1 /*
2 * Copyright (c) 2017, Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #ifndef __MLX5E_IPOB_H__
34 #define __MLX5E_IPOB_H__
35
36 #ifdef CONFIG_MLX5_CORE_IPOIB
37
38 #include <linux/mlx5/fs.h>
39 #include "en.h"
40
41 #define MLX5I_MAX_NUM_TC 1
42
43 extern const struct ethtool_ops mlx5i_ethtool_ops;
44 extern const struct ethtool_ops mlx5i_pkey_ethtool_ops;
45
46 #define MLX5_IB_GRH_BYTES 40
47 #define MLX5_IPOIB_ENCAP_LEN 4
48 #define MLX5_IPOIB_PSEUDO_LEN 20
49 #define MLX5_IPOIB_HARD_LEN (MLX5_IPOIB_PSEUDO_LEN + MLX5_IPOIB_ENCAP_LEN)
50
51 /* ipoib rdma netdev's private data structure */
52 struct mlx5i_priv {
53 struct rdma_netdev rn; /* keep this first */
54 struct mlx5_core_qp qp;
55 bool sub_interface;
56 u32 qkey;
57 u16 pkey_index;
58 struct mlx5i_pkey_qpn_ht *qpn_htbl;
59 char *mlx5e_priv[0];
60 };
61
62 int mlx5i_create_tis(struct mlx5_core_dev *mdev, u32 underlay_qpn, u32 *tisn);
63
64 /* Underlay QP create/destroy functions */
65 int mlx5i_create_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp);
66 void mlx5i_destroy_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp);
67
68 /* Underlay QP state modification init/uninit functions */
69 int mlx5i_init_underlay_qp(struct mlx5e_priv *priv);
70 void mlx5i_uninit_underlay_qp(struct mlx5e_priv *priv);
71
72 /* Allocate/Free underlay QPN to net-device hash table */
73 int mlx5i_pkey_qpn_ht_init(struct net_device *netdev);
74 void mlx5i_pkey_qpn_ht_cleanup(struct net_device *netdev);
75
76 /* Add/Remove an underlay QPN to net-device mapping to/from the hash table */
77 int mlx5i_pkey_add_qpn(struct net_device *netdev, u32 qpn);
78 int mlx5i_pkey_del_qpn(struct net_device *netdev, u32 qpn);
79
80 /* Get the net-device corresponding to the given underlay QPN */
81 struct net_device *mlx5i_pkey_get_netdev(struct net_device *netdev, u32 qpn);
82
83 /* Shared ndo functions */
84 int mlx5i_dev_init(struct net_device *dev);
85 void mlx5i_dev_cleanup(struct net_device *dev);
86 int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
87
88 /* Parent profile functions */
89 int mlx5i_init(struct mlx5_core_dev *mdev,
90 struct net_device *netdev,
91 const struct mlx5e_profile *profile,
92 void *ppriv);
93 void mlx5i_cleanup(struct mlx5e_priv *priv);
94
95 /* Get child interface nic profile */
96 const struct mlx5e_profile *mlx5i_pkey_get_profile(void);
97
98 /* Extract mlx5e_priv from IPoIB netdev */
99 #define mlx5i_epriv(netdev) ((void *)(((struct mlx5i_priv *)netdev_priv(netdev))->mlx5e_priv))
100
101 struct mlx5_wqe_eth_pad {
102 u8 rsvd0[16];
103 };
104
105 struct mlx5i_tx_wqe {
106 struct mlx5_wqe_ctrl_seg ctrl;
107 struct mlx5_wqe_datagram_seg datagram;
108 struct mlx5_wqe_eth_pad pad;
109 struct mlx5_wqe_eth_seg eth;
110 struct mlx5_wqe_data_seg data[0];
111 };
112
mlx5i_sq_fetch_wqe(struct mlx5e_txqsq * sq,struct mlx5i_tx_wqe ** wqe,u16 pi)113 static inline void mlx5i_sq_fetch_wqe(struct mlx5e_txqsq *sq,
114 struct mlx5i_tx_wqe **wqe,
115 u16 pi)
116 {
117 struct mlx5_wq_cyc *wq = &sq->wq;
118
119 *wqe = mlx5_wq_cyc_get_wqe(wq, pi);
120 memset(*wqe, 0, sizeof(**wqe));
121 }
122
123 netdev_tx_t mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
124 struct mlx5_av *av, u32 dqpn, u32 dqkey,
125 bool xmit_more);
126 void mlx5i_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
127 void mlx5i_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats);
128
129 #endif /* CONFIG_MLX5_CORE_IPOIB */
130 #endif /* __MLX5E_IPOB_H__ */
131
