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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2019 Mellanox Technologies.
#include <linux/debugfs.h>
#include "en.h"
#include "lib/mlx5.h"
#include "lib/crypto.h"
#include "en_accel/ktls.h"
#include "en_accel/ktls_utils.h"
#include "en_accel/fs_tcp.h"
struct mlx5_crypto_dek *mlx5_ktls_create_key(struct mlx5_crypto_dek_pool *dek_pool,
struct tls_crypto_info *crypto_info)
{
const void *key;
u32 sz_bytes;
switch (crypto_info->cipher_type) {
case TLS_CIPHER_AES_GCM_128: {
struct tls12_crypto_info_aes_gcm_128 *info =
(struct tls12_crypto_info_aes_gcm_128 *)crypto_info;
key = info->key;
sz_bytes = sizeof(info->key);
break;
}
case TLS_CIPHER_AES_GCM_256: {
struct tls12_crypto_info_aes_gcm_256 *info =
(struct tls12_crypto_info_aes_gcm_256 *)crypto_info;
key = info->key;
sz_bytes = sizeof(info->key);
break;
}
default:
return ERR_PTR(-EINVAL);
}
return mlx5_crypto_dek_create(dek_pool, key, sz_bytes);
}
void mlx5_ktls_destroy_key(struct mlx5_crypto_dek_pool *dek_pool,
struct mlx5_crypto_dek *dek)
{
mlx5_crypto_dek_destroy(dek_pool, dek);
}
static int mlx5e_ktls_add(struct net_device *netdev, struct sock *sk,
enum tls_offload_ctx_dir direction,
struct tls_crypto_info *crypto_info,
u32 start_offload_tcp_sn)
{
struct mlx5e_priv *priv = netdev_priv(netdev);
struct mlx5_core_dev *mdev = priv->mdev;
int err;
if (!mlx5e_ktls_type_check(mdev, crypto_info))
return -EOPNOTSUPP;
if (direction == TLS_OFFLOAD_CTX_DIR_TX)
err = mlx5e_ktls_add_tx(netdev, sk, crypto_info, start_offload_tcp_sn);
else
err = mlx5e_ktls_add_rx(netdev, sk, crypto_info, start_offload_tcp_sn);
return err;
}
static void mlx5e_ktls_del(struct net_device *netdev,
struct tls_context *tls_ctx,
enum tls_offload_ctx_dir direction)
{
if (direction == TLS_OFFLOAD_CTX_DIR_TX)
mlx5e_ktls_del_tx(netdev, tls_ctx);
else
mlx5e_ktls_del_rx(netdev, tls_ctx);
}
static int mlx5e_ktls_resync(struct net_device *netdev,
struct sock *sk, u32 seq, u8 *rcd_sn,
enum tls_offload_ctx_dir direction)
{
if (unlikely(direction != TLS_OFFLOAD_CTX_DIR_RX))
return -EOPNOTSUPP;
mlx5e_ktls_rx_resync(netdev, sk, seq, rcd_sn);
return 0;
}
static const struct tlsdev_ops mlx5e_ktls_ops = {
.tls_dev_add = mlx5e_ktls_add,
.tls_dev_del = mlx5e_ktls_del,
.tls_dev_resync = mlx5e_ktls_resync,
};
bool mlx5e_is_ktls_rx(struct mlx5_core_dev *mdev)
{
u8 max_sq_wqebbs = mlx5e_get_max_sq_wqebbs(mdev);
if (is_kdump_kernel() || !MLX5_CAP_GEN(mdev, tls_rx))
return false;
/* Check the possibility to post the required ICOSQ WQEs. */
if (WARN_ON_ONCE(max_sq_wqebbs < MLX5E_TLS_SET_STATIC_PARAMS_WQEBBS))
return false;
if (WARN_ON_ONCE(max_sq_wqebbs < MLX5E_TLS_SET_PROGRESS_PARAMS_WQEBBS))
return false;
if (WARN_ON_ONCE(max_sq_wqebbs < MLX5E_KTLS_GET_PROGRESS_WQEBBS))
return false;
return true;
}
void mlx5e_ktls_build_netdev(struct mlx5e_priv *priv)
{
struct net_device *netdev = priv->netdev;
struct mlx5_core_dev *mdev = priv->mdev;
if (!mlx5e_is_ktls_tx(mdev) && !mlx5e_is_ktls_rx(mdev))
return;
if (mlx5e_is_ktls_tx(mdev)) {
netdev->hw_features |= NETIF_F_HW_TLS_TX;
netdev->features |= NETIF_F_HW_TLS_TX;
}
if (mlx5e_is_ktls_rx(mdev))
netdev->hw_features |= NETIF_F_HW_TLS_RX;
netdev->tlsdev_ops = &mlx5e_ktls_ops;
}
int mlx5e_ktls_set_feature_rx(struct net_device *netdev, bool enable)
{
struct mlx5e_priv *priv = netdev_priv(netdev);
int err = 0;
mutex_lock(&priv->state_lock);
if (enable)
err = mlx5e_accel_fs_tcp_create(priv->fs);
else
mlx5e_accel_fs_tcp_destroy(priv->fs);
mutex_unlock(&priv->state_lock);
return err;
}
int mlx5e_ktls_init_rx(struct mlx5e_priv *priv)
{
int err;
if (!mlx5e_is_ktls_rx(priv->mdev))
return 0;
priv->tls->rx_wq = create_singlethread_workqueue("mlx5e_tls_rx");
if (!priv->tls->rx_wq)
return -ENOMEM;
if (priv->netdev->features & NETIF_F_HW_TLS_RX) {
err = mlx5e_accel_fs_tcp_create(priv->fs);
if (err) {
destroy_workqueue(priv->tls->rx_wq);
return err;
}
}
return 0;
}
void mlx5e_ktls_cleanup_rx(struct mlx5e_priv *priv)
{
if (!mlx5e_is_ktls_rx(priv->mdev))
return;
if (priv->netdev->features & NETIF_F_HW_TLS_RX)
mlx5e_accel_fs_tcp_destroy(priv->fs);
destroy_workqueue(priv->tls->rx_wq);
}
static void mlx5e_tls_debugfs_init(struct mlx5e_tls *tls,
struct dentry *dfs_root)
{
if (IS_ERR_OR_NULL(dfs_root))
return;
tls->debugfs.dfs = debugfs_create_dir("tls", dfs_root);
}
int mlx5e_ktls_init(struct mlx5e_priv *priv)
{
struct mlx5_crypto_dek_pool *dek_pool;
struct mlx5e_tls *tls;
if (!mlx5e_is_ktls_device(priv->mdev))
return 0;
tls = kzalloc(sizeof(*tls), GFP_KERNEL);
if (!tls)
return -ENOMEM;
tls->mdev = priv->mdev;
dek_pool = mlx5_crypto_dek_pool_create(priv->mdev, MLX5_ACCEL_OBJ_TLS_KEY);
if (IS_ERR(dek_pool)) {
kfree(tls);
return PTR_ERR(dek_pool);
}
tls->dek_pool = dek_pool;
priv->tls = tls;
mlx5e_tls_debugfs_init(tls, priv->dfs_root);
return 0;
}
void mlx5e_ktls_cleanup(struct mlx5e_priv *priv)
{
struct mlx5e_tls *tls = priv->tls;
if (!mlx5e_is_ktls_device(priv->mdev))
return;
debugfs_remove_recursive(tls->debugfs.dfs);
tls->debugfs.dfs = NULL;
mlx5_crypto_dek_pool_destroy(tls->dek_pool);
kfree(priv->tls);
priv->tls = NULL;
}
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