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/*
* 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)
{
u32 in[MLX5_ST_SZ_DW(add_vxlan_udp_dport_in)] = {0};
u32 out[MLX5_ST_SZ_DW(add_vxlan_udp_dport_out)] = {0};
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);
return mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out));
}
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)] = {0};
u32 out[MLX5_ST_SZ_DW(delete_vxlan_udp_dport_out)] = {0};
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(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_bh(&vxlan_db->lock);
vxlan = radix_tree_lookup(&vxlan_db->tree, port);
spin_unlock_bh(&vxlan_db->lock);
return vxlan;
}
static void mlx5e_vxlan_add_port(struct work_struct *work)
{
struct mlx5e_vxlan_work *vxlan_work =
container_of(work, struct mlx5e_vxlan_work, work);
struct mlx5e_priv *priv = vxlan_work->priv;
struct mlx5e_vxlan_db *vxlan_db = &priv->vxlan;
u16 port = vxlan_work->port;
struct mlx5e_vxlan *vxlan;
int err;
mutex_lock(&priv->state_lock);
vxlan = mlx5e_vxlan_lookup_port(priv, port);
if (vxlan) {
atomic_inc(&vxlan->refcount);
goto free_work;
}
if (mlx5e_vxlan_core_add_port_cmd(priv->mdev, port))
goto free_work;
vxlan = kzalloc(sizeof(*vxlan), GFP_KERNEL);
if (!vxlan)
goto err_delete_port;
vxlan->udp_port = port;
atomic_set(&vxlan->refcount, 1);
spin_lock_bh(&vxlan_db->lock);
err = radix_tree_insert(&vxlan_db->tree, vxlan->udp_port, vxlan);
spin_unlock_bh(&vxlan_db->lock);
if (err)
goto err_free;
goto free_work;
err_free:
kfree(vxlan);
err_delete_port:
mlx5e_vxlan_core_del_port_cmd(priv->mdev, port);
free_work:
mutex_unlock(&priv->state_lock);
kfree(vxlan_work);
}
static void mlx5e_vxlan_del_port(struct work_struct *work)
{
struct mlx5e_vxlan_work *vxlan_work =
container_of(work, struct mlx5e_vxlan_work, work);
struct mlx5e_priv *priv = vxlan_work->priv;
struct mlx5e_vxlan_db *vxlan_db = &priv->vxlan;
u16 port = vxlan_work->port;
struct mlx5e_vxlan *vxlan;
bool remove = false;
mutex_lock(&priv->state_lock);
spin_lock_bh(&vxlan_db->lock);
vxlan = radix_tree_lookup(&vxlan_db->tree, port);
if (!vxlan)
goto out_unlock;
if (atomic_dec_and_test(&vxlan->refcount)) {
radix_tree_delete(&vxlan_db->tree, port);
remove = true;
}
out_unlock:
spin_unlock_bh(&vxlan_db->lock);
if (remove) {
mlx5e_vxlan_core_del_port_cmd(priv->mdev, port);
kfree(vxlan);
}
mutex_unlock(&priv->state_lock);
kfree(vxlan_work);
}
void mlx5e_vxlan_queue_work(struct mlx5e_priv *priv, sa_family_t sa_family,
u16 port, int add)
{
struct mlx5e_vxlan_work *vxlan_work;
vxlan_work = kmalloc(sizeof(*vxlan_work), GFP_ATOMIC);
if (!vxlan_work)
return;
if (add)
INIT_WORK(&vxlan_work->work, mlx5e_vxlan_add_port);
else
INIT_WORK(&vxlan_work->work, mlx5e_vxlan_del_port);
vxlan_work->priv = priv;
vxlan_work->port = port;
vxlan_work->sa_family = sa_family;
queue_work(priv->wq, &vxlan_work->work);
}
void mlx5e_vxlan_cleanup(struct mlx5e_priv *priv)
{
struct mlx5e_vxlan_db *vxlan_db = &priv->vxlan;
struct mlx5e_vxlan *vxlan;
unsigned int port = 0;
/* Lockless since we are the only radix-tree consumers, wq is disabled */
while (radix_tree_gang_lookup(&vxlan_db->tree, (void **)&vxlan, port, 1)) {
port = vxlan->udp_port;
radix_tree_delete(&vxlan_db->tree, port);
mlx5e_vxlan_core_del_port_cmd(priv->mdev, port);
kfree(vxlan);
}
}
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