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net/mlx5e: Add netdev support for VXLAN tunneling
If a VXLAN udp dport is added to device it will:
- Configure the hardware to offload the port (up to the max
supported).
- Advertise NETIF_F_GSO_UDP_TUNNEL and supported hw_enc_features.
Signed-off-by: Matthew Finlay <matt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>- Loading branch information
Matthew Finlay
authored and
David S. Miller
committed
Feb 24, 2016
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| /* | ||
| * Copyright (c) 2016, Mellanox Technologies, Ltd. All rights reserved. | ||
| * | ||
| * This software is available to you under a choice of one of two | ||
| * licenses. You may choose to be licensed under the terms of the GNU | ||
| * General Public License (GPL) Version 2, available from the file | ||
| * COPYING in the main directory of this source tree, or the | ||
| * OpenIB.org BSD license below: | ||
| * | ||
| * Redistribution and use in source and binary forms, with or | ||
| * without modification, are permitted provided that the following | ||
| * conditions are met: | ||
| * | ||
| * - Redistributions of source code must retain the above | ||
| * copyright notice, this list of conditions and the following | ||
| * disclaimer. | ||
| * | ||
| * - Redistributions in binary form must reproduce the above | ||
| * copyright notice, this list of conditions and the following | ||
| * disclaimer in the documentation and/or other materials | ||
| * provided with the distribution. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | ||
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | ||
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
|
|
||
| #include <linux/kernel.h> | ||
| #include <linux/module.h> | ||
| #include <linux/mlx5/driver.h> | ||
| #include "mlx5_core.h" | ||
| #include "vxlan.h" | ||
|
|
||
| void mlx5e_vxlan_init(struct mlx5e_priv *priv) | ||
| { | ||
| struct mlx5e_vxlan_db *vxlan_db = &priv->vxlan; | ||
|
|
||
| spin_lock_init(&vxlan_db->lock); | ||
| INIT_RADIX_TREE(&vxlan_db->tree, GFP_ATOMIC); | ||
| } | ||
|
|
||
| static int mlx5e_vxlan_core_add_port_cmd(struct mlx5_core_dev *mdev, u16 port) | ||
| { | ||
| struct mlx5_outbox_hdr *hdr; | ||
| int err; | ||
|
|
||
| u32 in[MLX5_ST_SZ_DW(add_vxlan_udp_dport_in)]; | ||
| u32 out[MLX5_ST_SZ_DW(add_vxlan_udp_dport_out)]; | ||
|
|
||
| memset(in, 0, sizeof(in)); | ||
| memset(out, 0, sizeof(out)); | ||
|
|
||
| MLX5_SET(add_vxlan_udp_dport_in, in, opcode, | ||
| MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT); | ||
| MLX5_SET(add_vxlan_udp_dport_in, in, vxlan_udp_port, port); | ||
|
|
||
| err = mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); | ||
| if (err) | ||
| return err; | ||
|
|
||
| hdr = (struct mlx5_outbox_hdr *)out; | ||
| return hdr->status ? -ENOMEM : 0; | ||
| } | ||
|
|
||
| static int mlx5e_vxlan_core_del_port_cmd(struct mlx5_core_dev *mdev, u16 port) | ||
| { | ||
| u32 in[MLX5_ST_SZ_DW(delete_vxlan_udp_dport_in)]; | ||
| u32 out[MLX5_ST_SZ_DW(delete_vxlan_udp_dport_out)]; | ||
|
|
||
| memset(&in, 0, sizeof(in)); | ||
| memset(&out, 0, sizeof(out)); | ||
|
|
||
| MLX5_SET(delete_vxlan_udp_dport_in, in, opcode, | ||
| MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT); | ||
| MLX5_SET(delete_vxlan_udp_dport_in, in, vxlan_udp_port, port); | ||
|
|
||
| return mlx5_cmd_exec_check_status(mdev, in, sizeof(in), out, | ||
| sizeof(out)); | ||
| } | ||
|
|
||
| struct mlx5e_vxlan *mlx5e_vxlan_lookup_port(struct mlx5e_priv *priv, u16 port) | ||
| { | ||
| struct mlx5e_vxlan_db *vxlan_db = &priv->vxlan; | ||
| struct mlx5e_vxlan *vxlan; | ||
|
|
||
| spin_lock(&vxlan_db->lock); | ||
| vxlan = radix_tree_lookup(&vxlan_db->tree, port); | ||
| spin_unlock(&vxlan_db->lock); | ||
|
|
||
| return vxlan; | ||
| } | ||
|
|
||
| int mlx5e_vxlan_add_port(struct mlx5e_priv *priv, u16 port) | ||
| { | ||
| struct mlx5e_vxlan_db *vxlan_db = &priv->vxlan; | ||
| struct mlx5e_vxlan *vxlan; | ||
| int err; | ||
|
|
||
| err = mlx5e_vxlan_core_add_port_cmd(priv->mdev, port); | ||
| if (err) | ||
| return err; | ||
|
|
||
| vxlan = kzalloc(sizeof(*vxlan), GFP_KERNEL); | ||
| if (!vxlan) { | ||
| err = -ENOMEM; | ||
| goto err_delete_port; | ||
| } | ||
|
|
||
| vxlan->udp_port = port; | ||
|
|
||
| spin_lock_irq(&vxlan_db->lock); | ||
| err = radix_tree_insert(&vxlan_db->tree, vxlan->udp_port, vxlan); | ||
| spin_unlock_irq(&vxlan_db->lock); | ||
| if (err) | ||
| goto err_free; | ||
|
|
||
| return 0; | ||
|
|
||
| err_free: | ||
| kfree(vxlan); | ||
| err_delete_port: | ||
| mlx5e_vxlan_core_del_port_cmd(priv->mdev, port); | ||
| return err; | ||
| } | ||
|
|
||
| static void __mlx5e_vxlan_core_del_port(struct mlx5e_priv *priv, u16 port) | ||
| { | ||
| struct mlx5e_vxlan_db *vxlan_db = &priv->vxlan; | ||
| struct mlx5e_vxlan *vxlan; | ||
|
|
||
| spin_lock_irq(&vxlan_db->lock); | ||
| vxlan = radix_tree_delete(&vxlan_db->tree, port); | ||
| spin_unlock_irq(&vxlan_db->lock); | ||
|
|
||
| if (!vxlan) | ||
| return; | ||
|
|
||
| mlx5e_vxlan_core_del_port_cmd(priv->mdev, vxlan->udp_port); | ||
|
|
||
| kfree(vxlan); | ||
| } | ||
|
|
||
| void mlx5e_vxlan_del_port(struct mlx5e_priv *priv, u16 port) | ||
| { | ||
| if (!mlx5e_vxlan_lookup_port(priv, port)) | ||
| return; | ||
|
|
||
| __mlx5e_vxlan_core_del_port(priv, port); | ||
| } | ||
|
|
||
| void mlx5e_vxlan_cleanup(struct mlx5e_priv *priv) | ||
| { | ||
| struct mlx5e_vxlan_db *vxlan_db = &priv->vxlan; | ||
| struct mlx5e_vxlan *vxlan; | ||
| unsigned int port = 0; | ||
|
|
||
| spin_lock_irq(&vxlan_db->lock); | ||
| while (radix_tree_gang_lookup(&vxlan_db->tree, (void **)&vxlan, port, 1)) { | ||
| port = vxlan->udp_port; | ||
| spin_unlock_irq(&vxlan_db->lock); | ||
| __mlx5e_vxlan_core_del_port(priv, (u16)port); | ||
| spin_lock_irq(&vxlan_db->lock); | ||
| } | ||
| spin_unlock_irq(&vxlan_db->lock); | ||
| } |
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