drivers/net/ethernet/netronome/nfp/nfp_port.c

   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 #include <linux/lockdep.h>
  35
  36 #include "nfpcore/nfp_nsp.h"
  37 #include "nfp_app.h"
  38 #include "nfp_main.h"
  39 #include "nfp_net.h"
  40 #include "nfp_port.h"
  41
  42 struct nfp_port *nfp_port_from_netdev(struct net_device *netdev)
  43 {
  44         struct nfp_net *nn;
  45
  46         if (WARN_ON(!nfp_netdev_is_nfp_net(netdev)))
  47                 return NULL;
  48         nn = netdev_priv(netdev);
  49
  50         return nn->port;
  51 }
  52
  53 struct nfp_port *
  54 nfp_port_from_id(struct nfp_pf *pf, enum nfp_port_type type, unsigned int id)
  55 {
  56         struct nfp_port *port;
  57
  58         lockdep_assert_held(&pf->lock);
  59
  60         if (type != NFP_PORT_PHYS_PORT)
  61                 return NULL;
  62
  63         list_for_each_entry(port, &pf->ports, port_list)
  64                 if (port->eth_id == id)
  65                         return port;
  66
  67         return NULL;
  68 }
  69
  70 struct nfp_eth_table_port *__nfp_port_get_eth_port(struct nfp_port *port)
  71 {
  72         if (!port)
  73                 return NULL;
  74         if (port->type != NFP_PORT_PHYS_PORT)
  75                 return NULL;
  76
  77         return port->eth_port;
  78 }
  79
  80 struct nfp_eth_table_port *nfp_port_get_eth_port(struct nfp_port *port)
  81 {
  82         if (!__nfp_port_get_eth_port(port))
  83                 return NULL;
  84
  85         if (test_bit(NFP_PORT_CHANGED, &port->flags))
  86                 if (nfp_net_refresh_eth_port(port))
  87                         return NULL;
  88
  89         return __nfp_port_get_eth_port(port);
  90 }
  91
  92 int
  93 nfp_port_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
  94 {
  95         struct nfp_eth_table_port *eth_port;
  96         struct nfp_port *port;
  97         int n;
  98
  99         port = nfp_port_from_netdev(netdev);
 100         eth_port = __nfp_port_get_eth_port(port);
 101         if (!eth_port)
 102                 return -EOPNOTSUPP;
 103
 104         if (!eth_port->is_split)
 105                 n = snprintf(name, len, "p%d", eth_port->label_port);
 106         else
 107                 n = snprintf(name, len, "p%ds%d", eth_port->label_port,
 108                              eth_port->label_subport);
 109         if (n >= len)
 110                 return -EINVAL;
 111
 112         return 0;
 113 }
 114
 115 struct nfp_port *
 116 nfp_port_alloc(struct nfp_app *app, enum nfp_port_type type,
 117                struct net_device *netdev)
 118 {
 119         struct nfp_port *port;
 120
 121         port = kzalloc(sizeof(*port), GFP_KERNEL);
 122         if (!port)
 123                 return ERR_PTR(-ENOMEM);
 124
 125         port->netdev = netdev;
 126         port->type = type;
 127         port->app = app;
 128
 129         list_add_tail(&port->port_list, &app->pf->ports);
 130
 131         return port;
 132 }
 133
 134 void nfp_port_free(struct nfp_port *port)
 135 {
 136         if (!port)
 137                 return;
 138         list_del(&port->port_list);
 139         kfree(port);
 140 }