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1 | /* | |
2 | * Copyright (C) 2015 IT University of Copenhagen (rrpc.h) | |
3 | * Copyright (C) 2016 CNEX Labs | |
4 | * Initial release: Matias Bjorling <matias@cnexlabs.com> | |
5 | * Write buffering: Javier Gonzalez <javier@cnexlabs.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License version | |
9 | * 2 as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * Implementation of a Physical Block-device target for Open-channel SSDs. | |
17 | * | |
18 | */ | |
19 | ||
20 | #ifndef PBLK_H_ | |
21 | #define PBLK_H_ | |
22 | ||
23 | #include <linux/blkdev.h> | |
24 | #include <linux/blk-mq.h> | |
25 | #include <linux/bio.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/kthread.h> | |
28 | #include <linux/vmalloc.h> | |
29 | #include <linux/crc32.h> | |
30 | #include <linux/uuid.h> | |
31 | ||
32 | #include <linux/lightnvm.h> | |
33 | ||
34 | /* Run only GC if less than 1/X blocks are free */ | |
35 | #define GC_LIMIT_INVERSE 5 | |
36 | #define GC_TIME_MSECS 1000 | |
37 | ||
38 | #define PBLK_SECTOR (512) | |
39 | #define PBLK_EXPOSED_PAGE_SIZE (4096) | |
40 | #define PBLK_MAX_REQ_ADDRS (64) | |
41 | #define PBLK_MAX_REQ_ADDRS_PW (6) | |
42 | ||
43 | #define PBLK_NR_CLOSE_JOBS (4) | |
44 | ||
45 | #define PBLK_CACHE_NAME_LEN (DISK_NAME_LEN + 16) | |
46 | ||
47 | #define PBLK_COMMAND_TIMEOUT_MS 30000 | |
48 | ||
49 | /* Max 512 LUNs per device */ | |
50 | #define PBLK_MAX_LUNS_BITMAP (4) | |
51 | ||
52 | #define NR_PHY_IN_LOG (PBLK_EXPOSED_PAGE_SIZE / PBLK_SECTOR) | |
53 | ||
54 | #define pblk_for_each_lun(pblk, rlun, i) \ | |
55 | for ((i) = 0, rlun = &(pblk)->luns[0]; \ | |
56 | (i) < (pblk)->nr_luns; (i)++, rlun = &(pblk)->luns[(i)]) | |
57 | ||
58 | /* Static pool sizes */ | |
59 | #define PBLK_GEN_WS_POOL_SIZE (2) | |
60 | ||
61 | enum { | |
62 | PBLK_READ = READ, | |
63 | PBLK_WRITE = WRITE,/* Write from write buffer */ | |
64 | PBLK_WRITE_INT, /* Internal write - no write buffer */ | |
65 | PBLK_ERASE, | |
66 | }; | |
67 | ||
68 | enum { | |
69 | /* IO Types */ | |
70 | PBLK_IOTYPE_USER = 1 << 0, | |
71 | PBLK_IOTYPE_GC = 1 << 1, | |
72 | ||
73 | /* Write buffer flags */ | |
74 | PBLK_FLUSH_ENTRY = 1 << 2, | |
75 | PBLK_WRITTEN_DATA = 1 << 3, | |
76 | PBLK_SUBMITTED_ENTRY = 1 << 4, | |
77 | PBLK_WRITABLE_ENTRY = 1 << 5, | |
78 | }; | |
79 | ||
80 | enum { | |
81 | PBLK_BLK_ST_OPEN = 0x1, | |
82 | PBLK_BLK_ST_CLOSED = 0x2, | |
83 | }; | |
84 | ||
85 | struct pblk_sec_meta { | |
86 | u64 reserved; | |
87 | __le64 lba; | |
88 | }; | |
89 | ||
90 | /* The number of GC lists and the rate-limiter states go together. This way the | |
91 | * rate-limiter can dictate how much GC is needed based on resource utilization. | |
92 | */ | |
93 | #define PBLK_GC_NR_LISTS 3 | |
94 | ||
95 | enum { | |
96 | PBLK_RL_HIGH = 1, | |
97 | PBLK_RL_MID = 2, | |
98 | PBLK_RL_LOW = 3, | |
99 | }; | |
100 | ||
101 | #define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS) | |
102 | #define pblk_dma_ppa_size (sizeof(u64) * PBLK_MAX_REQ_ADDRS) | |
103 | ||
104 | /* write buffer completion context */ | |
105 | struct pblk_c_ctx { | |
106 | struct list_head list; /* Head for out-of-order completion */ | |
107 | ||
108 | unsigned long *lun_bitmap; /* Luns used on current request */ | |
109 | unsigned int sentry; | |
110 | unsigned int nr_valid; | |
111 | unsigned int nr_padded; | |
112 | }; | |
113 | ||
114 | /* read context */ | |
115 | struct pblk_g_ctx { | |
116 | void *private; | |
117 | u64 lba; | |
118 | }; | |
119 | ||
120 | /* Pad context */ | |
121 | struct pblk_pad_rq { | |
122 | struct pblk *pblk; | |
123 | struct completion wait; | |
124 | struct kref ref; | |
125 | }; | |
126 | ||
127 | /* Recovery context */ | |
128 | struct pblk_rec_ctx { | |
129 | struct pblk *pblk; | |
130 | struct nvm_rq *rqd; | |
131 | struct list_head failed; | |
132 | struct work_struct ws_rec; | |
133 | }; | |
134 | ||
135 | /* Write context */ | |
136 | struct pblk_w_ctx { | |
137 | struct bio_list bios; /* Original bios - used for completion | |
138 | * in REQ_FUA, REQ_FLUSH case | |
139 | */ | |
140 | u64 lba; /* Logic addr. associated with entry */ | |
141 | struct ppa_addr ppa; /* Physic addr. associated with entry */ | |
142 | int flags; /* Write context flags */ | |
143 | }; | |
144 | ||
145 | struct pblk_rb_entry { | |
146 | struct ppa_addr cacheline; /* Cacheline for this entry */ | |
147 | void *data; /* Pointer to data on this entry */ | |
148 | struct pblk_w_ctx w_ctx; /* Context for this entry */ | |
149 | struct list_head index; /* List head to enable indexes */ | |
150 | }; | |
151 | ||
152 | #define EMPTY_ENTRY (~0U) | |
153 | ||
154 | struct pblk_rb_pages { | |
155 | struct page *pages; | |
156 | int order; | |
157 | struct list_head list; | |
158 | }; | |
159 | ||
160 | struct pblk_rb { | |
161 | struct pblk_rb_entry *entries; /* Ring buffer entries */ | |
162 | unsigned int mem; /* Write offset - points to next | |
163 | * writable entry in memory | |
164 | */ | |
165 | unsigned int subm; /* Read offset - points to last entry | |
166 | * that has been submitted to the media | |
167 | * to be persisted | |
168 | */ | |
169 | unsigned int sync; /* Synced - backpointer that signals | |
170 | * the last submitted entry that has | |
171 | * been successfully persisted to media | |
172 | */ | |
173 | unsigned int sync_point; /* Sync point - last entry that must be | |
174 | * flushed to the media. Used with | |
175 | * REQ_FLUSH and REQ_FUA | |
176 | */ | |
177 | unsigned int l2p_update; /* l2p update point - next entry for | |
178 | * which l2p mapping will be updated to | |
179 | * contain a device ppa address (instead | |
180 | * of a cacheline | |
181 | */ | |
182 | unsigned int nr_entries; /* Number of entries in write buffer - | |
183 | * must be a power of two | |
184 | */ | |
185 | unsigned int seg_size; /* Size of the data segments being | |
186 | * stored on each entry. Typically this | |
187 | * will be 4KB | |
188 | */ | |
189 | ||
190 | struct list_head pages; /* List of data pages */ | |
191 | ||
192 | spinlock_t w_lock; /* Write lock */ | |
193 | spinlock_t s_lock; /* Sync lock */ | |
194 | ||
195 | #ifdef CONFIG_NVM_DEBUG | |
196 | atomic_t inflight_sync_point; /* Not served REQ_FLUSH | REQ_FUA */ | |
197 | #endif | |
198 | }; | |
199 | ||
200 | #define PBLK_RECOVERY_SECTORS 16 | |
201 | ||
202 | struct pblk_lun { | |
203 | struct ppa_addr bppa; | |
204 | ||
205 | u8 *bb_list; /* Bad block list for LUN. Only used on | |
206 | * bring up. Bad blocks are managed | |
207 | * within lines on run-time. | |
208 | */ | |
209 | ||
210 | struct semaphore wr_sem; | |
211 | }; | |
212 | ||
213 | struct pblk_gc_rq { | |
214 | struct pblk_line *line; | |
215 | void *data; | |
216 | u64 paddr_list[PBLK_MAX_REQ_ADDRS]; | |
217 | u64 lba_list[PBLK_MAX_REQ_ADDRS]; | |
218 | int nr_secs; | |
219 | int secs_to_gc; | |
220 | struct list_head list; | |
221 | }; | |
222 | ||
223 | struct pblk_gc { | |
224 | /* These states are not protected by a lock since (i) they are in the | |
225 | * fast path, and (ii) they are not critical. | |
226 | */ | |
227 | int gc_active; | |
228 | int gc_enabled; | |
229 | int gc_forced; | |
230 | ||
231 | struct task_struct *gc_ts; | |
232 | struct task_struct *gc_writer_ts; | |
233 | struct task_struct *gc_reader_ts; | |
234 | ||
235 | struct workqueue_struct *gc_line_reader_wq; | |
236 | struct workqueue_struct *gc_reader_wq; | |
237 | ||
238 | struct timer_list gc_timer; | |
239 | ||
240 | struct semaphore gc_sem; | |
241 | atomic_t read_inflight_gc; /* Number of lines with inflight GC reads */ | |
242 | atomic_t pipeline_gc; /* Number of lines in the GC pipeline - | |
243 | * started reads to finished writes | |
244 | */ | |
245 | int w_entries; | |
246 | ||
247 | struct list_head w_list; | |
248 | struct list_head r_list; | |
249 | ||
250 | spinlock_t lock; | |
251 | spinlock_t w_lock; | |
252 | spinlock_t r_lock; | |
253 | }; | |
254 | ||
255 | struct pblk_rl { | |
256 | unsigned int high; /* Upper threshold for rate limiter (free run - | |
257 | * user I/O rate limiter | |
258 | */ | |
259 | unsigned int low; /* Lower threshold for rate limiter (user I/O | |
260 | * rate limiter - stall) | |
261 | */ | |
262 | unsigned int high_pw; /* High rounded up as a power of 2 */ | |
263 | ||
264 | #define PBLK_USER_HIGH_THRS 8 /* Begin write limit at 12% available blks */ | |
265 | #define PBLK_USER_LOW_THRS 10 /* Aggressive GC at 10% available blocks */ | |
266 | ||
267 | int rb_windows_pw; /* Number of rate windows in the write buffer | |
268 | * given as a power-of-2. This guarantees that | |
269 | * when user I/O is being rate limited, there | |
270 | * will be reserved enough space for the GC to | |
271 | * place its payload. A window is of | |
272 | * pblk->max_write_pgs size, which in NVMe is | |
273 | * 64, i.e., 256kb. | |
274 | */ | |
275 | int rb_budget; /* Total number of entries available for I/O */ | |
276 | int rb_user_max; /* Max buffer entries available for user I/O */ | |
277 | int rb_gc_max; /* Max buffer entries available for GC I/O */ | |
278 | int rb_gc_rsv; /* Reserved buffer entries for GC I/O */ | |
279 | int rb_state; /* Rate-limiter current state */ | |
280 | int rb_max_io; /* Maximum size for an I/O giving the config */ | |
281 | ||
282 | atomic_t rb_user_cnt; /* User I/O buffer counter */ | |
283 | atomic_t rb_gc_cnt; /* GC I/O buffer counter */ | |
284 | atomic_t rb_space; /* Space limit in case of reaching capacity */ | |
285 | ||
286 | int rsv_blocks; /* Reserved blocks for GC */ | |
287 | ||
288 | int rb_user_active; | |
289 | int rb_gc_active; | |
290 | ||
291 | struct timer_list u_timer; | |
292 | ||
293 | unsigned long long nr_secs; | |
294 | unsigned long total_blocks; | |
295 | atomic_t free_blocks; | |
296 | }; | |
297 | ||
298 | #define PBLK_LINE_EMPTY (~0U) | |
299 | ||
300 | enum { | |
301 | /* Line Types */ | |
302 | PBLK_LINETYPE_FREE = 0, | |
303 | PBLK_LINETYPE_LOG = 1, | |
304 | PBLK_LINETYPE_DATA = 2, | |
305 | ||
306 | /* Line state */ | |
307 | PBLK_LINESTATE_FREE = 10, | |
308 | PBLK_LINESTATE_OPEN = 11, | |
309 | PBLK_LINESTATE_CLOSED = 12, | |
310 | PBLK_LINESTATE_GC = 13, | |
311 | PBLK_LINESTATE_BAD = 14, | |
312 | PBLK_LINESTATE_CORRUPT = 15, | |
313 | ||
314 | /* GC group */ | |
315 | PBLK_LINEGC_NONE = 20, | |
316 | PBLK_LINEGC_EMPTY = 21, | |
317 | PBLK_LINEGC_LOW = 22, | |
318 | PBLK_LINEGC_MID = 23, | |
319 | PBLK_LINEGC_HIGH = 24, | |
320 | PBLK_LINEGC_FULL = 25, | |
321 | }; | |
322 | ||
323 | #define PBLK_MAGIC 0x70626c6b /*pblk*/ | |
324 | #define SMETA_VERSION cpu_to_le16(1) | |
325 | ||
326 | struct line_header { | |
327 | __le32 crc; | |
328 | __le32 identifier; /* pblk identifier */ | |
329 | __u8 uuid[16]; /* instance uuid */ | |
330 | __le16 type; /* line type */ | |
331 | __le16 version; /* type version */ | |
332 | __le32 id; /* line id for current line */ | |
333 | }; | |
334 | ||
335 | struct line_smeta { | |
336 | struct line_header header; | |
337 | ||
338 | __le32 crc; /* Full structure including struct crc */ | |
339 | /* Previous line metadata */ | |
340 | __le32 prev_id; /* Line id for previous line */ | |
341 | ||
342 | /* Current line metadata */ | |
343 | __le64 seq_nr; /* Sequence number for current line */ | |
344 | ||
345 | /* Active writers */ | |
346 | __le32 window_wr_lun; /* Number of parallel LUNs to write */ | |
347 | ||
348 | __le32 rsvd[2]; | |
349 | ||
350 | __le64 lun_bitmap[]; | |
351 | }; | |
352 | ||
353 | /* | |
354 | * Metadata layout in media: | |
355 | * First sector: | |
356 | * 1. struct line_emeta | |
357 | * 2. bad block bitmap (u64 * window_wr_lun) | |
358 | * Mid sectors (start at lbas_sector): | |
359 | * 3. nr_lbas (u64) forming lba list | |
360 | * Last sectors (start at vsc_sector): | |
361 | * 4. u32 valid sector count (vsc) for all lines (~0U: free line) | |
362 | */ | |
363 | struct line_emeta { | |
364 | struct line_header header; | |
365 | ||
366 | __le32 crc; /* Full structure including struct crc */ | |
367 | ||
368 | /* Previous line metadata */ | |
369 | __le32 prev_id; /* Line id for prev line */ | |
370 | ||
371 | /* Current line metadata */ | |
372 | __le64 seq_nr; /* Sequence number for current line */ | |
373 | ||
374 | /* Active writers */ | |
375 | __le32 window_wr_lun; /* Number of parallel LUNs to write */ | |
376 | ||
377 | /* Bookkeeping for recovery */ | |
378 | __le32 next_id; /* Line id for next line */ | |
379 | __le64 nr_lbas; /* Number of lbas mapped in line */ | |
380 | __le64 nr_valid_lbas; /* Number of valid lbas mapped in line */ | |
381 | __le64 bb_bitmap[]; /* Updated bad block bitmap for line */ | |
382 | }; | |
383 | ||
384 | struct pblk_emeta { | |
385 | struct line_emeta *buf; /* emeta buffer in media format */ | |
386 | int mem; /* Write offset - points to next | |
387 | * writable entry in memory | |
388 | */ | |
389 | atomic_t sync; /* Synced - backpointer that signals the | |
390 | * last entry that has been successfully | |
391 | * persisted to media | |
392 | */ | |
393 | unsigned int nr_entries; /* Number of emeta entries */ | |
394 | }; | |
395 | ||
396 | struct pblk_smeta { | |
397 | struct line_smeta *buf; /* smeta buffer in persistent format */ | |
398 | }; | |
399 | ||
400 | struct pblk_line { | |
401 | struct pblk *pblk; | |
402 | unsigned int id; /* Line number corresponds to the | |
403 | * block line | |
404 | */ | |
405 | unsigned int seq_nr; /* Unique line sequence number */ | |
406 | ||
407 | int state; /* PBLK_LINESTATE_X */ | |
408 | int type; /* PBLK_LINETYPE_X */ | |
409 | int gc_group; /* PBLK_LINEGC_X */ | |
410 | struct list_head list; /* Free, GC lists */ | |
411 | ||
412 | unsigned long *lun_bitmap; /* Bitmap for LUNs mapped in line */ | |
413 | ||
414 | struct pblk_smeta *smeta; /* Start metadata */ | |
415 | struct pblk_emeta *emeta; /* End medatada */ | |
416 | ||
417 | int meta_line; /* Metadata line id */ | |
418 | int meta_distance; /* Distance between data and metadata */ | |
419 | ||
420 | u64 smeta_ssec; /* Sector where smeta starts */ | |
421 | u64 emeta_ssec; /* Sector where emeta starts */ | |
422 | ||
423 | unsigned int sec_in_line; /* Number of usable secs in line */ | |
424 | ||
425 | atomic_t blk_in_line; /* Number of good blocks in line */ | |
426 | unsigned long *blk_bitmap; /* Bitmap for valid/invalid blocks */ | |
427 | unsigned long *erase_bitmap; /* Bitmap for erased blocks */ | |
428 | ||
429 | unsigned long *map_bitmap; /* Bitmap for mapped sectors in line */ | |
430 | unsigned long *invalid_bitmap; /* Bitmap for invalid sectors in line */ | |
431 | ||
432 | atomic_t left_eblks; /* Blocks left for erasing */ | |
433 | atomic_t left_seblks; /* Blocks left for sync erasing */ | |
434 | ||
435 | int left_msecs; /* Sectors left for mapping */ | |
436 | unsigned int cur_sec; /* Sector map pointer */ | |
437 | unsigned int nr_valid_lbas; /* Number of valid lbas in line */ | |
438 | ||
439 | __le32 *vsc; /* Valid sector count in line */ | |
440 | ||
441 | struct kref ref; /* Write buffer L2P references */ | |
442 | ||
443 | spinlock_t lock; /* Necessary for invalid_bitmap only */ | |
444 | }; | |
445 | ||
446 | #define PBLK_DATA_LINES 4 | |
447 | ||
448 | enum { | |
449 | PBLK_KMALLOC_META = 1, | |
450 | PBLK_VMALLOC_META = 2, | |
451 | }; | |
452 | ||
453 | enum { | |
454 | PBLK_EMETA_TYPE_HEADER = 1, /* struct line_emeta first sector */ | |
455 | PBLK_EMETA_TYPE_LLBA = 2, /* lba list - type: __le64 */ | |
456 | PBLK_EMETA_TYPE_VSC = 3, /* vsc list - type: __le32 */ | |
457 | }; | |
458 | ||
459 | struct pblk_line_mgmt { | |
460 | int nr_lines; /* Total number of full lines */ | |
461 | int nr_free_lines; /* Number of full lines in free list */ | |
462 | ||
463 | /* Free lists - use free_lock */ | |
464 | struct list_head free_list; /* Full lines ready to use */ | |
465 | struct list_head corrupt_list; /* Full lines corrupted */ | |
466 | struct list_head bad_list; /* Full lines bad */ | |
467 | ||
468 | /* GC lists - use gc_lock */ | |
469 | struct list_head *gc_lists[PBLK_GC_NR_LISTS]; | |
470 | struct list_head gc_high_list; /* Full lines ready to GC, high isc */ | |
471 | struct list_head gc_mid_list; /* Full lines ready to GC, mid isc */ | |
472 | struct list_head gc_low_list; /* Full lines ready to GC, low isc */ | |
473 | ||
474 | struct list_head gc_full_list; /* Full lines ready to GC, no valid */ | |
475 | struct list_head gc_empty_list; /* Full lines close, all valid */ | |
476 | ||
477 | struct pblk_line *log_line; /* Current FTL log line */ | |
478 | struct pblk_line *data_line; /* Current data line */ | |
479 | struct pblk_line *log_next; /* Next FTL log line */ | |
480 | struct pblk_line *data_next; /* Next data line */ | |
481 | ||
482 | struct list_head emeta_list; /* Lines queued to schedule emeta */ | |
483 | ||
484 | __le32 *vsc_list; /* Valid sector counts for all lines */ | |
485 | ||
486 | /* Metadata allocation type: VMALLOC | KMALLOC */ | |
487 | int emeta_alloc_type; | |
488 | ||
489 | /* Pre-allocated metadata for data lines */ | |
490 | struct pblk_smeta *sline_meta[PBLK_DATA_LINES]; | |
491 | struct pblk_emeta *eline_meta[PBLK_DATA_LINES]; | |
492 | unsigned long meta_bitmap; | |
493 | ||
494 | /* Helpers for fast bitmap calculations */ | |
495 | unsigned long *bb_template; | |
496 | unsigned long *bb_aux; | |
497 | ||
498 | unsigned long d_seq_nr; /* Data line unique sequence number */ | |
499 | unsigned long l_seq_nr; /* Log line unique sequence number */ | |
500 | ||
501 | spinlock_t free_lock; | |
502 | spinlock_t close_lock; | |
503 | spinlock_t gc_lock; | |
504 | }; | |
505 | ||
506 | struct pblk_line_meta { | |
507 | unsigned int smeta_len; /* Total length for smeta */ | |
508 | unsigned int smeta_sec; /* Sectors needed for smeta */ | |
509 | ||
510 | unsigned int emeta_len[4]; /* Lengths for emeta: | |
511 | * [0]: Total length | |
512 | * [1]: struct line_emeta length | |
513 | * [2]: L2P portion length | |
514 | * [3]: vsc list length | |
515 | */ | |
516 | unsigned int emeta_sec[4]; /* Sectors needed for emeta. Same layout | |
517 | * as emeta_len | |
518 | */ | |
519 | ||
520 | unsigned int emeta_bb; /* Boundary for bb that affects emeta */ | |
521 | ||
522 | unsigned int vsc_list_len; /* Length for vsc list */ | |
523 | unsigned int sec_bitmap_len; /* Length for sector bitmap in line */ | |
524 | unsigned int blk_bitmap_len; /* Length for block bitmap in line */ | |
525 | unsigned int lun_bitmap_len; /* Length for lun bitmap in line */ | |
526 | ||
527 | unsigned int blk_per_line; /* Number of blocks in a full line */ | |
528 | unsigned int sec_per_line; /* Number of sectors in a line */ | |
529 | unsigned int dsec_per_line; /* Number of data sectors in a line */ | |
530 | unsigned int min_blk_line; /* Min. number of good blocks in line */ | |
531 | ||
532 | unsigned int mid_thrs; /* Threshold for GC mid list */ | |
533 | unsigned int high_thrs; /* Threshold for GC high list */ | |
534 | ||
535 | unsigned int meta_distance; /* Distance between data and metadata */ | |
536 | }; | |
537 | ||
538 | struct pblk_addr_format { | |
539 | u64 ch_mask; | |
540 | u64 lun_mask; | |
541 | u64 pln_mask; | |
542 | u64 blk_mask; | |
543 | u64 pg_mask; | |
544 | u64 sec_mask; | |
545 | u8 ch_offset; | |
546 | u8 lun_offset; | |
547 | u8 pln_offset; | |
548 | u8 blk_offset; | |
549 | u8 pg_offset; | |
550 | u8 sec_offset; | |
551 | }; | |
552 | ||
553 | enum { | |
554 | PBLK_STATE_RUNNING = 0, | |
555 | PBLK_STATE_STOPPING = 1, | |
556 | PBLK_STATE_RECOVERING = 2, | |
557 | PBLK_STATE_STOPPED = 3, | |
558 | }; | |
559 | ||
560 | struct pblk { | |
561 | struct nvm_tgt_dev *dev; | |
562 | struct gendisk *disk; | |
563 | ||
564 | struct kobject kobj; | |
565 | ||
566 | struct pblk_lun *luns; | |
567 | ||
568 | struct pblk_line *lines; /* Line array */ | |
569 | struct pblk_line_mgmt l_mg; /* Line management */ | |
570 | struct pblk_line_meta lm; /* Line metadata */ | |
571 | ||
572 | int ppaf_bitsize; | |
573 | struct pblk_addr_format ppaf; | |
574 | ||
575 | struct pblk_rb rwb; | |
576 | ||
577 | int state; /* pblk line state */ | |
578 | ||
579 | int min_write_pgs; /* Minimum amount of pages required by controller */ | |
580 | int max_write_pgs; /* Maximum amount of pages supported by controller */ | |
581 | int pgs_in_buffer; /* Number of pages that need to be held in buffer to | |
582 | * guarantee successful reads. | |
583 | */ | |
584 | ||
585 | sector_t capacity; /* Device capacity when bad blocks are subtracted */ | |
586 | int over_pct; /* Percentage of device used for over-provisioning */ | |
587 | ||
588 | /* pblk provisioning values. Used by rate limiter */ | |
589 | struct pblk_rl rl; | |
590 | ||
591 | int sec_per_write; | |
592 | ||
593 | unsigned char instance_uuid[16]; | |
594 | #ifdef CONFIG_NVM_DEBUG | |
595 | /* All debug counters apply to 4kb sector I/Os */ | |
596 | atomic_long_t inflight_writes; /* Inflight writes (user and gc) */ | |
597 | atomic_long_t padded_writes; /* Sectors padded due to flush/fua */ | |
598 | atomic_long_t padded_wb; /* Sectors padded in write buffer */ | |
599 | atomic_long_t nr_flush; /* Number of flush/fua I/O */ | |
600 | atomic_long_t req_writes; /* Sectors stored on write buffer */ | |
601 | atomic_long_t sub_writes; /* Sectors submitted from buffer */ | |
602 | atomic_long_t sync_writes; /* Sectors synced to media */ | |
603 | atomic_long_t inflight_reads; /* Inflight sector read requests */ | |
604 | atomic_long_t cache_reads; /* Read requests that hit the cache */ | |
605 | atomic_long_t sync_reads; /* Completed sector read requests */ | |
606 | atomic_long_t recov_writes; /* Sectors submitted from recovery */ | |
607 | atomic_long_t recov_gc_writes; /* Sectors submitted from write GC */ | |
608 | atomic_long_t recov_gc_reads; /* Sectors submitted from read GC */ | |
609 | #endif | |
610 | ||
611 | spinlock_t lock; | |
612 | ||
613 | atomic_long_t read_failed; | |
614 | atomic_long_t read_empty; | |
615 | atomic_long_t read_high_ecc; | |
616 | atomic_long_t read_failed_gc; | |
617 | atomic_long_t write_failed; | |
618 | atomic_long_t erase_failed; | |
619 | ||
620 | atomic_t inflight_io; /* General inflight I/O counter */ | |
621 | ||
622 | struct task_struct *writer_ts; | |
623 | ||
624 | /* Simple translation map of logical addresses to physical addresses. | |
625 | * The logical addresses is known by the host system, while the physical | |
626 | * addresses are used when writing to the disk block device. | |
627 | */ | |
628 | unsigned char *trans_map; | |
629 | spinlock_t trans_lock; | |
630 | ||
631 | struct list_head compl_list; | |
632 | ||
633 | mempool_t *page_bio_pool; | |
634 | mempool_t *gen_ws_pool; | |
635 | mempool_t *rec_pool; | |
636 | mempool_t *r_rq_pool; | |
637 | mempool_t *w_rq_pool; | |
638 | mempool_t *e_rq_pool; | |
639 | ||
640 | struct workqueue_struct *close_wq; | |
641 | struct workqueue_struct *bb_wq; | |
642 | struct workqueue_struct *r_end_wq; | |
643 | ||
644 | struct timer_list wtimer; | |
645 | ||
646 | struct pblk_gc gc; | |
647 | }; | |
648 | ||
649 | struct pblk_line_ws { | |
650 | struct pblk *pblk; | |
651 | struct pblk_line *line; | |
652 | void *priv; | |
653 | struct work_struct ws; | |
654 | }; | |
655 | ||
656 | #define pblk_g_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_g_ctx)) | |
657 | #define pblk_w_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_c_ctx)) | |
658 | ||
659 | /* | |
660 | * pblk ring buffer operations | |
661 | */ | |
662 | int pblk_rb_init(struct pblk_rb *rb, struct pblk_rb_entry *rb_entry_base, | |
663 | unsigned int power_size, unsigned int power_seg_sz); | |
664 | unsigned int pblk_rb_calculate_size(unsigned int nr_entries); | |
665 | void *pblk_rb_entries_ref(struct pblk_rb *rb); | |
666 | int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio, | |
667 | unsigned int nr_entries, unsigned int *pos); | |
668 | int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries, | |
669 | unsigned int *pos); | |
670 | void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data, | |
671 | struct pblk_w_ctx w_ctx, unsigned int pos); | |
672 | void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data, | |
673 | struct pblk_w_ctx w_ctx, struct pblk_line *line, | |
674 | u64 paddr, unsigned int pos); | |
675 | struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos); | |
676 | void pblk_rb_flush(struct pblk_rb *rb); | |
677 | ||
678 | void pblk_rb_sync_l2p(struct pblk_rb *rb); | |
679 | unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd, | |
680 | unsigned int pos, unsigned int nr_entries, | |
681 | unsigned int count); | |
682 | unsigned int pblk_rb_read_to_bio_list(struct pblk_rb *rb, struct bio *bio, | |
683 | struct list_head *list, | |
684 | unsigned int max); | |
685 | int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba, | |
686 | struct ppa_addr ppa, int bio_iter, bool advanced_bio); | |
687 | unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries); | |
688 | ||
689 | unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags); | |
690 | unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries); | |
691 | struct pblk_rb_entry *pblk_rb_sync_scan_entry(struct pblk_rb *rb, | |
692 | struct ppa_addr *ppa); | |
693 | void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags); | |
694 | unsigned int pblk_rb_sync_point_count(struct pblk_rb *rb); | |
695 | ||
696 | unsigned int pblk_rb_read_count(struct pblk_rb *rb); | |
697 | unsigned int pblk_rb_sync_count(struct pblk_rb *rb); | |
698 | unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos); | |
699 | ||
700 | int pblk_rb_tear_down_check(struct pblk_rb *rb); | |
701 | int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos); | |
702 | void pblk_rb_data_free(struct pblk_rb *rb); | |
703 | ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf); | |
704 | ||
705 | /* | |
706 | * pblk core | |
707 | */ | |
708 | struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type); | |
709 | void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type); | |
710 | void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write); | |
711 | int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
712 | struct pblk_c_ctx *c_ctx); | |
713 | void pblk_discard(struct pblk *pblk, struct bio *bio); | |
714 | void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd); | |
715 | void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd); | |
716 | int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd); | |
717 | int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd); | |
718 | int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line); | |
719 | struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data, | |
720 | unsigned int nr_secs, unsigned int len, | |
721 | int alloc_type, gfp_t gfp_mask); | |
722 | struct pblk_line *pblk_line_get(struct pblk *pblk); | |
723 | struct pblk_line *pblk_line_get_first_data(struct pblk *pblk); | |
724 | struct pblk_line *pblk_line_replace_data(struct pblk *pblk); | |
725 | int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line); | |
726 | void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line); | |
727 | struct pblk_line *pblk_line_get_data(struct pblk *pblk); | |
728 | struct pblk_line *pblk_line_get_erase(struct pblk *pblk); | |
729 | int pblk_line_erase(struct pblk *pblk, struct pblk_line *line); | |
730 | int pblk_line_is_full(struct pblk_line *line); | |
731 | void pblk_line_free(struct pblk *pblk, struct pblk_line *line); | |
732 | void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line); | |
733 | void pblk_line_close(struct pblk *pblk, struct pblk_line *line); | |
734 | void pblk_line_close_ws(struct work_struct *work); | |
735 | void pblk_pipeline_stop(struct pblk *pblk); | |
736 | void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv, | |
737 | void (*work)(struct work_struct *), gfp_t gfp_mask, | |
738 | struct workqueue_struct *wq); | |
739 | u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line); | |
740 | int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line); | |
741 | int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line, | |
742 | void *emeta_buf); | |
743 | int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa); | |
744 | void pblk_line_put(struct kref *ref); | |
745 | void pblk_line_put_wq(struct kref *ref); | |
746 | struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line); | |
747 | u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line); | |
748 | void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); | |
749 | u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); | |
750 | u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); | |
751 | int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail, | |
752 | unsigned long secs_to_flush); | |
753 | void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas); | |
754 | void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, | |
755 | unsigned long *lun_bitmap); | |
756 | void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas); | |
757 | void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, | |
758 | unsigned long *lun_bitmap); | |
759 | void pblk_end_io_sync(struct nvm_rq *rqd); | |
760 | int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, | |
761 | int nr_pages); | |
762 | void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, | |
763 | int nr_pages); | |
764 | void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa); | |
765 | void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, | |
766 | u64 paddr); | |
767 | void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa); | |
768 | void pblk_update_map_cache(struct pblk *pblk, sector_t lba, | |
769 | struct ppa_addr ppa); | |
770 | void pblk_update_map_dev(struct pblk *pblk, sector_t lba, | |
771 | struct ppa_addr ppa, struct ppa_addr entry_line); | |
772 | int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa, | |
773 | struct pblk_line *gc_line, u64 paddr); | |
774 | void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas, | |
775 | u64 *lba_list, int nr_secs); | |
776 | void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas, | |
777 | sector_t blba, int nr_secs); | |
778 | ||
779 | /* | |
780 | * pblk user I/O write path | |
781 | */ | |
782 | int pblk_write_to_cache(struct pblk *pblk, struct bio *bio, | |
783 | unsigned long flags); | |
784 | int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq); | |
785 | ||
786 | /* | |
787 | * pblk map | |
788 | */ | |
789 | void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
790 | unsigned int sentry, unsigned long *lun_bitmap, | |
791 | unsigned int valid_secs, struct ppa_addr *erase_ppa); | |
792 | void pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry, | |
793 | unsigned long *lun_bitmap, unsigned int valid_secs, | |
794 | unsigned int off); | |
795 | ||
796 | /* | |
797 | * pblk write thread | |
798 | */ | |
799 | int pblk_write_ts(void *data); | |
800 | void pblk_write_timer_fn(struct timer_list *t); | |
801 | void pblk_write_should_kick(struct pblk *pblk); | |
802 | ||
803 | /* | |
804 | * pblk read path | |
805 | */ | |
806 | extern struct bio_set *pblk_bio_set; | |
807 | int pblk_submit_read(struct pblk *pblk, struct bio *bio); | |
808 | int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq); | |
809 | /* | |
810 | * pblk recovery | |
811 | */ | |
812 | void pblk_submit_rec(struct work_struct *work); | |
813 | struct pblk_line *pblk_recov_l2p(struct pblk *pblk); | |
814 | int pblk_recov_pad(struct pblk *pblk); | |
815 | __le64 *pblk_recov_get_lba_list(struct pblk *pblk, struct line_emeta *emeta); | |
816 | int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx, | |
817 | struct pblk_rec_ctx *recovery, u64 *comp_bits, | |
818 | unsigned int comp); | |
819 | ||
820 | /* | |
821 | * pblk gc | |
822 | */ | |
823 | #define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */ | |
824 | #define PBLK_GC_RQ_QD 128 /* Queue depth for inflight GC requests */ | |
825 | #define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */ | |
826 | #define PBLK_GC_RSV_LINE 1 /* Reserved lines for GC */ | |
827 | ||
828 | int pblk_gc_init(struct pblk *pblk); | |
829 | void pblk_gc_exit(struct pblk *pblk); | |
830 | void pblk_gc_should_start(struct pblk *pblk); | |
831 | void pblk_gc_should_stop(struct pblk *pblk); | |
832 | void pblk_gc_should_kick(struct pblk *pblk); | |
833 | void pblk_gc_free_full_lines(struct pblk *pblk); | |
834 | void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled, | |
835 | int *gc_active); | |
836 | int pblk_gc_sysfs_force(struct pblk *pblk, int force); | |
837 | ||
838 | /* | |
839 | * pblk rate limiter | |
840 | */ | |
841 | void pblk_rl_init(struct pblk_rl *rl, int budget); | |
842 | void pblk_rl_free(struct pblk_rl *rl); | |
843 | void pblk_rl_update_rates(struct pblk_rl *rl); | |
844 | int pblk_rl_high_thrs(struct pblk_rl *rl); | |
845 | unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl); | |
846 | int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries); | |
847 | void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries); | |
848 | void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries); | |
849 | int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries); | |
850 | void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries); | |
851 | void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc); | |
852 | int pblk_rl_max_io(struct pblk_rl *rl); | |
853 | void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line); | |
854 | void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line); | |
855 | int pblk_rl_is_limit(struct pblk_rl *rl); | |
856 | ||
857 | /* | |
858 | * pblk sysfs | |
859 | */ | |
860 | int pblk_sysfs_init(struct gendisk *tdisk); | |
861 | void pblk_sysfs_exit(struct gendisk *tdisk); | |
862 | ||
863 | static inline void *pblk_malloc(size_t size, int type, gfp_t flags) | |
864 | { | |
865 | if (type == PBLK_KMALLOC_META) | |
866 | return kmalloc(size, flags); | |
867 | return vmalloc(size); | |
868 | } | |
869 | ||
870 | static inline void pblk_mfree(void *ptr, int type) | |
871 | { | |
872 | if (type == PBLK_KMALLOC_META) | |
873 | kfree(ptr); | |
874 | else | |
875 | vfree(ptr); | |
876 | } | |
877 | ||
878 | static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx) | |
879 | { | |
880 | return c_ctx - sizeof(struct nvm_rq); | |
881 | } | |
882 | ||
883 | static inline void *emeta_to_bb(struct line_emeta *emeta) | |
884 | { | |
885 | return emeta->bb_bitmap; | |
886 | } | |
887 | ||
888 | static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta) | |
889 | { | |
890 | return ((void *)emeta + pblk->lm.emeta_len[1]); | |
891 | } | |
892 | ||
893 | static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta) | |
894 | { | |
895 | return (emeta_to_lbas(pblk, emeta) + pblk->lm.emeta_len[2]); | |
896 | } | |
897 | ||
898 | static inline int pblk_line_vsc(struct pblk_line *line) | |
899 | { | |
900 | return le32_to_cpu(*line->vsc); | |
901 | } | |
902 | ||
903 | #define NVM_MEM_PAGE_WRITE (8) | |
904 | ||
905 | static inline int pblk_pad_distance(struct pblk *pblk) | |
906 | { | |
907 | struct nvm_tgt_dev *dev = pblk->dev; | |
908 | struct nvm_geo *geo = &dev->geo; | |
909 | ||
910 | return NVM_MEM_PAGE_WRITE * geo->nr_luns * geo->sec_per_pl; | |
911 | } | |
912 | ||
913 | static inline int pblk_dev_ppa_to_line(struct ppa_addr p) | |
914 | { | |
915 | return p.g.blk; | |
916 | } | |
917 | ||
918 | static inline int pblk_tgt_ppa_to_line(struct ppa_addr p) | |
919 | { | |
920 | return p.g.blk; | |
921 | } | |
922 | ||
923 | static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p) | |
924 | { | |
925 | return p.g.lun * geo->nr_chnls + p.g.ch; | |
926 | } | |
927 | ||
928 | /* A block within a line corresponds to the lun */ | |
929 | static inline int pblk_dev_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p) | |
930 | { | |
931 | return p.g.lun * geo->nr_chnls + p.g.ch; | |
932 | } | |
933 | ||
934 | static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32) | |
935 | { | |
936 | struct ppa_addr ppa64; | |
937 | ||
938 | ppa64.ppa = 0; | |
939 | ||
940 | if (ppa32 == -1) { | |
941 | ppa64.ppa = ADDR_EMPTY; | |
942 | } else if (ppa32 & (1U << 31)) { | |
943 | ppa64.c.line = ppa32 & ((~0U) >> 1); | |
944 | ppa64.c.is_cached = 1; | |
945 | } else { | |
946 | ppa64.g.blk = (ppa32 & pblk->ppaf.blk_mask) >> | |
947 | pblk->ppaf.blk_offset; | |
948 | ppa64.g.pg = (ppa32 & pblk->ppaf.pg_mask) >> | |
949 | pblk->ppaf.pg_offset; | |
950 | ppa64.g.lun = (ppa32 & pblk->ppaf.lun_mask) >> | |
951 | pblk->ppaf.lun_offset; | |
952 | ppa64.g.ch = (ppa32 & pblk->ppaf.ch_mask) >> | |
953 | pblk->ppaf.ch_offset; | |
954 | ppa64.g.pl = (ppa32 & pblk->ppaf.pln_mask) >> | |
955 | pblk->ppaf.pln_offset; | |
956 | ppa64.g.sec = (ppa32 & pblk->ppaf.sec_mask) >> | |
957 | pblk->ppaf.sec_offset; | |
958 | } | |
959 | ||
960 | return ppa64; | |
961 | } | |
962 | ||
963 | static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk, | |
964 | sector_t lba) | |
965 | { | |
966 | struct ppa_addr ppa; | |
967 | ||
968 | if (pblk->ppaf_bitsize < 32) { | |
969 | u32 *map = (u32 *)pblk->trans_map; | |
970 | ||
971 | ppa = pblk_ppa32_to_ppa64(pblk, map[lba]); | |
972 | } else { | |
973 | struct ppa_addr *map = (struct ppa_addr *)pblk->trans_map; | |
974 | ||
975 | ppa = map[lba]; | |
976 | } | |
977 | ||
978 | return ppa; | |
979 | } | |
980 | ||
981 | static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64) | |
982 | { | |
983 | u32 ppa32 = 0; | |
984 | ||
985 | if (ppa64.ppa == ADDR_EMPTY) { | |
986 | ppa32 = ~0U; | |
987 | } else if (ppa64.c.is_cached) { | |
988 | ppa32 |= ppa64.c.line; | |
989 | ppa32 |= 1U << 31; | |
990 | } else { | |
991 | ppa32 |= ppa64.g.blk << pblk->ppaf.blk_offset; | |
992 | ppa32 |= ppa64.g.pg << pblk->ppaf.pg_offset; | |
993 | ppa32 |= ppa64.g.lun << pblk->ppaf.lun_offset; | |
994 | ppa32 |= ppa64.g.ch << pblk->ppaf.ch_offset; | |
995 | ppa32 |= ppa64.g.pl << pblk->ppaf.pln_offset; | |
996 | ppa32 |= ppa64.g.sec << pblk->ppaf.sec_offset; | |
997 | } | |
998 | ||
999 | return ppa32; | |
1000 | } | |
1001 | ||
1002 | static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba, | |
1003 | struct ppa_addr ppa) | |
1004 | { | |
1005 | if (pblk->ppaf_bitsize < 32) { | |
1006 | u32 *map = (u32 *)pblk->trans_map; | |
1007 | ||
1008 | map[lba] = pblk_ppa64_to_ppa32(pblk, ppa); | |
1009 | } else { | |
1010 | u64 *map = (u64 *)pblk->trans_map; | |
1011 | ||
1012 | map[lba] = ppa.ppa; | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk, | |
1017 | struct ppa_addr p) | |
1018 | { | |
1019 | u64 paddr; | |
1020 | ||
1021 | paddr = 0; | |
1022 | paddr |= (u64)p.g.pg << pblk->ppaf.pg_offset; | |
1023 | paddr |= (u64)p.g.lun << pblk->ppaf.lun_offset; | |
1024 | paddr |= (u64)p.g.ch << pblk->ppaf.ch_offset; | |
1025 | paddr |= (u64)p.g.pl << pblk->ppaf.pln_offset; | |
1026 | paddr |= (u64)p.g.sec << pblk->ppaf.sec_offset; | |
1027 | ||
1028 | return paddr; | |
1029 | } | |
1030 | ||
1031 | static inline int pblk_ppa_empty(struct ppa_addr ppa_addr) | |
1032 | { | |
1033 | return (ppa_addr.ppa == ADDR_EMPTY); | |
1034 | } | |
1035 | ||
1036 | static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr) | |
1037 | { | |
1038 | ppa_addr->ppa = ADDR_EMPTY; | |
1039 | } | |
1040 | ||
1041 | static inline bool pblk_ppa_comp(struct ppa_addr lppa, struct ppa_addr rppa) | |
1042 | { | |
1043 | if (lppa.ppa == rppa.ppa) | |
1044 | return true; | |
1045 | ||
1046 | return false; | |
1047 | } | |
1048 | ||
1049 | static inline int pblk_addr_in_cache(struct ppa_addr ppa) | |
1050 | { | |
1051 | return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached); | |
1052 | } | |
1053 | ||
1054 | static inline int pblk_addr_to_cacheline(struct ppa_addr ppa) | |
1055 | { | |
1056 | return ppa.c.line; | |
1057 | } | |
1058 | ||
1059 | static inline struct ppa_addr pblk_cacheline_to_addr(int addr) | |
1060 | { | |
1061 | struct ppa_addr p; | |
1062 | ||
1063 | p.c.line = addr; | |
1064 | p.c.is_cached = 1; | |
1065 | ||
1066 | return p; | |
1067 | } | |
1068 | ||
1069 | static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr, | |
1070 | u64 line_id) | |
1071 | { | |
1072 | struct ppa_addr ppa; | |
1073 | ||
1074 | ppa.ppa = 0; | |
1075 | ppa.g.blk = line_id; | |
1076 | ppa.g.pg = (paddr & pblk->ppaf.pg_mask) >> pblk->ppaf.pg_offset; | |
1077 | ppa.g.lun = (paddr & pblk->ppaf.lun_mask) >> pblk->ppaf.lun_offset; | |
1078 | ppa.g.ch = (paddr & pblk->ppaf.ch_mask) >> pblk->ppaf.ch_offset; | |
1079 | ppa.g.pl = (paddr & pblk->ppaf.pln_mask) >> pblk->ppaf.pln_offset; | |
1080 | ppa.g.sec = (paddr & pblk->ppaf.sec_mask) >> pblk->ppaf.sec_offset; | |
1081 | ||
1082 | return ppa; | |
1083 | } | |
1084 | ||
1085 | static inline struct ppa_addr addr_to_pblk_ppa(struct pblk *pblk, u64 paddr, | |
1086 | u64 line_id) | |
1087 | { | |
1088 | struct ppa_addr ppa; | |
1089 | ||
1090 | ppa = addr_to_gen_ppa(pblk, paddr, line_id); | |
1091 | ||
1092 | return ppa; | |
1093 | } | |
1094 | ||
1095 | static inline u32 pblk_calc_meta_header_crc(struct pblk *pblk, | |
1096 | struct line_header *header) | |
1097 | { | |
1098 | u32 crc = ~(u32)0; | |
1099 | ||
1100 | crc = crc32_le(crc, (unsigned char *)header + sizeof(crc), | |
1101 | sizeof(struct line_header) - sizeof(crc)); | |
1102 | ||
1103 | return crc; | |
1104 | } | |
1105 | ||
1106 | static inline u32 pblk_calc_smeta_crc(struct pblk *pblk, | |
1107 | struct line_smeta *smeta) | |
1108 | { | |
1109 | struct pblk_line_meta *lm = &pblk->lm; | |
1110 | u32 crc = ~(u32)0; | |
1111 | ||
1112 | crc = crc32_le(crc, (unsigned char *)smeta + | |
1113 | sizeof(struct line_header) + sizeof(crc), | |
1114 | lm->smeta_len - | |
1115 | sizeof(struct line_header) - sizeof(crc)); | |
1116 | ||
1117 | return crc; | |
1118 | } | |
1119 | ||
1120 | static inline u32 pblk_calc_emeta_crc(struct pblk *pblk, | |
1121 | struct line_emeta *emeta) | |
1122 | { | |
1123 | struct pblk_line_meta *lm = &pblk->lm; | |
1124 | u32 crc = ~(u32)0; | |
1125 | ||
1126 | crc = crc32_le(crc, (unsigned char *)emeta + | |
1127 | sizeof(struct line_header) + sizeof(crc), | |
1128 | lm->emeta_len[0] - | |
1129 | sizeof(struct line_header) - sizeof(crc)); | |
1130 | ||
1131 | return crc; | |
1132 | } | |
1133 | ||
1134 | static inline int pblk_set_progr_mode(struct pblk *pblk, int type) | |
1135 | { | |
1136 | struct nvm_tgt_dev *dev = pblk->dev; | |
1137 | struct nvm_geo *geo = &dev->geo; | |
1138 | int flags; | |
1139 | ||
1140 | flags = geo->plane_mode >> 1; | |
1141 | ||
1142 | if (type == PBLK_WRITE) | |
1143 | flags |= NVM_IO_SCRAMBLE_ENABLE; | |
1144 | ||
1145 | return flags; | |
1146 | } | |
1147 | ||
1148 | enum { | |
1149 | PBLK_READ_RANDOM = 0, | |
1150 | PBLK_READ_SEQUENTIAL = 1, | |
1151 | }; | |
1152 | ||
1153 | static inline int pblk_set_read_mode(struct pblk *pblk, int type) | |
1154 | { | |
1155 | struct nvm_tgt_dev *dev = pblk->dev; | |
1156 | struct nvm_geo *geo = &dev->geo; | |
1157 | int flags; | |
1158 | ||
1159 | flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE; | |
1160 | if (type == PBLK_READ_SEQUENTIAL) | |
1161 | flags |= geo->plane_mode >> 1; | |
1162 | ||
1163 | return flags; | |
1164 | } | |
1165 | ||
1166 | static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs) | |
1167 | { | |
1168 | return !(nr_secs % pblk->min_write_pgs); | |
1169 | } | |
1170 | ||
1171 | #ifdef CONFIG_NVM_DEBUG | |
1172 | static inline void print_ppa(struct ppa_addr *p, char *msg, int error) | |
1173 | { | |
1174 | if (p->c.is_cached) { | |
1175 | pr_err("ppa: (%s: %x) cache line: %llu\n", | |
1176 | msg, error, (u64)p->c.line); | |
1177 | } else { | |
1178 | pr_err("ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n", | |
1179 | msg, error, | |
1180 | p->g.ch, p->g.lun, p->g.blk, | |
1181 | p->g.pg, p->g.pl, p->g.sec); | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd, | |
1186 | int error) | |
1187 | { | |
1188 | int bit = -1; | |
1189 | ||
1190 | if (rqd->nr_ppas == 1) { | |
1191 | print_ppa(&rqd->ppa_addr, "rqd", error); | |
1192 | return; | |
1193 | } | |
1194 | ||
1195 | while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas, | |
1196 | bit + 1)) < rqd->nr_ppas) { | |
1197 | print_ppa(&rqd->ppa_list[bit], "rqd", error); | |
1198 | } | |
1199 | ||
1200 | pr_err("error:%d, ppa_status:%llx\n", error, rqd->ppa_status); | |
1201 | } | |
1202 | ||
1203 | static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev, | |
1204 | struct ppa_addr *ppas, int nr_ppas) | |
1205 | { | |
1206 | struct nvm_geo *geo = &tgt_dev->geo; | |
1207 | struct ppa_addr *ppa; | |
1208 | int i; | |
1209 | ||
1210 | for (i = 0; i < nr_ppas; i++) { | |
1211 | ppa = &ppas[i]; | |
1212 | ||
1213 | if (!ppa->c.is_cached && | |
1214 | ppa->g.ch < geo->nr_chnls && | |
1215 | ppa->g.lun < geo->luns_per_chnl && | |
1216 | ppa->g.pl < geo->nr_planes && | |
1217 | ppa->g.blk < geo->blks_per_lun && | |
1218 | ppa->g.pg < geo->pgs_per_blk && | |
1219 | ppa->g.sec < geo->sec_per_pg) | |
1220 | continue; | |
1221 | ||
1222 | print_ppa(ppa, "boundary", i); | |
1223 | ||
1224 | return 1; | |
1225 | } | |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd) | |
1230 | { | |
1231 | struct nvm_tgt_dev *dev = pblk->dev; | |
1232 | struct ppa_addr *ppa_list; | |
1233 | ||
1234 | ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr; | |
1235 | ||
1236 | if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) { | |
1237 | WARN_ON(1); | |
1238 | return -EINVAL; | |
1239 | } | |
1240 | ||
1241 | if (rqd->opcode == NVM_OP_PWRITE) { | |
1242 | struct pblk_line *line; | |
1243 | struct ppa_addr ppa; | |
1244 | int i; | |
1245 | ||
1246 | for (i = 0; i < rqd->nr_ppas; i++) { | |
1247 | ppa = ppa_list[i]; | |
1248 | line = &pblk->lines[pblk_dev_ppa_to_line(ppa)]; | |
1249 | ||
1250 | spin_lock(&line->lock); | |
1251 | if (line->state != PBLK_LINESTATE_OPEN) { | |
1252 | pr_err("pblk: bad ppa: line:%d,state:%d\n", | |
1253 | line->id, line->state); | |
1254 | WARN_ON(1); | |
1255 | spin_unlock(&line->lock); | |
1256 | return -EINVAL; | |
1257 | } | |
1258 | spin_unlock(&line->lock); | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | return 0; | |
1263 | } | |
1264 | #endif | |
1265 | ||
1266 | static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr) | |
1267 | { | |
1268 | struct pblk_line_meta *lm = &pblk->lm; | |
1269 | ||
1270 | if (paddr > lm->sec_per_line) | |
1271 | return 1; | |
1272 | ||
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | static inline unsigned int pblk_get_bi_idx(struct bio *bio) | |
1277 | { | |
1278 | return bio->bi_iter.bi_idx; | |
1279 | } | |
1280 | ||
1281 | static inline sector_t pblk_get_lba(struct bio *bio) | |
1282 | { | |
1283 | return bio->bi_iter.bi_sector / NR_PHY_IN_LOG; | |
1284 | } | |
1285 | ||
1286 | static inline unsigned int pblk_get_secs(struct bio *bio) | |
1287 | { | |
1288 | return bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE; | |
1289 | } | |
1290 | ||
1291 | static inline sector_t pblk_get_sector(sector_t lba) | |
1292 | { | |
1293 | return lba * NR_PHY_IN_LOG; | |
1294 | } | |
1295 | ||
1296 | static inline void pblk_setup_uuid(struct pblk *pblk) | |
1297 | { | |
1298 | uuid_le uuid; | |
1299 | ||
1300 | uuid_le_gen(&uuid); | |
1301 | memcpy(pblk->instance_uuid, uuid.b, 16); | |
1302 | } | |
1303 | #endif /* PBLK_H_ */ |