/*
* Copyright (c) 2018 Mellanox Technologies. 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/netdevice.h>
#include <net/ipv6.h>
#include "en_accel/tls.h"
#include "accel/tls.h"
static void mlx5e_tls_set_ipv4_flow(void *flow, struct sock *sk)
{
struct inet_sock *inet = inet_sk(sk);
MLX5_SET(tls_flow, flow, ipv6, 0);
memcpy(MLX5_ADDR_OF(tls_flow, flow, dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
&inet->inet_daddr, MLX5_FLD_SZ_BYTES(ipv4_layout, ipv4));
memcpy(MLX5_ADDR_OF(tls_flow, flow, src_ipv4_src_ipv6.ipv4_layout.ipv4),
&inet->inet_rcv_saddr, MLX5_FLD_SZ_BYTES(ipv4_layout, ipv4));
}
#if IS_ENABLED(CONFIG_IPV6)
static void mlx5e_tls_set_ipv6_flow(void *flow, struct sock *sk)
{
struct ipv6_pinfo *np = inet6_sk(sk);
MLX5_SET(tls_flow, flow, ipv6, 1);
memcpy(MLX5_ADDR_OF(tls_flow, flow, dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
&sk->sk_v6_daddr, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
memcpy(MLX5_ADDR_OF(tls_flow, flow, src_ipv4_src_ipv6.ipv6_layout.ipv6),
&np->saddr, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
}
#endif
static void mlx5e_tls_set_flow_tcp_ports(void *flow, struct sock *sk)
{
struct inet_sock *inet = inet_sk(sk);
memcpy(MLX5_ADDR_OF(tls_flow, flow, src_port), &inet->inet_sport,
MLX5_FLD_SZ_BYTES(tls_flow, src_port));
memcpy(MLX5_ADDR_OF(tls_flow, flow, dst_port), &inet->inet_dport,
MLX5_FLD_SZ_BYTES(tls_flow, dst_port));
}
static int mlx5e_tls_set_flow(void *flow, struct sock *sk, u32 caps)
{
switch (sk->sk_family) {
case AF_INET:
mlx5e_tls_set_ipv4_flow(flow, sk);
break;
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
if (!sk->sk_ipv6only &&
ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) {
mlx5e_tls_set_ipv4_flow(flow, sk);
break;
}
if (!(caps & MLX5_ACCEL_TLS_IPV6))
goto error_out;
mlx5e_tls_set_ipv6_flow(flow, sk);
break;
#endif
default:
goto error_out;
}
mlx5e_tls_set_flow_tcp_ports(flow, sk);
return 0;
error_out:
return -EINVAL;
}
static int mlx5e_tls_add(struct net_device *netdev, struct sock *sk,
enum tls_offload_ctx_dir direction,
struct tls_crypto_info *crypto_info,
u32 start_offload_tcp_sn)
{
struct mlx5e_priv *priv = netdev_priv(netdev);
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct mlx5_core_dev *mdev = priv->mdev;
u32 caps = mlx5_accel_tls_device_caps(mdev);
int ret = -ENOMEM;
void *flow;
u32 swid;
flow = kzalloc(MLX5_ST_SZ_BYTES(tls_flow), GFP_KERNEL);
if (!flow)
return ret;
ret = mlx5e_tls_set_flow(flow, sk, caps);
if (ret)
goto free_flow;
ret = mlx5_accel_tls_add_flow(mdev, flow, crypto_info,
start_offload_tcp_sn, &swid,
direction == TLS_OFFLOAD_CTX_DIR_TX);
if (ret < 0)
goto free_flow;
if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
struct mlx5e_tls_offload_context_tx *tx_ctx =
mlx5e_get_tls_tx_context(tls_ctx);
tx_ctx->swid = htonl(swid);
tx_ctx->expected_seq = start_offload_tcp_sn;
} else {
struct mlx5e_tls_offload_context_rx *rx_ctx =
mlx5e_get_tls_rx_context(tls_ctx);
rx_ctx->handle = htonl(swid);
}
return 0;
free_flow:
kfree(flow);
return ret;
}
static void mlx5e_tls_del(struct net_device *netdev,
struct tls_context *tls_ctx,
enum tls_offload_ctx_dir direction)
{
struct mlx5e_priv *priv = netdev_priv(netdev);
unsigned int handle;
handle = ntohl((direction == TLS_OFFLOAD_CTX_DIR_TX) ?
mlx5e_get_tls_tx_context(tls_ctx)->swid :
mlx5e_get_tls_rx_context(tls_ctx)->handle);
mlx5_accel_tls_del_flow(priv->mdev, handle,
direction == TLS_OFFLOAD_CTX_DIR_TX);
}
static void mlx5e_tls_resync_rx(struct net_device *netdev, struct sock *sk,
u32 seq, u64 rcd_sn)
{
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct mlx5e_priv *priv = netdev_priv(netdev);
struct mlx5e_tls_offload_context_rx *rx_ctx;
rx_ctx = mlx5e_get_tls_rx_context(tls_ctx);
netdev_info(netdev, "resyncing seq %d rcd %lld\n", seq,
be64_to_cpu(rcd_sn));
mlx5_accel_tls_resync_rx(priv->mdev, rx_ctx->handle, seq, rcd_sn);
atomic64_inc(&priv->tls->sw_stats.rx_tls_resync_reply);
}
static const struct tlsdev_ops mlx5e_tls_ops = {
.tls_dev_add = mlx5e_tls_add,
.tls_dev_del = mlx5e_tls_del,
.tls_dev_resync_rx = mlx5e_tls_resync_rx,
};
void mlx5e_tls_build_netdev(struct mlx5e_priv *priv)
{
struct net_device *netdev = priv->netdev;
u32 caps;
if (!mlx5_accel_is_tls_device(priv->mdev))
return;
caps = mlx5_accel_tls_device_caps(priv->mdev);
if (caps & MLX5_ACCEL_TLS_TX) {
netdev->features |= NETIF_F_HW_TLS_TX;
netdev->hw_features |= NETIF_F_HW_TLS_TX;
}
if (caps & MLX5_ACCEL_TLS_RX) {
netdev->features |= NETIF_F_HW_TLS_RX;
netdev->hw_features |= NETIF_F_HW_TLS_RX;
}
if (!(caps & MLX5_ACCEL_TLS_LRO)) {
netdev->features &= ~NETIF_F_LRO;
netdev->hw_features &= ~NETIF_F_LRO;
}
netdev->tlsdev_ops = &mlx5e_tls_ops;
}
int mlx5e_tls_init(struct mlx5e_priv *priv)
{
struct mlx5e_tls *tls = kzalloc(sizeof(*tls), GFP_KERNEL);
if (!tls)
return -ENOMEM;
priv->tls = tls;
return 0;
}
void mlx5e_tls_cleanup(struct mlx5e_priv *priv)
{
struct mlx5e_tls *tls = priv->tls;
if (!tls)
return;
kfree(tls);
priv->tls = NULL;
}