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authorMatias Bjørling <m@bjorling.me>2016-02-19 13:56:58 +0100
committerJens Axboe <axboe@fb.com>2016-03-03 14:45:53 -0700
commitd5bdec8ddb9f5fac3b351bed463a7132f6ba907b (patch)
treeda9483977df6e4d457d0ea0687d2d990ed961184 /drivers/nvme
parent5e422cffe822874cefc1657cd287c8647b2782dd (diff)
downloadlinux-d5bdec8ddb9f5fac3b351bed463a7132f6ba907b.tar.bz2
lightnvm: fold get bb tbl when using dual/quad plane mode
When the media manager runs in dual or quad plane mode, lightnvm abstracts away plane specific commands. This poses a problem for get bad block table, as it reports bad blocks per plane, making the table either two or four times bigger than expected. Fold the bad block list before returning. Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/lightnvm.c46
1 files changed, 41 insertions, 5 deletions
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 5cd3725e2fa4..d4f81f07f296 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -373,8 +373,31 @@ out:
return ret;
}
+static void nvme_nvm_bb_tbl_fold(struct nvm_dev *nvmdev,
+ int nr_dst_blks, u8 *dst_blks,
+ int nr_src_blks, u8 *src_blks)
+{
+ int blk, offset, pl, blktype;
+
+ for (blk = 0; blk < nr_dst_blks; blk++) {
+ offset = blk * nvmdev->plane_mode;
+ blktype = src_blks[offset];
+
+ /* Bad blocks on any planes take precedence over other types */
+ for (pl = 0; pl < nvmdev->plane_mode; pl++) {
+ if (src_blks[offset + pl] &
+ (NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
+ blktype = src_blks[offset + pl];
+ break;
+ }
+ }
+
+ dst_blks[blk] = blktype;
+ }
+}
+
static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
- int nr_blocks, nvm_bb_update_fn *update_bbtbl,
+ int nr_dst_blks, nvm_bb_update_fn *update_bbtbl,
void *priv)
{
struct request_queue *q = nvmdev->q;
@@ -382,7 +405,9 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
struct nvme_ctrl *ctrl = ns->ctrl;
struct nvme_nvm_command c = {};
struct nvme_nvm_bb_tbl *bb_tbl;
- int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blocks;
+ u8 *dst_blks = NULL;
+ int nr_src_blks = nr_dst_blks * nvmdev->plane_mode;
+ int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_src_blks;
int ret = 0;
c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
@@ -393,6 +418,12 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
if (!bb_tbl)
return -ENOMEM;
+ dst_blks = kzalloc(nr_dst_blks, GFP_KERNEL);
+ if (!dst_blks) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
ret = nvme_submit_sync_cmd(ctrl->admin_q, (struct nvme_command *)&c,
bb_tbl, tblsz);
if (ret) {
@@ -414,16 +445,21 @@ static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
goto out;
}
- if (le32_to_cpu(bb_tbl->tblks) != nr_blocks) {
+ if (le32_to_cpu(bb_tbl->tblks) != nr_src_blks) {
ret = -EINVAL;
dev_err(ctrl->dev, "bbt unsuspected blocks returned (%u!=%u)",
- le32_to_cpu(bb_tbl->tblks), nr_blocks);
+ le32_to_cpu(bb_tbl->tblks), nr_src_blks);
goto out;
}
+ nvme_nvm_bb_tbl_fold(nvmdev, nr_dst_blks, dst_blks,
+ nr_src_blks, bb_tbl->blk);
+
ppa = dev_to_generic_addr(nvmdev, ppa);
- ret = update_bbtbl(ppa, nr_blocks, bb_tbl->blk, priv);
+ ret = update_bbtbl(ppa, nr_dst_blks, dst_blks, priv);
+
out:
+ kfree(dst_blks);
kfree(bb_tbl);
return ret;
}