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Commit e6806e9a authored by Mark Zhang's avatar Mark Zhang Committed by Leon Romanovsky
Browse files

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: default avatarMark Zhang <markz@mellanox.com>
Reviewed-by: default avatarMark Bloch <markb@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
parent f66ad830

drivers/net/ethernet/mellanox/mlx5/core/fs_core.c

+39 −10
Original line number Diff line number Diff line
@@ -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)

{

drivers/net/ethernet/mellanox/mlx5/core/rdma.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

include/linux/mlx5/fs.h

+1 −0
Original line number Diff line number Diff line
@@ -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 {