drivers/lightnvm/pblk-core.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  * pblk-core.c - pblk's core functionality
  16  *
  17  */
  18
  19 #include "pblk.h"
  20
  21 static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line,
  22                          struct ppa_addr *ppa)
  23 {
  24         struct nvm_tgt_dev *dev = pblk->dev;
  25         struct nvm_geo *geo = &dev->geo;
  26         int pos = pblk_dev_ppa_to_pos(geo, *ppa);
  27
  28         pr_debug("pblk: erase failed: line:%d, pos:%d\n", line->id, pos);
  29         atomic_long_inc(&pblk->erase_failed);
  30
  31         atomic_dec(&line->blk_in_line);
  32         if (test_and_set_bit(pos, line->blk_bitmap))
  33                 pr_err("pblk: attempted to erase bb: line:%d, pos:%d\n",
  34                                                         line->id, pos);
  35
  36         pblk_line_run_ws(pblk, NULL, ppa, pblk_line_mark_bb, pblk->bb_wq);
  37 }
  38
  39 static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
  40 {
  41         struct pblk_line *line;
  42
  43         line = &pblk->lines[pblk_dev_ppa_to_line(rqd->ppa_addr)];
  44         atomic_dec(&line->left_seblks);
  45
  46         if (rqd->error) {
  47                 struct ppa_addr *ppa;
  48
  49                 ppa = kmalloc(sizeof(struct ppa_addr), GFP_ATOMIC);
  50                 if (!ppa)
  51                         return;
  52
  53                 *ppa = rqd->ppa_addr;
  54                 pblk_mark_bb(pblk, line, ppa);
  55         }
  56
  57         atomic_dec(&pblk->inflight_io);
  58 }
  59
  60 /* Erase completion assumes that only one block is erased at the time */
  61 static void pblk_end_io_erase(struct nvm_rq *rqd)
  62 {
  63         struct pblk *pblk = rqd->private;
  64
  65         __pblk_end_io_erase(pblk, rqd);
  66         mempool_free(rqd, pblk->g_rq_pool);
  67 }
  68
  69 void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
  70                            u64 paddr)
  71 {
  72         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
  73         struct list_head *move_list = NULL;
  74
  75         /* Lines being reclaimed (GC'ed) cannot be invalidated. Before the L2P
  76          * table is modified with reclaimed sectors, a check is done to endure
  77          * that newer updates are not overwritten.
  78          */
  79         spin_lock(&line->lock);
  80         if (line->state == PBLK_LINESTATE_GC ||
  81                                         line->state == PBLK_LINESTATE_FREE) {
  82                 spin_unlock(&line->lock);
  83                 return;
  84         }
  85
  86         if (test_and_set_bit(paddr, line->invalid_bitmap)) {
  87                 WARN_ONCE(1, "pblk: double invalidate\n");
  88                 spin_unlock(&line->lock);
  89                 return;
  90         }
  91         le32_add_cpu(line->vsc, -1);
  92
  93         if (line->state == PBLK_LINESTATE_CLOSED)
  94                 move_list = pblk_line_gc_list(pblk, line);
  95         spin_unlock(&line->lock);
  96
  97         if (move_list) {
  98                 spin_lock(&l_mg->gc_lock);
  99                 spin_lock(&line->lock);
 100                 /* Prevent moving a line that has just been chosen for GC */
 101                 if (line->state == PBLK_LINESTATE_GC ||
 102                                         line->state == PBLK_LINESTATE_FREE) {
 103                         spin_unlock(&line->lock);
 104                         spin_unlock(&l_mg->gc_lock);
 105                         return;
 106                 }
 107                 spin_unlock(&line->lock);
 108
 109                 list_move_tail(&line->list, move_list);
 110                 spin_unlock(&l_mg->gc_lock);
 111         }
 112 }
 113
 114 void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa)
 115 {
 116         struct pblk_line *line;
 117         u64 paddr;
 118         int line_id;
 119
 120 #ifdef CONFIG_NVM_DEBUG
 121         /* Callers must ensure that the ppa points to a device address */
 122         BUG_ON(pblk_addr_in_cache(ppa));
 123         BUG_ON(pblk_ppa_empty(ppa));
 124 #endif
 125
 126         line_id = pblk_tgt_ppa_to_line(ppa);
 127         line = &pblk->lines[line_id];
 128         paddr = pblk_dev_ppa_to_line_addr(pblk, ppa);
 129
 130         __pblk_map_invalidate(pblk, line, paddr);
 131 }
 132
 133 static void pblk_invalidate_range(struct pblk *pblk, sector_t slba,
 134                                   unsigned int nr_secs)
 135 {
 136         sector_t lba;
 137
 138         spin_lock(&pblk->trans_lock);
 139         for (lba = slba; lba < slba + nr_secs; lba++) {
 140                 struct ppa_addr ppa;
 141
 142                 ppa = pblk_trans_map_get(pblk, lba);
 143
 144                 if (!pblk_addr_in_cache(ppa) && !pblk_ppa_empty(ppa))
 145                         pblk_map_invalidate(pblk, ppa);
 146
 147                 pblk_ppa_set_empty(&ppa);
 148                 pblk_trans_map_set(pblk, lba, ppa);
 149         }
 150         spin_unlock(&pblk->trans_lock);
 151 }
 152
 153 struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int rw)
 154 {
 155         mempool_t *pool;
 156         struct nvm_rq *rqd;
 157         int rq_size;
 158
 159         if (rw == WRITE) {
 160                 pool = pblk->w_rq_pool;
 161                 rq_size = pblk_w_rq_size;
 162         } else {
 163                 pool = pblk->g_rq_pool;
 164                 rq_size = pblk_g_rq_size;
 165         }
 166
 167         rqd = mempool_alloc(pool, GFP_KERNEL);
 168         memset(rqd, 0, rq_size);
 169
 170         return rqd;
 171 }
 172
 173 void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int rw)
 174 {
 175         mempool_t *pool;
 176
 177         if (rw == WRITE)
 178                 pool = pblk->w_rq_pool;
 179         else
 180                 pool = pblk->g_rq_pool;
 181
 182         mempool_free(rqd, pool);
 183 }
 184
 185 void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off,
 186                          int nr_pages)
 187 {
 188         struct bio_vec bv;
 189         int i;
 190
 191         WARN_ON(off + nr_pages != bio->bi_vcnt);
 192
 193         for (i = off; i < nr_pages + off; i++) {
 194                 bv = bio->bi_io_vec[i];
 195                 mempool_free(bv.bv_page, pblk->page_bio_pool);
 196         }
 197 }
 198
 199 int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
 200                        int nr_pages)
 201 {
 202         struct request_queue *q = pblk->dev->q;
 203         struct page *page;
 204         int i, ret;
 205
 206         for (i = 0; i < nr_pages; i++) {
 207                 page = mempool_alloc(pblk->page_bio_pool, flags);
 208                 if (!page)
 209                         goto err;
 210
 211                 ret = bio_add_pc_page(q, bio, page, PBLK_EXPOSED_PAGE_SIZE, 0);
 212                 if (ret != PBLK_EXPOSED_PAGE_SIZE) {
 213                         pr_err("pblk: could not add page to bio\n");
 214                         mempool_free(page, pblk->page_bio_pool);
 215                         goto err;
 216                 }
 217         }
 218
 219         return 0;
 220 err:
 221         pblk_bio_free_pages(pblk, bio, 0, i - 1);
 222         return -1;
 223 }
 224
 225 static void pblk_write_kick(struct pblk *pblk)
 226 {
 227         wake_up_process(pblk->writer_ts);
 228         mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(1000));
 229 }
 230
 231 void pblk_write_timer_fn(unsigned long data)
 232 {
 233         struct pblk *pblk = (struct pblk *)data;
 234
 235         /* kick the write thread every tick to flush outstanding data */
 236         pblk_write_kick(pblk);
 237 }
 238
 239 void pblk_write_should_kick(struct pblk *pblk)
 240 {
 241         unsigned int secs_avail = pblk_rb_read_count(&pblk->rwb);
 242
 243         if (secs_avail >= pblk->min_write_pgs)
 244                 pblk_write_kick(pblk);
 245 }
 246
 247 void pblk_end_bio_sync(struct bio *bio)
 248 {
 249         struct completion *waiting = bio->bi_private;
 250
 251         complete(waiting);
 252 }
 253
 254 void pblk_end_io_sync(struct nvm_rq *rqd)
 255 {
 256         struct completion *waiting = rqd->private;
 257
 258         complete(waiting);
 259 }
 260
 261 void pblk_wait_for_meta(struct pblk *pblk)
 262 {
 263         do {
 264                 if (!atomic_read(&pblk->inflight_io))
 265                         break;
 266
 267                 schedule();
 268         } while (1);
 269 }
 270
 271 static void pblk_flush_writer(struct pblk *pblk)
 272 {
 273         pblk_rb_flush(&pblk->rwb);
 274         do {
 275                 if (!pblk_rb_sync_count(&pblk->rwb))
 276                         break;
 277
 278                 pblk_write_kick(pblk);
 279                 schedule();
 280         } while (1);
 281 }
 282
 283 struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line)
 284 {
 285         struct pblk_line_meta *lm = &pblk->lm;
 286         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
 287         struct list_head *move_list = NULL;
 288         int vsc = le32_to_cpu(*line->vsc);
 289
 290         lockdep_assert_held(&line->lock);
 291
 292         if (!vsc) {
 293                 if (line->gc_group != PBLK_LINEGC_FULL) {
 294                         line->gc_group = PBLK_LINEGC_FULL;
 295                         move_list = &l_mg->gc_full_list;
 296                 }
 297         } else if (vsc < lm->high_thrs) {
 298                 if (line->gc_group != PBLK_LINEGC_HIGH) {
 299                         line->gc_group = PBLK_LINEGC_HIGH;
 300                         move_list = &l_mg->gc_high_list;
 301                 }
 302         } else if (vsc < lm->mid_thrs) {
 303                 if (line->gc_group != PBLK_LINEGC_MID) {
 304                         line->gc_group = PBLK_LINEGC_MID;
 305                         move_list = &l_mg->gc_mid_list;
 306                 }
 307         } else if (vsc < line->sec_in_line) {
 308                 if (line->gc_group != PBLK_LINEGC_LOW) {
 309                         line->gc_group = PBLK_LINEGC_LOW;
 310                         move_list = &l_mg->gc_low_list;
 311                 }
 312         } else if (vsc == line->sec_in_line) {
 313                 if (line->gc_group != PBLK_LINEGC_EMPTY) {
 314                         line->gc_group = PBLK_LINEGC_EMPTY;
 315                         move_list = &l_mg->gc_empty_list;
 316                 }
 317         } else {
 318                 line->state = PBLK_LINESTATE_CORRUPT;
 319                 line->gc_group = PBLK_LINEGC_NONE;
 320                 move_list =  &l_mg->corrupt_list;
 321                 pr_err("pblk: corrupted vsc for line %d, vsc:%d (%d/%d/%d)\n",
 322                                                 line->id, vsc,
 323                                                 line->sec_in_line,
 324                                                 lm->high_thrs, lm->mid_thrs);
 325         }
 326
 327         return move_list;
 328 }
 329
 330 void pblk_discard(struct pblk *pblk, struct bio *bio)
 331 {
 332         sector_t slba = pblk_get_lba(bio);
 333         sector_t nr_secs = pblk_get_secs(bio);
 334
 335         pblk_invalidate_range(pblk, slba, nr_secs);
 336 }
 337
 338 struct ppa_addr pblk_get_lba_map(struct pblk *pblk, sector_t lba)
 339 {
 340         struct ppa_addr ppa;
 341
 342         spin_lock(&pblk->trans_lock);
 343         ppa = pblk_trans_map_get(pblk, lba);
 344         spin_unlock(&pblk->trans_lock);
 345
 346         return ppa;
 347 }
 348
 349 void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd)
 350 {
 351         atomic_long_inc(&pblk->write_failed);
 352 #ifdef CONFIG_NVM_DEBUG
 353         pblk_print_failed_rqd(pblk, rqd, rqd->error);
 354 #endif
 355 }
 356
 357 void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd)
 358 {
 359         /* Empty page read is not necessarily an error (e.g., L2P recovery) */
 360         if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) {
 361                 atomic_long_inc(&pblk->read_empty);
 362                 return;
 363         }
 364
 365         switch (rqd->error) {
 366         case NVM_RSP_WARN_HIGHECC:
 367                 atomic_long_inc(&pblk->read_high_ecc);
 368                 break;
 369         case NVM_RSP_ERR_FAILECC:
 370         case NVM_RSP_ERR_FAILCRC:
 371                 atomic_long_inc(&pblk->read_failed);
 372                 break;
 373         default:
 374                 pr_err("pblk: unknown read error:%d\n", rqd->error);
 375         }
 376 #ifdef CONFIG_NVM_DEBUG
 377         pblk_print_failed_rqd(pblk, rqd, rqd->error);
 378 #endif
 379 }
 380
 381 void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write)
 382 {
 383         pblk->sec_per_write = sec_per_write;
 384 }
 385
 386 int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd)
 387 {
 388         struct nvm_tgt_dev *dev = pblk->dev;
 389
 390 #ifdef CONFIG_NVM_DEBUG
 391         struct ppa_addr *ppa_list;
 392
 393         ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
 394         if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
 395                 WARN_ON(1);
 396                 return -EINVAL;
 397         }
 398
 399         if (rqd->opcode == NVM_OP_PWRITE) {
 400                 struct pblk_line *line;
 401                 struct ppa_addr ppa;
 402                 int i;
 403
 404                 for (i = 0; i < rqd->nr_ppas; i++) {
 405                         ppa = ppa_list[i];
 406                         line = &pblk->lines[pblk_dev_ppa_to_line(ppa)];
 407
 408                         spin_lock(&line->lock);
 409                         if (line->state != PBLK_LINESTATE_OPEN) {
 410                                 pr_err("pblk: bad ppa: line:%d,state:%d\n",
 411                                                         line->id, line->state);
 412                                 WARN_ON(1);
 413                                 spin_unlock(&line->lock);
 414                                 return -EINVAL;
 415                         }
 416                         spin_unlock(&line->lock);
 417                 }
 418         }
 419 #endif
 420
 421         atomic_inc(&pblk->inflight_io);
 422
 423         return nvm_submit_io(dev, rqd);
 424 }
 425
 426 struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
 427                               unsigned int nr_secs, unsigned int len,
 428                               int alloc_type, gfp_t gfp_mask)
 429 {
 430         struct nvm_tgt_dev *dev = pblk->dev;
 431         void *kaddr = data;
 432         struct page *page;
 433         struct bio *bio;
 434         int i, ret;
 435
 436         if (alloc_type == PBLK_KMALLOC_META)
 437                 return bio_map_kern(dev->q, kaddr, len, gfp_mask);
 438
 439         bio = bio_kmalloc(gfp_mask, nr_secs);
 440         if (!bio)
 441                 return ERR_PTR(-ENOMEM);
 442
 443         for (i = 0; i < nr_secs; i++) {
 444                 page = vmalloc_to_page(kaddr);
 445                 if (!page) {
 446                         pr_err("pblk: could not map vmalloc bio\n");
 447                         bio_put(bio);
 448                         bio = ERR_PTR(-ENOMEM);
 449                         goto out;
 450                 }
 451
 452                 ret = bio_add_pc_page(dev->q, bio, page, PAGE_SIZE, 0);
 453                 if (ret != PAGE_SIZE) {
 454                         pr_err("pblk: could not add page to bio\n");
 455                         bio_put(bio);
 456                         bio = ERR_PTR(-ENOMEM);
 457                         goto out;
 458                 }
 459
 460                 kaddr += PAGE_SIZE;
 461         }
 462 out:
 463         return bio;
 464 }
 465
 466 int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail,
 467                    unsigned long secs_to_flush)
 468 {
 469         int max = pblk->sec_per_write;
 470         int min = pblk->min_write_pgs;
 471         int secs_to_sync = 0;
 472
 473         if (secs_avail >= max)
 474                 secs_to_sync = max;
 475         else if (secs_avail >= min)
 476                 secs_to_sync = min * (secs_avail / min);
 477         else if (secs_to_flush)
 478                 secs_to_sync = min;
 479
 480         return secs_to_sync;
 481 }
 482
 483 void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
 484 {
 485         u64 addr;
 486         int i;
 487
 488         spin_lock(&line->lock);
 489         addr = find_next_zero_bit(line->map_bitmap,
 490                                         pblk->lm.sec_per_line, line->cur_sec);
 491         line->cur_sec = addr - nr_secs;
 492
 493         for (i = 0; i < nr_secs; i++, line->cur_sec--)
 494                 WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap));
 495         spin_unlock(&line->lock);
 496 }
 497
 498 u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
 499 {
 500         u64 addr;
 501         int i;
 502
 503         lockdep_assert_held(&line->lock);
 504
 505         /* logic error: ppa out-of-bounds. Prevent generating bad address */
 506         if (line->cur_sec + nr_secs > pblk->lm.sec_per_line) {
 507                 WARN(1, "pblk: page allocation out of bounds\n");
 508                 nr_secs = pblk->lm.sec_per_line - line->cur_sec;
 509         }
 510
 511         line->cur_sec = addr = find_next_zero_bit(line->map_bitmap,
 512                                         pblk->lm.sec_per_line, line->cur_sec);
 513         for (i = 0; i < nr_secs; i++, line->cur_sec++)
 514                 WARN_ON(test_and_set_bit(line->cur_sec, line->map_bitmap));
 515
 516         return addr;
 517 }
 518
 519 u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
 520 {
 521         u64 addr;
 522
 523         /* Lock needed in case a write fails and a recovery needs to remap
 524          * failed write buffer entries
 525          */
 526         spin_lock(&line->lock);
 527         addr = __pblk_alloc_page(pblk, line, nr_secs);
 528         line->left_msecs -= nr_secs;
 529         WARN(line->left_msecs < 0, "pblk: page allocation out of bounds\n");
 530         spin_unlock(&line->lock);
 531
 532         return addr;
 533 }
 534
 535 u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line)
 536 {
 537         u64 paddr;
 538
 539         spin_lock(&line->lock);
 540         paddr = find_next_zero_bit(line->map_bitmap,
 541                                         pblk->lm.sec_per_line, line->cur_sec);
 542         spin_unlock(&line->lock);
 543
 544         return paddr;
 545 }
 546
 547 /*
 548  * Submit emeta to one LUN in the raid line at the time to avoid a deadlock when
 549  * taking the per LUN semaphore.
 550  */
 551 static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line,
 552                                      void *emeta_buf, u64 paddr, int dir)
 553 {
 554         struct nvm_tgt_dev *dev = pblk->dev;
 555         struct nvm_geo *geo = &dev->geo;
 556         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
 557         struct pblk_line_meta *lm = &pblk->lm;
 558         void *ppa_list, *meta_list;
 559         struct bio *bio;
 560         struct nvm_rq rqd;
 561         dma_addr_t dma_ppa_list, dma_meta_list;
 562         int min = pblk->min_write_pgs;
 563         int left_ppas = lm->emeta_sec[0];
 564         int id = line->id;
 565         int rq_ppas, rq_len;
 566         int cmd_op, bio_op;
 567         int i, j;
 568         int ret;
 569         DECLARE_COMPLETION_ONSTACK(wait);
 570
 571         if (dir == WRITE) {
 572                 bio_op = REQ_OP_WRITE;
 573                 cmd_op = NVM_OP_PWRITE;
 574         } else if (dir == READ) {
 575                 bio_op = REQ_OP_READ;
 576                 cmd_op = NVM_OP_PREAD;
 577         } else
 578                 return -EINVAL;
 579
 580         meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
 581                                                         &dma_meta_list);
 582         if (!meta_list)
 583                 return -ENOMEM;
 584
 585         ppa_list = meta_list + pblk_dma_meta_size;
 586         dma_ppa_list = dma_meta_list + pblk_dma_meta_size;
 587
 588 next_rq:
 589         memset(&rqd, 0, sizeof(struct nvm_rq));
 590
 591         rq_ppas = pblk_calc_secs(pblk, left_ppas, 0);
 592         rq_len = rq_ppas * geo->sec_size;
 593
 594         bio = pblk_bio_map_addr(pblk, emeta_buf, rq_ppas, rq_len,
 595                                         l_mg->emeta_alloc_type, GFP_KERNEL);
 596         if (IS_ERR(bio)) {
 597                 ret = PTR_ERR(bio);
 598                 goto free_rqd_dma;
 599         }
 600
 601         bio->bi_iter.bi_sector = 0; /* internal bio */
 602         bio_set_op_attrs(bio, bio_op, 0);
 603
 604         rqd.bio = bio;
 605         rqd.meta_list = meta_list;
 606         rqd.ppa_list = ppa_list;
 607         rqd.dma_meta_list = dma_meta_list;
 608         rqd.dma_ppa_list = dma_ppa_list;
 609         rqd.opcode = cmd_op;
 610         rqd.nr_ppas = rq_ppas;
 611         rqd.end_io = pblk_end_io_sync;
 612         rqd.private = &wait;
 613
 614         if (dir == WRITE) {
 615                 struct pblk_sec_meta *meta_list = rqd.meta_list;
 616
 617                 rqd.flags = pblk_set_progr_mode(pblk, WRITE);
 618                 for (i = 0; i < rqd.nr_ppas; ) {
 619                         spin_lock(&line->lock);
 620                         paddr = __pblk_alloc_page(pblk, line, min);
 621                         spin_unlock(&line->lock);
 622                         for (j = 0; j < min; j++, i++, paddr++) {
 623                                 meta_list[i].lba = cpu_to_le64(ADDR_EMPTY);
 624                                 rqd.ppa_list[i] =
 625                                         addr_to_gen_ppa(pblk, paddr, id);
 626                         }
 627                 }
 628         } else {
 629                 for (i = 0; i < rqd.nr_ppas; ) {
 630                         struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, id);
 631                         int pos = pblk_dev_ppa_to_pos(geo, ppa);
 632                         int read_type = PBLK_READ_RANDOM;
 633
 634                         if (pblk_io_aligned(pblk, rq_ppas))
 635                                 read_type = PBLK_READ_SEQUENTIAL;
 636                         rqd.flags = pblk_set_read_mode(pblk, read_type);
 637
 638                         while (test_bit(pos, line->blk_bitmap)) {
 639                                 paddr += min;
 640                                 if (pblk_boundary_paddr_checks(pblk, paddr)) {
 641                                         pr_err("pblk: corrupt emeta line:%d\n",
 642                                                                 line->id);
 643                                         bio_put(bio);
 644                                         ret = -EINTR;
 645                                         goto free_rqd_dma;
 646                                 }
 647
 648                                 ppa = addr_to_gen_ppa(pblk, paddr, id);
 649                                 pos = pblk_dev_ppa_to_pos(geo, ppa);
 650                         }
 651
 652                         if (pblk_boundary_paddr_checks(pblk, paddr + min)) {
 653                                 pr_err("pblk: corrupt emeta line:%d\n",
 654                                                                 line->id);
 655                                 bio_put(bio);
 656                                 ret = -EINTR;
 657                                 goto free_rqd_dma;
 658                         }
 659
 660                         for (j = 0; j < min; j++, i++, paddr++)
 661                                 rqd.ppa_list[i] =
 662                                         addr_to_gen_ppa(pblk, paddr, line->id);
 663                 }
 664         }
 665
 666         ret = pblk_submit_io(pblk, &rqd);
 667         if (ret) {
 668                 pr_err("pblk: emeta I/O submission failed: %d\n", ret);
 669                 bio_put(bio);
 670                 goto free_rqd_dma;
 671         }
 672
 673         if (!wait_for_completion_io_timeout(&wait,
 674                                 msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
 675                 pr_err("pblk: emeta I/O timed out\n");
 676         }
 677         atomic_dec(&pblk->inflight_io);
 678         reinit_completion(&wait);
 679
 680         if (likely(pblk->l_mg.emeta_alloc_type == PBLK_VMALLOC_META))
 681                 bio_put(bio);
 682
 683         if (rqd.error) {
 684                 if (dir == WRITE)
 685                         pblk_log_write_err(pblk, &rqd);
 686                 else
 687                         pblk_log_read_err(pblk, &rqd);
 688         }
 689
 690         emeta_buf += rq_len;
 691         left_ppas -= rq_ppas;
 692         if (left_ppas)
 693                 goto next_rq;
 694 free_rqd_dma:
 695         nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
 696         return ret;
 697 }
 698
 699 u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line)
 700 {
 701         struct nvm_tgt_dev *dev = pblk->dev;
 702         struct nvm_geo *geo = &dev->geo;
 703         struct pblk_line_meta *lm = &pblk->lm;
 704         int bit;
 705
 706         /* This usually only happens on bad lines */
 707         bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
 708         if (bit >= lm->blk_per_line)
 709                 return -1;
 710
 711         return bit * geo->sec_per_pl;
 712 }
 713
 714 static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
 715                                      u64 paddr, int dir)
 716 {
 717         struct nvm_tgt_dev *dev = pblk->dev;
 718         struct pblk_line_meta *lm = &pblk->lm;
 719         struct bio *bio;
 720         struct nvm_rq rqd;
 721         __le64 *lba_list = NULL;
 722         int i, ret;
 723         int cmd_op, bio_op;
 724         int flags;
 725         DECLARE_COMPLETION_ONSTACK(wait);
 726
 727         if (dir == WRITE) {
 728                 bio_op = REQ_OP_WRITE;
 729                 cmd_op = NVM_OP_PWRITE;
 730                 flags = pblk_set_progr_mode(pblk, WRITE);
 731                 lba_list = emeta_to_lbas(pblk, line->emeta->buf);
 732         } else if (dir == READ) {
 733                 bio_op = REQ_OP_READ;
 734                 cmd_op = NVM_OP_PREAD;
 735                 flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
 736         } else
 737                 return -EINVAL;
 738
 739         memset(&rqd, 0, sizeof(struct nvm_rq));
 740
 741         rqd.meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
 742                                                         &rqd.dma_meta_list);
 743         if (!rqd.meta_list)
 744                 return -ENOMEM;
 745
 746         rqd.ppa_list = rqd.meta_list + pblk_dma_meta_size;
 747         rqd.dma_ppa_list = rqd.dma_meta_list + pblk_dma_meta_size;
 748
 749         bio = bio_map_kern(dev->q, line->smeta, lm->smeta_len, GFP_KERNEL);
 750         if (IS_ERR(bio)) {
 751                 ret = PTR_ERR(bio);
 752                 goto free_ppa_list;
 753         }
 754
 755         bio->bi_iter.bi_sector = 0; /* internal bio */
 756         bio_set_op_attrs(bio, bio_op, 0);
 757
 758         rqd.bio = bio;
 759         rqd.opcode = cmd_op;
 760         rqd.flags = flags;
 761         rqd.nr_ppas = lm->smeta_sec;
 762         rqd.end_io = pblk_end_io_sync;
 763         rqd.private = &wait;
 764
 765         for (i = 0; i < lm->smeta_sec; i++, paddr++) {
 766                 struct pblk_sec_meta *meta_list = rqd.meta_list;
 767
 768                 rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
 769
 770                 if (dir == WRITE) {
 771                         __le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
 772
 773                         meta_list[i].lba = lba_list[paddr] = addr_empty;
 774                 }
 775         }
 776
 777         /*
 778          * This I/O is sent by the write thread when a line is replace. Since
 779          * the write thread is the only one sending write and erase commands,
 780          * there is no need to take the LUN semaphore.
 781          */
 782         ret = pblk_submit_io(pblk, &rqd);
 783         if (ret) {
 784                 pr_err("pblk: smeta I/O submission failed: %d\n", ret);
 785                 bio_put(bio);
 786                 goto free_ppa_list;
 787         }
 788
 789         if (!wait_for_completion_io_timeout(&wait,
 790                                 msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
 791                 pr_err("pblk: smeta I/O timed out\n");
 792         }
 793         atomic_dec(&pblk->inflight_io);
 794
 795         if (rqd.error) {
 796                 if (dir == WRITE)
 797                         pblk_log_write_err(pblk, &rqd);
 798                 else
 799                         pblk_log_read_err(pblk, &rqd);
 800         }
 801
 802 free_ppa_list:
 803         nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
 804
 805         return ret;
 806 }
 807
 808 int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line)
 809 {
 810         u64 bpaddr = pblk_line_smeta_start(pblk, line);
 811
 812         return pblk_line_submit_smeta_io(pblk, line, bpaddr, READ);
 813 }
 814
 815 int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line,
 816                          void *emeta_buf)
 817 {
 818         return pblk_line_submit_emeta_io(pblk, line, emeta_buf,
 819                                                 line->emeta_ssec, READ);
 820 }
 821
 822 static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd,
 823                             struct ppa_addr ppa)
 824 {
 825         rqd->opcode = NVM_OP_ERASE;
 826         rqd->ppa_addr = ppa;
 827         rqd->nr_ppas = 1;
 828         rqd->flags = pblk_set_progr_mode(pblk, ERASE);
 829         rqd->bio = NULL;
 830 }
 831
 832 static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa)
 833 {
 834         struct nvm_rq rqd;
 835         int ret = 0;
 836         DECLARE_COMPLETION_ONSTACK(wait);
 837
 838         memset(&rqd, 0, sizeof(struct nvm_rq));
 839
 840         pblk_setup_e_rq(pblk, &rqd, ppa);
 841
 842         rqd.end_io = pblk_end_io_sync;
 843         rqd.private = &wait;
 844
 845         /* The write thread schedules erases so that it minimizes disturbances
 846          * with writes. Thus, there is no need to take the LUN semaphore.
 847          */
 848         ret = pblk_submit_io(pblk, &rqd);
 849         if (ret) {
 850                 struct nvm_tgt_dev *dev = pblk->dev;
 851                 struct nvm_geo *geo = &dev->geo;
 852
 853                 pr_err("pblk: could not sync erase line:%d,blk:%d\n",
 854                                         pblk_dev_ppa_to_line(ppa),
 855                                         pblk_dev_ppa_to_pos(geo, ppa));
 856
 857                 rqd.error = ret;
 858                 goto out;
 859         }
 860
 861         if (!wait_for_completion_io_timeout(&wait,
 862                                 msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
 863                 pr_err("pblk: sync erase timed out\n");
 864         }
 865
 866 out:
 867         rqd.private = pblk;
 868         __pblk_end_io_erase(pblk, &rqd);
 869
 870         return ret;
 871 }
 872
 873 int pblk_line_erase(struct pblk *pblk, struct pblk_line *line)
 874 {
 875         struct pblk_line_meta *lm = &pblk->lm;
 876         struct ppa_addr ppa;
 877         int ret, bit = -1;
 878
 879         /* Erase only good blocks, one at a time */
 880         do {
 881                 spin_lock(&line->lock);
 882                 bit = find_next_zero_bit(line->erase_bitmap, lm->blk_per_line,
 883                                                                 bit + 1);
 884                 if (bit >= lm->blk_per_line) {
 885                         spin_unlock(&line->lock);
 886                         break;
 887                 }
 888
 889                 ppa = pblk->luns[bit].bppa; /* set ch and lun */
 890                 ppa.g.blk = line->id;
 891
 892                 atomic_dec(&line->left_eblks);
 893                 WARN_ON(test_and_set_bit(bit, line->erase_bitmap));
 894                 spin_unlock(&line->lock);
 895
 896                 ret = pblk_blk_erase_sync(pblk, ppa);
 897                 if (ret) {
 898                         pr_err("pblk: failed to erase line %d\n", line->id);
 899                         return ret;
 900                 }
 901         } while (1);
 902
 903         return 0;
 904 }
 905
 906 static void pblk_line_setup_metadata(struct pblk_line *line,
 907                                      struct pblk_line_mgmt *l_mg,
 908                                      struct pblk_line_meta *lm)
 909 {
 910         int meta_line;
 911
 912         lockdep_assert_held(&l_mg->free_lock);
 913
 914 retry_meta:
 915         meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES);
 916         if (meta_line == PBLK_DATA_LINES) {
 917                 spin_unlock(&l_mg->free_lock);
 918                 io_schedule();
 919                 spin_lock(&l_mg->free_lock);
 920                 goto retry_meta;
 921         }
 922
 923         set_bit(meta_line, &l_mg->meta_bitmap);
 924         line->meta_line = meta_line;
 925
 926         line->smeta = l_mg->sline_meta[meta_line];
 927         line->emeta = l_mg->eline_meta[meta_line];
 928
 929         memset(line->smeta, 0, lm->smeta_len);
 930         memset(line->emeta->buf, 0, lm->emeta_len[0]);
 931
 932         line->emeta->mem = 0;
 933         atomic_set(&line->emeta->sync, 0);
 934 }
 935
 936 /* For now lines are always assumed full lines. Thus, smeta former and current
 937  * lun bitmaps are omitted.
 938  */
 939 static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line,
 940                                   struct pblk_line *cur)
 941 {
 942         struct nvm_tgt_dev *dev = pblk->dev;
 943         struct nvm_geo *geo = &dev->geo;
 944         struct pblk_line_meta *lm = &pblk->lm;
 945         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
 946         struct pblk_emeta *emeta = line->emeta;
 947         struct line_emeta *emeta_buf = emeta->buf;
 948         struct line_smeta *smeta_buf = (struct line_smeta *)line->smeta;
 949         int nr_blk_line;
 950
 951         /* After erasing the line, new bad blocks might appear and we risk
 952          * having an invalid line
 953          */
 954         nr_blk_line = lm->blk_per_line -
 955                         bitmap_weight(line->blk_bitmap, lm->blk_per_line);
 956         if (nr_blk_line < lm->min_blk_line) {
 957                 spin_lock(&l_mg->free_lock);
 958                 spin_lock(&line->lock);
 959                 line->state = PBLK_LINESTATE_BAD;
 960                 spin_unlock(&line->lock);
 961
 962                 list_add_tail(&line->list, &l_mg->bad_list);
 963                 spin_unlock(&l_mg->free_lock);
 964
 965                 pr_debug("pblk: line %d is bad\n", line->id);
 966
 967                 return 0;
 968         }
 969
 970         /* Run-time metadata */
 971         line->lun_bitmap = ((void *)(smeta_buf)) + sizeof(struct line_smeta);
 972
 973         /* Mark LUNs allocated in this line (all for now) */
 974         bitmap_set(line->lun_bitmap, 0, lm->lun_bitmap_len);
 975
 976         smeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC);
 977         memcpy(smeta_buf->header.uuid, pblk->instance_uuid, 16);
 978         smeta_buf->header.id = cpu_to_le32(line->id);
 979         smeta_buf->header.type = cpu_to_le16(line->type);
 980         smeta_buf->header.version = cpu_to_le16(1);
 981
 982         /* Start metadata */
 983         smeta_buf->seq_nr = cpu_to_le64(line->seq_nr);
 984         smeta_buf->window_wr_lun = cpu_to_le32(geo->nr_luns);
 985
 986         /* Fill metadata among lines */
 987         if (cur) {
 988                 memcpy(line->lun_bitmap, cur->lun_bitmap, lm->lun_bitmap_len);
 989                 smeta_buf->prev_id = cpu_to_le32(cur->id);
 990                 cur->emeta->buf->next_id = cpu_to_le32(line->id);
 991         } else {
 992                 smeta_buf->prev_id = cpu_to_le32(PBLK_LINE_EMPTY);
 993         }
 994
 995         /* All smeta must be set at this point */
 996         smeta_buf->header.crc = cpu_to_le32(
 997                         pblk_calc_meta_header_crc(pblk, &smeta_buf->header));
 998         smeta_buf->crc = cpu_to_le32(pblk_calc_smeta_crc(pblk, smeta_buf));
 999
1000         /* End metadata */
1001         memcpy(&emeta_buf->header, &smeta_buf->header,
1002                                                 sizeof(struct line_header));
1003         emeta_buf->seq_nr = cpu_to_le64(line->seq_nr);
1004         emeta_buf->nr_lbas = cpu_to_le64(line->sec_in_line);
1005         emeta_buf->nr_valid_lbas = cpu_to_le64(0);
1006         emeta_buf->next_id = cpu_to_le32(PBLK_LINE_EMPTY);
1007         emeta_buf->crc = cpu_to_le32(0);
1008         emeta_buf->prev_id = smeta_buf->prev_id;
1009
1010         return 1;
1011 }
1012
1013 /* For now lines are always assumed full lines. Thus, smeta former and current
1014  * lun bitmaps are omitted.
1015  */
1016 static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
1017                              int init)
1018 {
1019         struct nvm_tgt_dev *dev = pblk->dev;
1020         struct nvm_geo *geo = &dev->geo;
1021         struct pblk_line_meta *lm = &pblk->lm;
1022         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1023         int nr_bb = 0;
1024         u64 off;
1025         int bit = -1;
1026
1027         line->sec_in_line = lm->sec_per_line;
1028
1029         /* Capture bad block information on line mapping bitmaps */
1030         while ((bit = find_next_bit(line->blk_bitmap, lm->blk_per_line,
1031                                         bit + 1)) < lm->blk_per_line) {
1032                 off = bit * geo->sec_per_pl;
1033                 bitmap_shift_left(l_mg->bb_aux, l_mg->bb_template, off,
1034                                                         lm->sec_per_line);
1035                 bitmap_or(line->map_bitmap, line->map_bitmap, l_mg->bb_aux,
1036                                                         lm->sec_per_line);
1037                 line->sec_in_line -= geo->sec_per_blk;
1038                 if (bit >= lm->emeta_bb)
1039                         nr_bb++;
1040         }
1041
1042         /* Mark smeta metadata sectors as bad sectors */
1043         bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
1044         off = bit * geo->sec_per_pl;
1045         bitmap_set(line->map_bitmap, off, lm->smeta_sec);
1046         line->sec_in_line -= lm->smeta_sec;
1047         line->smeta_ssec = off;
1048         line->cur_sec = off + lm->smeta_sec;
1049
1050         if (init && pblk_line_submit_smeta_io(pblk, line, off, WRITE)) {
1051                 pr_debug("pblk: line smeta I/O failed. Retry\n");
1052                 return 1;
1053         }
1054
1055         bitmap_copy(line->invalid_bitmap, line->map_bitmap, lm->sec_per_line);
1056
1057         /* Mark emeta metadata sectors as bad sectors. We need to consider bad
1058          * blocks to make sure that there are enough sectors to store emeta
1059          */
1060         bit = lm->sec_per_line;
1061         off = lm->sec_per_line - lm->emeta_sec[0];
1062         bitmap_set(line->invalid_bitmap, off, lm->emeta_sec[0]);
1063         while (nr_bb) {
1064                 off -= geo->sec_per_pl;
1065                 if (!test_bit(off, line->invalid_bitmap)) {
1066                         bitmap_set(line->invalid_bitmap, off, geo->sec_per_pl);
1067                         nr_bb--;
1068                 }
1069         }
1070
1071         line->sec_in_line -= lm->emeta_sec[0];
1072         line->emeta_ssec = off;
1073         line->nr_valid_lbas = 0;
1074         line->left_msecs = line->sec_in_line;
1075         *line->vsc = cpu_to_le32(line->sec_in_line);
1076
1077         if (lm->sec_per_line - line->sec_in_line !=
1078                 bitmap_weight(line->invalid_bitmap, lm->sec_per_line)) {
1079                 spin_lock(&line->lock);
1080                 line->state = PBLK_LINESTATE_BAD;
1081                 spin_unlock(&line->lock);
1082
1083                 list_add_tail(&line->list, &l_mg->bad_list);
1084                 pr_err("pblk: unexpected line %d is bad\n", line->id);
1085
1086                 return 0;
1087         }
1088
1089         return 1;
1090 }
1091
1092 static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
1093 {
1094         struct pblk_line_meta *lm = &pblk->lm;
1095         int blk_in_line = atomic_read(&line->blk_in_line);
1096
1097         line->map_bitmap = mempool_alloc(pblk->line_meta_pool, GFP_ATOMIC);
1098         if (!line->map_bitmap)
1099                 return -ENOMEM;
1100         memset(line->map_bitmap, 0, lm->sec_bitmap_len);
1101
1102         /* invalid_bitmap is special since it is used when line is closed. No
1103          * need to zeroized; it will be initialized using bb info form
1104          * map_bitmap
1105          */
1106         line->invalid_bitmap = mempool_alloc(pblk->line_meta_pool, GFP_ATOMIC);
1107         if (!line->invalid_bitmap) {
1108                 mempool_free(line->map_bitmap, pblk->line_meta_pool);
1109                 return -ENOMEM;
1110         }
1111
1112         spin_lock(&line->lock);
1113         if (line->state != PBLK_LINESTATE_FREE) {
1114                 mempool_free(line->invalid_bitmap, pblk->line_meta_pool);
1115                 mempool_free(line->map_bitmap, pblk->line_meta_pool);
1116                 spin_unlock(&line->lock);
1117                 WARN(1, "pblk: corrupted line %d, state %d\n",
1118                                                         line->id, line->state);
1119                 return -EAGAIN;
1120         }
1121
1122         line->state = PBLK_LINESTATE_OPEN;
1123
1124         atomic_set(&line->left_eblks, blk_in_line);
1125         atomic_set(&line->left_seblks, blk_in_line);
1126
1127         line->meta_distance = lm->meta_distance;
1128         spin_unlock(&line->lock);
1129
1130         /* Bad blocks do not need to be erased */
1131         bitmap_copy(line->erase_bitmap, line->blk_bitmap, lm->blk_per_line);
1132
1133         kref_init(&line->ref);
1134
1135         return 0;
1136 }
1137
1138 int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line)
1139 {
1140         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1141         int ret;
1142
1143         spin_lock(&l_mg->free_lock);
1144         l_mg->data_line = line;
1145         list_del(&line->list);
1146
1147         ret = pblk_line_prepare(pblk, line);
1148         if (ret) {
1149                 list_add(&line->list, &l_mg->free_list);
1150                 spin_unlock(&l_mg->free_lock);
1151                 return ret;
1152         }
1153         spin_unlock(&l_mg->free_lock);
1154
1155         pblk_rl_free_lines_dec(&pblk->rl, line);
1156
1157         if (!pblk_line_init_bb(pblk, line, 0)) {
1158                 list_add(&line->list, &l_mg->free_list);
1159                 return -EINTR;
1160         }
1161
1162         return 0;
1163 }
1164
1165 void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line)
1166 {
1167         mempool_free(line->map_bitmap, pblk->line_meta_pool);
1168         line->map_bitmap = NULL;
1169         line->smeta = NULL;
1170         line->emeta = NULL;
1171 }
1172
1173 struct pblk_line *pblk_line_get(struct pblk *pblk)
1174 {
1175         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1176         struct pblk_line_meta *lm = &pblk->lm;
1177         struct pblk_line *line;
1178         int ret, bit;
1179
1180         lockdep_assert_held(&l_mg->free_lock);
1181
1182 retry:
1183         if (list_empty(&l_mg->free_list)) {
1184                 pr_err("pblk: no free lines\n");
1185                 return NULL;
1186         }
1187
1188         line = list_first_entry(&l_mg->free_list, struct pblk_line, list);
1189         list_del(&line->list);
1190         l_mg->nr_free_lines--;
1191
1192         bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
1193         if (unlikely(bit >= lm->blk_per_line)) {
1194                 spin_lock(&line->lock);
1195                 line->state = PBLK_LINESTATE_BAD;
1196                 spin_unlock(&line->lock);
1197
1198                 list_add_tail(&line->list, &l_mg->bad_list);
1199
1200                 pr_debug("pblk: line %d is bad\n", line->id);
1201                 goto retry;
1202         }
1203
1204         ret = pblk_line_prepare(pblk, line);
1205         if (ret) {
1206                 if (ret == -EAGAIN) {
1207                         list_add(&line->list, &l_mg->corrupt_list);
1208                         goto retry;
1209                 } else {
1210                         pr_err("pblk: failed to prepare line %d\n", line->id);
1211                         list_add(&line->list, &l_mg->free_list);
1212                         l_mg->nr_free_lines++;
1213                         return NULL;
1214                 }
1215         }
1216
1217         return line;
1218 }
1219
1220 static struct pblk_line *pblk_line_retry(struct pblk *pblk,
1221                                          struct pblk_line *line)
1222 {
1223         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1224         struct pblk_line *retry_line;
1225
1226 retry:
1227         spin_lock(&l_mg->free_lock);
1228         retry_line = pblk_line_get(pblk);
1229         if (!retry_line) {
1230                 l_mg->data_line = NULL;
1231                 spin_unlock(&l_mg->free_lock);
1232                 return NULL;
1233         }
1234
1235         retry_line->smeta = line->smeta;
1236         retry_line->emeta = line->emeta;
1237         retry_line->meta_line = line->meta_line;
1238
1239         pblk_line_free(pblk, line);
1240         l_mg->data_line = retry_line;
1241         spin_unlock(&l_mg->free_lock);
1242
1243         pblk_rl_free_lines_dec(&pblk->rl, retry_line);
1244
1245         if (pblk_line_erase(pblk, retry_line))
1246                 goto retry;
1247
1248         return retry_line;
1249 }
1250
1251 static void pblk_set_space_limit(struct pblk *pblk)
1252 {
1253         struct pblk_rl *rl = &pblk->rl;
1254
1255         atomic_set(&rl->rb_space, 0);
1256 }
1257
1258 struct pblk_line *pblk_line_get_first_data(struct pblk *pblk)
1259 {
1260         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1261         struct pblk_line *line;
1262         int is_next = 0;
1263
1264         spin_lock(&l_mg->free_lock);
1265         line = pblk_line_get(pblk);
1266         if (!line) {
1267                 spin_unlock(&l_mg->free_lock);
1268                 return NULL;
1269         }
1270
1271         line->seq_nr = l_mg->d_seq_nr++;
1272         line->type = PBLK_LINETYPE_DATA;
1273         l_mg->data_line = line;
1274
1275         pblk_line_setup_metadata(line, l_mg, &pblk->lm);
1276
1277         /* Allocate next line for preparation */
1278         l_mg->data_next = pblk_line_get(pblk);
1279         if (!l_mg->data_next) {
1280                 /* If we cannot get a new line, we need to stop the pipeline.
1281                  * Only allow as many writes in as we can store safely and then
1282                  * fail gracefully
1283                  */
1284                 pblk_set_space_limit(pblk);
1285
1286                 l_mg->data_next = NULL;
1287         } else {
1288                 l_mg->data_next->seq_nr = l_mg->d_seq_nr++;
1289                 l_mg->data_next->type = PBLK_LINETYPE_DATA;
1290                 is_next = 1;
1291         }
1292         spin_unlock(&l_mg->free_lock);
1293
1294         if (pblk_line_erase(pblk, line)) {
1295                 line = pblk_line_retry(pblk, line);
1296                 if (!line)
1297                         return NULL;
1298         }
1299
1300         pblk_rl_free_lines_dec(&pblk->rl, line);
1301         if (is_next)
1302                 pblk_rl_free_lines_dec(&pblk->rl, l_mg->data_next);
1303
1304 retry_setup:
1305         if (!pblk_line_init_metadata(pblk, line, NULL)) {
1306                 line = pblk_line_retry(pblk, line);
1307                 if (!line)
1308                         return NULL;
1309
1310                 goto retry_setup;
1311         }
1312
1313         if (!pblk_line_init_bb(pblk, line, 1)) {
1314                 line = pblk_line_retry(pblk, line);
1315                 if (!line)
1316                         return NULL;
1317
1318                 goto retry_setup;
1319         }
1320
1321         return line;
1322 }
1323
1324 static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line)
1325 {
1326         lockdep_assert_held(&pblk->l_mg.free_lock);
1327
1328         pblk_set_space_limit(pblk);
1329         pblk->state = PBLK_STATE_STOPPING;
1330 }
1331
1332 void pblk_pipeline_stop(struct pblk *pblk)
1333 {
1334         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1335         int ret;
1336
1337         spin_lock(&l_mg->free_lock);
1338         if (pblk->state == PBLK_STATE_RECOVERING ||
1339                                         pblk->state == PBLK_STATE_STOPPED) {
1340                 spin_unlock(&l_mg->free_lock);
1341                 return;
1342         }
1343         pblk->state = PBLK_STATE_RECOVERING;
1344         spin_unlock(&l_mg->free_lock);
1345
1346         pblk_flush_writer(pblk);
1347         pblk_wait_for_meta(pblk);
1348
1349         ret = pblk_recov_pad(pblk);
1350         if (ret) {
1351                 pr_err("pblk: could not close data on teardown(%d)\n", ret);
1352                 return;
1353         }
1354
1355         flush_workqueue(pblk->bb_wq);
1356         pblk_line_close_meta_sync(pblk);
1357
1358         spin_lock(&l_mg->free_lock);
1359         pblk->state = PBLK_STATE_STOPPED;
1360         l_mg->data_line = NULL;
1361         l_mg->data_next = NULL;
1362         spin_unlock(&l_mg->free_lock);
1363 }
1364
1365 void pblk_line_replace_data(struct pblk *pblk)
1366 {
1367         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1368         struct pblk_line *cur, *new;
1369         unsigned int left_seblks;
1370         int is_next = 0;
1371
1372         cur = l_mg->data_line;
1373         new = l_mg->data_next;
1374         if (!new)
1375                 return;
1376         l_mg->data_line = new;
1377
1378         spin_lock(&l_mg->free_lock);
1379         if (pblk->state != PBLK_STATE_RUNNING) {
1380                 l_mg->data_line = NULL;
1381                 l_mg->data_next = NULL;
1382                 spin_unlock(&l_mg->free_lock);
1383                 return;
1384         }
1385
1386         pblk_line_setup_metadata(new, l_mg, &pblk->lm);
1387         spin_unlock(&l_mg->free_lock);
1388
1389 retry_erase:
1390         left_seblks = atomic_read(&new->left_seblks);
1391         if (left_seblks) {
1392                 /* If line is not fully erased, erase it */
1393                 if (atomic_read(&new->left_eblks)) {
1394                         if (pblk_line_erase(pblk, new))
1395                                 return;
1396                 } else {
1397                         io_schedule();
1398                 }
1399                 goto retry_erase;
1400         }
1401
1402 retry_setup:
1403         if (!pblk_line_init_metadata(pblk, new, cur)) {
1404                 new = pblk_line_retry(pblk, new);
1405                 if (!new)
1406                         return;
1407
1408                 goto retry_setup;
1409         }
1410
1411         if (!pblk_line_init_bb(pblk, new, 1)) {
1412                 new = pblk_line_retry(pblk, new);
1413                 if (!new)
1414                         return;
1415
1416                 goto retry_setup;
1417         }
1418
1419         /* Allocate next line for preparation */
1420         spin_lock(&l_mg->free_lock);
1421         l_mg->data_next = pblk_line_get(pblk);
1422         if (!l_mg->data_next) {
1423                 /* If we cannot get a new line, we need to stop the pipeline.
1424                  * Only allow as many writes in as we can store safely and then
1425                  * fail gracefully
1426                  */
1427                 pblk_stop_writes(pblk, new);
1428                 l_mg->data_next = NULL;
1429         } else {
1430                 l_mg->data_next->seq_nr = l_mg->d_seq_nr++;
1431                 l_mg->data_next->type = PBLK_LINETYPE_DATA;
1432                 is_next = 1;
1433         }
1434         spin_unlock(&l_mg->free_lock);
1435
1436         if (is_next)
1437                 pblk_rl_free_lines_dec(&pblk->rl, l_mg->data_next);
1438 }
1439
1440 void pblk_line_free(struct pblk *pblk, struct pblk_line *line)
1441 {
1442         if (line->map_bitmap)
1443                 mempool_free(line->map_bitmap, pblk->line_meta_pool);
1444         if (line->invalid_bitmap)
1445                 mempool_free(line->invalid_bitmap, pblk->line_meta_pool);
1446
1447         *line->vsc = cpu_to_le32(EMPTY_ENTRY);
1448
1449         line->map_bitmap = NULL;
1450         line->invalid_bitmap = NULL;
1451         line->smeta = NULL;
1452         line->emeta = NULL;
1453 }
1454
1455 void pblk_line_put(struct kref *ref)
1456 {
1457         struct pblk_line *line = container_of(ref, struct pblk_line, ref);
1458         struct pblk *pblk = line->pblk;
1459         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1460
1461         spin_lock(&line->lock);
1462         WARN_ON(line->state != PBLK_LINESTATE_GC);
1463         line->state = PBLK_LINESTATE_FREE;
1464         line->gc_group = PBLK_LINEGC_NONE;
1465         pblk_line_free(pblk, line);
1466         spin_unlock(&line->lock);
1467
1468         spin_lock(&l_mg->free_lock);
1469         list_add_tail(&line->list, &l_mg->free_list);
1470         l_mg->nr_free_lines++;
1471         spin_unlock(&l_mg->free_lock);
1472
1473         pblk_rl_free_lines_inc(&pblk->rl, line);
1474 }
1475
1476 int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa)
1477 {
1478         struct nvm_rq *rqd;
1479         int err;
1480
1481         rqd = mempool_alloc(pblk->g_rq_pool, GFP_KERNEL);
1482         memset(rqd, 0, pblk_g_rq_size);
1483
1484         pblk_setup_e_rq(pblk, rqd, ppa);
1485
1486         rqd->end_io = pblk_end_io_erase;
1487         rqd->private = pblk;
1488
1489         /* The write thread schedules erases so that it minimizes disturbances
1490          * with writes. Thus, there is no need to take the LUN semaphore.
1491          */
1492         err = pblk_submit_io(pblk, rqd);
1493         if (err) {
1494                 struct nvm_tgt_dev *dev = pblk->dev;
1495                 struct nvm_geo *geo = &dev->geo;
1496
1497                 pr_err("pblk: could not async erase line:%d,blk:%d\n",
1498                                         pblk_dev_ppa_to_line(ppa),
1499                                         pblk_dev_ppa_to_pos(geo, ppa));
1500         }
1501
1502         return err;
1503 }
1504
1505 struct pblk_line *pblk_line_get_data(struct pblk *pblk)
1506 {
1507         return pblk->l_mg.data_line;
1508 }
1509
1510 /* For now, always erase next line */
1511 struct pblk_line *pblk_line_get_erase(struct pblk *pblk)
1512 {
1513         return pblk->l_mg.data_next;
1514 }
1515
1516 int pblk_line_is_full(struct pblk_line *line)
1517 {
1518         return (line->left_msecs == 0);
1519 }
1520
1521 void pblk_line_close_meta_sync(struct pblk *pblk)
1522 {
1523         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1524         struct pblk_line_meta *lm = &pblk->lm;
1525         struct pblk_line *line, *tline;
1526         LIST_HEAD(list);
1527
1528         spin_lock(&l_mg->close_lock);
1529         if (list_empty(&l_mg->emeta_list)) {
1530                 spin_unlock(&l_mg->close_lock);
1531                 return;
1532         }
1533
1534         list_cut_position(&list, &l_mg->emeta_list, l_mg->emeta_list.prev);
1535         spin_unlock(&l_mg->close_lock);
1536
1537         list_for_each_entry_safe(line, tline, &list, list) {
1538                 struct pblk_emeta *emeta = line->emeta;
1539
1540                 while (emeta->mem < lm->emeta_len[0]) {
1541                         int ret;
1542
1543                         ret = pblk_submit_meta_io(pblk, line);
1544                         if (ret) {
1545                                 pr_err("pblk: sync meta line %d failed (%d)\n",
1546                                                         line->id, ret);
1547                                 return;
1548                         }
1549                 }
1550         }
1551
1552         pblk_wait_for_meta(pblk);
1553         flush_workqueue(pblk->close_wq);
1554 }
1555
1556 static void pblk_line_should_sync_meta(struct pblk *pblk)
1557 {
1558         if (pblk_rl_is_limit(&pblk->rl))
1559                 pblk_line_close_meta_sync(pblk);
1560 }
1561
1562 void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
1563 {
1564         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1565         struct list_head *move_list;
1566
1567 #ifdef CONFIG_NVM_DEBUG
1568         struct pblk_line_meta *lm = &pblk->lm;
1569
1570         WARN(!bitmap_full(line->map_bitmap, lm->sec_per_line),
1571                                 "pblk: corrupt closed line %d\n", line->id);
1572 #endif
1573
1574         spin_lock(&l_mg->free_lock);
1575         WARN_ON(!test_and_clear_bit(line->meta_line, &l_mg->meta_bitmap));
1576         spin_unlock(&l_mg->free_lock);
1577
1578         spin_lock(&l_mg->gc_lock);
1579         spin_lock(&line->lock);
1580         WARN_ON(line->state != PBLK_LINESTATE_OPEN);
1581         line->state = PBLK_LINESTATE_CLOSED;
1582         move_list = pblk_line_gc_list(pblk, line);
1583
1584         list_add_tail(&line->list, move_list);
1585
1586         mempool_free(line->map_bitmap, pblk->line_meta_pool);
1587         line->map_bitmap = NULL;
1588         line->smeta = NULL;
1589         line->emeta = NULL;
1590
1591         spin_unlock(&line->lock);
1592         spin_unlock(&l_mg->gc_lock);
1593
1594         pblk_gc_should_kick(pblk);
1595 }
1596
1597 void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
1598 {
1599         struct pblk_line_mgmt *l_mg = &pblk->l_mg;
1600         struct pblk_line_meta *lm = &pblk->lm;
1601         struct pblk_emeta *emeta = line->emeta;
1602         struct line_emeta *emeta_buf = emeta->buf;
1603
1604         /* No need for exact vsc value; avoid a big line lock and take aprox. */
1605         memcpy(emeta_to_vsc(pblk, emeta_buf), l_mg->vsc_list, lm->vsc_list_len);
1606         memcpy(emeta_to_bb(emeta_buf), line->blk_bitmap, lm->blk_bitmap_len);
1607
1608         emeta_buf->nr_valid_lbas = cpu_to_le64(line->nr_valid_lbas);
1609         emeta_buf->crc = cpu_to_le32(pblk_calc_emeta_crc(pblk, emeta_buf));
1610
1611         spin_lock(&l_mg->close_lock);
1612         spin_lock(&line->lock);
1613         list_add_tail(&line->list, &l_mg->emeta_list);
1614         spin_unlock(&line->lock);
1615         spin_unlock(&l_mg->close_lock);
1616
1617         pblk_line_should_sync_meta(pblk);
1618 }
1619
1620 void pblk_line_close_ws(struct work_struct *work)
1621 {
1622         struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
1623                                                                         ws);
1624         struct pblk *pblk = line_ws->pblk;
1625         struct pblk_line *line = line_ws->line;
1626
1627         pblk_line_close(pblk, line);
1628         mempool_free(line_ws, pblk->line_ws_pool);
1629 }
1630
1631 void pblk_line_mark_bb(struct work_struct *work)
1632 {
1633         struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
1634                                                                         ws);
1635         struct pblk *pblk = line_ws->pblk;
1636         struct nvm_tgt_dev *dev = pblk->dev;
1637         struct ppa_addr *ppa = line_ws->priv;
1638         int ret;
1639
1640         ret = nvm_set_tgt_bb_tbl(dev, ppa, 1, NVM_BLK_T_GRWN_BAD);
1641         if (ret) {
1642                 struct pblk_line *line;
1643                 int pos;
1644
1645                 line = &pblk->lines[pblk_dev_ppa_to_line(*ppa)];
1646                 pos = pblk_dev_ppa_to_pos(&dev->geo, *ppa);
1647
1648                 pr_err("pblk: failed to mark bb, line:%d, pos:%d\n",
1649                                 line->id, pos);
1650         }
1651
1652         kfree(ppa);
1653         mempool_free(line_ws, pblk->line_ws_pool);
1654 }
1655
1656 void pblk_line_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
1657                       void (*work)(struct work_struct *),
1658                       struct workqueue_struct *wq)
1659 {
1660         struct pblk_line_ws *line_ws;
1661
1662         line_ws = mempool_alloc(pblk->line_ws_pool, GFP_ATOMIC);
1663         if (!line_ws)
1664                 return;
1665
1666         line_ws->pblk = pblk;
1667         line_ws->line = line;
1668         line_ws->priv = priv;
1669
1670         INIT_WORK(&line_ws->ws, work);
1671         queue_work(wq, &line_ws->ws);
1672 }
1673
1674 static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list,
1675                              int nr_ppas, int pos)
1676 {
1677         struct pblk_lun *rlun = &pblk->luns[pos];
1678         int ret;
1679
1680         /*
1681          * Only send one inflight I/O per LUN. Since we map at a page
1682          * granurality, all ppas in the I/O will map to the same LUN
1683          */
1684 #ifdef CONFIG_NVM_DEBUG
1685         int i;
1686
1687         for (i = 1; i < nr_ppas; i++)
1688                 WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun ||
1689                                 ppa_list[0].g.ch != ppa_list[i].g.ch);
1690 #endif
1691
1692         ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000));
1693         if (ret) {
1694                 switch (ret) {
1695                 case -ETIME:
1696                         pr_err("pblk: lun semaphore timed out\n");
1697                         break;
1698                 case -EINTR:
1699                         pr_err("pblk: lun semaphore timed out\n");
1700                         break;
1701                 }
1702         }
1703 }
1704
1705 void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas)
1706 {
1707         struct nvm_tgt_dev *dev = pblk->dev;
1708         struct nvm_geo *geo = &dev->geo;
1709         int pos = pblk_ppa_to_pos(geo, ppa_list[0]);
1710
1711         __pblk_down_page(pblk, ppa_list, nr_ppas, pos);
1712 }
1713
1714 void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
1715                   unsigned long *lun_bitmap)
1716 {
1717         struct nvm_tgt_dev *dev = pblk->dev;
1718         struct nvm_geo *geo = &dev->geo;
1719         int pos = pblk_ppa_to_pos(geo, ppa_list[0]);
1720
1721         /* If the LUN has been locked for this same request, do no attempt to
1722          * lock it again
1723          */
1724         if (test_and_set_bit(pos, lun_bitmap))
1725                 return;
1726
1727         __pblk_down_page(pblk, ppa_list, nr_ppas, pos);
1728 }
1729
1730 void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas)
1731 {
1732         struct nvm_tgt_dev *dev = pblk->dev;
1733         struct nvm_geo *geo = &dev->geo;
1734         struct pblk_lun *rlun;
1735         int pos = pblk_ppa_to_pos(geo, ppa_list[0]);
1736
1737 #ifdef CONFIG_NVM_DEBUG
1738         int i;
1739
1740         for (i = 1; i < nr_ppas; i++)
1741                 WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun ||
1742                                 ppa_list[0].g.ch != ppa_list[i].g.ch);
1743 #endif
1744
1745         rlun = &pblk->luns[pos];
1746         up(&rlun->wr_sem);
1747 }
1748
1749 void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
1750                 unsigned long *lun_bitmap)
1751 {
1752         struct nvm_tgt_dev *dev = pblk->dev;
1753         struct nvm_geo *geo = &dev->geo;
1754         struct pblk_lun *rlun;
1755         int nr_luns = geo->nr_luns;
1756         int bit = -1;
1757
1758         while ((bit = find_next_bit(lun_bitmap, nr_luns, bit + 1)) < nr_luns) {
1759                 rlun = &pblk->luns[bit];
1760                 up(&rlun->wr_sem);
1761         }
1762
1763         kfree(lun_bitmap);
1764 }
1765
1766 void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
1767 {
1768         struct ppa_addr l2p_ppa;
1769
1770         /* logic error: lba out-of-bounds. Ignore update */
1771         if (!(lba < pblk->rl.nr_secs)) {
1772                 WARN(1, "pblk: corrupted L2P map request\n");
1773                 return;
1774         }
1775
1776         spin_lock(&pblk->trans_lock);
1777         l2p_ppa = pblk_trans_map_get(pblk, lba);
1778
1779         if (!pblk_addr_in_cache(l2p_ppa) && !pblk_ppa_empty(l2p_ppa))
1780                 pblk_map_invalidate(pblk, l2p_ppa);
1781
1782         pblk_trans_map_set(pblk, lba, ppa);
1783         spin_unlock(&pblk->trans_lock);
1784 }
1785
1786 void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
1787 {
1788 #ifdef CONFIG_NVM_DEBUG
1789         /* Callers must ensure that the ppa points to a cache address */
1790         BUG_ON(!pblk_addr_in_cache(ppa));
1791         BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa)));
1792 #endif
1793
1794         pblk_update_map(pblk, lba, ppa);
1795 }
1796
1797 int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
1798                        struct pblk_line *gc_line)
1799 {
1800         struct ppa_addr l2p_ppa;
1801         int ret = 1;
1802
1803 #ifdef CONFIG_NVM_DEBUG
1804         /* Callers must ensure that the ppa points to a cache address */
1805         BUG_ON(!pblk_addr_in_cache(ppa));
1806         BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa)));
1807 #endif
1808
1809         /* logic error: lba out-of-bounds. Ignore update */
1810         if (!(lba < pblk->rl.nr_secs)) {
1811                 WARN(1, "pblk: corrupted L2P map request\n");
1812                 return 0;
1813         }
1814
1815         spin_lock(&pblk->trans_lock);
1816         l2p_ppa = pblk_trans_map_get(pblk, lba);
1817
1818         /* Prevent updated entries to be overwritten by GC */
1819         if (pblk_addr_in_cache(l2p_ppa) || pblk_ppa_empty(l2p_ppa) ||
1820                                 pblk_tgt_ppa_to_line(l2p_ppa) != gc_line->id) {
1821                 ret = 0;
1822                 goto out;
1823         }
1824
1825         pblk_trans_map_set(pblk, lba, ppa);
1826 out:
1827         spin_unlock(&pblk->trans_lock);
1828         return ret;
1829 }
1830
1831 void pblk_update_map_dev(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
1832                          struct ppa_addr entry_line)
1833 {
1834         struct ppa_addr l2p_line;
1835
1836 #ifdef CONFIG_NVM_DEBUG
1837         /* Callers must ensure that the ppa points to a device address */
1838         BUG_ON(pblk_addr_in_cache(ppa));
1839 #endif
1840         /* Invalidate and discard padded entries */
1841         if (lba == ADDR_EMPTY) {
1842 #ifdef CONFIG_NVM_DEBUG
1843                 atomic_long_inc(&pblk->padded_wb);
1844 #endif
1845                 pblk_map_invalidate(pblk, ppa);
1846                 return;
1847         }
1848
1849         /* logic error: lba out-of-bounds. Ignore update */
1850         if (!(lba < pblk->rl.nr_secs)) {
1851                 WARN(1, "pblk: corrupted L2P map request\n");
1852                 return;
1853         }
1854
1855         spin_lock(&pblk->trans_lock);
1856         l2p_line = pblk_trans_map_get(pblk, lba);
1857
1858         /* Do not update L2P if the cacheline has been updated. In this case,
1859          * the mapped ppa must be invalidated
1860          */
1861         if (l2p_line.ppa != entry_line.ppa) {
1862                 if (!pblk_ppa_empty(ppa))
1863                         pblk_map_invalidate(pblk, ppa);
1864                 goto out;
1865         }
1866
1867 #ifdef CONFIG_NVM_DEBUG
1868         WARN_ON(!pblk_addr_in_cache(l2p_line) && !pblk_ppa_empty(l2p_line));
1869 #endif
1870
1871         pblk_trans_map_set(pblk, lba, ppa);
1872 out:
1873         spin_unlock(&pblk->trans_lock);
1874 }
1875
1876 void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
1877                          sector_t blba, int nr_secs)
1878 {
1879         int i;
1880
1881         spin_lock(&pblk->trans_lock);
1882         for (i = 0; i < nr_secs; i++)
1883                 ppas[i] = pblk_trans_map_get(pblk, blba + i);
1884         spin_unlock(&pblk->trans_lock);
1885 }
1886
1887 void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
1888                           u64 *lba_list, int nr_secs)
1889 {
1890         sector_t lba;
1891         int i;
1892
1893         spin_lock(&pblk->trans_lock);
1894         for (i = 0; i < nr_secs; i++) {
1895                 lba = lba_list[i];
1896                 if (lba == ADDR_EMPTY) {
1897                         ppas[i].ppa = ADDR_EMPTY;
1898                 } else {
1899                         /* logic error: lba out-of-bounds. Ignore update */
1900                         if (!(lba < pblk->rl.nr_secs)) {
1901                                 WARN(1, "pblk: corrupted L2P map request\n");
1902                                 continue;
1903                         }
1904                         ppas[i] = pblk_trans_map_get(pblk, lba);
1905                 }
1906         }
1907         spin_unlock(&pblk->trans_lock);
1908 }