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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_NR_CLOSE_JOBS (4) |
44 | ||
a4bd217b JG |
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 | ||
0d880398 | 54 | /* Static pool sizes */ |
b84ae4a8 JG |
55 | #define PBLK_GEN_WS_POOL_SIZE (2) |
56 | ||
e5392739 JG |
57 | #define PBLK_DEFAULT_OP (11) |
58 | ||
e2cddf20 JG |
59 | enum { |
60 | PBLK_READ = READ, | |
61 | PBLK_WRITE = WRITE,/* Write from write buffer */ | |
62 | PBLK_WRITE_INT, /* Internal write - no write buffer */ | |
8f554597 | 63 | PBLK_READ_RECOV, /* Recovery read - errors allowed */ |
e2cddf20 JG |
64 | PBLK_ERASE, |
65 | }; | |
66 | ||
a4bd217b JG |
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 | ||
b20ba1bc JG |
84 | struct pblk_sec_meta { |
85 | u64 reserved; | |
86 | __le64 lba; | |
87 | }; | |
88 | ||
a4bd217b JG |
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 | */ | |
48b8d208 | 92 | #define PBLK_GC_NR_LISTS 4 |
a4bd217b JG |
93 | |
94 | enum { | |
48b8d208 HH |
95 | PBLK_RL_OFF = 0, |
96 | PBLK_RL_WERR = 1, | |
97 | PBLK_RL_HIGH = 2, | |
98 | PBLK_RL_MID = 3, | |
99 | PBLK_RL_LOW = 4 | |
a4bd217b JG |
100 | }; |
101 | ||
a4bd217b | 102 | #define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS) |
a4809fee | 103 | #define pblk_dma_ppa_size (sizeof(u64) * PBLK_MAX_REQ_ADDRS) |
a4bd217b | 104 | |
084ec9ba | 105 | /* write buffer completion context */ |
a4bd217b JG |
106 | struct pblk_c_ctx { |
107 | struct list_head list; /* Head for out-of-order completion */ | |
108 | ||
109 | unsigned long *lun_bitmap; /* Luns used on current request */ | |
110 | unsigned int sentry; | |
111 | unsigned int nr_valid; | |
112 | unsigned int nr_padded; | |
113 | }; | |
114 | ||
a4809fee | 115 | /* read context */ |
084ec9ba JG |
116 | struct pblk_g_ctx { |
117 | void *private; | |
998ba629 | 118 | unsigned long start_time; |
a4809fee | 119 | u64 lba; |
a4bd217b JG |
120 | }; |
121 | ||
ee8d5c1a JG |
122 | /* Pad context */ |
123 | struct pblk_pad_rq { | |
124 | struct pblk *pblk; | |
125 | struct completion wait; | |
126 | struct kref ref; | |
127 | }; | |
128 | ||
a4bd217b JG |
129 | /* Recovery context */ |
130 | struct pblk_rec_ctx { | |
131 | struct pblk *pblk; | |
132 | struct nvm_rq *rqd; | |
a4bd217b JG |
133 | struct work_struct ws_rec; |
134 | }; | |
135 | ||
136 | /* Write context */ | |
137 | struct pblk_w_ctx { | |
138 | struct bio_list bios; /* Original bios - used for completion | |
139 | * in REQ_FUA, REQ_FLUSH case | |
140 | */ | |
ef697902 | 141 | u64 lba; /* Logic addr. associated with entry */ |
a4bd217b JG |
142 | struct ppa_addr ppa; /* Physic addr. associated with entry */ |
143 | int flags; /* Write context flags */ | |
144 | }; | |
145 | ||
146 | struct pblk_rb_entry { | |
147 | struct ppa_addr cacheline; /* Cacheline for this entry */ | |
148 | void *data; /* Pointer to data on this entry */ | |
149 | struct pblk_w_ctx w_ctx; /* Context for this entry */ | |
150 | struct list_head index; /* List head to enable indexes */ | |
151 | }; | |
152 | ||
153 | #define EMPTY_ENTRY (~0U) | |
154 | ||
155 | struct pblk_rb_pages { | |
156 | struct page *pages; | |
157 | int order; | |
158 | struct list_head list; | |
159 | }; | |
160 | ||
161 | struct pblk_rb { | |
162 | struct pblk_rb_entry *entries; /* Ring buffer entries */ | |
163 | unsigned int mem; /* Write offset - points to next | |
164 | * writable entry in memory | |
165 | */ | |
166 | unsigned int subm; /* Read offset - points to last entry | |
167 | * that has been submitted to the media | |
168 | * to be persisted | |
169 | */ | |
170 | unsigned int sync; /* Synced - backpointer that signals | |
171 | * the last submitted entry that has | |
172 | * been successfully persisted to media | |
173 | */ | |
8154d296 | 174 | unsigned int flush_point; /* Sync point - last entry that must be |
a4bd217b JG |
175 | * flushed to the media. Used with |
176 | * REQ_FLUSH and REQ_FUA | |
177 | */ | |
178 | unsigned int l2p_update; /* l2p update point - next entry for | |
179 | * which l2p mapping will be updated to | |
180 | * contain a device ppa address (instead | |
181 | * of a cacheline | |
182 | */ | |
183 | unsigned int nr_entries; /* Number of entries in write buffer - | |
184 | * must be a power of two | |
185 | */ | |
186 | unsigned int seg_size; /* Size of the data segments being | |
187 | * stored on each entry. Typically this | |
188 | * will be 4KB | |
189 | */ | |
190 | ||
191 | struct list_head pages; /* List of data pages */ | |
192 | ||
193 | spinlock_t w_lock; /* Write lock */ | |
194 | spinlock_t s_lock; /* Sync lock */ | |
195 | ||
196 | #ifdef CONFIG_NVM_DEBUG | |
8154d296 | 197 | atomic_t inflight_flush_point; /* Not served REQ_FLUSH | REQ_FUA */ |
a4bd217b JG |
198 | #endif |
199 | }; | |
200 | ||
201 | #define PBLK_RECOVERY_SECTORS 16 | |
202 | ||
203 | struct pblk_lun { | |
204 | struct ppa_addr bppa; | |
a4bd217b JG |
205 | struct semaphore wr_sem; |
206 | }; | |
207 | ||
208 | struct pblk_gc_rq { | |
209 | struct pblk_line *line; | |
210 | void *data; | |
d340121e | 211 | u64 paddr_list[PBLK_MAX_REQ_ADDRS]; |
b20ba1bc | 212 | u64 lba_list[PBLK_MAX_REQ_ADDRS]; |
a4bd217b JG |
213 | int nr_secs; |
214 | int secs_to_gc; | |
215 | struct list_head list; | |
216 | }; | |
217 | ||
218 | struct pblk_gc { | |
b20ba1bc JG |
219 | /* These states are not protected by a lock since (i) they are in the |
220 | * fast path, and (ii) they are not critical. | |
221 | */ | |
a4bd217b JG |
222 | int gc_active; |
223 | int gc_enabled; | |
224 | int gc_forced; | |
a4bd217b JG |
225 | |
226 | struct task_struct *gc_ts; | |
227 | struct task_struct *gc_writer_ts; | |
b20ba1bc JG |
228 | struct task_struct *gc_reader_ts; |
229 | ||
230 | struct workqueue_struct *gc_line_reader_wq; | |
a4bd217b | 231 | struct workqueue_struct *gc_reader_wq; |
b20ba1bc | 232 | |
a4bd217b JG |
233 | struct timer_list gc_timer; |
234 | ||
b20ba1bc | 235 | struct semaphore gc_sem; |
d6b992f7 HH |
236 | atomic_t read_inflight_gc; /* Number of lines with inflight GC reads */ |
237 | atomic_t pipeline_gc; /* Number of lines in the GC pipeline - | |
238 | * started reads to finished writes | |
239 | */ | |
a4bd217b | 240 | int w_entries; |
b20ba1bc | 241 | |
a4bd217b | 242 | struct list_head w_list; |
b20ba1bc | 243 | struct list_head r_list; |
a4bd217b JG |
244 | |
245 | spinlock_t lock; | |
246 | spinlock_t w_lock; | |
b20ba1bc | 247 | spinlock_t r_lock; |
a4bd217b JG |
248 | }; |
249 | ||
250 | struct pblk_rl { | |
251 | unsigned int high; /* Upper threshold for rate limiter (free run - | |
252 | * user I/O rate limiter | |
253 | */ | |
a4bd217b JG |
254 | unsigned int high_pw; /* High rounded up as a power of 2 */ |
255 | ||
b20ba1bc JG |
256 | #define PBLK_USER_HIGH_THRS 8 /* Begin write limit at 12% available blks */ |
257 | #define PBLK_USER_LOW_THRS 10 /* Aggressive GC at 10% available blocks */ | |
a4bd217b JG |
258 | |
259 | int rb_windows_pw; /* Number of rate windows in the write buffer | |
260 | * given as a power-of-2. This guarantees that | |
261 | * when user I/O is being rate limited, there | |
262 | * will be reserved enough space for the GC to | |
263 | * place its payload. A window is of | |
264 | * pblk->max_write_pgs size, which in NVMe is | |
265 | * 64, i.e., 256kb. | |
266 | */ | |
267 | int rb_budget; /* Total number of entries available for I/O */ | |
268 | int rb_user_max; /* Max buffer entries available for user I/O */ | |
a4bd217b JG |
269 | int rb_gc_max; /* Max buffer entries available for GC I/O */ |
270 | int rb_gc_rsv; /* Reserved buffer entries for GC I/O */ | |
271 | int rb_state; /* Rate-limiter current state */ | |
da67e68f | 272 | int rb_max_io; /* Maximum size for an I/O giving the config */ |
588726d3 JG |
273 | |
274 | atomic_t rb_user_cnt; /* User I/O buffer counter */ | |
a4bd217b | 275 | atomic_t rb_gc_cnt; /* GC I/O buffer counter */ |
588726d3 | 276 | atomic_t rb_space; /* Space limit in case of reaching capacity */ |
a4bd217b | 277 | |
b20ba1bc JG |
278 | int rsv_blocks; /* Reserved blocks for GC */ |
279 | ||
a4bd217b | 280 | int rb_user_active; |
b20ba1bc JG |
281 | int rb_gc_active; |
282 | ||
48b8d208 HH |
283 | atomic_t werr_lines; /* Number of write error lines that needs gc */ |
284 | ||
a4bd217b JG |
285 | struct timer_list u_timer; |
286 | ||
287 | unsigned long long nr_secs; | |
288 | unsigned long total_blocks; | |
a7689938 JG |
289 | |
290 | atomic_t free_blocks; /* Total number of free blocks (+ OP) */ | |
291 | atomic_t free_user_blocks; /* Number of user free blocks (no OP) */ | |
a4bd217b JG |
292 | }; |
293 | ||
a4bd217b JG |
294 | #define PBLK_LINE_EMPTY (~0U) |
295 | ||
296 | enum { | |
297 | /* Line Types */ | |
298 | PBLK_LINETYPE_FREE = 0, | |
299 | PBLK_LINETYPE_LOG = 1, | |
300 | PBLK_LINETYPE_DATA = 2, | |
301 | ||
302 | /* Line state */ | |
32ef9412 | 303 | PBLK_LINESTATE_NEW = 9, |
a4bd217b JG |
304 | PBLK_LINESTATE_FREE = 10, |
305 | PBLK_LINESTATE_OPEN = 11, | |
306 | PBLK_LINESTATE_CLOSED = 12, | |
307 | PBLK_LINESTATE_GC = 13, | |
308 | PBLK_LINESTATE_BAD = 14, | |
309 | PBLK_LINESTATE_CORRUPT = 15, | |
310 | ||
311 | /* GC group */ | |
312 | PBLK_LINEGC_NONE = 20, | |
313 | PBLK_LINEGC_EMPTY = 21, | |
314 | PBLK_LINEGC_LOW = 22, | |
315 | PBLK_LINEGC_MID = 23, | |
316 | PBLK_LINEGC_HIGH = 24, | |
317 | PBLK_LINEGC_FULL = 25, | |
48b8d208 | 318 | PBLK_LINEGC_WERR = 26 |
a4bd217b JG |
319 | }; |
320 | ||
321 | #define PBLK_MAGIC 0x70626c6b /*pblk*/ | |
d0ab0b1a HH |
322 | |
323 | /* emeta/smeta persistent storage format versions: | |
324 | * Changes in major version requires offline migration. | |
325 | * Changes in minor version are handled automatically during | |
326 | * recovery. | |
327 | */ | |
328 | ||
329 | #define SMETA_VERSION_MAJOR (0) | |
330 | #define SMETA_VERSION_MINOR (1) | |
331 | ||
332 | #define EMETA_VERSION_MAJOR (0) | |
76758390 | 333 | #define EMETA_VERSION_MINOR (2) |
a4bd217b JG |
334 | |
335 | struct line_header { | |
336 | __le32 crc; | |
337 | __le32 identifier; /* pblk identifier */ | |
338 | __u8 uuid[16]; /* instance uuid */ | |
339 | __le16 type; /* line type */ | |
d0ab0b1a HH |
340 | __u8 version_major; /* version major */ |
341 | __u8 version_minor; /* version minor */ | |
a4bd217b JG |
342 | __le32 id; /* line id for current line */ |
343 | }; | |
344 | ||
345 | struct line_smeta { | |
346 | struct line_header header; | |
347 | ||
348 | __le32 crc; /* Full structure including struct crc */ | |
349 | /* Previous line metadata */ | |
350 | __le32 prev_id; /* Line id for previous line */ | |
351 | ||
352 | /* Current line metadata */ | |
353 | __le64 seq_nr; /* Sequence number for current line */ | |
354 | ||
355 | /* Active writers */ | |
356 | __le32 window_wr_lun; /* Number of parallel LUNs to write */ | |
357 | ||
358 | __le32 rsvd[2]; | |
dd2a4343 JG |
359 | |
360 | __le64 lun_bitmap[]; | |
a4bd217b JG |
361 | }; |
362 | ||
76758390 | 363 | |
a4bd217b | 364 | /* |
dd2a4343 JG |
365 | * Metadata layout in media: |
366 | * First sector: | |
367 | * 1. struct line_emeta | |
368 | * 2. bad block bitmap (u64 * window_wr_lun) | |
76758390 | 369 | * 3. write amplification counters |
dd2a4343 JG |
370 | * Mid sectors (start at lbas_sector): |
371 | * 3. nr_lbas (u64) forming lba list | |
372 | * Last sectors (start at vsc_sector): | |
373 | * 4. u32 valid sector count (vsc) for all lines (~0U: free line) | |
a4bd217b JG |
374 | */ |
375 | struct line_emeta { | |
376 | struct line_header header; | |
377 | ||
378 | __le32 crc; /* Full structure including struct crc */ | |
379 | ||
380 | /* Previous line metadata */ | |
381 | __le32 prev_id; /* Line id for prev line */ | |
382 | ||
383 | /* Current line metadata */ | |
384 | __le64 seq_nr; /* Sequence number for current line */ | |
385 | ||
386 | /* Active writers */ | |
387 | __le32 window_wr_lun; /* Number of parallel LUNs to write */ | |
388 | ||
389 | /* Bookkeeping for recovery */ | |
390 | __le32 next_id; /* Line id for next line */ | |
391 | __le64 nr_lbas; /* Number of lbas mapped in line */ | |
392 | __le64 nr_valid_lbas; /* Number of valid lbas mapped in line */ | |
76758390 HH |
393 | __le64 bb_bitmap[]; /* Updated bad block bitmap for line */ |
394 | }; | |
395 | ||
396 | ||
397 | /* Write amplification counters stored on media */ | |
398 | struct wa_counters { | |
399 | __le64 user; /* Number of user written sectors */ | |
400 | __le64 gc; /* Number of sectors written by GC*/ | |
401 | __le64 pad; /* Number of padded sectors */ | |
dd2a4343 JG |
402 | }; |
403 | ||
404 | struct pblk_emeta { | |
405 | struct line_emeta *buf; /* emeta buffer in media format */ | |
406 | int mem; /* Write offset - points to next | |
407 | * writable entry in memory | |
408 | */ | |
409 | atomic_t sync; /* Synced - backpointer that signals the | |
410 | * last entry that has been successfully | |
411 | * persisted to media | |
412 | */ | |
413 | unsigned int nr_entries; /* Number of emeta entries */ | |
414 | }; | |
415 | ||
416 | struct pblk_smeta { | |
417 | struct line_smeta *buf; /* smeta buffer in persistent format */ | |
a4bd217b JG |
418 | }; |
419 | ||
48b8d208 HH |
420 | struct pblk_w_err_gc { |
421 | int has_write_err; | |
422 | __le64 *lba_list; | |
423 | }; | |
424 | ||
a4bd217b JG |
425 | struct pblk_line { |
426 | struct pblk *pblk; | |
427 | unsigned int id; /* Line number corresponds to the | |
428 | * block line | |
429 | */ | |
430 | unsigned int seq_nr; /* Unique line sequence number */ | |
431 | ||
432 | int state; /* PBLK_LINESTATE_X */ | |
433 | int type; /* PBLK_LINETYPE_X */ | |
434 | int gc_group; /* PBLK_LINEGC_X */ | |
435 | struct list_head list; /* Free, GC lists */ | |
436 | ||
437 | unsigned long *lun_bitmap; /* Bitmap for LUNs mapped in line */ | |
438 | ||
32ef9412 JG |
439 | struct nvm_chk_meta *chks; /* Chunks forming line */ |
440 | ||
dd2a4343 JG |
441 | struct pblk_smeta *smeta; /* Start metadata */ |
442 | struct pblk_emeta *emeta; /* End medatada */ | |
443 | ||
a4bd217b | 444 | int meta_line; /* Metadata line id */ |
dd2a4343 JG |
445 | int meta_distance; /* Distance between data and metadata */ |
446 | ||
a4bd217b JG |
447 | u64 smeta_ssec; /* Sector where smeta starts */ |
448 | u64 emeta_ssec; /* Sector where emeta starts */ | |
449 | ||
450 | unsigned int sec_in_line; /* Number of usable secs in line */ | |
451 | ||
a44f53fa | 452 | atomic_t blk_in_line; /* Number of good blocks in line */ |
a4bd217b JG |
453 | unsigned long *blk_bitmap; /* Bitmap for valid/invalid blocks */ |
454 | unsigned long *erase_bitmap; /* Bitmap for erased blocks */ | |
455 | ||
456 | unsigned long *map_bitmap; /* Bitmap for mapped sectors in line */ | |
457 | unsigned long *invalid_bitmap; /* Bitmap for invalid sectors in line */ | |
458 | ||
a44f53fa | 459 | atomic_t left_eblks; /* Blocks left for erasing */ |
a4bd217b JG |
460 | atomic_t left_seblks; /* Blocks left for sync erasing */ |
461 | ||
462 | int left_msecs; /* Sectors left for mapping */ | |
a4bd217b | 463 | unsigned int cur_sec; /* Sector map pointer */ |
dd2a4343 JG |
464 | unsigned int nr_valid_lbas; /* Number of valid lbas in line */ |
465 | ||
466 | __le32 *vsc; /* Valid sector count in line */ | |
a4bd217b JG |
467 | |
468 | struct kref ref; /* Write buffer L2P references */ | |
469 | ||
48b8d208 HH |
470 | struct pblk_w_err_gc *w_err_gc; /* Write error gc recovery metadata */ |
471 | ||
a4bd217b JG |
472 | spinlock_t lock; /* Necessary for invalid_bitmap only */ |
473 | }; | |
474 | ||
a44f53fa | 475 | #define PBLK_DATA_LINES 4 |
a4bd217b | 476 | |
dd2a4343 | 477 | enum { |
a4bd217b JG |
478 | PBLK_KMALLOC_META = 1, |
479 | PBLK_VMALLOC_META = 2, | |
480 | }; | |
481 | ||
dd2a4343 JG |
482 | enum { |
483 | PBLK_EMETA_TYPE_HEADER = 1, /* struct line_emeta first sector */ | |
484 | PBLK_EMETA_TYPE_LLBA = 2, /* lba list - type: __le64 */ | |
485 | PBLK_EMETA_TYPE_VSC = 3, /* vsc list - type: __le32 */ | |
a4bd217b JG |
486 | }; |
487 | ||
488 | struct pblk_line_mgmt { | |
489 | int nr_lines; /* Total number of full lines */ | |
490 | int nr_free_lines; /* Number of full lines in free list */ | |
491 | ||
492 | /* Free lists - use free_lock */ | |
493 | struct list_head free_list; /* Full lines ready to use */ | |
494 | struct list_head corrupt_list; /* Full lines corrupted */ | |
495 | struct list_head bad_list; /* Full lines bad */ | |
496 | ||
497 | /* GC lists - use gc_lock */ | |
b20ba1bc | 498 | struct list_head *gc_lists[PBLK_GC_NR_LISTS]; |
a4bd217b JG |
499 | struct list_head gc_high_list; /* Full lines ready to GC, high isc */ |
500 | struct list_head gc_mid_list; /* Full lines ready to GC, mid isc */ | |
501 | struct list_head gc_low_list; /* Full lines ready to GC, low isc */ | |
502 | ||
48b8d208 HH |
503 | struct list_head gc_werr_list; /* Write err recovery list */ |
504 | ||
a4bd217b JG |
505 | struct list_head gc_full_list; /* Full lines ready to GC, no valid */ |
506 | struct list_head gc_empty_list; /* Full lines close, all valid */ | |
507 | ||
508 | struct pblk_line *log_line; /* Current FTL log line */ | |
509 | struct pblk_line *data_line; /* Current data line */ | |
510 | struct pblk_line *log_next; /* Next FTL log line */ | |
511 | struct pblk_line *data_next; /* Next data line */ | |
512 | ||
dd2a4343 JG |
513 | struct list_head emeta_list; /* Lines queued to schedule emeta */ |
514 | ||
515 | __le32 *vsc_list; /* Valid sector counts for all lines */ | |
516 | ||
a4bd217b | 517 | /* Metadata allocation type: VMALLOC | KMALLOC */ |
a4bd217b JG |
518 | int emeta_alloc_type; |
519 | ||
520 | /* Pre-allocated metadata for data lines */ | |
dd2a4343 JG |
521 | struct pblk_smeta *sline_meta[PBLK_DATA_LINES]; |
522 | struct pblk_emeta *eline_meta[PBLK_DATA_LINES]; | |
a4bd217b JG |
523 | unsigned long meta_bitmap; |
524 | ||
525 | /* Helpers for fast bitmap calculations */ | |
526 | unsigned long *bb_template; | |
527 | unsigned long *bb_aux; | |
528 | ||
529 | unsigned long d_seq_nr; /* Data line unique sequence number */ | |
530 | unsigned long l_seq_nr; /* Log line unique sequence number */ | |
531 | ||
532 | spinlock_t free_lock; | |
dd2a4343 | 533 | spinlock_t close_lock; |
a4bd217b JG |
534 | spinlock_t gc_lock; |
535 | }; | |
536 | ||
537 | struct pblk_line_meta { | |
538 | unsigned int smeta_len; /* Total length for smeta */ | |
dd2a4343 JG |
539 | unsigned int smeta_sec; /* Sectors needed for smeta */ |
540 | ||
541 | unsigned int emeta_len[4]; /* Lengths for emeta: | |
76758390 HH |
542 | * [0]: Total |
543 | * [1]: struct line_emeta + | |
544 | * bb_bitmap + struct wa_counters | |
545 | * [2]: L2P portion | |
546 | * [3]: vsc | |
dd2a4343 JG |
547 | */ |
548 | unsigned int emeta_sec[4]; /* Sectors needed for emeta. Same layout | |
549 | * as emeta_len | |
550 | */ | |
551 | ||
a4bd217b | 552 | unsigned int emeta_bb; /* Boundary for bb that affects emeta */ |
dd2a4343 JG |
553 | |
554 | unsigned int vsc_list_len; /* Length for vsc list */ | |
a4bd217b JG |
555 | unsigned int sec_bitmap_len; /* Length for sector bitmap in line */ |
556 | unsigned int blk_bitmap_len; /* Length for block bitmap in line */ | |
557 | unsigned int lun_bitmap_len; /* Length for lun bitmap in line */ | |
558 | ||
559 | unsigned int blk_per_line; /* Number of blocks in a full line */ | |
560 | unsigned int sec_per_line; /* Number of sectors in a line */ | |
dd2a4343 | 561 | unsigned int dsec_per_line; /* Number of data sectors in a line */ |
a4bd217b JG |
562 | unsigned int min_blk_line; /* Min. number of good blocks in line */ |
563 | ||
564 | unsigned int mid_thrs; /* Threshold for GC mid list */ | |
565 | unsigned int high_thrs; /* Threshold for GC high list */ | |
dd2a4343 JG |
566 | |
567 | unsigned int meta_distance; /* Distance between data and metadata */ | |
a4bd217b JG |
568 | }; |
569 | ||
588726d3 JG |
570 | enum { |
571 | PBLK_STATE_RUNNING = 0, | |
572 | PBLK_STATE_STOPPING = 1, | |
573 | PBLK_STATE_RECOVERING = 2, | |
574 | PBLK_STATE_STOPPED = 3, | |
575 | }; | |
576 | ||
3b2a3ad1 JG |
577 | /* Internal format to support not power-of-2 device formats */ |
578 | struct pblk_addrf { | |
579 | /* gen to dev */ | |
580 | int sec_stripe; | |
581 | int ch_stripe; | |
582 | int lun_stripe; | |
583 | ||
584 | /* dev to gen */ | |
585 | int sec_lun_stripe; | |
586 | int sec_ws_stripe; | |
587 | }; | |
588 | ||
a4bd217b JG |
589 | struct pblk { |
590 | struct nvm_tgt_dev *dev; | |
591 | struct gendisk *disk; | |
592 | ||
593 | struct kobject kobj; | |
594 | ||
595 | struct pblk_lun *luns; | |
596 | ||
597 | struct pblk_line *lines; /* Line array */ | |
598 | struct pblk_line_mgmt l_mg; /* Line management */ | |
599 | struct pblk_line_meta lm; /* Line metadata */ | |
600 | ||
3b2a3ad1 JG |
601 | struct nvm_addrf addrf; /* Aligned address format */ |
602 | struct pblk_addrf uaddrf; /* Unaligned address format */ | |
bb845ae4 | 603 | int addrf_len; |
a4bd217b JG |
604 | |
605 | struct pblk_rb rwb; | |
606 | ||
588726d3 JG |
607 | int state; /* pblk line state */ |
608 | ||
a4bd217b JG |
609 | int min_write_pgs; /* Minimum amount of pages required by controller */ |
610 | int max_write_pgs; /* Maximum amount of pages supported by controller */ | |
611 | int pgs_in_buffer; /* Number of pages that need to be held in buffer to | |
612 | * guarantee successful reads. | |
613 | */ | |
614 | ||
615 | sector_t capacity; /* Device capacity when bad blocks are subtracted */ | |
a7689938 JG |
616 | |
617 | int op; /* Percentage of device used for over-provisioning */ | |
618 | int op_blks; /* Number of blocks used for over-provisioning */ | |
a4bd217b JG |
619 | |
620 | /* pblk provisioning values. Used by rate limiter */ | |
621 | struct pblk_rl rl; | |
622 | ||
c2e9f5d4 | 623 | int sec_per_write; |
a4bd217b JG |
624 | |
625 | unsigned char instance_uuid[16]; | |
76758390 HH |
626 | |
627 | /* Persistent write amplification counters, 4kb sector I/Os */ | |
628 | atomic64_t user_wa; /* Sectors written by user */ | |
629 | atomic64_t gc_wa; /* Sectors written by GC */ | |
630 | atomic64_t pad_wa; /* Padded sectors written */ | |
631 | ||
632 | /* Reset values for delta write amplification measurements */ | |
633 | u64 user_rst_wa; | |
634 | u64 gc_rst_wa; | |
635 | u64 pad_rst_wa; | |
636 | ||
5d149bfa HH |
637 | /* Counters used for calculating padding distribution */ |
638 | atomic64_t *pad_dist; /* Padding distribution buckets */ | |
639 | u64 nr_flush_rst; /* Flushes reset value for pad dist.*/ | |
640 | atomic64_t nr_flush; /* Number of flush/fua I/O */ | |
641 | ||
a4bd217b | 642 | #ifdef CONFIG_NVM_DEBUG |
76758390 | 643 | /* Non-persistent debug counters, 4kb sector I/Os */ |
a4bd217b JG |
644 | atomic_long_t inflight_writes; /* Inflight writes (user and gc) */ |
645 | atomic_long_t padded_writes; /* Sectors padded due to flush/fua */ | |
646 | atomic_long_t padded_wb; /* Sectors padded in write buffer */ | |
a4bd217b JG |
647 | atomic_long_t req_writes; /* Sectors stored on write buffer */ |
648 | atomic_long_t sub_writes; /* Sectors submitted from buffer */ | |
649 | atomic_long_t sync_writes; /* Sectors synced to media */ | |
a4bd217b | 650 | atomic_long_t inflight_reads; /* Inflight sector read requests */ |
db7ada33 | 651 | atomic_long_t cache_reads; /* Read requests that hit the cache */ |
a4bd217b JG |
652 | atomic_long_t sync_reads; /* Completed sector read requests */ |
653 | atomic_long_t recov_writes; /* Sectors submitted from recovery */ | |
654 | atomic_long_t recov_gc_writes; /* Sectors submitted from write GC */ | |
655 | atomic_long_t recov_gc_reads; /* Sectors submitted from read GC */ | |
656 | #endif | |
657 | ||
658 | spinlock_t lock; | |
659 | ||
660 | atomic_long_t read_failed; | |
661 | atomic_long_t read_empty; | |
662 | atomic_long_t read_high_ecc; | |
663 | atomic_long_t read_failed_gc; | |
664 | atomic_long_t write_failed; | |
665 | atomic_long_t erase_failed; | |
666 | ||
588726d3 JG |
667 | atomic_t inflight_io; /* General inflight I/O counter */ |
668 | ||
a4bd217b JG |
669 | struct task_struct *writer_ts; |
670 | ||
671 | /* Simple translation map of logical addresses to physical addresses. | |
672 | * The logical addresses is known by the host system, while the physical | |
673 | * addresses are used when writing to the disk block device. | |
674 | */ | |
675 | unsigned char *trans_map; | |
676 | spinlock_t trans_lock; | |
677 | ||
678 | struct list_head compl_list; | |
679 | ||
6a3abf5b HH |
680 | spinlock_t resubmit_lock; /* Resubmit list lock */ |
681 | struct list_head resubmit_list; /* Resubmit list for failed writes*/ | |
682 | ||
b906bbb6 KO |
683 | mempool_t page_bio_pool; |
684 | mempool_t gen_ws_pool; | |
685 | mempool_t rec_pool; | |
686 | mempool_t r_rq_pool; | |
687 | mempool_t w_rq_pool; | |
688 | mempool_t e_rq_pool; | |
a4bd217b | 689 | |
ef576494 JG |
690 | struct workqueue_struct *close_wq; |
691 | struct workqueue_struct *bb_wq; | |
7bd4d370 | 692 | struct workqueue_struct *r_end_wq; |
ef576494 | 693 | |
a4bd217b JG |
694 | struct timer_list wtimer; |
695 | ||
696 | struct pblk_gc gc; | |
697 | }; | |
698 | ||
699 | struct pblk_line_ws { | |
700 | struct pblk *pblk; | |
701 | struct pblk_line *line; | |
702 | void *priv; | |
703 | struct work_struct ws; | |
704 | }; | |
705 | ||
084ec9ba | 706 | #define pblk_g_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_g_ctx)) |
a4bd217b JG |
707 | #define pblk_w_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_c_ctx)) |
708 | ||
709 | /* | |
710 | * pblk ring buffer operations | |
711 | */ | |
712 | int pblk_rb_init(struct pblk_rb *rb, struct pblk_rb_entry *rb_entry_base, | |
713 | unsigned int power_size, unsigned int power_seg_sz); | |
714 | unsigned int pblk_rb_calculate_size(unsigned int nr_entries); | |
715 | void *pblk_rb_entries_ref(struct pblk_rb *rb); | |
716 | int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio, | |
717 | unsigned int nr_entries, unsigned int *pos); | |
718 | int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries, | |
719 | unsigned int *pos); | |
720 | void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data, | |
721 | struct pblk_w_ctx w_ctx, unsigned int pos); | |
722 | void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data, | |
d340121e JG |
723 | struct pblk_w_ctx w_ctx, struct pblk_line *line, |
724 | u64 paddr, unsigned int pos); | |
a4bd217b | 725 | struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos); |
588726d3 | 726 | void pblk_rb_flush(struct pblk_rb *rb); |
a4bd217b JG |
727 | |
728 | void pblk_rb_sync_l2p(struct pblk_rb *rb); | |
d624f371 | 729 | unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd, |
875d94f3 JG |
730 | unsigned int pos, unsigned int nr_entries, |
731 | unsigned int count); | |
a4bd217b | 732 | int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba, |
75cb8e93 | 733 | struct ppa_addr ppa, int bio_iter, bool advanced_bio); |
a4bd217b JG |
734 | unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries); |
735 | ||
736 | unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags); | |
737 | unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries); | |
738 | struct pblk_rb_entry *pblk_rb_sync_scan_entry(struct pblk_rb *rb, | |
739 | struct ppa_addr *ppa); | |
740 | void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags); | |
8154d296 | 741 | unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb); |
a4bd217b JG |
742 | |
743 | unsigned int pblk_rb_read_count(struct pblk_rb *rb); | |
ee8d5c1a | 744 | unsigned int pblk_rb_sync_count(struct pblk_rb *rb); |
a4bd217b JG |
745 | unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos); |
746 | ||
747 | int pblk_rb_tear_down_check(struct pblk_rb *rb); | |
748 | int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos); | |
749 | void pblk_rb_data_free(struct pblk_rb *rb); | |
750 | ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf); | |
751 | ||
752 | /* | |
753 | * pblk core | |
754 | */ | |
67bf26a3 JG |
755 | struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type); |
756 | void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type); | |
c2e9f5d4 | 757 | void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write); |
a4bd217b JG |
758 | int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd, |
759 | struct pblk_c_ctx *c_ctx); | |
a4bd217b | 760 | void pblk_discard(struct pblk *pblk, struct bio *bio); |
32ef9412 JG |
761 | struct nvm_chk_meta *pblk_chunk_get_info(struct pblk *pblk); |
762 | struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk, | |
763 | struct nvm_chk_meta *lp, | |
764 | struct ppa_addr ppa); | |
a4bd217b JG |
765 | void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd); |
766 | void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd); | |
767 | int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd); | |
1a94b2d4 | 768 | int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd); |
dd2a4343 | 769 | int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line); |
a4bd217b JG |
770 | struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data, |
771 | unsigned int nr_secs, unsigned int len, | |
de54e703 | 772 | int alloc_type, gfp_t gfp_mask); |
a4bd217b JG |
773 | struct pblk_line *pblk_line_get(struct pblk *pblk); |
774 | struct pblk_line *pblk_line_get_first_data(struct pblk *pblk); | |
21d22871 | 775 | struct pblk_line *pblk_line_replace_data(struct pblk *pblk); |
a4bd217b JG |
776 | int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line); |
777 | void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line); | |
778 | struct pblk_line *pblk_line_get_data(struct pblk *pblk); | |
d624f371 | 779 | struct pblk_line *pblk_line_get_erase(struct pblk *pblk); |
a4bd217b JG |
780 | int pblk_line_erase(struct pblk *pblk, struct pblk_line *line); |
781 | int pblk_line_is_full(struct pblk_line *line); | |
8e55c07b | 782 | void pblk_line_free(struct pblk_line *line); |
dd2a4343 | 783 | void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line); |
a4bd217b | 784 | void pblk_line_close(struct pblk *pblk, struct pblk_line *line); |
dd2a4343 | 785 | void pblk_line_close_ws(struct work_struct *work); |
588726d3 | 786 | void pblk_pipeline_stop(struct pblk *pblk); |
a7c9e910 JG |
787 | void __pblk_pipeline_stop(struct pblk *pblk); |
788 | void __pblk_pipeline_flush(struct pblk *pblk); | |
b84ae4a8 JG |
789 | void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv, |
790 | void (*work)(struct work_struct *), gfp_t gfp_mask, | |
791 | struct workqueue_struct *wq); | |
a4bd217b JG |
792 | u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line); |
793 | int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line); | |
dd2a4343 JG |
794 | int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line, |
795 | void *emeta_buf); | |
a4bd217b JG |
796 | int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa); |
797 | void pblk_line_put(struct kref *ref); | |
7bd4d370 | 798 | void pblk_line_put_wq(struct kref *ref); |
a4bd217b | 799 | struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line); |
dd2a4343 JG |
800 | u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line); |
801 | void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); | |
a4bd217b | 802 | u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); |
dd2a4343 | 803 | u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs); |
a4bd217b JG |
804 | int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail, |
805 | unsigned long secs_to_flush); | |
3eaa11e2 | 806 | void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas); |
a4bd217b JG |
807 | void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, |
808 | unsigned long *lun_bitmap); | |
3eaa11e2 | 809 | void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas); |
a4bd217b JG |
810 | void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas, |
811 | unsigned long *lun_bitmap); | |
a4bd217b JG |
812 | int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags, |
813 | int nr_pages); | |
a4bd217b JG |
814 | void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off, |
815 | int nr_pages); | |
816 | void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa); | |
0880a9aa JG |
817 | void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line, |
818 | u64 paddr); | |
a4bd217b JG |
819 | void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa); |
820 | void pblk_update_map_cache(struct pblk *pblk, sector_t lba, | |
821 | struct ppa_addr ppa); | |
822 | void pblk_update_map_dev(struct pblk *pblk, sector_t lba, | |
823 | struct ppa_addr ppa, struct ppa_addr entry_line); | |
824 | int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa, | |
d340121e | 825 | struct pblk_line *gc_line, u64 paddr); |
a4bd217b JG |
826 | void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas, |
827 | u64 *lba_list, int nr_secs); | |
828 | void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas, | |
829 | sector_t blba, int nr_secs); | |
830 | ||
831 | /* | |
832 | * pblk user I/O write path | |
833 | */ | |
834 | int pblk_write_to_cache(struct pblk *pblk, struct bio *bio, | |
835 | unsigned long flags); | |
d340121e | 836 | int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq); |
a4bd217b JG |
837 | |
838 | /* | |
839 | * pblk map | |
840 | */ | |
841 | void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd, | |
842 | unsigned int sentry, unsigned long *lun_bitmap, | |
843 | unsigned int valid_secs, struct ppa_addr *erase_ppa); | |
844 | void pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry, | |
845 | unsigned long *lun_bitmap, unsigned int valid_secs, | |
846 | unsigned int off); | |
847 | ||
848 | /* | |
849 | * pblk write thread | |
850 | */ | |
851 | int pblk_write_ts(void *data); | |
87c1d2d3 | 852 | void pblk_write_timer_fn(struct timer_list *t); |
a4bd217b | 853 | void pblk_write_should_kick(struct pblk *pblk); |
cc9c9a00 | 854 | void pblk_write_kick(struct pblk *pblk); |
a4bd217b JG |
855 | |
856 | /* | |
857 | * pblk read path | |
858 | */ | |
b906bbb6 | 859 | extern struct bio_set pblk_bio_set; |
a4bd217b | 860 | int pblk_submit_read(struct pblk *pblk, struct bio *bio); |
d340121e | 861 | int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq); |
a4bd217b JG |
862 | /* |
863 | * pblk recovery | |
864 | */ | |
a4bd217b | 865 | struct pblk_line *pblk_recov_l2p(struct pblk *pblk); |
588726d3 | 866 | int pblk_recov_pad(struct pblk *pblk); |
06bc072b | 867 | int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta); |
a4bd217b JG |
868 | |
869 | /* | |
870 | * pblk gc | |
871 | */ | |
b20ba1bc | 872 | #define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */ |
3627896a | 873 | #define PBLK_GC_RQ_QD 128 /* Queue depth for inflight GC requests */ |
b20ba1bc JG |
874 | #define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */ |
875 | #define PBLK_GC_RSV_LINE 1 /* Reserved lines for GC */ | |
a4bd217b JG |
876 | |
877 | int pblk_gc_init(struct pblk *pblk); | |
a7c9e910 | 878 | void pblk_gc_exit(struct pblk *pblk, bool graceful); |
a4bd217b JG |
879 | void pblk_gc_should_start(struct pblk *pblk); |
880 | void pblk_gc_should_stop(struct pblk *pblk); | |
03661b5f | 881 | void pblk_gc_should_kick(struct pblk *pblk); |
37ce33d5 | 882 | void pblk_gc_free_full_lines(struct pblk *pblk); |
a4bd217b JG |
883 | void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled, |
884 | int *gc_active); | |
b20ba1bc | 885 | int pblk_gc_sysfs_force(struct pblk *pblk, int force); |
a4bd217b JG |
886 | |
887 | /* | |
888 | * pblk rate limiter | |
889 | */ | |
890 | void pblk_rl_init(struct pblk_rl *rl, int budget); | |
891 | void pblk_rl_free(struct pblk_rl *rl); | |
03661b5f | 892 | void pblk_rl_update_rates(struct pblk_rl *rl); |
b20ba1bc | 893 | int pblk_rl_high_thrs(struct pblk_rl *rl); |
a4bd217b | 894 | unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl); |
a7689938 | 895 | unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl); |
a4bd217b | 896 | int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries); |
588726d3 | 897 | void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries); |
a4bd217b JG |
898 | void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries); |
899 | int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries); | |
900 | void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries); | |
901 | void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc); | |
da67e68f | 902 | int pblk_rl_max_io(struct pblk_rl *rl); |
a4bd217b | 903 | void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line); |
a7689938 JG |
904 | void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line, |
905 | bool used); | |
588726d3 | 906 | int pblk_rl_is_limit(struct pblk_rl *rl); |
a4bd217b | 907 | |
48b8d208 HH |
908 | void pblk_rl_werr_line_in(struct pblk_rl *rl); |
909 | void pblk_rl_werr_line_out(struct pblk_rl *rl); | |
910 | ||
a4bd217b JG |
911 | /* |
912 | * pblk sysfs | |
913 | */ | |
914 | int pblk_sysfs_init(struct gendisk *tdisk); | |
915 | void pblk_sysfs_exit(struct gendisk *tdisk); | |
916 | ||
917 | static inline void *pblk_malloc(size_t size, int type, gfp_t flags) | |
918 | { | |
919 | if (type == PBLK_KMALLOC_META) | |
920 | return kmalloc(size, flags); | |
921 | return vmalloc(size); | |
922 | } | |
923 | ||
924 | static inline void pblk_mfree(void *ptr, int type) | |
925 | { | |
926 | if (type == PBLK_KMALLOC_META) | |
927 | kfree(ptr); | |
928 | else | |
929 | vfree(ptr); | |
930 | } | |
931 | ||
932 | static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx) | |
933 | { | |
934 | return c_ctx - sizeof(struct nvm_rq); | |
935 | } | |
936 | ||
dd2a4343 JG |
937 | static inline void *emeta_to_bb(struct line_emeta *emeta) |
938 | { | |
939 | return emeta->bb_bitmap; | |
940 | } | |
941 | ||
76758390 HH |
942 | static inline void *emeta_to_wa(struct pblk_line_meta *lm, |
943 | struct line_emeta *emeta) | |
944 | { | |
945 | return emeta->bb_bitmap + lm->blk_bitmap_len; | |
946 | } | |
947 | ||
dd2a4343 JG |
948 | static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta) |
949 | { | |
950 | return ((void *)emeta + pblk->lm.emeta_len[1]); | |
951 | } | |
952 | ||
953 | static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta) | |
a4bd217b | 954 | { |
dd2a4343 | 955 | return (emeta_to_lbas(pblk, emeta) + pblk->lm.emeta_len[2]); |
a4bd217b JG |
956 | } |
957 | ||
b20ba1bc JG |
958 | static inline int pblk_line_vsc(struct pblk_line *line) |
959 | { | |
d340121e | 960 | return le32_to_cpu(*line->vsc); |
b20ba1bc JG |
961 | } |
962 | ||
a4bd217b JG |
963 | static inline int pblk_pad_distance(struct pblk *pblk) |
964 | { | |
965 | struct nvm_tgt_dev *dev = pblk->dev; | |
966 | struct nvm_geo *geo = &dev->geo; | |
967 | ||
e46f4e48 | 968 | return geo->mw_cunits * geo->all_luns * geo->ws_opt; |
a4bd217b JG |
969 | } |
970 | ||
b1bcfda1 | 971 | static inline int pblk_ppa_to_line(struct ppa_addr p) |
a4bd217b | 972 | { |
69471513 | 973 | return p.a.blk; |
a4bd217b JG |
974 | } |
975 | ||
b1bcfda1 | 976 | static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p) |
a4bd217b | 977 | { |
69471513 | 978 | return p.a.lun * geo->num_ch + p.a.ch; |
a4bd217b JG |
979 | } |
980 | ||
b1bcfda1 JG |
981 | static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr, |
982 | u64 line_id) | |
a4bd217b | 983 | { |
3b2a3ad1 JG |
984 | struct nvm_tgt_dev *dev = pblk->dev; |
985 | struct nvm_geo *geo = &dev->geo; | |
b1bcfda1 JG |
986 | struct ppa_addr ppa; |
987 | ||
3b2a3ad1 JG |
988 | if (geo->version == NVM_OCSSD_SPEC_12) { |
989 | struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf; | |
990 | ||
991 | ppa.ppa = 0; | |
992 | ppa.g.blk = line_id; | |
993 | ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset; | |
994 | ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset; | |
995 | ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset; | |
996 | ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset; | |
997 | ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sec_offset; | |
998 | } else { | |
999 | struct pblk_addrf *uaddrf = &pblk->uaddrf; | |
1000 | int secs, chnls, luns; | |
1001 | ||
1002 | ppa.ppa = 0; | |
1003 | ||
1004 | ppa.m.chk = line_id; | |
1005 | ||
1006 | paddr = div_u64_rem(paddr, uaddrf->sec_stripe, &secs); | |
1007 | ppa.m.sec = secs; | |
1008 | ||
1009 | paddr = div_u64_rem(paddr, uaddrf->ch_stripe, &chnls); | |
1010 | ppa.m.grp = chnls; | |
1011 | ||
1012 | paddr = div_u64_rem(paddr, uaddrf->lun_stripe, &luns); | |
1013 | ppa.m.pu = luns; | |
1014 | ||
1015 | ppa.m.sec += uaddrf->sec_stripe * paddr; | |
1016 | } | |
b1bcfda1 JG |
1017 | |
1018 | return ppa; | |
a4bd217b JG |
1019 | } |
1020 | ||
b1bcfda1 JG |
1021 | static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk, |
1022 | struct ppa_addr p) | |
a4bd217b | 1023 | { |
3b2a3ad1 JG |
1024 | struct nvm_tgt_dev *dev = pblk->dev; |
1025 | struct nvm_geo *geo = &dev->geo; | |
b1bcfda1 JG |
1026 | u64 paddr; |
1027 | ||
3b2a3ad1 JG |
1028 | if (geo->version == NVM_OCSSD_SPEC_12) { |
1029 | struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf; | |
1030 | ||
1031 | paddr = (u64)p.g.ch << ppaf->ch_offset; | |
1032 | paddr |= (u64)p.g.lun << ppaf->lun_offset; | |
1033 | paddr |= (u64)p.g.pg << ppaf->pg_offset; | |
1034 | paddr |= (u64)p.g.pl << ppaf->pln_offset; | |
1035 | paddr |= (u64)p.g.sec << ppaf->sec_offset; | |
1036 | } else { | |
1037 | struct pblk_addrf *uaddrf = &pblk->uaddrf; | |
1038 | u64 secs = p.m.sec; | |
1039 | int sec_stripe; | |
1040 | ||
1041 | paddr = (u64)p.m.grp * uaddrf->sec_stripe; | |
1042 | paddr += (u64)p.m.pu * uaddrf->sec_lun_stripe; | |
1043 | ||
1044 | secs = div_u64_rem(secs, uaddrf->sec_stripe, &sec_stripe); | |
1045 | paddr += secs * uaddrf->sec_ws_stripe; | |
1046 | paddr += sec_stripe; | |
1047 | } | |
b1bcfda1 JG |
1048 | |
1049 | return paddr; | |
a4bd217b JG |
1050 | } |
1051 | ||
1052 | static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32) | |
1053 | { | |
1054 | struct ppa_addr ppa64; | |
1055 | ||
1056 | ppa64.ppa = 0; | |
1057 | ||
1058 | if (ppa32 == -1) { | |
1059 | ppa64.ppa = ADDR_EMPTY; | |
1060 | } else if (ppa32 & (1U << 31)) { | |
1061 | ppa64.c.line = ppa32 & ((~0U) >> 1); | |
1062 | ppa64.c.is_cached = 1; | |
1063 | } else { | |
3b2a3ad1 JG |
1064 | struct nvm_tgt_dev *dev = pblk->dev; |
1065 | struct nvm_geo *geo = &dev->geo; | |
1066 | ||
1067 | if (geo->version == NVM_OCSSD_SPEC_12) { | |
1068 | struct nvm_addrf_12 *ppaf = | |
1069 | (struct nvm_addrf_12 *)&pblk->addrf; | |
1070 | ||
1071 | ppa64.g.ch = (ppa32 & ppaf->ch_mask) >> | |
1072 | ppaf->ch_offset; | |
1073 | ppa64.g.lun = (ppa32 & ppaf->lun_mask) >> | |
1074 | ppaf->lun_offset; | |
1075 | ppa64.g.blk = (ppa32 & ppaf->blk_mask) >> | |
1076 | ppaf->blk_offset; | |
1077 | ppa64.g.pg = (ppa32 & ppaf->pg_mask) >> | |
1078 | ppaf->pg_offset; | |
1079 | ppa64.g.pl = (ppa32 & ppaf->pln_mask) >> | |
1080 | ppaf->pln_offset; | |
1081 | ppa64.g.sec = (ppa32 & ppaf->sec_mask) >> | |
1082 | ppaf->sec_offset; | |
1083 | } else { | |
1084 | struct nvm_addrf *lbaf = &pblk->addrf; | |
1085 | ||
1086 | ppa64.m.grp = (ppa32 & lbaf->ch_mask) >> | |
1087 | lbaf->ch_offset; | |
1088 | ppa64.m.pu = (ppa32 & lbaf->lun_mask) >> | |
1089 | lbaf->lun_offset; | |
1090 | ppa64.m.chk = (ppa32 & lbaf->chk_mask) >> | |
1091 | lbaf->chk_offset; | |
1092 | ppa64.m.sec = (ppa32 & lbaf->sec_mask) >> | |
1093 | lbaf->sec_offset; | |
1094 | } | |
a4bd217b JG |
1095 | } |
1096 | ||
1097 | return ppa64; | |
1098 | } | |
1099 | ||
a4bd217b JG |
1100 | static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64) |
1101 | { | |
1102 | u32 ppa32 = 0; | |
1103 | ||
1104 | if (ppa64.ppa == ADDR_EMPTY) { | |
1105 | ppa32 = ~0U; | |
1106 | } else if (ppa64.c.is_cached) { | |
1107 | ppa32 |= ppa64.c.line; | |
1108 | ppa32 |= 1U << 31; | |
1109 | } else { | |
3b2a3ad1 JG |
1110 | struct nvm_tgt_dev *dev = pblk->dev; |
1111 | struct nvm_geo *geo = &dev->geo; | |
1112 | ||
1113 | if (geo->version == NVM_OCSSD_SPEC_12) { | |
1114 | struct nvm_addrf_12 *ppaf = | |
1115 | (struct nvm_addrf_12 *)&pblk->addrf; | |
1116 | ||
1117 | ppa32 |= ppa64.g.ch << ppaf->ch_offset; | |
1118 | ppa32 |= ppa64.g.lun << ppaf->lun_offset; | |
1119 | ppa32 |= ppa64.g.blk << ppaf->blk_offset; | |
1120 | ppa32 |= ppa64.g.pg << ppaf->pg_offset; | |
1121 | ppa32 |= ppa64.g.pl << ppaf->pln_offset; | |
1122 | ppa32 |= ppa64.g.sec << ppaf->sec_offset; | |
1123 | } else { | |
1124 | struct nvm_addrf *lbaf = &pblk->addrf; | |
1125 | ||
1126 | ppa32 |= ppa64.m.grp << lbaf->ch_offset; | |
1127 | ppa32 |= ppa64.m.pu << lbaf->lun_offset; | |
1128 | ppa32 |= ppa64.m.chk << lbaf->chk_offset; | |
1129 | ppa32 |= ppa64.m.sec << lbaf->sec_offset; | |
1130 | } | |
a4bd217b JG |
1131 | } |
1132 | ||
1133 | return ppa32; | |
1134 | } | |
1135 | ||
b1bcfda1 JG |
1136 | static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk, |
1137 | sector_t lba) | |
a4bd217b | 1138 | { |
b1bcfda1 JG |
1139 | struct ppa_addr ppa; |
1140 | ||
bb845ae4 | 1141 | if (pblk->addrf_len < 32) { |
a4bd217b JG |
1142 | u32 *map = (u32 *)pblk->trans_map; |
1143 | ||
b1bcfda1 | 1144 | ppa = pblk_ppa32_to_ppa64(pblk, map[lba]); |
a4bd217b | 1145 | } else { |
b1bcfda1 | 1146 | struct ppa_addr *map = (struct ppa_addr *)pblk->trans_map; |
a4bd217b | 1147 | |
b1bcfda1 | 1148 | ppa = map[lba]; |
a4bd217b | 1149 | } |
b1bcfda1 JG |
1150 | |
1151 | return ppa; | |
a4bd217b JG |
1152 | } |
1153 | ||
b1bcfda1 JG |
1154 | static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba, |
1155 | struct ppa_addr ppa) | |
a4bd217b | 1156 | { |
bb845ae4 | 1157 | if (pblk->addrf_len < 32) { |
b1bcfda1 | 1158 | u32 *map = (u32 *)pblk->trans_map; |
a4bd217b | 1159 | |
b1bcfda1 JG |
1160 | map[lba] = pblk_ppa64_to_ppa32(pblk, ppa); |
1161 | } else { | |
1162 | u64 *map = (u64 *)pblk->trans_map; | |
a4bd217b | 1163 | |
b1bcfda1 JG |
1164 | map[lba] = ppa.ppa; |
1165 | } | |
a4bd217b JG |
1166 | } |
1167 | ||
1168 | static inline int pblk_ppa_empty(struct ppa_addr ppa_addr) | |
1169 | { | |
1170 | return (ppa_addr.ppa == ADDR_EMPTY); | |
1171 | } | |
1172 | ||
1173 | static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr) | |
1174 | { | |
1175 | ppa_addr->ppa = ADDR_EMPTY; | |
1176 | } | |
1177 | ||
07698466 JG |
1178 | static inline bool pblk_ppa_comp(struct ppa_addr lppa, struct ppa_addr rppa) |
1179 | { | |
8b7bc849 | 1180 | return (lppa.ppa == rppa.ppa); |
07698466 JG |
1181 | } |
1182 | ||
a4bd217b JG |
1183 | static inline int pblk_addr_in_cache(struct ppa_addr ppa) |
1184 | { | |
1185 | return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached); | |
1186 | } | |
1187 | ||
1188 | static inline int pblk_addr_to_cacheline(struct ppa_addr ppa) | |
1189 | { | |
1190 | return ppa.c.line; | |
1191 | } | |
1192 | ||
1193 | static inline struct ppa_addr pblk_cacheline_to_addr(int addr) | |
1194 | { | |
1195 | struct ppa_addr p; | |
1196 | ||
1197 | p.c.line = addr; | |
1198 | p.c.is_cached = 1; | |
1199 | ||
1200 | return p; | |
1201 | } | |
1202 | ||
a4bd217b | 1203 | static inline u32 pblk_calc_meta_header_crc(struct pblk *pblk, |
dd2a4343 | 1204 | struct line_header *header) |
a4bd217b JG |
1205 | { |
1206 | u32 crc = ~(u32)0; | |
1207 | ||
dd2a4343 | 1208 | crc = crc32_le(crc, (unsigned char *)header + sizeof(crc), |
a4bd217b JG |
1209 | sizeof(struct line_header) - sizeof(crc)); |
1210 | ||
1211 | return crc; | |
1212 | } | |
1213 | ||
1214 | static inline u32 pblk_calc_smeta_crc(struct pblk *pblk, | |
1215 | struct line_smeta *smeta) | |
1216 | { | |
1217 | struct pblk_line_meta *lm = &pblk->lm; | |
1218 | u32 crc = ~(u32)0; | |
1219 | ||
1220 | crc = crc32_le(crc, (unsigned char *)smeta + | |
1221 | sizeof(struct line_header) + sizeof(crc), | |
1222 | lm->smeta_len - | |
1223 | sizeof(struct line_header) - sizeof(crc)); | |
1224 | ||
1225 | return crc; | |
1226 | } | |
1227 | ||
1228 | static inline u32 pblk_calc_emeta_crc(struct pblk *pblk, | |
1229 | struct line_emeta *emeta) | |
1230 | { | |
1231 | struct pblk_line_meta *lm = &pblk->lm; | |
1232 | u32 crc = ~(u32)0; | |
1233 | ||
1234 | crc = crc32_le(crc, (unsigned char *)emeta + | |
1235 | sizeof(struct line_header) + sizeof(crc), | |
dd2a4343 | 1236 | lm->emeta_len[0] - |
a4bd217b JG |
1237 | sizeof(struct line_header) - sizeof(crc)); |
1238 | ||
1239 | return crc; | |
1240 | } | |
1241 | ||
1242 | static inline int pblk_set_progr_mode(struct pblk *pblk, int type) | |
1243 | { | |
1244 | struct nvm_tgt_dev *dev = pblk->dev; | |
1245 | struct nvm_geo *geo = &dev->geo; | |
1246 | int flags; | |
1247 | ||
3b2a3ad1 JG |
1248 | if (geo->version == NVM_OCSSD_SPEC_20) |
1249 | return 0; | |
1250 | ||
a40afad9 | 1251 | flags = geo->pln_mode >> 1; |
a4bd217b | 1252 | |
e2cddf20 | 1253 | if (type == PBLK_WRITE) |
a4bd217b JG |
1254 | flags |= NVM_IO_SCRAMBLE_ENABLE; |
1255 | ||
1256 | return flags; | |
1257 | } | |
1258 | ||
f9c10152 JG |
1259 | enum { |
1260 | PBLK_READ_RANDOM = 0, | |
1261 | PBLK_READ_SEQUENTIAL = 1, | |
1262 | }; | |
1263 | ||
1264 | static inline int pblk_set_read_mode(struct pblk *pblk, int type) | |
1265 | { | |
1266 | struct nvm_tgt_dev *dev = pblk->dev; | |
1267 | struct nvm_geo *geo = &dev->geo; | |
1268 | int flags; | |
1269 | ||
3b2a3ad1 JG |
1270 | if (geo->version == NVM_OCSSD_SPEC_20) |
1271 | return 0; | |
1272 | ||
f9c10152 JG |
1273 | flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE; |
1274 | if (type == PBLK_READ_SEQUENTIAL) | |
a40afad9 | 1275 | flags |= geo->pln_mode >> 1; |
f9c10152 JG |
1276 | |
1277 | return flags; | |
1278 | } | |
1279 | ||
1280 | static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs) | |
a4bd217b | 1281 | { |
f9c10152 | 1282 | return !(nr_secs % pblk->min_write_pgs); |
a4bd217b JG |
1283 | } |
1284 | ||
1285 | #ifdef CONFIG_NVM_DEBUG | |
3b2a3ad1 JG |
1286 | static inline void print_ppa(struct nvm_geo *geo, struct ppa_addr *p, |
1287 | char *msg, int error) | |
a4bd217b JG |
1288 | { |
1289 | if (p->c.is_cached) { | |
1290 | pr_err("ppa: (%s: %x) cache line: %llu\n", | |
1291 | msg, error, (u64)p->c.line); | |
3b2a3ad1 | 1292 | } else if (geo->version == NVM_OCSSD_SPEC_12) { |
a4bd217b JG |
1293 | pr_err("ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n", |
1294 | msg, error, | |
1295 | p->g.ch, p->g.lun, p->g.blk, | |
1296 | p->g.pg, p->g.pl, p->g.sec); | |
3b2a3ad1 JG |
1297 | } else { |
1298 | pr_err("ppa: (%s: %x):ch:%d,lun:%d,chk:%d,sec:%d\n", | |
1299 | msg, error, | |
1300 | p->m.grp, p->m.pu, p->m.chk, p->m.sec); | |
a4bd217b JG |
1301 | } |
1302 | } | |
1303 | ||
1304 | static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd, | |
1305 | int error) | |
1306 | { | |
1307 | int bit = -1; | |
1308 | ||
1309 | if (rqd->nr_ppas == 1) { | |
3b2a3ad1 | 1310 | print_ppa(&pblk->dev->geo, &rqd->ppa_addr, "rqd", error); |
a4bd217b JG |
1311 | return; |
1312 | } | |
1313 | ||
1314 | while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas, | |
1315 | bit + 1)) < rqd->nr_ppas) { | |
3b2a3ad1 | 1316 | print_ppa(&pblk->dev->geo, &rqd->ppa_list[bit], "rqd", error); |
a4bd217b JG |
1317 | } |
1318 | ||
1319 | pr_err("error:%d, ppa_status:%llx\n", error, rqd->ppa_status); | |
1320 | } | |
a4bd217b JG |
1321 | |
1322 | static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev, | |
1323 | struct ppa_addr *ppas, int nr_ppas) | |
1324 | { | |
1325 | struct nvm_geo *geo = &tgt_dev->geo; | |
1326 | struct ppa_addr *ppa; | |
1327 | int i; | |
1328 | ||
1329 | for (i = 0; i < nr_ppas; i++) { | |
1330 | ppa = &ppas[i]; | |
1331 | ||
3b2a3ad1 JG |
1332 | if (geo->version == NVM_OCSSD_SPEC_12) { |
1333 | if (!ppa->c.is_cached && | |
1334 | ppa->g.ch < geo->num_ch && | |
1335 | ppa->g.lun < geo->num_lun && | |
1336 | ppa->g.pl < geo->num_pln && | |
1337 | ppa->g.blk < geo->num_chk && | |
1338 | ppa->g.pg < geo->num_pg && | |
1339 | ppa->g.sec < geo->ws_min) | |
1340 | continue; | |
1341 | } else { | |
1342 | if (!ppa->c.is_cached && | |
1343 | ppa->m.grp < geo->num_ch && | |
1344 | ppa->m.pu < geo->num_lun && | |
1345 | ppa->m.chk < geo->num_chk && | |
1346 | ppa->m.sec < geo->clba) | |
1347 | continue; | |
1348 | } | |
1349 | ||
1350 | print_ppa(geo, ppa, "boundary", i); | |
1a94b2d4 | 1351 | |
a4bd217b JG |
1352 | return 1; |
1353 | } | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1a94b2d4 JG |
1357 | static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd) |
1358 | { | |
1359 | struct nvm_tgt_dev *dev = pblk->dev; | |
1360 | struct ppa_addr *ppa_list; | |
1361 | ||
1362 | ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr; | |
1363 | ||
1364 | if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) { | |
1365 | WARN_ON(1); | |
1366 | return -EINVAL; | |
1367 | } | |
1368 | ||
1369 | if (rqd->opcode == NVM_OP_PWRITE) { | |
1370 | struct pblk_line *line; | |
1371 | struct ppa_addr ppa; | |
1372 | int i; | |
1373 | ||
1374 | for (i = 0; i < rqd->nr_ppas; i++) { | |
1375 | ppa = ppa_list[i]; | |
b1bcfda1 | 1376 | line = &pblk->lines[pblk_ppa_to_line(ppa)]; |
1a94b2d4 JG |
1377 | |
1378 | spin_lock(&line->lock); | |
1379 | if (line->state != PBLK_LINESTATE_OPEN) { | |
1380 | pr_err("pblk: bad ppa: line:%d,state:%d\n", | |
1381 | line->id, line->state); | |
1382 | WARN_ON(1); | |
1383 | spin_unlock(&line->lock); | |
1384 | return -EINVAL; | |
1385 | } | |
1386 | spin_unlock(&line->lock); | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | return 0; | |
1391 | } | |
1392 | #endif | |
1393 | ||
a4bd217b JG |
1394 | static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr) |
1395 | { | |
1396 | struct pblk_line_meta *lm = &pblk->lm; | |
1397 | ||
1398 | if (paddr > lm->sec_per_line) | |
1399 | return 1; | |
1400 | ||
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | static inline unsigned int pblk_get_bi_idx(struct bio *bio) | |
1405 | { | |
1406 | return bio->bi_iter.bi_idx; | |
1407 | } | |
1408 | ||
1409 | static inline sector_t pblk_get_lba(struct bio *bio) | |
1410 | { | |
1411 | return bio->bi_iter.bi_sector / NR_PHY_IN_LOG; | |
1412 | } | |
1413 | ||
1414 | static inline unsigned int pblk_get_secs(struct bio *bio) | |
1415 | { | |
1416 | return bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE; | |
1417 | } | |
1418 | ||
a4bd217b JG |
1419 | static inline void pblk_setup_uuid(struct pblk *pblk) |
1420 | { | |
1421 | uuid_le uuid; | |
1422 | ||
1423 | uuid_le_gen(&uuid); | |
1424 | memcpy(pblk->instance_uuid, uuid.b, 16); | |
1425 | } | |
1426 | #endif /* PBLK_H_ */ |