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 /* Must be called under rcu_read_lock() */ 307 static int 308 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave, 309 const struct switchdev_obj_port_vlan *vlan) 310 { 311 struct net_device *upper_dev; 312 struct list_head *iter; 313 314 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 315 u16 vid; 316 317 if (!is_vlan_dev(upper_dev)) 318 continue; 319 320 vid = vlan_dev_vlan_id(upper_dev); 321 if (vid >= vlan->vid_begin && vid <= vlan->vid_end) 322 return -EBUSY; 323 } 324 325 return 0; 326 } 327 328 static int dsa_slave_vlan_add(struct net_device *dev, 329 const struct switchdev_obj *obj, 330 struct switchdev_trans *trans) 331 { 332 struct net_device *master = dsa_slave_to_master(dev); 333 struct dsa_port *dp = dsa_slave_to_port(dev); 334 struct switchdev_obj_port_vlan vlan; 335 int vid, err; 336 337 if (obj->orig_dev != dev) 338 return -EOPNOTSUPP; 339 340 if (dsa_port_skip_vlan_configuration(dp)) 341 return 0; 342 343 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 344 345 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 346 * the same VID. 347 */ 348 if (trans->ph_prepare && br_vlan_enabled(dp->bridge_dev)) { 349 rcu_read_lock(); 350 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan); 351 rcu_read_unlock(); 352 if (err) 353 return err; 354 } 355 356 err = dsa_port_vlan_add(dp, &vlan, trans); 357 if (err) 358 return err; 359 360 /* We need the dedicated CPU port to be a member of the VLAN as well. 361 * Even though drivers often handle CPU membership in special ways, 362 * it doesn't make sense to program a PVID, so clear this flag. 363 */ 364 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 365 366 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, trans); 367 if (err) 368 return err; 369 370 for (vid = vlan.vid_begin; vid <= vlan.vid_end; vid++) { 371 err = vlan_vid_add(master, htons(ETH_P_8021Q), vid); 372 if (err) 373 return err; 374 } 375 376 return 0; 377 } 378 379 static int dsa_slave_port_obj_add(struct net_device *dev, 380 const struct switchdev_obj *obj, 381 struct switchdev_trans *trans, 382 struct netlink_ext_ack *extack) 383 { 384 struct dsa_port *dp = dsa_slave_to_port(dev); 385 int err; 386 387 /* For the prepare phase, ensure the full set of changes is feasable in 388 * one go in order to signal a failure properly. If an operation is not 389 * supported, return -EOPNOTSUPP. 390 */ 391 392 switch (obj->id) { 393 case SWITCHDEV_OBJ_ID_PORT_MDB: 394 if (obj->orig_dev != dev) 395 return -EOPNOTSUPP; 396 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans); 397 break; 398 case SWITCHDEV_OBJ_ID_HOST_MDB: 399 /* DSA can directly translate this to a normal MDB add, 400 * but on the CPU port. 401 */ 402 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj), 403 trans); 404 break; 405 case SWITCHDEV_OBJ_ID_PORT_VLAN: 406 err = dsa_slave_vlan_add(dev, obj, trans); 407 break; 408 default: 409 err = -EOPNOTSUPP; 410 break; 411 } 412 413 return err; 414 } 415 416 static int dsa_slave_vlan_del(struct net_device *dev, 417 const struct switchdev_obj *obj) 418 { 419 struct net_device *master = dsa_slave_to_master(dev); 420 struct dsa_port *dp = dsa_slave_to_port(dev); 421 struct switchdev_obj_port_vlan *vlan; 422 int vid, err; 423 424 if (obj->orig_dev != dev) 425 return -EOPNOTSUPP; 426 427 if (dsa_port_skip_vlan_configuration(dp)) 428 return 0; 429 430 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 431 432 /* Do not deprogram the CPU port as it may be shared with other user 433 * ports which can be members of this VLAN as well. 434 */ 435 err = dsa_port_vlan_del(dp, vlan); 436 if (err) 437 return err; 438 439 for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) 440 vlan_vid_del(master, htons(ETH_P_8021Q), vid); 441 442 return 0; 443 } 444 445 static int dsa_slave_port_obj_del(struct net_device *dev, 446 const struct switchdev_obj *obj) 447 { 448 struct dsa_port *dp = dsa_slave_to_port(dev); 449 int err; 450 451 switch (obj->id) { 452 case SWITCHDEV_OBJ_ID_PORT_MDB: 453 if (obj->orig_dev != dev) 454 return -EOPNOTSUPP; 455 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 456 break; 457 case SWITCHDEV_OBJ_ID_HOST_MDB: 458 /* DSA can directly translate this to a normal MDB add, 459 * but on the CPU port. 460 */ 461 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 462 break; 463 case SWITCHDEV_OBJ_ID_PORT_VLAN: 464 err = dsa_slave_vlan_del(dev, obj); 465 break; 466 default: 467 err = -EOPNOTSUPP; 468 break; 469 } 470 471 return err; 472 } 473 474 static int dsa_slave_get_port_parent_id(struct net_device *dev, 475 struct netdev_phys_item_id *ppid) 476 { 477 struct dsa_port *dp = dsa_slave_to_port(dev); 478 struct dsa_switch *ds = dp->ds; 479 struct dsa_switch_tree *dst = ds->dst; 480 481 /* For non-legacy ports, devlink is used and it takes 482 * care of the name generation. This ndo implementation 483 * should be removed with legacy support. 484 */ 485 if (dp->ds->devlink) 486 return -EOPNOTSUPP; 487 488 ppid->id_len = sizeof(dst->index); 489 memcpy(&ppid->id, &dst->index, ppid->id_len); 490 491 return 0; 492 } 493 494 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 495 struct sk_buff *skb) 496 { 497 #ifdef CONFIG_NET_POLL_CONTROLLER 498 struct dsa_slave_priv *p = netdev_priv(dev); 499 500 return netpoll_send_skb(p->netpoll, skb); 501 #else 502 BUG(); 503 return NETDEV_TX_OK; 504 #endif 505 } 506 507 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 508 struct sk_buff *skb) 509 { 510 struct dsa_switch *ds = p->dp->ds; 511 struct sk_buff *clone; 512 unsigned int type; 513 514 type = ptp_classify_raw(skb); 515 if (type == PTP_CLASS_NONE) 516 return; 517 518 if (!ds->ops->port_txtstamp) 519 return; 520 521 clone = skb_clone_sk(skb); 522 if (!clone) 523 return; 524 525 DSA_SKB_CB(skb)->clone = clone; 526 527 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) 528 return; 529 530 kfree_skb(clone); 531 } 532 533 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 534 { 535 /* SKB for netpoll still need to be mangled with the protocol-specific 536 * tag to be successfully transmitted 537 */ 538 if (unlikely(netpoll_tx_running(dev))) 539 return dsa_slave_netpoll_send_skb(dev, skb); 540 541 /* Queue the SKB for transmission on the parent interface, but 542 * do not modify its EtherType 543 */ 544 skb->dev = dsa_slave_to_master(dev); 545 dev_queue_xmit(skb); 546 547 return NETDEV_TX_OK; 548 } 549 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 550 551 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 552 { 553 struct dsa_slave_priv *p = netdev_priv(dev); 554 struct pcpu_sw_netstats *s; 555 struct sk_buff *nskb; 556 557 s = this_cpu_ptr(p->stats64); 558 u64_stats_update_begin(&s->syncp); 559 s->tx_packets++; 560 s->tx_bytes += skb->len; 561 u64_stats_update_end(&s->syncp); 562 563 DSA_SKB_CB(skb)->clone = NULL; 564 565 /* Identify PTP protocol packets, clone them, and pass them to the 566 * switch driver 567 */ 568 dsa_skb_tx_timestamp(p, skb); 569 570 /* Transmit function may have to reallocate the original SKB, 571 * in which case it must have freed it. Only free it here on error. 572 */ 573 nskb = p->xmit(skb, dev); 574 if (!nskb) { 575 kfree_skb(skb); 576 return NETDEV_TX_OK; 577 } 578 579 return dsa_enqueue_skb(nskb, dev); 580 } 581 582 /* ethtool operations *******************************************************/ 583 584 static void dsa_slave_get_drvinfo(struct net_device *dev, 585 struct ethtool_drvinfo *drvinfo) 586 { 587 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 588 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 589 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 590 } 591 592 static int dsa_slave_get_regs_len(struct net_device *dev) 593 { 594 struct dsa_port *dp = dsa_slave_to_port(dev); 595 struct dsa_switch *ds = dp->ds; 596 597 if (ds->ops->get_regs_len) 598 return ds->ops->get_regs_len(ds, dp->index); 599 600 return -EOPNOTSUPP; 601 } 602 603 static void 604 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 605 { 606 struct dsa_port *dp = dsa_slave_to_port(dev); 607 struct dsa_switch *ds = dp->ds; 608 609 if (ds->ops->get_regs) 610 ds->ops->get_regs(ds, dp->index, regs, _p); 611 } 612 613 static int dsa_slave_nway_reset(struct net_device *dev) 614 { 615 struct dsa_port *dp = dsa_slave_to_port(dev); 616 617 return phylink_ethtool_nway_reset(dp->pl); 618 } 619 620 static int dsa_slave_get_eeprom_len(struct net_device *dev) 621 { 622 struct dsa_port *dp = dsa_slave_to_port(dev); 623 struct dsa_switch *ds = dp->ds; 624 625 if (ds->cd && ds->cd->eeprom_len) 626 return ds->cd->eeprom_len; 627 628 if (ds->ops->get_eeprom_len) 629 return ds->ops->get_eeprom_len(ds); 630 631 return 0; 632 } 633 634 static int dsa_slave_get_eeprom(struct net_device *dev, 635 struct ethtool_eeprom *eeprom, u8 *data) 636 { 637 struct dsa_port *dp = dsa_slave_to_port(dev); 638 struct dsa_switch *ds = dp->ds; 639 640 if (ds->ops->get_eeprom) 641 return ds->ops->get_eeprom(ds, eeprom, data); 642 643 return -EOPNOTSUPP; 644 } 645 646 static int dsa_slave_set_eeprom(struct net_device *dev, 647 struct ethtool_eeprom *eeprom, u8 *data) 648 { 649 struct dsa_port *dp = dsa_slave_to_port(dev); 650 struct dsa_switch *ds = dp->ds; 651 652 if (ds->ops->set_eeprom) 653 return ds->ops->set_eeprom(ds, eeprom, data); 654 655 return -EOPNOTSUPP; 656 } 657 658 static void dsa_slave_get_strings(struct net_device *dev, 659 uint32_t stringset, uint8_t *data) 660 { 661 struct dsa_port *dp = dsa_slave_to_port(dev); 662 struct dsa_switch *ds = dp->ds; 663 664 if (stringset == ETH_SS_STATS) { 665 int len = ETH_GSTRING_LEN; 666 667 strncpy(data, "tx_packets", len); 668 strncpy(data + len, "tx_bytes", len); 669 strncpy(data + 2 * len, "rx_packets", len); 670 strncpy(data + 3 * len, "rx_bytes", len); 671 if (ds->ops->get_strings) 672 ds->ops->get_strings(ds, dp->index, stringset, 673 data + 4 * len); 674 } 675 } 676 677 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 678 struct ethtool_stats *stats, 679 uint64_t *data) 680 { 681 struct dsa_port *dp = dsa_slave_to_port(dev); 682 struct dsa_slave_priv *p = netdev_priv(dev); 683 struct dsa_switch *ds = dp->ds; 684 struct pcpu_sw_netstats *s; 685 unsigned int start; 686 int i; 687 688 for_each_possible_cpu(i) { 689 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 690 691 s = per_cpu_ptr(p->stats64, i); 692 do { 693 start = u64_stats_fetch_begin_irq(&s->syncp); 694 tx_packets = s->tx_packets; 695 tx_bytes = s->tx_bytes; 696 rx_packets = s->rx_packets; 697 rx_bytes = s->rx_bytes; 698 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 699 data[0] += tx_packets; 700 data[1] += tx_bytes; 701 data[2] += rx_packets; 702 data[3] += rx_bytes; 703 } 704 if (ds->ops->get_ethtool_stats) 705 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 706 } 707 708 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 709 { 710 struct dsa_port *dp = dsa_slave_to_port(dev); 711 struct dsa_switch *ds = dp->ds; 712 713 if (sset == ETH_SS_STATS) { 714 int count; 715 716 count = 4; 717 if (ds->ops->get_sset_count) 718 count += ds->ops->get_sset_count(ds, dp->index, sset); 719 720 return count; 721 } 722 723 return -EOPNOTSUPP; 724 } 725 726 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 727 { 728 struct dsa_port *dp = dsa_slave_to_port(dev); 729 struct dsa_switch *ds = dp->ds; 730 731 phylink_ethtool_get_wol(dp->pl, w); 732 733 if (ds->ops->get_wol) 734 ds->ops->get_wol(ds, dp->index, w); 735 } 736 737 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 738 { 739 struct dsa_port *dp = dsa_slave_to_port(dev); 740 struct dsa_switch *ds = dp->ds; 741 int ret = -EOPNOTSUPP; 742 743 phylink_ethtool_set_wol(dp->pl, w); 744 745 if (ds->ops->set_wol) 746 ret = ds->ops->set_wol(ds, dp->index, w); 747 748 return ret; 749 } 750 751 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 752 { 753 struct dsa_port *dp = dsa_slave_to_port(dev); 754 struct dsa_switch *ds = dp->ds; 755 int ret; 756 757 /* Port's PHY and MAC both need to be EEE capable */ 758 if (!dev->phydev || !dp->pl) 759 return -ENODEV; 760 761 if (!ds->ops->set_mac_eee) 762 return -EOPNOTSUPP; 763 764 ret = ds->ops->set_mac_eee(ds, dp->index, e); 765 if (ret) 766 return ret; 767 768 return phylink_ethtool_set_eee(dp->pl, e); 769 } 770 771 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 772 { 773 struct dsa_port *dp = dsa_slave_to_port(dev); 774 struct dsa_switch *ds = dp->ds; 775 int ret; 776 777 /* Port's PHY and MAC both need to be EEE capable */ 778 if (!dev->phydev || !dp->pl) 779 return -ENODEV; 780 781 if (!ds->ops->get_mac_eee) 782 return -EOPNOTSUPP; 783 784 ret = ds->ops->get_mac_eee(ds, dp->index, e); 785 if (ret) 786 return ret; 787 788 return phylink_ethtool_get_eee(dp->pl, e); 789 } 790 791 static int dsa_slave_get_link_ksettings(struct net_device *dev, 792 struct ethtool_link_ksettings *cmd) 793 { 794 struct dsa_port *dp = dsa_slave_to_port(dev); 795 796 return phylink_ethtool_ksettings_get(dp->pl, cmd); 797 } 798 799 static int dsa_slave_set_link_ksettings(struct net_device *dev, 800 const struct ethtool_link_ksettings *cmd) 801 { 802 struct dsa_port *dp = dsa_slave_to_port(dev); 803 804 return phylink_ethtool_ksettings_set(dp->pl, cmd); 805 } 806 807 static void dsa_slave_get_pauseparam(struct net_device *dev, 808 struct ethtool_pauseparam *pause) 809 { 810 struct dsa_port *dp = dsa_slave_to_port(dev); 811 812 phylink_ethtool_get_pauseparam(dp->pl, pause); 813 } 814 815 static int dsa_slave_set_pauseparam(struct net_device *dev, 816 struct ethtool_pauseparam *pause) 817 { 818 struct dsa_port *dp = dsa_slave_to_port(dev); 819 820 return phylink_ethtool_set_pauseparam(dp->pl, pause); 821 } 822 823 #ifdef CONFIG_NET_POLL_CONTROLLER 824 static int dsa_slave_netpoll_setup(struct net_device *dev, 825 struct netpoll_info *ni) 826 { 827 struct net_device *master = dsa_slave_to_master(dev); 828 struct dsa_slave_priv *p = netdev_priv(dev); 829 struct netpoll *netpoll; 830 int err = 0; 831 832 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 833 if (!netpoll) 834 return -ENOMEM; 835 836 err = __netpoll_setup(netpoll, master); 837 if (err) { 838 kfree(netpoll); 839 goto out; 840 } 841 842 p->netpoll = netpoll; 843 out: 844 return err; 845 } 846 847 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 848 { 849 struct dsa_slave_priv *p = netdev_priv(dev); 850 struct netpoll *netpoll = p->netpoll; 851 852 if (!netpoll) 853 return; 854 855 p->netpoll = NULL; 856 857 __netpoll_free(netpoll); 858 } 859 860 static void dsa_slave_poll_controller(struct net_device *dev) 861 { 862 } 863 #endif 864 865 static int dsa_slave_get_phys_port_name(struct net_device *dev, 866 char *name, size_t len) 867 { 868 struct dsa_port *dp = dsa_slave_to_port(dev); 869 870 /* For non-legacy ports, devlink is used and it takes 871 * care of the name generation. This ndo implementation 872 * should be removed with legacy support. 873 */ 874 if (dp->ds->devlink) 875 return -EOPNOTSUPP; 876 877 if (snprintf(name, len, "p%d", dp->index) >= len) 878 return -EINVAL; 879 880 return 0; 881 } 882 883 static struct dsa_mall_tc_entry * 884 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 885 { 886 struct dsa_slave_priv *p = netdev_priv(dev); 887 struct dsa_mall_tc_entry *mall_tc_entry; 888 889 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 890 if (mall_tc_entry->cookie == cookie) 891 return mall_tc_entry; 892 893 return NULL; 894 } 895 896 static int 897 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 898 struct tc_cls_matchall_offload *cls, 899 bool ingress) 900 { 901 struct dsa_port *dp = dsa_slave_to_port(dev); 902 struct dsa_slave_priv *p = netdev_priv(dev); 903 struct dsa_mall_mirror_tc_entry *mirror; 904 struct dsa_mall_tc_entry *mall_tc_entry; 905 struct dsa_switch *ds = dp->ds; 906 struct flow_action_entry *act; 907 struct dsa_port *to_dp; 908 int err; 909 910 if (!ds->ops->port_mirror_add) 911 return -EOPNOTSUPP; 912 913 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 914 cls->common.extack)) 915 return -EOPNOTSUPP; 916 917 act = &cls->rule->action.entries[0]; 918 919 if (!act->dev) 920 return -EINVAL; 921 922 if (!dsa_slave_dev_check(act->dev)) 923 return -EOPNOTSUPP; 924 925 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 926 if (!mall_tc_entry) 927 return -ENOMEM; 928 929 mall_tc_entry->cookie = cls->cookie; 930 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 931 mirror = &mall_tc_entry->mirror; 932 933 to_dp = dsa_slave_to_port(act->dev); 934 935 mirror->to_local_port = to_dp->index; 936 mirror->ingress = ingress; 937 938 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); 939 if (err) { 940 kfree(mall_tc_entry); 941 return err; 942 } 943 944 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 945 946 return err; 947 } 948 949 static int 950 dsa_slave_add_cls_matchall_police(struct net_device *dev, 951 struct tc_cls_matchall_offload *cls, 952 bool ingress) 953 { 954 struct netlink_ext_ack *extack = cls->common.extack; 955 struct dsa_port *dp = dsa_slave_to_port(dev); 956 struct dsa_slave_priv *p = netdev_priv(dev); 957 struct dsa_mall_policer_tc_entry *policer; 958 struct dsa_mall_tc_entry *mall_tc_entry; 959 struct dsa_switch *ds = dp->ds; 960 struct flow_action_entry *act; 961 int err; 962 963 if (!ds->ops->port_policer_add) { 964 NL_SET_ERR_MSG_MOD(extack, 965 "Policing offload not implemented"); 966 return -EOPNOTSUPP; 967 } 968 969 if (!ingress) { 970 NL_SET_ERR_MSG_MOD(extack, 971 "Only supported on ingress qdisc"); 972 return -EOPNOTSUPP; 973 } 974 975 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 976 cls->common.extack)) 977 return -EOPNOTSUPP; 978 979 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 980 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 981 NL_SET_ERR_MSG_MOD(extack, 982 "Only one port policer allowed"); 983 return -EEXIST; 984 } 985 } 986 987 act = &cls->rule->action.entries[0]; 988 989 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 990 if (!mall_tc_entry) 991 return -ENOMEM; 992 993 mall_tc_entry->cookie = cls->cookie; 994 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 995 policer = &mall_tc_entry->policer; 996 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 997 policer->burst = act->police.burst; 998 999 err = ds->ops->port_policer_add(ds, dp->index, policer); 1000 if (err) { 1001 kfree(mall_tc_entry); 1002 return err; 1003 } 1004 1005 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1006 1007 return err; 1008 } 1009 1010 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1011 struct tc_cls_matchall_offload *cls, 1012 bool ingress) 1013 { 1014 int err = -EOPNOTSUPP; 1015 1016 if (cls->common.protocol == htons(ETH_P_ALL) && 1017 flow_offload_has_one_action(&cls->rule->action) && 1018 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1019 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1020 else if (flow_offload_has_one_action(&cls->rule->action) && 1021 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1022 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1023 1024 return err; 1025 } 1026 1027 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1028 struct tc_cls_matchall_offload *cls) 1029 { 1030 struct dsa_port *dp = dsa_slave_to_port(dev); 1031 struct dsa_mall_tc_entry *mall_tc_entry; 1032 struct dsa_switch *ds = dp->ds; 1033 1034 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1035 if (!mall_tc_entry) 1036 return; 1037 1038 list_del(&mall_tc_entry->list); 1039 1040 switch (mall_tc_entry->type) { 1041 case DSA_PORT_MALL_MIRROR: 1042 if (ds->ops->port_mirror_del) 1043 ds->ops->port_mirror_del(ds, dp->index, 1044 &mall_tc_entry->mirror); 1045 break; 1046 case DSA_PORT_MALL_POLICER: 1047 if (ds->ops->port_policer_del) 1048 ds->ops->port_policer_del(ds, dp->index); 1049 break; 1050 default: 1051 WARN_ON(1); 1052 } 1053 1054 kfree(mall_tc_entry); 1055 } 1056 1057 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1058 struct tc_cls_matchall_offload *cls, 1059 bool ingress) 1060 { 1061 if (cls->common.chain_index) 1062 return -EOPNOTSUPP; 1063 1064 switch (cls->command) { 1065 case TC_CLSMATCHALL_REPLACE: 1066 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1067 case TC_CLSMATCHALL_DESTROY: 1068 dsa_slave_del_cls_matchall(dev, cls); 1069 return 0; 1070 default: 1071 return -EOPNOTSUPP; 1072 } 1073 } 1074 1075 static int dsa_slave_add_cls_flower(struct net_device *dev, 1076 struct flow_cls_offload *cls, 1077 bool ingress) 1078 { 1079 struct dsa_port *dp = dsa_slave_to_port(dev); 1080 struct dsa_switch *ds = dp->ds; 1081 int port = dp->index; 1082 1083 if (!ds->ops->cls_flower_add) 1084 return -EOPNOTSUPP; 1085 1086 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1087 } 1088 1089 static int dsa_slave_del_cls_flower(struct net_device *dev, 1090 struct flow_cls_offload *cls, 1091 bool ingress) 1092 { 1093 struct dsa_port *dp = dsa_slave_to_port(dev); 1094 struct dsa_switch *ds = dp->ds; 1095 int port = dp->index; 1096 1097 if (!ds->ops->cls_flower_del) 1098 return -EOPNOTSUPP; 1099 1100 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1101 } 1102 1103 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1104 struct flow_cls_offload *cls, 1105 bool ingress) 1106 { 1107 struct dsa_port *dp = dsa_slave_to_port(dev); 1108 struct dsa_switch *ds = dp->ds; 1109 int port = dp->index; 1110 1111 if (!ds->ops->cls_flower_stats) 1112 return -EOPNOTSUPP; 1113 1114 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1115 } 1116 1117 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1118 struct flow_cls_offload *cls, 1119 bool ingress) 1120 { 1121 switch (cls->command) { 1122 case FLOW_CLS_REPLACE: 1123 return dsa_slave_add_cls_flower(dev, cls, ingress); 1124 case FLOW_CLS_DESTROY: 1125 return dsa_slave_del_cls_flower(dev, cls, ingress); 1126 case FLOW_CLS_STATS: 1127 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1128 default: 1129 return -EOPNOTSUPP; 1130 } 1131 } 1132 1133 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1134 void *cb_priv, bool ingress) 1135 { 1136 struct net_device *dev = cb_priv; 1137 1138 if (!tc_can_offload(dev)) 1139 return -EOPNOTSUPP; 1140 1141 switch (type) { 1142 case TC_SETUP_CLSMATCHALL: 1143 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1144 case TC_SETUP_CLSFLOWER: 1145 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1146 default: 1147 return -EOPNOTSUPP; 1148 } 1149 } 1150 1151 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1152 void *type_data, void *cb_priv) 1153 { 1154 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1155 } 1156 1157 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1158 void *type_data, void *cb_priv) 1159 { 1160 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1161 } 1162 1163 static LIST_HEAD(dsa_slave_block_cb_list); 1164 1165 static int dsa_slave_setup_tc_block(struct net_device *dev, 1166 struct flow_block_offload *f) 1167 { 1168 struct flow_block_cb *block_cb; 1169 flow_setup_cb_t *cb; 1170 1171 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1172 cb = dsa_slave_setup_tc_block_cb_ig; 1173 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1174 cb = dsa_slave_setup_tc_block_cb_eg; 1175 else 1176 return -EOPNOTSUPP; 1177 1178 f->driver_block_list = &dsa_slave_block_cb_list; 1179 1180 switch (f->command) { 1181 case FLOW_BLOCK_BIND: 1182 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1183 return -EBUSY; 1184 1185 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1186 if (IS_ERR(block_cb)) 1187 return PTR_ERR(block_cb); 1188 1189 flow_block_cb_add(block_cb, f); 1190 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1191 return 0; 1192 case FLOW_BLOCK_UNBIND: 1193 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1194 if (!block_cb) 1195 return -ENOENT; 1196 1197 flow_block_cb_remove(block_cb, f); 1198 list_del(&block_cb->driver_list); 1199 return 0; 1200 default: 1201 return -EOPNOTSUPP; 1202 } 1203 } 1204 1205 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1206 void *type_data) 1207 { 1208 struct dsa_port *dp = dsa_slave_to_port(dev); 1209 struct dsa_switch *ds = dp->ds; 1210 1211 if (type == TC_SETUP_BLOCK) 1212 return dsa_slave_setup_tc_block(dev, type_data); 1213 1214 if (!ds->ops->port_setup_tc) 1215 return -EOPNOTSUPP; 1216 1217 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1218 } 1219 1220 static void dsa_slave_get_stats64(struct net_device *dev, 1221 struct rtnl_link_stats64 *stats) 1222 { 1223 struct dsa_slave_priv *p = netdev_priv(dev); 1224 1225 netdev_stats_to_stats64(stats, &dev->stats); 1226 dev_fetch_sw_netstats(stats, p->stats64); 1227 } 1228 1229 static int dsa_slave_get_rxnfc(struct net_device *dev, 1230 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1231 { 1232 struct dsa_port *dp = dsa_slave_to_port(dev); 1233 struct dsa_switch *ds = dp->ds; 1234 1235 if (!ds->ops->get_rxnfc) 1236 return -EOPNOTSUPP; 1237 1238 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1239 } 1240 1241 static int dsa_slave_set_rxnfc(struct net_device *dev, 1242 struct ethtool_rxnfc *nfc) 1243 { 1244 struct dsa_port *dp = dsa_slave_to_port(dev); 1245 struct dsa_switch *ds = dp->ds; 1246 1247 if (!ds->ops->set_rxnfc) 1248 return -EOPNOTSUPP; 1249 1250 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1251 } 1252 1253 static int dsa_slave_get_ts_info(struct net_device *dev, 1254 struct ethtool_ts_info *ts) 1255 { 1256 struct dsa_slave_priv *p = netdev_priv(dev); 1257 struct dsa_switch *ds = p->dp->ds; 1258 1259 if (!ds->ops->get_ts_info) 1260 return -EOPNOTSUPP; 1261 1262 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1263 } 1264 1265 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1266 u16 vid) 1267 { 1268 struct net_device *master = dsa_slave_to_master(dev); 1269 struct dsa_port *dp = dsa_slave_to_port(dev); 1270 struct switchdev_obj_port_vlan vlan = { 1271 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1272 .vid_begin = vid, 1273 .vid_end = vid, 1274 /* This API only allows programming tagged, non-PVID VIDs */ 1275 .flags = 0, 1276 }; 1277 struct switchdev_trans trans; 1278 int ret; 1279 1280 /* User port... */ 1281 trans.ph_prepare = true; 1282 ret = dsa_port_vlan_add(dp, &vlan, &trans); 1283 if (ret) 1284 return ret; 1285 1286 trans.ph_prepare = false; 1287 ret = dsa_port_vlan_add(dp, &vlan, &trans); 1288 if (ret) 1289 return ret; 1290 1291 /* And CPU port... */ 1292 trans.ph_prepare = true; 1293 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &trans); 1294 if (ret) 1295 return ret; 1296 1297 trans.ph_prepare = false; 1298 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &trans); 1299 if (ret) 1300 return ret; 1301 1302 return vlan_vid_add(master, proto, vid); 1303 } 1304 1305 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1306 u16 vid) 1307 { 1308 struct net_device *master = dsa_slave_to_master(dev); 1309 struct dsa_port *dp = dsa_slave_to_port(dev); 1310 struct switchdev_obj_port_vlan vlan = { 1311 .vid_begin = vid, 1312 .vid_end = vid, 1313 /* This API only allows programming tagged, non-PVID VIDs */ 1314 .flags = 0, 1315 }; 1316 int err; 1317 1318 /* Do not deprogram the CPU port as it may be shared with other user 1319 * ports which can be members of this VLAN as well. 1320 */ 1321 err = dsa_port_vlan_del(dp, &vlan); 1322 if (err) 1323 return err; 1324 1325 vlan_vid_del(master, proto, vid); 1326 1327 return 0; 1328 } 1329 1330 struct dsa_hw_port { 1331 struct list_head list; 1332 struct net_device *dev; 1333 int old_mtu; 1334 }; 1335 1336 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1337 { 1338 const struct dsa_hw_port *p; 1339 int err; 1340 1341 list_for_each_entry(p, hw_port_list, list) { 1342 if (p->dev->mtu == mtu) 1343 continue; 1344 1345 err = dev_set_mtu(p->dev, mtu); 1346 if (err) 1347 goto rollback; 1348 } 1349 1350 return 0; 1351 1352 rollback: 1353 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1354 if (p->dev->mtu == p->old_mtu) 1355 continue; 1356 1357 if (dev_set_mtu(p->dev, p->old_mtu)) 1358 netdev_err(p->dev, "Failed to restore MTU\n"); 1359 } 1360 1361 return err; 1362 } 1363 1364 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1365 { 1366 struct dsa_hw_port *p, *n; 1367 1368 list_for_each_entry_safe(p, n, hw_port_list, list) 1369 kfree(p); 1370 } 1371 1372 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1373 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1374 { 1375 struct list_head hw_port_list; 1376 struct dsa_switch_tree *dst; 1377 int min_mtu = ETH_MAX_MTU; 1378 struct dsa_port *other_dp; 1379 int err; 1380 1381 if (!dp->ds->mtu_enforcement_ingress) 1382 return; 1383 1384 if (!dp->bridge_dev) 1385 return; 1386 1387 INIT_LIST_HEAD(&hw_port_list); 1388 1389 /* Populate the list of ports that are part of the same bridge 1390 * as the newly added/modified port 1391 */ 1392 list_for_each_entry(dst, &dsa_tree_list, list) { 1393 list_for_each_entry(other_dp, &dst->ports, list) { 1394 struct dsa_hw_port *hw_port; 1395 struct net_device *slave; 1396 1397 if (other_dp->type != DSA_PORT_TYPE_USER) 1398 continue; 1399 1400 if (other_dp->bridge_dev != dp->bridge_dev) 1401 continue; 1402 1403 if (!other_dp->ds->mtu_enforcement_ingress) 1404 continue; 1405 1406 slave = other_dp->slave; 1407 1408 if (min_mtu > slave->mtu) 1409 min_mtu = slave->mtu; 1410 1411 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1412 if (!hw_port) 1413 goto out; 1414 1415 hw_port->dev = slave; 1416 hw_port->old_mtu = slave->mtu; 1417 1418 list_add(&hw_port->list, &hw_port_list); 1419 } 1420 } 1421 1422 /* Attempt to configure the entire hardware bridge to the newly added 1423 * interface's MTU first, regardless of whether the intention of the 1424 * user was to raise or lower it. 1425 */ 1426 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1427 if (!err) 1428 goto out; 1429 1430 /* Clearly that didn't work out so well, so just set the minimum MTU on 1431 * all hardware bridge ports now. If this fails too, then all ports will 1432 * still have their old MTU rolled back anyway. 1433 */ 1434 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1435 1436 out: 1437 dsa_hw_port_list_free(&hw_port_list); 1438 } 1439 1440 static int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1441 { 1442 struct net_device *master = dsa_slave_to_master(dev); 1443 struct dsa_port *dp = dsa_slave_to_port(dev); 1444 struct dsa_slave_priv *p = netdev_priv(dev); 1445 struct dsa_switch *ds = p->dp->ds; 1446 struct dsa_port *cpu_dp; 1447 int port = p->dp->index; 1448 int largest_mtu = 0; 1449 int new_master_mtu; 1450 int old_master_mtu; 1451 int mtu_limit; 1452 int cpu_mtu; 1453 int err, i; 1454 1455 if (!ds->ops->port_change_mtu) 1456 return -EOPNOTSUPP; 1457 1458 for (i = 0; i < ds->num_ports; i++) { 1459 int slave_mtu; 1460 1461 if (!dsa_is_user_port(ds, i)) 1462 continue; 1463 1464 /* During probe, this function will be called for each slave 1465 * device, while not all of them have been allocated. That's 1466 * ok, it doesn't change what the maximum is, so ignore it. 1467 */ 1468 if (!dsa_to_port(ds, i)->slave) 1469 continue; 1470 1471 /* Pretend that we already applied the setting, which we 1472 * actually haven't (still haven't done all integrity checks) 1473 */ 1474 if (i == port) 1475 slave_mtu = new_mtu; 1476 else 1477 slave_mtu = dsa_to_port(ds, i)->slave->mtu; 1478 1479 if (largest_mtu < slave_mtu) 1480 largest_mtu = slave_mtu; 1481 } 1482 1483 cpu_dp = dsa_to_port(ds, port)->cpu_dp; 1484 1485 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1486 old_master_mtu = master->mtu; 1487 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead; 1488 if (new_master_mtu > mtu_limit) 1489 return -ERANGE; 1490 1491 /* If the master MTU isn't over limit, there's no need to check the CPU 1492 * MTU, since that surely isn't either. 1493 */ 1494 cpu_mtu = largest_mtu; 1495 1496 /* Start applying stuff */ 1497 if (new_master_mtu != old_master_mtu) { 1498 err = dev_set_mtu(master, new_master_mtu); 1499 if (err < 0) 1500 goto out_master_failed; 1501 1502 /* We only need to propagate the MTU of the CPU port to 1503 * upstream switches. 1504 */ 1505 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true); 1506 if (err) 1507 goto out_cpu_failed; 1508 } 1509 1510 err = dsa_port_mtu_change(dp, new_mtu, false); 1511 if (err) 1512 goto out_port_failed; 1513 1514 dev->mtu = new_mtu; 1515 1516 dsa_bridge_mtu_normalization(dp); 1517 1518 return 0; 1519 1520 out_port_failed: 1521 if (new_master_mtu != old_master_mtu) 1522 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1523 cpu_dp->tag_ops->overhead, 1524 true); 1525 out_cpu_failed: 1526 if (new_master_mtu != old_master_mtu) 1527 dev_set_mtu(master, old_master_mtu); 1528 out_master_failed: 1529 return err; 1530 } 1531 1532 static const struct ethtool_ops dsa_slave_ethtool_ops = { 1533 .get_drvinfo = dsa_slave_get_drvinfo, 1534 .get_regs_len = dsa_slave_get_regs_len, 1535 .get_regs = dsa_slave_get_regs, 1536 .nway_reset = dsa_slave_nway_reset, 1537 .get_link = ethtool_op_get_link, 1538 .get_eeprom_len = dsa_slave_get_eeprom_len, 1539 .get_eeprom = dsa_slave_get_eeprom, 1540 .set_eeprom = dsa_slave_set_eeprom, 1541 .get_strings = dsa_slave_get_strings, 1542 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 1543 .get_sset_count = dsa_slave_get_sset_count, 1544 .set_wol = dsa_slave_set_wol, 1545 .get_wol = dsa_slave_get_wol, 1546 .set_eee = dsa_slave_set_eee, 1547 .get_eee = dsa_slave_get_eee, 1548 .get_link_ksettings = dsa_slave_get_link_ksettings, 1549 .set_link_ksettings = dsa_slave_set_link_ksettings, 1550 .get_pauseparam = dsa_slave_get_pauseparam, 1551 .set_pauseparam = dsa_slave_set_pauseparam, 1552 .get_rxnfc = dsa_slave_get_rxnfc, 1553 .set_rxnfc = dsa_slave_set_rxnfc, 1554 .get_ts_info = dsa_slave_get_ts_info, 1555 }; 1556 1557 /* legacy way, bypassing the bridge *****************************************/ 1558 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 1559 struct net_device *dev, 1560 const unsigned char *addr, u16 vid, 1561 u16 flags, 1562 struct netlink_ext_ack *extack) 1563 { 1564 struct dsa_port *dp = dsa_slave_to_port(dev); 1565 1566 return dsa_port_fdb_add(dp, addr, vid); 1567 } 1568 1569 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 1570 struct net_device *dev, 1571 const unsigned char *addr, u16 vid) 1572 { 1573 struct dsa_port *dp = dsa_slave_to_port(dev); 1574 1575 return dsa_port_fdb_del(dp, addr, vid); 1576 } 1577 1578 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) 1579 { 1580 struct dsa_port *dp = dsa_slave_to_port(dev); 1581 1582 return dp->ds->devlink ? &dp->devlink_port : NULL; 1583 } 1584 1585 static const struct net_device_ops dsa_slave_netdev_ops = { 1586 .ndo_open = dsa_slave_open, 1587 .ndo_stop = dsa_slave_close, 1588 .ndo_start_xmit = dsa_slave_xmit, 1589 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 1590 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 1591 .ndo_set_mac_address = dsa_slave_set_mac_address, 1592 .ndo_fdb_add = dsa_legacy_fdb_add, 1593 .ndo_fdb_del = dsa_legacy_fdb_del, 1594 .ndo_fdb_dump = dsa_slave_fdb_dump, 1595 .ndo_do_ioctl = dsa_slave_ioctl, 1596 .ndo_get_iflink = dsa_slave_get_iflink, 1597 #ifdef CONFIG_NET_POLL_CONTROLLER 1598 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 1599 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 1600 .ndo_poll_controller = dsa_slave_poll_controller, 1601 #endif 1602 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 1603 .ndo_setup_tc = dsa_slave_setup_tc, 1604 .ndo_get_stats64 = dsa_slave_get_stats64, 1605 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id, 1606 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 1607 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 1608 .ndo_get_devlink_port = dsa_slave_get_devlink_port, 1609 .ndo_change_mtu = dsa_slave_change_mtu, 1610 }; 1611 1612 static struct device_type dsa_type = { 1613 .name = "dsa", 1614 }; 1615 1616 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 1617 { 1618 const struct dsa_port *dp = dsa_to_port(ds, port); 1619 1620 if (dp->pl) 1621 phylink_mac_change(dp->pl, up); 1622 } 1623 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 1624 1625 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 1626 struct phylink_link_state *state) 1627 { 1628 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1629 struct dsa_switch *ds = dp->ds; 1630 1631 /* No need to check that this operation is valid, the callback would 1632 * not be called if it was not. 1633 */ 1634 ds->ops->phylink_fixed_state(ds, dp->index, state); 1635 } 1636 1637 /* slave device setup *******************************************************/ 1638 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) 1639 { 1640 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1641 struct dsa_switch *ds = dp->ds; 1642 1643 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 1644 if (!slave_dev->phydev) { 1645 netdev_err(slave_dev, "no phy at %d\n", addr); 1646 return -ENODEV; 1647 } 1648 1649 return phylink_connect_phy(dp->pl, slave_dev->phydev); 1650 } 1651 1652 static int dsa_slave_phy_setup(struct net_device *slave_dev) 1653 { 1654 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1655 struct device_node *port_dn = dp->dn; 1656 struct dsa_switch *ds = dp->ds; 1657 phy_interface_t mode; 1658 u32 phy_flags = 0; 1659 int ret; 1660 1661 ret = of_get_phy_mode(port_dn, &mode); 1662 if (ret) 1663 mode = PHY_INTERFACE_MODE_NA; 1664 1665 dp->pl_config.dev = &slave_dev->dev; 1666 dp->pl_config.type = PHYLINK_NETDEV; 1667 1668 /* The get_fixed_state callback takes precedence over polling the 1669 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 1670 * this if the switch provides such a callback. 1671 */ 1672 if (ds->ops->phylink_fixed_state) { 1673 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 1674 dp->pl_config.poll_fixed_state = true; 1675 } 1676 1677 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode, 1678 &dsa_port_phylink_mac_ops); 1679 if (IS_ERR(dp->pl)) { 1680 netdev_err(slave_dev, 1681 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 1682 return PTR_ERR(dp->pl); 1683 } 1684 1685 if (ds->ops->get_phy_flags) 1686 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 1687 1688 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 1689 if (ret == -ENODEV && ds->slave_mii_bus) { 1690 /* We could not connect to a designated PHY or SFP, so try to 1691 * use the switch internal MDIO bus instead 1692 */ 1693 ret = dsa_slave_phy_connect(slave_dev, dp->index); 1694 if (ret) { 1695 netdev_err(slave_dev, 1696 "failed to connect to port %d: %d\n", 1697 dp->index, ret); 1698 phylink_destroy(dp->pl); 1699 return ret; 1700 } 1701 } 1702 1703 return ret; 1704 } 1705 1706 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1707 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1708 struct netdev_queue *txq, 1709 void *_unused) 1710 { 1711 lockdep_set_class(&txq->_xmit_lock, 1712 &dsa_slave_netdev_xmit_lock_key); 1713 } 1714 1715 int dsa_slave_suspend(struct net_device *slave_dev) 1716 { 1717 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1718 1719 if (!netif_running(slave_dev)) 1720 return 0; 1721 1722 netif_device_detach(slave_dev); 1723 1724 rtnl_lock(); 1725 phylink_stop(dp->pl); 1726 rtnl_unlock(); 1727 1728 return 0; 1729 } 1730 1731 int dsa_slave_resume(struct net_device *slave_dev) 1732 { 1733 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1734 1735 if (!netif_running(slave_dev)) 1736 return 0; 1737 1738 netif_device_attach(slave_dev); 1739 1740 rtnl_lock(); 1741 phylink_start(dp->pl); 1742 rtnl_unlock(); 1743 1744 return 0; 1745 } 1746 1747 static void dsa_slave_notify(struct net_device *dev, unsigned long val) 1748 { 1749 struct net_device *master = dsa_slave_to_master(dev); 1750 struct dsa_port *dp = dsa_slave_to_port(dev); 1751 struct dsa_notifier_register_info rinfo = { 1752 .switch_number = dp->ds->index, 1753 .port_number = dp->index, 1754 .master = master, 1755 .info.dev = dev, 1756 }; 1757 1758 call_dsa_notifiers(val, dev, &rinfo.info); 1759 } 1760 1761 int dsa_slave_create(struct dsa_port *port) 1762 { 1763 const struct dsa_port *cpu_dp = port->cpu_dp; 1764 struct net_device *master = cpu_dp->master; 1765 struct dsa_switch *ds = port->ds; 1766 const char *name = port->name; 1767 struct net_device *slave_dev; 1768 struct dsa_slave_priv *p; 1769 int ret; 1770 1771 if (!ds->num_tx_queues) 1772 ds->num_tx_queues = 1; 1773 1774 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 1775 NET_NAME_UNKNOWN, ether_setup, 1776 ds->num_tx_queues, 1); 1777 if (slave_dev == NULL) 1778 return -ENOMEM; 1779 1780 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1781 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del) 1782 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1783 slave_dev->hw_features |= NETIF_F_HW_TC; 1784 slave_dev->features |= NETIF_F_LLTX; 1785 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1786 if (!IS_ERR_OR_NULL(port->mac)) 1787 ether_addr_copy(slave_dev->dev_addr, port->mac); 1788 else 1789 eth_hw_addr_inherit(slave_dev, master); 1790 slave_dev->priv_flags |= IFF_NO_QUEUE; 1791 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1792 if (ds->ops->port_max_mtu) 1793 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 1794 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1795 1796 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1797 NULL); 1798 1799 SET_NETDEV_DEV(slave_dev, port->ds->dev); 1800 slave_dev->dev.of_node = port->dn; 1801 slave_dev->vlan_features = master->vlan_features; 1802 1803 p = netdev_priv(slave_dev); 1804 p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1805 if (!p->stats64) { 1806 free_netdev(slave_dev); 1807 return -ENOMEM; 1808 } 1809 1810 ret = gro_cells_init(&p->gcells, slave_dev); 1811 if (ret) 1812 goto out_free; 1813 1814 p->dp = port; 1815 INIT_LIST_HEAD(&p->mall_tc_list); 1816 p->xmit = cpu_dp->tag_ops->xmit; 1817 port->slave = slave_dev; 1818 1819 rtnl_lock(); 1820 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 1821 rtnl_unlock(); 1822 if (ret && ret != -EOPNOTSUPP) 1823 dev_warn(ds->dev, "nonfatal error %d setting MTU on port %d\n", 1824 ret, port->index); 1825 1826 netif_carrier_off(slave_dev); 1827 1828 ret = dsa_slave_phy_setup(slave_dev); 1829 if (ret) { 1830 netdev_err(slave_dev, 1831 "error %d setting up PHY for tree %d, switch %d, port %d\n", 1832 ret, ds->dst->index, ds->index, port->index); 1833 goto out_gcells; 1834 } 1835 1836 dsa_slave_notify(slave_dev, DSA_PORT_REGISTER); 1837 1838 rtnl_lock(); 1839 1840 ret = register_netdevice(slave_dev); 1841 if (ret) { 1842 netdev_err(master, "error %d registering interface %s\n", 1843 ret, slave_dev->name); 1844 rtnl_unlock(); 1845 goto out_phy; 1846 } 1847 1848 ret = netdev_upper_dev_link(master, slave_dev, NULL); 1849 1850 rtnl_unlock(); 1851 1852 if (ret) 1853 goto out_unregister; 1854 1855 return 0; 1856 1857 out_unregister: 1858 unregister_netdev(slave_dev); 1859 out_phy: 1860 rtnl_lock(); 1861 phylink_disconnect_phy(p->dp->pl); 1862 rtnl_unlock(); 1863 phylink_destroy(p->dp->pl); 1864 out_gcells: 1865 gro_cells_destroy(&p->gcells); 1866 out_free: 1867 free_percpu(p->stats64); 1868 free_netdev(slave_dev); 1869 port->slave = NULL; 1870 return ret; 1871 } 1872 1873 void dsa_slave_destroy(struct net_device *slave_dev) 1874 { 1875 struct net_device *master = dsa_slave_to_master(slave_dev); 1876 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1877 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1878 1879 netif_carrier_off(slave_dev); 1880 rtnl_lock(); 1881 netdev_upper_dev_unlink(master, slave_dev); 1882 unregister_netdevice(slave_dev); 1883 phylink_disconnect_phy(dp->pl); 1884 rtnl_unlock(); 1885 1886 dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER); 1887 phylink_destroy(dp->pl); 1888 gro_cells_destroy(&p->gcells); 1889 free_percpu(p->stats64); 1890 free_netdev(slave_dev); 1891 } 1892 1893 bool dsa_slave_dev_check(const struct net_device *dev) 1894 { 1895 return dev->netdev_ops == &dsa_slave_netdev_ops; 1896 } 1897 1898 static int dsa_slave_changeupper(struct net_device *dev, 1899 struct netdev_notifier_changeupper_info *info) 1900 { 1901 struct dsa_port *dp = dsa_slave_to_port(dev); 1902 int err = NOTIFY_DONE; 1903 1904 if (netif_is_bridge_master(info->upper_dev)) { 1905 if (info->linking) { 1906 err = dsa_port_bridge_join(dp, info->upper_dev); 1907 if (!err) 1908 dsa_bridge_mtu_normalization(dp); 1909 err = notifier_from_errno(err); 1910 } else { 1911 dsa_port_bridge_leave(dp, info->upper_dev); 1912 err = NOTIFY_OK; 1913 } 1914 } 1915 1916 return err; 1917 } 1918 1919 static int 1920 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 1921 struct netdev_notifier_changeupper_info *info) 1922 { 1923 struct netlink_ext_ack *ext_ack; 1924 struct net_device *slave; 1925 struct dsa_port *dp; 1926 1927 ext_ack = netdev_notifier_info_to_extack(&info->info); 1928 1929 if (!is_vlan_dev(dev)) 1930 return NOTIFY_DONE; 1931 1932 slave = vlan_dev_real_dev(dev); 1933 if (!dsa_slave_dev_check(slave)) 1934 return NOTIFY_DONE; 1935 1936 dp = dsa_slave_to_port(slave); 1937 if (!dp->bridge_dev) 1938 return NOTIFY_DONE; 1939 1940 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 1941 if (br_vlan_enabled(dp->bridge_dev) && 1942 netif_is_bridge_master(info->upper_dev) && info->linking) { 1943 NL_SET_ERR_MSG_MOD(ext_ack, 1944 "Cannot enslave VLAN device into VLAN aware bridge"); 1945 return notifier_from_errno(-EINVAL); 1946 } 1947 1948 return NOTIFY_DONE; 1949 } 1950 1951 static int 1952 dsa_slave_check_8021q_upper(struct net_device *dev, 1953 struct netdev_notifier_changeupper_info *info) 1954 { 1955 struct dsa_port *dp = dsa_slave_to_port(dev); 1956 struct net_device *br = dp->bridge_dev; 1957 struct bridge_vlan_info br_info; 1958 struct netlink_ext_ack *extack; 1959 int err = NOTIFY_DONE; 1960 u16 vid; 1961 1962 if (!br || !br_vlan_enabled(br)) 1963 return NOTIFY_DONE; 1964 1965 extack = netdev_notifier_info_to_extack(&info->info); 1966 vid = vlan_dev_vlan_id(info->upper_dev); 1967 1968 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 1969 * device, respectively the VID is not found, returning 1970 * 0 means success, which is a failure for us here. 1971 */ 1972 err = br_vlan_get_info(br, vid, &br_info); 1973 if (err == 0) { 1974 NL_SET_ERR_MSG_MOD(extack, 1975 "This VLAN is already configured by the bridge"); 1976 return notifier_from_errno(-EBUSY); 1977 } 1978 1979 return NOTIFY_DONE; 1980 } 1981 1982 static int dsa_slave_netdevice_event(struct notifier_block *nb, 1983 unsigned long event, void *ptr) 1984 { 1985 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1986 1987 switch (event) { 1988 case NETDEV_PRECHANGEUPPER: { 1989 struct netdev_notifier_changeupper_info *info = ptr; 1990 1991 if (!dsa_slave_dev_check(dev)) 1992 return dsa_prevent_bridging_8021q_upper(dev, ptr); 1993 1994 if (is_vlan_dev(info->upper_dev)) 1995 return dsa_slave_check_8021q_upper(dev, ptr); 1996 break; 1997 } 1998 case NETDEV_CHANGEUPPER: 1999 if (!dsa_slave_dev_check(dev)) 2000 return NOTIFY_DONE; 2001 2002 return dsa_slave_changeupper(dev, ptr); 2003 } 2004 2005 return NOTIFY_DONE; 2006 } 2007 2008 struct dsa_switchdev_event_work { 2009 struct work_struct work; 2010 struct switchdev_notifier_fdb_info fdb_info; 2011 struct net_device *dev; 2012 unsigned long event; 2013 }; 2014 2015 static void dsa_slave_switchdev_event_work(struct work_struct *work) 2016 { 2017 struct dsa_switchdev_event_work *switchdev_work = 2018 container_of(work, struct dsa_switchdev_event_work, work); 2019 struct net_device *dev = switchdev_work->dev; 2020 struct switchdev_notifier_fdb_info *fdb_info; 2021 struct dsa_port *dp = dsa_slave_to_port(dev); 2022 int err; 2023 2024 rtnl_lock(); 2025 switch (switchdev_work->event) { 2026 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2027 fdb_info = &switchdev_work->fdb_info; 2028 if (!fdb_info->added_by_user) 2029 break; 2030 2031 err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid); 2032 if (err) { 2033 netdev_dbg(dev, "fdb add failed err=%d\n", err); 2034 break; 2035 } 2036 fdb_info->offloaded = true; 2037 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev, 2038 &fdb_info->info, NULL); 2039 break; 2040 2041 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2042 fdb_info = &switchdev_work->fdb_info; 2043 if (!fdb_info->added_by_user) 2044 break; 2045 2046 err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid); 2047 if (err) { 2048 netdev_dbg(dev, "fdb del failed err=%d\n", err); 2049 dev_close(dev); 2050 } 2051 break; 2052 } 2053 rtnl_unlock(); 2054 2055 kfree(switchdev_work->fdb_info.addr); 2056 kfree(switchdev_work); 2057 dev_put(dev); 2058 } 2059 2060 static int 2061 dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work * 2062 switchdev_work, 2063 const struct switchdev_notifier_fdb_info * 2064 fdb_info) 2065 { 2066 memcpy(&switchdev_work->fdb_info, fdb_info, 2067 sizeof(switchdev_work->fdb_info)); 2068 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC); 2069 if (!switchdev_work->fdb_info.addr) 2070 return -ENOMEM; 2071 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr, 2072 fdb_info->addr); 2073 return 0; 2074 } 2075 2076 /* Called under rcu_read_lock() */ 2077 static int dsa_slave_switchdev_event(struct notifier_block *unused, 2078 unsigned long event, void *ptr) 2079 { 2080 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2081 struct dsa_switchdev_event_work *switchdev_work; 2082 int err; 2083 2084 if (event == SWITCHDEV_PORT_ATTR_SET) { 2085 err = switchdev_handle_port_attr_set(dev, ptr, 2086 dsa_slave_dev_check, 2087 dsa_slave_port_attr_set); 2088 return notifier_from_errno(err); 2089 } 2090 2091 if (!dsa_slave_dev_check(dev)) 2092 return NOTIFY_DONE; 2093 2094 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 2095 if (!switchdev_work) 2096 return NOTIFY_BAD; 2097 2098 INIT_WORK(&switchdev_work->work, 2099 dsa_slave_switchdev_event_work); 2100 switchdev_work->dev = dev; 2101 switchdev_work->event = event; 2102 2103 switch (event) { 2104 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2105 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2106 if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr)) 2107 goto err_fdb_work_init; 2108 dev_hold(dev); 2109 break; 2110 default: 2111 kfree(switchdev_work); 2112 return NOTIFY_DONE; 2113 } 2114 2115 dsa_schedule_work(&switchdev_work->work); 2116 return NOTIFY_OK; 2117 2118 err_fdb_work_init: 2119 kfree(switchdev_work); 2120 return NOTIFY_BAD; 2121 } 2122 2123 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 2124 unsigned long event, void *ptr) 2125 { 2126 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2127 int err; 2128 2129 switch (event) { 2130 case SWITCHDEV_PORT_OBJ_ADD: 2131 err = switchdev_handle_port_obj_add(dev, ptr, 2132 dsa_slave_dev_check, 2133 dsa_slave_port_obj_add); 2134 return notifier_from_errno(err); 2135 case SWITCHDEV_PORT_OBJ_DEL: 2136 err = switchdev_handle_port_obj_del(dev, ptr, 2137 dsa_slave_dev_check, 2138 dsa_slave_port_obj_del); 2139 return notifier_from_errno(err); 2140 case SWITCHDEV_PORT_ATTR_SET: 2141 err = switchdev_handle_port_attr_set(dev, ptr, 2142 dsa_slave_dev_check, 2143 dsa_slave_port_attr_set); 2144 return notifier_from_errno(err); 2145 } 2146 2147 return NOTIFY_DONE; 2148 } 2149 2150 static struct notifier_block dsa_slave_nb __read_mostly = { 2151 .notifier_call = dsa_slave_netdevice_event, 2152 }; 2153 2154 static struct notifier_block dsa_slave_switchdev_notifier = { 2155 .notifier_call = dsa_slave_switchdev_event, 2156 }; 2157 2158 static struct notifier_block dsa_slave_switchdev_blocking_notifier = { 2159 .notifier_call = dsa_slave_switchdev_blocking_event, 2160 }; 2161 2162 int dsa_slave_register_notifier(void) 2163 { 2164 struct notifier_block *nb; 2165 int err; 2166 2167 err = register_netdevice_notifier(&dsa_slave_nb); 2168 if (err) 2169 return err; 2170 2171 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 2172 if (err) 2173 goto err_switchdev_nb; 2174 2175 nb = &dsa_slave_switchdev_blocking_notifier; 2176 err = register_switchdev_blocking_notifier(nb); 2177 if (err) 2178 goto err_switchdev_blocking_nb; 2179 2180 return 0; 2181 2182 err_switchdev_blocking_nb: 2183 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2184 err_switchdev_nb: 2185 unregister_netdevice_notifier(&dsa_slave_nb); 2186 return err; 2187 } 2188 2189 void dsa_slave_unregister_notifier(void) 2190 { 2191 struct notifier_block *nb; 2192 int err; 2193 2194 nb = &dsa_slave_switchdev_blocking_notifier; 2195 err = unregister_switchdev_blocking_notifier(nb); 2196 if (err) 2197 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 2198 2199 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2200 if (err) 2201 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 2202 2203 err = unregister_netdevice_notifier(&dsa_slave_nb); 2204 if (err) 2205 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 2206 } 2207