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net/mlx5: Add crypto library to support create/destroy encryption key 

Encryption key create / destroy is done via
CREATE_GENERAL_OBJECT / DESTROY_GENERAL_OBJECT commands.

To be used in downstream patches by TLS API wrappers, to configure
the TIS context with the encryption key.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
alistair/sunxi64-5.4-dsi
Tariq Toukan 2019-07-05 18:30:13 +03:00 committed by David S. Miller
parent e2869fb206
commit 45d3b55dc6
3 changed files with 78 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/mellanox/mlx5/core/Makefile
View File

@ -55,7 +55,7 @@ mlx5_core-$(CONFIG_MLX5_CORE_IPOIB) += ipoib/ipoib.o ipoib/ethtool.o ipoib/ipoib
#
mlx5_core-$(CONFIG_MLX5_FPGA_IPSEC) += fpga/ipsec.o
mlx5_core-$(CONFIG_MLX5_FPGA_TLS) += fpga/tls.o
mlx5_core-$(CONFIG_MLX5_ACCEL) += accel/tls.o accel/ipsec.o
mlx5_core-$(CONFIG_MLX5_ACCEL) += lib/crypto.o accel/tls.o accel/ipsec.o
mlx5_core-$(CONFIG_MLX5_FPGA) += fpga/cmd.o fpga/core.o fpga/conn.o fpga/sdk.o

72
drivers/net/ethernet/mellanox/mlx5/core/lib/crypto.c 100644
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@ -0,0 +1,72 @@
// 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;
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));
}

5
drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h
View File

@ -79,4 +79,9 @@ struct mlx5_pme_stats {
void mlx5_get_pme_stats(struct mlx5_core_dev *dev, struct mlx5_pme_stats *stats);
int mlx5_notifier_call_chain(struct mlx5_events *events, unsigned int event, void *data);
/* Crypto */
int mlx5_create_encryption_key(struct mlx5_core_dev *mdev,
void *key, u32 sz_bytes, u32 *p_key_id);
void mlx5_destroy_encryption_key(struct mlx5_core_dev *mdev, u32 key_id);
#endif