1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/dsa/slave.c - Slave device handling 4 * Copyright (c) 2008-2009 Marvell Semiconductor 5 */ 6 7 #include <linux/list.h> 8 #include <linux/etherdevice.h> 9 #include <linux/netdevice.h> 10 #include <linux/phy.h> 11 #include <linux/phy_fixed.h> 12 #include <linux/phylink.h> 13 #include <linux/of_net.h> 14 #include <linux/of_mdio.h> 15 #include <linux/mdio.h> 16 #include <net/rtnetlink.h> 17 #include <net/pkt_cls.h> 18 #include <net/tc_act/tc_mirred.h> 19 #include <linux/if_bridge.h> 20 #include <linux/netpoll.h> 21 #include <linux/ptp_classify.h> 22 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->ops->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->ops->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.%d", 53 ds->dst->index, ds->index); 54 ds->slave_mii_bus->parent = ds->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 return dsa_slave_to_master(dev)->ifindex; 63 } 64 65 static int dsa_slave_open(struct net_device *dev) 66 { 67 struct net_device *master = dsa_slave_to_master(dev); 68 struct dsa_port *dp = dsa_slave_to_port(dev); 69 int err; 70 71 if (!(master->flags & IFF_UP)) 72 return -ENETDOWN; 73 74 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 75 err = dev_uc_add(master, dev->dev_addr); 76 if (err < 0) 77 goto out; 78 } 79 80 if (dev->flags & IFF_ALLMULTI) { 81 err = dev_set_allmulti(master, 1); 82 if (err < 0) 83 goto del_unicast; 84 } 85 if (dev->flags & IFF_PROMISC) { 86 err = dev_set_promiscuity(master, 1); 87 if (err < 0) 88 goto clear_allmulti; 89 } 90 91 err = dsa_port_enable_rt(dp, dev->phydev); 92 if (err) 93 goto clear_promisc; 94 95 return 0; 96 97 clear_promisc: 98 if (dev->flags & IFF_PROMISC) 99 dev_set_promiscuity(master, -1); 100 clear_allmulti: 101 if (dev->flags & IFF_ALLMULTI) 102 dev_set_allmulti(master, -1); 103 del_unicast: 104 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 105 dev_uc_del(master, dev->dev_addr); 106 out: 107 return err; 108 } 109 110 static int dsa_slave_close(struct net_device *dev) 111 { 112 struct net_device *master = dsa_slave_to_master(dev); 113 struct dsa_port *dp = dsa_slave_to_port(dev); 114 115 dsa_port_disable_rt(dp); 116 117 dev_mc_unsync(master, dev); 118 dev_uc_unsync(master, dev); 119 if (dev->flags & IFF_ALLMULTI) 120 dev_set_allmulti(master, -1); 121 if (dev->flags & IFF_PROMISC) 122 dev_set_promiscuity(master, -1); 123 124 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 125 dev_uc_del(master, dev->dev_addr); 126 127 return 0; 128 } 129 130 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 131 { 132 struct net_device *master = dsa_slave_to_master(dev); 133 if (dev->flags & IFF_UP) { 134 if (change & IFF_ALLMULTI) 135 dev_set_allmulti(master, 136 dev->flags & IFF_ALLMULTI ? 1 : -1); 137 if (change & IFF_PROMISC) 138 dev_set_promiscuity(master, 139 dev->flags & IFF_PROMISC ? 1 : -1); 140 } 141 } 142 143 static void dsa_slave_set_rx_mode(struct net_device *dev) 144 { 145 struct net_device *master = dsa_slave_to_master(dev); 146 147 dev_mc_sync(master, dev); 148 dev_uc_sync(master, dev); 149 } 150 151 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 152 { 153 struct net_device *master = dsa_slave_to_master(dev); 154 struct sockaddr *addr = a; 155 int err; 156 157 if (!is_valid_ether_addr(addr->sa_data)) 158 return -EADDRNOTAVAIL; 159 160 if (!(dev->flags & IFF_UP)) 161 goto out; 162 163 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 164 err = dev_uc_add(master, addr->sa_data); 165 if (err < 0) 166 return err; 167 } 168 169 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 170 dev_uc_del(master, dev->dev_addr); 171 172 out: 173 ether_addr_copy(dev->dev_addr, addr->sa_data); 174 175 return 0; 176 } 177 178 struct dsa_slave_dump_ctx { 179 struct net_device *dev; 180 struct sk_buff *skb; 181 struct netlink_callback *cb; 182 int idx; 183 }; 184 185 static int 186 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 187 bool is_static, void *data) 188 { 189 struct dsa_slave_dump_ctx *dump = data; 190 u32 portid = NETLINK_CB(dump->cb->skb).portid; 191 u32 seq = dump->cb->nlh->nlmsg_seq; 192 struct nlmsghdr *nlh; 193 struct ndmsg *ndm; 194 195 if (dump->idx < dump->cb->args[2]) 196 goto skip; 197 198 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 199 sizeof(*ndm), NLM_F_MULTI); 200 if (!nlh) 201 return -EMSGSIZE; 202 203 ndm = nlmsg_data(nlh); 204 ndm->ndm_family = AF_BRIDGE; 205 ndm->ndm_pad1 = 0; 206 ndm->ndm_pad2 = 0; 207 ndm->ndm_flags = NTF_SELF; 208 ndm->ndm_type = 0; 209 ndm->ndm_ifindex = dump->dev->ifindex; 210 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 211 212 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 213 goto nla_put_failure; 214 215 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 216 goto nla_put_failure; 217 218 nlmsg_end(dump->skb, nlh); 219 220 skip: 221 dump->idx++; 222 return 0; 223 224 nla_put_failure: 225 nlmsg_cancel(dump->skb, nlh); 226 return -EMSGSIZE; 227 } 228 229 static int 230 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 231 struct net_device *dev, struct net_device *filter_dev, 232 int *idx) 233 { 234 struct dsa_port *dp = dsa_slave_to_port(dev); 235 struct dsa_slave_dump_ctx dump = { 236 .dev = dev, 237 .skb = skb, 238 .cb = cb, 239 .idx = *idx, 240 }; 241 int err; 242 243 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 244 *idx = dump.idx; 245 246 return err; 247 } 248 249 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 250 { 251 struct dsa_slave_priv *p = netdev_priv(dev); 252 struct dsa_switch *ds = p->dp->ds; 253 int port = p->dp->index; 254 255 /* Pass through to switch driver if it supports timestamping */ 256 switch (cmd) { 257 case SIOCGHWTSTAMP: 258 if (ds->ops->port_hwtstamp_get) 259 return ds->ops->port_hwtstamp_get(ds, port, ifr); 260 break; 261 case SIOCSHWTSTAMP: 262 if (ds->ops->port_hwtstamp_set) 263 return ds->ops->port_hwtstamp_set(ds, port, ifr); 264 break; 265 } 266 267 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 268 } 269 270 static int dsa_slave_port_attr_set(struct net_device *dev, 271 const struct switchdev_attr *attr, 272 struct switchdev_trans *trans) 273 { 274 struct dsa_port *dp = dsa_slave_to_port(dev); 275 int ret; 276 277 switch (attr->id) { 278 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 279 ret = dsa_port_set_state(dp, attr->u.stp_state, trans); 280 break; 281 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 282 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 283 trans); 284 break; 285 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 286 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans); 287 break; 288 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 289 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 290 trans); 291 break; 292 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 293 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans); 294 break; 295 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER: 296 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, trans); 297 break; 298 default: 299 ret = -EOPNOTSUPP; 300 break; 301 } 302 303 return ret; 304 } 305 306 static int dsa_slave_vlan_add(struct net_device *dev, 307 const struct switchdev_obj *obj, 308 struct switchdev_trans *trans) 309 { 310 struct dsa_port *dp = dsa_slave_to_port(dev); 311 struct switchdev_obj_port_vlan vlan; 312 int err; 313 314 if (obj->orig_dev != dev) 315 return -EOPNOTSUPP; 316 317 if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev)) 318 return 0; 319 320 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 321 322 err = dsa_port_vlan_add(dp, &vlan, trans); 323 if (err) 324 return err; 325 326 /* We need the dedicated CPU port to be a member of the VLAN as well. 327 * Even though drivers often handle CPU membership in special ways, 328 * it doesn't make sense to program a PVID, so clear this flag. 329 */ 330 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 331 332 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, trans); 333 if (err) 334 return err; 335 336 return 0; 337 } 338 339 static int dsa_slave_port_obj_add(struct net_device *dev, 340 const struct switchdev_obj *obj, 341 struct switchdev_trans *trans, 342 struct netlink_ext_ack *extack) 343 { 344 struct dsa_port *dp = dsa_slave_to_port(dev); 345 int err; 346 347 /* For the prepare phase, ensure the full set of changes is feasable in 348 * one go in order to signal a failure properly. If an operation is not 349 * supported, return -EOPNOTSUPP. 350 */ 351 352 switch (obj->id) { 353 case SWITCHDEV_OBJ_ID_PORT_MDB: 354 if (obj->orig_dev != dev) 355 return -EOPNOTSUPP; 356 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans); 357 break; 358 case SWITCHDEV_OBJ_ID_HOST_MDB: 359 /* DSA can directly translate this to a normal MDB add, 360 * but on the CPU port. 361 */ 362 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj), 363 trans); 364 break; 365 case SWITCHDEV_OBJ_ID_PORT_VLAN: 366 err = dsa_slave_vlan_add(dev, obj, trans); 367 break; 368 default: 369 err = -EOPNOTSUPP; 370 break; 371 } 372 373 return err; 374 } 375 376 static int dsa_slave_vlan_del(struct net_device *dev, 377 const struct switchdev_obj *obj) 378 { 379 struct dsa_port *dp = dsa_slave_to_port(dev); 380 381 if (obj->orig_dev != dev) 382 return -EOPNOTSUPP; 383 384 if (dp->bridge_dev && !br_vlan_enabled(dp->bridge_dev)) 385 return 0; 386 387 /* Do not deprogram the CPU port as it may be shared with other user 388 * ports which can be members of this VLAN as well. 389 */ 390 return dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj)); 391 } 392 393 static int dsa_slave_port_obj_del(struct net_device *dev, 394 const struct switchdev_obj *obj) 395 { 396 struct dsa_port *dp = dsa_slave_to_port(dev); 397 int err; 398 399 switch (obj->id) { 400 case SWITCHDEV_OBJ_ID_PORT_MDB: 401 if (obj->orig_dev != dev) 402 return -EOPNOTSUPP; 403 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 404 break; 405 case SWITCHDEV_OBJ_ID_HOST_MDB: 406 /* DSA can directly translate this to a normal MDB add, 407 * but on the CPU port. 408 */ 409 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 410 break; 411 case SWITCHDEV_OBJ_ID_PORT_VLAN: 412 err = dsa_slave_vlan_del(dev, obj); 413 break; 414 default: 415 err = -EOPNOTSUPP; 416 break; 417 } 418 419 return err; 420 } 421 422 static int dsa_slave_get_port_parent_id(struct net_device *dev, 423 struct netdev_phys_item_id *ppid) 424 { 425 struct dsa_port *dp = dsa_slave_to_port(dev); 426 struct dsa_switch *ds = dp->ds; 427 struct dsa_switch_tree *dst = ds->dst; 428 429 /* For non-legacy ports, devlink is used and it takes 430 * care of the name generation. This ndo implementation 431 * should be removed with legacy support. 432 */ 433 if (dp->ds->devlink) 434 return -EOPNOTSUPP; 435 436 ppid->id_len = sizeof(dst->index); 437 memcpy(&ppid->id, &dst->index, ppid->id_len); 438 439 return 0; 440 } 441 442 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 443 struct sk_buff *skb) 444 { 445 #ifdef CONFIG_NET_POLL_CONTROLLER 446 struct dsa_slave_priv *p = netdev_priv(dev); 447 448 if (p->netpoll) 449 netpoll_send_skb(p->netpoll, skb); 450 #else 451 BUG(); 452 #endif 453 return NETDEV_TX_OK; 454 } 455 456 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 457 struct sk_buff *skb) 458 { 459 struct dsa_switch *ds = p->dp->ds; 460 struct sk_buff *clone; 461 unsigned int type; 462 463 type = ptp_classify_raw(skb); 464 if (type == PTP_CLASS_NONE) 465 return; 466 467 if (!ds->ops->port_txtstamp) 468 return; 469 470 clone = skb_clone_sk(skb); 471 if (!clone) 472 return; 473 474 DSA_SKB_CB(skb)->clone = clone; 475 476 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) 477 return; 478 479 kfree_skb(clone); 480 } 481 482 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 483 { 484 /* SKB for netpoll still need to be mangled with the protocol-specific 485 * tag to be successfully transmitted 486 */ 487 if (unlikely(netpoll_tx_running(dev))) 488 return dsa_slave_netpoll_send_skb(dev, skb); 489 490 /* Queue the SKB for transmission on the parent interface, but 491 * do not modify its EtherType 492 */ 493 skb->dev = dsa_slave_to_master(dev); 494 dev_queue_xmit(skb); 495 496 return NETDEV_TX_OK; 497 } 498 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 499 500 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 501 { 502 struct dsa_slave_priv *p = netdev_priv(dev); 503 struct pcpu_sw_netstats *s; 504 struct sk_buff *nskb; 505 506 s = this_cpu_ptr(p->stats64); 507 u64_stats_update_begin(&s->syncp); 508 s->tx_packets++; 509 s->tx_bytes += skb->len; 510 u64_stats_update_end(&s->syncp); 511 512 DSA_SKB_CB(skb)->clone = NULL; 513 514 /* Identify PTP protocol packets, clone them, and pass them to the 515 * switch driver 516 */ 517 dsa_skb_tx_timestamp(p, skb); 518 519 /* Transmit function may have to reallocate the original SKB, 520 * in which case it must have freed it. Only free it here on error. 521 */ 522 nskb = p->xmit(skb, dev); 523 if (!nskb) { 524 kfree_skb(skb); 525 return NETDEV_TX_OK; 526 } 527 528 return dsa_enqueue_skb(nskb, dev); 529 } 530 531 /* ethtool operations *******************************************************/ 532 533 static void dsa_slave_get_drvinfo(struct net_device *dev, 534 struct ethtool_drvinfo *drvinfo) 535 { 536 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 537 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 538 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 539 } 540 541 static int dsa_slave_get_regs_len(struct net_device *dev) 542 { 543 struct dsa_port *dp = dsa_slave_to_port(dev); 544 struct dsa_switch *ds = dp->ds; 545 546 if (ds->ops->get_regs_len) 547 return ds->ops->get_regs_len(ds, dp->index); 548 549 return -EOPNOTSUPP; 550 } 551 552 static void 553 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 554 { 555 struct dsa_port *dp = dsa_slave_to_port(dev); 556 struct dsa_switch *ds = dp->ds; 557 558 if (ds->ops->get_regs) 559 ds->ops->get_regs(ds, dp->index, regs, _p); 560 } 561 562 static int dsa_slave_nway_reset(struct net_device *dev) 563 { 564 struct dsa_port *dp = dsa_slave_to_port(dev); 565 566 return phylink_ethtool_nway_reset(dp->pl); 567 } 568 569 static int dsa_slave_get_eeprom_len(struct net_device *dev) 570 { 571 struct dsa_port *dp = dsa_slave_to_port(dev); 572 struct dsa_switch *ds = dp->ds; 573 574 if (ds->cd && ds->cd->eeprom_len) 575 return ds->cd->eeprom_len; 576 577 if (ds->ops->get_eeprom_len) 578 return ds->ops->get_eeprom_len(ds); 579 580 return 0; 581 } 582 583 static int dsa_slave_get_eeprom(struct net_device *dev, 584 struct ethtool_eeprom *eeprom, u8 *data) 585 { 586 struct dsa_port *dp = dsa_slave_to_port(dev); 587 struct dsa_switch *ds = dp->ds; 588 589 if (ds->ops->get_eeprom) 590 return ds->ops->get_eeprom(ds, eeprom, data); 591 592 return -EOPNOTSUPP; 593 } 594 595 static int dsa_slave_set_eeprom(struct net_device *dev, 596 struct ethtool_eeprom *eeprom, u8 *data) 597 { 598 struct dsa_port *dp = dsa_slave_to_port(dev); 599 struct dsa_switch *ds = dp->ds; 600 601 if (ds->ops->set_eeprom) 602 return ds->ops->set_eeprom(ds, eeprom, data); 603 604 return -EOPNOTSUPP; 605 } 606 607 static void dsa_slave_get_strings(struct net_device *dev, 608 uint32_t stringset, uint8_t *data) 609 { 610 struct dsa_port *dp = dsa_slave_to_port(dev); 611 struct dsa_switch *ds = dp->ds; 612 613 if (stringset == ETH_SS_STATS) { 614 int len = ETH_GSTRING_LEN; 615 616 strncpy(data, "tx_packets", len); 617 strncpy(data + len, "tx_bytes", len); 618 strncpy(data + 2 * len, "rx_packets", len); 619 strncpy(data + 3 * len, "rx_bytes", len); 620 if (ds->ops->get_strings) 621 ds->ops->get_strings(ds, dp->index, stringset, 622 data + 4 * len); 623 } 624 } 625 626 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 627 struct ethtool_stats *stats, 628 uint64_t *data) 629 { 630 struct dsa_port *dp = dsa_slave_to_port(dev); 631 struct dsa_slave_priv *p = netdev_priv(dev); 632 struct dsa_switch *ds = dp->ds; 633 struct pcpu_sw_netstats *s; 634 unsigned int start; 635 int i; 636 637 for_each_possible_cpu(i) { 638 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 639 640 s = per_cpu_ptr(p->stats64, i); 641 do { 642 start = u64_stats_fetch_begin_irq(&s->syncp); 643 tx_packets = s->tx_packets; 644 tx_bytes = s->tx_bytes; 645 rx_packets = s->rx_packets; 646 rx_bytes = s->rx_bytes; 647 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 648 data[0] += tx_packets; 649 data[1] += tx_bytes; 650 data[2] += rx_packets; 651 data[3] += rx_bytes; 652 } 653 if (ds->ops->get_ethtool_stats) 654 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 655 } 656 657 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 658 { 659 struct dsa_port *dp = dsa_slave_to_port(dev); 660 struct dsa_switch *ds = dp->ds; 661 662 if (sset == ETH_SS_STATS) { 663 int count; 664 665 count = 4; 666 if (ds->ops->get_sset_count) 667 count += ds->ops->get_sset_count(ds, dp->index, sset); 668 669 return count; 670 } 671 672 return -EOPNOTSUPP; 673 } 674 675 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 676 { 677 struct dsa_port *dp = dsa_slave_to_port(dev); 678 struct dsa_switch *ds = dp->ds; 679 680 phylink_ethtool_get_wol(dp->pl, w); 681 682 if (ds->ops->get_wol) 683 ds->ops->get_wol(ds, dp->index, w); 684 } 685 686 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 687 { 688 struct dsa_port *dp = dsa_slave_to_port(dev); 689 struct dsa_switch *ds = dp->ds; 690 int ret = -EOPNOTSUPP; 691 692 phylink_ethtool_set_wol(dp->pl, w); 693 694 if (ds->ops->set_wol) 695 ret = ds->ops->set_wol(ds, dp->index, w); 696 697 return ret; 698 } 699 700 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 701 { 702 struct dsa_port *dp = dsa_slave_to_port(dev); 703 struct dsa_switch *ds = dp->ds; 704 int ret; 705 706 /* Port's PHY and MAC both need to be EEE capable */ 707 if (!dev->phydev || !dp->pl) 708 return -ENODEV; 709 710 if (!ds->ops->set_mac_eee) 711 return -EOPNOTSUPP; 712 713 ret = ds->ops->set_mac_eee(ds, dp->index, e); 714 if (ret) 715 return ret; 716 717 return phylink_ethtool_set_eee(dp->pl, e); 718 } 719 720 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 721 { 722 struct dsa_port *dp = dsa_slave_to_port(dev); 723 struct dsa_switch *ds = dp->ds; 724 int ret; 725 726 /* Port's PHY and MAC both need to be EEE capable */ 727 if (!dev->phydev || !dp->pl) 728 return -ENODEV; 729 730 if (!ds->ops->get_mac_eee) 731 return -EOPNOTSUPP; 732 733 ret = ds->ops->get_mac_eee(ds, dp->index, e); 734 if (ret) 735 return ret; 736 737 return phylink_ethtool_get_eee(dp->pl, e); 738 } 739 740 static int dsa_slave_get_link_ksettings(struct net_device *dev, 741 struct ethtool_link_ksettings *cmd) 742 { 743 struct dsa_port *dp = dsa_slave_to_port(dev); 744 745 return phylink_ethtool_ksettings_get(dp->pl, cmd); 746 } 747 748 static int dsa_slave_set_link_ksettings(struct net_device *dev, 749 const struct ethtool_link_ksettings *cmd) 750 { 751 struct dsa_port *dp = dsa_slave_to_port(dev); 752 753 return phylink_ethtool_ksettings_set(dp->pl, cmd); 754 } 755 756 static void dsa_slave_get_pauseparam(struct net_device *dev, 757 struct ethtool_pauseparam *pause) 758 { 759 struct dsa_port *dp = dsa_slave_to_port(dev); 760 761 phylink_ethtool_get_pauseparam(dp->pl, pause); 762 } 763 764 static int dsa_slave_set_pauseparam(struct net_device *dev, 765 struct ethtool_pauseparam *pause) 766 { 767 struct dsa_port *dp = dsa_slave_to_port(dev); 768 769 return phylink_ethtool_set_pauseparam(dp->pl, pause); 770 } 771 772 #ifdef CONFIG_NET_POLL_CONTROLLER 773 static int dsa_slave_netpoll_setup(struct net_device *dev, 774 struct netpoll_info *ni) 775 { 776 struct net_device *master = dsa_slave_to_master(dev); 777 struct dsa_slave_priv *p = netdev_priv(dev); 778 struct netpoll *netpoll; 779 int err = 0; 780 781 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 782 if (!netpoll) 783 return -ENOMEM; 784 785 err = __netpoll_setup(netpoll, master); 786 if (err) { 787 kfree(netpoll); 788 goto out; 789 } 790 791 p->netpoll = netpoll; 792 out: 793 return err; 794 } 795 796 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 797 { 798 struct dsa_slave_priv *p = netdev_priv(dev); 799 struct netpoll *netpoll = p->netpoll; 800 801 if (!netpoll) 802 return; 803 804 p->netpoll = NULL; 805 806 __netpoll_free(netpoll); 807 } 808 809 static void dsa_slave_poll_controller(struct net_device *dev) 810 { 811 } 812 #endif 813 814 static int dsa_slave_get_phys_port_name(struct net_device *dev, 815 char *name, size_t len) 816 { 817 struct dsa_port *dp = dsa_slave_to_port(dev); 818 819 /* For non-legacy ports, devlink is used and it takes 820 * care of the name generation. This ndo implementation 821 * should be removed with legacy support. 822 */ 823 if (dp->ds->devlink) 824 return -EOPNOTSUPP; 825 826 if (snprintf(name, len, "p%d", dp->index) >= len) 827 return -EINVAL; 828 829 return 0; 830 } 831 832 static struct dsa_mall_tc_entry * 833 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 834 { 835 struct dsa_slave_priv *p = netdev_priv(dev); 836 struct dsa_mall_tc_entry *mall_tc_entry; 837 838 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 839 if (mall_tc_entry->cookie == cookie) 840 return mall_tc_entry; 841 842 return NULL; 843 } 844 845 static int dsa_slave_add_cls_matchall(struct net_device *dev, 846 struct tc_cls_matchall_offload *cls, 847 bool ingress) 848 { 849 struct dsa_port *dp = dsa_slave_to_port(dev); 850 struct dsa_slave_priv *p = netdev_priv(dev); 851 struct dsa_mall_tc_entry *mall_tc_entry; 852 __be16 protocol = cls->common.protocol; 853 struct dsa_switch *ds = dp->ds; 854 struct flow_action_entry *act; 855 struct dsa_port *to_dp; 856 int err = -EOPNOTSUPP; 857 858 if (!ds->ops->port_mirror_add) 859 return err; 860 861 if (!flow_offload_has_one_action(&cls->rule->action)) 862 return err; 863 864 act = &cls->rule->action.entries[0]; 865 866 if (act->id == FLOW_ACTION_MIRRED && protocol == htons(ETH_P_ALL)) { 867 struct dsa_mall_mirror_tc_entry *mirror; 868 869 if (!act->dev) 870 return -EINVAL; 871 872 if (!dsa_slave_dev_check(act->dev)) 873 return -EOPNOTSUPP; 874 875 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 876 if (!mall_tc_entry) 877 return -ENOMEM; 878 879 mall_tc_entry->cookie = cls->cookie; 880 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 881 mirror = &mall_tc_entry->mirror; 882 883 to_dp = dsa_slave_to_port(act->dev); 884 885 mirror->to_local_port = to_dp->index; 886 mirror->ingress = ingress; 887 888 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); 889 if (err) { 890 kfree(mall_tc_entry); 891 return err; 892 } 893 894 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 895 } 896 897 return 0; 898 } 899 900 static void dsa_slave_del_cls_matchall(struct net_device *dev, 901 struct tc_cls_matchall_offload *cls) 902 { 903 struct dsa_port *dp = dsa_slave_to_port(dev); 904 struct dsa_mall_tc_entry *mall_tc_entry; 905 struct dsa_switch *ds = dp->ds; 906 907 if (!ds->ops->port_mirror_del) 908 return; 909 910 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 911 if (!mall_tc_entry) 912 return; 913 914 list_del(&mall_tc_entry->list); 915 916 switch (mall_tc_entry->type) { 917 case DSA_PORT_MALL_MIRROR: 918 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror); 919 break; 920 default: 921 WARN_ON(1); 922 } 923 924 kfree(mall_tc_entry); 925 } 926 927 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 928 struct tc_cls_matchall_offload *cls, 929 bool ingress) 930 { 931 if (cls->common.chain_index) 932 return -EOPNOTSUPP; 933 934 switch (cls->command) { 935 case TC_CLSMATCHALL_REPLACE: 936 return dsa_slave_add_cls_matchall(dev, cls, ingress); 937 case TC_CLSMATCHALL_DESTROY: 938 dsa_slave_del_cls_matchall(dev, cls); 939 return 0; 940 default: 941 return -EOPNOTSUPP; 942 } 943 } 944 945 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 946 void *cb_priv, bool ingress) 947 { 948 struct net_device *dev = cb_priv; 949 950 if (!tc_can_offload(dev)) 951 return -EOPNOTSUPP; 952 953 switch (type) { 954 case TC_SETUP_CLSMATCHALL: 955 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 956 default: 957 return -EOPNOTSUPP; 958 } 959 } 960 961 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 962 void *type_data, void *cb_priv) 963 { 964 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 965 } 966 967 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 968 void *type_data, void *cb_priv) 969 { 970 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 971 } 972 973 static LIST_HEAD(dsa_slave_block_cb_list); 974 975 static int dsa_slave_setup_tc_block(struct net_device *dev, 976 struct flow_block_offload *f) 977 { 978 struct flow_block_cb *block_cb; 979 flow_setup_cb_t *cb; 980 981 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 982 cb = dsa_slave_setup_tc_block_cb_ig; 983 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 984 cb = dsa_slave_setup_tc_block_cb_eg; 985 else 986 return -EOPNOTSUPP; 987 988 f->driver_block_list = &dsa_slave_block_cb_list; 989 990 switch (f->command) { 991 case FLOW_BLOCK_BIND: 992 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 993 return -EBUSY; 994 995 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 996 if (IS_ERR(block_cb)) 997 return PTR_ERR(block_cb); 998 999 flow_block_cb_add(block_cb, f); 1000 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1001 return 0; 1002 case FLOW_BLOCK_UNBIND: 1003 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1004 if (!block_cb) 1005 return -ENOENT; 1006 1007 flow_block_cb_remove(block_cb, f); 1008 list_del(&block_cb->driver_list); 1009 return 0; 1010 default: 1011 return -EOPNOTSUPP; 1012 } 1013 } 1014 1015 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1016 void *type_data) 1017 { 1018 struct dsa_port *dp = dsa_slave_to_port(dev); 1019 struct dsa_switch *ds = dp->ds; 1020 1021 if (type == TC_SETUP_BLOCK) 1022 return dsa_slave_setup_tc_block(dev, type_data); 1023 1024 if (!ds->ops->port_setup_tc) 1025 return -EOPNOTSUPP; 1026 1027 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1028 } 1029 1030 static void dsa_slave_get_stats64(struct net_device *dev, 1031 struct rtnl_link_stats64 *stats) 1032 { 1033 struct dsa_slave_priv *p = netdev_priv(dev); 1034 struct pcpu_sw_netstats *s; 1035 unsigned int start; 1036 int i; 1037 1038 netdev_stats_to_stats64(stats, &dev->stats); 1039 for_each_possible_cpu(i) { 1040 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 1041 1042 s = per_cpu_ptr(p->stats64, i); 1043 do { 1044 start = u64_stats_fetch_begin_irq(&s->syncp); 1045 tx_packets = s->tx_packets; 1046 tx_bytes = s->tx_bytes; 1047 rx_packets = s->rx_packets; 1048 rx_bytes = s->rx_bytes; 1049 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 1050 1051 stats->tx_packets += tx_packets; 1052 stats->tx_bytes += tx_bytes; 1053 stats->rx_packets += rx_packets; 1054 stats->rx_bytes += rx_bytes; 1055 } 1056 } 1057 1058 static int dsa_slave_get_rxnfc(struct net_device *dev, 1059 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1060 { 1061 struct dsa_port *dp = dsa_slave_to_port(dev); 1062 struct dsa_switch *ds = dp->ds; 1063 1064 if (!ds->ops->get_rxnfc) 1065 return -EOPNOTSUPP; 1066 1067 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1068 } 1069 1070 static int dsa_slave_set_rxnfc(struct net_device *dev, 1071 struct ethtool_rxnfc *nfc) 1072 { 1073 struct dsa_port *dp = dsa_slave_to_port(dev); 1074 struct dsa_switch *ds = dp->ds; 1075 1076 if (!ds->ops->set_rxnfc) 1077 return -EOPNOTSUPP; 1078 1079 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1080 } 1081 1082 static int dsa_slave_get_ts_info(struct net_device *dev, 1083 struct ethtool_ts_info *ts) 1084 { 1085 struct dsa_slave_priv *p = netdev_priv(dev); 1086 struct dsa_switch *ds = p->dp->ds; 1087 1088 if (!ds->ops->get_ts_info) 1089 return -EOPNOTSUPP; 1090 1091 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1092 } 1093 1094 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1095 u16 vid) 1096 { 1097 struct dsa_port *dp = dsa_slave_to_port(dev); 1098 struct bridge_vlan_info info; 1099 int ret; 1100 1101 /* Check for a possible bridge VLAN entry now since there is no 1102 * need to emulate the switchdev prepare + commit phase. 1103 */ 1104 if (dp->bridge_dev) { 1105 if (!br_vlan_enabled(dp->bridge_dev)) 1106 return 0; 1107 1108 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 1109 * device, respectively the VID is not found, returning 1110 * 0 means success, which is a failure for us here. 1111 */ 1112 ret = br_vlan_get_info(dp->bridge_dev, vid, &info); 1113 if (ret == 0) 1114 return -EBUSY; 1115 } 1116 1117 ret = dsa_port_vid_add(dp, vid, 0); 1118 if (ret) 1119 return ret; 1120 1121 ret = dsa_port_vid_add(dp->cpu_dp, vid, 0); 1122 if (ret) 1123 return ret; 1124 1125 return 0; 1126 } 1127 1128 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1129 u16 vid) 1130 { 1131 struct dsa_port *dp = dsa_slave_to_port(dev); 1132 struct bridge_vlan_info info; 1133 int ret; 1134 1135 /* Check for a possible bridge VLAN entry now since there is no 1136 * need to emulate the switchdev prepare + commit phase. 1137 */ 1138 if (dp->bridge_dev) { 1139 if (!br_vlan_enabled(dp->bridge_dev)) 1140 return 0; 1141 1142 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 1143 * device, respectively the VID is not found, returning 1144 * 0 means success, which is a failure for us here. 1145 */ 1146 ret = br_vlan_get_info(dp->bridge_dev, vid, &info); 1147 if (ret == 0) 1148 return -EBUSY; 1149 } 1150 1151 /* Do not deprogram the CPU port as it may be shared with other user 1152 * ports which can be members of this VLAN as well. 1153 */ 1154 return dsa_port_vid_del(dp, vid); 1155 } 1156 1157 static const struct ethtool_ops dsa_slave_ethtool_ops = { 1158 .get_drvinfo = dsa_slave_get_drvinfo, 1159 .get_regs_len = dsa_slave_get_regs_len, 1160 .get_regs = dsa_slave_get_regs, 1161 .nway_reset = dsa_slave_nway_reset, 1162 .get_link = ethtool_op_get_link, 1163 .get_eeprom_len = dsa_slave_get_eeprom_len, 1164 .get_eeprom = dsa_slave_get_eeprom, 1165 .set_eeprom = dsa_slave_set_eeprom, 1166 .get_strings = dsa_slave_get_strings, 1167 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 1168 .get_sset_count = dsa_slave_get_sset_count, 1169 .set_wol = dsa_slave_set_wol, 1170 .get_wol = dsa_slave_get_wol, 1171 .set_eee = dsa_slave_set_eee, 1172 .get_eee = dsa_slave_get_eee, 1173 .get_link_ksettings = dsa_slave_get_link_ksettings, 1174 .set_link_ksettings = dsa_slave_set_link_ksettings, 1175 .get_pauseparam = dsa_slave_get_pauseparam, 1176 .set_pauseparam = dsa_slave_set_pauseparam, 1177 .get_rxnfc = dsa_slave_get_rxnfc, 1178 .set_rxnfc = dsa_slave_set_rxnfc, 1179 .get_ts_info = dsa_slave_get_ts_info, 1180 }; 1181 1182 /* legacy way, bypassing the bridge *****************************************/ 1183 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 1184 struct net_device *dev, 1185 const unsigned char *addr, u16 vid, 1186 u16 flags, 1187 struct netlink_ext_ack *extack) 1188 { 1189 struct dsa_port *dp = dsa_slave_to_port(dev); 1190 1191 return dsa_port_fdb_add(dp, addr, vid); 1192 } 1193 1194 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 1195 struct net_device *dev, 1196 const unsigned char *addr, u16 vid) 1197 { 1198 struct dsa_port *dp = dsa_slave_to_port(dev); 1199 1200 return dsa_port_fdb_del(dp, addr, vid); 1201 } 1202 1203 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) 1204 { 1205 struct dsa_port *dp = dsa_slave_to_port(dev); 1206 1207 return dp->ds->devlink ? &dp->devlink_port : NULL; 1208 } 1209 1210 static const struct net_device_ops dsa_slave_netdev_ops = { 1211 .ndo_open = dsa_slave_open, 1212 .ndo_stop = dsa_slave_close, 1213 .ndo_start_xmit = dsa_slave_xmit, 1214 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 1215 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 1216 .ndo_set_mac_address = dsa_slave_set_mac_address, 1217 .ndo_fdb_add = dsa_legacy_fdb_add, 1218 .ndo_fdb_del = dsa_legacy_fdb_del, 1219 .ndo_fdb_dump = dsa_slave_fdb_dump, 1220 .ndo_do_ioctl = dsa_slave_ioctl, 1221 .ndo_get_iflink = dsa_slave_get_iflink, 1222 #ifdef CONFIG_NET_POLL_CONTROLLER 1223 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 1224 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 1225 .ndo_poll_controller = dsa_slave_poll_controller, 1226 #endif 1227 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 1228 .ndo_setup_tc = dsa_slave_setup_tc, 1229 .ndo_get_stats64 = dsa_slave_get_stats64, 1230 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id, 1231 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 1232 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 1233 .ndo_get_devlink_port = dsa_slave_get_devlink_port, 1234 }; 1235 1236 static struct device_type dsa_type = { 1237 .name = "dsa", 1238 }; 1239 1240 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 1241 { 1242 const struct dsa_port *dp = dsa_to_port(ds, port); 1243 1244 phylink_mac_change(dp->pl, up); 1245 } 1246 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 1247 1248 static void dsa_slave_phylink_fixed_state(struct net_device *dev, 1249 struct phylink_link_state *state) 1250 { 1251 struct dsa_port *dp = dsa_slave_to_port(dev); 1252 struct dsa_switch *ds = dp->ds; 1253 1254 /* No need to check that this operation is valid, the callback would 1255 * not be called if it was not. 1256 */ 1257 ds->ops->phylink_fixed_state(ds, dp->index, state); 1258 } 1259 1260 /* slave device setup *******************************************************/ 1261 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) 1262 { 1263 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1264 struct dsa_switch *ds = dp->ds; 1265 1266 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 1267 if (!slave_dev->phydev) { 1268 netdev_err(slave_dev, "no phy at %d\n", addr); 1269 return -ENODEV; 1270 } 1271 1272 return phylink_connect_phy(dp->pl, slave_dev->phydev); 1273 } 1274 1275 static int dsa_slave_phy_setup(struct net_device *slave_dev) 1276 { 1277 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1278 struct device_node *port_dn = dp->dn; 1279 struct dsa_switch *ds = dp->ds; 1280 phy_interface_t mode; 1281 u32 phy_flags = 0; 1282 int ret; 1283 1284 ret = of_get_phy_mode(port_dn, &mode); 1285 if (ret) 1286 mode = PHY_INTERFACE_MODE_NA; 1287 1288 dp->pl_config.dev = &slave_dev->dev; 1289 dp->pl_config.type = PHYLINK_NETDEV; 1290 1291 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode, 1292 &dsa_port_phylink_mac_ops); 1293 if (IS_ERR(dp->pl)) { 1294 netdev_err(slave_dev, 1295 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 1296 return PTR_ERR(dp->pl); 1297 } 1298 1299 /* Register only if the switch provides such a callback, since this 1300 * callback takes precedence over polling the link GPIO in PHYLINK 1301 * (see phylink_get_fixed_state). 1302 */ 1303 if (ds->ops->phylink_fixed_state) 1304 phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state); 1305 1306 if (ds->ops->get_phy_flags) 1307 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 1308 1309 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 1310 if (ret == -ENODEV && ds->slave_mii_bus) { 1311 /* We could not connect to a designated PHY or SFP, so try to 1312 * use the switch internal MDIO bus instead 1313 */ 1314 ret = dsa_slave_phy_connect(slave_dev, dp->index); 1315 if (ret) { 1316 netdev_err(slave_dev, 1317 "failed to connect to port %d: %d\n", 1318 dp->index, ret); 1319 phylink_destroy(dp->pl); 1320 return ret; 1321 } 1322 } 1323 1324 return ret; 1325 } 1326 1327 int dsa_slave_suspend(struct net_device *slave_dev) 1328 { 1329 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1330 1331 if (!netif_running(slave_dev)) 1332 return 0; 1333 1334 netif_device_detach(slave_dev); 1335 1336 rtnl_lock(); 1337 phylink_stop(dp->pl); 1338 rtnl_unlock(); 1339 1340 return 0; 1341 } 1342 1343 int dsa_slave_resume(struct net_device *slave_dev) 1344 { 1345 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1346 1347 if (!netif_running(slave_dev)) 1348 return 0; 1349 1350 netif_device_attach(slave_dev); 1351 1352 rtnl_lock(); 1353 phylink_start(dp->pl); 1354 rtnl_unlock(); 1355 1356 return 0; 1357 } 1358 1359 static void dsa_slave_notify(struct net_device *dev, unsigned long val) 1360 { 1361 struct net_device *master = dsa_slave_to_master(dev); 1362 struct dsa_port *dp = dsa_slave_to_port(dev); 1363 struct dsa_notifier_register_info rinfo = { 1364 .switch_number = dp->ds->index, 1365 .port_number = dp->index, 1366 .master = master, 1367 .info.dev = dev, 1368 }; 1369 1370 call_dsa_notifiers(val, dev, &rinfo.info); 1371 } 1372 1373 int dsa_slave_create(struct dsa_port *port) 1374 { 1375 const struct dsa_port *cpu_dp = port->cpu_dp; 1376 struct net_device *master = cpu_dp->master; 1377 struct dsa_switch *ds = port->ds; 1378 const char *name = port->name; 1379 struct net_device *slave_dev; 1380 struct dsa_slave_priv *p; 1381 int ret; 1382 1383 if (!ds->num_tx_queues) 1384 ds->num_tx_queues = 1; 1385 1386 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 1387 NET_NAME_UNKNOWN, ether_setup, 1388 ds->num_tx_queues, 1); 1389 if (slave_dev == NULL) 1390 return -ENOMEM; 1391 1392 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1393 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del) 1394 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1395 slave_dev->hw_features |= NETIF_F_HW_TC; 1396 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1397 if (!IS_ERR_OR_NULL(port->mac)) 1398 ether_addr_copy(slave_dev->dev_addr, port->mac); 1399 else 1400 eth_hw_addr_inherit(slave_dev, master); 1401 slave_dev->priv_flags |= IFF_NO_QUEUE; 1402 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1403 slave_dev->min_mtu = 0; 1404 slave_dev->max_mtu = ETH_MAX_MTU; 1405 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1406 1407 SET_NETDEV_DEV(slave_dev, port->ds->dev); 1408 slave_dev->dev.of_node = port->dn; 1409 slave_dev->vlan_features = master->vlan_features; 1410 1411 p = netdev_priv(slave_dev); 1412 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1413 if (!p->stats64) { 1414 free_netdev(slave_dev); 1415 return -ENOMEM; 1416 } 1417 p->dp = port; 1418 INIT_LIST_HEAD(&p->mall_tc_list); 1419 p->xmit = cpu_dp->tag_ops->xmit; 1420 port->slave = slave_dev; 1421 1422 netif_carrier_off(slave_dev); 1423 1424 ret = dsa_slave_phy_setup(slave_dev); 1425 if (ret) { 1426 netdev_err(master, "error %d setting up slave phy\n", ret); 1427 goto out_free; 1428 } 1429 1430 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER); 1431 1432 ret = register_netdev(slave_dev); 1433 if (ret) { 1434 netdev_err(master, "error %d registering interface %s\n", 1435 ret, slave_dev->name); 1436 goto out_phy; 1437 } 1438 1439 return 0; 1440 1441 out_phy: 1442 rtnl_lock(); 1443 phylink_disconnect_phy(p->dp->pl); 1444 rtnl_unlock(); 1445 phylink_destroy(p->dp->pl); 1446 out_free: 1447 free_percpu(p->stats64); 1448 free_netdev(slave_dev); 1449 port->slave = NULL; 1450 return ret; 1451 } 1452 1453 void dsa_slave_destroy(struct net_device *slave_dev) 1454 { 1455 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1456 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1457 1458 netif_carrier_off(slave_dev); 1459 rtnl_lock(); 1460 phylink_disconnect_phy(dp->pl); 1461 rtnl_unlock(); 1462 1463 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER); 1464 unregister_netdev(slave_dev); 1465 phylink_destroy(dp->pl); 1466 free_percpu(p->stats64); 1467 free_netdev(slave_dev); 1468 } 1469 1470 bool dsa_slave_dev_check(const struct net_device *dev) 1471 { 1472 return dev->netdev_ops == &dsa_slave_netdev_ops; 1473 } 1474 1475 static int dsa_slave_changeupper(struct net_device *dev, 1476 struct netdev_notifier_changeupper_info *info) 1477 { 1478 struct dsa_port *dp = dsa_slave_to_port(dev); 1479 int err = NOTIFY_DONE; 1480 1481 if (netif_is_bridge_master(info->upper_dev)) { 1482 if (info->linking) { 1483 err = dsa_port_bridge_join(dp, info->upper_dev); 1484 err = notifier_from_errno(err); 1485 } else { 1486 dsa_port_bridge_leave(dp, info->upper_dev); 1487 err = NOTIFY_OK; 1488 } 1489 } 1490 1491 return err; 1492 } 1493 1494 static int dsa_slave_upper_vlan_check(struct net_device *dev, 1495 struct netdev_notifier_changeupper_info * 1496 info) 1497 { 1498 struct netlink_ext_ack *ext_ack; 1499 struct net_device *slave; 1500 struct dsa_port *dp; 1501 1502 ext_ack = netdev_notifier_info_to_extack(&info->info); 1503 1504 if (!is_vlan_dev(dev)) 1505 return NOTIFY_DONE; 1506 1507 slave = vlan_dev_real_dev(dev); 1508 if (!dsa_slave_dev_check(slave)) 1509 return NOTIFY_DONE; 1510 1511 dp = dsa_slave_to_port(slave); 1512 if (!dp->bridge_dev) 1513 return NOTIFY_DONE; 1514 1515 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 1516 if (br_vlan_enabled(dp->bridge_dev) && 1517 netif_is_bridge_master(info->upper_dev) && info->linking) { 1518 NL_SET_ERR_MSG_MOD(ext_ack, 1519 "Cannot enslave VLAN device into VLAN aware bridge"); 1520 return notifier_from_errno(-EINVAL); 1521 } 1522 1523 return NOTIFY_DONE; 1524 } 1525 1526 static int dsa_slave_netdevice_event(struct notifier_block *nb, 1527 unsigned long event, void *ptr) 1528 { 1529 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1530 1531 if (event == NETDEV_CHANGEUPPER) { 1532 if (!dsa_slave_dev_check(dev)) 1533 return dsa_slave_upper_vlan_check(dev, ptr); 1534 1535 return dsa_slave_changeupper(dev, ptr); 1536 } 1537 1538 return NOTIFY_DONE; 1539 } 1540 1541 struct dsa_switchdev_event_work { 1542 struct work_struct work; 1543 struct switchdev_notifier_fdb_info fdb_info; 1544 struct net_device *dev; 1545 unsigned long event; 1546 }; 1547 1548 static void dsa_slave_switchdev_event_work(struct work_struct *work) 1549 { 1550 struct dsa_switchdev_event_work *switchdev_work = 1551 container_of(work, struct dsa_switchdev_event_work, work); 1552 struct net_device *dev = switchdev_work->dev; 1553 struct switchdev_notifier_fdb_info *fdb_info; 1554 struct dsa_port *dp = dsa_slave_to_port(dev); 1555 int err; 1556 1557 rtnl_lock(); 1558 switch (switchdev_work->event) { 1559 case SWITCHDEV_FDB_ADD_TO_DEVICE: 1560 fdb_info = &switchdev_work->fdb_info; 1561 if (!fdb_info->added_by_user) 1562 break; 1563 1564 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid); 1565 if (err) { 1566 netdev_dbg(dev, "fdb add failed err=%d\n", err); 1567 break; 1568 } 1569 fdb_info->offloaded = true; 1570 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev, 1571 &fdb_info->info, NULL); 1572 break; 1573 1574 case SWITCHDEV_FDB_DEL_TO_DEVICE: 1575 fdb_info = &switchdev_work->fdb_info; 1576 if (!fdb_info->added_by_user) 1577 break; 1578 1579 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid); 1580 if (err) { 1581 netdev_dbg(dev, "fdb del failed err=%d\n", err); 1582 dev_close(dev); 1583 } 1584 break; 1585 } 1586 rtnl_unlock(); 1587 1588 kfree(switchdev_work->fdb_info.addr); 1589 kfree(switchdev_work); 1590 dev_put(dev); 1591 } 1592 1593 static int 1594 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work * 1595 switchdev_work, 1596 const struct switchdev_notifier_fdb_info * 1597 fdb_info) 1598 { 1599 memcpy(&switchdev_work->fdb_info, fdb_info, 1600 sizeof(switchdev_work->fdb_info)); 1601 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC); 1602 if (!switchdev_work->fdb_info.addr) 1603 return -ENOMEM; 1604 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr, 1605 fdb_info->addr); 1606 return 0; 1607 } 1608 1609 /* Called under rcu_read_lock() */ 1610 static int dsa_slave_switchdev_event(struct notifier_block *unused, 1611 unsigned long event, void *ptr) 1612 { 1613 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 1614 struct dsa_switchdev_event_work *switchdev_work; 1615 int err; 1616 1617 if (event == SWITCHDEV_PORT_ATTR_SET) { 1618 err = switchdev_handle_port_attr_set(dev, ptr, 1619 dsa_slave_dev_check, 1620 dsa_slave_port_attr_set); 1621 return notifier_from_errno(err); 1622 } 1623 1624 if (!dsa_slave_dev_check(dev)) 1625 return NOTIFY_DONE; 1626 1627 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 1628 if (!switchdev_work) 1629 return NOTIFY_BAD; 1630 1631 INIT_WORK(&switchdev_work->work, 1632 dsa_slave_switchdev_event_work); 1633 switchdev_work->dev = dev; 1634 switchdev_work->event = event; 1635 1636 switch (event) { 1637 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */ 1638 case SWITCHDEV_FDB_DEL_TO_DEVICE: 1639 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr)) 1640 goto err_fdb_work_init; 1641 dev_hold(dev); 1642 break; 1643 default: 1644 kfree(switchdev_work); 1645 return NOTIFY_DONE; 1646 } 1647 1648 dsa_schedule_work(&switchdev_work->work); 1649 return NOTIFY_OK; 1650 1651 err_fdb_work_init: 1652 kfree(switchdev_work); 1653 return NOTIFY_BAD; 1654 } 1655 1656 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 1657 unsigned long event, void *ptr) 1658 { 1659 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 1660 int err; 1661 1662 switch (event) { 1663 case SWITCHDEV_PORT_OBJ_ADD: 1664 err = switchdev_handle_port_obj_add(dev, ptr, 1665 dsa_slave_dev_check, 1666 dsa_slave_port_obj_add); 1667 return notifier_from_errno(err); 1668 case SWITCHDEV_PORT_OBJ_DEL: 1669 err = switchdev_handle_port_obj_del(dev, ptr, 1670 dsa_slave_dev_check, 1671 dsa_slave_port_obj_del); 1672 return notifier_from_errno(err); 1673 case SWITCHDEV_PORT_ATTR_SET: 1674 err = switchdev_handle_port_attr_set(dev, ptr, 1675 dsa_slave_dev_check, 1676 dsa_slave_port_attr_set); 1677 return notifier_from_errno(err); 1678 } 1679 1680 return NOTIFY_DONE; 1681 } 1682 1683 static struct notifier_block dsa_slave_nb __read_mostly = { 1684 .notifier_call = dsa_slave_netdevice_event, 1685 }; 1686 1687 static struct notifier_block dsa_slave_switchdev_notifier = { 1688 .notifier_call = dsa_slave_switchdev_event, 1689 }; 1690 1691 static struct notifier_block dsa_slave_switchdev_blocking_notifier = { 1692 .notifier_call = dsa_slave_switchdev_blocking_event, 1693 }; 1694 1695 int dsa_slave_register_notifier(void) 1696 { 1697 struct notifier_block *nb; 1698 int err; 1699 1700 err = register_netdevice_notifier(&dsa_slave_nb); 1701 if (err) 1702 return err; 1703 1704 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 1705 if (err) 1706 goto err_switchdev_nb; 1707 1708 nb = &dsa_slave_switchdev_blocking_notifier; 1709 err = register_switchdev_blocking_notifier(nb); 1710 if (err) 1711 goto err_switchdev_blocking_nb; 1712 1713 return 0; 1714 1715 err_switchdev_blocking_nb: 1716 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 1717 err_switchdev_nb: 1718 unregister_netdevice_notifier(&dsa_slave_nb); 1719 return err; 1720 } 1721 1722 void dsa_slave_unregister_notifier(void) 1723 { 1724 struct notifier_block *nb; 1725 int err; 1726 1727 nb = &dsa_slave_switchdev_blocking_notifier; 1728 err = unregister_switchdev_blocking_notifier(nb); 1729 if (err) 1730 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 1731 1732 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 1733 if (err) 1734 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 1735 1736 err = unregister_netdevice_notifier(&dsa_slave_nb); 1737 if (err) 1738 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 1739 } 1740