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