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 extern const struct mlx5e_rx_handlers mlx5i_rx_handlers;
46 
47 #define MLX5_IB_GRH_BYTES       40
48 #define MLX5_IPOIB_ENCAP_LEN    4
49 #define MLX5_IPOIB_PSEUDO_LEN   20
50 #define MLX5_IPOIB_HARD_LEN     (MLX5_IPOIB_PSEUDO_LEN + MLX5_IPOIB_ENCAP_LEN)
51 
52 /* ipoib rdma netdev's private data structure */
53 struct mlx5i_priv {
54 	struct rdma_netdev rn; /* keep this first */
55 	u32 qpn;
56 	bool   sub_interface;
57 	u32    qkey;
58 	u16    pkey_index;
59 	struct mlx5i_pkey_qpn_ht *qpn_htbl;
60 	char  *mlx5e_priv[];
61 };
62 
63 int mlx5i_create_tis(struct mlx5_core_dev *mdev, u32 underlay_qpn, u32 *tisn);
64 
65 /* Underlay QP create/destroy functions */
66 int mlx5i_create_underlay_qp(struct mlx5e_priv *priv);
67 void mlx5i_destroy_underlay_qp(struct mlx5_core_dev *mdev, u32 qpn);
68 
69 /* Underlay QP state modification init/uninit functions */
70 int mlx5i_init_underlay_qp(struct mlx5e_priv *priv);
71 void mlx5i_uninit_underlay_qp(struct mlx5e_priv *priv);
72 
73 /* Allocate/Free underlay QPN to net-device hash table */
74 int mlx5i_pkey_qpn_ht_init(struct net_device *netdev);
75 void mlx5i_pkey_qpn_ht_cleanup(struct net_device *netdev);
76 
77 /* Add/Remove an underlay QPN to net-device mapping to/from the hash table */
78 int mlx5i_pkey_add_qpn(struct net_device *netdev, u32 qpn);
79 int mlx5i_pkey_del_qpn(struct net_device *netdev, u32 qpn);
80 
81 /* Get the net-device corresponding to the given underlay QPN */
82 struct net_device *mlx5i_pkey_get_netdev(struct net_device *netdev, u32 qpn);
83 
84 /* Shared ndo functions */
85 int mlx5i_dev_init(struct net_device *dev);
86 void mlx5i_dev_cleanup(struct net_device *dev);
87 int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
88 
89 /* Parent profile functions */
90 int mlx5i_init(struct mlx5_core_dev *mdev, struct net_device *netdev);
91 void mlx5i_cleanup(struct mlx5e_priv *priv);
92 
93 int mlx5i_update_nic_rx(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[];
111 };
112 
113 #define MLX5I_SQ_FETCH_WQE(sq, pi) \
114 	((struct mlx5i_tx_wqe *)mlx5e_fetch_wqe(&(sq)->wq, pi, sizeof(struct mlx5i_tx_wqe)))
115 
116 void mlx5i_sq_xmit(struct mlx5e_txqsq *sq, struct sk_buff *skb,
117 		   struct mlx5_av *av, u32 dqpn, u32 dqkey, bool xmit_more);
118 void mlx5i_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats);
119 
120 #endif /* CONFIG_MLX5_CORE_IPOIB */
121 #endif /* __MLX5E_IPOB_H__ */
122