IB/mlx5: Add advise_mr() support
The verb advise_mr() is used to give advice to the kernel about an address
range that belongs to a MR. Implement the verb and register it on the
device. The current implementation supports the only known advice to date,
prefetch.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 8e072f8..fd6ea1f7 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -1280,6 +1280,21 @@ static struct ib_mr *mlx5_ib_get_memic_mr(struct ib_pd *pd, u64 memic_addr,
return ERR_PTR(err);
}
+int mlx5_ib_advise_mr(struct ib_pd *pd,
+ enum ib_uverbs_advise_mr_advice advice,
+ u32 flags,
+ struct ib_sge *sg_list,
+ u32 num_sge,
+ struct uverbs_attr_bundle *attrs)
+{
+ if (advice != IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH &&
+ advice != IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH_WRITE)
+ return -EOPNOTSUPP;
+
+ return mlx5_ib_advise_mr_prefetch(pd, advice, flags,
+ sg_list, num_sge);
+}
+
struct ib_mr *mlx5_ib_reg_dm_mr(struct ib_pd *pd, struct ib_dm *dm,
struct ib_dm_mr_attr *attr,
struct uverbs_attr_bundle *attrs)