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x86/topology: Fix function name in documentation
[cris-mirror.git] / drivers / lightnvm / pblk.h
blob8c357fb6538e3ec4081b3975e65be18151f08892
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 /* Static pool sizes */
55 #define PBLK_GEN_WS_POOL_SIZE (2)
56
57 #define PBLK_DEFAULT_OP (11)
58
59 enum {
60 PBLK_READ = READ,
61 PBLK_WRITE = WRITE,/* Write from write buffer */
62 PBLK_WRITE_INT, /* Internal write - no write buffer */
63 PBLK_READ_RECOV, /* Recovery read - errors allowed */
64 PBLK_ERASE,
65 };
66
67 enum {
68 /* IO Types */
69 PBLK_IOTYPE_USER = 1 << 0,
70 PBLK_IOTYPE_GC = 1 << 1,
71
72 /* Write buffer flags */
73 PBLK_FLUSH_ENTRY = 1 << 2,
74 PBLK_WRITTEN_DATA = 1 << 3,
75 PBLK_SUBMITTED_ENTRY = 1 << 4,
76 PBLK_WRITABLE_ENTRY = 1 << 5,
77 };
78
79 enum {
80 PBLK_BLK_ST_OPEN = 0x1,
81 PBLK_BLK_ST_CLOSED = 0x2,
82 };
83
84 struct pblk_sec_meta {
85 u64 reserved;
86 __le64 lba;
87 };
88
89 /* The number of GC lists and the rate-limiter states go together. This way the
90 * rate-limiter can dictate how much GC is needed based on resource utilization.
91 */
92 #define PBLK_GC_NR_LISTS 3
93
94 enum {
95 PBLK_RL_HIGH = 1,
96 PBLK_RL_MID = 2,
97 PBLK_RL_LOW = 3,
98 };
99
100 #define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS)
101 #define pblk_dma_ppa_size (sizeof(u64) * PBLK_MAX_REQ_ADDRS)
102
103 /* write buffer completion context */
104 struct pblk_c_ctx {
105 struct list_head list; /* Head for out-of-order completion */
106
107 unsigned long *lun_bitmap; /* Luns used on current request */
108 unsigned int sentry;
109 unsigned int nr_valid;
110 unsigned int nr_padded;
111 };
112
113 /* read context */
114 struct pblk_g_ctx {
115 void *private;
116 unsigned long start_time;
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 flush_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_flush_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 high_pw; /* High rounded up as a power of 2 */
260
261 #define PBLK_USER_HIGH_THRS 8 /* Begin write limit at 12% available blks */
262 #define PBLK_USER_LOW_THRS 10 /* Aggressive GC at 10% available blocks */
263
264 int rb_windows_pw; /* Number of rate windows in the write buffer
265 * given as a power-of-2. This guarantees that
266 * when user I/O is being rate limited, there
267 * will be reserved enough space for the GC to
268 * place its payload. A window is of
269 * pblk->max_write_pgs size, which in NVMe is
270 * 64, i.e., 256kb.
271 */
272 int rb_budget; /* Total number of entries available for I/O */
273 int rb_user_max; /* Max buffer entries available for user I/O */
274 int rb_gc_max; /* Max buffer entries available for GC I/O */
275 int rb_gc_rsv; /* Reserved buffer entries for GC I/O */
276 int rb_state; /* Rate-limiter current state */
277 int rb_max_io; /* Maximum size for an I/O giving the config */
278
279 atomic_t rb_user_cnt; /* User I/O buffer counter */
280 atomic_t rb_gc_cnt; /* GC I/O buffer counter */
281 atomic_t rb_space; /* Space limit in case of reaching capacity */
282
283 int rsv_blocks; /* Reserved blocks for GC */
284
285 int rb_user_active;
286 int rb_gc_active;
287
288 struct timer_list u_timer;
289
290 unsigned long long nr_secs;
291 unsigned long total_blocks;
292
293 atomic_t free_blocks; /* Total number of free blocks (+ OP) */
294 atomic_t free_user_blocks; /* Number of user free blocks (no OP) */
295 };
296
297 #define PBLK_LINE_EMPTY (~0U)
298
299 enum {
300 /* Line Types */
301 PBLK_LINETYPE_FREE = 0,
302 PBLK_LINETYPE_LOG = 1,
303 PBLK_LINETYPE_DATA = 2,
304
305 /* Line state */
306 PBLK_LINESTATE_FREE = 10,
307 PBLK_LINESTATE_OPEN = 11,
308 PBLK_LINESTATE_CLOSED = 12,
309 PBLK_LINESTATE_GC = 13,
310 PBLK_LINESTATE_BAD = 14,
311 PBLK_LINESTATE_CORRUPT = 15,
312
313 /* GC group */
314 PBLK_LINEGC_NONE = 20,
315 PBLK_LINEGC_EMPTY = 21,
316 PBLK_LINEGC_LOW = 22,
317 PBLK_LINEGC_MID = 23,
318 PBLK_LINEGC_HIGH = 24,
319 PBLK_LINEGC_FULL = 25,
320 };
321
322 #define PBLK_MAGIC 0x70626c6b /*pblk*/
323 #define SMETA_VERSION cpu_to_le16(1)
324
325 struct line_header {
326 __le32 crc;
327 __le32 identifier; /* pblk identifier */
328 __u8 uuid[16]; /* instance uuid */
329 __le16 type; /* line type */
330 __le16 version; /* type version */
331 __le32 id; /* line id for current line */
332 };
333
334 struct line_smeta {
335 struct line_header header;
336
337 __le32 crc; /* Full structure including struct crc */
338 /* Previous line metadata */
339 __le32 prev_id; /* Line id for previous line */
340
341 /* Current line metadata */
342 __le64 seq_nr; /* Sequence number for current line */
343
344 /* Active writers */
345 __le32 window_wr_lun; /* Number of parallel LUNs to write */
346
347 __le32 rsvd[2];
348
349 __le64 lun_bitmap[];
350 };
351
352 /*
353 * Metadata layout in media:
354 * First sector:
355 * 1. struct line_emeta
356 * 2. bad block bitmap (u64 * window_wr_lun)
357 * Mid sectors (start at lbas_sector):
358 * 3. nr_lbas (u64) forming lba list
359 * Last sectors (start at vsc_sector):
360 * 4. u32 valid sector count (vsc) for all lines (~0U: free line)
361 */
362 struct line_emeta {
363 struct line_header header;
364
365 __le32 crc; /* Full structure including struct crc */
366
367 /* Previous line metadata */
368 __le32 prev_id; /* Line id for prev line */
369
370 /* Current line metadata */
371 __le64 seq_nr; /* Sequence number for current line */
372
373 /* Active writers */
374 __le32 window_wr_lun; /* Number of parallel LUNs to write */
375
376 /* Bookkeeping for recovery */
377 __le32 next_id; /* Line id for next line */
378 __le64 nr_lbas; /* Number of lbas mapped in line */
379 __le64 nr_valid_lbas; /* Number of valid lbas mapped in line */
380 __le64 bb_bitmap[]; /* Updated bad block bitmap for line */
381 };
382
383 struct pblk_emeta {
384 struct line_emeta *buf; /* emeta buffer in media format */
385 int mem; /* Write offset - points to next
386 * writable entry in memory
387 */
388 atomic_t sync; /* Synced - backpointer that signals the
389 * last entry that has been successfully
390 * persisted to media
391 */
392 unsigned int nr_entries; /* Number of emeta entries */
393 };
394
395 struct pblk_smeta {
396 struct line_smeta *buf; /* smeta buffer in persistent format */
397 };
398
399 struct pblk_line {
400 struct pblk *pblk;
401 unsigned int id; /* Line number corresponds to the
402 * block line
403 */
404 unsigned int seq_nr; /* Unique line sequence number */
405
406 int state; /* PBLK_LINESTATE_X */
407 int type; /* PBLK_LINETYPE_X */
408 int gc_group; /* PBLK_LINEGC_X */
409 struct list_head list; /* Free, GC lists */
410
411 unsigned long *lun_bitmap; /* Bitmap for LUNs mapped in line */
412
413 struct pblk_smeta *smeta; /* Start metadata */
414 struct pblk_emeta *emeta; /* End medatada */
415
416 int meta_line; /* Metadata line id */
417 int meta_distance; /* Distance between data and metadata */
418
419 u64 smeta_ssec; /* Sector where smeta starts */
420 u64 emeta_ssec; /* Sector where emeta starts */
421
422 unsigned int sec_in_line; /* Number of usable secs in line */
423
424 atomic_t blk_in_line; /* Number of good blocks in line */
425 unsigned long *blk_bitmap; /* Bitmap for valid/invalid blocks */
426 unsigned long *erase_bitmap; /* Bitmap for erased blocks */
427
428 unsigned long *map_bitmap; /* Bitmap for mapped sectors in line */
429 unsigned long *invalid_bitmap; /* Bitmap for invalid sectors in line */
430
431 atomic_t left_eblks; /* Blocks left for erasing */
432 atomic_t left_seblks; /* Blocks left for sync erasing */
433
434 int left_msecs; /* Sectors left for mapping */
435 unsigned int cur_sec; /* Sector map pointer */
436 unsigned int nr_valid_lbas; /* Number of valid lbas in line */
437
438 __le32 *vsc; /* Valid sector count in line */
439
440 struct kref ref; /* Write buffer L2P references */
441
442 spinlock_t lock; /* Necessary for invalid_bitmap only */
443 };
444
445 #define PBLK_DATA_LINES 4
446
447 enum {
448 PBLK_KMALLOC_META = 1,
449 PBLK_VMALLOC_META = 2,
450 };
451
452 enum {
453 PBLK_EMETA_TYPE_HEADER = 1, /* struct line_emeta first sector */
454 PBLK_EMETA_TYPE_LLBA = 2, /* lba list - type: __le64 */
455 PBLK_EMETA_TYPE_VSC = 3, /* vsc list - type: __le32 */
456 };
457
458 struct pblk_line_mgmt {
459 int nr_lines; /* Total number of full lines */
460 int nr_free_lines; /* Number of full lines in free list */
461
462 /* Free lists - use free_lock */
463 struct list_head free_list; /* Full lines ready to use */
464 struct list_head corrupt_list; /* Full lines corrupted */
465 struct list_head bad_list; /* Full lines bad */
466
467 /* GC lists - use gc_lock */
468 struct list_head *gc_lists[PBLK_GC_NR_LISTS];
469 struct list_head gc_high_list; /* Full lines ready to GC, high isc */
470 struct list_head gc_mid_list; /* Full lines ready to GC, mid isc */
471 struct list_head gc_low_list; /* Full lines ready to GC, low isc */
472
473 struct list_head gc_full_list; /* Full lines ready to GC, no valid */
474 struct list_head gc_empty_list; /* Full lines close, all valid */
475
476 struct pblk_line *log_line; /* Current FTL log line */
477 struct pblk_line *data_line; /* Current data line */
478 struct pblk_line *log_next; /* Next FTL log line */
479 struct pblk_line *data_next; /* Next data line */
480
481 struct list_head emeta_list; /* Lines queued to schedule emeta */
482
483 __le32 *vsc_list; /* Valid sector counts for all lines */
484
485 /* Metadata allocation type: VMALLOC | KMALLOC */
486 int emeta_alloc_type;
487
488 /* Pre-allocated metadata for data lines */
489 struct pblk_smeta *sline_meta[PBLK_DATA_LINES];
490 struct pblk_emeta *eline_meta[PBLK_DATA_LINES];
491 unsigned long meta_bitmap;
492
493 /* Helpers for fast bitmap calculations */
494 unsigned long *bb_template;
495 unsigned long *bb_aux;
496
497 unsigned long d_seq_nr; /* Data line unique sequence number */
498 unsigned long l_seq_nr; /* Log line unique sequence number */
499
500 spinlock_t free_lock;
501 spinlock_t close_lock;
502 spinlock_t gc_lock;
503 };
504
505 struct pblk_line_meta {
506 unsigned int smeta_len; /* Total length for smeta */
507 unsigned int smeta_sec; /* Sectors needed for smeta */
508
509 unsigned int emeta_len[4]; /* Lengths for emeta:
510 * [0]: Total length
511 * [1]: struct line_emeta length
512 * [2]: L2P portion length
513 * [3]: vsc list length
514 */
515 unsigned int emeta_sec[4]; /* Sectors needed for emeta. Same layout
516 * as emeta_len
517 */
518
519 unsigned int emeta_bb; /* Boundary for bb that affects emeta */
520
521 unsigned int vsc_list_len; /* Length for vsc list */
522 unsigned int sec_bitmap_len; /* Length for sector bitmap in line */
523 unsigned int blk_bitmap_len; /* Length for block bitmap in line */
524 unsigned int lun_bitmap_len; /* Length for lun bitmap in line */
525
526 unsigned int blk_per_line; /* Number of blocks in a full line */
527 unsigned int sec_per_line; /* Number of sectors in a line */
528 unsigned int dsec_per_line; /* Number of data sectors in a line */
529 unsigned int min_blk_line; /* Min. number of good blocks in line */
530
531 unsigned int mid_thrs; /* Threshold for GC mid list */
532 unsigned int high_thrs; /* Threshold for GC high list */
533
534 unsigned int meta_distance; /* Distance between data and metadata */
535 };
536
537 struct pblk_addr_format {
538 u64 ch_mask;
539 u64 lun_mask;
540 u64 pln_mask;
541 u64 blk_mask;
542 u64 pg_mask;
543 u64 sec_mask;
544 u8 ch_offset;
545 u8 lun_offset;
546 u8 pln_offset;
547 u8 blk_offset;
548 u8 pg_offset;
549 u8 sec_offset;
550 };
551
552 enum {
553 PBLK_STATE_RUNNING = 0,
554 PBLK_STATE_STOPPING = 1,
555 PBLK_STATE_RECOVERING = 2,
556 PBLK_STATE_STOPPED = 3,
557 };
558
559 struct pblk {
560 struct nvm_tgt_dev *dev;
561 struct gendisk *disk;
562
563 struct kobject kobj;
564
565 struct pblk_lun *luns;
566
567 struct pblk_line *lines; /* Line array */
568 struct pblk_line_mgmt l_mg; /* Line management */
569 struct pblk_line_meta lm; /* Line metadata */
570
571 int ppaf_bitsize;
572 struct pblk_addr_format ppaf;
573
574 struct pblk_rb rwb;
575
576 int state; /* pblk line state */
577
578 int min_write_pgs; /* Minimum amount of pages required by controller */
579 int max_write_pgs; /* Maximum amount of pages supported by controller */
580 int pgs_in_buffer; /* Number of pages that need to be held in buffer to
581 * guarantee successful reads.
582 */
583
584 sector_t capacity; /* Device capacity when bad blocks are subtracted */
585
586 int op; /* Percentage of device used for over-provisioning */
587 int op_blks; /* Number of blocks used for over-provisioning */
588
589 /* pblk provisioning values. Used by rate limiter */
590 struct pblk_rl rl;
591
592 int sec_per_write;
593
594 unsigned char instance_uuid[16];
595 #ifdef CONFIG_NVM_DEBUG
596 /* All debug counters apply to 4kb sector I/Os */
597 atomic_long_t inflight_writes; /* Inflight writes (user and gc) */
598 atomic_long_t padded_writes; /* Sectors padded due to flush/fua */
599 atomic_long_t padded_wb; /* Sectors padded in write buffer */
600 atomic_long_t nr_flush; /* Number of flush/fua I/O */
601 atomic_long_t req_writes; /* Sectors stored on write buffer */
602 atomic_long_t sub_writes; /* Sectors submitted from buffer */
603 atomic_long_t sync_writes; /* Sectors synced to media */
604 atomic_long_t inflight_reads; /* Inflight sector read requests */
605 atomic_long_t cache_reads; /* Read requests that hit the cache */
606 atomic_long_t sync_reads; /* Completed sector read requests */
607 atomic_long_t recov_writes; /* Sectors submitted from recovery */
608 atomic_long_t recov_gc_writes; /* Sectors submitted from write GC */
609 atomic_long_t recov_gc_reads; /* Sectors submitted from read GC */
610 #endif
611
612 spinlock_t lock;
613
614 atomic_long_t read_failed;
615 atomic_long_t read_empty;
616 atomic_long_t read_high_ecc;
617 atomic_long_t read_failed_gc;
618 atomic_long_t write_failed;
619 atomic_long_t erase_failed;
620
621 atomic_t inflight_io; /* General inflight I/O counter */
622
623 struct task_struct *writer_ts;
624
625 /* Simple translation map of logical addresses to physical addresses.
626 * The logical addresses is known by the host system, while the physical
627 * addresses are used when writing to the disk block device.
628 */
629 unsigned char *trans_map;
630 spinlock_t trans_lock;
631
632 struct list_head compl_list;
633
634 mempool_t *page_bio_pool;
635 mempool_t *gen_ws_pool;
636 mempool_t *rec_pool;
637 mempool_t *r_rq_pool;
638 mempool_t *w_rq_pool;
639 mempool_t *e_rq_pool;
640
641 struct workqueue_struct *close_wq;
642 struct workqueue_struct *bb_wq;
643 struct workqueue_struct *r_end_wq;
644
645 struct timer_list wtimer;
646
647 struct pblk_gc gc;
648 };
649
650 struct pblk_line_ws {
651 struct pblk *pblk;
652 struct pblk_line *line;
653 void *priv;
654 struct work_struct ws;
655 };
656
657 #define pblk_g_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_g_ctx))
658 #define pblk_w_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_c_ctx))
659
660 /*
661 * pblk ring buffer operations
662 */
663 int pblk_rb_init(struct pblk_rb *rb, struct pblk_rb_entry *rb_entry_base,
664 unsigned int power_size, unsigned int power_seg_sz);
665 unsigned int pblk_rb_calculate_size(unsigned int nr_entries);
666 void *pblk_rb_entries_ref(struct pblk_rb *rb);
667 int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio,
668 unsigned int nr_entries, unsigned int *pos);
669 int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries,
670 unsigned int *pos);
671 void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data,
672 struct pblk_w_ctx w_ctx, unsigned int pos);
673 void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data,
674 struct pblk_w_ctx w_ctx, struct pblk_line *line,
675 u64 paddr, unsigned int pos);
676 struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos);
677 void pblk_rb_flush(struct pblk_rb *rb);
678
679 void pblk_rb_sync_l2p(struct pblk_rb *rb);
680 unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd,
681 unsigned int pos, unsigned int nr_entries,
682 unsigned int count);
683 unsigned int pblk_rb_read_to_bio_list(struct pblk_rb *rb, struct bio *bio,
684 struct list_head *list,
685 unsigned int max);
686 int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba,
687 struct ppa_addr ppa, int bio_iter, bool advanced_bio);
688 unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries);
689
690 unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags);
691 unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries);
692 struct pblk_rb_entry *pblk_rb_sync_scan_entry(struct pblk_rb *rb,
693 struct ppa_addr *ppa);
694 void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags);
695 unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb);
696
697 unsigned int pblk_rb_read_count(struct pblk_rb *rb);
698 unsigned int pblk_rb_sync_count(struct pblk_rb *rb);
699 unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos);
700
701 int pblk_rb_tear_down_check(struct pblk_rb *rb);
702 int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos);
703 void pblk_rb_data_free(struct pblk_rb *rb);
704 ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf);
705
706 /*
707 * pblk core
708 */
709 struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type);
710 void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type);
711 void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write);
712 int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd,
713 struct pblk_c_ctx *c_ctx);
714 void pblk_discard(struct pblk *pblk, struct bio *bio);
715 void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd);
716 void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd);
717 int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd);
718 int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd);
719 int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
720 struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
721 unsigned int nr_secs, unsigned int len,
722 int alloc_type, gfp_t gfp_mask);
723 struct pblk_line *pblk_line_get(struct pblk *pblk);
724 struct pblk_line *pblk_line_get_first_data(struct pblk *pblk);
725 struct pblk_line *pblk_line_replace_data(struct pblk *pblk);
726 int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line);
727 void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line);
728 struct pblk_line *pblk_line_get_data(struct pblk *pblk);
729 struct pblk_line *pblk_line_get_erase(struct pblk *pblk);
730 int pblk_line_erase(struct pblk *pblk, struct pblk_line *line);
731 int pblk_line_is_full(struct pblk_line *line);
732 void pblk_line_free(struct pblk *pblk, struct pblk_line *line);
733 void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line);
734 void pblk_line_close(struct pblk *pblk, struct pblk_line *line);
735 void pblk_line_close_ws(struct work_struct *work);
736 void pblk_pipeline_stop(struct pblk *pblk);
737 void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
738 void (*work)(struct work_struct *), gfp_t gfp_mask,
739 struct workqueue_struct *wq);
740 u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line);
741 int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line);
742 int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line,
743 void *emeta_buf);
744 int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa);
745 void pblk_line_put(struct kref *ref);
746 void pblk_line_put_wq(struct kref *ref);
747 struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line);
748 u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line);
749 void pblk_dealloc_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 u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
752 int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail,
753 unsigned long secs_to_flush);
754 void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas);
755 void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
756 unsigned long *lun_bitmap);
757 void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas);
758 void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
759 unsigned long *lun_bitmap);
760 void pblk_end_io_sync(struct nvm_rq *rqd);
761 int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
762 int nr_pages);
763 void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off,
764 int nr_pages);
765 void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa);
766 void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
767 u64 paddr);
768 void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa);
769 void pblk_update_map_cache(struct pblk *pblk, sector_t lba,
770 struct ppa_addr ppa);
771 void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
772 struct ppa_addr ppa, struct ppa_addr entry_line);
773 int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
774 struct pblk_line *gc_line, u64 paddr);
775 void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
776 u64 *lba_list, int nr_secs);
777 void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
778 sector_t blba, int nr_secs);
779
780 /*
781 * pblk user I/O write path
782 */
783 int pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
784 unsigned long flags);
785 int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
786
787 /*
788 * pblk map
789 */
790 void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
791 unsigned int sentry, unsigned long *lun_bitmap,
792 unsigned int valid_secs, struct ppa_addr *erase_ppa);
793 void pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
794 unsigned long *lun_bitmap, unsigned int valid_secs,
795 unsigned int off);
796
797 /*
798 * pblk write thread
799 */
800 int pblk_write_ts(void *data);
801 void pblk_write_timer_fn(struct timer_list *t);
802 void pblk_write_should_kick(struct pblk *pblk);
803
804 /*
805 * pblk read path
806 */
807 extern struct bio_set *pblk_bio_set;
808 int pblk_submit_read(struct pblk *pblk, struct bio *bio);
809 int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
810 /*
811 * pblk recovery
812 */
813 void pblk_submit_rec(struct work_struct *work);
814 struct pblk_line *pblk_recov_l2p(struct pblk *pblk);
815 int pblk_recov_pad(struct pblk *pblk);
816 int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta);
817 int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx,
818 struct pblk_rec_ctx *recovery, u64 *comp_bits,
819 unsigned int comp);
820
821 /*
822 * pblk gc
823 */
824 #define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */
825 #define PBLK_GC_RQ_QD 128 /* Queue depth for inflight GC requests */
826 #define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */
827 #define PBLK_GC_RSV_LINE 1 /* Reserved lines for GC */
828
829 int pblk_gc_init(struct pblk *pblk);
830 void pblk_gc_exit(struct pblk *pblk);
831 void pblk_gc_should_start(struct pblk *pblk);
832 void pblk_gc_should_stop(struct pblk *pblk);
833 void pblk_gc_should_kick(struct pblk *pblk);
834 void pblk_gc_free_full_lines(struct pblk *pblk);
835 void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled,
836 int *gc_active);
837 int pblk_gc_sysfs_force(struct pblk *pblk, int force);
838
839 /*
840 * pblk rate limiter
841 */
842 void pblk_rl_init(struct pblk_rl *rl, int budget);
843 void pblk_rl_free(struct pblk_rl *rl);
844 void pblk_rl_update_rates(struct pblk_rl *rl);
845 int pblk_rl_high_thrs(struct pblk_rl *rl);
846 unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl);
847 unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl);
848 int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries);
849 void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries);
850 void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries);
851 int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries);
852 void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries);
853 void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc);
854 int pblk_rl_max_io(struct pblk_rl *rl);
855 void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line);
856 void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line,
857 bool used);
858 int pblk_rl_is_limit(struct pblk_rl *rl);
859
860 /*
861 * pblk sysfs
862 */
863 int pblk_sysfs_init(struct gendisk *tdisk);
864 void pblk_sysfs_exit(struct gendisk *tdisk);
865
866 static inline void *pblk_malloc(size_t size, int type, gfp_t flags)
867 {
868 if (type == PBLK_KMALLOC_META)
869 return kmalloc(size, flags);
870 return vmalloc(size);
871 }
872
873 static inline void pblk_mfree(void *ptr, int type)
874 {
875 if (type == PBLK_KMALLOC_META)
876 kfree(ptr);
877 else
878 vfree(ptr);
879 }
880
881 static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx)
882 {
883 return c_ctx - sizeof(struct nvm_rq);
884 }
885
886 static inline void *emeta_to_bb(struct line_emeta *emeta)
887 {
888 return emeta->bb_bitmap;
889 }
890
891 static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta)
892 {
893 return ((void *)emeta + pblk->lm.emeta_len[1]);
894 }
895
896 static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta)
897 {
898 return (emeta_to_lbas(pblk, emeta) + pblk->lm.emeta_len[2]);
899 }
900
901 static inline int pblk_line_vsc(struct pblk_line *line)
902 {
903 return le32_to_cpu(*line->vsc);
904 }
905
906 #define NVM_MEM_PAGE_WRITE (8)
907
908 static inline int pblk_pad_distance(struct pblk *pblk)
909 {
910 struct nvm_tgt_dev *dev = pblk->dev;
911 struct nvm_geo *geo = &dev->geo;
912
913 return NVM_MEM_PAGE_WRITE * geo->all_luns * geo->sec_per_pl;
914 }
915
916 static inline int pblk_ppa_to_line(struct ppa_addr p)
917 {
918 return p.g.blk;
919 }
920
921 static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
922 {
923 return p.g.lun * geo->nr_chnls + p.g.ch;
924 }
925
926 static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
927 u64 line_id)
928 {
929 struct ppa_addr ppa;
930
931 ppa.ppa = 0;
932 ppa.g.blk = line_id;
933 ppa.g.pg = (paddr & pblk->ppaf.pg_mask) >> pblk->ppaf.pg_offset;
934 ppa.g.lun = (paddr & pblk->ppaf.lun_mask) >> pblk->ppaf.lun_offset;
935 ppa.g.ch = (paddr & pblk->ppaf.ch_mask) >> pblk->ppaf.ch_offset;
936 ppa.g.pl = (paddr & pblk->ppaf.pln_mask) >> pblk->ppaf.pln_offset;
937 ppa.g.sec = (paddr & pblk->ppaf.sec_mask) >> pblk->ppaf.sec_offset;
938
939 return ppa;
940 }
941
942 static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
943 struct ppa_addr p)
944 {
945 u64 paddr;
946
947 paddr = (u64)p.g.pg << pblk->ppaf.pg_offset;
948 paddr |= (u64)p.g.lun << pblk->ppaf.lun_offset;
949 paddr |= (u64)p.g.ch << pblk->ppaf.ch_offset;
950 paddr |= (u64)p.g.pl << pblk->ppaf.pln_offset;
951 paddr |= (u64)p.g.sec << pblk->ppaf.sec_offset;
952
953 return paddr;
954 }
955
956 static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
957 {
958 struct ppa_addr ppa64;
959
960 ppa64.ppa = 0;
961
962 if (ppa32 == -1) {
963 ppa64.ppa = ADDR_EMPTY;
964 } else if (ppa32 & (1U << 31)) {
965 ppa64.c.line = ppa32 & ((~0U) >> 1);
966 ppa64.c.is_cached = 1;
967 } else {
968 ppa64.g.blk = (ppa32 & pblk->ppaf.blk_mask) >>
969 pblk->ppaf.blk_offset;
970 ppa64.g.pg = (ppa32 & pblk->ppaf.pg_mask) >>
971 pblk->ppaf.pg_offset;
972 ppa64.g.lun = (ppa32 & pblk->ppaf.lun_mask) >>
973 pblk->ppaf.lun_offset;
974 ppa64.g.ch = (ppa32 & pblk->ppaf.ch_mask) >>
975 pblk->ppaf.ch_offset;
976 ppa64.g.pl = (ppa32 & pblk->ppaf.pln_mask) >>
977 pblk->ppaf.pln_offset;
978 ppa64.g.sec = (ppa32 & pblk->ppaf.sec_mask) >>
979 pblk->ppaf.sec_offset;
980 }
981
982 return ppa64;
983 }
984
985 static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
986 {
987 u32 ppa32 = 0;
988
989 if (ppa64.ppa == ADDR_EMPTY) {
990 ppa32 = ~0U;
991 } else if (ppa64.c.is_cached) {
992 ppa32 |= ppa64.c.line;
993 ppa32 |= 1U << 31;
994 } else {
995 ppa32 |= ppa64.g.blk << pblk->ppaf.blk_offset;
996 ppa32 |= ppa64.g.pg << pblk->ppaf.pg_offset;
997 ppa32 |= ppa64.g.lun << pblk->ppaf.lun_offset;
998 ppa32 |= ppa64.g.ch << pblk->ppaf.ch_offset;
999 ppa32 |= ppa64.g.pl << pblk->ppaf.pln_offset;
1000 ppa32 |= ppa64.g.sec << pblk->ppaf.sec_offset;
1001 }
1002
1003 return ppa32;
1004 }
1005
1006 static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk,
1007 sector_t lba)
1008 {
1009 struct ppa_addr ppa;
1010
1011 if (pblk->ppaf_bitsize < 32) {
1012 u32 *map = (u32 *)pblk->trans_map;
1013
1014 ppa = pblk_ppa32_to_ppa64(pblk, map[lba]);
1015 } else {
1016 struct ppa_addr *map = (struct ppa_addr *)pblk->trans_map;
1017
1018 ppa = map[lba];
1019 }
1020
1021 return ppa;
1022 }
1023
1024 static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba,
1025 struct ppa_addr ppa)
1026 {
1027 if (pblk->ppaf_bitsize < 32) {
1028 u32 *map = (u32 *)pblk->trans_map;
1029
1030 map[lba] = pblk_ppa64_to_ppa32(pblk, ppa);
1031 } else {
1032 u64 *map = (u64 *)pblk->trans_map;
1033
1034 map[lba] = ppa.ppa;
1035 }
1036 }
1037
1038 static inline int pblk_ppa_empty(struct ppa_addr ppa_addr)
1039 {
1040 return (ppa_addr.ppa == ADDR_EMPTY);
1041 }
1042
1043 static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr)
1044 {
1045 ppa_addr->ppa = ADDR_EMPTY;
1046 }
1047
1048 static inline bool pblk_ppa_comp(struct ppa_addr lppa, struct ppa_addr rppa)
1049 {
1050 return (lppa.ppa == rppa.ppa);
1051 }
1052
1053 static inline int pblk_addr_in_cache(struct ppa_addr ppa)
1054 {
1055 return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached);
1056 }
1057
1058 static inline int pblk_addr_to_cacheline(struct ppa_addr ppa)
1059 {
1060 return ppa.c.line;
1061 }
1062
1063 static inline struct ppa_addr pblk_cacheline_to_addr(int addr)
1064 {
1065 struct ppa_addr p;
1066
1067 p.c.line = addr;
1068 p.c.is_cached = 1;
1069
1070 return p;
1071 }
1072
1073 static inline u32 pblk_calc_meta_header_crc(struct pblk *pblk,
1074 struct line_header *header)
1075 {
1076 u32 crc = ~(u32)0;
1077
1078 crc = crc32_le(crc, (unsigned char *)header + sizeof(crc),
1079 sizeof(struct line_header) - sizeof(crc));
1080
1081 return crc;
1082 }
1083
1084 static inline u32 pblk_calc_smeta_crc(struct pblk *pblk,
1085 struct line_smeta *smeta)
1086 {
1087 struct pblk_line_meta *lm = &pblk->lm;
1088 u32 crc = ~(u32)0;
1089
1090 crc = crc32_le(crc, (unsigned char *)smeta +
1091 sizeof(struct line_header) + sizeof(crc),
1092 lm->smeta_len -
1093 sizeof(struct line_header) - sizeof(crc));
1094
1095 return crc;
1096 }
1097
1098 static inline u32 pblk_calc_emeta_crc(struct pblk *pblk,
1099 struct line_emeta *emeta)
1100 {
1101 struct pblk_line_meta *lm = &pblk->lm;
1102 u32 crc = ~(u32)0;
1103
1104 crc = crc32_le(crc, (unsigned char *)emeta +
1105 sizeof(struct line_header) + sizeof(crc),
1106 lm->emeta_len[0] -
1107 sizeof(struct line_header) - sizeof(crc));
1108
1109 return crc;
1110 }
1111
1112 static inline int pblk_set_progr_mode(struct pblk *pblk, int type)
1113 {
1114 struct nvm_tgt_dev *dev = pblk->dev;
1115 struct nvm_geo *geo = &dev->geo;
1116 int flags;
1117
1118 flags = geo->plane_mode >> 1;
1119
1120 if (type == PBLK_WRITE)
1121 flags |= NVM_IO_SCRAMBLE_ENABLE;
1122
1123 return flags;
1124 }
1125
1126 enum {
1127 PBLK_READ_RANDOM = 0,
1128 PBLK_READ_SEQUENTIAL = 1,
1129 };
1130
1131 static inline int pblk_set_read_mode(struct pblk *pblk, int type)
1132 {
1133 struct nvm_tgt_dev *dev = pblk->dev;
1134 struct nvm_geo *geo = &dev->geo;
1135 int flags;
1136
1137 flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE;
1138 if (type == PBLK_READ_SEQUENTIAL)
1139 flags |= geo->plane_mode >> 1;
1140
1141 return flags;
1142 }
1143
1144 static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs)
1145 {
1146 return !(nr_secs % pblk->min_write_pgs);
1147 }
1148
1149 #ifdef CONFIG_NVM_DEBUG
1150 static inline void print_ppa(struct ppa_addr *p, char *msg, int error)
1151 {
1152 if (p->c.is_cached) {
1153 pr_err("ppa: (%s: %x) cache line: %llu\n",
1154 msg, error, (u64)p->c.line);
1155 } else {
1156 pr_err("ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n",
1157 msg, error,
1158 p->g.ch, p->g.lun, p->g.blk,
1159 p->g.pg, p->g.pl, p->g.sec);
1160 }
1161 }
1162
1163 static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd,
1164 int error)
1165 {
1166 int bit = -1;
1167
1168 if (rqd->nr_ppas == 1) {
1169 print_ppa(&rqd->ppa_addr, "rqd", error);
1170 return;
1171 }
1172
1173 while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas,
1174 bit + 1)) < rqd->nr_ppas) {
1175 print_ppa(&rqd->ppa_list[bit], "rqd", error);
1176 }
1177
1178 pr_err("error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
1179 }
1180
1181 static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
1182 struct ppa_addr *ppas, int nr_ppas)
1183 {
1184 struct nvm_geo *geo = &tgt_dev->geo;
1185 struct ppa_addr *ppa;
1186 int i;
1187
1188 for (i = 0; i < nr_ppas; i++) {
1189 ppa = &ppas[i];
1190
1191 if (!ppa->c.is_cached &&
1192 ppa->g.ch < geo->nr_chnls &&
1193 ppa->g.lun < geo->nr_luns &&
1194 ppa->g.pl < geo->nr_planes &&
1195 ppa->g.blk < geo->nr_chks &&
1196 ppa->g.pg < geo->ws_per_chk &&
1197 ppa->g.sec < geo->sec_per_pg)
1198 continue;
1199
1200 print_ppa(ppa, "boundary", i);
1201
1202 return 1;
1203 }
1204 return 0;
1205 }
1206
1207 static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd)
1208 {
1209 struct nvm_tgt_dev *dev = pblk->dev;
1210 struct ppa_addr *ppa_list;
1211
1212 ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
1213
1214 if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
1215 WARN_ON(1);
1216 return -EINVAL;
1217 }
1218
1219 if (rqd->opcode == NVM_OP_PWRITE) {
1220 struct pblk_line *line;
1221 struct ppa_addr ppa;
1222 int i;
1223
1224 for (i = 0; i < rqd->nr_ppas; i++) {
1225 ppa = ppa_list[i];
1226 line = &pblk->lines[pblk_ppa_to_line(ppa)];
1227
1228 spin_lock(&line->lock);
1229 if (line->state != PBLK_LINESTATE_OPEN) {
1230 pr_err("pblk: bad ppa: line:%d,state:%d\n",
1231 line->id, line->state);
1232 WARN_ON(1);
1233 spin_unlock(&line->lock);
1234 return -EINVAL;
1235 }
1236 spin_unlock(&line->lock);
1237 }
1238 }
1239
1240 return 0;
1241 }
1242 #endif
1243
1244 static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr)
1245 {
1246 struct pblk_line_meta *lm = &pblk->lm;
1247
1248 if (paddr > lm->sec_per_line)
1249 return 1;
1250
1251 return 0;
1252 }
1253
1254 static inline unsigned int pblk_get_bi_idx(struct bio *bio)
1255 {
1256 return bio->bi_iter.bi_idx;
1257 }
1258
1259 static inline sector_t pblk_get_lba(struct bio *bio)
1260 {
1261 return bio->bi_iter.bi_sector / NR_PHY_IN_LOG;
1262 }
1263
1264 static inline unsigned int pblk_get_secs(struct bio *bio)
1265 {
1266 return bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE;
1267 }
1268
1269 static inline void pblk_setup_uuid(struct pblk *pblk)
1270 {
1271 uuid_le uuid;
1272
1273 uuid_le_gen(&uuid);
1274 memcpy(pblk->instance_uuid, uuid.b, 16);
1275 }
1276 #endif /* PBLK_H_ */
CRIS linux kernel tree