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authorJavier Gonzalez <javier@javigon.com>2015-11-20 15:47:56 +0300
committerJens Axboe <axboe@fb.com>2015-11-20 18:33:20 +0300
commit0b59733b95f9d7af6bee6e6a4d0d444eb694c514 (patch)
tree8cc6efa06ebc51e8fc15021c46821be456913f23 /drivers
parent47b3115ae7b799be8b77b0f024215ad4f68d6460 (diff)
downloadlinux-0b59733b95f9d7af6bee6e6a4d0d444eb694c514.tar.xz
lightnvm: keep track of block counts
Maintain number of in use blocks, free blocks, and bad blocks in a per lun basis. This allows the upper layers to get information about the state of each lun. Also, account for blocks reserved to the device on the free block count. nr_free_blocks matches now the actual number of blocks on the free list when the device is booted. Signed-off-by: Javier Gonzalez <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/lightnvm/gennvm.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index c0d0eb2357a8..43c01e0af887 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -60,6 +60,8 @@ static int gennvm_luns_init(struct nvm_dev *dev, struct gen_nvm *gn)
lun->vlun.lun_id = i % dev->luns_per_chnl;
lun->vlun.chnl_id = i / dev->luns_per_chnl;
lun->vlun.nr_free_blocks = dev->blks_per_lun;
+ lun->vlun.nr_inuse_blocks = 0;
+ lun->vlun.nr_bad_blocks = 0;
}
return 0;
}
@@ -87,6 +89,7 @@ static int gennvm_block_bb(struct ppa_addr ppa, int nr_blocks, u8 *blks,
}
list_move_tail(&blk->list, &lun->bb_list);
+ lun->vlun.nr_bad_blocks++;
}
return 0;
@@ -139,6 +142,7 @@ static int gennvm_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
list_move_tail(&blk->list, &lun->used_list);
blk->type = 1;
lun->vlun.nr_free_blocks--;
+ lun->vlun.nr_inuse_blocks++;
}
}
@@ -167,8 +171,10 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
block->id = cur_block_id++;
/* First block is reserved for device */
- if (unlikely(lun_iter == 0 && blk_iter == 0))
+ if (unlikely(lun_iter == 0 && blk_iter == 0)) {
+ lun->vlun.nr_free_blocks--;
continue;
+ }
list_add_tail(&block->list, &lun->free_list);
}
@@ -266,6 +272,7 @@ static struct nvm_block *gennvm_get_blk(struct nvm_dev *dev,
blk->type = 1;
lun->vlun.nr_free_blocks--;
+ lun->vlun.nr_inuse_blocks++;
spin_unlock(&vlun->lock);
out:
@@ -283,16 +290,21 @@ static void gennvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
case 1:
list_move_tail(&blk->list, &lun->free_list);
lun->vlun.nr_free_blocks++;
+ lun->vlun.nr_inuse_blocks--;
blk->type = 0;
break;
case 2:
list_move_tail(&blk->list, &lun->bb_list);
+ lun->vlun.nr_bad_blocks++;
+ lun->vlun.nr_inuse_blocks--;
break;
default:
WARN_ON_ONCE(1);
pr_err("gennvm: erroneous block type (%lu -> %u)\n",
blk->id, blk->type);
list_move_tail(&blk->list, &lun->bb_list);
+ lun->vlun.nr_bad_blocks++;
+ lun->vlun.nr_inuse_blocks--;
}
spin_unlock(&vlun->lock);