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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, |
084ec9ba | 24 | *pblk_w_rq_cache, *pblk_line_meta_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 | ||
79 | static void pblk_l2p_free(struct pblk *pblk) | |
80 | { | |
81 | vfree(pblk->trans_map); | |
82 | } | |
83 | ||
84 | static int pblk_l2p_init(struct pblk *pblk) | |
85 | { | |
86 | sector_t i; | |
87 | struct ppa_addr ppa; | |
88 | int entry_size = 8; | |
89 | ||
90 | if (pblk->ppaf_bitsize < 32) | |
91 | entry_size = 4; | |
92 | ||
93 | pblk->trans_map = vmalloc(entry_size * pblk->rl.nr_secs); | |
94 | if (!pblk->trans_map) | |
95 | return -ENOMEM; | |
96 | ||
97 | pblk_ppa_set_empty(&ppa); | |
98 | ||
99 | for (i = 0; i < pblk->rl.nr_secs; i++) | |
100 | pblk_trans_map_set(pblk, i, ppa); | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | static void pblk_rwb_free(struct pblk *pblk) | |
106 | { | |
107 | if (pblk_rb_tear_down_check(&pblk->rwb)) | |
108 | pr_err("pblk: write buffer error on tear down\n"); | |
109 | ||
110 | pblk_rb_data_free(&pblk->rwb); | |
111 | vfree(pblk_rb_entries_ref(&pblk->rwb)); | |
112 | } | |
113 | ||
114 | static int pblk_rwb_init(struct pblk *pblk) | |
115 | { | |
116 | struct nvm_tgt_dev *dev = pblk->dev; | |
117 | struct nvm_geo *geo = &dev->geo; | |
118 | struct pblk_rb_entry *entries; | |
119 | unsigned long nr_entries; | |
120 | unsigned int power_size, power_seg_sz; | |
121 | ||
122 | nr_entries = pblk_rb_calculate_size(pblk->pgs_in_buffer); | |
123 | ||
124 | entries = vzalloc(nr_entries * sizeof(struct pblk_rb_entry)); | |
125 | if (!entries) | |
126 | return -ENOMEM; | |
127 | ||
128 | power_size = get_count_order(nr_entries); | |
129 | power_seg_sz = get_count_order(geo->sec_size); | |
130 | ||
131 | return pblk_rb_init(&pblk->rwb, entries, power_size, power_seg_sz); | |
132 | } | |
133 | ||
134 | /* Minimum pages needed within a lun */ | |
a4bd217b JG |
135 | #define ADDR_POOL_SIZE 64 |
136 | ||
137 | static int pblk_set_ppaf(struct pblk *pblk) | |
138 | { | |
139 | struct nvm_tgt_dev *dev = pblk->dev; | |
140 | struct nvm_geo *geo = &dev->geo; | |
141 | struct nvm_addr_format ppaf = geo->ppaf; | |
142 | int power_len; | |
143 | ||
144 | /* Re-calculate channel and lun format to adapt to configuration */ | |
145 | power_len = get_count_order(geo->nr_chnls); | |
146 | if (1 << power_len != geo->nr_chnls) { | |
147 | pr_err("pblk: supports only power-of-two channel config.\n"); | |
148 | return -EINVAL; | |
149 | } | |
150 | ppaf.ch_len = power_len; | |
151 | ||
152 | power_len = get_count_order(geo->luns_per_chnl); | |
153 | if (1 << power_len != geo->luns_per_chnl) { | |
154 | pr_err("pblk: supports only power-of-two LUN config.\n"); | |
155 | return -EINVAL; | |
156 | } | |
157 | ppaf.lun_len = power_len; | |
158 | ||
159 | pblk->ppaf.sec_offset = 0; | |
160 | pblk->ppaf.pln_offset = ppaf.sect_len; | |
161 | pblk->ppaf.ch_offset = pblk->ppaf.pln_offset + ppaf.pln_len; | |
162 | pblk->ppaf.lun_offset = pblk->ppaf.ch_offset + ppaf.ch_len; | |
163 | pblk->ppaf.pg_offset = pblk->ppaf.lun_offset + ppaf.lun_len; | |
164 | pblk->ppaf.blk_offset = pblk->ppaf.pg_offset + ppaf.pg_len; | |
165 | pblk->ppaf.sec_mask = (1ULL << ppaf.sect_len) - 1; | |
166 | pblk->ppaf.pln_mask = ((1ULL << ppaf.pln_len) - 1) << | |
167 | pblk->ppaf.pln_offset; | |
168 | pblk->ppaf.ch_mask = ((1ULL << ppaf.ch_len) - 1) << | |
169 | pblk->ppaf.ch_offset; | |
170 | pblk->ppaf.lun_mask = ((1ULL << ppaf.lun_len) - 1) << | |
171 | pblk->ppaf.lun_offset; | |
172 | pblk->ppaf.pg_mask = ((1ULL << ppaf.pg_len) - 1) << | |
173 | pblk->ppaf.pg_offset; | |
174 | pblk->ppaf.blk_mask = ((1ULL << ppaf.blk_len) - 1) << | |
175 | pblk->ppaf.blk_offset; | |
176 | ||
177 | pblk->ppaf_bitsize = pblk->ppaf.blk_offset + ppaf.blk_len; | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | static int pblk_init_global_caches(struct pblk *pblk) | |
183 | { | |
184 | char cache_name[PBLK_CACHE_NAME_LEN]; | |
185 | ||
186 | down_write(&pblk_lock); | |
b84ae4a8 | 187 | pblk_ws_cache = kmem_cache_create("pblk_blk_ws", |
a4bd217b | 188 | sizeof(struct pblk_line_ws), 0, 0, NULL); |
b84ae4a8 | 189 | if (!pblk_ws_cache) { |
a4bd217b JG |
190 | up_write(&pblk_lock); |
191 | return -ENOMEM; | |
192 | } | |
193 | ||
194 | pblk_rec_cache = kmem_cache_create("pblk_rec", | |
195 | sizeof(struct pblk_rec_ctx), 0, 0, NULL); | |
196 | if (!pblk_rec_cache) { | |
b84ae4a8 | 197 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
198 | up_write(&pblk_lock); |
199 | return -ENOMEM; | |
200 | } | |
201 | ||
084ec9ba | 202 | pblk_g_rq_cache = kmem_cache_create("pblk_g_rq", pblk_g_rq_size, |
a4bd217b | 203 | 0, 0, NULL); |
084ec9ba | 204 | if (!pblk_g_rq_cache) { |
b84ae4a8 | 205 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
206 | kmem_cache_destroy(pblk_rec_cache); |
207 | up_write(&pblk_lock); | |
208 | return -ENOMEM; | |
209 | } | |
210 | ||
211 | pblk_w_rq_cache = kmem_cache_create("pblk_w_rq", pblk_w_rq_size, | |
212 | 0, 0, NULL); | |
213 | if (!pblk_w_rq_cache) { | |
b84ae4a8 | 214 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b | 215 | kmem_cache_destroy(pblk_rec_cache); |
084ec9ba | 216 | kmem_cache_destroy(pblk_g_rq_cache); |
a4bd217b JG |
217 | up_write(&pblk_lock); |
218 | return -ENOMEM; | |
219 | } | |
220 | ||
221 | snprintf(cache_name, sizeof(cache_name), "pblk_line_m_%s", | |
222 | pblk->disk->disk_name); | |
223 | pblk_line_meta_cache = kmem_cache_create(cache_name, | |
224 | pblk->lm.sec_bitmap_len, 0, 0, NULL); | |
225 | if (!pblk_line_meta_cache) { | |
b84ae4a8 | 226 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b | 227 | kmem_cache_destroy(pblk_rec_cache); |
084ec9ba | 228 | kmem_cache_destroy(pblk_g_rq_cache); |
a4bd217b JG |
229 | kmem_cache_destroy(pblk_w_rq_cache); |
230 | up_write(&pblk_lock); | |
231 | return -ENOMEM; | |
232 | } | |
233 | up_write(&pblk_lock); | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | static int pblk_core_init(struct pblk *pblk) | |
239 | { | |
240 | struct nvm_tgt_dev *dev = pblk->dev; | |
241 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b | 242 | |
a4bd217b JG |
243 | pblk->pgs_in_buffer = NVM_MEM_PAGE_WRITE * geo->sec_per_pg * |
244 | geo->nr_planes * geo->nr_luns; | |
245 | ||
a4bd217b JG |
246 | if (pblk_init_global_caches(pblk)) |
247 | return -ENOMEM; | |
248 | ||
b84ae4a8 | 249 | /* Internal bios can be at most the sectors signaled by the device. */ |
bd432417 JG |
250 | pblk->page_bio_pool = mempool_create_page_pool(nvm_max_phys_sects(dev), |
251 | 0); | |
252 | if (!pblk->page_bio_pool) | |
a4bd217b JG |
253 | return -ENOMEM; |
254 | ||
b84ae4a8 JG |
255 | pblk->gen_ws_pool = mempool_create_slab_pool(PBLK_GEN_WS_POOL_SIZE, |
256 | pblk_ws_cache); | |
257 | if (!pblk->gen_ws_pool) | |
bd432417 | 258 | goto free_page_bio_pool; |
a4bd217b JG |
259 | |
260 | pblk->rec_pool = mempool_create_slab_pool(geo->nr_luns, pblk_rec_cache); | |
261 | if (!pblk->rec_pool) | |
b84ae4a8 | 262 | goto free_gen_ws_pool; |
a4bd217b | 263 | |
ef576494 JG |
264 | pblk->g_rq_pool = mempool_create_slab_pool(PBLK_READ_REQ_POOL_SIZE, |
265 | pblk_g_rq_cache); | |
084ec9ba | 266 | if (!pblk->g_rq_pool) |
a4bd217b JG |
267 | goto free_rec_pool; |
268 | ||
ef576494 JG |
269 | pblk->w_rq_pool = mempool_create_slab_pool(geo->nr_luns * 2, |
270 | pblk_w_rq_cache); | |
a4bd217b | 271 | if (!pblk->w_rq_pool) |
084ec9ba | 272 | goto free_g_rq_pool; |
a4bd217b JG |
273 | |
274 | pblk->line_meta_pool = | |
ef576494 JG |
275 | mempool_create_slab_pool(PBLK_META_POOL_SIZE, |
276 | pblk_line_meta_cache); | |
a4bd217b JG |
277 | if (!pblk->line_meta_pool) |
278 | goto free_w_rq_pool; | |
279 | ||
ef576494 JG |
280 | pblk->close_wq = alloc_workqueue("pblk-close-wq", |
281 | WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_NR_CLOSE_JOBS); | |
282 | if (!pblk->close_wq) | |
a4bd217b JG |
283 | goto free_line_meta_pool; |
284 | ||
ef576494 JG |
285 | pblk->bb_wq = alloc_workqueue("pblk-bb-wq", |
286 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
287 | if (!pblk->bb_wq) | |
288 | goto free_close_wq; | |
289 | ||
a4bd217b | 290 | if (pblk_set_ppaf(pblk)) |
ef576494 | 291 | goto free_bb_wq; |
a4bd217b JG |
292 | |
293 | if (pblk_rwb_init(pblk)) | |
ef576494 | 294 | goto free_bb_wq; |
a4bd217b JG |
295 | |
296 | INIT_LIST_HEAD(&pblk->compl_list); | |
297 | return 0; | |
298 | ||
ef576494 JG |
299 | free_bb_wq: |
300 | destroy_workqueue(pblk->bb_wq); | |
301 | free_close_wq: | |
302 | destroy_workqueue(pblk->close_wq); | |
a4bd217b JG |
303 | free_line_meta_pool: |
304 | mempool_destroy(pblk->line_meta_pool); | |
305 | free_w_rq_pool: | |
306 | mempool_destroy(pblk->w_rq_pool); | |
084ec9ba JG |
307 | free_g_rq_pool: |
308 | mempool_destroy(pblk->g_rq_pool); | |
a4bd217b JG |
309 | free_rec_pool: |
310 | mempool_destroy(pblk->rec_pool); | |
b84ae4a8 JG |
311 | free_gen_ws_pool: |
312 | mempool_destroy(pblk->gen_ws_pool); | |
bd432417 JG |
313 | free_page_bio_pool: |
314 | mempool_destroy(pblk->page_bio_pool); | |
a4bd217b JG |
315 | return -ENOMEM; |
316 | } | |
317 | ||
318 | static void pblk_core_free(struct pblk *pblk) | |
319 | { | |
ef576494 JG |
320 | if (pblk->close_wq) |
321 | destroy_workqueue(pblk->close_wq); | |
322 | ||
323 | if (pblk->bb_wq) | |
324 | destroy_workqueue(pblk->bb_wq); | |
a4bd217b | 325 | |
bd432417 | 326 | mempool_destroy(pblk->page_bio_pool); |
b84ae4a8 | 327 | mempool_destroy(pblk->gen_ws_pool); |
a4bd217b | 328 | mempool_destroy(pblk->rec_pool); |
084ec9ba | 329 | mempool_destroy(pblk->g_rq_pool); |
a4bd217b JG |
330 | mempool_destroy(pblk->w_rq_pool); |
331 | mempool_destroy(pblk->line_meta_pool); | |
332 | ||
b84ae4a8 | 333 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b | 334 | kmem_cache_destroy(pblk_rec_cache); |
084ec9ba | 335 | kmem_cache_destroy(pblk_g_rq_cache); |
a4bd217b JG |
336 | kmem_cache_destroy(pblk_w_rq_cache); |
337 | kmem_cache_destroy(pblk_line_meta_cache); | |
338 | } | |
339 | ||
340 | static void pblk_luns_free(struct pblk *pblk) | |
341 | { | |
342 | kfree(pblk->luns); | |
343 | } | |
344 | ||
dffdd960 JG |
345 | static void pblk_free_line_bitmaps(struct pblk_line *line) |
346 | { | |
347 | kfree(line->blk_bitmap); | |
348 | kfree(line->erase_bitmap); | |
349 | } | |
350 | ||
a4bd217b JG |
351 | static void pblk_lines_free(struct pblk *pblk) |
352 | { | |
353 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
354 | struct pblk_line *line; | |
355 | int i; | |
356 | ||
357 | spin_lock(&l_mg->free_lock); | |
358 | for (i = 0; i < l_mg->nr_lines; i++) { | |
359 | line = &pblk->lines[i]; | |
360 | ||
361 | pblk_line_free(pblk, line); | |
dffdd960 | 362 | pblk_free_line_bitmaps(line); |
a4bd217b JG |
363 | } |
364 | spin_unlock(&l_mg->free_lock); | |
365 | } | |
366 | ||
367 | static void pblk_line_meta_free(struct pblk *pblk) | |
368 | { | |
369 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
370 | int i; | |
371 | ||
372 | kfree(l_mg->bb_template); | |
373 | kfree(l_mg->bb_aux); | |
dd2a4343 | 374 | kfree(l_mg->vsc_list); |
a4bd217b | 375 | |
588726d3 | 376 | spin_lock(&l_mg->free_lock); |
a4bd217b | 377 | for (i = 0; i < PBLK_DATA_LINES; i++) { |
f680f19a | 378 | kfree(l_mg->sline_meta[i]); |
dd2a4343 | 379 | pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type); |
f680f19a | 380 | kfree(l_mg->eline_meta[i]); |
a4bd217b | 381 | } |
588726d3 | 382 | spin_unlock(&l_mg->free_lock); |
a4bd217b JG |
383 | |
384 | kfree(pblk->lines); | |
385 | } | |
386 | ||
387 | static int pblk_bb_discovery(struct nvm_tgt_dev *dev, struct pblk_lun *rlun) | |
388 | { | |
389 | struct nvm_geo *geo = &dev->geo; | |
390 | struct ppa_addr ppa; | |
391 | u8 *blks; | |
392 | int nr_blks, ret; | |
393 | ||
394 | nr_blks = geo->blks_per_lun * geo->plane_mode; | |
395 | blks = kmalloc(nr_blks, GFP_KERNEL); | |
396 | if (!blks) | |
397 | return -ENOMEM; | |
398 | ||
399 | ppa.ppa = 0; | |
400 | ppa.g.ch = rlun->bppa.g.ch; | |
401 | ppa.g.lun = rlun->bppa.g.lun; | |
402 | ||
403 | ret = nvm_get_tgt_bb_tbl(dev, ppa, blks); | |
404 | if (ret) | |
405 | goto out; | |
406 | ||
407 | nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks); | |
408 | if (nr_blks < 0) { | |
a4bd217b | 409 | ret = nr_blks; |
5136a4fd | 410 | goto out; |
a4bd217b JG |
411 | } |
412 | ||
413 | rlun->bb_list = blks; | |
414 | ||
5136a4fd | 415 | return 0; |
a4bd217b | 416 | out: |
5136a4fd | 417 | kfree(blks); |
a4bd217b JG |
418 | return ret; |
419 | } | |
420 | ||
dffdd960 JG |
421 | static int pblk_bb_line(struct pblk *pblk, struct pblk_line *line, |
422 | int blk_per_line) | |
a4bd217b | 423 | { |
dffdd960 JG |
424 | struct nvm_tgt_dev *dev = pblk->dev; |
425 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b JG |
426 | struct pblk_lun *rlun; |
427 | int bb_cnt = 0; | |
428 | int i; | |
429 | ||
dffdd960 JG |
430 | for (i = 0; i < blk_per_line; i++) { |
431 | rlun = &pblk->luns[i]; | |
432 | if (rlun->bb_list[line->id] == NVM_BLK_T_FREE) | |
433 | continue; | |
434 | ||
435 | set_bit(pblk_ppa_to_pos(geo, rlun->bppa), line->blk_bitmap); | |
436 | bb_cnt++; | |
437 | } | |
438 | ||
439 | return bb_cnt; | |
440 | } | |
441 | ||
442 | static int pblk_alloc_line_bitmaps(struct pblk *pblk, struct pblk_line *line) | |
443 | { | |
444 | struct pblk_line_meta *lm = &pblk->lm; | |
445 | ||
a4bd217b JG |
446 | line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); |
447 | if (!line->blk_bitmap) | |
448 | return -ENOMEM; | |
449 | ||
450 | line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); | |
451 | if (!line->erase_bitmap) { | |
452 | kfree(line->blk_bitmap); | |
453 | return -ENOMEM; | |
454 | } | |
455 | ||
dffdd960 | 456 | return 0; |
a4bd217b JG |
457 | } |
458 | ||
459 | static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns) | |
460 | { | |
461 | struct nvm_tgt_dev *dev = pblk->dev; | |
462 | struct nvm_geo *geo = &dev->geo; | |
463 | struct pblk_lun *rlun; | |
464 | int i, ret; | |
465 | ||
466 | /* TODO: Implement unbalanced LUN support */ | |
467 | if (geo->luns_per_chnl < 0) { | |
468 | pr_err("pblk: unbalanced LUN config.\n"); | |
469 | return -EINVAL; | |
470 | } | |
471 | ||
472 | pblk->luns = kcalloc(geo->nr_luns, sizeof(struct pblk_lun), GFP_KERNEL); | |
473 | if (!pblk->luns) | |
474 | return -ENOMEM; | |
475 | ||
476 | for (i = 0; i < geo->nr_luns; i++) { | |
477 | /* Stripe across channels */ | |
478 | int ch = i % geo->nr_chnls; | |
479 | int lun_raw = i / geo->nr_chnls; | |
480 | int lunid = lun_raw + ch * geo->luns_per_chnl; | |
481 | ||
482 | rlun = &pblk->luns[i]; | |
483 | rlun->bppa = luns[lunid]; | |
484 | ||
485 | sema_init(&rlun->wr_sem, 1); | |
486 | ||
487 | ret = pblk_bb_discovery(dev, rlun); | |
488 | if (ret) { | |
489 | while (--i >= 0) | |
490 | kfree(pblk->luns[i].bb_list); | |
491 | return ret; | |
492 | } | |
493 | } | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | static int pblk_lines_configure(struct pblk *pblk, int flags) | |
499 | { | |
500 | struct pblk_line *line = NULL; | |
501 | int ret = 0; | |
502 | ||
503 | if (!(flags & NVM_TARGET_FACTORY)) { | |
504 | line = pblk_recov_l2p(pblk); | |
505 | if (IS_ERR(line)) { | |
506 | pr_err("pblk: could not recover l2p table\n"); | |
507 | ret = -EFAULT; | |
508 | } | |
509 | } | |
510 | ||
511 | if (!line) { | |
512 | /* Configure next line for user data */ | |
513 | line = pblk_line_get_first_data(pblk); | |
514 | if (!line) { | |
515 | pr_err("pblk: line list corrupted\n"); | |
516 | ret = -EFAULT; | |
517 | } | |
518 | } | |
519 | ||
520 | return ret; | |
521 | } | |
522 | ||
523 | /* See comment over struct line_emeta definition */ | |
dd2a4343 | 524 | static unsigned int calc_emeta_len(struct pblk *pblk) |
a4bd217b | 525 | { |
dd2a4343 JG |
526 | struct pblk_line_meta *lm = &pblk->lm; |
527 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
528 | struct nvm_tgt_dev *dev = pblk->dev; | |
529 | struct nvm_geo *geo = &dev->geo; | |
530 | ||
531 | /* Round to sector size so that lba_list starts on its own sector */ | |
532 | lm->emeta_sec[1] = DIV_ROUND_UP( | |
533 | sizeof(struct line_emeta) + lm->blk_bitmap_len, | |
534 | geo->sec_size); | |
535 | lm->emeta_len[1] = lm->emeta_sec[1] * geo->sec_size; | |
536 | ||
537 | /* Round to sector size so that vsc_list starts on its own sector */ | |
538 | lm->dsec_per_line = lm->sec_per_line - lm->emeta_sec[0]; | |
539 | lm->emeta_sec[2] = DIV_ROUND_UP(lm->dsec_per_line * sizeof(u64), | |
540 | geo->sec_size); | |
541 | lm->emeta_len[2] = lm->emeta_sec[2] * geo->sec_size; | |
542 | ||
543 | lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32), | |
544 | geo->sec_size); | |
545 | lm->emeta_len[3] = lm->emeta_sec[3] * geo->sec_size; | |
546 | ||
547 | lm->vsc_list_len = l_mg->nr_lines * sizeof(u32); | |
548 | ||
549 | return (lm->emeta_len[1] + lm->emeta_len[2] + lm->emeta_len[3]); | |
a4bd217b JG |
550 | } |
551 | ||
552 | static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) | |
553 | { | |
554 | struct nvm_tgt_dev *dev = pblk->dev; | |
555 | struct nvm_geo *geo = &dev->geo; | |
556 | sector_t provisioned; | |
557 | ||
558 | pblk->over_pct = 20; | |
559 | ||
560 | provisioned = nr_free_blks; | |
561 | provisioned *= (100 - pblk->over_pct); | |
562 | sector_div(provisioned, 100); | |
563 | ||
564 | /* Internally pblk manages all free blocks, but all calculations based | |
565 | * on user capacity consider only provisioned blocks | |
566 | */ | |
567 | pblk->rl.total_blocks = nr_free_blks; | |
568 | pblk->rl.nr_secs = nr_free_blks * geo->sec_per_blk; | |
569 | pblk->capacity = provisioned * geo->sec_per_blk; | |
570 | atomic_set(&pblk->rl.free_blocks, nr_free_blks); | |
571 | } | |
572 | ||
dd2a4343 JG |
573 | static int pblk_lines_alloc_metadata(struct pblk *pblk) |
574 | { | |
575 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
576 | struct pblk_line_meta *lm = &pblk->lm; | |
577 | int i; | |
578 | ||
579 | /* smeta is always small enough to fit on a kmalloc memory allocation, | |
580 | * emeta depends on the number of LUNs allocated to the pblk instance | |
581 | */ | |
dd2a4343 JG |
582 | for (i = 0; i < PBLK_DATA_LINES; i++) { |
583 | l_mg->sline_meta[i] = kmalloc(lm->smeta_len, GFP_KERNEL); | |
584 | if (!l_mg->sline_meta[i]) | |
585 | goto fail_free_smeta; | |
586 | } | |
587 | ||
588 | /* emeta allocates three different buffers for managing metadata with | |
589 | * in-memory and in-media layouts | |
590 | */ | |
591 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
592 | struct pblk_emeta *emeta; | |
593 | ||
594 | emeta = kmalloc(sizeof(struct pblk_emeta), GFP_KERNEL); | |
595 | if (!emeta) | |
596 | goto fail_free_emeta; | |
597 | ||
598 | if (lm->emeta_len[0] > KMALLOC_MAX_CACHE_SIZE) { | |
599 | l_mg->emeta_alloc_type = PBLK_VMALLOC_META; | |
600 | ||
601 | emeta->buf = vmalloc(lm->emeta_len[0]); | |
602 | if (!emeta->buf) { | |
603 | kfree(emeta); | |
604 | goto fail_free_emeta; | |
605 | } | |
606 | ||
607 | emeta->nr_entries = lm->emeta_sec[0]; | |
608 | l_mg->eline_meta[i] = emeta; | |
609 | } else { | |
610 | l_mg->emeta_alloc_type = PBLK_KMALLOC_META; | |
611 | ||
612 | emeta->buf = kmalloc(lm->emeta_len[0], GFP_KERNEL); | |
613 | if (!emeta->buf) { | |
614 | kfree(emeta); | |
615 | goto fail_free_emeta; | |
616 | } | |
617 | ||
618 | emeta->nr_entries = lm->emeta_sec[0]; | |
619 | l_mg->eline_meta[i] = emeta; | |
620 | } | |
621 | } | |
622 | ||
623 | l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL); | |
624 | if (!l_mg->vsc_list) | |
625 | goto fail_free_emeta; | |
626 | ||
627 | for (i = 0; i < l_mg->nr_lines; i++) | |
628 | l_mg->vsc_list[i] = cpu_to_le32(EMPTY_ENTRY); | |
629 | ||
630 | return 0; | |
631 | ||
632 | fail_free_emeta: | |
633 | while (--i >= 0) { | |
c9d84b35 RP |
634 | if (l_mg->emeta_alloc_type == PBLK_VMALLOC_META) |
635 | vfree(l_mg->eline_meta[i]->buf); | |
636 | else | |
637 | kfree(l_mg->eline_meta[i]->buf); | |
f680f19a | 638 | kfree(l_mg->eline_meta[i]); |
dd2a4343 JG |
639 | } |
640 | ||
641 | fail_free_smeta: | |
642 | for (i = 0; i < PBLK_DATA_LINES; i++) | |
f680f19a | 643 | kfree(l_mg->sline_meta[i]); |
dd2a4343 JG |
644 | |
645 | return -ENOMEM; | |
646 | } | |
647 | ||
a4bd217b JG |
648 | static int pblk_lines_init(struct pblk *pblk) |
649 | { | |
650 | struct nvm_tgt_dev *dev = pblk->dev; | |
651 | struct nvm_geo *geo = &dev->geo; | |
652 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
653 | struct pblk_line_meta *lm = &pblk->lm; | |
654 | struct pblk_line *line; | |
655 | unsigned int smeta_len, emeta_len; | |
d624f371 | 656 | long nr_bad_blks, nr_free_blks; |
dd2a4343 JG |
657 | int bb_distance, max_write_ppas, mod; |
658 | int i, ret; | |
659 | ||
660 | pblk->min_write_pgs = geo->sec_per_pl * (geo->sec_size / PAGE_SIZE); | |
661 | max_write_ppas = pblk->min_write_pgs * geo->nr_luns; | |
662 | pblk->max_write_pgs = (max_write_ppas < nvm_max_phys_sects(dev)) ? | |
663 | max_write_ppas : nvm_max_phys_sects(dev); | |
664 | pblk_set_sec_per_write(pblk, pblk->min_write_pgs); | |
665 | ||
666 | if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) { | |
667 | pr_err("pblk: cannot support device max_phys_sect\n"); | |
668 | return -EINVAL; | |
669 | } | |
670 | ||
671 | div_u64_rem(geo->sec_per_blk, pblk->min_write_pgs, &mod); | |
672 | if (mod) { | |
673 | pr_err("pblk: bad configuration of sectors/pages\n"); | |
674 | return -EINVAL; | |
675 | } | |
676 | ||
677 | l_mg->nr_lines = geo->blks_per_lun; | |
678 | l_mg->log_line = l_mg->data_line = NULL; | |
679 | l_mg->l_seq_nr = l_mg->d_seq_nr = 0; | |
680 | l_mg->nr_free_lines = 0; | |
681 | bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
a4bd217b JG |
682 | |
683 | lm->sec_per_line = geo->sec_per_blk * geo->nr_luns; | |
684 | lm->blk_per_line = geo->nr_luns; | |
685 | lm->blk_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long); | |
686 | lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long); | |
687 | lm->lun_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long); | |
688 | lm->high_thrs = lm->sec_per_line / 2; | |
689 | lm->mid_thrs = lm->sec_per_line / 4; | |
dd2a4343 | 690 | lm->meta_distance = (geo->nr_luns / 2) * pblk->min_write_pgs; |
a4bd217b JG |
691 | |
692 | /* Calculate necessary pages for smeta. See comment over struct | |
693 | * line_smeta definition | |
694 | */ | |
a4bd217b JG |
695 | i = 1; |
696 | add_smeta_page: | |
697 | lm->smeta_sec = i * geo->sec_per_pl; | |
698 | lm->smeta_len = lm->smeta_sec * geo->sec_size; | |
699 | ||
dd2a4343 | 700 | smeta_len = sizeof(struct line_smeta) + lm->lun_bitmap_len; |
a4bd217b JG |
701 | if (smeta_len > lm->smeta_len) { |
702 | i++; | |
703 | goto add_smeta_page; | |
704 | } | |
705 | ||
706 | /* Calculate necessary pages for emeta. See comment over struct | |
707 | * line_emeta definition | |
708 | */ | |
709 | i = 1; | |
710 | add_emeta_page: | |
dd2a4343 JG |
711 | lm->emeta_sec[0] = i * geo->sec_per_pl; |
712 | lm->emeta_len[0] = lm->emeta_sec[0] * geo->sec_size; | |
a4bd217b | 713 | |
dd2a4343 JG |
714 | emeta_len = calc_emeta_len(pblk); |
715 | if (emeta_len > lm->emeta_len[0]) { | |
a4bd217b JG |
716 | i++; |
717 | goto add_emeta_page; | |
718 | } | |
a4bd217b | 719 | |
dd2a4343 JG |
720 | lm->emeta_bb = geo->nr_luns - i; |
721 | lm->min_blk_line = 1 + DIV_ROUND_UP(lm->smeta_sec + lm->emeta_sec[0], | |
d624f371 | 722 | geo->sec_per_blk); |
b5e063a2 JG |
723 | if (lm->min_blk_line > lm->blk_per_line) { |
724 | pr_err("pblk: config. not supported. Min. LUN in line:%d\n", | |
725 | lm->blk_per_line); | |
726 | ret = -EINVAL; | |
727 | goto fail; | |
728 | } | |
a4bd217b | 729 | |
dd2a4343 JG |
730 | ret = pblk_lines_alloc_metadata(pblk); |
731 | if (ret) | |
732 | goto fail; | |
a4bd217b JG |
733 | |
734 | l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
1c6286f2 DC |
735 | if (!l_mg->bb_template) { |
736 | ret = -ENOMEM; | |
a4bd217b | 737 | goto fail_free_meta; |
1c6286f2 | 738 | } |
a4bd217b JG |
739 | |
740 | l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
1c6286f2 DC |
741 | if (!l_mg->bb_aux) { |
742 | ret = -ENOMEM; | |
a4bd217b | 743 | goto fail_free_bb_template; |
1c6286f2 | 744 | } |
a4bd217b JG |
745 | |
746 | bb_distance = (geo->nr_luns) * geo->sec_per_pl; | |
747 | for (i = 0; i < lm->sec_per_line; i += bb_distance) | |
748 | bitmap_set(l_mg->bb_template, i, geo->sec_per_pl); | |
749 | ||
750 | INIT_LIST_HEAD(&l_mg->free_list); | |
751 | INIT_LIST_HEAD(&l_mg->corrupt_list); | |
752 | INIT_LIST_HEAD(&l_mg->bad_list); | |
753 | INIT_LIST_HEAD(&l_mg->gc_full_list); | |
754 | INIT_LIST_HEAD(&l_mg->gc_high_list); | |
755 | INIT_LIST_HEAD(&l_mg->gc_mid_list); | |
756 | INIT_LIST_HEAD(&l_mg->gc_low_list); | |
757 | INIT_LIST_HEAD(&l_mg->gc_empty_list); | |
758 | ||
dd2a4343 JG |
759 | INIT_LIST_HEAD(&l_mg->emeta_list); |
760 | ||
a4bd217b JG |
761 | l_mg->gc_lists[0] = &l_mg->gc_high_list; |
762 | l_mg->gc_lists[1] = &l_mg->gc_mid_list; | |
763 | l_mg->gc_lists[2] = &l_mg->gc_low_list; | |
764 | ||
765 | spin_lock_init(&l_mg->free_lock); | |
dd2a4343 | 766 | spin_lock_init(&l_mg->close_lock); |
a4bd217b JG |
767 | spin_lock_init(&l_mg->gc_lock); |
768 | ||
769 | pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line), | |
770 | GFP_KERNEL); | |
1c6286f2 DC |
771 | if (!pblk->lines) { |
772 | ret = -ENOMEM; | |
a4bd217b | 773 | goto fail_free_bb_aux; |
1c6286f2 | 774 | } |
a4bd217b JG |
775 | |
776 | nr_free_blks = 0; | |
777 | for (i = 0; i < l_mg->nr_lines; i++) { | |
a44f53fa JG |
778 | int blk_in_line; |
779 | ||
a4bd217b JG |
780 | line = &pblk->lines[i]; |
781 | ||
782 | line->pblk = pblk; | |
783 | line->id = i; | |
784 | line->type = PBLK_LINETYPE_FREE; | |
785 | line->state = PBLK_LINESTATE_FREE; | |
786 | line->gc_group = PBLK_LINEGC_NONE; | |
dd2a4343 | 787 | line->vsc = &l_mg->vsc_list[i]; |
a4bd217b JG |
788 | spin_lock_init(&line->lock); |
789 | ||
dffdd960 JG |
790 | ret = pblk_alloc_line_bitmaps(pblk, line); |
791 | if (ret) | |
792 | goto fail_free_lines; | |
793 | ||
794 | nr_bad_blks = pblk_bb_line(pblk, line, lm->blk_per_line); | |
1c6286f2 | 795 | if (nr_bad_blks < 0 || nr_bad_blks > lm->blk_per_line) { |
dffdd960 | 796 | pblk_free_line_bitmaps(line); |
1c6286f2 | 797 | ret = -EINVAL; |
a4bd217b | 798 | goto fail_free_lines; |
1c6286f2 | 799 | } |
a4bd217b | 800 | |
a44f53fa JG |
801 | blk_in_line = lm->blk_per_line - nr_bad_blks; |
802 | if (blk_in_line < lm->min_blk_line) { | |
a4bd217b JG |
803 | line->state = PBLK_LINESTATE_BAD; |
804 | list_add_tail(&line->list, &l_mg->bad_list); | |
805 | continue; | |
806 | } | |
807 | ||
a44f53fa JG |
808 | nr_free_blks += blk_in_line; |
809 | atomic_set(&line->blk_in_line, blk_in_line); | |
a4bd217b JG |
810 | |
811 | l_mg->nr_free_lines++; | |
812 | list_add_tail(&line->list, &l_mg->free_list); | |
813 | } | |
814 | ||
815 | pblk_set_provision(pblk, nr_free_blks); | |
816 | ||
a4bd217b JG |
817 | /* Cleanup per-LUN bad block lists - managed within lines on run-time */ |
818 | for (i = 0; i < geo->nr_luns; i++) | |
819 | kfree(pblk->luns[i].bb_list); | |
820 | ||
821 | return 0; | |
822 | fail_free_lines: | |
dffdd960 JG |
823 | while (--i >= 0) |
824 | pblk_free_line_bitmaps(&pblk->lines[i]); | |
a4bd217b JG |
825 | fail_free_bb_aux: |
826 | kfree(l_mg->bb_aux); | |
827 | fail_free_bb_template: | |
828 | kfree(l_mg->bb_template); | |
829 | fail_free_meta: | |
dd2a4343 | 830 | pblk_line_meta_free(pblk); |
a4bd217b JG |
831 | fail: |
832 | for (i = 0; i < geo->nr_luns; i++) | |
833 | kfree(pblk->luns[i].bb_list); | |
834 | ||
835 | return ret; | |
836 | } | |
837 | ||
838 | static int pblk_writer_init(struct pblk *pblk) | |
839 | { | |
840 | setup_timer(&pblk->wtimer, pblk_write_timer_fn, (unsigned long)pblk); | |
841 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); | |
842 | ||
843 | pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t"); | |
844 | if (IS_ERR(pblk->writer_ts)) { | |
845 | pr_err("pblk: could not allocate writer kthread\n"); | |
1c6286f2 | 846 | return PTR_ERR(pblk->writer_ts); |
a4bd217b JG |
847 | } |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | static void pblk_writer_stop(struct pblk *pblk) | |
853 | { | |
ee8d5c1a JG |
854 | /* The pipeline must be stopped and the write buffer emptied before the |
855 | * write thread is stopped | |
856 | */ | |
857 | WARN(pblk_rb_read_count(&pblk->rwb), | |
858 | "Stopping not fully persisted write buffer\n"); | |
859 | ||
860 | WARN(pblk_rb_sync_count(&pblk->rwb), | |
861 | "Stopping not fully synced write buffer\n"); | |
862 | ||
a4bd217b JG |
863 | if (pblk->writer_ts) |
864 | kthread_stop(pblk->writer_ts); | |
865 | del_timer(&pblk->wtimer); | |
866 | } | |
867 | ||
868 | static void pblk_free(struct pblk *pblk) | |
869 | { | |
870 | pblk_luns_free(pblk); | |
871 | pblk_lines_free(pblk); | |
872 | pblk_line_meta_free(pblk); | |
873 | pblk_core_free(pblk); | |
874 | pblk_l2p_free(pblk); | |
875 | ||
876 | kfree(pblk); | |
877 | } | |
878 | ||
879 | static void pblk_tear_down(struct pblk *pblk) | |
880 | { | |
588726d3 | 881 | pblk_pipeline_stop(pblk); |
a4bd217b JG |
882 | pblk_writer_stop(pblk); |
883 | pblk_rb_sync_l2p(&pblk->rwb); | |
a4bd217b JG |
884 | pblk_rwb_free(pblk); |
885 | pblk_rl_free(&pblk->rl); | |
886 | ||
887 | pr_debug("pblk: consistent tear down\n"); | |
888 | } | |
889 | ||
890 | static void pblk_exit(void *private) | |
891 | { | |
892 | struct pblk *pblk = private; | |
893 | ||
894 | down_write(&pblk_lock); | |
895 | pblk_gc_exit(pblk); | |
896 | pblk_tear_down(pblk); | |
897 | pblk_free(pblk); | |
898 | up_write(&pblk_lock); | |
899 | } | |
900 | ||
901 | static sector_t pblk_capacity(void *private) | |
902 | { | |
903 | struct pblk *pblk = private; | |
904 | ||
905 | return pblk->capacity * NR_PHY_IN_LOG; | |
906 | } | |
907 | ||
908 | static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, | |
909 | int flags) | |
910 | { | |
911 | struct nvm_geo *geo = &dev->geo; | |
912 | struct request_queue *bqueue = dev->q; | |
913 | struct request_queue *tqueue = tdisk->queue; | |
914 | struct pblk *pblk; | |
915 | int ret; | |
916 | ||
917 | if (dev->identity.dom & NVM_RSP_L2P) { | |
4e76af53 | 918 | pr_err("pblk: host-side L2P table not supported. (%x)\n", |
a4bd217b JG |
919 | dev->identity.dom); |
920 | return ERR_PTR(-EINVAL); | |
921 | } | |
922 | ||
923 | pblk = kzalloc(sizeof(struct pblk), GFP_KERNEL); | |
924 | if (!pblk) | |
925 | return ERR_PTR(-ENOMEM); | |
926 | ||
927 | pblk->dev = dev; | |
928 | pblk->disk = tdisk; | |
588726d3 | 929 | pblk->state = PBLK_STATE_RUNNING; |
a4bd217b JG |
930 | |
931 | spin_lock_init(&pblk->trans_lock); | |
932 | spin_lock_init(&pblk->lock); | |
933 | ||
934 | if (flags & NVM_TARGET_FACTORY) | |
935 | pblk_setup_uuid(pblk); | |
936 | ||
937 | #ifdef CONFIG_NVM_DEBUG | |
938 | atomic_long_set(&pblk->inflight_writes, 0); | |
939 | atomic_long_set(&pblk->padded_writes, 0); | |
940 | atomic_long_set(&pblk->padded_wb, 0); | |
941 | atomic_long_set(&pblk->nr_flush, 0); | |
942 | atomic_long_set(&pblk->req_writes, 0); | |
943 | atomic_long_set(&pblk->sub_writes, 0); | |
944 | atomic_long_set(&pblk->sync_writes, 0); | |
a4bd217b | 945 | atomic_long_set(&pblk->inflight_reads, 0); |
db7ada33 | 946 | atomic_long_set(&pblk->cache_reads, 0); |
a4bd217b JG |
947 | atomic_long_set(&pblk->sync_reads, 0); |
948 | atomic_long_set(&pblk->recov_writes, 0); | |
949 | atomic_long_set(&pblk->recov_writes, 0); | |
950 | atomic_long_set(&pblk->recov_gc_writes, 0); | |
a1121176 | 951 | atomic_long_set(&pblk->recov_gc_reads, 0); |
a4bd217b JG |
952 | #endif |
953 | ||
954 | atomic_long_set(&pblk->read_failed, 0); | |
955 | atomic_long_set(&pblk->read_empty, 0); | |
956 | atomic_long_set(&pblk->read_high_ecc, 0); | |
957 | atomic_long_set(&pblk->read_failed_gc, 0); | |
958 | atomic_long_set(&pblk->write_failed, 0); | |
959 | atomic_long_set(&pblk->erase_failed, 0); | |
960 | ||
961 | ret = pblk_luns_init(pblk, dev->luns); | |
962 | if (ret) { | |
963 | pr_err("pblk: could not initialize luns\n"); | |
964 | goto fail; | |
965 | } | |
966 | ||
967 | ret = pblk_lines_init(pblk); | |
968 | if (ret) { | |
969 | pr_err("pblk: could not initialize lines\n"); | |
970 | goto fail_free_luns; | |
971 | } | |
972 | ||
973 | ret = pblk_core_init(pblk); | |
974 | if (ret) { | |
975 | pr_err("pblk: could not initialize core\n"); | |
976 | goto fail_free_line_meta; | |
977 | } | |
978 | ||
979 | ret = pblk_l2p_init(pblk); | |
980 | if (ret) { | |
981 | pr_err("pblk: could not initialize maps\n"); | |
982 | goto fail_free_core; | |
983 | } | |
984 | ||
985 | ret = pblk_lines_configure(pblk, flags); | |
986 | if (ret) { | |
987 | pr_err("pblk: could not configure lines\n"); | |
988 | goto fail_free_l2p; | |
989 | } | |
990 | ||
991 | ret = pblk_writer_init(pblk); | |
992 | if (ret) { | |
993 | pr_err("pblk: could not initialize write thread\n"); | |
994 | goto fail_free_lines; | |
995 | } | |
996 | ||
997 | ret = pblk_gc_init(pblk); | |
998 | if (ret) { | |
999 | pr_err("pblk: could not initialize gc\n"); | |
1000 | goto fail_stop_writer; | |
1001 | } | |
1002 | ||
1003 | /* inherit the size from the underlying device */ | |
1004 | blk_queue_logical_block_size(tqueue, queue_physical_block_size(bqueue)); | |
1005 | blk_queue_max_hw_sectors(tqueue, queue_max_hw_sectors(bqueue)); | |
1006 | ||
1007 | blk_queue_write_cache(tqueue, true, false); | |
1008 | ||
1009 | tqueue->limits.discard_granularity = geo->pgs_per_blk * geo->pfpg_size; | |
1010 | tqueue->limits.discard_alignment = 0; | |
1011 | blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); | |
1012 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, tqueue); | |
1013 | ||
1014 | pr_info("pblk init: luns:%u, lines:%d, secs:%llu, buf entries:%u\n", | |
1015 | geo->nr_luns, pblk->l_mg.nr_lines, | |
1016 | (unsigned long long)pblk->rl.nr_secs, | |
1017 | pblk->rwb.nr_entries); | |
1018 | ||
1019 | wake_up_process(pblk->writer_ts); | |
1020 | return pblk; | |
1021 | ||
1022 | fail_stop_writer: | |
1023 | pblk_writer_stop(pblk); | |
1024 | fail_free_lines: | |
1025 | pblk_lines_free(pblk); | |
1026 | fail_free_l2p: | |
1027 | pblk_l2p_free(pblk); | |
1028 | fail_free_core: | |
1029 | pblk_core_free(pblk); | |
1030 | fail_free_line_meta: | |
1031 | pblk_line_meta_free(pblk); | |
1032 | fail_free_luns: | |
1033 | pblk_luns_free(pblk); | |
1034 | fail: | |
1035 | kfree(pblk); | |
1036 | return ERR_PTR(ret); | |
1037 | } | |
1038 | ||
1039 | /* physical block device target */ | |
1040 | static struct nvm_tgt_type tt_pblk = { | |
1041 | .name = "pblk", | |
1042 | .version = {1, 0, 0}, | |
1043 | ||
1044 | .make_rq = pblk_make_rq, | |
1045 | .capacity = pblk_capacity, | |
1046 | ||
1047 | .init = pblk_init, | |
1048 | .exit = pblk_exit, | |
1049 | ||
1050 | .sysfs_init = pblk_sysfs_init, | |
1051 | .sysfs_exit = pblk_sysfs_exit, | |
90014829 | 1052 | .owner = THIS_MODULE, |
a4bd217b JG |
1053 | }; |
1054 | ||
1055 | static int __init pblk_module_init(void) | |
1056 | { | |
b25d5237 N |
1057 | int ret; |
1058 | ||
1059 | pblk_bio_set = bioset_create(BIO_POOL_SIZE, 0, 0); | |
1060 | if (!pblk_bio_set) | |
1061 | return -ENOMEM; | |
1062 | ret = nvm_register_tgt_type(&tt_pblk); | |
1063 | if (ret) | |
1064 | bioset_free(pblk_bio_set); | |
1065 | return ret; | |
a4bd217b JG |
1066 | } |
1067 | ||
1068 | static void pblk_module_exit(void) | |
1069 | { | |
b25d5237 | 1070 | bioset_free(pblk_bio_set); |
a4bd217b JG |
1071 | nvm_unregister_tgt_type(&tt_pblk); |
1072 | } | |
1073 | ||
1074 | module_init(pblk_module_init); | |
1075 | module_exit(pblk_module_exit); | |
1076 | MODULE_AUTHOR("Javier Gonzalez <javier@cnexlabs.com>"); | |
1077 | MODULE_AUTHOR("Matias Bjorling <matias@cnexlabs.com>"); | |
1078 | MODULE_LICENSE("GPL v2"); | |
1079 | MODULE_DESCRIPTION("Physical Block-Device for Open-Channel SSDs"); |