include/linux/mlx5/fs_helpers.h

   1 /*
   2  * Copyright (c) 2018, 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 #ifndef _MLX5_FS_HELPERS_
  34 #define _MLX5_FS_HELPERS_
  35
  36 #include <linux/mlx5/mlx5_ifc.h>
  37
  38 #define MLX5_FS_IPV4_VERSION 4
  39 #define MLX5_FS_IPV6_VERSION 6
  40
  41 static inline bool _mlx5_fs_is_outer_ipv_flow(struct mlx5_core_dev *mdev,
  42                                               const u32 *match_c,
  43                                               const u32 *match_v, int version)
  44 {
  45         int match_ipv = MLX5_CAP_FLOWTABLE_NIC_RX(mdev,
  46                                                   ft_field_support.outer_ip_version);
  47         const void *headers_c = MLX5_ADDR_OF(fte_match_param, match_c,
  48                                              outer_headers);
  49         const void *headers_v = MLX5_ADDR_OF(fte_match_param, match_v,
  50                                              outer_headers);
  51
  52         if (!match_ipv) {
  53                 u16 ethertype;
  54
  55                 switch (version) {
  56                 case MLX5_FS_IPV4_VERSION:
  57                         ethertype = ETH_P_IP;
  58                         break;
  59                 case MLX5_FS_IPV6_VERSION:
  60                         ethertype = ETH_P_IPV6;
  61                         break;
  62                 default:
  63                         return false;
  64                 }
  65
  66                 return MLX5_GET(fte_match_set_lyr_2_4, headers_c,
  67                                 ethertype) == 0xffff &&
  68                         MLX5_GET(fte_match_set_lyr_2_4, headers_v,
  69                                  ethertype) == ethertype;
  70         }
  71
  72         return MLX5_GET(fte_match_set_lyr_2_4, headers_c,
  73                         ip_version) == 0xf &&
  74                 MLX5_GET(fte_match_set_lyr_2_4, headers_v,
  75                          ip_version) == version;
  76 }
  77
  78 static inline bool
  79 mlx5_fs_is_outer_ipv4_flow(struct mlx5_core_dev *mdev, const u32 *match_c,
  80                            const u32 *match_v)
  81 {
  82         return _mlx5_fs_is_outer_ipv_flow(mdev, match_c, match_v,
  83                                           MLX5_FS_IPV4_VERSION);
  84 }
  85
  86 static inline bool
  87 mlx5_fs_is_outer_ipv6_flow(struct mlx5_core_dev *mdev, const u32 *match_c,
  88                            const u32 *match_v)
  89 {
  90         return _mlx5_fs_is_outer_ipv_flow(mdev, match_c, match_v,
  91                                           MLX5_FS_IPV6_VERSION);
  92 }
  93
  94 #endif