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02a1520d | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
a4bd217b JG |
2 | /* |
3 | * Copyright (C) 2015 IT University of Copenhagen (rrpc.h) | |
4 | * Copyright (C) 2016 CNEX Labs | |
5 | * Initial release: Matias Bjorling <matias@cnexlabs.com> | |
6 | * Write buffering: Javier Gonzalez <javier@cnexlabs.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * Implementation of a Physical Block-device target for Open-channel SSDs. | |
18 | * | |
19 | */ | |
20 | ||
21 | #ifndef PBLK_H_ | |
22 | #define PBLK_H_ | |
23 | ||
24 | #include <linux/blkdev.h> | |
25 | #include <linux/blk-mq.h> | |
26 | #include <linux/bio.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/kthread.h> | |
29 | #include <linux/vmalloc.h> | |
30 | #include <linux/crc32.h> | |
31 | #include <linux/uuid.h> | |
32 | ||
33 | #include <linux/lightnvm.h> | |
34 | ||
35 | /* Run only GC if less than 1/X blocks are free */ | |
36 | #define GC_LIMIT_INVERSE 5 | |
37 | #define GC_TIME_MSECS 1000 | |
38 | ||
39 | #define PBLK_SECTOR (512) | |
40 | #define PBLK_EXPOSED_PAGE_SIZE (4096) | |
a4bd217b | 41 | |
ef576494 JG |
42 | #define PBLK_NR_CLOSE_JOBS (4) |
43 | ||
a4bd217b JG |
44 | #define PBLK_CACHE_NAME_LEN (DISK_NAME_LEN + 16) |
45 | ||
a4bd217b JG |
46 | /* Max 512 LUNs per device */ |
47 | #define PBLK_MAX_LUNS_BITMAP (4) | |
48 | ||
49 | #define NR_PHY_IN_LOG (PBLK_EXPOSED_PAGE_SIZE / PBLK_SECTOR) | |
50 | ||
0d880398 | 51 | /* Static pool sizes */ |
b84ae4a8 JG |
52 | #define PBLK_GEN_WS_POOL_SIZE (2) |
53 | ||
e5392739 JG |
54 | #define PBLK_DEFAULT_OP (11) |
55 | ||
e2cddf20 JG |
56 | enum { |
57 | PBLK_READ = READ, | |
58 | PBLK_WRITE = WRITE,/* Write from write buffer */ | |
59 | PBLK_WRITE_INT, /* Internal write - no write buffer */ | |
8f554597 | 60 | PBLK_READ_RECOV, /* Recovery read - errors allowed */ |
e2cddf20 JG |
61 | PBLK_ERASE, |
62 | }; | |
63 | ||
a4bd217b JG |
64 | enum { |
65 | /* IO Types */ | |
66 | PBLK_IOTYPE_USER = 1 << 0, | |
67 | PBLK_IOTYPE_GC = 1 << 1, | |
68 | ||
69 | /* Write buffer flags */ | |
70 | PBLK_FLUSH_ENTRY = 1 << 2, | |
71 | PBLK_WRITTEN_DATA = 1 << 3, | |
72 | PBLK_SUBMITTED_ENTRY = 1 << 4, | |
73 | PBLK_WRITABLE_ENTRY = 1 << 5, | |
74 | }; | |
75 | ||
76 | enum { | |
77 | PBLK_BLK_ST_OPEN = 0x1, | |
78 | PBLK_BLK_ST_CLOSED = 0x2, | |
79 | }; | |
80 | ||
4209c31c HH |
81 | enum { |
82 | PBLK_CHUNK_RESET_START, | |
83 | PBLK_CHUNK_RESET_DONE, | |
84 | PBLK_CHUNK_RESET_FAILED, | |
85 | }; | |
86 | ||
b20ba1bc JG |
87 | struct pblk_sec_meta { |
88 | u64 reserved; | |
89 | __le64 lba; | |
90 | }; | |
91 | ||
a4bd217b JG |
92 | /* The number of GC lists and the rate-limiter states go together. This way the |
93 | * rate-limiter can dictate how much GC is needed based on resource utilization. | |
94 | */ | |
48b8d208 | 95 | #define PBLK_GC_NR_LISTS 4 |
a4bd217b JG |
96 | |
97 | enum { | |
48b8d208 HH |
98 | PBLK_RL_OFF = 0, |
99 | PBLK_RL_WERR = 1, | |
100 | PBLK_RL_HIGH = 2, | |
101 | PBLK_RL_MID = 3, | |
102 | PBLK_RL_LOW = 4 | |
a4bd217b JG |
103 | }; |
104 | ||
afdc23c9 | 105 | #define pblk_dma_ppa_size (sizeof(u64) * NVM_MAX_VLBA) |
a4bd217b | 106 | |
084ec9ba | 107 | /* write buffer completion context */ |
a4bd217b JG |
108 | struct pblk_c_ctx { |
109 | struct list_head list; /* Head for out-of-order completion */ | |
110 | ||
111 | unsigned long *lun_bitmap; /* Luns used on current request */ | |
112 | unsigned int sentry; | |
113 | unsigned int nr_valid; | |
114 | unsigned int nr_padded; | |
115 | }; | |
116 | ||
a4809fee | 117 | /* read context */ |
084ec9ba JG |
118 | struct pblk_g_ctx { |
119 | void *private; | |
998ba629 | 120 | unsigned long start_time; |
a4809fee | 121 | u64 lba; |
a4bd217b JG |
122 | }; |
123 | ||
ee8d5c1a JG |
124 | /* Pad context */ |
125 | struct pblk_pad_rq { | |
126 | struct pblk *pblk; | |
127 | struct completion wait; | |
128 | struct kref ref; | |
129 | }; | |
130 | ||
a4bd217b JG |
131 | /* Recovery context */ |
132 | struct pblk_rec_ctx { | |
133 | struct pblk *pblk; | |
134 | struct nvm_rq *rqd; | |
a4bd217b JG |
135 | struct work_struct ws_rec; |
136 | }; | |
137 | ||
138 | /* Write context */ | |
139 | struct pblk_w_ctx { | |
140 | struct bio_list bios; /* Original bios - used for completion | |
141 | * in REQ_FUA, REQ_FLUSH case | |
142 | */ | |
ef697902 | 143 | u64 lba; /* Logic addr. associated with entry */ |
a4bd217b JG |
144 | struct ppa_addr ppa; /* Physic addr. associated with entry */ |
145 | int flags; /* Write context flags */ | |
146 | }; | |
147 | ||
148 | struct pblk_rb_entry { | |
149 | struct ppa_addr cacheline; /* Cacheline for this entry */ | |
150 | void *data; /* Pointer to data on this entry */ | |
151 | struct pblk_w_ctx w_ctx; /* Context for this entry */ | |
152 | struct list_head index; /* List head to enable indexes */ | |
153 | }; | |
154 | ||
155 | #define EMPTY_ENTRY (~0U) | |
156 | ||
157 | struct pblk_rb_pages { | |
158 | struct page *pages; | |
159 | int order; | |
160 | struct list_head list; | |
161 | }; | |
162 | ||
163 | struct pblk_rb { | |
164 | struct pblk_rb_entry *entries; /* Ring buffer entries */ | |
165 | unsigned int mem; /* Write offset - points to next | |
166 | * writable entry in memory | |
167 | */ | |
168 | unsigned int subm; /* Read offset - points to last entry | |
169 | * that has been submitted to the media | |
170 | * to be persisted | |
171 | */ | |
172 | unsigned int sync; /* Synced - backpointer that signals | |
173 | * the last submitted entry that has | |
174 | * been successfully persisted to media | |
175 | */ | |
8154d296 | 176 | unsigned int flush_point; /* Sync point - last entry that must be |
a4bd217b JG |
177 | * flushed to the media. Used with |
178 | * REQ_FLUSH and REQ_FUA | |
179 | */ | |
180 | unsigned int l2p_update; /* l2p update point - next entry for | |
181 | * which l2p mapping will be updated to | |
182 | * contain a device ppa address (instead | |
183 | * of a cacheline | |
184 | */ | |
185 | unsigned int nr_entries; /* Number of entries in write buffer - | |
186 | * must be a power of two | |
187 | */ | |
188 | unsigned int seg_size; /* Size of the data segments being | |
189 | * stored on each entry. Typically this | |
190 | * will be 4KB | |
191 | */ | |
192 | ||
766c8ceb JG |
193 | unsigned int back_thres; /* Threshold that shall be maintained by |
194 | * the backpointer in order to respect | |
195 | * geo->mw_cunits on a per chunk basis | |
196 | */ | |
197 | ||
a4bd217b JG |
198 | struct list_head pages; /* List of data pages */ |
199 | ||
200 | spinlock_t w_lock; /* Write lock */ | |
201 | spinlock_t s_lock; /* Sync lock */ | |
202 | ||
880eda54 | 203 | #ifdef CONFIG_NVM_PBLK_DEBUG |
8154d296 | 204 | atomic_t inflight_flush_point; /* Not served REQ_FLUSH | REQ_FUA */ |
a4bd217b JG |
205 | #endif |
206 | }; | |
207 | ||
208 | #define PBLK_RECOVERY_SECTORS 16 | |
209 | ||
210 | struct pblk_lun { | |
211 | struct ppa_addr bppa; | |
a4bd217b JG |
212 | struct semaphore wr_sem; |
213 | }; | |
214 | ||
215 | struct pblk_gc_rq { | |
216 | struct pblk_line *line; | |
217 | void *data; | |
afdc23c9 MB |
218 | u64 paddr_list[NVM_MAX_VLBA]; |
219 | u64 lba_list[NVM_MAX_VLBA]; | |
a4bd217b JG |
220 | int nr_secs; |
221 | int secs_to_gc; | |
222 | struct list_head list; | |
223 | }; | |
224 | ||
225 | struct pblk_gc { | |
b20ba1bc JG |
226 | /* These states are not protected by a lock since (i) they are in the |
227 | * fast path, and (ii) they are not critical. | |
228 | */ | |
a4bd217b JG |
229 | int gc_active; |
230 | int gc_enabled; | |
231 | int gc_forced; | |
a4bd217b JG |
232 | |
233 | struct task_struct *gc_ts; | |
234 | struct task_struct *gc_writer_ts; | |
b20ba1bc JG |
235 | struct task_struct *gc_reader_ts; |
236 | ||
237 | struct workqueue_struct *gc_line_reader_wq; | |
a4bd217b | 238 | struct workqueue_struct *gc_reader_wq; |
b20ba1bc | 239 | |
a4bd217b JG |
240 | struct timer_list gc_timer; |
241 | ||
b20ba1bc | 242 | struct semaphore gc_sem; |
d6b992f7 HH |
243 | atomic_t read_inflight_gc; /* Number of lines with inflight GC reads */ |
244 | atomic_t pipeline_gc; /* Number of lines in the GC pipeline - | |
245 | * started reads to finished writes | |
246 | */ | |
a4bd217b | 247 | int w_entries; |
b20ba1bc | 248 | |
a4bd217b | 249 | struct list_head w_list; |
b20ba1bc | 250 | struct list_head r_list; |
a4bd217b JG |
251 | |
252 | spinlock_t lock; | |
253 | spinlock_t w_lock; | |
b20ba1bc | 254 | spinlock_t r_lock; |
a4bd217b JG |
255 | }; |
256 | ||
257 | struct pblk_rl { | |
258 | unsigned int high; /* Upper threshold for rate limiter (free run - | |
259 | * user I/O rate limiter | |
260 | */ | |
a4bd217b JG |
261 | unsigned int high_pw; /* High rounded up as a power of 2 */ |
262 | ||
b20ba1bc JG |
263 | #define PBLK_USER_HIGH_THRS 8 /* Begin write limit at 12% available blks */ |
264 | #define PBLK_USER_LOW_THRS 10 /* Aggressive GC at 10% available blocks */ | |
a4bd217b JG |
265 | |
266 | int rb_windows_pw; /* Number of rate windows in the write buffer | |
267 | * given as a power-of-2. This guarantees that | |
268 | * when user I/O is being rate limited, there | |
269 | * will be reserved enough space for the GC to | |
270 | * place its payload. A window is of | |
271 | * pblk->max_write_pgs size, which in NVMe is | |
272 | * 64, i.e., 256kb. | |
273 | */ | |
274 | int rb_budget; /* Total number of entries available for I/O */ | |
275 | int rb_user_max; /* Max buffer entries available for user I/O */ | |
a4bd217b JG |
276 | int rb_gc_max; /* Max buffer entries available for GC I/O */ |
277 | int rb_gc_rsv; /* Reserved buffer entries for GC I/O */ | |
278 | int rb_state; /* Rate-limiter current state */ | |
da67e68f | 279 | int rb_max_io; /* Maximum size for an I/O giving the config */ |
588726d3 JG |
280 | |
281 | atomic_t rb_user_cnt; /* User I/O buffer counter */ | |
a4bd217b | 282 | atomic_t rb_gc_cnt; /* GC I/O buffer counter */ |
588726d3 | 283 | atomic_t rb_space; /* Space limit in case of reaching capacity */ |
a4bd217b | 284 | |
b20ba1bc JG |
285 | int rsv_blocks; /* Reserved blocks for GC */ |
286 | ||
a4bd217b | 287 | int rb_user_active; |
b20ba1bc JG |
288 | int rb_gc_active; |
289 | ||
48b8d208 HH |
290 | atomic_t werr_lines; /* Number of write error lines that needs gc */ |
291 | ||
a4bd217b JG |
292 | struct timer_list u_timer; |
293 | ||
a4bd217b | 294 | unsigned long total_blocks; |
a7689938 JG |
295 | |
296 | atomic_t free_blocks; /* Total number of free blocks (+ OP) */ | |
297 | atomic_t free_user_blocks; /* Number of user free blocks (no OP) */ | |
a4bd217b JG |
298 | }; |
299 | ||
a4bd217b JG |
300 | #define PBLK_LINE_EMPTY (~0U) |
301 | ||
302 | enum { | |
303 | /* Line Types */ | |
304 | PBLK_LINETYPE_FREE = 0, | |
305 | PBLK_LINETYPE_LOG = 1, | |
306 | PBLK_LINETYPE_DATA = 2, | |
307 | ||
308 | /* Line state */ | |
32ef9412 | 309 | PBLK_LINESTATE_NEW = 9, |
a4bd217b JG |
310 | PBLK_LINESTATE_FREE = 10, |
311 | PBLK_LINESTATE_OPEN = 11, | |
312 | PBLK_LINESTATE_CLOSED = 12, | |
313 | PBLK_LINESTATE_GC = 13, | |
314 | PBLK_LINESTATE_BAD = 14, | |
315 | PBLK_LINESTATE_CORRUPT = 15, | |
316 | ||
317 | /* GC group */ | |
318 | PBLK_LINEGC_NONE = 20, | |
319 | PBLK_LINEGC_EMPTY = 21, | |
320 | PBLK_LINEGC_LOW = 22, | |
321 | PBLK_LINEGC_MID = 23, | |
322 | PBLK_LINEGC_HIGH = 24, | |
323 | PBLK_LINEGC_FULL = 25, | |
48b8d208 | 324 | PBLK_LINEGC_WERR = 26 |
a4bd217b JG |
325 | }; |
326 | ||
327 | #define PBLK_MAGIC 0x70626c6b /*pblk*/ | |
d0ab0b1a HH |
328 | |
329 | /* emeta/smeta persistent storage format versions: | |
330 | * Changes in major version requires offline migration. | |
331 | * Changes in minor version are handled automatically during | |
332 | * recovery. | |
333 | */ | |
334 | ||
335 | #define SMETA_VERSION_MAJOR (0) | |
336 | #define SMETA_VERSION_MINOR (1) | |
337 | ||
338 | #define EMETA_VERSION_MAJOR (0) | |
76758390 | 339 | #define EMETA_VERSION_MINOR (2) |
a4bd217b JG |
340 | |
341 | struct line_header { | |
342 | __le32 crc; | |
343 | __le32 identifier; /* pblk identifier */ | |
344 | __u8 uuid[16]; /* instance uuid */ | |
345 | __le16 type; /* line type */ | |
d0ab0b1a HH |
346 | __u8 version_major; /* version major */ |
347 | __u8 version_minor; /* version minor */ | |
a4bd217b JG |
348 | __le32 id; /* line id for current line */ |
349 | }; | |
350 | ||
351 | struct line_smeta { | |
352 | struct line_header header; | |
353 | ||
354 | __le32 crc; /* Full structure including struct crc */ | |
355 | /* Previous line metadata */ | |
356 | __le32 prev_id; /* Line id for previous line */ | |
357 | ||
358 | /* Current line metadata */ | |
359 | __le64 seq_nr; /* Sequence number for current line */ | |
360 | ||
361 | /* Active writers */ | |
362 | __le32 window_wr_lun; /* Number of parallel LUNs to write */ | |
363 | ||
364 | __le32 rsvd[2]; | |
dd2a4343 JG |
365 | |
366 | __le64 lun_bitmap[]; | |
a4bd217b JG |
367 | }; |
368 | ||
76758390 | 369 | |
a4bd217b | 370 | /* |
dd2a4343 JG |
371 | * Metadata layout in media: |
372 | * First sector: | |
373 | * 1. struct line_emeta | |
374 | * 2. bad block bitmap (u64 * window_wr_lun) | |
76758390 | 375 | * 3. write amplification counters |
dd2a4343 JG |
376 | * Mid sectors (start at lbas_sector): |
377 | * 3. nr_lbas (u64) forming lba list | |
378 | * Last sectors (start at vsc_sector): | |
379 | * 4. u32 valid sector count (vsc) for all lines (~0U: free line) | |
a4bd217b JG |
380 | */ |
381 | struct line_emeta { | |
382 | struct line_header header; | |
383 | ||
384 | __le32 crc; /* Full structure including struct crc */ | |
385 | ||
386 | /* Previous line metadata */ | |
387 | __le32 prev_id; /* Line id for prev line */ | |
388 | ||
389 | /* Current line metadata */ | |
390 | __le64 seq_nr; /* Sequence number for current line */ | |
391 | ||
392 | /* Active writers */ | |
393 | __le32 window_wr_lun; /* Number of parallel LUNs to write */ | |
394 | ||
395 | /* Bookkeeping for recovery */ | |
396 | __le32 next_id; /* Line id for next line */ | |
397 | __le64 nr_lbas; /* Number of lbas mapped in line */ | |
398 | __le64 nr_valid_lbas; /* Number of valid lbas mapped in line */ | |
76758390 HH |
399 | __le64 bb_bitmap[]; /* Updated bad block bitmap for line */ |
400 | }; | |
401 | ||
402 | ||
403 | /* Write amplification counters stored on media */ | |
404 | struct wa_counters { | |
405 | __le64 user; /* Number of user written sectors */ | |
406 | __le64 gc; /* Number of sectors written by GC*/ | |
407 | __le64 pad; /* Number of padded sectors */ | |
dd2a4343 JG |
408 | }; |
409 | ||
410 | struct pblk_emeta { | |
411 | struct line_emeta *buf; /* emeta buffer in media format */ | |
412 | int mem; /* Write offset - points to next | |
413 | * writable entry in memory | |
414 | */ | |
415 | atomic_t sync; /* Synced - backpointer that signals the | |
416 | * last entry that has been successfully | |
417 | * persisted to media | |
418 | */ | |
419 | unsigned int nr_entries; /* Number of emeta entries */ | |
420 | }; | |
421 | ||
422 | struct pblk_smeta { | |
423 | struct line_smeta *buf; /* smeta buffer in persistent format */ | |
a4bd217b JG |
424 | }; |
425 | ||
48b8d208 HH |
426 | struct pblk_w_err_gc { |
427 | int has_write_err; | |
f2e02457 | 428 | int has_gc_err; |
48b8d208 HH |
429 | __le64 *lba_list; |
430 | }; | |
431 | ||
a4bd217b JG |
432 | struct pblk_line { |
433 | struct pblk *pblk; | |
434 | unsigned int id; /* Line number corresponds to the | |
435 | * block line | |
436 | */ | |
437 | unsigned int seq_nr; /* Unique line sequence number */ | |
438 | ||
439 | int state; /* PBLK_LINESTATE_X */ | |
440 | int type; /* PBLK_LINETYPE_X */ | |
441 | int gc_group; /* PBLK_LINEGC_X */ | |
442 | struct list_head list; /* Free, GC lists */ | |
443 | ||
444 | unsigned long *lun_bitmap; /* Bitmap for LUNs mapped in line */ | |
445 | ||
32ef9412 JG |
446 | struct nvm_chk_meta *chks; /* Chunks forming line */ |
447 | ||
dd2a4343 JG |
448 | struct pblk_smeta *smeta; /* Start metadata */ |
449 | struct pblk_emeta *emeta; /* End medatada */ | |
450 | ||
a4bd217b | 451 | int meta_line; /* Metadata line id */ |
dd2a4343 JG |
452 | int meta_distance; /* Distance between data and metadata */ |
453 | ||
a4bd217b JG |
454 | u64 emeta_ssec; /* Sector where emeta starts */ |
455 | ||
456 | unsigned int sec_in_line; /* Number of usable secs in line */ | |
457 | ||
a44f53fa | 458 | atomic_t blk_in_line; /* Number of good blocks in line */ |
a4bd217b JG |
459 | unsigned long *blk_bitmap; /* Bitmap for valid/invalid blocks */ |
460 | unsigned long *erase_bitmap; /* Bitmap for erased blocks */ | |
461 | ||
462 | unsigned long *map_bitmap; /* Bitmap for mapped sectors in line */ | |
463 | unsigned long *invalid_bitmap; /* Bitmap for invalid sectors in line */ | |
464 | ||
a44f53fa | 465 | atomic_t left_eblks; /* Blocks left for erasing */ |
a4bd217b JG |
466 | atomic_t left_seblks; /* Blocks left for sync erasing */ |
467 | ||
468 | int left_msecs; /* Sectors left for mapping */ | |
a4bd217b | 469 | unsigned int cur_sec; /* Sector map pointer */ |
dd2a4343 JG |
470 | unsigned int nr_valid_lbas; /* Number of valid lbas in line */ |
471 | ||
472 | __le32 *vsc; /* Valid sector count in line */ | |
a4bd217b JG |
473 | |
474 | struct kref ref; /* Write buffer L2P references */ | |
0586942f | 475 | atomic_t sec_to_update; /* Outstanding L2P updates to ppa */ |
a4bd217b | 476 | |
48b8d208 HH |
477 | struct pblk_w_err_gc *w_err_gc; /* Write error gc recovery metadata */ |
478 | ||
a4bd217b JG |
479 | spinlock_t lock; /* Necessary for invalid_bitmap only */ |
480 | }; | |
481 | ||
a44f53fa | 482 | #define PBLK_DATA_LINES 4 |
a4bd217b | 483 | |
dd2a4343 JG |
484 | enum { |
485 | PBLK_EMETA_TYPE_HEADER = 1, /* struct line_emeta first sector */ | |
486 | PBLK_EMETA_TYPE_LLBA = 2, /* lba list - type: __le64 */ | |
487 | PBLK_EMETA_TYPE_VSC = 3, /* vsc list - type: __le32 */ | |
a4bd217b JG |
488 | }; |
489 | ||
490 | struct pblk_line_mgmt { | |
491 | int nr_lines; /* Total number of full lines */ | |
492 | int nr_free_lines; /* Number of full lines in free list */ | |
493 | ||
494 | /* Free lists - use free_lock */ | |
495 | struct list_head free_list; /* Full lines ready to use */ | |
496 | struct list_head corrupt_list; /* Full lines corrupted */ | |
497 | struct list_head bad_list; /* Full lines bad */ | |
498 | ||
499 | /* GC lists - use gc_lock */ | |
b20ba1bc | 500 | struct list_head *gc_lists[PBLK_GC_NR_LISTS]; |
a4bd217b JG |
501 | struct list_head gc_high_list; /* Full lines ready to GC, high isc */ |
502 | struct list_head gc_mid_list; /* Full lines ready to GC, mid isc */ | |
503 | struct list_head gc_low_list; /* Full lines ready to GC, low isc */ | |
504 | ||
48b8d208 HH |
505 | struct list_head gc_werr_list; /* Write err recovery list */ |
506 | ||
a4bd217b JG |
507 | struct list_head gc_full_list; /* Full lines ready to GC, no valid */ |
508 | struct list_head gc_empty_list; /* Full lines close, all valid */ | |
509 | ||
510 | struct pblk_line *log_line; /* Current FTL log line */ | |
511 | struct pblk_line *data_line; /* Current data line */ | |
512 | struct pblk_line *log_next; /* Next FTL log line */ | |
513 | struct pblk_line *data_next; /* Next data line */ | |
514 | ||
dd2a4343 JG |
515 | struct list_head emeta_list; /* Lines queued to schedule emeta */ |
516 | ||
517 | __le32 *vsc_list; /* Valid sector counts for all lines */ | |
518 | ||
a4bd217b | 519 | /* Pre-allocated metadata for data lines */ |
dd2a4343 JG |
520 | struct pblk_smeta *sline_meta[PBLK_DATA_LINES]; |
521 | struct pblk_emeta *eline_meta[PBLK_DATA_LINES]; | |
a4bd217b JG |
522 | unsigned long meta_bitmap; |
523 | ||
53d82db6 HH |
524 | /* Cache and mempool for map/invalid bitmaps */ |
525 | struct kmem_cache *bitmap_cache; | |
526 | mempool_t *bitmap_pool; | |
527 | ||
a4bd217b JG |
528 | /* Helpers for fast bitmap calculations */ |
529 | unsigned long *bb_template; | |
530 | unsigned long *bb_aux; | |
531 | ||
532 | unsigned long d_seq_nr; /* Data line unique sequence number */ | |
533 | unsigned long l_seq_nr; /* Log line unique sequence number */ | |
534 | ||
535 | spinlock_t free_lock; | |
dd2a4343 | 536 | spinlock_t close_lock; |
a4bd217b JG |
537 | spinlock_t gc_lock; |
538 | }; | |
539 | ||
540 | struct pblk_line_meta { | |
541 | unsigned int smeta_len; /* Total length for smeta */ | |
dd2a4343 JG |
542 | unsigned int smeta_sec; /* Sectors needed for smeta */ |
543 | ||
544 | unsigned int emeta_len[4]; /* Lengths for emeta: | |
76758390 HH |
545 | * [0]: Total |
546 | * [1]: struct line_emeta + | |
547 | * bb_bitmap + struct wa_counters | |
548 | * [2]: L2P portion | |
549 | * [3]: vsc | |
dd2a4343 JG |
550 | */ |
551 | unsigned int emeta_sec[4]; /* Sectors needed for emeta. Same layout | |
552 | * as emeta_len | |
553 | */ | |
554 | ||
a4bd217b | 555 | unsigned int emeta_bb; /* Boundary for bb that affects emeta */ |
dd2a4343 JG |
556 | |
557 | unsigned int vsc_list_len; /* Length for vsc list */ | |
a4bd217b JG |
558 | unsigned int sec_bitmap_len; /* Length for sector bitmap in line */ |
559 | unsigned int blk_bitmap_len; /* Length for block bitmap in line */ | |
560 | unsigned int lun_bitmap_len; /* Length for lun bitmap in line */ | |
561 | ||
562 | unsigned int blk_per_line; /* Number of blocks in a full line */ | |
563 | unsigned int sec_per_line; /* Number of sectors in a line */ | |
dd2a4343 | 564 | unsigned int dsec_per_line; /* Number of data sectors in a line */ |
a4bd217b JG |
565 | unsigned int min_blk_line; /* Min. number of good blocks in line */ |
566 | ||
567 | unsigned int mid_thrs; /* Threshold for GC mid list */ | |
568 | unsigned int high_thrs; /* Threshold for GC high list */ | |
dd2a4343 JG |
569 | |
570 | unsigned int meta_distance; /* Distance between data and metadata */ | |
a4bd217b JG |
571 | }; |
572 | ||
588726d3 JG |
573 | enum { |
574 | PBLK_STATE_RUNNING = 0, | |
575 | PBLK_STATE_STOPPING = 1, | |
576 | PBLK_STATE_RECOVERING = 2, | |
577 | PBLK_STATE_STOPPED = 3, | |
578 | }; | |
579 | ||
3b2a3ad1 JG |
580 | /* Internal format to support not power-of-2 device formats */ |
581 | struct pblk_addrf { | |
582 | /* gen to dev */ | |
583 | int sec_stripe; | |
584 | int ch_stripe; | |
585 | int lun_stripe; | |
586 | ||
587 | /* dev to gen */ | |
588 | int sec_lun_stripe; | |
589 | int sec_ws_stripe; | |
590 | }; | |
591 | ||
a4bd217b JG |
592 | struct pblk { |
593 | struct nvm_tgt_dev *dev; | |
594 | struct gendisk *disk; | |
595 | ||
596 | struct kobject kobj; | |
597 | ||
598 | struct pblk_lun *luns; | |
599 | ||
600 | struct pblk_line *lines; /* Line array */ | |
601 | struct pblk_line_mgmt l_mg; /* Line management */ | |
602 | struct pblk_line_meta lm; /* Line metadata */ | |
603 | ||
3b2a3ad1 JG |
604 | struct nvm_addrf addrf; /* Aligned address format */ |
605 | struct pblk_addrf uaddrf; /* Unaligned address format */ | |
bb845ae4 | 606 | int addrf_len; |
a4bd217b JG |
607 | |
608 | struct pblk_rb rwb; | |
609 | ||
588726d3 JG |
610 | int state; /* pblk line state */ |
611 | ||
a4bd217b | 612 | int min_write_pgs; /* Minimum amount of pages required by controller */ |
55d8ec35 | 613 | int min_write_pgs_data; /* Minimum amount of payload pages */ |
a4bd217b | 614 | int max_write_pgs; /* Maximum amount of pages supported by controller */ |
faa79f27 | 615 | int oob_meta_size; /* Size of OOB sector metadata */ |
a4bd217b JG |
616 | |
617 | sector_t capacity; /* Device capacity when bad blocks are subtracted */ | |
a7689938 JG |
618 | |
619 | int op; /* Percentage of device used for over-provisioning */ | |
620 | int op_blks; /* Number of blocks used for over-provisioning */ | |
a4bd217b JG |
621 | |
622 | /* pblk provisioning values. Used by rate limiter */ | |
623 | struct pblk_rl rl; | |
624 | ||
c2e9f5d4 | 625 | int sec_per_write; |
a4bd217b | 626 | |
7e0a0847 | 627 | guid_t instance_uuid; |
76758390 HH |
628 | |
629 | /* Persistent write amplification counters, 4kb sector I/Os */ | |
630 | atomic64_t user_wa; /* Sectors written by user */ | |
631 | atomic64_t gc_wa; /* Sectors written by GC */ | |
632 | atomic64_t pad_wa; /* Padded sectors written */ | |
633 | ||
634 | /* Reset values for delta write amplification measurements */ | |
635 | u64 user_rst_wa; | |
636 | u64 gc_rst_wa; | |
637 | u64 pad_rst_wa; | |
638 | ||
5d149bfa HH |
639 | /* Counters used for calculating padding distribution */ |
640 | atomic64_t *pad_dist; /* Padding distribution buckets */ | |
641 | u64 nr_flush_rst; /* Flushes reset value for pad dist.*/ | |
642 | atomic64_t nr_flush; /* Number of flush/fua I/O */ | |
643 | ||
880eda54 | 644 | #ifdef CONFIG_NVM_PBLK_DEBUG |
76758390 | 645 | /* Non-persistent debug counters, 4kb sector I/Os */ |
a4bd217b JG |
646 | atomic_long_t inflight_writes; /* Inflight writes (user and gc) */ |
647 | atomic_long_t padded_writes; /* Sectors padded due to flush/fua */ | |
648 | atomic_long_t padded_wb; /* Sectors padded in write buffer */ | |
a4bd217b JG |
649 | atomic_long_t req_writes; /* Sectors stored on write buffer */ |
650 | atomic_long_t sub_writes; /* Sectors submitted from buffer */ | |
651 | atomic_long_t sync_writes; /* Sectors synced to media */ | |
a4bd217b | 652 | atomic_long_t inflight_reads; /* Inflight sector read requests */ |
db7ada33 | 653 | atomic_long_t cache_reads; /* Read requests that hit the cache */ |
a4bd217b JG |
654 | atomic_long_t sync_reads; /* Completed sector read requests */ |
655 | atomic_long_t recov_writes; /* Sectors submitted from recovery */ | |
656 | atomic_long_t recov_gc_writes; /* Sectors submitted from write GC */ | |
657 | atomic_long_t recov_gc_reads; /* Sectors submitted from read GC */ | |
658 | #endif | |
659 | ||
660 | spinlock_t lock; | |
661 | ||
662 | atomic_long_t read_failed; | |
663 | atomic_long_t read_empty; | |
664 | atomic_long_t read_high_ecc; | |
665 | atomic_long_t read_failed_gc; | |
666 | atomic_long_t write_failed; | |
667 | atomic_long_t erase_failed; | |
668 | ||
588726d3 JG |
669 | atomic_t inflight_io; /* General inflight I/O counter */ |
670 | ||
a4bd217b JG |
671 | struct task_struct *writer_ts; |
672 | ||
673 | /* Simple translation map of logical addresses to physical addresses. | |
674 | * The logical addresses is known by the host system, while the physical | |
675 | * addresses are used when writing to the disk block device. | |
676 | */ | |
677 | unsigned char *trans_map; | |
678 | spinlock_t trans_lock; | |
679 | ||
680 | struct list_head compl_list; | |
681 | ||
6a3abf5b HH |
682 | spinlock_t resubmit_lock; /* Resubmit list lock */ |
683 | struct list_head resubmit_list; /* Resubmit list for failed writes*/ | |
684 | ||
b906bbb6 KO |
685 | mempool_t page_bio_pool; |
686 | mempool_t gen_ws_pool; | |
687 | mempool_t rec_pool; | |
688 | mempool_t r_rq_pool; | |
689 | mempool_t w_rq_pool; | |
690 | mempool_t e_rq_pool; | |
a4bd217b | 691 | |
ef576494 JG |
692 | struct workqueue_struct *close_wq; |
693 | struct workqueue_struct *bb_wq; | |
7bd4d370 | 694 | struct workqueue_struct *r_end_wq; |
ef576494 | 695 | |
a4bd217b JG |
696 | struct timer_list wtimer; |
697 | ||
698 | struct pblk_gc gc; | |
699 | }; | |
700 | ||
701 | struct pblk_line_ws { | |
702 | struct pblk *pblk; | |
703 | struct pblk_line *line; | |
704 | void *priv; | |
705 | struct work_struct ws; | |
706 | }; | |
707 | ||
084ec9ba | 708 | #define pblk_g_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_g_ctx)) |
a4bd217b JG |
709 | #define pblk_w_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_c_ctx)) |
710 | ||
4e495a46 MB |
711 | #define pblk_err(pblk, fmt, ...) \ |
712 | pr_err("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__) | |
713 | #define pblk_info(pblk, fmt, ...) \ | |
714 | pr_info("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__) | |
715 | #define pblk_warn(pblk, fmt, ...) \ | |
716 | pr_warn("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__) | |
717 | #define pblk_debug(pblk, fmt, ...) \ | |
718 | pr_debug("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__) | |
719 | ||
a4bd217b JG |
720 | /* |
721 | * pblk ring buffer operations | |
722 | */ | |
766c8ceb JG |
723 | int pblk_rb_init(struct pblk_rb *rb, unsigned int size, unsigned int threshold, |
724 | unsigned int seg_sz); | |
a4bd217b JG |
725 | int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio, |
726 | unsigned int nr_entries, unsigned int *pos); | |
727 | int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries, | |
728 | unsigned int *pos); | |
729 | void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data, | |
730 | struct pblk_w_ctx w_ctx, unsigned int pos); | |
731 | void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data, | |
d340121e JG |
732 | struct pblk_w_ctx w_ctx, struct pblk_line *line, |
733 | u64 paddr, unsigned int pos); | |
a4bd217b | 734 | struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos); |
588726d3 | 735 | void pblk_rb_flush(struct pblk_rb *rb); |
a4bd217b JG |
736 | |
737 | void pblk_rb_sync_l2p(struct pblk_rb *rb); | |
d624f371 | 738 | unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd, |
875d94f3 JG |
739 | unsigned int pos, unsigned int nr_entries, |
740 | unsigned int count); | |
a4bd217b | 741 | int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba, |
a96de64a | 742 | struct ppa_addr ppa); |
a4bd217b JG |
743 | unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries); |
744 | ||
745 | unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags); | |
746 | unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries); | |
40b8657d JG |
747 | unsigned int pblk_rb_ptr_wrap(struct pblk_rb *rb, unsigned int p, |
748 | unsigned int nr_entries); | |
a4bd217b | 749 | void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags); |
8154d296 | 750 | unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb); |
a4bd217b JG |
751 | |
752 | unsigned int pblk_rb_read_count(struct pblk_rb *rb); | |
ee8d5c1a | 753 | unsigned int pblk_rb_sync_count(struct pblk_rb *rb); |
a4bd217b JG |
754 | unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos); |
755 | ||
756 | int pblk_rb_tear_down_check(struct pblk_rb *rb); | |
757 | int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos); | |
9bd1f875 | 758 | void pblk_rb_free(struct pblk_rb *rb); |
a4bd217b JG |
759 | ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf); |
760 | ||
761 | /* | |
762 | * pblk core | |
763 | */ | |
67bf26a3 JG |
764 | struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type); |
765 | void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type); | |
45dcf29b JG |
766 | int pblk_alloc_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd); |
767 | void pblk_free_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd); | |
c2e9f5d4 | 768 | void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write); |
a4bd217b JG |
769 | int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd, |
770 | struct pblk_c_ctx *c_ctx); | |
a4bd217b | 771 | void pblk_discard(struct pblk *pblk, struct bio *bio); |
aff3fb18 | 772 | struct nvm_chk_meta *pblk_get_chunk_meta(struct pblk *pblk); |
32ef9412 JG |
773 | struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk, |
774 | struct nvm_chk_meta *lp, | |
775 | struct ppa_addr ppa); | |
a4bd217b JG |
776 | void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd); |
777 | void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd); | |
48e5da72 HH |
778 | int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd, void *buf); |
779 | int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd, void *buf); | |
dd2a4343 | 780 | int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line); |
4c44abf4 | 781 | void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd); |
a4bd217b JG |
782 | struct pblk_line *pblk_line_get(struct pblk *pblk); |
783 | struct pblk_line *pblk_line_get_first_data(struct pblk *pblk); | |
21d22871 | 784 | struct pblk_line *pblk_line_replace_data(struct pblk *pblk); |
ae14cc04 MB |
785 | void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa); |
786 | void pblk_rq_to_line_put(struct pblk *pblk, struct nvm_rq *rqd); | |
a4bd217b JG |
787 | int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line); |
788 | void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line); | |
789 | struct pblk_line *pblk_line_get_data(struct pblk *pblk); | |
d624f371 | 790 | struct pblk_line *pblk_line_get_erase(struct pblk *pblk); |
a4bd217b JG |
791 | int pblk_line_erase(struct pblk *pblk, struct pblk_line *line); |
792 | int pblk_line_is_full(struct pblk_line *line); | |
8e55c07b | 793 | void pblk_line_free(struct pblk_line *line); |
dd2a4343 | 794 | void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line); |
a4bd217b | 795 | void pblk_line_close(struct pblk *pblk, struct pblk_line *line); |
dd2a4343 | 796 | void pblk_line_close_ws(struct work_struct *work); |
588726d3 | 797 | void pblk_pipeline_stop(struct pblk *pblk); |
a7c9e910 JG |
798 | void __pblk_pipeline_stop(struct pblk *pblk); |
799 | void __pblk_pipeline_flush(struct pblk *pblk); | |
b84ae4a8 JG |
800 | void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv, |
801 | void (*work)(struct work_struct *), gfp_t gfp_mask, | |
802 | struct workqueue_struct *wq); | |
a4bd217b | 803 | u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line); |
af3fac16 JG |
804 | int pblk_line_smeta_read(struct pblk *pblk, struct pblk_line *line); |
805 | int pblk_line_emeta_read(struct pblk *pblk, struct pblk_line *line, | |
dd2a4343 | 806 | void *emeta_buf); |
a4bd217b JG |
807 | int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa); |
808 | void pblk_line_put(struct kref *ref); | |
7bd4d370 | 809 | void pblk_line_put_wq(struct kref *ref); |
a4bd217b | 810 | struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line); |
dd2a4343 JG |
811 | u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line); |
812 | void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); | |
a4bd217b | 813 | u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); |
dd2a4343 | 814 | u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); |
a4bd217b | 815 | int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail, |
55d8ec35 | 816 | unsigned long secs_to_flush, bool skip_meta); |
43241cfe | 817 | void pblk_down_rq(struct pblk *pblk, struct ppa_addr ppa, |
a4bd217b | 818 | unsigned long *lun_bitmap); |
43241cfe MB |
819 | void pblk_down_chunk(struct pblk *pblk, struct ppa_addr ppa); |
820 | void pblk_up_chunk(struct pblk *pblk, struct ppa_addr ppa); | |
e99e802f | 821 | void pblk_up_rq(struct pblk *pblk, unsigned long *lun_bitmap); |
a4bd217b JG |
822 | int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, |
823 | int nr_pages); | |
a4bd217b JG |
824 | void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, |
825 | int nr_pages); | |
826 | void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa); | |
0880a9aa JG |
827 | void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, |
828 | u64 paddr); | |
a4bd217b JG |
829 | void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa); |
830 | void pblk_update_map_cache(struct pblk *pblk, sector_t lba, | |
831 | struct ppa_addr ppa); | |
832 | void pblk_update_map_dev(struct pblk *pblk, sector_t lba, | |
833 | struct ppa_addr ppa, struct ppa_addr entry_line); | |
834 | int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa, | |
d340121e | 835 | struct pblk_line *gc_line, u64 paddr); |
a4bd217b JG |
836 | void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas, |
837 | u64 *lba_list, int nr_secs); | |
a96de64a IK |
838 | int pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas, |
839 | sector_t blba, int nr_secs, bool *from_cache); | |
55d8ec35 IK |
840 | void *pblk_get_meta_for_writes(struct pblk *pblk, struct nvm_rq *rqd); |
841 | void pblk_get_packed_meta(struct pblk *pblk, struct nvm_rq *rqd); | |
a4bd217b JG |
842 | |
843 | /* | |
844 | * pblk user I/O write path | |
845 | */ | |
3e03f632 | 846 | void pblk_write_to_cache(struct pblk *pblk, struct bio *bio, |
a4bd217b | 847 | unsigned long flags); |
d340121e | 848 | int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq); |
a4bd217b JG |
849 | |
850 | /* | |
851 | * pblk map | |
852 | */ | |
525f7bb2 | 853 | int pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd, |
a4bd217b JG |
854 | unsigned int sentry, unsigned long *lun_bitmap, |
855 | unsigned int valid_secs, struct ppa_addr *erase_ppa); | |
525f7bb2 | 856 | int pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry, |
a4bd217b JG |
857 | unsigned long *lun_bitmap, unsigned int valid_secs, |
858 | unsigned int off); | |
859 | ||
860 | /* | |
861 | * pblk write thread | |
862 | */ | |
863 | int pblk_write_ts(void *data); | |
87c1d2d3 | 864 | void pblk_write_timer_fn(struct timer_list *t); |
a4bd217b | 865 | void pblk_write_should_kick(struct pblk *pblk); |
cc9c9a00 | 866 | void pblk_write_kick(struct pblk *pblk); |
a4bd217b JG |
867 | |
868 | /* | |
869 | * pblk read path | |
870 | */ | |
b906bbb6 | 871 | extern struct bio_set pblk_bio_set; |
3e03f632 | 872 | void pblk_submit_read(struct pblk *pblk, struct bio *bio); |
d340121e | 873 | int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq); |
a4bd217b JG |
874 | /* |
875 | * pblk recovery | |
876 | */ | |
a4bd217b | 877 | struct pblk_line *pblk_recov_l2p(struct pblk *pblk); |
588726d3 | 878 | int pblk_recov_pad(struct pblk *pblk); |
06bc072b | 879 | int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta); |
a4bd217b JG |
880 | |
881 | /* | |
882 | * pblk gc | |
883 | */ | |
b20ba1bc | 884 | #define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */ |
3627896a | 885 | #define PBLK_GC_RQ_QD 128 /* Queue depth for inflight GC requests */ |
b20ba1bc | 886 | #define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */ |
a4bd217b JG |
887 | |
888 | int pblk_gc_init(struct pblk *pblk); | |
a7c9e910 | 889 | void pblk_gc_exit(struct pblk *pblk, bool graceful); |
a4bd217b JG |
890 | void pblk_gc_should_start(struct pblk *pblk); |
891 | void pblk_gc_should_stop(struct pblk *pblk); | |
03661b5f | 892 | void pblk_gc_should_kick(struct pblk *pblk); |
37ce33d5 | 893 | void pblk_gc_free_full_lines(struct pblk *pblk); |
a4bd217b JG |
894 | void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled, |
895 | int *gc_active); | |
b20ba1bc | 896 | int pblk_gc_sysfs_force(struct pblk *pblk, int force); |
f2e02457 | 897 | void pblk_put_line_back(struct pblk *pblk, struct pblk_line *line); |
a4bd217b JG |
898 | |
899 | /* | |
900 | * pblk rate limiter | |
901 | */ | |
b4cdc426 | 902 | void pblk_rl_init(struct pblk_rl *rl, int budget, int threshold); |
a4bd217b | 903 | void pblk_rl_free(struct pblk_rl *rl); |
03661b5f | 904 | void pblk_rl_update_rates(struct pblk_rl *rl); |
b20ba1bc | 905 | int pblk_rl_high_thrs(struct pblk_rl *rl); |
a4bd217b | 906 | unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl); |
a7689938 | 907 | unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl); |
a4bd217b | 908 | int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries); |
588726d3 | 909 | void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries); |
a4bd217b JG |
910 | void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries); |
911 | int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries); | |
912 | void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries); | |
913 | void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc); | |
da67e68f | 914 | int pblk_rl_max_io(struct pblk_rl *rl); |
a4bd217b | 915 | void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line); |
a7689938 JG |
916 | void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line, |
917 | bool used); | |
588726d3 | 918 | int pblk_rl_is_limit(struct pblk_rl *rl); |
a4bd217b | 919 | |
48b8d208 HH |
920 | void pblk_rl_werr_line_in(struct pblk_rl *rl); |
921 | void pblk_rl_werr_line_out(struct pblk_rl *rl); | |
922 | ||
a4bd217b JG |
923 | /* |
924 | * pblk sysfs | |
925 | */ | |
926 | int pblk_sysfs_init(struct gendisk *tdisk); | |
927 | void pblk_sysfs_exit(struct gendisk *tdisk); | |
928 | ||
a4bd217b JG |
929 | static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx) |
930 | { | |
931 | return c_ctx - sizeof(struct nvm_rq); | |
932 | } | |
933 | ||
dd2a4343 JG |
934 | static inline void *emeta_to_bb(struct line_emeta *emeta) |
935 | { | |
936 | return emeta->bb_bitmap; | |
937 | } | |
938 | ||
76758390 HH |
939 | static inline void *emeta_to_wa(struct pblk_line_meta *lm, |
940 | struct line_emeta *emeta) | |
941 | { | |
942 | return emeta->bb_bitmap + lm->blk_bitmap_len; | |
943 | } | |
944 | ||
dd2a4343 JG |
945 | static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta) |
946 | { | |
947 | return ((void *)emeta + pblk->lm.emeta_len[1]); | |
948 | } | |
949 | ||
950 | static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta) | |
a4bd217b | 951 | { |
dd2a4343 | 952 | return (emeta_to_lbas(pblk, emeta) + pblk->lm.emeta_len[2]); |
a4bd217b JG |
953 | } |
954 | ||
b20ba1bc JG |
955 | static inline int pblk_line_vsc(struct pblk_line *line) |
956 | { | |
d340121e | 957 | return le32_to_cpu(*line->vsc); |
b20ba1bc JG |
958 | } |
959 | ||
cb21665c | 960 | static inline int pblk_ppa_to_line_id(struct ppa_addr p) |
a4bd217b | 961 | { |
69471513 | 962 | return p.a.blk; |
a4bd217b JG |
963 | } |
964 | ||
cb21665c JG |
965 | static inline struct pblk_line *pblk_ppa_to_line(struct pblk *pblk, |
966 | struct ppa_addr p) | |
967 | { | |
968 | return &pblk->lines[pblk_ppa_to_line_id(p)]; | |
969 | } | |
970 | ||
b1bcfda1 | 971 | static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p) |
a4bd217b | 972 | { |
69471513 | 973 | return p.a.lun * geo->num_ch + p.a.ch; |
a4bd217b JG |
974 | } |
975 | ||
b1bcfda1 JG |
976 | static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr, |
977 | u64 line_id) | |
a4bd217b | 978 | { |
3b2a3ad1 JG |
979 | struct nvm_tgt_dev *dev = pblk->dev; |
980 | struct nvm_geo *geo = &dev->geo; | |
b1bcfda1 JG |
981 | struct ppa_addr ppa; |
982 | ||
3b2a3ad1 JG |
983 | if (geo->version == NVM_OCSSD_SPEC_12) { |
984 | struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf; | |
985 | ||
986 | ppa.ppa = 0; | |
987 | ppa.g.blk = line_id; | |
988 | ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset; | |
989 | ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset; | |
990 | ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset; | |
991 | ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset; | |
992 | ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sec_offset; | |
993 | } else { | |
994 | struct pblk_addrf *uaddrf = &pblk->uaddrf; | |
995 | int secs, chnls, luns; | |
996 | ||
997 | ppa.ppa = 0; | |
998 | ||
999 | ppa.m.chk = line_id; | |
1000 | ||
1001 | paddr = div_u64_rem(paddr, uaddrf->sec_stripe, &secs); | |
1002 | ppa.m.sec = secs; | |
1003 | ||
1004 | paddr = div_u64_rem(paddr, uaddrf->ch_stripe, &chnls); | |
1005 | ppa.m.grp = chnls; | |
1006 | ||
1007 | paddr = div_u64_rem(paddr, uaddrf->lun_stripe, &luns); | |
1008 | ppa.m.pu = luns; | |
1009 | ||
1010 | ppa.m.sec += uaddrf->sec_stripe * paddr; | |
1011 | } | |
b1bcfda1 JG |
1012 | |
1013 | return ppa; | |
a4bd217b JG |
1014 | } |
1015 | ||
2cf99bbd JG |
1016 | static inline struct nvm_chk_meta *pblk_dev_ppa_to_chunk(struct pblk *pblk, |
1017 | struct ppa_addr p) | |
1018 | { | |
1019 | struct nvm_tgt_dev *dev = pblk->dev; | |
1020 | struct nvm_geo *geo = &dev->geo; | |
cb21665c | 1021 | struct pblk_line *line = pblk_ppa_to_line(pblk, p); |
2cf99bbd JG |
1022 | int pos = pblk_ppa_to_pos(geo, p); |
1023 | ||
1024 | return &line->chks[pos]; | |
1025 | } | |
1026 | ||
1027 | static inline u64 pblk_dev_ppa_to_chunk_addr(struct pblk *pblk, | |
1028 | struct ppa_addr p) | |
1029 | { | |
1030 | struct nvm_tgt_dev *dev = pblk->dev; | |
1031 | ||
1032 | return dev_to_chunk_addr(dev->parent, &pblk->addrf, p); | |
1033 | } | |
1034 | ||
b1bcfda1 JG |
1035 | static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk, |
1036 | struct ppa_addr p) | |
a4bd217b | 1037 | { |
3b2a3ad1 JG |
1038 | struct nvm_tgt_dev *dev = pblk->dev; |
1039 | struct nvm_geo *geo = &dev->geo; | |
b1bcfda1 JG |
1040 | u64 paddr; |
1041 | ||
3b2a3ad1 JG |
1042 | if (geo->version == NVM_OCSSD_SPEC_12) { |
1043 | struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf; | |
1044 | ||
1045 | paddr = (u64)p.g.ch << ppaf->ch_offset; | |
1046 | paddr |= (u64)p.g.lun << ppaf->lun_offset; | |
1047 | paddr |= (u64)p.g.pg << ppaf->pg_offset; | |
1048 | paddr |= (u64)p.g.pl << ppaf->pln_offset; | |
1049 | paddr |= (u64)p.g.sec << ppaf->sec_offset; | |
1050 | } else { | |
1051 | struct pblk_addrf *uaddrf = &pblk->uaddrf; | |
1052 | u64 secs = p.m.sec; | |
1053 | int sec_stripe; | |
1054 | ||
1055 | paddr = (u64)p.m.grp * uaddrf->sec_stripe; | |
1056 | paddr += (u64)p.m.pu * uaddrf->sec_lun_stripe; | |
1057 | ||
1058 | secs = div_u64_rem(secs, uaddrf->sec_stripe, &sec_stripe); | |
1059 | paddr += secs * uaddrf->sec_ws_stripe; | |
1060 | paddr += sec_stripe; | |
1061 | } | |
b1bcfda1 JG |
1062 | |
1063 | return paddr; | |
a4bd217b JG |
1064 | } |
1065 | ||
1066 | static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32) | |
1067 | { | |
7f985f9a | 1068 | struct nvm_tgt_dev *dev = pblk->dev; |
a4bd217b | 1069 | |
7f985f9a | 1070 | return nvm_ppa32_to_ppa64(dev->parent, &pblk->addrf, ppa32); |
a4bd217b JG |
1071 | } |
1072 | ||
a4bd217b JG |
1073 | static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64) |
1074 | { | |
7f985f9a | 1075 | struct nvm_tgt_dev *dev = pblk->dev; |
a4bd217b | 1076 | |
7f985f9a | 1077 | return nvm_ppa64_to_ppa32(dev->parent, &pblk->addrf, ppa64); |
a4bd217b JG |
1078 | } |
1079 | ||
b1bcfda1 JG |
1080 | static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk, |
1081 | sector_t lba) | |
a4bd217b | 1082 | { |
b1bcfda1 JG |
1083 | struct ppa_addr ppa; |
1084 | ||
bb845ae4 | 1085 | if (pblk->addrf_len < 32) { |
a4bd217b JG |
1086 | u32 *map = (u32 *)pblk->trans_map; |
1087 | ||
b1bcfda1 | 1088 | ppa = pblk_ppa32_to_ppa64(pblk, map[lba]); |
a4bd217b | 1089 | } else { |
b1bcfda1 | 1090 | struct ppa_addr *map = (struct ppa_addr *)pblk->trans_map; |
a4bd217b | 1091 | |
b1bcfda1 | 1092 | ppa = map[lba]; |
a4bd217b | 1093 | } |
b1bcfda1 JG |
1094 | |
1095 | return ppa; | |
a4bd217b JG |
1096 | } |
1097 | ||
b1bcfda1 JG |
1098 | static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba, |
1099 | struct ppa_addr ppa) | |
a4bd217b | 1100 | { |
bb845ae4 | 1101 | if (pblk->addrf_len < 32) { |
b1bcfda1 | 1102 | u32 *map = (u32 *)pblk->trans_map; |
a4bd217b | 1103 | |
b1bcfda1 JG |
1104 | map[lba] = pblk_ppa64_to_ppa32(pblk, ppa); |
1105 | } else { | |
1106 | u64 *map = (u64 *)pblk->trans_map; | |
a4bd217b | 1107 | |
b1bcfda1 JG |
1108 | map[lba] = ppa.ppa; |
1109 | } | |
a4bd217b JG |
1110 | } |
1111 | ||
1112 | static inline int pblk_ppa_empty(struct ppa_addr ppa_addr) | |
1113 | { | |
1114 | return (ppa_addr.ppa == ADDR_EMPTY); | |
1115 | } | |
1116 | ||
1117 | static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr) | |
1118 | { | |
1119 | ppa_addr->ppa = ADDR_EMPTY; | |
1120 | } | |
1121 | ||
07698466 JG |
1122 | static inline bool pblk_ppa_comp(struct ppa_addr lppa, struct ppa_addr rppa) |
1123 | { | |
8b7bc849 | 1124 | return (lppa.ppa == rppa.ppa); |
07698466 JG |
1125 | } |
1126 | ||
a4bd217b JG |
1127 | static inline int pblk_addr_in_cache(struct ppa_addr ppa) |
1128 | { | |
1129 | return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached); | |
1130 | } | |
1131 | ||
1132 | static inline int pblk_addr_to_cacheline(struct ppa_addr ppa) | |
1133 | { | |
1134 | return ppa.c.line; | |
1135 | } | |
1136 | ||
1137 | static inline struct ppa_addr pblk_cacheline_to_addr(int addr) | |
1138 | { | |
1139 | struct ppa_addr p; | |
1140 | ||
1141 | p.c.line = addr; | |
1142 | p.c.is_cached = 1; | |
1143 | ||
1144 | return p; | |
1145 | } | |
1146 | ||
a4bd217b | 1147 | static inline u32 pblk_calc_meta_header_crc(struct pblk *pblk, |
dd2a4343 | 1148 | struct line_header *header) |
a4bd217b JG |
1149 | { |
1150 | u32 crc = ~(u32)0; | |
1151 | ||
dd2a4343 | 1152 | crc = crc32_le(crc, (unsigned char *)header + sizeof(crc), |
a4bd217b JG |
1153 | sizeof(struct line_header) - sizeof(crc)); |
1154 | ||
1155 | return crc; | |
1156 | } | |
1157 | ||
1158 | static inline u32 pblk_calc_smeta_crc(struct pblk *pblk, | |
1159 | struct line_smeta *smeta) | |
1160 | { | |
1161 | struct pblk_line_meta *lm = &pblk->lm; | |
1162 | u32 crc = ~(u32)0; | |
1163 | ||
1164 | crc = crc32_le(crc, (unsigned char *)smeta + | |
1165 | sizeof(struct line_header) + sizeof(crc), | |
1166 | lm->smeta_len - | |
1167 | sizeof(struct line_header) - sizeof(crc)); | |
1168 | ||
1169 | return crc; | |
1170 | } | |
1171 | ||
1172 | static inline u32 pblk_calc_emeta_crc(struct pblk *pblk, | |
1173 | struct line_emeta *emeta) | |
1174 | { | |
1175 | struct pblk_line_meta *lm = &pblk->lm; | |
1176 | u32 crc = ~(u32)0; | |
1177 | ||
1178 | crc = crc32_le(crc, (unsigned char *)emeta + | |
1179 | sizeof(struct line_header) + sizeof(crc), | |
dd2a4343 | 1180 | lm->emeta_len[0] - |
a4bd217b JG |
1181 | sizeof(struct line_header) - sizeof(crc)); |
1182 | ||
1183 | return crc; | |
1184 | } | |
1185 | ||
f9c10152 | 1186 | static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs) |
a4bd217b | 1187 | { |
f9c10152 | 1188 | return !(nr_secs % pblk->min_write_pgs); |
a4bd217b JG |
1189 | } |
1190 | ||
880eda54 | 1191 | #ifdef CONFIG_NVM_PBLK_DEBUG |
4e495a46 | 1192 | static inline void print_ppa(struct pblk *pblk, struct ppa_addr *p, |
3b2a3ad1 | 1193 | char *msg, int error) |
a4bd217b | 1194 | { |
4e495a46 MB |
1195 | struct nvm_geo *geo = &pblk->dev->geo; |
1196 | ||
a4bd217b | 1197 | if (p->c.is_cached) { |
4e495a46 | 1198 | pblk_err(pblk, "ppa: (%s: %x) cache line: %llu\n", |
a4bd217b | 1199 | msg, error, (u64)p->c.line); |
3b2a3ad1 | 1200 | } else if (geo->version == NVM_OCSSD_SPEC_12) { |
4e495a46 | 1201 | pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n", |
a4bd217b JG |
1202 | msg, error, |
1203 | p->g.ch, p->g.lun, p->g.blk, | |
1204 | p->g.pg, p->g.pl, p->g.sec); | |
3b2a3ad1 | 1205 | } else { |
4e495a46 | 1206 | pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,chk:%d,sec:%d\n", |
3b2a3ad1 JG |
1207 | msg, error, |
1208 | p->m.grp, p->m.pu, p->m.chk, p->m.sec); | |
a4bd217b JG |
1209 | } |
1210 | } | |
1211 | ||
1212 | static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd, | |
1213 | int error) | |
1214 | { | |
1215 | int bit = -1; | |
1216 | ||
1217 | if (rqd->nr_ppas == 1) { | |
4e495a46 | 1218 | print_ppa(pblk, &rqd->ppa_addr, "rqd", error); |
a4bd217b JG |
1219 | return; |
1220 | } | |
1221 | ||
1222 | while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas, | |
1223 | bit + 1)) < rqd->nr_ppas) { | |
4e495a46 | 1224 | print_ppa(pblk, &rqd->ppa_list[bit], "rqd", error); |
a4bd217b JG |
1225 | } |
1226 | ||
4e495a46 | 1227 | pblk_err(pblk, "error:%d, ppa_status:%llx\n", error, rqd->ppa_status); |
a4bd217b | 1228 | } |
a4bd217b JG |
1229 | |
1230 | static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev, | |
1231 | struct ppa_addr *ppas, int nr_ppas) | |
1232 | { | |
1233 | struct nvm_geo *geo = &tgt_dev->geo; | |
1234 | struct ppa_addr *ppa; | |
1235 | int i; | |
1236 | ||
1237 | for (i = 0; i < nr_ppas; i++) { | |
1238 | ppa = &ppas[i]; | |
1239 | ||
3b2a3ad1 JG |
1240 | if (geo->version == NVM_OCSSD_SPEC_12) { |
1241 | if (!ppa->c.is_cached && | |
1242 | ppa->g.ch < geo->num_ch && | |
1243 | ppa->g.lun < geo->num_lun && | |
1244 | ppa->g.pl < geo->num_pln && | |
1245 | ppa->g.blk < geo->num_chk && | |
1246 | ppa->g.pg < geo->num_pg && | |
1247 | ppa->g.sec < geo->ws_min) | |
1248 | continue; | |
1249 | } else { | |
1250 | if (!ppa->c.is_cached && | |
1251 | ppa->m.grp < geo->num_ch && | |
1252 | ppa->m.pu < geo->num_lun && | |
1253 | ppa->m.chk < geo->num_chk && | |
1254 | ppa->m.sec < geo->clba) | |
1255 | continue; | |
1256 | } | |
1257 | ||
4e495a46 | 1258 | print_ppa(tgt_dev->q->queuedata, ppa, "boundary", i); |
1a94b2d4 | 1259 | |
a4bd217b JG |
1260 | return 1; |
1261 | } | |
1262 | return 0; | |
1263 | } | |
1264 | ||
1a94b2d4 JG |
1265 | static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd) |
1266 | { | |
1267 | struct nvm_tgt_dev *dev = pblk->dev; | |
d68a9344 | 1268 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
1a94b2d4 JG |
1269 | |
1270 | if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) { | |
1271 | WARN_ON(1); | |
1272 | return -EINVAL; | |
1273 | } | |
1274 | ||
1275 | if (rqd->opcode == NVM_OP_PWRITE) { | |
1276 | struct pblk_line *line; | |
1a94b2d4 JG |
1277 | int i; |
1278 | ||
1279 | for (i = 0; i < rqd->nr_ppas; i++) { | |
cb21665c | 1280 | line = pblk_ppa_to_line(pblk, ppa_list[i]); |
1a94b2d4 JG |
1281 | |
1282 | spin_lock(&line->lock); | |
1283 | if (line->state != PBLK_LINESTATE_OPEN) { | |
4e495a46 | 1284 | pblk_err(pblk, "bad ppa: line:%d,state:%d\n", |
1a94b2d4 JG |
1285 | line->id, line->state); |
1286 | WARN_ON(1); | |
1287 | spin_unlock(&line->lock); | |
1288 | return -EINVAL; | |
1289 | } | |
1290 | spin_unlock(&line->lock); | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | #endif | |
1297 | ||
a4bd217b JG |
1298 | static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr) |
1299 | { | |
1300 | struct pblk_line_meta *lm = &pblk->lm; | |
1301 | ||
1302 | if (paddr > lm->sec_per_line) | |
1303 | return 1; | |
1304 | ||
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | static inline unsigned int pblk_get_bi_idx(struct bio *bio) | |
1309 | { | |
1310 | return bio->bi_iter.bi_idx; | |
1311 | } | |
1312 | ||
1313 | static inline sector_t pblk_get_lba(struct bio *bio) | |
1314 | { | |
1315 | return bio->bi_iter.bi_sector / NR_PHY_IN_LOG; | |
1316 | } | |
1317 | ||
1318 | static inline unsigned int pblk_get_secs(struct bio *bio) | |
1319 | { | |
1320 | return bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE; | |
1321 | } | |
1322 | ||
4c44abf4 HH |
1323 | static inline char *pblk_disk_name(struct pblk *pblk) |
1324 | { | |
1325 | struct gendisk *disk = pblk->disk; | |
1326 | ||
1327 | return disk->disk_name; | |
1328 | } | |
3bcebc5b HH |
1329 | |
1330 | static inline unsigned int pblk_get_min_chks(struct pblk *pblk) | |
1331 | { | |
1332 | struct pblk_line_meta *lm = &pblk->lm; | |
1333 | /* In a worst-case scenario every line will have OP invalid sectors. | |
1334 | * We will then need a minimum of 1/OP lines to free up a single line | |
1335 | */ | |
1336 | ||
1337 | return DIV_ROUND_UP(100, pblk->op) * lm->blk_per_line; | |
faa79f27 | 1338 | } |
3bcebc5b | 1339 | |
faa79f27 IK |
1340 | static inline struct pblk_sec_meta *pblk_get_meta(struct pblk *pblk, |
1341 | void *meta, int index) | |
1342 | { | |
2c4d5356 IK |
1343 | return meta + |
1344 | max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size) | |
1345 | * index; | |
3bcebc5b | 1346 | } |
24828d05 IK |
1347 | |
1348 | static inline int pblk_dma_meta_size(struct pblk *pblk) | |
1349 | { | |
2c4d5356 IK |
1350 | return max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size) |
1351 | * NVM_MAX_VLBA; | |
24828d05 | 1352 | } |
55d8ec35 IK |
1353 | |
1354 | static inline int pblk_is_oob_meta_supported(struct pblk *pblk) | |
1355 | { | |
1356 | return pblk->oob_meta_size >= sizeof(struct pblk_sec_meta); | |
1357 | } | |
a4bd217b | 1358 | #endif /* PBLK_H_ */ |