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_app;
39 struct nfp_net;
40 struct nfp_port;
41
42 #include <net/dst_metadata.h>
43
44 /**
45 * struct nfp_reprs - container for representor netdevs
46 * @num_reprs: Number of elements in reprs array
47 * @reprs: Array of representor netdevs
48 */
49 struct nfp_reprs {
50 unsigned int num_reprs;
51 struct net_device __rcu *reprs[0];
52 };
53
54 /**
55 * struct nfp_repr_pcpu_stats
56 * @rx_packets: Received packets
57 * @rx_bytes: Received bytes
58 * @tx_packets: Transmitted packets
59 * @tx_bytes: Transmitted dropped
60 * @tx_drops: Packets dropped on transmit
61 * @syncp: Reference count
62 */
63 struct nfp_repr_pcpu_stats {
64 u64 rx_packets;
65 u64 rx_bytes;
66 u64 tx_packets;
67 u64 tx_bytes;
68 u64 tx_drops;
69 struct u64_stats_sync syncp;
70 };
71
72 /**
73 * struct nfp_repr - priv data for representor netdevs
74 * @netdev: Back pointer to netdev
75 * @dst: Destination for packet TX
76 * @port: Port of representor
77 * @app: APP handle
78 * @stats: Statistic of packets hitting CPU
79 * @app_priv: Pointer for APP data
80 */
81 struct nfp_repr {
82 struct net_device *netdev;
83 struct metadata_dst *dst;
84 struct nfp_port *port;
85 struct nfp_app *app;
86 struct nfp_repr_pcpu_stats __percpu *stats;
87 void *app_priv;
88 };
89
90 /**
91 * enum nfp_repr_type - type of representor
92 * @NFP_REPR_TYPE_PHYS_PORT: external NIC port
93 * @NFP_REPR_TYPE_PF: physical function
94 * @NFP_REPR_TYPE_VF: virtual function
95 * @__NFP_REPR_TYPE_MAX: number of representor types
96 */
97 enum nfp_repr_type {
98 NFP_REPR_TYPE_PHYS_PORT,
99 NFP_REPR_TYPE_PF,
100 NFP_REPR_TYPE_VF,
101
102 __NFP_REPR_TYPE_MAX,
103 };
104 #define NFP_REPR_TYPE_MAX (__NFP_REPR_TYPE_MAX - 1)
105
106 extern const struct net_device_ops nfp_repr_netdev_ops;
107
nfp_netdev_is_nfp_repr(struct net_device * netdev)108 static inline bool nfp_netdev_is_nfp_repr(struct net_device *netdev)
109 {
110 return netdev->netdev_ops == &nfp_repr_netdev_ops;
111 }
112
nfp_repr_get_port_id(struct net_device * netdev)113 static inline int nfp_repr_get_port_id(struct net_device *netdev)
114 {
115 struct nfp_repr *priv = netdev_priv(netdev);
116
117 return priv->dst->u.port_info.port_id;
118 }
119
120 struct net_device *
121 nfp_repr_get_locked(struct nfp_app *app, struct nfp_reprs *set,
122 unsigned int id);
123
124 void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len);
125 int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
126 u32 cmsg_port_id, struct nfp_port *port,
127 struct net_device *pf_netdev);
128 void nfp_repr_free(struct net_device *netdev);
129 struct net_device *
130 nfp_repr_alloc_mqs(struct nfp_app *app, unsigned int txqs, unsigned int rxqs);
131 void nfp_repr_clean_and_free(struct nfp_repr *repr);
132 void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs);
133 void nfp_reprs_clean_and_free_by_type(struct nfp_app *app,
134 enum nfp_repr_type type);
135 struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs);
136 int nfp_reprs_resync_phys_ports(struct nfp_app *app);
137
nfp_repr_alloc(struct nfp_app * app)138 static inline struct net_device *nfp_repr_alloc(struct nfp_app *app)
139 {
140 return nfp_repr_alloc_mqs(app, 1, 1);
141 }
142 #endif /* NFP_NET_REPR_H */
143
