1 /*-
2 * Copyright (c) 2019-2021, Mellanox Technologies, Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 */
26
27 #include "opt_rss.h"
28 #include "opt_ratelimit.h"
29
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32
33 #include <dev/mlx5/driver.h>
34 #include <dev/mlx5/crypto.h>
35
mlx5_encryption_key_create(struct mlx5_core_dev * mdev,u32 pdn,u32 key_type,const void * p_key,u32 key_len,u32 * p_obj_id)36 int mlx5_encryption_key_create(struct mlx5_core_dev *mdev, u32 pdn, u32 key_type,
37 const void *p_key, u32 key_len, u32 *p_obj_id)
38 {
39 u32 in[MLX5_ST_SZ_DW(create_encryption_key_in)] = {};
40 u32 out[MLX5_ST_SZ_DW(create_encryption_key_out)] = {};
41 u64 general_obj_types;
42 int err;
43
44 general_obj_types = MLX5_CAP_GEN_64(mdev, general_obj_types);
45 if (!(general_obj_types & MLX5_HCA_CAP_GENERAL_OBJ_TYPES_ENCRYPTION_KEY))
46 return -EINVAL;
47
48 switch (key_len) {
49 case 128 / 8:
50 memcpy(MLX5_ADDR_OF(create_encryption_key_in, in,
51 encryption_key_object.key[4]), p_key, 128 / 8);
52 MLX5_SET(create_encryption_key_in, in, encryption_key_object.pd, pdn);
53 MLX5_SET(create_encryption_key_in, in, encryption_key_object.key_size,
54 MLX5_GENERAL_OBJECT_TYPE_ENCRYPTION_KEY_KEY_SIZE_128);
55 MLX5_SET(create_encryption_key_in, in, encryption_key_object.key_type,
56 key_type);
57 break;
58 case 256 / 8:
59 memcpy(MLX5_ADDR_OF(create_encryption_key_in, in,
60 encryption_key_object.key[0]), p_key, 256 / 8);
61 MLX5_SET(create_encryption_key_in, in, encryption_key_object.pd, pdn);
62 MLX5_SET(create_encryption_key_in, in, encryption_key_object.key_size,
63 MLX5_GENERAL_OBJECT_TYPE_ENCRYPTION_KEY_KEY_SIZE_256);
64 MLX5_SET(create_encryption_key_in, in, encryption_key_object.key_type,
65 key_type);
66 break;
67 default:
68 return -EINVAL;
69 }
70
71 MLX5_SET(create_encryption_key_in, in, opcode, MLX5_CMD_OP_CREATE_GENERAL_OBJ);
72 MLX5_SET(create_encryption_key_in, in, obj_type, MLX5_GENERAL_OBJECT_TYPES_ENCRYPTION_KEY);
73
74 err = mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out));
75 if (err == 0)
76 *p_obj_id = MLX5_GET(create_encryption_key_out, out, obj_id);
77
78 /* avoid leaking key on the stack */
79 explicit_bzero(in, sizeof(in));
80
81 return err;
82 }
83
mlx5_encryption_key_destroy(struct mlx5_core_dev * mdev,u32 oid)84 int mlx5_encryption_key_destroy(struct mlx5_core_dev *mdev, u32 oid)
85 {
86 u32 in[MLX5_ST_SZ_DW(destroy_encryption_key_in)] = {};
87 u32 out[MLX5_ST_SZ_DW(destroy_encryption_key_out)] = {};
88
89 MLX5_SET(destroy_encryption_key_in, in, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJ);
90 MLX5_SET(destroy_encryption_key_in, in, obj_type, MLX5_GENERAL_OBJECT_TYPES_ENCRYPTION_KEY);
91 MLX5_SET(destroy_encryption_key_in, in, obj_id, oid);
92
93 return mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out));
94 }
95