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/*
* 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.
*
*/
#ifndef __MLX5E_EN_ACCEL_H__
#define __MLX5E_EN_ACCEL_H__
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include "en_accel/ipsec_rxtx.h"
#include "en_accel/tls.h"
#include "en_accel/tls_rxtx.h"
#include "en.h"
#include "en/txrx.h"
#if IS_ENABLED(CONFIG_GENEVE)
#include <net/geneve.h>
static inline bool mlx5_geneve_tx_allowed(struct mlx5_core_dev *mdev)
{
return mlx5_tx_swp_supported(mdev);
}
static inline void
mlx5e_tx_tunnel_accel(struct sk_buff *skb, struct mlx5_wqe_eth_seg *eseg, u16 ihs)
{
struct mlx5e_swp_spec swp_spec = {};
unsigned int offset = 0;
__be16 l3_proto;
u8 l4_proto;
l3_proto = vlan_get_protocol(skb);
switch (l3_proto) {
case htons(ETH_P_IP):
l4_proto = ip_hdr(skb)->protocol;
break;
case htons(ETH_P_IPV6):
l4_proto = ipv6_find_hdr(skb, &offset, -1, NULL, NULL);
break;
default:
return;
}
if (l4_proto != IPPROTO_UDP ||
udp_hdr(skb)->dest != cpu_to_be16(GENEVE_UDP_PORT))
return;
swp_spec.l3_proto = l3_proto;
swp_spec.l4_proto = l4_proto;
swp_spec.is_tun = true;
if (inner_ip_hdr(skb)->version == 6) {
swp_spec.tun_l3_proto = htons(ETH_P_IPV6);
swp_spec.tun_l4_proto = inner_ipv6_hdr(skb)->nexthdr;
} else {
swp_spec.tun_l3_proto = htons(ETH_P_IP);
swp_spec.tun_l4_proto = inner_ip_hdr(skb)->protocol;
}
mlx5e_set_eseg_swp(skb, eseg, &swp_spec);
if (skb_vlan_tag_present(skb) && ihs)
mlx5e_eseg_swp_offsets_add_vlan(eseg);
}
#else
static inline bool mlx5_geneve_tx_allowed(struct mlx5_core_dev *mdev)
{
return false;
}
#endif /* CONFIG_GENEVE */
static inline void
mlx5e_udp_gso_handle_tx_skb(struct sk_buff *skb)
{
int payload_len = skb_shinfo(skb)->gso_size + sizeof(struct udphdr);
udp_hdr(skb)->len = htons(payload_len);
}
struct mlx5e_accel_tx_state {
#ifdef CONFIG_MLX5_EN_TLS
struct mlx5e_accel_tx_tls_state tls;
#endif
#ifdef CONFIG_MLX5_EN_IPSEC
struct mlx5e_accel_tx_ipsec_state ipsec;
#endif
};
static inline bool mlx5e_accel_tx_begin(struct net_device *dev,
struct mlx5e_txqsq *sq,
struct sk_buff *skb,
struct mlx5e_accel_tx_state *state)
{
if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4)
mlx5e_udp_gso_handle_tx_skb(skb);
#ifdef CONFIG_MLX5_EN_TLS
/* May send SKBs and WQEs. */
if (mlx5e_tls_skb_offloaded(skb))
if (unlikely(!mlx5e_tls_handle_tx_skb(dev, sq, skb, &state->tls)))
return false;
#endif
#ifdef CONFIG_MLX5_EN_IPSEC
if (test_bit(MLX5E_SQ_STATE_IPSEC, &sq->state) && xfrm_offload(skb)) {
if (unlikely(!mlx5e_ipsec_handle_tx_skb(dev, skb, &state->ipsec)))
return false;
}
#endif
return true;
}
static inline bool mlx5e_accel_tx_is_ipsec_flow(struct mlx5e_accel_tx_state *state)
{
#ifdef CONFIG_MLX5_EN_IPSEC
return mlx5e_ipsec_is_tx_flow(&state->ipsec);
#else
return false;
#endif
}
static inline unsigned int mlx5e_accel_tx_ids_len(struct mlx5e_txqsq *sq,
struct mlx5e_accel_tx_state *state)
{
#ifdef CONFIG_MLX5_EN_IPSEC
if (test_bit(MLX5E_SQ_STATE_IPSEC, &sq->state))
return mlx5e_ipsec_tx_ids_len(&state->ipsec);
#endif
return 0;
}
/* Part of the eseg touched by TX offloads */
#define MLX5E_ACCEL_ESEG_LEN offsetof(struct mlx5_wqe_eth_seg, mss)
static inline void mlx5e_accel_tx_eseg(struct mlx5e_priv *priv,
struct sk_buff *skb,
struct mlx5_wqe_eth_seg *eseg, u16 ihs)
{
#ifdef CONFIG_MLX5_EN_IPSEC
if (xfrm_offload(skb))
mlx5e_ipsec_tx_build_eseg(priv, skb, eseg);
#endif
#if IS_ENABLED(CONFIG_GENEVE)
if (skb->encapsulation && skb->ip_summed == CHECKSUM_PARTIAL)
mlx5e_tx_tunnel_accel(skb, eseg, ihs);
#endif
}
static inline void mlx5e_accel_tx_finish(struct mlx5e_txqsq *sq,
struct mlx5e_tx_wqe *wqe,
struct mlx5e_accel_tx_state *state,
struct mlx5_wqe_inline_seg *inlseg)
{
#ifdef CONFIG_MLX5_EN_TLS
mlx5e_tls_handle_tx_wqe(&wqe->ctrl, &state->tls);
#endif
#ifdef CONFIG_MLX5_EN_IPSEC
if (test_bit(MLX5E_SQ_STATE_IPSEC, &sq->state) &&
state->ipsec.xo && state->ipsec.tailen)
mlx5e_ipsec_handle_tx_wqe(wqe, &state->ipsec, inlseg);
#endif
}
static inline int mlx5e_accel_init_rx(struct mlx5e_priv *priv)
{
return mlx5e_ktls_init_rx(priv);
}
static inline void mlx5e_accel_cleanup_rx(struct mlx5e_priv *priv)
{
mlx5e_ktls_cleanup_rx(priv);
}
#endif /* __MLX5E_EN_ACCEL_H__ */
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