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/*
* Copyright (c) 2017 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_IPSEC_RXTX_H__
#define __MLX5E_IPSEC_RXTX_H__
#include <linux/skbuff.h>
#include <net/xfrm.h>
#include "en.h"
#include "en/txrx.h"
/* Bit31: IPsec marker, Bit30-24: IPsec syndrome, Bit23-0: IPsec obj id */
#define MLX5_IPSEC_METADATA_MARKER(metadata) (((metadata) >> 31) & 0x1)
#define MLX5_IPSEC_METADATA_SYNDROM(metadata) (((metadata) >> 24) & GENMASK(6, 0))
#define MLX5_IPSEC_METADATA_HANDLE(metadata) ((metadata) & GENMASK(23, 0))
struct mlx5e_accel_tx_ipsec_state {
struct xfrm_offload *xo;
struct xfrm_state *x;
u32 tailen;
u32 plen;
};
#ifdef CONFIG_MLX5_EN_IPSEC
struct sk_buff *mlx5e_ipsec_handle_rx_skb(struct net_device *netdev,
struct sk_buff *skb, u32 *cqe_bcnt);
void mlx5e_ipsec_inverse_table_init(void);
void mlx5e_ipsec_set_iv_esn(struct sk_buff *skb, struct xfrm_state *x,
struct xfrm_offload *xo);
void mlx5e_ipsec_set_iv(struct sk_buff *skb, struct xfrm_state *x,
struct xfrm_offload *xo);
bool mlx5e_ipsec_handle_tx_skb(struct net_device *netdev,
struct sk_buff *skb,
struct mlx5e_accel_tx_ipsec_state *ipsec_st);
void mlx5e_ipsec_handle_tx_wqe(struct mlx5e_tx_wqe *wqe,
struct mlx5e_accel_tx_ipsec_state *ipsec_st,
struct mlx5_wqe_inline_seg *inlseg);
void mlx5e_ipsec_offload_handle_rx_skb(struct net_device *netdev,
struct sk_buff *skb,
struct mlx5_cqe64 *cqe);
static inline unsigned int mlx5e_ipsec_tx_ids_len(struct mlx5e_accel_tx_ipsec_state *ipsec_st)
{
return ipsec_st->tailen;
}
static inline bool mlx5_ipsec_is_rx_flow(struct mlx5_cqe64 *cqe)
{
return MLX5_IPSEC_METADATA_MARKER(be32_to_cpu(cqe->ft_metadata));
}
static inline bool mlx5e_ipsec_is_tx_flow(struct mlx5e_accel_tx_ipsec_state *ipsec_st)
{
return ipsec_st->x;
}
static inline bool mlx5e_ipsec_eseg_meta(struct mlx5_wqe_eth_seg *eseg)
{
return eseg->flow_table_metadata & cpu_to_be32(MLX5_ETH_WQE_FT_META_IPSEC);
}
void mlx5e_ipsec_tx_build_eseg(struct mlx5e_priv *priv, struct sk_buff *skb,
struct mlx5_wqe_eth_seg *eseg);
static inline netdev_features_t
mlx5e_ipsec_feature_check(struct sk_buff *skb, netdev_features_t features)
{
struct xfrm_offload *xo = xfrm_offload(skb);
struct sec_path *sp = skb_sec_path(skb);
if (sp && sp->len && xo) {
struct xfrm_state *x = sp->xvec[0];
if (!x || !x->xso.offload_handle)
goto out_disable;
if (xo->inner_ipproto) {
/* Cannot support tunnel packet over IPsec tunnel mode
* because we cannot offload three IP header csum
*/
if (x->props.mode == XFRM_MODE_TUNNEL)
goto out_disable;
/* Only support UDP or TCP L4 checksum */
if (xo->inner_ipproto != IPPROTO_UDP &&
xo->inner_ipproto != IPPROTO_TCP)
goto out_disable;
}
return features;
}
/* Disable CSUM and GSO for software IPsec */
out_disable:
return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
}
static inline bool
mlx5e_ipsec_txwqe_build_eseg_csum(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5_wqe_eth_seg *eseg)
{
struct xfrm_offload *xo = xfrm_offload(skb);
if (!mlx5e_ipsec_eseg_meta(eseg))
return false;
eseg->cs_flags = MLX5_ETH_WQE_L3_CSUM;
if (xo->inner_ipproto) {
eseg->cs_flags |= MLX5_ETH_WQE_L4_INNER_CSUM | MLX5_ETH_WQE_L3_INNER_CSUM;
} else if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
eseg->cs_flags |= MLX5_ETH_WQE_L4_CSUM;
sq->stats->csum_partial_inner++;
}
return true;
}
#else
static inline
void mlx5e_ipsec_offload_handle_rx_skb(struct net_device *netdev,
struct sk_buff *skb,
struct mlx5_cqe64 *cqe)
{}
static inline bool mlx5e_ipsec_eseg_meta(struct mlx5_wqe_eth_seg *eseg)
{
return false;
}
static inline bool mlx5_ipsec_is_rx_flow(struct mlx5_cqe64 *cqe) { return false; }
static inline netdev_features_t
mlx5e_ipsec_feature_check(struct sk_buff *skb, netdev_features_t features)
{ return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); }
static inline bool
mlx5e_ipsec_txwqe_build_eseg_csum(struct mlx5e_txqsq *sq, struct sk_buff *skb,
struct mlx5_wqe_eth_seg *eseg)
{
return false;
}
#endif /* CONFIG_MLX5_EN_IPSEC */
#endif /* __MLX5E_IPSEC_RXTX_H__ */
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