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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 | ||
64 | enum { | |
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 | ||
76 | enum { | |
77 | PBLK_BLK_ST_OPEN = 0x1, | |
78 | PBLK_BLK_ST_CLOSED = 0x2, | |
79 | }; | |
80 | ||
b20ba1bc JG |
81 | struct 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 | |
91 | enum { | |
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 |
100 | struct 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 */ |
110 | struct pblk_g_ctx { | |
111 | void *private; | |
a4bd217b JG |
112 | }; |
113 | ||
ee8d5c1a JG |
114 | /* Pad context */ |
115 | struct pblk_pad_rq { | |
116 | struct pblk *pblk; | |
117 | struct completion wait; | |
118 | struct kref ref; | |
119 | }; | |
120 | ||
a4bd217b JG |
121 | /* Recovery context */ |
122 | struct 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 */ | |
130 | struct 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 | ||
139 | struct 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 | ||
148 | struct pblk_rb_pages { | |
149 | struct page *pages; | |
150 | int order; | |
151 | struct list_head list; | |
152 | }; | |
153 | ||
154 | struct 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 | ||
196 | struct 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 | ||
207 | struct 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 | ||
216 | struct 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 | ||
245 | struct 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 | ||
289 | enum { | |
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 | ||
314 | struct 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 | ||
323 | struct 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 | */ |
351 | struct 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 | ||
372 | struct 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 | ||
384 | struct pblk_smeta { | |
385 | struct line_smeta *buf; /* smeta buffer in persistent format */ | |
a4bd217b JG |
386 | }; |
387 | ||
388 | struct 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 | 436 | enum { |
a4bd217b JG |
437 | PBLK_KMALLOC_META = 1, |
438 | PBLK_VMALLOC_META = 2, | |
439 | }; | |
440 | ||
dd2a4343 JG |
441 | enum { |
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 | ||
447 | struct 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 | ||
494 | struct 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 | ||
526 | struct 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 |
541 | enum { |
542 | PBLK_STATE_RUNNING = 0, | |
543 | PBLK_STATE_STOPPING = 1, | |
544 | PBLK_STATE_RECOVERING = 2, | |
545 | PBLK_STATE_STOPPED = 3, | |
546 | }; | |
547 | ||
a4bd217b JG |
548 | struct 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 | ||
636 | struct 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 | */ | |
649 | int pblk_rb_init(struct pblk_rb *rb, struct pblk_rb_entry *rb_entry_base, | |
650 | unsigned int power_size, unsigned int power_seg_sz); | |
651 | unsigned int pblk_rb_calculate_size(unsigned int nr_entries); | |
652 | void *pblk_rb_entries_ref(struct pblk_rb *rb); | |
653 | int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio, | |
654 | unsigned int nr_entries, unsigned int *pos); | |
655 | int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries, | |
656 | unsigned int *pos); | |
657 | void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data, | |
658 | struct pblk_w_ctx w_ctx, unsigned int pos); | |
659 | void 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); | |
662 | struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos); | |
588726d3 | 663 | void pblk_rb_flush(struct pblk_rb *rb); |
a4bd217b JG |
664 | |
665 | void pblk_rb_sync_l2p(struct pblk_rb *rb); | |
d624f371 JG |
666 | unsigned 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 |
669 | unsigned int pblk_rb_read_to_bio_list(struct pblk_rb *rb, struct bio *bio, |
670 | struct list_head *list, | |
671 | unsigned int max); | |
672 | int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba, | |
07698466 | 673 | struct ppa_addr ppa, int bio_iter); |
a4bd217b JG |
674 | unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries); |
675 | ||
676 | unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags); | |
677 | unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries); | |
678 | struct pblk_rb_entry *pblk_rb_sync_scan_entry(struct pblk_rb *rb, | |
679 | struct ppa_addr *ppa); | |
680 | void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags); | |
681 | unsigned int pblk_rb_sync_point_count(struct pblk_rb *rb); | |
682 | ||
683 | unsigned int pblk_rb_read_count(struct pblk_rb *rb); | |
ee8d5c1a | 684 | unsigned int pblk_rb_sync_count(struct pblk_rb *rb); |
a4bd217b JG |
685 | unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos); |
686 | ||
687 | int pblk_rb_tear_down_check(struct pblk_rb *rb); | |
688 | int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos); | |
689 | void pblk_rb_data_free(struct pblk_rb *rb); | |
690 | ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf); | |
691 | ||
692 | /* | |
693 | * pblk core | |
694 | */ | |
695 | struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int rw); | |
c2e9f5d4 | 696 | void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write); |
a4bd217b JG |
697 | int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd, |
698 | struct pblk_c_ctx *c_ctx); | |
699 | void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int rw); | |
588726d3 | 700 | void pblk_wait_for_meta(struct pblk *pblk); |
a4bd217b JG |
701 | struct ppa_addr pblk_get_lba_map(struct pblk *pblk, sector_t lba); |
702 | void pblk_discard(struct pblk *pblk, struct bio *bio); | |
703 | void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd); | |
704 | void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd); | |
705 | int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd); | |
dd2a4343 | 706 | int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line); |
a4bd217b JG |
707 | struct 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 |
710 | struct pblk_line *pblk_line_get(struct pblk *pblk); |
711 | struct pblk_line *pblk_line_get_first_data(struct pblk *pblk); | |
588726d3 | 712 | void pblk_line_replace_data(struct pblk *pblk); |
a4bd217b JG |
713 | int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line); |
714 | void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line); | |
715 | struct pblk_line *pblk_line_get_data(struct pblk *pblk); | |
d624f371 | 716 | struct pblk_line *pblk_line_get_erase(struct pblk *pblk); |
a4bd217b JG |
717 | int pblk_line_erase(struct pblk *pblk, struct pblk_line *line); |
718 | int pblk_line_is_full(struct pblk_line *line); | |
719 | void pblk_line_free(struct pblk *pblk, struct pblk_line *line); | |
dd2a4343 | 720 | void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line); |
a4bd217b | 721 | void pblk_line_close(struct pblk *pblk, struct pblk_line *line); |
588726d3 | 722 | void pblk_line_close_meta_sync(struct pblk *pblk); |
dd2a4343 | 723 | void pblk_line_close_ws(struct work_struct *work); |
588726d3 | 724 | void pblk_pipeline_stop(struct pblk *pblk); |
a4bd217b JG |
725 | void pblk_line_mark_bb(struct work_struct *work); |
726 | void 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 |
729 | u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line); |
730 | int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line); | |
dd2a4343 JG |
731 | int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line, |
732 | void *emeta_buf); | |
a4bd217b JG |
733 | int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa); |
734 | void pblk_line_put(struct kref *ref); | |
735 | struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line); | |
dd2a4343 JG |
736 | u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line); |
737 | void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); | |
a4bd217b | 738 | u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); |
dd2a4343 | 739 | u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); |
a4bd217b JG |
740 | int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail, |
741 | unsigned long secs_to_flush); | |
3eaa11e2 | 742 | void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas); |
a4bd217b JG |
743 | void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, |
744 | unsigned long *lun_bitmap); | |
3eaa11e2 | 745 | void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas); |
a4bd217b JG |
746 | void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, |
747 | unsigned long *lun_bitmap); | |
748 | void pblk_end_bio_sync(struct bio *bio); | |
749 | void pblk_end_io_sync(struct nvm_rq *rqd); | |
750 | int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, | |
751 | int nr_pages); | |
a4bd217b JG |
752 | void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, |
753 | int nr_pages); | |
754 | void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa); | |
0880a9aa JG |
755 | void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, |
756 | u64 paddr); | |
a4bd217b JG |
757 | void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa); |
758 | void pblk_update_map_cache(struct pblk *pblk, sector_t lba, | |
759 | struct ppa_addr ppa); | |
760 | void pblk_update_map_dev(struct pblk *pblk, sector_t lba, | |
761 | struct ppa_addr ppa, struct ppa_addr entry_line); | |
762 | int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa, | |
763 | struct pblk_line *gc_line); | |
764 | void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas, | |
765 | u64 *lba_list, int nr_secs); | |
766 | void 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 | */ | |
772 | int pblk_write_to_cache(struct pblk *pblk, struct bio *bio, | |
773 | unsigned long flags); | |
774 | int 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 | */ | |
781 | void 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); | |
784 | void 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 | */ | |
791 | int pblk_write_ts(void *data); | |
792 | void pblk_write_timer_fn(unsigned long data); | |
793 | void pblk_write_should_kick(struct pblk *pblk); | |
794 | ||
795 | /* | |
796 | * pblk read path | |
797 | */ | |
b25d5237 | 798 | extern struct bio_set *pblk_bio_set; |
a4bd217b JG |
799 | int pblk_submit_read(struct pblk *pblk, struct bio *bio); |
800 | int 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 | */ | |
806 | void pblk_submit_rec(struct work_struct *work); | |
807 | struct pblk_line *pblk_recov_l2p(struct pblk *pblk); | |
588726d3 | 808 | int pblk_recov_pad(struct pblk *pblk); |
a4bd217b JG |
809 | __le64 *pblk_recov_get_lba_list(struct pblk *pblk, struct line_emeta *emeta); |
810 | int 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 | |
822 | int pblk_gc_init(struct pblk *pblk); | |
823 | void pblk_gc_exit(struct pblk *pblk); | |
824 | void pblk_gc_should_start(struct pblk *pblk); | |
825 | void pblk_gc_should_stop(struct pblk *pblk); | |
b20ba1bc JG |
826 | void pblk_gc_should_kick(struct pblk *pblk); |
827 | void pblk_gc_kick(struct pblk *pblk); | |
a4bd217b JG |
828 | void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled, |
829 | int *gc_active); | |
b20ba1bc | 830 | int pblk_gc_sysfs_force(struct pblk *pblk, int force); |
a4bd217b JG |
831 | |
832 | /* | |
833 | * pblk rate limiter | |
834 | */ | |
835 | void pblk_rl_init(struct pblk_rl *rl, int budget); | |
836 | void pblk_rl_free(struct pblk_rl *rl); | |
b20ba1bc JG |
837 | int pblk_rl_high_thrs(struct pblk_rl *rl); |
838 | int pblk_rl_low_thrs(struct pblk_rl *rl); | |
a4bd217b JG |
839 | unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl); |
840 | int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries); | |
588726d3 | 841 | void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries); |
a4bd217b JG |
842 | void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries); |
843 | int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries); | |
844 | void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries); | |
845 | void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc); | |
a4bd217b JG |
846 | int pblk_rl_sysfs_rate_show(struct pblk_rl *rl); |
847 | void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line); | |
848 | void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line); | |
588726d3 JG |
849 | void pblk_rl_set_space_limit(struct pblk_rl *rl, int entries_left); |
850 | int pblk_rl_is_limit(struct pblk_rl *rl); | |
a4bd217b JG |
851 | |
852 | /* | |
853 | * pblk sysfs | |
854 | */ | |
855 | int pblk_sysfs_init(struct gendisk *tdisk); | |
856 | void pblk_sysfs_exit(struct gendisk *tdisk); | |
857 | ||
858 | static 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 | ||
865 | static 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 | ||
873 | static 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 |
878 | static inline void *emeta_to_bb(struct line_emeta *emeta) |
879 | { | |
880 | return emeta->bb_bitmap; | |
881 | } | |
882 | ||
883 | static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta) | |
884 | { | |
885 | return ((void *)emeta + pblk->lm.emeta_len[1]); | |
886 | } | |
887 | ||
888 | static 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 |
893 | static 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 | ||
906 | static 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 | ||
914 | static inline int pblk_dev_ppa_to_line(struct ppa_addr p) | |
915 | { | |
916 | return p.g.blk; | |
917 | } | |
918 | ||
919 | static inline int pblk_tgt_ppa_to_line(struct ppa_addr p) | |
920 | { | |
921 | return p.g.blk; | |
922 | } | |
923 | ||
924 | static 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 */ | |
930 | static 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 | ||
935 | static 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 | ||
964 | static 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 | ||
982 | static 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 | ||
1003 | static 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 | ||
1017 | static 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 | ||
1032 | static inline int pblk_ppa_empty(struct ppa_addr ppa_addr) | |
1033 | { | |
1034 | return (ppa_addr.ppa == ADDR_EMPTY); | |
1035 | } | |
1036 | ||
1037 | static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr) | |
1038 | { | |
1039 | ppa_addr->ppa = ADDR_EMPTY; | |
1040 | } | |
1041 | ||
07698466 JG |
1042 | static 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 |
1050 | static inline int pblk_addr_in_cache(struct ppa_addr ppa) |
1051 | { | |
1052 | return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached); | |
1053 | } | |
1054 | ||
1055 | static inline int pblk_addr_to_cacheline(struct ppa_addr ppa) | |
1056 | { | |
1057 | return ppa.c.line; | |
1058 | } | |
1059 | ||
1060 | static 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 | ||
1070 | static 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 | ||
1086 | static 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 | ||
1096 | static 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 | ||
1107 | static 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 | ||
1121 | static 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 | ||
1135 | static 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 |
1149 | enum { |
1150 | PBLK_READ_RANDOM = 0, | |
1151 | PBLK_READ_SEQUENTIAL = 1, | |
1152 | }; | |
1153 | ||
1154 | static 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 | ||
1167 | static 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 | |
1173 | static 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 | ||
1186 | static 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 | ||
1205 | static 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 | ||
1232 | static 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 | ||
1242 | static inline unsigned int pblk_get_bi_idx(struct bio *bio) | |
1243 | { | |
1244 | return bio->bi_iter.bi_idx; | |
1245 | } | |
1246 | ||
1247 | static inline sector_t pblk_get_lba(struct bio *bio) | |
1248 | { | |
1249 | return bio->bi_iter.bi_sector / NR_PHY_IN_LOG; | |
1250 | } | |
1251 | ||
1252 | static inline unsigned int pblk_get_secs(struct bio *bio) | |
1253 | { | |
1254 | return bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE; | |
1255 | } | |
1256 | ||
1257 | static inline sector_t pblk_get_sector(sector_t lba) | |
1258 | { | |
1259 | return lba * NR_PHY_IN_LOG; | |
1260 | } | |
1261 | ||
1262 | static 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_ */ |