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/pkt_cls.h> 21 #include <net/tc_act/tc_mirred.h> 22 #include <linux/if_bridge.h> 23 #include <linux/netpoll.h> 24 25 #include "dsa_priv.h" 26 27 static bool dsa_slave_dev_check(struct net_device *dev); 28 29 /* slave mii_bus handling ***************************************************/ 30 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 31 { 32 struct dsa_switch *ds = bus->priv; 33 34 if (ds->phys_mii_mask & (1 << addr)) 35 return ds->ops->phy_read(ds, addr, reg); 36 37 return 0xffff; 38 } 39 40 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 41 { 42 struct dsa_switch *ds = bus->priv; 43 44 if (ds->phys_mii_mask & (1 << addr)) 45 return ds->ops->phy_write(ds, addr, reg, val); 46 47 return 0; 48 } 49 50 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 51 { 52 ds->slave_mii_bus->priv = (void *)ds; 53 ds->slave_mii_bus->name = "dsa slave smi"; 54 ds->slave_mii_bus->read = dsa_slave_phy_read; 55 ds->slave_mii_bus->write = dsa_slave_phy_write; 56 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 57 ds->dst->index, ds->index); 58 ds->slave_mii_bus->parent = ds->dev; 59 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 60 } 61 62 63 /* slave device handling ****************************************************/ 64 static int dsa_slave_get_iflink(const struct net_device *dev) 65 { 66 return dsa_slave_to_master(dev)->ifindex; 67 } 68 69 static int dsa_slave_open(struct net_device *dev) 70 { 71 struct net_device *master = dsa_slave_to_master(dev); 72 struct dsa_port *dp = dsa_slave_to_port(dev); 73 int err; 74 75 if (!(master->flags & IFF_UP)) 76 return -ENETDOWN; 77 78 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 79 err = dev_uc_add(master, dev->dev_addr); 80 if (err < 0) 81 goto out; 82 } 83 84 if (dev->flags & IFF_ALLMULTI) { 85 err = dev_set_allmulti(master, 1); 86 if (err < 0) 87 goto del_unicast; 88 } 89 if (dev->flags & IFF_PROMISC) { 90 err = dev_set_promiscuity(master, 1); 91 if (err < 0) 92 goto clear_allmulti; 93 } 94 95 err = dsa_port_enable(dp, dev->phydev); 96 if (err) 97 goto clear_promisc; 98 99 if (dev->phydev) 100 phy_start(dev->phydev); 101 102 return 0; 103 104 clear_promisc: 105 if (dev->flags & IFF_PROMISC) 106 dev_set_promiscuity(master, -1); 107 clear_allmulti: 108 if (dev->flags & IFF_ALLMULTI) 109 dev_set_allmulti(master, -1); 110 del_unicast: 111 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 112 dev_uc_del(master, dev->dev_addr); 113 out: 114 return err; 115 } 116 117 static int dsa_slave_close(struct net_device *dev) 118 { 119 struct net_device *master = dsa_slave_to_master(dev); 120 struct dsa_port *dp = dsa_slave_to_port(dev); 121 122 if (dev->phydev) 123 phy_stop(dev->phydev); 124 125 dsa_port_disable(dp, dev->phydev); 126 127 dev_mc_unsync(master, dev); 128 dev_uc_unsync(master, dev); 129 if (dev->flags & IFF_ALLMULTI) 130 dev_set_allmulti(master, -1); 131 if (dev->flags & IFF_PROMISC) 132 dev_set_promiscuity(master, -1); 133 134 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 135 dev_uc_del(master, dev->dev_addr); 136 137 return 0; 138 } 139 140 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 141 { 142 struct net_device *master = dsa_slave_to_master(dev); 143 144 if (change & IFF_ALLMULTI) 145 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); 146 if (change & IFF_PROMISC) 147 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); 148 } 149 150 static void dsa_slave_set_rx_mode(struct net_device *dev) 151 { 152 struct net_device *master = dsa_slave_to_master(dev); 153 154 dev_mc_sync(master, dev); 155 dev_uc_sync(master, dev); 156 } 157 158 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 159 { 160 struct net_device *master = dsa_slave_to_master(dev); 161 struct sockaddr *addr = a; 162 int err; 163 164 if (!is_valid_ether_addr(addr->sa_data)) 165 return -EADDRNOTAVAIL; 166 167 if (!(dev->flags & IFF_UP)) 168 goto out; 169 170 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 171 err = dev_uc_add(master, addr->sa_data); 172 if (err < 0) 173 return err; 174 } 175 176 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 177 dev_uc_del(master, dev->dev_addr); 178 179 out: 180 ether_addr_copy(dev->dev_addr, addr->sa_data); 181 182 return 0; 183 } 184 185 struct dsa_slave_dump_ctx { 186 struct net_device *dev; 187 struct sk_buff *skb; 188 struct netlink_callback *cb; 189 int idx; 190 }; 191 192 static int 193 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 194 bool is_static, void *data) 195 { 196 struct dsa_slave_dump_ctx *dump = data; 197 u32 portid = NETLINK_CB(dump->cb->skb).portid; 198 u32 seq = dump->cb->nlh->nlmsg_seq; 199 struct nlmsghdr *nlh; 200 struct ndmsg *ndm; 201 202 if (dump->idx < dump->cb->args[2]) 203 goto skip; 204 205 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 206 sizeof(*ndm), NLM_F_MULTI); 207 if (!nlh) 208 return -EMSGSIZE; 209 210 ndm = nlmsg_data(nlh); 211 ndm->ndm_family = AF_BRIDGE; 212 ndm->ndm_pad1 = 0; 213 ndm->ndm_pad2 = 0; 214 ndm->ndm_flags = NTF_SELF; 215 ndm->ndm_type = 0; 216 ndm->ndm_ifindex = dump->dev->ifindex; 217 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 218 219 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 220 goto nla_put_failure; 221 222 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 223 goto nla_put_failure; 224 225 nlmsg_end(dump->skb, nlh); 226 227 skip: 228 dump->idx++; 229 return 0; 230 231 nla_put_failure: 232 nlmsg_cancel(dump->skb, nlh); 233 return -EMSGSIZE; 234 } 235 236 static int 237 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 238 struct net_device *dev, struct net_device *filter_dev, 239 int *idx) 240 { 241 struct dsa_port *dp = dsa_slave_to_port(dev); 242 struct dsa_slave_dump_ctx dump = { 243 .dev = dev, 244 .skb = skb, 245 .cb = cb, 246 .idx = *idx, 247 }; 248 int err; 249 250 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 251 *idx = dump.idx; 252 253 return err; 254 } 255 256 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 257 { 258 if (!dev->phydev) 259 return -ENODEV; 260 261 return phy_mii_ioctl(dev->phydev, ifr, cmd); 262 } 263 264 static int dsa_slave_port_attr_set(struct net_device *dev, 265 const struct switchdev_attr *attr, 266 struct switchdev_trans *trans) 267 { 268 struct dsa_port *dp = dsa_slave_to_port(dev); 269 int ret; 270 271 switch (attr->id) { 272 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 273 ret = dsa_port_set_state(dp, attr->u.stp_state, trans); 274 break; 275 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 276 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 277 trans); 278 break; 279 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 280 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans); 281 break; 282 default: 283 ret = -EOPNOTSUPP; 284 break; 285 } 286 287 return ret; 288 } 289 290 static int dsa_slave_port_obj_add(struct net_device *dev, 291 const struct switchdev_obj *obj, 292 struct switchdev_trans *trans) 293 { 294 struct dsa_port *dp = dsa_slave_to_port(dev); 295 int err; 296 297 /* For the prepare phase, ensure the full set of changes is feasable in 298 * one go in order to signal a failure properly. If an operation is not 299 * supported, return -EOPNOTSUPP. 300 */ 301 302 switch (obj->id) { 303 case SWITCHDEV_OBJ_ID_PORT_MDB: 304 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans); 305 break; 306 case SWITCHDEV_OBJ_ID_HOST_MDB: 307 /* DSA can directly translate this to a normal MDB add, 308 * but on the CPU port. 309 */ 310 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj), 311 trans); 312 break; 313 case SWITCHDEV_OBJ_ID_PORT_VLAN: 314 err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj), 315 trans); 316 break; 317 default: 318 err = -EOPNOTSUPP; 319 break; 320 } 321 322 return err; 323 } 324 325 static int dsa_slave_port_obj_del(struct net_device *dev, 326 const struct switchdev_obj *obj) 327 { 328 struct dsa_port *dp = dsa_slave_to_port(dev); 329 int err; 330 331 switch (obj->id) { 332 case SWITCHDEV_OBJ_ID_PORT_MDB: 333 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 334 break; 335 case SWITCHDEV_OBJ_ID_HOST_MDB: 336 /* DSA can directly translate this to a normal MDB add, 337 * but on the CPU port. 338 */ 339 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 340 break; 341 case SWITCHDEV_OBJ_ID_PORT_VLAN: 342 err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj)); 343 break; 344 default: 345 err = -EOPNOTSUPP; 346 break; 347 } 348 349 return err; 350 } 351 352 static int dsa_slave_port_attr_get(struct net_device *dev, 353 struct switchdev_attr *attr) 354 { 355 struct dsa_port *dp = dsa_slave_to_port(dev); 356 struct dsa_switch *ds = dp->ds; 357 struct dsa_switch_tree *dst = ds->dst; 358 359 switch (attr->id) { 360 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: 361 attr->u.ppid.id_len = sizeof(dst->index); 362 memcpy(&attr->u.ppid.id, &dst->index, attr->u.ppid.id_len); 363 break; 364 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT: 365 attr->u.brport_flags_support = 0; 366 break; 367 default: 368 return -EOPNOTSUPP; 369 } 370 371 return 0; 372 } 373 374 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 375 struct sk_buff *skb) 376 { 377 #ifdef CONFIG_NET_POLL_CONTROLLER 378 struct dsa_slave_priv *p = netdev_priv(dev); 379 380 if (p->netpoll) 381 netpoll_send_skb(p->netpoll, skb); 382 #else 383 BUG(); 384 #endif 385 return NETDEV_TX_OK; 386 } 387 388 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 389 { 390 struct dsa_slave_priv *p = netdev_priv(dev); 391 struct pcpu_sw_netstats *s; 392 struct sk_buff *nskb; 393 394 s = this_cpu_ptr(p->stats64); 395 u64_stats_update_begin(&s->syncp); 396 s->tx_packets++; 397 s->tx_bytes += skb->len; 398 u64_stats_update_end(&s->syncp); 399 400 /* Transmit function may have to reallocate the original SKB, 401 * in which case it must have freed it. Only free it here on error. 402 */ 403 nskb = p->xmit(skb, dev); 404 if (!nskb) { 405 kfree_skb(skb); 406 return NETDEV_TX_OK; 407 } 408 409 /* SKB for netpoll still need to be mangled with the protocol-specific 410 * tag to be successfully transmitted 411 */ 412 if (unlikely(netpoll_tx_running(dev))) 413 return dsa_slave_netpoll_send_skb(dev, nskb); 414 415 /* Queue the SKB for transmission on the parent interface, but 416 * do not modify its EtherType 417 */ 418 nskb->dev = dsa_slave_to_master(dev); 419 dev_queue_xmit(nskb); 420 421 return NETDEV_TX_OK; 422 } 423 424 /* ethtool operations *******************************************************/ 425 426 static void dsa_slave_get_drvinfo(struct net_device *dev, 427 struct ethtool_drvinfo *drvinfo) 428 { 429 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 430 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 431 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 432 } 433 434 static int dsa_slave_get_regs_len(struct net_device *dev) 435 { 436 struct dsa_port *dp = dsa_slave_to_port(dev); 437 struct dsa_switch *ds = dp->ds; 438 439 if (ds->ops->get_regs_len) 440 return ds->ops->get_regs_len(ds, dp->index); 441 442 return -EOPNOTSUPP; 443 } 444 445 static void 446 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 447 { 448 struct dsa_port *dp = dsa_slave_to_port(dev); 449 struct dsa_switch *ds = dp->ds; 450 451 if (ds->ops->get_regs) 452 ds->ops->get_regs(ds, dp->index, regs, _p); 453 } 454 455 static u32 dsa_slave_get_link(struct net_device *dev) 456 { 457 if (!dev->phydev) 458 return -ENODEV; 459 460 genphy_update_link(dev->phydev); 461 462 return dev->phydev->link; 463 } 464 465 static int dsa_slave_get_eeprom_len(struct net_device *dev) 466 { 467 struct dsa_port *dp = dsa_slave_to_port(dev); 468 struct dsa_switch *ds = dp->ds; 469 470 if (ds->cd && ds->cd->eeprom_len) 471 return ds->cd->eeprom_len; 472 473 if (ds->ops->get_eeprom_len) 474 return ds->ops->get_eeprom_len(ds); 475 476 return 0; 477 } 478 479 static int dsa_slave_get_eeprom(struct net_device *dev, 480 struct ethtool_eeprom *eeprom, u8 *data) 481 { 482 struct dsa_port *dp = dsa_slave_to_port(dev); 483 struct dsa_switch *ds = dp->ds; 484 485 if (ds->ops->get_eeprom) 486 return ds->ops->get_eeprom(ds, eeprom, data); 487 488 return -EOPNOTSUPP; 489 } 490 491 static int dsa_slave_set_eeprom(struct net_device *dev, 492 struct ethtool_eeprom *eeprom, u8 *data) 493 { 494 struct dsa_port *dp = dsa_slave_to_port(dev); 495 struct dsa_switch *ds = dp->ds; 496 497 if (ds->ops->set_eeprom) 498 return ds->ops->set_eeprom(ds, eeprom, data); 499 500 return -EOPNOTSUPP; 501 } 502 503 static void dsa_slave_get_strings(struct net_device *dev, 504 uint32_t stringset, uint8_t *data) 505 { 506 struct dsa_port *dp = dsa_slave_to_port(dev); 507 struct dsa_switch *ds = dp->ds; 508 509 if (stringset == ETH_SS_STATS) { 510 int len = ETH_GSTRING_LEN; 511 512 strncpy(data, "tx_packets", len); 513 strncpy(data + len, "tx_bytes", len); 514 strncpy(data + 2 * len, "rx_packets", len); 515 strncpy(data + 3 * len, "rx_bytes", len); 516 if (ds->ops->get_strings) 517 ds->ops->get_strings(ds, dp->index, data + 4 * len); 518 } 519 } 520 521 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 522 struct ethtool_stats *stats, 523 uint64_t *data) 524 { 525 struct dsa_port *dp = dsa_slave_to_port(dev); 526 struct dsa_slave_priv *p = netdev_priv(dev); 527 struct dsa_switch *ds = dp->ds; 528 struct pcpu_sw_netstats *s; 529 unsigned int start; 530 int i; 531 532 for_each_possible_cpu(i) { 533 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 534 535 s = per_cpu_ptr(p->stats64, i); 536 do { 537 start = u64_stats_fetch_begin_irq(&s->syncp); 538 tx_packets = s->tx_packets; 539 tx_bytes = s->tx_bytes; 540 rx_packets = s->rx_packets; 541 rx_bytes = s->rx_bytes; 542 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 543 data[0] += tx_packets; 544 data[1] += tx_bytes; 545 data[2] += rx_packets; 546 data[3] += rx_bytes; 547 } 548 if (ds->ops->get_ethtool_stats) 549 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 550 } 551 552 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 553 { 554 struct dsa_port *dp = dsa_slave_to_port(dev); 555 struct dsa_switch *ds = dp->ds; 556 557 if (sset == ETH_SS_STATS) { 558 int count; 559 560 count = 4; 561 if (ds->ops->get_sset_count) 562 count += ds->ops->get_sset_count(ds); 563 564 return count; 565 } 566 567 return -EOPNOTSUPP; 568 } 569 570 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 571 { 572 struct dsa_port *dp = dsa_slave_to_port(dev); 573 struct dsa_switch *ds = dp->ds; 574 575 if (ds->ops->get_wol) 576 ds->ops->get_wol(ds, dp->index, w); 577 } 578 579 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 580 { 581 struct dsa_port *dp = dsa_slave_to_port(dev); 582 struct dsa_switch *ds = dp->ds; 583 int ret = -EOPNOTSUPP; 584 585 if (ds->ops->set_wol) 586 ret = ds->ops->set_wol(ds, dp->index, w); 587 588 return ret; 589 } 590 591 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 592 { 593 struct dsa_port *dp = dsa_slave_to_port(dev); 594 struct dsa_switch *ds = dp->ds; 595 int ret; 596 597 /* Port's PHY and MAC both need to be EEE capable */ 598 if (!dev->phydev) 599 return -ENODEV; 600 601 if (!ds->ops->set_mac_eee) 602 return -EOPNOTSUPP; 603 604 ret = ds->ops->set_mac_eee(ds, dp->index, e); 605 if (ret) 606 return ret; 607 608 if (e->eee_enabled) { 609 ret = phy_init_eee(dev->phydev, 0); 610 if (ret) 611 return ret; 612 } 613 614 return phy_ethtool_set_eee(dev->phydev, e); 615 } 616 617 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 618 { 619 struct dsa_port *dp = dsa_slave_to_port(dev); 620 struct dsa_switch *ds = dp->ds; 621 int ret; 622 623 /* Port's PHY and MAC both need to be EEE capable */ 624 if (!dev->phydev) 625 return -ENODEV; 626 627 if (!ds->ops->get_mac_eee) 628 return -EOPNOTSUPP; 629 630 ret = ds->ops->get_mac_eee(ds, dp->index, e); 631 if (ret) 632 return ret; 633 634 return phy_ethtool_get_eee(dev->phydev, e); 635 } 636 637 #ifdef CONFIG_NET_POLL_CONTROLLER 638 static int dsa_slave_netpoll_setup(struct net_device *dev, 639 struct netpoll_info *ni) 640 { 641 struct net_device *master = dsa_slave_to_master(dev); 642 struct dsa_slave_priv *p = netdev_priv(dev); 643 struct netpoll *netpoll; 644 int err = 0; 645 646 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 647 if (!netpoll) 648 return -ENOMEM; 649 650 err = __netpoll_setup(netpoll, master); 651 if (err) { 652 kfree(netpoll); 653 goto out; 654 } 655 656 p->netpoll = netpoll; 657 out: 658 return err; 659 } 660 661 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 662 { 663 struct dsa_slave_priv *p = netdev_priv(dev); 664 struct netpoll *netpoll = p->netpoll; 665 666 if (!netpoll) 667 return; 668 669 p->netpoll = NULL; 670 671 __netpoll_free_async(netpoll); 672 } 673 674 static void dsa_slave_poll_controller(struct net_device *dev) 675 { 676 } 677 #endif 678 679 static int dsa_slave_get_phys_port_name(struct net_device *dev, 680 char *name, size_t len) 681 { 682 struct dsa_port *dp = dsa_slave_to_port(dev); 683 684 if (snprintf(name, len, "p%d", dp->index) >= len) 685 return -EINVAL; 686 687 return 0; 688 } 689 690 static struct dsa_mall_tc_entry * 691 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 692 { 693 struct dsa_slave_priv *p = netdev_priv(dev); 694 struct dsa_mall_tc_entry *mall_tc_entry; 695 696 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 697 if (mall_tc_entry->cookie == cookie) 698 return mall_tc_entry; 699 700 return NULL; 701 } 702 703 static int dsa_slave_add_cls_matchall(struct net_device *dev, 704 struct tc_cls_matchall_offload *cls, 705 bool ingress) 706 { 707 struct dsa_port *dp = dsa_slave_to_port(dev); 708 struct dsa_slave_priv *p = netdev_priv(dev); 709 struct dsa_mall_tc_entry *mall_tc_entry; 710 __be16 protocol = cls->common.protocol; 711 struct dsa_switch *ds = dp->ds; 712 struct net_device *to_dev; 713 const struct tc_action *a; 714 struct dsa_port *to_dp; 715 int err = -EOPNOTSUPP; 716 LIST_HEAD(actions); 717 718 if (!ds->ops->port_mirror_add) 719 return err; 720 721 if (!tcf_exts_has_one_action(cls->exts)) 722 return err; 723 724 tcf_exts_to_list(cls->exts, &actions); 725 a = list_first_entry(&actions, struct tc_action, list); 726 727 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) { 728 struct dsa_mall_mirror_tc_entry *mirror; 729 730 to_dev = tcf_mirred_dev(a); 731 if (!to_dev) 732 return -EINVAL; 733 734 if (!dsa_slave_dev_check(to_dev)) 735 return -EOPNOTSUPP; 736 737 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 738 if (!mall_tc_entry) 739 return -ENOMEM; 740 741 mall_tc_entry->cookie = cls->cookie; 742 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 743 mirror = &mall_tc_entry->mirror; 744 745 to_dp = dsa_slave_to_port(to_dev); 746 747 mirror->to_local_port = to_dp->index; 748 mirror->ingress = ingress; 749 750 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); 751 if (err) { 752 kfree(mall_tc_entry); 753 return err; 754 } 755 756 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 757 } 758 759 return 0; 760 } 761 762 static void dsa_slave_del_cls_matchall(struct net_device *dev, 763 struct tc_cls_matchall_offload *cls) 764 { 765 struct dsa_port *dp = dsa_slave_to_port(dev); 766 struct dsa_mall_tc_entry *mall_tc_entry; 767 struct dsa_switch *ds = dp->ds; 768 769 if (!ds->ops->port_mirror_del) 770 return; 771 772 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 773 if (!mall_tc_entry) 774 return; 775 776 list_del(&mall_tc_entry->list); 777 778 switch (mall_tc_entry->type) { 779 case DSA_PORT_MALL_MIRROR: 780 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror); 781 break; 782 default: 783 WARN_ON(1); 784 } 785 786 kfree(mall_tc_entry); 787 } 788 789 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 790 struct tc_cls_matchall_offload *cls, 791 bool ingress) 792 { 793 if (cls->common.chain_index) 794 return -EOPNOTSUPP; 795 796 switch (cls->command) { 797 case TC_CLSMATCHALL_REPLACE: 798 return dsa_slave_add_cls_matchall(dev, cls, ingress); 799 case TC_CLSMATCHALL_DESTROY: 800 dsa_slave_del_cls_matchall(dev, cls); 801 return 0; 802 default: 803 return -EOPNOTSUPP; 804 } 805 } 806 807 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 808 void *cb_priv, bool ingress) 809 { 810 struct net_device *dev = cb_priv; 811 812 if (!tc_can_offload(dev)) 813 return -EOPNOTSUPP; 814 815 switch (type) { 816 case TC_SETUP_CLSMATCHALL: 817 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 818 default: 819 return -EOPNOTSUPP; 820 } 821 } 822 823 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 824 void *type_data, void *cb_priv) 825 { 826 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 827 } 828 829 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 830 void *type_data, void *cb_priv) 831 { 832 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 833 } 834 835 static int dsa_slave_setup_tc_block(struct net_device *dev, 836 struct tc_block_offload *f) 837 { 838 tc_setup_cb_t *cb; 839 840 if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 841 cb = dsa_slave_setup_tc_block_cb_ig; 842 else if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 843 cb = dsa_slave_setup_tc_block_cb_eg; 844 else 845 return -EOPNOTSUPP; 846 847 switch (f->command) { 848 case TC_BLOCK_BIND: 849 return tcf_block_cb_register(f->block, cb, dev, dev); 850 case TC_BLOCK_UNBIND: 851 tcf_block_cb_unregister(f->block, cb, dev); 852 return 0; 853 default: 854 return -EOPNOTSUPP; 855 } 856 } 857 858 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 859 void *type_data) 860 { 861 switch (type) { 862 case TC_SETUP_BLOCK: 863 return dsa_slave_setup_tc_block(dev, type_data); 864 default: 865 return -EOPNOTSUPP; 866 } 867 } 868 869 static void dsa_slave_get_stats64(struct net_device *dev, 870 struct rtnl_link_stats64 *stats) 871 { 872 struct dsa_slave_priv *p = netdev_priv(dev); 873 struct pcpu_sw_netstats *s; 874 unsigned int start; 875 int i; 876 877 netdev_stats_to_stats64(stats, &dev->stats); 878 for_each_possible_cpu(i) { 879 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 880 881 s = per_cpu_ptr(p->stats64, i); 882 do { 883 start = u64_stats_fetch_begin_irq(&s->syncp); 884 tx_packets = s->tx_packets; 885 tx_bytes = s->tx_bytes; 886 rx_packets = s->rx_packets; 887 rx_bytes = s->rx_bytes; 888 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 889 890 stats->tx_packets += tx_packets; 891 stats->tx_bytes += tx_bytes; 892 stats->rx_packets += rx_packets; 893 stats->rx_bytes += rx_bytes; 894 } 895 } 896 897 static int dsa_slave_get_rxnfc(struct net_device *dev, 898 struct ethtool_rxnfc *nfc, u32 *rule_locs) 899 { 900 struct dsa_port *dp = dsa_slave_to_port(dev); 901 struct dsa_switch *ds = dp->ds; 902 903 if (!ds->ops->get_rxnfc) 904 return -EOPNOTSUPP; 905 906 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 907 } 908 909 static int dsa_slave_set_rxnfc(struct net_device *dev, 910 struct ethtool_rxnfc *nfc) 911 { 912 struct dsa_port *dp = dsa_slave_to_port(dev); 913 struct dsa_switch *ds = dp->ds; 914 915 if (!ds->ops->set_rxnfc) 916 return -EOPNOTSUPP; 917 918 return ds->ops->set_rxnfc(ds, dp->index, nfc); 919 } 920 921 static const struct ethtool_ops dsa_slave_ethtool_ops = { 922 .get_drvinfo = dsa_slave_get_drvinfo, 923 .get_regs_len = dsa_slave_get_regs_len, 924 .get_regs = dsa_slave_get_regs, 925 .nway_reset = phy_ethtool_nway_reset, 926 .get_link = dsa_slave_get_link, 927 .get_eeprom_len = dsa_slave_get_eeprom_len, 928 .get_eeprom = dsa_slave_get_eeprom, 929 .set_eeprom = dsa_slave_set_eeprom, 930 .get_strings = dsa_slave_get_strings, 931 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 932 .get_sset_count = dsa_slave_get_sset_count, 933 .set_wol = dsa_slave_set_wol, 934 .get_wol = dsa_slave_get_wol, 935 .set_eee = dsa_slave_set_eee, 936 .get_eee = dsa_slave_get_eee, 937 .get_link_ksettings = phy_ethtool_get_link_ksettings, 938 .set_link_ksettings = phy_ethtool_set_link_ksettings, 939 .get_rxnfc = dsa_slave_get_rxnfc, 940 .set_rxnfc = dsa_slave_set_rxnfc, 941 }; 942 943 /* legacy way, bypassing the bridge *****************************************/ 944 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 945 struct net_device *dev, 946 const unsigned char *addr, u16 vid, 947 u16 flags) 948 { 949 struct dsa_port *dp = dsa_slave_to_port(dev); 950 951 return dsa_port_fdb_add(dp, addr, vid); 952 } 953 954 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 955 struct net_device *dev, 956 const unsigned char *addr, u16 vid) 957 { 958 struct dsa_port *dp = dsa_slave_to_port(dev); 959 960 return dsa_port_fdb_del(dp, addr, vid); 961 } 962 963 static const struct net_device_ops dsa_slave_netdev_ops = { 964 .ndo_open = dsa_slave_open, 965 .ndo_stop = dsa_slave_close, 966 .ndo_start_xmit = dsa_slave_xmit, 967 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 968 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 969 .ndo_set_mac_address = dsa_slave_set_mac_address, 970 .ndo_fdb_add = dsa_legacy_fdb_add, 971 .ndo_fdb_del = dsa_legacy_fdb_del, 972 .ndo_fdb_dump = dsa_slave_fdb_dump, 973 .ndo_do_ioctl = dsa_slave_ioctl, 974 .ndo_get_iflink = dsa_slave_get_iflink, 975 #ifdef CONFIG_NET_POLL_CONTROLLER 976 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 977 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 978 .ndo_poll_controller = dsa_slave_poll_controller, 979 #endif 980 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 981 .ndo_setup_tc = dsa_slave_setup_tc, 982 .ndo_get_stats64 = dsa_slave_get_stats64, 983 }; 984 985 static const struct switchdev_ops dsa_slave_switchdev_ops = { 986 .switchdev_port_attr_get = dsa_slave_port_attr_get, 987 .switchdev_port_attr_set = dsa_slave_port_attr_set, 988 .switchdev_port_obj_add = dsa_slave_port_obj_add, 989 .switchdev_port_obj_del = dsa_slave_port_obj_del, 990 }; 991 992 static struct device_type dsa_type = { 993 .name = "dsa", 994 }; 995 996 static void dsa_slave_adjust_link(struct net_device *dev) 997 { 998 struct dsa_port *dp = dsa_slave_to_port(dev); 999 struct dsa_slave_priv *p = netdev_priv(dev); 1000 struct dsa_switch *ds = dp->ds; 1001 unsigned int status_changed = 0; 1002 1003 if (p->old_link != dev->phydev->link) { 1004 status_changed = 1; 1005 p->old_link = dev->phydev->link; 1006 } 1007 1008 if (p->old_duplex != dev->phydev->duplex) { 1009 status_changed = 1; 1010 p->old_duplex = dev->phydev->duplex; 1011 } 1012 1013 if (p->old_pause != dev->phydev->pause) { 1014 status_changed = 1; 1015 p->old_pause = dev->phydev->pause; 1016 } 1017 1018 if (ds->ops->adjust_link && status_changed) 1019 ds->ops->adjust_link(ds, dp->index, dev->phydev); 1020 1021 if (status_changed) 1022 phy_print_status(dev->phydev); 1023 } 1024 1025 static int dsa_slave_fixed_link_update(struct net_device *dev, 1026 struct fixed_phy_status *status) 1027 { 1028 struct dsa_switch *ds; 1029 struct dsa_port *dp; 1030 1031 if (dev) { 1032 dp = dsa_slave_to_port(dev); 1033 ds = dp->ds; 1034 if (ds->ops->fixed_link_update) 1035 ds->ops->fixed_link_update(ds, dp->index, status); 1036 } 1037 1038 return 0; 1039 } 1040 1041 /* slave device setup *******************************************************/ 1042 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) 1043 { 1044 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1045 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1046 struct dsa_switch *ds = dp->ds; 1047 1048 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 1049 if (!slave_dev->phydev) { 1050 netdev_err(slave_dev, "no phy at %d\n", addr); 1051 return -ENODEV; 1052 } 1053 1054 /* Use already configured phy mode */ 1055 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1056 p->phy_interface = slave_dev->phydev->interface; 1057 1058 return phy_connect_direct(slave_dev, slave_dev->phydev, 1059 dsa_slave_adjust_link, p->phy_interface); 1060 } 1061 1062 static int dsa_slave_phy_setup(struct net_device *slave_dev) 1063 { 1064 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1065 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1066 struct device_node *port_dn = dp->dn; 1067 struct dsa_switch *ds = dp->ds; 1068 struct device_node *phy_dn; 1069 bool phy_is_fixed = false; 1070 u32 phy_flags = 0; 1071 int mode, ret; 1072 1073 mode = of_get_phy_mode(port_dn); 1074 if (mode < 0) 1075 mode = PHY_INTERFACE_MODE_NA; 1076 p->phy_interface = mode; 1077 1078 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1079 if (!phy_dn && of_phy_is_fixed_link(port_dn)) { 1080 /* In the case of a fixed PHY, the DT node associated 1081 * to the fixed PHY is the Port DT node 1082 */ 1083 ret = of_phy_register_fixed_link(port_dn); 1084 if (ret) { 1085 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1086 return ret; 1087 } 1088 phy_is_fixed = true; 1089 phy_dn = of_node_get(port_dn); 1090 } 1091 1092 if (ds->ops->get_phy_flags) 1093 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 1094 1095 if (phy_dn) { 1096 slave_dev->phydev = of_phy_connect(slave_dev, phy_dn, 1097 dsa_slave_adjust_link, 1098 phy_flags, 1099 p->phy_interface); 1100 of_node_put(phy_dn); 1101 } 1102 1103 if (slave_dev->phydev && phy_is_fixed) 1104 fixed_phy_set_link_update(slave_dev->phydev, 1105 dsa_slave_fixed_link_update); 1106 1107 /* We could not connect to a designated PHY, so use the switch internal 1108 * MDIO bus instead 1109 */ 1110 if (!slave_dev->phydev) { 1111 ret = dsa_slave_phy_connect(slave_dev, dp->index); 1112 if (ret) { 1113 netdev_err(slave_dev, "failed to connect to port %d: %d\n", 1114 dp->index, ret); 1115 if (phy_is_fixed) 1116 of_phy_deregister_fixed_link(port_dn); 1117 return ret; 1118 } 1119 } 1120 1121 phy_attached_info(slave_dev->phydev); 1122 1123 return 0; 1124 } 1125 1126 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1127 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1128 struct netdev_queue *txq, 1129 void *_unused) 1130 { 1131 lockdep_set_class(&txq->_xmit_lock, 1132 &dsa_slave_netdev_xmit_lock_key); 1133 } 1134 1135 int dsa_slave_suspend(struct net_device *slave_dev) 1136 { 1137 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1138 1139 netif_device_detach(slave_dev); 1140 1141 if (slave_dev->phydev) { 1142 phy_stop(slave_dev->phydev); 1143 p->old_pause = -1; 1144 p->old_link = -1; 1145 p->old_duplex = -1; 1146 phy_suspend(slave_dev->phydev); 1147 } 1148 1149 return 0; 1150 } 1151 1152 int dsa_slave_resume(struct net_device *slave_dev) 1153 { 1154 netif_device_attach(slave_dev); 1155 1156 if (slave_dev->phydev) { 1157 phy_resume(slave_dev->phydev); 1158 phy_start(slave_dev->phydev); 1159 } 1160 1161 return 0; 1162 } 1163 1164 static void dsa_slave_notify(struct net_device *dev, unsigned long val) 1165 { 1166 struct net_device *master = dsa_slave_to_master(dev); 1167 struct dsa_port *dp = dsa_slave_to_port(dev); 1168 struct dsa_notifier_register_info rinfo = { 1169 .switch_number = dp->ds->index, 1170 .port_number = dp->index, 1171 .master = master, 1172 .info.dev = dev, 1173 }; 1174 1175 call_dsa_notifiers(val, dev, &rinfo.info); 1176 } 1177 1178 int dsa_slave_create(struct dsa_port *port) 1179 { 1180 const struct dsa_port *cpu_dp = port->cpu_dp; 1181 struct net_device *master = cpu_dp->master; 1182 struct dsa_switch *ds = port->ds; 1183 const char *name = port->name; 1184 struct net_device *slave_dev; 1185 struct dsa_slave_priv *p; 1186 int ret; 1187 1188 if (!ds->num_tx_queues) 1189 ds->num_tx_queues = 1; 1190 1191 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 1192 NET_NAME_UNKNOWN, ether_setup, 1193 ds->num_tx_queues, 1); 1194 if (slave_dev == NULL) 1195 return -ENOMEM; 1196 1197 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1198 slave_dev->hw_features |= NETIF_F_HW_TC; 1199 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1200 eth_hw_addr_inherit(slave_dev, master); 1201 slave_dev->priv_flags |= IFF_NO_QUEUE; 1202 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1203 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1204 slave_dev->min_mtu = 0; 1205 slave_dev->max_mtu = ETH_MAX_MTU; 1206 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1207 1208 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1209 NULL); 1210 1211 SET_NETDEV_DEV(slave_dev, port->ds->dev); 1212 slave_dev->dev.of_node = port->dn; 1213 slave_dev->vlan_features = master->vlan_features; 1214 1215 p = netdev_priv(slave_dev); 1216 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1217 if (!p->stats64) { 1218 free_netdev(slave_dev); 1219 return -ENOMEM; 1220 } 1221 p->dp = port; 1222 INIT_LIST_HEAD(&p->mall_tc_list); 1223 p->xmit = cpu_dp->tag_ops->xmit; 1224 1225 p->old_pause = -1; 1226 p->old_link = -1; 1227 p->old_duplex = -1; 1228 1229 port->slave = slave_dev; 1230 1231 netif_carrier_off(slave_dev); 1232 1233 ret = dsa_slave_phy_setup(slave_dev); 1234 if (ret) { 1235 netdev_err(master, "error %d setting up slave phy\n", ret); 1236 goto out_free; 1237 } 1238 1239 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER); 1240 1241 ret = register_netdev(slave_dev); 1242 if (ret) { 1243 netdev_err(master, "error %d registering interface %s\n", 1244 ret, slave_dev->name); 1245 goto out_phy; 1246 } 1247 1248 return 0; 1249 1250 out_phy: 1251 phy_disconnect(slave_dev->phydev); 1252 if (of_phy_is_fixed_link(port->dn)) 1253 of_phy_deregister_fixed_link(port->dn); 1254 out_free: 1255 free_percpu(p->stats64); 1256 free_netdev(slave_dev); 1257 port->slave = NULL; 1258 return ret; 1259 } 1260 1261 void dsa_slave_destroy(struct net_device *slave_dev) 1262 { 1263 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1264 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1265 struct device_node *port_dn = dp->dn; 1266 1267 netif_carrier_off(slave_dev); 1268 if (slave_dev->phydev) { 1269 phy_disconnect(slave_dev->phydev); 1270 1271 if (of_phy_is_fixed_link(port_dn)) 1272 of_phy_deregister_fixed_link(port_dn); 1273 } 1274 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER); 1275 unregister_netdev(slave_dev); 1276 free_percpu(p->stats64); 1277 free_netdev(slave_dev); 1278 } 1279 1280 static bool dsa_slave_dev_check(struct net_device *dev) 1281 { 1282 return dev->netdev_ops == &dsa_slave_netdev_ops; 1283 } 1284 1285 static int dsa_slave_changeupper(struct net_device *dev, 1286 struct netdev_notifier_changeupper_info *info) 1287 { 1288 struct dsa_port *dp = dsa_slave_to_port(dev); 1289 int err = NOTIFY_DONE; 1290 1291 if (netif_is_bridge_master(info->upper_dev)) { 1292 if (info->linking) { 1293 err = dsa_port_bridge_join(dp, info->upper_dev); 1294 err = notifier_from_errno(err); 1295 } else { 1296 dsa_port_bridge_leave(dp, info->upper_dev); 1297 err = NOTIFY_OK; 1298 } 1299 } 1300 1301 return err; 1302 } 1303 1304 static int dsa_slave_netdevice_event(struct notifier_block *nb, 1305 unsigned long event, void *ptr) 1306 { 1307 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1308 1309 if (!dsa_slave_dev_check(dev)) 1310 return NOTIFY_DONE; 1311 1312 if (event == NETDEV_CHANGEUPPER) 1313 return dsa_slave_changeupper(dev, ptr); 1314 1315 return NOTIFY_DONE; 1316 } 1317 1318 struct dsa_switchdev_event_work { 1319 struct work_struct work; 1320 struct switchdev_notifier_fdb_info fdb_info; 1321 struct net_device *dev; 1322 unsigned long event; 1323 }; 1324 1325 static void dsa_slave_switchdev_event_work(struct work_struct *work) 1326 { 1327 struct dsa_switchdev_event_work *switchdev_work = 1328 container_of(work, struct dsa_switchdev_event_work, work); 1329 struct net_device *dev = switchdev_work->dev; 1330 struct switchdev_notifier_fdb_info *fdb_info; 1331 struct dsa_port *dp = dsa_slave_to_port(dev); 1332 int err; 1333 1334 rtnl_lock(); 1335 switch (switchdev_work->event) { 1336 case SWITCHDEV_FDB_ADD_TO_DEVICE: 1337 fdb_info = &switchdev_work->fdb_info; 1338 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid); 1339 if (err) { 1340 netdev_dbg(dev, "fdb add failed err=%d\n", err); 1341 break; 1342 } 1343 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev, 1344 &fdb_info->info); 1345 break; 1346 1347 case SWITCHDEV_FDB_DEL_TO_DEVICE: 1348 fdb_info = &switchdev_work->fdb_info; 1349 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid); 1350 if (err) { 1351 netdev_dbg(dev, "fdb del failed err=%d\n", err); 1352 dev_close(dev); 1353 } 1354 break; 1355 } 1356 rtnl_unlock(); 1357 1358 kfree(switchdev_work->fdb_info.addr); 1359 kfree(switchdev_work); 1360 dev_put(dev); 1361 } 1362 1363 static int 1364 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work * 1365 switchdev_work, 1366 const struct switchdev_notifier_fdb_info * 1367 fdb_info) 1368 { 1369 memcpy(&switchdev_work->fdb_info, fdb_info, 1370 sizeof(switchdev_work->fdb_info)); 1371 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC); 1372 if (!switchdev_work->fdb_info.addr) 1373 return -ENOMEM; 1374 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr, 1375 fdb_info->addr); 1376 return 0; 1377 } 1378 1379 /* Called under rcu_read_lock() */ 1380 static int dsa_slave_switchdev_event(struct notifier_block *unused, 1381 unsigned long event, void *ptr) 1382 { 1383 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 1384 struct dsa_switchdev_event_work *switchdev_work; 1385 1386 if (!dsa_slave_dev_check(dev)) 1387 return NOTIFY_DONE; 1388 1389 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 1390 if (!switchdev_work) 1391 return NOTIFY_BAD; 1392 1393 INIT_WORK(&switchdev_work->work, 1394 dsa_slave_switchdev_event_work); 1395 switchdev_work->dev = dev; 1396 switchdev_work->event = event; 1397 1398 switch (event) { 1399 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */ 1400 case SWITCHDEV_FDB_DEL_TO_DEVICE: 1401 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, 1402 ptr)) 1403 goto err_fdb_work_init; 1404 dev_hold(dev); 1405 break; 1406 default: 1407 kfree(switchdev_work); 1408 return NOTIFY_DONE; 1409 } 1410 1411 dsa_schedule_work(&switchdev_work->work); 1412 return NOTIFY_OK; 1413 1414 err_fdb_work_init: 1415 kfree(switchdev_work); 1416 return NOTIFY_BAD; 1417 } 1418 1419 static struct notifier_block dsa_slave_nb __read_mostly = { 1420 .notifier_call = dsa_slave_netdevice_event, 1421 }; 1422 1423 static struct notifier_block dsa_slave_switchdev_notifier = { 1424 .notifier_call = dsa_slave_switchdev_event, 1425 }; 1426 1427 int dsa_slave_register_notifier(void) 1428 { 1429 int err; 1430 1431 err = register_netdevice_notifier(&dsa_slave_nb); 1432 if (err) 1433 return err; 1434 1435 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 1436 if (err) 1437 goto err_switchdev_nb; 1438 1439 return 0; 1440 1441 err_switchdev_nb: 1442 unregister_netdevice_notifier(&dsa_slave_nb); 1443 return err; 1444 } 1445 1446 void dsa_slave_unregister_notifier(void) 1447 { 1448 int err; 1449 1450 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 1451 if (err) 1452 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 1453 1454 err = unregister_netdevice_notifier(&dsa_slave_nb); 1455 if (err) 1456 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 1457 } 1458