/*-
 * Copyright (c) 2019 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2022 NVIDIA corporation & affiliates.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _MLX5_TLS_H_
#define _MLX5_TLS_H_

#define MLX5E_TLS_TAG_LOCK(tag)         mtx_lock(&(tag)->mtx)
#define MLX5E_TLS_TAG_UNLOCK(tag)       mtx_unlock(&(tag)->mtx)

#define MLX5E_TLS_STAT_INC(tag, field, num) \
        counter_u64_add((tag)->tls->stats.field, num)

enum {
      MLX5E_TLS_LOOP = 0,
      MLX5E_TLS_FAILURE = 1,
      MLX5E_TLS_DEFERRED = 2,
      MLX5E_TLS_CONTINUE = 3,
};

struct mlx5e_tls;
struct mlx5e_tls_tag {
        struct m_snd_tag tag;
        uint32_t tisn;          /* HW TIS context number */
        uint32_t dek_index;     /* HW TLS context number */
        struct mlx5e_tls *tls;
        struct m_snd_tag *rl_tag;
        struct mtx mtx;
        uint32_t expected_seq; /* expected TCP sequence number */
        uint32_t state; /* see MLX5E_TLS_ST_XXX */
#define MLX5E_TLS_ST_INIT 0
#define MLX5E_TLS_ST_SETUP 1
#define MLX5E_TLS_ST_TXRDY 2
#define MLX5E_TLS_ST_RELEASE 3
#define MLX5E_TLS_ST_FREED 4
        struct work_struct work;

        uint32_t dek_index_ok:1;

        /* parameters needed */
        uint8_t crypto_params[128] __aligned(4);
} __aligned(MLX5E_CACHELINE_SIZE);

#define MLX5E_TLS_STATS(m)                                      \
  m(+1, u64, tx_packets, "tx_packets", "Transmitted packets")   \
  m(+1, u64, tx_bytes, "tx_bytes", "Transmitted bytes")         \
  m(+1, u64, tx_packets_ooo, "tx_packets_ooo", "Transmitted packets out of order") \
  m(+1, u64, tx_bytes_ooo, "tx_bytes_ooo", "Transmitted bytes out of order") \
  m(+1, u64, tx_error, "tx_error", "Transmitted packets with error")

#define MLX5E_TLS_STATS_NUM (0 MLX5E_TLS_STATS(MLX5E_STATS_COUNT))

struct mlx5e_tls_stats {
        struct  sysctl_ctx_list ctx;
        counter_u64_t   arg[0];
        MLX5E_TLS_STATS(MLX5E_STATS_COUNTER)
};

struct mlx5e_tls {
        struct sysctl_ctx_list ctx;
        struct mlx5e_tls_stats stats;
        struct workqueue_struct *wq;
        struct workqueue_struct *prealloc_wq;
        struct work_struct prealloc_work;
        uma_zone_t zone;
        uint32_t max_resources;         /* max number of resources */
        int zone_max;
        int init;                       /* set when ready */
        char zname[32];
};

int mlx5e_tls_init(struct mlx5e_priv *);
void mlx5e_tls_cleanup(struct mlx5e_priv *);
int mlx5e_sq_tls_xmit(struct mlx5e_sq *, struct mlx5e_xmit_args *, struct mbuf **);
void mlx5e_tls_prealloc_tags(struct mlx5e_priv *priv);

if_snd_tag_alloc_t mlx5e_tls_snd_tag_alloc;

#endif                                  /* _MLX5_TLS_H_ */