drivers/net/ethernet/netronome/nfp/nfp_net_repr.h

   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  */
  80 struct nfp_repr {
  81         struct net_device *netdev;
  82         struct metadata_dst *dst;
  83         struct nfp_port *port;
  84         struct nfp_app *app;
  85         struct nfp_repr_pcpu_stats __percpu *stats;
  86 };
  87
  88 /**
  89  * enum nfp_repr_type - type of representor
  90  * @NFP_REPR_TYPE_PHYS_PORT:    external NIC port
  91  * @NFP_REPR_TYPE_PF:           physical function
  92  * @NFP_REPR_TYPE_VF:           virtual function
  93  * @__NFP_REPR_TYPE_MAX:        number of representor types
  94  */
  95 enum nfp_repr_type {
  96         NFP_REPR_TYPE_PHYS_PORT,
  97         NFP_REPR_TYPE_PF,
  98         NFP_REPR_TYPE_VF,
  99
 100         __NFP_REPR_TYPE_MAX,
 101 };
 102 #define NFP_REPR_TYPE_MAX (__NFP_REPR_TYPE_MAX - 1)
 103
 104 extern const struct net_device_ops nfp_repr_netdev_ops;
 105
 106 static inline bool nfp_netdev_is_nfp_repr(struct net_device *netdev)
 107 {
 108         return netdev->netdev_ops == &nfp_repr_netdev_ops;
 109 }
 110
 111 static inline int nfp_repr_get_port_id(struct net_device *netdev)
 112 {
 113         struct nfp_repr *priv = netdev_priv(netdev);
 114
 115         return priv->dst->u.port_info.port_id;
 116 }
 117
 118 struct net_device *
 119 nfp_repr_get_locked(struct nfp_app *app, struct nfp_reprs *set,
 120                     unsigned int id);
 121
 122 void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len);
 123 int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
 124                   u32 cmsg_port_id, struct nfp_port *port,
 125                   struct net_device *pf_netdev);
 126 struct net_device *nfp_repr_alloc(struct nfp_app *app);
 127 void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs);
 128 void nfp_reprs_clean_and_free_by_type(struct nfp_app *app,
 129                                       enum nfp_repr_type type);
 130 struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs);
 131 int nfp_reprs_resync_phys_ports(struct nfp_app *app);
 132
 133 #endif /* NFP_NET_REPR_H */