LCOV - code coverage report
Current view: top level - lib/ftl/nvc - ftl_nvc_bdev_non_vss.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 0 93 0.0 %
Date: 2024-11-20 01:37:30 Functions: 0 17 0.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright 2023 Solidigm All Rights Reserved
       3             :  */
       4             : 
       5             : #include "ftl_nvc_dev.h"
       6             : #include "ftl_core.h"
       7             : #include "ftl_layout.h"
       8             : #include "ftl_nv_cache.h"
       9             : #include "mngt/ftl_mngt.h"
      10             : #include "ftl_nvc_bdev_common.h"
      11             : 
      12             : static void write_io(struct ftl_io *io);
      13             : static void p2l_log_cb(struct ftl_io *io);
      14             : 
      15             : static int
      16           0 : init(struct spdk_ftl_dev *dev)
      17             : {
      18             :         int rc;
      19             : 
      20           0 :         rc = ftl_p2l_log_init(dev);
      21           0 :         if (rc) {
      22           0 :                 return 0;
      23             :         }
      24             : 
      25           0 :         return 0;
      26             : }
      27             : 
      28             : static void
      29           0 : deinit(struct spdk_ftl_dev *dev)
      30             : {
      31           0 :         ftl_p2l_log_deinit(dev);
      32           0 : }
      33             : 
      34             : static bool
      35           0 : is_bdev_compatible(struct spdk_ftl_dev *dev, struct spdk_bdev *bdev)
      36             : {
      37           0 :         if (spdk_bdev_get_md_size(bdev) != 0) {
      38             :                 /* Bdev's metadata is invalid size */
      39           0 :                 return false;
      40             :         }
      41             : 
      42           0 :         return true;
      43             : }
      44             : 
      45             : static void
      46           0 : on_chunk_open(struct spdk_ftl_dev *dev, struct ftl_nv_cache_chunk *chunk)
      47             : {
      48           0 :         assert(NULL == chunk->p2l_log);
      49           0 :         chunk->p2l_log = ftl_p2l_log_acquire(dev, chunk->md->seq_id, p2l_log_cb);
      50           0 :         chunk->md->p2l_log_type = ftl_p2l_log_type(chunk->p2l_log);
      51           0 : }
      52             : 
      53             : static void
      54           0 : on_chunk_closed(struct spdk_ftl_dev *dev, struct ftl_nv_cache_chunk *chunk)
      55             : {
      56           0 :         assert(chunk->p2l_log);
      57           0 :         ftl_p2l_log_release(dev, chunk->p2l_log);
      58           0 :         chunk->p2l_log = NULL;
      59           0 : }
      60             : 
      61             : static void
      62           0 : p2l_log_cb(struct ftl_io *io)
      63             : {
      64           0 :         ftl_nv_cache_write_complete(io, true);
      65           0 : }
      66             : 
      67             : static void
      68           0 : write_io_cb(struct spdk_bdev_io *bdev_io, bool success, void *ctx)
      69             : {
      70           0 :         struct ftl_io *io = ctx;
      71             : 
      72           0 :         ftl_stats_bdev_io_completed(io->dev, FTL_STATS_TYPE_USER, bdev_io);
      73           0 :         spdk_bdev_free_io(bdev_io);
      74             : 
      75           0 :         if (spdk_likely(success)) {
      76           0 :                 struct ftl_p2l_log *log = io->nv_cache_chunk->p2l_log;
      77           0 :                 ftl_p2l_log_io(log, io);
      78             :         } else {
      79           0 :                 ftl_nv_cache_write_complete(io, false);
      80             :         }
      81           0 : }
      82             : 
      83             : static void
      84           0 : write_io_retry(void *ctx)
      85             : {
      86           0 :         struct ftl_io *io = ctx;
      87             : 
      88           0 :         write_io(io);
      89           0 : }
      90             : 
      91             : static void
      92           0 : write_io(struct ftl_io *io)
      93             : {
      94           0 :         struct spdk_ftl_dev *dev = io->dev;
      95           0 :         struct ftl_nv_cache *nv_cache = &dev->nv_cache;
      96             :         int rc;
      97             : 
      98           0 :         rc = spdk_bdev_writev_blocks(nv_cache->bdev_desc, nv_cache->cache_ioch,
      99           0 :                                      io->iov, io->iov_cnt,
     100             :                                      ftl_addr_to_nvc_offset(dev, io->addr), io->num_blocks,
     101             :                                      write_io_cb, io);
     102           0 :         if (spdk_unlikely(rc)) {
     103           0 :                 if (rc == -ENOMEM) {
     104           0 :                         struct spdk_bdev *bdev = spdk_bdev_desc_get_bdev(nv_cache->bdev_desc);
     105           0 :                         io->bdev_io_wait.bdev = bdev;
     106           0 :                         io->bdev_io_wait.cb_fn = write_io_retry;
     107           0 :                         io->bdev_io_wait.cb_arg = io;
     108           0 :                         spdk_bdev_queue_io_wait(bdev, nv_cache->cache_ioch, &io->bdev_io_wait);
     109             :                 } else {
     110           0 :                         ftl_abort();
     111             :                 }
     112             :         }
     113           0 : }
     114             : 
     115             : static void
     116           0 : process(struct spdk_ftl_dev *dev)
     117             : {
     118           0 :         ftl_p2l_log_flush(dev);
     119           0 : }
     120             : 
     121             : struct recovery_chunk_ctx {
     122             :         struct ftl_nv_cache_chunk *chunk;
     123             : };
     124             : 
     125             : static void
     126           0 : recovery_chunk_recover_p2l_map_cb(void *cb_arg, int status)
     127             : {
     128           0 :         struct ftl_mngt_process *mngt = cb_arg;
     129             : 
     130           0 :         if (status) {
     131           0 :                 ftl_mngt_fail_step(mngt);
     132             :         } else {
     133           0 :                 ftl_mngt_next_step(mngt);
     134             :         }
     135           0 : }
     136             : 
     137             : static int
     138           0 : recovery_chunk_recover_p2l_map_read_cb(struct spdk_ftl_dev *dev, void *cb_arg,
     139             :                                        uint64_t lba, ftl_addr addr, uint64_t seq_id)
     140             : {
     141           0 :         struct ftl_mngt_process *mngt = cb_arg;
     142           0 :         struct recovery_chunk_ctx *ctx = ftl_mngt_get_process_ctx(mngt);
     143           0 :         struct ftl_nv_cache_chunk *chunk = ctx->chunk;
     144             : 
     145           0 :         ftl_nv_cache_chunk_set_addr(chunk, lba, addr);
     146             : 
     147             :         /* TODO We could stop scanning when getting all LBA within the chunk */
     148           0 :         return 0;
     149             : }
     150             : 
     151             : 
     152             : static void
     153           0 : recovery_chunk_recover_p2l_map(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
     154             : {
     155           0 :         struct recovery_chunk_ctx *ctx = ftl_mngt_get_process_ctx(mngt);
     156           0 :         struct ftl_nv_cache_chunk *chunk = ctx->chunk;
     157             :         int rc;
     158             : 
     159           0 :         rc = ftl_p2l_log_read(dev, chunk->md->p2l_log_type, chunk->md->seq_id,
     160             :                               recovery_chunk_recover_p2l_map_cb, mngt,
     161             :                               recovery_chunk_recover_p2l_map_read_cb);
     162             : 
     163           0 :         if (rc) {
     164           0 :                 ftl_mngt_fail_step(mngt);
     165             :         }
     166           0 : }
     167             : 
     168             : static int
     169           0 : recovery_chunk_init(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt,
     170             :                     void *init_ctx)
     171             : {
     172           0 :         struct recovery_chunk_ctx *ctx = ftl_mngt_get_process_ctx(mngt);
     173             : 
     174           0 :         ctx->chunk = init_ctx;
     175           0 :         return 0;
     176             : }
     177             : 
     178             : static const struct ftl_mngt_process_desc desc_chunk_recovery = {
     179             :         .name = "Recover open chunk",
     180             :         .ctx_size = sizeof(struct recovery_chunk_ctx),
     181             :         .init_handler = recovery_chunk_init,
     182             :         .steps = {
     183             :                 {
     184             :                         .name = "Recover chunk P2L map",
     185             :                         .action = recovery_chunk_recover_p2l_map,
     186             :                 },
     187             :                 {}
     188             :         }
     189             : };
     190             : 
     191             : static void
     192           0 : recover_open_chunk(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt,
     193             :                    struct ftl_nv_cache_chunk *chunk)
     194             : {
     195           0 :         ftl_mngt_call_process(mngt, &desc_chunk_recovery, chunk);
     196           0 : }
     197             : 
     198             : static int
     199           0 : setup_layout(struct spdk_ftl_dev *dev)
     200             : {
     201           0 :         const struct ftl_md_layout_ops *md_ops = &dev->nv_cache.nvc_type->ops.md_layout_ops;
     202           0 :         const uint64_t blocks = ftl_p2l_log_get_md_blocks_required(dev, 1, ftl_get_num_blocks_in_band(dev));
     203             :         enum ftl_layout_region_type region_type;
     204             : 
     205           0 :         for (region_type = FTL_LAYOUT_REGION_TYPE_P2L_LOG_IO_MIN;
     206           0 :              region_type <= FTL_LAYOUT_REGION_TYPE_P2L_LOG_IO_MAX;
     207           0 :              region_type++) {
     208           0 :                 if (md_ops->region_create(dev, region_type, FTL_P2L_LOG_VERSION_CURRENT, blocks)) {
     209           0 :                         return -1;
     210             :                 }
     211             : 
     212           0 :                 if (md_ops->region_open(dev, region_type, FTL_P2L_LOG_VERSION_CURRENT,
     213             :                                         FTL_BLOCK_SIZE, blocks,
     214             :                                         &dev->layout.region[region_type])) {
     215           0 :                         return -1;
     216             :                 }
     217             :         }
     218             : 
     219           0 :         return 0;
     220             : }
     221             : 
     222             : struct ftl_nv_cache_device_type nvc_bdev_non_vss = {
     223             :         .name = "bdev-non-vss",
     224             :         .features = {
     225             :         },
     226             :         .ops = {
     227             :                 .init = init,
     228             :                 .deinit = deinit,
     229             :                 .on_chunk_open = on_chunk_open,
     230             :                 .on_chunk_closed = on_chunk_closed,
     231             :                 .is_bdev_compatible = is_bdev_compatible,
     232             :                 .is_chunk_active = ftl_nvc_bdev_common_is_chunk_active,
     233             :                 .setup_layout = setup_layout,
     234             :                 .md_layout_ops = {
     235             :                         .region_create = ftl_nvc_bdev_common_region_create,
     236             :                         .region_open = ftl_nvc_bdev_common_region_open,
     237             :                 },
     238             :                 .process = process,
     239             :                 .write = write_io,
     240             :                 .recover_open_chunk = recover_open_chunk
     241             :         }
     242             : };
     243           0 : FTL_NV_CACHE_DEVICE_TYPE_REGISTER(nvc_bdev_non_vss)

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