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Merge tag 'ntb-4.13-bugfixes' of git://github.com/jonmason/ntb
[mirror_ubuntu-artful-kernel.git] / drivers / lightnvm / pblk.h
CommitLineData
a4bd217b
JG		 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
ef576494
JG		 43#define PBLK_WS_POOL_SIZE (128)
44#define PBLK_META_POOL_SIZE (128)
45#define PBLK_READ_REQ_POOL_SIZE (1024)
46
47#define PBLK_NR_CLOSE_JOBS (4)
48
a4bd217b
JG		 49#define PBLK_CACHE_NAME_LEN (DISK_NAME_LEN + 16)
50
51#define PBLK_COMMAND_TIMEOUT_MS 30000
52
53/* Max 512 LUNs per device */
54#define PBLK_MAX_LUNS_BITMAP (4)
55
56#define NR_PHY_IN_LOG (PBLK_EXPOSED_PAGE_SIZE / PBLK_SECTOR)
57
58#define pblk_for_each_lun(pblk, rlun, i) \
59 for ((i) = 0, rlun = &(pblk)->luns[0]; \
60 (i) < (pblk)->nr_luns; (i)++, rlun = &(pblk)->luns[(i)])
61
62#define ERASE 2 /* READ = 0, WRITE = 1 */
63
64enum {
65 /* IO Types */
66 PBLK_IOTYPE_USER = 1 << 0,
67 PBLK_IOTYPE_GC = 1 << 1,
68
69 /* Write buffer flags */
70 PBLK_FLUSH_ENTRY = 1 << 2,
71 PBLK_WRITTEN_DATA = 1 << 3,
72 PBLK_SUBMITTED_ENTRY = 1 << 4,
73 PBLK_WRITABLE_ENTRY = 1 << 5,
74};
75
76enum {
77 PBLK_BLK_ST_OPEN = 0x1,
78 PBLK_BLK_ST_CLOSED = 0x2,
79};
80
b20ba1bc
JG		 81struct pblk_sec_meta {
82 u64 reserved;
83 __le64 lba;
84};
85
a4bd217b
JG		 86/* The number of GC lists and the rate-limiter states go together. This way the
87 * rate-limiter can dictate how much GC is needed based on resource utilization.
88 */
b20ba1bc 89#define PBLK_GC_NR_LISTS 3
a4bd217b
JG		 90
91enum {
92 PBLK_RL_HIGH = 1,
93 PBLK_RL_MID = 2,
94 PBLK_RL_LOW = 3,
95};
96
a4bd217b
JG		 97#define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS)
98
084ec9ba 99/* write buffer completion context */
a4bd217b
JG		 100struct pblk_c_ctx {
101 struct list_head list; /* Head for out-of-order completion */
102
103 unsigned long *lun_bitmap; /* Luns used on current request */
104 unsigned int sentry;
105 unsigned int nr_valid;
106 unsigned int nr_padded;
107};
108
084ec9ba
JG		 109/* generic context */
110struct pblk_g_ctx {
111 void *private;
a4bd217b
JG		 112};
113
ee8d5c1a
JG		 114/* Pad context */
115struct pblk_pad_rq {
116 struct pblk *pblk;
117 struct completion wait;
118 struct kref ref;
119};
120
a4bd217b
JG		 121/* Recovery context */
122struct pblk_rec_ctx {
123 struct pblk *pblk;
124 struct nvm_rq *rqd;
125 struct list_head failed;
126 struct work_struct ws_rec;
127};
128
129/* Write context */
130struct pblk_w_ctx {
131 struct bio_list bios; /* Original bios - used for completion
132 * in REQ_FUA, REQ_FLUSH case
133 */
ef697902 134 u64 lba; /* Logic addr. associated with entry */
a4bd217b
JG		 135 struct ppa_addr ppa; /* Physic addr. associated with entry */
136 int flags; /* Write context flags */
137};
138
139struct pblk_rb_entry {
140 struct ppa_addr cacheline; /* Cacheline for this entry */
141 void *data; /* Pointer to data on this entry */
142 struct pblk_w_ctx w_ctx; /* Context for this entry */
143 struct list_head index; /* List head to enable indexes */
144};
145
146#define EMPTY_ENTRY (~0U)
147
148struct pblk_rb_pages {
149 struct page *pages;
150 int order;
151 struct list_head list;
152};
153
154struct pblk_rb {
155 struct pblk_rb_entry *entries; /* Ring buffer entries */
156 unsigned int mem; /* Write offset - points to next
157 * writable entry in memory
158 */
159 unsigned int subm; /* Read offset - points to last entry
160 * that has been submitted to the media
161 * to be persisted
162 */
163 unsigned int sync; /* Synced - backpointer that signals
164 * the last submitted entry that has
165 * been successfully persisted to media
166 */
167 unsigned int sync_point; /* Sync point - last entry that must be
168 * flushed to the media. Used with
169 * REQ_FLUSH and REQ_FUA
170 */
171 unsigned int l2p_update; /* l2p update point - next entry for
172 * which l2p mapping will be updated to
173 * contain a device ppa address (instead
174 * of a cacheline
175 */
176 unsigned int nr_entries; /* Number of entries in write buffer -
177 * must be a power of two
178 */
179 unsigned int seg_size; /* Size of the data segments being
180 * stored on each entry. Typically this
181 * will be 4KB
182 */
183
184 struct list_head pages; /* List of data pages */
185
186 spinlock_t w_lock; /* Write lock */
187 spinlock_t s_lock; /* Sync lock */
188
189#ifdef CONFIG_NVM_DEBUG
190 atomic_t inflight_sync_point; /* Not served REQ_FLUSH | REQ_FUA */
191#endif
192};
193
194#define PBLK_RECOVERY_SECTORS 16
195
196struct pblk_lun {
197 struct ppa_addr bppa;
198
199 u8 *bb_list; /* Bad block list for LUN. Only used on
200 * bring up. Bad blocks are managed
201 * within lines on run-time.
202 */
203
204 struct semaphore wr_sem;
205};
206
207struct pblk_gc_rq {
208 struct pblk_line *line;
209 void *data;
b20ba1bc 210 u64 lba_list[PBLK_MAX_REQ_ADDRS];
a4bd217b
JG		 211 int nr_secs;
212 int secs_to_gc;
213 struct list_head list;
214};
215
216struct pblk_gc {
b20ba1bc
JG		 217 /* These states are not protected by a lock since (i) they are in the
218 * fast path, and (ii) they are not critical.
219 */
a4bd217b
JG		 220 int gc_active;
221 int gc_enabled;
222 int gc_forced;
a4bd217b
JG		 223
224 struct task_struct *gc_ts;
225 struct task_struct *gc_writer_ts;
b20ba1bc
JG		 226 struct task_struct *gc_reader_ts;
227
228 struct workqueue_struct *gc_line_reader_wq;
a4bd217b 229 struct workqueue_struct *gc_reader_wq;
b20ba1bc 230
a4bd217b
JG		 231 struct timer_list gc_timer;
232
b20ba1bc
JG		 233 struct semaphore gc_sem;
234 atomic_t inflight_gc;
a4bd217b 235 int w_entries;
b20ba1bc 236
a4bd217b 237 struct list_head w_list;
b20ba1bc 238 struct list_head r_list;
a4bd217b
JG		 239
240 spinlock_t lock;
241 spinlock_t w_lock;
b20ba1bc 242 spinlock_t r_lock;
a4bd217b
JG		 243};
244
245struct pblk_rl {
246 unsigned int high; /* Upper threshold for rate limiter (free run -
247 * user I/O rate limiter
248 */
249 unsigned int low; /* Lower threshold for rate limiter (user I/O
250 * rate limiter - stall)
251 */
252 unsigned int high_pw; /* High rounded up as a power of 2 */
253
b20ba1bc
JG		 254#define PBLK_USER_HIGH_THRS 8 /* Begin write limit at 12% available blks */
255#define PBLK_USER_LOW_THRS 10 /* Aggressive GC at 10% available blocks */
a4bd217b
JG		 256
257 int rb_windows_pw; /* Number of rate windows in the write buffer
258 * given as a power-of-2. This guarantees that
259 * when user I/O is being rate limited, there
260 * will be reserved enough space for the GC to
261 * place its payload. A window is of
262 * pblk->max_write_pgs size, which in NVMe is
263 * 64, i.e., 256kb.
264 */
265 int rb_budget; /* Total number of entries available for I/O */
266 int rb_user_max; /* Max buffer entries available for user I/O */
a4bd217b
JG		 267 int rb_gc_max; /* Max buffer entries available for GC I/O */
268 int rb_gc_rsv; /* Reserved buffer entries for GC I/O */
269 int rb_state; /* Rate-limiter current state */
588726d3
JG		 270
271 atomic_t rb_user_cnt; /* User I/O buffer counter */
a4bd217b 272 atomic_t rb_gc_cnt; /* GC I/O buffer counter */
588726d3 273 atomic_t rb_space; /* Space limit in case of reaching capacity */
a4bd217b 274
b20ba1bc
JG		 275 int rsv_blocks; /* Reserved blocks for GC */
276
a4bd217b 277 int rb_user_active;
b20ba1bc
JG		 278 int rb_gc_active;
279
a4bd217b
JG		 280 struct timer_list u_timer;
281
282 unsigned long long nr_secs;
283 unsigned long total_blocks;
284 atomic_t free_blocks;
285};
286
a4bd217b
JG		 287#define PBLK_LINE_EMPTY (~0U)
288
289enum {
290 /* Line Types */
291 PBLK_LINETYPE_FREE = 0,
292 PBLK_LINETYPE_LOG = 1,
293 PBLK_LINETYPE_DATA = 2,
294
295 /* Line state */
296 PBLK_LINESTATE_FREE = 10,
297 PBLK_LINESTATE_OPEN = 11,
298 PBLK_LINESTATE_CLOSED = 12,
299 PBLK_LINESTATE_GC = 13,
300 PBLK_LINESTATE_BAD = 14,
301 PBLK_LINESTATE_CORRUPT = 15,
302
303 /* GC group */
304 PBLK_LINEGC_NONE = 20,
305 PBLK_LINEGC_EMPTY = 21,
306 PBLK_LINEGC_LOW = 22,
307 PBLK_LINEGC_MID = 23,
308 PBLK_LINEGC_HIGH = 24,
309 PBLK_LINEGC_FULL = 25,
310};
311
312#define PBLK_MAGIC 0x70626c6b /*pblk*/
313
314struct line_header {
315 __le32 crc;
316 __le32 identifier; /* pblk identifier */
317 __u8 uuid[16]; /* instance uuid */
318 __le16 type; /* line type */
319 __le16 version; /* type version */
320 __le32 id; /* line id for current line */
321};
322
323struct line_smeta {
324 struct line_header header;
325
326 __le32 crc; /* Full structure including struct crc */
327 /* Previous line metadata */
328 __le32 prev_id; /* Line id for previous line */
329
330 /* Current line metadata */
331 __le64 seq_nr; /* Sequence number for current line */
332
333 /* Active writers */
334 __le32 window_wr_lun; /* Number of parallel LUNs to write */
335
336 __le32 rsvd[2];
dd2a4343
JG		 337
338 __le64 lun_bitmap[];
a4bd217b
JG		 339};
340
341/*
dd2a4343
JG		 342 * Metadata layout in media:
343 * First sector:
344 * 1. struct line_emeta
345 * 2. bad block bitmap (u64 * window_wr_lun)
346 * Mid sectors (start at lbas_sector):
347 * 3. nr_lbas (u64) forming lba list
348 * Last sectors (start at vsc_sector):
349 * 4. u32 valid sector count (vsc) for all lines (~0U: free line)
a4bd217b
JG		 350 */
351struct line_emeta {
352 struct line_header header;
353
354 __le32 crc; /* Full structure including struct crc */
355
356 /* Previous line metadata */
357 __le32 prev_id; /* Line id for prev line */
358
359 /* Current line metadata */
360 __le64 seq_nr; /* Sequence number for current line */
361
362 /* Active writers */
363 __le32 window_wr_lun; /* Number of parallel LUNs to write */
364
365 /* Bookkeeping for recovery */
366 __le32 next_id; /* Line id for next line */
367 __le64 nr_lbas; /* Number of lbas mapped in line */
368 __le64 nr_valid_lbas; /* Number of valid lbas mapped in line */
dd2a4343
JG		 369 __le64 bb_bitmap[]; /* Updated bad block bitmap for line */
370};
371
372struct pblk_emeta {
373 struct line_emeta *buf; /* emeta buffer in media format */
374 int mem; /* Write offset - points to next
375 * writable entry in memory
376 */
377 atomic_t sync; /* Synced - backpointer that signals the
378 * last entry that has been successfully
379 * persisted to media
380 */
381 unsigned int nr_entries; /* Number of emeta entries */
382};
383
384struct pblk_smeta {
385 struct line_smeta *buf; /* smeta buffer in persistent format */
a4bd217b
JG		 386};
387
388struct pblk_line {
389 struct pblk *pblk;
390 unsigned int id; /* Line number corresponds to the
391 * block line
392 */
393 unsigned int seq_nr; /* Unique line sequence number */
394
395 int state; /* PBLK_LINESTATE_X */
396 int type; /* PBLK_LINETYPE_X */
397 int gc_group; /* PBLK_LINEGC_X */
398 struct list_head list; /* Free, GC lists */
399
400 unsigned long *lun_bitmap; /* Bitmap for LUNs mapped in line */
401
dd2a4343
JG		 402 struct pblk_smeta *smeta; /* Start metadata */
403 struct pblk_emeta *emeta; /* End medatada */
404
a4bd217b 405 int meta_line; /* Metadata line id */
dd2a4343
JG		 406 int meta_distance; /* Distance between data and metadata */
407
a4bd217b
JG		 408 u64 smeta_ssec; /* Sector where smeta starts */
409 u64 emeta_ssec; /* Sector where emeta starts */
410
411 unsigned int sec_in_line; /* Number of usable secs in line */
412
a44f53fa 413 atomic_t blk_in_line; /* Number of good blocks in line */
a4bd217b
JG		 414 unsigned long *blk_bitmap; /* Bitmap for valid/invalid blocks */
415 unsigned long *erase_bitmap; /* Bitmap for erased blocks */
416
417 unsigned long *map_bitmap; /* Bitmap for mapped sectors in line */
418 unsigned long *invalid_bitmap; /* Bitmap for invalid sectors in line */
419
a44f53fa 420 atomic_t left_eblks; /* Blocks left for erasing */
a4bd217b
JG		 421 atomic_t left_seblks; /* Blocks left for sync erasing */
422
423 int left_msecs; /* Sectors left for mapping */
a4bd217b 424 unsigned int cur_sec; /* Sector map pointer */
dd2a4343
JG		 425 unsigned int nr_valid_lbas; /* Number of valid lbas in line */
426
427 __le32 *vsc; /* Valid sector count in line */
a4bd217b
JG		 428
429 struct kref ref; /* Write buffer L2P references */
430
431 spinlock_t lock; /* Necessary for invalid_bitmap only */
432};
433
a44f53fa 434#define PBLK_DATA_LINES 4
a4bd217b 435
dd2a4343 436enum {
a4bd217b
JG		 437 PBLK_KMALLOC_META = 1,
438 PBLK_VMALLOC_META = 2,
439};
440
dd2a4343
JG		 441enum {
442 PBLK_EMETA_TYPE_HEADER = 1, /* struct line_emeta first sector */
443 PBLK_EMETA_TYPE_LLBA = 2, /* lba list - type: __le64 */
444 PBLK_EMETA_TYPE_VSC = 3, /* vsc list - type: __le32 */
a4bd217b
JG		 445};
446
447struct pblk_line_mgmt {
448 int nr_lines; /* Total number of full lines */
449 int nr_free_lines; /* Number of full lines in free list */
450
451 /* Free lists - use free_lock */
452 struct list_head free_list; /* Full lines ready to use */
453 struct list_head corrupt_list; /* Full lines corrupted */
454 struct list_head bad_list; /* Full lines bad */
455
456 /* GC lists - use gc_lock */
b20ba1bc 457 struct list_head *gc_lists[PBLK_GC_NR_LISTS];
a4bd217b
JG		 458 struct list_head gc_high_list; /* Full lines ready to GC, high isc */
459 struct list_head gc_mid_list; /* Full lines ready to GC, mid isc */
460 struct list_head gc_low_list; /* Full lines ready to GC, low isc */
461
462 struct list_head gc_full_list; /* Full lines ready to GC, no valid */
463 struct list_head gc_empty_list; /* Full lines close, all valid */
464
465 struct pblk_line *log_line; /* Current FTL log line */
466 struct pblk_line *data_line; /* Current data line */
467 struct pblk_line *log_next; /* Next FTL log line */
468 struct pblk_line *data_next; /* Next data line */
469
dd2a4343
JG		 470 struct list_head emeta_list; /* Lines queued to schedule emeta */
471
472 __le32 *vsc_list; /* Valid sector counts for all lines */
473
a4bd217b 474 /* Metadata allocation type: VMALLOC | KMALLOC */
a4bd217b
JG		 475 int emeta_alloc_type;
476
477 /* Pre-allocated metadata for data lines */
dd2a4343
JG		 478 struct pblk_smeta *sline_meta[PBLK_DATA_LINES];
479 struct pblk_emeta *eline_meta[PBLK_DATA_LINES];
a4bd217b
JG		 480 unsigned long meta_bitmap;
481
482 /* Helpers for fast bitmap calculations */
483 unsigned long *bb_template;
484 unsigned long *bb_aux;
485
486 unsigned long d_seq_nr; /* Data line unique sequence number */
487 unsigned long l_seq_nr; /* Log line unique sequence number */
488
489 spinlock_t free_lock;
dd2a4343 490 spinlock_t close_lock;
a4bd217b
JG		 491 spinlock_t gc_lock;
492};
493
494struct pblk_line_meta {
495 unsigned int smeta_len; /* Total length for smeta */
dd2a4343
JG		 496 unsigned int smeta_sec; /* Sectors needed for smeta */
497
498 unsigned int emeta_len[4]; /* Lengths for emeta:
499 * [0]: Total length
500 * [1]: struct line_emeta length
501 * [2]: L2P portion length
502 * [3]: vsc list length
503 */
504 unsigned int emeta_sec[4]; /* Sectors needed for emeta. Same layout
505 * as emeta_len
506 */
507
a4bd217b 508 unsigned int emeta_bb; /* Boundary for bb that affects emeta */
dd2a4343
JG		 509
510 unsigned int vsc_list_len; /* Length for vsc list */
a4bd217b
JG		 511 unsigned int sec_bitmap_len; /* Length for sector bitmap in line */
512 unsigned int blk_bitmap_len; /* Length for block bitmap in line */
513 unsigned int lun_bitmap_len; /* Length for lun bitmap in line */
514
515 unsigned int blk_per_line; /* Number of blocks in a full line */
516 unsigned int sec_per_line; /* Number of sectors in a line */
dd2a4343 517 unsigned int dsec_per_line; /* Number of data sectors in a line */
a4bd217b
JG		 518 unsigned int min_blk_line; /* Min. number of good blocks in line */
519
520 unsigned int mid_thrs; /* Threshold for GC mid list */
521 unsigned int high_thrs; /* Threshold for GC high list */
dd2a4343
JG		 522
523 unsigned int meta_distance; /* Distance between data and metadata */
a4bd217b
JG		 524};
525
526struct pblk_addr_format {
527 u64 ch_mask;
528 u64 lun_mask;
529 u64 pln_mask;
530 u64 blk_mask;
531 u64 pg_mask;
532 u64 sec_mask;
533 u8 ch_offset;
534 u8 lun_offset;
535 u8 pln_offset;
536 u8 blk_offset;
537 u8 pg_offset;
538 u8 sec_offset;
539};
540
588726d3
JG		 541enum {
542 PBLK_STATE_RUNNING = 0,
543 PBLK_STATE_STOPPING = 1,
544 PBLK_STATE_RECOVERING = 2,
545 PBLK_STATE_STOPPED = 3,
546};
547
a4bd217b
JG		 548struct pblk {
549 struct nvm_tgt_dev *dev;
550 struct gendisk *disk;
551
552 struct kobject kobj;
553
554 struct pblk_lun *luns;
555
556 struct pblk_line *lines; /* Line array */
557 struct pblk_line_mgmt l_mg; /* Line management */
558 struct pblk_line_meta lm; /* Line metadata */
559
560 int ppaf_bitsize;
561 struct pblk_addr_format ppaf;
562
563 struct pblk_rb rwb;
564
588726d3
JG		 565 int state; /* pblk line state */
566
a4bd217b
JG		 567 int min_write_pgs; /* Minimum amount of pages required by controller */
568 int max_write_pgs; /* Maximum amount of pages supported by controller */
569 int pgs_in_buffer; /* Number of pages that need to be held in buffer to
570 * guarantee successful reads.
571 */
572
573 sector_t capacity; /* Device capacity when bad blocks are subtracted */
574 int over_pct; /* Percentage of device used for over-provisioning */
575
576 /* pblk provisioning values. Used by rate limiter */
577 struct pblk_rl rl;
578
c2e9f5d4 579 int sec_per_write;
a4bd217b
JG		 580
581 unsigned char instance_uuid[16];
582#ifdef CONFIG_NVM_DEBUG
583 /* All debug counters apply to 4kb sector I/Os */
584 atomic_long_t inflight_writes; /* Inflight writes (user and gc) */
585 atomic_long_t padded_writes; /* Sectors padded due to flush/fua */
586 atomic_long_t padded_wb; /* Sectors padded in write buffer */
587 atomic_long_t nr_flush; /* Number of flush/fua I/O */
588 atomic_long_t req_writes; /* Sectors stored on write buffer */
589 atomic_long_t sub_writes; /* Sectors submitted from buffer */
590 atomic_long_t sync_writes; /* Sectors synced to media */
a4bd217b 591 atomic_long_t inflight_reads; /* Inflight sector read requests */
db7ada33 592 atomic_long_t cache_reads; /* Read requests that hit the cache */
a4bd217b
JG		 593 atomic_long_t sync_reads; /* Completed sector read requests */
594 atomic_long_t recov_writes; /* Sectors submitted from recovery */
595 atomic_long_t recov_gc_writes; /* Sectors submitted from write GC */
596 atomic_long_t recov_gc_reads; /* Sectors submitted from read GC */
597#endif
598
599 spinlock_t lock;
600
601 atomic_long_t read_failed;
602 atomic_long_t read_empty;
603 atomic_long_t read_high_ecc;
604 atomic_long_t read_failed_gc;
605 atomic_long_t write_failed;
606 atomic_long_t erase_failed;
607
588726d3
JG		 608 atomic_t inflight_io; /* General inflight I/O counter */
609
a4bd217b
JG		 610 struct task_struct *writer_ts;
611
612 /* Simple translation map of logical addresses to physical addresses.
613 * The logical addresses is known by the host system, while the physical
614 * addresses are used when writing to the disk block device.
615 */
616 unsigned char *trans_map;
617 spinlock_t trans_lock;
618
619 struct list_head compl_list;
620
621 mempool_t *page_pool;
622 mempool_t *line_ws_pool;
623 mempool_t *rec_pool;
084ec9ba 624 mempool_t *g_rq_pool;
a4bd217b
JG		 625 mempool_t *w_rq_pool;
626 mempool_t *line_meta_pool;
627
ef576494
JG		 628 struct workqueue_struct *close_wq;
629 struct workqueue_struct *bb_wq;
630
a4bd217b
JG		 631 struct timer_list wtimer;
632
633 struct pblk_gc gc;
634};
635
636struct pblk_line_ws {
637 struct pblk *pblk;
638 struct pblk_line *line;
639 void *priv;
640 struct work_struct ws;
641};
642
084ec9ba 643#define pblk_g_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_g_ctx))
a4bd217b
JG		 644#define pblk_w_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_c_ctx))
645
646/*
647 * pblk ring buffer operations
648 */
649int pblk_rb_init(struct pblk_rb *rb, struct pblk_rb_entry *rb_entry_base,
650 unsigned int power_size, unsigned int power_seg_sz);
651unsigned int pblk_rb_calculate_size(unsigned int nr_entries);
652void *pblk_rb_entries_ref(struct pblk_rb *rb);
653int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio,
654 unsigned int nr_entries, unsigned int *pos);
655int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries,
656 unsigned int *pos);
657void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data,
658 struct pblk_w_ctx w_ctx, unsigned int pos);
659void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data,
660 struct pblk_w_ctx w_ctx, struct pblk_line *gc_line,
661 unsigned int pos);
662struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos);
588726d3 663void pblk_rb_flush(struct pblk_rb *rb);
a4bd217b
JG		 664
665void pblk_rb_sync_l2p(struct pblk_rb *rb);
d624f371
JG		 666unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd,
667 struct bio *bio, unsigned int pos,
668 unsigned int nr_entries, unsigned int count);
a4bd217b
JG		 669unsigned int pblk_rb_read_to_bio_list(struct pblk_rb *rb, struct bio *bio,
670 struct list_head *list,
671 unsigned int max);
672int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba,
75cb8e93 673 struct ppa_addr ppa, int bio_iter, bool advanced_bio);
a4bd217b
JG		 674unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries);
675
676unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags);
677unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries);
678struct pblk_rb_entry *pblk_rb_sync_scan_entry(struct pblk_rb *rb,
679 struct ppa_addr *ppa);
680void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags);
681unsigned int pblk_rb_sync_point_count(struct pblk_rb *rb);
682
683unsigned int pblk_rb_read_count(struct pblk_rb *rb);
ee8d5c1a 684unsigned int pblk_rb_sync_count(struct pblk_rb *rb);
a4bd217b
JG		 685unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos);
686
687int pblk_rb_tear_down_check(struct pblk_rb *rb);
688int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos);
689void pblk_rb_data_free(struct pblk_rb *rb);
690ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf);
691
692/*
693 * pblk core
694 */
695struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int rw);
c2e9f5d4 696void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write);
a4bd217b
JG		 697int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd,
698 struct pblk_c_ctx *c_ctx);
699void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int rw);
588726d3 700void pblk_wait_for_meta(struct pblk *pblk);
a4bd217b
JG		 701struct ppa_addr pblk_get_lba_map(struct pblk *pblk, sector_t lba);
702void pblk_discard(struct pblk *pblk, struct bio *bio);
703void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd);
704void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd);
705int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd);
dd2a4343 706int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
a4bd217b
JG		 707struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
708 unsigned int nr_secs, unsigned int len,
de54e703 709 int alloc_type, gfp_t gfp_mask);
a4bd217b
JG		 710struct pblk_line *pblk_line_get(struct pblk *pblk);
711struct pblk_line *pblk_line_get_first_data(struct pblk *pblk);
588726d3 712void pblk_line_replace_data(struct pblk *pblk);
a4bd217b
JG		 713int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line);
714void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line);
715struct pblk_line *pblk_line_get_data(struct pblk *pblk);
d624f371 716struct pblk_line *pblk_line_get_erase(struct pblk *pblk);
a4bd217b
JG		 717int pblk_line_erase(struct pblk *pblk, struct pblk_line *line);
718int pblk_line_is_full(struct pblk_line *line);
719void pblk_line_free(struct pblk *pblk, struct pblk_line *line);
dd2a4343 720void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line);
a4bd217b 721void pblk_line_close(struct pblk *pblk, struct pblk_line *line);
588726d3 722void pblk_line_close_meta_sync(struct pblk *pblk);
dd2a4343 723void pblk_line_close_ws(struct work_struct *work);
588726d3 724void pblk_pipeline_stop(struct pblk *pblk);
a4bd217b
JG		 725void pblk_line_mark_bb(struct work_struct *work);
726void pblk_line_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
ef576494
JG		 727 void (*work)(struct work_struct *),
728 struct workqueue_struct *wq);
a4bd217b
JG		 729u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line);
730int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line);
dd2a4343
JG		 731int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line,
732 void *emeta_buf);
a4bd217b
JG		 733int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa);
734void pblk_line_put(struct kref *ref);
735struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line);
dd2a4343
JG		 736u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line);
737void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
a4bd217b 738u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
dd2a4343 739u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
a4bd217b
JG		 740int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail,
741 unsigned long secs_to_flush);
3eaa11e2 742void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas);
a4bd217b
JG		 743void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
744 unsigned long *lun_bitmap);
3eaa11e2 745void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas);
a4bd217b
JG		 746void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
747 unsigned long *lun_bitmap);
748void pblk_end_bio_sync(struct bio *bio);
749void pblk_end_io_sync(struct nvm_rq *rqd);
750int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
751 int nr_pages);
a4bd217b
JG		 752void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off,
753 int nr_pages);
754void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa);
0880a9aa
JG		 755void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
756 u64 paddr);
a4bd217b
JG		 757void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa);
758void pblk_update_map_cache(struct pblk *pblk, sector_t lba,
759 struct ppa_addr ppa);
760void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
761 struct ppa_addr ppa, struct ppa_addr entry_line);
762int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
763 struct pblk_line *gc_line);
764void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
765 u64 *lba_list, int nr_secs);
766void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
767 sector_t blba, int nr_secs);
768
769/*
770 * pblk user I/O write path
771 */
772int pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
773 unsigned long flags);
774int pblk_write_gc_to_cache(struct pblk *pblk, void *data, u64 *lba_list,
775 unsigned int nr_entries, unsigned int nr_rec_entries,
776 struct pblk_line *gc_line, unsigned long flags);
777
778/*
779 * pblk map
780 */
781void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
782 unsigned int sentry, unsigned long *lun_bitmap,
783 unsigned int valid_secs, struct ppa_addr *erase_ppa);
784void pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
785 unsigned long *lun_bitmap, unsigned int valid_secs,
786 unsigned int off);
787
788/*
789 * pblk write thread
790 */
791int pblk_write_ts(void *data);
792void pblk_write_timer_fn(unsigned long data);
793void pblk_write_should_kick(struct pblk *pblk);
794
795/*
796 * pblk read path
797 */
b25d5237 798extern struct bio_set *pblk_bio_set;
a4bd217b
JG		 799int pblk_submit_read(struct pblk *pblk, struct bio *bio);
800int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
801 unsigned int nr_secs, unsigned int *secs_to_gc,
802 struct pblk_line *line);
803/*
804 * pblk recovery
805 */
806void pblk_submit_rec(struct work_struct *work);
807struct pblk_line *pblk_recov_l2p(struct pblk *pblk);
588726d3 808int pblk_recov_pad(struct pblk *pblk);
a4bd217b
JG		 809__le64 *pblk_recov_get_lba_list(struct pblk *pblk, struct line_emeta *emeta);
810int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx,
811 struct pblk_rec_ctx *recovery, u64 *comp_bits,
812 unsigned int comp);
813
814/*
815 * pblk gc
816 */
b20ba1bc 817#define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */
de54e703 818#define PBLK_GC_W_QD 128 /* Queue depth for inflight GC write I/Os */
b20ba1bc
JG		 819#define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */
820#define PBLK_GC_RSV_LINE 1 /* Reserved lines for GC */
a4bd217b
JG		 821
822int pblk_gc_init(struct pblk *pblk);
823void pblk_gc_exit(struct pblk *pblk);
824void pblk_gc_should_start(struct pblk *pblk);
825void pblk_gc_should_stop(struct pblk *pblk);
b20ba1bc
JG		 826void pblk_gc_should_kick(struct pblk *pblk);
827void pblk_gc_kick(struct pblk *pblk);
a4bd217b
JG		 828void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled,
829 int *gc_active);
b20ba1bc 830int pblk_gc_sysfs_force(struct pblk *pblk, int force);
a4bd217b
JG		 831
832/*
833 * pblk rate limiter
834 */
835void pblk_rl_init(struct pblk_rl *rl, int budget);
836void pblk_rl_free(struct pblk_rl *rl);
b20ba1bc
JG		 837int pblk_rl_high_thrs(struct pblk_rl *rl);
838int pblk_rl_low_thrs(struct pblk_rl *rl);
a4bd217b
JG		 839unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl);
840int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries);
588726d3 841void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries);
a4bd217b
JG		 842void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries);
843int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries);
844void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries);
845void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc);
a4bd217b
JG		 846int pblk_rl_sysfs_rate_show(struct pblk_rl *rl);
847void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line);
848void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line);
588726d3
JG		 849void pblk_rl_set_space_limit(struct pblk_rl *rl, int entries_left);
850int pblk_rl_is_limit(struct pblk_rl *rl);
a4bd217b
JG		 851
852/*
853 * pblk sysfs
854 */
855int pblk_sysfs_init(struct gendisk *tdisk);
856void pblk_sysfs_exit(struct gendisk *tdisk);
857
858static inline void *pblk_malloc(size_t size, int type, gfp_t flags)
859{
860 if (type == PBLK_KMALLOC_META)
861 return kmalloc(size, flags);
862 return vmalloc(size);
863}
864
865static inline void pblk_mfree(void *ptr, int type)
866{
867 if (type == PBLK_KMALLOC_META)
868 kfree(ptr);
869 else
870 vfree(ptr);
871}
872
873static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx)
874{
875 return c_ctx - sizeof(struct nvm_rq);
876}
877
dd2a4343
JG		 878static inline void *emeta_to_bb(struct line_emeta *emeta)
879{
880 return emeta->bb_bitmap;
881}
882
883static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta)
884{
885 return ((void *)emeta + pblk->lm.emeta_len[1]);
886}
887
888static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta)
a4bd217b 889{
dd2a4343 890 return (emeta_to_lbas(pblk, emeta) + pblk->lm.emeta_len[2]);
a4bd217b
JG		 891}
892
b20ba1bc
JG		 893static inline int pblk_line_vsc(struct pblk_line *line)
894{
895 int vsc;
896
897 spin_lock(&line->lock);
898 vsc = le32_to_cpu(*line->vsc);
899 spin_unlock(&line->lock);
900
901 return vsc;
902}
903
a4bd217b
JG		 904#define NVM_MEM_PAGE_WRITE (8)
905
906static inline int pblk_pad_distance(struct pblk *pblk)
907{
908 struct nvm_tgt_dev *dev = pblk->dev;
909 struct nvm_geo *geo = &dev->geo;
910
911 return NVM_MEM_PAGE_WRITE * geo->nr_luns * geo->sec_per_pl;
912}
913
914static inline int pblk_dev_ppa_to_line(struct ppa_addr p)
915{
916 return p.g.blk;
917}
918
919static inline int pblk_tgt_ppa_to_line(struct ppa_addr p)
920{
921 return p.g.blk;
922}
923
924static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
925{
926 return p.g.lun * geo->nr_chnls + p.g.ch;
927}
928
929/* A block within a line corresponds to the lun */
930static inline int pblk_dev_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
931{
932 return p.g.lun * geo->nr_chnls + p.g.ch;
933}
934
935static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
936{
937 struct ppa_addr ppa64;
938
939 ppa64.ppa = 0;
940
941 if (ppa32 == -1) {
942 ppa64.ppa = ADDR_EMPTY;
943 } else if (ppa32 & (1U << 31)) {
944 ppa64.c.line = ppa32 & ((~0U) >> 1);
945 ppa64.c.is_cached = 1;
946 } else {
947 ppa64.g.blk = (ppa32 & pblk->ppaf.blk_mask) >>
948 pblk->ppaf.blk_offset;
949 ppa64.g.pg = (ppa32 & pblk->ppaf.pg_mask) >>
950 pblk->ppaf.pg_offset;
951 ppa64.g.lun = (ppa32 & pblk->ppaf.lun_mask) >>
952 pblk->ppaf.lun_offset;
953 ppa64.g.ch = (ppa32 & pblk->ppaf.ch_mask) >>
954 pblk->ppaf.ch_offset;
955 ppa64.g.pl = (ppa32 & pblk->ppaf.pln_mask) >>
956 pblk->ppaf.pln_offset;
957 ppa64.g.sec = (ppa32 & pblk->ppaf.sec_mask) >>
958 pblk->ppaf.sec_offset;
959 }
960
961 return ppa64;
962}
963
964static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk,
965 sector_t lba)
966{
967 struct ppa_addr ppa;
968
969 if (pblk->ppaf_bitsize < 32) {
970 u32 *map = (u32 *)pblk->trans_map;
971
972 ppa = pblk_ppa32_to_ppa64(pblk, map[lba]);
973 } else {
974 struct ppa_addr *map = (struct ppa_addr *)pblk->trans_map;
975
976 ppa = map[lba];
977 }
978
979 return ppa;
980}
981
982static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
983{
984 u32 ppa32 = 0;
985
986 if (ppa64.ppa == ADDR_EMPTY) {
987 ppa32 = ~0U;
988 } else if (ppa64.c.is_cached) {
989 ppa32 |= ppa64.c.line;
990 ppa32 |= 1U << 31;
991 } else {
992 ppa32 |= ppa64.g.blk << pblk->ppaf.blk_offset;
993 ppa32 |= ppa64.g.pg << pblk->ppaf.pg_offset;
994 ppa32 |= ppa64.g.lun << pblk->ppaf.lun_offset;
995 ppa32 |= ppa64.g.ch << pblk->ppaf.ch_offset;
996 ppa32 |= ppa64.g.pl << pblk->ppaf.pln_offset;
997 ppa32 |= ppa64.g.sec << pblk->ppaf.sec_offset;
998 }
999
1000 return ppa32;
1001}
1002
1003static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba,
1004 struct ppa_addr ppa)
1005{
1006 if (pblk->ppaf_bitsize < 32) {
1007 u32 *map = (u32 *)pblk->trans_map;
1008
1009 map[lba] = pblk_ppa64_to_ppa32(pblk, ppa);
1010 } else {
1011 u64 *map = (u64 *)pblk->trans_map;
1012
1013 map[lba] = ppa.ppa;
1014 }
1015}
1016
1017static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
1018 struct ppa_addr p)
1019{
1020 u64 paddr;
1021
1022 paddr = 0;
1023 paddr |= (u64)p.g.pg << pblk->ppaf.pg_offset;
1024 paddr |= (u64)p.g.lun << pblk->ppaf.lun_offset;
1025 paddr |= (u64)p.g.ch << pblk->ppaf.ch_offset;
1026 paddr |= (u64)p.g.pl << pblk->ppaf.pln_offset;
1027 paddr |= (u64)p.g.sec << pblk->ppaf.sec_offset;
1028
1029 return paddr;
1030}
1031
1032static inline int pblk_ppa_empty(struct ppa_addr ppa_addr)
1033{
1034 return (ppa_addr.ppa == ADDR_EMPTY);
1035}
1036
1037static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr)
1038{
1039 ppa_addr->ppa = ADDR_EMPTY;
1040}
1041
07698466
JG		 1042static inline bool pblk_ppa_comp(struct ppa_addr lppa, struct ppa_addr rppa)
1043{
1044 if (lppa.ppa == rppa.ppa)
1045 return true;
1046
1047 return false;
1048}
1049
a4bd217b
JG		 1050static inline int pblk_addr_in_cache(struct ppa_addr ppa)
1051{
1052 return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached);
1053}
1054
1055static inline int pblk_addr_to_cacheline(struct ppa_addr ppa)
1056{
1057 return ppa.c.line;
1058}
1059
1060static inline struct ppa_addr pblk_cacheline_to_addr(int addr)
1061{
1062 struct ppa_addr p;
1063
1064 p.c.line = addr;
1065 p.c.is_cached = 1;
1066
1067 return p;
1068}
1069
1070static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
1071 u64 line_id)
1072{
1073 struct ppa_addr ppa;
1074
1075 ppa.ppa = 0;
1076 ppa.g.blk = line_id;
1077 ppa.g.pg = (paddr & pblk->ppaf.pg_mask) >> pblk->ppaf.pg_offset;
1078 ppa.g.lun = (paddr & pblk->ppaf.lun_mask) >> pblk->ppaf.lun_offset;
1079 ppa.g.ch = (paddr & pblk->ppaf.ch_mask) >> pblk->ppaf.ch_offset;
1080 ppa.g.pl = (paddr & pblk->ppaf.pln_mask) >> pblk->ppaf.pln_offset;
1081 ppa.g.sec = (paddr & pblk->ppaf.sec_mask) >> pblk->ppaf.sec_offset;
1082
1083 return ppa;
1084}
1085
1086static inline struct ppa_addr addr_to_pblk_ppa(struct pblk *pblk, u64 paddr,
1087 u64 line_id)
1088{
1089 struct ppa_addr ppa;
1090
1091 ppa = addr_to_gen_ppa(pblk, paddr, line_id);
1092
1093 return ppa;
1094}
1095
1096static inline u32 pblk_calc_meta_header_crc(struct pblk *pblk,
dd2a4343 1097 struct line_header *header)
a4bd217b
JG		 1098{
1099 u32 crc = ~(u32)0;
1100
dd2a4343 1101 crc = crc32_le(crc, (unsigned char *)header + sizeof(crc),
a4bd217b
JG		 1102 sizeof(struct line_header) - sizeof(crc));
1103
1104 return crc;
1105}
1106
1107static inline u32 pblk_calc_smeta_crc(struct pblk *pblk,
1108 struct line_smeta *smeta)
1109{
1110 struct pblk_line_meta *lm = &pblk->lm;
1111 u32 crc = ~(u32)0;
1112
1113 crc = crc32_le(crc, (unsigned char *)smeta +
1114 sizeof(struct line_header) + sizeof(crc),
1115 lm->smeta_len -
1116 sizeof(struct line_header) - sizeof(crc));
1117
1118 return crc;
1119}
1120
1121static inline u32 pblk_calc_emeta_crc(struct pblk *pblk,
1122 struct line_emeta *emeta)
1123{
1124 struct pblk_line_meta *lm = &pblk->lm;
1125 u32 crc = ~(u32)0;
1126
1127 crc = crc32_le(crc, (unsigned char *)emeta +
1128 sizeof(struct line_header) + sizeof(crc),
dd2a4343 1129 lm->emeta_len[0] -
a4bd217b
JG		 1130 sizeof(struct line_header) - sizeof(crc));
1131
1132 return crc;
1133}
1134
1135static inline int pblk_set_progr_mode(struct pblk *pblk, int type)
1136{
1137 struct nvm_tgt_dev *dev = pblk->dev;
1138 struct nvm_geo *geo = &dev->geo;
1139 int flags;
1140
1141 flags = geo->plane_mode >> 1;
1142
1143 if (type == WRITE)
1144 flags |= NVM_IO_SCRAMBLE_ENABLE;
1145
1146 return flags;
1147}
1148
f9c10152
JG		 1149enum {
1150 PBLK_READ_RANDOM = 0,
1151 PBLK_READ_SEQUENTIAL = 1,
1152};
1153
1154static inline int pblk_set_read_mode(struct pblk *pblk, int type)
1155{
1156 struct nvm_tgt_dev *dev = pblk->dev;
1157 struct nvm_geo *geo = &dev->geo;
1158 int flags;
1159
1160 flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE;
1161 if (type == PBLK_READ_SEQUENTIAL)
1162 flags |= geo->plane_mode >> 1;
1163
1164 return flags;
1165}
1166
1167static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs)
a4bd217b 1168{
f9c10152 1169 return !(nr_secs % pblk->min_write_pgs);
a4bd217b
JG		 1170}
1171
1172#ifdef CONFIG_NVM_DEBUG
1173static inline void print_ppa(struct ppa_addr *p, char *msg, int error)
1174{
1175 if (p->c.is_cached) {
1176 pr_err("ppa: (%s: %x) cache line: %llu\n",
1177 msg, error, (u64)p->c.line);
1178 } else {
1179 pr_err("ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n",
1180 msg, error,
1181 p->g.ch, p->g.lun, p->g.blk,
1182 p->g.pg, p->g.pl, p->g.sec);
1183 }
1184}
1185
1186static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd,
1187 int error)
1188{
1189 int bit = -1;
1190
1191 if (rqd->nr_ppas == 1) {
1192 print_ppa(&rqd->ppa_addr, "rqd", error);
1193 return;
1194 }
1195
1196 while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas,
1197 bit + 1)) < rqd->nr_ppas) {
1198 print_ppa(&rqd->ppa_list[bit], "rqd", error);
1199 }
1200
1201 pr_err("error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
1202}
1203#endif
1204
1205static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
1206 struct ppa_addr *ppas, int nr_ppas)
1207{
1208 struct nvm_geo *geo = &tgt_dev->geo;
1209 struct ppa_addr *ppa;
1210 int i;
1211
1212 for (i = 0; i < nr_ppas; i++) {
1213 ppa = &ppas[i];
1214
1215 if (!ppa->c.is_cached &&
1216 ppa->g.ch < geo->nr_chnls &&
1217 ppa->g.lun < geo->luns_per_chnl &&
1218 ppa->g.pl < geo->nr_planes &&
1219 ppa->g.blk < geo->blks_per_lun &&
1220 ppa->g.pg < geo->pgs_per_blk &&
1221 ppa->g.sec < geo->sec_per_pg)
1222 continue;
1223
1224#ifdef CONFIG_NVM_DEBUG
1225 print_ppa(ppa, "boundary", i);
1226#endif
1227 return 1;
1228 }
1229 return 0;
1230}
1231
1232static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr)
1233{
1234 struct pblk_line_meta *lm = &pblk->lm;
1235
1236 if (paddr > lm->sec_per_line)
1237 return 1;
1238
1239 return 0;
1240}
1241
1242static inline unsigned int pblk_get_bi_idx(struct bio *bio)
1243{
1244 return bio->bi_iter.bi_idx;
1245}
1246
1247static inline sector_t pblk_get_lba(struct bio *bio)
1248{
1249 return bio->bi_iter.bi_sector / NR_PHY_IN_LOG;
1250}
1251
1252static inline unsigned int pblk_get_secs(struct bio *bio)
1253{
1254 return bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE;
1255}
1256
1257static inline sector_t pblk_get_sector(sector_t lba)
1258{
1259 return lba * NR_PHY_IN_LOG;
1260}
1261
1262static inline void pblk_setup_uuid(struct pblk *pblk)
1263{
1264 uuid_le uuid;
1265
1266 uuid_le_gen(&uuid);
1267 memcpy(pblk->instance_uuid, uuid.b, 16);
1268}
1269#endif /* PBLK_H_ */
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