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