net/dsa/slave.c

   1 /*
   2  * net/dsa/slave.c - Slave device handling
   3  * Copyright (c) 2008-2009 Marvell Semiconductor
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/list.h>
  12 #include <linux/etherdevice.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/phy.h>
  15 #include <linux/phy_fixed.h>
  16 #include <linux/of_net.h>
  17 #include <linux/of_mdio.h>
  18 #include <linux/mdio.h>
  19 #include <net/rtnetlink.h>
  20 #include <net/switchdev.h>
  21 #include <linux/if_bridge.h>
  22 #include <linux/netpoll.h>
  23 #include "dsa_priv.h"
  24
  25 /* slave mii_bus handling ***************************************************/
  26 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
  27 {
  28         struct dsa_switch *ds = bus->priv;
  29
  30         if (ds->phys_mii_mask & (1 << addr))
  31                 return ds->drv->phy_read(ds, addr, reg);
  32
  33         return 0xffff;
  34 }
  35
  36 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
  37 {
  38         struct dsa_switch *ds = bus->priv;
  39
  40         if (ds->phys_mii_mask & (1 << addr))
  41                 return ds->drv->phy_write(ds, addr, reg, val);
  42
  43         return 0;
  44 }
  45
  46 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
  47 {
  48         ds->slave_mii_bus->priv = (void *)ds;
  49         ds->slave_mii_bus->name = "dsa slave smi";
  50         ds->slave_mii_bus->read = dsa_slave_phy_read;
  51         ds->slave_mii_bus->write = dsa_slave_phy_write;
  52         snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
  53                         ds->index, ds->pd->sw_addr);
  54         ds->slave_mii_bus->parent = ds->master_dev;
  55         ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
  56 }
  57
  58
  59 /* slave device handling ****************************************************/
  60 static int dsa_slave_get_iflink(const struct net_device *dev)
  61 {
  62         struct dsa_slave_priv *p = netdev_priv(dev);
  63
  64         return p->parent->dst->master_netdev->ifindex;
  65 }
  66
  67 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p)
  68 {
  69         return !!p->bridge_dev;
  70 }
  71
  72 static int dsa_slave_open(struct net_device *dev)
  73 {
  74         struct dsa_slave_priv *p = netdev_priv(dev);
  75         struct net_device *master = p->parent->dst->master_netdev;
  76         struct dsa_switch *ds = p->parent;
  77         u8 stp_state = dsa_port_is_bridged(p) ?
  78                         BR_STATE_BLOCKING : BR_STATE_FORWARDING;
  79         int err;
  80
  81         if (!(master->flags & IFF_UP))
  82                 return -ENETDOWN;
  83
  84         if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
  85                 err = dev_uc_add(master, dev->dev_addr);
  86                 if (err < 0)
  87                         goto out;
  88         }
  89
  90         if (dev->flags & IFF_ALLMULTI) {
  91                 err = dev_set_allmulti(master, 1);
  92                 if (err < 0)
  93                         goto del_unicast;
  94         }
  95         if (dev->flags & IFF_PROMISC) {
  96                 err = dev_set_promiscuity(master, 1);
  97                 if (err < 0)
  98                         goto clear_allmulti;
  99         }
 100
 101         if (ds->drv->port_enable) {
 102                 err = ds->drv->port_enable(ds, p->port, p->phy);
 103                 if (err)
 104                         goto clear_promisc;
 105         }
 106
 107         if (ds->drv->port_stp_state_set)
 108                 ds->drv->port_stp_state_set(ds, p->port, stp_state);
 109
 110         if (p->phy)
 111                 phy_start(p->phy);
 112
 113         return 0;
 114
 115 clear_promisc:
 116         if (dev->flags & IFF_PROMISC)
 117                 dev_set_promiscuity(master, -1);
 118 clear_allmulti:
 119         if (dev->flags & IFF_ALLMULTI)
 120                 dev_set_allmulti(master, -1);
 121 del_unicast:
 122         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 123                 dev_uc_del(master, dev->dev_addr);
 124 out:
 125         return err;
 126 }
 127
 128 static int dsa_slave_close(struct net_device *dev)
 129 {
 130         struct dsa_slave_priv *p = netdev_priv(dev);
 131         struct net_device *master = p->parent->dst->master_netdev;
 132         struct dsa_switch *ds = p->parent;
 133
 134         if (p->phy)
 135                 phy_stop(p->phy);
 136
 137         dev_mc_unsync(master, dev);
 138         dev_uc_unsync(master, dev);
 139         if (dev->flags & IFF_ALLMULTI)
 140                 dev_set_allmulti(master, -1);
 141         if (dev->flags & IFF_PROMISC)
 142                 dev_set_promiscuity(master, -1);
 143
 144         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 145                 dev_uc_del(master, dev->dev_addr);
 146
 147         if (ds->drv->port_disable)
 148                 ds->drv->port_disable(ds, p->port, p->phy);
 149
 150         if (ds->drv->port_stp_state_set)
 151                 ds->drv->port_stp_state_set(ds, p->port, BR_STATE_DISABLED);
 152
 153         return 0;
 154 }
 155
 156 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
 157 {
 158         struct dsa_slave_priv *p = netdev_priv(dev);
 159         struct net_device *master = p->parent->dst->master_netdev;
 160
 161         if (change & IFF_ALLMULTI)
 162                 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
 163         if (change & IFF_PROMISC)
 164                 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
 165 }
 166
 167 static void dsa_slave_set_rx_mode(struct net_device *dev)
 168 {
 169         struct dsa_slave_priv *p = netdev_priv(dev);
 170         struct net_device *master = p->parent->dst->master_netdev;
 171
 172         dev_mc_sync(master, dev);
 173         dev_uc_sync(master, dev);
 174 }
 175
 176 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
 177 {
 178         struct dsa_slave_priv *p = netdev_priv(dev);
 179         struct net_device *master = p->parent->dst->master_netdev;
 180         struct sockaddr *addr = a;
 181         int err;
 182
 183         if (!is_valid_ether_addr(addr->sa_data))
 184                 return -EADDRNOTAVAIL;
 185
 186         if (!(dev->flags & IFF_UP))
 187                 goto out;
 188
 189         if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
 190                 err = dev_uc_add(master, addr->sa_data);
 191                 if (err < 0)
 192                         return err;
 193         }
 194
 195         if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 196                 dev_uc_del(master, dev->dev_addr);
 197
 198 out:
 199         ether_addr_copy(dev->dev_addr, addr->sa_data);
 200
 201         return 0;
 202 }
 203
 204 static int dsa_slave_port_vlan_add(struct net_device *dev,
 205                                    const struct switchdev_obj_port_vlan *vlan,
 206                                    struct switchdev_trans *trans)
 207 {
 208         struct dsa_slave_priv *p = netdev_priv(dev);
 209         struct dsa_switch *ds = p->parent;
 210
 211         if (switchdev_trans_ph_prepare(trans)) {
 212                 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add)
 213                         return -EOPNOTSUPP;
 214
 215                 return ds->drv->port_vlan_prepare(ds, p->port, vlan, trans);
 216         }
 217
 218         ds->drv->port_vlan_add(ds, p->port, vlan, trans);
 219
 220         return 0;
 221 }
 222
 223 static int dsa_slave_port_vlan_del(struct net_device *dev,
 224                                    const struct switchdev_obj_port_vlan *vlan)
 225 {
 226         struct dsa_slave_priv *p = netdev_priv(dev);
 227         struct dsa_switch *ds = p->parent;
 228
 229         if (!ds->drv->port_vlan_del)
 230                 return -EOPNOTSUPP;
 231
 232         return ds->drv->port_vlan_del(ds, p->port, vlan);
 233 }
 234
 235 static int dsa_slave_port_vlan_dump(struct net_device *dev,
 236                                     struct switchdev_obj_port_vlan *vlan,
 237                                     switchdev_obj_dump_cb_t *cb)
 238 {
 239         struct dsa_slave_priv *p = netdev_priv(dev);
 240         struct dsa_switch *ds = p->parent;
 241
 242         if (ds->drv->port_vlan_dump)
 243                 return ds->drv->port_vlan_dump(ds, p->port, vlan, cb);
 244
 245         return -EOPNOTSUPP;
 246 }
 247
 248 static int dsa_slave_port_fdb_add(struct net_device *dev,
 249                                   const struct switchdev_obj_port_fdb *fdb,
 250                                   struct switchdev_trans *trans)
 251 {
 252         struct dsa_slave_priv *p = netdev_priv(dev);
 253         struct dsa_switch *ds = p->parent;
 254
 255         if (switchdev_trans_ph_prepare(trans)) {
 256                 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add)
 257                         return -EOPNOTSUPP;
 258
 259                 return ds->drv->port_fdb_prepare(ds, p->port, fdb, trans);
 260         }
 261
 262         ds->drv->port_fdb_add(ds, p->port, fdb, trans);
 263
 264         return 0;
 265 }
 266
 267 static int dsa_slave_port_fdb_del(struct net_device *dev,
 268                                   const struct switchdev_obj_port_fdb *fdb)
 269 {
 270         struct dsa_slave_priv *p = netdev_priv(dev);
 271         struct dsa_switch *ds = p->parent;
 272         int ret = -EOPNOTSUPP;
 273
 274         if (ds->drv->port_fdb_del)
 275                 ret = ds->drv->port_fdb_del(ds, p->port, fdb);
 276
 277         return ret;
 278 }
 279
 280 static int dsa_slave_port_fdb_dump(struct net_device *dev,
 281                                    struct switchdev_obj_port_fdb *fdb,
 282                                    switchdev_obj_dump_cb_t *cb)
 283 {
 284         struct dsa_slave_priv *p = netdev_priv(dev);
 285         struct dsa_switch *ds = p->parent;
 286
 287         if (ds->drv->port_fdb_dump)
 288                 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb);
 289
 290         return -EOPNOTSUPP;
 291 }
 292
 293 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 294 {
 295         struct dsa_slave_priv *p = netdev_priv(dev);
 296
 297         if (p->phy != NULL)
 298                 return phy_mii_ioctl(p->phy, ifr, cmd);
 299
 300         return -EOPNOTSUPP;
 301 }
 302
 303 static int dsa_slave_stp_state_set(struct net_device *dev,
 304                                    const struct switchdev_attr *attr,
 305                                    struct switchdev_trans *trans)
 306 {
 307         struct dsa_slave_priv *p = netdev_priv(dev);
 308         struct dsa_switch *ds = p->parent;
 309
 310         if (switchdev_trans_ph_prepare(trans))
 311                 return ds->drv->port_stp_state_set ? 0 : -EOPNOTSUPP;
 312
 313         ds->drv->port_stp_state_set(ds, p->port, attr->u.stp_state);
 314
 315         return 0;
 316 }
 317
 318 static int dsa_slave_vlan_filtering(struct net_device *dev,
 319                                     const struct switchdev_attr *attr,
 320                                     struct switchdev_trans *trans)
 321 {
 322         struct dsa_slave_priv *p = netdev_priv(dev);
 323         struct dsa_switch *ds = p->parent;
 324
 325         /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
 326         if (switchdev_trans_ph_prepare(trans))
 327                 return 0;
 328
 329         if (ds->drv->port_vlan_filtering)
 330                 return ds->drv->port_vlan_filtering(ds, p->port,
 331                                                     attr->u.vlan_filtering);
 332
 333         return 0;
 334 }
 335
 336 static int dsa_slave_port_attr_set(struct net_device *dev,
 337                                    const struct switchdev_attr *attr,
 338                                    struct switchdev_trans *trans)
 339 {
 340         int ret;
 341
 342         switch (attr->id) {
 343         case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
 344                 ret = dsa_slave_stp_state_set(dev, attr, trans);
 345                 break;
 346         case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
 347                 ret = dsa_slave_vlan_filtering(dev, attr, trans);
 348                 break;
 349         default:
 350                 ret = -EOPNOTSUPP;
 351                 break;
 352         }
 353
 354         return ret;
 355 }
 356
 357 static int dsa_slave_port_obj_add(struct net_device *dev,
 358                                   const struct switchdev_obj *obj,
 359                                   struct switchdev_trans *trans)
 360 {
 361         int err;
 362
 363         /* For the prepare phase, ensure the full set of changes is feasable in
 364          * one go in order to signal a failure properly. If an operation is not
 365          * supported, return -EOPNOTSUPP.
 366          */
 367
 368         switch (obj->id) {
 369         case SWITCHDEV_OBJ_ID_PORT_FDB:
 370                 err = dsa_slave_port_fdb_add(dev,
 371                                              SWITCHDEV_OBJ_PORT_FDB(obj),
 372                                              trans);
 373                 break;
 374         case SWITCHDEV_OBJ_ID_PORT_VLAN:
 375                 err = dsa_slave_port_vlan_add(dev,
 376                                               SWITCHDEV_OBJ_PORT_VLAN(obj),
 377                                               trans);
 378                 break;
 379         default:
 380                 err = -EOPNOTSUPP;
 381                 break;
 382         }
 383
 384         return err;
 385 }
 386
 387 static int dsa_slave_port_obj_del(struct net_device *dev,
 388                                   const struct switchdev_obj *obj)
 389 {
 390         int err;
 391
 392         switch (obj->id) {
 393         case SWITCHDEV_OBJ_ID_PORT_FDB:
 394                 err = dsa_slave_port_fdb_del(dev,
 395                                              SWITCHDEV_OBJ_PORT_FDB(obj));
 396                 break;
 397         case SWITCHDEV_OBJ_ID_PORT_VLAN:
 398                 err = dsa_slave_port_vlan_del(dev,
 399                                               SWITCHDEV_OBJ_PORT_VLAN(obj));
 400                 break;
 401         default:
 402                 err = -EOPNOTSUPP;
 403                 break;
 404         }
 405
 406         return err;
 407 }
 408
 409 static int dsa_slave_port_obj_dump(struct net_device *dev,
 410                                    struct switchdev_obj *obj,
 411                                    switchdev_obj_dump_cb_t *cb)
 412 {
 413         int err;
 414
 415         switch (obj->id) {
 416         case SWITCHDEV_OBJ_ID_PORT_FDB:
 417                 err = dsa_slave_port_fdb_dump(dev,
 418                                               SWITCHDEV_OBJ_PORT_FDB(obj),
 419                                               cb);
 420                 break;
 421         case SWITCHDEV_OBJ_ID_PORT_VLAN:
 422                 err = dsa_slave_port_vlan_dump(dev,
 423                                                SWITCHDEV_OBJ_PORT_VLAN(obj),
 424                                                cb);
 425                 break;
 426         default:
 427                 err = -EOPNOTSUPP;
 428                 break;
 429         }
 430
 431         return err;
 432 }
 433
 434 static int dsa_slave_bridge_port_join(struct net_device *dev,
 435                                       struct net_device *br)
 436 {
 437         struct dsa_slave_priv *p = netdev_priv(dev);
 438         struct dsa_switch *ds = p->parent;
 439         int ret = -EOPNOTSUPP;
 440
 441         p->bridge_dev = br;
 442
 443         if (ds->drv->port_bridge_join)
 444                 ret = ds->drv->port_bridge_join(ds, p->port, br);
 445
 446         return ret == -EOPNOTSUPP ? 0 : ret;
 447 }
 448
 449 static void dsa_slave_bridge_port_leave(struct net_device *dev)
 450 {
 451         struct dsa_slave_priv *p = netdev_priv(dev);
 452         struct dsa_switch *ds = p->parent;
 453
 454
 455         if (ds->drv->port_bridge_leave)
 456                 ds->drv->port_bridge_leave(ds, p->port);
 457
 458         p->bridge_dev = NULL;
 459
 460         /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
 461          * so allow it to be in BR_STATE_FORWARDING to be kept functional
 462          */
 463         if (ds->drv->port_stp_state_set)
 464                 ds->drv->port_stp_state_set(ds, p->port, BR_STATE_FORWARDING);
 465 }
 466
 467 static int dsa_slave_port_attr_get(struct net_device *dev,
 468                                    struct switchdev_attr *attr)
 469 {
 470         struct dsa_slave_priv *p = netdev_priv(dev);
 471         struct dsa_switch *ds = p->parent;
 472
 473         switch (attr->id) {
 474         case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
 475                 attr->u.ppid.id_len = sizeof(ds->index);
 476                 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
 477                 break;
 478         default:
 479                 return -EOPNOTSUPP;
 480         }
 481
 482         return 0;
 483 }
 484
 485 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
 486                                                struct sk_buff *skb)
 487 {
 488 #ifdef CONFIG_NET_POLL_CONTROLLER
 489         if (p->netpoll)
 490                 netpoll_send_skb(p->netpoll, skb);
 491 #else
 492         BUG();
 493 #endif
 494         return NETDEV_TX_OK;
 495 }
 496
 497 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
 498 {
 499         struct dsa_slave_priv *p = netdev_priv(dev);
 500         struct sk_buff *nskb;
 501
 502         dev->stats.tx_packets++;
 503         dev->stats.tx_bytes += skb->len;
 504
 505         /* Transmit function may have to reallocate the original SKB */
 506         nskb = p->xmit(skb, dev);
 507         if (!nskb)
 508                 return NETDEV_TX_OK;
 509
 510         /* SKB for netpoll still need to be mangled with the protocol-specific
 511          * tag to be successfully transmitted
 512          */
 513         if (unlikely(netpoll_tx_running(dev)))
 514                 return dsa_netpoll_send_skb(p, nskb);
 515
 516         /* Queue the SKB for transmission on the parent interface, but
 517          * do not modify its EtherType
 518          */
 519         nskb->dev = p->parent->dst->master_netdev;
 520         dev_queue_xmit(nskb);
 521
 522         return NETDEV_TX_OK;
 523 }
 524
 525 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
 526                                             struct net_device *dev)
 527 {
 528         /* Just return the original SKB */
 529         return skb;
 530 }
 531
 532
 533 /* ethtool operations *******************************************************/
 534 static int
 535 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 536 {
 537         struct dsa_slave_priv *p = netdev_priv(dev);
 538         int err;
 539
 540         err = -EOPNOTSUPP;
 541         if (p->phy != NULL) {
 542                 err = phy_read_status(p->phy);
 543                 if (err == 0)
 544                         err = phy_ethtool_gset(p->phy, cmd);
 545         }
 546
 547         return err;
 548 }
 549
 550 static int
 551 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 552 {
 553         struct dsa_slave_priv *p = netdev_priv(dev);
 554
 555         if (p->phy != NULL)
 556                 return phy_ethtool_sset(p->phy, cmd);
 557
 558         return -EOPNOTSUPP;
 559 }
 560
 561 static void dsa_slave_get_drvinfo(struct net_device *dev,
 562                                   struct ethtool_drvinfo *drvinfo)
 563 {
 564         strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
 565         strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
 566         strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
 567         strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
 568 }
 569
 570 static int dsa_slave_get_regs_len(struct net_device *dev)
 571 {
 572         struct dsa_slave_priv *p = netdev_priv(dev);
 573         struct dsa_switch *ds = p->parent;
 574
 575         if (ds->drv->get_regs_len)
 576                 return ds->drv->get_regs_len(ds, p->port);
 577
 578         return -EOPNOTSUPP;
 579 }
 580
 581 static void
 582 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
 583 {
 584         struct dsa_slave_priv *p = netdev_priv(dev);
 585         struct dsa_switch *ds = p->parent;
 586
 587         if (ds->drv->get_regs)
 588                 ds->drv->get_regs(ds, p->port, regs, _p);
 589 }
 590
 591 static int dsa_slave_nway_reset(struct net_device *dev)
 592 {
 593         struct dsa_slave_priv *p = netdev_priv(dev);
 594
 595         if (p->phy != NULL)
 596                 return genphy_restart_aneg(p->phy);
 597
 598         return -EOPNOTSUPP;
 599 }
 600
 601 static u32 dsa_slave_get_link(struct net_device *dev)
 602 {
 603         struct dsa_slave_priv *p = netdev_priv(dev);
 604
 605         if (p->phy != NULL) {
 606                 genphy_update_link(p->phy);
 607                 return p->phy->link;
 608         }
 609
 610         return -EOPNOTSUPP;
 611 }
 612
 613 static int dsa_slave_get_eeprom_len(struct net_device *dev)
 614 {
 615         struct dsa_slave_priv *p = netdev_priv(dev);
 616         struct dsa_switch *ds = p->parent;
 617
 618         if (ds->pd->eeprom_len)
 619                 return ds->pd->eeprom_len;
 620
 621         if (ds->drv->get_eeprom_len)
 622                 return ds->drv->get_eeprom_len(ds);
 623
 624         return 0;
 625 }
 626
 627 static int dsa_slave_get_eeprom(struct net_device *dev,
 628                                 struct ethtool_eeprom *eeprom, u8 *data)
 629 {
 630         struct dsa_slave_priv *p = netdev_priv(dev);
 631         struct dsa_switch *ds = p->parent;
 632
 633         if (ds->drv->get_eeprom)
 634                 return ds->drv->get_eeprom(ds, eeprom, data);
 635
 636         return -EOPNOTSUPP;
 637 }
 638
 639 static int dsa_slave_set_eeprom(struct net_device *dev,
 640                                 struct ethtool_eeprom *eeprom, u8 *data)
 641 {
 642         struct dsa_slave_priv *p = netdev_priv(dev);
 643         struct dsa_switch *ds = p->parent;
 644
 645         if (ds->drv->set_eeprom)
 646                 return ds->drv->set_eeprom(ds, eeprom, data);
 647
 648         return -EOPNOTSUPP;
 649 }
 650
 651 static void dsa_slave_get_strings(struct net_device *dev,
 652                                   uint32_t stringset, uint8_t *data)
 653 {
 654         struct dsa_slave_priv *p = netdev_priv(dev);
 655         struct dsa_switch *ds = p->parent;
 656
 657         if (stringset == ETH_SS_STATS) {
 658                 int len = ETH_GSTRING_LEN;
 659
 660                 strncpy(data, "tx_packets", len);
 661                 strncpy(data + len, "tx_bytes", len);
 662                 strncpy(data + 2 * len, "rx_packets", len);
 663                 strncpy(data + 3 * len, "rx_bytes", len);
 664                 if (ds->drv->get_strings != NULL)
 665                         ds->drv->get_strings(ds, p->port, data + 4 * len);
 666         }
 667 }
 668
 669 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
 670                                         struct ethtool_stats *stats,
 671                                         uint64_t *data)
 672 {
 673         struct dsa_slave_priv *p = netdev_priv(dev);
 674         struct dsa_switch *ds = p->parent;
 675
 676         data[0] = dev->stats.tx_packets;
 677         data[1] = dev->stats.tx_bytes;
 678         data[2] = dev->stats.rx_packets;
 679         data[3] = dev->stats.rx_bytes;
 680         if (ds->drv->get_ethtool_stats != NULL)
 681                 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
 682 }
 683
 684 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
 685 {
 686         struct dsa_slave_priv *p = netdev_priv(dev);
 687         struct dsa_switch *ds = p->parent;
 688
 689         if (sset == ETH_SS_STATS) {
 690                 int count;
 691
 692                 count = 4;
 693                 if (ds->drv->get_sset_count != NULL)
 694                         count += ds->drv->get_sset_count(ds);
 695
 696                 return count;
 697         }
 698
 699         return -EOPNOTSUPP;
 700 }
 701
 702 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 703 {
 704         struct dsa_slave_priv *p = netdev_priv(dev);
 705         struct dsa_switch *ds = p->parent;
 706
 707         if (ds->drv->get_wol)
 708                 ds->drv->get_wol(ds, p->port, w);
 709 }
 710
 711 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
 712 {
 713         struct dsa_slave_priv *p = netdev_priv(dev);
 714         struct dsa_switch *ds = p->parent;
 715         int ret = -EOPNOTSUPP;
 716
 717         if (ds->drv->set_wol)
 718                 ret = ds->drv->set_wol(ds, p->port, w);
 719
 720         return ret;
 721 }
 722
 723 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
 724 {
 725         struct dsa_slave_priv *p = netdev_priv(dev);
 726         struct dsa_switch *ds = p->parent;
 727         int ret;
 728
 729         if (!ds->drv->set_eee)
 730                 return -EOPNOTSUPP;
 731
 732         ret = ds->drv->set_eee(ds, p->port, p->phy, e);
 733         if (ret)
 734                 return ret;
 735
 736         if (p->phy)
 737                 ret = phy_ethtool_set_eee(p->phy, e);
 738
 739         return ret;
 740 }
 741
 742 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 743 {
 744         struct dsa_slave_priv *p = netdev_priv(dev);
 745         struct dsa_switch *ds = p->parent;
 746         int ret;
 747
 748         if (!ds->drv->get_eee)
 749                 return -EOPNOTSUPP;
 750
 751         ret = ds->drv->get_eee(ds, p->port, e);
 752         if (ret)
 753                 return ret;
 754
 755         if (p->phy)
 756                 ret = phy_ethtool_get_eee(p->phy, e);
 757
 758         return ret;
 759 }
 760
 761 #ifdef CONFIG_NET_POLL_CONTROLLER
 762 static int dsa_slave_netpoll_setup(struct net_device *dev,
 763                                    struct netpoll_info *ni)
 764 {
 765         struct dsa_slave_priv *p = netdev_priv(dev);
 766         struct dsa_switch *ds = p->parent;
 767         struct net_device *master = ds->dst->master_netdev;
 768         struct netpoll *netpoll;
 769         int err = 0;
 770
 771         netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
 772         if (!netpoll)
 773                 return -ENOMEM;
 774
 775         err = __netpoll_setup(netpoll, master);
 776         if (err) {
 777                 kfree(netpoll);
 778                 goto out;
 779         }
 780
 781         p->netpoll = netpoll;
 782 out:
 783         return err;
 784 }
 785
 786 static void dsa_slave_netpoll_cleanup(struct net_device *dev)
 787 {
 788         struct dsa_slave_priv *p = netdev_priv(dev);
 789         struct netpoll *netpoll = p->netpoll;
 790
 791         if (!netpoll)
 792                 return;
 793
 794         p->netpoll = NULL;
 795
 796         __netpoll_free_async(netpoll);
 797 }
 798
 799 static void dsa_slave_poll_controller(struct net_device *dev)
 800 {
 801 }
 802 #endif
 803
 804 static const struct ethtool_ops dsa_slave_ethtool_ops = {
 805         .get_settings           = dsa_slave_get_settings,
 806         .set_settings           = dsa_slave_set_settings,
 807         .get_drvinfo            = dsa_slave_get_drvinfo,
 808         .get_regs_len           = dsa_slave_get_regs_len,
 809         .get_regs               = dsa_slave_get_regs,
 810         .nway_reset             = dsa_slave_nway_reset,
 811         .get_link               = dsa_slave_get_link,
 812         .get_eeprom_len         = dsa_slave_get_eeprom_len,
 813         .get_eeprom             = dsa_slave_get_eeprom,
 814         .set_eeprom             = dsa_slave_set_eeprom,
 815         .get_strings            = dsa_slave_get_strings,
 816         .get_ethtool_stats      = dsa_slave_get_ethtool_stats,
 817         .get_sset_count         = dsa_slave_get_sset_count,
 818         .set_wol                = dsa_slave_set_wol,
 819         .get_wol                = dsa_slave_get_wol,
 820         .set_eee                = dsa_slave_set_eee,
 821         .get_eee                = dsa_slave_get_eee,
 822 };
 823
 824 static const struct net_device_ops dsa_slave_netdev_ops = {
 825         .ndo_open               = dsa_slave_open,
 826         .ndo_stop               = dsa_slave_close,
 827         .ndo_start_xmit         = dsa_slave_xmit,
 828         .ndo_change_rx_flags    = dsa_slave_change_rx_flags,
 829         .ndo_set_rx_mode        = dsa_slave_set_rx_mode,
 830         .ndo_set_mac_address    = dsa_slave_set_mac_address,
 831         .ndo_fdb_add            = switchdev_port_fdb_add,
 832         .ndo_fdb_del            = switchdev_port_fdb_del,
 833         .ndo_fdb_dump           = switchdev_port_fdb_dump,
 834         .ndo_do_ioctl           = dsa_slave_ioctl,
 835         .ndo_get_iflink         = dsa_slave_get_iflink,
 836 #ifdef CONFIG_NET_POLL_CONTROLLER
 837         .ndo_netpoll_setup      = dsa_slave_netpoll_setup,
 838         .ndo_netpoll_cleanup    = dsa_slave_netpoll_cleanup,
 839         .ndo_poll_controller    = dsa_slave_poll_controller,
 840 #endif
 841         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
 842         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
 843         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
 844 };
 845
 846 static const struct switchdev_ops dsa_slave_switchdev_ops = {
 847         .switchdev_port_attr_get        = dsa_slave_port_attr_get,
 848         .switchdev_port_attr_set        = dsa_slave_port_attr_set,
 849         .switchdev_port_obj_add         = dsa_slave_port_obj_add,
 850         .switchdev_port_obj_del         = dsa_slave_port_obj_del,
 851         .switchdev_port_obj_dump        = dsa_slave_port_obj_dump,
 852 };
 853
 854 static struct device_type dsa_type = {
 855         .name   = "dsa",
 856 };
 857
 858 static void dsa_slave_adjust_link(struct net_device *dev)
 859 {
 860         struct dsa_slave_priv *p = netdev_priv(dev);
 861         struct dsa_switch *ds = p->parent;
 862         unsigned int status_changed = 0;
 863
 864         if (p->old_link != p->phy->link) {
 865                 status_changed = 1;
 866                 p->old_link = p->phy->link;
 867         }
 868
 869         if (p->old_duplex != p->phy->duplex) {
 870                 status_changed = 1;
 871                 p->old_duplex = p->phy->duplex;
 872         }
 873
 874         if (p->old_pause != p->phy->pause) {
 875                 status_changed = 1;
 876                 p->old_pause = p->phy->pause;
 877         }
 878
 879         if (ds->drv->adjust_link && status_changed)
 880                 ds->drv->adjust_link(ds, p->port, p->phy);
 881
 882         if (status_changed)
 883                 phy_print_status(p->phy);
 884 }
 885
 886 static int dsa_slave_fixed_link_update(struct net_device *dev,
 887                                        struct fixed_phy_status *status)
 888 {
 889         struct dsa_slave_priv *p;
 890         struct dsa_switch *ds;
 891
 892         if (dev) {
 893                 p = netdev_priv(dev);
 894                 ds = p->parent;
 895                 if (ds->drv->fixed_link_update)
 896                         ds->drv->fixed_link_update(ds, p->port, status);
 897         }
 898
 899         return 0;
 900 }
 901
 902 /* slave device setup *******************************************************/
 903 static int dsa_slave_phy_connect(struct dsa_slave_priv *p,
 904                                  struct net_device *slave_dev,
 905                                  int addr)
 906 {
 907         struct dsa_switch *ds = p->parent;
 908
 909         p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr);
 910         if (!p->phy) {
 911                 netdev_err(slave_dev, "no phy at %d\n", addr);
 912                 return -ENODEV;
 913         }
 914
 915         /* Use already configured phy mode */
 916         if (p->phy_interface == PHY_INTERFACE_MODE_NA)
 917                 p->phy_interface = p->phy->interface;
 918         phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
 919                            p->phy_interface);
 920
 921         return 0;
 922 }
 923
 924 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 925                                 struct net_device *slave_dev)
 926 {
 927         struct dsa_switch *ds = p->parent;
 928         struct dsa_chip_data *cd = ds->pd;
 929         struct device_node *phy_dn, *port_dn;
 930         bool phy_is_fixed = false;
 931         u32 phy_flags = 0;
 932         int mode, ret;
 933
 934         port_dn = cd->port_dn[p->port];
 935         mode = of_get_phy_mode(port_dn);
 936         if (mode < 0)
 937                 mode = PHY_INTERFACE_MODE_NA;
 938         p->phy_interface = mode;
 939
 940         phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
 941         if (of_phy_is_fixed_link(port_dn)) {
 942                 /* In the case of a fixed PHY, the DT node associated
 943                  * to the fixed PHY is the Port DT node
 944                  */
 945                 ret = of_phy_register_fixed_link(port_dn);
 946                 if (ret) {
 947                         netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret);
 948                         return ret;
 949                 }
 950                 phy_is_fixed = true;
 951                 phy_dn = port_dn;
 952         }
 953
 954         if (ds->drv->get_phy_flags)
 955                 phy_flags = ds->drv->get_phy_flags(ds, p->port);
 956
 957         if (phy_dn) {
 958                 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn);
 959
 960                 /* If this PHY address is part of phys_mii_mask, which means
 961                  * that we need to divert reads and writes to/from it, then we
 962                  * want to bind this device using the slave MII bus created by
 963                  * DSA to make that happen.
 964                  */
 965                 if (!phy_is_fixed && phy_id >= 0 &&
 966                     (ds->phys_mii_mask & (1 << phy_id))) {
 967                         ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
 968                         if (ret) {
 969                                 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
 970                                 return ret;
 971                         }
 972                 } else {
 973                         p->phy = of_phy_connect(slave_dev, phy_dn,
 974                                                 dsa_slave_adjust_link,
 975                                                 phy_flags,
 976                                                 p->phy_interface);
 977                 }
 978         }
 979
 980         if (p->phy && phy_is_fixed)
 981                 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
 982
 983         /* We could not connect to a designated PHY, so use the switch internal
 984          * MDIO bus instead
 985          */
 986         if (!p->phy) {
 987                 ret = dsa_slave_phy_connect(p, slave_dev, p->port);
 988                 if (ret) {
 989                         netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
 990                         return ret;
 991                 }
 992         }
 993
 994         phy_attached_info(p->phy);
 995
 996         return 0;
 997 }
 998
 999 static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
1000 static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
1001                                             struct netdev_queue *txq,
1002                                             void *_unused)
1003 {
1004         lockdep_set_class(&txq->_xmit_lock,
1005                           &dsa_slave_netdev_xmit_lock_key);
1006 }
1007
1008 int dsa_slave_suspend(struct net_device *slave_dev)
1009 {
1010         struct dsa_slave_priv *p = netdev_priv(slave_dev);
1011
1012         if (p->phy) {
1013                 phy_stop(p->phy);
1014                 p->old_pause = -1;
1015                 p->old_link = -1;
1016                 p->old_duplex = -1;
1017                 phy_suspend(p->phy);
1018         }
1019
1020         return 0;
1021 }
1022
1023 int dsa_slave_resume(struct net_device *slave_dev)
1024 {
1025         struct dsa_slave_priv *p = netdev_priv(slave_dev);
1026
1027         netif_device_attach(slave_dev);
1028
1029         if (p->phy) {
1030                 phy_resume(p->phy);
1031                 phy_start(p->phy);
1032         }
1033
1034         return 0;
1035 }
1036
1037 int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
1038                      int port, char *name)
1039 {
1040         struct net_device *master = ds->dst->master_netdev;
1041         struct net_device *slave_dev;
1042         struct dsa_slave_priv *p;
1043         int ret;
1044
1045         slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
1046                                  NET_NAME_UNKNOWN, ether_setup);
1047         if (slave_dev == NULL)
1048                 return -ENOMEM;
1049
1050         slave_dev->features = master->vlan_features;
1051         slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
1052         eth_hw_addr_inherit(slave_dev, master);
1053         slave_dev->priv_flags |= IFF_NO_QUEUE;
1054         slave_dev->netdev_ops = &dsa_slave_netdev_ops;
1055         slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;
1056         SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
1057
1058         netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
1059                                  NULL);
1060
1061         SET_NETDEV_DEV(slave_dev, parent);
1062         slave_dev->dev.of_node = ds->pd->port_dn[port];
1063         slave_dev->vlan_features = master->vlan_features;
1064
1065         p = netdev_priv(slave_dev);
1066         p->parent = ds;
1067         p->port = port;
1068
1069         switch (ds->dst->tag_protocol) {
1070 #ifdef CONFIG_NET_DSA_TAG_DSA
1071         case DSA_TAG_PROTO_DSA:
1072                 p->xmit = dsa_netdev_ops.xmit;
1073                 break;
1074 #endif
1075 #ifdef CONFIG_NET_DSA_TAG_EDSA
1076         case DSA_TAG_PROTO_EDSA:
1077                 p->xmit = edsa_netdev_ops.xmit;
1078                 break;
1079 #endif
1080 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1081         case DSA_TAG_PROTO_TRAILER:
1082                 p->xmit = trailer_netdev_ops.xmit;
1083                 break;
1084 #endif
1085 #ifdef CONFIG_NET_DSA_TAG_BRCM
1086         case DSA_TAG_PROTO_BRCM:
1087                 p->xmit = brcm_netdev_ops.xmit;
1088                 break;
1089 #endif
1090         default:
1091                 p->xmit = dsa_slave_notag_xmit;
1092                 break;
1093         }
1094
1095         p->old_pause = -1;
1096         p->old_link = -1;
1097         p->old_duplex = -1;
1098
1099         ds->ports[port] = slave_dev;
1100         ret = register_netdev(slave_dev);
1101         if (ret) {
1102                 netdev_err(master, "error %d registering interface %s\n",
1103                            ret, slave_dev->name);
1104                 ds->ports[port] = NULL;
1105                 free_netdev(slave_dev);
1106                 return ret;
1107         }
1108
1109         netif_carrier_off(slave_dev);
1110
1111         ret = dsa_slave_phy_setup(p, slave_dev);
1112         if (ret) {
1113                 netdev_err(master, "error %d setting up slave phy\n", ret);
1114                 unregister_netdev(slave_dev);
1115                 free_netdev(slave_dev);
1116                 return ret;
1117         }
1118
1119         return 0;
1120 }
1121
1122 void dsa_slave_destroy(struct net_device *slave_dev)
1123 {
1124         struct dsa_slave_priv *p = netdev_priv(slave_dev);
1125
1126         netif_carrier_off(slave_dev);
1127         if (p->phy)
1128                 phy_disconnect(p->phy);
1129         unregister_netdev(slave_dev);
1130         free_netdev(slave_dev);
1131 }
1132
1133 static bool dsa_slave_dev_check(struct net_device *dev)
1134 {
1135         return dev->netdev_ops == &dsa_slave_netdev_ops;
1136 }
1137
1138 static int dsa_slave_port_upper_event(struct net_device *dev,
1139                                       unsigned long event, void *ptr)
1140 {
1141         struct netdev_notifier_changeupper_info *info = ptr;
1142         struct net_device *upper = info->upper_dev;
1143         int err = 0;
1144
1145         switch (event) {
1146         case NETDEV_CHANGEUPPER:
1147                 if (netif_is_bridge_master(upper)) {
1148                         if (info->linking)
1149                                 err = dsa_slave_bridge_port_join(dev, upper);
1150                         else
1151                                 dsa_slave_bridge_port_leave(dev);
1152                 }
1153
1154                 break;
1155         }
1156
1157         return notifier_from_errno(err);
1158 }
1159
1160 static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
1161                                 void *ptr)
1162 {
1163         switch (event) {
1164         case NETDEV_CHANGEUPPER:
1165                 return dsa_slave_port_upper_event(dev, event, ptr);
1166         }
1167
1168         return NOTIFY_DONE;
1169 }
1170
1171 int dsa_slave_netdevice_event(struct notifier_block *unused,
1172                               unsigned long event, void *ptr)
1173 {
1174         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1175
1176         if (dsa_slave_dev_check(dev))
1177                 return dsa_slave_port_event(dev, event, ptr);
1178
1179         return NOTIFY_DONE;
1180 }