net/dsa/slave.c

   1 /*
   2  * net/dsa/slave.c - Slave device handling
   3  * Copyright (c) 2008-2009 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/etherdevice.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/phy.h>
  15 #include <linux/phy_fixed.h>
  16 #include <linux/of_net.h>
  17 #include <linux/of_mdio.h>
  18 #include <linux/mdio.h>
  19 #include <net/rtnetlink.h>
  20 #include <net/switchdev.h>
  21 #include <linux/if_bridge.h>
  22 #include <linux/netpoll.h>
  23 #include "dsa_priv.h"
  24
  25 /* slave mii_bus handling ***************************************************/
  26 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
  27 {
  28         struct dsa_switch *ds = bus->priv;
  29
  30         if (ds->phys_mii_mask & (1 << addr))
  31                 return ds->ops->phy_read(ds, addr, reg);
  32
  33         return 0xffff;
  34 }
  35
  36 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
  37 {
  38         struct dsa_switch *ds = bus->priv;
  39
  40         if (ds->phys_mii_mask & (1 << addr))
  41                 return ds->ops->phy_write(ds, addr, reg, val);
  42
  43         return 0;
  44 }
  45
  46 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
  47 {
  48         ds->slave_mii_bus->priv = (void *)ds;
  49         ds->slave_mii_bus->name = "dsa slave smi";
  50         ds->slave_mii_bus->read = dsa_slave_phy_read;
  51         ds->slave_mii_bus->write = dsa_slave_phy_write;
  52         snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
  53                  ds->dst->tree, ds->index);
  54         ds->slave_mii_bus->parent = ds->dev;
  55         ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
  56 }
  57
  58
  59 /* slave device handling ****************************************************/
  60 static int dsa_slave_get_iflink(const struct net_device *dev)
  61 {
  62         struct dsa_slave_priv *p = netdev_priv(dev);
  63
  64         return p->parent->dst->master_netdev->ifindex;
  65 }
  66
  67 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
  68 {
  69         return !!p->bridge_dev;
  70 }
  71
  72 static void dsa_port_set_stp_state(struct dsa_switch *ds, int port, u8 state)
  73 {
  74         struct dsa_port *dp = &ds->ports[port];
  75
  76         if (ds->ops->port_stp_state_set)
  77                 ds->ops->port_stp_state_set(ds, port, state);
  78
  79         if (ds->ops->port_fast_age) {
  80                 /* Fast age FDB entries or flush appropriate forwarding database
  81                  * for the given port, if we are moving it from Learning or
  82                  * Forwarding state, to Disabled or Blocking or Listening state.
  83                  */
  84
  85                 if ((dp->stp_state == BR_STATE_LEARNING ||
  86                      dp->stp_state == BR_STATE_FORWARDING) &&
  87                     (state == BR_STATE_DISABLED ||
  88                      state == BR_STATE_BLOCKING ||
  89                      state == BR_STATE_LISTENING))
  90                         ds->ops->port_fast_age(ds, port);
  91         }
  92
  93         dp->stp_state = state;
  94 }
  95
  96 static int dsa_slave_open(struct net_device *dev)
  97 {
  98         struct dsa_slave_priv *p = netdev_priv(dev);
  99         struct net_device *master = p->parent->dst->master_netdev;
 100         struct dsa_switch *ds = p->parent;
 101         u8 stp_state = dsa_port_is_bridged(p) ?
 102                         BR_STATE_BLOCKING : BR_STATE_FORWARDING;
 103         int err;
 104
 105         if (!(master->flags & IFF_UP))
 106                 return -ENETDOWN;
 107
 108         if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
 109                 err = dev_uc_add(master, dev->dev_addr);
 110                 if (err < 0)
 111                         goto out;
 112         }
 113
 114         if (dev->flags & IFF_ALLMULTI) {
 115                 err = dev_set_allmulti(master, 1);
 116                 if (err < 0)
 117                         goto del_unicast;
 118         }
 119         if (dev->flags & IFF_PROMISC) {
 120                 err = dev_set_promiscuity(master, 1);
 121                 if (err < 0)
 122                         goto clear_allmulti;
 123         }
 124
 125         if (ds->ops->port_enable) {
 126                 err = ds->ops->port_enable(ds, p->port, p->phy);
 127                 if (err)
 128                         goto clear_promisc;
 129         }
 130
 131         dsa_port_set_stp_state(ds, p->port, stp_state);
 132
 133         if (p->phy)
 134                 phy_start(p->phy);
 135
 136         return 0;
 137
 138 clear_promisc:
 139         if (dev->flags & IFF_PROMISC)
 140                 dev_set_promiscuity(master, -1);
 141 clear_allmulti:
 142         if (dev->flags & IFF_ALLMULTI)
 143                 dev_set_allmulti(master, -1);
 144 del_unicast:
 145         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 146                 dev_uc_del(master, dev->dev_addr);
 147 out:
 148         return err;
 149 }
 150
 151 static int dsa_slave_close(struct net_device *dev)
 152 {
 153         struct dsa_slave_priv *p = netdev_priv(dev);
 154         struct net_device *master = p->parent->dst->master_netdev;
 155         struct dsa_switch *ds = p->parent;
 156
 157         if (p->phy)
 158                 phy_stop(p->phy);
 159
 160         dev_mc_unsync(master, dev);
 161         dev_uc_unsync(master, dev);
 162         if (dev->flags & IFF_ALLMULTI)
 163                 dev_set_allmulti(master, -1);
 164         if (dev->flags & IFF_PROMISC)
 165                 dev_set_promiscuity(master, -1);
 166
 167         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 168                 dev_uc_del(master, dev->dev_addr);
 169
 170         if (ds->ops->port_disable)
 171                 ds->ops->port_disable(ds, p->port, p->phy);
 172
 173         dsa_port_set_stp_state(ds, p->port, BR_STATE_DISABLED);
 174
 175         return 0;
 176 }
 177
 178 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
 179 {
 180         struct dsa_slave_priv *p = netdev_priv(dev);
 181         struct net_device *master = p->parent->dst->master_netdev;
 182
 183         if (change & IFF_ALLMULTI)
 184                 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
 185         if (change & IFF_PROMISC)
 186                 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
 187 }
 188
 189 static void dsa_slave_set_rx_mode(struct net_device *dev)
 190 {
 191         struct dsa_slave_priv *p = netdev_priv(dev);
 192         struct net_device *master = p->parent->dst->master_netdev;
 193
 194         dev_mc_sync(master, dev);
 195         dev_uc_sync(master, dev);
 196 }
 197
 198 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
 199 {
 200         struct dsa_slave_priv *p = netdev_priv(dev);
 201         struct net_device *master = p->parent->dst->master_netdev;
 202         struct sockaddr *addr = a;
 203         int err;
 204
 205         if (!is_valid_ether_addr(addr->sa_data))
 206                 return -EADDRNOTAVAIL;
 207
 208         if (!(dev->flags & IFF_UP))
 209                 goto out;
 210
 211         if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
 212                 err = dev_uc_add(master, addr->sa_data);
 213                 if (err < 0)
 214                         return err;
 215         }
 216
 217         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 218                 dev_uc_del(master, dev->dev_addr);
 219
 220 out:
 221         ether_addr_copy(dev->dev_addr, addr->sa_data);
 222
 223         return 0;
 224 }
 225
 226 static int dsa_slave_port_vlan_add(struct net_device *dev,
 227                                    const struct switchdev_obj_port_vlan *vlan,
 228                                    struct switchdev_trans *trans)
 229 {
 230         struct dsa_slave_priv *p = netdev_priv(dev);
 231         struct dsa_switch *ds = p->parent;
 232
 233         if (switchdev_trans_ph_prepare(trans)) {
 234                 if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add)
 235                         return -EOPNOTSUPP;
 236
 237                 return ds->ops->port_vlan_prepare(ds, p->port, vlan, trans);
 238         }
 239
 240         ds->ops->port_vlan_add(ds, p->port, vlan, trans);
 241
 242         return 0;
 243 }
 244
 245 static int dsa_slave_port_vlan_del(struct net_device *dev,
 246                                    const struct switchdev_obj_port_vlan *vlan)
 247 {
 248         struct dsa_slave_priv *p = netdev_priv(dev);
 249         struct dsa_switch *ds = p->parent;
 250
 251         if (!ds->ops->port_vlan_del)
 252                 return -EOPNOTSUPP;
 253
 254         return ds->ops->port_vlan_del(ds, p->port, vlan);
 255 }
 256
 257 static int dsa_slave_port_vlan_dump(struct net_device *dev,
 258                                     struct switchdev_obj_port_vlan *vlan,
 259                                     switchdev_obj_dump_cb_t *cb)
 260 {
 261         struct dsa_slave_priv *p = netdev_priv(dev);
 262         struct dsa_switch *ds = p->parent;
 263
 264         if (ds->ops->port_vlan_dump)
 265                 return ds->ops->port_vlan_dump(ds, p->port, vlan, cb);
 266
 267         return -EOPNOTSUPP;
 268 }
 269
 270 static int dsa_slave_port_fdb_add(struct net_device *dev,
 271                                   const struct switchdev_obj_port_fdb *fdb,
 272                                   struct switchdev_trans *trans)
 273 {
 274         struct dsa_slave_priv *p = netdev_priv(dev);
 275         struct dsa_switch *ds = p->parent;
 276
 277         if (switchdev_trans_ph_prepare(trans)) {
 278                 if (!ds->ops->port_fdb_prepare || !ds->ops->port_fdb_add)
 279                         return -EOPNOTSUPP;
 280
 281                 return ds->ops->port_fdb_prepare(ds, p->port, fdb, trans);
 282         }
 283
 284         ds->ops->port_fdb_add(ds, p->port, fdb, trans);
 285
 286         return 0;
 287 }
 288
 289 static int dsa_slave_port_fdb_del(struct net_device *dev,
 290                                   const struct switchdev_obj_port_fdb *fdb)
 291 {
 292         struct dsa_slave_priv *p = netdev_priv(dev);
 293         struct dsa_switch *ds = p->parent;
 294         int ret = -EOPNOTSUPP;
 295
 296         if (ds->ops->port_fdb_del)
 297                 ret = ds->ops->port_fdb_del(ds, p->port, fdb);
 298
 299         return ret;
 300 }
 301
 302 static int dsa_slave_port_fdb_dump(struct net_device *dev,
 303                                    struct switchdev_obj_port_fdb *fdb,
 304                                    switchdev_obj_dump_cb_t *cb)
 305 {
 306         struct dsa_slave_priv *p = netdev_priv(dev);
 307         struct dsa_switch *ds = p->parent;
 308
 309         if (ds->ops->port_fdb_dump)
 310                 return ds->ops->port_fdb_dump(ds, p->port, fdb, cb);
 311
 312         return -EOPNOTSUPP;
 313 }
 314
 315 static int dsa_slave_port_mdb_add(struct net_device *dev,
 316                                   const struct switchdev_obj_port_mdb *mdb,
 317                                   struct switchdev_trans *trans)
 318 {
 319         struct dsa_slave_priv *p = netdev_priv(dev);
 320         struct dsa_switch *ds = p->parent;
 321
 322         if (switchdev_trans_ph_prepare(trans)) {
 323                 if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
 324                         return -EOPNOTSUPP;
 325
 326                 return ds->ops->port_mdb_prepare(ds, p->port, mdb, trans);
 327         }
 328
 329         ds->ops->port_mdb_add(ds, p->port, mdb, trans);
 330
 331         return 0;
 332 }
 333
 334 static int dsa_slave_port_mdb_del(struct net_device *dev,
 335                                   const struct switchdev_obj_port_mdb *mdb)
 336 {
 337         struct dsa_slave_priv *p = netdev_priv(dev);
 338         struct dsa_switch *ds = p->parent;
 339
 340         if (ds->ops->port_mdb_del)
 341                 return ds->ops->port_mdb_del(ds, p->port, mdb);
 342
 343         return -EOPNOTSUPP;
 344 }
 345
 346 static int dsa_slave_port_mdb_dump(struct net_device *dev,
 347                                    struct switchdev_obj_port_mdb *mdb,
 348                                    switchdev_obj_dump_cb_t *cb)
 349 {
 350         struct dsa_slave_priv *p = netdev_priv(dev);
 351         struct dsa_switch *ds = p->parent;
 352
 353         if (ds->ops->port_mdb_dump)
 354                 return ds->ops->port_mdb_dump(ds, p->port, mdb, cb);
 355
 356         return -EOPNOTSUPP;
 357 }
 358
 359 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 360 {
 361         struct dsa_slave_priv *p = netdev_priv(dev);
 362
 363         if (p->phy != NULL)
 364                 return phy_mii_ioctl(p->phy, ifr, cmd);
 365
 366         return -EOPNOTSUPP;
 367 }
 368
 369 static int dsa_slave_stp_state_set(struct net_device *dev,
 370                                    const struct switchdev_attr *attr,
 371                                    struct switchdev_trans *trans)
 372 {
 373         struct dsa_slave_priv *p = netdev_priv(dev);
 374         struct dsa_switch *ds = p->parent;
 375
 376         if (switchdev_trans_ph_prepare(trans))
 377                 return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
 378
 379         dsa_port_set_stp_state(ds, p->port, attr->u.stp_state);
 380
 381         return 0;
 382 }
 383
 384 static int dsa_slave_vlan_filtering(struct net_device *dev,
 385                                     const struct switchdev_attr *attr,
 386                                     struct switchdev_trans *trans)
 387 {
 388         struct dsa_slave_priv *p = netdev_priv(dev);
 389         struct dsa_switch *ds = p->parent;
 390
 391         /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
 392         if (switchdev_trans_ph_prepare(trans))
 393                 return 0;
 394
 395         if (ds->ops->port_vlan_filtering)
 396                 return ds->ops->port_vlan_filtering(ds, p->port,
 397                                                     attr->u.vlan_filtering);
 398
 399         return 0;
 400 }
 401
 402 static int dsa_fastest_ageing_time(struct dsa_switch *ds,
 403                                    unsigned int ageing_time)
 404 {
 405         int i;
 406
 407         for (i = 0; i < DSA_MAX_PORTS; ++i) {
 408                 struct dsa_port *dp = &ds->ports[i];
 409
 410                 if (dp && dp->ageing_time && dp->ageing_time < ageing_time)
 411                         ageing_time = dp->ageing_time;
 412         }
 413
 414         return ageing_time;
 415 }
 416
 417 static int dsa_slave_ageing_time(struct net_device *dev,
 418                                  const struct switchdev_attr *attr,
 419                                  struct switchdev_trans *trans)
 420 {
 421         struct dsa_slave_priv *p = netdev_priv(dev);
 422         struct dsa_switch *ds = p->parent;
 423         unsigned long ageing_jiffies = clock_t_to_jiffies(attr->u.ageing_time);
 424         unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
 425
 426         /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
 427         if (switchdev_trans_ph_prepare(trans))
 428                 return 0;
 429
 430         /* Keep the fastest ageing time in case of multiple bridges */
 431         ds->ports[p->port].ageing_time = ageing_time;
 432         ageing_time = dsa_fastest_ageing_time(ds, ageing_time);
 433
 434         if (ds->ops->set_ageing_time)
 435                 return ds->ops->set_ageing_time(ds, ageing_time);
 436
 437         return 0;
 438 }
 439
 440 static int dsa_slave_port_attr_set(struct net_device *dev,
 441                                    const struct switchdev_attr *attr,
 442                                    struct switchdev_trans *trans)
 443 {
 444         int ret;
 445
 446         switch (attr->id) {
 447         case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
 448                 ret = dsa_slave_stp_state_set(dev, attr, trans);
 449                 break;
 450         case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
 451                 ret = dsa_slave_vlan_filtering(dev, attr, trans);
 452                 break;
 453         case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
 454                 ret = dsa_slave_ageing_time(dev, attr, trans);
 455                 break;
 456         default:
 457                 ret = -EOPNOTSUPP;
 458                 break;
 459         }
 460
 461         return ret;
 462 }
 463
 464 static int dsa_slave_port_obj_add(struct net_device *dev,
 465                                   const struct switchdev_obj *obj,
 466                                   struct switchdev_trans *trans)
 467 {
 468         int err;
 469
 470         /* For the prepare phase, ensure the full set of changes is feasable in
 471          * one go in order to signal a failure properly. If an operation is not
 472          * supported, return -EOPNOTSUPP.
 473          */
 474
 475         switch (obj->id) {
 476         case SWITCHDEV_OBJ_ID_PORT_FDB:
 477                 err = dsa_slave_port_fdb_add(dev,
 478                                              SWITCHDEV_OBJ_PORT_FDB(obj),
 479                                              trans);
 480                 break;
 481         case SWITCHDEV_OBJ_ID_PORT_MDB:
 482                 err = dsa_slave_port_mdb_add(dev, SWITCHDEV_OBJ_PORT_MDB(obj),
 483                                              trans);
 484                 break;
 485         case SWITCHDEV_OBJ_ID_PORT_VLAN:
 486                 err = dsa_slave_port_vlan_add(dev,
 487                                               SWITCHDEV_OBJ_PORT_VLAN(obj),
 488                                               trans);
 489                 break;
 490         default:
 491                 err = -EOPNOTSUPP;
 492                 break;
 493         }
 494
 495         return err;
 496 }
 497
 498 static int dsa_slave_port_obj_del(struct net_device *dev,
 499                                   const struct switchdev_obj *obj)
 500 {
 501         int err;
 502
 503         switch (obj->id) {
 504         case SWITCHDEV_OBJ_ID_PORT_FDB:
 505                 err = dsa_slave_port_fdb_del(dev,
 506                                              SWITCHDEV_OBJ_PORT_FDB(obj));
 507                 break;
 508         case SWITCHDEV_OBJ_ID_PORT_MDB:
 509                 err = dsa_slave_port_mdb_del(dev, SWITCHDEV_OBJ_PORT_MDB(obj));
 510                 break;
 511         case SWITCHDEV_OBJ_ID_PORT_VLAN:
 512                 err = dsa_slave_port_vlan_del(dev,
 513                                               SWITCHDEV_OBJ_PORT_VLAN(obj));
 514                 break;
 515         default:
 516                 err = -EOPNOTSUPP;
 517                 break;
 518         }
 519
 520         return err;
 521 }
 522
 523 static int dsa_slave_port_obj_dump(struct net_device *dev,
 524                                    struct switchdev_obj *obj,
 525                                    switchdev_obj_dump_cb_t *cb)
 526 {
 527         int err;
 528
 529         switch (obj->id) {
 530         case SWITCHDEV_OBJ_ID_PORT_FDB:
 531                 err = dsa_slave_port_fdb_dump(dev,
 532                                               SWITCHDEV_OBJ_PORT_FDB(obj),
 533                                               cb);
 534                 break;
 535         case SWITCHDEV_OBJ_ID_PORT_MDB:
 536                 err = dsa_slave_port_mdb_dump(dev, SWITCHDEV_OBJ_PORT_MDB(obj),
 537                                               cb);
 538                 break;
 539         case SWITCHDEV_OBJ_ID_PORT_VLAN:
 540                 err = dsa_slave_port_vlan_dump(dev,
 541                                                SWITCHDEV_OBJ_PORT_VLAN(obj),
 542                                                cb);
 543                 break;
 544         default:
 545                 err = -EOPNOTSUPP;
 546                 break;
 547         }
 548
 549         return err;
 550 }
 551
 552 static int dsa_slave_bridge_port_join(struct net_device *dev,
 553                                       struct net_device *br)
 554 {
 555         struct dsa_slave_priv *p = netdev_priv(dev);
 556         struct dsa_switch *ds = p->parent;
 557         int ret = -EOPNOTSUPP;
 558
 559         p->bridge_dev = br;
 560
 561         if (ds->ops->port_bridge_join)
 562                 ret = ds->ops->port_bridge_join(ds, p->port, br);
 563
 564         return ret == -EOPNOTSUPP ? 0 : ret;
 565 }
 566
 567 static void dsa_slave_bridge_port_leave(struct net_device *dev)
 568 {
 569         struct dsa_slave_priv *p = netdev_priv(dev);
 570         struct dsa_switch *ds = p->parent;
 571
 572
 573         if (ds->ops->port_bridge_leave)
 574                 ds->ops->port_bridge_leave(ds, p->port);
 575
 576         p->bridge_dev = NULL;
 577
 578         /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
 579          * so allow it to be in BR_STATE_FORWARDING to be kept functional
 580          */
 581         dsa_port_set_stp_state(ds, p->port, BR_STATE_FORWARDING);
 582 }
 583
 584 static int dsa_slave_port_attr_get(struct net_device *dev,
 585                                    struct switchdev_attr *attr)
 586 {
 587         struct dsa_slave_priv *p = netdev_priv(dev);
 588         struct dsa_switch *ds = p->parent;
 589
 590         switch (attr->id) {
 591         case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
 592                 attr->u.ppid.id_len = sizeof(ds->index);
 593                 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
 594                 break;
 595         default:
 596                 return -EOPNOTSUPP;
 597         }
 598
 599         return 0;
 600 }
 601
 602 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
 603                                                struct sk_buff *skb)
 604 {
 605 #ifdef CONFIG_NET_POLL_CONTROLLER
 606         if (p->netpoll)
 607                 netpoll_send_skb(p->netpoll, skb);
 608 #else
 609         BUG();
 610 #endif
 611         return NETDEV_TX_OK;
 612 }
 613
 614 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
 615 {
 616         struct dsa_slave_priv *p = netdev_priv(dev);
 617         struct sk_buff *nskb;
 618
 619         dev->stats.tx_packets++;
 620         dev->stats.tx_bytes += skb->len;
 621
 622         /* Transmit function may have to reallocate the original SKB */
 623         nskb = p->xmit(skb, dev);
 624         if (!nskb)
 625                 return NETDEV_TX_OK;
 626
 627         /* SKB for netpoll still need to be mangled with the protocol-specific
 628          * tag to be successfully transmitted
 629          */
 630         if (unlikely(netpoll_tx_running(dev)))
 631                 return dsa_netpoll_send_skb(p, nskb);
 632
 633         /* Queue the SKB for transmission on the parent interface, but
 634          * do not modify its EtherType
 635          */
 636         nskb->dev = p->parent->dst->master_netdev;
 637         dev_queue_xmit(nskb);
 638
 639         return NETDEV_TX_OK;
 640 }
 641
 642 /* ethtool operations *******************************************************/
 643 static int
 644 dsa_slave_get_link_ksettings(struct net_device *dev,
 645                              struct ethtool_link_ksettings *cmd)
 646 {
 647         struct dsa_slave_priv *p = netdev_priv(dev);
 648         int err;
 649
 650         err = -EOPNOTSUPP;
 651         if (p->phy != NULL) {
 652                 err = phy_read_status(p->phy);
 653                 if (err == 0)
 654                         err = phy_ethtool_ksettings_get(p->phy, cmd);
 655         }
 656
 657         return err;
 658 }
 659
 660 static int
 661 dsa_slave_set_link_ksettings(struct net_device *dev,
 662                              const struct ethtool_link_ksettings *cmd)
 663 {
 664         struct dsa_slave_priv *p = netdev_priv(dev);
 665
 666         if (p->phy != NULL)
 667                 return phy_ethtool_ksettings_set(p->phy, cmd);
 668
 669         return -EOPNOTSUPP;
 670 }
 671
 672 static void dsa_slave_get_drvinfo(struct net_device *dev,
 673                                   struct ethtool_drvinfo *drvinfo)
 674 {
 675         strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
 676         strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
 677         strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
 678 }
 679
 680 static int dsa_slave_get_regs_len(struct net_device *dev)
 681 {
 682         struct dsa_slave_priv *p = netdev_priv(dev);
 683         struct dsa_switch *ds = p->parent;
 684
 685         if (ds->ops->get_regs_len)
 686                 return ds->ops->get_regs_len(ds, p->port);
 687
 688         return -EOPNOTSUPP;
 689 }
 690
 691 static void
 692 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
 693 {
 694         struct dsa_slave_priv *p = netdev_priv(dev);
 695         struct dsa_switch *ds = p->parent;
 696
 697         if (ds->ops->get_regs)
 698                 ds->ops->get_regs(ds, p->port, regs, _p);
 699 }
 700
 701 static int dsa_slave_nway_reset(struct net_device *dev)
 702 {
 703         struct dsa_slave_priv *p = netdev_priv(dev);
 704
 705         if (p->phy != NULL)
 706                 return genphy_restart_aneg(p->phy);
 707
 708         return -EOPNOTSUPP;
 709 }
 710
 711 static u32 dsa_slave_get_link(struct net_device *dev)
 712 {
 713         struct dsa_slave_priv *p = netdev_priv(dev);
 714
 715         if (p->phy != NULL) {
 716                 genphy_update_link(p->phy);
 717                 return p->phy->link;
 718         }
 719
 720         return -EOPNOTSUPP;
 721 }
 722
 723 static int dsa_slave_get_eeprom_len(struct net_device *dev)
 724 {
 725         struct dsa_slave_priv *p = netdev_priv(dev);
 726         struct dsa_switch *ds = p->parent;
 727
 728         if (ds->cd && ds->cd->eeprom_len)
 729                 return ds->cd->eeprom_len;
 730
 731         if (ds->ops->get_eeprom_len)
 732                 return ds->ops->get_eeprom_len(ds);
 733
 734         return 0;
 735 }
 736
 737 static int dsa_slave_get_eeprom(struct net_device *dev,
 738                                 struct ethtool_eeprom *eeprom, u8 *data)
 739 {
 740         struct dsa_slave_priv *p = netdev_priv(dev);
 741         struct dsa_switch *ds = p->parent;
 742
 743         if (ds->ops->get_eeprom)
 744                 return ds->ops->get_eeprom(ds, eeprom, data);
 745
 746         return -EOPNOTSUPP;
 747 }
 748
 749 static int dsa_slave_set_eeprom(struct net_device *dev,
 750                                 struct ethtool_eeprom *eeprom, u8 *data)
 751 {
 752         struct dsa_slave_priv *p = netdev_priv(dev);
 753         struct dsa_switch *ds = p->parent;
 754
 755         if (ds->ops->set_eeprom)
 756                 return ds->ops->set_eeprom(ds, eeprom, data);
 757
 758         return -EOPNOTSUPP;
 759 }
 760
 761 static void dsa_slave_get_strings(struct net_device *dev,
 762                                   uint32_t stringset, uint8_t *data)
 763 {
 764         struct dsa_slave_priv *p = netdev_priv(dev);
 765         struct dsa_switch *ds = p->parent;
 766
 767         if (stringset == ETH_SS_STATS) {
 768                 int len = ETH_GSTRING_LEN;
 769
 770                 strncpy(data, "tx_packets", len);
 771                 strncpy(data + len, "tx_bytes", len);
 772                 strncpy(data + 2 * len, "rx_packets", len);
 773                 strncpy(data + 3 * len, "rx_bytes", len);
 774                 if (ds->ops->get_strings)
 775                         ds->ops->get_strings(ds, p->port, data + 4 * len);
 776         }
 777 }
 778
 779 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev,
 780                                            struct ethtool_stats *stats,
 781                                            uint64_t *data)
 782 {
 783         struct dsa_switch_tree *dst = dev->dsa_ptr;
 784         struct dsa_switch *ds = dst->cpu_switch;
 785         s8 cpu_port = dst->cpu_port;
 786         int count = 0;
 787
 788         if (dst->master_ethtool_ops.get_sset_count) {
 789                 count = dst->master_ethtool_ops.get_sset_count(dev,
 790                                                                ETH_SS_STATS);
 791                 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data);
 792         }
 793
 794         if (ds->ops->get_ethtool_stats)
 795                 ds->ops->get_ethtool_stats(ds, cpu_port, data + count);
 796 }
 797
 798 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset)
 799 {
 800         struct dsa_switch_tree *dst = dev->dsa_ptr;
 801         struct dsa_switch *ds = dst->cpu_switch;
 802         int count = 0;
 803
 804         if (dst->master_ethtool_ops.get_sset_count)
 805                 count += dst->master_ethtool_ops.get_sset_count(dev, sset);
 806
 807         if (sset == ETH_SS_STATS && ds->ops->get_sset_count)
 808                 count += ds->ops->get_sset_count(ds);
 809
 810         return count;
 811 }
 812
 813 static void dsa_cpu_port_get_strings(struct net_device *dev,
 814                                      uint32_t stringset, uint8_t *data)
 815 {
 816         struct dsa_switch_tree *dst = dev->dsa_ptr;
 817         struct dsa_switch *ds = dst->cpu_switch;
 818         s8 cpu_port = dst->cpu_port;
 819         int len = ETH_GSTRING_LEN;
 820         int mcount = 0, count;
 821         unsigned int i;
 822         uint8_t pfx[4];
 823         uint8_t *ndata;
 824
 825         snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port);
 826         /* We do not want to be NULL-terminated, since this is a prefix */
 827         pfx[sizeof(pfx) - 1] = '_';
 828
 829         if (dst->master_ethtool_ops.get_sset_count) {
 830                 mcount = dst->master_ethtool_ops.get_sset_count(dev,
 831                                                                 ETH_SS_STATS);
 832                 dst->master_ethtool_ops.get_strings(dev, stringset, data);
 833         }
 834
 835         if (stringset == ETH_SS_STATS && ds->ops->get_strings) {
 836                 ndata = data + mcount * len;
 837                 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
 838                  * the output after to prepend our CPU port prefix we
 839                  * constructed earlier
 840                  */
 841                 ds->ops->get_strings(ds, cpu_port, ndata);
 842                 count = ds->ops->get_sset_count(ds);
 843                 for (i = 0; i < count; i++) {
 844                         memmove(ndata + (i * len + sizeof(pfx)),
 845                                 ndata + i * len, len - sizeof(pfx));
 846                         memcpy(ndata + i * len, pfx, sizeof(pfx));
 847                 }
 848         }
 849 }
 850
 851 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 852                                         struct ethtool_stats *stats,
 853                                         uint64_t *data)
 854 {
 855         struct dsa_slave_priv *p = netdev_priv(dev);
 856         struct dsa_switch *ds = p->parent;
 857
 858         data[0] = dev->stats.tx_packets;
 859         data[1] = dev->stats.tx_bytes;
 860         data[2] = dev->stats.rx_packets;
 861         data[3] = dev->stats.rx_bytes;
 862         if (ds->ops->get_ethtool_stats)
 863                 ds->ops->get_ethtool_stats(ds, p->port, data + 4);
 864 }
 865
 866 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 867 {
 868         struct dsa_slave_priv *p = netdev_priv(dev);
 869         struct dsa_switch *ds = p->parent;
 870
 871         if (sset == ETH_SS_STATS) {
 872                 int count;
 873
 874                 count = 4;
 875                 if (ds->ops->get_sset_count)
 876                         count += ds->ops->get_sset_count(ds);
 877
 878                 return count;
 879         }
 880
 881         return -EOPNOTSUPP;
 882 }
 883
 884 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 885 {
 886         struct dsa_slave_priv *p = netdev_priv(dev);
 887         struct dsa_switch *ds = p->parent;
 888
 889         if (ds->ops->get_wol)
 890                 ds->ops->get_wol(ds, p->port, w);
 891 }
 892
 893 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 894 {
 895         struct dsa_slave_priv *p = netdev_priv(dev);
 896         struct dsa_switch *ds = p->parent;
 897         int ret = -EOPNOTSUPP;
 898
 899         if (ds->ops->set_wol)
 900                 ret = ds->ops->set_wol(ds, p->port, w);
 901
 902         return ret;
 903 }
 904
 905 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 906 {
 907         struct dsa_slave_priv *p = netdev_priv(dev);
 908         struct dsa_switch *ds = p->parent;
 909         int ret;
 910
 911         if (!ds->ops->set_eee)
 912                 return -EOPNOTSUPP;
 913
 914         ret = ds->ops->set_eee(ds, p->port, p->phy, e);
 915         if (ret)
 916                 return ret;
 917
 918         if (p->phy)
 919                 ret = phy_ethtool_set_eee(p->phy, e);
 920
 921         return ret;
 922 }
 923
 924 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 925 {
 926         struct dsa_slave_priv *p = netdev_priv(dev);
 927         struct dsa_switch *ds = p->parent;
 928         int ret;
 929
 930         if (!ds->ops->get_eee)
 931                 return -EOPNOTSUPP;
 932
 933         ret = ds->ops->get_eee(ds, p->port, e);
 934         if (ret)
 935                 return ret;
 936
 937         if (p->phy)
 938                 ret = phy_ethtool_get_eee(p->phy, e);
 939
 940         return ret;
 941 }
 942
 943 #ifdef CONFIG_NET_POLL_CONTROLLER
 944 static int dsa_slave_netpoll_setup(struct net_device *dev,
 945                                    struct netpoll_info *ni)
 946 {
 947         struct dsa_slave_priv *p = netdev_priv(dev);
 948         struct dsa_switch *ds = p->parent;
 949         struct net_device *master = ds->dst->master_netdev;
 950         struct netpoll *netpoll;
 951         int err = 0;
 952
 953         netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
 954         if (!netpoll)
 955                 return -ENOMEM;
 956
 957         err = __netpoll_setup(netpoll, master);
 958         if (err) {
 959                 kfree(netpoll);
 960                 goto out;
 961         }
 962
 963         p->netpoll = netpoll;
 964 out:
 965         return err;
 966 }
 967
 968 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
 969 {
 970         struct dsa_slave_priv *p = netdev_priv(dev);
 971         struct netpoll *netpoll = p->netpoll;
 972
 973         if (!netpoll)
 974                 return;
 975
 976         p->netpoll = NULL;
 977
 978         __netpoll_free_async(netpoll);
 979 }
 980
 981 static void dsa_slave_poll_controller(struct net_device *dev)
 982 {
 983 }
 984 #endif
 985
 986 static int dsa_slave_get_phys_port_name(struct net_device *dev,
 987                                         char *name, size_t len)
 988 {
 989         struct dsa_slave_priv *p = netdev_priv(dev);
 990
 991         if (snprintf(name, len, "p%d", p->port) >= len)
 992                 return -EINVAL;
 993
 994         return 0;
 995 }
 996
 997 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops)
 998 {
 999         ops->get_sset_count = dsa_cpu_port_get_sset_count;
1000         ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats;
1001         ops->get_strings = dsa_cpu_port_get_strings;
1002 }
1003
1004 static const struct ethtool_ops dsa_slave_ethtool_ops = {
1005         .get_drvinfo            = dsa_slave_get_drvinfo,
1006         .get_regs_len           = dsa_slave_get_regs_len,
1007         .get_regs               = dsa_slave_get_regs,
1008         .nway_reset             = dsa_slave_nway_reset,
1009         .get_link               = dsa_slave_get_link,
1010         .get_eeprom_len         = dsa_slave_get_eeprom_len,
1011         .get_eeprom             = dsa_slave_get_eeprom,
1012         .set_eeprom             = dsa_slave_set_eeprom,
1013         .get_strings            = dsa_slave_get_strings,
1014         .get_ethtool_stats      = dsa_slave_get_ethtool_stats,
1015         .get_sset_count         = dsa_slave_get_sset_count,
1016         .set_wol                = dsa_slave_set_wol,
1017         .get_wol                = dsa_slave_get_wol,
1018         .set_eee                = dsa_slave_set_eee,
1019         .get_eee                = dsa_slave_get_eee,
1020         .get_link_ksettings     = dsa_slave_get_link_ksettings,
1021         .set_link_ksettings     = dsa_slave_set_link_ksettings,
1022 };
1023
1024 static const struct net_device_ops dsa_slave_netdev_ops = {
1025         .ndo_open               = dsa_slave_open,
1026         .ndo_stop               = dsa_slave_close,
1027         .ndo_start_xmit         = dsa_slave_xmit,
1028         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
1029         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
1030         .ndo_set_mac_address    = dsa_slave_set_mac_address,
1031         .ndo_fdb_add            = switchdev_port_fdb_add,
1032         .ndo_fdb_del            = switchdev_port_fdb_del,
1033         .ndo_fdb_dump           = switchdev_port_fdb_dump,
1034         .ndo_do_ioctl           = dsa_slave_ioctl,
1035         .ndo_get_iflink         = dsa_slave_get_iflink,
1036 #ifdef CONFIG_NET_POLL_CONTROLLER
1037         .ndo_netpoll_setup      = dsa_slave_netpoll_setup,
1038         .ndo_netpoll_cleanup    = dsa_slave_netpoll_cleanup,
1039         .ndo_poll_controller    = dsa_slave_poll_controller,
1040 #endif
1041         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
1042         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
1043         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
1044         .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
1045 };
1046
1047 static const struct switchdev_ops dsa_slave_switchdev_ops = {
1048         .switchdev_port_attr_get        = dsa_slave_port_attr_get,
1049         .switchdev_port_attr_set        = dsa_slave_port_attr_set,
1050         .switchdev_port_obj_add         = dsa_slave_port_obj_add,
1051         .switchdev_port_obj_del         = dsa_slave_port_obj_del,
1052         .switchdev_port_obj_dump        = dsa_slave_port_obj_dump,
1053 };
1054
1055 static struct device_type dsa_type = {
1056         .name   = "dsa",
1057 };
1058
1059 static void dsa_slave_adjust_link(struct net_device *dev)
1060 {
1061         struct dsa_slave_priv *p = netdev_priv(dev);
1062         struct dsa_switch *ds = p->parent;
1063         unsigned int status_changed = 0;
1064
1065         if (p->old_link != p->phy->link) {
1066                 status_changed = 1;
1067                 p->old_link = p->phy->link;
1068         }
1069
1070         if (p->old_duplex != p->phy->duplex) {
1071                 status_changed = 1;
1072                 p->old_duplex = p->phy->duplex;
1073         }
1074
1075         if (p->old_pause != p->phy->pause) {
1076                 status_changed = 1;
1077                 p->old_pause = p->phy->pause;
1078         }
1079
1080         if (ds->ops->adjust_link && status_changed)
1081                 ds->ops->adjust_link(ds, p->port, p->phy);
1082
1083         if (status_changed)
1084                 phy_print_status(p->phy);
1085 }
1086
1087 static int dsa_slave_fixed_link_update(struct net_device *dev,
1088                                        struct fixed_phy_status *status)
1089 {
1090         struct dsa_slave_priv *p;
1091         struct dsa_switch *ds;
1092
1093         if (dev) {
1094                 p = netdev_priv(dev);
1095                 ds = p->parent;
1096                 if (ds->ops->fixed_link_update)
1097                         ds->ops->fixed_link_update(ds, p->port, status);
1098         }
1099
1100         return 0;
1101 }
1102
1103 /* slave device setup *******************************************************/
1104 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
1105                                  struct net_device *slave_dev,
1106                                  int addr)
1107 {
1108         struct dsa_switch *ds = p->parent;
1109
1110         p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
1111         if (!p->phy) {
1112                 netdev_err(slave_dev, "no phy at %d\n", addr);
1113                 return -ENODEV;
1114         }
1115
1116         /* Use already configured phy mode */
1117         if (p->phy_interface == PHY_INTERFACE_MODE_NA)
1118                 p->phy_interface = p->phy->interface;
1119         phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
1120                            p->phy_interface);
1121
1122         return 0;
1123 }
1124
1125 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
1126                                 struct net_device *slave_dev)
1127 {
1128         struct dsa_switch *ds = p->parent;
1129         struct device_node *phy_dn, *port_dn;
1130         bool phy_is_fixed = false;
1131         u32 phy_flags = 0;
1132         int mode, ret;
1133
1134         port_dn = ds->ports[p->port].dn;
1135         mode = of_get_phy_mode(port_dn);
1136         if (mode < 0)
1137                 mode = PHY_INTERFACE_MODE_NA;
1138         p->phy_interface = mode;
1139
1140         phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
1141         if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
1142                 /* In the case of a fixed PHY, the DT node associated
1143                  * to the fixed PHY is the Port DT node
1144                  */
1145                 ret = of_phy_register_fixed_link(port_dn);
1146                 if (ret) {
1147                         netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
1148                         return ret;
1149                 }
1150                 phy_is_fixed = true;
1151                 phy_dn = of_node_get(port_dn);
1152         }
1153
1154         if (ds->ops->get_phy_flags)
1155                 phy_flags = ds->ops->get_phy_flags(ds, p->port);
1156
1157         if (phy_dn) {
1158                 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
1159
1160                 /* If this PHY address is part of phys_mii_mask, which means
1161                  * that we need to divert reads and writes to/from it, then we
1162                  * want to bind this device using the slave MII bus created by
1163                  * DSA to make that happen.
1164                  */
1165                 if (!phy_is_fixed && phy_id >= 0 &&
1166                     (ds->phys_mii_mask & (1 << phy_id))) {
1167                         ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
1168                         if (ret) {
1169                                 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
1170                                 of_node_put(phy_dn);
1171                                 return ret;
1172                         }
1173                 } else {
1174                         p->phy = of_phy_connect(slave_dev, phy_dn,
1175                                                 dsa_slave_adjust_link,
1176                                                 phy_flags,
1177                                                 p->phy_interface);
1178                 }
1179
1180                 of_node_put(phy_dn);
1181         }
1182
1183         if (p->phy && phy_is_fixed)
1184                 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
1185
1186         /* We could not connect to a designated PHY, so use the switch internal
1187          * MDIO bus instead
1188          */
1189         if (!p->phy) {
1190                 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
1191                 if (ret) {
1192                         netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
1193                         if (phy_is_fixed)
1194                                 of_phy_deregister_fixed_link(port_dn);
1195                         return ret;
1196                 }
1197         }
1198
1199         phy_attached_info(p->phy);
1200
1201         return 0;
1202 }
1203
1204 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1205 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1206                                             struct netdev_queue *txq,
1207                                             void *_unused)
1208 {
1209         lockdep_set_class(&txq->_xmit_lock,
1210                           &dsa_slave_netdev_xmit_lock_key);
1211 }
1212
1213 int dsa_slave_suspend(struct net_device *slave_dev)
1214 {
1215         struct dsa_slave_priv *p = netdev_priv(slave_dev);
1216
1217         if (p->phy) {
1218                 phy_stop(p->phy);
1219                 p->old_pause = -1;
1220                 p->old_link = -1;
1221                 p->old_duplex = -1;
1222                 phy_suspend(p->phy);
1223         }
1224
1225         return 0;
1226 }
1227
1228 int dsa_slave_resume(struct net_device *slave_dev)
1229 {
1230         struct dsa_slave_priv *p = netdev_priv(slave_dev);
1231
1232         netif_device_attach(slave_dev);
1233
1234         if (p->phy) {
1235                 phy_resume(p->phy);
1236                 phy_start(p->phy);
1237         }
1238
1239         return 0;
1240 }
1241
1242 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1243                      int port, const char *name)
1244 {
1245         struct dsa_switch_tree *dst = ds->dst;
1246         struct net_device *master;
1247         struct net_device *slave_dev;
1248         struct dsa_slave_priv *p;
1249         int ret;
1250
1251         master = ds->dst->master_netdev;
1252         if (ds->master_netdev)
1253                 master = ds->master_netdev;
1254
1255         slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1256                                  NET_NAME_UNKNOWN, ether_setup);
1257         if (slave_dev == NULL)
1258                 return -ENOMEM;
1259
1260         slave_dev->features = master->vlan_features;
1261         slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1262         eth_hw_addr_inherit(slave_dev, master);
1263         slave_dev->priv_flags |= IFF_NO_QUEUE;
1264         slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1265         slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1266         slave_dev->min_mtu = 0;
1267         slave_dev->max_mtu = ETH_MAX_MTU;
1268         SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1269
1270         netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1271                                  NULL);
1272
1273         SET_NETDEV_DEV(slave_dev, parent);
1274         slave_dev->dev.of_node = ds->ports[port].dn;
1275         slave_dev->vlan_features = master->vlan_features;
1276
1277         p = netdev_priv(slave_dev);
1278         p->parent = ds;
1279         p->port = port;
1280         p->xmit = dst->tag_ops->xmit;
1281
1282         p->old_pause = -1;
1283         p->old_link = -1;
1284         p->old_duplex = -1;
1285
1286         ds->ports[port].netdev = slave_dev;
1287         ret = register_netdev(slave_dev);
1288         if (ret) {
1289                 netdev_err(master, "error %d registering interface %s\n",
1290                            ret, slave_dev->name);
1291                 ds->ports[port].netdev = NULL;
1292                 free_netdev(slave_dev);
1293                 return ret;
1294         }
1295
1296         netif_carrier_off(slave_dev);
1297
1298         ret = dsa_slave_phy_setup(p, slave_dev);
1299         if (ret) {
1300                 netdev_err(master, "error %d setting up slave phy\n", ret);
1301                 unregister_netdev(slave_dev);
1302                 free_netdev(slave_dev);
1303                 return ret;
1304         }
1305
1306         return 0;
1307 }
1308
1309 void dsa_slave_destroy(struct net_device *slave_dev)
1310 {
1311         struct dsa_slave_priv *p = netdev_priv(slave_dev);
1312         struct dsa_switch *ds = p->parent;
1313         struct device_node *port_dn;
1314
1315         port_dn = ds->ports[p->port].dn;
1316
1317         netif_carrier_off(slave_dev);
1318         if (p->phy) {
1319                 phy_disconnect(p->phy);
1320
1321                 if (of_phy_is_fixed_link(port_dn))
1322                         of_phy_deregister_fixed_link(port_dn);
1323         }
1324         unregister_netdev(slave_dev);
1325         free_netdev(slave_dev);
1326 }
1327
1328 static bool dsa_slave_dev_check(struct net_device *dev)
1329 {
1330         return dev->netdev_ops == &dsa_slave_netdev_ops;
1331 }
1332
1333 static int dsa_slave_port_upper_event(struct net_device *dev,
1334                                       unsigned long event, void *ptr)
1335 {
1336         struct netdev_notifier_changeupper_info *info = ptr;
1337         struct net_device *upper = info->upper_dev;
1338         int err = 0;
1339
1340         switch (event) {
1341         case NETDEV_CHANGEUPPER:
1342                 if (netif_is_bridge_master(upper)) {
1343                         if (info->linking)
1344                                 err = dsa_slave_bridge_port_join(dev, upper);
1345                         else
1346                                 dsa_slave_bridge_port_leave(dev);
1347                 }
1348
1349                 break;
1350         }
1351
1352         return notifier_from_errno(err);
1353 }
1354
1355 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1356                                 void *ptr)
1357 {
1358         switch (event) {
1359         case NETDEV_CHANGEUPPER:
1360                 return dsa_slave_port_upper_event(dev, event, ptr);
1361         }
1362
1363         return NOTIFY_DONE;
1364 }
1365
1366 int dsa_slave_netdevice_event(struct notifier_block *unused,
1367                               unsigned long event, void *ptr)
1368 {
1369         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1370
1371         if (dsa_slave_dev_check(dev))
1372                 return dsa_slave_port_event(dev, event, ptr);
1373
1374         return NOTIFY_DONE;
1375 }