Commit | Line | Data |
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a4bd217b JG |
1 | /* |
2 | * Copyright (C) 2015 IT University of Copenhagen (rrpc.c) | |
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 | * Implementation of a physical block-device target for Open-channel SSDs. | |
17 | * | |
18 | * pblk-init.c - pblk's initialization. | |
19 | */ | |
20 | ||
21 | #include "pblk.h" | |
22 | ||
21ff1399 | 23 | static unsigned int write_buffer_size; |
4a828884 MD |
24 | |
25 | module_param(write_buffer_size, uint, 0644); | |
26 | MODULE_PARM_DESC(write_buffer_size, "number of entries in a write buffer"); | |
27 | ||
b84ae4a8 | 28 | static struct kmem_cache *pblk_ws_cache, *pblk_rec_cache, *pblk_g_rq_cache, |
e72ec1d3 | 29 | *pblk_w_rq_cache; |
a4bd217b | 30 | static DECLARE_RWSEM(pblk_lock); |
b906bbb6 | 31 | struct bio_set pblk_bio_set; |
a4bd217b JG |
32 | |
33 | static int pblk_rw_io(struct request_queue *q, struct pblk *pblk, | |
34 | struct bio *bio) | |
35 | { | |
36 | int ret; | |
37 | ||
38 | /* Read requests must be <= 256kb due to NVMe's 64 bit completion bitmap | |
39 | * constraint. Writes can be of arbitrary size. | |
40 | */ | |
41 | if (bio_data_dir(bio) == READ) { | |
af67c31f | 42 | blk_queue_split(q, &bio); |
a4bd217b JG |
43 | ret = pblk_submit_read(pblk, bio); |
44 | if (ret == NVM_IO_DONE && bio_flagged(bio, BIO_CLONED)) | |
45 | bio_put(bio); | |
46 | ||
47 | return ret; | |
48 | } | |
49 | ||
50 | /* Prevent deadlock in the case of a modest LUN configuration and large | |
51 | * user I/Os. Unless stalled, the rate limiter leaves at least 256KB | |
52 | * available for user I/O. | |
53 | */ | |
da67e68f | 54 | if (pblk_get_secs(bio) > pblk_rl_max_io(&pblk->rl)) |
af67c31f | 55 | blk_queue_split(q, &bio); |
a4bd217b JG |
56 | |
57 | return pblk_write_to_cache(pblk, bio, PBLK_IOTYPE_USER); | |
58 | } | |
59 | ||
60 | static blk_qc_t pblk_make_rq(struct request_queue *q, struct bio *bio) | |
61 | { | |
62 | struct pblk *pblk = q->queuedata; | |
63 | ||
64 | if (bio_op(bio) == REQ_OP_DISCARD) { | |
65 | pblk_discard(pblk, bio); | |
66 | if (!(bio->bi_opf & REQ_PREFLUSH)) { | |
67 | bio_endio(bio); | |
68 | return BLK_QC_T_NONE; | |
69 | } | |
70 | } | |
71 | ||
72 | switch (pblk_rw_io(q, pblk, bio)) { | |
73 | case NVM_IO_ERR: | |
74 | bio_io_error(bio); | |
75 | break; | |
76 | case NVM_IO_DONE: | |
77 | bio_endio(bio); | |
78 | break; | |
79 | } | |
80 | ||
81 | return BLK_QC_T_NONE; | |
82 | } | |
83 | ||
c5586192 HH |
84 | static size_t pblk_trans_map_size(struct pblk *pblk) |
85 | { | |
86 | int entry_size = 8; | |
87 | ||
bb845ae4 | 88 | if (pblk->addrf_len < 32) |
c5586192 HH |
89 | entry_size = 4; |
90 | ||
91 | return entry_size * pblk->rl.nr_secs; | |
92 | } | |
93 | ||
94 | #ifdef CONFIG_NVM_DEBUG | |
95 | static u32 pblk_l2p_crc(struct pblk *pblk) | |
96 | { | |
97 | size_t map_size; | |
98 | u32 crc = ~(u32)0; | |
99 | ||
100 | map_size = pblk_trans_map_size(pblk); | |
101 | crc = crc32_le(crc, pblk->trans_map, map_size); | |
102 | return crc; | |
103 | } | |
104 | #endif | |
105 | ||
a4bd217b JG |
106 | static void pblk_l2p_free(struct pblk *pblk) |
107 | { | |
108 | vfree(pblk->trans_map); | |
109 | } | |
110 | ||
43d47127 JG |
111 | static int pblk_l2p_recover(struct pblk *pblk, bool factory_init) |
112 | { | |
113 | struct pblk_line *line = NULL; | |
114 | ||
115 | if (factory_init) { | |
116 | pblk_setup_uuid(pblk); | |
117 | } else { | |
118 | line = pblk_recov_l2p(pblk); | |
119 | if (IS_ERR(line)) { | |
120 | pr_err("pblk: could not recover l2p table\n"); | |
121 | return -EFAULT; | |
122 | } | |
123 | } | |
124 | ||
125 | #ifdef CONFIG_NVM_DEBUG | |
126 | pr_info("pblk init: L2P CRC: %x\n", pblk_l2p_crc(pblk)); | |
127 | #endif | |
128 | ||
129 | /* Free full lines directly as GC has not been started yet */ | |
130 | pblk_gc_free_full_lines(pblk); | |
131 | ||
132 | if (!line) { | |
133 | /* Configure next line for user data */ | |
134 | line = pblk_line_get_first_data(pblk); | |
1d8b33e0 | 135 | if (!line) |
43d47127 | 136 | return -EFAULT; |
43d47127 JG |
137 | } |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int pblk_l2p_init(struct pblk *pblk, bool factory_init) | |
a4bd217b JG |
143 | { |
144 | sector_t i; | |
145 | struct ppa_addr ppa; | |
c5586192 | 146 | size_t map_size; |
1d8b33e0 | 147 | int ret = 0; |
a4bd217b | 148 | |
c5586192 HH |
149 | map_size = pblk_trans_map_size(pblk); |
150 | pblk->trans_map = vmalloc(map_size); | |
a4bd217b JG |
151 | if (!pblk->trans_map) |
152 | return -ENOMEM; | |
153 | ||
154 | pblk_ppa_set_empty(&ppa); | |
155 | ||
156 | for (i = 0; i < pblk->rl.nr_secs; i++) | |
157 | pblk_trans_map_set(pblk, i, ppa); | |
158 | ||
1d8b33e0 JG |
159 | ret = pblk_l2p_recover(pblk, factory_init); |
160 | if (ret) | |
161 | vfree(pblk->trans_map); | |
162 | ||
163 | return ret; | |
a4bd217b JG |
164 | } |
165 | ||
166 | static void pblk_rwb_free(struct pblk *pblk) | |
167 | { | |
168 | if (pblk_rb_tear_down_check(&pblk->rwb)) | |
169 | pr_err("pblk: write buffer error on tear down\n"); | |
170 | ||
171 | pblk_rb_data_free(&pblk->rwb); | |
172 | vfree(pblk_rb_entries_ref(&pblk->rwb)); | |
173 | } | |
174 | ||
175 | static int pblk_rwb_init(struct pblk *pblk) | |
176 | { | |
177 | struct nvm_tgt_dev *dev = pblk->dev; | |
178 | struct nvm_geo *geo = &dev->geo; | |
179 | struct pblk_rb_entry *entries; | |
4a828884 | 180 | unsigned long nr_entries, buffer_size; |
a4bd217b JG |
181 | unsigned int power_size, power_seg_sz; |
182 | ||
4a828884 MD |
183 | if (write_buffer_size && (write_buffer_size > pblk->pgs_in_buffer)) |
184 | buffer_size = write_buffer_size; | |
185 | else | |
186 | buffer_size = pblk->pgs_in_buffer; | |
187 | ||
188 | nr_entries = pblk_rb_calculate_size(buffer_size); | |
a4bd217b | 189 | |
fad953ce | 190 | entries = vzalloc(array_size(nr_entries, sizeof(struct pblk_rb_entry))); |
a4bd217b JG |
191 | if (!entries) |
192 | return -ENOMEM; | |
193 | ||
194 | power_size = get_count_order(nr_entries); | |
e46f4e48 | 195 | power_seg_sz = get_count_order(geo->csecs); |
a4bd217b JG |
196 | |
197 | return pblk_rb_init(&pblk->rwb, entries, power_size, power_seg_sz); | |
198 | } | |
199 | ||
200 | /* Minimum pages needed within a lun */ | |
a4bd217b JG |
201 | #define ADDR_POOL_SIZE 64 |
202 | ||
e46f4e48 | 203 | static int pblk_set_addrf_12(struct nvm_geo *geo, struct nvm_addrf_12 *dst) |
a4bd217b | 204 | { |
e46f4e48 JG |
205 | struct nvm_addrf_12 *src = (struct nvm_addrf_12 *)&geo->addrf; |
206 | int power_len; | |
a4bd217b JG |
207 | |
208 | /* Re-calculate channel and lun format to adapt to configuration */ | |
a40afad9 JG |
209 | power_len = get_count_order(geo->num_ch); |
210 | if (1 << power_len != geo->num_ch) { | |
a4bd217b JG |
211 | pr_err("pblk: supports only power-of-two channel config.\n"); |
212 | return -EINVAL; | |
213 | } | |
e46f4e48 | 214 | dst->ch_len = power_len; |
a4bd217b | 215 | |
a40afad9 JG |
216 | power_len = get_count_order(geo->num_lun); |
217 | if (1 << power_len != geo->num_lun) { | |
a4bd217b JG |
218 | pr_err("pblk: supports only power-of-two LUN config.\n"); |
219 | return -EINVAL; | |
220 | } | |
e46f4e48 JG |
221 | dst->lun_len = power_len; |
222 | ||
223 | dst->blk_len = src->blk_len; | |
224 | dst->pg_len = src->pg_len; | |
225 | dst->pln_len = src->pln_len; | |
a40afad9 | 226 | dst->sec_len = src->sec_len; |
e46f4e48 | 227 | |
a40afad9 JG |
228 | dst->sec_offset = 0; |
229 | dst->pln_offset = dst->sec_len; | |
e46f4e48 JG |
230 | dst->ch_offset = dst->pln_offset + dst->pln_len; |
231 | dst->lun_offset = dst->ch_offset + dst->ch_len; | |
232 | dst->pg_offset = dst->lun_offset + dst->lun_len; | |
233 | dst->blk_offset = dst->pg_offset + dst->pg_len; | |
234 | ||
a40afad9 | 235 | dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset; |
e46f4e48 JG |
236 | dst->pln_mask = ((1ULL << dst->pln_len) - 1) << dst->pln_offset; |
237 | dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset; | |
238 | dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset; | |
239 | dst->pg_mask = ((1ULL << dst->pg_len) - 1) << dst->pg_offset; | |
240 | dst->blk_mask = ((1ULL << dst->blk_len) - 1) << dst->blk_offset; | |
241 | ||
242 | return dst->blk_offset + src->blk_len; | |
243 | } | |
244 | ||
3b2a3ad1 JG |
245 | static int pblk_set_addrf_20(struct nvm_geo *geo, struct nvm_addrf *adst, |
246 | struct pblk_addrf *udst) | |
247 | { | |
248 | struct nvm_addrf *src = &geo->addrf; | |
249 | ||
250 | adst->ch_len = get_count_order(geo->num_ch); | |
251 | adst->lun_len = get_count_order(geo->num_lun); | |
252 | adst->chk_len = src->chk_len; | |
253 | adst->sec_len = src->sec_len; | |
254 | ||
255 | adst->sec_offset = 0; | |
256 | adst->ch_offset = adst->sec_len; | |
257 | adst->lun_offset = adst->ch_offset + adst->ch_len; | |
258 | adst->chk_offset = adst->lun_offset + adst->lun_len; | |
259 | ||
260 | adst->sec_mask = ((1ULL << adst->sec_len) - 1) << adst->sec_offset; | |
261 | adst->chk_mask = ((1ULL << adst->chk_len) - 1) << adst->chk_offset; | |
262 | adst->lun_mask = ((1ULL << adst->lun_len) - 1) << adst->lun_offset; | |
263 | adst->ch_mask = ((1ULL << adst->ch_len) - 1) << adst->ch_offset; | |
264 | ||
265 | udst->sec_stripe = geo->ws_opt; | |
266 | udst->ch_stripe = geo->num_ch; | |
267 | udst->lun_stripe = geo->num_lun; | |
268 | ||
269 | udst->sec_lun_stripe = udst->sec_stripe * udst->ch_stripe; | |
270 | udst->sec_ws_stripe = udst->sec_lun_stripe * udst->lun_stripe; | |
271 | ||
272 | return adst->chk_offset + adst->chk_len; | |
273 | } | |
274 | ||
bb845ae4 | 275 | static int pblk_set_addrf(struct pblk *pblk) |
e46f4e48 JG |
276 | { |
277 | struct nvm_tgt_dev *dev = pblk->dev; | |
278 | struct nvm_geo *geo = &dev->geo; | |
279 | int mod; | |
280 | ||
3b2a3ad1 JG |
281 | switch (geo->version) { |
282 | case NVM_OCSSD_SPEC_12: | |
283 | div_u64_rem(geo->clba, pblk->min_write_pgs, &mod); | |
284 | if (mod) { | |
285 | pr_err("pblk: bad configuration of sectors/pages\n"); | |
286 | return -EINVAL; | |
287 | } | |
288 | ||
289 | pblk->addrf_len = pblk_set_addrf_12(geo, (void *)&pblk->addrf); | |
290 | break; | |
291 | case NVM_OCSSD_SPEC_20: | |
292 | pblk->addrf_len = pblk_set_addrf_20(geo, (void *)&pblk->addrf, | |
293 | &pblk->uaddrf); | |
294 | break; | |
295 | default: | |
296 | pr_err("pblk: OCSSD revision not supported (%d)\n", | |
297 | geo->version); | |
e46f4e48 JG |
298 | return -EINVAL; |
299 | } | |
300 | ||
a4bd217b JG |
301 | return 0; |
302 | } | |
303 | ||
304 | static int pblk_init_global_caches(struct pblk *pblk) | |
305 | { | |
a4bd217b | 306 | down_write(&pblk_lock); |
b84ae4a8 | 307 | pblk_ws_cache = kmem_cache_create("pblk_blk_ws", |
a4bd217b | 308 | sizeof(struct pblk_line_ws), 0, 0, NULL); |
b84ae4a8 | 309 | if (!pblk_ws_cache) { |
a4bd217b JG |
310 | up_write(&pblk_lock); |
311 | return -ENOMEM; | |
312 | } | |
313 | ||
314 | pblk_rec_cache = kmem_cache_create("pblk_rec", | |
315 | sizeof(struct pblk_rec_ctx), 0, 0, NULL); | |
316 | if (!pblk_rec_cache) { | |
b84ae4a8 | 317 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
318 | up_write(&pblk_lock); |
319 | return -ENOMEM; | |
320 | } | |
321 | ||
084ec9ba | 322 | pblk_g_rq_cache = kmem_cache_create("pblk_g_rq", pblk_g_rq_size, |
a4bd217b | 323 | 0, 0, NULL); |
084ec9ba | 324 | if (!pblk_g_rq_cache) { |
b84ae4a8 | 325 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
326 | kmem_cache_destroy(pblk_rec_cache); |
327 | up_write(&pblk_lock); | |
328 | return -ENOMEM; | |
329 | } | |
330 | ||
331 | pblk_w_rq_cache = kmem_cache_create("pblk_w_rq", pblk_w_rq_size, | |
332 | 0, 0, NULL); | |
333 | if (!pblk_w_rq_cache) { | |
b84ae4a8 | 334 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b | 335 | kmem_cache_destroy(pblk_rec_cache); |
084ec9ba | 336 | kmem_cache_destroy(pblk_g_rq_cache); |
a4bd217b JG |
337 | up_write(&pblk_lock); |
338 | return -ENOMEM; | |
339 | } | |
a4bd217b JG |
340 | up_write(&pblk_lock); |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
22a4e061 RP |
345 | static void pblk_free_global_caches(struct pblk *pblk) |
346 | { | |
347 | kmem_cache_destroy(pblk_ws_cache); | |
348 | kmem_cache_destroy(pblk_rec_cache); | |
349 | kmem_cache_destroy(pblk_g_rq_cache); | |
350 | kmem_cache_destroy(pblk_w_rq_cache); | |
351 | } | |
352 | ||
a4bd217b JG |
353 | static int pblk_core_init(struct pblk *pblk) |
354 | { | |
355 | struct nvm_tgt_dev *dev = pblk->dev; | |
356 | struct nvm_geo *geo = &dev->geo; | |
b906bbb6 | 357 | int ret, max_write_ppas; |
43d47127 JG |
358 | |
359 | atomic64_set(&pblk->user_wa, 0); | |
360 | atomic64_set(&pblk->pad_wa, 0); | |
361 | atomic64_set(&pblk->gc_wa, 0); | |
362 | pblk->user_rst_wa = 0; | |
363 | pblk->pad_rst_wa = 0; | |
364 | pblk->gc_rst_wa = 0; | |
365 | ||
366 | atomic64_set(&pblk->nr_flush, 0); | |
367 | pblk->nr_flush_rst = 0; | |
a4bd217b | 368 | |
e46f4e48 | 369 | pblk->pgs_in_buffer = geo->mw_cunits * geo->all_luns; |
a4bd217b | 370 | |
e46f4e48 | 371 | pblk->min_write_pgs = geo->ws_opt * (geo->csecs / PAGE_SIZE); |
43d47127 JG |
372 | max_write_ppas = pblk->min_write_pgs * geo->all_luns; |
373 | pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA); | |
374 | pblk_set_sec_per_write(pblk, pblk->min_write_pgs); | |
375 | ||
376 | if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) { | |
377 | pr_err("pblk: vector list too big(%u > %u)\n", | |
378 | pblk->max_write_pgs, PBLK_MAX_REQ_ADDRS); | |
379 | return -EINVAL; | |
380 | } | |
381 | ||
6396bb22 | 382 | pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1, sizeof(atomic64_t), |
43d47127 JG |
383 | GFP_KERNEL); |
384 | if (!pblk->pad_dist) | |
a4bd217b JG |
385 | return -ENOMEM; |
386 | ||
43d47127 JG |
387 | if (pblk_init_global_caches(pblk)) |
388 | goto fail_free_pad_dist; | |
389 | ||
b84ae4a8 | 390 | /* Internal bios can be at most the sectors signaled by the device. */ |
b906bbb6 KO |
391 | ret = mempool_init_page_pool(&pblk->page_bio_pool, NVM_MAX_VLBA, 0); |
392 | if (ret) | |
22a4e061 | 393 | goto free_global_caches; |
a4bd217b | 394 | |
b906bbb6 KO |
395 | ret = mempool_init_slab_pool(&pblk->gen_ws_pool, PBLK_GEN_WS_POOL_SIZE, |
396 | pblk_ws_cache); | |
397 | if (ret) | |
bd432417 | 398 | goto free_page_bio_pool; |
a4bd217b | 399 | |
b906bbb6 KO |
400 | ret = mempool_init_slab_pool(&pblk->rec_pool, geo->all_luns, |
401 | pblk_rec_cache); | |
402 | if (ret) | |
b84ae4a8 | 403 | goto free_gen_ws_pool; |
a4bd217b | 404 | |
b906bbb6 KO |
405 | ret = mempool_init_slab_pool(&pblk->r_rq_pool, geo->all_luns, |
406 | pblk_g_rq_cache); | |
407 | if (ret) | |
a4bd217b JG |
408 | goto free_rec_pool; |
409 | ||
b906bbb6 KO |
410 | ret = mempool_init_slab_pool(&pblk->e_rq_pool, geo->all_luns, |
411 | pblk_g_rq_cache); | |
412 | if (ret) | |
0d880398 JG |
413 | goto free_r_rq_pool; |
414 | ||
b906bbb6 KO |
415 | ret = mempool_init_slab_pool(&pblk->w_rq_pool, geo->all_luns, |
416 | pblk_w_rq_cache); | |
417 | if (ret) | |
0d880398 | 418 | goto free_e_rq_pool; |
a4bd217b | 419 | |
ef576494 JG |
420 | pblk->close_wq = alloc_workqueue("pblk-close-wq", |
421 | WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_NR_CLOSE_JOBS); | |
422 | if (!pblk->close_wq) | |
e72ec1d3 | 423 | goto free_w_rq_pool; |
a4bd217b | 424 | |
ef576494 JG |
425 | pblk->bb_wq = alloc_workqueue("pblk-bb-wq", |
426 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
427 | if (!pblk->bb_wq) | |
428 | goto free_close_wq; | |
429 | ||
7bd4d370 JG |
430 | pblk->r_end_wq = alloc_workqueue("pblk-read-end-wq", |
431 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
432 | if (!pblk->r_end_wq) | |
ef576494 | 433 | goto free_bb_wq; |
a4bd217b | 434 | |
bb845ae4 | 435 | if (pblk_set_addrf(pblk)) |
7bd4d370 JG |
436 | goto free_r_end_wq; |
437 | ||
a4bd217b | 438 | INIT_LIST_HEAD(&pblk->compl_list); |
6a3abf5b | 439 | INIT_LIST_HEAD(&pblk->resubmit_list); |
43d47127 | 440 | |
a4bd217b JG |
441 | return 0; |
442 | ||
7bd4d370 JG |
443 | free_r_end_wq: |
444 | destroy_workqueue(pblk->r_end_wq); | |
ef576494 JG |
445 | free_bb_wq: |
446 | destroy_workqueue(pblk->bb_wq); | |
447 | free_close_wq: | |
448 | destroy_workqueue(pblk->close_wq); | |
a4bd217b | 449 | free_w_rq_pool: |
b906bbb6 | 450 | mempool_exit(&pblk->w_rq_pool); |
0d880398 | 451 | free_e_rq_pool: |
b906bbb6 | 452 | mempool_exit(&pblk->e_rq_pool); |
0d880398 | 453 | free_r_rq_pool: |
b906bbb6 | 454 | mempool_exit(&pblk->r_rq_pool); |
a4bd217b | 455 | free_rec_pool: |
b906bbb6 | 456 | mempool_exit(&pblk->rec_pool); |
b84ae4a8 | 457 | free_gen_ws_pool: |
b906bbb6 | 458 | mempool_exit(&pblk->gen_ws_pool); |
bd432417 | 459 | free_page_bio_pool: |
b906bbb6 | 460 | mempool_exit(&pblk->page_bio_pool); |
22a4e061 RP |
461 | free_global_caches: |
462 | pblk_free_global_caches(pblk); | |
43d47127 JG |
463 | fail_free_pad_dist: |
464 | kfree(pblk->pad_dist); | |
a4bd217b JG |
465 | return -ENOMEM; |
466 | } | |
467 | ||
468 | static void pblk_core_free(struct pblk *pblk) | |
469 | { | |
ef576494 JG |
470 | if (pblk->close_wq) |
471 | destroy_workqueue(pblk->close_wq); | |
472 | ||
7bd4d370 JG |
473 | if (pblk->r_end_wq) |
474 | destroy_workqueue(pblk->r_end_wq); | |
475 | ||
ef576494 JG |
476 | if (pblk->bb_wq) |
477 | destroy_workqueue(pblk->bb_wq); | |
a4bd217b | 478 | |
b906bbb6 KO |
479 | mempool_exit(&pblk->page_bio_pool); |
480 | mempool_exit(&pblk->gen_ws_pool); | |
481 | mempool_exit(&pblk->rec_pool); | |
482 | mempool_exit(&pblk->r_rq_pool); | |
483 | mempool_exit(&pblk->e_rq_pool); | |
484 | mempool_exit(&pblk->w_rq_pool); | |
a4bd217b | 485 | |
22a4e061 | 486 | pblk_free_global_caches(pblk); |
43d47127 | 487 | kfree(pblk->pad_dist); |
a4bd217b JG |
488 | } |
489 | ||
e411b331 JG |
490 | static void pblk_line_mg_free(struct pblk *pblk) |
491 | { | |
492 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
493 | int i; | |
494 | ||
495 | kfree(l_mg->bb_template); | |
496 | kfree(l_mg->bb_aux); | |
497 | kfree(l_mg->vsc_list); | |
498 | ||
499 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
500 | kfree(l_mg->sline_meta[i]); | |
501 | pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type); | |
502 | kfree(l_mg->eline_meta[i]); | |
503 | } | |
e411b331 JG |
504 | } |
505 | ||
48b8d208 HH |
506 | static void pblk_line_meta_free(struct pblk_line_mgmt *l_mg, |
507 | struct pblk_line *line) | |
dffdd960 | 508 | { |
48b8d208 HH |
509 | struct pblk_w_err_gc *w_err_gc = line->w_err_gc; |
510 | ||
dffdd960 JG |
511 | kfree(line->blk_bitmap); |
512 | kfree(line->erase_bitmap); | |
32ef9412 | 513 | kfree(line->chks); |
48b8d208 HH |
514 | |
515 | pblk_mfree(w_err_gc->lba_list, l_mg->emeta_alloc_type); | |
516 | kfree(w_err_gc); | |
dffdd960 JG |
517 | } |
518 | ||
a4bd217b JG |
519 | static void pblk_lines_free(struct pblk *pblk) |
520 | { | |
521 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
522 | struct pblk_line *line; | |
523 | int i; | |
524 | ||
525 | spin_lock(&l_mg->free_lock); | |
526 | for (i = 0; i < l_mg->nr_lines; i++) { | |
527 | line = &pblk->lines[i]; | |
528 | ||
8e55c07b | 529 | pblk_line_free(line); |
48b8d208 | 530 | pblk_line_meta_free(l_mg, line); |
a4bd217b JG |
531 | } |
532 | spin_unlock(&l_mg->free_lock); | |
43d47127 JG |
533 | |
534 | pblk_line_mg_free(pblk); | |
535 | ||
536 | kfree(pblk->luns); | |
537 | kfree(pblk->lines); | |
a4bd217b JG |
538 | } |
539 | ||
e411b331 JG |
540 | static int pblk_bb_get_tbl(struct nvm_tgt_dev *dev, struct pblk_lun *rlun, |
541 | u8 *blks, int nr_blks) | |
a4bd217b | 542 | { |
a4bd217b | 543 | struct ppa_addr ppa; |
e411b331 | 544 | int ret; |
a4bd217b JG |
545 | |
546 | ppa.ppa = 0; | |
547 | ppa.g.ch = rlun->bppa.g.ch; | |
548 | ppa.g.lun = rlun->bppa.g.lun; | |
549 | ||
550 | ret = nvm_get_tgt_bb_tbl(dev, ppa, blks); | |
551 | if (ret) | |
e411b331 | 552 | return ret; |
a4bd217b JG |
553 | |
554 | nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks); | |
e411b331 JG |
555 | if (nr_blks < 0) |
556 | return -EIO; | |
a4bd217b | 557 | |
5136a4fd | 558 | return 0; |
a4bd217b JG |
559 | } |
560 | ||
32ef9412 | 561 | static void *pblk_bb_get_meta(struct pblk *pblk) |
a4bd217b | 562 | { |
dffdd960 JG |
563 | struct nvm_tgt_dev *dev = pblk->dev; |
564 | struct nvm_geo *geo = &dev->geo; | |
32ef9412 | 565 | u8 *meta; |
e411b331 JG |
566 | int i, nr_blks, blk_per_lun; |
567 | int ret; | |
a4bd217b | 568 | |
a40afad9 | 569 | blk_per_lun = geo->num_chk * geo->pln_mode; |
e411b331 | 570 | nr_blks = blk_per_lun * geo->all_luns; |
dffdd960 | 571 | |
32ef9412 JG |
572 | meta = kmalloc(nr_blks, GFP_KERNEL); |
573 | if (!meta) | |
e411b331 JG |
574 | return ERR_PTR(-ENOMEM); |
575 | ||
576 | for (i = 0; i < geo->all_luns; i++) { | |
577 | struct pblk_lun *rlun = &pblk->luns[i]; | |
32ef9412 | 578 | u8 *meta_pos = meta + i * blk_per_lun; |
e411b331 | 579 | |
32ef9412 | 580 | ret = pblk_bb_get_tbl(dev, rlun, meta_pos, blk_per_lun); |
e411b331 | 581 | if (ret) { |
32ef9412 | 582 | kfree(meta); |
e411b331 JG |
583 | return ERR_PTR(-EIO); |
584 | } | |
dffdd960 JG |
585 | } |
586 | ||
32ef9412 | 587 | return meta; |
dffdd960 JG |
588 | } |
589 | ||
32ef9412 | 590 | static void *pblk_chunk_get_meta(struct pblk *pblk) |
dffdd960 | 591 | { |
e411b331 JG |
592 | struct nvm_tgt_dev *dev = pblk->dev; |
593 | struct nvm_geo *geo = &dev->geo; | |
dffdd960 | 594 | |
32ef9412 JG |
595 | if (geo->version == NVM_OCSSD_SPEC_12) |
596 | return pblk_bb_get_meta(pblk); | |
597 | else | |
598 | return pblk_chunk_get_info(pblk); | |
a4bd217b JG |
599 | } |
600 | ||
43d47127 | 601 | static int pblk_luns_init(struct pblk *pblk) |
a4bd217b JG |
602 | { |
603 | struct nvm_tgt_dev *dev = pblk->dev; | |
604 | struct nvm_geo *geo = &dev->geo; | |
605 | struct pblk_lun *rlun; | |
e411b331 | 606 | int i; |
a4bd217b JG |
607 | |
608 | /* TODO: Implement unbalanced LUN support */ | |
a40afad9 | 609 | if (geo->num_lun < 0) { |
a4bd217b JG |
610 | pr_err("pblk: unbalanced LUN config.\n"); |
611 | return -EINVAL; | |
612 | } | |
613 | ||
fae7fae4 MB |
614 | pblk->luns = kcalloc(geo->all_luns, sizeof(struct pblk_lun), |
615 | GFP_KERNEL); | |
a4bd217b JG |
616 | if (!pblk->luns) |
617 | return -ENOMEM; | |
618 | ||
fae7fae4 | 619 | for (i = 0; i < geo->all_luns; i++) { |
a4bd217b | 620 | /* Stripe across channels */ |
a40afad9 JG |
621 | int ch = i % geo->num_ch; |
622 | int lun_raw = i / geo->num_ch; | |
623 | int lunid = lun_raw + ch * geo->num_lun; | |
a4bd217b JG |
624 | |
625 | rlun = &pblk->luns[i]; | |
43d47127 | 626 | rlun->bppa = dev->luns[lunid]; |
a4bd217b JG |
627 | |
628 | sema_init(&rlun->wr_sem, 1); | |
a4bd217b JG |
629 | } |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
a4bd217b | 634 | /* See comment over struct line_emeta definition */ |
dd2a4343 | 635 | static unsigned int calc_emeta_len(struct pblk *pblk) |
a4bd217b | 636 | { |
dd2a4343 JG |
637 | struct pblk_line_meta *lm = &pblk->lm; |
638 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
639 | struct nvm_tgt_dev *dev = pblk->dev; | |
640 | struct nvm_geo *geo = &dev->geo; | |
641 | ||
642 | /* Round to sector size so that lba_list starts on its own sector */ | |
643 | lm->emeta_sec[1] = DIV_ROUND_UP( | |
76758390 | 644 | sizeof(struct line_emeta) + lm->blk_bitmap_len + |
e46f4e48 JG |
645 | sizeof(struct wa_counters), geo->csecs); |
646 | lm->emeta_len[1] = lm->emeta_sec[1] * geo->csecs; | |
dd2a4343 JG |
647 | |
648 | /* Round to sector size so that vsc_list starts on its own sector */ | |
649 | lm->dsec_per_line = lm->sec_per_line - lm->emeta_sec[0]; | |
650 | lm->emeta_sec[2] = DIV_ROUND_UP(lm->dsec_per_line * sizeof(u64), | |
e46f4e48 JG |
651 | geo->csecs); |
652 | lm->emeta_len[2] = lm->emeta_sec[2] * geo->csecs; | |
dd2a4343 JG |
653 | |
654 | lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32), | |
e46f4e48 JG |
655 | geo->csecs); |
656 | lm->emeta_len[3] = lm->emeta_sec[3] * geo->csecs; | |
dd2a4343 JG |
657 | |
658 | lm->vsc_list_len = l_mg->nr_lines * sizeof(u32); | |
659 | ||
660 | return (lm->emeta_len[1] + lm->emeta_len[2] + lm->emeta_len[3]); | |
a4bd217b JG |
661 | } |
662 | ||
663 | static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) | |
664 | { | |
665 | struct nvm_tgt_dev *dev = pblk->dev; | |
a7689938 JG |
666 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
667 | struct pblk_line_meta *lm = &pblk->lm; | |
a4bd217b JG |
668 | struct nvm_geo *geo = &dev->geo; |
669 | sector_t provisioned; | |
a7689938 | 670 | int sec_meta, blk_meta; |
a4bd217b | 671 | |
e5392739 JG |
672 | if (geo->op == NVM_TARGET_DEFAULT_OP) |
673 | pblk->op = PBLK_DEFAULT_OP; | |
674 | else | |
675 | pblk->op = geo->op; | |
a4bd217b JG |
676 | |
677 | provisioned = nr_free_blks; | |
a7689938 | 678 | provisioned *= (100 - pblk->op); |
a4bd217b JG |
679 | sector_div(provisioned, 100); |
680 | ||
a7689938 JG |
681 | pblk->op_blks = nr_free_blks - provisioned; |
682 | ||
a4bd217b JG |
683 | /* Internally pblk manages all free blocks, but all calculations based |
684 | * on user capacity consider only provisioned blocks | |
685 | */ | |
686 | pblk->rl.total_blocks = nr_free_blks; | |
e46f4e48 | 687 | pblk->rl.nr_secs = nr_free_blks * geo->clba; |
a7689938 JG |
688 | |
689 | /* Consider sectors used for metadata */ | |
690 | sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines; | |
e46f4e48 | 691 | blk_meta = DIV_ROUND_UP(sec_meta, geo->clba); |
a7689938 | 692 | |
e46f4e48 | 693 | pblk->capacity = (provisioned - blk_meta) * geo->clba; |
a7689938 | 694 | |
a4bd217b | 695 | atomic_set(&pblk->rl.free_blocks, nr_free_blks); |
a7689938 | 696 | atomic_set(&pblk->rl.free_user_blocks, nr_free_blks); |
a4bd217b JG |
697 | } |
698 | ||
32ef9412 JG |
699 | static int pblk_setup_line_meta_12(struct pblk *pblk, struct pblk_line *line, |
700 | void *chunk_meta) | |
701 | { | |
702 | struct nvm_tgt_dev *dev = pblk->dev; | |
703 | struct nvm_geo *geo = &dev->geo; | |
704 | struct pblk_line_meta *lm = &pblk->lm; | |
705 | int i, chk_per_lun, nr_bad_chks = 0; | |
706 | ||
707 | chk_per_lun = geo->num_chk * geo->pln_mode; | |
708 | ||
709 | for (i = 0; i < lm->blk_per_line; i++) { | |
710 | struct pblk_lun *rlun = &pblk->luns[i]; | |
711 | struct nvm_chk_meta *chunk; | |
712 | int pos = pblk_ppa_to_pos(geo, rlun->bppa); | |
713 | u8 *lun_bb_meta = chunk_meta + pos * chk_per_lun; | |
714 | ||
715 | chunk = &line->chks[pos]; | |
716 | ||
717 | /* | |
718 | * In 1.2 spec. chunk state is not persisted by the device. Thus | |
719 | * some of the values are reset each time pblk is instantiated. | |
720 | */ | |
721 | if (lun_bb_meta[line->id] == NVM_BLK_T_FREE) | |
722 | chunk->state = NVM_CHK_ST_FREE; | |
723 | else | |
724 | chunk->state = NVM_CHK_ST_OFFLINE; | |
725 | ||
726 | chunk->type = NVM_CHK_TP_W_SEQ; | |
727 | chunk->wi = 0; | |
728 | chunk->slba = -1; | |
729 | chunk->cnlb = geo->clba; | |
730 | chunk->wp = 0; | |
731 | ||
732 | if (!(chunk->state & NVM_CHK_ST_OFFLINE)) | |
733 | continue; | |
734 | ||
735 | set_bit(pos, line->blk_bitmap); | |
736 | nr_bad_chks++; | |
737 | } | |
738 | ||
739 | return nr_bad_chks; | |
740 | } | |
741 | ||
742 | static int pblk_setup_line_meta_20(struct pblk *pblk, struct pblk_line *line, | |
743 | struct nvm_chk_meta *meta) | |
744 | { | |
745 | struct nvm_tgt_dev *dev = pblk->dev; | |
746 | struct nvm_geo *geo = &dev->geo; | |
747 | struct pblk_line_meta *lm = &pblk->lm; | |
748 | int i, nr_bad_chks = 0; | |
749 | ||
750 | for (i = 0; i < lm->blk_per_line; i++) { | |
751 | struct pblk_lun *rlun = &pblk->luns[i]; | |
752 | struct nvm_chk_meta *chunk; | |
753 | struct nvm_chk_meta *chunk_meta; | |
754 | struct ppa_addr ppa; | |
755 | int pos; | |
756 | ||
757 | ppa = rlun->bppa; | |
758 | pos = pblk_ppa_to_pos(geo, ppa); | |
759 | chunk = &line->chks[pos]; | |
760 | ||
761 | ppa.m.chk = line->id; | |
762 | chunk_meta = pblk_chunk_get_off(pblk, meta, ppa); | |
763 | ||
764 | chunk->state = chunk_meta->state; | |
765 | chunk->type = chunk_meta->type; | |
766 | chunk->wi = chunk_meta->wi; | |
767 | chunk->slba = chunk_meta->slba; | |
768 | chunk->cnlb = chunk_meta->cnlb; | |
769 | chunk->wp = chunk_meta->wp; | |
770 | ||
32ef9412 JG |
771 | if (chunk->type & NVM_CHK_TP_SZ_SPEC) { |
772 | WARN_ONCE(1, "pblk: custom-sized chunks unsupported\n"); | |
773 | continue; | |
774 | } | |
775 | ||
6f9c9607 JG |
776 | if (!(chunk->state & NVM_CHK_ST_OFFLINE)) |
777 | continue; | |
778 | ||
32ef9412 JG |
779 | set_bit(pos, line->blk_bitmap); |
780 | nr_bad_chks++; | |
781 | } | |
782 | ||
783 | return nr_bad_chks; | |
784 | } | |
785 | ||
786 | static long pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line, | |
787 | void *chunk_meta, int line_id) | |
788 | { | |
789 | struct nvm_tgt_dev *dev = pblk->dev; | |
790 | struct nvm_geo *geo = &dev->geo; | |
791 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
792 | struct pblk_line_meta *lm = &pblk->lm; | |
793 | long nr_bad_chks, chk_in_line; | |
794 | ||
795 | line->pblk = pblk; | |
796 | line->id = line_id; | |
797 | line->type = PBLK_LINETYPE_FREE; | |
798 | line->state = PBLK_LINESTATE_NEW; | |
799 | line->gc_group = PBLK_LINEGC_NONE; | |
800 | line->vsc = &l_mg->vsc_list[line_id]; | |
801 | spin_lock_init(&line->lock); | |
802 | ||
803 | if (geo->version == NVM_OCSSD_SPEC_12) | |
804 | nr_bad_chks = pblk_setup_line_meta_12(pblk, line, chunk_meta); | |
805 | else | |
806 | nr_bad_chks = pblk_setup_line_meta_20(pblk, line, chunk_meta); | |
807 | ||
808 | chk_in_line = lm->blk_per_line - nr_bad_chks; | |
809 | if (nr_bad_chks < 0 || nr_bad_chks > lm->blk_per_line || | |
810 | chk_in_line < lm->min_blk_line) { | |
811 | line->state = PBLK_LINESTATE_BAD; | |
812 | list_add_tail(&line->list, &l_mg->bad_list); | |
813 | return 0; | |
814 | } | |
815 | ||
816 | atomic_set(&line->blk_in_line, chk_in_line); | |
817 | list_add_tail(&line->list, &l_mg->free_list); | |
818 | l_mg->nr_free_lines++; | |
819 | ||
820 | return chk_in_line; | |
821 | } | |
822 | ||
823 | static int pblk_alloc_line_meta(struct pblk *pblk, struct pblk_line *line) | |
43d47127 JG |
824 | { |
825 | struct pblk_line_meta *lm = &pblk->lm; | |
826 | ||
827 | line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); | |
828 | if (!line->blk_bitmap) | |
829 | return -ENOMEM; | |
830 | ||
831 | line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); | |
48b8d208 HH |
832 | if (!line->erase_bitmap) |
833 | goto free_blk_bitmap; | |
834 | ||
43d47127 | 835 | |
6da2ec56 KC |
836 | line->chks = kmalloc_array(lm->blk_per_line, |
837 | sizeof(struct nvm_chk_meta), GFP_KERNEL); | |
48b8d208 HH |
838 | if (!line->chks) |
839 | goto free_erase_bitmap; | |
840 | ||
841 | line->w_err_gc = kzalloc(sizeof(struct pblk_w_err_gc), GFP_KERNEL); | |
842 | if (!line->w_err_gc) | |
843 | goto free_chks; | |
43d47127 JG |
844 | |
845 | return 0; | |
48b8d208 HH |
846 | |
847 | free_chks: | |
848 | kfree(line->chks); | |
849 | free_erase_bitmap: | |
850 | kfree(line->erase_bitmap); | |
851 | free_blk_bitmap: | |
852 | kfree(line->blk_bitmap); | |
853 | return -ENOMEM; | |
43d47127 JG |
854 | } |
855 | ||
856 | static int pblk_line_mg_init(struct pblk *pblk) | |
dd2a4343 | 857 | { |
43d47127 JG |
858 | struct nvm_tgt_dev *dev = pblk->dev; |
859 | struct nvm_geo *geo = &dev->geo; | |
dd2a4343 JG |
860 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
861 | struct pblk_line_meta *lm = &pblk->lm; | |
43d47127 JG |
862 | int i, bb_distance; |
863 | ||
a40afad9 | 864 | l_mg->nr_lines = geo->num_chk; |
43d47127 JG |
865 | l_mg->log_line = l_mg->data_line = NULL; |
866 | l_mg->l_seq_nr = l_mg->d_seq_nr = 0; | |
867 | l_mg->nr_free_lines = 0; | |
868 | bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
869 | ||
870 | INIT_LIST_HEAD(&l_mg->free_list); | |
871 | INIT_LIST_HEAD(&l_mg->corrupt_list); | |
872 | INIT_LIST_HEAD(&l_mg->bad_list); | |
873 | INIT_LIST_HEAD(&l_mg->gc_full_list); | |
874 | INIT_LIST_HEAD(&l_mg->gc_high_list); | |
875 | INIT_LIST_HEAD(&l_mg->gc_mid_list); | |
876 | INIT_LIST_HEAD(&l_mg->gc_low_list); | |
877 | INIT_LIST_HEAD(&l_mg->gc_empty_list); | |
48b8d208 | 878 | INIT_LIST_HEAD(&l_mg->gc_werr_list); |
43d47127 JG |
879 | |
880 | INIT_LIST_HEAD(&l_mg->emeta_list); | |
881 | ||
48b8d208 HH |
882 | l_mg->gc_lists[0] = &l_mg->gc_werr_list; |
883 | l_mg->gc_lists[1] = &l_mg->gc_high_list; | |
884 | l_mg->gc_lists[2] = &l_mg->gc_mid_list; | |
885 | l_mg->gc_lists[3] = &l_mg->gc_low_list; | |
43d47127 JG |
886 | |
887 | spin_lock_init(&l_mg->free_lock); | |
888 | spin_lock_init(&l_mg->close_lock); | |
889 | spin_lock_init(&l_mg->gc_lock); | |
890 | ||
891 | l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL); | |
892 | if (!l_mg->vsc_list) | |
893 | goto fail; | |
894 | ||
895 | l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
896 | if (!l_mg->bb_template) | |
897 | goto fail_free_vsc_list; | |
898 | ||
899 | l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
900 | if (!l_mg->bb_aux) | |
901 | goto fail_free_bb_template; | |
dd2a4343 JG |
902 | |
903 | /* smeta is always small enough to fit on a kmalloc memory allocation, | |
904 | * emeta depends on the number of LUNs allocated to the pblk instance | |
905 | */ | |
dd2a4343 JG |
906 | for (i = 0; i < PBLK_DATA_LINES; i++) { |
907 | l_mg->sline_meta[i] = kmalloc(lm->smeta_len, GFP_KERNEL); | |
908 | if (!l_mg->sline_meta[i]) | |
909 | goto fail_free_smeta; | |
910 | } | |
911 | ||
912 | /* emeta allocates three different buffers for managing metadata with | |
913 | * in-memory and in-media layouts | |
914 | */ | |
915 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
916 | struct pblk_emeta *emeta; | |
917 | ||
918 | emeta = kmalloc(sizeof(struct pblk_emeta), GFP_KERNEL); | |
919 | if (!emeta) | |
920 | goto fail_free_emeta; | |
921 | ||
922 | if (lm->emeta_len[0] > KMALLOC_MAX_CACHE_SIZE) { | |
923 | l_mg->emeta_alloc_type = PBLK_VMALLOC_META; | |
924 | ||
925 | emeta->buf = vmalloc(lm->emeta_len[0]); | |
926 | if (!emeta->buf) { | |
927 | kfree(emeta); | |
928 | goto fail_free_emeta; | |
929 | } | |
930 | ||
931 | emeta->nr_entries = lm->emeta_sec[0]; | |
932 | l_mg->eline_meta[i] = emeta; | |
933 | } else { | |
934 | l_mg->emeta_alloc_type = PBLK_KMALLOC_META; | |
935 | ||
936 | emeta->buf = kmalloc(lm->emeta_len[0], GFP_KERNEL); | |
937 | if (!emeta->buf) { | |
938 | kfree(emeta); | |
939 | goto fail_free_emeta; | |
940 | } | |
941 | ||
942 | emeta->nr_entries = lm->emeta_sec[0]; | |
943 | l_mg->eline_meta[i] = emeta; | |
944 | } | |
945 | } | |
946 | ||
dd2a4343 JG |
947 | for (i = 0; i < l_mg->nr_lines; i++) |
948 | l_mg->vsc_list[i] = cpu_to_le32(EMPTY_ENTRY); | |
949 | ||
43d47127 JG |
950 | bb_distance = (geo->all_luns) * geo->ws_opt; |
951 | for (i = 0; i < lm->sec_per_line; i += bb_distance) | |
952 | bitmap_set(l_mg->bb_template, i, geo->ws_opt); | |
953 | ||
dd2a4343 JG |
954 | return 0; |
955 | ||
956 | fail_free_emeta: | |
957 | while (--i >= 0) { | |
c9d84b35 RP |
958 | if (l_mg->emeta_alloc_type == PBLK_VMALLOC_META) |
959 | vfree(l_mg->eline_meta[i]->buf); | |
960 | else | |
961 | kfree(l_mg->eline_meta[i]->buf); | |
f680f19a | 962 | kfree(l_mg->eline_meta[i]); |
dd2a4343 | 963 | } |
dd2a4343 JG |
964 | fail_free_smeta: |
965 | for (i = 0; i < PBLK_DATA_LINES; i++) | |
f680f19a | 966 | kfree(l_mg->sline_meta[i]); |
43d47127 JG |
967 | kfree(l_mg->bb_aux); |
968 | fail_free_bb_template: | |
969 | kfree(l_mg->bb_template); | |
970 | fail_free_vsc_list: | |
971 | kfree(l_mg->vsc_list); | |
972 | fail: | |
dd2a4343 JG |
973 | return -ENOMEM; |
974 | } | |
975 | ||
43d47127 | 976 | static int pblk_line_meta_init(struct pblk *pblk) |
a4bd217b JG |
977 | { |
978 | struct nvm_tgt_dev *dev = pblk->dev; | |
979 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b | 980 | struct pblk_line_meta *lm = &pblk->lm; |
a4bd217b | 981 | unsigned int smeta_len, emeta_len; |
43d47127 | 982 | int i; |
a4bd217b | 983 | |
e46f4e48 | 984 | lm->sec_per_line = geo->clba * geo->all_luns; |
fae7fae4 MB |
985 | lm->blk_per_line = geo->all_luns; |
986 | lm->blk_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); | |
a4bd217b | 987 | lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long); |
fae7fae4 | 988 | lm->lun_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); |
27b97872 RP |
989 | lm->mid_thrs = lm->sec_per_line / 2; |
990 | lm->high_thrs = lm->sec_per_line / 4; | |
fae7fae4 | 991 | lm->meta_distance = (geo->all_luns / 2) * pblk->min_write_pgs; |
a4bd217b JG |
992 | |
993 | /* Calculate necessary pages for smeta. See comment over struct | |
994 | * line_smeta definition | |
995 | */ | |
a4bd217b JG |
996 | i = 1; |
997 | add_smeta_page: | |
e46f4e48 JG |
998 | lm->smeta_sec = i * geo->ws_opt; |
999 | lm->smeta_len = lm->smeta_sec * geo->csecs; | |
a4bd217b | 1000 | |
dd2a4343 | 1001 | smeta_len = sizeof(struct line_smeta) + lm->lun_bitmap_len; |
a4bd217b JG |
1002 | if (smeta_len > lm->smeta_len) { |
1003 | i++; | |
1004 | goto add_smeta_page; | |
1005 | } | |
1006 | ||
1007 | /* Calculate necessary pages for emeta. See comment over struct | |
1008 | * line_emeta definition | |
1009 | */ | |
1010 | i = 1; | |
1011 | add_emeta_page: | |
e46f4e48 JG |
1012 | lm->emeta_sec[0] = i * geo->ws_opt; |
1013 | lm->emeta_len[0] = lm->emeta_sec[0] * geo->csecs; | |
a4bd217b | 1014 | |
dd2a4343 JG |
1015 | emeta_len = calc_emeta_len(pblk); |
1016 | if (emeta_len > lm->emeta_len[0]) { | |
a4bd217b JG |
1017 | i++; |
1018 | goto add_emeta_page; | |
1019 | } | |
a4bd217b | 1020 | |
fae7fae4 | 1021 | lm->emeta_bb = geo->all_luns > i ? geo->all_luns - i : 0; |
21d22871 JG |
1022 | |
1023 | lm->min_blk_line = 1; | |
fae7fae4 | 1024 | if (geo->all_luns > 1) |
21d22871 | 1025 | lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec + |
e46f4e48 | 1026 | lm->emeta_sec[0], geo->clba); |
21d22871 | 1027 | |
b5e063a2 JG |
1028 | if (lm->min_blk_line > lm->blk_per_line) { |
1029 | pr_err("pblk: config. not supported. Min. LUN in line:%d\n", | |
1030 | lm->blk_per_line); | |
e411b331 | 1031 | return -EINVAL; |
b5e063a2 | 1032 | } |
a4bd217b | 1033 | |
43d47127 JG |
1034 | return 0; |
1035 | } | |
1036 | ||
1037 | static int pblk_lines_init(struct pblk *pblk) | |
1038 | { | |
1039 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
43d47127 | 1040 | struct pblk_line *line; |
32ef9412 JG |
1041 | void *chunk_meta; |
1042 | long nr_free_chks = 0; | |
43d47127 JG |
1043 | int i, ret; |
1044 | ||
1045 | ret = pblk_line_meta_init(pblk); | |
dd2a4343 | 1046 | if (ret) |
e411b331 | 1047 | return ret; |
a4bd217b | 1048 | |
43d47127 JG |
1049 | ret = pblk_line_mg_init(pblk); |
1050 | if (ret) | |
1051 | return ret; | |
1052 | ||
1053 | ret = pblk_luns_init(pblk); | |
1054 | if (ret) | |
a4bd217b JG |
1055 | goto fail_free_meta; |
1056 | ||
32ef9412 JG |
1057 | chunk_meta = pblk_chunk_get_meta(pblk); |
1058 | if (IS_ERR(chunk_meta)) { | |
1059 | ret = PTR_ERR(chunk_meta); | |
43d47127 | 1060 | goto fail_free_luns; |
1c6286f2 | 1061 | } |
a4bd217b | 1062 | |
a4bd217b JG |
1063 | pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line), |
1064 | GFP_KERNEL); | |
1c6286f2 DC |
1065 | if (!pblk->lines) { |
1066 | ret = -ENOMEM; | |
32ef9412 | 1067 | goto fail_free_chunk_meta; |
e411b331 JG |
1068 | } |
1069 | ||
a4bd217b JG |
1070 | for (i = 0; i < l_mg->nr_lines; i++) { |
1071 | line = &pblk->lines[i]; | |
1072 | ||
32ef9412 | 1073 | ret = pblk_alloc_line_meta(pblk, line); |
dffdd960 | 1074 | if (ret) |
43d47127 | 1075 | goto fail_free_lines; |
dffdd960 | 1076 | |
32ef9412 | 1077 | nr_free_chks += pblk_setup_line_meta(pblk, line, chunk_meta, i); |
a4bd217b JG |
1078 | } |
1079 | ||
2deeefc0 JG |
1080 | if (!nr_free_chks) { |
1081 | pr_err("pblk: too many bad blocks prevent for sane instance\n"); | |
1082 | return -EINTR; | |
1083 | } | |
1084 | ||
32ef9412 | 1085 | pblk_set_provision(pblk, nr_free_chks); |
a4bd217b | 1086 | |
32ef9412 | 1087 | kfree(chunk_meta); |
a4bd217b | 1088 | return 0; |
e411b331 | 1089 | |
43d47127 | 1090 | fail_free_lines: |
dffdd960 | 1091 | while (--i >= 0) |
48b8d208 | 1092 | pblk_line_meta_free(l_mg, &pblk->lines[i]); |
43d47127 | 1093 | kfree(pblk->lines); |
32ef9412 JG |
1094 | fail_free_chunk_meta: |
1095 | kfree(chunk_meta); | |
43d47127 JG |
1096 | fail_free_luns: |
1097 | kfree(pblk->luns); | |
a4bd217b | 1098 | fail_free_meta: |
e411b331 | 1099 | pblk_line_mg_free(pblk); |
a4bd217b JG |
1100 | |
1101 | return ret; | |
1102 | } | |
1103 | ||
1104 | static int pblk_writer_init(struct pblk *pblk) | |
1105 | { | |
a4bd217b JG |
1106 | pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t"); |
1107 | if (IS_ERR(pblk->writer_ts)) { | |
cc4f5ba1 JG |
1108 | int err = PTR_ERR(pblk->writer_ts); |
1109 | ||
1110 | if (err != -EINTR) | |
1111 | pr_err("pblk: could not allocate writer kthread (%d)\n", | |
1112 | err); | |
1113 | return err; | |
a4bd217b JG |
1114 | } |
1115 | ||
cc4f5ba1 JG |
1116 | timer_setup(&pblk->wtimer, pblk_write_timer_fn, 0); |
1117 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); | |
1118 | ||
a4bd217b JG |
1119 | return 0; |
1120 | } | |
1121 | ||
1122 | static void pblk_writer_stop(struct pblk *pblk) | |
1123 | { | |
ee8d5c1a JG |
1124 | /* The pipeline must be stopped and the write buffer emptied before the |
1125 | * write thread is stopped | |
1126 | */ | |
1127 | WARN(pblk_rb_read_count(&pblk->rwb), | |
1128 | "Stopping not fully persisted write buffer\n"); | |
1129 | ||
1130 | WARN(pblk_rb_sync_count(&pblk->rwb), | |
1131 | "Stopping not fully synced write buffer\n"); | |
1132 | ||
7be970b2 | 1133 | del_timer_sync(&pblk->wtimer); |
a4bd217b JG |
1134 | if (pblk->writer_ts) |
1135 | kthread_stop(pblk->writer_ts); | |
a4bd217b JG |
1136 | } |
1137 | ||
1138 | static void pblk_free(struct pblk *pblk) | |
1139 | { | |
a4bd217b | 1140 | pblk_lines_free(pblk); |
a4bd217b | 1141 | pblk_l2p_free(pblk); |
43d47127 JG |
1142 | pblk_rwb_free(pblk); |
1143 | pblk_core_free(pblk); | |
a4bd217b JG |
1144 | |
1145 | kfree(pblk); | |
1146 | } | |
1147 | ||
a7c9e910 | 1148 | static void pblk_tear_down(struct pblk *pblk, bool graceful) |
a4bd217b | 1149 | { |
a7c9e910 JG |
1150 | if (graceful) |
1151 | __pblk_pipeline_flush(pblk); | |
1152 | __pblk_pipeline_stop(pblk); | |
a4bd217b JG |
1153 | pblk_writer_stop(pblk); |
1154 | pblk_rb_sync_l2p(&pblk->rwb); | |
a4bd217b JG |
1155 | pblk_rl_free(&pblk->rl); |
1156 | ||
a7c9e910 | 1157 | pr_debug("pblk: consistent tear down (graceful:%d)\n", graceful); |
a4bd217b JG |
1158 | } |
1159 | ||
a7c9e910 | 1160 | static void pblk_exit(void *private, bool graceful) |
a4bd217b JG |
1161 | { |
1162 | struct pblk *pblk = private; | |
1163 | ||
1164 | down_write(&pblk_lock); | |
a7c9e910 JG |
1165 | pblk_gc_exit(pblk, graceful); |
1166 | pblk_tear_down(pblk, graceful); | |
c5586192 HH |
1167 | |
1168 | #ifdef CONFIG_NVM_DEBUG | |
1169 | pr_info("pblk exit: L2P CRC: %x\n", pblk_l2p_crc(pblk)); | |
1170 | #endif | |
1171 | ||
a4bd217b JG |
1172 | pblk_free(pblk); |
1173 | up_write(&pblk_lock); | |
1174 | } | |
1175 | ||
1176 | static sector_t pblk_capacity(void *private) | |
1177 | { | |
1178 | struct pblk *pblk = private; | |
1179 | ||
1180 | return pblk->capacity * NR_PHY_IN_LOG; | |
1181 | } | |
1182 | ||
1183 | static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, | |
1184 | int flags) | |
1185 | { | |
1186 | struct nvm_geo *geo = &dev->geo; | |
1187 | struct request_queue *bqueue = dev->q; | |
1188 | struct request_queue *tqueue = tdisk->queue; | |
1189 | struct pblk *pblk; | |
1190 | int ret; | |
1191 | ||
3b2a3ad1 JG |
1192 | /* pblk supports 1.2 and 2.0 versions */ |
1193 | if (!(geo->version == NVM_OCSSD_SPEC_12 || | |
1194 | geo->version == NVM_OCSSD_SPEC_20)) { | |
7ad5039e JG |
1195 | pr_err("pblk: OCSSD version not supported (%u)\n", |
1196 | geo->version); | |
1197 | return ERR_PTR(-EINVAL); | |
1198 | } | |
1199 | ||
1200 | if (geo->version == NVM_OCSSD_SPEC_12 && geo->dom & NVM_RSP_L2P) { | |
4e76af53 | 1201 | pr_err("pblk: host-side L2P table not supported. (%x)\n", |
7ad5039e | 1202 | geo->dom); |
a4bd217b JG |
1203 | return ERR_PTR(-EINVAL); |
1204 | } | |
1205 | ||
1206 | pblk = kzalloc(sizeof(struct pblk), GFP_KERNEL); | |
1207 | if (!pblk) | |
1208 | return ERR_PTR(-ENOMEM); | |
1209 | ||
1210 | pblk->dev = dev; | |
1211 | pblk->disk = tdisk; | |
588726d3 | 1212 | pblk->state = PBLK_STATE_RUNNING; |
3e3a5b8e | 1213 | pblk->gc.gc_enabled = 0; |
a4bd217b | 1214 | |
6a3abf5b | 1215 | spin_lock_init(&pblk->resubmit_lock); |
a4bd217b JG |
1216 | spin_lock_init(&pblk->trans_lock); |
1217 | spin_lock_init(&pblk->lock); | |
1218 | ||
a4bd217b JG |
1219 | #ifdef CONFIG_NVM_DEBUG |
1220 | atomic_long_set(&pblk->inflight_writes, 0); | |
1221 | atomic_long_set(&pblk->padded_writes, 0); | |
1222 | atomic_long_set(&pblk->padded_wb, 0); | |
a4bd217b JG |
1223 | atomic_long_set(&pblk->req_writes, 0); |
1224 | atomic_long_set(&pblk->sub_writes, 0); | |
1225 | atomic_long_set(&pblk->sync_writes, 0); | |
a4bd217b | 1226 | atomic_long_set(&pblk->inflight_reads, 0); |
db7ada33 | 1227 | atomic_long_set(&pblk->cache_reads, 0); |
a4bd217b JG |
1228 | atomic_long_set(&pblk->sync_reads, 0); |
1229 | atomic_long_set(&pblk->recov_writes, 0); | |
1230 | atomic_long_set(&pblk->recov_writes, 0); | |
1231 | atomic_long_set(&pblk->recov_gc_writes, 0); | |
a1121176 | 1232 | atomic_long_set(&pblk->recov_gc_reads, 0); |
a4bd217b JG |
1233 | #endif |
1234 | ||
1235 | atomic_long_set(&pblk->read_failed, 0); | |
1236 | atomic_long_set(&pblk->read_empty, 0); | |
1237 | atomic_long_set(&pblk->read_high_ecc, 0); | |
1238 | atomic_long_set(&pblk->read_failed_gc, 0); | |
1239 | atomic_long_set(&pblk->write_failed, 0); | |
1240 | atomic_long_set(&pblk->erase_failed, 0); | |
1241 | ||
43d47127 | 1242 | ret = pblk_core_init(pblk); |
a4bd217b | 1243 | if (ret) { |
43d47127 | 1244 | pr_err("pblk: could not initialize core\n"); |
a4bd217b JG |
1245 | goto fail; |
1246 | } | |
1247 | ||
1248 | ret = pblk_lines_init(pblk); | |
1249 | if (ret) { | |
1250 | pr_err("pblk: could not initialize lines\n"); | |
43d47127 | 1251 | goto fail_free_core; |
5d149bfa HH |
1252 | } |
1253 | ||
43d47127 | 1254 | ret = pblk_rwb_init(pblk); |
a4bd217b | 1255 | if (ret) { |
43d47127 JG |
1256 | pr_err("pblk: could not initialize write buffer\n"); |
1257 | goto fail_free_lines; | |
a4bd217b JG |
1258 | } |
1259 | ||
43d47127 | 1260 | ret = pblk_l2p_init(pblk, flags & NVM_TARGET_FACTORY); |
a4bd217b JG |
1261 | if (ret) { |
1262 | pr_err("pblk: could not initialize maps\n"); | |
43d47127 | 1263 | goto fail_free_rwb; |
a4bd217b JG |
1264 | } |
1265 | ||
1266 | ret = pblk_writer_init(pblk); | |
1267 | if (ret) { | |
cc4f5ba1 JG |
1268 | if (ret != -EINTR) |
1269 | pr_err("pblk: could not initialize write thread\n"); | |
43d47127 | 1270 | goto fail_free_l2p; |
a4bd217b JG |
1271 | } |
1272 | ||
1273 | ret = pblk_gc_init(pblk); | |
1274 | if (ret) { | |
1275 | pr_err("pblk: could not initialize gc\n"); | |
1276 | goto fail_stop_writer; | |
1277 | } | |
1278 | ||
1279 | /* inherit the size from the underlying device */ | |
1280 | blk_queue_logical_block_size(tqueue, queue_physical_block_size(bqueue)); | |
1281 | blk_queue_max_hw_sectors(tqueue, queue_max_hw_sectors(bqueue)); | |
1282 | ||
1283 | blk_queue_write_cache(tqueue, true, false); | |
1284 | ||
e46f4e48 | 1285 | tqueue->limits.discard_granularity = geo->clba * geo->csecs; |
a4bd217b JG |
1286 | tqueue->limits.discard_alignment = 0; |
1287 | blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); | |
8b904b5b | 1288 | blk_queue_flag_set(QUEUE_FLAG_DISCARD, tqueue); |
a4bd217b | 1289 | |
30d82a86 JG |
1290 | pr_info("pblk(%s): luns:%u, lines:%d, secs:%llu, buf entries:%u\n", |
1291 | tdisk->disk_name, | |
fae7fae4 | 1292 | geo->all_luns, pblk->l_mg.nr_lines, |
a4bd217b JG |
1293 | (unsigned long long)pblk->rl.nr_secs, |
1294 | pblk->rwb.nr_entries); | |
1295 | ||
1296 | wake_up_process(pblk->writer_ts); | |
03661b5f HH |
1297 | |
1298 | /* Check if we need to start GC */ | |
1299 | pblk_gc_should_kick(pblk); | |
1300 | ||
a4bd217b JG |
1301 | return pblk; |
1302 | ||
1303 | fail_stop_writer: | |
1304 | pblk_writer_stop(pblk); | |
a4bd217b JG |
1305 | fail_free_l2p: |
1306 | pblk_l2p_free(pblk); | |
43d47127 JG |
1307 | fail_free_rwb: |
1308 | pblk_rwb_free(pblk); | |
1309 | fail_free_lines: | |
1310 | pblk_lines_free(pblk); | |
a4bd217b JG |
1311 | fail_free_core: |
1312 | pblk_core_free(pblk); | |
a4bd217b JG |
1313 | fail: |
1314 | kfree(pblk); | |
1315 | return ERR_PTR(ret); | |
1316 | } | |
1317 | ||
1318 | /* physical block device target */ | |
1319 | static struct nvm_tgt_type tt_pblk = { | |
1320 | .name = "pblk", | |
1321 | .version = {1, 0, 0}, | |
1322 | ||
1323 | .make_rq = pblk_make_rq, | |
1324 | .capacity = pblk_capacity, | |
1325 | ||
1326 | .init = pblk_init, | |
1327 | .exit = pblk_exit, | |
1328 | ||
1329 | .sysfs_init = pblk_sysfs_init, | |
1330 | .sysfs_exit = pblk_sysfs_exit, | |
90014829 | 1331 | .owner = THIS_MODULE, |
a4bd217b JG |
1332 | }; |
1333 | ||
1334 | static int __init pblk_module_init(void) | |
1335 | { | |
b25d5237 N |
1336 | int ret; |
1337 | ||
b906bbb6 KO |
1338 | ret = bioset_init(&pblk_bio_set, BIO_POOL_SIZE, 0, 0); |
1339 | if (ret) | |
1340 | return ret; | |
b25d5237 N |
1341 | ret = nvm_register_tgt_type(&tt_pblk); |
1342 | if (ret) | |
b906bbb6 | 1343 | bioset_exit(&pblk_bio_set); |
b25d5237 | 1344 | return ret; |
a4bd217b JG |
1345 | } |
1346 | ||
1347 | static void pblk_module_exit(void) | |
1348 | { | |
b906bbb6 | 1349 | bioset_exit(&pblk_bio_set); |
a4bd217b JG |
1350 | nvm_unregister_tgt_type(&tt_pblk); |
1351 | } | |
1352 | ||
1353 | module_init(pblk_module_init); | |
1354 | module_exit(pblk_module_exit); | |
1355 | MODULE_AUTHOR("Javier Gonzalez <javier@cnexlabs.com>"); | |
1356 | MODULE_AUTHOR("Matias Bjorling <matias@cnexlabs.com>"); | |
1357 | MODULE_LICENSE("GPL v2"); | |
1358 | MODULE_DESCRIPTION("Physical Block-Device for Open-Channel SSDs"); |