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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 | ||
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); |
b25d5237 | 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 | ||
83 | if (pblk->ppaf_bitsize < 32) | |
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 */ | |
196 | power_len = get_count_order(geo->nr_chnls); | |
197 | if (1 << power_len != geo->nr_chnls) { | |
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 | |
fae7fae4 MB |
203 | power_len = get_count_order(geo->nr_luns); |
204 | if (1 << power_len != geo->nr_luns) { | |
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; | |
213 | dst->sect_len = src->sect_len; | |
214 | ||
215 | dst->sect_offset = 0; | |
216 | dst->pln_offset = dst->sect_len; | |
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 | ||
222 | dst->sec_mask = ((1ULL << dst->sect_len) - 1) << dst->sect_offset; | |
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 | ||
232 | static int pblk_set_ppaf(struct pblk *pblk) | |
233 | { | |
234 | struct nvm_tgt_dev *dev = pblk->dev; | |
235 | struct nvm_geo *geo = &dev->geo; | |
236 | int mod; | |
237 | ||
238 | div_u64_rem(geo->clba, pblk->min_write_pgs, &mod); | |
239 | if (mod) { | |
240 | pr_err("pblk: bad configuration of sectors/pages\n"); | |
241 | return -EINVAL; | |
242 | } | |
243 | ||
244 | pblk->ppaf_bitsize = pblk_set_addrf_12(geo, (void *)&pblk->ppaf); | |
a4bd217b JG |
245 | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static int pblk_init_global_caches(struct pblk *pblk) | |
250 | { | |
a4bd217b | 251 | down_write(&pblk_lock); |
b84ae4a8 | 252 | pblk_ws_cache = kmem_cache_create("pblk_blk_ws", |
a4bd217b | 253 | sizeof(struct pblk_line_ws), 0, 0, NULL); |
b84ae4a8 | 254 | if (!pblk_ws_cache) { |
a4bd217b JG |
255 | up_write(&pblk_lock); |
256 | return -ENOMEM; | |
257 | } | |
258 | ||
259 | pblk_rec_cache = kmem_cache_create("pblk_rec", | |
260 | sizeof(struct pblk_rec_ctx), 0, 0, NULL); | |
261 | if (!pblk_rec_cache) { | |
b84ae4a8 | 262 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
263 | up_write(&pblk_lock); |
264 | return -ENOMEM; | |
265 | } | |
266 | ||
084ec9ba | 267 | pblk_g_rq_cache = kmem_cache_create("pblk_g_rq", pblk_g_rq_size, |
a4bd217b | 268 | 0, 0, NULL); |
084ec9ba | 269 | if (!pblk_g_rq_cache) { |
b84ae4a8 | 270 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
271 | kmem_cache_destroy(pblk_rec_cache); |
272 | up_write(&pblk_lock); | |
273 | return -ENOMEM; | |
274 | } | |
275 | ||
276 | pblk_w_rq_cache = kmem_cache_create("pblk_w_rq", pblk_w_rq_size, | |
277 | 0, 0, NULL); | |
278 | if (!pblk_w_rq_cache) { | |
b84ae4a8 | 279 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b | 280 | kmem_cache_destroy(pblk_rec_cache); |
084ec9ba | 281 | kmem_cache_destroy(pblk_g_rq_cache); |
a4bd217b JG |
282 | up_write(&pblk_lock); |
283 | return -ENOMEM; | |
284 | } | |
a4bd217b JG |
285 | up_write(&pblk_lock); |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
22a4e061 RP |
290 | static void pblk_free_global_caches(struct pblk *pblk) |
291 | { | |
292 | kmem_cache_destroy(pblk_ws_cache); | |
293 | kmem_cache_destroy(pblk_rec_cache); | |
294 | kmem_cache_destroy(pblk_g_rq_cache); | |
295 | kmem_cache_destroy(pblk_w_rq_cache); | |
296 | } | |
297 | ||
a4bd217b JG |
298 | static int pblk_core_init(struct pblk *pblk) |
299 | { | |
300 | struct nvm_tgt_dev *dev = pblk->dev; | |
301 | struct nvm_geo *geo = &dev->geo; | |
43d47127 JG |
302 | int max_write_ppas; |
303 | ||
304 | atomic64_set(&pblk->user_wa, 0); | |
305 | atomic64_set(&pblk->pad_wa, 0); | |
306 | atomic64_set(&pblk->gc_wa, 0); | |
307 | pblk->user_rst_wa = 0; | |
308 | pblk->pad_rst_wa = 0; | |
309 | pblk->gc_rst_wa = 0; | |
310 | ||
311 | atomic64_set(&pblk->nr_flush, 0); | |
312 | pblk->nr_flush_rst = 0; | |
a4bd217b | 313 | |
e46f4e48 | 314 | pblk->pgs_in_buffer = geo->mw_cunits * geo->all_luns; |
a4bd217b | 315 | |
e46f4e48 | 316 | pblk->min_write_pgs = geo->ws_opt * (geo->csecs / PAGE_SIZE); |
43d47127 JG |
317 | max_write_ppas = pblk->min_write_pgs * geo->all_luns; |
318 | pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA); | |
319 | pblk_set_sec_per_write(pblk, pblk->min_write_pgs); | |
320 | ||
321 | if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) { | |
322 | pr_err("pblk: vector list too big(%u > %u)\n", | |
323 | pblk->max_write_pgs, PBLK_MAX_REQ_ADDRS); | |
324 | return -EINVAL; | |
325 | } | |
326 | ||
327 | pblk->pad_dist = kzalloc((pblk->min_write_pgs - 1) * sizeof(atomic64_t), | |
328 | GFP_KERNEL); | |
329 | if (!pblk->pad_dist) | |
a4bd217b JG |
330 | return -ENOMEM; |
331 | ||
43d47127 JG |
332 | if (pblk_init_global_caches(pblk)) |
333 | goto fail_free_pad_dist; | |
334 | ||
b84ae4a8 | 335 | /* Internal bios can be at most the sectors signaled by the device. */ |
89a09c56 | 336 | pblk->page_bio_pool = mempool_create_page_pool(NVM_MAX_VLBA, 0); |
bd432417 | 337 | if (!pblk->page_bio_pool) |
22a4e061 | 338 | goto free_global_caches; |
a4bd217b | 339 | |
b84ae4a8 JG |
340 | pblk->gen_ws_pool = mempool_create_slab_pool(PBLK_GEN_WS_POOL_SIZE, |
341 | pblk_ws_cache); | |
342 | if (!pblk->gen_ws_pool) | |
bd432417 | 343 | goto free_page_bio_pool; |
a4bd217b | 344 | |
fae7fae4 MB |
345 | pblk->rec_pool = mempool_create_slab_pool(geo->all_luns, |
346 | pblk_rec_cache); | |
a4bd217b | 347 | if (!pblk->rec_pool) |
b84ae4a8 | 348 | goto free_gen_ws_pool; |
a4bd217b | 349 | |
fae7fae4 | 350 | pblk->r_rq_pool = mempool_create_slab_pool(geo->all_luns, |
ef576494 | 351 | pblk_g_rq_cache); |
0d880398 | 352 | if (!pblk->r_rq_pool) |
a4bd217b JG |
353 | goto free_rec_pool; |
354 | ||
fae7fae4 | 355 | pblk->e_rq_pool = mempool_create_slab_pool(geo->all_luns, |
0d880398 JG |
356 | pblk_g_rq_cache); |
357 | if (!pblk->e_rq_pool) | |
358 | goto free_r_rq_pool; | |
359 | ||
fae7fae4 | 360 | pblk->w_rq_pool = mempool_create_slab_pool(geo->all_luns, |
ef576494 | 361 | pblk_w_rq_cache); |
a4bd217b | 362 | if (!pblk->w_rq_pool) |
0d880398 | 363 | goto free_e_rq_pool; |
a4bd217b | 364 | |
ef576494 JG |
365 | pblk->close_wq = alloc_workqueue("pblk-close-wq", |
366 | WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_NR_CLOSE_JOBS); | |
367 | if (!pblk->close_wq) | |
e72ec1d3 | 368 | goto free_w_rq_pool; |
a4bd217b | 369 | |
ef576494 JG |
370 | pblk->bb_wq = alloc_workqueue("pblk-bb-wq", |
371 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
372 | if (!pblk->bb_wq) | |
373 | goto free_close_wq; | |
374 | ||
7bd4d370 JG |
375 | pblk->r_end_wq = alloc_workqueue("pblk-read-end-wq", |
376 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
377 | if (!pblk->r_end_wq) | |
ef576494 | 378 | goto free_bb_wq; |
a4bd217b | 379 | |
7bd4d370 JG |
380 | if (pblk_set_ppaf(pblk)) |
381 | goto free_r_end_wq; | |
382 | ||
a4bd217b | 383 | INIT_LIST_HEAD(&pblk->compl_list); |
43d47127 | 384 | |
a4bd217b JG |
385 | return 0; |
386 | ||
7bd4d370 JG |
387 | free_r_end_wq: |
388 | destroy_workqueue(pblk->r_end_wq); | |
ef576494 JG |
389 | free_bb_wq: |
390 | destroy_workqueue(pblk->bb_wq); | |
391 | free_close_wq: | |
392 | destroy_workqueue(pblk->close_wq); | |
a4bd217b JG |
393 | free_w_rq_pool: |
394 | mempool_destroy(pblk->w_rq_pool); | |
0d880398 JG |
395 | free_e_rq_pool: |
396 | mempool_destroy(pblk->e_rq_pool); | |
397 | free_r_rq_pool: | |
398 | mempool_destroy(pblk->r_rq_pool); | |
a4bd217b JG |
399 | free_rec_pool: |
400 | mempool_destroy(pblk->rec_pool); | |
b84ae4a8 JG |
401 | free_gen_ws_pool: |
402 | mempool_destroy(pblk->gen_ws_pool); | |
bd432417 JG |
403 | free_page_bio_pool: |
404 | mempool_destroy(pblk->page_bio_pool); | |
22a4e061 RP |
405 | free_global_caches: |
406 | pblk_free_global_caches(pblk); | |
43d47127 JG |
407 | fail_free_pad_dist: |
408 | kfree(pblk->pad_dist); | |
a4bd217b JG |
409 | return -ENOMEM; |
410 | } | |
411 | ||
412 | static void pblk_core_free(struct pblk *pblk) | |
413 | { | |
ef576494 JG |
414 | if (pblk->close_wq) |
415 | destroy_workqueue(pblk->close_wq); | |
416 | ||
7bd4d370 JG |
417 | if (pblk->r_end_wq) |
418 | destroy_workqueue(pblk->r_end_wq); | |
419 | ||
ef576494 JG |
420 | if (pblk->bb_wq) |
421 | destroy_workqueue(pblk->bb_wq); | |
a4bd217b | 422 | |
bd432417 | 423 | mempool_destroy(pblk->page_bio_pool); |
b84ae4a8 | 424 | mempool_destroy(pblk->gen_ws_pool); |
a4bd217b | 425 | mempool_destroy(pblk->rec_pool); |
0d880398 JG |
426 | mempool_destroy(pblk->r_rq_pool); |
427 | mempool_destroy(pblk->e_rq_pool); | |
a4bd217b | 428 | mempool_destroy(pblk->w_rq_pool); |
a4bd217b | 429 | |
22a4e061 | 430 | pblk_free_global_caches(pblk); |
43d47127 | 431 | kfree(pblk->pad_dist); |
a4bd217b JG |
432 | } |
433 | ||
e411b331 JG |
434 | static void pblk_line_mg_free(struct pblk *pblk) |
435 | { | |
436 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
437 | int i; | |
438 | ||
439 | kfree(l_mg->bb_template); | |
440 | kfree(l_mg->bb_aux); | |
441 | kfree(l_mg->vsc_list); | |
442 | ||
443 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
444 | kfree(l_mg->sline_meta[i]); | |
445 | pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type); | |
446 | kfree(l_mg->eline_meta[i]); | |
447 | } | |
e411b331 JG |
448 | } |
449 | ||
450 | static void pblk_line_meta_free(struct pblk_line *line) | |
dffdd960 JG |
451 | { |
452 | kfree(line->blk_bitmap); | |
453 | kfree(line->erase_bitmap); | |
454 | } | |
455 | ||
a4bd217b JG |
456 | static void pblk_lines_free(struct pblk *pblk) |
457 | { | |
458 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
459 | struct pblk_line *line; | |
460 | int i; | |
461 | ||
462 | spin_lock(&l_mg->free_lock); | |
463 | for (i = 0; i < l_mg->nr_lines; i++) { | |
464 | line = &pblk->lines[i]; | |
465 | ||
466 | pblk_line_free(pblk, line); | |
e411b331 | 467 | pblk_line_meta_free(line); |
a4bd217b JG |
468 | } |
469 | spin_unlock(&l_mg->free_lock); | |
43d47127 JG |
470 | |
471 | pblk_line_mg_free(pblk); | |
472 | ||
473 | kfree(pblk->luns); | |
474 | kfree(pblk->lines); | |
a4bd217b JG |
475 | } |
476 | ||
e411b331 JG |
477 | static int pblk_bb_get_tbl(struct nvm_tgt_dev *dev, struct pblk_lun *rlun, |
478 | u8 *blks, int nr_blks) | |
a4bd217b | 479 | { |
a4bd217b | 480 | struct ppa_addr ppa; |
e411b331 | 481 | int ret; |
a4bd217b JG |
482 | |
483 | ppa.ppa = 0; | |
484 | ppa.g.ch = rlun->bppa.g.ch; | |
485 | ppa.g.lun = rlun->bppa.g.lun; | |
486 | ||
487 | ret = nvm_get_tgt_bb_tbl(dev, ppa, blks); | |
488 | if (ret) | |
e411b331 | 489 | return ret; |
a4bd217b JG |
490 | |
491 | nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks); | |
e411b331 JG |
492 | if (nr_blks < 0) |
493 | return -EIO; | |
a4bd217b | 494 | |
5136a4fd | 495 | return 0; |
a4bd217b JG |
496 | } |
497 | ||
e411b331 | 498 | static void *pblk_bb_get_log(struct pblk *pblk) |
a4bd217b | 499 | { |
dffdd960 JG |
500 | struct nvm_tgt_dev *dev = pblk->dev; |
501 | struct nvm_geo *geo = &dev->geo; | |
e411b331 JG |
502 | u8 *log; |
503 | int i, nr_blks, blk_per_lun; | |
504 | int ret; | |
a4bd217b | 505 | |
e411b331 JG |
506 | blk_per_lun = geo->nr_chks * geo->plane_mode; |
507 | nr_blks = blk_per_lun * geo->all_luns; | |
dffdd960 | 508 | |
e411b331 JG |
509 | log = kmalloc(nr_blks, GFP_KERNEL); |
510 | if (!log) | |
511 | return ERR_PTR(-ENOMEM); | |
512 | ||
513 | for (i = 0; i < geo->all_luns; i++) { | |
514 | struct pblk_lun *rlun = &pblk->luns[i]; | |
515 | u8 *log_pos = log + i * blk_per_lun; | |
516 | ||
517 | ret = pblk_bb_get_tbl(dev, rlun, log_pos, blk_per_lun); | |
518 | if (ret) { | |
519 | kfree(log); | |
520 | return ERR_PTR(-EIO); | |
521 | } | |
dffdd960 JG |
522 | } |
523 | ||
e411b331 | 524 | return log; |
dffdd960 JG |
525 | } |
526 | ||
e411b331 JG |
527 | static int pblk_bb_line(struct pblk *pblk, struct pblk_line *line, |
528 | u8 *bb_log, int blk_per_line) | |
dffdd960 | 529 | { |
e411b331 JG |
530 | struct nvm_tgt_dev *dev = pblk->dev; |
531 | struct nvm_geo *geo = &dev->geo; | |
532 | int i, bb_cnt = 0; | |
a38c78d8 | 533 | int blk_per_lun = geo->nr_chks * geo->plane_mode; |
dffdd960 | 534 | |
e411b331 JG |
535 | for (i = 0; i < blk_per_line; i++) { |
536 | struct pblk_lun *rlun = &pblk->luns[i]; | |
a38c78d8 | 537 | u8 *lun_bb_log = bb_log + i * blk_per_lun; |
a4bd217b | 538 | |
e411b331 JG |
539 | if (lun_bb_log[line->id] == NVM_BLK_T_FREE) |
540 | continue; | |
541 | ||
542 | set_bit(pblk_ppa_to_pos(geo, rlun->bppa), line->blk_bitmap); | |
543 | bb_cnt++; | |
a4bd217b JG |
544 | } |
545 | ||
e411b331 | 546 | return bb_cnt; |
a4bd217b JG |
547 | } |
548 | ||
43d47127 | 549 | static int pblk_luns_init(struct pblk *pblk) |
a4bd217b JG |
550 | { |
551 | struct nvm_tgt_dev *dev = pblk->dev; | |
552 | struct nvm_geo *geo = &dev->geo; | |
553 | struct pblk_lun *rlun; | |
e411b331 | 554 | int i; |
a4bd217b JG |
555 | |
556 | /* TODO: Implement unbalanced LUN support */ | |
fae7fae4 | 557 | if (geo->nr_luns < 0) { |
a4bd217b JG |
558 | pr_err("pblk: unbalanced LUN config.\n"); |
559 | return -EINVAL; | |
560 | } | |
561 | ||
fae7fae4 MB |
562 | pblk->luns = kcalloc(geo->all_luns, sizeof(struct pblk_lun), |
563 | GFP_KERNEL); | |
a4bd217b JG |
564 | if (!pblk->luns) |
565 | return -ENOMEM; | |
566 | ||
fae7fae4 | 567 | for (i = 0; i < geo->all_luns; i++) { |
a4bd217b JG |
568 | /* Stripe across channels */ |
569 | int ch = i % geo->nr_chnls; | |
570 | int lun_raw = i / geo->nr_chnls; | |
fae7fae4 | 571 | int lunid = lun_raw + ch * geo->nr_luns; |
a4bd217b JG |
572 | |
573 | rlun = &pblk->luns[i]; | |
43d47127 | 574 | rlun->bppa = dev->luns[lunid]; |
a4bd217b JG |
575 | |
576 | sema_init(&rlun->wr_sem, 1); | |
a4bd217b JG |
577 | } |
578 | ||
579 | return 0; | |
580 | } | |
581 | ||
a4bd217b | 582 | /* See comment over struct line_emeta definition */ |
dd2a4343 | 583 | static unsigned int calc_emeta_len(struct pblk *pblk) |
a4bd217b | 584 | { |
dd2a4343 JG |
585 | struct pblk_line_meta *lm = &pblk->lm; |
586 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
587 | struct nvm_tgt_dev *dev = pblk->dev; | |
588 | struct nvm_geo *geo = &dev->geo; | |
589 | ||
590 | /* Round to sector size so that lba_list starts on its own sector */ | |
591 | lm->emeta_sec[1] = DIV_ROUND_UP( | |
76758390 | 592 | sizeof(struct line_emeta) + lm->blk_bitmap_len + |
e46f4e48 JG |
593 | sizeof(struct wa_counters), geo->csecs); |
594 | lm->emeta_len[1] = lm->emeta_sec[1] * geo->csecs; | |
dd2a4343 JG |
595 | |
596 | /* Round to sector size so that vsc_list starts on its own sector */ | |
597 | lm->dsec_per_line = lm->sec_per_line - lm->emeta_sec[0]; | |
598 | lm->emeta_sec[2] = DIV_ROUND_UP(lm->dsec_per_line * sizeof(u64), | |
e46f4e48 JG |
599 | geo->csecs); |
600 | lm->emeta_len[2] = lm->emeta_sec[2] * geo->csecs; | |
dd2a4343 JG |
601 | |
602 | lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32), | |
e46f4e48 JG |
603 | geo->csecs); |
604 | lm->emeta_len[3] = lm->emeta_sec[3] * geo->csecs; | |
dd2a4343 JG |
605 | |
606 | lm->vsc_list_len = l_mg->nr_lines * sizeof(u32); | |
607 | ||
608 | return (lm->emeta_len[1] + lm->emeta_len[2] + lm->emeta_len[3]); | |
a4bd217b JG |
609 | } |
610 | ||
611 | static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) | |
612 | { | |
613 | struct nvm_tgt_dev *dev = pblk->dev; | |
a7689938 JG |
614 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
615 | struct pblk_line_meta *lm = &pblk->lm; | |
a4bd217b JG |
616 | struct nvm_geo *geo = &dev->geo; |
617 | sector_t provisioned; | |
a7689938 | 618 | int sec_meta, blk_meta; |
a4bd217b | 619 | |
e5392739 JG |
620 | if (geo->op == NVM_TARGET_DEFAULT_OP) |
621 | pblk->op = PBLK_DEFAULT_OP; | |
622 | else | |
623 | pblk->op = geo->op; | |
a4bd217b JG |
624 | |
625 | provisioned = nr_free_blks; | |
a7689938 | 626 | provisioned *= (100 - pblk->op); |
a4bd217b JG |
627 | sector_div(provisioned, 100); |
628 | ||
a7689938 JG |
629 | pblk->op_blks = nr_free_blks - provisioned; |
630 | ||
a4bd217b JG |
631 | /* Internally pblk manages all free blocks, but all calculations based |
632 | * on user capacity consider only provisioned blocks | |
633 | */ | |
634 | pblk->rl.total_blocks = nr_free_blks; | |
e46f4e48 | 635 | pblk->rl.nr_secs = nr_free_blks * geo->clba; |
a7689938 JG |
636 | |
637 | /* Consider sectors used for metadata */ | |
638 | sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines; | |
e46f4e48 | 639 | blk_meta = DIV_ROUND_UP(sec_meta, geo->clba); |
a7689938 | 640 | |
e46f4e48 | 641 | pblk->capacity = (provisioned - blk_meta) * geo->clba; |
a7689938 | 642 | |
a4bd217b | 643 | atomic_set(&pblk->rl.free_blocks, nr_free_blks); |
a7689938 | 644 | atomic_set(&pblk->rl.free_user_blocks, nr_free_blks); |
a4bd217b JG |
645 | } |
646 | ||
43d47127 JG |
647 | static int pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line, |
648 | void *chunk_log, long *nr_bad_blks) | |
649 | { | |
650 | struct pblk_line_meta *lm = &pblk->lm; | |
651 | ||
652 | line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); | |
653 | if (!line->blk_bitmap) | |
654 | return -ENOMEM; | |
655 | ||
656 | line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); | |
657 | if (!line->erase_bitmap) { | |
658 | kfree(line->blk_bitmap); | |
659 | return -ENOMEM; | |
660 | } | |
661 | ||
662 | *nr_bad_blks = pblk_bb_line(pblk, line, chunk_log, lm->blk_per_line); | |
663 | ||
664 | return 0; | |
665 | } | |
666 | ||
667 | static int pblk_line_mg_init(struct pblk *pblk) | |
dd2a4343 | 668 | { |
43d47127 JG |
669 | struct nvm_tgt_dev *dev = pblk->dev; |
670 | struct nvm_geo *geo = &dev->geo; | |
dd2a4343 JG |
671 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
672 | struct pblk_line_meta *lm = &pblk->lm; | |
43d47127 JG |
673 | int i, bb_distance; |
674 | ||
675 | l_mg->nr_lines = geo->nr_chks; | |
676 | l_mg->log_line = l_mg->data_line = NULL; | |
677 | l_mg->l_seq_nr = l_mg->d_seq_nr = 0; | |
678 | l_mg->nr_free_lines = 0; | |
679 | bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
680 | ||
681 | INIT_LIST_HEAD(&l_mg->free_list); | |
682 | INIT_LIST_HEAD(&l_mg->corrupt_list); | |
683 | INIT_LIST_HEAD(&l_mg->bad_list); | |
684 | INIT_LIST_HEAD(&l_mg->gc_full_list); | |
685 | INIT_LIST_HEAD(&l_mg->gc_high_list); | |
686 | INIT_LIST_HEAD(&l_mg->gc_mid_list); | |
687 | INIT_LIST_HEAD(&l_mg->gc_low_list); | |
688 | INIT_LIST_HEAD(&l_mg->gc_empty_list); | |
689 | ||
690 | INIT_LIST_HEAD(&l_mg->emeta_list); | |
691 | ||
692 | l_mg->gc_lists[0] = &l_mg->gc_high_list; | |
693 | l_mg->gc_lists[1] = &l_mg->gc_mid_list; | |
694 | l_mg->gc_lists[2] = &l_mg->gc_low_list; | |
695 | ||
696 | spin_lock_init(&l_mg->free_lock); | |
697 | spin_lock_init(&l_mg->close_lock); | |
698 | spin_lock_init(&l_mg->gc_lock); | |
699 | ||
700 | l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL); | |
701 | if (!l_mg->vsc_list) | |
702 | goto fail; | |
703 | ||
704 | l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
705 | if (!l_mg->bb_template) | |
706 | goto fail_free_vsc_list; | |
707 | ||
708 | l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
709 | if (!l_mg->bb_aux) | |
710 | goto fail_free_bb_template; | |
dd2a4343 JG |
711 | |
712 | /* smeta is always small enough to fit on a kmalloc memory allocation, | |
713 | * emeta depends on the number of LUNs allocated to the pblk instance | |
714 | */ | |
dd2a4343 JG |
715 | for (i = 0; i < PBLK_DATA_LINES; i++) { |
716 | l_mg->sline_meta[i] = kmalloc(lm->smeta_len, GFP_KERNEL); | |
717 | if (!l_mg->sline_meta[i]) | |
718 | goto fail_free_smeta; | |
719 | } | |
720 | ||
721 | /* emeta allocates three different buffers for managing metadata with | |
722 | * in-memory and in-media layouts | |
723 | */ | |
724 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
725 | struct pblk_emeta *emeta; | |
726 | ||
727 | emeta = kmalloc(sizeof(struct pblk_emeta), GFP_KERNEL); | |
728 | if (!emeta) | |
729 | goto fail_free_emeta; | |
730 | ||
731 | if (lm->emeta_len[0] > KMALLOC_MAX_CACHE_SIZE) { | |
732 | l_mg->emeta_alloc_type = PBLK_VMALLOC_META; | |
733 | ||
734 | emeta->buf = vmalloc(lm->emeta_len[0]); | |
735 | if (!emeta->buf) { | |
736 | kfree(emeta); | |
737 | goto fail_free_emeta; | |
738 | } | |
739 | ||
740 | emeta->nr_entries = lm->emeta_sec[0]; | |
741 | l_mg->eline_meta[i] = emeta; | |
742 | } else { | |
743 | l_mg->emeta_alloc_type = PBLK_KMALLOC_META; | |
744 | ||
745 | emeta->buf = kmalloc(lm->emeta_len[0], GFP_KERNEL); | |
746 | if (!emeta->buf) { | |
747 | kfree(emeta); | |
748 | goto fail_free_emeta; | |
749 | } | |
750 | ||
751 | emeta->nr_entries = lm->emeta_sec[0]; | |
752 | l_mg->eline_meta[i] = emeta; | |
753 | } | |
754 | } | |
755 | ||
dd2a4343 JG |
756 | for (i = 0; i < l_mg->nr_lines; i++) |
757 | l_mg->vsc_list[i] = cpu_to_le32(EMPTY_ENTRY); | |
758 | ||
43d47127 JG |
759 | bb_distance = (geo->all_luns) * geo->ws_opt; |
760 | for (i = 0; i < lm->sec_per_line; i += bb_distance) | |
761 | bitmap_set(l_mg->bb_template, i, geo->ws_opt); | |
762 | ||
dd2a4343 JG |
763 | return 0; |
764 | ||
765 | fail_free_emeta: | |
766 | while (--i >= 0) { | |
c9d84b35 RP |
767 | if (l_mg->emeta_alloc_type == PBLK_VMALLOC_META) |
768 | vfree(l_mg->eline_meta[i]->buf); | |
769 | else | |
770 | kfree(l_mg->eline_meta[i]->buf); | |
f680f19a | 771 | kfree(l_mg->eline_meta[i]); |
dd2a4343 | 772 | } |
dd2a4343 JG |
773 | fail_free_smeta: |
774 | for (i = 0; i < PBLK_DATA_LINES; i++) | |
f680f19a | 775 | kfree(l_mg->sline_meta[i]); |
43d47127 JG |
776 | kfree(l_mg->bb_aux); |
777 | fail_free_bb_template: | |
778 | kfree(l_mg->bb_template); | |
779 | fail_free_vsc_list: | |
780 | kfree(l_mg->vsc_list); | |
781 | fail: | |
dd2a4343 JG |
782 | return -ENOMEM; |
783 | } | |
784 | ||
43d47127 | 785 | static int pblk_line_meta_init(struct pblk *pblk) |
a4bd217b JG |
786 | { |
787 | struct nvm_tgt_dev *dev = pblk->dev; | |
788 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b | 789 | struct pblk_line_meta *lm = &pblk->lm; |
a4bd217b | 790 | unsigned int smeta_len, emeta_len; |
43d47127 | 791 | int i; |
a4bd217b | 792 | |
e46f4e48 | 793 | lm->sec_per_line = geo->clba * geo->all_luns; |
fae7fae4 MB |
794 | lm->blk_per_line = geo->all_luns; |
795 | lm->blk_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); | |
a4bd217b | 796 | lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long); |
fae7fae4 | 797 | lm->lun_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); |
27b97872 RP |
798 | lm->mid_thrs = lm->sec_per_line / 2; |
799 | lm->high_thrs = lm->sec_per_line / 4; | |
fae7fae4 | 800 | lm->meta_distance = (geo->all_luns / 2) * pblk->min_write_pgs; |
a4bd217b JG |
801 | |
802 | /* Calculate necessary pages for smeta. See comment over struct | |
803 | * line_smeta definition | |
804 | */ | |
a4bd217b JG |
805 | i = 1; |
806 | add_smeta_page: | |
e46f4e48 JG |
807 | lm->smeta_sec = i * geo->ws_opt; |
808 | lm->smeta_len = lm->smeta_sec * geo->csecs; | |
a4bd217b | 809 | |
dd2a4343 | 810 | smeta_len = sizeof(struct line_smeta) + lm->lun_bitmap_len; |
a4bd217b JG |
811 | if (smeta_len > lm->smeta_len) { |
812 | i++; | |
813 | goto add_smeta_page; | |
814 | } | |
815 | ||
816 | /* Calculate necessary pages for emeta. See comment over struct | |
817 | * line_emeta definition | |
818 | */ | |
819 | i = 1; | |
820 | add_emeta_page: | |
e46f4e48 JG |
821 | lm->emeta_sec[0] = i * geo->ws_opt; |
822 | lm->emeta_len[0] = lm->emeta_sec[0] * geo->csecs; | |
a4bd217b | 823 | |
dd2a4343 JG |
824 | emeta_len = calc_emeta_len(pblk); |
825 | if (emeta_len > lm->emeta_len[0]) { | |
a4bd217b JG |
826 | i++; |
827 | goto add_emeta_page; | |
828 | } | |
a4bd217b | 829 | |
fae7fae4 | 830 | lm->emeta_bb = geo->all_luns > i ? geo->all_luns - i : 0; |
21d22871 JG |
831 | |
832 | lm->min_blk_line = 1; | |
fae7fae4 | 833 | if (geo->all_luns > 1) |
21d22871 | 834 | lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec + |
e46f4e48 | 835 | lm->emeta_sec[0], geo->clba); |
21d22871 | 836 | |
b5e063a2 JG |
837 | if (lm->min_blk_line > lm->blk_per_line) { |
838 | pr_err("pblk: config. not supported. Min. LUN in line:%d\n", | |
839 | lm->blk_per_line); | |
e411b331 | 840 | return -EINVAL; |
b5e063a2 | 841 | } |
a4bd217b | 842 | |
43d47127 JG |
843 | return 0; |
844 | } | |
845 | ||
846 | static int pblk_lines_init(struct pblk *pblk) | |
847 | { | |
848 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
849 | struct pblk_line_meta *lm = &pblk->lm; | |
850 | struct pblk_line *line; | |
851 | void *chunk_log; | |
852 | long nr_bad_blks = 0, nr_free_blks = 0; | |
853 | int i, ret; | |
854 | ||
855 | ret = pblk_line_meta_init(pblk); | |
dd2a4343 | 856 | if (ret) |
e411b331 | 857 | return ret; |
a4bd217b | 858 | |
43d47127 JG |
859 | ret = pblk_line_mg_init(pblk); |
860 | if (ret) | |
861 | return ret; | |
862 | ||
863 | ret = pblk_luns_init(pblk); | |
864 | if (ret) | |
a4bd217b JG |
865 | goto fail_free_meta; |
866 | ||
43d47127 JG |
867 | chunk_log = pblk_bb_get_log(pblk); |
868 | if (IS_ERR(chunk_log)) { | |
869 | pr_err("pblk: could not get bad block log (%lu)\n", | |
870 | PTR_ERR(chunk_log)); | |
871 | ret = PTR_ERR(chunk_log); | |
872 | goto fail_free_luns; | |
1c6286f2 | 873 | } |
a4bd217b | 874 | |
a4bd217b JG |
875 | pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line), |
876 | GFP_KERNEL); | |
1c6286f2 DC |
877 | if (!pblk->lines) { |
878 | ret = -ENOMEM; | |
43d47127 | 879 | goto fail_free_chunk_log; |
e411b331 JG |
880 | } |
881 | ||
a4bd217b | 882 | for (i = 0; i < l_mg->nr_lines; i++) { |
e411b331 | 883 | int chk_in_line; |
a44f53fa | 884 | |
a4bd217b JG |
885 | line = &pblk->lines[i]; |
886 | ||
887 | line->pblk = pblk; | |
888 | line->id = i; | |
889 | line->type = PBLK_LINETYPE_FREE; | |
890 | line->state = PBLK_LINESTATE_FREE; | |
891 | line->gc_group = PBLK_LINEGC_NONE; | |
dd2a4343 | 892 | line->vsc = &l_mg->vsc_list[i]; |
a4bd217b JG |
893 | spin_lock_init(&line->lock); |
894 | ||
e411b331 | 895 | ret = pblk_setup_line_meta(pblk, line, chunk_log, &nr_bad_blks); |
dffdd960 | 896 | if (ret) |
43d47127 | 897 | goto fail_free_lines; |
dffdd960 | 898 | |
e411b331 JG |
899 | chk_in_line = lm->blk_per_line - nr_bad_blks; |
900 | if (nr_bad_blks < 0 || nr_bad_blks > lm->blk_per_line || | |
901 | chk_in_line < lm->min_blk_line) { | |
a4bd217b JG |
902 | line->state = PBLK_LINESTATE_BAD; |
903 | list_add_tail(&line->list, &l_mg->bad_list); | |
904 | continue; | |
905 | } | |
906 | ||
e411b331 JG |
907 | nr_free_blks += chk_in_line; |
908 | atomic_set(&line->blk_in_line, chk_in_line); | |
a4bd217b JG |
909 | |
910 | l_mg->nr_free_lines++; | |
911 | list_add_tail(&line->list, &l_mg->free_list); | |
912 | } | |
913 | ||
914 | pblk_set_provision(pblk, nr_free_blks); | |
915 | ||
e411b331 | 916 | kfree(chunk_log); |
a4bd217b | 917 | return 0; |
e411b331 | 918 | |
43d47127 | 919 | fail_free_lines: |
dffdd960 | 920 | while (--i >= 0) |
e411b331 | 921 | pblk_line_meta_free(&pblk->lines[i]); |
43d47127 JG |
922 | kfree(pblk->lines); |
923 | fail_free_chunk_log: | |
924 | kfree(chunk_log); | |
925 | fail_free_luns: | |
926 | kfree(pblk->luns); | |
a4bd217b | 927 | fail_free_meta: |
e411b331 | 928 | pblk_line_mg_free(pblk); |
a4bd217b JG |
929 | |
930 | return ret; | |
931 | } | |
932 | ||
933 | static int pblk_writer_init(struct pblk *pblk) | |
934 | { | |
a4bd217b JG |
935 | pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t"); |
936 | if (IS_ERR(pblk->writer_ts)) { | |
cc4f5ba1 JG |
937 | int err = PTR_ERR(pblk->writer_ts); |
938 | ||
939 | if (err != -EINTR) | |
940 | pr_err("pblk: could not allocate writer kthread (%d)\n", | |
941 | err); | |
942 | return err; | |
a4bd217b JG |
943 | } |
944 | ||
cc4f5ba1 JG |
945 | timer_setup(&pblk->wtimer, pblk_write_timer_fn, 0); |
946 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); | |
947 | ||
a4bd217b JG |
948 | return 0; |
949 | } | |
950 | ||
951 | static void pblk_writer_stop(struct pblk *pblk) | |
952 | { | |
ee8d5c1a JG |
953 | /* The pipeline must be stopped and the write buffer emptied before the |
954 | * write thread is stopped | |
955 | */ | |
956 | WARN(pblk_rb_read_count(&pblk->rwb), | |
957 | "Stopping not fully persisted write buffer\n"); | |
958 | ||
959 | WARN(pblk_rb_sync_count(&pblk->rwb), | |
960 | "Stopping not fully synced write buffer\n"); | |
961 | ||
7be970b2 | 962 | del_timer_sync(&pblk->wtimer); |
a4bd217b JG |
963 | if (pblk->writer_ts) |
964 | kthread_stop(pblk->writer_ts); | |
a4bd217b JG |
965 | } |
966 | ||
967 | static void pblk_free(struct pblk *pblk) | |
968 | { | |
a4bd217b | 969 | pblk_lines_free(pblk); |
a4bd217b | 970 | pblk_l2p_free(pblk); |
43d47127 JG |
971 | pblk_rwb_free(pblk); |
972 | pblk_core_free(pblk); | |
a4bd217b JG |
973 | |
974 | kfree(pblk); | |
975 | } | |
976 | ||
977 | static void pblk_tear_down(struct pblk *pblk) | |
978 | { | |
588726d3 | 979 | pblk_pipeline_stop(pblk); |
a4bd217b JG |
980 | pblk_writer_stop(pblk); |
981 | pblk_rb_sync_l2p(&pblk->rwb); | |
a4bd217b JG |
982 | pblk_rl_free(&pblk->rl); |
983 | ||
984 | pr_debug("pblk: consistent tear down\n"); | |
985 | } | |
986 | ||
987 | static void pblk_exit(void *private) | |
988 | { | |
989 | struct pblk *pblk = private; | |
990 | ||
991 | down_write(&pblk_lock); | |
992 | pblk_gc_exit(pblk); | |
993 | pblk_tear_down(pblk); | |
c5586192 HH |
994 | |
995 | #ifdef CONFIG_NVM_DEBUG | |
996 | pr_info("pblk exit: L2P CRC: %x\n", pblk_l2p_crc(pblk)); | |
997 | #endif | |
998 | ||
a4bd217b JG |
999 | pblk_free(pblk); |
1000 | up_write(&pblk_lock); | |
1001 | } | |
1002 | ||
1003 | static sector_t pblk_capacity(void *private) | |
1004 | { | |
1005 | struct pblk *pblk = private; | |
1006 | ||
1007 | return pblk->capacity * NR_PHY_IN_LOG; | |
1008 | } | |
1009 | ||
1010 | static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, | |
1011 | int flags) | |
1012 | { | |
1013 | struct nvm_geo *geo = &dev->geo; | |
1014 | struct request_queue *bqueue = dev->q; | |
1015 | struct request_queue *tqueue = tdisk->queue; | |
1016 | struct pblk *pblk; | |
1017 | int ret; | |
1018 | ||
e46f4e48 | 1019 | if (dev->geo.dom & NVM_RSP_L2P) { |
4e76af53 | 1020 | pr_err("pblk: host-side L2P table not supported. (%x)\n", |
e46f4e48 | 1021 | dev->geo.dom); |
a4bd217b JG |
1022 | return ERR_PTR(-EINVAL); |
1023 | } | |
1024 | ||
1025 | pblk = kzalloc(sizeof(struct pblk), GFP_KERNEL); | |
1026 | if (!pblk) | |
1027 | return ERR_PTR(-ENOMEM); | |
1028 | ||
1029 | pblk->dev = dev; | |
1030 | pblk->disk = tdisk; | |
588726d3 | 1031 | pblk->state = PBLK_STATE_RUNNING; |
3e3a5b8e | 1032 | pblk->gc.gc_enabled = 0; |
a4bd217b JG |
1033 | |
1034 | spin_lock_init(&pblk->trans_lock); | |
1035 | spin_lock_init(&pblk->lock); | |
1036 | ||
a4bd217b JG |
1037 | #ifdef CONFIG_NVM_DEBUG |
1038 | atomic_long_set(&pblk->inflight_writes, 0); | |
1039 | atomic_long_set(&pblk->padded_writes, 0); | |
1040 | atomic_long_set(&pblk->padded_wb, 0); | |
a4bd217b JG |
1041 | atomic_long_set(&pblk->req_writes, 0); |
1042 | atomic_long_set(&pblk->sub_writes, 0); | |
1043 | atomic_long_set(&pblk->sync_writes, 0); | |
a4bd217b | 1044 | atomic_long_set(&pblk->inflight_reads, 0); |
db7ada33 | 1045 | atomic_long_set(&pblk->cache_reads, 0); |
a4bd217b JG |
1046 | atomic_long_set(&pblk->sync_reads, 0); |
1047 | atomic_long_set(&pblk->recov_writes, 0); | |
1048 | atomic_long_set(&pblk->recov_writes, 0); | |
1049 | atomic_long_set(&pblk->recov_gc_writes, 0); | |
a1121176 | 1050 | atomic_long_set(&pblk->recov_gc_reads, 0); |
a4bd217b JG |
1051 | #endif |
1052 | ||
1053 | atomic_long_set(&pblk->read_failed, 0); | |
1054 | atomic_long_set(&pblk->read_empty, 0); | |
1055 | atomic_long_set(&pblk->read_high_ecc, 0); | |
1056 | atomic_long_set(&pblk->read_failed_gc, 0); | |
1057 | atomic_long_set(&pblk->write_failed, 0); | |
1058 | atomic_long_set(&pblk->erase_failed, 0); | |
1059 | ||
43d47127 | 1060 | ret = pblk_core_init(pblk); |
a4bd217b | 1061 | if (ret) { |
43d47127 | 1062 | pr_err("pblk: could not initialize core\n"); |
a4bd217b JG |
1063 | goto fail; |
1064 | } | |
1065 | ||
1066 | ret = pblk_lines_init(pblk); | |
1067 | if (ret) { | |
1068 | pr_err("pblk: could not initialize lines\n"); | |
43d47127 | 1069 | goto fail_free_core; |
5d149bfa HH |
1070 | } |
1071 | ||
43d47127 | 1072 | ret = pblk_rwb_init(pblk); |
a4bd217b | 1073 | if (ret) { |
43d47127 JG |
1074 | pr_err("pblk: could not initialize write buffer\n"); |
1075 | goto fail_free_lines; | |
a4bd217b JG |
1076 | } |
1077 | ||
43d47127 | 1078 | ret = pblk_l2p_init(pblk, flags & NVM_TARGET_FACTORY); |
a4bd217b JG |
1079 | if (ret) { |
1080 | pr_err("pblk: could not initialize maps\n"); | |
43d47127 | 1081 | goto fail_free_rwb; |
a4bd217b JG |
1082 | } |
1083 | ||
1084 | ret = pblk_writer_init(pblk); | |
1085 | if (ret) { | |
cc4f5ba1 JG |
1086 | if (ret != -EINTR) |
1087 | pr_err("pblk: could not initialize write thread\n"); | |
43d47127 | 1088 | goto fail_free_l2p; |
a4bd217b JG |
1089 | } |
1090 | ||
1091 | ret = pblk_gc_init(pblk); | |
1092 | if (ret) { | |
1093 | pr_err("pblk: could not initialize gc\n"); | |
1094 | goto fail_stop_writer; | |
1095 | } | |
1096 | ||
1097 | /* inherit the size from the underlying device */ | |
1098 | blk_queue_logical_block_size(tqueue, queue_physical_block_size(bqueue)); | |
1099 | blk_queue_max_hw_sectors(tqueue, queue_max_hw_sectors(bqueue)); | |
1100 | ||
1101 | blk_queue_write_cache(tqueue, true, false); | |
1102 | ||
e46f4e48 | 1103 | tqueue->limits.discard_granularity = geo->clba * geo->csecs; |
a4bd217b JG |
1104 | tqueue->limits.discard_alignment = 0; |
1105 | blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); | |
8b904b5b | 1106 | blk_queue_flag_set(QUEUE_FLAG_DISCARD, tqueue); |
a4bd217b | 1107 | |
30d82a86 JG |
1108 | pr_info("pblk(%s): luns:%u, lines:%d, secs:%llu, buf entries:%u\n", |
1109 | tdisk->disk_name, | |
fae7fae4 | 1110 | geo->all_luns, pblk->l_mg.nr_lines, |
a4bd217b JG |
1111 | (unsigned long long)pblk->rl.nr_secs, |
1112 | pblk->rwb.nr_entries); | |
1113 | ||
1114 | wake_up_process(pblk->writer_ts); | |
03661b5f HH |
1115 | |
1116 | /* Check if we need to start GC */ | |
1117 | pblk_gc_should_kick(pblk); | |
1118 | ||
a4bd217b JG |
1119 | return pblk; |
1120 | ||
1121 | fail_stop_writer: | |
1122 | pblk_writer_stop(pblk); | |
a4bd217b JG |
1123 | fail_free_l2p: |
1124 | pblk_l2p_free(pblk); | |
43d47127 JG |
1125 | fail_free_rwb: |
1126 | pblk_rwb_free(pblk); | |
1127 | fail_free_lines: | |
1128 | pblk_lines_free(pblk); | |
a4bd217b JG |
1129 | fail_free_core: |
1130 | pblk_core_free(pblk); | |
a4bd217b JG |
1131 | fail: |
1132 | kfree(pblk); | |
1133 | return ERR_PTR(ret); | |
1134 | } | |
1135 | ||
1136 | /* physical block device target */ | |
1137 | static struct nvm_tgt_type tt_pblk = { | |
1138 | .name = "pblk", | |
1139 | .version = {1, 0, 0}, | |
1140 | ||
1141 | .make_rq = pblk_make_rq, | |
1142 | .capacity = pblk_capacity, | |
1143 | ||
1144 | .init = pblk_init, | |
1145 | .exit = pblk_exit, | |
1146 | ||
1147 | .sysfs_init = pblk_sysfs_init, | |
1148 | .sysfs_exit = pblk_sysfs_exit, | |
90014829 | 1149 | .owner = THIS_MODULE, |
a4bd217b JG |
1150 | }; |
1151 | ||
1152 | static int __init pblk_module_init(void) | |
1153 | { | |
b25d5237 N |
1154 | int ret; |
1155 | ||
1156 | pblk_bio_set = bioset_create(BIO_POOL_SIZE, 0, 0); | |
1157 | if (!pblk_bio_set) | |
1158 | return -ENOMEM; | |
1159 | ret = nvm_register_tgt_type(&tt_pblk); | |
1160 | if (ret) | |
1161 | bioset_free(pblk_bio_set); | |
1162 | return ret; | |
a4bd217b JG |
1163 | } |
1164 | ||
1165 | static void pblk_module_exit(void) | |
1166 | { | |
b25d5237 | 1167 | bioset_free(pblk_bio_set); |
a4bd217b JG |
1168 | nvm_unregister_tgt_type(&tt_pblk); |
1169 | } | |
1170 | ||
1171 | module_init(pblk_module_init); | |
1172 | module_exit(pblk_module_exit); | |
1173 | MODULE_AUTHOR("Javier Gonzalez <javier@cnexlabs.com>"); | |
1174 | MODULE_AUTHOR("Matias Bjorling <matias@cnexlabs.com>"); | |
1175 | MODULE_LICENSE("GPL v2"); | |
1176 | MODULE_DESCRIPTION("Physical Block-Device for Open-Channel SSDs"); |