RDMA/mlx5: Disable out-of-order in integrity enabled QPs

Set retry_mode to GO_BACK_N when qp is created with INTEGRITY_EN flag
because out-of-order is not supported when doing HW offload of signature
operations.

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/362de42cdc7a541afa5b1fd0ec6ae706061764a2.1679230449.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 7cc3b97..0fdbf79 100644 (file)
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -60,6 +60,10 @@ enum raw_qp_set_mask_map {
        MLX5_RAW_QP_RATE_LIMIT                  = 1UL << 1,
 };
 
+enum {
+       MLX5_QP_RM_GO_BACK_N                    = 0x1,
+};
+
 struct mlx5_modify_raw_qp_param {
        u16 operation;
 
@@ -2519,6 +2523,10 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
        if (qp->flags & IB_QP_CREATE_IPOIB_UD_LSO)
                MLX5_SET(qpc, qpc, ulp_stateless_offload_mode, 1);
 
+       if (qp->flags & IB_QP_CREATE_INTEGRITY_EN &&
+           MLX5_CAP_GEN(mdev, go_back_n))
+               MLX5_SET(qpc, qpc, retry_mode, MLX5_QP_RM_GO_BACK_N);
+
        err = mlx5_qpc_create_qp(dev, &base->mqp, in, inlen, out);
        kvfree(in);
        if (err)