net/dsa/slave.c

   1 /*
   2  * net/dsa/slave.c - Slave device handling
   3  * Copyright (c) 2008 Marvell Semiconductor
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/list.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/etherdevice.h>
  14 #include <linux/phy.h>
  15 #include "dsa_priv.h"
  16
  17 /* slave mii_bus handling ***************************************************/
  18 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
  19 {
  20         struct dsa_switch *ds = bus->priv;
  21
  22         if (ds->valid_port_mask & (1 << addr))
  23                 return ds->drv->phy_read(ds, addr, reg);
  24
  25         return 0xffff;
  26 }
  27
  28 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
  29 {
  30         struct dsa_switch *ds = bus->priv;
  31
  32         if (ds->valid_port_mask & (1 << addr))
  33                 return ds->drv->phy_write(ds, addr, reg, val);
  34
  35         return 0;
  36 }
  37
  38 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
  39 {
  40         ds->slave_mii_bus->priv = (void *)ds;
  41         ds->slave_mii_bus->name = "dsa slave smi";
  42         ds->slave_mii_bus->read = dsa_slave_phy_read;
  43         ds->slave_mii_bus->write = dsa_slave_phy_write;
  44         snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "%s:%.2x",
  45                         ds->master_mii_bus->id, ds->pd->sw_addr);
  46         ds->slave_mii_bus->parent = &(ds->master_mii_bus->dev);
  47 }
  48
  49
  50 /* slave device handling ****************************************************/
  51 static int dsa_slave_init(struct net_device *dev)
  52 {
  53         struct dsa_slave_priv *p = netdev_priv(dev);
  54         struct net_device *master = p->parent->master_netdev;
  55
  56         dev->iflink = master->ifindex;
  57
  58         return 0;
  59 }
  60
  61 static int dsa_slave_open(struct net_device *dev)
  62 {
  63         struct dsa_slave_priv *p = netdev_priv(dev);
  64         struct net_device *master = p->parent->master_netdev;
  65         int err;
  66
  67         if (!(master->flags & IFF_UP))
  68                 return -ENETDOWN;
  69
  70         if (compare_ether_addr(dev->dev_addr, master->dev_addr)) {
  71                 err = dev_unicast_add(master, dev->dev_addr, ETH_ALEN);
  72                 if (err < 0)
  73                         goto out;
  74         }
  75
  76         if (dev->flags & IFF_ALLMULTI) {
  77                 err = dev_set_allmulti(master, 1);
  78                 if (err < 0)
  79                         goto del_unicast;
  80         }
  81         if (dev->flags & IFF_PROMISC) {
  82                 err = dev_set_promiscuity(master, 1);
  83                 if (err < 0)
  84                         goto clear_allmulti;
  85         }
  86
  87         return 0;
  88
  89 clear_allmulti:
  90         if (dev->flags & IFF_ALLMULTI)
  91                 dev_set_allmulti(master, -1);
  92 del_unicast:
  93         if (compare_ether_addr(dev->dev_addr, master->dev_addr))
  94                 dev_unicast_delete(master, dev->dev_addr, ETH_ALEN);
  95 out:
  96         return err;
  97 }
  98
  99 static int dsa_slave_close(struct net_device *dev)
 100 {
 101         struct dsa_slave_priv *p = netdev_priv(dev);
 102         struct net_device *master = p->parent->master_netdev;
 103
 104         dev_mc_unsync(master, dev);
 105         dev_unicast_unsync(master, dev);
 106         if (dev->flags & IFF_ALLMULTI)
 107                 dev_set_allmulti(master, -1);
 108         if (dev->flags & IFF_PROMISC)
 109                 dev_set_promiscuity(master, -1);
 110
 111         if (compare_ether_addr(dev->dev_addr, master->dev_addr))
 112                 dev_unicast_delete(master, dev->dev_addr, ETH_ALEN);
 113
 114         return 0;
 115 }
 116
 117 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
 118 {
 119         struct dsa_slave_priv *p = netdev_priv(dev);
 120         struct net_device *master = p->parent->master_netdev;
 121
 122         if (change & IFF_ALLMULTI)
 123                 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
 124         if (change & IFF_PROMISC)
 125                 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
 126 }
 127
 128 static void dsa_slave_set_rx_mode(struct net_device *dev)
 129 {
 130         struct dsa_slave_priv *p = netdev_priv(dev);
 131         struct net_device *master = p->parent->master_netdev;
 132
 133         dev_mc_sync(master, dev);
 134         dev_unicast_sync(master, dev);
 135 }
 136
 137 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
 138 {
 139         struct dsa_slave_priv *p = netdev_priv(dev);
 140         struct net_device *master = p->parent->master_netdev;
 141         struct sockaddr *addr = a;
 142         int err;
 143
 144         if (!is_valid_ether_addr(addr->sa_data))
 145                 return -EADDRNOTAVAIL;
 146
 147         if (!(dev->flags & IFF_UP))
 148                 goto out;
 149
 150         if (compare_ether_addr(addr->sa_data, master->dev_addr)) {
 151                 err = dev_unicast_add(master, addr->sa_data, ETH_ALEN);
 152                 if (err < 0)
 153                         return err;
 154         }
 155
 156         if (compare_ether_addr(dev->dev_addr, master->dev_addr))
 157                 dev_unicast_delete(master, dev->dev_addr, ETH_ALEN);
 158
 159 out:
 160         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
 161
 162         return 0;
 163 }
 164
 165 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 166 {
 167         struct dsa_slave_priv *p = netdev_priv(dev);
 168         struct mii_ioctl_data *mii_data = if_mii(ifr);
 169
 170         if (p->phy != NULL)
 171                 return phy_mii_ioctl(p->phy, mii_data, cmd);
 172
 173         return -EOPNOTSUPP;
 174 }
 175
 176
 177 /* ethtool operations *******************************************************/
 178 static int
 179 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 180 {
 181         struct dsa_slave_priv *p = netdev_priv(dev);
 182         int err;
 183
 184         err = -EOPNOTSUPP;
 185         if (p->phy != NULL) {
 186                 err = phy_read_status(p->phy);
 187                 if (err == 0)
 188                         err = phy_ethtool_gset(p->phy, cmd);
 189         }
 190
 191         return err;
 192 }
 193
 194 static int
 195 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 196 {
 197         struct dsa_slave_priv *p = netdev_priv(dev);
 198
 199         if (p->phy != NULL)
 200                 return phy_ethtool_sset(p->phy, cmd);
 201
 202         return -EOPNOTSUPP;
 203 }
 204
 205 static void dsa_slave_get_drvinfo(struct net_device *dev,
 206                                   struct ethtool_drvinfo *drvinfo)
 207 {
 208         strncpy(drvinfo->driver, "dsa", 32);
 209         strncpy(drvinfo->version, dsa_driver_version, 32);
 210         strncpy(drvinfo->fw_version, "N/A", 32);
 211         strncpy(drvinfo->bus_info, "platform", 32);
 212 }
 213
 214 static int dsa_slave_nway_reset(struct net_device *dev)
 215 {
 216         struct dsa_slave_priv *p = netdev_priv(dev);
 217
 218         if (p->phy != NULL)
 219                 return genphy_restart_aneg(p->phy);
 220
 221         return -EOPNOTSUPP;
 222 }
 223
 224 static u32 dsa_slave_get_link(struct net_device *dev)
 225 {
 226         struct dsa_slave_priv *p = netdev_priv(dev);
 227
 228         if (p->phy != NULL) {
 229                 genphy_update_link(p->phy);
 230                 return p->phy->link;
 231         }
 232
 233         return -EOPNOTSUPP;
 234 }
 235
 236 static void dsa_slave_get_strings(struct net_device *dev,
 237                                   uint32_t stringset, uint8_t *data)
 238 {
 239         struct dsa_slave_priv *p = netdev_priv(dev);
 240         struct dsa_switch *ds = p->parent;
 241
 242         if (stringset == ETH_SS_STATS) {
 243                 int len = ETH_GSTRING_LEN;
 244
 245                 strncpy(data, "tx_packets", len);
 246                 strncpy(data + len, "tx_bytes", len);
 247                 strncpy(data + 2 * len, "rx_packets", len);
 248                 strncpy(data + 3 * len, "rx_bytes", len);
 249                 if (ds->drv->get_strings != NULL)
 250                         ds->drv->get_strings(ds, p->port, data + 4 * len);
 251         }
 252 }
 253
 254 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 255                                         struct ethtool_stats *stats,
 256                                         uint64_t *data)
 257 {
 258         struct dsa_slave_priv *p = netdev_priv(dev);
 259         struct dsa_switch *ds = p->parent;
 260
 261         data[0] = p->dev->stats.tx_packets;
 262         data[1] = p->dev->stats.tx_bytes;
 263         data[2] = p->dev->stats.rx_packets;
 264         data[3] = p->dev->stats.rx_bytes;
 265         if (ds->drv->get_ethtool_stats != NULL)
 266                 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
 267 }
 268
 269 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 270 {
 271         struct dsa_slave_priv *p = netdev_priv(dev);
 272         struct dsa_switch *ds = p->parent;
 273
 274         if (sset == ETH_SS_STATS) {
 275                 int count;
 276
 277                 count = 4;
 278                 if (ds->drv->get_sset_count != NULL)
 279                         count += ds->drv->get_sset_count(ds);
 280
 281                 return count;
 282         }
 283
 284         return -EOPNOTSUPP;
 285 }
 286
 287 static const struct ethtool_ops dsa_slave_ethtool_ops = {
 288         .get_settings           = dsa_slave_get_settings,
 289         .set_settings           = dsa_slave_set_settings,
 290         .get_drvinfo            = dsa_slave_get_drvinfo,
 291         .nway_reset             = dsa_slave_nway_reset,
 292         .get_link               = dsa_slave_get_link,
 293         .set_sg                 = ethtool_op_set_sg,
 294         .get_strings            = dsa_slave_get_strings,
 295         .get_ethtool_stats      = dsa_slave_get_ethtool_stats,
 296         .get_sset_count         = dsa_slave_get_sset_count,
 297 };
 298
 299 #ifdef CONFIG_NET_DSA_TAG_DSA
 300 static const struct net_device_ops dsa_netdev_ops = {
 301         .ndo_init               = dsa_slave_init,
 302         .ndo_open               = dsa_slave_open,
 303         .ndo_stop               = dsa_slave_close,
 304         .ndo_start_xmit         = dsa_xmit,
 305         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
 306         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
 307         .ndo_set_multicast_list = dsa_slave_set_rx_mode,
 308         .ndo_set_mac_address    = dsa_slave_set_mac_address,
 309         .ndo_do_ioctl           = dsa_slave_ioctl,
 310 };
 311 #endif
 312 #ifdef CONFIG_NET_DSA_TAG_EDSA
 313 static const struct net_device_ops edsa_netdev_ops = {
 314         .ndo_init               = dsa_slave_init,
 315         .ndo_open               = dsa_slave_open,
 316         .ndo_stop               = dsa_slave_close,
 317         .ndo_start_xmit         = edsa_xmit,
 318         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
 319         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
 320         .ndo_set_multicast_list = dsa_slave_set_rx_mode,
 321         .ndo_set_mac_address    = dsa_slave_set_mac_address,
 322         .ndo_do_ioctl           = dsa_slave_ioctl,
 323 };
 324 #endif
 325 #ifdef CONFIG_NET_DSA_TAG_TRAILER
 326 static const struct net_device_ops trailer_netdev_ops = {
 327         .ndo_init               = dsa_slave_init,
 328         .ndo_open               = dsa_slave_open,
 329         .ndo_stop               = dsa_slave_close,
 330         .ndo_start_xmit         = trailer_xmit,
 331         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
 332         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
 333         .ndo_set_multicast_list = dsa_slave_set_rx_mode,
 334         .ndo_set_mac_address    = dsa_slave_set_mac_address,
 335         .ndo_do_ioctl           = dsa_slave_ioctl,
 336 };
 337 #endif
 338
 339 /* slave device setup *******************************************************/
 340 struct net_device *
 341 dsa_slave_create(struct dsa_switch *ds, struct device *parent,
 342                  int port, char *name)
 343 {
 344         struct net_device *master = ds->master_netdev;
 345         struct net_device *slave_dev;
 346         struct dsa_slave_priv *p;
 347         int ret;
 348
 349         slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv),
 350                                  name, ether_setup);
 351         if (slave_dev == NULL)
 352                 return slave_dev;
 353
 354         slave_dev->features = master->vlan_features;
 355         SET_ETHTOOL_OPS(slave_dev, &dsa_slave_ethtool_ops);
 356         memcpy(slave_dev->dev_addr, master->dev_addr, ETH_ALEN);
 357         slave_dev->tx_queue_len = 0;
 358
 359         switch (ds->tag_protocol) {
 360 #ifdef CONFIG_NET_DSA_TAG_DSA
 361         case htons(ETH_P_DSA):
 362                 slave_dev->netdev_ops = &dsa_netdev_ops;
 363                 break;
 364 #endif
 365 #ifdef CONFIG_NET_DSA_TAG_EDSA
 366         case htons(ETH_P_EDSA):
 367                 slave_dev->netdev_ops = &edsa_netdev_ops;
 368                 break;
 369 #endif
 370 #ifdef CONFIG_NET_DSA_TAG_TRAILER
 371         case htons(ETH_P_TRAILER):
 372                 slave_dev->netdev_ops = &trailer_netdev_ops;
 373                 break;
 374 #endif
 375         default:
 376                 BUG();
 377         }
 378
 379         SET_NETDEV_DEV(slave_dev, parent);
 380         slave_dev->vlan_features = master->vlan_features;
 381
 382         p = netdev_priv(slave_dev);
 383         p->dev = slave_dev;
 384         p->parent = ds;
 385         p->port = port;
 386         p->phy = ds->slave_mii_bus->phy_map[port];
 387
 388         ret = register_netdev(slave_dev);
 389         if (ret) {
 390                 printk(KERN_ERR "%s: error %d registering interface %s\n",
 391                                 master->name, ret, slave_dev->name);
 392                 free_netdev(slave_dev);
 393                 return NULL;
 394         }
 395
 396         netif_carrier_off(slave_dev);
 397
 398         if (p->phy != NULL) {
 399                 phy_attach(slave_dev, dev_name(&p->phy->dev),
 400                            0, PHY_INTERFACE_MODE_GMII);
 401
 402                 p->phy->autoneg = AUTONEG_ENABLE;
 403                 p->phy->speed = 0;
 404                 p->phy->duplex = 0;
 405                 p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;
 406                 phy_start_aneg(p->phy);
 407         }
 408
 409         return slave_dev;
 410 }