/*
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* Copyright (c) 2018 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/netdevice.h>
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#include <net/ipv6.h>
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#include "en_accel/tls.h"
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#include "accel/tls.h"
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static void mlx5e_tls_set_ipv4_flow(void *flow, struct sock *sk)
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{
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struct inet_sock *inet = inet_sk(sk);
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MLX5_SET(tls_flow, flow, ipv6, 0);
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memcpy(MLX5_ADDR_OF(tls_flow, flow, dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
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&inet->inet_daddr, MLX5_FLD_SZ_BYTES(ipv4_layout, ipv4));
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memcpy(MLX5_ADDR_OF(tls_flow, flow, src_ipv4_src_ipv6.ipv4_layout.ipv4),
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&inet->inet_rcv_saddr, MLX5_FLD_SZ_BYTES(ipv4_layout, ipv4));
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}
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#if IS_ENABLED(CONFIG_IPV6)
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static void mlx5e_tls_set_ipv6_flow(void *flow, struct sock *sk)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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MLX5_SET(tls_flow, flow, ipv6, 1);
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memcpy(MLX5_ADDR_OF(tls_flow, flow, dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
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&sk->sk_v6_daddr, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
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memcpy(MLX5_ADDR_OF(tls_flow, flow, src_ipv4_src_ipv6.ipv6_layout.ipv6),
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&np->saddr, MLX5_FLD_SZ_BYTES(ipv6_layout, ipv6));
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}
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#endif
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static void mlx5e_tls_set_flow_tcp_ports(void *flow, struct sock *sk)
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{
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struct inet_sock *inet = inet_sk(sk);
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memcpy(MLX5_ADDR_OF(tls_flow, flow, src_port), &inet->inet_sport,
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MLX5_FLD_SZ_BYTES(tls_flow, src_port));
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memcpy(MLX5_ADDR_OF(tls_flow, flow, dst_port), &inet->inet_dport,
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MLX5_FLD_SZ_BYTES(tls_flow, dst_port));
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}
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static int mlx5e_tls_set_flow(void *flow, struct sock *sk, u32 caps)
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{
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switch (sk->sk_family) {
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case AF_INET:
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mlx5e_tls_set_ipv4_flow(flow, sk);
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break;
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#if IS_ENABLED(CONFIG_IPV6)
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case AF_INET6:
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if (!sk->sk_ipv6only &&
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ipv6_addr_type(&sk->sk_v6_daddr) == IPV6_ADDR_MAPPED) {
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mlx5e_tls_set_ipv4_flow(flow, sk);
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break;
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}
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if (!(caps & MLX5_ACCEL_TLS_IPV6))
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goto error_out;
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mlx5e_tls_set_ipv6_flow(flow, sk);
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break;
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#endif
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default:
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goto error_out;
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}
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mlx5e_tls_set_flow_tcp_ports(flow, sk);
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return 0;
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error_out:
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return -EINVAL;
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}
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static int mlx5e_tls_add(struct net_device *netdev, struct sock *sk,
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enum tls_offload_ctx_dir direction,
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struct tls_crypto_info *crypto_info,
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u32 start_offload_tcp_sn)
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{
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struct mlx5e_priv *priv = netdev_priv(netdev);
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struct tls_context *tls_ctx = tls_get_ctx(sk);
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struct mlx5_core_dev *mdev = priv->mdev;
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u32 caps = mlx5_accel_tls_device_caps(mdev);
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int ret = -ENOMEM;
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void *flow;
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u32 swid;
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flow = kzalloc(MLX5_ST_SZ_BYTES(tls_flow), GFP_KERNEL);
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if (!flow)
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return ret;
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ret = mlx5e_tls_set_flow(flow, sk, caps);
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if (ret)
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goto free_flow;
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ret = mlx5_accel_tls_add_flow(mdev, flow, crypto_info,
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start_offload_tcp_sn, &swid,
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direction == TLS_OFFLOAD_CTX_DIR_TX);
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if (ret < 0)
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goto free_flow;
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if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
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struct mlx5e_tls_offload_context_tx *tx_ctx =
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mlx5e_get_tls_tx_context(tls_ctx);
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tx_ctx->swid = htonl(swid);
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tx_ctx->expected_seq = start_offload_tcp_sn;
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} else {
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struct mlx5e_tls_offload_context_rx *rx_ctx =
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mlx5e_get_tls_rx_context(tls_ctx);
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rx_ctx->handle = htonl(swid);
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}
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return 0;
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free_flow:
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kfree(flow);
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return ret;
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}
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static void mlx5e_tls_del(struct net_device *netdev,
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struct tls_context *tls_ctx,
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enum tls_offload_ctx_dir direction)
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{
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struct mlx5e_priv *priv = netdev_priv(netdev);
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unsigned int handle;
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handle = ntohl((direction == TLS_OFFLOAD_CTX_DIR_TX) ?
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mlx5e_get_tls_tx_context(tls_ctx)->swid :
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mlx5e_get_tls_rx_context(tls_ctx)->handle);
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mlx5_accel_tls_del_flow(priv->mdev, handle,
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direction == TLS_OFFLOAD_CTX_DIR_TX);
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}
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static int mlx5e_tls_resync(struct net_device *netdev, struct sock *sk,
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u32 seq, u8 *rcd_sn_data,
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enum tls_offload_ctx_dir direction)
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{
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struct tls_context *tls_ctx = tls_get_ctx(sk);
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struct mlx5e_priv *priv = netdev_priv(netdev);
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struct mlx5e_tls_offload_context_rx *rx_ctx;
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__be64 rcd_sn = *(__be64 *)rcd_sn_data;
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if (WARN_ON_ONCE(direction != TLS_OFFLOAD_CTX_DIR_RX))
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return -EINVAL;
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rx_ctx = mlx5e_get_tls_rx_context(tls_ctx);
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netdev_info(netdev, "resyncing seq %d rcd %lld\n", seq,
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be64_to_cpu(rcd_sn));
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mlx5_accel_tls_resync_rx(priv->mdev, rx_ctx->handle, seq, rcd_sn);
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atomic64_inc(&priv->tls->sw_stats.rx_tls_resync_reply);
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return 0;
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}
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static const struct tlsdev_ops mlx5e_tls_ops = {
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.tls_dev_add = mlx5e_tls_add,
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.tls_dev_del = mlx5e_tls_del,
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.tls_dev_resync = mlx5e_tls_resync,
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};
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void mlx5e_tls_build_netdev(struct mlx5e_priv *priv)
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{
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struct net_device *netdev = priv->netdev;
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u32 caps;
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if (mlx5_accel_is_ktls_device(priv->mdev)) {
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mlx5e_ktls_build_netdev(priv);
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return;
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}
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/* FPGA */
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if (!mlx5_accel_is_tls_device(priv->mdev))
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return;
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caps = mlx5_accel_tls_device_caps(priv->mdev);
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if (caps & MLX5_ACCEL_TLS_TX) {
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netdev->features |= NETIF_F_HW_TLS_TX;
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netdev->hw_features |= NETIF_F_HW_TLS_TX;
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}
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if (caps & MLX5_ACCEL_TLS_RX) {
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netdev->features |= NETIF_F_HW_TLS_RX;
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netdev->hw_features |= NETIF_F_HW_TLS_RX;
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}
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if (!(caps & MLX5_ACCEL_TLS_LRO)) {
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netdev->features &= ~NETIF_F_LRO;
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netdev->hw_features &= ~NETIF_F_LRO;
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}
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netdev->tlsdev_ops = &mlx5e_tls_ops;
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}
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int mlx5e_tls_init(struct mlx5e_priv *priv)
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{
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struct mlx5e_tls *tls;
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if (!mlx5_accel_is_tls_device(priv->mdev))
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return 0;
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tls = kzalloc(sizeof(*tls), GFP_KERNEL);
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if (!tls)
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return -ENOMEM;
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tls->rx_wq = create_singlethread_workqueue("mlx5e_tls_rx");
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if (!tls->rx_wq) {
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kfree(tls);
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return -ENOMEM;
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}
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priv->tls = tls;
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return 0;
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}
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void mlx5e_tls_cleanup(struct mlx5e_priv *priv)
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{
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struct mlx5e_tls *tls = priv->tls;
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if (!tls)
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return;
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destroy_workqueue(tls->rx_wq);
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kfree(tls);
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priv->tls = NULL;
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}
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