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

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
   3
   4 #include <linux/lockdep.h>
   5 #include <linux/netdevice.h>
   6
   7 #include "nfpcore/nfp_cpp.h"
   8 #include "nfpcore/nfp_nsp.h"
   9 #include "nfp_app.h"
  10 #include "nfp_main.h"
  11 #include "nfp_net.h"
  12 #include "nfp_port.h"
  13
  14 struct nfp_port *nfp_port_from_netdev(struct net_device *netdev)
  15 {
  16         if (nfp_netdev_is_nfp_net(netdev)) {
  17                 struct nfp_net *nn = netdev_priv(netdev);
  18
  19                 return nn->port;
  20         }
  21
  22         if (nfp_netdev_is_nfp_repr(netdev)) {
  23                 struct nfp_repr *repr = netdev_priv(netdev);
  24
  25                 return repr->port;
  26         }
  27
  28         WARN(1, "Unknown netdev type for nfp_port\n");
  29
  30         return NULL;
  31 }
  32
  33 int nfp_port_get_port_parent_id(struct net_device *netdev,
  34                                 struct netdev_phys_item_id *ppid)
  35 {
  36         struct nfp_port *port;
  37         const u8 *serial;
  38
  39         port = nfp_port_from_netdev(netdev);
  40         if (!port)
  41                 return -EOPNOTSUPP;
  42
  43         ppid->id_len = nfp_cpp_serial(port->app->cpp, &serial);
  44         memcpy(&ppid->id, serial, ppid->id_len);
  45
  46         return 0;
  47 }
  48
  49 int nfp_port_setup_tc(struct net_device *netdev, enum tc_setup_type type,
  50                       void *type_data)
  51 {
  52         struct nfp_port *port;
  53
  54         port = nfp_port_from_netdev(netdev);
  55         if (!port)
  56                 return -EOPNOTSUPP;
  57
  58         return nfp_app_setup_tc(port->app, netdev, type, type_data);
  59 }
  60
  61 int nfp_port_set_features(struct net_device *netdev, netdev_features_t features)
  62 {
  63         struct nfp_port *port;
  64
  65         port = nfp_port_from_netdev(netdev);
  66         if (!port)
  67                 return 0;
  68
  69         if ((netdev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC) &&
  70             port->tc_offload_cnt) {
  71                 netdev_err(netdev, "Cannot disable HW TC offload while offloads active\n");
  72                 return -EBUSY;
  73         }
  74
  75         return 0;
  76 }
  77
  78 struct nfp_eth_table_port *__nfp_port_get_eth_port(struct nfp_port *port)
  79 {
  80         if (!port)
  81                 return NULL;
  82         if (port->type != NFP_PORT_PHYS_PORT)
  83                 return NULL;
  84
  85         return port->eth_port;
  86 }
  87
  88 struct nfp_eth_table_port *nfp_port_get_eth_port(struct nfp_port *port)
  89 {
  90         if (!__nfp_port_get_eth_port(port))
  91                 return NULL;
  92
  93         if (test_bit(NFP_PORT_CHANGED, &port->flags))
  94                 if (nfp_net_refresh_eth_port(port))
  95                         return NULL;
  96
  97         return __nfp_port_get_eth_port(port);
  98 }
  99
 100 int
 101 nfp_port_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
 102 {
 103         struct nfp_eth_table_port *eth_port;
 104         struct nfp_port *port;
 105         int n;
 106
 107         port = nfp_port_from_netdev(netdev);
 108         if (!port)
 109                 return -EOPNOTSUPP;
 110
 111         switch (port->type) {
 112         case NFP_PORT_PHYS_PORT:
 113                 eth_port = __nfp_port_get_eth_port(port);
 114                 if (!eth_port)
 115                         return -EOPNOTSUPP;
 116
 117                 if (!eth_port->is_split)
 118                         n = snprintf(name, len, "p%d", eth_port->label_port);
 119                 else
 120                         n = snprintf(name, len, "p%ds%d", eth_port->label_port,
 121                                      eth_port->label_subport);
 122                 break;
 123         case NFP_PORT_PF_PORT:
 124                 if (!port->pf_split)
 125                         n = snprintf(name, len, "pf%d", port->pf_id);
 126                 else
 127                         n = snprintf(name, len, "pf%ds%d", port->pf_id,
 128                                      port->pf_split_id);
 129                 break;
 130         case NFP_PORT_VF_PORT:
 131                 n = snprintf(name, len, "pf%dvf%d", port->pf_id, port->vf_id);
 132                 break;
 133         default:
 134                 return -EOPNOTSUPP;
 135         }
 136
 137         if (n >= len)
 138                 return -EINVAL;
 139
 140         return 0;
 141 }
 142
 143 /**
 144  * nfp_port_configure() - helper to set the interface configured bit
 145  * @netdev:     net_device instance
 146  * @configed:   Desired state
 147  *
 148  * Helper to set the ifup/ifdown state on the PHY only if there is a physical
 149  * interface associated with the netdev.
 150  *
 151  * Return:
 152  * 0 - configuration successful (or no change);
 153  * -ERRNO - configuration failed.
 154  */
 155 int nfp_port_configure(struct net_device *netdev, bool configed)
 156 {
 157         struct nfp_eth_table_port *eth_port;
 158         struct nfp_port *port;
 159         int err;
 160
 161         port = nfp_port_from_netdev(netdev);
 162         eth_port = __nfp_port_get_eth_port(port);
 163         if (!eth_port)
 164                 return 0;
 165         if (port->eth_forced)
 166                 return 0;
 167
 168         err = nfp_eth_set_configured(port->app->cpp, eth_port->index, configed);
 169         return err < 0 && err != -EOPNOTSUPP ? err : 0;
 170 }
 171
 172 int nfp_port_init_phy_port(struct nfp_pf *pf, struct nfp_app *app,
 173                            struct nfp_port *port, unsigned int id)
 174 {
 175         /* Check if vNIC has external port associated and cfg is OK */
 176         if (!pf->eth_tbl || id >= pf->eth_tbl->count) {
 177                 nfp_err(app->cpp,
 178                         "NSP port entries don't match vNICs (no entry %d)\n",
 179                         id);
 180                 return -EINVAL;
 181         }
 182         if (pf->eth_tbl->ports[id].override_changed) {
 183                 nfp_warn(app->cpp,
 184                          "Config changed for port #%d, reboot required before port will be operational\n",
 185                          pf->eth_tbl->ports[id].index);
 186                 port->type = NFP_PORT_INVALID;
 187                 return 0;
 188         }
 189
 190         port->eth_port = &pf->eth_tbl->ports[id];
 191         port->eth_id = pf->eth_tbl->ports[id].index;
 192         port->netdev->dev_port = id;
 193         if (pf->mac_stats_mem)
 194                 port->eth_stats =
 195                         pf->mac_stats_mem + port->eth_id * NFP_MAC_STATS_SIZE;
 196
 197         return 0;
 198 }
 199
 200 struct nfp_port *
 201 nfp_port_alloc(struct nfp_app *app, enum nfp_port_type type,
 202                struct net_device *netdev)
 203 {
 204         struct nfp_port *port;
 205
 206         port = kzalloc(sizeof(*port), GFP_KERNEL);
 207         if (!port)
 208                 return ERR_PTR(-ENOMEM);
 209
 210         port->netdev = netdev;
 211         port->type = type;
 212         port->app = app;
 213
 214         list_add_tail(&port->port_list, &app->pf->ports);
 215
 216         return port;
 217 }
 218
 219 void nfp_port_free(struct nfp_port *port)
 220 {
 221         if (!port)
 222                 return;
 223         list_del(&port->port_list);
 224         kfree(port);
 225 }