d6c4f0298c
The current code has one layer that executed FPGA commands and the Ethernet part directly used this code. Since downstream patches introduces support for IPSec in mlx5_ib, we need to provide some abstractions. This patch refactors the accel code into one layer that creates a software IPSec transformation and another one which creates the actual hardware context. The internal command implementation is now hidden in the FPGA core layer. The code also adds the ability to share FPGA hardware contexts. If two contexts are the same, only a reference count is taken. Signed-off-by: Aviad Yehezkel <aviadye@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*
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* Copyright (c) 2018 Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#ifndef __MLX5_ACCEL_H__
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#define __MLX5_ACCEL_H__
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#include <linux/mlx5/driver.h>
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enum mlx5_accel_esp_aes_gcm_keymat_iv_algo {
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MLX5_ACCEL_ESP_AES_GCM_IV_ALGO_SEQ,
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};
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enum mlx5_accel_esp_flags {
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MLX5_ACCEL_ESP_FLAGS_TUNNEL = 0, /* Default */
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MLX5_ACCEL_ESP_FLAGS_TRANSPORT = 1UL << 0,
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MLX5_ACCEL_ESP_FLAGS_ESN_TRIGGERED = 1UL << 1,
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MLX5_ACCEL_ESP_FLAGS_ESN_STATE_OVERLAP = 1UL << 2,
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};
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enum mlx5_accel_esp_action {
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MLX5_ACCEL_ESP_ACTION_DECRYPT,
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MLX5_ACCEL_ESP_ACTION_ENCRYPT,
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};
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enum mlx5_accel_esp_keymats {
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MLX5_ACCEL_ESP_KEYMAT_AES_NONE,
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MLX5_ACCEL_ESP_KEYMAT_AES_GCM,
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};
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enum mlx5_accel_esp_replay {
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MLX5_ACCEL_ESP_REPLAY_NONE,
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MLX5_ACCEL_ESP_REPLAY_BMP,
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};
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struct aes_gcm_keymat {
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u64 seq_iv;
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enum mlx5_accel_esp_aes_gcm_keymat_iv_algo iv_algo;
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u32 salt;
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u32 icv_len;
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u32 key_len;
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u32 aes_key[256 / 32];
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};
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struct mlx5_accel_esp_xfrm_attrs {
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enum mlx5_accel_esp_action action;
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u32 esn;
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u32 spi;
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u32 seq;
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u32 tfc_pad;
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u32 flags;
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u32 sa_handle;
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enum mlx5_accel_esp_replay replay_type;
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union {
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struct {
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u32 size;
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} bmp;
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} replay;
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enum mlx5_accel_esp_keymats keymat_type;
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union {
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struct aes_gcm_keymat aes_gcm;
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} keymat;
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};
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struct mlx5_accel_esp_xfrm {
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struct mlx5_core_dev *mdev;
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struct mlx5_accel_esp_xfrm_attrs attrs;
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};
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enum {
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MLX5_ACCEL_XFRM_FLAG_REQUIRE_METADATA = 1UL << 0,
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};
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enum mlx5_accel_ipsec_cap {
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MLX5_ACCEL_IPSEC_CAP_DEVICE = 1 << 0,
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MLX5_ACCEL_IPSEC_CAP_REQUIRED_METADATA = 1 << 1,
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MLX5_ACCEL_IPSEC_CAP_ESP = 1 << 2,
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MLX5_ACCEL_IPSEC_CAP_IPV6 = 1 << 3,
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MLX5_ACCEL_IPSEC_CAP_LSO = 1 << 4,
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MLX5_ACCEL_IPSEC_CAP_RX_NO_TRAILER = 1 << 5,
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};
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#ifdef CONFIG_MLX5_ACCEL
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u32 mlx5_accel_ipsec_device_caps(struct mlx5_core_dev *mdev);
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struct mlx5_accel_esp_xfrm *
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mlx5_accel_esp_create_xfrm(struct mlx5_core_dev *mdev,
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const struct mlx5_accel_esp_xfrm_attrs *attrs,
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u32 flags);
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void mlx5_accel_esp_destroy_xfrm(struct mlx5_accel_esp_xfrm *xfrm);
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#else
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static inline u32 mlx5_accel_ipsec_device_caps(struct mlx5_core_dev *mdev) { return 0; }
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static inline struct mlx5_accel_esp_xfrm *
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mlx5_accel_esp_create_xfrm(struct mlx5_core_dev *mdev,
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const struct mlx5_accel_esp_xfrm_attrs *attrs,
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u32 flags) { return ERR_PTR(-EOPNOTSUPP); }
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static inline void
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mlx5_accel_esp_destroy_xfrm(struct mlx5_accel_esp_xfrm *xfrm) {}
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#endif
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#endif
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