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Date: Thu, 4 Jul 2019 18:15:55 +0000
From: Saeed Mahameed <saeedm@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Tariq Toukan <tariqt@...lanox.com>,
Eran Ben Elisha <eranbe@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 05/14] net/mlx5: Add crypto library to support
create/destroy encryption key
From: Tariq Toukan <tariqt@...lanox.com>
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@...lanox.com>
Signed-off-by: Eran Ben Elisha <eranbe@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
.../net/ethernet/mellanox/mlx5/core/Makefile | 2 +-
.../ethernet/mellanox/mlx5/core/lib/crypto.c | 72 +++++++++++++++++++
.../ethernet/mellanox/mlx5/core/lib/mlx5.h | 5 ++
3 files changed, 78 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/lib/crypto.c
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Makefile b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
index da7adac6b4a7..cf2b342b7566 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/Makefile
+++ b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
@@ -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
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/crypto.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/crypto.c
new file mode 100644
index 000000000000..823a0f5f76e2
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/crypto.c
@@ -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 */
+ memset(in, 0, 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));
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h
index d918e44491f4..b99d469e4e64 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/mlx5.h
@@ -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
--
2.21.0
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