1 /*
2  * Copyright (C) 2017 Netronome Systems, Inc.
3  *
4  * This software is dual licensed under the GNU General License Version 2,
5  * June 1991 as shown in the file COPYING in the top-level directory of this
6  * source tree or the BSD 2-Clause License provided below.  You have the
7  * option to license this software under the complete terms of either license.
8  *
9  * The BSD 2-Clause License:
10  *
11  *     Redistribution and use in source and binary forms, with or
12  *     without modification, are permitted provided that the following
13  *     conditions are met:
14  *
15  *      1. Redistributions of source code must retain the above
16  *         copyright notice, this list of conditions and the following
17  *         disclaimer.
18  *
19  *      2. Redistributions in binary form must reproduce the above
20  *         copyright notice, this list of conditions and the following
21  *         disclaimer in the documentation and/or other materials
22  *         provided with the distribution.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31  * SOFTWARE.
32  */
33 
34 #ifndef NFP_NET_REPR_H
35 #define NFP_NET_REPR_H
36 
37 struct metadata_dst;
38 struct nfp_net;
39 struct nfp_port;
40 
41 #include <net/dst_metadata.h>
42 
43 /**
44  * struct nfp_reprs - container for representor netdevs
45  * @num_reprs:	Number of elements in reprs array
46  * @reprs:	Array of representor netdevs
47  */
48 struct nfp_reprs {
49 	unsigned int num_reprs;
50 	struct net_device *reprs[0];
51 };
52 
53 /**
54  * struct nfp_repr_pcpu_stats
55  * @rx_packets:	Received packets
56  * @rx_bytes:	Received bytes
57  * @tx_packets:	Transmitted packets
58  * @tx_bytes:	Transmitted dropped
59  * @tx_drops:	Packets dropped on transmit
60  * @syncp:	Reference count
61  */
62 struct nfp_repr_pcpu_stats {
63 	u64 rx_packets;
64 	u64 rx_bytes;
65 	u64 tx_packets;
66 	u64 tx_bytes;
67 	u64 tx_drops;
68 	struct u64_stats_sync syncp;
69 };
70 
71 /**
72  * struct nfp_repr - priv data for representor netdevs
73  * @netdev:	Back pointer to netdev
74  * @dst:	Destination for packet TX
75  * @port:	Port of representor
76  * @app:	APP handle
77  * @stats:	Statistic of packets hitting CPU
78  */
79 struct nfp_repr {
80 	struct net_device *netdev;
81 	struct metadata_dst *dst;
82 	struct nfp_port *port;
83 	struct nfp_app *app;
84 	struct nfp_repr_pcpu_stats __percpu *stats;
85 };
86 
87 /**
88  * enum nfp_repr_type - type of representor
89  * @NFP_REPR_TYPE_PHYS_PORT:	external NIC port
90  * @NFP_REPR_TYPE_PF:		physical function
91  * @NFP_REPR_TYPE_VF:		virtual function
92  */
93 enum nfp_repr_type {
94 	NFP_REPR_TYPE_PHYS_PORT,
95 	NFP_REPR_TYPE_PF,
96 	NFP_REPR_TYPE_VF,
97 
98 	__NFP_REPR_TYPE_MAX,
99 };
100 #define NFP_REPR_TYPE_MAX (__NFP_REPR_TYPE_MAX - 1)
101 
102 extern const struct net_device_ops nfp_repr_netdev_ops;
103 
104 static inline bool nfp_netdev_is_nfp_repr(struct net_device *netdev)
105 {
106 	return netdev->netdev_ops == &nfp_repr_netdev_ops;
107 }
108 
109 static inline int nfp_repr_get_port_id(struct net_device *netdev)
110 {
111 	struct nfp_repr *priv = netdev_priv(netdev);
112 
113 	return priv->dst->u.port_info.port_id;
114 }
115 
116 void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len);
117 int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
118 		  u32 cmsg_port_id, struct nfp_port *port,
119 		  struct net_device *pf_netdev);
120 struct net_device *nfp_repr_alloc(struct nfp_app *app);
121 void
122 nfp_reprs_clean_and_free(struct nfp_reprs *reprs);
123 void
124 nfp_reprs_clean_and_free_by_type(struct nfp_app *app,
125 				 enum nfp_repr_type type);
126 struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs);
127 int nfp_reprs_resync_phys_ports(struct nfp_app *app);
128 
129 #endif /* NFP_NET_REPR_H */
130