net/mlx5: Create bypass and loopback flow steering namespaces for RDMA RX

Use different namespaces for bypass and switchdev loopback because they
have different priorities and default table miss action requirement:
1. bypass: with multiple priorities support, and
   MLX5_FLOW_TABLE_MISS_ACTION_DEF as the default table miss action;
2. switchdev loopback: with single priority support, and
   MLX5_FLOW_TABLE_MISS_ACTION_SWITCH_DOMAIN as the default table miss
   action.

Signed-off-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index fb3cfdf..7bdec44 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -182,6 +182,26 @@ static struct init_tree_node egress_root_fs = {
        }
 };
 
+#define RDMA_RX_BYPASS_PRIO 0
+#define RDMA_RX_KERNEL_PRIO 1
+static struct init_tree_node rdma_rx_root_fs = {
+       .type = FS_TYPE_NAMESPACE,
+       .ar_size = 2,
+       .children = (struct init_tree_node[]) {
+               [RDMA_RX_BYPASS_PRIO] =
+               ADD_PRIO(0, MLX5_BY_PASS_NUM_REGULAR_PRIOS, 0,
+                        FS_CHAINING_CAPS,
+                        ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_DEF,
+                               ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_REGULAR_PRIOS,
+                                                 BY_PASS_PRIO_NUM_LEVELS))),
+               [RDMA_RX_KERNEL_PRIO] =
+               ADD_PRIO(0, MLX5_BY_PASS_NUM_REGULAR_PRIOS + 1, 0,
+                        FS_CHAINING_CAPS,
+                        ADD_NS(MLX5_FLOW_TABLE_MISS_ACTION_SWITCH_DOMAIN,
+                               ADD_MULTIPLE_PRIO(1, 1))),
+       }
+};
+
 enum fs_i_lock_class {
        FS_LOCK_GRANDPARENT,
        FS_LOCK_PARENT,
@@ -2067,16 +2087,18 @@ struct mlx5_flow_namespace *mlx5_get_flow_namespace(struct mlx5_core_dev *dev,
                if (steering->sniffer_tx_root_ns)
                        return &steering->sniffer_tx_root_ns->ns;
                return NULL;
-       case MLX5_FLOW_NAMESPACE_RDMA_RX:
-               if (steering->rdma_rx_root_ns)
-                       return &steering->rdma_rx_root_ns->ns;
-               return NULL;
        default:
                break;
        }
 
        if (type == MLX5_FLOW_NAMESPACE_EGRESS) {
                root_ns = steering->egress_root_ns;
+       } else if (type == MLX5_FLOW_NAMESPACE_RDMA_RX) {
+               root_ns = steering->rdma_rx_root_ns;
+               prio = RDMA_RX_BYPASS_PRIO;
+       } else if (type == MLX5_FLOW_NAMESPACE_RDMA_RX_KERNEL) {
+               root_ns = steering->rdma_rx_root_ns;
+               prio = RDMA_RX_KERNEL_PRIO;
        } else { /* Must be NIC RX */
                root_ns = steering->root_ns;
                prio = type;
@@ -2507,18 +2529,25 @@ static int init_sniffer_rx_root_ns(struct mlx5_flow_steering *steering)
 
 static int init_rdma_rx_root_ns(struct mlx5_flow_steering *steering)
 {
-       struct fs_prio *prio;
+       int err;
 
        steering->rdma_rx_root_ns = create_root_ns(steering, FS_FT_RDMA_RX);
        if (!steering->rdma_rx_root_ns)
                return -ENOMEM;
 
-       steering->rdma_rx_root_ns->ns.def_miss_action =
-               MLX5_FLOW_TABLE_MISS_ACTION_SWITCH_DOMAIN;
+       err = init_root_tree(steering, &rdma_rx_root_fs,
+                            &steering->rdma_rx_root_ns->ns.node);
+       if (err)
+               goto out_err;
 
-       /* Create single prio */
-       prio = fs_create_prio(&steering->rdma_rx_root_ns->ns, 0, 1);
-       return PTR_ERR_OR_ZERO(prio);
+       set_prio_attrs(steering->rdma_rx_root_ns);
+
+       return 0;
+
+out_err:
+       cleanup_root_ns(steering->rdma_rx_root_ns);
+       steering->rdma_rx_root_ns = NULL;
+       return err;
 }
 static int init_fdb_root_ns(struct mlx5_flow_steering *steering)
 {

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/rdma.c b/drivers/net/ethernet/mellanox/mlx5/core/rdma.c
index 17ce9dd..18af698 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/rdma.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/rdma.c
@@ -51,7 +51,7 @@ static int mlx5_rdma_enable_roce_steering(struct mlx5_core_dev *dev)
                return -ENOMEM;
        }
 
-       ns = mlx5_get_flow_namespace(dev, MLX5_FLOW_NAMESPACE_RDMA_RX);
+       ns = mlx5_get_flow_namespace(dev, MLX5_FLOW_NAMESPACE_RDMA_RX_KERNEL);
        if (!ns) {
                mlx5_core_err(dev, "Failed to get RDMA RX namespace");
                err = -EOPNOTSUPP;

diff --git a/include/linux/mlx5/fs.h b/include/linux/mlx5/fs.h
index 04a5695..5235b09 100644 (file)
--- a/include/linux/mlx5/fs.h
+++ b/include/linux/mlx5/fs.h
@@ -75,6 +75,7 @@ enum mlx5_flow_namespace_type {
        MLX5_FLOW_NAMESPACE_SNIFFER_TX,
        MLX5_FLOW_NAMESPACE_EGRESS,
        MLX5_FLOW_NAMESPACE_RDMA_RX,
+       MLX5_FLOW_NAMESPACE_RDMA_RX_KERNEL,
 };
 
 enum {