LXR linux/drivers/net/ethernet/mellanox/mlx5/core/en

   1/*
   2 * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 *
  32 */
  33
  34#ifndef __MLX5E_IPSEC_H__
  35#define __MLX5E_IPSEC_H__
  36
  37#ifdef CONFIG_MLX5_EN_IPSEC
  38
  39#include <linux/mlx5/device.h>
  40#include <net/xfrm.h>
  41#include <linux/idr.h>
  42
  43#include "accel/ipsec.h"
  44
  45#define MLX5E_IPSEC_SADB_RX_BITS 10
  46#define MLX5E_IPSEC_ESN_SCOPE_MID 0x80000000L
  47
  48struct mlx5e_priv;
  49
  50struct mlx5e_ipsec_sw_stats {
  51        atomic64_t ipsec_rx_drop_sp_alloc;
  52        atomic64_t ipsec_rx_drop_sadb_miss;
  53        atomic64_t ipsec_rx_drop_syndrome;
  54        atomic64_t ipsec_tx_drop_bundle;
  55        atomic64_t ipsec_tx_drop_no_state;
  56        atomic64_t ipsec_tx_drop_not_ip;
  57        atomic64_t ipsec_tx_drop_trailer;
  58        atomic64_t ipsec_tx_drop_metadata;
  59};
  60
  61struct mlx5e_ipsec_stats {
  62        u64 ipsec_dec_in_packets;
  63        u64 ipsec_dec_out_packets;
  64        u64 ipsec_dec_bypass_packets;
  65        u64 ipsec_enc_in_packets;
  66        u64 ipsec_enc_out_packets;
  67        u64 ipsec_enc_bypass_packets;
  68        u64 ipsec_dec_drop_packets;
  69        u64 ipsec_dec_auth_fail_packets;
  70        u64 ipsec_enc_drop_packets;
  71        u64 ipsec_add_sa_success;
  72        u64 ipsec_add_sa_fail;
  73        u64 ipsec_del_sa_success;
  74        u64 ipsec_del_sa_fail;
  75        u64 ipsec_cmd_drop;
  76};
  77
  78struct mlx5e_accel_fs_esp;
  79struct mlx5e_ipsec_tx;
  80
  81struct mlx5e_ipsec {
  82        struct mlx5e_priv *en_priv;
  83        DECLARE_HASHTABLE(sadb_rx, MLX5E_IPSEC_SADB_RX_BITS);
  84        bool no_trailer;
  85        spinlock_t sadb_rx_lock; /* Protects sadb_rx and halloc */
  86        struct ida halloc;
  87        struct mlx5e_ipsec_sw_stats sw_stats;
  88        struct mlx5e_ipsec_stats stats;
  89        struct workqueue_struct *wq;
  90        struct mlx5e_accel_fs_esp *rx_fs;
  91        struct mlx5e_ipsec_tx *tx_fs;
  92};
  93
  94struct mlx5e_ipsec_esn_state {
  95        u32 esn;
  96        u8 trigger: 1;
  97        u8 overlap: 1;
  98};
  99
 100struct mlx5e_ipsec_rule {
 101        struct mlx5_flow_handle *rule;
 102        struct mlx5_modify_hdr *set_modify_hdr;
 103};
 104
 105struct mlx5e_ipsec_sa_entry {
 106        struct hlist_node hlist; /* Item in SADB_RX hashtable */
 107        struct mlx5e_ipsec_esn_state esn_state;
 108        unsigned int handle; /* Handle in SADB_RX */
 109        struct xfrm_state *x;
 110        struct mlx5e_ipsec *ipsec;
 111        struct mlx5_accel_esp_xfrm *xfrm;
 112        void *hw_context;
 113        void (*set_iv_op)(struct sk_buff *skb, struct xfrm_state *x,
 114                          struct xfrm_offload *xo);
 115        u32 ipsec_obj_id;
 116        struct mlx5e_ipsec_rule ipsec_rule;
 117};
 118
 119void mlx5e_ipsec_build_inverse_table(void);
 120int mlx5e_ipsec_init(struct mlx5e_priv *priv);
 121void mlx5e_ipsec_cleanup(struct mlx5e_priv *priv);
 122void mlx5e_ipsec_build_netdev(struct mlx5e_priv *priv);
 123
 124struct xfrm_state *mlx5e_ipsec_sadb_rx_lookup(struct mlx5e_ipsec *dev,
 125                                              unsigned int handle);
 126
 127#else
 128
 129static inline void mlx5e_ipsec_build_inverse_table(void)
 130{
 131}
 132
 133static inline int mlx5e_ipsec_init(struct mlx5e_priv *priv)
 134{
 135        return 0;
 136}
 137
 138static inline void mlx5e_ipsec_cleanup(struct mlx5e_priv *priv)
 139{
 140}
 141
 142static inline void mlx5e_ipsec_build_netdev(struct mlx5e_priv *priv)
 143{
 144}
 145
 146#endif
 147
 148#endif  /* __MLX5E_IPSEC_H__ */
 149