1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2 /* Copyright (c) 2020 Mellanox Technologies. */
3 
4 #ifndef __MLX5_EN_PTP_H__
5 #define __MLX5_EN_PTP_H__
6 
7 #include "en.h"
8 #include "en_stats.h"
9 #include <linux/ptp_classify.h>
10 
11 #define MLX5E_PTP_CHANNEL_IX 0
12 
13 struct mlx5e_ptpsq {
14 	struct mlx5e_txqsq       txqsq;
15 	struct mlx5e_cq          ts_cq;
16 	u16                      skb_fifo_cc;
17 	u16                      skb_fifo_pc;
18 	struct mlx5e_skb_fifo    skb_fifo;
19 	struct mlx5e_ptp_cq_stats *cq_stats;
20 };
21 
22 enum {
23 	MLX5E_PTP_STATE_TX,
24 	MLX5E_PTP_STATE_RX,
25 	MLX5E_PTP_STATE_NUM_STATES,
26 };
27 
28 struct mlx5e_ptp {
29 	/* data path */
30 	struct mlx5e_ptpsq         ptpsq[MLX5E_MAX_NUM_TC];
31 	struct mlx5e_rq            rq;
32 	struct napi_struct         napi;
33 	struct device             *pdev;
34 	struct net_device         *netdev;
35 	__be32                     mkey_be;
36 	u8                         num_tc;
37 	u8                         lag_port;
38 
39 	/* data path - accessed per napi poll */
40 	struct mlx5e_ch_stats     *stats;
41 
42 	/* control */
43 	struct mlx5e_priv         *priv;
44 	struct mlx5_core_dev      *mdev;
45 	struct hwtstamp_config    *tstamp;
46 	DECLARE_BITMAP(state, MLX5E_PTP_STATE_NUM_STATES);
47 };
48 
mlx5e_use_ptpsq(struct sk_buff * skb)49 static inline bool mlx5e_use_ptpsq(struct sk_buff *skb)
50 {
51 	struct flow_keys fk;
52 
53 	if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
54 		return false;
55 
56 	if (!skb_flow_dissect_flow_keys(skb, &fk, 0))
57 		return false;
58 
59 	if (fk.basic.n_proto == htons(ETH_P_1588))
60 		return true;
61 
62 	if (fk.basic.n_proto != htons(ETH_P_IP) &&
63 	    fk.basic.n_proto != htons(ETH_P_IPV6))
64 		return false;
65 
66 	return (fk.basic.ip_proto == IPPROTO_UDP &&
67 		fk.ports.dst == htons(PTP_EV_PORT));
68 }
69 
70 int mlx5e_ptp_open(struct mlx5e_priv *priv, struct mlx5e_params *params,
71 		   u8 lag_port, struct mlx5e_ptp **cp);
72 void mlx5e_ptp_close(struct mlx5e_ptp *c);
73 void mlx5e_ptp_activate_channel(struct mlx5e_ptp *c);
74 void mlx5e_ptp_deactivate_channel(struct mlx5e_ptp *c);
75 int mlx5e_ptp_get_rqn(struct mlx5e_ptp *c, u32 *rqn);
76 int mlx5e_ptp_alloc_rx_fs(struct mlx5e_priv *priv);
77 void mlx5e_ptp_free_rx_fs(struct mlx5e_priv *priv);
78 int mlx5e_ptp_rx_manage_fs(struct mlx5e_priv *priv, bool set);
79 
80 enum {
81 	MLX5E_SKB_CB_CQE_HWTSTAMP  = BIT(0),
82 	MLX5E_SKB_CB_PORT_HWTSTAMP = BIT(1),
83 };
84 
85 void mlx5e_skb_cb_hwtstamp_handler(struct sk_buff *skb, int hwtstamp_type,
86 				   ktime_t hwtstamp,
87 				   struct mlx5e_ptp_cq_stats *cq_stats);
88 
89 void mlx5e_skb_cb_hwtstamp_init(struct sk_buff *skb);
90 #endif /* __MLX5_EN_PTP_H__ */
91