Commit | Line | Data |
---|---|---|
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 | ||
46 | #define PBLK_COMMAND_TIMEOUT_MS 30000 | |
47 | ||
48 | /* Max 512 LUNs per device */ | |
49 | #define PBLK_MAX_LUNS_BITMAP (4) | |
50 | ||
51 | #define NR_PHY_IN_LOG (PBLK_EXPOSED_PAGE_SIZE / PBLK_SECTOR) | |
52 | ||
0d880398 | 53 | /* Static pool sizes */ |
b84ae4a8 JG |
54 | #define PBLK_GEN_WS_POOL_SIZE (2) |
55 | ||
e5392739 JG |
56 | #define PBLK_DEFAULT_OP (11) |
57 | ||
e2cddf20 JG |
58 | enum { |
59 | PBLK_READ = READ, | |
60 | PBLK_WRITE = WRITE,/* Write from write buffer */ | |
61 | PBLK_WRITE_INT, /* Internal write - no write buffer */ | |
8f554597 | 62 | PBLK_READ_RECOV, /* Recovery read - errors allowed */ |
e2cddf20 JG |
63 | PBLK_ERASE, |
64 | }; | |
65 | ||
a4bd217b JG |
66 | enum { |
67 | /* IO Types */ | |
68 | PBLK_IOTYPE_USER = 1 << 0, | |
69 | PBLK_IOTYPE_GC = 1 << 1, | |
70 | ||
71 | /* Write buffer flags */ | |
72 | PBLK_FLUSH_ENTRY = 1 << 2, | |
73 | PBLK_WRITTEN_DATA = 1 << 3, | |
74 | PBLK_SUBMITTED_ENTRY = 1 << 4, | |
75 | PBLK_WRITABLE_ENTRY = 1 << 5, | |
76 | }; | |
77 | ||
78 | enum { | |
79 | PBLK_BLK_ST_OPEN = 0x1, | |
80 | PBLK_BLK_ST_CLOSED = 0x2, | |
81 | }; | |
82 | ||
4209c31c HH |
83 | enum { |
84 | PBLK_CHUNK_RESET_START, | |
85 | PBLK_CHUNK_RESET_DONE, | |
86 | PBLK_CHUNK_RESET_FAILED, | |
87 | }; | |
88 | ||
b20ba1bc JG |
89 | struct pblk_sec_meta { |
90 | u64 reserved; | |
91 | __le64 lba; | |
92 | }; | |
93 | ||
a4bd217b JG |
94 | /* The number of GC lists and the rate-limiter states go together. This way the |
95 | * rate-limiter can dictate how much GC is needed based on resource utilization. | |
96 | */ | |
48b8d208 | 97 | #define PBLK_GC_NR_LISTS 4 |
a4bd217b JG |
98 | |
99 | enum { | |
48b8d208 HH |
100 | PBLK_RL_OFF = 0, |
101 | PBLK_RL_WERR = 1, | |
102 | PBLK_RL_HIGH = 2, | |
103 | PBLK_RL_MID = 3, | |
104 | PBLK_RL_LOW = 4 | |
a4bd217b JG |
105 | }; |
106 | ||
afdc23c9 | 107 | #define pblk_dma_ppa_size (sizeof(u64) * NVM_MAX_VLBA) |
a4bd217b | 108 | |
084ec9ba | 109 | /* write buffer completion context */ |
a4bd217b JG |
110 | struct pblk_c_ctx { |
111 | struct list_head list; /* Head for out-of-order completion */ | |
112 | ||
113 | unsigned long *lun_bitmap; /* Luns used on current request */ | |
114 | unsigned int sentry; | |
115 | unsigned int nr_valid; | |
116 | unsigned int nr_padded; | |
117 | }; | |
118 | ||
a4809fee | 119 | /* read context */ |
084ec9ba JG |
120 | struct pblk_g_ctx { |
121 | void *private; | |
998ba629 | 122 | unsigned long start_time; |
a4809fee | 123 | u64 lba; |
a4bd217b JG |
124 | }; |
125 | ||
11f6ad69 HL |
126 | /* partial read context */ |
127 | struct pblk_pr_ctx { | |
128 | struct bio *orig_bio; | |
129 | DECLARE_BITMAP(bitmap, NVM_MAX_VLBA); | |
130 | unsigned int orig_nr_secs; | |
131 | unsigned int bio_init_idx; | |
132 | void *ppa_ptr; | |
133 | dma_addr_t dma_ppa_list; | |
dd439496 IK |
134 | __le64 lba_list_mem[NVM_MAX_VLBA]; |
135 | __le64 lba_list_media[NVM_MAX_VLBA]; | |
11f6ad69 HL |
136 | }; |
137 | ||
ee8d5c1a JG |
138 | /* Pad context */ |
139 | struct pblk_pad_rq { | |
140 | struct pblk *pblk; | |
141 | struct completion wait; | |
142 | struct kref ref; | |
143 | }; | |
144 | ||
a4bd217b JG |
145 | /* Recovery context */ |
146 | struct pblk_rec_ctx { | |
147 | struct pblk *pblk; | |
148 | struct nvm_rq *rqd; | |
a4bd217b JG |
149 | struct work_struct ws_rec; |
150 | }; | |
151 | ||
152 | /* Write context */ | |
153 | struct pblk_w_ctx { | |
154 | struct bio_list bios; /* Original bios - used for completion | |
155 | * in REQ_FUA, REQ_FLUSH case | |
156 | */ | |
ef697902 | 157 | u64 lba; /* Logic addr. associated with entry */ |
a4bd217b JG |
158 | struct ppa_addr ppa; /* Physic addr. associated with entry */ |
159 | int flags; /* Write context flags */ | |
160 | }; | |
161 | ||
162 | struct pblk_rb_entry { | |
163 | struct ppa_addr cacheline; /* Cacheline for this entry */ | |
164 | void *data; /* Pointer to data on this entry */ | |
165 | struct pblk_w_ctx w_ctx; /* Context for this entry */ | |
166 | struct list_head index; /* List head to enable indexes */ | |
167 | }; | |
168 | ||
169 | #define EMPTY_ENTRY (~0U) | |
170 | ||
171 | struct pblk_rb_pages { | |
172 | struct page *pages; | |
173 | int order; | |
174 | struct list_head list; | |
175 | }; | |
176 | ||
177 | struct pblk_rb { | |
178 | struct pblk_rb_entry *entries; /* Ring buffer entries */ | |
179 | unsigned int mem; /* Write offset - points to next | |
180 | * writable entry in memory | |
181 | */ | |
182 | unsigned int subm; /* Read offset - points to last entry | |
183 | * that has been submitted to the media | |
184 | * to be persisted | |
185 | */ | |
186 | unsigned int sync; /* Synced - backpointer that signals | |
187 | * the last submitted entry that has | |
188 | * been successfully persisted to media | |
189 | */ | |
8154d296 | 190 | unsigned int flush_point; /* Sync point - last entry that must be |
a4bd217b JG |
191 | * flushed to the media. Used with |
192 | * REQ_FLUSH and REQ_FUA | |
193 | */ | |
194 | unsigned int l2p_update; /* l2p update point - next entry for | |
195 | * which l2p mapping will be updated to | |
196 | * contain a device ppa address (instead | |
197 | * of a cacheline | |
198 | */ | |
199 | unsigned int nr_entries; /* Number of entries in write buffer - | |
200 | * must be a power of two | |
201 | */ | |
202 | unsigned int seg_size; /* Size of the data segments being | |
203 | * stored on each entry. Typically this | |
204 | * will be 4KB | |
205 | */ | |
206 | ||
766c8ceb JG |
207 | unsigned int back_thres; /* Threshold that shall be maintained by |
208 | * the backpointer in order to respect | |
209 | * geo->mw_cunits on a per chunk basis | |
210 | */ | |
211 | ||
a4bd217b JG |
212 | struct list_head pages; /* List of data pages */ |
213 | ||
214 | spinlock_t w_lock; /* Write lock */ | |
215 | spinlock_t s_lock; /* Sync lock */ | |
216 | ||
880eda54 | 217 | #ifdef CONFIG_NVM_PBLK_DEBUG |
8154d296 | 218 | atomic_t inflight_flush_point; /* Not served REQ_FLUSH | REQ_FUA */ |
a4bd217b JG |
219 | #endif |
220 | }; | |
221 | ||
222 | #define PBLK_RECOVERY_SECTORS 16 | |
223 | ||
224 | struct pblk_lun { | |
225 | struct ppa_addr bppa; | |
a4bd217b JG |
226 | struct semaphore wr_sem; |
227 | }; | |
228 | ||
229 | struct pblk_gc_rq { | |
230 | struct pblk_line *line; | |
231 | void *data; | |
afdc23c9 MB |
232 | u64 paddr_list[NVM_MAX_VLBA]; |
233 | u64 lba_list[NVM_MAX_VLBA]; | |
a4bd217b JG |
234 | int nr_secs; |
235 | int secs_to_gc; | |
236 | struct list_head list; | |
237 | }; | |
238 | ||
239 | struct pblk_gc { | |
b20ba1bc JG |
240 | /* These states are not protected by a lock since (i) they are in the |
241 | * fast path, and (ii) they are not critical. | |
242 | */ | |
a4bd217b JG |
243 | int gc_active; |
244 | int gc_enabled; | |
245 | int gc_forced; | |
a4bd217b JG |
246 | |
247 | struct task_struct *gc_ts; | |
248 | struct task_struct *gc_writer_ts; | |
b20ba1bc JG |
249 | struct task_struct *gc_reader_ts; |
250 | ||
251 | struct workqueue_struct *gc_line_reader_wq; | |
a4bd217b | 252 | struct workqueue_struct *gc_reader_wq; |
b20ba1bc | 253 | |
a4bd217b JG |
254 | struct timer_list gc_timer; |
255 | ||
b20ba1bc | 256 | struct semaphore gc_sem; |
d6b992f7 HH |
257 | atomic_t read_inflight_gc; /* Number of lines with inflight GC reads */ |
258 | atomic_t pipeline_gc; /* Number of lines in the GC pipeline - | |
259 | * started reads to finished writes | |
260 | */ | |
a4bd217b | 261 | int w_entries; |
b20ba1bc | 262 | |
a4bd217b | 263 | struct list_head w_list; |
b20ba1bc | 264 | struct list_head r_list; |
a4bd217b JG |
265 | |
266 | spinlock_t lock; | |
267 | spinlock_t w_lock; | |
b20ba1bc | 268 | spinlock_t r_lock; |
a4bd217b JG |
269 | }; |
270 | ||
271 | struct pblk_rl { | |
272 | unsigned int high; /* Upper threshold for rate limiter (free run - | |
273 | * user I/O rate limiter | |
274 | */ | |
a4bd217b JG |
275 | unsigned int high_pw; /* High rounded up as a power of 2 */ |
276 | ||
b20ba1bc JG |
277 | #define PBLK_USER_HIGH_THRS 8 /* Begin write limit at 12% available blks */ |
278 | #define PBLK_USER_LOW_THRS 10 /* Aggressive GC at 10% available blocks */ | |
a4bd217b JG |
279 | |
280 | int rb_windows_pw; /* Number of rate windows in the write buffer | |
281 | * given as a power-of-2. This guarantees that | |
282 | * when user I/O is being rate limited, there | |
283 | * will be reserved enough space for the GC to | |
284 | * place its payload. A window is of | |
285 | * pblk->max_write_pgs size, which in NVMe is | |
286 | * 64, i.e., 256kb. | |
287 | */ | |
288 | int rb_budget; /* Total number of entries available for I/O */ | |
289 | int rb_user_max; /* Max buffer entries available for user I/O */ | |
a4bd217b JG |
290 | int rb_gc_max; /* Max buffer entries available for GC I/O */ |
291 | int rb_gc_rsv; /* Reserved buffer entries for GC I/O */ | |
292 | int rb_state; /* Rate-limiter current state */ | |
da67e68f | 293 | int rb_max_io; /* Maximum size for an I/O giving the config */ |
588726d3 JG |
294 | |
295 | atomic_t rb_user_cnt; /* User I/O buffer counter */ | |
a4bd217b | 296 | atomic_t rb_gc_cnt; /* GC I/O buffer counter */ |
588726d3 | 297 | atomic_t rb_space; /* Space limit in case of reaching capacity */ |
a4bd217b | 298 | |
b20ba1bc JG |
299 | int rsv_blocks; /* Reserved blocks for GC */ |
300 | ||
a4bd217b | 301 | int rb_user_active; |
b20ba1bc JG |
302 | int rb_gc_active; |
303 | ||
48b8d208 HH |
304 | atomic_t werr_lines; /* Number of write error lines that needs gc */ |
305 | ||
a4bd217b JG |
306 | struct timer_list u_timer; |
307 | ||
308 | unsigned long long nr_secs; | |
309 | unsigned long total_blocks; | |
a7689938 JG |
310 | |
311 | atomic_t free_blocks; /* Total number of free blocks (+ OP) */ | |
312 | atomic_t free_user_blocks; /* Number of user free blocks (no OP) */ | |
a4bd217b JG |
313 | }; |
314 | ||
a4bd217b JG |
315 | #define PBLK_LINE_EMPTY (~0U) |
316 | ||
317 | enum { | |
318 | /* Line Types */ | |
319 | PBLK_LINETYPE_FREE = 0, | |
320 | PBLK_LINETYPE_LOG = 1, | |
321 | PBLK_LINETYPE_DATA = 2, | |
322 | ||
323 | /* Line state */ | |
32ef9412 | 324 | PBLK_LINESTATE_NEW = 9, |
a4bd217b JG |
325 | PBLK_LINESTATE_FREE = 10, |
326 | PBLK_LINESTATE_OPEN = 11, | |
327 | PBLK_LINESTATE_CLOSED = 12, | |
328 | PBLK_LINESTATE_GC = 13, | |
329 | PBLK_LINESTATE_BAD = 14, | |
330 | PBLK_LINESTATE_CORRUPT = 15, | |
331 | ||
332 | /* GC group */ | |
333 | PBLK_LINEGC_NONE = 20, | |
334 | PBLK_LINEGC_EMPTY = 21, | |
335 | PBLK_LINEGC_LOW = 22, | |
336 | PBLK_LINEGC_MID = 23, | |
337 | PBLK_LINEGC_HIGH = 24, | |
338 | PBLK_LINEGC_FULL = 25, | |
48b8d208 | 339 | PBLK_LINEGC_WERR = 26 |
a4bd217b JG |
340 | }; |
341 | ||
342 | #define PBLK_MAGIC 0x70626c6b /*pblk*/ | |
d0ab0b1a HH |
343 | |
344 | /* emeta/smeta persistent storage format versions: | |
345 | * Changes in major version requires offline migration. | |
346 | * Changes in minor version are handled automatically during | |
347 | * recovery. | |
348 | */ | |
349 | ||
350 | #define SMETA_VERSION_MAJOR (0) | |
351 | #define SMETA_VERSION_MINOR (1) | |
352 | ||
353 | #define EMETA_VERSION_MAJOR (0) | |
76758390 | 354 | #define EMETA_VERSION_MINOR (2) |
a4bd217b JG |
355 | |
356 | struct line_header { | |
357 | __le32 crc; | |
358 | __le32 identifier; /* pblk identifier */ | |
359 | __u8 uuid[16]; /* instance uuid */ | |
360 | __le16 type; /* line type */ | |
d0ab0b1a HH |
361 | __u8 version_major; /* version major */ |
362 | __u8 version_minor; /* version minor */ | |
a4bd217b JG |
363 | __le32 id; /* line id for current line */ |
364 | }; | |
365 | ||
366 | struct line_smeta { | |
367 | struct line_header header; | |
368 | ||
369 | __le32 crc; /* Full structure including struct crc */ | |
370 | /* Previous line metadata */ | |
371 | __le32 prev_id; /* Line id for previous line */ | |
372 | ||
373 | /* Current line metadata */ | |
374 | __le64 seq_nr; /* Sequence number for current line */ | |
375 | ||
376 | /* Active writers */ | |
377 | __le32 window_wr_lun; /* Number of parallel LUNs to write */ | |
378 | ||
379 | __le32 rsvd[2]; | |
dd2a4343 JG |
380 | |
381 | __le64 lun_bitmap[]; | |
a4bd217b JG |
382 | }; |
383 | ||
76758390 | 384 | |
a4bd217b | 385 | /* |
dd2a4343 JG |
386 | * Metadata layout in media: |
387 | * First sector: | |
388 | * 1. struct line_emeta | |
389 | * 2. bad block bitmap (u64 * window_wr_lun) | |
76758390 | 390 | * 3. write amplification counters |
dd2a4343 JG |
391 | * Mid sectors (start at lbas_sector): |
392 | * 3. nr_lbas (u64) forming lba list | |
393 | * Last sectors (start at vsc_sector): | |
394 | * 4. u32 valid sector count (vsc) for all lines (~0U: free line) | |
a4bd217b JG |
395 | */ |
396 | struct line_emeta { | |
397 | struct line_header header; | |
398 | ||
399 | __le32 crc; /* Full structure including struct crc */ | |
400 | ||
401 | /* Previous line metadata */ | |
402 | __le32 prev_id; /* Line id for prev line */ | |
403 | ||
404 | /* Current line metadata */ | |
405 | __le64 seq_nr; /* Sequence number for current line */ | |
406 | ||
407 | /* Active writers */ | |
408 | __le32 window_wr_lun; /* Number of parallel LUNs to write */ | |
409 | ||
410 | /* Bookkeeping for recovery */ | |
411 | __le32 next_id; /* Line id for next line */ | |
412 | __le64 nr_lbas; /* Number of lbas mapped in line */ | |
413 | __le64 nr_valid_lbas; /* Number of valid lbas mapped in line */ | |
76758390 HH |
414 | __le64 bb_bitmap[]; /* Updated bad block bitmap for line */ |
415 | }; | |
416 | ||
417 | ||
418 | /* Write amplification counters stored on media */ | |
419 | struct wa_counters { | |
420 | __le64 user; /* Number of user written sectors */ | |
421 | __le64 gc; /* Number of sectors written by GC*/ | |
422 | __le64 pad; /* Number of padded sectors */ | |
dd2a4343 JG |
423 | }; |
424 | ||
425 | struct pblk_emeta { | |
426 | struct line_emeta *buf; /* emeta buffer in media format */ | |
427 | int mem; /* Write offset - points to next | |
428 | * writable entry in memory | |
429 | */ | |
430 | atomic_t sync; /* Synced - backpointer that signals the | |
431 | * last entry that has been successfully | |
432 | * persisted to media | |
433 | */ | |
434 | unsigned int nr_entries; /* Number of emeta entries */ | |
435 | }; | |
436 | ||
437 | struct pblk_smeta { | |
438 | struct line_smeta *buf; /* smeta buffer in persistent format */ | |
a4bd217b JG |
439 | }; |
440 | ||
48b8d208 HH |
441 | struct pblk_w_err_gc { |
442 | int has_write_err; | |
443 | __le64 *lba_list; | |
444 | }; | |
445 | ||
a4bd217b JG |
446 | struct pblk_line { |
447 | struct pblk *pblk; | |
448 | unsigned int id; /* Line number corresponds to the | |
449 | * block line | |
450 | */ | |
451 | unsigned int seq_nr; /* Unique line sequence number */ | |
452 | ||
453 | int state; /* PBLK_LINESTATE_X */ | |
454 | int type; /* PBLK_LINETYPE_X */ | |
455 | int gc_group; /* PBLK_LINEGC_X */ | |
456 | struct list_head list; /* Free, GC lists */ | |
457 | ||
458 | unsigned long *lun_bitmap; /* Bitmap for LUNs mapped in line */ | |
459 | ||
32ef9412 JG |
460 | struct nvm_chk_meta *chks; /* Chunks forming line */ |
461 | ||
dd2a4343 JG |
462 | struct pblk_smeta *smeta; /* Start metadata */ |
463 | struct pblk_emeta *emeta; /* End medatada */ | |
464 | ||
a4bd217b | 465 | int meta_line; /* Metadata line id */ |
dd2a4343 JG |
466 | int meta_distance; /* Distance between data and metadata */ |
467 | ||
a4bd217b JG |
468 | u64 smeta_ssec; /* Sector where smeta starts */ |
469 | u64 emeta_ssec; /* Sector where emeta starts */ | |
470 | ||
471 | unsigned int sec_in_line; /* Number of usable secs in line */ | |
472 | ||
a44f53fa | 473 | atomic_t blk_in_line; /* Number of good blocks in line */ |
a4bd217b JG |
474 | unsigned long *blk_bitmap; /* Bitmap for valid/invalid blocks */ |
475 | unsigned long *erase_bitmap; /* Bitmap for erased blocks */ | |
476 | ||
477 | unsigned long *map_bitmap; /* Bitmap for mapped sectors in line */ | |
478 | unsigned long *invalid_bitmap; /* Bitmap for invalid sectors in line */ | |
479 | ||
a44f53fa | 480 | atomic_t left_eblks; /* Blocks left for erasing */ |
a4bd217b JG |
481 | atomic_t left_seblks; /* Blocks left for sync erasing */ |
482 | ||
483 | int left_msecs; /* Sectors left for mapping */ | |
a4bd217b | 484 | unsigned int cur_sec; /* Sector map pointer */ |
dd2a4343 JG |
485 | unsigned int nr_valid_lbas; /* Number of valid lbas in line */ |
486 | ||
487 | __le32 *vsc; /* Valid sector count in line */ | |
a4bd217b JG |
488 | |
489 | struct kref ref; /* Write buffer L2P references */ | |
490 | ||
48b8d208 HH |
491 | struct pblk_w_err_gc *w_err_gc; /* Write error gc recovery metadata */ |
492 | ||
a4bd217b JG |
493 | spinlock_t lock; /* Necessary for invalid_bitmap only */ |
494 | }; | |
495 | ||
a44f53fa | 496 | #define PBLK_DATA_LINES 4 |
a4bd217b | 497 | |
dd2a4343 | 498 | enum { |
a4bd217b JG |
499 | PBLK_KMALLOC_META = 1, |
500 | PBLK_VMALLOC_META = 2, | |
501 | }; | |
502 | ||
dd2a4343 JG |
503 | enum { |
504 | PBLK_EMETA_TYPE_HEADER = 1, /* struct line_emeta first sector */ | |
505 | PBLK_EMETA_TYPE_LLBA = 2, /* lba list - type: __le64 */ | |
506 | PBLK_EMETA_TYPE_VSC = 3, /* vsc list - type: __le32 */ | |
a4bd217b JG |
507 | }; |
508 | ||
509 | struct pblk_line_mgmt { | |
510 | int nr_lines; /* Total number of full lines */ | |
511 | int nr_free_lines; /* Number of full lines in free list */ | |
512 | ||
513 | /* Free lists - use free_lock */ | |
514 | struct list_head free_list; /* Full lines ready to use */ | |
515 | struct list_head corrupt_list; /* Full lines corrupted */ | |
516 | struct list_head bad_list; /* Full lines bad */ | |
517 | ||
518 | /* GC lists - use gc_lock */ | |
b20ba1bc | 519 | struct list_head *gc_lists[PBLK_GC_NR_LISTS]; |
a4bd217b JG |
520 | struct list_head gc_high_list; /* Full lines ready to GC, high isc */ |
521 | struct list_head gc_mid_list; /* Full lines ready to GC, mid isc */ | |
522 | struct list_head gc_low_list; /* Full lines ready to GC, low isc */ | |
523 | ||
48b8d208 HH |
524 | struct list_head gc_werr_list; /* Write err recovery list */ |
525 | ||
a4bd217b JG |
526 | struct list_head gc_full_list; /* Full lines ready to GC, no valid */ |
527 | struct list_head gc_empty_list; /* Full lines close, all valid */ | |
528 | ||
529 | struct pblk_line *log_line; /* Current FTL log line */ | |
530 | struct pblk_line *data_line; /* Current data line */ | |
531 | struct pblk_line *log_next; /* Next FTL log line */ | |
532 | struct pblk_line *data_next; /* Next data line */ | |
533 | ||
dd2a4343 JG |
534 | struct list_head emeta_list; /* Lines queued to schedule emeta */ |
535 | ||
536 | __le32 *vsc_list; /* Valid sector counts for all lines */ | |
537 | ||
a4bd217b | 538 | /* Metadata allocation type: VMALLOC | KMALLOC */ |
a4bd217b JG |
539 | int emeta_alloc_type; |
540 | ||
541 | /* Pre-allocated metadata for data lines */ | |
dd2a4343 JG |
542 | struct pblk_smeta *sline_meta[PBLK_DATA_LINES]; |
543 | struct pblk_emeta *eline_meta[PBLK_DATA_LINES]; | |
a4bd217b JG |
544 | unsigned long meta_bitmap; |
545 | ||
53d82db6 HH |
546 | /* Cache and mempool for map/invalid bitmaps */ |
547 | struct kmem_cache *bitmap_cache; | |
548 | mempool_t *bitmap_pool; | |
549 | ||
a4bd217b JG |
550 | /* Helpers for fast bitmap calculations */ |
551 | unsigned long *bb_template; | |
552 | unsigned long *bb_aux; | |
553 | ||
554 | unsigned long d_seq_nr; /* Data line unique sequence number */ | |
555 | unsigned long l_seq_nr; /* Log line unique sequence number */ | |
556 | ||
557 | spinlock_t free_lock; | |
dd2a4343 | 558 | spinlock_t close_lock; |
a4bd217b JG |
559 | spinlock_t gc_lock; |
560 | }; | |
561 | ||
562 | struct pblk_line_meta { | |
563 | unsigned int smeta_len; /* Total length for smeta */ | |
dd2a4343 JG |
564 | unsigned int smeta_sec; /* Sectors needed for smeta */ |
565 | ||
566 | unsigned int emeta_len[4]; /* Lengths for emeta: | |
76758390 HH |
567 | * [0]: Total |
568 | * [1]: struct line_emeta + | |
569 | * bb_bitmap + struct wa_counters | |
570 | * [2]: L2P portion | |
571 | * [3]: vsc | |
dd2a4343 JG |
572 | */ |
573 | unsigned int emeta_sec[4]; /* Sectors needed for emeta. Same layout | |
574 | * as emeta_len | |
575 | */ | |
576 | ||
a4bd217b | 577 | unsigned int emeta_bb; /* Boundary for bb that affects emeta */ |
dd2a4343 JG |
578 | |
579 | unsigned int vsc_list_len; /* Length for vsc list */ | |
a4bd217b JG |
580 | unsigned int sec_bitmap_len; /* Length for sector bitmap in line */ |
581 | unsigned int blk_bitmap_len; /* Length for block bitmap in line */ | |
582 | unsigned int lun_bitmap_len; /* Length for lun bitmap in line */ | |
583 | ||
584 | unsigned int blk_per_line; /* Number of blocks in a full line */ | |
585 | unsigned int sec_per_line; /* Number of sectors in a line */ | |
dd2a4343 | 586 | unsigned int dsec_per_line; /* Number of data sectors in a line */ |
a4bd217b JG |
587 | unsigned int min_blk_line; /* Min. number of good blocks in line */ |
588 | ||
589 | unsigned int mid_thrs; /* Threshold for GC mid list */ | |
590 | unsigned int high_thrs; /* Threshold for GC high list */ | |
dd2a4343 JG |
591 | |
592 | unsigned int meta_distance; /* Distance between data and metadata */ | |
a4bd217b JG |
593 | }; |
594 | ||
588726d3 JG |
595 | enum { |
596 | PBLK_STATE_RUNNING = 0, | |
597 | PBLK_STATE_STOPPING = 1, | |
598 | PBLK_STATE_RECOVERING = 2, | |
599 | PBLK_STATE_STOPPED = 3, | |
600 | }; | |
601 | ||
3b2a3ad1 JG |
602 | /* Internal format to support not power-of-2 device formats */ |
603 | struct pblk_addrf { | |
604 | /* gen to dev */ | |
605 | int sec_stripe; | |
606 | int ch_stripe; | |
607 | int lun_stripe; | |
608 | ||
609 | /* dev to gen */ | |
610 | int sec_lun_stripe; | |
611 | int sec_ws_stripe; | |
612 | }; | |
613 | ||
a4bd217b JG |
614 | struct pblk { |
615 | struct nvm_tgt_dev *dev; | |
616 | struct gendisk *disk; | |
617 | ||
618 | struct kobject kobj; | |
619 | ||
620 | struct pblk_lun *luns; | |
621 | ||
622 | struct pblk_line *lines; /* Line array */ | |
623 | struct pblk_line_mgmt l_mg; /* Line management */ | |
624 | struct pblk_line_meta lm; /* Line metadata */ | |
625 | ||
3b2a3ad1 JG |
626 | struct nvm_addrf addrf; /* Aligned address format */ |
627 | struct pblk_addrf uaddrf; /* Unaligned address format */ | |
bb845ae4 | 628 | int addrf_len; |
a4bd217b JG |
629 | |
630 | struct pblk_rb rwb; | |
631 | ||
588726d3 JG |
632 | int state; /* pblk line state */ |
633 | ||
a4bd217b | 634 | int min_write_pgs; /* Minimum amount of pages required by controller */ |
55d8ec35 | 635 | int min_write_pgs_data; /* Minimum amount of payload pages */ |
a4bd217b | 636 | int max_write_pgs; /* Maximum amount of pages supported by controller */ |
faa79f27 | 637 | int oob_meta_size; /* Size of OOB sector metadata */ |
a4bd217b JG |
638 | |
639 | sector_t capacity; /* Device capacity when bad blocks are subtracted */ | |
a7689938 JG |
640 | |
641 | int op; /* Percentage of device used for over-provisioning */ | |
642 | int op_blks; /* Number of blocks used for over-provisioning */ | |
a4bd217b JG |
643 | |
644 | /* pblk provisioning values. Used by rate limiter */ | |
645 | struct pblk_rl rl; | |
646 | ||
c2e9f5d4 | 647 | int sec_per_write; |
a4bd217b JG |
648 | |
649 | unsigned char instance_uuid[16]; | |
76758390 HH |
650 | |
651 | /* Persistent write amplification counters, 4kb sector I/Os */ | |
652 | atomic64_t user_wa; /* Sectors written by user */ | |
653 | atomic64_t gc_wa; /* Sectors written by GC */ | |
654 | atomic64_t pad_wa; /* Padded sectors written */ | |
655 | ||
656 | /* Reset values for delta write amplification measurements */ | |
657 | u64 user_rst_wa; | |
658 | u64 gc_rst_wa; | |
659 | u64 pad_rst_wa; | |
660 | ||
5d149bfa HH |
661 | /* Counters used for calculating padding distribution */ |
662 | atomic64_t *pad_dist; /* Padding distribution buckets */ | |
663 | u64 nr_flush_rst; /* Flushes reset value for pad dist.*/ | |
664 | atomic64_t nr_flush; /* Number of flush/fua I/O */ | |
665 | ||
880eda54 | 666 | #ifdef CONFIG_NVM_PBLK_DEBUG |
76758390 | 667 | /* Non-persistent debug counters, 4kb sector I/Os */ |
a4bd217b JG |
668 | atomic_long_t inflight_writes; /* Inflight writes (user and gc) */ |
669 | atomic_long_t padded_writes; /* Sectors padded due to flush/fua */ | |
670 | atomic_long_t padded_wb; /* Sectors padded in write buffer */ | |
a4bd217b JG |
671 | atomic_long_t req_writes; /* Sectors stored on write buffer */ |
672 | atomic_long_t sub_writes; /* Sectors submitted from buffer */ | |
673 | atomic_long_t sync_writes; /* Sectors synced to media */ | |
a4bd217b | 674 | atomic_long_t inflight_reads; /* Inflight sector read requests */ |
db7ada33 | 675 | atomic_long_t cache_reads; /* Read requests that hit the cache */ |
a4bd217b JG |
676 | atomic_long_t sync_reads; /* Completed sector read requests */ |
677 | atomic_long_t recov_writes; /* Sectors submitted from recovery */ | |
678 | atomic_long_t recov_gc_writes; /* Sectors submitted from write GC */ | |
679 | atomic_long_t recov_gc_reads; /* Sectors submitted from read GC */ | |
680 | #endif | |
681 | ||
682 | spinlock_t lock; | |
683 | ||
684 | atomic_long_t read_failed; | |
685 | atomic_long_t read_empty; | |
686 | atomic_long_t read_high_ecc; | |
687 | atomic_long_t read_failed_gc; | |
688 | atomic_long_t write_failed; | |
689 | atomic_long_t erase_failed; | |
690 | ||
588726d3 JG |
691 | atomic_t inflight_io; /* General inflight I/O counter */ |
692 | ||
a4bd217b JG |
693 | struct task_struct *writer_ts; |
694 | ||
695 | /* Simple translation map of logical addresses to physical addresses. | |
696 | * The logical addresses is known by the host system, while the physical | |
697 | * addresses are used when writing to the disk block device. | |
698 | */ | |
699 | unsigned char *trans_map; | |
700 | spinlock_t trans_lock; | |
701 | ||
702 | struct list_head compl_list; | |
703 | ||
6a3abf5b HH |
704 | spinlock_t resubmit_lock; /* Resubmit list lock */ |
705 | struct list_head resubmit_list; /* Resubmit list for failed writes*/ | |
706 | ||
b906bbb6 KO |
707 | mempool_t page_bio_pool; |
708 | mempool_t gen_ws_pool; | |
709 | mempool_t rec_pool; | |
710 | mempool_t r_rq_pool; | |
711 | mempool_t w_rq_pool; | |
712 | mempool_t e_rq_pool; | |
a4bd217b | 713 | |
ef576494 JG |
714 | struct workqueue_struct *close_wq; |
715 | struct workqueue_struct *bb_wq; | |
7bd4d370 | 716 | struct workqueue_struct *r_end_wq; |
ef576494 | 717 | |
a4bd217b JG |
718 | struct timer_list wtimer; |
719 | ||
720 | struct pblk_gc gc; | |
721 | }; | |
722 | ||
723 | struct pblk_line_ws { | |
724 | struct pblk *pblk; | |
725 | struct pblk_line *line; | |
726 | void *priv; | |
727 | struct work_struct ws; | |
728 | }; | |
729 | ||
084ec9ba | 730 | #define pblk_g_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_g_ctx)) |
a4bd217b JG |
731 | #define pblk_w_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_c_ctx)) |
732 | ||
4e495a46 MB |
733 | #define pblk_err(pblk, fmt, ...) \ |
734 | pr_err("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__) | |
735 | #define pblk_info(pblk, fmt, ...) \ | |
736 | pr_info("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__) | |
737 | #define pblk_warn(pblk, fmt, ...) \ | |
738 | pr_warn("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__) | |
739 | #define pblk_debug(pblk, fmt, ...) \ | |
740 | pr_debug("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__) | |
741 | ||
a4bd217b JG |
742 | /* |
743 | * pblk ring buffer operations | |
744 | */ | |
766c8ceb JG |
745 | int pblk_rb_init(struct pblk_rb *rb, unsigned int size, unsigned int threshold, |
746 | unsigned int seg_sz); | |
a4bd217b JG |
747 | int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio, |
748 | unsigned int nr_entries, unsigned int *pos); | |
749 | int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries, | |
750 | unsigned int *pos); | |
751 | void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data, | |
752 | struct pblk_w_ctx w_ctx, unsigned int pos); | |
753 | void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data, | |
d340121e JG |
754 | struct pblk_w_ctx w_ctx, struct pblk_line *line, |
755 | u64 paddr, unsigned int pos); | |
a4bd217b | 756 | struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos); |
588726d3 | 757 | void pblk_rb_flush(struct pblk_rb *rb); |
a4bd217b JG |
758 | |
759 | void pblk_rb_sync_l2p(struct pblk_rb *rb); | |
d624f371 | 760 | unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd, |
875d94f3 JG |
761 | unsigned int pos, unsigned int nr_entries, |
762 | unsigned int count); | |
a4bd217b | 763 | int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba, |
75cb8e93 | 764 | struct ppa_addr ppa, int bio_iter, bool advanced_bio); |
a4bd217b JG |
765 | unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries); |
766 | ||
767 | unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags); | |
768 | unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries); | |
40b8657d JG |
769 | unsigned int pblk_rb_ptr_wrap(struct pblk_rb *rb, unsigned int p, |
770 | unsigned int nr_entries); | |
a4bd217b | 771 | void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags); |
8154d296 | 772 | unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb); |
a4bd217b JG |
773 | |
774 | unsigned int pblk_rb_read_count(struct pblk_rb *rb); | |
ee8d5c1a | 775 | unsigned int pblk_rb_sync_count(struct pblk_rb *rb); |
a4bd217b JG |
776 | unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos); |
777 | ||
778 | int pblk_rb_tear_down_check(struct pblk_rb *rb); | |
779 | int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos); | |
9bd1f875 | 780 | void pblk_rb_free(struct pblk_rb *rb); |
a4bd217b JG |
781 | ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf); |
782 | ||
783 | /* | |
784 | * pblk core | |
785 | */ | |
67bf26a3 JG |
786 | struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type); |
787 | void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type); | |
45dcf29b JG |
788 | int pblk_alloc_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd); |
789 | void pblk_free_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd); | |
c2e9f5d4 | 790 | void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write); |
a4bd217b JG |
791 | int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd, |
792 | struct pblk_c_ctx *c_ctx); | |
a4bd217b | 793 | void pblk_discard(struct pblk *pblk, struct bio *bio); |
aff3fb18 | 794 | struct nvm_chk_meta *pblk_get_chunk_meta(struct pblk *pblk); |
32ef9412 JG |
795 | struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk, |
796 | struct nvm_chk_meta *lp, | |
797 | struct ppa_addr ppa); | |
a4bd217b JG |
798 | void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd); |
799 | void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd); | |
800 | int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd); | |
1a94b2d4 | 801 | int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd); |
253babc3 | 802 | int pblk_submit_io_sync_sem(struct pblk *pblk, struct nvm_rq *rqd); |
dd2a4343 | 803 | int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line); |
4c44abf4 | 804 | void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd); |
a4bd217b JG |
805 | struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data, |
806 | unsigned int nr_secs, unsigned int len, | |
de54e703 | 807 | int alloc_type, gfp_t gfp_mask); |
a4bd217b JG |
808 | struct pblk_line *pblk_line_get(struct pblk *pblk); |
809 | struct pblk_line *pblk_line_get_first_data(struct pblk *pblk); | |
21d22871 | 810 | struct pblk_line *pblk_line_replace_data(struct pblk *pblk); |
ae14cc04 MB |
811 | void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa); |
812 | void pblk_rq_to_line_put(struct pblk *pblk, struct nvm_rq *rqd); | |
a4bd217b JG |
813 | int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line); |
814 | void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line); | |
815 | struct pblk_line *pblk_line_get_data(struct pblk *pblk); | |
d624f371 | 816 | struct pblk_line *pblk_line_get_erase(struct pblk *pblk); |
a4bd217b JG |
817 | int pblk_line_erase(struct pblk *pblk, struct pblk_line *line); |
818 | int pblk_line_is_full(struct pblk_line *line); | |
8e55c07b | 819 | void pblk_line_free(struct pblk_line *line); |
dd2a4343 | 820 | void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line); |
a4bd217b | 821 | void pblk_line_close(struct pblk *pblk, struct pblk_line *line); |
dd2a4343 | 822 | void pblk_line_close_ws(struct work_struct *work); |
588726d3 | 823 | void pblk_pipeline_stop(struct pblk *pblk); |
a7c9e910 JG |
824 | void __pblk_pipeline_stop(struct pblk *pblk); |
825 | void __pblk_pipeline_flush(struct pblk *pblk); | |
b84ae4a8 JG |
826 | void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv, |
827 | void (*work)(struct work_struct *), gfp_t gfp_mask, | |
828 | struct workqueue_struct *wq); | |
a4bd217b | 829 | u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line); |
af3fac16 JG |
830 | int pblk_line_smeta_read(struct pblk *pblk, struct pblk_line *line); |
831 | int pblk_line_emeta_read(struct pblk *pblk, struct pblk_line *line, | |
dd2a4343 | 832 | void *emeta_buf); |
a4bd217b JG |
833 | int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa); |
834 | void pblk_line_put(struct kref *ref); | |
7bd4d370 | 835 | void pblk_line_put_wq(struct kref *ref); |
a4bd217b | 836 | struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line); |
dd2a4343 JG |
837 | u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line); |
838 | void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); | |
a4bd217b | 839 | u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); |
dd2a4343 | 840 | u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); |
a4bd217b | 841 | int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail, |
55d8ec35 | 842 | unsigned long secs_to_flush, bool skip_meta); |
43241cfe | 843 | void pblk_down_rq(struct pblk *pblk, struct ppa_addr ppa, |
a4bd217b | 844 | unsigned long *lun_bitmap); |
43241cfe MB |
845 | void pblk_down_chunk(struct pblk *pblk, struct ppa_addr ppa); |
846 | void pblk_up_chunk(struct pblk *pblk, struct ppa_addr ppa); | |
e99e802f | 847 | void pblk_up_rq(struct pblk *pblk, unsigned long *lun_bitmap); |
a4bd217b JG |
848 | int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, |
849 | int nr_pages); | |
a4bd217b JG |
850 | void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, |
851 | int nr_pages); | |
852 | void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa); | |
0880a9aa JG |
853 | void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, |
854 | u64 paddr); | |
a4bd217b JG |
855 | void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa); |
856 | void pblk_update_map_cache(struct pblk *pblk, sector_t lba, | |
857 | struct ppa_addr ppa); | |
858 | void pblk_update_map_dev(struct pblk *pblk, sector_t lba, | |
859 | struct ppa_addr ppa, struct ppa_addr entry_line); | |
860 | int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa, | |
d340121e | 861 | struct pblk_line *gc_line, u64 paddr); |
a4bd217b JG |
862 | void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas, |
863 | u64 *lba_list, int nr_secs); | |
864 | void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas, | |
865 | sector_t blba, int nr_secs); | |
55d8ec35 IK |
866 | void *pblk_get_meta_for_writes(struct pblk *pblk, struct nvm_rq *rqd); |
867 | void pblk_get_packed_meta(struct pblk *pblk, struct nvm_rq *rqd); | |
a4bd217b JG |
868 | |
869 | /* | |
870 | * pblk user I/O write path | |
871 | */ | |
872 | int pblk_write_to_cache(struct pblk *pblk, struct bio *bio, | |
873 | unsigned long flags); | |
d340121e | 874 | int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq); |
a4bd217b JG |
875 | |
876 | /* | |
877 | * pblk map | |
878 | */ | |
525f7bb2 | 879 | int pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd, |
a4bd217b JG |
880 | unsigned int sentry, unsigned long *lun_bitmap, |
881 | unsigned int valid_secs, struct ppa_addr *erase_ppa); | |
525f7bb2 | 882 | int pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry, |
a4bd217b JG |
883 | unsigned long *lun_bitmap, unsigned int valid_secs, |
884 | unsigned int off); | |
885 | ||
886 | /* | |
887 | * pblk write thread | |
888 | */ | |
889 | int pblk_write_ts(void *data); | |
87c1d2d3 | 890 | void pblk_write_timer_fn(struct timer_list *t); |
a4bd217b | 891 | void pblk_write_should_kick(struct pblk *pblk); |
cc9c9a00 | 892 | void pblk_write_kick(struct pblk *pblk); |
a4bd217b JG |
893 | |
894 | /* | |
895 | * pblk read path | |
896 | */ | |
b906bbb6 | 897 | extern struct bio_set pblk_bio_set; |
a4bd217b | 898 | int pblk_submit_read(struct pblk *pblk, struct bio *bio); |
d340121e | 899 | int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq); |
a4bd217b JG |
900 | /* |
901 | * pblk recovery | |
902 | */ | |
a4bd217b | 903 | struct pblk_line *pblk_recov_l2p(struct pblk *pblk); |
588726d3 | 904 | int pblk_recov_pad(struct pblk *pblk); |
06bc072b | 905 | int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta); |
a4bd217b JG |
906 | |
907 | /* | |
908 | * pblk gc | |
909 | */ | |
b20ba1bc | 910 | #define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */ |
3627896a | 911 | #define PBLK_GC_RQ_QD 128 /* Queue depth for inflight GC requests */ |
b20ba1bc | 912 | #define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */ |
a4bd217b JG |
913 | |
914 | int pblk_gc_init(struct pblk *pblk); | |
a7c9e910 | 915 | void pblk_gc_exit(struct pblk *pblk, bool graceful); |
a4bd217b JG |
916 | void pblk_gc_should_start(struct pblk *pblk); |
917 | void pblk_gc_should_stop(struct pblk *pblk); | |
03661b5f | 918 | void pblk_gc_should_kick(struct pblk *pblk); |
37ce33d5 | 919 | void pblk_gc_free_full_lines(struct pblk *pblk); |
a4bd217b JG |
920 | void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled, |
921 | int *gc_active); | |
b20ba1bc | 922 | int pblk_gc_sysfs_force(struct pblk *pblk, int force); |
a4bd217b JG |
923 | |
924 | /* | |
925 | * pblk rate limiter | |
926 | */ | |
927 | void pblk_rl_init(struct pblk_rl *rl, int budget); | |
928 | void pblk_rl_free(struct pblk_rl *rl); | |
03661b5f | 929 | void pblk_rl_update_rates(struct pblk_rl *rl); |
b20ba1bc | 930 | int pblk_rl_high_thrs(struct pblk_rl *rl); |
a4bd217b | 931 | unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl); |
a7689938 | 932 | unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl); |
a4bd217b | 933 | int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries); |
588726d3 | 934 | void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries); |
a4bd217b JG |
935 | void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries); |
936 | int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries); | |
937 | void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries); | |
938 | void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc); | |
da67e68f | 939 | int pblk_rl_max_io(struct pblk_rl *rl); |
a4bd217b | 940 | void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line); |
a7689938 JG |
941 | void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line, |
942 | bool used); | |
588726d3 | 943 | int pblk_rl_is_limit(struct pblk_rl *rl); |
a4bd217b | 944 | |
48b8d208 HH |
945 | void pblk_rl_werr_line_in(struct pblk_rl *rl); |
946 | void pblk_rl_werr_line_out(struct pblk_rl *rl); | |
947 | ||
a4bd217b JG |
948 | /* |
949 | * pblk sysfs | |
950 | */ | |
951 | int pblk_sysfs_init(struct gendisk *tdisk); | |
952 | void pblk_sysfs_exit(struct gendisk *tdisk); | |
953 | ||
954 | static inline void *pblk_malloc(size_t size, int type, gfp_t flags) | |
955 | { | |
956 | if (type == PBLK_KMALLOC_META) | |
957 | return kmalloc(size, flags); | |
958 | return vmalloc(size); | |
959 | } | |
960 | ||
961 | static inline void pblk_mfree(void *ptr, int type) | |
962 | { | |
963 | if (type == PBLK_KMALLOC_META) | |
964 | kfree(ptr); | |
965 | else | |
966 | vfree(ptr); | |
967 | } | |
968 | ||
969 | static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx) | |
970 | { | |
971 | return c_ctx - sizeof(struct nvm_rq); | |
972 | } | |
973 | ||
dd2a4343 JG |
974 | static inline void *emeta_to_bb(struct line_emeta *emeta) |
975 | { | |
976 | return emeta->bb_bitmap; | |
977 | } | |
978 | ||
76758390 HH |
979 | static inline void *emeta_to_wa(struct pblk_line_meta *lm, |
980 | struct line_emeta *emeta) | |
981 | { | |
982 | return emeta->bb_bitmap + lm->blk_bitmap_len; | |
983 | } | |
984 | ||
dd2a4343 JG |
985 | static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta) |
986 | { | |
987 | return ((void *)emeta + pblk->lm.emeta_len[1]); | |
988 | } | |
989 | ||
990 | static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta) | |
a4bd217b | 991 | { |
dd2a4343 | 992 | return (emeta_to_lbas(pblk, emeta) + pblk->lm.emeta_len[2]); |
a4bd217b JG |
993 | } |
994 | ||
b20ba1bc JG |
995 | static inline int pblk_line_vsc(struct pblk_line *line) |
996 | { | |
d340121e | 997 | return le32_to_cpu(*line->vsc); |
b20ba1bc JG |
998 | } |
999 | ||
cb21665c | 1000 | static inline int pblk_ppa_to_line_id(struct ppa_addr p) |
a4bd217b | 1001 | { |
69471513 | 1002 | return p.a.blk; |
a4bd217b JG |
1003 | } |
1004 | ||
cb21665c JG |
1005 | static inline struct pblk_line *pblk_ppa_to_line(struct pblk *pblk, |
1006 | struct ppa_addr p) | |
1007 | { | |
1008 | return &pblk->lines[pblk_ppa_to_line_id(p)]; | |
1009 | } | |
1010 | ||
b1bcfda1 | 1011 | static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p) |
a4bd217b | 1012 | { |
69471513 | 1013 | return p.a.lun * geo->num_ch + p.a.ch; |
a4bd217b JG |
1014 | } |
1015 | ||
b1bcfda1 JG |
1016 | static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr, |
1017 | u64 line_id) | |
a4bd217b | 1018 | { |
3b2a3ad1 JG |
1019 | struct nvm_tgt_dev *dev = pblk->dev; |
1020 | struct nvm_geo *geo = &dev->geo; | |
b1bcfda1 JG |
1021 | struct ppa_addr ppa; |
1022 | ||
3b2a3ad1 JG |
1023 | if (geo->version == NVM_OCSSD_SPEC_12) { |
1024 | struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf; | |
1025 | ||
1026 | ppa.ppa = 0; | |
1027 | ppa.g.blk = line_id; | |
1028 | ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset; | |
1029 | ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset; | |
1030 | ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset; | |
1031 | ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset; | |
1032 | ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sec_offset; | |
1033 | } else { | |
1034 | struct pblk_addrf *uaddrf = &pblk->uaddrf; | |
1035 | int secs, chnls, luns; | |
1036 | ||
1037 | ppa.ppa = 0; | |
1038 | ||
1039 | ppa.m.chk = line_id; | |
1040 | ||
1041 | paddr = div_u64_rem(paddr, uaddrf->sec_stripe, &secs); | |
1042 | ppa.m.sec = secs; | |
1043 | ||
1044 | paddr = div_u64_rem(paddr, uaddrf->ch_stripe, &chnls); | |
1045 | ppa.m.grp = chnls; | |
1046 | ||
1047 | paddr = div_u64_rem(paddr, uaddrf->lun_stripe, &luns); | |
1048 | ppa.m.pu = luns; | |
1049 | ||
1050 | ppa.m.sec += uaddrf->sec_stripe * paddr; | |
1051 | } | |
b1bcfda1 JG |
1052 | |
1053 | return ppa; | |
a4bd217b JG |
1054 | } |
1055 | ||
2cf99bbd JG |
1056 | static inline struct nvm_chk_meta *pblk_dev_ppa_to_chunk(struct pblk *pblk, |
1057 | struct ppa_addr p) | |
1058 | { | |
1059 | struct nvm_tgt_dev *dev = pblk->dev; | |
1060 | struct nvm_geo *geo = &dev->geo; | |
cb21665c | 1061 | struct pblk_line *line = pblk_ppa_to_line(pblk, p); |
2cf99bbd JG |
1062 | int pos = pblk_ppa_to_pos(geo, p); |
1063 | ||
1064 | return &line->chks[pos]; | |
1065 | } | |
1066 | ||
1067 | static inline u64 pblk_dev_ppa_to_chunk_addr(struct pblk *pblk, | |
1068 | struct ppa_addr p) | |
1069 | { | |
1070 | struct nvm_tgt_dev *dev = pblk->dev; | |
1071 | ||
1072 | return dev_to_chunk_addr(dev->parent, &pblk->addrf, p); | |
1073 | } | |
1074 | ||
b1bcfda1 JG |
1075 | static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk, |
1076 | struct ppa_addr p) | |
a4bd217b | 1077 | { |
3b2a3ad1 JG |
1078 | struct nvm_tgt_dev *dev = pblk->dev; |
1079 | struct nvm_geo *geo = &dev->geo; | |
b1bcfda1 JG |
1080 | u64 paddr; |
1081 | ||
3b2a3ad1 JG |
1082 | if (geo->version == NVM_OCSSD_SPEC_12) { |
1083 | struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf; | |
1084 | ||
1085 | paddr = (u64)p.g.ch << ppaf->ch_offset; | |
1086 | paddr |= (u64)p.g.lun << ppaf->lun_offset; | |
1087 | paddr |= (u64)p.g.pg << ppaf->pg_offset; | |
1088 | paddr |= (u64)p.g.pl << ppaf->pln_offset; | |
1089 | paddr |= (u64)p.g.sec << ppaf->sec_offset; | |
1090 | } else { | |
1091 | struct pblk_addrf *uaddrf = &pblk->uaddrf; | |
1092 | u64 secs = p.m.sec; | |
1093 | int sec_stripe; | |
1094 | ||
1095 | paddr = (u64)p.m.grp * uaddrf->sec_stripe; | |
1096 | paddr += (u64)p.m.pu * uaddrf->sec_lun_stripe; | |
1097 | ||
1098 | secs = div_u64_rem(secs, uaddrf->sec_stripe, &sec_stripe); | |
1099 | paddr += secs * uaddrf->sec_ws_stripe; | |
1100 | paddr += sec_stripe; | |
1101 | } | |
b1bcfda1 JG |
1102 | |
1103 | return paddr; | |
a4bd217b JG |
1104 | } |
1105 | ||
1106 | static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32) | |
1107 | { | |
7f985f9a | 1108 | struct nvm_tgt_dev *dev = pblk->dev; |
a4bd217b | 1109 | |
7f985f9a | 1110 | return nvm_ppa32_to_ppa64(dev->parent, &pblk->addrf, ppa32); |
a4bd217b JG |
1111 | } |
1112 | ||
a4bd217b JG |
1113 | static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64) |
1114 | { | |
7f985f9a | 1115 | struct nvm_tgt_dev *dev = pblk->dev; |
a4bd217b | 1116 | |
7f985f9a | 1117 | return nvm_ppa64_to_ppa32(dev->parent, &pblk->addrf, ppa64); |
a4bd217b JG |
1118 | } |
1119 | ||
b1bcfda1 JG |
1120 | static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk, |
1121 | sector_t lba) | |
a4bd217b | 1122 | { |
b1bcfda1 JG |
1123 | struct ppa_addr ppa; |
1124 | ||
bb845ae4 | 1125 | if (pblk->addrf_len < 32) { |
a4bd217b JG |
1126 | u32 *map = (u32 *)pblk->trans_map; |
1127 | ||
b1bcfda1 | 1128 | ppa = pblk_ppa32_to_ppa64(pblk, map[lba]); |
a4bd217b | 1129 | } else { |
b1bcfda1 | 1130 | struct ppa_addr *map = (struct ppa_addr *)pblk->trans_map; |
a4bd217b | 1131 | |
b1bcfda1 | 1132 | ppa = map[lba]; |
a4bd217b | 1133 | } |
b1bcfda1 JG |
1134 | |
1135 | return ppa; | |
a4bd217b JG |
1136 | } |
1137 | ||
b1bcfda1 JG |
1138 | static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba, |
1139 | struct ppa_addr ppa) | |
a4bd217b | 1140 | { |
bb845ae4 | 1141 | if (pblk->addrf_len < 32) { |
b1bcfda1 | 1142 | u32 *map = (u32 *)pblk->trans_map; |
a4bd217b | 1143 | |
b1bcfda1 JG |
1144 | map[lba] = pblk_ppa64_to_ppa32(pblk, ppa); |
1145 | } else { | |
1146 | u64 *map = (u64 *)pblk->trans_map; | |
a4bd217b | 1147 | |
b1bcfda1 JG |
1148 | map[lba] = ppa.ppa; |
1149 | } | |
a4bd217b JG |
1150 | } |
1151 | ||
1152 | static inline int pblk_ppa_empty(struct ppa_addr ppa_addr) | |
1153 | { | |
1154 | return (ppa_addr.ppa == ADDR_EMPTY); | |
1155 | } | |
1156 | ||
1157 | static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr) | |
1158 | { | |
1159 | ppa_addr->ppa = ADDR_EMPTY; | |
1160 | } | |
1161 | ||
07698466 JG |
1162 | static inline bool pblk_ppa_comp(struct ppa_addr lppa, struct ppa_addr rppa) |
1163 | { | |
8b7bc849 | 1164 | return (lppa.ppa == rppa.ppa); |
07698466 JG |
1165 | } |
1166 | ||
a4bd217b JG |
1167 | static inline int pblk_addr_in_cache(struct ppa_addr ppa) |
1168 | { | |
1169 | return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached); | |
1170 | } | |
1171 | ||
1172 | static inline int pblk_addr_to_cacheline(struct ppa_addr ppa) | |
1173 | { | |
1174 | return ppa.c.line; | |
1175 | } | |
1176 | ||
1177 | static inline struct ppa_addr pblk_cacheline_to_addr(int addr) | |
1178 | { | |
1179 | struct ppa_addr p; | |
1180 | ||
1181 | p.c.line = addr; | |
1182 | p.c.is_cached = 1; | |
1183 | ||
1184 | return p; | |
1185 | } | |
1186 | ||
a4bd217b | 1187 | static inline u32 pblk_calc_meta_header_crc(struct pblk *pblk, |
dd2a4343 | 1188 | struct line_header *header) |
a4bd217b JG |
1189 | { |
1190 | u32 crc = ~(u32)0; | |
1191 | ||
dd2a4343 | 1192 | crc = crc32_le(crc, (unsigned char *)header + sizeof(crc), |
a4bd217b JG |
1193 | sizeof(struct line_header) - sizeof(crc)); |
1194 | ||
1195 | return crc; | |
1196 | } | |
1197 | ||
1198 | static inline u32 pblk_calc_smeta_crc(struct pblk *pblk, | |
1199 | struct line_smeta *smeta) | |
1200 | { | |
1201 | struct pblk_line_meta *lm = &pblk->lm; | |
1202 | u32 crc = ~(u32)0; | |
1203 | ||
1204 | crc = crc32_le(crc, (unsigned char *)smeta + | |
1205 | sizeof(struct line_header) + sizeof(crc), | |
1206 | lm->smeta_len - | |
1207 | sizeof(struct line_header) - sizeof(crc)); | |
1208 | ||
1209 | return crc; | |
1210 | } | |
1211 | ||
1212 | static inline u32 pblk_calc_emeta_crc(struct pblk *pblk, | |
1213 | struct line_emeta *emeta) | |
1214 | { | |
1215 | struct pblk_line_meta *lm = &pblk->lm; | |
1216 | u32 crc = ~(u32)0; | |
1217 | ||
1218 | crc = crc32_le(crc, (unsigned char *)emeta + | |
1219 | sizeof(struct line_header) + sizeof(crc), | |
dd2a4343 | 1220 | lm->emeta_len[0] - |
a4bd217b JG |
1221 | sizeof(struct line_header) - sizeof(crc)); |
1222 | ||
1223 | return crc; | |
1224 | } | |
1225 | ||
f9c10152 | 1226 | static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs) |
a4bd217b | 1227 | { |
f9c10152 | 1228 | return !(nr_secs % pblk->min_write_pgs); |
a4bd217b JG |
1229 | } |
1230 | ||
880eda54 | 1231 | #ifdef CONFIG_NVM_PBLK_DEBUG |
4e495a46 | 1232 | static inline void print_ppa(struct pblk *pblk, struct ppa_addr *p, |
3b2a3ad1 | 1233 | char *msg, int error) |
a4bd217b | 1234 | { |
4e495a46 MB |
1235 | struct nvm_geo *geo = &pblk->dev->geo; |
1236 | ||
a4bd217b | 1237 | if (p->c.is_cached) { |
4e495a46 | 1238 | pblk_err(pblk, "ppa: (%s: %x) cache line: %llu\n", |
a4bd217b | 1239 | msg, error, (u64)p->c.line); |
3b2a3ad1 | 1240 | } else if (geo->version == NVM_OCSSD_SPEC_12) { |
4e495a46 | 1241 | pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n", |
a4bd217b JG |
1242 | msg, error, |
1243 | p->g.ch, p->g.lun, p->g.blk, | |
1244 | p->g.pg, p->g.pl, p->g.sec); | |
3b2a3ad1 | 1245 | } else { |
4e495a46 | 1246 | pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,chk:%d,sec:%d\n", |
3b2a3ad1 JG |
1247 | msg, error, |
1248 | p->m.grp, p->m.pu, p->m.chk, p->m.sec); | |
a4bd217b JG |
1249 | } |
1250 | } | |
1251 | ||
1252 | static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd, | |
1253 | int error) | |
1254 | { | |
1255 | int bit = -1; | |
1256 | ||
1257 | if (rqd->nr_ppas == 1) { | |
4e495a46 | 1258 | print_ppa(pblk, &rqd->ppa_addr, "rqd", error); |
a4bd217b JG |
1259 | return; |
1260 | } | |
1261 | ||
1262 | while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas, | |
1263 | bit + 1)) < rqd->nr_ppas) { | |
4e495a46 | 1264 | print_ppa(pblk, &rqd->ppa_list[bit], "rqd", error); |
a4bd217b JG |
1265 | } |
1266 | ||
4e495a46 | 1267 | pblk_err(pblk, "error:%d, ppa_status:%llx\n", error, rqd->ppa_status); |
a4bd217b | 1268 | } |
a4bd217b JG |
1269 | |
1270 | static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev, | |
1271 | struct ppa_addr *ppas, int nr_ppas) | |
1272 | { | |
1273 | struct nvm_geo *geo = &tgt_dev->geo; | |
1274 | struct ppa_addr *ppa; | |
1275 | int i; | |
1276 | ||
1277 | for (i = 0; i < nr_ppas; i++) { | |
1278 | ppa = &ppas[i]; | |
1279 | ||
3b2a3ad1 JG |
1280 | if (geo->version == NVM_OCSSD_SPEC_12) { |
1281 | if (!ppa->c.is_cached && | |
1282 | ppa->g.ch < geo->num_ch && | |
1283 | ppa->g.lun < geo->num_lun && | |
1284 | ppa->g.pl < geo->num_pln && | |
1285 | ppa->g.blk < geo->num_chk && | |
1286 | ppa->g.pg < geo->num_pg && | |
1287 | ppa->g.sec < geo->ws_min) | |
1288 | continue; | |
1289 | } else { | |
1290 | if (!ppa->c.is_cached && | |
1291 | ppa->m.grp < geo->num_ch && | |
1292 | ppa->m.pu < geo->num_lun && | |
1293 | ppa->m.chk < geo->num_chk && | |
1294 | ppa->m.sec < geo->clba) | |
1295 | continue; | |
1296 | } | |
1297 | ||
4e495a46 | 1298 | print_ppa(tgt_dev->q->queuedata, ppa, "boundary", i); |
1a94b2d4 | 1299 | |
a4bd217b JG |
1300 | return 1; |
1301 | } | |
1302 | return 0; | |
1303 | } | |
1304 | ||
1a94b2d4 JG |
1305 | static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd) |
1306 | { | |
1307 | struct nvm_tgt_dev *dev = pblk->dev; | |
d68a9344 | 1308 | struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd); |
1a94b2d4 JG |
1309 | |
1310 | if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) { | |
1311 | WARN_ON(1); | |
1312 | return -EINVAL; | |
1313 | } | |
1314 | ||
1315 | if (rqd->opcode == NVM_OP_PWRITE) { | |
1316 | struct pblk_line *line; | |
1a94b2d4 JG |
1317 | int i; |
1318 | ||
1319 | for (i = 0; i < rqd->nr_ppas; i++) { | |
cb21665c | 1320 | line = pblk_ppa_to_line(pblk, ppa_list[i]); |
1a94b2d4 JG |
1321 | |
1322 | spin_lock(&line->lock); | |
1323 | if (line->state != PBLK_LINESTATE_OPEN) { | |
4e495a46 | 1324 | pblk_err(pblk, "bad ppa: line:%d,state:%d\n", |
1a94b2d4 JG |
1325 | line->id, line->state); |
1326 | WARN_ON(1); | |
1327 | spin_unlock(&line->lock); | |
1328 | return -EINVAL; | |
1329 | } | |
1330 | spin_unlock(&line->lock); | |
1331 | } | |
1332 | } | |
1333 | ||
1334 | return 0; | |
1335 | } | |
1336 | #endif | |
1337 | ||
a4bd217b JG |
1338 | static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr) |
1339 | { | |
1340 | struct pblk_line_meta *lm = &pblk->lm; | |
1341 | ||
1342 | if (paddr > lm->sec_per_line) | |
1343 | return 1; | |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | static inline unsigned int pblk_get_bi_idx(struct bio *bio) | |
1349 | { | |
1350 | return bio->bi_iter.bi_idx; | |
1351 | } | |
1352 | ||
1353 | static inline sector_t pblk_get_lba(struct bio *bio) | |
1354 | { | |
1355 | return bio->bi_iter.bi_sector / NR_PHY_IN_LOG; | |
1356 | } | |
1357 | ||
1358 | static inline unsigned int pblk_get_secs(struct bio *bio) | |
1359 | { | |
1360 | return bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE; | |
1361 | } | |
1362 | ||
a4bd217b JG |
1363 | static inline void pblk_setup_uuid(struct pblk *pblk) |
1364 | { | |
1365 | uuid_le uuid; | |
1366 | ||
1367 | uuid_le_gen(&uuid); | |
1368 | memcpy(pblk->instance_uuid, uuid.b, 16); | |
1369 | } | |
4c44abf4 HH |
1370 | |
1371 | static inline char *pblk_disk_name(struct pblk *pblk) | |
1372 | { | |
1373 | struct gendisk *disk = pblk->disk; | |
1374 | ||
1375 | return disk->disk_name; | |
1376 | } | |
3bcebc5b HH |
1377 | |
1378 | static inline unsigned int pblk_get_min_chks(struct pblk *pblk) | |
1379 | { | |
1380 | struct pblk_line_meta *lm = &pblk->lm; | |
1381 | /* In a worst-case scenario every line will have OP invalid sectors. | |
1382 | * We will then need a minimum of 1/OP lines to free up a single line | |
1383 | */ | |
1384 | ||
1385 | return DIV_ROUND_UP(100, pblk->op) * lm->blk_per_line; | |
faa79f27 | 1386 | } |
3bcebc5b | 1387 | |
faa79f27 IK |
1388 | static inline struct pblk_sec_meta *pblk_get_meta(struct pblk *pblk, |
1389 | void *meta, int index) | |
1390 | { | |
2c4d5356 IK |
1391 | return meta + |
1392 | max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size) | |
1393 | * index; | |
3bcebc5b | 1394 | } |
24828d05 IK |
1395 | |
1396 | static inline int pblk_dma_meta_size(struct pblk *pblk) | |
1397 | { | |
2c4d5356 IK |
1398 | return max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size) |
1399 | * NVM_MAX_VLBA; | |
24828d05 | 1400 | } |
55d8ec35 IK |
1401 | |
1402 | static inline int pblk_is_oob_meta_supported(struct pblk *pblk) | |
1403 | { | |
1404 | return pblk->oob_meta_size >= sizeof(struct pblk_sec_meta); | |
1405 | } | |
a4bd217b | 1406 | #endif /* PBLK_H_ */ |