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Map IB_ACCESS_UNORDERED to the Unordered mkey ordering level of the mlx5 core helper, which sets relaxed ordering and, when supported, relaxed read-after-write ordering. Extend the current enablement of ATS over DMABUF with RO access to also enable for DMABUF with Unordered access. Mark IB_ACCESS_UNORDERED as non-UMR-modifiable: there is no UMR mkey-mask bit for order_read_after_write, so UMR cannot drive it. Reviewed-by: Yishai Hadas Signed-off-by: Michael Gur --- drivers/infiniband/hw/mlx5/mlx5_ib.h | 4 +++- drivers/infiniband/hw/mlx5/umr.h | 2 +- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index dd1fe8fd4220..75ea3f91e931 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -1672,11 +1672,13 @@ static inline bool mlx5_umem_needs_ats(struct mlx5_ib_dev *dev, { if (!MLX5_CAP_GEN(dev->mdev, ats) || !umem->is_dmabuf) return false; - return access_flags & IB_ACCESS_RELAXED_ORDERING; + return access_flags & (IB_ACCESS_RELAXED_ORDERING | IB_ACCESS_UNORDERED); } static inline enum mlx5_mkey_order mlx5r_access_to_mkey_order(int access_flags) { + if (access_flags & IB_ACCESS_UNORDERED) + return MLX5_MKEY_ORDER_UNORDERED; if (access_flags & IB_ACCESS_RELAXED_ORDERING) return MLX5_MKEY_ORDER_RELAXED; return MLX5_MKEY_ORDER_STRICT; diff --git a/drivers/infiniband/hw/mlx5/umr.h b/drivers/infiniband/hw/mlx5/umr.h index a6c4f35b75e6..78b91d614a17 100644 --- a/drivers/infiniband/hw/mlx5/umr.h +++ b/drivers/infiniband/hw/mlx5/umr.h @@ -49,7 +49,7 @@ static inline unsigned int mlx5r_umr_get_unchangeable_access_flags(struct mlx5_ib_dev *dev, unsigned int access_flags) { - unsigned int ret = 0; + unsigned int ret = access_flags & IB_ACCESS_UNORDERED; if ((access_flags & IB_ACCESS_REMOTE_ATOMIC) && MLX5_CAP_GEN(dev->mdev, atomic) && -- 2.52.0