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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 | ||
106 | static int pblk_l2p_init(struct pblk *pblk) | |
107 | { | |
108 | sector_t i; | |
109 | struct ppa_addr ppa; | |
c5586192 | 110 | size_t map_size; |
a4bd217b | 111 | |
c5586192 HH |
112 | map_size = pblk_trans_map_size(pblk); |
113 | pblk->trans_map = vmalloc(map_size); | |
a4bd217b JG |
114 | if (!pblk->trans_map) |
115 | return -ENOMEM; | |
116 | ||
117 | pblk_ppa_set_empty(&ppa); | |
118 | ||
119 | for (i = 0; i < pblk->rl.nr_secs; i++) | |
120 | pblk_trans_map_set(pblk, i, ppa); | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | static void pblk_rwb_free(struct pblk *pblk) | |
126 | { | |
127 | if (pblk_rb_tear_down_check(&pblk->rwb)) | |
128 | pr_err("pblk: write buffer error on tear down\n"); | |
129 | ||
130 | pblk_rb_data_free(&pblk->rwb); | |
131 | vfree(pblk_rb_entries_ref(&pblk->rwb)); | |
132 | } | |
133 | ||
134 | static int pblk_rwb_init(struct pblk *pblk) | |
135 | { | |
136 | struct nvm_tgt_dev *dev = pblk->dev; | |
137 | struct nvm_geo *geo = &dev->geo; | |
138 | struct pblk_rb_entry *entries; | |
139 | unsigned long nr_entries; | |
140 | unsigned int power_size, power_seg_sz; | |
141 | ||
142 | nr_entries = pblk_rb_calculate_size(pblk->pgs_in_buffer); | |
143 | ||
144 | entries = vzalloc(nr_entries * sizeof(struct pblk_rb_entry)); | |
145 | if (!entries) | |
146 | return -ENOMEM; | |
147 | ||
148 | power_size = get_count_order(nr_entries); | |
149 | power_seg_sz = get_count_order(geo->sec_size); | |
150 | ||
151 | return pblk_rb_init(&pblk->rwb, entries, power_size, power_seg_sz); | |
152 | } | |
153 | ||
154 | /* Minimum pages needed within a lun */ | |
a4bd217b JG |
155 | #define ADDR_POOL_SIZE 64 |
156 | ||
157 | static int pblk_set_ppaf(struct pblk *pblk) | |
158 | { | |
159 | struct nvm_tgt_dev *dev = pblk->dev; | |
160 | struct nvm_geo *geo = &dev->geo; | |
161 | struct nvm_addr_format ppaf = geo->ppaf; | |
162 | int power_len; | |
163 | ||
164 | /* Re-calculate channel and lun format to adapt to configuration */ | |
165 | power_len = get_count_order(geo->nr_chnls); | |
166 | if (1 << power_len != geo->nr_chnls) { | |
167 | pr_err("pblk: supports only power-of-two channel config.\n"); | |
168 | return -EINVAL; | |
169 | } | |
170 | ppaf.ch_len = power_len; | |
171 | ||
fae7fae4 MB |
172 | power_len = get_count_order(geo->nr_luns); |
173 | if (1 << power_len != geo->nr_luns) { | |
a4bd217b JG |
174 | pr_err("pblk: supports only power-of-two LUN config.\n"); |
175 | return -EINVAL; | |
176 | } | |
177 | ppaf.lun_len = power_len; | |
178 | ||
179 | pblk->ppaf.sec_offset = 0; | |
180 | pblk->ppaf.pln_offset = ppaf.sect_len; | |
181 | pblk->ppaf.ch_offset = pblk->ppaf.pln_offset + ppaf.pln_len; | |
182 | pblk->ppaf.lun_offset = pblk->ppaf.ch_offset + ppaf.ch_len; | |
183 | pblk->ppaf.pg_offset = pblk->ppaf.lun_offset + ppaf.lun_len; | |
184 | pblk->ppaf.blk_offset = pblk->ppaf.pg_offset + ppaf.pg_len; | |
185 | pblk->ppaf.sec_mask = (1ULL << ppaf.sect_len) - 1; | |
186 | pblk->ppaf.pln_mask = ((1ULL << ppaf.pln_len) - 1) << | |
187 | pblk->ppaf.pln_offset; | |
188 | pblk->ppaf.ch_mask = ((1ULL << ppaf.ch_len) - 1) << | |
189 | pblk->ppaf.ch_offset; | |
190 | pblk->ppaf.lun_mask = ((1ULL << ppaf.lun_len) - 1) << | |
191 | pblk->ppaf.lun_offset; | |
192 | pblk->ppaf.pg_mask = ((1ULL << ppaf.pg_len) - 1) << | |
193 | pblk->ppaf.pg_offset; | |
194 | pblk->ppaf.blk_mask = ((1ULL << ppaf.blk_len) - 1) << | |
195 | pblk->ppaf.blk_offset; | |
196 | ||
197 | pblk->ppaf_bitsize = pblk->ppaf.blk_offset + ppaf.blk_len; | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | static int pblk_init_global_caches(struct pblk *pblk) | |
203 | { | |
a4bd217b | 204 | down_write(&pblk_lock); |
b84ae4a8 | 205 | pblk_ws_cache = kmem_cache_create("pblk_blk_ws", |
a4bd217b | 206 | sizeof(struct pblk_line_ws), 0, 0, NULL); |
b84ae4a8 | 207 | if (!pblk_ws_cache) { |
a4bd217b JG |
208 | up_write(&pblk_lock); |
209 | return -ENOMEM; | |
210 | } | |
211 | ||
212 | pblk_rec_cache = kmem_cache_create("pblk_rec", | |
213 | sizeof(struct pblk_rec_ctx), 0, 0, NULL); | |
214 | if (!pblk_rec_cache) { | |
b84ae4a8 | 215 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
216 | up_write(&pblk_lock); |
217 | return -ENOMEM; | |
218 | } | |
219 | ||
084ec9ba | 220 | pblk_g_rq_cache = kmem_cache_create("pblk_g_rq", pblk_g_rq_size, |
a4bd217b | 221 | 0, 0, NULL); |
084ec9ba | 222 | if (!pblk_g_rq_cache) { |
b84ae4a8 | 223 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b JG |
224 | kmem_cache_destroy(pblk_rec_cache); |
225 | up_write(&pblk_lock); | |
226 | return -ENOMEM; | |
227 | } | |
228 | ||
229 | pblk_w_rq_cache = kmem_cache_create("pblk_w_rq", pblk_w_rq_size, | |
230 | 0, 0, NULL); | |
231 | if (!pblk_w_rq_cache) { | |
b84ae4a8 | 232 | kmem_cache_destroy(pblk_ws_cache); |
a4bd217b | 233 | kmem_cache_destroy(pblk_rec_cache); |
084ec9ba | 234 | kmem_cache_destroy(pblk_g_rq_cache); |
a4bd217b JG |
235 | up_write(&pblk_lock); |
236 | return -ENOMEM; | |
237 | } | |
a4bd217b JG |
238 | up_write(&pblk_lock); |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
22a4e061 RP |
243 | static void pblk_free_global_caches(struct pblk *pblk) |
244 | { | |
245 | kmem_cache_destroy(pblk_ws_cache); | |
246 | kmem_cache_destroy(pblk_rec_cache); | |
247 | kmem_cache_destroy(pblk_g_rq_cache); | |
248 | kmem_cache_destroy(pblk_w_rq_cache); | |
249 | } | |
250 | ||
a4bd217b JG |
251 | static int pblk_core_init(struct pblk *pblk) |
252 | { | |
253 | struct nvm_tgt_dev *dev = pblk->dev; | |
254 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b | 255 | |
a4bd217b | 256 | pblk->pgs_in_buffer = NVM_MEM_PAGE_WRITE * geo->sec_per_pg * |
fae7fae4 | 257 | geo->nr_planes * geo->all_luns; |
a4bd217b | 258 | |
a4bd217b JG |
259 | if (pblk_init_global_caches(pblk)) |
260 | return -ENOMEM; | |
261 | ||
b84ae4a8 | 262 | /* Internal bios can be at most the sectors signaled by the device. */ |
bd432417 JG |
263 | pblk->page_bio_pool = mempool_create_page_pool(nvm_max_phys_sects(dev), |
264 | 0); | |
265 | if (!pblk->page_bio_pool) | |
22a4e061 | 266 | goto free_global_caches; |
a4bd217b | 267 | |
b84ae4a8 JG |
268 | pblk->gen_ws_pool = mempool_create_slab_pool(PBLK_GEN_WS_POOL_SIZE, |
269 | pblk_ws_cache); | |
270 | if (!pblk->gen_ws_pool) | |
bd432417 | 271 | goto free_page_bio_pool; |
a4bd217b | 272 | |
fae7fae4 MB |
273 | pblk->rec_pool = mempool_create_slab_pool(geo->all_luns, |
274 | pblk_rec_cache); | |
a4bd217b | 275 | if (!pblk->rec_pool) |
b84ae4a8 | 276 | goto free_gen_ws_pool; |
a4bd217b | 277 | |
fae7fae4 | 278 | pblk->r_rq_pool = mempool_create_slab_pool(geo->all_luns, |
ef576494 | 279 | pblk_g_rq_cache); |
0d880398 | 280 | if (!pblk->r_rq_pool) |
a4bd217b JG |
281 | goto free_rec_pool; |
282 | ||
fae7fae4 | 283 | pblk->e_rq_pool = mempool_create_slab_pool(geo->all_luns, |
0d880398 JG |
284 | pblk_g_rq_cache); |
285 | if (!pblk->e_rq_pool) | |
286 | goto free_r_rq_pool; | |
287 | ||
fae7fae4 | 288 | pblk->w_rq_pool = mempool_create_slab_pool(geo->all_luns, |
ef576494 | 289 | pblk_w_rq_cache); |
a4bd217b | 290 | if (!pblk->w_rq_pool) |
0d880398 | 291 | goto free_e_rq_pool; |
a4bd217b | 292 | |
ef576494 JG |
293 | pblk->close_wq = alloc_workqueue("pblk-close-wq", |
294 | WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_NR_CLOSE_JOBS); | |
295 | if (!pblk->close_wq) | |
e72ec1d3 | 296 | goto free_w_rq_pool; |
a4bd217b | 297 | |
ef576494 JG |
298 | pblk->bb_wq = alloc_workqueue("pblk-bb-wq", |
299 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
300 | if (!pblk->bb_wq) | |
301 | goto free_close_wq; | |
302 | ||
7bd4d370 JG |
303 | pblk->r_end_wq = alloc_workqueue("pblk-read-end-wq", |
304 | WQ_MEM_RECLAIM | WQ_UNBOUND, 0); | |
305 | if (!pblk->r_end_wq) | |
ef576494 | 306 | goto free_bb_wq; |
a4bd217b | 307 | |
7bd4d370 JG |
308 | if (pblk_set_ppaf(pblk)) |
309 | goto free_r_end_wq; | |
310 | ||
a4bd217b | 311 | if (pblk_rwb_init(pblk)) |
7bd4d370 | 312 | goto free_r_end_wq; |
a4bd217b JG |
313 | |
314 | INIT_LIST_HEAD(&pblk->compl_list); | |
315 | return 0; | |
316 | ||
7bd4d370 JG |
317 | free_r_end_wq: |
318 | destroy_workqueue(pblk->r_end_wq); | |
ef576494 JG |
319 | free_bb_wq: |
320 | destroy_workqueue(pblk->bb_wq); | |
321 | free_close_wq: | |
322 | destroy_workqueue(pblk->close_wq); | |
a4bd217b JG |
323 | free_w_rq_pool: |
324 | mempool_destroy(pblk->w_rq_pool); | |
0d880398 JG |
325 | free_e_rq_pool: |
326 | mempool_destroy(pblk->e_rq_pool); | |
327 | free_r_rq_pool: | |
328 | mempool_destroy(pblk->r_rq_pool); | |
a4bd217b JG |
329 | free_rec_pool: |
330 | mempool_destroy(pblk->rec_pool); | |
b84ae4a8 JG |
331 | free_gen_ws_pool: |
332 | mempool_destroy(pblk->gen_ws_pool); | |
bd432417 JG |
333 | free_page_bio_pool: |
334 | mempool_destroy(pblk->page_bio_pool); | |
22a4e061 RP |
335 | free_global_caches: |
336 | pblk_free_global_caches(pblk); | |
a4bd217b JG |
337 | return -ENOMEM; |
338 | } | |
339 | ||
340 | static void pblk_core_free(struct pblk *pblk) | |
341 | { | |
ef576494 JG |
342 | if (pblk->close_wq) |
343 | destroy_workqueue(pblk->close_wq); | |
344 | ||
7bd4d370 JG |
345 | if (pblk->r_end_wq) |
346 | destroy_workqueue(pblk->r_end_wq); | |
347 | ||
ef576494 JG |
348 | if (pblk->bb_wq) |
349 | destroy_workqueue(pblk->bb_wq); | |
a4bd217b | 350 | |
bd432417 | 351 | mempool_destroy(pblk->page_bio_pool); |
b84ae4a8 | 352 | mempool_destroy(pblk->gen_ws_pool); |
a4bd217b | 353 | mempool_destroy(pblk->rec_pool); |
0d880398 JG |
354 | mempool_destroy(pblk->r_rq_pool); |
355 | mempool_destroy(pblk->e_rq_pool); | |
a4bd217b | 356 | mempool_destroy(pblk->w_rq_pool); |
a4bd217b | 357 | |
c6847e4e JG |
358 | pblk_rwb_free(pblk); |
359 | ||
22a4e061 | 360 | pblk_free_global_caches(pblk); |
a4bd217b JG |
361 | } |
362 | ||
363 | static void pblk_luns_free(struct pblk *pblk) | |
364 | { | |
365 | kfree(pblk->luns); | |
366 | } | |
367 | ||
dffdd960 JG |
368 | static void pblk_free_line_bitmaps(struct pblk_line *line) |
369 | { | |
370 | kfree(line->blk_bitmap); | |
371 | kfree(line->erase_bitmap); | |
372 | } | |
373 | ||
a4bd217b JG |
374 | static void pblk_lines_free(struct pblk *pblk) |
375 | { | |
376 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
377 | struct pblk_line *line; | |
378 | int i; | |
379 | ||
380 | spin_lock(&l_mg->free_lock); | |
381 | for (i = 0; i < l_mg->nr_lines; i++) { | |
382 | line = &pblk->lines[i]; | |
383 | ||
384 | pblk_line_free(pblk, line); | |
dffdd960 | 385 | pblk_free_line_bitmaps(line); |
a4bd217b JG |
386 | } |
387 | spin_unlock(&l_mg->free_lock); | |
388 | } | |
389 | ||
390 | static void pblk_line_meta_free(struct pblk *pblk) | |
391 | { | |
392 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
393 | int i; | |
394 | ||
395 | kfree(l_mg->bb_template); | |
396 | kfree(l_mg->bb_aux); | |
dd2a4343 | 397 | kfree(l_mg->vsc_list); |
a4bd217b JG |
398 | |
399 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
f680f19a | 400 | kfree(l_mg->sline_meta[i]); |
dd2a4343 | 401 | pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type); |
f680f19a | 402 | kfree(l_mg->eline_meta[i]); |
a4bd217b JG |
403 | } |
404 | ||
405 | kfree(pblk->lines); | |
406 | } | |
407 | ||
408 | static int pblk_bb_discovery(struct nvm_tgt_dev *dev, struct pblk_lun *rlun) | |
409 | { | |
410 | struct nvm_geo *geo = &dev->geo; | |
411 | struct ppa_addr ppa; | |
412 | u8 *blks; | |
413 | int nr_blks, ret; | |
414 | ||
fae7fae4 | 415 | nr_blks = geo->nr_chks * geo->plane_mode; |
a4bd217b JG |
416 | blks = kmalloc(nr_blks, GFP_KERNEL); |
417 | if (!blks) | |
418 | return -ENOMEM; | |
419 | ||
420 | ppa.ppa = 0; | |
421 | ppa.g.ch = rlun->bppa.g.ch; | |
422 | ppa.g.lun = rlun->bppa.g.lun; | |
423 | ||
424 | ret = nvm_get_tgt_bb_tbl(dev, ppa, blks); | |
425 | if (ret) | |
426 | goto out; | |
427 | ||
428 | nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks); | |
429 | if (nr_blks < 0) { | |
a4bd217b | 430 | ret = nr_blks; |
5136a4fd | 431 | goto out; |
a4bd217b JG |
432 | } |
433 | ||
434 | rlun->bb_list = blks; | |
435 | ||
5136a4fd | 436 | return 0; |
a4bd217b | 437 | out: |
5136a4fd | 438 | kfree(blks); |
a4bd217b JG |
439 | return ret; |
440 | } | |
441 | ||
dffdd960 JG |
442 | static int pblk_bb_line(struct pblk *pblk, struct pblk_line *line, |
443 | int blk_per_line) | |
a4bd217b | 444 | { |
dffdd960 JG |
445 | struct nvm_tgt_dev *dev = pblk->dev; |
446 | struct nvm_geo *geo = &dev->geo; | |
a4bd217b JG |
447 | struct pblk_lun *rlun; |
448 | int bb_cnt = 0; | |
449 | int i; | |
450 | ||
dffdd960 JG |
451 | for (i = 0; i < blk_per_line; i++) { |
452 | rlun = &pblk->luns[i]; | |
453 | if (rlun->bb_list[line->id] == NVM_BLK_T_FREE) | |
454 | continue; | |
455 | ||
456 | set_bit(pblk_ppa_to_pos(geo, rlun->bppa), line->blk_bitmap); | |
457 | bb_cnt++; | |
458 | } | |
459 | ||
460 | return bb_cnt; | |
461 | } | |
462 | ||
463 | static int pblk_alloc_line_bitmaps(struct pblk *pblk, struct pblk_line *line) | |
464 | { | |
465 | struct pblk_line_meta *lm = &pblk->lm; | |
466 | ||
a4bd217b JG |
467 | line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); |
468 | if (!line->blk_bitmap) | |
469 | return -ENOMEM; | |
470 | ||
471 | line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL); | |
472 | if (!line->erase_bitmap) { | |
473 | kfree(line->blk_bitmap); | |
474 | return -ENOMEM; | |
475 | } | |
476 | ||
dffdd960 | 477 | return 0; |
a4bd217b JG |
478 | } |
479 | ||
480 | static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns) | |
481 | { | |
482 | struct nvm_tgt_dev *dev = pblk->dev; | |
483 | struct nvm_geo *geo = &dev->geo; | |
484 | struct pblk_lun *rlun; | |
485 | int i, ret; | |
486 | ||
487 | /* TODO: Implement unbalanced LUN support */ | |
fae7fae4 | 488 | if (geo->nr_luns < 0) { |
a4bd217b JG |
489 | pr_err("pblk: unbalanced LUN config.\n"); |
490 | return -EINVAL; | |
491 | } | |
492 | ||
fae7fae4 MB |
493 | pblk->luns = kcalloc(geo->all_luns, sizeof(struct pblk_lun), |
494 | GFP_KERNEL); | |
a4bd217b JG |
495 | if (!pblk->luns) |
496 | return -ENOMEM; | |
497 | ||
fae7fae4 | 498 | for (i = 0; i < geo->all_luns; i++) { |
a4bd217b JG |
499 | /* Stripe across channels */ |
500 | int ch = i % geo->nr_chnls; | |
501 | int lun_raw = i / geo->nr_chnls; | |
fae7fae4 | 502 | int lunid = lun_raw + ch * geo->nr_luns; |
a4bd217b JG |
503 | |
504 | rlun = &pblk->luns[i]; | |
505 | rlun->bppa = luns[lunid]; | |
506 | ||
507 | sema_init(&rlun->wr_sem, 1); | |
508 | ||
509 | ret = pblk_bb_discovery(dev, rlun); | |
510 | if (ret) { | |
511 | while (--i >= 0) | |
512 | kfree(pblk->luns[i].bb_list); | |
513 | return ret; | |
514 | } | |
515 | } | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | static int pblk_lines_configure(struct pblk *pblk, int flags) | |
521 | { | |
522 | struct pblk_line *line = NULL; | |
523 | int ret = 0; | |
524 | ||
525 | if (!(flags & NVM_TARGET_FACTORY)) { | |
526 | line = pblk_recov_l2p(pblk); | |
527 | if (IS_ERR(line)) { | |
528 | pr_err("pblk: could not recover l2p table\n"); | |
529 | ret = -EFAULT; | |
530 | } | |
531 | } | |
532 | ||
c5586192 HH |
533 | #ifdef CONFIG_NVM_DEBUG |
534 | pr_info("pblk init: L2P CRC: %x\n", pblk_l2p_crc(pblk)); | |
535 | #endif | |
536 | ||
37ce33d5 HH |
537 | /* Free full lines directly as GC has not been started yet */ |
538 | pblk_gc_free_full_lines(pblk); | |
539 | ||
a4bd217b JG |
540 | if (!line) { |
541 | /* Configure next line for user data */ | |
542 | line = pblk_line_get_first_data(pblk); | |
543 | if (!line) { | |
544 | pr_err("pblk: line list corrupted\n"); | |
545 | ret = -EFAULT; | |
546 | } | |
547 | } | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
552 | /* See comment over struct line_emeta definition */ | |
dd2a4343 | 553 | static unsigned int calc_emeta_len(struct pblk *pblk) |
a4bd217b | 554 | { |
dd2a4343 JG |
555 | struct pblk_line_meta *lm = &pblk->lm; |
556 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
557 | struct nvm_tgt_dev *dev = pblk->dev; | |
558 | struct nvm_geo *geo = &dev->geo; | |
559 | ||
560 | /* Round to sector size so that lba_list starts on its own sector */ | |
561 | lm->emeta_sec[1] = DIV_ROUND_UP( | |
76758390 HH |
562 | sizeof(struct line_emeta) + lm->blk_bitmap_len + |
563 | sizeof(struct wa_counters), geo->sec_size); | |
dd2a4343 JG |
564 | lm->emeta_len[1] = lm->emeta_sec[1] * geo->sec_size; |
565 | ||
566 | /* Round to sector size so that vsc_list starts on its own sector */ | |
567 | lm->dsec_per_line = lm->sec_per_line - lm->emeta_sec[0]; | |
568 | lm->emeta_sec[2] = DIV_ROUND_UP(lm->dsec_per_line * sizeof(u64), | |
569 | geo->sec_size); | |
570 | lm->emeta_len[2] = lm->emeta_sec[2] * geo->sec_size; | |
571 | ||
572 | lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32), | |
573 | geo->sec_size); | |
574 | lm->emeta_len[3] = lm->emeta_sec[3] * geo->sec_size; | |
575 | ||
576 | lm->vsc_list_len = l_mg->nr_lines * sizeof(u32); | |
577 | ||
578 | return (lm->emeta_len[1] + lm->emeta_len[2] + lm->emeta_len[3]); | |
a4bd217b JG |
579 | } |
580 | ||
581 | static void pblk_set_provision(struct pblk *pblk, long nr_free_blks) | |
582 | { | |
583 | struct nvm_tgt_dev *dev = pblk->dev; | |
a7689938 JG |
584 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; |
585 | struct pblk_line_meta *lm = &pblk->lm; | |
a4bd217b JG |
586 | struct nvm_geo *geo = &dev->geo; |
587 | sector_t provisioned; | |
a7689938 | 588 | int sec_meta, blk_meta; |
a4bd217b | 589 | |
e5392739 JG |
590 | if (geo->op == NVM_TARGET_DEFAULT_OP) |
591 | pblk->op = PBLK_DEFAULT_OP; | |
592 | else | |
593 | pblk->op = geo->op; | |
a4bd217b JG |
594 | |
595 | provisioned = nr_free_blks; | |
a7689938 | 596 | provisioned *= (100 - pblk->op); |
a4bd217b JG |
597 | sector_div(provisioned, 100); |
598 | ||
a7689938 JG |
599 | pblk->op_blks = nr_free_blks - provisioned; |
600 | ||
a4bd217b JG |
601 | /* Internally pblk manages all free blocks, but all calculations based |
602 | * on user capacity consider only provisioned blocks | |
603 | */ | |
604 | pblk->rl.total_blocks = nr_free_blks; | |
fae7fae4 | 605 | pblk->rl.nr_secs = nr_free_blks * geo->sec_per_chk; |
a7689938 JG |
606 | |
607 | /* Consider sectors used for metadata */ | |
608 | sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines; | |
609 | blk_meta = DIV_ROUND_UP(sec_meta, geo->sec_per_chk); | |
610 | ||
611 | pblk->capacity = (provisioned - blk_meta) * geo->sec_per_chk; | |
612 | ||
a4bd217b | 613 | atomic_set(&pblk->rl.free_blocks, nr_free_blks); |
a7689938 | 614 | atomic_set(&pblk->rl.free_user_blocks, nr_free_blks); |
a4bd217b JG |
615 | } |
616 | ||
dd2a4343 JG |
617 | static int pblk_lines_alloc_metadata(struct pblk *pblk) |
618 | { | |
619 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
620 | struct pblk_line_meta *lm = &pblk->lm; | |
621 | int i; | |
622 | ||
623 | /* smeta is always small enough to fit on a kmalloc memory allocation, | |
624 | * emeta depends on the number of LUNs allocated to the pblk instance | |
625 | */ | |
dd2a4343 JG |
626 | for (i = 0; i < PBLK_DATA_LINES; i++) { |
627 | l_mg->sline_meta[i] = kmalloc(lm->smeta_len, GFP_KERNEL); | |
628 | if (!l_mg->sline_meta[i]) | |
629 | goto fail_free_smeta; | |
630 | } | |
631 | ||
632 | /* emeta allocates three different buffers for managing metadata with | |
633 | * in-memory and in-media layouts | |
634 | */ | |
635 | for (i = 0; i < PBLK_DATA_LINES; i++) { | |
636 | struct pblk_emeta *emeta; | |
637 | ||
638 | emeta = kmalloc(sizeof(struct pblk_emeta), GFP_KERNEL); | |
639 | if (!emeta) | |
640 | goto fail_free_emeta; | |
641 | ||
642 | if (lm->emeta_len[0] > KMALLOC_MAX_CACHE_SIZE) { | |
643 | l_mg->emeta_alloc_type = PBLK_VMALLOC_META; | |
644 | ||
645 | emeta->buf = vmalloc(lm->emeta_len[0]); | |
646 | if (!emeta->buf) { | |
647 | kfree(emeta); | |
648 | goto fail_free_emeta; | |
649 | } | |
650 | ||
651 | emeta->nr_entries = lm->emeta_sec[0]; | |
652 | l_mg->eline_meta[i] = emeta; | |
653 | } else { | |
654 | l_mg->emeta_alloc_type = PBLK_KMALLOC_META; | |
655 | ||
656 | emeta->buf = kmalloc(lm->emeta_len[0], GFP_KERNEL); | |
657 | if (!emeta->buf) { | |
658 | kfree(emeta); | |
659 | goto fail_free_emeta; | |
660 | } | |
661 | ||
662 | emeta->nr_entries = lm->emeta_sec[0]; | |
663 | l_mg->eline_meta[i] = emeta; | |
664 | } | |
665 | } | |
666 | ||
667 | l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL); | |
668 | if (!l_mg->vsc_list) | |
669 | goto fail_free_emeta; | |
670 | ||
671 | for (i = 0; i < l_mg->nr_lines; i++) | |
672 | l_mg->vsc_list[i] = cpu_to_le32(EMPTY_ENTRY); | |
673 | ||
674 | return 0; | |
675 | ||
676 | fail_free_emeta: | |
677 | while (--i >= 0) { | |
c9d84b35 RP |
678 | if (l_mg->emeta_alloc_type == PBLK_VMALLOC_META) |
679 | vfree(l_mg->eline_meta[i]->buf); | |
680 | else | |
681 | kfree(l_mg->eline_meta[i]->buf); | |
f680f19a | 682 | kfree(l_mg->eline_meta[i]); |
dd2a4343 JG |
683 | } |
684 | ||
685 | fail_free_smeta: | |
686 | for (i = 0; i < PBLK_DATA_LINES; i++) | |
f680f19a | 687 | kfree(l_mg->sline_meta[i]); |
dd2a4343 JG |
688 | |
689 | return -ENOMEM; | |
690 | } | |
691 | ||
a4bd217b JG |
692 | static int pblk_lines_init(struct pblk *pblk) |
693 | { | |
694 | struct nvm_tgt_dev *dev = pblk->dev; | |
695 | struct nvm_geo *geo = &dev->geo; | |
696 | struct pblk_line_mgmt *l_mg = &pblk->l_mg; | |
697 | struct pblk_line_meta *lm = &pblk->lm; | |
698 | struct pblk_line *line; | |
699 | unsigned int smeta_len, emeta_len; | |
d624f371 | 700 | long nr_bad_blks, nr_free_blks; |
dd2a4343 JG |
701 | int bb_distance, max_write_ppas, mod; |
702 | int i, ret; | |
703 | ||
704 | pblk->min_write_pgs = geo->sec_per_pl * (geo->sec_size / PAGE_SIZE); | |
fae7fae4 | 705 | max_write_ppas = pblk->min_write_pgs * geo->all_luns; |
dd2a4343 JG |
706 | pblk->max_write_pgs = (max_write_ppas < nvm_max_phys_sects(dev)) ? |
707 | max_write_ppas : nvm_max_phys_sects(dev); | |
708 | pblk_set_sec_per_write(pblk, pblk->min_write_pgs); | |
709 | ||
710 | if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) { | |
711 | pr_err("pblk: cannot support device max_phys_sect\n"); | |
712 | return -EINVAL; | |
713 | } | |
714 | ||
fae7fae4 | 715 | div_u64_rem(geo->sec_per_chk, pblk->min_write_pgs, &mod); |
dd2a4343 JG |
716 | if (mod) { |
717 | pr_err("pblk: bad configuration of sectors/pages\n"); | |
718 | return -EINVAL; | |
719 | } | |
720 | ||
fae7fae4 | 721 | l_mg->nr_lines = geo->nr_chks; |
dd2a4343 JG |
722 | l_mg->log_line = l_mg->data_line = NULL; |
723 | l_mg->l_seq_nr = l_mg->d_seq_nr = 0; | |
724 | l_mg->nr_free_lines = 0; | |
725 | bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES); | |
a4bd217b | 726 | |
fae7fae4 MB |
727 | lm->sec_per_line = geo->sec_per_chk * geo->all_luns; |
728 | lm->blk_per_line = geo->all_luns; | |
729 | lm->blk_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); | |
a4bd217b | 730 | lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long); |
fae7fae4 | 731 | lm->lun_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long); |
27b97872 RP |
732 | lm->mid_thrs = lm->sec_per_line / 2; |
733 | lm->high_thrs = lm->sec_per_line / 4; | |
fae7fae4 | 734 | lm->meta_distance = (geo->all_luns / 2) * pblk->min_write_pgs; |
a4bd217b JG |
735 | |
736 | /* Calculate necessary pages for smeta. See comment over struct | |
737 | * line_smeta definition | |
738 | */ | |
a4bd217b JG |
739 | i = 1; |
740 | add_smeta_page: | |
741 | lm->smeta_sec = i * geo->sec_per_pl; | |
742 | lm->smeta_len = lm->smeta_sec * geo->sec_size; | |
743 | ||
dd2a4343 | 744 | smeta_len = sizeof(struct line_smeta) + lm->lun_bitmap_len; |
a4bd217b JG |
745 | if (smeta_len > lm->smeta_len) { |
746 | i++; | |
747 | goto add_smeta_page; | |
748 | } | |
749 | ||
750 | /* Calculate necessary pages for emeta. See comment over struct | |
751 | * line_emeta definition | |
752 | */ | |
753 | i = 1; | |
754 | add_emeta_page: | |
dd2a4343 JG |
755 | lm->emeta_sec[0] = i * geo->sec_per_pl; |
756 | lm->emeta_len[0] = lm->emeta_sec[0] * geo->sec_size; | |
a4bd217b | 757 | |
dd2a4343 JG |
758 | emeta_len = calc_emeta_len(pblk); |
759 | if (emeta_len > lm->emeta_len[0]) { | |
a4bd217b JG |
760 | i++; |
761 | goto add_emeta_page; | |
762 | } | |
a4bd217b | 763 | |
fae7fae4 | 764 | lm->emeta_bb = geo->all_luns > i ? geo->all_luns - i : 0; |
21d22871 JG |
765 | |
766 | lm->min_blk_line = 1; | |
fae7fae4 | 767 | if (geo->all_luns > 1) |
21d22871 | 768 | lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec + |
fae7fae4 | 769 | lm->emeta_sec[0], geo->sec_per_chk); |
21d22871 | 770 | |
b5e063a2 JG |
771 | if (lm->min_blk_line > lm->blk_per_line) { |
772 | pr_err("pblk: config. not supported. Min. LUN in line:%d\n", | |
773 | lm->blk_per_line); | |
774 | ret = -EINVAL; | |
775 | goto fail; | |
776 | } | |
a4bd217b | 777 | |
dd2a4343 JG |
778 | ret = pblk_lines_alloc_metadata(pblk); |
779 | if (ret) | |
780 | goto fail; | |
a4bd217b JG |
781 | |
782 | l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
1c6286f2 DC |
783 | if (!l_mg->bb_template) { |
784 | ret = -ENOMEM; | |
a4bd217b | 785 | goto fail_free_meta; |
1c6286f2 | 786 | } |
a4bd217b JG |
787 | |
788 | l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL); | |
1c6286f2 DC |
789 | if (!l_mg->bb_aux) { |
790 | ret = -ENOMEM; | |
a4bd217b | 791 | goto fail_free_bb_template; |
1c6286f2 | 792 | } |
a4bd217b | 793 | |
fae7fae4 | 794 | bb_distance = (geo->all_luns) * geo->sec_per_pl; |
a4bd217b JG |
795 | for (i = 0; i < lm->sec_per_line; i += bb_distance) |
796 | bitmap_set(l_mg->bb_template, i, geo->sec_per_pl); | |
797 | ||
798 | INIT_LIST_HEAD(&l_mg->free_list); | |
799 | INIT_LIST_HEAD(&l_mg->corrupt_list); | |
800 | INIT_LIST_HEAD(&l_mg->bad_list); | |
801 | INIT_LIST_HEAD(&l_mg->gc_full_list); | |
802 | INIT_LIST_HEAD(&l_mg->gc_high_list); | |
803 | INIT_LIST_HEAD(&l_mg->gc_mid_list); | |
804 | INIT_LIST_HEAD(&l_mg->gc_low_list); | |
805 | INIT_LIST_HEAD(&l_mg->gc_empty_list); | |
806 | ||
dd2a4343 JG |
807 | INIT_LIST_HEAD(&l_mg->emeta_list); |
808 | ||
a4bd217b JG |
809 | l_mg->gc_lists[0] = &l_mg->gc_high_list; |
810 | l_mg->gc_lists[1] = &l_mg->gc_mid_list; | |
811 | l_mg->gc_lists[2] = &l_mg->gc_low_list; | |
812 | ||
813 | spin_lock_init(&l_mg->free_lock); | |
dd2a4343 | 814 | spin_lock_init(&l_mg->close_lock); |
a4bd217b JG |
815 | spin_lock_init(&l_mg->gc_lock); |
816 | ||
817 | pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line), | |
818 | GFP_KERNEL); | |
1c6286f2 DC |
819 | if (!pblk->lines) { |
820 | ret = -ENOMEM; | |
a4bd217b | 821 | goto fail_free_bb_aux; |
1c6286f2 | 822 | } |
a4bd217b JG |
823 | |
824 | nr_free_blks = 0; | |
825 | for (i = 0; i < l_mg->nr_lines; i++) { | |
a44f53fa JG |
826 | int blk_in_line; |
827 | ||
a4bd217b JG |
828 | line = &pblk->lines[i]; |
829 | ||
830 | line->pblk = pblk; | |
831 | line->id = i; | |
832 | line->type = PBLK_LINETYPE_FREE; | |
833 | line->state = PBLK_LINESTATE_FREE; | |
834 | line->gc_group = PBLK_LINEGC_NONE; | |
dd2a4343 | 835 | line->vsc = &l_mg->vsc_list[i]; |
a4bd217b JG |
836 | spin_lock_init(&line->lock); |
837 | ||
dffdd960 JG |
838 | ret = pblk_alloc_line_bitmaps(pblk, line); |
839 | if (ret) | |
840 | goto fail_free_lines; | |
841 | ||
842 | nr_bad_blks = pblk_bb_line(pblk, line, lm->blk_per_line); | |
1c6286f2 | 843 | if (nr_bad_blks < 0 || nr_bad_blks > lm->blk_per_line) { |
dffdd960 | 844 | pblk_free_line_bitmaps(line); |
1c6286f2 | 845 | ret = -EINVAL; |
a4bd217b | 846 | goto fail_free_lines; |
1c6286f2 | 847 | } |
a4bd217b | 848 | |
a44f53fa JG |
849 | blk_in_line = lm->blk_per_line - nr_bad_blks; |
850 | if (blk_in_line < lm->min_blk_line) { | |
a4bd217b JG |
851 | line->state = PBLK_LINESTATE_BAD; |
852 | list_add_tail(&line->list, &l_mg->bad_list); | |
853 | continue; | |
854 | } | |
855 | ||
a44f53fa JG |
856 | nr_free_blks += blk_in_line; |
857 | atomic_set(&line->blk_in_line, blk_in_line); | |
a4bd217b JG |
858 | |
859 | l_mg->nr_free_lines++; | |
860 | list_add_tail(&line->list, &l_mg->free_list); | |
861 | } | |
862 | ||
863 | pblk_set_provision(pblk, nr_free_blks); | |
864 | ||
a4bd217b | 865 | /* Cleanup per-LUN bad block lists - managed within lines on run-time */ |
fae7fae4 | 866 | for (i = 0; i < geo->all_luns; i++) |
a4bd217b JG |
867 | kfree(pblk->luns[i].bb_list); |
868 | ||
869 | return 0; | |
870 | fail_free_lines: | |
dffdd960 JG |
871 | while (--i >= 0) |
872 | pblk_free_line_bitmaps(&pblk->lines[i]); | |
a4bd217b JG |
873 | fail_free_bb_aux: |
874 | kfree(l_mg->bb_aux); | |
875 | fail_free_bb_template: | |
876 | kfree(l_mg->bb_template); | |
877 | fail_free_meta: | |
dd2a4343 | 878 | pblk_line_meta_free(pblk); |
a4bd217b | 879 | fail: |
fae7fae4 | 880 | for (i = 0; i < geo->all_luns; i++) |
a4bd217b JG |
881 | kfree(pblk->luns[i].bb_list); |
882 | ||
883 | return ret; | |
884 | } | |
885 | ||
886 | static int pblk_writer_init(struct pblk *pblk) | |
887 | { | |
a4bd217b JG |
888 | pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t"); |
889 | if (IS_ERR(pblk->writer_ts)) { | |
cc4f5ba1 JG |
890 | int err = PTR_ERR(pblk->writer_ts); |
891 | ||
892 | if (err != -EINTR) | |
893 | pr_err("pblk: could not allocate writer kthread (%d)\n", | |
894 | err); | |
895 | return err; | |
a4bd217b JG |
896 | } |
897 | ||
cc4f5ba1 JG |
898 | timer_setup(&pblk->wtimer, pblk_write_timer_fn, 0); |
899 | mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100)); | |
900 | ||
a4bd217b JG |
901 | return 0; |
902 | } | |
903 | ||
904 | static void pblk_writer_stop(struct pblk *pblk) | |
905 | { | |
ee8d5c1a JG |
906 | /* The pipeline must be stopped and the write buffer emptied before the |
907 | * write thread is stopped | |
908 | */ | |
909 | WARN(pblk_rb_read_count(&pblk->rwb), | |
910 | "Stopping not fully persisted write buffer\n"); | |
911 | ||
912 | WARN(pblk_rb_sync_count(&pblk->rwb), | |
913 | "Stopping not fully synced write buffer\n"); | |
914 | ||
7be970b2 | 915 | del_timer_sync(&pblk->wtimer); |
a4bd217b JG |
916 | if (pblk->writer_ts) |
917 | kthread_stop(pblk->writer_ts); | |
a4bd217b JG |
918 | } |
919 | ||
920 | static void pblk_free(struct pblk *pblk) | |
921 | { | |
922 | pblk_luns_free(pblk); | |
923 | pblk_lines_free(pblk); | |
5d149bfa | 924 | kfree(pblk->pad_dist); |
a4bd217b JG |
925 | pblk_line_meta_free(pblk); |
926 | pblk_core_free(pblk); | |
927 | pblk_l2p_free(pblk); | |
928 | ||
929 | kfree(pblk); | |
930 | } | |
931 | ||
932 | static void pblk_tear_down(struct pblk *pblk) | |
933 | { | |
588726d3 | 934 | pblk_pipeline_stop(pblk); |
a4bd217b JG |
935 | pblk_writer_stop(pblk); |
936 | pblk_rb_sync_l2p(&pblk->rwb); | |
a4bd217b JG |
937 | pblk_rl_free(&pblk->rl); |
938 | ||
939 | pr_debug("pblk: consistent tear down\n"); | |
940 | } | |
941 | ||
942 | static void pblk_exit(void *private) | |
943 | { | |
944 | struct pblk *pblk = private; | |
945 | ||
946 | down_write(&pblk_lock); | |
947 | pblk_gc_exit(pblk); | |
948 | pblk_tear_down(pblk); | |
c5586192 HH |
949 | |
950 | #ifdef CONFIG_NVM_DEBUG | |
951 | pr_info("pblk exit: L2P CRC: %x\n", pblk_l2p_crc(pblk)); | |
952 | #endif | |
953 | ||
a4bd217b JG |
954 | pblk_free(pblk); |
955 | up_write(&pblk_lock); | |
956 | } | |
957 | ||
958 | static sector_t pblk_capacity(void *private) | |
959 | { | |
960 | struct pblk *pblk = private; | |
961 | ||
962 | return pblk->capacity * NR_PHY_IN_LOG; | |
963 | } | |
964 | ||
965 | static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk, | |
966 | int flags) | |
967 | { | |
968 | struct nvm_geo *geo = &dev->geo; | |
969 | struct request_queue *bqueue = dev->q; | |
970 | struct request_queue *tqueue = tdisk->queue; | |
971 | struct pblk *pblk; | |
972 | int ret; | |
973 | ||
974 | if (dev->identity.dom & NVM_RSP_L2P) { | |
4e76af53 | 975 | pr_err("pblk: host-side L2P table not supported. (%x)\n", |
a4bd217b JG |
976 | dev->identity.dom); |
977 | return ERR_PTR(-EINVAL); | |
978 | } | |
979 | ||
980 | pblk = kzalloc(sizeof(struct pblk), GFP_KERNEL); | |
981 | if (!pblk) | |
982 | return ERR_PTR(-ENOMEM); | |
983 | ||
984 | pblk->dev = dev; | |
985 | pblk->disk = tdisk; | |
588726d3 | 986 | pblk->state = PBLK_STATE_RUNNING; |
3e3a5b8e | 987 | pblk->gc.gc_enabled = 0; |
a4bd217b JG |
988 | |
989 | spin_lock_init(&pblk->trans_lock); | |
990 | spin_lock_init(&pblk->lock); | |
991 | ||
992 | if (flags & NVM_TARGET_FACTORY) | |
993 | pblk_setup_uuid(pblk); | |
994 | ||
76758390 HH |
995 | atomic64_set(&pblk->user_wa, 0); |
996 | atomic64_set(&pblk->pad_wa, 0); | |
997 | atomic64_set(&pblk->gc_wa, 0); | |
998 | pblk->user_rst_wa = 0; | |
999 | pblk->pad_rst_wa = 0; | |
1000 | pblk->gc_rst_wa = 0; | |
1001 | ||
5d149bfa HH |
1002 | atomic64_set(&pblk->nr_flush, 0); |
1003 | pblk->nr_flush_rst = 0; | |
1004 | ||
a4bd217b JG |
1005 | #ifdef CONFIG_NVM_DEBUG |
1006 | atomic_long_set(&pblk->inflight_writes, 0); | |
1007 | atomic_long_set(&pblk->padded_writes, 0); | |
1008 | atomic_long_set(&pblk->padded_wb, 0); | |
a4bd217b JG |
1009 | atomic_long_set(&pblk->req_writes, 0); |
1010 | atomic_long_set(&pblk->sub_writes, 0); | |
1011 | atomic_long_set(&pblk->sync_writes, 0); | |
a4bd217b | 1012 | atomic_long_set(&pblk->inflight_reads, 0); |
db7ada33 | 1013 | atomic_long_set(&pblk->cache_reads, 0); |
a4bd217b JG |
1014 | atomic_long_set(&pblk->sync_reads, 0); |
1015 | atomic_long_set(&pblk->recov_writes, 0); | |
1016 | atomic_long_set(&pblk->recov_writes, 0); | |
1017 | atomic_long_set(&pblk->recov_gc_writes, 0); | |
a1121176 | 1018 | atomic_long_set(&pblk->recov_gc_reads, 0); |
a4bd217b JG |
1019 | #endif |
1020 | ||
1021 | atomic_long_set(&pblk->read_failed, 0); | |
1022 | atomic_long_set(&pblk->read_empty, 0); | |
1023 | atomic_long_set(&pblk->read_high_ecc, 0); | |
1024 | atomic_long_set(&pblk->read_failed_gc, 0); | |
1025 | atomic_long_set(&pblk->write_failed, 0); | |
1026 | atomic_long_set(&pblk->erase_failed, 0); | |
1027 | ||
1028 | ret = pblk_luns_init(pblk, dev->luns); | |
1029 | if (ret) { | |
1030 | pr_err("pblk: could not initialize luns\n"); | |
1031 | goto fail; | |
1032 | } | |
1033 | ||
1034 | ret = pblk_lines_init(pblk); | |
1035 | if (ret) { | |
1036 | pr_err("pblk: could not initialize lines\n"); | |
1037 | goto fail_free_luns; | |
1038 | } | |
1039 | ||
5d149bfa HH |
1040 | pblk->pad_dist = kzalloc((pblk->min_write_pgs - 1) * sizeof(atomic64_t), |
1041 | GFP_KERNEL); | |
1042 | if (!pblk->pad_dist) { | |
1043 | ret = -ENOMEM; | |
1044 | goto fail_free_line_meta; | |
1045 | } | |
1046 | ||
a4bd217b JG |
1047 | ret = pblk_core_init(pblk); |
1048 | if (ret) { | |
1049 | pr_err("pblk: could not initialize core\n"); | |
5d149bfa | 1050 | goto fail_free_pad_dist; |
a4bd217b JG |
1051 | } |
1052 | ||
1053 | ret = pblk_l2p_init(pblk); | |
1054 | if (ret) { | |
1055 | pr_err("pblk: could not initialize maps\n"); | |
1056 | goto fail_free_core; | |
1057 | } | |
1058 | ||
1059 | ret = pblk_lines_configure(pblk, flags); | |
1060 | if (ret) { | |
1061 | pr_err("pblk: could not configure lines\n"); | |
1062 | goto fail_free_l2p; | |
1063 | } | |
1064 | ||
1065 | ret = pblk_writer_init(pblk); | |
1066 | if (ret) { | |
cc4f5ba1 JG |
1067 | if (ret != -EINTR) |
1068 | pr_err("pblk: could not initialize write thread\n"); | |
a4bd217b JG |
1069 | goto fail_free_lines; |
1070 | } | |
1071 | ||
1072 | ret = pblk_gc_init(pblk); | |
1073 | if (ret) { | |
1074 | pr_err("pblk: could not initialize gc\n"); | |
1075 | goto fail_stop_writer; | |
1076 | } | |
1077 | ||
1078 | /* inherit the size from the underlying device */ | |
1079 | blk_queue_logical_block_size(tqueue, queue_physical_block_size(bqueue)); | |
1080 | blk_queue_max_hw_sectors(tqueue, queue_max_hw_sectors(bqueue)); | |
1081 | ||
1082 | blk_queue_write_cache(tqueue, true, false); | |
1083 | ||
fae7fae4 | 1084 | tqueue->limits.discard_granularity = geo->sec_per_chk * geo->sec_size; |
a4bd217b JG |
1085 | tqueue->limits.discard_alignment = 0; |
1086 | blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9); | |
8b904b5b | 1087 | blk_queue_flag_set(QUEUE_FLAG_DISCARD, tqueue); |
a4bd217b | 1088 | |
30d82a86 JG |
1089 | pr_info("pblk(%s): luns:%u, lines:%d, secs:%llu, buf entries:%u\n", |
1090 | tdisk->disk_name, | |
fae7fae4 | 1091 | geo->all_luns, pblk->l_mg.nr_lines, |
a4bd217b JG |
1092 | (unsigned long long)pblk->rl.nr_secs, |
1093 | pblk->rwb.nr_entries); | |
1094 | ||
1095 | wake_up_process(pblk->writer_ts); | |
03661b5f HH |
1096 | |
1097 | /* Check if we need to start GC */ | |
1098 | pblk_gc_should_kick(pblk); | |
1099 | ||
a4bd217b JG |
1100 | return pblk; |
1101 | ||
1102 | fail_stop_writer: | |
1103 | pblk_writer_stop(pblk); | |
1104 | fail_free_lines: | |
1105 | pblk_lines_free(pblk); | |
1106 | fail_free_l2p: | |
1107 | pblk_l2p_free(pblk); | |
1108 | fail_free_core: | |
1109 | pblk_core_free(pblk); | |
5d149bfa HH |
1110 | fail_free_pad_dist: |
1111 | kfree(pblk->pad_dist); | |
a4bd217b JG |
1112 | fail_free_line_meta: |
1113 | pblk_line_meta_free(pblk); | |
1114 | fail_free_luns: | |
1115 | pblk_luns_free(pblk); | |
1116 | fail: | |
1117 | kfree(pblk); | |
1118 | return ERR_PTR(ret); | |
1119 | } | |
1120 | ||
1121 | /* physical block device target */ | |
1122 | static struct nvm_tgt_type tt_pblk = { | |
1123 | .name = "pblk", | |
1124 | .version = {1, 0, 0}, | |
1125 | ||
1126 | .make_rq = pblk_make_rq, | |
1127 | .capacity = pblk_capacity, | |
1128 | ||
1129 | .init = pblk_init, | |
1130 | .exit = pblk_exit, | |
1131 | ||
1132 | .sysfs_init = pblk_sysfs_init, | |
1133 | .sysfs_exit = pblk_sysfs_exit, | |
90014829 | 1134 | .owner = THIS_MODULE, |
a4bd217b JG |
1135 | }; |
1136 | ||
1137 | static int __init pblk_module_init(void) | |
1138 | { | |
b25d5237 N |
1139 | int ret; |
1140 | ||
1141 | pblk_bio_set = bioset_create(BIO_POOL_SIZE, 0, 0); | |
1142 | if (!pblk_bio_set) | |
1143 | return -ENOMEM; | |
1144 | ret = nvm_register_tgt_type(&tt_pblk); | |
1145 | if (ret) | |
1146 | bioset_free(pblk_bio_set); | |
1147 | return ret; | |
a4bd217b JG |
1148 | } |
1149 | ||
1150 | static void pblk_module_exit(void) | |
1151 | { | |
b25d5237 | 1152 | bioset_free(pblk_bio_set); |
a4bd217b JG |
1153 | nvm_unregister_tgt_type(&tt_pblk); |
1154 | } | |
1155 | ||
1156 | module_init(pblk_module_init); | |
1157 | module_exit(pblk_module_exit); | |
1158 | MODULE_AUTHOR("Javier Gonzalez <javier@cnexlabs.com>"); | |
1159 | MODULE_AUTHOR("Matias Bjorling <matias@cnexlabs.com>"); | |
1160 | MODULE_LICENSE("GPL v2"); | |
1161 | MODULE_DESCRIPTION("Physical Block-Device for Open-Channel SSDs"); |