1833 | WARN_ON(line->state != PBLK_LINESTATE_OPEN); | |
1834 | line->state = PBLK_LINESTATE_CLOSED; | |
1835 | move_list = pblk_line_gc_list(pblk, line); | |
a4bd217b JG |
1836 | list_add_tail(&line->list, move_list); |
1837 | ||
53d82db6 | 1838 | mempool_free(line->map_bitmap, l_mg->bitmap_pool); |
a4bd217b JG |
1839 | line->map_bitmap = NULL; |
1840 | line->smeta = NULL; | |
1841 | line->emeta = NULL; | |
1842 | ||
32ef9412 JG |
1843 | for (i = 0; i < lm->blk_per_line; i++) { |
1844 | struct pblk_lun *rlun = &pblk->luns[i]; | |
1845 | int pos = pblk_ppa_to_pos(geo, rlun->bppa); | |
1846 | int state = line->chks[pos].state; | |
1847 | ||
1848 | if (!(state & NVM_CHK_ST_OFFLINE)) | |
1849 | state = NVM_CHK_ST_CLOSED; | |
1850 | } | |
1851 | ||
a4bd217b JG |
1852 | spin_unlock(&line->lock); |
1853 | spin_unlock(&l_mg->gc_lock); | |
f2937232 HH |
1854 | |
1855 | trace_pblk_line_state(pblk_disk_name(pblk), line->id, | |
1856 | line->state); | |
a4bd217b JG |
1857 | } |
1858 | ||
dd2a4343 JG |
1859 | void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line) |
1860 | { | |
1861 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1862 | struct pblk_line_meta *lm = &pblk->lm; | |
1863 | struct pblk_emeta *emeta = line->emeta; | |
1864 | struct line_emeta *emeta_buf = emeta->buf; | |
76758390 | 1865 | struct wa_counters *wa = emeta_to_wa(lm, emeta_buf); |
dd2a4343 | 1866 | |
588726d3 | 1867 | /* No need for exact vsc value; avoid a big line lock and take aprox. */ |
dd2a4343 JG |
1868 | memcpy(emeta_to_vsc(pblk, emeta_buf), l_mg->vsc_list, lm->vsc_list_len); |
1869 | memcpy(emeta_to_bb(emeta_buf), line->blk_bitmap, lm->blk_bitmap_len); | |
1870 | ||
76758390 HH |
1871 | wa->user = cpu_to_le64(atomic64_read(&pblk->user_wa)); |
1872 | wa->pad = cpu_to_le64(atomic64_read(&pblk->pad_wa)); | |
1873 | wa->gc = cpu_to_le64(atomic64_read(&pblk->gc_wa)); | |
1874 | ||
9cc85bc7 JG |
1875 | if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) { |
1876 | emeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC); | |
1877 | memcpy(emeta_buf->header.uuid, pblk->instance_uuid, 16); | |
1878 | emeta_buf->header.id = cpu_to_le32(line->id); | |
1879 | emeta_buf->header.type = cpu_to_le16(line->type); | |
1880 | emeta_buf->header.version_major = EMETA_VERSION_MAJOR; | |
1881 | emeta_buf->header.version_minor = EMETA_VERSION_MINOR; | |
1882 | emeta_buf->header.crc = cpu_to_le32( | |
1883 | pblk_calc_meta_header_crc(pblk, &emeta_buf->header)); | |
1884 | } | |
1885 | ||
dd2a4343 JG |
1886 | emeta_buf->nr_valid_lbas = cpu_to_le64(line->nr_valid_lbas); |
1887 | emeta_buf->crc = cpu_to_le32(pblk_calc_emeta_crc(pblk, emeta_buf)); | |
1888 | ||
1889 | spin_lock(&l_mg->close_lock); | |
1890 | spin_lock(&line->lock); | |
48b8d208 HH |
1891 | |
1892 | /* Update the in-memory start address for emeta, in case it has | |
1893 | * shifted due to write errors | |
1894 | */ | |
1895 | if (line->emeta_ssec != line->cur_sec) | |
1896 | line->emeta_ssec = line->cur_sec; | |
1897 | ||
dd2a4343 JG |
1898 | list_add_tail(&line->list, &l_mg->emeta_list); |
1899 | spin_unlock(&line->lock); | |
1900 | spin_unlock(&l_mg->close_lock); | |
588726d3 JG |
1901 | |
1902 | pblk_line_should_sync_meta(pblk); | |
48b8d208 HH |
1903 | } |
1904 | ||
1905 | static void pblk_save_lba_list(struct pblk *pblk, struct pblk_line *line) | |
1906 | { | |
1907 | struct pblk_line_meta *lm = &pblk->lm; | |
1908 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
1909 | unsigned int lba_list_size = lm->emeta_len[2]; | |
1910 | struct pblk_w_err_gc *w_err_gc = line->w_err_gc; | |
1911 | struct pblk_emeta *emeta = line->emeta; | |
1912 | ||
1913 | w_err_gc->lba_list = pblk_malloc(lba_list_size, | |
1914 | l_mg->emeta_alloc_type, GFP_KERNEL); | |
1915 | memcpy(w_err_gc->lba_list, emeta_to_lbas(pblk, emeta->buf), | |
1916 | lba_list_size); | |
dd2a4343 JG |
1917 | } |
1918 | ||
a4bd217b JG |
1919 | void pblk_line_close_ws(struct work_struct *work) |
1920 | { | |
1921 | struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws, | |
1922 | ws); | |
1923 | struct pblk *pblk = line_ws->pblk; | |
1924 | struct pblk_line *line = line_ws->line; | |
48b8d208 HH |
1925 | struct pblk_w_err_gc *w_err_gc = line->w_err_gc; |
1926 | ||
1927 | /* Write errors makes the emeta start address stored in smeta invalid, | |
1928 | * so keep a copy of the lba list until we've gc'd the line | |
1929 | */ | |
1930 | if (w_err_gc->has_write_err) | |
1931 | pblk_save_lba_list(pblk, line); | |
a4bd217b JG |
1932 | |
1933 | pblk_line_close(pblk, line); | |
b906bbb6 | 1934 | mempool_free(line_ws, &pblk->gen_ws_pool); |
a4bd217b JG |
1935 | } |
1936 | ||
b84ae4a8 JG |
1937 | void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv, |
1938 | void (*work)(struct work_struct *), gfp_t gfp_mask, | |
ef576494 | 1939 | struct workqueue_struct *wq) |
a4bd217b JG |
1940 | { |
1941 | struct pblk_line_ws *line_ws; | |
1942 | ||
b906bbb6 | 1943 | line_ws = mempool_alloc(&pblk->gen_ws_pool, gfp_mask); |
a4bd217b JG |
1944 | |
1945 | line_ws->pblk = pblk; | |
1946 | line_ws->line = line; | |
1947 | line_ws->priv = priv; | |
1948 | ||
1949 | INIT_WORK(&line_ws->ws, work); | |
ef576494 | 1950 | queue_work(wq, &line_ws->ws); |
a4bd217b JG |
1951 | } |
1952 | ||
43241cfe | 1953 | static void __pblk_down_chunk(struct pblk *pblk, int pos) |
a4bd217b | 1954 | { |
3eaa11e2 | 1955 | struct pblk_lun *rlun = &pblk->luns[pos]; |
a4bd217b JG |
1956 | int ret; |
1957 | ||
1958 | /* | |
1959 | * Only send one inflight I/O per LUN. Since we map at a page | |
1960 | * granurality, all ppas in the I/O will map to the same LUN | |
1961 | */ | |
a4bd217b | 1962 | |
3eaa11e2 | 1963 | ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000)); |
c5493845 | 1964 | if (ret == -ETIME || ret == -EINTR) |
4e495a46 MB |
1965 | pblk_err(pblk, "taking lun semaphore timed out: err %d\n", |
1966 | -ret); | |
a4bd217b JG |
1967 | } |
1968 | ||
43241cfe | 1969 | void pblk_down_chunk(struct pblk *pblk, struct ppa_addr ppa) |
3eaa11e2 JG |
1970 | { |
1971 | struct nvm_tgt_dev *dev = pblk->dev; | |
1972 | struct nvm_geo *geo = &dev->geo; | |
43241cfe | 1973 | int pos = pblk_ppa_to_pos(geo, ppa); |
3eaa11e2 | 1974 | |
43241cfe | 1975 | __pblk_down_chunk(pblk, pos); |
3eaa11e2 JG |
1976 | } |
1977 | ||
43241cfe | 1978 | void pblk_down_rq(struct pblk *pblk, struct ppa_addr ppa, |
3eaa11e2 JG |
1979 | unsigned long *lun_bitmap) |
1980 | { | |
1981 | struct nvm_tgt_dev *dev = pblk->dev; | |
1982 | struct nvm_geo *geo = &dev->geo; | |
43241cfe | 1983 | int pos = pblk_ppa_to_pos(geo, ppa); |
3eaa11e2 JG |
1984 | |
1985 | /* If the LUN has been locked for this same request, do no attempt to | |
1986 | * lock it again | |
1987 | */ | |
1988 | if (test_and_set_bit(pos, lun_bitmap)) | |
1989 | return; | |
1990 | ||
43241cfe | 1991 | __pblk_down_chunk(pblk, pos); |
3eaa11e2 JG |
1992 | } |
1993 | ||
43241cfe | 1994 | void pblk_up_chunk(struct pblk *pblk, struct ppa_addr ppa) |
3eaa11e2 JG |
1995 | { |
1996 | struct nvm_tgt_dev *dev = pblk->dev; | |
1997 | struct nvm_geo *geo = &dev->geo; | |
1998 | struct pblk_lun *rlun; | |
43241cfe | 1999 | int pos = pblk_ppa_to_pos(geo, ppa); |
3eaa11e2 JG |
2000 | |
2001 | rlun = &pblk->luns[pos]; | |
2002 | up(&rlun->wr_sem); | |
2003 | } | |
2004 | ||
e99e802f | 2005 | void pblk_up_rq(struct pblk *pblk, unsigned long *lun_bitmap) |
a4bd217b JG |
2006 | { |
2007 | struct nvm_tgt_dev *dev = pblk->dev; | |
2008 | struct nvm_geo *geo = &dev->geo; | |
2009 | struct pblk_lun *rlun; | |
a40afad9 | 2010 | int num_lun = geo->all_luns; |
a4bd217b JG |
2011 | int bit = -1; |
2012 | ||
a40afad9 | 2013 | while ((bit = find_next_bit(lun_bitmap, num_lun, bit + 1)) < num_lun) { |
a4bd217b JG |
2014 | rlun = &pblk->luns[bit]; |
2015 | up(&rlun->wr_sem); | |
2016 | } | |
a4bd217b JG |
2017 | } |
2018 | ||
2019 | void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa) | |
2020 | { | |
9f6cb13b | 2021 | struct ppa_addr ppa_l2p; |
a4bd217b JG |
2022 | |
2023 | /* logic error: lba out-of-bounds. Ignore update */ | |
2024 | if (!(lba < pblk->rl.nr_secs)) { | |
2025 | WARN(1, "pblk: corrupted L2P map request\n"); | |
2026 | return; | |
2027 | } | |
2028 | ||
2029 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 2030 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
a4bd217b | 2031 | |
9f6cb13b JG |
2032 | if (!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p)) |
2033 | pblk_map_invalidate(pblk, ppa_l2p); | |
a4bd217b JG |
2034 | |
2035 | pblk_trans_map_set(pblk, lba, ppa); | |
2036 | spin_unlock(&pblk->trans_lock); | |
2037 | } | |
2038 | ||
2039 | void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa) | |
2040 | { | |
d340121e | 2041 | |
880eda54 | 2042 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
2043 | /* Callers must ensure that the ppa points to a cache address */ |
2044 | BUG_ON(!pblk_addr_in_cache(ppa)); | |
2045 | BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa))); | |
2046 | #endif | |
2047 | ||
2048 | pblk_update_map(pblk, lba, ppa); | |
2049 | } | |
2050 | ||
9f6cb13b | 2051 | int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa_new, |
d340121e | 2052 | struct pblk_line *gc_line, u64 paddr_gc) |
a4bd217b | 2053 | { |
d340121e | 2054 | struct ppa_addr ppa_l2p, ppa_gc; |
a4bd217b JG |
2055 | int ret = 1; |
2056 | ||
880eda54 | 2057 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b | 2058 | /* Callers must ensure that the ppa points to a cache address */ |
9f6cb13b JG |
2059 | BUG_ON(!pblk_addr_in_cache(ppa_new)); |
2060 | BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa_new))); | |
a4bd217b JG |
2061 | #endif |
2062 | ||
2063 | /* logic error: lba out-of-bounds. Ignore update */ | |
2064 | if (!(lba < pblk->rl.nr_secs)) { | |
2065 | WARN(1, "pblk: corrupted L2P map request\n"); | |
2066 | return 0; | |
2067 | } | |
2068 | ||
2069 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 2070 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
d340121e | 2071 | ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, gc_line->id); |
a4bd217b | 2072 | |
d340121e JG |
2073 | if (!pblk_ppa_comp(ppa_l2p, ppa_gc)) { |
2074 | spin_lock(&gc_line->lock); | |
2075 | WARN(!test_bit(paddr_gc, gc_line->invalid_bitmap), | |
2076 | "pblk: corrupted GC update"); | |
2077 | spin_unlock(&gc_line->lock); | |
9f6cb13b | 2078 | |
a4bd217b JG |
2079 | ret = 0; |
2080 | goto out; | |
2081 | } | |
2082 | ||
9f6cb13b | 2083 | pblk_trans_map_set(pblk, lba, ppa_new); |
a4bd217b JG |
2084 | out: |
2085 | spin_unlock(&pblk->trans_lock); | |
2086 | return ret; | |
2087 | } | |
2088 | ||
9f6cb13b JG |
2089 | void pblk_update_map_dev(struct pblk *pblk, sector_t lba, |
2090 | struct ppa_addr ppa_mapped, struct ppa_addr ppa_cache) | |
a4bd217b | 2091 | { |
9f6cb13b | 2092 | struct ppa_addr ppa_l2p; |
a4bd217b | 2093 | |
880eda54 | 2094 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b | 2095 | /* Callers must ensure that the ppa points to a device address */ |
9f6cb13b | 2096 | BUG_ON(pblk_addr_in_cache(ppa_mapped)); |
a4bd217b JG |
2097 | #endif |
2098 | /* Invalidate and discard padded entries */ | |
2099 | if (lba == ADDR_EMPTY) { | |
76758390 | 2100 | atomic64_inc(&pblk->pad_wa); |
880eda54 | 2101 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
2102 | atomic_long_inc(&pblk->padded_wb); |
2103 | #endif | |
9f6cb13b JG |
2104 | if (!pblk_ppa_empty(ppa_mapped)) |
2105 | pblk_map_invalidate(pblk, ppa_mapped); | |
a4bd217b JG |
2106 | return; |
2107 | } | |
2108 | ||
2109 | /* logic error: lba out-of-bounds. Ignore update */ | |
2110 | if (!(lba < pblk->rl.nr_secs)) { | |
2111 | WARN(1, "pblk: corrupted L2P map request\n"); | |
2112 | return; | |
2113 | } | |
2114 | ||
2115 | spin_lock(&pblk->trans_lock); | |
9f6cb13b | 2116 | ppa_l2p = pblk_trans_map_get(pblk, lba); |
a4bd217b JG |
2117 | |
2118 | /* Do not update L2P if the cacheline has been updated. In this case, | |
2119 | * the mapped ppa must be invalidated | |
2120 | */ | |
9f6cb13b JG |
2121 | if (!pblk_ppa_comp(ppa_l2p, ppa_cache)) { |
2122 | if (!pblk_ppa_empty(ppa_mapped)) | |
2123 | pblk_map_invalidate(pblk, ppa_mapped); | |
a4bd217b JG |
2124 | goto out; |
2125 | } | |
2126 | ||
880eda54 | 2127 | #ifdef CONFIG_NVM_PBLK_DEBUG |
9f6cb13b | 2128 | WARN_ON(!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p)); |
a4bd217b JG |
2129 | #endif |
2130 | ||
9f6cb13b | 2131 | pblk_trans_map_set(pblk, lba, ppa_mapped); |
a4bd217b JG |
2132 | out: |
2133 | spin_unlock(&pblk->trans_lock); | |
2134 | } | |
2135 | ||
2136 | void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas, | |
2137 | sector_t blba, int nr_secs) | |
2138 | { | |
2139 | int i; | |
2140 | ||
2141 | spin_lock(&pblk->trans_lock); | |
7bd4d370 JG |
2142 | for (i = 0; i < nr_secs; i++) { |
2143 | struct ppa_addr ppa; | |
2144 | ||
2145 | ppa = ppas[i] = pblk_trans_map_get(pblk, blba + i); | |
2146 | ||
2147 | /* If the L2P entry maps to a line, the reference is valid */ | |
2148 | if (!pblk_ppa_empty(ppa) && !pblk_addr_in_cache(ppa)) { | |
cb21665c | 2149 | struct pblk_line *line = pblk_ppa_to_line(pblk, ppa); |
7bd4d370 JG |
2150 | |
2151 | kref_get(&line->ref); | |
2152 | } | |
2153 | } | |
a4bd217b JG |
2154 | spin_unlock(&pblk->trans_lock); |
2155 | } | |
2156 | ||
2157 | void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas, | |
2158 | u64 *lba_list, int nr_secs) | |
2159 | { | |
d340121e | 2160 | u64 lba; |
a4bd217b JG |
2161 | int i; |
2162 | ||
2163 | spin_lock(&pblk->trans_lock); | |
2164 | for (i = 0; i < nr_secs; i++) { | |
2165 | lba = lba_list[i]; | |
d340121e | 2166 | if (lba != ADDR_EMPTY) { |
a4bd217b JG |
2167 | /* logic error: lba out-of-bounds. Ignore update */ |
2168 | if (!(lba < pblk->rl.nr_secs)) { | |
2169 | WARN(1, "pblk: corrupted L2P map request\n"); | |
2170 | continue; | |
2171 | } | |
2172 | ppas[i] = pblk_trans_map_get(pblk, lba); | |
2173 | } | |
2174 | } | |
2175 | spin_unlock(&pblk->trans_lock); | |
2176 | } | |
55d8ec35 IK |
2177 | |
2178 | void *pblk_get_meta_for_writes(struct pblk *pblk, struct nvm_rq *rqd) | |
2179 | { | |
2180 | void *buffer; | |
2181 | ||
2182 | if (pblk_is_oob_meta_supported(pblk)) { | |
2183 | /* Just use OOB metadata buffer as always */ | |
2184 | buffer = rqd->meta_list; | |
2185 | } else { | |
2186 | /* We need to reuse last page of request (packed metadata) | |
2187 | * in similar way as traditional oob metadata | |
2188 | */ | |
2189 | buffer = page_to_virt( | |
2190 | rqd->bio->bi_io_vec[rqd->bio->bi_vcnt - 1].bv_page); | |
2191 | } | |
2192 | ||
2193 | return buffer; | |
2194 | } | |
2195 | ||
2196 | void pblk_get_packed_meta(struct pblk *pblk, struct nvm_rq *rqd) | |
2197 | { | |
2198 | void *meta_list = rqd->meta_list; | |
2199 | void *page; | |
2200 | int i = 0; | |
2201 | ||
2202 | if (pblk_is_oob_meta_supported(pblk)) | |
2203 | return; | |
2204 | ||
2205 | page = page_to_virt(rqd->bio->bi_io_vec[rqd->bio->bi_vcnt - 1].bv_page); | |
2206 | /* We need to fill oob meta buffer with data from packed metadata */ | |
2207 | for (; i < rqd->nr_ppas; i++) | |
2208 | memcpy(pblk_get_meta(pblk, meta_list, i), | |
2209 | page + (i * sizeof(struct pblk_sec_meta)), | |
2210 | sizeof(struct pblk_sec_meta)); | |
2211 | } |