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