drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
   2 /* Copyright (c) 2019 Mellanox Technologies. */
   3
   4 #ifndef __MLX5E_KTLS_H__
   5 #define __MLX5E_KTLS_H__
   6
   7 #include "en.h"
   8
   9 #ifdef CONFIG_MLX5_EN_TLS
  10 #include <net/tls.h>
  11 #include "accel/tls.h"
  12
  13 #define MLX5E_KTLS_STATIC_UMR_WQE_SZ \
  14         (offsetof(struct mlx5e_umr_wqe, tls_static_params_ctx) + \
  15          MLX5_ST_SZ_BYTES(tls_static_params))
  16 #define MLX5E_KTLS_STATIC_WQEBBS \
  17         (DIV_ROUND_UP(MLX5E_KTLS_STATIC_UMR_WQE_SZ, MLX5_SEND_WQE_BB))
  18
  19 #define MLX5E_KTLS_PROGRESS_WQE_SZ \
  20         (offsetof(struct mlx5e_tx_wqe, tls_progress_params_ctx) + \
  21          MLX5_ST_SZ_BYTES(tls_progress_params))
  22 #define MLX5E_KTLS_PROGRESS_WQEBBS \
  23         (DIV_ROUND_UP(MLX5E_KTLS_PROGRESS_WQE_SZ, MLX5_SEND_WQE_BB))
  24
  25 struct mlx5e_dump_wqe {
  26         struct mlx5_wqe_ctrl_seg ctrl;
  27         struct mlx5_wqe_data_seg data;
  28 };
  29
  30 #define MLX5E_KTLS_DUMP_WQEBBS \
  31         (DIV_ROUND_UP(sizeof(struct mlx5e_dump_wqe), MLX5_SEND_WQE_BB))
  32
  33 enum {
  34         MLX5E_TLS_PROGRESS_PARAMS_AUTH_STATE_NO_OFFLOAD     = 0,
  35         MLX5E_TLS_PROGRESS_PARAMS_AUTH_STATE_OFFLOAD        = 1,
  36         MLX5E_TLS_PROGRESS_PARAMS_AUTH_STATE_AUTHENTICATION = 2,
  37 };
  38
  39 enum {
  40         MLX5E_TLS_PROGRESS_PARAMS_RECORD_TRACKER_STATE_START     = 0,
  41         MLX5E_TLS_PROGRESS_PARAMS_RECORD_TRACKER_STATE_TRACKING  = 1,
  42         MLX5E_TLS_PROGRESS_PARAMS_RECORD_TRACKER_STATE_SEARCHING = 2,
  43 };
  44
  45 struct mlx5e_ktls_offload_context_tx {
  46         struct tls_offload_context_tx *tx_ctx;
  47         struct tls12_crypto_info_aes_gcm_128 crypto_info;
  48         u32 expected_seq;
  49         u32 tisn;
  50         u32 key_id;
  51         bool ctx_post_pending;
  52 };
  53
  54 struct mlx5e_ktls_offload_context_tx_shadow {
  55         struct tls_offload_context_tx         tx_ctx;
  56         struct mlx5e_ktls_offload_context_tx *priv_tx;
  57 };
  58
  59 static inline void
  60 mlx5e_set_ktls_tx_priv_ctx(struct tls_context *tls_ctx,
  61                            struct mlx5e_ktls_offload_context_tx *priv_tx)
  62 {
  63         struct tls_offload_context_tx *tx_ctx = tls_offload_ctx_tx(tls_ctx);
  64         struct mlx5e_ktls_offload_context_tx_shadow *shadow;
  65
  66         BUILD_BUG_ON(sizeof(*shadow) > TLS_OFFLOAD_CONTEXT_SIZE_TX);
  67
  68         shadow = (struct mlx5e_ktls_offload_context_tx_shadow *)tx_ctx;
  69
  70         shadow->priv_tx = priv_tx;
  71         priv_tx->tx_ctx = tx_ctx;
  72 }
  73
  74 static inline struct mlx5e_ktls_offload_context_tx *
  75 mlx5e_get_ktls_tx_priv_ctx(struct tls_context *tls_ctx)
  76 {
  77         struct tls_offload_context_tx *tx_ctx = tls_offload_ctx_tx(tls_ctx);
  78         struct mlx5e_ktls_offload_context_tx_shadow *shadow;
  79
  80         BUILD_BUG_ON(sizeof(*shadow) > TLS_OFFLOAD_CONTEXT_SIZE_TX);
  81
  82         shadow = (struct mlx5e_ktls_offload_context_tx_shadow *)tx_ctx;
  83
  84         return shadow->priv_tx;
  85 }
  86
  87 void mlx5e_ktls_build_netdev(struct mlx5e_priv *priv);
  88 void mlx5e_ktls_tx_offload_set_pending(struct mlx5e_ktls_offload_context_tx *priv_tx);
  89
  90 struct sk_buff *mlx5e_ktls_handle_tx_skb(struct net_device *netdev,
  91                                          struct mlx5e_txqsq *sq,
  92                                          struct sk_buff *skb,
  93                                          struct mlx5e_tx_wqe **wqe, u16 *pi);
  94 void mlx5e_ktls_tx_handle_resync_dump_comp(struct mlx5e_txqsq *sq,
  95                                            struct mlx5e_tx_wqe_info *wi,
  96                                            u32 *dma_fifo_cc);
  97 static inline u8
  98 mlx5e_ktls_dumps_num_wqebbs(struct mlx5e_txqsq *sq, unsigned int nfrags,
  99                             unsigned int sync_len)
 100 {
 101         /* Given the MTU and sync_len, calculates an upper bound for the
 102          * number of WQEBBs needed for the TX resync DUMP WQEs of a record.
 103          */
 104         return MLX5E_KTLS_DUMP_WQEBBS *
 105                 (nfrags + DIV_ROUND_UP(sync_len, sq->hw_mtu));
 106 }
 107 #else
 108
 109 static inline void mlx5e_ktls_build_netdev(struct mlx5e_priv *priv)
 110 {
 111 }
 112
 113 static inline void
 114 mlx5e_ktls_tx_handle_resync_dump_comp(struct mlx5e_txqsq *sq,
 115                                       struct mlx5e_tx_wqe_info *wi,
 116                                       u32 *dma_fifo_cc) {}
 117
 118 #endif
 119
 120 #endif /* __MLX5E_TLS_H__ */