cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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fs_helpers.h (4423B)

      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
     41static inline bool mlx5_fs_is_ipsec_flow(const u32 *match_c)
     42{
     43	void *misc_params_c = MLX5_ADDR_OF(fte_match_param, match_c,
     44					   misc_parameters);
     45
     46	return MLX5_GET(fte_match_set_misc, misc_params_c, outer_esp_spi);
     47}
     48
     49static inline bool _mlx5_fs_is_outer_ipproto_flow(const u32 *match_c,
     50						  const u32 *match_v, u8 match)
     51{
     52	const void *headers_c = MLX5_ADDR_OF(fte_match_param, match_c,
     53					     outer_headers);
     54	const void *headers_v = MLX5_ADDR_OF(fte_match_param, match_v,
     55					     outer_headers);
     56
     57	return MLX5_GET(fte_match_set_lyr_2_4, headers_c, ip_protocol) == 0xff &&
     58		MLX5_GET(fte_match_set_lyr_2_4, headers_v, ip_protocol) == match;
     59}
     60
     61static inline bool mlx5_fs_is_outer_tcp_flow(const u32 *match_c,
     62					     const u32 *match_v)
     63{
     64	return _mlx5_fs_is_outer_ipproto_flow(match_c, match_v, IPPROTO_TCP);
     65}
     66
     67static inline bool mlx5_fs_is_outer_udp_flow(const u32 *match_c,
     68					     const u32 *match_v)
     69{
     70	return _mlx5_fs_is_outer_ipproto_flow(match_c, match_v, IPPROTO_UDP);
     71}
     72
     73static inline bool mlx5_fs_is_vxlan_flow(const u32 *match_c)
     74{
     75	void *misc_params_c = MLX5_ADDR_OF(fte_match_param, match_c,
     76					   misc_parameters);
     77
     78	return MLX5_GET(fte_match_set_misc, misc_params_c, vxlan_vni);
     79}
     80
     81static inline bool _mlx5_fs_is_outer_ipv_flow(struct mlx5_core_dev *mdev,
     82					      const u32 *match_c,
     83					      const u32 *match_v, int version)
     84{
     85	int match_ipv = MLX5_CAP_FLOWTABLE_NIC_RX(mdev,
     86						  ft_field_support.outer_ip_version);
     87	const void *headers_c = MLX5_ADDR_OF(fte_match_param, match_c,
     88					     outer_headers);
     89	const void *headers_v = MLX5_ADDR_OF(fte_match_param, match_v,
     90					     outer_headers);
     91
     92	if (!match_ipv) {
     93		u16 ethertype;
     94
     95		switch (version) {
     96		case MLX5_FS_IPV4_VERSION:
     97			ethertype = ETH_P_IP;
     98			break;
     99		case MLX5_FS_IPV6_VERSION:
    100			ethertype = ETH_P_IPV6;
    101			break;
    102		default:
    103			return false;
    104		}
    105
    106		return MLX5_GET(fte_match_set_lyr_2_4, headers_c,
    107				ethertype) == 0xffff &&
    108			MLX5_GET(fte_match_set_lyr_2_4, headers_v,
    109				 ethertype) == ethertype;
    110	}
    111
    112	return MLX5_GET(fte_match_set_lyr_2_4, headers_c,
    113			ip_version) == 0xf &&
    114		MLX5_GET(fte_match_set_lyr_2_4, headers_v,
    115			 ip_version) == version;
    116}
    117
    118static inline bool
    119mlx5_fs_is_outer_ipv4_flow(struct mlx5_core_dev *mdev, const u32 *match_c,
    120			   const u32 *match_v)
    121{
    122	return _mlx5_fs_is_outer_ipv_flow(mdev, match_c, match_v,
    123					  MLX5_FS_IPV4_VERSION);
    124}
    125
    126static inline bool
    127mlx5_fs_is_outer_ipv6_flow(struct mlx5_core_dev *mdev, const u32 *match_c,
    128			   const u32 *match_v)
    129{
    130	return _mlx5_fs_is_outer_ipv_flow(mdev, match_c, match_v,
    131					  MLX5_FS_IPV6_VERSION);
    132}
    133
    134static inline bool mlx5_fs_is_outer_ipsec_flow(const u32 *match_c)
    135{
    136	void *misc_params_c =
    137			MLX5_ADDR_OF(fte_match_param, match_c, misc_parameters);
    138
    139	return MLX5_GET(fte_match_set_misc, misc_params_c, outer_esp_spi);
    140}
    141
    142#endif