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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 | ||
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 | { | |
a4bd217b | 184 | down_write(&pblk_lock); |
b84ae4a8 | 185 | pblk_ws_cache = kmem_cache_create("pblk_blk_ws", |
a4bd217b | 186 | sizeof(struct pblk_line_ws), 0, 0, NULL); |
b84ae4a8 | 187 | if (!pblk_ws_cache) { |
a4bd217b JG |
188 | up_write(&pblk_lock); |
189 | return -ENOMEM; | |
190 | } | |
191 | ||
192 | pblk_rec_cache = kmem_cache_create("pblk_rec", | |
193 | sizeof(struct pblk_rec_ctx), 0, 0, NULL); | |
194 | if (!pblk_rec_cache) { | |
b84ae4a8 | 195 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
196 | up_write(&pblk_lock); |
197 | return -ENOMEM; | |
198 | } | |
199 | ||
084ec9ba | 200 | pblk_g_rq_cache = kmem_cache_create("pblk_g_rq", pblk_g_rq_size, |
a4bd217b | 201 | 0, 0, NULL); |
084ec9ba | 202 | if (!pblk_g_rq_cache) { |
b84ae4a8 | 203 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
204 | kmem_cache_destroy(pblk_rec_cache); |
205 | up_write(&pblk_lock); | |
206 | return -ENOMEM; | |
207 | } | |
208 | ||
209 | pblk_w_rq_cache = kmem_cache_create("pblk_w_rq", pblk_w_rq_size, | |
210 | 0, 0, NULL); | |
211 | if (!pblk_w_rq_cache) { | |
b84ae4a8 | 212 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b | 213 | kmem_cache_destroy(pblk_rec_cache); |
084ec9ba | 214 | kmem_cache_destroy(pblk_g_rq_cache); |
a4bd217b JG |
215 | up_write(&pblk_lock); |
216 | return -ENOMEM; | |
217 | } | |
a4bd217b JG |
218 | up_write(&pblk_lock); |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static int pblk_core_init(struct pblk *pblk) | |
224 | { | |
225 | struct nvm_tgt_dev *dev = pblk->dev; | |
226 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b | 227 | |
a4bd217b JG |
228 | pblk->pgs_in_buffer = NVM_MEM_PAGE_WRITE * geo->sec_per_pg * |
229 | geo->nr_planes * geo->nr_luns; | |
230 | ||
a4bd217b JG |
231 | if (pblk_init_global_caches(pblk)) |
232 | return -ENOMEM; | |
233 | ||
b84ae4a8 | 234 | /* Internal bios can be at most the sectors signaled by the device. */ |
bd432417 JG |
235 | pblk->page_bio_pool = mempool_create_page_pool(nvm_max_phys_sects(dev), |
236 | 0); | |
237 | if (!pblk->page_bio_pool) | |
a4bd217b JG |
238 | return -ENOMEM; |
239 | ||
b84ae4a8 JG |
240 | pblk->gen_ws_pool = mempool_create_slab_pool(PBLK_GEN_WS_POOL_SIZE, |
241 | pblk_ws_cache); | |
242 | if (!pblk->gen_ws_pool) | |
bd432417 | 243 | goto free_page_bio_pool; |
a4bd217b JG |
244 | |
245 | pblk->rec_pool = mempool_create_slab_pool(geo->nr_luns, pblk_rec_cache); | |
246 | if (!pblk->rec_pool) | |
b84ae4a8 | 247 | goto free_gen_ws_pool; |
a4bd217b | 248 | |
0d880398 | 249 | pblk->r_rq_pool = mempool_create_slab_pool(geo->nr_luns, |
ef576494 | 250 | pblk_g_rq_cache); |
0d880398 | 251 | if (!pblk->r_rq_pool) |
a4bd217b JG |
252 | goto free_rec_pool; |
253 | ||
0d880398 JG |
254 | pblk->e_rq_pool = mempool_create_slab_pool(geo->nr_luns, |
255 | pblk_g_rq_cache); | |
256 | if (!pblk->e_rq_pool) | |
257 | goto free_r_rq_pool; | |
258 | ||
259 | pblk->w_rq_pool = mempool_create_slab_pool(geo->nr_luns, | |
ef576494 | 260 | pblk_w_rq_cache); |
a4bd217b | 261 | if (!pblk->w_rq_pool) |
0d880398 | 262 | goto free_e_rq_pool; |
a4bd217b | 263 | |
ef576494 JG |
264 | pblk->close_wq = alloc_workqueue("pblk-close-wq", |
265 | WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_NR_CLOSE_JOBS); | |
266 | if (!pblk->close_wq) | |
e72ec1d3 | 267 | goto free_w_rq_pool; |
a4bd217b | 268 | |
ef576494 JG |
269 | pblk->bb_wq = alloc_workqueue("pblk-bb-wq", |
270 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
271 | if (!pblk->bb_wq) | |
272 | goto free_close_wq; | |
273 | ||
7bd4d370 JG |
274 | pblk->r_end_wq = alloc_workqueue("pblk-read-end-wq", |
275 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
276 | if (!pblk->r_end_wq) | |
ef576494 | 277 | goto free_bb_wq; |
a4bd217b | 278 | |
7bd4d370 JG |
279 | if (pblk_set_ppaf(pblk)) |
280 | goto free_r_end_wq; | |
281 | ||
a4bd217b | 282 | if (pblk_rwb_init(pblk)) |
7bd4d370 | 283 | goto free_r_end_wq; |
a4bd217b JG |
284 | |
285 | INIT_LIST_HEAD(&pblk->compl_list); | |
286 | return 0; | |
287 | ||
7bd4d370 JG |
288 | free_r_end_wq: |
289 | destroy_workqueue(pblk->r_end_wq); | |
ef576494 JG |
290 | free_bb_wq: |
291 | destroy_workqueue(pblk->bb_wq); | |
292 | free_close_wq: | |
293 | destroy_workqueue(pblk->close_wq); | |
a4bd217b JG |
294 | free_w_rq_pool: |
295 | mempool_destroy(pblk->w_rq_pool); | |
0d880398 JG |
296 | free_e_rq_pool: |
297 | mempool_destroy(pblk->e_rq_pool); | |
298 | free_r_rq_pool: | |
299 | mempool_destroy(pblk->r_rq_pool); | |
a4bd217b JG |
300 | free_rec_pool: |
301 | mempool_destroy(pblk->rec_pool); | |
b84ae4a8 JG |
302 | free_gen_ws_pool: |
303 | mempool_destroy(pblk->gen_ws_pool); | |
bd432417 JG |
304 | free_page_bio_pool: |
305 | mempool_destroy(pblk->page_bio_pool); | |
a4bd217b JG |
306 | return -ENOMEM; |
307 | } | |
308 | ||
309 | static void pblk_core_free(struct pblk *pblk) | |
310 | { | |
ef576494 JG |
311 | if (pblk->close_wq) |
312 | destroy_workqueue(pblk->close_wq); | |
313 | ||
7bd4d370 JG |
314 | if (pblk->r_end_wq) |
315 | destroy_workqueue(pblk->r_end_wq); | |
316 | ||
ef576494 JG |
317 | if (pblk->bb_wq) |
318 | destroy_workqueue(pblk->bb_wq); | |
a4bd217b | 319 | |
bd432417 | 320 | mempool_destroy(pblk->page_bio_pool); |
b84ae4a8 | 321 | mempool_destroy(pblk->gen_ws_pool); |
a4bd217b | 322 | mempool_destroy(pblk->rec_pool); |
0d880398 JG |
323 | mempool_destroy(pblk->r_rq_pool); |
324 | mempool_destroy(pblk->e_rq_pool); | |
a4bd217b | 325 | mempool_destroy(pblk->w_rq_pool); |
a4bd217b | 326 | |
b84ae4a8 | 327 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b | 328 | kmem_cache_destroy(pblk_rec_cache); |
084ec9ba | 329 | kmem_cache_destroy(pblk_g_rq_cache); |
a4bd217b | 330 | kmem_cache_destroy(pblk_w_rq_cache); |
a4bd217b JG |
331 | } |
332 | ||
333 | static void pblk_luns_free(struct pblk *pblk) | |
334 | { | |
335 | kfree(pblk->luns); | |
336 | } | |
337 | ||
dffdd960 JG |
338 | static void pblk_free_line_bitmaps(struct pblk_line *line) |
339 | { | |
340 | kfree(line->blk_bitmap); | |
341 | kfree(line->erase_bitmap); | |
342 | } | |
343 | ||
a4bd217b JG |
344 | static void pblk_lines_free(struct pblk *pblk) |
345 | { | |
346 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
347 | struct pblk_line *line; | |
348 | int i; | |
349 | ||
350 | spin_lock(&l_mg->free_lock); | |
351 | for (i = 0; i < l_mg->nr_lines; i++) { | |
352 | line = &pblk->lines[i]; | |
353 | ||
354 | pblk_line_free(pblk, line); | |
dffdd960 | 355 | pblk_free_line_bitmaps(line); |
a4bd217b JG |
356 | } |
357 | spin_unlock(&l_mg->free_lock); | |
358 | } | |
359 | ||
360 | static void pblk_line_meta_free(struct pblk *pblk) | |
361 | { | |
362 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
363 | int i; | |
364 | ||
365 | kfree(l_mg->bb_template); | |
366 | kfree(l_mg->bb_aux); | |
dd2a4343 | 367 | kfree(l_mg->vsc_list); |
a4bd217b | 368 | |
588726d3 | 369 | spin_lock(&l_mg->free_lock); |
a4bd217b | 370 | for (i = 0; i < PBLK_DATA_LINES; i++) { |
f680f19a | 371 | kfree(l_mg->sline_meta[i]); |
dd2a4343 | 372 | pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type); |
f680f19a | 373 | kfree(l_mg->eline_meta[i]); |
a4bd217b | 374 | } |
588726d3 | 375 | spin_unlock(&l_mg->free_lock); |
a4bd217b JG |
376 | |
377 | kfree(pblk->lines); | |
378 | } | |
379 | ||
380 | static int pblk_bb_discovery(struct nvm_tgt_dev *dev, struct pblk_lun *rlun) | |
381 | { | |
382 | struct nvm_geo *geo = &dev->geo; | |
383 | struct ppa_addr ppa; | |
384 | u8 *blks; | |
385 | int nr_blks, ret; | |
386 | ||
387 | nr_blks = geo->blks_per_lun * geo->plane_mode; | |
388 | blks = kmalloc(nr_blks, GFP_KERNEL); | |
389 | if (!blks) | |
390 | return -ENOMEM; | |
391 | ||
392 | ppa.ppa = 0; | |
393 | ppa.g.ch = rlun->bppa.g.ch; | |
394 | ppa.g.lun = rlun->bppa.g.lun; | |
395 | ||
396 | ret = nvm_get_tgt_bb_tbl(dev, ppa, blks); | |
397 | if (ret) | |
398 | goto out; | |
399 | ||
400 | nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks); | |
401 | if (nr_blks < 0) { | |
a4bd217b | 402 | ret = nr_blks; |
5136a4fd | 403 | goto out; |
a4bd217b JG |
404 | } |
405 | ||
406 | rlun->bb_list = blks; | |
407 | ||
5136a4fd | 408 | return 0; |
a4bd217b | 409 | out: |
5136a4fd | 410 | kfree(blks); |
a4bd217b JG |
411 | return ret; |
412 | } | |
413 | ||
dffdd960 JG |
414 | static int pblk_bb_line(struct pblk *pblk, struct pblk_line *line, |
415 | int blk_per_line) | |
a4bd217b | 416 | { |
dffdd960 JG |
417 | struct nvm_tgt_dev *dev = pblk->dev; |
418 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b JG |
419 | struct pblk_lun *rlun; |
420 | int bb_cnt = 0; | |
421 | int i; | |
422 | ||
dffdd960 JG |
423 | for (i = 0; i < blk_per_line; i++) { |
424 | rlun = &pblk->luns[i]; | |
425 | if (rlun->bb_list[line->id] == NVM_BLK_T_FREE) | |
426 | continue; | |
427 | ||
428 | set_bit(pblk_ppa_to_pos(geo, rlun->bppa), line->blk_bitmap); | |
429 | bb_cnt++; | |
430 | } | |
431 | ||
432 | return bb_cnt; | |
433 | } | |
434 | ||
435 | static int pblk_alloc_line_bitmaps(struct pblk *pblk, struct pblk_line *line) | |
436 | { | |
437 | struct pblk_line_meta *lm = &pblk->lm; | |
438 | ||
a4bd217b JG |
439 | line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); |
440 | if (!line->blk_bitmap) | |
441 | return -ENOMEM; | |
442 | ||
443 | line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); | |
444 | if (!line->erase_bitmap) { | |
445 | kfree(line->blk_bitmap); | |
446 | return -ENOMEM; | |
447 | } | |
448 | ||
dffdd960 | 449 | return 0; |
a4bd217b JG |
450 | } |
451 | ||
452 | static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns) | |
453 | { | |
454 | struct nvm_tgt_dev *dev = pblk->dev; | |
455 | struct nvm_geo *geo = &dev->geo; | |
456 | struct pblk_lun *rlun; | |
457 | int i, ret; | |
458 | ||
459 | /* TODO: Implement unbalanced LUN support */ | |
460 | if (geo->luns_per_chnl < 0) { | |
461 | pr_err("pblk: unbalanced LUN config.\n"); | |
462 | return -EINVAL; | |
463 | } | |
464 | ||
465 | pblk->luns = kcalloc(geo->nr_luns, sizeof(struct pblk_lun), GFP_KERNEL); | |
466 | if (!pblk->luns) | |
467 | return -ENOMEM; | |
468 | ||
469 | for (i = 0; i < geo->nr_luns; i++) { | |
470 | /* Stripe across channels */ | |
471 | int ch = i % geo->nr_chnls; | |
472 | int lun_raw = i / geo->nr_chnls; | |
473 | int lunid = lun_raw + ch * geo->luns_per_chnl; | |
474 | ||
475 | rlun = &pblk->luns[i]; | |
476 | rlun->bppa = luns[lunid]; | |
477 | ||
478 | sema_init(&rlun->wr_sem, 1); | |
479 | ||
480 | ret = pblk_bb_discovery(dev, rlun); | |
481 | if (ret) { | |
482 | while (--i >= 0) | |
483 | kfree(pblk->luns[i].bb_list); | |
484 | return ret; | |
485 | } | |
486 | } | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
491 | static int pblk_lines_configure(struct pblk *pblk, int flags) | |
492 | { | |
493 | struct pblk_line *line = NULL; | |
494 | int ret = 0; | |
495 | ||
496 | if (!(flags & NVM_TARGET_FACTORY)) { | |
497 | line = pblk_recov_l2p(pblk); | |
498 | if (IS_ERR(line)) { | |
499 | pr_err("pblk: could not recover l2p table\n"); | |
500 | ret = -EFAULT; | |
501 | } | |
502 | } | |
503 | ||
504 | if (!line) { | |
505 | /* Configure next line for user data */ | |
506 | line = pblk_line_get_first_data(pblk); | |
507 | if (!line) { | |
508 | pr_err("pblk: line list corrupted\n"); | |
509 | ret = -EFAULT; | |
510 | } | |
511 | } | |
512 | ||
513 | return ret; | |
514 | } | |
515 | ||
516 | /* See comment over struct line_emeta definition */ | |
dd2a4343 | 517 | static unsigned int calc_emeta_len(struct pblk *pblk) |
a4bd217b | 518 | { |
dd2a4343 JG |
519 | struct pblk_line_meta *lm = &pblk->lm; |
520 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
521 | struct nvm_tgt_dev *dev = pblk->dev; | |
522 | struct nvm_geo *geo = &dev->geo; | |
523 | ||
524 | /* Round to sector size so that lba_list starts on its own sector */ | |
525 | lm->emeta_sec[1] = DIV_ROUND_UP( | |
526 | sizeof(struct line_emeta) + lm->blk_bitmap_len, | |
527 | geo->sec_size); | |
528 | lm->emeta_len[1] = lm->emeta_sec[1] * geo->sec_size; | |
529 | ||
530 | /* Round to sector size so that vsc_list starts on its own sector */ | |
531 | lm->dsec_per_line = lm->sec_per_line - lm->emeta_sec[0]; | |
532 | lm->emeta_sec[2] = DIV_ROUND_UP(lm->dsec_per_line * sizeof(u64), | |
533 | geo->sec_size); | |
534 | lm->emeta_len[2] = lm->emeta_sec[2] * geo->sec_size; | |
535 | ||
536 | lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32), | |
537 | geo->sec_size); | |
538 | lm->emeta_len[3] = lm->emeta_sec[3] * geo->sec_size; | |
539 | ||
540 | lm->vsc_list_len = l_mg->nr_lines * sizeof(u32); | |
541 | ||
542 | return (lm->emeta_len[1] + lm->emeta_len[2] + lm->emeta_len[3]); | |
a4bd217b JG |
543 | } |
544 | ||
545 | static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) | |
546 | { | |
547 | struct nvm_tgt_dev *dev = pblk->dev; | |
548 | struct nvm_geo *geo = &dev->geo; | |
549 | sector_t provisioned; | |
550 | ||
551 | pblk->over_pct = 20; | |
552 | ||
553 | provisioned = nr_free_blks; | |
554 | provisioned *= (100 - pblk->over_pct); | |
555 | sector_div(provisioned, 100); | |
556 | ||
557 | /* Internally pblk manages all free blocks, but all calculations based | |
558 | * on user capacity consider only provisioned blocks | |
559 | */ | |
560 | pblk->rl.total_blocks = nr_free_blks; | |
561 | pblk->rl.nr_secs = nr_free_blks * geo->sec_per_blk; | |
562 | pblk->capacity = provisioned * geo->sec_per_blk; | |
563 | atomic_set(&pblk->rl.free_blocks, nr_free_blks); | |
564 | } | |
565 | ||
dd2a4343 JG |
566 | static int pblk_lines_alloc_metadata(struct pblk *pblk) |
567 | { | |
568 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
569 | struct pblk_line_meta *lm = &pblk->lm; | |
570 | int i; | |
571 | ||
572 | /* smeta is always small enough to fit on a kmalloc memory allocation, | |
573 | * emeta depends on the number of LUNs allocated to the pblk instance | |
574 | */ | |
dd2a4343 JG |
575 | for (i = 0; i < PBLK_DATA_LINES; i++) { |
576 | l_mg->sline_meta[i] = kmalloc(lm->smeta_len, GFP_KERNEL); | |
577 | if (!l_mg->sline_meta[i]) | |
578 | goto fail_free_smeta; | |
579 | } | |
580 | ||
581 | /* emeta allocates three different buffers for managing metadata with | |
582 | * in-memory and in-media layouts | |
583 | */ | |
584 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
585 | struct pblk_emeta *emeta; | |
586 | ||
587 | emeta = kmalloc(sizeof(struct pblk_emeta), GFP_KERNEL); | |
588 | if (!emeta) | |
589 | goto fail_free_emeta; | |
590 | ||
591 | if (lm->emeta_len[0] > KMALLOC_MAX_CACHE_SIZE) { | |
592 | l_mg->emeta_alloc_type = PBLK_VMALLOC_META; | |
593 | ||
594 | emeta->buf = vmalloc(lm->emeta_len[0]); | |
595 | if (!emeta->buf) { | |
596 | kfree(emeta); | |
597 | goto fail_free_emeta; | |
598 | } | |
599 | ||
600 | emeta->nr_entries = lm->emeta_sec[0]; | |
601 | l_mg->eline_meta[i] = emeta; | |
602 | } else { | |
603 | l_mg->emeta_alloc_type = PBLK_KMALLOC_META; | |
604 | ||
605 | emeta->buf = kmalloc(lm->emeta_len[0], GFP_KERNEL); | |
606 | if (!emeta->buf) { | |
607 | kfree(emeta); | |
608 | goto fail_free_emeta; | |
609 | } | |
610 | ||
611 | emeta->nr_entries = lm->emeta_sec[0]; | |
612 | l_mg->eline_meta[i] = emeta; | |
613 | } | |
614 | } | |
615 | ||
616 | l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL); | |
617 | if (!l_mg->vsc_list) | |
618 | goto fail_free_emeta; | |
619 | ||
620 | for (i = 0; i < l_mg->nr_lines; i++) | |
621 | l_mg->vsc_list[i] = cpu_to_le32(EMPTY_ENTRY); | |
622 | ||
623 | return 0; | |
624 | ||
625 | fail_free_emeta: | |
626 | while (--i >= 0) { | |
c9d84b35 RP |
627 | if (l_mg->emeta_alloc_type == PBLK_VMALLOC_META) |
628 | vfree(l_mg->eline_meta[i]->buf); | |
629 | else | |
630 | kfree(l_mg->eline_meta[i]->buf); | |
f680f19a | 631 | kfree(l_mg->eline_meta[i]); |
dd2a4343 JG |
632 | } |
633 | ||
634 | fail_free_smeta: | |
635 | for (i = 0; i < PBLK_DATA_LINES; i++) | |
f680f19a | 636 | kfree(l_mg->sline_meta[i]); |
dd2a4343 JG |
637 | |
638 | return -ENOMEM; | |
639 | } | |
640 | ||
a4bd217b JG |
641 | static int pblk_lines_init(struct pblk *pblk) |
642 | { | |
643 | struct nvm_tgt_dev *dev = pblk->dev; | |
644 | struct nvm_geo *geo = &dev->geo; | |
645 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
646 | struct pblk_line_meta *lm = &pblk->lm; | |
647 | struct pblk_line *line; | |
648 | unsigned int smeta_len, emeta_len; | |
d624f371 | 649 | long nr_bad_blks, nr_free_blks; |
dd2a4343 JG |
650 | int bb_distance, max_write_ppas, mod; |
651 | int i, ret; | |
652 | ||
653 | pblk->min_write_pgs = geo->sec_per_pl * (geo->sec_size / PAGE_SIZE); | |
654 | max_write_ppas = pblk->min_write_pgs * geo->nr_luns; | |
655 | pblk->max_write_pgs = (max_write_ppas < nvm_max_phys_sects(dev)) ? | |
656 | max_write_ppas : nvm_max_phys_sects(dev); | |
657 | pblk_set_sec_per_write(pblk, pblk->min_write_pgs); | |
658 | ||
659 | if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) { | |
660 | pr_err("pblk: cannot support device max_phys_sect\n"); | |
661 | return -EINVAL; | |
662 | } | |
663 | ||
664 | div_u64_rem(geo->sec_per_blk, pblk->min_write_pgs, &mod); | |
665 | if (mod) { | |
666 | pr_err("pblk: bad configuration of sectors/pages\n"); | |
667 | return -EINVAL; | |
668 | } | |
669 | ||
670 | l_mg->nr_lines = geo->blks_per_lun; | |
671 | l_mg->log_line = l_mg->data_line = NULL; | |
672 | l_mg->l_seq_nr = l_mg->d_seq_nr = 0; | |
673 | l_mg->nr_free_lines = 0; | |
674 | bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
a4bd217b JG |
675 | |
676 | lm->sec_per_line = geo->sec_per_blk * geo->nr_luns; | |
677 | lm->blk_per_line = geo->nr_luns; | |
678 | lm->blk_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long); | |
679 | lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long); | |
680 | lm->lun_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long); | |
27b97872 RP |
681 | lm->mid_thrs = lm->sec_per_line / 2; |
682 | lm->high_thrs = lm->sec_per_line / 4; | |
dd2a4343 | 683 | lm->meta_distance = (geo->nr_luns / 2) * pblk->min_write_pgs; |
a4bd217b JG |
684 | |
685 | /* Calculate necessary pages for smeta. See comment over struct | |
686 | * line_smeta definition | |
687 | */ | |
a4bd217b JG |
688 | i = 1; |
689 | add_smeta_page: | |
690 | lm->smeta_sec = i * geo->sec_per_pl; | |
691 | lm->smeta_len = lm->smeta_sec * geo->sec_size; | |
692 | ||
dd2a4343 | 693 | smeta_len = sizeof(struct line_smeta) + lm->lun_bitmap_len; |
a4bd217b JG |
694 | if (smeta_len > lm->smeta_len) { |
695 | i++; | |
696 | goto add_smeta_page; | |
697 | } | |
698 | ||
699 | /* Calculate necessary pages for emeta. See comment over struct | |
700 | * line_emeta definition | |
701 | */ | |
702 | i = 1; | |
703 | add_emeta_page: | |
dd2a4343 JG |
704 | lm->emeta_sec[0] = i * geo->sec_per_pl; |
705 | lm->emeta_len[0] = lm->emeta_sec[0] * geo->sec_size; | |
a4bd217b | 706 | |
dd2a4343 JG |
707 | emeta_len = calc_emeta_len(pblk); |
708 | if (emeta_len > lm->emeta_len[0]) { | |
a4bd217b JG |
709 | i++; |
710 | goto add_emeta_page; | |
711 | } | |
a4bd217b | 712 | |
e6b754c2 | 713 | lm->emeta_bb = geo->nr_luns > i ? geo->nr_luns - i : 0; |
21d22871 JG |
714 | |
715 | lm->min_blk_line = 1; | |
716 | if (geo->nr_luns > 1) | |
717 | lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec + | |
718 | lm->emeta_sec[0], geo->sec_per_blk); | |
719 | ||
b5e063a2 JG |
720 | if (lm->min_blk_line > lm->blk_per_line) { |
721 | pr_err("pblk: config. not supported. Min. LUN in line:%d\n", | |
722 | lm->blk_per_line); | |
723 | ret = -EINVAL; | |
724 | goto fail; | |
725 | } | |
a4bd217b | 726 | |
dd2a4343 JG |
727 | ret = pblk_lines_alloc_metadata(pblk); |
728 | if (ret) | |
729 | goto fail; | |
a4bd217b JG |
730 | |
731 | l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
1c6286f2 DC |
732 | if (!l_mg->bb_template) { |
733 | ret = -ENOMEM; | |
a4bd217b | 734 | goto fail_free_meta; |
1c6286f2 | 735 | } |
a4bd217b JG |
736 | |
737 | l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
1c6286f2 DC |
738 | if (!l_mg->bb_aux) { |
739 | ret = -ENOMEM; | |
a4bd217b | 740 | goto fail_free_bb_template; |
1c6286f2 | 741 | } |
a4bd217b JG |
742 | |
743 | bb_distance = (geo->nr_luns) * geo->sec_per_pl; | |
744 | for (i = 0; i < lm->sec_per_line; i += bb_distance) | |
745 | bitmap_set(l_mg->bb_template, i, geo->sec_per_pl); | |
746 | ||
747 | INIT_LIST_HEAD(&l_mg->free_list); | |
748 | INIT_LIST_HEAD(&l_mg->corrupt_list); | |
749 | INIT_LIST_HEAD(&l_mg->bad_list); | |
750 | INIT_LIST_HEAD(&l_mg->gc_full_list); | |
751 | INIT_LIST_HEAD(&l_mg->gc_high_list); | |
752 | INIT_LIST_HEAD(&l_mg->gc_mid_list); | |
753 | INIT_LIST_HEAD(&l_mg->gc_low_list); | |
754 | INIT_LIST_HEAD(&l_mg->gc_empty_list); | |
755 | ||
dd2a4343 JG |
756 | INIT_LIST_HEAD(&l_mg->emeta_list); |
757 | ||
a4bd217b JG |
758 | l_mg->gc_lists[0] = &l_mg->gc_high_list; |
759 | l_mg->gc_lists[1] = &l_mg->gc_mid_list; | |
760 | l_mg->gc_lists[2] = &l_mg->gc_low_list; | |
761 | ||
762 | spin_lock_init(&l_mg->free_lock); | |
dd2a4343 | 763 | spin_lock_init(&l_mg->close_lock); |
a4bd217b JG |
764 | spin_lock_init(&l_mg->gc_lock); |
765 | ||
766 | pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line), | |
767 | GFP_KERNEL); | |
1c6286f2 DC |
768 | if (!pblk->lines) { |
769 | ret = -ENOMEM; | |
a4bd217b | 770 | goto fail_free_bb_aux; |
1c6286f2 | 771 | } |
a4bd217b JG |
772 | |
773 | nr_free_blks = 0; | |
774 | for (i = 0; i < l_mg->nr_lines; i++) { | |
a44f53fa JG |
775 | int blk_in_line; |
776 | ||
a4bd217b JG |
777 | line = &pblk->lines[i]; |
778 | ||
779 | line->pblk = pblk; | |
780 | line->id = i; | |
781 | line->type = PBLK_LINETYPE_FREE; | |
782 | line->state = PBLK_LINESTATE_FREE; | |
783 | line->gc_group = PBLK_LINEGC_NONE; | |
dd2a4343 | 784 | line->vsc = &l_mg->vsc_list[i]; |
a4bd217b JG |
785 | spin_lock_init(&line->lock); |
786 | ||
dffdd960 JG |
787 | ret = pblk_alloc_line_bitmaps(pblk, line); |
788 | if (ret) | |
789 | goto fail_free_lines; | |
790 | ||
791 | nr_bad_blks = pblk_bb_line(pblk, line, lm->blk_per_line); | |
1c6286f2 | 792 | if (nr_bad_blks < 0 || nr_bad_blks > lm->blk_per_line) { |
dffdd960 | 793 | pblk_free_line_bitmaps(line); |
1c6286f2 | 794 | ret = -EINVAL; |
a4bd217b | 795 | goto fail_free_lines; |
1c6286f2 | 796 | } |
a4bd217b | 797 | |
a44f53fa JG |
798 | blk_in_line = lm->blk_per_line - nr_bad_blks; |
799 | if (blk_in_line < lm->min_blk_line) { | |
a4bd217b JG |
800 | line->state = PBLK_LINESTATE_BAD; |
801 | list_add_tail(&line->list, &l_mg->bad_list); | |
802 | continue; | |
803 | } | |
804 | ||
a44f53fa JG |
805 | nr_free_blks += blk_in_line; |
806 | atomic_set(&line->blk_in_line, blk_in_line); | |
a4bd217b JG |
807 | |
808 | l_mg->nr_free_lines++; | |
809 | list_add_tail(&line->list, &l_mg->free_list); | |
810 | } | |
811 | ||
812 | pblk_set_provision(pblk, nr_free_blks); | |
813 | ||
a4bd217b JG |
814 | /* Cleanup per-LUN bad block lists - managed within lines on run-time */ |
815 | for (i = 0; i < geo->nr_luns; i++) | |
816 | kfree(pblk->luns[i].bb_list); | |
817 | ||
818 | return 0; | |
819 | fail_free_lines: | |
dffdd960 JG |
820 | while (--i >= 0) |
821 | pblk_free_line_bitmaps(&pblk->lines[i]); | |
a4bd217b JG |
822 | fail_free_bb_aux: |
823 | kfree(l_mg->bb_aux); | |
824 | fail_free_bb_template: | |
825 | kfree(l_mg->bb_template); | |
826 | fail_free_meta: | |
dd2a4343 | 827 | pblk_line_meta_free(pblk); |
a4bd217b JG |
828 | fail: |
829 | for (i = 0; i < geo->nr_luns; i++) | |
830 | kfree(pblk->luns[i].bb_list); | |
831 | ||
832 | return ret; | |
833 | } | |
834 | ||
835 | static int pblk_writer_init(struct pblk *pblk) | |
836 | { | |
837 | setup_timer(&pblk->wtimer, pblk_write_timer_fn, (unsigned long)pblk); | |
838 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); | |
839 | ||
840 | pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t"); | |
841 | if (IS_ERR(pblk->writer_ts)) { | |
842 | pr_err("pblk: could not allocate writer kthread\n"); | |
1c6286f2 | 843 | return PTR_ERR(pblk->writer_ts); |
a4bd217b JG |
844 | } |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
849 | static void pblk_writer_stop(struct pblk *pblk) | |
850 | { | |
ee8d5c1a JG |
851 | /* The pipeline must be stopped and the write buffer emptied before the |
852 | * write thread is stopped | |
853 | */ | |
854 | WARN(pblk_rb_read_count(&pblk->rwb), | |
855 | "Stopping not fully persisted write buffer\n"); | |
856 | ||
857 | WARN(pblk_rb_sync_count(&pblk->rwb), | |
858 | "Stopping not fully synced write buffer\n"); | |
859 | ||
a4bd217b JG |
860 | if (pblk->writer_ts) |
861 | kthread_stop(pblk->writer_ts); | |
862 | del_timer(&pblk->wtimer); | |
863 | } | |
864 | ||
865 | static void pblk_free(struct pblk *pblk) | |
866 | { | |
867 | pblk_luns_free(pblk); | |
868 | pblk_lines_free(pblk); | |
869 | pblk_line_meta_free(pblk); | |
870 | pblk_core_free(pblk); | |
871 | pblk_l2p_free(pblk); | |
872 | ||
873 | kfree(pblk); | |
874 | } | |
875 | ||
876 | static void pblk_tear_down(struct pblk *pblk) | |
877 | { | |
588726d3 | 878 | pblk_pipeline_stop(pblk); |
a4bd217b JG |
879 | pblk_writer_stop(pblk); |
880 | pblk_rb_sync_l2p(&pblk->rwb); | |
a4bd217b JG |
881 | pblk_rwb_free(pblk); |
882 | pblk_rl_free(&pblk->rl); | |
883 | ||
884 | pr_debug("pblk: consistent tear down\n"); | |
885 | } | |
886 | ||
887 | static void pblk_exit(void *private) | |
888 | { | |
889 | struct pblk *pblk = private; | |
890 | ||
891 | down_write(&pblk_lock); | |
892 | pblk_gc_exit(pblk); | |
893 | pblk_tear_down(pblk); | |
894 | pblk_free(pblk); | |
895 | up_write(&pblk_lock); | |
896 | } | |
897 | ||
898 | static sector_t pblk_capacity(void *private) | |
899 | { | |
900 | struct pblk *pblk = private; | |
901 | ||
902 | return pblk->capacity * NR_PHY_IN_LOG; | |
903 | } | |
904 | ||
905 | static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, | |
906 | int flags) | |
907 | { | |
908 | struct nvm_geo *geo = &dev->geo; | |
909 | struct request_queue *bqueue = dev->q; | |
910 | struct request_queue *tqueue = tdisk->queue; | |
911 | struct pblk *pblk; | |
912 | int ret; | |
913 | ||
914 | if (dev->identity.dom & NVM_RSP_L2P) { | |
4e76af53 | 915 | pr_err("pblk: host-side L2P table not supported. (%x)\n", |
a4bd217b JG |
916 | dev->identity.dom); |
917 | return ERR_PTR(-EINVAL); | |
918 | } | |
919 | ||
920 | pblk = kzalloc(sizeof(struct pblk), GFP_KERNEL); | |
921 | if (!pblk) | |
922 | return ERR_PTR(-ENOMEM); | |
923 | ||
924 | pblk->dev = dev; | |
925 | pblk->disk = tdisk; | |
588726d3 | 926 | pblk->state = PBLK_STATE_RUNNING; |
a4bd217b JG |
927 | |
928 | spin_lock_init(&pblk->trans_lock); | |
929 | spin_lock_init(&pblk->lock); | |
930 | ||
931 | if (flags & NVM_TARGET_FACTORY) | |
932 | pblk_setup_uuid(pblk); | |
933 | ||
934 | #ifdef CONFIG_NVM_DEBUG | |
935 | atomic_long_set(&pblk->inflight_writes, 0); | |
936 | atomic_long_set(&pblk->padded_writes, 0); | |
937 | atomic_long_set(&pblk->padded_wb, 0); | |
938 | atomic_long_set(&pblk->nr_flush, 0); | |
939 | atomic_long_set(&pblk->req_writes, 0); | |
940 | atomic_long_set(&pblk->sub_writes, 0); | |
941 | atomic_long_set(&pblk->sync_writes, 0); | |
a4bd217b | 942 | atomic_long_set(&pblk->inflight_reads, 0); |
db7ada33 | 943 | atomic_long_set(&pblk->cache_reads, 0); |
a4bd217b JG |
944 | atomic_long_set(&pblk->sync_reads, 0); |
945 | atomic_long_set(&pblk->recov_writes, 0); | |
946 | atomic_long_set(&pblk->recov_writes, 0); | |
947 | atomic_long_set(&pblk->recov_gc_writes, 0); | |
a1121176 | 948 | atomic_long_set(&pblk->recov_gc_reads, 0); |
a4bd217b JG |
949 | #endif |
950 | ||
951 | atomic_long_set(&pblk->read_failed, 0); | |
952 | atomic_long_set(&pblk->read_empty, 0); | |
953 | atomic_long_set(&pblk->read_high_ecc, 0); | |
954 | atomic_long_set(&pblk->read_failed_gc, 0); | |
955 | atomic_long_set(&pblk->write_failed, 0); | |
956 | atomic_long_set(&pblk->erase_failed, 0); | |
957 | ||
958 | ret = pblk_luns_init(pblk, dev->luns); | |
959 | if (ret) { | |
960 | pr_err("pblk: could not initialize luns\n"); | |
961 | goto fail; | |
962 | } | |
963 | ||
964 | ret = pblk_lines_init(pblk); | |
965 | if (ret) { | |
966 | pr_err("pblk: could not initialize lines\n"); | |
967 | goto fail_free_luns; | |
968 | } | |
969 | ||
970 | ret = pblk_core_init(pblk); | |
971 | if (ret) { | |
972 | pr_err("pblk: could not initialize core\n"); | |
973 | goto fail_free_line_meta; | |
974 | } | |
975 | ||
976 | ret = pblk_l2p_init(pblk); | |
977 | if (ret) { | |
978 | pr_err("pblk: could not initialize maps\n"); | |
979 | goto fail_free_core; | |
980 | } | |
981 | ||
982 | ret = pblk_lines_configure(pblk, flags); | |
983 | if (ret) { | |
984 | pr_err("pblk: could not configure lines\n"); | |
985 | goto fail_free_l2p; | |
986 | } | |
987 | ||
988 | ret = pblk_writer_init(pblk); | |
989 | if (ret) { | |
990 | pr_err("pblk: could not initialize write thread\n"); | |
991 | goto fail_free_lines; | |
992 | } | |
993 | ||
994 | ret = pblk_gc_init(pblk); | |
995 | if (ret) { | |
996 | pr_err("pblk: could not initialize gc\n"); | |
997 | goto fail_stop_writer; | |
998 | } | |
999 | ||
1000 | /* inherit the size from the underlying device */ | |
1001 | blk_queue_logical_block_size(tqueue, queue_physical_block_size(bqueue)); | |
1002 | blk_queue_max_hw_sectors(tqueue, queue_max_hw_sectors(bqueue)); | |
1003 | ||
1004 | blk_queue_write_cache(tqueue, true, false); | |
1005 | ||
1006 | tqueue->limits.discard_granularity = geo->pgs_per_blk * geo->pfpg_size; | |
1007 | tqueue->limits.discard_alignment = 0; | |
1008 | blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); | |
1009 | queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, tqueue); | |
1010 | ||
1011 | pr_info("pblk init: luns:%u, lines:%d, secs:%llu, buf entries:%u\n", | |
1012 | geo->nr_luns, pblk->l_mg.nr_lines, | |
1013 | (unsigned long long)pblk->rl.nr_secs, | |
1014 | pblk->rwb.nr_entries); | |
1015 | ||
1016 | wake_up_process(pblk->writer_ts); | |
1017 | return pblk; | |
1018 | ||
1019 | fail_stop_writer: | |
1020 | pblk_writer_stop(pblk); | |
1021 | fail_free_lines: | |
1022 | pblk_lines_free(pblk); | |
1023 | fail_free_l2p: | |
1024 | pblk_l2p_free(pblk); | |
1025 | fail_free_core: | |
1026 | pblk_core_free(pblk); | |
1027 | fail_free_line_meta: | |
1028 | pblk_line_meta_free(pblk); | |
1029 | fail_free_luns: | |
1030 | pblk_luns_free(pblk); | |
1031 | fail: | |
1032 | kfree(pblk); | |
1033 | return ERR_PTR(ret); | |
1034 | } | |
1035 | ||
1036 | /* physical block device target */ | |
1037 | static struct nvm_tgt_type tt_pblk = { | |
1038 | .name = "pblk", | |
1039 | .version = {1, 0, 0}, | |
1040 | ||
1041 | .make_rq = pblk_make_rq, | |
1042 | .capacity = pblk_capacity, | |
1043 | ||
1044 | .init = pblk_init, | |
1045 | .exit = pblk_exit, | |
1046 | ||
1047 | .sysfs_init = pblk_sysfs_init, | |
1048 | .sysfs_exit = pblk_sysfs_exit, | |
90014829 | 1049 | .owner = THIS_MODULE, |
a4bd217b JG |
1050 | }; |
1051 | ||
1052 | static int __init pblk_module_init(void) | |
1053 | { | |
b25d5237 N |
1054 | int ret; |
1055 | ||
1056 | pblk_bio_set = bioset_create(BIO_POOL_SIZE, 0, 0); | |
1057 | if (!pblk_bio_set) | |
1058 | return -ENOMEM; | |
1059 | ret = nvm_register_tgt_type(&tt_pblk); | |
1060 | if (ret) | |
1061 | bioset_free(pblk_bio_set); | |
1062 | return ret; | |
a4bd217b JG |
1063 | } |
1064 | ||
1065 | static void pblk_module_exit(void) | |
1066 | { | |
b25d5237 | 1067 | bioset_free(pblk_bio_set); |
a4bd217b JG |
1068 | nvm_unregister_tgt_type(&tt_pblk); |
1069 | } | |
1070 | ||
1071 | module_init(pblk_module_init); | |
1072 | module_exit(pblk_module_exit); | |
1073 | MODULE_AUTHOR("Javier Gonzalez <javier@cnexlabs.com>"); | |
1074 | MODULE_AUTHOR("Matias Bjorling <matias@cnexlabs.com>"); | |
1075 | MODULE_LICENSE("GPL v2"); | |
1076 | MODULE_DESCRIPTION("Physical Block-Device for Open-Channel SSDs"); |