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 <linux/list.h> 20 #include <net/rtnetlink.h> 21 #include <net/pkt_cls.h> 22 #include <net/tc_act/tc_mirred.h> 23 #include <linux/if_bridge.h> 24 #include <linux/netpoll.h> 25 26 #include "dsa_priv.h" 27 28 static bool dsa_slave_dev_check(struct net_device *dev); 29 30 /* slave mii_bus handling ***************************************************/ 31 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 32 { 33 struct dsa_switch *ds = bus->priv; 34 35 if (ds->phys_mii_mask & (1 << addr)) 36 return ds->ops->phy_read(ds, addr, reg); 37 38 return 0xffff; 39 } 40 41 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 42 { 43 struct dsa_switch *ds = bus->priv; 44 45 if (ds->phys_mii_mask & (1 << addr)) 46 return ds->ops->phy_write(ds, addr, reg, val); 47 48 return 0; 49 } 50 51 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 52 { 53 ds->slave_mii_bus->priv = (void *)ds; 54 ds->slave_mii_bus->name = "dsa slave smi"; 55 ds->slave_mii_bus->read = dsa_slave_phy_read; 56 ds->slave_mii_bus->write = dsa_slave_phy_write; 57 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 58 ds->dst->index, ds->index); 59 ds->slave_mii_bus->parent = ds->dev; 60 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 61 } 62 63 64 /* slave device handling ****************************************************/ 65 static int dsa_slave_get_iflink(const struct net_device *dev) 66 { 67 return dsa_slave_to_master(dev)->ifindex; 68 } 69 70 static int dsa_slave_open(struct net_device *dev) 71 { 72 struct net_device *master = dsa_slave_to_master(dev); 73 struct dsa_port *dp = dsa_slave_to_port(dev); 74 int err; 75 76 if (!(master->flags & IFF_UP)) 77 return -ENETDOWN; 78 79 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 80 err = dev_uc_add(master, dev->dev_addr); 81 if (err < 0) 82 goto out; 83 } 84 85 if (dev->flags & IFF_ALLMULTI) { 86 err = dev_set_allmulti(master, 1); 87 if (err < 0) 88 goto del_unicast; 89 } 90 if (dev->flags & IFF_PROMISC) { 91 err = dev_set_promiscuity(master, 1); 92 if (err < 0) 93 goto clear_allmulti; 94 } 95 96 err = dsa_port_enable(dp, dev->phydev); 97 if (err) 98 goto clear_promisc; 99 100 if (dev->phydev) 101 phy_start(dev->phydev); 102 103 return 0; 104 105 clear_promisc: 106 if (dev->flags & IFF_PROMISC) 107 dev_set_promiscuity(master, -1); 108 clear_allmulti: 109 if (dev->flags & IFF_ALLMULTI) 110 dev_set_allmulti(master, -1); 111 del_unicast: 112 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 113 dev_uc_del(master, dev->dev_addr); 114 out: 115 return err; 116 } 117 118 static int dsa_slave_close(struct net_device *dev) 119 { 120 struct net_device *master = dsa_slave_to_master(dev); 121 struct dsa_port *dp = dsa_slave_to_port(dev); 122 123 if (dev->phydev) 124 phy_stop(dev->phydev); 125 126 dsa_port_disable(dp, dev->phydev); 127 128 dev_mc_unsync(master, dev); 129 dev_uc_unsync(master, dev); 130 if (dev->flags & IFF_ALLMULTI) 131 dev_set_allmulti(master, -1); 132 if (dev->flags & IFF_PROMISC) 133 dev_set_promiscuity(master, -1); 134 135 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 136 dev_uc_del(master, dev->dev_addr); 137 138 return 0; 139 } 140 141 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 142 { 143 struct net_device *master = dsa_slave_to_master(dev); 144 145 if (change & IFF_ALLMULTI) 146 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); 147 if (change & IFF_PROMISC) 148 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); 149 } 150 151 static void dsa_slave_set_rx_mode(struct net_device *dev) 152 { 153 struct net_device *master = dsa_slave_to_master(dev); 154 155 dev_mc_sync(master, dev); 156 dev_uc_sync(master, dev); 157 } 158 159 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 160 { 161 struct net_device *master = dsa_slave_to_master(dev); 162 struct sockaddr *addr = a; 163 int err; 164 165 if (!is_valid_ether_addr(addr->sa_data)) 166 return -EADDRNOTAVAIL; 167 168 if (!(dev->flags & IFF_UP)) 169 goto out; 170 171 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 172 err = dev_uc_add(master, addr->sa_data); 173 if (err < 0) 174 return err; 175 } 176 177 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 178 dev_uc_del(master, dev->dev_addr); 179 180 out: 181 ether_addr_copy(dev->dev_addr, addr->sa_data); 182 183 return 0; 184 } 185 186 struct dsa_slave_dump_ctx { 187 struct net_device *dev; 188 struct sk_buff *skb; 189 struct netlink_callback *cb; 190 int idx; 191 }; 192 193 static int 194 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 195 bool is_static, void *data) 196 { 197 struct dsa_slave_dump_ctx *dump = data; 198 u32 portid = NETLINK_CB(dump->cb->skb).portid; 199 u32 seq = dump->cb->nlh->nlmsg_seq; 200 struct nlmsghdr *nlh; 201 struct ndmsg *ndm; 202 203 if (dump->idx < dump->cb->args[2]) 204 goto skip; 205 206 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 207 sizeof(*ndm), NLM_F_MULTI); 208 if (!nlh) 209 return -EMSGSIZE; 210 211 ndm = nlmsg_data(nlh); 212 ndm->ndm_family = AF_BRIDGE; 213 ndm->ndm_pad1 = 0; 214 ndm->ndm_pad2 = 0; 215 ndm->ndm_flags = NTF_SELF; 216 ndm->ndm_type = 0; 217 ndm->ndm_ifindex = dump->dev->ifindex; 218 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 219 220 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 221 goto nla_put_failure; 222 223 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 224 goto nla_put_failure; 225 226 nlmsg_end(dump->skb, nlh); 227 228 skip: 229 dump->idx++; 230 return 0; 231 232 nla_put_failure: 233 nlmsg_cancel(dump->skb, nlh); 234 return -EMSGSIZE; 235 } 236 237 static int 238 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 239 struct net_device *dev, struct net_device *filter_dev, 240 int *idx) 241 { 242 struct dsa_port *dp = dsa_slave_to_port(dev); 243 struct dsa_slave_dump_ctx dump = { 244 .dev = dev, 245 .skb = skb, 246 .cb = cb, 247 .idx = *idx, 248 }; 249 int err; 250 251 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 252 *idx = dump.idx; 253 254 return err; 255 } 256 257 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 258 { 259 if (!dev->phydev) 260 return -ENODEV; 261 262 return phy_mii_ioctl(dev->phydev, ifr, cmd); 263 } 264 265 static int dsa_slave_port_attr_set(struct net_device *dev, 266 const struct switchdev_attr *attr, 267 struct switchdev_trans *trans) 268 { 269 struct dsa_port *dp = dsa_slave_to_port(dev); 270 int ret; 271 272 switch (attr->id) { 273 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 274 ret = dsa_port_set_state(dp, attr->u.stp_state, trans); 275 break; 276 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 277 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 278 trans); 279 break; 280 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 281 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans); 282 break; 283 default: 284 ret = -EOPNOTSUPP; 285 break; 286 } 287 288 return ret; 289 } 290 291 static int dsa_slave_port_obj_add(struct net_device *dev, 292 const struct switchdev_obj *obj, 293 struct switchdev_trans *trans) 294 { 295 struct dsa_port *dp = dsa_slave_to_port(dev); 296 int err; 297 298 /* For the prepare phase, ensure the full set of changes is feasable in 299 * one go in order to signal a failure properly. If an operation is not 300 * supported, return -EOPNOTSUPP. 301 */ 302 303 switch (obj->id) { 304 case SWITCHDEV_OBJ_ID_PORT_MDB: 305 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans); 306 break; 307 case SWITCHDEV_OBJ_ID_HOST_MDB: 308 /* DSA can directly translate this to a normal MDB add, 309 * but on the CPU port. 310 */ 311 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj), 312 trans); 313 break; 314 case SWITCHDEV_OBJ_ID_PORT_VLAN: 315 err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj), 316 trans); 317 break; 318 default: 319 err = -EOPNOTSUPP; 320 break; 321 } 322 323 return err; 324 } 325 326 static int dsa_slave_port_obj_del(struct net_device *dev, 327 const struct switchdev_obj *obj) 328 { 329 struct dsa_port *dp = dsa_slave_to_port(dev); 330 int err; 331 332 switch (obj->id) { 333 case SWITCHDEV_OBJ_ID_PORT_MDB: 334 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 335 break; 336 case SWITCHDEV_OBJ_ID_HOST_MDB: 337 /* DSA can directly translate this to a normal MDB add, 338 * but on the CPU port. 339 */ 340 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 341 break; 342 case SWITCHDEV_OBJ_ID_PORT_VLAN: 343 err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj)); 344 break; 345 default: 346 err = -EOPNOTSUPP; 347 break; 348 } 349 350 return err; 351 } 352 353 static int dsa_slave_port_attr_get(struct net_device *dev, 354 struct switchdev_attr *attr) 355 { 356 struct dsa_port *dp = dsa_slave_to_port(dev); 357 struct dsa_switch *ds = dp->ds; 358 struct dsa_switch_tree *dst = ds->dst; 359 360 switch (attr->id) { 361 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: 362 attr->u.ppid.id_len = sizeof(dst->index); 363 memcpy(&attr->u.ppid.id, &dst->index, attr->u.ppid.id_len); 364 break; 365 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT: 366 attr->u.brport_flags_support = 0; 367 break; 368 default: 369 return -EOPNOTSUPP; 370 } 371 372 return 0; 373 } 374 375 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 376 struct sk_buff *skb) 377 { 378 #ifdef CONFIG_NET_POLL_CONTROLLER 379 struct dsa_slave_priv *p = netdev_priv(dev); 380 381 if (p->netpoll) 382 netpoll_send_skb(p->netpoll, skb); 383 #else 384 BUG(); 385 #endif 386 return NETDEV_TX_OK; 387 } 388 389 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 390 { 391 struct dsa_slave_priv *p = netdev_priv(dev); 392 struct pcpu_sw_netstats *s; 393 struct sk_buff *nskb; 394 395 s = this_cpu_ptr(p->stats64); 396 u64_stats_update_begin(&s->syncp); 397 s->tx_packets++; 398 s->tx_bytes += skb->len; 399 u64_stats_update_end(&s->syncp); 400 401 /* Transmit function may have to reallocate the original SKB, 402 * in which case it must have freed it. Only free it here on error. 403 */ 404 nskb = p->xmit(skb, dev); 405 if (!nskb) { 406 kfree_skb(skb); 407 return NETDEV_TX_OK; 408 } 409 410 /* SKB for netpoll still need to be mangled with the protocol-specific 411 * tag to be successfully transmitted 412 */ 413 if (unlikely(netpoll_tx_running(dev))) 414 return dsa_slave_netpoll_send_skb(dev, nskb); 415 416 /* Queue the SKB for transmission on the parent interface, but 417 * do not modify its EtherType 418 */ 419 nskb->dev = dsa_slave_to_master(dev); 420 dev_queue_xmit(nskb); 421 422 return NETDEV_TX_OK; 423 } 424 425 /* ethtool operations *******************************************************/ 426 427 static void dsa_slave_get_drvinfo(struct net_device *dev, 428 struct ethtool_drvinfo *drvinfo) 429 { 430 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 431 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 432 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 433 } 434 435 static int dsa_slave_get_regs_len(struct net_device *dev) 436 { 437 struct dsa_port *dp = dsa_slave_to_port(dev); 438 struct dsa_switch *ds = dp->ds; 439 440 if (ds->ops->get_regs_len) 441 return ds->ops->get_regs_len(ds, dp->index); 442 443 return -EOPNOTSUPP; 444 } 445 446 static void 447 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 448 { 449 struct dsa_port *dp = dsa_slave_to_port(dev); 450 struct dsa_switch *ds = dp->ds; 451 452 if (ds->ops->get_regs) 453 ds->ops->get_regs(ds, dp->index, regs, _p); 454 } 455 456 static u32 dsa_slave_get_link(struct net_device *dev) 457 { 458 if (!dev->phydev) 459 return -ENODEV; 460 461 genphy_update_link(dev->phydev); 462 463 return dev->phydev->link; 464 } 465 466 static int dsa_slave_get_eeprom_len(struct net_device *dev) 467 { 468 struct dsa_port *dp = dsa_slave_to_port(dev); 469 struct dsa_switch *ds = dp->ds; 470 471 if (ds->cd && ds->cd->eeprom_len) 472 return ds->cd->eeprom_len; 473 474 if (ds->ops->get_eeprom_len) 475 return ds->ops->get_eeprom_len(ds); 476 477 return 0; 478 } 479 480 static int dsa_slave_get_eeprom(struct net_device *dev, 481 struct ethtool_eeprom *eeprom, u8 *data) 482 { 483 struct dsa_port *dp = dsa_slave_to_port(dev); 484 struct dsa_switch *ds = dp->ds; 485 486 if (ds->ops->get_eeprom) 487 return ds->ops->get_eeprom(ds, eeprom, data); 488 489 return -EOPNOTSUPP; 490 } 491 492 static int dsa_slave_set_eeprom(struct net_device *dev, 493 struct ethtool_eeprom *eeprom, u8 *data) 494 { 495 struct dsa_port *dp = dsa_slave_to_port(dev); 496 struct dsa_switch *ds = dp->ds; 497 498 if (ds->ops->set_eeprom) 499 return ds->ops->set_eeprom(ds, eeprom, data); 500 501 return -EOPNOTSUPP; 502 } 503 504 static void dsa_slave_get_strings(struct net_device *dev, 505 uint32_t stringset, uint8_t *data) 506 { 507 struct dsa_port *dp = dsa_slave_to_port(dev); 508 struct dsa_switch *ds = dp->ds; 509 510 if (stringset == ETH_SS_STATS) { 511 int len = ETH_GSTRING_LEN; 512 513 strncpy(data, "tx_packets", len); 514 strncpy(data + len, "tx_bytes", len); 515 strncpy(data + 2 * len, "rx_packets", len); 516 strncpy(data + 3 * len, "rx_bytes", len); 517 if (ds->ops->get_strings) 518 ds->ops->get_strings(ds, dp->index, data + 4 * len); 519 } 520 } 521 522 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 523 struct ethtool_stats *stats, 524 uint64_t *data) 525 { 526 struct dsa_port *dp = dsa_slave_to_port(dev); 527 struct dsa_slave_priv *p = netdev_priv(dev); 528 struct dsa_switch *ds = dp->ds; 529 struct pcpu_sw_netstats *s; 530 unsigned int start; 531 int i; 532 533 for_each_possible_cpu(i) { 534 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 535 536 s = per_cpu_ptr(p->stats64, i); 537 do { 538 start = u64_stats_fetch_begin_irq(&s->syncp); 539 tx_packets = s->tx_packets; 540 tx_bytes = s->tx_bytes; 541 rx_packets = s->rx_packets; 542 rx_bytes = s->rx_bytes; 543 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 544 data[0] += tx_packets; 545 data[1] += tx_bytes; 546 data[2] += rx_packets; 547 data[3] += rx_bytes; 548 } 549 if (ds->ops->get_ethtool_stats) 550 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 551 } 552 553 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 554 { 555 struct dsa_port *dp = dsa_slave_to_port(dev); 556 struct dsa_switch *ds = dp->ds; 557 558 if (sset == ETH_SS_STATS) { 559 int count; 560 561 count = 4; 562 if (ds->ops->get_sset_count) 563 count += ds->ops->get_sset_count(ds); 564 565 return count; 566 } 567 568 return -EOPNOTSUPP; 569 } 570 571 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 572 { 573 struct dsa_port *dp = dsa_slave_to_port(dev); 574 struct dsa_switch *ds = dp->ds; 575 576 if (ds->ops->get_wol) 577 ds->ops->get_wol(ds, dp->index, w); 578 } 579 580 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 581 { 582 struct dsa_port *dp = dsa_slave_to_port(dev); 583 struct dsa_switch *ds = dp->ds; 584 int ret = -EOPNOTSUPP; 585 586 if (ds->ops->set_wol) 587 ret = ds->ops->set_wol(ds, dp->index, w); 588 589 return ret; 590 } 591 592 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 593 { 594 struct dsa_port *dp = dsa_slave_to_port(dev); 595 struct dsa_switch *ds = dp->ds; 596 int ret; 597 598 /* Port's PHY and MAC both need to be EEE capable */ 599 if (!dev->phydev) 600 return -ENODEV; 601 602 if (!ds->ops->set_mac_eee) 603 return -EOPNOTSUPP; 604 605 ret = ds->ops->set_mac_eee(ds, dp->index, e); 606 if (ret) 607 return ret; 608 609 if (e->eee_enabled) { 610 ret = phy_init_eee(dev->phydev, 0); 611 if (ret) 612 return ret; 613 } 614 615 return phy_ethtool_set_eee(dev->phydev, e); 616 } 617 618 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 619 { 620 struct dsa_port *dp = dsa_slave_to_port(dev); 621 struct dsa_switch *ds = dp->ds; 622 int ret; 623 624 /* Port's PHY and MAC both need to be EEE capable */ 625 if (!dev->phydev) 626 return -ENODEV; 627 628 if (!ds->ops->get_mac_eee) 629 return -EOPNOTSUPP; 630 631 ret = ds->ops->get_mac_eee(ds, dp->index, e); 632 if (ret) 633 return ret; 634 635 return phy_ethtool_get_eee(dev->phydev, e); 636 } 637 638 #ifdef CONFIG_NET_POLL_CONTROLLER 639 static int dsa_slave_netpoll_setup(struct net_device *dev, 640 struct netpoll_info *ni) 641 { 642 struct net_device *master = dsa_slave_to_master(dev); 643 struct dsa_slave_priv *p = netdev_priv(dev); 644 struct netpoll *netpoll; 645 int err = 0; 646 647 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 648 if (!netpoll) 649 return -ENOMEM; 650 651 err = __netpoll_setup(netpoll, master); 652 if (err) { 653 kfree(netpoll); 654 goto out; 655 } 656 657 p->netpoll = netpoll; 658 out: 659 return err; 660 } 661 662 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 663 { 664 struct dsa_slave_priv *p = netdev_priv(dev); 665 struct netpoll *netpoll = p->netpoll; 666 667 if (!netpoll) 668 return; 669 670 p->netpoll = NULL; 671 672 __netpoll_free_async(netpoll); 673 } 674 675 static void dsa_slave_poll_controller(struct net_device *dev) 676 { 677 } 678 #endif 679 680 static int dsa_slave_get_phys_port_name(struct net_device *dev, 681 char *name, size_t len) 682 { 683 struct dsa_port *dp = dsa_slave_to_port(dev); 684 685 if (snprintf(name, len, "p%d", dp->index) >= len) 686 return -EINVAL; 687 688 return 0; 689 } 690 691 static struct dsa_mall_tc_entry * 692 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 693 { 694 struct dsa_slave_priv *p = netdev_priv(dev); 695 struct dsa_mall_tc_entry *mall_tc_entry; 696 697 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 698 if (mall_tc_entry->cookie == cookie) 699 return mall_tc_entry; 700 701 return NULL; 702 } 703 704 static int dsa_slave_add_cls_matchall(struct net_device *dev, 705 struct tc_cls_matchall_offload *cls, 706 bool ingress) 707 { 708 struct dsa_port *dp = dsa_slave_to_port(dev); 709 struct dsa_slave_priv *p = netdev_priv(dev); 710 struct dsa_mall_tc_entry *mall_tc_entry; 711 __be16 protocol = cls->common.protocol; 712 struct net *net = dev_net(dev); 713 struct dsa_switch *ds = dp->ds; 714 struct net_device *to_dev; 715 const struct tc_action *a; 716 struct dsa_port *to_dp; 717 int err = -EOPNOTSUPP; 718 LIST_HEAD(actions); 719 int ifindex; 720 721 if (!ds->ops->port_mirror_add) 722 return err; 723 724 if (!tcf_exts_has_one_action(cls->exts)) 725 return err; 726 727 tcf_exts_to_list(cls->exts, &actions); 728 a = list_first_entry(&actions, struct tc_action, list); 729 730 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) { 731 struct dsa_mall_mirror_tc_entry *mirror; 732 733 ifindex = tcf_mirred_ifindex(a); 734 to_dev = __dev_get_by_index(net, ifindex); 735 if (!to_dev) 736 return -EINVAL; 737 738 if (!dsa_slave_dev_check(to_dev)) 739 return -EOPNOTSUPP; 740 741 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 742 if (!mall_tc_entry) 743 return -ENOMEM; 744 745 mall_tc_entry->cookie = cls->cookie; 746 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 747 mirror = &mall_tc_entry->mirror; 748 749 to_dp = dsa_slave_to_port(to_dev); 750 751 mirror->to_local_port = to_dp->index; 752 mirror->ingress = ingress; 753 754 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); 755 if (err) { 756 kfree(mall_tc_entry); 757 return err; 758 } 759 760 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 761 } 762 763 return 0; 764 } 765 766 static void dsa_slave_del_cls_matchall(struct net_device *dev, 767 struct tc_cls_matchall_offload *cls) 768 { 769 struct dsa_port *dp = dsa_slave_to_port(dev); 770 struct dsa_mall_tc_entry *mall_tc_entry; 771 struct dsa_switch *ds = dp->ds; 772 773 if (!ds->ops->port_mirror_del) 774 return; 775 776 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 777 if (!mall_tc_entry) 778 return; 779 780 list_del(&mall_tc_entry->list); 781 782 switch (mall_tc_entry->type) { 783 case DSA_PORT_MALL_MIRROR: 784 ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror); 785 break; 786 default: 787 WARN_ON(1); 788 } 789 790 kfree(mall_tc_entry); 791 } 792 793 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 794 struct tc_cls_matchall_offload *cls, 795 bool ingress) 796 { 797 if (cls->common.chain_index) 798 return -EOPNOTSUPP; 799 800 switch (cls->command) { 801 case TC_CLSMATCHALL_REPLACE: 802 return dsa_slave_add_cls_matchall(dev, cls, ingress); 803 case TC_CLSMATCHALL_DESTROY: 804 dsa_slave_del_cls_matchall(dev, cls); 805 return 0; 806 default: 807 return -EOPNOTSUPP; 808 } 809 } 810 811 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 812 void *cb_priv, bool ingress) 813 { 814 struct net_device *dev = cb_priv; 815 816 if (!tc_can_offload(dev)) 817 return -EOPNOTSUPP; 818 819 switch (type) { 820 case TC_SETUP_CLSMATCHALL: 821 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 822 default: 823 return -EOPNOTSUPP; 824 } 825 } 826 827 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 828 void *type_data, void *cb_priv) 829 { 830 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 831 } 832 833 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 834 void *type_data, void *cb_priv) 835 { 836 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 837 } 838 839 static int dsa_slave_setup_tc_block(struct net_device *dev, 840 struct tc_block_offload *f) 841 { 842 tc_setup_cb_t *cb; 843 844 if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 845 cb = dsa_slave_setup_tc_block_cb_ig; 846 else if (f->binder_type == TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 847 cb = dsa_slave_setup_tc_block_cb_eg; 848 else 849 return -EOPNOTSUPP; 850 851 switch (f->command) { 852 case TC_BLOCK_BIND: 853 return tcf_block_cb_register(f->block, cb, dev, dev); 854 case TC_BLOCK_UNBIND: 855 tcf_block_cb_unregister(f->block, cb, dev); 856 return 0; 857 default: 858 return -EOPNOTSUPP; 859 } 860 } 861 862 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 863 void *type_data) 864 { 865 switch (type) { 866 case TC_SETUP_BLOCK: 867 return dsa_slave_setup_tc_block(dev, type_data); 868 default: 869 return -EOPNOTSUPP; 870 } 871 } 872 873 static void dsa_slave_get_stats64(struct net_device *dev, 874 struct rtnl_link_stats64 *stats) 875 { 876 struct dsa_slave_priv *p = netdev_priv(dev); 877 struct pcpu_sw_netstats *s; 878 unsigned int start; 879 int i; 880 881 netdev_stats_to_stats64(stats, &dev->stats); 882 for_each_possible_cpu(i) { 883 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 884 885 s = per_cpu_ptr(p->stats64, i); 886 do { 887 start = u64_stats_fetch_begin_irq(&s->syncp); 888 tx_packets = s->tx_packets; 889 tx_bytes = s->tx_bytes; 890 rx_packets = s->rx_packets; 891 rx_bytes = s->rx_bytes; 892 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 893 894 stats->tx_packets += tx_packets; 895 stats->tx_bytes += tx_bytes; 896 stats->rx_packets += rx_packets; 897 stats->rx_bytes += rx_bytes; 898 } 899 } 900 901 static int dsa_slave_get_rxnfc(struct net_device *dev, 902 struct ethtool_rxnfc *nfc, u32 *rule_locs) 903 { 904 struct dsa_port *dp = dsa_slave_to_port(dev); 905 struct dsa_switch *ds = dp->ds; 906 907 if (!ds->ops->get_rxnfc) 908 return -EOPNOTSUPP; 909 910 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 911 } 912 913 static int dsa_slave_set_rxnfc(struct net_device *dev, 914 struct ethtool_rxnfc *nfc) 915 { 916 struct dsa_port *dp = dsa_slave_to_port(dev); 917 struct dsa_switch *ds = dp->ds; 918 919 if (!ds->ops->set_rxnfc) 920 return -EOPNOTSUPP; 921 922 return ds->ops->set_rxnfc(ds, dp->index, nfc); 923 } 924 925 static const struct ethtool_ops dsa_slave_ethtool_ops = { 926 .get_drvinfo = dsa_slave_get_drvinfo, 927 .get_regs_len = dsa_slave_get_regs_len, 928 .get_regs = dsa_slave_get_regs, 929 .nway_reset = phy_ethtool_nway_reset, 930 .get_link = dsa_slave_get_link, 931 .get_eeprom_len = dsa_slave_get_eeprom_len, 932 .get_eeprom = dsa_slave_get_eeprom, 933 .set_eeprom = dsa_slave_set_eeprom, 934 .get_strings = dsa_slave_get_strings, 935 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 936 .get_sset_count = dsa_slave_get_sset_count, 937 .set_wol = dsa_slave_set_wol, 938 .get_wol = dsa_slave_get_wol, 939 .set_eee = dsa_slave_set_eee, 940 .get_eee = dsa_slave_get_eee, 941 .get_link_ksettings = phy_ethtool_get_link_ksettings, 942 .set_link_ksettings = phy_ethtool_set_link_ksettings, 943 .get_rxnfc = dsa_slave_get_rxnfc, 944 .set_rxnfc = dsa_slave_set_rxnfc, 945 }; 946 947 static const struct net_device_ops dsa_slave_netdev_ops = { 948 .ndo_open = dsa_slave_open, 949 .ndo_stop = dsa_slave_close, 950 .ndo_start_xmit = dsa_slave_xmit, 951 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 952 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 953 .ndo_set_mac_address = dsa_slave_set_mac_address, 954 .ndo_fdb_add = dsa_legacy_fdb_add, 955 .ndo_fdb_del = dsa_legacy_fdb_del, 956 .ndo_fdb_dump = dsa_slave_fdb_dump, 957 .ndo_do_ioctl = dsa_slave_ioctl, 958 .ndo_get_iflink = dsa_slave_get_iflink, 959 #ifdef CONFIG_NET_POLL_CONTROLLER 960 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 961 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 962 .ndo_poll_controller = dsa_slave_poll_controller, 963 #endif 964 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 965 .ndo_setup_tc = dsa_slave_setup_tc, 966 .ndo_get_stats64 = dsa_slave_get_stats64, 967 }; 968 969 static const struct switchdev_ops dsa_slave_switchdev_ops = { 970 .switchdev_port_attr_get = dsa_slave_port_attr_get, 971 .switchdev_port_attr_set = dsa_slave_port_attr_set, 972 .switchdev_port_obj_add = dsa_slave_port_obj_add, 973 .switchdev_port_obj_del = dsa_slave_port_obj_del, 974 }; 975 976 static struct device_type dsa_type = { 977 .name = "dsa", 978 }; 979 980 static void dsa_slave_adjust_link(struct net_device *dev) 981 { 982 struct dsa_port *dp = dsa_slave_to_port(dev); 983 struct dsa_slave_priv *p = netdev_priv(dev); 984 struct dsa_switch *ds = dp->ds; 985 unsigned int status_changed = 0; 986 987 if (p->old_link != dev->phydev->link) { 988 status_changed = 1; 989 p->old_link = dev->phydev->link; 990 } 991 992 if (p->old_duplex != dev->phydev->duplex) { 993 status_changed = 1; 994 p->old_duplex = dev->phydev->duplex; 995 } 996 997 if (p->old_pause != dev->phydev->pause) { 998 status_changed = 1; 999 p->old_pause = dev->phydev->pause; 1000 } 1001 1002 if (ds->ops->adjust_link && status_changed) 1003 ds->ops->adjust_link(ds, dp->index, dev->phydev); 1004 1005 if (status_changed) 1006 phy_print_status(dev->phydev); 1007 } 1008 1009 static int dsa_slave_fixed_link_update(struct net_device *dev, 1010 struct fixed_phy_status *status) 1011 { 1012 struct dsa_switch *ds; 1013 struct dsa_port *dp; 1014 1015 if (dev) { 1016 dp = dsa_slave_to_port(dev); 1017 ds = dp->ds; 1018 if (ds->ops->fixed_link_update) 1019 ds->ops->fixed_link_update(ds, dp->index, status); 1020 } 1021 1022 return 0; 1023 } 1024 1025 /* slave device setup *******************************************************/ 1026 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) 1027 { 1028 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1029 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1030 struct dsa_switch *ds = dp->ds; 1031 1032 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 1033 if (!slave_dev->phydev) { 1034 netdev_err(slave_dev, "no phy at %d\n", addr); 1035 return -ENODEV; 1036 } 1037 1038 /* Use already configured phy mode */ 1039 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1040 p->phy_interface = slave_dev->phydev->interface; 1041 1042 return phy_connect_direct(slave_dev, slave_dev->phydev, 1043 dsa_slave_adjust_link, p->phy_interface); 1044 } 1045 1046 static int dsa_slave_phy_setup(struct net_device *slave_dev) 1047 { 1048 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1049 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1050 struct device_node *port_dn = dp->dn; 1051 struct dsa_switch *ds = dp->ds; 1052 struct device_node *phy_dn; 1053 bool phy_is_fixed = false; 1054 u32 phy_flags = 0; 1055 int mode, ret; 1056 1057 mode = of_get_phy_mode(port_dn); 1058 if (mode < 0) 1059 mode = PHY_INTERFACE_MODE_NA; 1060 p->phy_interface = mode; 1061 1062 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1063 if (!phy_dn && of_phy_is_fixed_link(port_dn)) { 1064 /* In the case of a fixed PHY, the DT node associated 1065 * to the fixed PHY is the Port DT node 1066 */ 1067 ret = of_phy_register_fixed_link(port_dn); 1068 if (ret) { 1069 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1070 return ret; 1071 } 1072 phy_is_fixed = true; 1073 phy_dn = of_node_get(port_dn); 1074 } 1075 1076 if (ds->ops->get_phy_flags) 1077 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 1078 1079 if (phy_dn) { 1080 slave_dev->phydev = of_phy_connect(slave_dev, phy_dn, 1081 dsa_slave_adjust_link, 1082 phy_flags, 1083 p->phy_interface); 1084 of_node_put(phy_dn); 1085 } 1086 1087 if (slave_dev->phydev && phy_is_fixed) 1088 fixed_phy_set_link_update(slave_dev->phydev, 1089 dsa_slave_fixed_link_update); 1090 1091 /* We could not connect to a designated PHY, so use the switch internal 1092 * MDIO bus instead 1093 */ 1094 if (!slave_dev->phydev) { 1095 ret = dsa_slave_phy_connect(slave_dev, dp->index); 1096 if (ret) { 1097 netdev_err(slave_dev, "failed to connect to port %d: %d\n", 1098 dp->index, ret); 1099 if (phy_is_fixed) 1100 of_phy_deregister_fixed_link(port_dn); 1101 return ret; 1102 } 1103 } 1104 1105 phy_attached_info(slave_dev->phydev); 1106 1107 return 0; 1108 } 1109 1110 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1111 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1112 struct netdev_queue *txq, 1113 void *_unused) 1114 { 1115 lockdep_set_class(&txq->_xmit_lock, 1116 &dsa_slave_netdev_xmit_lock_key); 1117 } 1118 1119 int dsa_slave_suspend(struct net_device *slave_dev) 1120 { 1121 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1122 1123 netif_device_detach(slave_dev); 1124 1125 if (slave_dev->phydev) { 1126 phy_stop(slave_dev->phydev); 1127 p->old_pause = -1; 1128 p->old_link = -1; 1129 p->old_duplex = -1; 1130 phy_suspend(slave_dev->phydev); 1131 } 1132 1133 return 0; 1134 } 1135 1136 int dsa_slave_resume(struct net_device *slave_dev) 1137 { 1138 netif_device_attach(slave_dev); 1139 1140 if (slave_dev->phydev) { 1141 phy_resume(slave_dev->phydev); 1142 phy_start(slave_dev->phydev); 1143 } 1144 1145 return 0; 1146 } 1147 1148 static void dsa_slave_notify(struct net_device *dev, unsigned long val) 1149 { 1150 struct net_device *master = dsa_slave_to_master(dev); 1151 struct dsa_port *dp = dsa_slave_to_port(dev); 1152 struct dsa_notifier_register_info rinfo = { 1153 .switch_number = dp->ds->index, 1154 .port_number = dp->index, 1155 .master = master, 1156 .info.dev = dev, 1157 }; 1158 1159 call_dsa_notifiers(val, dev, &rinfo.info); 1160 } 1161 1162 int dsa_slave_create(struct dsa_port *port) 1163 { 1164 const struct dsa_port *cpu_dp = port->cpu_dp; 1165 struct net_device *master = cpu_dp->master; 1166 struct dsa_switch *ds = port->ds; 1167 const char *name = port->name; 1168 struct net_device *slave_dev; 1169 struct dsa_slave_priv *p; 1170 int ret; 1171 1172 if (!ds->num_tx_queues) 1173 ds->num_tx_queues = 1; 1174 1175 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 1176 NET_NAME_UNKNOWN, ether_setup, 1177 ds->num_tx_queues, 1); 1178 if (slave_dev == NULL) 1179 return -ENOMEM; 1180 1181 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1182 slave_dev->hw_features |= NETIF_F_HW_TC; 1183 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1184 eth_hw_addr_inherit(slave_dev, master); 1185 slave_dev->priv_flags |= IFF_NO_QUEUE; 1186 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1187 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1188 slave_dev->min_mtu = 0; 1189 slave_dev->max_mtu = ETH_MAX_MTU; 1190 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1191 1192 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1193 NULL); 1194 1195 SET_NETDEV_DEV(slave_dev, port->ds->dev); 1196 slave_dev->dev.of_node = port->dn; 1197 slave_dev->vlan_features = master->vlan_features; 1198 1199 p = netdev_priv(slave_dev); 1200 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1201 if (!p->stats64) { 1202 free_netdev(slave_dev); 1203 return -ENOMEM; 1204 } 1205 p->dp = port; 1206 INIT_LIST_HEAD(&p->mall_tc_list); 1207 p->xmit = cpu_dp->tag_ops->xmit; 1208 1209 p->old_pause = -1; 1210 p->old_link = -1; 1211 p->old_duplex = -1; 1212 1213 port->slave = slave_dev; 1214 1215 netif_carrier_off(slave_dev); 1216 1217 ret = dsa_slave_phy_setup(slave_dev); 1218 if (ret) { 1219 netdev_err(master, "error %d setting up slave phy\n", ret); 1220 goto out_free; 1221 } 1222 1223 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER); 1224 1225 ret = register_netdev(slave_dev); 1226 if (ret) { 1227 netdev_err(master, "error %d registering interface %s\n", 1228 ret, slave_dev->name); 1229 goto out_phy; 1230 } 1231 1232 return 0; 1233 1234 out_phy: 1235 phy_disconnect(slave_dev->phydev); 1236 if (of_phy_is_fixed_link(port->dn)) 1237 of_phy_deregister_fixed_link(port->dn); 1238 out_free: 1239 free_percpu(p->stats64); 1240 free_netdev(slave_dev); 1241 port->slave = NULL; 1242 return ret; 1243 } 1244 1245 void dsa_slave_destroy(struct net_device *slave_dev) 1246 { 1247 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1248 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1249 struct device_node *port_dn = dp->dn; 1250 1251 netif_carrier_off(slave_dev); 1252 if (slave_dev->phydev) { 1253 phy_disconnect(slave_dev->phydev); 1254 1255 if (of_phy_is_fixed_link(port_dn)) 1256 of_phy_deregister_fixed_link(port_dn); 1257 } 1258 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER); 1259 unregister_netdev(slave_dev); 1260 free_percpu(p->stats64); 1261 free_netdev(slave_dev); 1262 } 1263 1264 static bool dsa_slave_dev_check(struct net_device *dev) 1265 { 1266 return dev->netdev_ops == &dsa_slave_netdev_ops; 1267 } 1268 1269 static int dsa_slave_changeupper(struct net_device *dev, 1270 struct netdev_notifier_changeupper_info *info) 1271 { 1272 struct dsa_port *dp = dsa_slave_to_port(dev); 1273 int err = NOTIFY_DONE; 1274 1275 if (netif_is_bridge_master(info->upper_dev)) { 1276 if (info->linking) { 1277 err = dsa_port_bridge_join(dp, info->upper_dev); 1278 err = notifier_from_errno(err); 1279 } else { 1280 dsa_port_bridge_leave(dp, info->upper_dev); 1281 err = NOTIFY_OK; 1282 } 1283 } 1284 1285 return err; 1286 } 1287 1288 static int dsa_slave_netdevice_event(struct notifier_block *nb, 1289 unsigned long event, void *ptr) 1290 { 1291 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1292 1293 if (!dsa_slave_dev_check(dev)) 1294 return NOTIFY_DONE; 1295 1296 if (event == NETDEV_CHANGEUPPER) 1297 return dsa_slave_changeupper(dev, ptr); 1298 1299 return NOTIFY_DONE; 1300 } 1301 1302 struct dsa_switchdev_event_work { 1303 struct work_struct work; 1304 struct switchdev_notifier_fdb_info fdb_info; 1305 struct net_device *dev; 1306 unsigned long event; 1307 }; 1308 1309 static void dsa_slave_switchdev_event_work(struct work_struct *work) 1310 { 1311 struct dsa_switchdev_event_work *switchdev_work = 1312 container_of(work, struct dsa_switchdev_event_work, work); 1313 struct net_device *dev = switchdev_work->dev; 1314 struct switchdev_notifier_fdb_info *fdb_info; 1315 struct dsa_port *dp = dsa_slave_to_port(dev); 1316 int err; 1317 1318 rtnl_lock(); 1319 switch (switchdev_work->event) { 1320 case SWITCHDEV_FDB_ADD_TO_DEVICE: 1321 fdb_info = &switchdev_work->fdb_info; 1322 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid); 1323 if (err) { 1324 netdev_dbg(dev, "fdb add failed err=%d\n", err); 1325 break; 1326 } 1327 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev, 1328 &fdb_info->info); 1329 break; 1330 1331 case SWITCHDEV_FDB_DEL_TO_DEVICE: 1332 fdb_info = &switchdev_work->fdb_info; 1333 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid); 1334 if (err) { 1335 netdev_dbg(dev, "fdb del failed err=%d\n", err); 1336 dev_close(dev); 1337 } 1338 break; 1339 } 1340 rtnl_unlock(); 1341 1342 kfree(switchdev_work->fdb_info.addr); 1343 kfree(switchdev_work); 1344 dev_put(dev); 1345 } 1346 1347 static int 1348 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work * 1349 switchdev_work, 1350 const struct switchdev_notifier_fdb_info * 1351 fdb_info) 1352 { 1353 memcpy(&switchdev_work->fdb_info, fdb_info, 1354 sizeof(switchdev_work->fdb_info)); 1355 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC); 1356 if (!switchdev_work->fdb_info.addr) 1357 return -ENOMEM; 1358 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr, 1359 fdb_info->addr); 1360 return 0; 1361 } 1362 1363 /* Called under rcu_read_lock() */ 1364 static int dsa_slave_switchdev_event(struct notifier_block *unused, 1365 unsigned long event, void *ptr) 1366 { 1367 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 1368 struct dsa_switchdev_event_work *switchdev_work; 1369 1370 if (!dsa_slave_dev_check(dev)) 1371 return NOTIFY_DONE; 1372 1373 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 1374 if (!switchdev_work) 1375 return NOTIFY_BAD; 1376 1377 INIT_WORK(&switchdev_work->work, 1378 dsa_slave_switchdev_event_work); 1379 switchdev_work->dev = dev; 1380 switchdev_work->event = event; 1381 1382 switch (event) { 1383 case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */ 1384 case SWITCHDEV_FDB_DEL_TO_DEVICE: 1385 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, 1386 ptr)) 1387 goto err_fdb_work_init; 1388 dev_hold(dev); 1389 break; 1390 default: 1391 kfree(switchdev_work); 1392 return NOTIFY_DONE; 1393 } 1394 1395 dsa_schedule_work(&switchdev_work->work); 1396 return NOTIFY_OK; 1397 1398 err_fdb_work_init: 1399 kfree(switchdev_work); 1400 return NOTIFY_BAD; 1401 } 1402 1403 static struct notifier_block dsa_slave_nb __read_mostly = { 1404 .notifier_call = dsa_slave_netdevice_event, 1405 }; 1406 1407 static struct notifier_block dsa_slave_switchdev_notifier = { 1408 .notifier_call = dsa_slave_switchdev_event, 1409 }; 1410 1411 int dsa_slave_register_notifier(void) 1412 { 1413 int err; 1414 1415 err = register_netdevice_notifier(&dsa_slave_nb); 1416 if (err) 1417 return err; 1418 1419 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 1420 if (err) 1421 goto err_switchdev_nb; 1422 1423 return 0; 1424 1425 err_switchdev_nb: 1426 unregister_netdevice_notifier(&dsa_slave_nb); 1427 return err; 1428 } 1429 1430 void dsa_slave_unregister_notifier(void) 1431 { 1432 int err; 1433 1434 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 1435 if (err) 1436 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 1437 1438 err = unregister_netdevice_notifier(&dsa_slave_nb); 1439 if (err) 1440 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 1441 } 1442