kernel/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 <net/rtnetlink.h>
  19 #include <net/switchdev.h>
  20 #include <linux/if_bridge.h>
  21 #include "dsa_priv.h"
  22
  23 /* slave mii_bus handling ***************************************************/
  24 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
  25 {
  26         struct dsa_switch *ds = bus->priv;
  27
  28         if (ds->phys_mii_mask & (1 << addr))
  29                 return ds->drv->phy_read(ds, addr, reg);
  30
  31         return 0xffff;
  32 }
  33
  34 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
  35 {
  36         struct dsa_switch *ds = bus->priv;
  37
  38         if (ds->phys_mii_mask & (1 << addr))
  39                 return ds->drv->phy_write(ds, addr, reg, val);
  40
  41         return 0;
  42 }
  43
  44 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
  45 {
  46         ds->slave_mii_bus->priv = (void *)ds;
  47         ds->slave_mii_bus->name = "dsa slave smi";
  48         ds->slave_mii_bus->read = dsa_slave_phy_read;
  49         ds->slave_mii_bus->write = dsa_slave_phy_write;
  50         snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
  51                         ds->index, ds->pd->sw_addr);
  52         ds->slave_mii_bus->parent = ds->master_dev;
  53         ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
  54 }
  55
  56
  57 /* slave device handling ****************************************************/
  58 static int dsa_slave_get_iflink(const struct net_device *dev)
  59 {
  60         struct dsa_slave_priv *p = netdev_priv(dev);
  61
  62         return p->parent->dst->master_netdev->ifindex;
  63 }
  64
  65 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
  66 {
  67         return !!p->bridge_dev;
  68 }
  69
  70 static int dsa_slave_open(struct net_device *dev)
  71 {
  72         struct dsa_slave_priv *p = netdev_priv(dev);
  73         struct net_device *master = p->parent->dst->master_netdev;
  74         struct dsa_switch *ds = p->parent;
  75         u8 stp_state = dsa_port_is_bridged(p) ?
  76                         BR_STATE_BLOCKING : BR_STATE_FORWARDING;
  77         int err;
  78
  79         if (!(master->flags & IFF_UP))
  80                 return -ENETDOWN;
  81
  82         if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
  83                 err = dev_uc_add(master, dev->dev_addr);
  84                 if (err < 0)
  85                         goto out;
  86         }
  87
  88         if (dev->flags & IFF_ALLMULTI) {
  89                 err = dev_set_allmulti(master, 1);
  90                 if (err < 0)
  91                         goto del_unicast;
  92         }
  93         if (dev->flags & IFF_PROMISC) {
  94                 err = dev_set_promiscuity(master, 1);
  95                 if (err < 0)
  96                         goto clear_allmulti;
  97         }
  98
  99         if (ds->drv->port_enable) {
 100                 err = ds->drv->port_enable(ds, p->port, p->phy);
 101                 if (err)
 102                         goto clear_promisc;
 103         }
 104
 105         if (ds->drv->port_stp_update)
 106                 ds->drv->port_stp_update(ds, p->port, stp_state);
 107
 108         if (p->phy)
 109                 phy_start(p->phy);
 110
 111         return 0;
 112
 113 clear_promisc:
 114         if (dev->flags & IFF_PROMISC)
 115                 dev_set_promiscuity(master, 0);
 116 clear_allmulti:
 117         if (dev->flags & IFF_ALLMULTI)
 118                 dev_set_allmulti(master, -1);
 119 del_unicast:
 120         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 121                 dev_uc_del(master, dev->dev_addr);
 122 out:
 123         return err;
 124 }
 125
 126 static int dsa_slave_close(struct net_device *dev)
 127 {
 128         struct dsa_slave_priv *p = netdev_priv(dev);
 129         struct net_device *master = p->parent->dst->master_netdev;
 130         struct dsa_switch *ds = p->parent;
 131
 132         if (p->phy)
 133                 phy_stop(p->phy);
 134
 135         dev_mc_unsync(master, dev);
 136         dev_uc_unsync(master, dev);
 137         if (dev->flags & IFF_ALLMULTI)
 138                 dev_set_allmulti(master, -1);
 139         if (dev->flags & IFF_PROMISC)
 140                 dev_set_promiscuity(master, -1);
 141
 142         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 143                 dev_uc_del(master, dev->dev_addr);
 144
 145         if (ds->drv->port_disable)
 146                 ds->drv->port_disable(ds, p->port, p->phy);
 147
 148         if (ds->drv->port_stp_update)
 149                 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED);
 150
 151         return 0;
 152 }
 153
 154 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
 155 {
 156         struct dsa_slave_priv *p = netdev_priv(dev);
 157         struct net_device *master = p->parent->dst->master_netdev;
 158
 159         if (change & IFF_ALLMULTI)
 160                 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
 161         if (change & IFF_PROMISC)
 162                 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
 163 }
 164
 165 static void dsa_slave_set_rx_mode(struct net_device *dev)
 166 {
 167         struct dsa_slave_priv *p = netdev_priv(dev);
 168         struct net_device *master = p->parent->dst->master_netdev;
 169
 170         dev_mc_sync(master, dev);
 171         dev_uc_sync(master, dev);
 172 }
 173
 174 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
 175 {
 176         struct dsa_slave_priv *p = netdev_priv(dev);
 177         struct net_device *master = p->parent->dst->master_netdev;
 178         struct sockaddr *addr = a;
 179         int err;
 180
 181         if (!is_valid_ether_addr(addr->sa_data))
 182                 return -EADDRNOTAVAIL;
 183
 184         if (!(dev->flags & IFF_UP))
 185                 goto out;
 186
 187         if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
 188                 err = dev_uc_add(master, addr->sa_data);
 189                 if (err < 0)
 190                         return err;
 191         }
 192
 193         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 194                 dev_uc_del(master, dev->dev_addr);
 195
 196 out:
 197         ether_addr_copy(dev->dev_addr, addr->sa_data);
 198
 199         return 0;
 200 }
 201
 202 static int dsa_slave_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 203                              struct net_device *dev,
 204                              const unsigned char *addr, u16 vid, u16 nlm_flags)
 205 {
 206         struct dsa_slave_priv *p = netdev_priv(dev);
 207         struct dsa_switch *ds = p->parent;
 208         int ret = -EOPNOTSUPP;
 209
 210         if (ds->drv->fdb_add)
 211                 ret = ds->drv->fdb_add(ds, p->port, addr, vid);
 212
 213         return ret;
 214 }
 215
 216 static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 217                              struct net_device *dev,
 218                              const unsigned char *addr, u16 vid)
 219 {
 220         struct dsa_slave_priv *p = netdev_priv(dev);
 221         struct dsa_switch *ds = p->parent;
 222         int ret = -EOPNOTSUPP;
 223
 224         if (ds->drv->fdb_del)
 225                 ret = ds->drv->fdb_del(ds, p->port, addr, vid);
 226
 227         return ret;
 228 }
 229
 230 static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb,
 231                                const unsigned char *addr, u16 vid,
 232                                bool is_static,
 233                                u32 portid, u32 seq, int type,
 234                                unsigned int flags)
 235 {
 236         struct nlmsghdr *nlh;
 237         struct ndmsg *ndm;
 238
 239         nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
 240         if (!nlh)
 241                 return -EMSGSIZE;
 242
 243         ndm = nlmsg_data(nlh);
 244         ndm->ndm_family  = AF_BRIDGE;
 245         ndm->ndm_pad1    = 0;
 246         ndm->ndm_pad2    = 0;
 247         ndm->ndm_flags   = NTF_EXT_LEARNED;
 248         ndm->ndm_type    = 0;
 249         ndm->ndm_ifindex = dev->ifindex;
 250         ndm->ndm_state   = is_static ? NUD_NOARP : NUD_REACHABLE;
 251
 252         if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
 253                 goto nla_put_failure;
 254
 255         if (vid && nla_put_u16(skb, NDA_VLAN, vid))
 256                 goto nla_put_failure;
 257
 258         nlmsg_end(skb, nlh);
 259         return 0;
 260
 261 nla_put_failure:
 262         nlmsg_cancel(skb, nlh);
 263         return -EMSGSIZE;
 264 }
 265
 266 /* Dump information about entries, in response to GETNEIGH */
 267 static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 268                               struct net_device *dev,
 269                               struct net_device *filter_dev, int idx)
 270 {
 271         struct dsa_slave_priv *p = netdev_priv(dev);
 272         struct dsa_switch *ds = p->parent;
 273         unsigned char addr[ETH_ALEN] = { 0 };
 274         int ret;
 275
 276         if (!ds->drv->fdb_getnext)
 277                 return -EOPNOTSUPP;
 278
 279         for (; ; idx++) {
 280                 bool is_static;
 281
 282                 ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static);
 283                 if (ret < 0)
 284                         break;
 285
 286                 if (idx < cb->args[0])
 287                         continue;
 288
 289                 ret = dsa_slave_fill_info(dev, skb, addr, 0,
 290                                           is_static,
 291                                           NETLINK_CB(cb->skb).portid,
 292                                           cb->nlh->nlmsg_seq,
 293                                           RTM_NEWNEIGH, NLM_F_MULTI);
 294                 if (ret < 0)
 295                         break;
 296         }
 297
 298         return idx;
 299 }
 300
 301 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 302 {
 303         struct dsa_slave_priv *p = netdev_priv(dev);
 304
 305         if (p->phy != NULL)
 306                 return phy_mii_ioctl(p->phy, ifr, cmd);
 307
 308         return -EOPNOTSUPP;
 309 }
 310
 311 /* Return a bitmask of all ports being currently bridged within a given bridge
 312  * device. Note that on leave, the mask will still return the bitmask of ports
 313  * currently bridged, prior to port removal, and this is exactly what we want.
 314  */
 315 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
 316                                   struct net_device *bridge)
 317 {
 318         struct dsa_slave_priv *p;
 319         unsigned int port;
 320         u32 mask = 0;
 321
 322         for (port = 0; port < DSA_MAX_PORTS; port++) {
 323                 if (!dsa_is_port_initialized(ds, port))
 324                         continue;
 325
 326                 p = netdev_priv(ds->ports[port]);
 327
 328                 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
 329                     p->bridge_dev == bridge)
 330                         mask |= 1 << port;
 331         }
 332
 333         return mask;
 334 }
 335
 336 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
 337 {
 338         struct dsa_slave_priv *p = netdev_priv(dev);
 339         struct dsa_switch *ds = p->parent;
 340         int ret = -EOPNOTSUPP;
 341
 342         if (ds->drv->port_stp_update)
 343                 ret = ds->drv->port_stp_update(ds, p->port, state);
 344
 345         return ret;
 346 }
 347
 348 static int dsa_slave_bridge_port_join(struct net_device *dev,
 349                                       struct net_device *br)
 350 {
 351         struct dsa_slave_priv *p = netdev_priv(dev);
 352         struct dsa_switch *ds = p->parent;
 353         int ret = -EOPNOTSUPP;
 354
 355         p->bridge_dev = br;
 356
 357         if (ds->drv->port_join_bridge)
 358                 ret = ds->drv->port_join_bridge(ds, p->port,
 359                                                 dsa_slave_br_port_mask(ds, br));
 360
 361         return ret;
 362 }
 363
 364 static int dsa_slave_bridge_port_leave(struct net_device *dev)
 365 {
 366         struct dsa_slave_priv *p = netdev_priv(dev);
 367         struct dsa_switch *ds = p->parent;
 368         int ret = -EOPNOTSUPP;
 369
 370
 371         if (ds->drv->port_leave_bridge)
 372                 ret = ds->drv->port_leave_bridge(ds, p->port,
 373                                                  dsa_slave_br_port_mask(ds, p->bridge_dev));
 374
 375         p->bridge_dev = NULL;
 376
 377         /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
 378          * so allow it to be in BR_STATE_FORWARDING to be kept functional
 379          */
 380         dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
 381
 382         return ret;
 383 }
 384
 385 static int dsa_slave_parent_id_get(struct net_device *dev,
 386                                    struct netdev_phys_item_id *psid)
 387 {
 388         struct dsa_slave_priv *p = netdev_priv(dev);
 389         struct dsa_switch *ds = p->parent;
 390
 391         psid->id_len = sizeof(ds->index);
 392         memcpy(&psid->id, &ds->index, psid->id_len);
 393
 394         return 0;
 395 }
 396
 397 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
 398 {
 399         struct dsa_slave_priv *p = netdev_priv(dev);
 400
 401         return p->xmit(skb, dev);
 402 }
 403
 404 static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
 405                                         struct net_device *dev)
 406 {
 407         struct dsa_slave_priv *p = netdev_priv(dev);
 408
 409         skb->dev = p->parent->dst->master_netdev;
 410         dev_queue_xmit(skb);
 411
 412         return NETDEV_TX_OK;
 413 }
 414
 415
 416 /* ethtool operations *******************************************************/
 417 static int
 418 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 419 {
 420         struct dsa_slave_priv *p = netdev_priv(dev);
 421         int err;
 422
 423         err = -EOPNOTSUPP;
 424         if (p->phy != NULL) {
 425                 err = phy_read_status(p->phy);
 426                 if (err == 0)
 427                         err = phy_ethtool_gset(p->phy, cmd);
 428         }
 429
 430         return err;
 431 }
 432
 433 static int
 434 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 435 {
 436         struct dsa_slave_priv *p = netdev_priv(dev);
 437
 438         if (p->phy != NULL)
 439                 return phy_ethtool_sset(p->phy, cmd);
 440
 441         return -EOPNOTSUPP;
 442 }
 443
 444 static void dsa_slave_get_drvinfo(struct net_device *dev,
 445                                   struct ethtool_drvinfo *drvinfo)
 446 {
 447         strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
 448         strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
 449         strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
 450         strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
 451 }
 452
 453 static int dsa_slave_get_regs_len(struct net_device *dev)
 454 {
 455         struct dsa_slave_priv *p = netdev_priv(dev);
 456         struct dsa_switch *ds = p->parent;
 457
 458         if (ds->drv->get_regs_len)
 459                 return ds->drv->get_regs_len(ds, p->port);
 460
 461         return -EOPNOTSUPP;
 462 }
 463
 464 static void
 465 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
 466 {
 467         struct dsa_slave_priv *p = netdev_priv(dev);
 468         struct dsa_switch *ds = p->parent;
 469
 470         if (ds->drv->get_regs)
 471                 ds->drv->get_regs(ds, p->port, regs, _p);
 472 }
 473
 474 static int dsa_slave_nway_reset(struct net_device *dev)
 475 {
 476         struct dsa_slave_priv *p = netdev_priv(dev);
 477
 478         if (p->phy != NULL)
 479                 return genphy_restart_aneg(p->phy);
 480
 481         return -EOPNOTSUPP;
 482 }
 483
 484 static u32 dsa_slave_get_link(struct net_device *dev)
 485 {
 486         struct dsa_slave_priv *p = netdev_priv(dev);
 487
 488         if (p->phy != NULL) {
 489                 genphy_update_link(p->phy);
 490                 return p->phy->link;
 491         }
 492
 493         return -EOPNOTSUPP;
 494 }
 495
 496 static int dsa_slave_get_eeprom_len(struct net_device *dev)
 497 {
 498         struct dsa_slave_priv *p = netdev_priv(dev);
 499         struct dsa_switch *ds = p->parent;
 500
 501         if (ds->pd->eeprom_len)
 502                 return ds->pd->eeprom_len;
 503
 504         if (ds->drv->get_eeprom_len)
 505                 return ds->drv->get_eeprom_len(ds);
 506
 507         return 0;
 508 }
 509
 510 static int dsa_slave_get_eeprom(struct net_device *dev,
 511                                 struct ethtool_eeprom *eeprom, u8 *data)
 512 {
 513         struct dsa_slave_priv *p = netdev_priv(dev);
 514         struct dsa_switch *ds = p->parent;
 515
 516         if (ds->drv->get_eeprom)
 517                 return ds->drv->get_eeprom(ds, eeprom, data);
 518
 519         return -EOPNOTSUPP;
 520 }
 521
 522 static int dsa_slave_set_eeprom(struct net_device *dev,
 523                                 struct ethtool_eeprom *eeprom, u8 *data)
 524 {
 525         struct dsa_slave_priv *p = netdev_priv(dev);
 526         struct dsa_switch *ds = p->parent;
 527
 528         if (ds->drv->set_eeprom)
 529                 return ds->drv->set_eeprom(ds, eeprom, data);
 530
 531         return -EOPNOTSUPP;
 532 }
 533
 534 static void dsa_slave_get_strings(struct net_device *dev,
 535                                   uint32_t stringset, uint8_t *data)
 536 {
 537         struct dsa_slave_priv *p = netdev_priv(dev);
 538         struct dsa_switch *ds = p->parent;
 539
 540         if (stringset == ETH_SS_STATS) {
 541                 int len = ETH_GSTRING_LEN;
 542
 543                 strncpy(data, "tx_packets", len);
 544                 strncpy(data + len, "tx_bytes", len);
 545                 strncpy(data + 2 * len, "rx_packets", len);
 546                 strncpy(data + 3 * len, "rx_bytes", len);
 547                 if (ds->drv->get_strings != NULL)
 548                         ds->drv->get_strings(ds, p->port, data + 4 * len);
 549         }
 550 }
 551
 552 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 553                                         struct ethtool_stats *stats,
 554                                         uint64_t *data)
 555 {
 556         struct dsa_slave_priv *p = netdev_priv(dev);
 557         struct dsa_switch *ds = p->parent;
 558
 559         data[0] = p->dev->stats.tx_packets;
 560         data[1] = p->dev->stats.tx_bytes;
 561         data[2] = p->dev->stats.rx_packets;
 562         data[3] = p->dev->stats.rx_bytes;
 563         if (ds->drv->get_ethtool_stats != NULL)
 564                 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
 565 }
 566
 567 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 568 {
 569         struct dsa_slave_priv *p = netdev_priv(dev);
 570         struct dsa_switch *ds = p->parent;
 571
 572         if (sset == ETH_SS_STATS) {
 573                 int count;
 574
 575                 count = 4;
 576                 if (ds->drv->get_sset_count != NULL)
 577                         count += ds->drv->get_sset_count(ds);
 578
 579                 return count;
 580         }
 581
 582         return -EOPNOTSUPP;
 583 }
 584
 585 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 586 {
 587         struct dsa_slave_priv *p = netdev_priv(dev);
 588         struct dsa_switch *ds = p->parent;
 589
 590         if (ds->drv->get_wol)
 591                 ds->drv->get_wol(ds, p->port, w);
 592 }
 593
 594 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 595 {
 596         struct dsa_slave_priv *p = netdev_priv(dev);
 597         struct dsa_switch *ds = p->parent;
 598         int ret = -EOPNOTSUPP;
 599
 600         if (ds->drv->set_wol)
 601                 ret = ds->drv->set_wol(ds, p->port, w);
 602
 603         return ret;
 604 }
 605
 606 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 607 {
 608         struct dsa_slave_priv *p = netdev_priv(dev);
 609         struct dsa_switch *ds = p->parent;
 610         int ret;
 611
 612         if (!ds->drv->set_eee)
 613                 return -EOPNOTSUPP;
 614
 615         ret = ds->drv->set_eee(ds, p->port, p->phy, e);
 616         if (ret)
 617                 return ret;
 618
 619         if (p->phy)
 620                 ret = phy_ethtool_set_eee(p->phy, e);
 621
 622         return ret;
 623 }
 624
 625 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 626 {
 627         struct dsa_slave_priv *p = netdev_priv(dev);
 628         struct dsa_switch *ds = p->parent;
 629         int ret;
 630
 631         if (!ds->drv->get_eee)
 632                 return -EOPNOTSUPP;
 633
 634         ret = ds->drv->get_eee(ds, p->port, e);
 635         if (ret)
 636                 return ret;
 637
 638         if (p->phy)
 639                 ret = phy_ethtool_get_eee(p->phy, e);
 640
 641         return ret;
 642 }
 643
 644 static const struct ethtool_ops dsa_slave_ethtool_ops = {
 645         .get_settings           = dsa_slave_get_settings,
 646         .set_settings           = dsa_slave_set_settings,
 647         .get_drvinfo            = dsa_slave_get_drvinfo,
 648         .get_regs_len           = dsa_slave_get_regs_len,
 649         .get_regs               = dsa_slave_get_regs,
 650         .nway_reset             = dsa_slave_nway_reset,
 651         .get_link               = dsa_slave_get_link,
 652         .get_eeprom_len         = dsa_slave_get_eeprom_len,
 653         .get_eeprom             = dsa_slave_get_eeprom,
 654         .set_eeprom             = dsa_slave_set_eeprom,
 655         .get_strings            = dsa_slave_get_strings,
 656         .get_ethtool_stats      = dsa_slave_get_ethtool_stats,
 657         .get_sset_count         = dsa_slave_get_sset_count,
 658         .set_wol                = dsa_slave_set_wol,
 659         .get_wol                = dsa_slave_get_wol,
 660         .set_eee                = dsa_slave_set_eee,
 661         .get_eee                = dsa_slave_get_eee,
 662 };
 663
 664 static const struct net_device_ops dsa_slave_netdev_ops = {
 665         .ndo_open               = dsa_slave_open,
 666         .ndo_stop               = dsa_slave_close,
 667         .ndo_start_xmit         = dsa_slave_xmit,
 668         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
 669         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
 670         .ndo_set_mac_address    = dsa_slave_set_mac_address,
 671         .ndo_fdb_add            = dsa_slave_fdb_add,
 672         .ndo_fdb_del            = dsa_slave_fdb_del,
 673         .ndo_fdb_dump           = dsa_slave_fdb_dump,
 674         .ndo_do_ioctl           = dsa_slave_ioctl,
 675         .ndo_get_iflink         = dsa_slave_get_iflink,
 676 };
 677
 678 static const struct swdev_ops dsa_slave_swdev_ops = {
 679         .swdev_parent_id_get = dsa_slave_parent_id_get,
 680         .swdev_port_stp_update = dsa_slave_stp_update,
 681 };
 682
 683 static void dsa_slave_adjust_link(struct net_device *dev)
 684 {
 685         struct dsa_slave_priv *p = netdev_priv(dev);
 686         struct dsa_switch *ds = p->parent;
 687         unsigned int status_changed = 0;
 688
 689         if (p->old_link != p->phy->link) {
 690                 status_changed = 1;
 691                 p->old_link = p->phy->link;
 692         }
 693
 694         if (p->old_duplex != p->phy->duplex) {
 695                 status_changed = 1;
 696                 p->old_duplex = p->phy->duplex;
 697         }
 698
 699         if (p->old_pause != p->phy->pause) {
 700                 status_changed = 1;
 701                 p->old_pause = p->phy->pause;
 702         }
 703
 704         if (ds->drv->adjust_link && status_changed)
 705                 ds->drv->adjust_link(ds, p->port, p->phy);
 706
 707         if (status_changed)
 708                 phy_print_status(p->phy);
 709 }
 710
 711 static int dsa_slave_fixed_link_update(struct net_device *dev,
 712                                        struct fixed_phy_status *status)
 713 {
 714         struct dsa_slave_priv *p = netdev_priv(dev);
 715         struct dsa_switch *ds = p->parent;
 716
 717         if (ds->drv->fixed_link_update)
 718                 ds->drv->fixed_link_update(ds, p->port, status);
 719
 720         return 0;
 721 }
 722
 723 /* slave device setup *******************************************************/
 724 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
 725                                  struct net_device *slave_dev,
 726                                  int addr)
 727 {
 728         struct dsa_switch *ds = p->parent;
 729
 730         p->phy = ds->slave_mii_bus->phy_map[addr];
 731         if (!p->phy)
 732                 return -ENODEV;
 733
 734         /* Use already configured phy mode */
 735         if (p->phy_interface == PHY_INTERFACE_MODE_NA)
 736                 p->phy_interface = p->phy->interface;
 737         phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
 738                            p->phy_interface);
 739
 740         return 0;
 741 }
 742
 743 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 744                                 struct net_device *slave_dev)
 745 {
 746         struct dsa_switch *ds = p->parent;
 747         struct dsa_chip_data *cd = ds->pd;
 748         struct device_node *phy_dn, *port_dn;
 749         bool phy_is_fixed = false;
 750         u32 phy_flags = 0;
 751         int mode, ret;
 752
 753         port_dn = cd->port_dn[p->port];
 754         mode = of_get_phy_mode(port_dn);
 755         if (mode < 0)
 756                 mode = PHY_INTERFACE_MODE_NA;
 757         p->phy_interface = mode;
 758
 759         phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
 760         if (of_phy_is_fixed_link(port_dn)) {
 761                 /* In the case of a fixed PHY, the DT node associated
 762                  * to the fixed PHY is the Port DT node
 763                  */
 764                 ret = of_phy_register_fixed_link(port_dn);
 765                 if (ret) {
 766                         netdev_err(slave_dev, "failed to register fixed PHY\n");
 767                         return ret;
 768                 }
 769                 phy_is_fixed = true;
 770                 phy_dn = port_dn;
 771         }
 772
 773         if (ds->drv->get_phy_flags)
 774                 phy_flags = ds->drv->get_phy_flags(ds, p->port);
 775
 776         if (phy_dn) {
 777                 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
 778                 /* If this PHY address is part of phys_mii_mask, which means
 779                  * that we need to divert reads and writes to/from it, then we
 780                  * want to bind this device using the slave MII bus created by
 781                  * DSA to make that happen.
 782                  */
 783                 if (!phy_is_fixed && ret >= 0 &&
 784                     (ds->phys_mii_mask & (1 << ret))) {
 785                         ret = dsa_slave_phy_connect(p, slave_dev, ret);
 786                         if (ret)
 787                                 return ret;
 788                 } else {
 789                         p->phy = of_phy_connect(slave_dev, phy_dn,
 790                                                 dsa_slave_adjust_link,
 791                                                 phy_flags,
 792                                                 p->phy_interface);
 793                 }
 794         }
 795
 796         if (p->phy && phy_is_fixed)
 797                 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
 798
 799         /* We could not connect to a designated PHY, so use the switch internal
 800          * MDIO bus instead
 801          */
 802         if (!p->phy) {
 803                 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
 804                 if (ret)
 805                         return ret;
 806         } else {
 807                 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
 808                             p->phy->addr, p->phy->drv->name);
 809         }
 810
 811         return 0;
 812 }
 813
 814 int dsa_slave_suspend(struct net_device *slave_dev)
 815 {
 816         struct dsa_slave_priv *p = netdev_priv(slave_dev);
 817
 818         netif_device_detach(slave_dev);
 819
 820         if (p->phy) {
 821                 phy_stop(p->phy);
 822                 p->old_pause = -1;
 823                 p->old_link = -1;
 824                 p->old_duplex = -1;
 825                 phy_suspend(p->phy);
 826         }
 827
 828         return 0;
 829 }
 830
 831 int dsa_slave_resume(struct net_device *slave_dev)
 832 {
 833         struct dsa_slave_priv *p = netdev_priv(slave_dev);
 834
 835         netif_device_attach(slave_dev);
 836
 837         if (p->phy) {
 838                 phy_resume(p->phy);
 839                 phy_start(p->phy);
 840         }
 841
 842         return 0;
 843 }
 844
 845 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
 846                      int port, char *name)
 847 {
 848         struct net_device *master = ds->dst->master_netdev;
 849         struct net_device *slave_dev;
 850         struct dsa_slave_priv *p;
 851         int ret;
 852
 853         slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
 854                                  NET_NAME_UNKNOWN, ether_setup);
 855         if (slave_dev == NULL)
 856                 return -ENOMEM;
 857
 858         slave_dev->features = master->vlan_features;
 859         slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
 860         eth_hw_addr_inherit(slave_dev, master);
 861         slave_dev->tx_queue_len = 0;
 862         slave_dev->netdev_ops = &dsa_slave_netdev_ops;
 863         slave_dev->swdev_ops = &dsa_slave_swdev_ops;
 864
 865         SET_NETDEV_DEV(slave_dev, parent);
 866         slave_dev->dev.of_node = ds->pd->port_dn[port];
 867         slave_dev->vlan_features = master->vlan_features;
 868
 869         p = netdev_priv(slave_dev);
 870         p->dev = slave_dev;
 871         p->parent = ds;
 872         p->port = port;
 873
 874         switch (ds->dst->tag_protocol) {
 875 #ifdef CONFIG_NET_DSA_TAG_DSA
 876         case DSA_TAG_PROTO_DSA:
 877                 p->xmit = dsa_netdev_ops.xmit;
 878                 break;
 879 #endif
 880 #ifdef CONFIG_NET_DSA_TAG_EDSA
 881         case DSA_TAG_PROTO_EDSA:
 882                 p->xmit = edsa_netdev_ops.xmit;
 883                 break;
 884 #endif
 885 #ifdef CONFIG_NET_DSA_TAG_TRAILER
 886         case DSA_TAG_PROTO_TRAILER:
 887                 p->xmit = trailer_netdev_ops.xmit;
 888                 break;
 889 #endif
 890 #ifdef CONFIG_NET_DSA_TAG_BRCM
 891         case DSA_TAG_PROTO_BRCM:
 892                 p->xmit = brcm_netdev_ops.xmit;
 893                 break;
 894 #endif
 895         default:
 896                 p->xmit = dsa_slave_notag_xmit;
 897                 break;
 898         }
 899
 900         p->old_pause = -1;
 901         p->old_link = -1;
 902         p->old_duplex = -1;
 903
 904         ret = dsa_slave_phy_setup(p, slave_dev);
 905         if (ret) {
 906                 free_netdev(slave_dev);
 907                 return ret;
 908         }
 909
 910         ds->ports[port] = slave_dev;
 911         ret = register_netdev(slave_dev);
 912         if (ret) {
 913                 netdev_err(master, "error %d registering interface %s\n",
 914                            ret, slave_dev->name);
 915                 phy_disconnect(p->phy);
 916                 ds->ports[port] = NULL;
 917                 free_netdev(slave_dev);
 918                 return ret;
 919         }
 920
 921         netif_carrier_off(slave_dev);
 922
 923         return 0;
 924 }
 925
 926 static bool dsa_slave_dev_check(struct net_device *dev)
 927 {
 928         return dev->netdev_ops == &dsa_slave_netdev_ops;
 929 }
 930
 931 static int dsa_slave_master_changed(struct net_device *dev)
 932 {
 933         struct net_device *master = netdev_master_upper_dev_get(dev);
 934         struct dsa_slave_priv *p = netdev_priv(dev);
 935         int err = 0;
 936
 937         if (master && master->rtnl_link_ops &&
 938             !strcmp(master->rtnl_link_ops->kind, "bridge"))
 939                 err = dsa_slave_bridge_port_join(dev, master);
 940         else if (dsa_port_is_bridged(p))
 941                 err = dsa_slave_bridge_port_leave(dev);
 942
 943         return err;
 944 }
 945
 946 int dsa_slave_netdevice_event(struct notifier_block *unused,
 947                               unsigned long event, void *ptr)
 948 {
 949         struct net_device *dev;
 950         int err = 0;
 951
 952         switch (event) {
 953         case NETDEV_CHANGEUPPER:
 954                 dev = netdev_notifier_info_to_dev(ptr);
 955                 if (!dsa_slave_dev_check(dev))
 956                         goto out;
 957
 958                 err = dsa_slave_master_changed(dev);
 959                 if (err)
 960                         netdev_warn(dev, "failed to reflect master change\n");
 961
 962                 break;
 963         }
 964
 965 out:
 966         return NOTIFY_DONE;
 967 }