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ipv6: change route cache aging logic
[linux/fpc-iii.git] / drivers / lightnvm / pblk.h
blob59a64d461a5dcf1e25c07000293fab0a7642a7ee
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_ */
Linux with added FPC-III support