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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2019 Mellanox Technologies.
#include "mlx5_core.h"
int mlx5_create_encryption_key(struct mlx5_core_dev *mdev,
void *key, u32 sz_bytes,
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,
MLX5_GENERAL_OBJECT_TYPE_ENCRYPTION_KEY_TYPE_DEK);
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));
}
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