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/*-
* Copyright (c) 2021-2022 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_RX_H_
#define _MLX5_TLS_RX_H_
#include <linux/completion.h>
#define MLX5E_TLS_RX_PROGRESS_BUFFER_SIZE 128
#define MLX5E_TLS_RX_RESYNC_MAX 32 /* units */
#define MLX5E_TLS_RX_NUM_MAX (1U << 11) /* packets */
#define MLX5E_TLS_RX_TAG_LOCK(tag) mtx_lock(&(tag)->mtx)
#define MLX5E_TLS_RX_TAG_UNLOCK(tag) mtx_unlock(&(tag)->mtx)
#define MLX5E_TLS_RX_STAT_INC(tag, field, num) \
counter_u64_add((tag)->tls_rx->stats.field, num)
#if ((MLX5E_TLS_RX_RESYNC_MAX * MLX5E_TLS_RX_NUM_MAX) << 14) > (1U << 30)
#error "Please lower the limits of the TLS record length database."
#endif
enum {
MLX5E_TLS_RX_PROGRESS_PARAMS_AUTH_STATE_NO_OFFLOAD = 0,
MLX5E_TLS_RX_PROGRESS_PARAMS_AUTH_STATE_OFFLOAD = 1,
MLX5E_TLS_RX_PROGRESS_PARAMS_AUTH_STATE_AUTHENTICATION = 2,
};
enum {
MLX5E_TLS_RX_PROGRESS_PARAMS_RECORD_TRACKER_STATE_START = 0,
MLX5E_TLS_RX_PROGRESS_PARAMS_RECORD_TRACKER_STATE_TRACKING = 1,
MLX5E_TLS_RX_PROGRESS_PARAMS_RECORD_TRACKER_STATE_SEARCHING = 2,
};
struct mlx5e_tls_rx;
struct mlx5e_tls_rx_tag {
struct m_snd_tag tag;
uint32_t tirn; /* HW TIR context number */
uint32_t dek_index; /* HW TLS context number */
struct mlx5e_tls_rx *tls_rx; /* parent pointer */
struct mlx5_flow_handle *flow_rule;
struct mtx mtx;
struct completion progress_complete;
uint32_t state; /* see MLX5E_TLS_RX_ST_XXX */
#define MLX5E_TLS_RX_ST_INIT 0
#define MLX5E_TLS_RX_ST_SETUP 1
#define MLX5E_TLS_RX_ST_READY 2
#define MLX5E_TLS_RX_ST_RELEASE 3
#define MLX5E_TLS_RX_ST_FREED 4
/*
* The following fields are used to store the TCP starting
* point of TLS records in the past. When TLS records of same
* length are back to back the tcp_resync_num[] is incremented
* instead of creating new entries. This way up to
* "MLX5E_TLS_RX_RESYNC_MAX" * "MLX5E_TLS_RX_NUM_MAX" * 16
* KBytes, around 1GByte worth of TCP data, may be remembered
* in the good case. The amount of history should not exceed
* 2GBytes of TCP data, because then the TCP sequence numbers
* may wrap around.
*
* This information is used to tell if a given TCP sequence
* number is a valid TLS record or not.
*/
uint64_t rcd_resync_start; /* starting TLS record number */
uint32_t tcp_resync_start; /* starting TCP sequence number */
uint32_t tcp_resync_next; /* next expected TCP sequence number */
uint32_t tcp_resync_len[MLX5E_TLS_RX_RESYNC_MAX];
uint32_t tcp_resync_num[MLX5E_TLS_RX_RESYNC_MAX];
uint16_t tcp_resync_pc; /* producer counter for arrays above */
uint16_t tcp_resync_cc; /* consumer counter for arrays above */
struct work_struct work;
uint32_t flowid;
uint32_t flowtype;
uint32_t dek_index_ok:1;
uint32_t tcp_resync_active:1;
uint32_t tcp_resync_pending:1;
/* parameters needed */
uint8_t crypto_params[128] __aligned(4);
uint8_t rx_progress[MLX5E_TLS_RX_PROGRESS_BUFFER_SIZE * 2];
} __aligned(MLX5E_CACHELINE_SIZE);
static inline void *
mlx5e_tls_rx_get_progress_buffer(struct mlx5e_tls_rx_tag *ptag)
{
/* return properly aligned RX buffer */
return (ptag->rx_progress +
((-(uintptr_t)ptag->rx_progress) &
(MLX5E_TLS_RX_PROGRESS_BUFFER_SIZE - 1)));
}
#define MLX5E_TLS_RX_STATS(m) \
m(+1, u64, rx_resync_ok, "rx_resync_ok", "Successful resync requests")\
m(+1, u64, rx_resync_err, "rx_resync_err", "Failed resync requests")\
m(+1, u64, rx_error, "rx_error", "Other errors")
#define MLX5E_TLS_RX_STATS_NUM (0 MLX5E_TLS_RX_STATS(MLX5E_STATS_COUNT))
struct mlx5e_tls_rx_stats {
struct sysctl_ctx_list ctx;
counter_u64_t arg[0];
MLX5E_TLS_RX_STATS(MLX5E_STATS_COUNTER)
};
struct mlx5e_tls_rx {
struct sysctl_ctx_list ctx;
struct mlx5e_tls_rx_stats stats;
struct workqueue_struct *wq;
uma_zone_t zone;
uint32_t max_resources; /* max number of resources */
volatile uint32_t num_resources; /* current number of resources */
int init; /* set when ready */
char zname[32];
};
int mlx5e_tls_rx_init(struct mlx5e_priv *);
void mlx5e_tls_rx_cleanup(struct mlx5e_priv *);
if_snd_tag_alloc_t mlx5e_tls_rx_snd_tag_alloc;
#endif /* _MLX5_TLS_RX_H_ */
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