Line data    Source code

       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2018 Intel Corporation.
       3             :  *   All rights reserved.
       4             :  */
       5             : 
       6             : #include "spdk/ftl.h"
       7             : #include "ftl_debug.h"
       8             : #include "ftl_band.h"
       9             : 
      10             : /* TODO: Switch to INFOLOG instead, we can control the printing via spdk_log_get_flag */
      11             : #if defined(DEBUG)
      12             : 
      13             : static const char *ftl_band_state_str[] = {
      14             :         "free",
      15             :         "prep",
      16             :         "opening",
      17             :         "open",
      18             :         "full",
      19             :         "closing",
      20             :         "closed",
      21             :         "max"
      22             : };
      23             : 
      24             : struct ftl_band_validate_ctx {
      25             :         struct ftl_band *band;
      26             :         ftl_band_validate_md_cb cb;
      27             :         int remaining;
      28             :         uint64_t pin_cnt;
      29             :         uint64_t current_offset;
      30             :         struct ftl_l2p_pin_ctx l2p_pin_ctx[];
      31             : };
      32             : 
      33             : static void ftl_band_validate_md_l2p_pin_cb(struct spdk_ftl_dev *dev, int status,
      34             :                 struct ftl_l2p_pin_ctx *pin_ctx);
      35             : 
      36             : #define FTL_MD_VALIDATE_LBA_PER_ITERATION 128
      37             : 
      38             : static void
      39           0 : ftl_band_validate_md_pin(struct ftl_band_validate_ctx *ctx)
      40             : {
      41           0 :         struct ftl_band *band = ctx->band;
      42           0 :         struct spdk_ftl_dev *dev = band->dev;
      43           0 :         struct ftl_p2l_map *p2l_map = &band->p2l_map;
      44             :         size_t i, size;
      45           0 :         struct ftl_l2p_pin_ctx tmp_pin_ctx = {
      46             :                 .cb_ctx = ctx
      47             :         };
      48             : 
      49             :         /* Since the first L2P page may already be pinned, the ftl_band_validate_md_l2p_pin_cb could be prematurely
      50             :          * triggered. Initializing to 1 and then triggering the callback again manually prevents the issue.
      51             :          */
      52           0 :         ctx->remaining = 1;
      53           0 :         size = spdk_min(FTL_MD_VALIDATE_LBA_PER_ITERATION,
      54             :                         ftl_get_num_blocks_in_band(dev) - ctx->current_offset);
      55             : 
      56           0 :         for (i = ctx->current_offset; i < ctx->current_offset + size; ++i) {
      57           0 :                 if (!ftl_bitmap_get(p2l_map->valid, i)) {
      58           0 :                         ctx->l2p_pin_ctx[i].lba = FTL_LBA_INVALID;
      59           0 :                         continue;
      60             :                 }
      61             : 
      62           0 :                 assert(p2l_map->band_map[i].lba != FTL_LBA_INVALID);
      63           0 :                 ctx->remaining++;
      64           0 :                 ctx->pin_cnt++;
      65           0 :                 ftl_l2p_pin(dev, p2l_map->band_map[i].lba, 1, ftl_band_validate_md_l2p_pin_cb, ctx,
      66             :                             &ctx->l2p_pin_ctx[i]);
      67             :         }
      68             : 
      69           0 :         ftl_band_validate_md_l2p_pin_cb(dev, 0, &tmp_pin_ctx);
      70           0 : }
      71             : 
      72             : static void
      73           0 : _ftl_band_validate_md(void *_ctx)
      74             : {
      75           0 :         struct ftl_band_validate_ctx *ctx = _ctx;
      76           0 :         struct ftl_band *band = ctx->band;
      77           0 :         struct spdk_ftl_dev *dev = band->dev;
      78             :         ftl_addr addr_l2p;
      79             :         size_t i, size;
      80           0 :         bool valid = true;
      81             :         uint64_t lba;
      82             : 
      83           0 :         size = spdk_min(FTL_MD_VALIDATE_LBA_PER_ITERATION,
      84             :                         ftl_get_num_blocks_in_band(dev) - ctx->current_offset);
      85             : 
      86           0 :         for (i = ctx->current_offset; i < ctx->current_offset + size; ++i) {
      87           0 :                 lba = ctx->l2p_pin_ctx[i].lba;
      88           0 :                 if (lba == FTL_LBA_INVALID) {
      89           0 :                         continue;
      90             :                 }
      91             : 
      92           0 :                 if (ftl_bitmap_get(band->p2l_map.valid, i)) {
      93           0 :                         addr_l2p = ftl_l2p_get(dev, lba);
      94             : 
      95           0 :                         if (addr_l2p != FTL_ADDR_INVALID && !ftl_addr_in_nvc(dev, addr_l2p) &&
      96           0 :                             addr_l2p != ftl_band_addr_from_block_offset(band, i)) {
      97           0 :                                 valid = false;
      98             :                         }
      99             :                 }
     100             : 
     101           0 :                 ctx->pin_cnt--;
     102           0 :                 ftl_l2p_unpin(dev, lba, 1);
     103             :         }
     104           0 :         assert(ctx->pin_cnt == 0);
     105             : 
     106           0 :         ctx->current_offset += size;
     107             : 
     108           0 :         if (ctx->current_offset == ftl_get_num_blocks_in_band(dev)) {
     109           0 :                 ctx->cb(band, valid);
     110           0 :                 free(ctx);
     111           0 :                 return;
     112             :         }
     113             : 
     114           0 :         ftl_band_validate_md_pin(ctx);
     115             : }
     116             : 
     117             : static void
     118           0 : ftl_band_validate_md_l2p_pin_cb(struct spdk_ftl_dev *dev, int status,
     119             :                                 struct ftl_l2p_pin_ctx *pin_ctx)
     120             : {
     121           0 :         struct ftl_band_validate_ctx *ctx = pin_ctx->cb_ctx;
     122             : 
     123           0 :         assert(status == 0);
     124             : 
     125           0 :         if (--ctx->remaining == 0) {
     126           0 :                 spdk_thread_send_msg(dev->core_thread, _ftl_band_validate_md, ctx);
     127             :         }
     128           0 : }
     129             : 
     130             : void
     131           0 : ftl_band_validate_md(struct ftl_band *band, ftl_band_validate_md_cb cb)
     132             : {
     133             :         struct ftl_band_validate_ctx *ctx;
     134             :         size_t size;
     135             : 
     136           0 :         assert(cb);
     137             : 
     138           0 :         size = ftl_get_num_blocks_in_band(band->dev);
     139             : 
     140           0 :         ctx = malloc(sizeof(*ctx) + size * sizeof(*ctx->l2p_pin_ctx));
     141             : 
     142           0 :         if (!ctx) {
     143           0 :                 FTL_ERRLOG(band->dev, "Failed to allocate memory for band validate context");
     144           0 :                 cb(band, false);
     145           0 :                 return;
     146             :         }
     147             : 
     148           0 :         ctx->band = band;
     149           0 :         ctx->cb = cb;
     150           0 :         ctx->pin_cnt = 0;
     151           0 :         ctx->current_offset = 0;
     152             : 
     153           0 :         ftl_band_validate_md_pin(ctx);
     154             : }
     155             : 
     156             : void
     157           0 : ftl_dev_dump_bands(struct spdk_ftl_dev *dev)
     158             : {
     159             :         uint64_t i;
     160             : 
     161           0 :         if (!dev->bands) {
     162           0 :                 return;
     163             :         }
     164             : 
     165           0 :         FTL_NOTICELOG(dev, "Bands validity:\n");
     166           0 :         for (i = 0; i < ftl_get_num_bands(dev); ++i) {
     167           0 :                 FTL_NOTICELOG(dev, " Band %3zu: %8zu / %zu \twr_cnt: %"PRIu64
     168             :                               "\tstate: %s\n",
     169             :                               i + 1, dev->bands[i].p2l_map.num_valid,
     170             :                               ftl_band_user_blocks(&dev->bands[i]),
     171             :                               dev->bands[i].md->wr_cnt,
     172             :                               ftl_band_state_str[dev->bands[i].md->state]);
     173             :         }
     174             : }
     175             : 
     176             : #endif /* defined(DEBUG) */
     177             : 
     178             : void
     179           0 : ftl_dev_dump_stats(const struct spdk_ftl_dev *dev)
     180             : {
     181           0 :         uint64_t i, total = 0;
     182           0 :         char uuid[SPDK_UUID_STRING_LEN];
     183             :         double waf;
     184             :         uint64_t write_user, write_total;
     185           0 :         const char *limits[] = {
     186             :                 [SPDK_FTL_LIMIT_CRIT]  = "crit",
     187             :                 [SPDK_FTL_LIMIT_HIGH]  = "high",
     188             :                 [SPDK_FTL_LIMIT_LOW]   = "low",
     189             :                 [SPDK_FTL_LIMIT_START] = "start"
     190             :         };
     191             : 
     192             :         (void)limits;
     193             : 
     194           0 :         if (!dev->bands) {
     195           0 :                 return;
     196             :         }
     197             : 
     198             :         /* Count the number of valid LBAs */
     199           0 :         for (i = 0; i < ftl_get_num_bands(dev); ++i) {
     200           0 :                 total += dev->bands[i].p2l_map.num_valid;
     201             :         }
     202             : 
     203           0 :         write_user = dev->stats.entries[FTL_STATS_TYPE_CMP].write.blocks;
     204           0 :         write_total = write_user +
     205           0 :                       dev->stats.entries[FTL_STATS_TYPE_GC].write.blocks +
     206           0 :                       dev->stats.entries[FTL_STATS_TYPE_MD_BASE].write.blocks;
     207             : 
     208           0 :         waf = (double)write_total / (double)write_user;
     209             : 
     210           0 :         spdk_uuid_fmt_lower(uuid, sizeof(uuid), &dev->conf.uuid);
     211           0 :         FTL_NOTICELOG(dev, "\n");
     212           0 :         FTL_NOTICELOG(dev, "device UUID:         %s\n", uuid);
     213           0 :         FTL_NOTICELOG(dev, "total valid LBAs:    %zu\n", total);
     214           0 :         FTL_NOTICELOG(dev, "total writes:        %"PRIu64"\n", write_total);
     215           0 :         FTL_NOTICELOG(dev, "user writes:         %"PRIu64"\n", write_user);
     216           0 :         FTL_NOTICELOG(dev, "WAF:                 %.4lf\n", waf);
     217             : #ifdef DEBUG
     218           0 :         FTL_NOTICELOG(dev, "limits:\n");
     219           0 :         for (i = 0; i < SPDK_FTL_LIMIT_MAX; ++i) {
     220           0 :                 FTL_NOTICELOG(dev, " %5s: %"PRIu64"\n", limits[i], dev->stats.limits[i]);
     221             :         }
     222             : #endif
     223             : }