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 | ||
880eda54 | 94 | #ifdef CONFIG_NVM_PBLK_DEBUG |
c5586192 HH |
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)) { | |
4e495a46 | 120 | pblk_err(pblk, "could not recover l2p table\n"); |
43d47127 JG |
121 | return -EFAULT; |
122 | } | |
123 | } | |
124 | ||
880eda54 | 125 | #ifdef CONFIG_NVM_PBLK_DEBUG |
4e495a46 | 126 | pblk_info(pblk, "init: L2P CRC: %x\n", pblk_l2p_crc(pblk)); |
43d47127 JG |
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)) | |
4e495a46 | 169 | pblk_err(pblk, "write buffer error on tear down\n"); |
a4bd217b JG |
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 | 181 | unsigned int power_size, power_seg_sz; |
ffc03fb7 | 182 | int pgs_in_buffer; |
a4bd217b | 183 | |
ffc03fb7 MD |
184 | pgs_in_buffer = max(geo->mw_cunits, geo->ws_opt) * geo->all_luns; |
185 | ||
186 | if (write_buffer_size && (write_buffer_size > pgs_in_buffer)) | |
4a828884 MD |
187 | buffer_size = write_buffer_size; |
188 | else | |
ffc03fb7 | 189 | buffer_size = pgs_in_buffer; |
4a828884 MD |
190 | |
191 | nr_entries = pblk_rb_calculate_size(buffer_size); | |
a4bd217b | 192 | |
fad953ce | 193 | entries = vzalloc(array_size(nr_entries, sizeof(struct pblk_rb_entry))); |
a4bd217b JG |
194 | if (!entries) |
195 | return -ENOMEM; | |
196 | ||
197 | power_size = get_count_order(nr_entries); | |
e46f4e48 | 198 | power_seg_sz = get_count_order(geo->csecs); |
a4bd217b JG |
199 | |
200 | return pblk_rb_init(&pblk->rwb, entries, power_size, power_seg_sz); | |
201 | } | |
202 | ||
203 | /* Minimum pages needed within a lun */ | |
a4bd217b JG |
204 | #define ADDR_POOL_SIZE 64 |
205 | ||
4e495a46 MB |
206 | static int pblk_set_addrf_12(struct pblk *pblk, struct nvm_geo *geo, |
207 | struct nvm_addrf_12 *dst) | |
a4bd217b | 208 | { |
e46f4e48 JG |
209 | struct nvm_addrf_12 *src = (struct nvm_addrf_12 *)&geo->addrf; |
210 | int power_len; | |
a4bd217b JG |
211 | |
212 | /* Re-calculate channel and lun format to adapt to configuration */ | |
a40afad9 JG |
213 | power_len = get_count_order(geo->num_ch); |
214 | if (1 << power_len != geo->num_ch) { | |
4e495a46 | 215 | pblk_err(pblk, "supports only power-of-two channel config.\n"); |
a4bd217b JG |
216 | return -EINVAL; |
217 | } | |
e46f4e48 | 218 | dst->ch_len = power_len; |
a4bd217b | 219 | |
a40afad9 JG |
220 | power_len = get_count_order(geo->num_lun); |
221 | if (1 << power_len != geo->num_lun) { | |
4e495a46 | 222 | pblk_err(pblk, "supports only power-of-two LUN config.\n"); |
a4bd217b JG |
223 | return -EINVAL; |
224 | } | |
e46f4e48 JG |
225 | dst->lun_len = power_len; |
226 | ||
227 | dst->blk_len = src->blk_len; | |
228 | dst->pg_len = src->pg_len; | |
229 | dst->pln_len = src->pln_len; | |
a40afad9 | 230 | dst->sec_len = src->sec_len; |
e46f4e48 | 231 | |
a40afad9 JG |
232 | dst->sec_offset = 0; |
233 | dst->pln_offset = dst->sec_len; | |
e46f4e48 JG |
234 | dst->ch_offset = dst->pln_offset + dst->pln_len; |
235 | dst->lun_offset = dst->ch_offset + dst->ch_len; | |
236 | dst->pg_offset = dst->lun_offset + dst->lun_len; | |
237 | dst->blk_offset = dst->pg_offset + dst->pg_len; | |
238 | ||
a40afad9 | 239 | dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset; |
e46f4e48 JG |
240 | dst->pln_mask = ((1ULL << dst->pln_len) - 1) << dst->pln_offset; |
241 | dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset; | |
242 | dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset; | |
243 | dst->pg_mask = ((1ULL << dst->pg_len) - 1) << dst->pg_offset; | |
244 | dst->blk_mask = ((1ULL << dst->blk_len) - 1) << dst->blk_offset; | |
245 | ||
246 | return dst->blk_offset + src->blk_len; | |
247 | } | |
248 | ||
3b2a3ad1 JG |
249 | static int pblk_set_addrf_20(struct nvm_geo *geo, struct nvm_addrf *adst, |
250 | struct pblk_addrf *udst) | |
251 | { | |
252 | struct nvm_addrf *src = &geo->addrf; | |
253 | ||
254 | adst->ch_len = get_count_order(geo->num_ch); | |
255 | adst->lun_len = get_count_order(geo->num_lun); | |
256 | adst->chk_len = src->chk_len; | |
257 | adst->sec_len = src->sec_len; | |
258 | ||
259 | adst->sec_offset = 0; | |
260 | adst->ch_offset = adst->sec_len; | |
261 | adst->lun_offset = adst->ch_offset + adst->ch_len; | |
262 | adst->chk_offset = adst->lun_offset + adst->lun_len; | |
263 | ||
264 | adst->sec_mask = ((1ULL << adst->sec_len) - 1) << adst->sec_offset; | |
265 | adst->chk_mask = ((1ULL << adst->chk_len) - 1) << adst->chk_offset; | |
266 | adst->lun_mask = ((1ULL << adst->lun_len) - 1) << adst->lun_offset; | |
267 | adst->ch_mask = ((1ULL << adst->ch_len) - 1) << adst->ch_offset; | |
268 | ||
269 | udst->sec_stripe = geo->ws_opt; | |
270 | udst->ch_stripe = geo->num_ch; | |
271 | udst->lun_stripe = geo->num_lun; | |
272 | ||
273 | udst->sec_lun_stripe = udst->sec_stripe * udst->ch_stripe; | |
274 | udst->sec_ws_stripe = udst->sec_lun_stripe * udst->lun_stripe; | |
275 | ||
276 | return adst->chk_offset + adst->chk_len; | |
277 | } | |
278 | ||
bb845ae4 | 279 | static int pblk_set_addrf(struct pblk *pblk) |
e46f4e48 JG |
280 | { |
281 | struct nvm_tgt_dev *dev = pblk->dev; | |
282 | struct nvm_geo *geo = &dev->geo; | |
283 | int mod; | |
284 | ||
3b2a3ad1 JG |
285 | switch (geo->version) { |
286 | case NVM_OCSSD_SPEC_12: | |
287 | div_u64_rem(geo->clba, pblk->min_write_pgs, &mod); | |
288 | if (mod) { | |
4e495a46 | 289 | pblk_err(pblk, "bad configuration of sectors/pages\n"); |
3b2a3ad1 JG |
290 | return -EINVAL; |
291 | } | |
292 | ||
4e495a46 MB |
293 | pblk->addrf_len = pblk_set_addrf_12(pblk, geo, |
294 | (void *)&pblk->addrf); | |
3b2a3ad1 JG |
295 | break; |
296 | case NVM_OCSSD_SPEC_20: | |
297 | pblk->addrf_len = pblk_set_addrf_20(geo, (void *)&pblk->addrf, | |
4e495a46 | 298 | &pblk->uaddrf); |
3b2a3ad1 JG |
299 | break; |
300 | default: | |
4e495a46 | 301 | pblk_err(pblk, "OCSSD revision not supported (%d)\n", |
3b2a3ad1 | 302 | geo->version); |
e46f4e48 JG |
303 | return -EINVAL; |
304 | } | |
305 | ||
a4bd217b JG |
306 | return 0; |
307 | } | |
308 | ||
309 | static int pblk_init_global_caches(struct pblk *pblk) | |
310 | { | |
a4bd217b | 311 | down_write(&pblk_lock); |
b84ae4a8 | 312 | pblk_ws_cache = kmem_cache_create("pblk_blk_ws", |
a4bd217b | 313 | sizeof(struct pblk_line_ws), 0, 0, NULL); |
b84ae4a8 | 314 | if (!pblk_ws_cache) { |
a4bd217b JG |
315 | up_write(&pblk_lock); |
316 | return -ENOMEM; | |
317 | } | |
318 | ||
319 | pblk_rec_cache = kmem_cache_create("pblk_rec", | |
320 | sizeof(struct pblk_rec_ctx), 0, 0, NULL); | |
321 | if (!pblk_rec_cache) { | |
b84ae4a8 | 322 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
323 | up_write(&pblk_lock); |
324 | return -ENOMEM; | |
325 | } | |
326 | ||
084ec9ba | 327 | pblk_g_rq_cache = kmem_cache_create("pblk_g_rq", pblk_g_rq_size, |
a4bd217b | 328 | 0, 0, NULL); |
084ec9ba | 329 | if (!pblk_g_rq_cache) { |
b84ae4a8 | 330 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
331 | kmem_cache_destroy(pblk_rec_cache); |
332 | up_write(&pblk_lock); | |
333 | return -ENOMEM; | |
334 | } | |
335 | ||
336 | pblk_w_rq_cache = kmem_cache_create("pblk_w_rq", pblk_w_rq_size, | |
337 | 0, 0, NULL); | |
338 | if (!pblk_w_rq_cache) { | |
b84ae4a8 | 339 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b | 340 | kmem_cache_destroy(pblk_rec_cache); |
084ec9ba | 341 | kmem_cache_destroy(pblk_g_rq_cache); |
a4bd217b JG |
342 | up_write(&pblk_lock); |
343 | return -ENOMEM; | |
344 | } | |
a4bd217b JG |
345 | up_write(&pblk_lock); |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
22a4e061 RP |
350 | static void pblk_free_global_caches(struct pblk *pblk) |
351 | { | |
352 | kmem_cache_destroy(pblk_ws_cache); | |
353 | kmem_cache_destroy(pblk_rec_cache); | |
354 | kmem_cache_destroy(pblk_g_rq_cache); | |
355 | kmem_cache_destroy(pblk_w_rq_cache); | |
356 | } | |
357 | ||
a4bd217b JG |
358 | static int pblk_core_init(struct pblk *pblk) |
359 | { | |
360 | struct nvm_tgt_dev *dev = pblk->dev; | |
361 | struct nvm_geo *geo = &dev->geo; | |
b906bbb6 | 362 | int ret, max_write_ppas; |
43d47127 JG |
363 | |
364 | atomic64_set(&pblk->user_wa, 0); | |
365 | atomic64_set(&pblk->pad_wa, 0); | |
366 | atomic64_set(&pblk->gc_wa, 0); | |
367 | pblk->user_rst_wa = 0; | |
368 | pblk->pad_rst_wa = 0; | |
369 | pblk->gc_rst_wa = 0; | |
370 | ||
371 | atomic64_set(&pblk->nr_flush, 0); | |
372 | pblk->nr_flush_rst = 0; | |
a4bd217b | 373 | |
e46f4e48 | 374 | pblk->min_write_pgs = geo->ws_opt * (geo->csecs / PAGE_SIZE); |
43d47127 JG |
375 | max_write_ppas = pblk->min_write_pgs * geo->all_luns; |
376 | pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA); | |
377 | pblk_set_sec_per_write(pblk, pblk->min_write_pgs); | |
378 | ||
379 | if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) { | |
4e495a46 | 380 | pblk_err(pblk, "vector list too big(%u > %u)\n", |
43d47127 JG |
381 | pblk->max_write_pgs, PBLK_MAX_REQ_ADDRS); |
382 | return -EINVAL; | |
383 | } | |
384 | ||
6396bb22 | 385 | pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1, sizeof(atomic64_t), |
43d47127 JG |
386 | GFP_KERNEL); |
387 | if (!pblk->pad_dist) | |
a4bd217b JG |
388 | return -ENOMEM; |
389 | ||
43d47127 JG |
390 | if (pblk_init_global_caches(pblk)) |
391 | goto fail_free_pad_dist; | |
392 | ||
b84ae4a8 | 393 | /* Internal bios can be at most the sectors signaled by the device. */ |
b906bbb6 KO |
394 | ret = mempool_init_page_pool(&pblk->page_bio_pool, NVM_MAX_VLBA, 0); |
395 | if (ret) | |
22a4e061 | 396 | goto free_global_caches; |
a4bd217b | 397 | |
b906bbb6 KO |
398 | ret = mempool_init_slab_pool(&pblk->gen_ws_pool, PBLK_GEN_WS_POOL_SIZE, |
399 | pblk_ws_cache); | |
400 | if (ret) | |
bd432417 | 401 | goto free_page_bio_pool; |
a4bd217b | 402 | |
b906bbb6 KO |
403 | ret = mempool_init_slab_pool(&pblk->rec_pool, geo->all_luns, |
404 | pblk_rec_cache); | |
405 | if (ret) | |
b84ae4a8 | 406 | goto free_gen_ws_pool; |
a4bd217b | 407 | |
b906bbb6 KO |
408 | ret = mempool_init_slab_pool(&pblk->r_rq_pool, geo->all_luns, |
409 | pblk_g_rq_cache); | |
410 | if (ret) | |
a4bd217b JG |
411 | goto free_rec_pool; |
412 | ||
b906bbb6 KO |
413 | ret = mempool_init_slab_pool(&pblk->e_rq_pool, geo->all_luns, |
414 | pblk_g_rq_cache); | |
415 | if (ret) | |
0d880398 JG |
416 | goto free_r_rq_pool; |
417 | ||
b906bbb6 KO |
418 | ret = mempool_init_slab_pool(&pblk->w_rq_pool, geo->all_luns, |
419 | pblk_w_rq_cache); | |
420 | if (ret) | |
0d880398 | 421 | goto free_e_rq_pool; |
a4bd217b | 422 | |
ef576494 JG |
423 | pblk->close_wq = alloc_workqueue("pblk-close-wq", |
424 | WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_NR_CLOSE_JOBS); | |
425 | if (!pblk->close_wq) | |
e72ec1d3 | 426 | goto free_w_rq_pool; |
a4bd217b | 427 | |
ef576494 JG |
428 | pblk->bb_wq = alloc_workqueue("pblk-bb-wq", |
429 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
430 | if (!pblk->bb_wq) | |
431 | goto free_close_wq; | |
432 | ||
7bd4d370 JG |
433 | pblk->r_end_wq = alloc_workqueue("pblk-read-end-wq", |
434 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
435 | if (!pblk->r_end_wq) | |
ef576494 | 436 | goto free_bb_wq; |
a4bd217b | 437 | |
bb845ae4 | 438 | if (pblk_set_addrf(pblk)) |
7bd4d370 JG |
439 | goto free_r_end_wq; |
440 | ||
a4bd217b | 441 | INIT_LIST_HEAD(&pblk->compl_list); |
6a3abf5b | 442 | INIT_LIST_HEAD(&pblk->resubmit_list); |
43d47127 | 443 | |
a4bd217b JG |
444 | return 0; |
445 | ||
7bd4d370 JG |
446 | free_r_end_wq: |
447 | destroy_workqueue(pblk->r_end_wq); | |
ef576494 JG |
448 | free_bb_wq: |
449 | destroy_workqueue(pblk->bb_wq); | |
450 | free_close_wq: | |
451 | destroy_workqueue(pblk->close_wq); | |
a4bd217b | 452 | free_w_rq_pool: |
b906bbb6 | 453 | mempool_exit(&pblk->w_rq_pool); |
0d880398 | 454 | free_e_rq_pool: |
b906bbb6 | 455 | mempool_exit(&pblk->e_rq_pool); |
0d880398 | 456 | free_r_rq_pool: |
b906bbb6 | 457 | mempool_exit(&pblk->r_rq_pool); |
a4bd217b | 458 | free_rec_pool: |
b906bbb6 | 459 | mempool_exit(&pblk->rec_pool); |
b84ae4a8 | 460 | free_gen_ws_pool: |
b906bbb6 | 461 | mempool_exit(&pblk->gen_ws_pool); |
bd432417 | 462 | free_page_bio_pool: |
b906bbb6 | 463 | mempool_exit(&pblk->page_bio_pool); |
22a4e061 RP |
464 | free_global_caches: |
465 | pblk_free_global_caches(pblk); | |
43d47127 JG |
466 | fail_free_pad_dist: |
467 | kfree(pblk->pad_dist); | |
a4bd217b JG |
468 | return -ENOMEM; |
469 | } | |
470 | ||
471 | static void pblk_core_free(struct pblk *pblk) | |
472 | { | |
ef576494 JG |
473 | if (pblk->close_wq) |
474 | destroy_workqueue(pblk->close_wq); | |
475 | ||
7bd4d370 JG |
476 | if (pblk->r_end_wq) |
477 | destroy_workqueue(pblk->r_end_wq); | |
478 | ||
ef576494 JG |
479 | if (pblk->bb_wq) |
480 | destroy_workqueue(pblk->bb_wq); | |
a4bd217b | 481 | |
b906bbb6 KO |
482 | mempool_exit(&pblk->page_bio_pool); |
483 | mempool_exit(&pblk->gen_ws_pool); | |
484 | mempool_exit(&pblk->rec_pool); | |
485 | mempool_exit(&pblk->r_rq_pool); | |
486 | mempool_exit(&pblk->e_rq_pool); | |
487 | mempool_exit(&pblk->w_rq_pool); | |
a4bd217b | 488 | |
22a4e061 | 489 | pblk_free_global_caches(pblk); |
43d47127 | 490 | kfree(pblk->pad_dist); |
a4bd217b JG |
491 | } |
492 | ||
e411b331 JG |
493 | static void pblk_line_mg_free(struct pblk *pblk) |
494 | { | |
495 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
496 | int i; | |
497 | ||
498 | kfree(l_mg->bb_template); | |
499 | kfree(l_mg->bb_aux); | |
500 | kfree(l_mg->vsc_list); | |
501 | ||
502 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
503 | kfree(l_mg->sline_meta[i]); | |
504 | pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type); | |
505 | kfree(l_mg->eline_meta[i]); | |
506 | } | |
e411b331 JG |
507 | } |
508 | ||
48b8d208 HH |
509 | static void pblk_line_meta_free(struct pblk_line_mgmt *l_mg, |
510 | struct pblk_line *line) | |
dffdd960 | 511 | { |
48b8d208 HH |
512 | struct pblk_w_err_gc *w_err_gc = line->w_err_gc; |
513 | ||
dffdd960 JG |
514 | kfree(line->blk_bitmap); |
515 | kfree(line->erase_bitmap); | |
32ef9412 | 516 | kfree(line->chks); |
48b8d208 HH |
517 | |
518 | pblk_mfree(w_err_gc->lba_list, l_mg->emeta_alloc_type); | |
519 | kfree(w_err_gc); | |
dffdd960 JG |
520 | } |
521 | ||
a4bd217b JG |
522 | static void pblk_lines_free(struct pblk *pblk) |
523 | { | |
524 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
525 | struct pblk_line *line; | |
526 | int i; | |
527 | ||
528 | spin_lock(&l_mg->free_lock); | |
529 | for (i = 0; i < l_mg->nr_lines; i++) { | |
530 | line = &pblk->lines[i]; | |
531 | ||
8e55c07b | 532 | pblk_line_free(line); |
48b8d208 | 533 | pblk_line_meta_free(l_mg, line); |
a4bd217b JG |
534 | } |
535 | spin_unlock(&l_mg->free_lock); | |
43d47127 JG |
536 | |
537 | pblk_line_mg_free(pblk); | |
538 | ||
539 | kfree(pblk->luns); | |
540 | kfree(pblk->lines); | |
a4bd217b JG |
541 | } |
542 | ||
e411b331 JG |
543 | static int pblk_bb_get_tbl(struct nvm_tgt_dev *dev, struct pblk_lun *rlun, |
544 | u8 *blks, int nr_blks) | |
a4bd217b | 545 | { |
a4bd217b | 546 | struct ppa_addr ppa; |
e411b331 | 547 | int ret; |
a4bd217b JG |
548 | |
549 | ppa.ppa = 0; | |
550 | ppa.g.ch = rlun->bppa.g.ch; | |
551 | ppa.g.lun = rlun->bppa.g.lun; | |
552 | ||
553 | ret = nvm_get_tgt_bb_tbl(dev, ppa, blks); | |
554 | if (ret) | |
e411b331 | 555 | return ret; |
a4bd217b JG |
556 | |
557 | nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks); | |
e411b331 JG |
558 | if (nr_blks < 0) |
559 | return -EIO; | |
a4bd217b | 560 | |
5136a4fd | 561 | return 0; |
a4bd217b JG |
562 | } |
563 | ||
32ef9412 | 564 | static void *pblk_bb_get_meta(struct pblk *pblk) |
a4bd217b | 565 | { |
dffdd960 JG |
566 | struct nvm_tgt_dev *dev = pblk->dev; |
567 | struct nvm_geo *geo = &dev->geo; | |
32ef9412 | 568 | u8 *meta; |
e411b331 JG |
569 | int i, nr_blks, blk_per_lun; |
570 | int ret; | |
a4bd217b | 571 | |
a40afad9 | 572 | blk_per_lun = geo->num_chk * geo->pln_mode; |
e411b331 | 573 | nr_blks = blk_per_lun * geo->all_luns; |
dffdd960 | 574 | |
32ef9412 JG |
575 | meta = kmalloc(nr_blks, GFP_KERNEL); |
576 | if (!meta) | |
e411b331 JG |
577 | return ERR_PTR(-ENOMEM); |
578 | ||
579 | for (i = 0; i < geo->all_luns; i++) { | |
580 | struct pblk_lun *rlun = &pblk->luns[i]; | |
32ef9412 | 581 | u8 *meta_pos = meta + i * blk_per_lun; |
e411b331 | 582 | |
32ef9412 | 583 | ret = pblk_bb_get_tbl(dev, rlun, meta_pos, blk_per_lun); |
e411b331 | 584 | if (ret) { |
32ef9412 | 585 | kfree(meta); |
e411b331 JG |
586 | return ERR_PTR(-EIO); |
587 | } | |
dffdd960 JG |
588 | } |
589 | ||
32ef9412 | 590 | return meta; |
dffdd960 JG |
591 | } |
592 | ||
32ef9412 | 593 | static void *pblk_chunk_get_meta(struct pblk *pblk) |
dffdd960 | 594 | { |
e411b331 JG |
595 | struct nvm_tgt_dev *dev = pblk->dev; |
596 | struct nvm_geo *geo = &dev->geo; | |
dffdd960 | 597 | |
32ef9412 JG |
598 | if (geo->version == NVM_OCSSD_SPEC_12) |
599 | return pblk_bb_get_meta(pblk); | |
600 | else | |
601 | return pblk_chunk_get_info(pblk); | |
a4bd217b JG |
602 | } |
603 | ||
43d47127 | 604 | static int pblk_luns_init(struct pblk *pblk) |
a4bd217b JG |
605 | { |
606 | struct nvm_tgt_dev *dev = pblk->dev; | |
607 | struct nvm_geo *geo = &dev->geo; | |
608 | struct pblk_lun *rlun; | |
e411b331 | 609 | int i; |
a4bd217b JG |
610 | |
611 | /* TODO: Implement unbalanced LUN support */ | |
a40afad9 | 612 | if (geo->num_lun < 0) { |
4e495a46 | 613 | pblk_err(pblk, "unbalanced LUN config.\n"); |
a4bd217b JG |
614 | return -EINVAL; |
615 | } | |
616 | ||
fae7fae4 MB |
617 | pblk->luns = kcalloc(geo->all_luns, sizeof(struct pblk_lun), |
618 | GFP_KERNEL); | |
a4bd217b JG |
619 | if (!pblk->luns) |
620 | return -ENOMEM; | |
621 | ||
fae7fae4 | 622 | for (i = 0; i < geo->all_luns; i++) { |
a4bd217b | 623 | /* Stripe across channels */ |
a40afad9 JG |
624 | int ch = i % geo->num_ch; |
625 | int lun_raw = i / geo->num_ch; | |
626 | int lunid = lun_raw + ch * geo->num_lun; | |
a4bd217b JG |
627 | |
628 | rlun = &pblk->luns[i]; | |
43d47127 | 629 | rlun->bppa = dev->luns[lunid]; |
a4bd217b JG |
630 | |
631 | sema_init(&rlun->wr_sem, 1); | |
a4bd217b JG |
632 | } |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
a4bd217b | 637 | /* See comment over struct line_emeta definition */ |
dd2a4343 | 638 | static unsigned int calc_emeta_len(struct pblk *pblk) |
a4bd217b | 639 | { |
dd2a4343 JG |
640 | struct pblk_line_meta *lm = &pblk->lm; |
641 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
642 | struct nvm_tgt_dev *dev = pblk->dev; | |
643 | struct nvm_geo *geo = &dev->geo; | |
644 | ||
645 | /* Round to sector size so that lba_list starts on its own sector */ | |
646 | lm->emeta_sec[1] = DIV_ROUND_UP( | |
76758390 | 647 | sizeof(struct line_emeta) + lm->blk_bitmap_len + |
e46f4e48 JG |
648 | sizeof(struct wa_counters), geo->csecs); |
649 | lm->emeta_len[1] = lm->emeta_sec[1] * geo->csecs; | |
dd2a4343 JG |
650 | |
651 | /* Round to sector size so that vsc_list starts on its own sector */ | |
652 | lm->dsec_per_line = lm->sec_per_line - lm->emeta_sec[0]; | |
653 | lm->emeta_sec[2] = DIV_ROUND_UP(lm->dsec_per_line * sizeof(u64), | |
e46f4e48 JG |
654 | geo->csecs); |
655 | lm->emeta_len[2] = lm->emeta_sec[2] * geo->csecs; | |
dd2a4343 JG |
656 | |
657 | lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32), | |
e46f4e48 JG |
658 | geo->csecs); |
659 | lm->emeta_len[3] = lm->emeta_sec[3] * geo->csecs; | |
dd2a4343 JG |
660 | |
661 | lm->vsc_list_len = l_mg->nr_lines * sizeof(u32); | |
662 | ||
663 | return (lm->emeta_len[1] + lm->emeta_len[2] + lm->emeta_len[3]); | |
a4bd217b JG |
664 | } |
665 | ||
666 | static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) | |
667 | { | |
668 | struct nvm_tgt_dev *dev = pblk->dev; | |
a7689938 JG |
669 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
670 | struct pblk_line_meta *lm = &pblk->lm; | |
a4bd217b JG |
671 | struct nvm_geo *geo = &dev->geo; |
672 | sector_t provisioned; | |
a7689938 | 673 | int sec_meta, blk_meta; |
a4bd217b | 674 | |
e5392739 JG |
675 | if (geo->op == NVM_TARGET_DEFAULT_OP) |
676 | pblk->op = PBLK_DEFAULT_OP; | |
677 | else | |
678 | pblk->op = geo->op; | |
a4bd217b JG |
679 | |
680 | provisioned = nr_free_blks; | |
a7689938 | 681 | provisioned *= (100 - pblk->op); |
a4bd217b JG |
682 | sector_div(provisioned, 100); |
683 | ||
a7689938 JG |
684 | pblk->op_blks = nr_free_blks - provisioned; |
685 | ||
a4bd217b JG |
686 | /* Internally pblk manages all free blocks, but all calculations based |
687 | * on user capacity consider only provisioned blocks | |
688 | */ | |
689 | pblk->rl.total_blocks = nr_free_blks; | |
e46f4e48 | 690 | pblk->rl.nr_secs = nr_free_blks * geo->clba; |
a7689938 JG |
691 | |
692 | /* Consider sectors used for metadata */ | |
693 | sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines; | |
e46f4e48 | 694 | blk_meta = DIV_ROUND_UP(sec_meta, geo->clba); |
a7689938 | 695 | |
e46f4e48 | 696 | pblk->capacity = (provisioned - blk_meta) * geo->clba; |
a7689938 | 697 | |
a4bd217b | 698 | atomic_set(&pblk->rl.free_blocks, nr_free_blks); |
a7689938 | 699 | atomic_set(&pblk->rl.free_user_blocks, nr_free_blks); |
a4bd217b JG |
700 | } |
701 | ||
32ef9412 JG |
702 | static int pblk_setup_line_meta_12(struct pblk *pblk, struct pblk_line *line, |
703 | void *chunk_meta) | |
704 | { | |
705 | struct nvm_tgt_dev *dev = pblk->dev; | |
706 | struct nvm_geo *geo = &dev->geo; | |
707 | struct pblk_line_meta *lm = &pblk->lm; | |
708 | int i, chk_per_lun, nr_bad_chks = 0; | |
709 | ||
710 | chk_per_lun = geo->num_chk * geo->pln_mode; | |
711 | ||
712 | for (i = 0; i < lm->blk_per_line; i++) { | |
713 | struct pblk_lun *rlun = &pblk->luns[i]; | |
714 | struct nvm_chk_meta *chunk; | |
715 | int pos = pblk_ppa_to_pos(geo, rlun->bppa); | |
716 | u8 *lun_bb_meta = chunk_meta + pos * chk_per_lun; | |
717 | ||
718 | chunk = &line->chks[pos]; | |
719 | ||
720 | /* | |
721 | * In 1.2 spec. chunk state is not persisted by the device. Thus | |
f6352103 HH |
722 | * some of the values are reset each time pblk is instantiated, |
723 | * so we have to assume that the block is closed. | |
32ef9412 JG |
724 | */ |
725 | if (lun_bb_meta[line->id] == NVM_BLK_T_FREE) | |
f6352103 | 726 | chunk->state = NVM_CHK_ST_CLOSED; |
32ef9412 JG |
727 | else |
728 | chunk->state = NVM_CHK_ST_OFFLINE; | |
729 | ||
730 | chunk->type = NVM_CHK_TP_W_SEQ; | |
731 | chunk->wi = 0; | |
732 | chunk->slba = -1; | |
733 | chunk->cnlb = geo->clba; | |
734 | chunk->wp = 0; | |
735 | ||
736 | if (!(chunk->state & NVM_CHK_ST_OFFLINE)) | |
737 | continue; | |
738 | ||
739 | set_bit(pos, line->blk_bitmap); | |
740 | nr_bad_chks++; | |
741 | } | |
742 | ||
743 | return nr_bad_chks; | |
744 | } | |
745 | ||
746 | static int pblk_setup_line_meta_20(struct pblk *pblk, struct pblk_line *line, | |
747 | struct nvm_chk_meta *meta) | |
748 | { | |
749 | struct nvm_tgt_dev *dev = pblk->dev; | |
750 | struct nvm_geo *geo = &dev->geo; | |
751 | struct pblk_line_meta *lm = &pblk->lm; | |
752 | int i, nr_bad_chks = 0; | |
753 | ||
754 | for (i = 0; i < lm->blk_per_line; i++) { | |
755 | struct pblk_lun *rlun = &pblk->luns[i]; | |
756 | struct nvm_chk_meta *chunk; | |
757 | struct nvm_chk_meta *chunk_meta; | |
758 | struct ppa_addr ppa; | |
759 | int pos; | |
760 | ||
761 | ppa = rlun->bppa; | |
762 | pos = pblk_ppa_to_pos(geo, ppa); | |
763 | chunk = &line->chks[pos]; | |
764 | ||
765 | ppa.m.chk = line->id; | |
766 | chunk_meta = pblk_chunk_get_off(pblk, meta, ppa); | |
767 | ||
768 | chunk->state = chunk_meta->state; | |
769 | chunk->type = chunk_meta->type; | |
770 | chunk->wi = chunk_meta->wi; | |
771 | chunk->slba = chunk_meta->slba; | |
772 | chunk->cnlb = chunk_meta->cnlb; | |
773 | chunk->wp = chunk_meta->wp; | |
774 | ||
32ef9412 JG |
775 | if (chunk->type & NVM_CHK_TP_SZ_SPEC) { |
776 | WARN_ONCE(1, "pblk: custom-sized chunks unsupported\n"); | |
777 | continue; | |
778 | } | |
779 | ||
6f9c9607 JG |
780 | if (!(chunk->state & NVM_CHK_ST_OFFLINE)) |
781 | continue; | |
782 | ||
32ef9412 JG |
783 | set_bit(pos, line->blk_bitmap); |
784 | nr_bad_chks++; | |
785 | } | |
786 | ||
787 | return nr_bad_chks; | |
788 | } | |
789 | ||
790 | static long pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line, | |
791 | void *chunk_meta, int line_id) | |
792 | { | |
793 | struct nvm_tgt_dev *dev = pblk->dev; | |
794 | struct nvm_geo *geo = &dev->geo; | |
795 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
796 | struct pblk_line_meta *lm = &pblk->lm; | |
797 | long nr_bad_chks, chk_in_line; | |
798 | ||
799 | line->pblk = pblk; | |
800 | line->id = line_id; | |
801 | line->type = PBLK_LINETYPE_FREE; | |
802 | line->state = PBLK_LINESTATE_NEW; | |
803 | line->gc_group = PBLK_LINEGC_NONE; | |
804 | line->vsc = &l_mg->vsc_list[line_id]; | |
805 | spin_lock_init(&line->lock); | |
806 | ||
807 | if (geo->version == NVM_OCSSD_SPEC_12) | |
808 | nr_bad_chks = pblk_setup_line_meta_12(pblk, line, chunk_meta); | |
809 | else | |
810 | nr_bad_chks = pblk_setup_line_meta_20(pblk, line, chunk_meta); | |
811 | ||
812 | chk_in_line = lm->blk_per_line - nr_bad_chks; | |
813 | if (nr_bad_chks < 0 || nr_bad_chks > lm->blk_per_line || | |
814 | chk_in_line < lm->min_blk_line) { | |
815 | line->state = PBLK_LINESTATE_BAD; | |
816 | list_add_tail(&line->list, &l_mg->bad_list); | |
817 | return 0; | |
818 | } | |
819 | ||
820 | atomic_set(&line->blk_in_line, chk_in_line); | |
821 | list_add_tail(&line->list, &l_mg->free_list); | |
822 | l_mg->nr_free_lines++; | |
823 | ||
824 | return chk_in_line; | |
825 | } | |
826 | ||
827 | static int pblk_alloc_line_meta(struct pblk *pblk, struct pblk_line *line) | |
43d47127 JG |
828 | { |
829 | struct pblk_line_meta *lm = &pblk->lm; | |
830 | ||
831 | line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); | |
832 | if (!line->blk_bitmap) | |
833 | return -ENOMEM; | |
834 | ||
835 | line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); | |
48b8d208 HH |
836 | if (!line->erase_bitmap) |
837 | goto free_blk_bitmap; | |
838 | ||
43d47127 | 839 | |
6da2ec56 KC |
840 | line->chks = kmalloc_array(lm->blk_per_line, |
841 | sizeof(struct nvm_chk_meta), GFP_KERNEL); | |
48b8d208 HH |
842 | if (!line->chks) |
843 | goto free_erase_bitmap; | |
844 | ||
845 | line->w_err_gc = kzalloc(sizeof(struct pblk_w_err_gc), GFP_KERNEL); | |
846 | if (!line->w_err_gc) | |
847 | goto free_chks; | |
43d47127 JG |
848 | |
849 | return 0; | |
48b8d208 HH |
850 | |
851 | free_chks: | |
852 | kfree(line->chks); | |
853 | free_erase_bitmap: | |
854 | kfree(line->erase_bitmap); | |
855 | free_blk_bitmap: | |
856 | kfree(line->blk_bitmap); | |
857 | return -ENOMEM; | |
43d47127 JG |
858 | } |
859 | ||
860 | static int pblk_line_mg_init(struct pblk *pblk) | |
dd2a4343 | 861 | { |
43d47127 JG |
862 | struct nvm_tgt_dev *dev = pblk->dev; |
863 | struct nvm_geo *geo = &dev->geo; | |
dd2a4343 JG |
864 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
865 | struct pblk_line_meta *lm = &pblk->lm; | |
43d47127 JG |
866 | int i, bb_distance; |
867 | ||
a40afad9 | 868 | l_mg->nr_lines = geo->num_chk; |
43d47127 JG |
869 | l_mg->log_line = l_mg->data_line = NULL; |
870 | l_mg->l_seq_nr = l_mg->d_seq_nr = 0; | |
871 | l_mg->nr_free_lines = 0; | |
872 | bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
873 | ||
874 | INIT_LIST_HEAD(&l_mg->free_list); | |
875 | INIT_LIST_HEAD(&l_mg->corrupt_list); | |
876 | INIT_LIST_HEAD(&l_mg->bad_list); | |
877 | INIT_LIST_HEAD(&l_mg->gc_full_list); | |
878 | INIT_LIST_HEAD(&l_mg->gc_high_list); | |
879 | INIT_LIST_HEAD(&l_mg->gc_mid_list); | |
880 | INIT_LIST_HEAD(&l_mg->gc_low_list); | |
881 | INIT_LIST_HEAD(&l_mg->gc_empty_list); | |
48b8d208 | 882 | INIT_LIST_HEAD(&l_mg->gc_werr_list); |
43d47127 JG |
883 | |
884 | INIT_LIST_HEAD(&l_mg->emeta_list); | |
885 | ||
48b8d208 HH |
886 | l_mg->gc_lists[0] = &l_mg->gc_werr_list; |
887 | l_mg->gc_lists[1] = &l_mg->gc_high_list; | |
888 | l_mg->gc_lists[2] = &l_mg->gc_mid_list; | |
889 | l_mg->gc_lists[3] = &l_mg->gc_low_list; | |
43d47127 JG |
890 | |
891 | spin_lock_init(&l_mg->free_lock); | |
892 | spin_lock_init(&l_mg->close_lock); | |
893 | spin_lock_init(&l_mg->gc_lock); | |
894 | ||
895 | l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL); | |
896 | if (!l_mg->vsc_list) | |
897 | goto fail; | |
898 | ||
899 | l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
900 | if (!l_mg->bb_template) | |
901 | goto fail_free_vsc_list; | |
902 | ||
903 | l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
904 | if (!l_mg->bb_aux) | |
905 | goto fail_free_bb_template; | |
dd2a4343 JG |
906 | |
907 | /* smeta is always small enough to fit on a kmalloc memory allocation, | |
908 | * emeta depends on the number of LUNs allocated to the pblk instance | |
909 | */ | |
dd2a4343 JG |
910 | for (i = 0; i < PBLK_DATA_LINES; i++) { |
911 | l_mg->sline_meta[i] = kmalloc(lm->smeta_len, GFP_KERNEL); | |
912 | if (!l_mg->sline_meta[i]) | |
913 | goto fail_free_smeta; | |
914 | } | |
915 | ||
916 | /* emeta allocates three different buffers for managing metadata with | |
917 | * in-memory and in-media layouts | |
918 | */ | |
919 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
920 | struct pblk_emeta *emeta; | |
921 | ||
922 | emeta = kmalloc(sizeof(struct pblk_emeta), GFP_KERNEL); | |
923 | if (!emeta) | |
924 | goto fail_free_emeta; | |
925 | ||
926 | if (lm->emeta_len[0] > KMALLOC_MAX_CACHE_SIZE) { | |
927 | l_mg->emeta_alloc_type = PBLK_VMALLOC_META; | |
928 | ||
929 | emeta->buf = vmalloc(lm->emeta_len[0]); | |
930 | if (!emeta->buf) { | |
931 | kfree(emeta); | |
932 | goto fail_free_emeta; | |
933 | } | |
934 | ||
935 | emeta->nr_entries = lm->emeta_sec[0]; | |
936 | l_mg->eline_meta[i] = emeta; | |
937 | } else { | |
938 | l_mg->emeta_alloc_type = PBLK_KMALLOC_META; | |
939 | ||
940 | emeta->buf = kmalloc(lm->emeta_len[0], GFP_KERNEL); | |
941 | if (!emeta->buf) { | |
942 | kfree(emeta); | |
943 | goto fail_free_emeta; | |
944 | } | |
945 | ||
946 | emeta->nr_entries = lm->emeta_sec[0]; | |
947 | l_mg->eline_meta[i] = emeta; | |
948 | } | |
949 | } | |
950 | ||
dd2a4343 JG |
951 | for (i = 0; i < l_mg->nr_lines; i++) |
952 | l_mg->vsc_list[i] = cpu_to_le32(EMPTY_ENTRY); | |
953 | ||
43d47127 JG |
954 | bb_distance = (geo->all_luns) * geo->ws_opt; |
955 | for (i = 0; i < lm->sec_per_line; i += bb_distance) | |
956 | bitmap_set(l_mg->bb_template, i, geo->ws_opt); | |
957 | ||
dd2a4343 JG |
958 | return 0; |
959 | ||
960 | fail_free_emeta: | |
961 | while (--i >= 0) { | |
c9d84b35 RP |
962 | if (l_mg->emeta_alloc_type == PBLK_VMALLOC_META) |
963 | vfree(l_mg->eline_meta[i]->buf); | |
964 | else | |
965 | kfree(l_mg->eline_meta[i]->buf); | |
f680f19a | 966 | kfree(l_mg->eline_meta[i]); |
dd2a4343 | 967 | } |
dd2a4343 JG |
968 | fail_free_smeta: |
969 | for (i = 0; i < PBLK_DATA_LINES; i++) | |
f680f19a | 970 | kfree(l_mg->sline_meta[i]); |
43d47127 JG |
971 | kfree(l_mg->bb_aux); |
972 | fail_free_bb_template: | |
973 | kfree(l_mg->bb_template); | |
974 | fail_free_vsc_list: | |
975 | kfree(l_mg->vsc_list); | |
976 | fail: | |
dd2a4343 JG |
977 | return -ENOMEM; |
978 | } | |
979 | ||
43d47127 | 980 | static int pblk_line_meta_init(struct pblk *pblk) |
a4bd217b JG |
981 | { |
982 | struct nvm_tgt_dev *dev = pblk->dev; | |
983 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b | 984 | struct pblk_line_meta *lm = &pblk->lm; |
a4bd217b | 985 | unsigned int smeta_len, emeta_len; |
43d47127 | 986 | int i; |
a4bd217b | 987 | |
e46f4e48 | 988 | lm->sec_per_line = geo->clba * geo->all_luns; |
fae7fae4 MB |
989 | lm->blk_per_line = geo->all_luns; |
990 | lm->blk_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); | |
a4bd217b | 991 | lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long); |
fae7fae4 | 992 | lm->lun_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); |
27b97872 RP |
993 | lm->mid_thrs = lm->sec_per_line / 2; |
994 | lm->high_thrs = lm->sec_per_line / 4; | |
fae7fae4 | 995 | lm->meta_distance = (geo->all_luns / 2) * pblk->min_write_pgs; |
a4bd217b JG |
996 | |
997 | /* Calculate necessary pages for smeta. See comment over struct | |
998 | * line_smeta definition | |
999 | */ | |
a4bd217b JG |
1000 | i = 1; |
1001 | add_smeta_page: | |
e46f4e48 JG |
1002 | lm->smeta_sec = i * geo->ws_opt; |
1003 | lm->smeta_len = lm->smeta_sec * geo->csecs; | |
a4bd217b | 1004 | |
dd2a4343 | 1005 | smeta_len = sizeof(struct line_smeta) + lm->lun_bitmap_len; |
a4bd217b JG |
1006 | if (smeta_len > lm->smeta_len) { |
1007 | i++; | |
1008 | goto add_smeta_page; | |
1009 | } | |
1010 | ||
1011 | /* Calculate necessary pages for emeta. See comment over struct | |
1012 | * line_emeta definition | |
1013 | */ | |
1014 | i = 1; | |
1015 | add_emeta_page: | |
e46f4e48 JG |
1016 | lm->emeta_sec[0] = i * geo->ws_opt; |
1017 | lm->emeta_len[0] = lm->emeta_sec[0] * geo->csecs; | |
a4bd217b | 1018 | |
dd2a4343 JG |
1019 | emeta_len = calc_emeta_len(pblk); |
1020 | if (emeta_len > lm->emeta_len[0]) { | |
a4bd217b JG |
1021 | i++; |
1022 | goto add_emeta_page; | |
1023 | } | |
a4bd217b | 1024 | |
fae7fae4 | 1025 | lm->emeta_bb = geo->all_luns > i ? geo->all_luns - i : 0; |
21d22871 JG |
1026 | |
1027 | lm->min_blk_line = 1; | |
fae7fae4 | 1028 | if (geo->all_luns > 1) |
21d22871 | 1029 | lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec + |
e46f4e48 | 1030 | lm->emeta_sec[0], geo->clba); |
21d22871 | 1031 | |
b5e063a2 | 1032 | if (lm->min_blk_line > lm->blk_per_line) { |
4e495a46 | 1033 | pblk_err(pblk, "config. not supported. Min. LUN in line:%d\n", |
b5e063a2 | 1034 | lm->blk_per_line); |
e411b331 | 1035 | return -EINVAL; |
b5e063a2 | 1036 | } |
a4bd217b | 1037 | |
43d47127 JG |
1038 | return 0; |
1039 | } | |
1040 | ||
1041 | static int pblk_lines_init(struct pblk *pblk) | |
1042 | { | |
1043 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
43d47127 | 1044 | struct pblk_line *line; |
32ef9412 JG |
1045 | void *chunk_meta; |
1046 | long nr_free_chks = 0; | |
43d47127 JG |
1047 | int i, ret; |
1048 | ||
1049 | ret = pblk_line_meta_init(pblk); | |
dd2a4343 | 1050 | if (ret) |
e411b331 | 1051 | return ret; |
a4bd217b | 1052 | |
43d47127 JG |
1053 | ret = pblk_line_mg_init(pblk); |
1054 | if (ret) | |
1055 | return ret; | |
1056 | ||
1057 | ret = pblk_luns_init(pblk); | |
1058 | if (ret) | |
a4bd217b JG |
1059 | goto fail_free_meta; |
1060 | ||
32ef9412 JG |
1061 | chunk_meta = pblk_chunk_get_meta(pblk); |
1062 | if (IS_ERR(chunk_meta)) { | |
1063 | ret = PTR_ERR(chunk_meta); | |
43d47127 | 1064 | goto fail_free_luns; |
1c6286f2 | 1065 | } |
a4bd217b | 1066 | |
a4bd217b JG |
1067 | pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line), |
1068 | GFP_KERNEL); | |
1c6286f2 DC |
1069 | if (!pblk->lines) { |
1070 | ret = -ENOMEM; | |
32ef9412 | 1071 | goto fail_free_chunk_meta; |
e411b331 JG |
1072 | } |
1073 | ||
a4bd217b JG |
1074 | for (i = 0; i < l_mg->nr_lines; i++) { |
1075 | line = &pblk->lines[i]; | |
1076 | ||
32ef9412 | 1077 | ret = pblk_alloc_line_meta(pblk, line); |
dffdd960 | 1078 | if (ret) |
43d47127 | 1079 | goto fail_free_lines; |
dffdd960 | 1080 | |
32ef9412 | 1081 | nr_free_chks += pblk_setup_line_meta(pblk, line, chunk_meta, i); |
a4bd217b JG |
1082 | } |
1083 | ||
2deeefc0 | 1084 | if (!nr_free_chks) { |
4e495a46 | 1085 | pblk_err(pblk, "too many bad blocks prevent for sane instance\n"); |
2deeefc0 JG |
1086 | return -EINTR; |
1087 | } | |
1088 | ||
32ef9412 | 1089 | pblk_set_provision(pblk, nr_free_chks); |
a4bd217b | 1090 | |
32ef9412 | 1091 | kfree(chunk_meta); |
a4bd217b | 1092 | return 0; |
e411b331 | 1093 | |
43d47127 | 1094 | fail_free_lines: |
dffdd960 | 1095 | while (--i >= 0) |
48b8d208 | 1096 | pblk_line_meta_free(l_mg, &pblk->lines[i]); |
43d47127 | 1097 | kfree(pblk->lines); |
32ef9412 JG |
1098 | fail_free_chunk_meta: |
1099 | kfree(chunk_meta); | |
43d47127 JG |
1100 | fail_free_luns: |
1101 | kfree(pblk->luns); | |
a4bd217b | 1102 | fail_free_meta: |
e411b331 | 1103 | pblk_line_mg_free(pblk); |
a4bd217b JG |
1104 | |
1105 | return ret; | |
1106 | } | |
1107 | ||
1108 | static int pblk_writer_init(struct pblk *pblk) | |
1109 | { | |
a4bd217b JG |
1110 | pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t"); |
1111 | if (IS_ERR(pblk->writer_ts)) { | |
cc4f5ba1 JG |
1112 | int err = PTR_ERR(pblk->writer_ts); |
1113 | ||
1114 | if (err != -EINTR) | |
4e495a46 | 1115 | pblk_err(pblk, "could not allocate writer kthread (%d)\n", |
cc4f5ba1 JG |
1116 | err); |
1117 | return err; | |
a4bd217b JG |
1118 | } |
1119 | ||
cc4f5ba1 JG |
1120 | timer_setup(&pblk->wtimer, pblk_write_timer_fn, 0); |
1121 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); | |
1122 | ||
a4bd217b JG |
1123 | return 0; |
1124 | } | |
1125 | ||
1126 | static void pblk_writer_stop(struct pblk *pblk) | |
1127 | { | |
ee8d5c1a JG |
1128 | /* The pipeline must be stopped and the write buffer emptied before the |
1129 | * write thread is stopped | |
1130 | */ | |
1131 | WARN(pblk_rb_read_count(&pblk->rwb), | |
1132 | "Stopping not fully persisted write buffer\n"); | |
1133 | ||
1134 | WARN(pblk_rb_sync_count(&pblk->rwb), | |
1135 | "Stopping not fully synced write buffer\n"); | |
1136 | ||
7be970b2 | 1137 | del_timer_sync(&pblk->wtimer); |
a4bd217b JG |
1138 | if (pblk->writer_ts) |
1139 | kthread_stop(pblk->writer_ts); | |
a4bd217b JG |
1140 | } |
1141 | ||
1142 | static void pblk_free(struct pblk *pblk) | |
1143 | { | |
a4bd217b | 1144 | pblk_lines_free(pblk); |
a4bd217b | 1145 | pblk_l2p_free(pblk); |
43d47127 JG |
1146 | pblk_rwb_free(pblk); |
1147 | pblk_core_free(pblk); | |
a4bd217b JG |
1148 | |
1149 | kfree(pblk); | |
1150 | } | |
1151 | ||
a7c9e910 | 1152 | static void pblk_tear_down(struct pblk *pblk, bool graceful) |
a4bd217b | 1153 | { |
a7c9e910 JG |
1154 | if (graceful) |
1155 | __pblk_pipeline_flush(pblk); | |
1156 | __pblk_pipeline_stop(pblk); | |
a4bd217b JG |
1157 | pblk_writer_stop(pblk); |
1158 | pblk_rb_sync_l2p(&pblk->rwb); | |
a4bd217b JG |
1159 | pblk_rl_free(&pblk->rl); |
1160 | ||
4e495a46 | 1161 | pblk_debug(pblk, "consistent tear down (graceful:%d)\n", graceful); |
a4bd217b JG |
1162 | } |
1163 | ||
a7c9e910 | 1164 | static void pblk_exit(void *private, bool graceful) |
a4bd217b JG |
1165 | { |
1166 | struct pblk *pblk = private; | |
1167 | ||
1168 | down_write(&pblk_lock); | |
a7c9e910 JG |
1169 | pblk_gc_exit(pblk, graceful); |
1170 | pblk_tear_down(pblk, graceful); | |
c5586192 | 1171 | |
880eda54 | 1172 | #ifdef CONFIG_NVM_PBLK_DEBUG |
4e495a46 | 1173 | pblk_info(pblk, "exit: L2P CRC: %x\n", pblk_l2p_crc(pblk)); |
c5586192 HH |
1174 | #endif |
1175 | ||
a4bd217b JG |
1176 | pblk_free(pblk); |
1177 | up_write(&pblk_lock); | |
1178 | } | |
1179 | ||
1180 | static sector_t pblk_capacity(void *private) | |
1181 | { | |
1182 | struct pblk *pblk = private; | |
1183 | ||
1184 | return pblk->capacity * NR_PHY_IN_LOG; | |
1185 | } | |
1186 | ||
1187 | static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, | |
1188 | int flags) | |
1189 | { | |
1190 | struct nvm_geo *geo = &dev->geo; | |
1191 | struct request_queue *bqueue = dev->q; | |
1192 | struct request_queue *tqueue = tdisk->queue; | |
1193 | struct pblk *pblk; | |
1194 | int ret; | |
1195 | ||
4e495a46 MB |
1196 | pblk = kzalloc(sizeof(struct pblk), GFP_KERNEL); |
1197 | if (!pblk) | |
1198 | return ERR_PTR(-ENOMEM); | |
1199 | ||
1200 | pblk->dev = dev; | |
1201 | pblk->disk = tdisk; | |
1202 | pblk->state = PBLK_STATE_RUNNING; | |
1203 | pblk->gc.gc_enabled = 0; | |
1204 | ||
3b2a3ad1 JG |
1205 | if (!(geo->version == NVM_OCSSD_SPEC_12 || |
1206 | geo->version == NVM_OCSSD_SPEC_20)) { | |
4e495a46 | 1207 | pblk_err(pblk, "OCSSD version not supported (%u)\n", |
7ad5039e | 1208 | geo->version); |
4e495a46 | 1209 | kfree(pblk); |
7ad5039e JG |
1210 | return ERR_PTR(-EINVAL); |
1211 | } | |
1212 | ||
1213 | if (geo->version == NVM_OCSSD_SPEC_12 && geo->dom & NVM_RSP_L2P) { | |
4e495a46 | 1214 | pblk_err(pblk, "host-side L2P table not supported. (%x)\n", |
7ad5039e | 1215 | geo->dom); |
4e495a46 | 1216 | kfree(pblk); |
a4bd217b JG |
1217 | return ERR_PTR(-EINVAL); |
1218 | } | |
1219 | ||
6a3abf5b | 1220 | spin_lock_init(&pblk->resubmit_lock); |
a4bd217b JG |
1221 | spin_lock_init(&pblk->trans_lock); |
1222 | spin_lock_init(&pblk->lock); | |
1223 | ||
880eda54 | 1224 | #ifdef CONFIG_NVM_PBLK_DEBUG |
a4bd217b JG |
1225 | atomic_long_set(&pblk->inflight_writes, 0); |
1226 | atomic_long_set(&pblk->padded_writes, 0); | |
1227 | atomic_long_set(&pblk->padded_wb, 0); | |
a4bd217b JG |
1228 | atomic_long_set(&pblk->req_writes, 0); |
1229 | atomic_long_set(&pblk->sub_writes, 0); | |
1230 | atomic_long_set(&pblk->sync_writes, 0); | |
a4bd217b | 1231 | atomic_long_set(&pblk->inflight_reads, 0); |
db7ada33 | 1232 | atomic_long_set(&pblk->cache_reads, 0); |
a4bd217b JG |
1233 | atomic_long_set(&pblk->sync_reads, 0); |
1234 | atomic_long_set(&pblk->recov_writes, 0); | |
1235 | atomic_long_set(&pblk->recov_writes, 0); | |
1236 | atomic_long_set(&pblk->recov_gc_writes, 0); | |
a1121176 | 1237 | atomic_long_set(&pblk->recov_gc_reads, 0); |
a4bd217b JG |
1238 | #endif |
1239 | ||
1240 | atomic_long_set(&pblk->read_failed, 0); | |
1241 | atomic_long_set(&pblk->read_empty, 0); | |
1242 | atomic_long_set(&pblk->read_high_ecc, 0); | |
1243 | atomic_long_set(&pblk->read_failed_gc, 0); | |
1244 | atomic_long_set(&pblk->write_failed, 0); | |
1245 | atomic_long_set(&pblk->erase_failed, 0); | |
1246 | ||
43d47127 | 1247 | ret = pblk_core_init(pblk); |
a4bd217b | 1248 | if (ret) { |
4e495a46 | 1249 | pblk_err(pblk, "could not initialize core\n"); |
a4bd217b JG |
1250 | goto fail; |
1251 | } | |
1252 | ||
1253 | ret = pblk_lines_init(pblk); | |
1254 | if (ret) { | |
4e495a46 | 1255 | pblk_err(pblk, "could not initialize lines\n"); |
43d47127 | 1256 | goto fail_free_core; |
5d149bfa HH |
1257 | } |
1258 | ||
43d47127 | 1259 | ret = pblk_rwb_init(pblk); |
a4bd217b | 1260 | if (ret) { |
4e495a46 | 1261 | pblk_err(pblk, "could not initialize write buffer\n"); |
43d47127 | 1262 | goto fail_free_lines; |
a4bd217b JG |
1263 | } |
1264 | ||
43d47127 | 1265 | ret = pblk_l2p_init(pblk, flags & NVM_TARGET_FACTORY); |
a4bd217b | 1266 | if (ret) { |
4e495a46 | 1267 | pblk_err(pblk, "could not initialize maps\n"); |
43d47127 | 1268 | goto fail_free_rwb; |
a4bd217b JG |
1269 | } |
1270 | ||
1271 | ret = pblk_writer_init(pblk); | |
1272 | if (ret) { | |
cc4f5ba1 | 1273 | if (ret != -EINTR) |
4e495a46 | 1274 | pblk_err(pblk, "could not initialize write thread\n"); |
43d47127 | 1275 | goto fail_free_l2p; |
a4bd217b JG |
1276 | } |
1277 | ||
1278 | ret = pblk_gc_init(pblk); | |
1279 | if (ret) { | |
4e495a46 | 1280 | pblk_err(pblk, "could not initialize gc\n"); |
a4bd217b JG |
1281 | goto fail_stop_writer; |
1282 | } | |
1283 | ||
1284 | /* inherit the size from the underlying device */ | |
1285 | blk_queue_logical_block_size(tqueue, queue_physical_block_size(bqueue)); | |
1286 | blk_queue_max_hw_sectors(tqueue, queue_max_hw_sectors(bqueue)); | |
1287 | ||
1288 | blk_queue_write_cache(tqueue, true, false); | |
1289 | ||
e46f4e48 | 1290 | tqueue->limits.discard_granularity = geo->clba * geo->csecs; |
a4bd217b JG |
1291 | tqueue->limits.discard_alignment = 0; |
1292 | blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); | |
8b904b5b | 1293 | blk_queue_flag_set(QUEUE_FLAG_DISCARD, tqueue); |
a4bd217b | 1294 | |
4e495a46 | 1295 | pblk_info(pblk, "luns:%u, lines:%d, secs:%llu, buf entries:%u\n", |
fae7fae4 | 1296 | geo->all_luns, pblk->l_mg.nr_lines, |
a4bd217b JG |
1297 | (unsigned long long)pblk->rl.nr_secs, |
1298 | pblk->rwb.nr_entries); | |
1299 | ||
1300 | wake_up_process(pblk->writer_ts); | |
03661b5f HH |
1301 | |
1302 | /* Check if we need to start GC */ | |
1303 | pblk_gc_should_kick(pblk); | |
1304 | ||
a4bd217b JG |
1305 | return pblk; |
1306 | ||
1307 | fail_stop_writer: | |
1308 | pblk_writer_stop(pblk); | |
a4bd217b JG |
1309 | fail_free_l2p: |
1310 | pblk_l2p_free(pblk); | |
43d47127 JG |
1311 | fail_free_rwb: |
1312 | pblk_rwb_free(pblk); | |
1313 | fail_free_lines: | |
1314 | pblk_lines_free(pblk); | |
a4bd217b JG |
1315 | fail_free_core: |
1316 | pblk_core_free(pblk); | |
a4bd217b JG |
1317 | fail: |
1318 | kfree(pblk); | |
1319 | return ERR_PTR(ret); | |
1320 | } | |
1321 | ||
1322 | /* physical block device target */ | |
1323 | static struct nvm_tgt_type tt_pblk = { | |
1324 | .name = "pblk", | |
1325 | .version = {1, 0, 0}, | |
1326 | ||
1327 | .make_rq = pblk_make_rq, | |
1328 | .capacity = pblk_capacity, | |
1329 | ||
1330 | .init = pblk_init, | |
1331 | .exit = pblk_exit, | |
1332 | ||
1333 | .sysfs_init = pblk_sysfs_init, | |
1334 | .sysfs_exit = pblk_sysfs_exit, | |
90014829 | 1335 | .owner = THIS_MODULE, |
a4bd217b JG |
1336 | }; |
1337 | ||
1338 | static int __init pblk_module_init(void) | |
1339 | { | |
b25d5237 N |
1340 | int ret; |
1341 | ||
b906bbb6 KO |
1342 | ret = bioset_init(&pblk_bio_set, BIO_POOL_SIZE, 0, 0); |
1343 | if (ret) | |
1344 | return ret; | |
b25d5237 N |
1345 | ret = nvm_register_tgt_type(&tt_pblk); |
1346 | if (ret) | |
b906bbb6 | 1347 | bioset_exit(&pblk_bio_set); |
b25d5237 | 1348 | return ret; |
a4bd217b JG |
1349 | } |
1350 | ||
1351 | static void pblk_module_exit(void) | |
1352 | { | |
b906bbb6 | 1353 | bioset_exit(&pblk_bio_set); |
a4bd217b JG |
1354 | nvm_unregister_tgt_type(&tt_pblk); |
1355 | } | |
1356 | ||
1357 | module_init(pblk_module_init); | |
1358 | module_exit(pblk_module_exit); | |
1359 | MODULE_AUTHOR("Javier Gonzalez <javier@cnexlabs.com>"); | |
1360 | MODULE_AUTHOR("Matias Bjorling <matias@cnexlabs.com>"); | |
1361 | MODULE_LICENSE("GPL v2"); | |
1362 | MODULE_DESCRIPTION("Physical Block-Device for Open-Channel SSDs"); |