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_init(struct net_device *dev)
  59 {
  60         struct dsa_slave_priv *p = netdev_priv(dev);
  61
  62         dev->iflink = p->parent->dst->master_netdev->ifindex;
  63
  64         return 0;
  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, 0);
 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_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 205                              struct net_device *dev,
 206                              const unsigned char *addr, u16 vid, u16 nlm_flags)
 207 {
 208         struct dsa_slave_priv *p = netdev_priv(dev);
 209         struct dsa_switch *ds = p->parent;
 210         int ret = -EOPNOTSUPP;
 211
 212         if (ds->drv->fdb_add)
 213                 ret = ds->drv->fdb_add(ds, p->port, addr, vid);
 214
 215         return ret;
 216 }
 217
 218 static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 219                              struct net_device *dev,
 220                              const unsigned char *addr, u16 vid)
 221 {
 222         struct dsa_slave_priv *p = netdev_priv(dev);
 223         struct dsa_switch *ds = p->parent;
 224         int ret = -EOPNOTSUPP;
 225
 226         if (ds->drv->fdb_del)
 227                 ret = ds->drv->fdb_del(ds, p->port, addr, vid);
 228
 229         return ret;
 230 }
 231
 232 static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb,
 233                                const unsigned char *addr, u16 vid,
 234                                bool is_static,
 235                                u32 portid, u32 seq, int type,
 236                                unsigned int flags)
 237 {
 238         struct nlmsghdr *nlh;
 239         struct ndmsg *ndm;
 240
 241         nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
 242         if (!nlh)
 243                 return -EMSGSIZE;
 244
 245         ndm = nlmsg_data(nlh);
 246         ndm->ndm_family  = AF_BRIDGE;
 247         ndm->ndm_pad1    = 0;
 248         ndm->ndm_pad2    = 0;
 249         ndm->ndm_flags   = NTF_EXT_LEARNED;
 250         ndm->ndm_type    = 0;
 251         ndm->ndm_ifindex = dev->ifindex;
 252         ndm->ndm_state   = is_static ? NUD_NOARP : NUD_REACHABLE;
 253
 254         if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
 255                 goto nla_put_failure;
 256
 257         if (vid && nla_put_u16(skb, NDA_VLAN, vid))
 258                 goto nla_put_failure;
 259
 260         nlmsg_end(skb, nlh);
 261         return 0;
 262
 263 nla_put_failure:
 264         nlmsg_cancel(skb, nlh);
 265         return -EMSGSIZE;
 266 }
 267
 268 /* Dump information about entries, in response to GETNEIGH */
 269 static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 270                               struct net_device *dev,
 271                               struct net_device *filter_dev, int idx)
 272 {
 273         struct dsa_slave_priv *p = netdev_priv(dev);
 274         struct dsa_switch *ds = p->parent;
 275         unsigned char addr[ETH_ALEN] = { 0 };
 276         int ret;
 277
 278         if (!ds->drv->fdb_getnext)
 279                 return -EOPNOTSUPP;
 280
 281         for (; ; idx++) {
 282                 bool is_static;
 283
 284                 ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static);
 285                 if (ret < 0)
 286                         break;
 287
 288                 if (idx < cb->args[0])
 289                         continue;
 290
 291                 ret = dsa_slave_fill_info(dev, skb, addr, 0,
 292                                           is_static,
 293                                           NETLINK_CB(cb->skb).portid,
 294                                           cb->nlh->nlmsg_seq,
 295                                           RTM_NEWNEIGH, NLM_F_MULTI);
 296                 if (ret < 0)
 297                         break;
 298         }
 299
 300         return idx;
 301 }
 302
 303 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 304 {
 305         struct dsa_slave_priv *p = netdev_priv(dev);
 306
 307         if (p->phy != NULL)
 308                 return phy_mii_ioctl(p->phy, ifr, cmd);
 309
 310         return -EOPNOTSUPP;
 311 }
 312
 313 /* Return a bitmask of all ports being currently bridged within a given bridge
 314  * device. Note that on leave, the mask will still return the bitmask of ports
 315  * currently bridged, prior to port removal, and this is exactly what we want.
 316  */
 317 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds,
 318                                   struct net_device *bridge)
 319 {
 320         struct dsa_slave_priv *p;
 321         unsigned int port;
 322         u32 mask = 0;
 323
 324         for (port = 0; port < DSA_MAX_PORTS; port++) {
 325                 if (!dsa_is_port_initialized(ds, port))
 326                         continue;
 327
 328                 p = netdev_priv(ds->ports[port]);
 329
 330                 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT &&
 331                     p->bridge_dev == bridge)
 332                         mask |= 1 << port;
 333         }
 334
 335         return mask;
 336 }
 337
 338 static int dsa_slave_stp_update(struct net_device *dev, u8 state)
 339 {
 340         struct dsa_slave_priv *p = netdev_priv(dev);
 341         struct dsa_switch *ds = p->parent;
 342         int ret = -EOPNOTSUPP;
 343
 344         if (ds->drv->port_stp_update)
 345                 ret = ds->drv->port_stp_update(ds, p->port, state);
 346
 347         return ret;
 348 }
 349
 350 static int dsa_slave_bridge_port_join(struct net_device *dev,
 351                                       struct net_device *br)
 352 {
 353         struct dsa_slave_priv *p = netdev_priv(dev);
 354         struct dsa_switch *ds = p->parent;
 355         int ret = -EOPNOTSUPP;
 356
 357         p->bridge_dev = br;
 358
 359         if (ds->drv->port_join_bridge)
 360                 ret = ds->drv->port_join_bridge(ds, p->port,
 361                                                 dsa_slave_br_port_mask(ds, br));
 362
 363         return ret;
 364 }
 365
 366 static int dsa_slave_bridge_port_leave(struct net_device *dev)
 367 {
 368         struct dsa_slave_priv *p = netdev_priv(dev);
 369         struct dsa_switch *ds = p->parent;
 370         int ret = -EOPNOTSUPP;
 371
 372
 373         if (ds->drv->port_leave_bridge)
 374                 ret = ds->drv->port_leave_bridge(ds, p->port,
 375                                                  dsa_slave_br_port_mask(ds, p->bridge_dev));
 376
 377         p->bridge_dev = NULL;
 378
 379         /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
 380          * so allow it to be in BR_STATE_FORWARDING to be kept functional
 381          */
 382         dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
 383
 384         return ret;
 385 }
 386
 387 static int dsa_slave_parent_id_get(struct net_device *dev,
 388                                    struct netdev_phys_item_id *psid)
 389 {
 390         struct dsa_slave_priv *p = netdev_priv(dev);
 391         struct dsa_switch *ds = p->parent;
 392
 393         psid->id_len = sizeof(ds->index);
 394         memcpy(&psid->id, &ds->index, psid->id_len);
 395
 396         return 0;
 397 }
 398
 399 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
 400 {
 401         struct dsa_slave_priv *p = netdev_priv(dev);
 402
 403         return p->xmit(skb, dev);
 404 }
 405
 406 static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
 407                                         struct net_device *dev)
 408 {
 409         struct dsa_slave_priv *p = netdev_priv(dev);
 410
 411         skb->dev = p->parent->dst->master_netdev;
 412         dev_queue_xmit(skb);
 413
 414         return NETDEV_TX_OK;
 415 }
 416
 417
 418 /* ethtool operations *******************************************************/
 419 static int
 420 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 421 {
 422         struct dsa_slave_priv *p = netdev_priv(dev);
 423         int err;
 424
 425         err = -EOPNOTSUPP;
 426         if (p->phy != NULL) {
 427                 err = phy_read_status(p->phy);
 428                 if (err == 0)
 429                         err = phy_ethtool_gset(p->phy, cmd);
 430         }
 431
 432         return err;
 433 }
 434
 435 static int
 436 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 437 {
 438         struct dsa_slave_priv *p = netdev_priv(dev);
 439
 440         if (p->phy != NULL)
 441                 return phy_ethtool_sset(p->phy, cmd);
 442
 443         return -EOPNOTSUPP;
 444 }
 445
 446 static void dsa_slave_get_drvinfo(struct net_device *dev,
 447                                   struct ethtool_drvinfo *drvinfo)
 448 {
 449         strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
 450         strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
 451         strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
 452         strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
 453 }
 454
 455 static int dsa_slave_get_regs_len(struct net_device *dev)
 456 {
 457         struct dsa_slave_priv *p = netdev_priv(dev);
 458         struct dsa_switch *ds = p->parent;
 459
 460         if (ds->drv->get_regs_len)
 461                 return ds->drv->get_regs_len(ds, p->port);
 462
 463         return -EOPNOTSUPP;
 464 }
 465
 466 static void
 467 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
 468 {
 469         struct dsa_slave_priv *p = netdev_priv(dev);
 470         struct dsa_switch *ds = p->parent;
 471
 472         if (ds->drv->get_regs)
 473                 ds->drv->get_regs(ds, p->port, regs, _p);
 474 }
 475
 476 static int dsa_slave_nway_reset(struct net_device *dev)
 477 {
 478         struct dsa_slave_priv *p = netdev_priv(dev);
 479
 480         if (p->phy != NULL)
 481                 return genphy_restart_aneg(p->phy);
 482
 483         return -EOPNOTSUPP;
 484 }
 485
 486 static u32 dsa_slave_get_link(struct net_device *dev)
 487 {
 488         struct dsa_slave_priv *p = netdev_priv(dev);
 489
 490         if (p->phy != NULL) {
 491                 genphy_update_link(p->phy);
 492                 return p->phy->link;
 493         }
 494
 495         return -EOPNOTSUPP;
 496 }
 497
 498 static int dsa_slave_get_eeprom_len(struct net_device *dev)
 499 {
 500         struct dsa_slave_priv *p = netdev_priv(dev);
 501         struct dsa_switch *ds = p->parent;
 502
 503         if (ds->pd->eeprom_len)
 504                 return ds->pd->eeprom_len;
 505
 506         if (ds->drv->get_eeprom_len)
 507                 return ds->drv->get_eeprom_len(ds);
 508
 509         return 0;
 510 }
 511
 512 static int dsa_slave_get_eeprom(struct net_device *dev,
 513                                 struct ethtool_eeprom *eeprom, u8 *data)
 514 {
 515         struct dsa_slave_priv *p = netdev_priv(dev);
 516         struct dsa_switch *ds = p->parent;
 517
 518         if (ds->drv->get_eeprom)
 519                 return ds->drv->get_eeprom(ds, eeprom, data);
 520
 521         return -EOPNOTSUPP;
 522 }
 523
 524 static int dsa_slave_set_eeprom(struct net_device *dev,
 525                                 struct ethtool_eeprom *eeprom, u8 *data)
 526 {
 527         struct dsa_slave_priv *p = netdev_priv(dev);
 528         struct dsa_switch *ds = p->parent;
 529
 530         if (ds->drv->set_eeprom)
 531                 return ds->drv->set_eeprom(ds, eeprom, data);
 532
 533         return -EOPNOTSUPP;
 534 }
 535
 536 static void dsa_slave_get_strings(struct net_device *dev,
 537                                   uint32_t stringset, uint8_t *data)
 538 {
 539         struct dsa_slave_priv *p = netdev_priv(dev);
 540         struct dsa_switch *ds = p->parent;
 541
 542         if (stringset == ETH_SS_STATS) {
 543                 int len = ETH_GSTRING_LEN;
 544
 545                 strncpy(data, "tx_packets", len);
 546                 strncpy(data + len, "tx_bytes", len);
 547                 strncpy(data + 2 * len, "rx_packets", len);
 548                 strncpy(data + 3 * len, "rx_bytes", len);
 549                 if (ds->drv->get_strings != NULL)
 550                         ds->drv->get_strings(ds, p->port, data + 4 * len);
 551         }
 552 }
 553
 554 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 555                                         struct ethtool_stats *stats,
 556                                         uint64_t *data)
 557 {
 558         struct dsa_slave_priv *p = netdev_priv(dev);
 559         struct dsa_switch *ds = p->parent;
 560
 561         data[0] = p->dev->stats.tx_packets;
 562         data[1] = p->dev->stats.tx_bytes;
 563         data[2] = p->dev->stats.rx_packets;
 564         data[3] = p->dev->stats.rx_bytes;
 565         if (ds->drv->get_ethtool_stats != NULL)
 566                 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
 567 }
 568
 569 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 570 {
 571         struct dsa_slave_priv *p = netdev_priv(dev);
 572         struct dsa_switch *ds = p->parent;
 573
 574         if (sset == ETH_SS_STATS) {
 575                 int count;
 576
 577                 count = 4;
 578                 if (ds->drv->get_sset_count != NULL)
 579                         count += ds->drv->get_sset_count(ds);
 580
 581                 return count;
 582         }
 583
 584         return -EOPNOTSUPP;
 585 }
 586
 587 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 588 {
 589         struct dsa_slave_priv *p = netdev_priv(dev);
 590         struct dsa_switch *ds = p->parent;
 591
 592         if (ds->drv->get_wol)
 593                 ds->drv->get_wol(ds, p->port, w);
 594 }
 595
 596 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 597 {
 598         struct dsa_slave_priv *p = netdev_priv(dev);
 599         struct dsa_switch *ds = p->parent;
 600         int ret = -EOPNOTSUPP;
 601
 602         if (ds->drv->set_wol)
 603                 ret = ds->drv->set_wol(ds, p->port, w);
 604
 605         return ret;
 606 }
 607
 608 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 609 {
 610         struct dsa_slave_priv *p = netdev_priv(dev);
 611         struct dsa_switch *ds = p->parent;
 612         int ret;
 613
 614         if (!ds->drv->set_eee)
 615                 return -EOPNOTSUPP;
 616
 617         ret = ds->drv->set_eee(ds, p->port, p->phy, e);
 618         if (ret)
 619                 return ret;
 620
 621         if (p->phy)
 622                 ret = phy_ethtool_set_eee(p->phy, e);
 623
 624         return ret;
 625 }
 626
 627 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 628 {
 629         struct dsa_slave_priv *p = netdev_priv(dev);
 630         struct dsa_switch *ds = p->parent;
 631         int ret;
 632
 633         if (!ds->drv->get_eee)
 634                 return -EOPNOTSUPP;
 635
 636         ret = ds->drv->get_eee(ds, p->port, e);
 637         if (ret)
 638                 return ret;
 639
 640         if (p->phy)
 641                 ret = phy_ethtool_get_eee(p->phy, e);
 642
 643         return ret;
 644 }
 645
 646 static const struct ethtool_ops dsa_slave_ethtool_ops = {
 647         .get_settings           = dsa_slave_get_settings,
 648         .set_settings           = dsa_slave_set_settings,
 649         .get_drvinfo            = dsa_slave_get_drvinfo,
 650         .get_regs_len           = dsa_slave_get_regs_len,
 651         .get_regs               = dsa_slave_get_regs,
 652         .nway_reset             = dsa_slave_nway_reset,
 653         .get_link               = dsa_slave_get_link,
 654         .get_eeprom_len         = dsa_slave_get_eeprom_len,
 655         .get_eeprom             = dsa_slave_get_eeprom,
 656         .set_eeprom             = dsa_slave_set_eeprom,
 657         .get_strings            = dsa_slave_get_strings,
 658         .get_ethtool_stats      = dsa_slave_get_ethtool_stats,
 659         .get_sset_count         = dsa_slave_get_sset_count,
 660         .set_wol                = dsa_slave_set_wol,
 661         .get_wol                = dsa_slave_get_wol,
 662         .set_eee                = dsa_slave_set_eee,
 663         .get_eee                = dsa_slave_get_eee,
 664 };
 665
 666 static const struct net_device_ops dsa_slave_netdev_ops = {
 667         .ndo_init               = dsa_slave_init,
 668         .ndo_open               = dsa_slave_open,
 669         .ndo_stop               = dsa_slave_close,
 670         .ndo_start_xmit         = dsa_slave_xmit,
 671         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
 672         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
 673         .ndo_set_mac_address    = dsa_slave_set_mac_address,
 674         .ndo_fdb_add            = dsa_slave_fdb_add,
 675         .ndo_fdb_del            = dsa_slave_fdb_del,
 676         .ndo_fdb_dump           = dsa_slave_fdb_dump,
 677         .ndo_do_ioctl           = dsa_slave_ioctl,
 678 };
 679
 680 static const struct swdev_ops dsa_slave_swdev_ops = {
 681         .swdev_parent_id_get = dsa_slave_parent_id_get,
 682         .swdev_port_stp_update = dsa_slave_stp_update,
 683 };
 684
 685 static void dsa_slave_adjust_link(struct net_device *dev)
 686 {
 687         struct dsa_slave_priv *p = netdev_priv(dev);
 688         struct dsa_switch *ds = p->parent;
 689         unsigned int status_changed = 0;
 690
 691         if (p->old_link != p->phy->link) {
 692                 status_changed = 1;
 693                 p->old_link = p->phy->link;
 694         }
 695
 696         if (p->old_duplex != p->phy->duplex) {
 697                 status_changed = 1;
 698                 p->old_duplex = p->phy->duplex;
 699         }
 700
 701         if (p->old_pause != p->phy->pause) {
 702                 status_changed = 1;
 703                 p->old_pause = p->phy->pause;
 704         }
 705
 706         if (ds->drv->adjust_link && status_changed)
 707                 ds->drv->adjust_link(ds, p->port, p->phy);
 708
 709         if (status_changed)
 710                 phy_print_status(p->phy);
 711 }
 712
 713 static int dsa_slave_fixed_link_update(struct net_device *dev,
 714                                        struct fixed_phy_status *status)
 715 {
 716         struct dsa_slave_priv *p = netdev_priv(dev);
 717         struct dsa_switch *ds = p->parent;
 718
 719         if (ds->drv->fixed_link_update)
 720                 ds->drv->fixed_link_update(ds, p->port, status);
 721
 722         return 0;
 723 }
 724
 725 /* slave device setup *******************************************************/
 726 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
 727                                  struct net_device *slave_dev,
 728                                  int addr)
 729 {
 730         struct dsa_switch *ds = p->parent;
 731
 732         p->phy = ds->slave_mii_bus->phy_map[addr];
 733         if (!p->phy)
 734                 return -ENODEV;
 735
 736         /* Use already configured phy mode */
 737         p->phy_interface = p->phy->interface;
 738         phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
 739                            p->phy_interface);
 740
 741         return 0;
 742 }
 743
 744 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 745                                 struct net_device *slave_dev)
 746 {
 747         struct dsa_switch *ds = p->parent;
 748         struct dsa_chip_data *cd = ds->pd;
 749         struct device_node *phy_dn, *port_dn;
 750         bool phy_is_fixed = false;
 751         u32 phy_flags = 0;
 752         int mode, ret;
 753
 754         port_dn = cd->port_dn[p->port];
 755         mode = of_get_phy_mode(port_dn);
 756         if (mode < 0)
 757                 mode = PHY_INTERFACE_MODE_NA;
 758         p->phy_interface = mode;
 759
 760         phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
 761         if (of_phy_is_fixed_link(port_dn)) {
 762                 /* In the case of a fixed PHY, the DT node associated
 763                  * to the fixed PHY is the Port DT node
 764                  */
 765                 ret = of_phy_register_fixed_link(port_dn);
 766                 if (ret) {
 767                         netdev_err(slave_dev, "failed to register fixed PHY\n");
 768                         return ret;
 769                 }
 770                 phy_is_fixed = true;
 771                 phy_dn = port_dn;
 772         }
 773
 774         if (ds->drv->get_phy_flags)
 775                 phy_flags = ds->drv->get_phy_flags(ds, p->port);
 776
 777         if (phy_dn) {
 778                 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
 779                 /* If this PHY address is part of phys_mii_mask, which means
 780                  * that we need to divert reads and writes to/from it, then we
 781                  * want to bind this device using the slave MII bus created by
 782                  * DSA to make that happen.
 783                  */
 784                 if (!phy_is_fixed && ret >= 0 &&
 785                     (ds->phys_mii_mask & (1 << ret))) {
 786                         ret = dsa_slave_phy_connect(p, slave_dev, ret);
 787                         if (ret)
 788                                 return ret;
 789                 } else {
 790                         p->phy = of_phy_connect(slave_dev, phy_dn,
 791                                                 dsa_slave_adjust_link,
 792                                                 phy_flags,
 793                                                 p->phy_interface);
 794                 }
 795         }
 796
 797         if (p->phy && phy_is_fixed)
 798                 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
 799
 800         /* We could not connect to a designated PHY, so use the switch internal
 801          * MDIO bus instead
 802          */
 803         if (!p->phy) {
 804                 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
 805                 if (ret)
 806                         return ret;
 807         } else {
 808                 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
 809                             p->phy->addr, p->phy->drv->name);
 810         }
 811
 812         return 0;
 813 }
 814
 815 int dsa_slave_suspend(struct net_device *slave_dev)
 816 {
 817         struct dsa_slave_priv *p = netdev_priv(slave_dev);
 818
 819         netif_device_detach(slave_dev);
 820
 821         if (p->phy) {
 822                 phy_stop(p->phy);
 823                 p->old_pause = -1;
 824                 p->old_link = -1;
 825                 p->old_duplex = -1;
 826                 phy_suspend(p->phy);
 827         }
 828
 829         return 0;
 830 }
 831
 832 int dsa_slave_resume(struct net_device *slave_dev)
 833 {
 834         struct dsa_slave_priv *p = netdev_priv(slave_dev);
 835
 836         netif_device_attach(slave_dev);
 837
 838         if (p->phy) {
 839                 phy_resume(p->phy);
 840                 phy_start(p->phy);
 841         }
 842
 843         return 0;
 844 }
 845
 846 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
 847                      int port, char *name)
 848 {
 849         struct net_device *master = ds->dst->master_netdev;
 850         struct net_device *slave_dev;
 851         struct dsa_slave_priv *p;
 852         int ret;
 853
 854         slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
 855                                  NET_NAME_UNKNOWN, ether_setup);
 856         if (slave_dev == NULL)
 857                 return -ENOMEM;
 858
 859         slave_dev->features = master->vlan_features;
 860         slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
 861         eth_hw_addr_inherit(slave_dev, master);
 862         slave_dev->tx_queue_len = 0;
 863         slave_dev->netdev_ops = &dsa_slave_netdev_ops;
 864         slave_dev->swdev_ops = &dsa_slave_swdev_ops;
 865
 866         SET_NETDEV_DEV(slave_dev, parent);
 867         slave_dev->dev.of_node = ds->pd->port_dn[port];
 868         slave_dev->vlan_features = master->vlan_features;
 869
 870         p = netdev_priv(slave_dev);
 871         p->dev = slave_dev;
 872         p->parent = ds;
 873         p->port = port;
 874
 875         switch (ds->dst->tag_protocol) {
 876 #ifdef CONFIG_NET_DSA_TAG_DSA
 877         case DSA_TAG_PROTO_DSA:
 878                 p->xmit = dsa_netdev_ops.xmit;
 879                 break;
 880 #endif
 881 #ifdef CONFIG_NET_DSA_TAG_EDSA
 882         case DSA_TAG_PROTO_EDSA:
 883                 p->xmit = edsa_netdev_ops.xmit;
 884                 break;
 885 #endif
 886 #ifdef CONFIG_NET_DSA_TAG_TRAILER
 887         case DSA_TAG_PROTO_TRAILER:
 888                 p->xmit = trailer_netdev_ops.xmit;
 889                 break;
 890 #endif
 891 #ifdef CONFIG_NET_DSA_TAG_BRCM
 892         case DSA_TAG_PROTO_BRCM:
 893                 p->xmit = brcm_netdev_ops.xmit;
 894                 break;
 895 #endif
 896         default:
 897                 p->xmit = dsa_slave_notag_xmit;
 898                 break;
 899         }
 900
 901         p->old_pause = -1;
 902         p->old_link = -1;
 903         p->old_duplex = -1;
 904
 905         ret = dsa_slave_phy_setup(p, slave_dev);
 906         if (ret) {
 907                 free_netdev(slave_dev);
 908                 return ret;
 909         }
 910
 911         ds->ports[port] = slave_dev;
 912         ret = register_netdev(slave_dev);
 913         if (ret) {
 914                 netdev_err(master, "error %d registering interface %s\n",
 915                            ret, slave_dev->name);
 916                 phy_disconnect(p->phy);
 917                 ds->ports[port] = NULL;
 918                 free_netdev(slave_dev);
 919                 return ret;
 920         }
 921
 922         netif_carrier_off(slave_dev);
 923
 924         return 0;
 925 }
 926
 927 static bool dsa_slave_dev_check(struct net_device *dev)
 928 {
 929         return dev->netdev_ops == &dsa_slave_netdev_ops;
 930 }
 931
 932 static int dsa_slave_master_changed(struct net_device *dev)
 933 {
 934         struct net_device *master = netdev_master_upper_dev_get(dev);
 935         struct dsa_slave_priv *p = netdev_priv(dev);
 936         int err = 0;
 937
 938         if (master && master->rtnl_link_ops &&
 939             !strcmp(master->rtnl_link_ops->kind, "bridge"))
 940                 err = dsa_slave_bridge_port_join(dev, master);
 941         else if (dsa_port_is_bridged(p))
 942                 err = dsa_slave_bridge_port_leave(dev);
 943
 944         return err;
 945 }
 946
 947 int dsa_slave_netdevice_event(struct notifier_block *unused,
 948                               unsigned long event, void *ptr)
 949 {
 950         struct net_device *dev;
 951         int err = 0;
 952
 953         switch (event) {
 954         case NETDEV_CHANGEUPPER:
 955                 dev = netdev_notifier_info_to_dev(ptr);
 956                 if (!dsa_slave_dev_check(dev))
 957                         goto out;
 958
 959                 err = dsa_slave_master_changed(dev);
 960                 if (err)
 961                         netdev_warn(dev, "failed to reflect master change\n");
 962
 963                 break;
 964         }
 965
 966 out:
 967         return NOTIFY_DONE;
 968 }