| // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB |
| // Copyright (c) 2019 Mellanox Technologies. |
| |
| #include "mlx5_core.h" |
| #include "lib/mlx5.h" |
| |
| int mlx5_create_encryption_key(struct mlx5_core_dev *mdev, |
| void *key, u32 sz_bytes, |
| u32 key_type, u32 *p_key_id) |
| { |
| u32 in[MLX5_ST_SZ_DW(create_encryption_key_in)] = {}; |
| u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; |
| u32 sz_bits = sz_bytes * BITS_PER_BYTE; |
| u8 general_obj_key_size; |
| u64 general_obj_types; |
| void *obj, *key_p; |
| int err; |
| |
| obj = MLX5_ADDR_OF(create_encryption_key_in, in, encryption_key_object); |
| key_p = MLX5_ADDR_OF(encryption_key_obj, obj, key); |
| |
| general_obj_types = MLX5_CAP_GEN_64(mdev, general_obj_types); |
| if (!(general_obj_types & |
| MLX5_HCA_CAP_GENERAL_OBJECT_TYPES_ENCRYPTION_KEY)) |
| return -EINVAL; |
| |
| switch (sz_bits) { |
| case 128: |
| general_obj_key_size = |
| MLX5_GENERAL_OBJECT_TYPE_ENCRYPTION_KEY_KEY_SIZE_128; |
| key_p += sz_bytes; |
| break; |
| case 256: |
| general_obj_key_size = |
| MLX5_GENERAL_OBJECT_TYPE_ENCRYPTION_KEY_KEY_SIZE_256; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| memcpy(key_p, key, sz_bytes); |
| |
| MLX5_SET(encryption_key_obj, obj, key_size, general_obj_key_size); |
| MLX5_SET(encryption_key_obj, obj, key_type, key_type); |
| MLX5_SET(general_obj_in_cmd_hdr, in, opcode, |
| MLX5_CMD_OP_CREATE_GENERAL_OBJECT); |
| MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, |
| MLX5_GENERAL_OBJECT_TYPES_ENCRYPTION_KEY); |
| MLX5_SET(encryption_key_obj, obj, pd, mdev->mlx5e_res.pdn); |
| |
| err = mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); |
| if (!err) |
| *p_key_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id); |
| |
| /* avoid leaking key on the stack */ |
| memzero_explicit(in, sizeof(in)); |
| |
| return err; |
| } |
| |
| void mlx5_destroy_encryption_key(struct mlx5_core_dev *mdev, u32 key_id) |
| { |
| u32 in[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)] = {}; |
| u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; |
| |
| MLX5_SET(general_obj_in_cmd_hdr, in, opcode, |
| MLX5_CMD_OP_DESTROY_GENERAL_OBJECT); |
| MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, |
| MLX5_GENERAL_OBJECT_TYPES_ENCRYPTION_KEY); |
| MLX5_SET(general_obj_in_cmd_hdr, in, obj_id, key_id); |
| |
| mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); |
| } |