IB/mlx5: Add Scatter FCS support for Raw Packet QP

Enable Scatter FCS in the RQ context when the user passes
Scatter FCS create flag.

Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index b46c255..fb0a110 100644 (file)
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -356,6 +356,7 @@ enum mlx5_ib_qp_flags {
        MLX5_IB_QP_SIGNATURE_HANDLING           = 1 << 5,
        /* QP uses 1 as its source QP number */
        MLX5_IB_QP_SQPN_QP1                     = 1 << 6,
+       MLX5_IB_QP_CAP_SCATTER_FCS              = 1 << 7,
 };
 
 struct mlx5_umr_wr {

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 8dee8bc..5041176 100644 (file)
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -1028,6 +1028,7 @@ static int get_rq_pas_size(void *qpc)
 static int create_raw_packet_qp_rq(struct mlx5_ib_dev *dev,
                                   struct mlx5_ib_rq *rq, void *qpin)
 {
+       struct mlx5_ib_qp *mqp = rq->base.container_mibqp;
        __be64 *pas;
        __be64 *qp_pas;
        void *in;
@@ -1051,6 +1052,9 @@ static int create_raw_packet_qp_rq(struct mlx5_ib_dev *dev,
        MLX5_SET(rqc, rqc, user_index, MLX5_GET(qpc, qpc, user_index));
        MLX5_SET(rqc, rqc, cqn, MLX5_GET(qpc, qpc, cqn_rcv));
 
+       if (mqp->flags & MLX5_IB_QP_CAP_SCATTER_FCS)
+               MLX5_SET(rqc, rqc, scatter_fcs, 1);
+
        wq = MLX5_ADDR_OF(rqc, rqc, wq);
        MLX5_SET(wq, wq, wq_type, MLX5_WQ_TYPE_CYCLIC);
        MLX5_SET(wq, wq, end_padding_mode,
@@ -1136,11 +1140,12 @@ static int create_raw_packet_qp(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
        }
 
        if (qp->rq.wqe_cnt) {
+               rq->base.container_mibqp = qp;
+
                err = create_raw_packet_qp_rq(dev, rq, in);
                if (err)
                        goto err_destroy_sq;
 
-               rq->base.container_mibqp = qp;
 
                err = create_raw_packet_qp_tir(dev, rq, tdn);
                if (err)
@@ -1252,6 +1257,19 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
                        return -EOPNOTSUPP;
                }
 
+       if (init_attr->create_flags & IB_QP_CREATE_SCATTER_FCS) {
+               if (init_attr->qp_type != IB_QPT_RAW_PACKET) {
+                       mlx5_ib_dbg(dev, "Scatter FCS is supported only for Raw Packet QPs");
+                       return -EOPNOTSUPP;
+               }
+               if (!MLX5_CAP_GEN(dev->mdev, eth_net_offloads) ||
+                   !MLX5_CAP_ETH(dev->mdev, scatter_fcs)) {
+                       mlx5_ib_dbg(dev, "Scatter FCS isn't supported\n");
+                       return -EOPNOTSUPP;
+               }
+               qp->flags |= MLX5_IB_QP_CAP_SCATTER_FCS;
+       }
+
        if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
                qp->sq_signal_bits = MLX5_WQE_CTRL_CQ_UPDATE;