drivers/lightnvm/pblk-sysfs.c

   1 /*
   2  * Copyright (C) 2016 CNEX Labs
   3  * Initial release: Javier Gonzalez <javier@cnexlabs.com>
   4  *                  Matias Bjorling <matias@cnexlabs.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * Implementation of a physical block-device target for Open-channel SSDs.
  16  *
  17  * pblk-sysfs.c - pblk's sysfs
  18  *
  19  */
  20
  21 #include "pblk.h"
  22
  23 static ssize_t pblk_sysfs_luns_show(struct pblk *pblk, char *page)
  24 {
  25         struct nvm_tgt_dev *dev = pblk->dev;
  26         struct nvm_geo *geo = &dev->geo;
  27         struct pblk_lun *rlun;
  28         ssize_t sz = 0;
  29         int i;
  30
  31         for (i = 0; i < geo->all_luns; i++) {
  32                 int active = 1;
  33
  34                 rlun = &pblk->luns[i];
  35                 if (!down_trylock(&rlun->wr_sem)) {
  36                         active = 0;
  37                         up(&rlun->wr_sem);
  38                 }
  39                 sz += snprintf(page + sz, PAGE_SIZE - sz,
  40                                 "pblk: pos:%d, ch:%d, lun:%d - %d\n",
  41                                         i,
  42                                         rlun->bppa.a.ch,
  43                                         rlun->bppa.a.lun,
  44                                         active);
  45         }
  46
  47         return sz;
  48 }
  49
  50 static ssize_t pblk_sysfs_rate_limiter(struct pblk *pblk, char *page)
  51 {
  52         int free_blocks, free_user_blocks, total_blocks;
  53         int rb_user_max, rb_user_cnt;
  54         int rb_gc_max, rb_gc_cnt, rb_budget, rb_state;
  55
  56         free_blocks = pblk_rl_nr_free_blks(&pblk->rl);
  57         free_user_blocks = pblk_rl_nr_user_free_blks(&pblk->rl);
  58         rb_user_max = pblk->rl.rb_user_max;
  59         rb_user_cnt = atomic_read(&pblk->rl.rb_user_cnt);
  60         rb_gc_max = pblk->rl.rb_gc_max;
  61         rb_gc_cnt = atomic_read(&pblk->rl.rb_gc_cnt);
  62         rb_budget = pblk->rl.rb_budget;
  63         rb_state = pblk->rl.rb_state;
  64
  65         total_blocks = pblk->rl.total_blocks;
  66
  67         return snprintf(page, PAGE_SIZE,
  68                 "u:%u/%u,gc:%u/%u(%u)(stop:<%u,full:>%u,free:%d/%d/%d)-%d\n",
  69                                 rb_user_cnt,
  70                                 rb_user_max,
  71                                 rb_gc_cnt,
  72                                 rb_gc_max,
  73                                 rb_state,
  74                                 rb_budget,
  75                                 pblk->rl.high,
  76                                 free_blocks,
  77                                 free_user_blocks,
  78                                 total_blocks,
  79                                 READ_ONCE(pblk->rl.rb_user_active));
  80 }
  81
  82 static ssize_t pblk_sysfs_gc_state_show(struct pblk *pblk, char *page)
  83 {
  84         int gc_enabled, gc_active;
  85
  86         pblk_gc_sysfs_state_show(pblk, &gc_enabled, &gc_active);
  87         return snprintf(page, PAGE_SIZE, "gc_enabled=%d, gc_active=%d\n",
  88                                         gc_enabled, gc_active);
  89 }
  90
  91 static ssize_t pblk_sysfs_stats(struct pblk *pblk, char *page)
  92 {
  93         ssize_t sz;
  94
  95         sz = snprintf(page, PAGE_SIZE,
  96                         "read_failed=%lu, read_high_ecc=%lu, read_empty=%lu, read_failed_gc=%lu, write_failed=%lu, erase_failed=%lu\n",
  97                         atomic_long_read(&pblk->read_failed),
  98                         atomic_long_read(&pblk->read_high_ecc),
  99                         atomic_long_read(&pblk->read_empty),
 100                         atomic_long_read(&pblk->read_failed_gc),
 101                         atomic_long_read(&pblk->write_failed),
 102                         atomic_long_read(&pblk->erase_failed));
 103
 104         return sz;
 105 }
 106
 107 static ssize_t pblk_sysfs_write_buffer(struct pblk *pblk, char *page)
 108 {
 109         return pblk_rb_sysfs(&pblk->rwb, page);
 110 }
 111
 112 static ssize_t pblk_sysfs_ppaf(struct pblk *pblk, char *page)
 113 {
 114         struct nvm_tgt_dev *dev = pblk->dev;
 115         struct nvm_geo *geo = &dev->geo;
 116         ssize_t sz = 0;
 117
 118         if (geo->version == NVM_OCSSD_SPEC_12) {
 119                 struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf;
 120                 struct nvm_addrf_12 *gppaf = (struct nvm_addrf_12 *)&geo->addrf;
 121
 122                 sz = snprintf(page, PAGE_SIZE,
 123                         "g:(b:%d)blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
 124                         pblk->addrf_len,
 125                         ppaf->blk_offset, ppaf->blk_len,
 126                         ppaf->pg_offset, ppaf->pg_len,
 127                         ppaf->lun_offset, ppaf->lun_len,
 128                         ppaf->ch_offset, ppaf->ch_len,
 129                         ppaf->pln_offset, ppaf->pln_len,
 130                         ppaf->sec_offset, ppaf->sec_len);
 131
 132                 sz += snprintf(page + sz, PAGE_SIZE - sz,
 133                         "d:blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
 134                         gppaf->blk_offset, gppaf->blk_len,
 135                         gppaf->pg_offset, gppaf->pg_len,
 136                         gppaf->lun_offset, gppaf->lun_len,
 137                         gppaf->ch_offset, gppaf->ch_len,
 138                         gppaf->pln_offset, gppaf->pln_len,
 139                         gppaf->sec_offset, gppaf->sec_len);
 140         } else {
 141                 struct nvm_addrf *ppaf = &pblk->addrf;
 142                 struct nvm_addrf *gppaf = &geo->addrf;
 143
 144                 sz = snprintf(page, PAGE_SIZE,
 145                         "pblk:(s:%d)ch:%d/%d,lun:%d/%d,chk:%d/%d/sec:%d/%d\n",
 146                         pblk->addrf_len,
 147                         ppaf->ch_offset, ppaf->ch_len,
 148                         ppaf->lun_offset, ppaf->lun_len,
 149                         ppaf->chk_offset, ppaf->chk_len,
 150                         ppaf->sec_offset, ppaf->sec_len);
 151
 152                 sz += snprintf(page + sz, PAGE_SIZE - sz,
 153                         "device:ch:%d/%d,lun:%d/%d,chk:%d/%d,sec:%d/%d\n",
 154                         gppaf->ch_offset, gppaf->ch_len,
 155                         gppaf->lun_offset, gppaf->lun_len,
 156                         gppaf->chk_offset, gppaf->chk_len,
 157                         gppaf->sec_offset, gppaf->sec_len);
 158         }
 159
 160         return sz;
 161 }
 162
 163 static ssize_t pblk_sysfs_lines(struct pblk *pblk, char *page)
 164 {
 165         struct nvm_tgt_dev *dev = pblk->dev;
 166         struct nvm_geo *geo = &dev->geo;
 167         struct pblk_line_meta *lm = &pblk->lm;
 168         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
 169         struct pblk_line *line;
 170         ssize_t sz = 0;
 171         int nr_free_lines;
 172         int cur_data, cur_log;
 173         int free_line_cnt = 0, closed_line_cnt = 0, emeta_line_cnt = 0;
 174         int d_line_cnt = 0, l_line_cnt = 0;
 175         int gc_full = 0, gc_high = 0, gc_mid = 0, gc_low = 0, gc_empty = 0;
 176         int gc_werr = 0;
 177
 178         int bad = 0, cor = 0;
 179         int msecs = 0, cur_sec = 0, vsc = 0, sec_in_line = 0;
 180         int map_weight = 0, meta_weight = 0;
 181
 182         spin_lock(&l_mg->free_lock);
 183         cur_data = (l_mg->data_line) ? l_mg->data_line->id : -1;
 184         cur_log = (l_mg->log_line) ? l_mg->log_line->id : -1;
 185         nr_free_lines = l_mg->nr_free_lines;
 186
 187         list_for_each_entry(line, &l_mg->free_list, list)
 188                 free_line_cnt++;
 189         spin_unlock(&l_mg->free_lock);
 190
 191         spin_lock(&l_mg->close_lock);
 192         list_for_each_entry(line, &l_mg->emeta_list, list)
 193                 emeta_line_cnt++;
 194         spin_unlock(&l_mg->close_lock);
 195
 196         spin_lock(&l_mg->gc_lock);
 197         list_for_each_entry(line, &l_mg->gc_full_list, list) {
 198                 if (line->type == PBLK_LINETYPE_DATA)
 199                         d_line_cnt++;
 200                 else if (line->type == PBLK_LINETYPE_LOG)
 201                         l_line_cnt++;
 202                 closed_line_cnt++;
 203                 gc_full++;
 204         }
 205
 206         list_for_each_entry(line, &l_mg->gc_high_list, list) {
 207                 if (line->type == PBLK_LINETYPE_DATA)
 208                         d_line_cnt++;
 209                 else if (line->type == PBLK_LINETYPE_LOG)
 210                         l_line_cnt++;
 211                 closed_line_cnt++;
 212                 gc_high++;
 213         }
 214
 215         list_for_each_entry(line, &l_mg->gc_mid_list, list) {
 216                 if (line->type == PBLK_LINETYPE_DATA)
 217                         d_line_cnt++;
 218                 else if (line->type == PBLK_LINETYPE_LOG)
 219                         l_line_cnt++;
 220                 closed_line_cnt++;
 221                 gc_mid++;
 222         }
 223
 224         list_for_each_entry(line, &l_mg->gc_low_list, list) {
 225                 if (line->type == PBLK_LINETYPE_DATA)
 226                         d_line_cnt++;
 227                 else if (line->type == PBLK_LINETYPE_LOG)
 228                         l_line_cnt++;
 229                 closed_line_cnt++;
 230                 gc_low++;
 231         }
 232
 233         list_for_each_entry(line, &l_mg->gc_empty_list, list) {
 234                 if (line->type == PBLK_LINETYPE_DATA)
 235                         d_line_cnt++;
 236                 else if (line->type == PBLK_LINETYPE_LOG)
 237                         l_line_cnt++;
 238                 closed_line_cnt++;
 239                 gc_empty++;
 240         }
 241
 242         list_for_each_entry(line, &l_mg->gc_werr_list, list) {
 243                 if (line->type == PBLK_LINETYPE_DATA)
 244                         d_line_cnt++;
 245                 else if (line->type == PBLK_LINETYPE_LOG)
 246                         l_line_cnt++;
 247                 closed_line_cnt++;
 248                 gc_werr++;
 249         }
 250
 251         list_for_each_entry(line, &l_mg->bad_list, list)
 252                 bad++;
 253         list_for_each_entry(line, &l_mg->corrupt_list, list)
 254                 cor++;
 255         spin_unlock(&l_mg->gc_lock);
 256
 257         spin_lock(&l_mg->free_lock);
 258         if (l_mg->data_line) {
 259                 cur_sec = l_mg->data_line->cur_sec;
 260                 msecs = l_mg->data_line->left_msecs;
 261                 vsc = le32_to_cpu(*l_mg->data_line->vsc);
 262                 sec_in_line = l_mg->data_line->sec_in_line;
 263                 meta_weight = bitmap_weight(&l_mg->meta_bitmap,
 264                                                         PBLK_DATA_LINES);
 265                 map_weight = bitmap_weight(l_mg->data_line->map_bitmap,
 266                                                         lm->sec_per_line);
 267         }
 268         spin_unlock(&l_mg->free_lock);
 269
 270         if (nr_free_lines != free_line_cnt)
 271                 pblk_err(pblk, "corrupted free line list:%d/%d\n",
 272                                                 nr_free_lines, free_line_cnt);
 273
 274         sz = snprintf(page, PAGE_SIZE - sz,
 275                 "line: nluns:%d, nblks:%d, nsecs:%d\n",
 276                 geo->all_luns, lm->blk_per_line, lm->sec_per_line);
 277
 278         sz += snprintf(page + sz, PAGE_SIZE - sz,
 279                 "lines:d:%d,l:%d-f:%d,m:%d/%d,c:%d,b:%d,co:%d(d:%d,l:%d)t:%d\n",
 280                                         cur_data, cur_log,
 281                                         nr_free_lines,
 282                                         emeta_line_cnt, meta_weight,
 283                                         closed_line_cnt,
 284                                         bad, cor,
 285                                         d_line_cnt, l_line_cnt,
 286                                         l_mg->nr_lines);
 287
 288         sz += snprintf(page + sz, PAGE_SIZE - sz,
 289                 "GC: full:%d, high:%d, mid:%d, low:%d, empty:%d, werr: %d, queue:%d\n",
 290                         gc_full, gc_high, gc_mid, gc_low, gc_empty, gc_werr,
 291                         atomic_read(&pblk->gc.read_inflight_gc));
 292
 293         sz += snprintf(page + sz, PAGE_SIZE - sz,
 294                 "data (%d) cur:%d, left:%d, vsc:%d, s:%d, map:%d/%d (%d)\n",
 295                         cur_data, cur_sec, msecs, vsc, sec_in_line,
 296                         map_weight, lm->sec_per_line,
 297                         atomic_read(&pblk->inflight_io));
 298
 299         return sz;
 300 }
 301
 302 static ssize_t pblk_sysfs_lines_info(struct pblk *pblk, char *page)
 303 {
 304         struct nvm_tgt_dev *dev = pblk->dev;
 305         struct nvm_geo *geo = &dev->geo;
 306         struct pblk_line_meta *lm = &pblk->lm;
 307         ssize_t sz = 0;
 308
 309         sz = snprintf(page, PAGE_SIZE - sz,
 310                                 "smeta - len:%d, secs:%d\n",
 311                                         lm->smeta_len, lm->smeta_sec);
 312         sz += snprintf(page + sz, PAGE_SIZE - sz,
 313                                 "emeta - len:%d, sec:%d, bb_start:%d\n",
 314                                         lm->emeta_len[0], lm->emeta_sec[0],
 315                                         lm->emeta_bb);
 316         sz += snprintf(page + sz, PAGE_SIZE - sz,
 317                                 "bitmap lengths: sec:%d, blk:%d, lun:%d\n",
 318                                         lm->sec_bitmap_len,
 319                                         lm->blk_bitmap_len,
 320                                         lm->lun_bitmap_len);
 321         sz += snprintf(page + sz, PAGE_SIZE - sz,
 322                                 "blk_line:%d, sec_line:%d, sec_blk:%d\n",
 323                                         lm->blk_per_line,
 324                                         lm->sec_per_line,
 325                                         geo->clba);
 326
 327         return sz;
 328 }
 329
 330 static ssize_t pblk_sysfs_get_sec_per_write(struct pblk *pblk, char *page)
 331 {
 332         return snprintf(page, PAGE_SIZE, "%d\n", pblk->sec_per_write);
 333 }
 334
 335 static ssize_t pblk_get_write_amp(u64 user, u64 gc, u64 pad,
 336                                   char *page)
 337 {
 338         int sz;
 339
 340
 341         sz = snprintf(page, PAGE_SIZE,
 342                         "user:%lld gc:%lld pad:%lld WA:",
 343                         user, gc, pad);
 344
 345         if (!user) {
 346                 sz += snprintf(page + sz, PAGE_SIZE - sz, "NaN\n");
 347         } else {
 348                 u64 wa_int;
 349                 u32 wa_frac;
 350
 351                 wa_int = (user + gc + pad) * 100000;
 352                 wa_int = div_u64(wa_int, user);
 353                 wa_int = div_u64_rem(wa_int, 100000, &wa_frac);
 354
 355                 sz += snprintf(page + sz, PAGE_SIZE - sz, "%llu.%05u\n",
 356                                                         wa_int, wa_frac);
 357         }
 358
 359         return sz;
 360 }
 361
 362 static ssize_t pblk_sysfs_get_write_amp_mileage(struct pblk *pblk, char *page)
 363 {
 364         return pblk_get_write_amp(atomic64_read(&pblk->user_wa),
 365                 atomic64_read(&pblk->gc_wa), atomic64_read(&pblk->pad_wa),
 366                 page);
 367 }
 368
 369 static ssize_t pblk_sysfs_get_write_amp_trip(struct pblk *pblk, char *page)
 370 {
 371         return pblk_get_write_amp(
 372                 atomic64_read(&pblk->user_wa) - pblk->user_rst_wa,
 373                 atomic64_read(&pblk->gc_wa) - pblk->gc_rst_wa,
 374                 atomic64_read(&pblk->pad_wa) - pblk->pad_rst_wa, page);
 375 }
 376
 377 static long long bucket_percentage(unsigned long long bucket,
 378                                    unsigned long long total)
 379 {
 380         int p = bucket * 100;
 381
 382         p = div_u64(p, total);
 383
 384         return p;
 385 }
 386
 387 static ssize_t pblk_sysfs_get_padding_dist(struct pblk *pblk, char *page)
 388 {
 389         int sz = 0;
 390         unsigned long long total;
 391         unsigned long long total_buckets = 0;
 392         int buckets = pblk->min_write_pgs - 1;
 393         int i;
 394
 395         total = atomic64_read(&pblk->nr_flush) - pblk->nr_flush_rst;
 396         if (!total) {
 397                 for (i = 0; i < (buckets + 1); i++)
 398                         sz += snprintf(page + sz, PAGE_SIZE - sz,
 399                                 "%d:0 ", i);
 400                 sz += snprintf(page + sz, PAGE_SIZE - sz, "\n");
 401
 402                 return sz;
 403         }
 404
 405         for (i = 0; i < buckets; i++)
 406                 total_buckets += atomic64_read(&pblk->pad_dist[i]);
 407
 408         sz += snprintf(page + sz, PAGE_SIZE - sz, "0:%lld%% ",
 409                 bucket_percentage(total - total_buckets, total));
 410
 411         for (i = 0; i < buckets; i++) {
 412                 unsigned long long p;
 413
 414                 p = bucket_percentage(atomic64_read(&pblk->pad_dist[i]),
 415                                           total);
 416                 sz += snprintf(page + sz, PAGE_SIZE - sz, "%d:%lld%% ",
 417                                 i + 1, p);
 418         }
 419         sz += snprintf(page + sz, PAGE_SIZE - sz, "\n");
 420
 421         return sz;
 422 }
 423
 424 #ifdef CONFIG_NVM_PBLK_DEBUG
 425 static ssize_t pblk_sysfs_stats_debug(struct pblk *pblk, char *page)
 426 {
 427         return snprintf(page, PAGE_SIZE,
 428                 "%lu\t%lu\t%ld\t%llu\t%ld\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\n",
 429                         atomic_long_read(&pblk->inflight_writes),
 430                         atomic_long_read(&pblk->inflight_reads),
 431                         atomic_long_read(&pblk->req_writes),
 432                         (u64)atomic64_read(&pblk->nr_flush),
 433                         atomic_long_read(&pblk->padded_writes),
 434                         atomic_long_read(&pblk->padded_wb),
 435                         atomic_long_read(&pblk->sub_writes),
 436                         atomic_long_read(&pblk->sync_writes),
 437                         atomic_long_read(&pblk->recov_writes),
 438                         atomic_long_read(&pblk->recov_gc_writes),
 439                         atomic_long_read(&pblk->recov_gc_reads),
 440                         atomic_long_read(&pblk->cache_reads),
 441                         atomic_long_read(&pblk->sync_reads));
 442 }
 443 #endif
 444
 445 static ssize_t pblk_sysfs_gc_force(struct pblk *pblk, const char *page,
 446                                    size_t len)
 447 {
 448         size_t c_len;
 449         int force;
 450
 451         c_len = strcspn(page, "\n");
 452         if (c_len >= len)
 453                 return -EINVAL;
 454
 455         if (kstrtouint(page, 0, &force))
 456                 return -EINVAL;
 457
 458         pblk_gc_sysfs_force(pblk, force);
 459
 460         return len;
 461 }
 462
 463 static ssize_t pblk_sysfs_set_sec_per_write(struct pblk *pblk,
 464                                              const char *page, size_t len)
 465 {
 466         size_t c_len;
 467         int sec_per_write;
 468
 469         c_len = strcspn(page, "\n");
 470         if (c_len >= len)
 471                 return -EINVAL;
 472
 473         if (kstrtouint(page, 0, &sec_per_write))
 474                 return -EINVAL;
 475
 476         if (sec_per_write < pblk->min_write_pgs
 477                                 || sec_per_write > pblk->max_write_pgs
 478                                 || sec_per_write % pblk->min_write_pgs != 0)
 479                 return -EINVAL;
 480
 481         pblk_set_sec_per_write(pblk, sec_per_write);
 482
 483         return len;
 484 }
 485
 486 static ssize_t pblk_sysfs_set_write_amp_trip(struct pblk *pblk,
 487                         const char *page, size_t len)
 488 {
 489         size_t c_len;
 490         int reset_value;
 491
 492         c_len = strcspn(page, "\n");
 493         if (c_len >= len)
 494                 return -EINVAL;
 495
 496         if (kstrtouint(page, 0, &reset_value))
 497                 return -EINVAL;
 498
 499         if (reset_value !=  0)
 500                 return -EINVAL;
 501
 502         pblk->user_rst_wa = atomic64_read(&pblk->user_wa);
 503         pblk->pad_rst_wa = atomic64_read(&pblk->pad_wa);
 504         pblk->gc_rst_wa = atomic64_read(&pblk->gc_wa);
 505
 506         return len;
 507 }
 508
 509
 510 static ssize_t pblk_sysfs_set_padding_dist(struct pblk *pblk,
 511                         const char *page, size_t len)
 512 {
 513         size_t c_len;
 514         int reset_value;
 515         int buckets = pblk->min_write_pgs - 1;
 516         int i;
 517
 518         c_len = strcspn(page, "\n");
 519         if (c_len >= len)
 520                 return -EINVAL;
 521
 522         if (kstrtouint(page, 0, &reset_value))
 523                 return -EINVAL;
 524
 525         if (reset_value !=  0)
 526                 return -EINVAL;
 527
 528         for (i = 0; i < buckets; i++)
 529                 atomic64_set(&pblk->pad_dist[i], 0);
 530
 531         pblk->nr_flush_rst = atomic64_read(&pblk->nr_flush);
 532
 533         return len;
 534 }
 535
 536 static struct attribute sys_write_luns = {
 537         .name = "write_luns",
 538         .mode = 0444,
 539 };
 540
 541 static struct attribute sys_rate_limiter_attr = {
 542         .name = "rate_limiter",
 543         .mode = 0444,
 544 };
 545
 546 static struct attribute sys_gc_state = {
 547         .name = "gc_state",
 548         .mode = 0444,
 549 };
 550
 551 static struct attribute sys_errors_attr = {
 552         .name = "errors",
 553         .mode = 0444,
 554 };
 555
 556 static struct attribute sys_rb_attr = {
 557         .name = "write_buffer",
 558         .mode = 0444,
 559 };
 560
 561 static struct attribute sys_stats_ppaf_attr = {
 562         .name = "ppa_format",
 563         .mode = 0444,
 564 };
 565
 566 static struct attribute sys_lines_attr = {
 567         .name = "lines",
 568         .mode = 0444,
 569 };
 570
 571 static struct attribute sys_lines_info_attr = {
 572         .name = "lines_info",
 573         .mode = 0444,
 574 };
 575
 576 static struct attribute sys_gc_force = {
 577         .name = "gc_force",
 578         .mode = 0200,
 579 };
 580
 581 static struct attribute sys_max_sec_per_write = {
 582         .name = "max_sec_per_write",
 583         .mode = 0644,
 584 };
 585
 586 static struct attribute sys_write_amp_mileage = {
 587         .name = "write_amp_mileage",
 588         .mode = 0444,
 589 };
 590
 591 static struct attribute sys_write_amp_trip = {
 592         .name = "write_amp_trip",
 593         .mode = 0644,
 594 };
 595
 596 static struct attribute sys_padding_dist = {
 597         .name = "padding_dist",
 598         .mode = 0644,
 599 };
 600
 601 #ifdef CONFIG_NVM_PBLK_DEBUG
 602 static struct attribute sys_stats_debug_attr = {
 603         .name = "stats",
 604         .mode = 0444,
 605 };
 606 #endif
 607
 608 static struct attribute *pblk_attrs[] = {
 609         &sys_write_luns,
 610         &sys_rate_limiter_attr,
 611         &sys_errors_attr,
 612         &sys_gc_state,
 613         &sys_gc_force,
 614         &sys_max_sec_per_write,
 615         &sys_rb_attr,
 616         &sys_stats_ppaf_attr,
 617         &sys_lines_attr,
 618         &sys_lines_info_attr,
 619         &sys_write_amp_mileage,
 620         &sys_write_amp_trip,
 621         &sys_padding_dist,
 622 #ifdef CONFIG_NVM_PBLK_DEBUG
 623         &sys_stats_debug_attr,
 624 #endif
 625         NULL,
 626 };
 627
 628 static ssize_t pblk_sysfs_show(struct kobject *kobj, struct attribute *attr,
 629                                char *buf)
 630 {
 631         struct pblk *pblk = container_of(kobj, struct pblk, kobj);
 632
 633         if (strcmp(attr->name, "rate_limiter") == 0)
 634                 return pblk_sysfs_rate_limiter(pblk, buf);
 635         else if (strcmp(attr->name, "write_luns") == 0)
 636                 return pblk_sysfs_luns_show(pblk, buf);
 637         else if (strcmp(attr->name, "gc_state") == 0)
 638                 return pblk_sysfs_gc_state_show(pblk, buf);
 639         else if (strcmp(attr->name, "errors") == 0)
 640                 return pblk_sysfs_stats(pblk, buf);
 641         else if (strcmp(attr->name, "write_buffer") == 0)
 642                 return pblk_sysfs_write_buffer(pblk, buf);
 643         else if (strcmp(attr->name, "ppa_format") == 0)
 644                 return pblk_sysfs_ppaf(pblk, buf);
 645         else if (strcmp(attr->name, "lines") == 0)
 646                 return pblk_sysfs_lines(pblk, buf);
 647         else if (strcmp(attr->name, "lines_info") == 0)
 648                 return pblk_sysfs_lines_info(pblk, buf);
 649         else if (strcmp(attr->name, "max_sec_per_write") == 0)
 650                 return pblk_sysfs_get_sec_per_write(pblk, buf);
 651         else if (strcmp(attr->name, "write_amp_mileage") == 0)
 652                 return pblk_sysfs_get_write_amp_mileage(pblk, buf);
 653         else if (strcmp(attr->name, "write_amp_trip") == 0)
 654                 return pblk_sysfs_get_write_amp_trip(pblk, buf);
 655         else if (strcmp(attr->name, "padding_dist") == 0)
 656                 return pblk_sysfs_get_padding_dist(pblk, buf);
 657 #ifdef CONFIG_NVM_PBLK_DEBUG
 658         else if (strcmp(attr->name, "stats") == 0)
 659                 return pblk_sysfs_stats_debug(pblk, buf);
 660 #endif
 661         return 0;
 662 }
 663
 664 static ssize_t pblk_sysfs_store(struct kobject *kobj, struct attribute *attr,
 665                                 const char *buf, size_t len)
 666 {
 667         struct pblk *pblk = container_of(kobj, struct pblk, kobj);
 668
 669         if (strcmp(attr->name, "gc_force") == 0)
 670                 return pblk_sysfs_gc_force(pblk, buf, len);
 671         else if (strcmp(attr->name, "max_sec_per_write") == 0)
 672                 return pblk_sysfs_set_sec_per_write(pblk, buf, len);
 673         else if (strcmp(attr->name, "write_amp_trip") == 0)
 674                 return pblk_sysfs_set_write_amp_trip(pblk, buf, len);
 675         else if (strcmp(attr->name, "padding_dist") == 0)
 676                 return pblk_sysfs_set_padding_dist(pblk, buf, len);
 677         return 0;
 678 }
 679
 680 static const struct sysfs_ops pblk_sysfs_ops = {
 681         .show = pblk_sysfs_show,
 682         .store = pblk_sysfs_store,
 683 };
 684
 685 static struct kobj_type pblk_ktype = {
 686         .sysfs_ops      = &pblk_sysfs_ops,
 687         .default_attrs  = pblk_attrs,
 688 };
 689
 690 int pblk_sysfs_init(struct gendisk *tdisk)
 691 {
 692         struct pblk *pblk = tdisk->private_data;
 693         struct device *parent_dev = disk_to_dev(pblk->disk);
 694         int ret;
 695
 696         ret = kobject_init_and_add(&pblk->kobj, &pblk_ktype,
 697                                         kobject_get(&parent_dev->kobj),
 698                                         "%s", "pblk");
 699         if (ret) {
 700                 pblk_err(pblk, "could not register\n");
 701                 return ret;
 702         }
 703
 704         kobject_uevent(&pblk->kobj, KOBJ_ADD);
 705         return 0;
 706 }
 707
 708 void pblk_sysfs_exit(struct gendisk *tdisk)
 709 {
 710         struct pblk *pblk = tdisk->private_data;
 711
 712         kobject_uevent(&pblk->kobj, KOBJ_REMOVE);
 713         kobject_del(&pblk->kobj);
 714         kobject_put(&pblk->kobj);
 715 }