1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
3 
4 #ifndef NFP_NET_REPR_H
5 #define NFP_NET_REPR_H
6 
7 struct metadata_dst;
8 struct nfp_app;
9 struct nfp_net;
10 struct nfp_port;
11 
12 #include <net/dst_metadata.h>
13 
14 /**
15  * struct nfp_reprs - container for representor netdevs
16  * @num_reprs:	Number of elements in reprs array
17  * @reprs:	Array of representor netdevs
18  */
19 struct nfp_reprs {
20 	unsigned int num_reprs;
21 	struct net_device __rcu *reprs[];
22 };
23 
24 /**
25  * struct nfp_repr_pcpu_stats
26  * @rx_packets:	Received packets
27  * @rx_bytes:	Received bytes
28  * @tx_packets:	Transmitted packets
29  * @tx_bytes:	Transmitted dropped
30  * @tx_drops:	Packets dropped on transmit
31  * @syncp:	Reference count
32  */
33 struct nfp_repr_pcpu_stats {
34 	u64 rx_packets;
35 	u64 rx_bytes;
36 	u64 tx_packets;
37 	u64 tx_bytes;
38 	u64 tx_drops;
39 	struct u64_stats_sync syncp;
40 };
41 
42 /**
43  * struct nfp_repr - priv data for representor netdevs
44  * @netdev:	Back pointer to netdev
45  * @dst:	Destination for packet TX
46  * @port:	Port of representor
47  * @app:	APP handle
48  * @stats:	Statistic of packets hitting CPU
49  * @app_priv:	Pointer for APP data
50  */
51 struct nfp_repr {
52 	struct net_device *netdev;
53 	struct metadata_dst *dst;
54 	struct nfp_port *port;
55 	struct nfp_app *app;
56 	struct nfp_repr_pcpu_stats __percpu *stats;
57 	void *app_priv;
58 };
59 
60 /**
61  * enum nfp_repr_type - type of representor
62  * @NFP_REPR_TYPE_PHYS_PORT:	external NIC port
63  * @NFP_REPR_TYPE_PF:		physical function
64  * @NFP_REPR_TYPE_VF:		virtual function
65  * @__NFP_REPR_TYPE_MAX:	number of representor types
66  */
67 enum nfp_repr_type {
68 	NFP_REPR_TYPE_PHYS_PORT,
69 	NFP_REPR_TYPE_PF,
70 	NFP_REPR_TYPE_VF,
71 
72 	__NFP_REPR_TYPE_MAX,
73 };
74 #define NFP_REPR_TYPE_MAX (__NFP_REPR_TYPE_MAX - 1)
75 
76 extern const struct net_device_ops nfp_repr_netdev_ops;
77 
nfp_netdev_is_nfp_repr(struct net_device * netdev)78 static inline bool nfp_netdev_is_nfp_repr(struct net_device *netdev)
79 {
80 	return netdev->netdev_ops == &nfp_repr_netdev_ops;
81 }
82 
nfp_repr_get_port_id(struct net_device * netdev)83 static inline int nfp_repr_get_port_id(struct net_device *netdev)
84 {
85 	struct nfp_repr *priv = netdev_priv(netdev);
86 
87 	return priv->dst->u.port_info.port_id;
88 }
89 
90 struct net_device *
91 nfp_repr_get_locked(struct nfp_app *app, struct nfp_reprs *set,
92 		    unsigned int id);
93 
94 void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len);
95 void
96 nfp_repr_transfer_features(struct net_device *netdev, struct net_device *lower);
97 int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
98 		  u32 cmsg_port_id, struct nfp_port *port,
99 		  struct net_device *pf_netdev);
100 void nfp_repr_free(struct net_device *netdev);
101 struct net_device *
102 nfp_repr_alloc_mqs(struct nfp_app *app, unsigned int txqs, unsigned int rxqs);
103 void nfp_repr_clean_and_free(struct nfp_repr *repr);
104 void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs);
105 void nfp_reprs_clean_and_free_by_type(struct nfp_app *app,
106 				      enum nfp_repr_type type);
107 struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs);
108 int nfp_reprs_resync_phys_ports(struct nfp_app *app);
109 
nfp_repr_alloc(struct nfp_app * app)110 static inline struct net_device *nfp_repr_alloc(struct nfp_app *app)
111 {
112 	return nfp_repr_alloc_mqs(app, 1, 1);
113 }
114 #endif /* NFP_NET_REPR_H */
115