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