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->drv->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->drv->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:%.2x",
  53                         ds->index, ds->pd->sw_addr);
  54         ds->slave_mii_bus->parent = ds->master_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 int dsa_slave_open(struct net_device *dev)
  73 {
  74         struct dsa_slave_priv *p = netdev_priv(dev);
  75         struct net_device *master = p->parent->dst->master_netdev;
  76         struct dsa_switch *ds = p->parent;
  77         u8 stp_state = dsa_port_is_bridged(p) ?
  78                         BR_STATE_BLOCKING : BR_STATE_FORWARDING;
  79         int err;
  80
  81         if (!(master->flags & IFF_UP))
  82                 return -ENETDOWN;
  83
  84         if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
  85                 err = dev_uc_add(master, dev->dev_addr);
  86                 if (err < 0)
  87                         goto out;
  88         }
  89
  90         if (dev->flags & IFF_ALLMULTI) {
  91                 err = dev_set_allmulti(master, 1);
  92                 if (err < 0)
  93                         goto del_unicast;
  94         }
  95         if (dev->flags & IFF_PROMISC) {
  96                 err = dev_set_promiscuity(master, 1);
  97                 if (err < 0)
  98                         goto clear_allmulti;
  99         }
 100
 101         if (ds->drv->port_enable) {
 102                 err = ds->drv->port_enable(ds, p->port, p->phy);
 103                 if (err)
 104                         goto clear_promisc;
 105         }
 106
 107         if (ds->drv->port_stp_update)
 108                 ds->drv->port_stp_update(ds, p->port, stp_state);
 109
 110         if (p->phy)
 111                 phy_start(p->phy);
 112
 113         return 0;
 114
 115 clear_promisc:
 116         if (dev->flags & IFF_PROMISC)
 117                 dev_set_promiscuity(master, -1);
 118 clear_allmulti:
 119         if (dev->flags & IFF_ALLMULTI)
 120                 dev_set_allmulti(master, -1);
 121 del_unicast:
 122         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 123                 dev_uc_del(master, dev->dev_addr);
 124 out:
 125         return err;
 126 }
 127
 128 static int dsa_slave_close(struct net_device *dev)
 129 {
 130         struct dsa_slave_priv *p = netdev_priv(dev);
 131         struct net_device *master = p->parent->dst->master_netdev;
 132         struct dsa_switch *ds = p->parent;
 133
 134         if (p->phy)
 135                 phy_stop(p->phy);
 136
 137         dev_mc_unsync(master, dev);
 138         dev_uc_unsync(master, dev);
 139         if (dev->flags & IFF_ALLMULTI)
 140                 dev_set_allmulti(master, -1);
 141         if (dev->flags & IFF_PROMISC)
 142                 dev_set_promiscuity(master, -1);
 143
 144         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 145                 dev_uc_del(master, dev->dev_addr);
 146
 147         if (ds->drv->port_disable)
 148                 ds->drv->port_disable(ds, p->port, p->phy);
 149
 150         if (ds->drv->port_stp_update)
 151                 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
 152
 153         return 0;
 154 }
 155
 156 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
 157 {
 158         struct dsa_slave_priv *p = netdev_priv(dev);
 159         struct net_device *master = p->parent->dst->master_netdev;
 160
 161         if (change & IFF_ALLMULTI)
 162                 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
 163         if (change & IFF_PROMISC)
 164                 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
 165 }
 166
 167 static void dsa_slave_set_rx_mode(struct net_device *dev)
 168 {
 169         struct dsa_slave_priv *p = netdev_priv(dev);
 170         struct net_device *master = p->parent->dst->master_netdev;
 171
 172         dev_mc_sync(master, dev);
 173         dev_uc_sync(master, dev);
 174 }
 175
 176 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
 177 {
 178         struct dsa_slave_priv *p = netdev_priv(dev);
 179         struct net_device *master = p->parent->dst->master_netdev;
 180         struct sockaddr *addr = a;
 181         int err;
 182
 183         if (!is_valid_ether_addr(addr->sa_data))
 184                 return -EADDRNOTAVAIL;
 185
 186         if (!(dev->flags & IFF_UP))
 187                 goto out;
 188
 189         if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
 190                 err = dev_uc_add(master, addr->sa_data);
 191                 if (err < 0)
 192                         return err;
 193         }
 194
 195         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 196                 dev_uc_del(master, dev->dev_addr);
 197
 198 out:
 199         ether_addr_copy(dev->dev_addr, addr->sa_data);
 200
 201         return 0;
 202 }
 203
 204 static int dsa_slave_port_vlan_add(struct net_device *dev,
 205                                    const struct switchdev_obj_port_vlan *vlan,
 206                                    struct switchdev_trans *trans)
 207 {
 208         struct dsa_slave_priv *p = netdev_priv(dev);
 209         struct dsa_switch *ds = p->parent;
 210         int err;
 211
 212         if (switchdev_trans_ph_prepare(trans)) {
 213                 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
 214                         return -EOPNOTSUPP;
 215
 216                 err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
 217                 if (err)
 218                         return err;
 219         } else {
 220                 err = ds->drv->port_vlan_add(ds, p->port, vlan, trans);
 221                 if (err)
 222                         return err;
 223         }
 224
 225         return 0;
 226 }
 227
 228 static int dsa_slave_port_vlan_del(struct net_device *dev,
 229                                    const struct switchdev_obj_port_vlan *vlan)
 230 {
 231         struct dsa_slave_priv *p = netdev_priv(dev);
 232         struct dsa_switch *ds = p->parent;
 233
 234         if (!ds->drv->port_vlan_del)
 235                 return -EOPNOTSUPP;
 236
 237         return ds->drv->port_vlan_del(ds, p->port, vlan);
 238 }
 239
 240 static int dsa_slave_port_vlan_dump(struct net_device *dev,
 241                                     struct switchdev_obj_port_vlan *vlan,
 242                                     switchdev_obj_dump_cb_t *cb)
 243 {
 244         struct dsa_slave_priv *p = netdev_priv(dev);
 245         struct dsa_switch *ds = p->parent;
 246
 247         if (ds->drv->port_vlan_dump)
 248                 return ds->drv->port_vlan_dump(ds, p->port, vlan, cb);
 249
 250         return -EOPNOTSUPP;
 251 }
 252
 253 static int dsa_slave_port_fdb_add(struct net_device *dev,
 254                                   const struct switchdev_obj_port_fdb *fdb,
 255                                   struct switchdev_trans *trans)
 256 {
 257         struct dsa_slave_priv *p = netdev_priv(dev);
 258         struct dsa_switch *ds = p->parent;
 259         int ret;
 260
 261         if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
 262                 return -EOPNOTSUPP;
 263
 264         if (switchdev_trans_ph_prepare(trans))
 265                 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
 266         else
 267                 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans);
 268
 269         return ret;
 270 }
 271
 272 static int dsa_slave_port_fdb_del(struct net_device *dev,
 273                                   const struct switchdev_obj_port_fdb *fdb)
 274 {
 275         struct dsa_slave_priv *p = netdev_priv(dev);
 276         struct dsa_switch *ds = p->parent;
 277         int ret = -EOPNOTSUPP;
 278
 279         if (ds->drv->port_fdb_del)
 280                 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
 281
 282         return ret;
 283 }
 284
 285 static int dsa_slave_port_fdb_dump(struct net_device *dev,
 286                                    struct switchdev_obj_port_fdb *fdb,
 287                                    switchdev_obj_dump_cb_t *cb)
 288 {
 289         struct dsa_slave_priv *p = netdev_priv(dev);
 290         struct dsa_switch *ds = p->parent;
 291
 292         if (ds->drv->port_fdb_dump)
 293                 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
 294
 295         return -EOPNOTSUPP;
 296 }
 297
 298 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 299 {
 300         struct dsa_slave_priv *p = netdev_priv(dev);
 301
 302         if (p->phy != NULL)
 303                 return phy_mii_ioctl(p->phy, ifr, cmd);
 304
 305         return -EOPNOTSUPP;
 306 }
 307
 308 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
 309 {
 310         struct dsa_slave_priv *p = netdev_priv(dev);
 311         struct dsa_switch *ds = p->parent;
 312         int ret = -EOPNOTSUPP;
 313
 314         if (ds->drv->port_stp_update)
 315                 ret = ds->drv->port_stp_update(ds, p->port, state);
 316
 317         return ret;
 318 }
 319
 320 static int dsa_slave_vlan_filtering(struct net_device *dev,
 321                                     const struct switchdev_attr *attr,
 322                                     struct switchdev_trans *trans)
 323 {
 324         struct dsa_slave_priv *p = netdev_priv(dev);
 325         struct dsa_switch *ds = p->parent;
 326
 327         /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
 328         if (switchdev_trans_ph_prepare(trans))
 329                 return 0;
 330
 331         if (ds->drv->port_vlan_filtering)
 332                 return ds->drv->port_vlan_filtering(ds, p->port,
 333                                                     attr->u.vlan_filtering);
 334
 335         return 0;
 336 }
 337
 338 static int dsa_slave_port_attr_set(struct net_device *dev,
 339                                    const struct switchdev_attr *attr,
 340                                    struct switchdev_trans *trans)
 341 {
 342         struct dsa_slave_priv *p = netdev_priv(dev);
 343         struct dsa_switch *ds = p->parent;
 344         int ret;
 345
 346         switch (attr->id) {
 347         case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
 348                 if (switchdev_trans_ph_prepare(trans))
 349                         ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP;
 350                 else
 351                         ret = ds->drv->port_stp_update(ds, p->port,
 352                                                        attr->u.stp_state);
 353                 break;
 354         case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
 355                 ret = dsa_slave_vlan_filtering(dev, attr, trans);
 356                 break;
 357         default:
 358                 ret = -EOPNOTSUPP;
 359                 break;
 360         }
 361
 362         return ret;
 363 }
 364
 365 static int dsa_slave_port_obj_add(struct net_device *dev,
 366                                   const struct switchdev_obj *obj,
 367                                   struct switchdev_trans *trans)
 368 {
 369         int err;
 370
 371         /* For the prepare phase, ensure the full set of changes is feasable in
 372          * one go in order to signal a failure properly. If an operation is not
 373          * supported, return -EOPNOTSUPP.
 374          */
 375
 376         switch (obj->id) {
 377         case SWITCHDEV_OBJ_ID_PORT_FDB:
 378                 err = dsa_slave_port_fdb_add(dev,
 379                                              SWITCHDEV_OBJ_PORT_FDB(obj),
 380                                              trans);
 381                 break;
 382         case SWITCHDEV_OBJ_ID_PORT_VLAN:
 383                 err = dsa_slave_port_vlan_add(dev,
 384                                               SWITCHDEV_OBJ_PORT_VLAN(obj),
 385                                               trans);
 386                 break;
 387         default:
 388                 err = -EOPNOTSUPP;
 389                 break;
 390         }
 391
 392         return err;
 393 }
 394
 395 static int dsa_slave_port_obj_del(struct net_device *dev,
 396                                   const struct switchdev_obj *obj)
 397 {
 398         int err;
 399
 400         switch (obj->id) {
 401         case SWITCHDEV_OBJ_ID_PORT_FDB:
 402                 err = dsa_slave_port_fdb_del(dev,
 403                                              SWITCHDEV_OBJ_PORT_FDB(obj));
 404                 break;
 405         case SWITCHDEV_OBJ_ID_PORT_VLAN:
 406                 err = dsa_slave_port_vlan_del(dev,
 407                                               SWITCHDEV_OBJ_PORT_VLAN(obj));
 408                 break;
 409         default:
 410                 err = -EOPNOTSUPP;
 411                 break;
 412         }
 413
 414         return err;
 415 }
 416
 417 static int dsa_slave_port_obj_dump(struct net_device *dev,
 418                                    struct switchdev_obj *obj,
 419                                    switchdev_obj_dump_cb_t *cb)
 420 {
 421         int err;
 422
 423         switch (obj->id) {
 424         case SWITCHDEV_OBJ_ID_PORT_FDB:
 425                 err = dsa_slave_port_fdb_dump(dev,
 426                                               SWITCHDEV_OBJ_PORT_FDB(obj),
 427                                               cb);
 428                 break;
 429         case SWITCHDEV_OBJ_ID_PORT_VLAN:
 430                 err = dsa_slave_port_vlan_dump(dev,
 431                                                SWITCHDEV_OBJ_PORT_VLAN(obj),
 432                                                cb);
 433                 break;
 434         default:
 435                 err = -EOPNOTSUPP;
 436                 break;
 437         }
 438
 439         return err;
 440 }
 441
 442 static int dsa_slave_bridge_port_join(struct net_device *dev,
 443                                       struct net_device *br)
 444 {
 445         struct dsa_slave_priv *p = netdev_priv(dev);
 446         struct dsa_switch *ds = p->parent;
 447         int ret = -EOPNOTSUPP;
 448
 449         p->bridge_dev = br;
 450
 451         if (ds->drv->port_bridge_join)
 452                 ret = ds->drv->port_bridge_join(ds, p->port, br);
 453
 454         return ret == -EOPNOTSUPP ? 0 : ret;
 455 }
 456
 457 static void dsa_slave_bridge_port_leave(struct net_device *dev)
 458 {
 459         struct dsa_slave_priv *p = netdev_priv(dev);
 460         struct dsa_switch *ds = p->parent;
 461
 462
 463         if (ds->drv->port_bridge_leave)
 464                 ds->drv->port_bridge_leave(ds, p->port);
 465
 466         p->bridge_dev = NULL;
 467
 468         /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
 469          * so allow it to be in BR_STATE_FORWARDING to be kept functional
 470          */
 471         dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
 472 }
 473
 474 static int dsa_slave_port_attr_get(struct net_device *dev,
 475                                    struct switchdev_attr *attr)
 476 {
 477         struct dsa_slave_priv *p = netdev_priv(dev);
 478         struct dsa_switch *ds = p->parent;
 479
 480         switch (attr->id) {
 481         case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
 482                 attr->u.ppid.id_len = sizeof(ds->index);
 483                 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
 484                 break;
 485         default:
 486                 return -EOPNOTSUPP;
 487         }
 488
 489         return 0;
 490 }
 491
 492 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
 493                                                struct sk_buff *skb)
 494 {
 495 #ifdef CONFIG_NET_POLL_CONTROLLER
 496         if (p->netpoll)
 497                 netpoll_send_skb(p->netpoll, skb);
 498 #else
 499         BUG();
 500 #endif
 501         return NETDEV_TX_OK;
 502 }
 503
 504 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
 505 {
 506         struct dsa_slave_priv *p = netdev_priv(dev);
 507         struct sk_buff *nskb;
 508
 509         dev->stats.tx_packets++;
 510         dev->stats.tx_bytes += skb->len;
 511
 512         /* Transmit function may have to reallocate the original SKB */
 513         nskb = p->xmit(skb, dev);
 514         if (!nskb)
 515                 return NETDEV_TX_OK;
 516
 517         /* SKB for netpoll still need to be mangled with the protocol-specific
 518          * tag to be successfully transmitted
 519          */
 520         if (unlikely(netpoll_tx_running(dev)))
 521                 return dsa_netpoll_send_skb(p, nskb);
 522
 523         /* Queue the SKB for transmission on the parent interface, but
 524          * do not modify its EtherType
 525          */
 526         nskb->dev = p->parent->dst->master_netdev;
 527         dev_queue_xmit(nskb);
 528
 529         return NETDEV_TX_OK;
 530 }
 531
 532 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
 533                                             struct net_device *dev)
 534 {
 535         /* Just return the original SKB */
 536         return skb;
 537 }
 538
 539
 540 /* ethtool operations *******************************************************/
 541 static int
 542 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 543 {
 544         struct dsa_slave_priv *p = netdev_priv(dev);
 545         int err;
 546
 547         err = -EOPNOTSUPP;
 548         if (p->phy != NULL) {
 549                 err = phy_read_status(p->phy);
 550                 if (err == 0)
 551                         err = phy_ethtool_gset(p->phy, cmd);
 552         }
 553
 554         return err;
 555 }
 556
 557 static int
 558 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 559 {
 560         struct dsa_slave_priv *p = netdev_priv(dev);
 561
 562         if (p->phy != NULL)
 563                 return phy_ethtool_sset(p->phy, cmd);
 564
 565         return -EOPNOTSUPP;
 566 }
 567
 568 static void dsa_slave_get_drvinfo(struct net_device *dev,
 569                                   struct ethtool_drvinfo *drvinfo)
 570 {
 571         strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
 572         strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
 573         strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
 574         strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
 575 }
 576
 577 static int dsa_slave_get_regs_len(struct net_device *dev)
 578 {
 579         struct dsa_slave_priv *p = netdev_priv(dev);
 580         struct dsa_switch *ds = p->parent;
 581
 582         if (ds->drv->get_regs_len)
 583                 return ds->drv->get_regs_len(ds, p->port);
 584
 585         return -EOPNOTSUPP;
 586 }
 587
 588 static void
 589 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
 590 {
 591         struct dsa_slave_priv *p = netdev_priv(dev);
 592         struct dsa_switch *ds = p->parent;
 593
 594         if (ds->drv->get_regs)
 595                 ds->drv->get_regs(ds, p->port, regs, _p);
 596 }
 597
 598 static int dsa_slave_nway_reset(struct net_device *dev)
 599 {
 600         struct dsa_slave_priv *p = netdev_priv(dev);
 601
 602         if (p->phy != NULL)
 603                 return genphy_restart_aneg(p->phy);
 604
 605         return -EOPNOTSUPP;
 606 }
 607
 608 static u32 dsa_slave_get_link(struct net_device *dev)
 609 {
 610         struct dsa_slave_priv *p = netdev_priv(dev);
 611
 612         if (p->phy != NULL) {
 613                 genphy_update_link(p->phy);
 614                 return p->phy->link;
 615         }
 616
 617         return -EOPNOTSUPP;
 618 }
 619
 620 static int dsa_slave_get_eeprom_len(struct net_device *dev)
 621 {
 622         struct dsa_slave_priv *p = netdev_priv(dev);
 623         struct dsa_switch *ds = p->parent;
 624
 625         if (ds->pd->eeprom_len)
 626                 return ds->pd->eeprom_len;
 627
 628         if (ds->drv->get_eeprom_len)
 629                 return ds->drv->get_eeprom_len(ds);
 630
 631         return 0;
 632 }
 633
 634 static int dsa_slave_get_eeprom(struct net_device *dev,
 635                                 struct ethtool_eeprom *eeprom, u8 *data)
 636 {
 637         struct dsa_slave_priv *p = netdev_priv(dev);
 638         struct dsa_switch *ds = p->parent;
 639
 640         if (ds->drv->get_eeprom)
 641                 return ds->drv->get_eeprom(ds, eeprom, data);
 642
 643         return -EOPNOTSUPP;
 644 }
 645
 646 static int dsa_slave_set_eeprom(struct net_device *dev,
 647                                 struct ethtool_eeprom *eeprom, u8 *data)
 648 {
 649         struct dsa_slave_priv *p = netdev_priv(dev);
 650         struct dsa_switch *ds = p->parent;
 651
 652         if (ds->drv->set_eeprom)
 653                 return ds->drv->set_eeprom(ds, eeprom, data);
 654
 655         return -EOPNOTSUPP;
 656 }
 657
 658 static void dsa_slave_get_strings(struct net_device *dev,
 659                                   uint32_t stringset, uint8_t *data)
 660 {
 661         struct dsa_slave_priv *p = netdev_priv(dev);
 662         struct dsa_switch *ds = p->parent;
 663
 664         if (stringset == ETH_SS_STATS) {
 665                 int len = ETH_GSTRING_LEN;
 666
 667                 strncpy(data, "tx_packets", len);
 668                 strncpy(data + len, "tx_bytes", len);
 669                 strncpy(data + 2 * len, "rx_packets", len);
 670                 strncpy(data + 3 * len, "rx_bytes", len);
 671                 if (ds->drv->get_strings != NULL)
 672                         ds->drv->get_strings(ds, p->port, data + 4 * len);
 673         }
 674 }
 675
 676 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 677                                         struct ethtool_stats *stats,
 678                                         uint64_t *data)
 679 {
 680         struct dsa_slave_priv *p = netdev_priv(dev);
 681         struct dsa_switch *ds = p->parent;
 682
 683         data[0] = p->dev->stats.tx_packets;
 684         data[1] = p->dev->stats.tx_bytes;
 685         data[2] = p->dev->stats.rx_packets;
 686         data[3] = p->dev->stats.rx_bytes;
 687         if (ds->drv->get_ethtool_stats != NULL)
 688                 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
 689 }
 690
 691 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 692 {
 693         struct dsa_slave_priv *p = netdev_priv(dev);
 694         struct dsa_switch *ds = p->parent;
 695
 696         if (sset == ETH_SS_STATS) {
 697                 int count;
 698
 699                 count = 4;
 700                 if (ds->drv->get_sset_count != NULL)
 701                         count += ds->drv->get_sset_count(ds);
 702
 703                 return count;
 704         }
 705
 706         return -EOPNOTSUPP;
 707 }
 708
 709 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 710 {
 711         struct dsa_slave_priv *p = netdev_priv(dev);
 712         struct dsa_switch *ds = p->parent;
 713
 714         if (ds->drv->get_wol)
 715                 ds->drv->get_wol(ds, p->port, w);
 716 }
 717
 718 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 719 {
 720         struct dsa_slave_priv *p = netdev_priv(dev);
 721         struct dsa_switch *ds = p->parent;
 722         int ret = -EOPNOTSUPP;
 723
 724         if (ds->drv->set_wol)
 725                 ret = ds->drv->set_wol(ds, p->port, w);
 726
 727         return ret;
 728 }
 729
 730 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 731 {
 732         struct dsa_slave_priv *p = netdev_priv(dev);
 733         struct dsa_switch *ds = p->parent;
 734         int ret;
 735
 736         if (!ds->drv->set_eee)
 737                 return -EOPNOTSUPP;
 738
 739         ret = ds->drv->set_eee(ds, p->port, p->phy, e);
 740         if (ret)
 741                 return ret;
 742
 743         if (p->phy)
 744                 ret = phy_ethtool_set_eee(p->phy, e);
 745
 746         return ret;
 747 }
 748
 749 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 750 {
 751         struct dsa_slave_priv *p = netdev_priv(dev);
 752         struct dsa_switch *ds = p->parent;
 753         int ret;
 754
 755         if (!ds->drv->get_eee)
 756                 return -EOPNOTSUPP;
 757
 758         ret = ds->drv->get_eee(ds, p->port, e);
 759         if (ret)
 760                 return ret;
 761
 762         if (p->phy)
 763                 ret = phy_ethtool_get_eee(p->phy, e);
 764
 765         return ret;
 766 }
 767
 768 #ifdef CONFIG_NET_POLL_CONTROLLER
 769 static int dsa_slave_netpoll_setup(struct net_device *dev,
 770                                    struct netpoll_info *ni)
 771 {
 772         struct dsa_slave_priv *p = netdev_priv(dev);
 773         struct dsa_switch *ds = p->parent;
 774         struct net_device *master = ds->dst->master_netdev;
 775         struct netpoll *netpoll;
 776         int err = 0;
 777
 778         netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
 779         if (!netpoll)
 780                 return -ENOMEM;
 781
 782         err = __netpoll_setup(netpoll, master);
 783         if (err) {
 784                 kfree(netpoll);
 785                 goto out;
 786         }
 787
 788         p->netpoll = netpoll;
 789 out:
 790         return err;
 791 }
 792
 793 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
 794 {
 795         struct dsa_slave_priv *p = netdev_priv(dev);
 796         struct netpoll *netpoll = p->netpoll;
 797
 798         if (!netpoll)
 799                 return;
 800
 801         p->netpoll = NULL;
 802
 803         __netpoll_free_async(netpoll);
 804 }
 805
 806 static void dsa_slave_poll_controller(struct net_device *dev)
 807 {
 808 }
 809 #endif
 810
 811 static const struct ethtool_ops dsa_slave_ethtool_ops = {
 812         .get_settings           = dsa_slave_get_settings,
 813         .set_settings           = dsa_slave_set_settings,
 814         .get_drvinfo            = dsa_slave_get_drvinfo,
 815         .get_regs_len           = dsa_slave_get_regs_len,
 816         .get_regs               = dsa_slave_get_regs,
 817         .nway_reset             = dsa_slave_nway_reset,
 818         .get_link               = dsa_slave_get_link,
 819         .get_eeprom_len         = dsa_slave_get_eeprom_len,
 820         .get_eeprom             = dsa_slave_get_eeprom,
 821         .set_eeprom             = dsa_slave_set_eeprom,
 822         .get_strings            = dsa_slave_get_strings,
 823         .get_ethtool_stats      = dsa_slave_get_ethtool_stats,
 824         .get_sset_count         = dsa_slave_get_sset_count,
 825         .set_wol                = dsa_slave_set_wol,
 826         .get_wol                = dsa_slave_get_wol,
 827         .set_eee                = dsa_slave_set_eee,
 828         .get_eee                = dsa_slave_get_eee,
 829 };
 830
 831 static const struct net_device_ops dsa_slave_netdev_ops = {
 832         .ndo_open               = dsa_slave_open,
 833         .ndo_stop               = dsa_slave_close,
 834         .ndo_start_xmit         = dsa_slave_xmit,
 835         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
 836         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
 837         .ndo_set_mac_address    = dsa_slave_set_mac_address,
 838         .ndo_fdb_add            = switchdev_port_fdb_add,
 839         .ndo_fdb_del            = switchdev_port_fdb_del,
 840         .ndo_fdb_dump           = switchdev_port_fdb_dump,
 841         .ndo_do_ioctl           = dsa_slave_ioctl,
 842         .ndo_get_iflink         = dsa_slave_get_iflink,
 843 #ifdef CONFIG_NET_POLL_CONTROLLER
 844         .ndo_netpoll_setup      = dsa_slave_netpoll_setup,
 845         .ndo_netpoll_cleanup    = dsa_slave_netpoll_cleanup,
 846         .ndo_poll_controller    = dsa_slave_poll_controller,
 847 #endif
 848         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
 849         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
 850         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
 851 };
 852
 853 static const struct switchdev_ops dsa_slave_switchdev_ops = {
 854         .switchdev_port_attr_get        = dsa_slave_port_attr_get,
 855         .switchdev_port_attr_set        = dsa_slave_port_attr_set,
 856         .switchdev_port_obj_add         = dsa_slave_port_obj_add,
 857         .switchdev_port_obj_del         = dsa_slave_port_obj_del,
 858         .switchdev_port_obj_dump        = dsa_slave_port_obj_dump,
 859 };
 860
 861 static struct device_type dsa_type = {
 862         .name   = "dsa",
 863 };
 864
 865 static void dsa_slave_adjust_link(struct net_device *dev)
 866 {
 867         struct dsa_slave_priv *p = netdev_priv(dev);
 868         struct dsa_switch *ds = p->parent;
 869         unsigned int status_changed = 0;
 870
 871         if (p->old_link != p->phy->link) {
 872                 status_changed = 1;
 873                 p->old_link = p->phy->link;
 874         }
 875
 876         if (p->old_duplex != p->phy->duplex) {
 877                 status_changed = 1;
 878                 p->old_duplex = p->phy->duplex;
 879         }
 880
 881         if (p->old_pause != p->phy->pause) {
 882                 status_changed = 1;
 883                 p->old_pause = p->phy->pause;
 884         }
 885
 886         if (ds->drv->adjust_link && status_changed)
 887                 ds->drv->adjust_link(ds, p->port, p->phy);
 888
 889         if (status_changed)
 890                 phy_print_status(p->phy);
 891 }
 892
 893 static int dsa_slave_fixed_link_update(struct net_device *dev,
 894                                        struct fixed_phy_status *status)
 895 {
 896         struct dsa_slave_priv *p;
 897         struct dsa_switch *ds;
 898
 899         if (dev) {
 900                 p = netdev_priv(dev);
 901                 ds = p->parent;
 902                 if (ds->drv->fixed_link_update)
 903                         ds->drv->fixed_link_update(ds, p->port, status);
 904         }
 905
 906         return 0;
 907 }
 908
 909 /* slave device setup *******************************************************/
 910 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
 911                                  struct net_device *slave_dev,
 912                                  int addr)
 913 {
 914         struct dsa_switch *ds = p->parent;
 915
 916         p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
 917         if (!p->phy) {
 918                 netdev_err(slave_dev, "no phy at %d\n", addr);
 919                 return -ENODEV;
 920         }
 921
 922         /* Use already configured phy mode */
 923         if (p->phy_interface == PHY_INTERFACE_MODE_NA)
 924                 p->phy_interface = p->phy->interface;
 925         phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
 926                            p->phy_interface);
 927
 928         return 0;
 929 }
 930
 931 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 932                                 struct net_device *slave_dev)
 933 {
 934         struct dsa_switch *ds = p->parent;
 935         struct dsa_chip_data *cd = ds->pd;
 936         struct device_node *phy_dn, *port_dn;
 937         bool phy_is_fixed = false;
 938         u32 phy_flags = 0;
 939         int mode, ret;
 940
 941         port_dn = cd->port_dn[p->port];
 942         mode = of_get_phy_mode(port_dn);
 943         if (mode < 0)
 944                 mode = PHY_INTERFACE_MODE_NA;
 945         p->phy_interface = mode;
 946
 947         phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
 948         if (of_phy_is_fixed_link(port_dn)) {
 949                 /* In the case of a fixed PHY, the DT node associated
 950                  * to the fixed PHY is the Port DT node
 951                  */
 952                 ret = of_phy_register_fixed_link(port_dn);
 953                 if (ret) {
 954                         netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
 955                         return ret;
 956                 }
 957                 phy_is_fixed = true;
 958                 phy_dn = port_dn;
 959         }
 960
 961         if (ds->drv->get_phy_flags)
 962                 phy_flags = ds->drv->get_phy_flags(ds, p->port);
 963
 964         if (phy_dn) {
 965                 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
 966
 967                 /* If this PHY address is part of phys_mii_mask, which means
 968                  * that we need to divert reads and writes to/from it, then we
 969                  * want to bind this device using the slave MII bus created by
 970                  * DSA to make that happen.
 971                  */
 972                 if (!phy_is_fixed && phy_id >= 0 &&
 973                     (ds->phys_mii_mask & (1 << phy_id))) {
 974                         ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
 975                         if (ret) {
 976                                 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
 977                                 return ret;
 978                         }
 979                 } else {
 980                         p->phy = of_phy_connect(slave_dev, phy_dn,
 981                                                 dsa_slave_adjust_link,
 982                                                 phy_flags,
 983                                                 p->phy_interface);
 984                 }
 985         }
 986
 987         if (p->phy && phy_is_fixed)
 988                 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
 989
 990         /* We could not connect to a designated PHY, so use the switch internal
 991          * MDIO bus instead
 992          */
 993         if (!p->phy) {
 994                 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
 995                 if (ret) {
 996                         netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
 997                         return ret;
 998                 }
 999         }
1000
1001         phy_attached_info(p->phy);
1002
1003         return 0;
1004 }
1005
1006 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1007 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1008                                             struct netdev_queue *txq,
1009                                             void *_unused)
1010 {
1011         lockdep_set_class(&txq->_xmit_lock,
1012                           &dsa_slave_netdev_xmit_lock_key);
1013 }
1014
1015 int dsa_slave_suspend(struct net_device *slave_dev)
1016 {
1017         struct dsa_slave_priv *p = netdev_priv(slave_dev);
1018
1019         if (p->phy) {
1020                 phy_stop(p->phy);
1021                 p->old_pause = -1;
1022                 p->old_link = -1;
1023                 p->old_duplex = -1;
1024                 phy_suspend(p->phy);
1025         }
1026
1027         return 0;
1028 }
1029
1030 int dsa_slave_resume(struct net_device *slave_dev)
1031 {
1032         struct dsa_slave_priv *p = netdev_priv(slave_dev);
1033
1034         netif_device_attach(slave_dev);
1035
1036         if (p->phy) {
1037                 phy_resume(p->phy);
1038                 phy_start(p->phy);
1039         }
1040
1041         return 0;
1042 }
1043
1044 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1045                      int port, char *name)
1046 {
1047         struct net_device *master = ds->dst->master_netdev;
1048         struct net_device *slave_dev;
1049         struct dsa_slave_priv *p;
1050         int ret;
1051
1052         slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1053                                  NET_NAME_UNKNOWN, ether_setup);
1054         if (slave_dev == NULL)
1055                 return -ENOMEM;
1056
1057         slave_dev->features = master->vlan_features;
1058         slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1059         eth_hw_addr_inherit(slave_dev, master);
1060         slave_dev->priv_flags |= IFF_NO_QUEUE;
1061         slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1062         slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1063         SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1064
1065         netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1066                                  NULL);
1067
1068         SET_NETDEV_DEV(slave_dev, parent);
1069         slave_dev->dev.of_node = ds->pd->port_dn[port];
1070         slave_dev->vlan_features = master->vlan_features;
1071
1072         p = netdev_priv(slave_dev);
1073         p->dev = slave_dev;
1074         p->parent = ds;
1075         p->port = port;
1076
1077         switch (ds->dst->tag_protocol) {
1078 #ifdef CONFIG_NET_DSA_TAG_DSA
1079         case DSA_TAG_PROTO_DSA:
1080                 p->xmit = dsa_netdev_ops.xmit;
1081                 break;
1082 #endif
1083 #ifdef CONFIG_NET_DSA_TAG_EDSA
1084         case DSA_TAG_PROTO_EDSA:
1085                 p->xmit = edsa_netdev_ops.xmit;
1086                 break;
1087 #endif
1088 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1089         case DSA_TAG_PROTO_TRAILER:
1090                 p->xmit = trailer_netdev_ops.xmit;
1091                 break;
1092 #endif
1093 #ifdef CONFIG_NET_DSA_TAG_BRCM
1094         case DSA_TAG_PROTO_BRCM:
1095                 p->xmit = brcm_netdev_ops.xmit;
1096                 break;
1097 #endif
1098         default:
1099                 p->xmit = dsa_slave_notag_xmit;
1100                 break;
1101         }
1102
1103         p->old_pause = -1;
1104         p->old_link = -1;
1105         p->old_duplex = -1;
1106
1107         ds->ports[port] = slave_dev;
1108         ret = register_netdev(slave_dev);
1109         if (ret) {
1110                 netdev_err(master, "error %d registering interface %s\n",
1111                            ret, slave_dev->name);
1112                 ds->ports[port] = NULL;
1113                 free_netdev(slave_dev);
1114                 return ret;
1115         }
1116
1117         netif_carrier_off(slave_dev);
1118
1119         ret = dsa_slave_phy_setup(p, slave_dev);
1120         if (ret) {
1121                 netdev_err(master, "error %d setting up slave phy\n", ret);
1122                 unregister_netdev(slave_dev);
1123                 free_netdev(slave_dev);
1124                 return ret;
1125         }
1126
1127         return 0;
1128 }
1129
1130 void dsa_slave_destroy(struct net_device *slave_dev)
1131 {
1132         struct dsa_slave_priv *p = netdev_priv(slave_dev);
1133
1134         netif_carrier_off(slave_dev);
1135         if (p->phy)
1136                 phy_disconnect(p->phy);
1137         unregister_netdev(slave_dev);
1138         free_netdev(slave_dev);
1139 }
1140
1141 static bool dsa_slave_dev_check(struct net_device *dev)
1142 {
1143         return dev->netdev_ops == &dsa_slave_netdev_ops;
1144 }
1145
1146 static int dsa_slave_port_upper_event(struct net_device *dev,
1147                                       unsigned long event, void *ptr)
1148 {
1149         struct netdev_notifier_changeupper_info *info = ptr;
1150         struct net_device *upper = info->upper_dev;
1151         int err = 0;
1152
1153         switch (event) {
1154         case NETDEV_CHANGEUPPER:
1155                 if (netif_is_bridge_master(upper)) {
1156                         if (info->linking)
1157                                 err = dsa_slave_bridge_port_join(dev, upper);
1158                         else
1159                                 dsa_slave_bridge_port_leave(dev);
1160                 }
1161
1162                 break;
1163         }
1164
1165         return notifier_from_errno(err);
1166 }
1167
1168 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1169                                 void *ptr)
1170 {
1171         switch (event) {
1172         case NETDEV_CHANGEUPPER:
1173                 return dsa_slave_port_upper_event(dev, event, ptr);
1174         }
1175
1176         return NOTIFY_DONE;
1177 }
1178
1179 int dsa_slave_netdevice_event(struct notifier_block *unused,
1180                               unsigned long event, void *ptr)
1181 {
1182         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1183
1184         if (dsa_slave_dev_check(dev))
1185                 return dsa_slave_port_event(dev, event, ptr);
1186
1187         return NOTIFY_DONE;
1188 }