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, -1);
 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_port_attr_set(struct net_device *dev,
 349                                    struct switchdev_attr *attr)
 350 {
 351         int ret = 0;
 352
 353         switch (attr->id) {
 354         case SWITCHDEV_ATTR_PORT_STP_STATE:
 355                 if (attr->trans == SWITCHDEV_TRANS_COMMIT)
 356                         ret = dsa_slave_stp_update(dev, attr->u.stp_state);
 357                 break;
 358         default:
 359                 ret = -EOPNOTSUPP;
 360                 break;
 361         }
 362
 363         return ret;
 364 }
 365
 366 static int dsa_slave_bridge_port_join(struct net_device *dev,
 367                                       struct net_device *br)
 368 {
 369         struct dsa_slave_priv *p = netdev_priv(dev);
 370         struct dsa_switch *ds = p->parent;
 371         int ret = -EOPNOTSUPP;
 372
 373         p->bridge_dev = br;
 374
 375         if (ds->drv->port_join_bridge)
 376                 ret = ds->drv->port_join_bridge(ds, p->port,
 377                                                 dsa_slave_br_port_mask(ds, br));
 378
 379         return ret;
 380 }
 381
 382 static int dsa_slave_bridge_port_leave(struct net_device *dev)
 383 {
 384         struct dsa_slave_priv *p = netdev_priv(dev);
 385         struct dsa_switch *ds = p->parent;
 386         int ret = -EOPNOTSUPP;
 387
 388
 389         if (ds->drv->port_leave_bridge)
 390                 ret = ds->drv->port_leave_bridge(ds, p->port,
 391                                                  dsa_slave_br_port_mask(ds, p->bridge_dev));
 392
 393         p->bridge_dev = NULL;
 394
 395         /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
 396          * so allow it to be in BR_STATE_FORWARDING to be kept functional
 397          */
 398         dsa_slave_stp_update(dev, BR_STATE_FORWARDING);
 399
 400         return ret;
 401 }
 402
 403 static int dsa_slave_port_attr_get(struct net_device *dev,
 404                                    struct switchdev_attr *attr)
 405 {
 406         struct dsa_slave_priv *p = netdev_priv(dev);
 407         struct dsa_switch *ds = p->parent;
 408
 409         switch (attr->id) {
 410         case SWITCHDEV_ATTR_PORT_PARENT_ID:
 411                 attr->u.ppid.id_len = sizeof(ds->index);
 412                 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
 413                 break;
 414         default:
 415                 return -EOPNOTSUPP;
 416         }
 417
 418         return 0;
 419 }
 420
 421 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
 422 {
 423         struct dsa_slave_priv *p = netdev_priv(dev);
 424         struct sk_buff *nskb;
 425
 426         dev->stats.tx_packets++;
 427         dev->stats.tx_bytes += skb->len;
 428
 429         /* Transmit function may have to reallocate the original SKB */
 430         nskb = p->xmit(skb, dev);
 431         if (!nskb)
 432                 return NETDEV_TX_OK;
 433
 434         /* Queue the SKB for transmission on the parent interface, but
 435          * do not modify its EtherType
 436          */
 437         nskb->dev = p->parent->dst->master_netdev;
 438         dev_queue_xmit(nskb);
 439
 440         return NETDEV_TX_OK;
 441 }
 442
 443 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
 444                                             struct net_device *dev)
 445 {
 446         /* Just return the original SKB */
 447         return skb;
 448 }
 449
 450
 451 /* ethtool operations *******************************************************/
 452 static int
 453 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 454 {
 455         struct dsa_slave_priv *p = netdev_priv(dev);
 456         int err;
 457
 458         err = -EOPNOTSUPP;
 459         if (p->phy != NULL) {
 460                 err = phy_read_status(p->phy);
 461                 if (err == 0)
 462                         err = phy_ethtool_gset(p->phy, cmd);
 463         }
 464
 465         return err;
 466 }
 467
 468 static int
 469 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 470 {
 471         struct dsa_slave_priv *p = netdev_priv(dev);
 472
 473         if (p->phy != NULL)
 474                 return phy_ethtool_sset(p->phy, cmd);
 475
 476         return -EOPNOTSUPP;
 477 }
 478
 479 static void dsa_slave_get_drvinfo(struct net_device *dev,
 480                                   struct ethtool_drvinfo *drvinfo)
 481 {
 482         strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
 483         strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
 484         strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
 485         strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
 486 }
 487
 488 static int dsa_slave_get_regs_len(struct net_device *dev)
 489 {
 490         struct dsa_slave_priv *p = netdev_priv(dev);
 491         struct dsa_switch *ds = p->parent;
 492
 493         if (ds->drv->get_regs_len)
 494                 return ds->drv->get_regs_len(ds, p->port);
 495
 496         return -EOPNOTSUPP;
 497 }
 498
 499 static void
 500 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
 501 {
 502         struct dsa_slave_priv *p = netdev_priv(dev);
 503         struct dsa_switch *ds = p->parent;
 504
 505         if (ds->drv->get_regs)
 506                 ds->drv->get_regs(ds, p->port, regs, _p);
 507 }
 508
 509 static int dsa_slave_nway_reset(struct net_device *dev)
 510 {
 511         struct dsa_slave_priv *p = netdev_priv(dev);
 512
 513         if (p->phy != NULL)
 514                 return genphy_restart_aneg(p->phy);
 515
 516         return -EOPNOTSUPP;
 517 }
 518
 519 static u32 dsa_slave_get_link(struct net_device *dev)
 520 {
 521         struct dsa_slave_priv *p = netdev_priv(dev);
 522
 523         if (p->phy != NULL) {
 524                 genphy_update_link(p->phy);
 525                 return p->phy->link;
 526         }
 527
 528         return -EOPNOTSUPP;
 529 }
 530
 531 static int dsa_slave_get_eeprom_len(struct net_device *dev)
 532 {
 533         struct dsa_slave_priv *p = netdev_priv(dev);
 534         struct dsa_switch *ds = p->parent;
 535
 536         if (ds->pd->eeprom_len)
 537                 return ds->pd->eeprom_len;
 538
 539         if (ds->drv->get_eeprom_len)
 540                 return ds->drv->get_eeprom_len(ds);
 541
 542         return 0;
 543 }
 544
 545 static int dsa_slave_get_eeprom(struct net_device *dev,
 546                                 struct ethtool_eeprom *eeprom, u8 *data)
 547 {
 548         struct dsa_slave_priv *p = netdev_priv(dev);
 549         struct dsa_switch *ds = p->parent;
 550
 551         if (ds->drv->get_eeprom)
 552                 return ds->drv->get_eeprom(ds, eeprom, data);
 553
 554         return -EOPNOTSUPP;
 555 }
 556
 557 static int dsa_slave_set_eeprom(struct net_device *dev,
 558                                 struct ethtool_eeprom *eeprom, u8 *data)
 559 {
 560         struct dsa_slave_priv *p = netdev_priv(dev);
 561         struct dsa_switch *ds = p->parent;
 562
 563         if (ds->drv->set_eeprom)
 564                 return ds->drv->set_eeprom(ds, eeprom, data);
 565
 566         return -EOPNOTSUPP;
 567 }
 568
 569 static void dsa_slave_get_strings(struct net_device *dev,
 570                                   uint32_t stringset, uint8_t *data)
 571 {
 572         struct dsa_slave_priv *p = netdev_priv(dev);
 573         struct dsa_switch *ds = p->parent;
 574
 575         if (stringset == ETH_SS_STATS) {
 576                 int len = ETH_GSTRING_LEN;
 577
 578                 strncpy(data, "tx_packets", len);
 579                 strncpy(data + len, "tx_bytes", len);
 580                 strncpy(data + 2 * len, "rx_packets", len);
 581                 strncpy(data + 3 * len, "rx_bytes", len);
 582                 if (ds->drv->get_strings != NULL)
 583                         ds->drv->get_strings(ds, p->port, data + 4 * len);
 584         }
 585 }
 586
 587 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 588                                         struct ethtool_stats *stats,
 589                                         uint64_t *data)
 590 {
 591         struct dsa_slave_priv *p = netdev_priv(dev);
 592         struct dsa_switch *ds = p->parent;
 593
 594         data[0] = p->dev->stats.tx_packets;
 595         data[1] = p->dev->stats.tx_bytes;
 596         data[2] = p->dev->stats.rx_packets;
 597         data[3] = p->dev->stats.rx_bytes;
 598         if (ds->drv->get_ethtool_stats != NULL)
 599                 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
 600 }
 601
 602 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 603 {
 604         struct dsa_slave_priv *p = netdev_priv(dev);
 605         struct dsa_switch *ds = p->parent;
 606
 607         if (sset == ETH_SS_STATS) {
 608                 int count;
 609
 610                 count = 4;
 611                 if (ds->drv->get_sset_count != NULL)
 612                         count += ds->drv->get_sset_count(ds);
 613
 614                 return count;
 615         }
 616
 617         return -EOPNOTSUPP;
 618 }
 619
 620 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 621 {
 622         struct dsa_slave_priv *p = netdev_priv(dev);
 623         struct dsa_switch *ds = p->parent;
 624
 625         if (ds->drv->get_wol)
 626                 ds->drv->get_wol(ds, p->port, w);
 627 }
 628
 629 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 630 {
 631         struct dsa_slave_priv *p = netdev_priv(dev);
 632         struct dsa_switch *ds = p->parent;
 633         int ret = -EOPNOTSUPP;
 634
 635         if (ds->drv->set_wol)
 636                 ret = ds->drv->set_wol(ds, p->port, w);
 637
 638         return ret;
 639 }
 640
 641 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 642 {
 643         struct dsa_slave_priv *p = netdev_priv(dev);
 644         struct dsa_switch *ds = p->parent;
 645         int ret;
 646
 647         if (!ds->drv->set_eee)
 648                 return -EOPNOTSUPP;
 649
 650         ret = ds->drv->set_eee(ds, p->port, p->phy, e);
 651         if (ret)
 652                 return ret;
 653
 654         if (p->phy)
 655                 ret = phy_ethtool_set_eee(p->phy, e);
 656
 657         return ret;
 658 }
 659
 660 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 661 {
 662         struct dsa_slave_priv *p = netdev_priv(dev);
 663         struct dsa_switch *ds = p->parent;
 664         int ret;
 665
 666         if (!ds->drv->get_eee)
 667                 return -EOPNOTSUPP;
 668
 669         ret = ds->drv->get_eee(ds, p->port, e);
 670         if (ret)
 671                 return ret;
 672
 673         if (p->phy)
 674                 ret = phy_ethtool_get_eee(p->phy, e);
 675
 676         return ret;
 677 }
 678
 679 static const struct ethtool_ops dsa_slave_ethtool_ops = {
 680         .get_settings           = dsa_slave_get_settings,
 681         .set_settings           = dsa_slave_set_settings,
 682         .get_drvinfo            = dsa_slave_get_drvinfo,
 683         .get_regs_len           = dsa_slave_get_regs_len,
 684         .get_regs               = dsa_slave_get_regs,
 685         .nway_reset             = dsa_slave_nway_reset,
 686         .get_link               = dsa_slave_get_link,
 687         .get_eeprom_len         = dsa_slave_get_eeprom_len,
 688         .get_eeprom             = dsa_slave_get_eeprom,
 689         .set_eeprom             = dsa_slave_set_eeprom,
 690         .get_strings            = dsa_slave_get_strings,
 691         .get_ethtool_stats      = dsa_slave_get_ethtool_stats,
 692         .get_sset_count         = dsa_slave_get_sset_count,
 693         .set_wol                = dsa_slave_set_wol,
 694         .get_wol                = dsa_slave_get_wol,
 695         .set_eee                = dsa_slave_set_eee,
 696         .get_eee                = dsa_slave_get_eee,
 697 };
 698
 699 static const struct net_device_ops dsa_slave_netdev_ops = {
 700         .ndo_open               = dsa_slave_open,
 701         .ndo_stop               = dsa_slave_close,
 702         .ndo_start_xmit         = dsa_slave_xmit,
 703         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
 704         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
 705         .ndo_set_mac_address    = dsa_slave_set_mac_address,
 706         .ndo_fdb_add            = dsa_slave_fdb_add,
 707         .ndo_fdb_del            = dsa_slave_fdb_del,
 708         .ndo_fdb_dump           = dsa_slave_fdb_dump,
 709         .ndo_do_ioctl           = dsa_slave_ioctl,
 710         .ndo_get_iflink         = dsa_slave_get_iflink,
 711 };
 712
 713 static const struct switchdev_ops dsa_slave_switchdev_ops = {
 714         .switchdev_port_attr_get        = dsa_slave_port_attr_get,
 715         .switchdev_port_attr_set        = dsa_slave_port_attr_set,
 716 };
 717
 718 static void dsa_slave_adjust_link(struct net_device *dev)
 719 {
 720         struct dsa_slave_priv *p = netdev_priv(dev);
 721         struct dsa_switch *ds = p->parent;
 722         unsigned int status_changed = 0;
 723
 724         if (p->old_link != p->phy->link) {
 725                 status_changed = 1;
 726                 p->old_link = p->phy->link;
 727         }
 728
 729         if (p->old_duplex != p->phy->duplex) {
 730                 status_changed = 1;
 731                 p->old_duplex = p->phy->duplex;
 732         }
 733
 734         if (p->old_pause != p->phy->pause) {
 735                 status_changed = 1;
 736                 p->old_pause = p->phy->pause;
 737         }
 738
 739         if (ds->drv->adjust_link && status_changed)
 740                 ds->drv->adjust_link(ds, p->port, p->phy);
 741
 742         if (status_changed)
 743                 phy_print_status(p->phy);
 744 }
 745
 746 static int dsa_slave_fixed_link_update(struct net_device *dev,
 747                                        struct fixed_phy_status *status)
 748 {
 749         struct dsa_slave_priv *p = netdev_priv(dev);
 750         struct dsa_switch *ds = p->parent;
 751
 752         if (ds->drv->fixed_link_update)
 753                 ds->drv->fixed_link_update(ds, p->port, status);
 754
 755         return 0;
 756 }
 757
 758 /* slave device setup *******************************************************/
 759 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
 760                                  struct net_device *slave_dev,
 761                                  int addr)
 762 {
 763         struct dsa_switch *ds = p->parent;
 764
 765         p->phy = ds->slave_mii_bus->phy_map[addr];
 766         if (!p->phy)
 767                 return -ENODEV;
 768
 769         /* Use already configured phy mode */
 770         p->phy_interface = p->phy->interface;
 771         phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
 772                            p->phy_interface);
 773
 774         return 0;
 775 }
 776
 777 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 778                                 struct net_device *slave_dev)
 779 {
 780         struct dsa_switch *ds = p->parent;
 781         struct dsa_chip_data *cd = ds->pd;
 782         struct device_node *phy_dn, *port_dn;
 783         bool phy_is_fixed = false;
 784         u32 phy_flags = 0;
 785         int mode, ret;
 786
 787         port_dn = cd->port_dn[p->port];
 788         mode = of_get_phy_mode(port_dn);
 789         if (mode < 0)
 790                 mode = PHY_INTERFACE_MODE_NA;
 791         p->phy_interface = mode;
 792
 793         phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
 794         if (of_phy_is_fixed_link(port_dn)) {
 795                 /* In the case of a fixed PHY, the DT node associated
 796                  * to the fixed PHY is the Port DT node
 797                  */
 798                 ret = of_phy_register_fixed_link(port_dn);
 799                 if (ret) {
 800                         netdev_err(slave_dev, "failed to register fixed PHY\n");
 801                         return ret;
 802                 }
 803                 phy_is_fixed = true;
 804                 phy_dn = port_dn;
 805         }
 806
 807         if (ds->drv->get_phy_flags)
 808                 phy_flags = ds->drv->get_phy_flags(ds, p->port);
 809
 810         if (phy_dn) {
 811                 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
 812                 /* If this PHY address is part of phys_mii_mask, which means
 813                  * that we need to divert reads and writes to/from it, then we
 814                  * want to bind this device using the slave MII bus created by
 815                  * DSA to make that happen.
 816                  */
 817                 if (!phy_is_fixed && ret >= 0 &&
 818                     (ds->phys_mii_mask & (1 << ret))) {
 819                         ret = dsa_slave_phy_connect(p, slave_dev, ret);
 820                         if (ret)
 821                                 return ret;
 822                 } else {
 823                         p->phy = of_phy_connect(slave_dev, phy_dn,
 824                                                 dsa_slave_adjust_link,
 825                                                 phy_flags,
 826                                                 p->phy_interface);
 827                 }
 828         }
 829
 830         if (p->phy && phy_is_fixed)
 831                 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
 832
 833         /* We could not connect to a designated PHY, so use the switch internal
 834          * MDIO bus instead
 835          */
 836         if (!p->phy) {
 837                 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
 838                 if (ret)
 839                         return ret;
 840         } else {
 841                 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
 842                             p->phy->addr, p->phy->drv->name);
 843         }
 844
 845         return 0;
 846 }
 847
 848 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
 849 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
 850                                             struct netdev_queue *txq,
 851                                             void *_unused)
 852 {
 853         lockdep_set_class(&txq->_xmit_lock,
 854                           &dsa_slave_netdev_xmit_lock_key);
 855 }
 856
 857 int dsa_slave_suspend(struct net_device *slave_dev)
 858 {
 859         struct dsa_slave_priv *p = netdev_priv(slave_dev);
 860
 861         if (p->phy) {
 862                 phy_stop(p->phy);
 863                 p->old_pause = -1;
 864                 p->old_link = -1;
 865                 p->old_duplex = -1;
 866                 phy_suspend(p->phy);
 867         }
 868
 869         return 0;
 870 }
 871
 872 int dsa_slave_resume(struct net_device *slave_dev)
 873 {
 874         struct dsa_slave_priv *p = netdev_priv(slave_dev);
 875
 876         netif_device_attach(slave_dev);
 877
 878         if (p->phy) {
 879                 phy_resume(p->phy);
 880                 phy_start(p->phy);
 881         }
 882
 883         return 0;
 884 }
 885
 886 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
 887                      int port, char *name)
 888 {
 889         struct net_device *master = ds->dst->master_netdev;
 890         struct net_device *slave_dev;
 891         struct dsa_slave_priv *p;
 892         int ret;
 893
 894         slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
 895                                  NET_NAME_UNKNOWN, ether_setup);
 896         if (slave_dev == NULL)
 897                 return -ENOMEM;
 898
 899         slave_dev->features = master->vlan_features;
 900         slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
 901         eth_hw_addr_inherit(slave_dev, master);
 902         slave_dev->tx_queue_len = 0;
 903         slave_dev->netdev_ops = &dsa_slave_netdev_ops;
 904         slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
 905
 906         netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
 907                                  NULL);
 908
 909         SET_NETDEV_DEV(slave_dev, parent);
 910         slave_dev->dev.of_node = ds->pd->port_dn[port];
 911         slave_dev->vlan_features = master->vlan_features;
 912
 913         p = netdev_priv(slave_dev);
 914         p->dev = slave_dev;
 915         p->parent = ds;
 916         p->port = port;
 917
 918         switch (ds->dst->tag_protocol) {
 919 #ifdef CONFIG_NET_DSA_TAG_DSA
 920         case DSA_TAG_PROTO_DSA:
 921                 p->xmit = dsa_netdev_ops.xmit;
 922                 break;
 923 #endif
 924 #ifdef CONFIG_NET_DSA_TAG_EDSA
 925         case DSA_TAG_PROTO_EDSA:
 926                 p->xmit = edsa_netdev_ops.xmit;
 927                 break;
 928 #endif
 929 #ifdef CONFIG_NET_DSA_TAG_TRAILER
 930         case DSA_TAG_PROTO_TRAILER:
 931                 p->xmit = trailer_netdev_ops.xmit;
 932                 break;
 933 #endif
 934 #ifdef CONFIG_NET_DSA_TAG_BRCM
 935         case DSA_TAG_PROTO_BRCM:
 936                 p->xmit = brcm_netdev_ops.xmit;
 937                 break;
 938 #endif
 939         default:
 940                 p->xmit = dsa_slave_notag_xmit;
 941                 break;
 942         }
 943
 944         p->old_pause = -1;
 945         p->old_link = -1;
 946         p->old_duplex = -1;
 947
 948         ret = dsa_slave_phy_setup(p, slave_dev);
 949         if (ret) {
 950                 free_netdev(slave_dev);
 951                 return ret;
 952         }
 953
 954         ds->ports[port] = slave_dev;
 955         ret = register_netdev(slave_dev);
 956         if (ret) {
 957                 netdev_err(master, "error %d registering interface %s\n",
 958                            ret, slave_dev->name);
 959                 phy_disconnect(p->phy);
 960                 ds->ports[port] = NULL;
 961                 free_netdev(slave_dev);
 962                 return ret;
 963         }
 964
 965         netif_carrier_off(slave_dev);
 966
 967         return 0;
 968 }
 969
 970 static bool dsa_slave_dev_check(struct net_device *dev)
 971 {
 972         return dev->netdev_ops == &dsa_slave_netdev_ops;
 973 }
 974
 975 static int dsa_slave_master_changed(struct net_device *dev)
 976 {
 977         struct net_device *master = netdev_master_upper_dev_get(dev);
 978         struct dsa_slave_priv *p = netdev_priv(dev);
 979         int err = 0;
 980
 981         if (master && master->rtnl_link_ops &&
 982             !strcmp(master->rtnl_link_ops->kind, "bridge"))
 983                 err = dsa_slave_bridge_port_join(dev, master);
 984         else if (dsa_port_is_bridged(p))
 985                 err = dsa_slave_bridge_port_leave(dev);
 986
 987         return err;
 988 }
 989
 990 int dsa_slave_netdevice_event(struct notifier_block *unused,
 991                               unsigned long event, void *ptr)
 992 {
 993         struct net_device *dev;
 994         int err = 0;
 995
 996         switch (event) {
 997         case NETDEV_CHANGEUPPER:
 998                 dev = netdev_notifier_info_to_dev(ptr);
 999                 if (!dsa_slave_dev_check(dev))
1000                         goto out;
1001
1002                 err = dsa_slave_master_changed(dev);
1003                 if (err)
1004                         netdev_warn(dev, "failed to reflect master change\n");
1005
1006                 break;
1007         }
1008
1009 out:
1010         return NOTIFY_DONE;
1011 }