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 { 273 struct dsa_port *dp = dsa_slave_to_port(dev); 274 int ret; 275 276 if (!dsa_port_offloads_netdev(dp, attr->orig_dev)) 277 return -EOPNOTSUPP; 278 279 switch (attr->id) { 280 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 281 ret = dsa_port_set_state(dp, attr->u.stp_state); 282 break; 283 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 284 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering); 285 break; 286 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 287 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 288 break; 289 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 290 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags); 291 break; 292 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 293 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags); 294 break; 295 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER: 296 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter); 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) 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 netlink_ext_ack *extack) 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 err; 336 337 if (!dsa_port_offloads_netdev(dp, obj->orig_dev)) 338 return -EOPNOTSUPP; 339 340 if (dsa_port_skip_vlan_configuration(dp)) { 341 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 342 return 0; 343 } 344 345 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 346 347 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 348 * the same VID. 349 */ 350 if (br_vlan_enabled(dp->bridge_dev)) { 351 rcu_read_lock(); 352 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan); 353 rcu_read_unlock(); 354 if (err) 355 return err; 356 } 357 358 err = dsa_port_vlan_add(dp, &vlan); 359 if (err) 360 return err; 361 362 /* We need the dedicated CPU port to be a member of the VLAN as well. 363 * Even though drivers often handle CPU membership in special ways, 364 * it doesn't make sense to program a PVID, so clear this flag. 365 */ 366 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 367 368 err = dsa_port_vlan_add(dp->cpu_dp, &vlan); 369 if (err) 370 return err; 371 372 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid); 373 } 374 375 static int dsa_slave_port_obj_add(struct net_device *dev, 376 const struct switchdev_obj *obj, 377 struct netlink_ext_ack *extack) 378 { 379 struct dsa_port *dp = dsa_slave_to_port(dev); 380 int err; 381 382 switch (obj->id) { 383 case SWITCHDEV_OBJ_ID_PORT_MDB: 384 if (!dsa_port_offloads_netdev(dp, obj->orig_dev)) 385 return -EOPNOTSUPP; 386 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 387 break; 388 case SWITCHDEV_OBJ_ID_HOST_MDB: 389 /* DSA can directly translate this to a normal MDB add, 390 * but on the CPU port. 391 */ 392 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 393 break; 394 case SWITCHDEV_OBJ_ID_PORT_VLAN: 395 err = dsa_slave_vlan_add(dev, obj, extack); 396 break; 397 default: 398 err = -EOPNOTSUPP; 399 break; 400 } 401 402 return err; 403 } 404 405 static int dsa_slave_vlan_del(struct net_device *dev, 406 const struct switchdev_obj *obj) 407 { 408 struct net_device *master = dsa_slave_to_master(dev); 409 struct dsa_port *dp = dsa_slave_to_port(dev); 410 struct switchdev_obj_port_vlan *vlan; 411 int err; 412 413 if (!dsa_port_offloads_netdev(dp, obj->orig_dev)) 414 return -EOPNOTSUPP; 415 416 if (dsa_port_skip_vlan_configuration(dp)) 417 return 0; 418 419 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 420 421 /* Do not deprogram the CPU port as it may be shared with other user 422 * ports which can be members of this VLAN as well. 423 */ 424 err = dsa_port_vlan_del(dp, vlan); 425 if (err) 426 return err; 427 428 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid); 429 430 return 0; 431 } 432 433 static int dsa_slave_port_obj_del(struct net_device *dev, 434 const struct switchdev_obj *obj) 435 { 436 struct dsa_port *dp = dsa_slave_to_port(dev); 437 int err; 438 439 switch (obj->id) { 440 case SWITCHDEV_OBJ_ID_PORT_MDB: 441 if (!dsa_port_offloads_netdev(dp, obj->orig_dev)) 442 return -EOPNOTSUPP; 443 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 444 break; 445 case SWITCHDEV_OBJ_ID_HOST_MDB: 446 /* DSA can directly translate this to a normal MDB add, 447 * but on the CPU port. 448 */ 449 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 450 break; 451 case SWITCHDEV_OBJ_ID_PORT_VLAN: 452 err = dsa_slave_vlan_del(dev, obj); 453 break; 454 default: 455 err = -EOPNOTSUPP; 456 break; 457 } 458 459 return err; 460 } 461 462 static int dsa_slave_get_port_parent_id(struct net_device *dev, 463 struct netdev_phys_item_id *ppid) 464 { 465 struct dsa_port *dp = dsa_slave_to_port(dev); 466 struct dsa_switch *ds = dp->ds; 467 struct dsa_switch_tree *dst = ds->dst; 468 469 /* For non-legacy ports, devlink is used and it takes 470 * care of the name generation. This ndo implementation 471 * should be removed with legacy support. 472 */ 473 if (dp->ds->devlink) 474 return -EOPNOTSUPP; 475 476 ppid->id_len = sizeof(dst->index); 477 memcpy(&ppid->id, &dst->index, ppid->id_len); 478 479 return 0; 480 } 481 482 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 483 struct sk_buff *skb) 484 { 485 #ifdef CONFIG_NET_POLL_CONTROLLER 486 struct dsa_slave_priv *p = netdev_priv(dev); 487 488 return netpoll_send_skb(p->netpoll, skb); 489 #else 490 BUG(); 491 return NETDEV_TX_OK; 492 #endif 493 } 494 495 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 496 struct sk_buff *skb) 497 { 498 struct dsa_switch *ds = p->dp->ds; 499 struct sk_buff *clone; 500 unsigned int type; 501 502 type = ptp_classify_raw(skb); 503 if (type == PTP_CLASS_NONE) 504 return; 505 506 if (!ds->ops->port_txtstamp) 507 return; 508 509 clone = skb_clone_sk(skb); 510 if (!clone) 511 return; 512 513 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) { 514 DSA_SKB_CB(skb)->clone = clone; 515 return; 516 } 517 518 kfree_skb(clone); 519 } 520 521 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 522 { 523 /* SKB for netpoll still need to be mangled with the protocol-specific 524 * tag to be successfully transmitted 525 */ 526 if (unlikely(netpoll_tx_running(dev))) 527 return dsa_slave_netpoll_send_skb(dev, skb); 528 529 /* Queue the SKB for transmission on the parent interface, but 530 * do not modify its EtherType 531 */ 532 skb->dev = dsa_slave_to_master(dev); 533 dev_queue_xmit(skb); 534 535 return NETDEV_TX_OK; 536 } 537 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 538 539 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) 540 { 541 int needed_headroom = dev->needed_headroom; 542 int needed_tailroom = dev->needed_tailroom; 543 544 /* For tail taggers, we need to pad short frames ourselves, to ensure 545 * that the tail tag does not fail at its role of being at the end of 546 * the packet, once the master interface pads the frame. Account for 547 * that pad length here, and pad later. 548 */ 549 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) 550 needed_tailroom += ETH_ZLEN - skb->len; 551 /* skb_headroom() returns unsigned int... */ 552 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); 553 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); 554 555 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) 556 /* No reallocation needed, yay! */ 557 return 0; 558 559 return pskb_expand_head(skb, needed_headroom, needed_tailroom, 560 GFP_ATOMIC); 561 } 562 563 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 564 { 565 struct dsa_slave_priv *p = netdev_priv(dev); 566 struct sk_buff *nskb; 567 568 dev_sw_netstats_tx_add(dev, 1, skb->len); 569 570 DSA_SKB_CB(skb)->clone = NULL; 571 572 /* Identify PTP protocol packets, clone them, and pass them to the 573 * switch driver 574 */ 575 dsa_skb_tx_timestamp(p, skb); 576 577 if (dsa_realloc_skb(skb, dev)) { 578 dev_kfree_skb_any(skb); 579 return NETDEV_TX_OK; 580 } 581 582 /* needed_tailroom should still be 'warm' in the cache line from 583 * dsa_realloc_skb(), which has also ensured that padding is safe. 584 */ 585 if (dev->needed_tailroom) 586 eth_skb_pad(skb); 587 588 /* Transmit function may have to reallocate the original SKB, 589 * in which case it must have freed it. Only free it here on error. 590 */ 591 nskb = p->xmit(skb, dev); 592 if (!nskb) { 593 kfree_skb(skb); 594 return NETDEV_TX_OK; 595 } 596 597 return dsa_enqueue_skb(nskb, dev); 598 } 599 600 /* ethtool operations *******************************************************/ 601 602 static void dsa_slave_get_drvinfo(struct net_device *dev, 603 struct ethtool_drvinfo *drvinfo) 604 { 605 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 606 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 607 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 608 } 609 610 static int dsa_slave_get_regs_len(struct net_device *dev) 611 { 612 struct dsa_port *dp = dsa_slave_to_port(dev); 613 struct dsa_switch *ds = dp->ds; 614 615 if (ds->ops->get_regs_len) 616 return ds->ops->get_regs_len(ds, dp->index); 617 618 return -EOPNOTSUPP; 619 } 620 621 static void 622 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 623 { 624 struct dsa_port *dp = dsa_slave_to_port(dev); 625 struct dsa_switch *ds = dp->ds; 626 627 if (ds->ops->get_regs) 628 ds->ops->get_regs(ds, dp->index, regs, _p); 629 } 630 631 static int dsa_slave_nway_reset(struct net_device *dev) 632 { 633 struct dsa_port *dp = dsa_slave_to_port(dev); 634 635 return phylink_ethtool_nway_reset(dp->pl); 636 } 637 638 static int dsa_slave_get_eeprom_len(struct net_device *dev) 639 { 640 struct dsa_port *dp = dsa_slave_to_port(dev); 641 struct dsa_switch *ds = dp->ds; 642 643 if (ds->cd && ds->cd->eeprom_len) 644 return ds->cd->eeprom_len; 645 646 if (ds->ops->get_eeprom_len) 647 return ds->ops->get_eeprom_len(ds); 648 649 return 0; 650 } 651 652 static int dsa_slave_get_eeprom(struct net_device *dev, 653 struct ethtool_eeprom *eeprom, u8 *data) 654 { 655 struct dsa_port *dp = dsa_slave_to_port(dev); 656 struct dsa_switch *ds = dp->ds; 657 658 if (ds->ops->get_eeprom) 659 return ds->ops->get_eeprom(ds, eeprom, data); 660 661 return -EOPNOTSUPP; 662 } 663 664 static int dsa_slave_set_eeprom(struct net_device *dev, 665 struct ethtool_eeprom *eeprom, u8 *data) 666 { 667 struct dsa_port *dp = dsa_slave_to_port(dev); 668 struct dsa_switch *ds = dp->ds; 669 670 if (ds->ops->set_eeprom) 671 return ds->ops->set_eeprom(ds, eeprom, data); 672 673 return -EOPNOTSUPP; 674 } 675 676 static void dsa_slave_get_strings(struct net_device *dev, 677 uint32_t stringset, uint8_t *data) 678 { 679 struct dsa_port *dp = dsa_slave_to_port(dev); 680 struct dsa_switch *ds = dp->ds; 681 682 if (stringset == ETH_SS_STATS) { 683 int len = ETH_GSTRING_LEN; 684 685 strncpy(data, "tx_packets", len); 686 strncpy(data + len, "tx_bytes", len); 687 strncpy(data + 2 * len, "rx_packets", len); 688 strncpy(data + 3 * len, "rx_bytes", len); 689 if (ds->ops->get_strings) 690 ds->ops->get_strings(ds, dp->index, stringset, 691 data + 4 * len); 692 } 693 } 694 695 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 696 struct ethtool_stats *stats, 697 uint64_t *data) 698 { 699 struct dsa_port *dp = dsa_slave_to_port(dev); 700 struct dsa_switch *ds = dp->ds; 701 struct pcpu_sw_netstats *s; 702 unsigned int start; 703 int i; 704 705 for_each_possible_cpu(i) { 706 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 707 708 s = per_cpu_ptr(dev->tstats, i); 709 do { 710 start = u64_stats_fetch_begin_irq(&s->syncp); 711 tx_packets = s->tx_packets; 712 tx_bytes = s->tx_bytes; 713 rx_packets = s->rx_packets; 714 rx_bytes = s->rx_bytes; 715 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 716 data[0] += tx_packets; 717 data[1] += tx_bytes; 718 data[2] += rx_packets; 719 data[3] += rx_bytes; 720 } 721 if (ds->ops->get_ethtool_stats) 722 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 723 } 724 725 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 726 { 727 struct dsa_port *dp = dsa_slave_to_port(dev); 728 struct dsa_switch *ds = dp->ds; 729 730 if (sset == ETH_SS_STATS) { 731 int count; 732 733 count = 4; 734 if (ds->ops->get_sset_count) 735 count += ds->ops->get_sset_count(ds, dp->index, sset); 736 737 return count; 738 } 739 740 return -EOPNOTSUPP; 741 } 742 743 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 744 { 745 struct dsa_port *dp = dsa_slave_to_port(dev); 746 struct dsa_switch *ds = dp->ds; 747 748 phylink_ethtool_get_wol(dp->pl, w); 749 750 if (ds->ops->get_wol) 751 ds->ops->get_wol(ds, dp->index, w); 752 } 753 754 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 755 { 756 struct dsa_port *dp = dsa_slave_to_port(dev); 757 struct dsa_switch *ds = dp->ds; 758 int ret = -EOPNOTSUPP; 759 760 phylink_ethtool_set_wol(dp->pl, w); 761 762 if (ds->ops->set_wol) 763 ret = ds->ops->set_wol(ds, dp->index, w); 764 765 return ret; 766 } 767 768 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 769 { 770 struct dsa_port *dp = dsa_slave_to_port(dev); 771 struct dsa_switch *ds = dp->ds; 772 int ret; 773 774 /* Port's PHY and MAC both need to be EEE capable */ 775 if (!dev->phydev || !dp->pl) 776 return -ENODEV; 777 778 if (!ds->ops->set_mac_eee) 779 return -EOPNOTSUPP; 780 781 ret = ds->ops->set_mac_eee(ds, dp->index, e); 782 if (ret) 783 return ret; 784 785 return phylink_ethtool_set_eee(dp->pl, e); 786 } 787 788 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 789 { 790 struct dsa_port *dp = dsa_slave_to_port(dev); 791 struct dsa_switch *ds = dp->ds; 792 int ret; 793 794 /* Port's PHY and MAC both need to be EEE capable */ 795 if (!dev->phydev || !dp->pl) 796 return -ENODEV; 797 798 if (!ds->ops->get_mac_eee) 799 return -EOPNOTSUPP; 800 801 ret = ds->ops->get_mac_eee(ds, dp->index, e); 802 if (ret) 803 return ret; 804 805 return phylink_ethtool_get_eee(dp->pl, e); 806 } 807 808 static int dsa_slave_get_link_ksettings(struct net_device *dev, 809 struct ethtool_link_ksettings *cmd) 810 { 811 struct dsa_port *dp = dsa_slave_to_port(dev); 812 813 return phylink_ethtool_ksettings_get(dp->pl, cmd); 814 } 815 816 static int dsa_slave_set_link_ksettings(struct net_device *dev, 817 const struct ethtool_link_ksettings *cmd) 818 { 819 struct dsa_port *dp = dsa_slave_to_port(dev); 820 821 return phylink_ethtool_ksettings_set(dp->pl, cmd); 822 } 823 824 static void dsa_slave_get_pauseparam(struct net_device *dev, 825 struct ethtool_pauseparam *pause) 826 { 827 struct dsa_port *dp = dsa_slave_to_port(dev); 828 829 phylink_ethtool_get_pauseparam(dp->pl, pause); 830 } 831 832 static int dsa_slave_set_pauseparam(struct net_device *dev, 833 struct ethtool_pauseparam *pause) 834 { 835 struct dsa_port *dp = dsa_slave_to_port(dev); 836 837 return phylink_ethtool_set_pauseparam(dp->pl, pause); 838 } 839 840 #ifdef CONFIG_NET_POLL_CONTROLLER 841 static int dsa_slave_netpoll_setup(struct net_device *dev, 842 struct netpoll_info *ni) 843 { 844 struct net_device *master = dsa_slave_to_master(dev); 845 struct dsa_slave_priv *p = netdev_priv(dev); 846 struct netpoll *netpoll; 847 int err = 0; 848 849 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 850 if (!netpoll) 851 return -ENOMEM; 852 853 err = __netpoll_setup(netpoll, master); 854 if (err) { 855 kfree(netpoll); 856 goto out; 857 } 858 859 p->netpoll = netpoll; 860 out: 861 return err; 862 } 863 864 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 865 { 866 struct dsa_slave_priv *p = netdev_priv(dev); 867 struct netpoll *netpoll = p->netpoll; 868 869 if (!netpoll) 870 return; 871 872 p->netpoll = NULL; 873 874 __netpoll_free(netpoll); 875 } 876 877 static void dsa_slave_poll_controller(struct net_device *dev) 878 { 879 } 880 #endif 881 882 static int dsa_slave_get_phys_port_name(struct net_device *dev, 883 char *name, size_t len) 884 { 885 struct dsa_port *dp = dsa_slave_to_port(dev); 886 887 /* For non-legacy ports, devlink is used and it takes 888 * care of the name generation. This ndo implementation 889 * should be removed with legacy support. 890 */ 891 if (dp->ds->devlink) 892 return -EOPNOTSUPP; 893 894 if (snprintf(name, len, "p%d", dp->index) >= len) 895 return -EINVAL; 896 897 return 0; 898 } 899 900 static struct dsa_mall_tc_entry * 901 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 902 { 903 struct dsa_slave_priv *p = netdev_priv(dev); 904 struct dsa_mall_tc_entry *mall_tc_entry; 905 906 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 907 if (mall_tc_entry->cookie == cookie) 908 return mall_tc_entry; 909 910 return NULL; 911 } 912 913 static int 914 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 915 struct tc_cls_matchall_offload *cls, 916 bool ingress) 917 { 918 struct dsa_port *dp = dsa_slave_to_port(dev); 919 struct dsa_slave_priv *p = netdev_priv(dev); 920 struct dsa_mall_mirror_tc_entry *mirror; 921 struct dsa_mall_tc_entry *mall_tc_entry; 922 struct dsa_switch *ds = dp->ds; 923 struct flow_action_entry *act; 924 struct dsa_port *to_dp; 925 int err; 926 927 if (!ds->ops->port_mirror_add) 928 return -EOPNOTSUPP; 929 930 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 931 cls->common.extack)) 932 return -EOPNOTSUPP; 933 934 act = &cls->rule->action.entries[0]; 935 936 if (!act->dev) 937 return -EINVAL; 938 939 if (!dsa_slave_dev_check(act->dev)) 940 return -EOPNOTSUPP; 941 942 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 943 if (!mall_tc_entry) 944 return -ENOMEM; 945 946 mall_tc_entry->cookie = cls->cookie; 947 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 948 mirror = &mall_tc_entry->mirror; 949 950 to_dp = dsa_slave_to_port(act->dev); 951 952 mirror->to_local_port = to_dp->index; 953 mirror->ingress = ingress; 954 955 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); 956 if (err) { 957 kfree(mall_tc_entry); 958 return err; 959 } 960 961 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 962 963 return err; 964 } 965 966 static int 967 dsa_slave_add_cls_matchall_police(struct net_device *dev, 968 struct tc_cls_matchall_offload *cls, 969 bool ingress) 970 { 971 struct netlink_ext_ack *extack = cls->common.extack; 972 struct dsa_port *dp = dsa_slave_to_port(dev); 973 struct dsa_slave_priv *p = netdev_priv(dev); 974 struct dsa_mall_policer_tc_entry *policer; 975 struct dsa_mall_tc_entry *mall_tc_entry; 976 struct dsa_switch *ds = dp->ds; 977 struct flow_action_entry *act; 978 int err; 979 980 if (!ds->ops->port_policer_add) { 981 NL_SET_ERR_MSG_MOD(extack, 982 "Policing offload not implemented"); 983 return -EOPNOTSUPP; 984 } 985 986 if (!ingress) { 987 NL_SET_ERR_MSG_MOD(extack, 988 "Only supported on ingress qdisc"); 989 return -EOPNOTSUPP; 990 } 991 992 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 993 cls->common.extack)) 994 return -EOPNOTSUPP; 995 996 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 997 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 998 NL_SET_ERR_MSG_MOD(extack, 999 "Only one port policer allowed"); 1000 return -EEXIST; 1001 } 1002 } 1003 1004 act = &cls->rule->action.entries[0]; 1005 1006 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1007 if (!mall_tc_entry) 1008 return -ENOMEM; 1009 1010 mall_tc_entry->cookie = cls->cookie; 1011 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1012 policer = &mall_tc_entry->policer; 1013 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1014 policer->burst = act->police.burst; 1015 1016 err = ds->ops->port_policer_add(ds, dp->index, policer); 1017 if (err) { 1018 kfree(mall_tc_entry); 1019 return err; 1020 } 1021 1022 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1023 1024 return err; 1025 } 1026 1027 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1028 struct tc_cls_matchall_offload *cls, 1029 bool ingress) 1030 { 1031 int err = -EOPNOTSUPP; 1032 1033 if (cls->common.protocol == htons(ETH_P_ALL) && 1034 flow_offload_has_one_action(&cls->rule->action) && 1035 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1036 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1037 else if (flow_offload_has_one_action(&cls->rule->action) && 1038 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1039 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1040 1041 return err; 1042 } 1043 1044 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1045 struct tc_cls_matchall_offload *cls) 1046 { 1047 struct dsa_port *dp = dsa_slave_to_port(dev); 1048 struct dsa_mall_tc_entry *mall_tc_entry; 1049 struct dsa_switch *ds = dp->ds; 1050 1051 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1052 if (!mall_tc_entry) 1053 return; 1054 1055 list_del(&mall_tc_entry->list); 1056 1057 switch (mall_tc_entry->type) { 1058 case DSA_PORT_MALL_MIRROR: 1059 if (ds->ops->port_mirror_del) 1060 ds->ops->port_mirror_del(ds, dp->index, 1061 &mall_tc_entry->mirror); 1062 break; 1063 case DSA_PORT_MALL_POLICER: 1064 if (ds->ops->port_policer_del) 1065 ds->ops->port_policer_del(ds, dp->index); 1066 break; 1067 default: 1068 WARN_ON(1); 1069 } 1070 1071 kfree(mall_tc_entry); 1072 } 1073 1074 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1075 struct tc_cls_matchall_offload *cls, 1076 bool ingress) 1077 { 1078 if (cls->common.chain_index) 1079 return -EOPNOTSUPP; 1080 1081 switch (cls->command) { 1082 case TC_CLSMATCHALL_REPLACE: 1083 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1084 case TC_CLSMATCHALL_DESTROY: 1085 dsa_slave_del_cls_matchall(dev, cls); 1086 return 0; 1087 default: 1088 return -EOPNOTSUPP; 1089 } 1090 } 1091 1092 static int dsa_slave_add_cls_flower(struct net_device *dev, 1093 struct flow_cls_offload *cls, 1094 bool ingress) 1095 { 1096 struct dsa_port *dp = dsa_slave_to_port(dev); 1097 struct dsa_switch *ds = dp->ds; 1098 int port = dp->index; 1099 1100 if (!ds->ops->cls_flower_add) 1101 return -EOPNOTSUPP; 1102 1103 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1104 } 1105 1106 static int dsa_slave_del_cls_flower(struct net_device *dev, 1107 struct flow_cls_offload *cls, 1108 bool ingress) 1109 { 1110 struct dsa_port *dp = dsa_slave_to_port(dev); 1111 struct dsa_switch *ds = dp->ds; 1112 int port = dp->index; 1113 1114 if (!ds->ops->cls_flower_del) 1115 return -EOPNOTSUPP; 1116 1117 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1118 } 1119 1120 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1121 struct flow_cls_offload *cls, 1122 bool ingress) 1123 { 1124 struct dsa_port *dp = dsa_slave_to_port(dev); 1125 struct dsa_switch *ds = dp->ds; 1126 int port = dp->index; 1127 1128 if (!ds->ops->cls_flower_stats) 1129 return -EOPNOTSUPP; 1130 1131 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1132 } 1133 1134 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1135 struct flow_cls_offload *cls, 1136 bool ingress) 1137 { 1138 switch (cls->command) { 1139 case FLOW_CLS_REPLACE: 1140 return dsa_slave_add_cls_flower(dev, cls, ingress); 1141 case FLOW_CLS_DESTROY: 1142 return dsa_slave_del_cls_flower(dev, cls, ingress); 1143 case FLOW_CLS_STATS: 1144 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1145 default: 1146 return -EOPNOTSUPP; 1147 } 1148 } 1149 1150 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1151 void *cb_priv, bool ingress) 1152 { 1153 struct net_device *dev = cb_priv; 1154 1155 if (!tc_can_offload(dev)) 1156 return -EOPNOTSUPP; 1157 1158 switch (type) { 1159 case TC_SETUP_CLSMATCHALL: 1160 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1161 case TC_SETUP_CLSFLOWER: 1162 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1163 default: 1164 return -EOPNOTSUPP; 1165 } 1166 } 1167 1168 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1169 void *type_data, void *cb_priv) 1170 { 1171 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1172 } 1173 1174 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1175 void *type_data, void *cb_priv) 1176 { 1177 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1178 } 1179 1180 static LIST_HEAD(dsa_slave_block_cb_list); 1181 1182 static int dsa_slave_setup_tc_block(struct net_device *dev, 1183 struct flow_block_offload *f) 1184 { 1185 struct flow_block_cb *block_cb; 1186 flow_setup_cb_t *cb; 1187 1188 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1189 cb = dsa_slave_setup_tc_block_cb_ig; 1190 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1191 cb = dsa_slave_setup_tc_block_cb_eg; 1192 else 1193 return -EOPNOTSUPP; 1194 1195 f->driver_block_list = &dsa_slave_block_cb_list; 1196 1197 switch (f->command) { 1198 case FLOW_BLOCK_BIND: 1199 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1200 return -EBUSY; 1201 1202 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1203 if (IS_ERR(block_cb)) 1204 return PTR_ERR(block_cb); 1205 1206 flow_block_cb_add(block_cb, f); 1207 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1208 return 0; 1209 case FLOW_BLOCK_UNBIND: 1210 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1211 if (!block_cb) 1212 return -ENOENT; 1213 1214 flow_block_cb_remove(block_cb, f); 1215 list_del(&block_cb->driver_list); 1216 return 0; 1217 default: 1218 return -EOPNOTSUPP; 1219 } 1220 } 1221 1222 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1223 void *type_data) 1224 { 1225 struct dsa_port *dp = dsa_slave_to_port(dev); 1226 struct dsa_switch *ds = dp->ds; 1227 1228 if (type == TC_SETUP_BLOCK) 1229 return dsa_slave_setup_tc_block(dev, type_data); 1230 1231 if (!ds->ops->port_setup_tc) 1232 return -EOPNOTSUPP; 1233 1234 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1235 } 1236 1237 static int dsa_slave_get_rxnfc(struct net_device *dev, 1238 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1239 { 1240 struct dsa_port *dp = dsa_slave_to_port(dev); 1241 struct dsa_switch *ds = dp->ds; 1242 1243 if (!ds->ops->get_rxnfc) 1244 return -EOPNOTSUPP; 1245 1246 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1247 } 1248 1249 static int dsa_slave_set_rxnfc(struct net_device *dev, 1250 struct ethtool_rxnfc *nfc) 1251 { 1252 struct dsa_port *dp = dsa_slave_to_port(dev); 1253 struct dsa_switch *ds = dp->ds; 1254 1255 if (!ds->ops->set_rxnfc) 1256 return -EOPNOTSUPP; 1257 1258 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1259 } 1260 1261 static int dsa_slave_get_ts_info(struct net_device *dev, 1262 struct ethtool_ts_info *ts) 1263 { 1264 struct dsa_slave_priv *p = netdev_priv(dev); 1265 struct dsa_switch *ds = p->dp->ds; 1266 1267 if (!ds->ops->get_ts_info) 1268 return -EOPNOTSUPP; 1269 1270 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1271 } 1272 1273 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1274 u16 vid) 1275 { 1276 struct net_device *master = dsa_slave_to_master(dev); 1277 struct dsa_port *dp = dsa_slave_to_port(dev); 1278 struct switchdev_obj_port_vlan vlan = { 1279 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1280 .vid = vid, 1281 /* This API only allows programming tagged, non-PVID VIDs */ 1282 .flags = 0, 1283 }; 1284 int ret; 1285 1286 /* User port... */ 1287 ret = dsa_port_vlan_add(dp, &vlan); 1288 if (ret) 1289 return ret; 1290 1291 /* And CPU port... */ 1292 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan); 1293 if (ret) 1294 return ret; 1295 1296 return vlan_vid_add(master, proto, vid); 1297 } 1298 1299 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1300 u16 vid) 1301 { 1302 struct net_device *master = dsa_slave_to_master(dev); 1303 struct dsa_port *dp = dsa_slave_to_port(dev); 1304 struct switchdev_obj_port_vlan vlan = { 1305 .vid = vid, 1306 /* This API only allows programming tagged, non-PVID VIDs */ 1307 .flags = 0, 1308 }; 1309 int err; 1310 1311 /* Do not deprogram the CPU port as it may be shared with other user 1312 * ports which can be members of this VLAN as well. 1313 */ 1314 err = dsa_port_vlan_del(dp, &vlan); 1315 if (err) 1316 return err; 1317 1318 vlan_vid_del(master, proto, vid); 1319 1320 return 0; 1321 } 1322 1323 struct dsa_hw_port { 1324 struct list_head list; 1325 struct net_device *dev; 1326 int old_mtu; 1327 }; 1328 1329 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1330 { 1331 const struct dsa_hw_port *p; 1332 int err; 1333 1334 list_for_each_entry(p, hw_port_list, list) { 1335 if (p->dev->mtu == mtu) 1336 continue; 1337 1338 err = dev_set_mtu(p->dev, mtu); 1339 if (err) 1340 goto rollback; 1341 } 1342 1343 return 0; 1344 1345 rollback: 1346 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1347 if (p->dev->mtu == p->old_mtu) 1348 continue; 1349 1350 if (dev_set_mtu(p->dev, p->old_mtu)) 1351 netdev_err(p->dev, "Failed to restore MTU\n"); 1352 } 1353 1354 return err; 1355 } 1356 1357 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1358 { 1359 struct dsa_hw_port *p, *n; 1360 1361 list_for_each_entry_safe(p, n, hw_port_list, list) 1362 kfree(p); 1363 } 1364 1365 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1366 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1367 { 1368 struct list_head hw_port_list; 1369 struct dsa_switch_tree *dst; 1370 int min_mtu = ETH_MAX_MTU; 1371 struct dsa_port *other_dp; 1372 int err; 1373 1374 if (!dp->ds->mtu_enforcement_ingress) 1375 return; 1376 1377 if (!dp->bridge_dev) 1378 return; 1379 1380 INIT_LIST_HEAD(&hw_port_list); 1381 1382 /* Populate the list of ports that are part of the same bridge 1383 * as the newly added/modified port 1384 */ 1385 list_for_each_entry(dst, &dsa_tree_list, list) { 1386 list_for_each_entry(other_dp, &dst->ports, list) { 1387 struct dsa_hw_port *hw_port; 1388 struct net_device *slave; 1389 1390 if (other_dp->type != DSA_PORT_TYPE_USER) 1391 continue; 1392 1393 if (other_dp->bridge_dev != dp->bridge_dev) 1394 continue; 1395 1396 if (!other_dp->ds->mtu_enforcement_ingress) 1397 continue; 1398 1399 slave = other_dp->slave; 1400 1401 if (min_mtu > slave->mtu) 1402 min_mtu = slave->mtu; 1403 1404 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1405 if (!hw_port) 1406 goto out; 1407 1408 hw_port->dev = slave; 1409 hw_port->old_mtu = slave->mtu; 1410 1411 list_add(&hw_port->list, &hw_port_list); 1412 } 1413 } 1414 1415 /* Attempt to configure the entire hardware bridge to the newly added 1416 * interface's MTU first, regardless of whether the intention of the 1417 * user was to raise or lower it. 1418 */ 1419 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1420 if (!err) 1421 goto out; 1422 1423 /* Clearly that didn't work out so well, so just set the minimum MTU on 1424 * all hardware bridge ports now. If this fails too, then all ports will 1425 * still have their old MTU rolled back anyway. 1426 */ 1427 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1428 1429 out: 1430 dsa_hw_port_list_free(&hw_port_list); 1431 } 1432 1433 static int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1434 { 1435 struct net_device *master = dsa_slave_to_master(dev); 1436 struct dsa_port *dp = dsa_slave_to_port(dev); 1437 struct dsa_slave_priv *p = netdev_priv(dev); 1438 struct dsa_switch *ds = p->dp->ds; 1439 struct dsa_port *cpu_dp; 1440 int port = p->dp->index; 1441 int largest_mtu = 0; 1442 int new_master_mtu; 1443 int old_master_mtu; 1444 int mtu_limit; 1445 int cpu_mtu; 1446 int err, i; 1447 1448 if (!ds->ops->port_change_mtu) 1449 return -EOPNOTSUPP; 1450 1451 for (i = 0; i < ds->num_ports; i++) { 1452 int slave_mtu; 1453 1454 if (!dsa_is_user_port(ds, i)) 1455 continue; 1456 1457 /* During probe, this function will be called for each slave 1458 * device, while not all of them have been allocated. That's 1459 * ok, it doesn't change what the maximum is, so ignore it. 1460 */ 1461 if (!dsa_to_port(ds, i)->slave) 1462 continue; 1463 1464 /* Pretend that we already applied the setting, which we 1465 * actually haven't (still haven't done all integrity checks) 1466 */ 1467 if (i == port) 1468 slave_mtu = new_mtu; 1469 else 1470 slave_mtu = dsa_to_port(ds, i)->slave->mtu; 1471 1472 if (largest_mtu < slave_mtu) 1473 largest_mtu = slave_mtu; 1474 } 1475 1476 cpu_dp = dsa_to_port(ds, port)->cpu_dp; 1477 1478 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1479 old_master_mtu = master->mtu; 1480 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead; 1481 if (new_master_mtu > mtu_limit) 1482 return -ERANGE; 1483 1484 /* If the master MTU isn't over limit, there's no need to check the CPU 1485 * MTU, since that surely isn't either. 1486 */ 1487 cpu_mtu = largest_mtu; 1488 1489 /* Start applying stuff */ 1490 if (new_master_mtu != old_master_mtu) { 1491 err = dev_set_mtu(master, new_master_mtu); 1492 if (err < 0) 1493 goto out_master_failed; 1494 1495 /* We only need to propagate the MTU of the CPU port to 1496 * upstream switches. 1497 */ 1498 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true); 1499 if (err) 1500 goto out_cpu_failed; 1501 } 1502 1503 err = dsa_port_mtu_change(dp, new_mtu, false); 1504 if (err) 1505 goto out_port_failed; 1506 1507 dev->mtu = new_mtu; 1508 1509 dsa_bridge_mtu_normalization(dp); 1510 1511 return 0; 1512 1513 out_port_failed: 1514 if (new_master_mtu != old_master_mtu) 1515 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1516 cpu_dp->tag_ops->overhead, 1517 true); 1518 out_cpu_failed: 1519 if (new_master_mtu != old_master_mtu) 1520 dev_set_mtu(master, old_master_mtu); 1521 out_master_failed: 1522 return err; 1523 } 1524 1525 static const struct ethtool_ops dsa_slave_ethtool_ops = { 1526 .get_drvinfo = dsa_slave_get_drvinfo, 1527 .get_regs_len = dsa_slave_get_regs_len, 1528 .get_regs = dsa_slave_get_regs, 1529 .nway_reset = dsa_slave_nway_reset, 1530 .get_link = ethtool_op_get_link, 1531 .get_eeprom_len = dsa_slave_get_eeprom_len, 1532 .get_eeprom = dsa_slave_get_eeprom, 1533 .set_eeprom = dsa_slave_set_eeprom, 1534 .get_strings = dsa_slave_get_strings, 1535 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 1536 .get_sset_count = dsa_slave_get_sset_count, 1537 .set_wol = dsa_slave_set_wol, 1538 .get_wol = dsa_slave_get_wol, 1539 .set_eee = dsa_slave_set_eee, 1540 .get_eee = dsa_slave_get_eee, 1541 .get_link_ksettings = dsa_slave_get_link_ksettings, 1542 .set_link_ksettings = dsa_slave_set_link_ksettings, 1543 .get_pauseparam = dsa_slave_get_pauseparam, 1544 .set_pauseparam = dsa_slave_set_pauseparam, 1545 .get_rxnfc = dsa_slave_get_rxnfc, 1546 .set_rxnfc = dsa_slave_set_rxnfc, 1547 .get_ts_info = dsa_slave_get_ts_info, 1548 }; 1549 1550 /* legacy way, bypassing the bridge *****************************************/ 1551 static int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 1552 struct net_device *dev, 1553 const unsigned char *addr, u16 vid, 1554 u16 flags, 1555 struct netlink_ext_ack *extack) 1556 { 1557 struct dsa_port *dp = dsa_slave_to_port(dev); 1558 1559 return dsa_port_fdb_add(dp, addr, vid); 1560 } 1561 1562 static int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 1563 struct net_device *dev, 1564 const unsigned char *addr, u16 vid) 1565 { 1566 struct dsa_port *dp = dsa_slave_to_port(dev); 1567 1568 return dsa_port_fdb_del(dp, addr, vid); 1569 } 1570 1571 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) 1572 { 1573 struct dsa_port *dp = dsa_slave_to_port(dev); 1574 1575 return dp->ds->devlink ? &dp->devlink_port : NULL; 1576 } 1577 1578 static void dsa_slave_get_stats64(struct net_device *dev, 1579 struct rtnl_link_stats64 *s) 1580 { 1581 struct dsa_port *dp = dsa_slave_to_port(dev); 1582 struct dsa_switch *ds = dp->ds; 1583 1584 if (ds->ops->get_stats64) 1585 ds->ops->get_stats64(ds, dp->index, s); 1586 else 1587 dev_get_tstats64(dev, s); 1588 } 1589 1590 static const struct net_device_ops dsa_slave_netdev_ops = { 1591 .ndo_open = dsa_slave_open, 1592 .ndo_stop = dsa_slave_close, 1593 .ndo_start_xmit = dsa_slave_xmit, 1594 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 1595 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 1596 .ndo_set_mac_address = dsa_slave_set_mac_address, 1597 .ndo_fdb_add = dsa_legacy_fdb_add, 1598 .ndo_fdb_del = dsa_legacy_fdb_del, 1599 .ndo_fdb_dump = dsa_slave_fdb_dump, 1600 .ndo_do_ioctl = dsa_slave_ioctl, 1601 .ndo_get_iflink = dsa_slave_get_iflink, 1602 #ifdef CONFIG_NET_POLL_CONTROLLER 1603 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 1604 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 1605 .ndo_poll_controller = dsa_slave_poll_controller, 1606 #endif 1607 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 1608 .ndo_setup_tc = dsa_slave_setup_tc, 1609 .ndo_get_stats64 = dsa_slave_get_stats64, 1610 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id, 1611 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 1612 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 1613 .ndo_get_devlink_port = dsa_slave_get_devlink_port, 1614 .ndo_change_mtu = dsa_slave_change_mtu, 1615 }; 1616 1617 static struct device_type dsa_type = { 1618 .name = "dsa", 1619 }; 1620 1621 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 1622 { 1623 const struct dsa_port *dp = dsa_to_port(ds, port); 1624 1625 if (dp->pl) 1626 phylink_mac_change(dp->pl, up); 1627 } 1628 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 1629 1630 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 1631 struct phylink_link_state *state) 1632 { 1633 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1634 struct dsa_switch *ds = dp->ds; 1635 1636 /* No need to check that this operation is valid, the callback would 1637 * not be called if it was not. 1638 */ 1639 ds->ops->phylink_fixed_state(ds, dp->index, state); 1640 } 1641 1642 /* slave device setup *******************************************************/ 1643 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) 1644 { 1645 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1646 struct dsa_switch *ds = dp->ds; 1647 1648 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 1649 if (!slave_dev->phydev) { 1650 netdev_err(slave_dev, "no phy at %d\n", addr); 1651 return -ENODEV; 1652 } 1653 1654 return phylink_connect_phy(dp->pl, slave_dev->phydev); 1655 } 1656 1657 static int dsa_slave_phy_setup(struct net_device *slave_dev) 1658 { 1659 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1660 struct device_node *port_dn = dp->dn; 1661 struct dsa_switch *ds = dp->ds; 1662 phy_interface_t mode; 1663 u32 phy_flags = 0; 1664 int ret; 1665 1666 ret = of_get_phy_mode(port_dn, &mode); 1667 if (ret) 1668 mode = PHY_INTERFACE_MODE_NA; 1669 1670 dp->pl_config.dev = &slave_dev->dev; 1671 dp->pl_config.type = PHYLINK_NETDEV; 1672 1673 /* The get_fixed_state callback takes precedence over polling the 1674 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 1675 * this if the switch provides such a callback. 1676 */ 1677 if (ds->ops->phylink_fixed_state) { 1678 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 1679 dp->pl_config.poll_fixed_state = true; 1680 } 1681 1682 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode, 1683 &dsa_port_phylink_mac_ops); 1684 if (IS_ERR(dp->pl)) { 1685 netdev_err(slave_dev, 1686 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 1687 return PTR_ERR(dp->pl); 1688 } 1689 1690 if (ds->ops->get_phy_flags) 1691 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 1692 1693 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 1694 if (ret == -ENODEV && ds->slave_mii_bus) { 1695 /* We could not connect to a designated PHY or SFP, so try to 1696 * use the switch internal MDIO bus instead 1697 */ 1698 ret = dsa_slave_phy_connect(slave_dev, dp->index); 1699 if (ret) { 1700 netdev_err(slave_dev, 1701 "failed to connect to port %d: %d\n", 1702 dp->index, ret); 1703 phylink_destroy(dp->pl); 1704 return ret; 1705 } 1706 } 1707 1708 return ret; 1709 } 1710 1711 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1712 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1713 struct netdev_queue *txq, 1714 void *_unused) 1715 { 1716 lockdep_set_class(&txq->_xmit_lock, 1717 &dsa_slave_netdev_xmit_lock_key); 1718 } 1719 1720 int dsa_slave_suspend(struct net_device *slave_dev) 1721 { 1722 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1723 1724 if (!netif_running(slave_dev)) 1725 return 0; 1726 1727 netif_device_detach(slave_dev); 1728 1729 rtnl_lock(); 1730 phylink_stop(dp->pl); 1731 rtnl_unlock(); 1732 1733 return 0; 1734 } 1735 1736 int dsa_slave_resume(struct net_device *slave_dev) 1737 { 1738 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1739 1740 if (!netif_running(slave_dev)) 1741 return 0; 1742 1743 netif_device_attach(slave_dev); 1744 1745 rtnl_lock(); 1746 phylink_start(dp->pl); 1747 rtnl_unlock(); 1748 1749 return 0; 1750 } 1751 1752 int dsa_slave_create(struct dsa_port *port) 1753 { 1754 const struct dsa_port *cpu_dp = port->cpu_dp; 1755 struct net_device *master = cpu_dp->master; 1756 struct dsa_switch *ds = port->ds; 1757 const char *name = port->name; 1758 struct net_device *slave_dev; 1759 struct dsa_slave_priv *p; 1760 int ret; 1761 1762 if (!ds->num_tx_queues) 1763 ds->num_tx_queues = 1; 1764 1765 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 1766 NET_NAME_UNKNOWN, ether_setup, 1767 ds->num_tx_queues, 1); 1768 if (slave_dev == NULL) 1769 return -ENOMEM; 1770 1771 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1772 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del) 1773 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1774 slave_dev->hw_features |= NETIF_F_HW_TC; 1775 slave_dev->features |= NETIF_F_LLTX; 1776 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1777 if (!IS_ERR_OR_NULL(port->mac)) 1778 ether_addr_copy(slave_dev->dev_addr, port->mac); 1779 else 1780 eth_hw_addr_inherit(slave_dev, master); 1781 slave_dev->priv_flags |= IFF_NO_QUEUE; 1782 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1783 if (ds->ops->port_max_mtu) 1784 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 1785 if (cpu_dp->tag_ops->tail_tag) 1786 slave_dev->needed_tailroom = cpu_dp->tag_ops->overhead; 1787 else 1788 slave_dev->needed_headroom = cpu_dp->tag_ops->overhead; 1789 /* Try to save one extra realloc later in the TX path (in the master) 1790 * by also inheriting the master's needed headroom and tailroom. 1791 * The 8021q driver also does this. 1792 */ 1793 slave_dev->needed_headroom += master->needed_headroom; 1794 slave_dev->needed_tailroom += master->needed_tailroom; 1795 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1796 1797 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1798 NULL); 1799 1800 SET_NETDEV_DEV(slave_dev, port->ds->dev); 1801 slave_dev->dev.of_node = port->dn; 1802 slave_dev->vlan_features = master->vlan_features; 1803 1804 p = netdev_priv(slave_dev); 1805 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1806 if (!slave_dev->tstats) { 1807 free_netdev(slave_dev); 1808 return -ENOMEM; 1809 } 1810 1811 ret = gro_cells_init(&p->gcells, slave_dev); 1812 if (ret) 1813 goto out_free; 1814 1815 p->dp = port; 1816 INIT_LIST_HEAD(&p->mall_tc_list); 1817 p->xmit = cpu_dp->tag_ops->xmit; 1818 port->slave = slave_dev; 1819 1820 rtnl_lock(); 1821 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 1822 rtnl_unlock(); 1823 if (ret && ret != -EOPNOTSUPP) 1824 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 1825 ret, ETH_DATA_LEN, port->index); 1826 1827 netif_carrier_off(slave_dev); 1828 1829 ret = dsa_slave_phy_setup(slave_dev); 1830 if (ret) { 1831 netdev_err(slave_dev, 1832 "error %d setting up PHY for tree %d, switch %d, port %d\n", 1833 ret, ds->dst->index, ds->index, port->index); 1834 goto out_gcells; 1835 } 1836 1837 rtnl_lock(); 1838 1839 ret = register_netdevice(slave_dev); 1840 if (ret) { 1841 netdev_err(master, "error %d registering interface %s\n", 1842 ret, slave_dev->name); 1843 rtnl_unlock(); 1844 goto out_phy; 1845 } 1846 1847 ret = netdev_upper_dev_link(master, slave_dev, NULL); 1848 1849 rtnl_unlock(); 1850 1851 if (ret) 1852 goto out_unregister; 1853 1854 return 0; 1855 1856 out_unregister: 1857 unregister_netdev(slave_dev); 1858 out_phy: 1859 rtnl_lock(); 1860 phylink_disconnect_phy(p->dp->pl); 1861 rtnl_unlock(); 1862 phylink_destroy(p->dp->pl); 1863 out_gcells: 1864 gro_cells_destroy(&p->gcells); 1865 out_free: 1866 free_percpu(slave_dev->tstats); 1867 free_netdev(slave_dev); 1868 port->slave = NULL; 1869 return ret; 1870 } 1871 1872 void dsa_slave_destroy(struct net_device *slave_dev) 1873 { 1874 struct net_device *master = dsa_slave_to_master(slave_dev); 1875 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1876 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1877 1878 netif_carrier_off(slave_dev); 1879 rtnl_lock(); 1880 netdev_upper_dev_unlink(master, slave_dev); 1881 unregister_netdevice(slave_dev); 1882 phylink_disconnect_phy(dp->pl); 1883 rtnl_unlock(); 1884 1885 phylink_destroy(dp->pl); 1886 gro_cells_destroy(&p->gcells); 1887 free_percpu(slave_dev->tstats); 1888 free_netdev(slave_dev); 1889 } 1890 1891 bool dsa_slave_dev_check(const struct net_device *dev) 1892 { 1893 return dev->netdev_ops == &dsa_slave_netdev_ops; 1894 } 1895 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 1896 1897 static int dsa_slave_changeupper(struct net_device *dev, 1898 struct netdev_notifier_changeupper_info *info) 1899 { 1900 struct dsa_port *dp = dsa_slave_to_port(dev); 1901 int err = NOTIFY_DONE; 1902 1903 if (netif_is_bridge_master(info->upper_dev)) { 1904 if (info->linking) { 1905 err = dsa_port_bridge_join(dp, info->upper_dev); 1906 if (!err) 1907 dsa_bridge_mtu_normalization(dp); 1908 err = notifier_from_errno(err); 1909 } else { 1910 dsa_port_bridge_leave(dp, info->upper_dev); 1911 err = NOTIFY_OK; 1912 } 1913 } else if (netif_is_lag_master(info->upper_dev)) { 1914 if (info->linking) { 1915 err = dsa_port_lag_join(dp, info->upper_dev, 1916 info->upper_info); 1917 if (err == -EOPNOTSUPP) { 1918 NL_SET_ERR_MSG_MOD(info->info.extack, 1919 "Offloading not supported"); 1920 err = 0; 1921 } 1922 err = notifier_from_errno(err); 1923 } else { 1924 dsa_port_lag_leave(dp, info->upper_dev); 1925 err = NOTIFY_OK; 1926 } 1927 } 1928 1929 return err; 1930 } 1931 1932 static int 1933 dsa_slave_lag_changeupper(struct net_device *dev, 1934 struct netdev_notifier_changeupper_info *info) 1935 { 1936 struct net_device *lower; 1937 struct list_head *iter; 1938 int err = NOTIFY_DONE; 1939 struct dsa_port *dp; 1940 1941 netdev_for_each_lower_dev(dev, lower, iter) { 1942 if (!dsa_slave_dev_check(lower)) 1943 continue; 1944 1945 dp = dsa_slave_to_port(lower); 1946 if (!dp->lag_dev) 1947 /* Software LAG */ 1948 continue; 1949 1950 err = dsa_slave_changeupper(lower, info); 1951 if (notifier_to_errno(err)) 1952 break; 1953 } 1954 1955 return err; 1956 } 1957 1958 static int 1959 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 1960 struct netdev_notifier_changeupper_info *info) 1961 { 1962 struct netlink_ext_ack *ext_ack; 1963 struct net_device *slave; 1964 struct dsa_port *dp; 1965 1966 ext_ack = netdev_notifier_info_to_extack(&info->info); 1967 1968 if (!is_vlan_dev(dev)) 1969 return NOTIFY_DONE; 1970 1971 slave = vlan_dev_real_dev(dev); 1972 if (!dsa_slave_dev_check(slave)) 1973 return NOTIFY_DONE; 1974 1975 dp = dsa_slave_to_port(slave); 1976 if (!dp->bridge_dev) 1977 return NOTIFY_DONE; 1978 1979 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 1980 if (br_vlan_enabled(dp->bridge_dev) && 1981 netif_is_bridge_master(info->upper_dev) && info->linking) { 1982 NL_SET_ERR_MSG_MOD(ext_ack, 1983 "Cannot enslave VLAN device into VLAN aware bridge"); 1984 return notifier_from_errno(-EINVAL); 1985 } 1986 1987 return NOTIFY_DONE; 1988 } 1989 1990 static int 1991 dsa_slave_check_8021q_upper(struct net_device *dev, 1992 struct netdev_notifier_changeupper_info *info) 1993 { 1994 struct dsa_port *dp = dsa_slave_to_port(dev); 1995 struct net_device *br = dp->bridge_dev; 1996 struct bridge_vlan_info br_info; 1997 struct netlink_ext_ack *extack; 1998 int err = NOTIFY_DONE; 1999 u16 vid; 2000 2001 if (!br || !br_vlan_enabled(br)) 2002 return NOTIFY_DONE; 2003 2004 extack = netdev_notifier_info_to_extack(&info->info); 2005 vid = vlan_dev_vlan_id(info->upper_dev); 2006 2007 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2008 * device, respectively the VID is not found, returning 2009 * 0 means success, which is a failure for us here. 2010 */ 2011 err = br_vlan_get_info(br, vid, &br_info); 2012 if (err == 0) { 2013 NL_SET_ERR_MSG_MOD(extack, 2014 "This VLAN is already configured by the bridge"); 2015 return notifier_from_errno(-EBUSY); 2016 } 2017 2018 return NOTIFY_DONE; 2019 } 2020 2021 static int dsa_slave_netdevice_event(struct notifier_block *nb, 2022 unsigned long event, void *ptr) 2023 { 2024 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2025 2026 switch (event) { 2027 case NETDEV_PRECHANGEUPPER: { 2028 struct netdev_notifier_changeupper_info *info = ptr; 2029 struct dsa_switch *ds; 2030 struct dsa_port *dp; 2031 int err; 2032 2033 if (!dsa_slave_dev_check(dev)) 2034 return dsa_prevent_bridging_8021q_upper(dev, ptr); 2035 2036 dp = dsa_slave_to_port(dev); 2037 ds = dp->ds; 2038 2039 if (ds->ops->port_prechangeupper) { 2040 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2041 if (err) 2042 return notifier_from_errno(err); 2043 } 2044 2045 if (is_vlan_dev(info->upper_dev)) 2046 return dsa_slave_check_8021q_upper(dev, ptr); 2047 break; 2048 } 2049 case NETDEV_CHANGEUPPER: 2050 if (dsa_slave_dev_check(dev)) 2051 return dsa_slave_changeupper(dev, ptr); 2052 2053 if (netif_is_lag_master(dev)) 2054 return dsa_slave_lag_changeupper(dev, ptr); 2055 2056 break; 2057 case NETDEV_CHANGELOWERSTATE: { 2058 struct netdev_notifier_changelowerstate_info *info = ptr; 2059 struct dsa_port *dp; 2060 int err; 2061 2062 if (!dsa_slave_dev_check(dev)) 2063 break; 2064 2065 dp = dsa_slave_to_port(dev); 2066 2067 err = dsa_port_lag_change(dp, info->lower_state_info); 2068 return notifier_from_errno(err); 2069 } 2070 } 2071 2072 return NOTIFY_DONE; 2073 } 2074 2075 static void 2076 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 2077 { 2078 struct dsa_switch *ds = switchdev_work->ds; 2079 struct switchdev_notifier_fdb_info info; 2080 struct dsa_port *dp; 2081 2082 if (!dsa_is_user_port(ds, switchdev_work->port)) 2083 return; 2084 2085 info.addr = switchdev_work->addr; 2086 info.vid = switchdev_work->vid; 2087 info.offloaded = true; 2088 dp = dsa_to_port(ds, switchdev_work->port); 2089 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 2090 dp->slave, &info.info, NULL); 2091 } 2092 2093 static void dsa_slave_switchdev_event_work(struct work_struct *work) 2094 { 2095 struct dsa_switchdev_event_work *switchdev_work = 2096 container_of(work, struct dsa_switchdev_event_work, work); 2097 struct dsa_switch *ds = switchdev_work->ds; 2098 struct dsa_port *dp; 2099 int err; 2100 2101 dp = dsa_to_port(ds, switchdev_work->port); 2102 2103 rtnl_lock(); 2104 switch (switchdev_work->event) { 2105 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2106 err = dsa_port_fdb_add(dp, switchdev_work->addr, 2107 switchdev_work->vid); 2108 if (err) { 2109 dev_err(ds->dev, 2110 "port %d failed to add %pM vid %d to fdb: %d\n", 2111 dp->index, switchdev_work->addr, 2112 switchdev_work->vid, err); 2113 break; 2114 } 2115 dsa_fdb_offload_notify(switchdev_work); 2116 break; 2117 2118 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2119 err = dsa_port_fdb_del(dp, switchdev_work->addr, 2120 switchdev_work->vid); 2121 if (err) { 2122 dev_err(ds->dev, 2123 "port %d failed to delete %pM vid %d from fdb: %d\n", 2124 dp->index, switchdev_work->addr, 2125 switchdev_work->vid, err); 2126 } 2127 2128 break; 2129 } 2130 rtnl_unlock(); 2131 2132 kfree(switchdev_work); 2133 if (dsa_is_user_port(ds, dp->index)) 2134 dev_put(dp->slave); 2135 } 2136 2137 static int dsa_lower_dev_walk(struct net_device *lower_dev, 2138 struct netdev_nested_priv *priv) 2139 { 2140 if (dsa_slave_dev_check(lower_dev)) { 2141 priv->data = (void *)netdev_priv(lower_dev); 2142 return 1; 2143 } 2144 2145 return 0; 2146 } 2147 2148 static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev) 2149 { 2150 struct netdev_nested_priv priv = { 2151 .data = NULL, 2152 }; 2153 2154 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv); 2155 2156 return (struct dsa_slave_priv *)priv.data; 2157 } 2158 2159 /* Called under rcu_read_lock() */ 2160 static int dsa_slave_switchdev_event(struct notifier_block *unused, 2161 unsigned long event, void *ptr) 2162 { 2163 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2164 const struct switchdev_notifier_fdb_info *fdb_info; 2165 struct dsa_switchdev_event_work *switchdev_work; 2166 struct dsa_port *dp; 2167 int err; 2168 2169 switch (event) { 2170 case SWITCHDEV_PORT_ATTR_SET: 2171 err = switchdev_handle_port_attr_set(dev, ptr, 2172 dsa_slave_dev_check, 2173 dsa_slave_port_attr_set); 2174 return notifier_from_errno(err); 2175 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2176 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2177 fdb_info = ptr; 2178 2179 if (dsa_slave_dev_check(dev)) { 2180 if (!fdb_info->added_by_user) 2181 return NOTIFY_OK; 2182 2183 dp = dsa_slave_to_port(dev); 2184 } else { 2185 /* Snoop addresses learnt on foreign interfaces 2186 * bridged with us, for switches that don't 2187 * automatically learn SA from CPU-injected traffic 2188 */ 2189 struct net_device *br_dev; 2190 struct dsa_slave_priv *p; 2191 2192 br_dev = netdev_master_upper_dev_get_rcu(dev); 2193 if (!br_dev) 2194 return NOTIFY_DONE; 2195 2196 if (!netif_is_bridge_master(br_dev)) 2197 return NOTIFY_DONE; 2198 2199 p = dsa_slave_dev_lower_find(br_dev); 2200 if (!p) 2201 return NOTIFY_DONE; 2202 2203 dp = p->dp->cpu_dp; 2204 2205 if (!dp->ds->assisted_learning_on_cpu_port) 2206 return NOTIFY_DONE; 2207 } 2208 2209 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del) 2210 return NOTIFY_DONE; 2211 2212 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 2213 if (!switchdev_work) 2214 return NOTIFY_BAD; 2215 2216 INIT_WORK(&switchdev_work->work, 2217 dsa_slave_switchdev_event_work); 2218 switchdev_work->ds = dp->ds; 2219 switchdev_work->port = dp->index; 2220 switchdev_work->event = event; 2221 2222 ether_addr_copy(switchdev_work->addr, 2223 fdb_info->addr); 2224 switchdev_work->vid = fdb_info->vid; 2225 2226 /* Hold a reference on the slave for dsa_fdb_offload_notify */ 2227 if (dsa_is_user_port(dp->ds, dp->index)) 2228 dev_hold(dev); 2229 dsa_schedule_work(&switchdev_work->work); 2230 break; 2231 default: 2232 return NOTIFY_DONE; 2233 } 2234 2235 return NOTIFY_OK; 2236 } 2237 2238 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 2239 unsigned long event, void *ptr) 2240 { 2241 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2242 int err; 2243 2244 switch (event) { 2245 case SWITCHDEV_PORT_OBJ_ADD: 2246 err = switchdev_handle_port_obj_add(dev, ptr, 2247 dsa_slave_dev_check, 2248 dsa_slave_port_obj_add); 2249 return notifier_from_errno(err); 2250 case SWITCHDEV_PORT_OBJ_DEL: 2251 err = switchdev_handle_port_obj_del(dev, ptr, 2252 dsa_slave_dev_check, 2253 dsa_slave_port_obj_del); 2254 return notifier_from_errno(err); 2255 case SWITCHDEV_PORT_ATTR_SET: 2256 err = switchdev_handle_port_attr_set(dev, ptr, 2257 dsa_slave_dev_check, 2258 dsa_slave_port_attr_set); 2259 return notifier_from_errno(err); 2260 } 2261 2262 return NOTIFY_DONE; 2263 } 2264 2265 static struct notifier_block dsa_slave_nb __read_mostly = { 2266 .notifier_call = dsa_slave_netdevice_event, 2267 }; 2268 2269 static struct notifier_block dsa_slave_switchdev_notifier = { 2270 .notifier_call = dsa_slave_switchdev_event, 2271 }; 2272 2273 static struct notifier_block dsa_slave_switchdev_blocking_notifier = { 2274 .notifier_call = dsa_slave_switchdev_blocking_event, 2275 }; 2276 2277 int dsa_slave_register_notifier(void) 2278 { 2279 struct notifier_block *nb; 2280 int err; 2281 2282 err = register_netdevice_notifier(&dsa_slave_nb); 2283 if (err) 2284 return err; 2285 2286 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 2287 if (err) 2288 goto err_switchdev_nb; 2289 2290 nb = &dsa_slave_switchdev_blocking_notifier; 2291 err = register_switchdev_blocking_notifier(nb); 2292 if (err) 2293 goto err_switchdev_blocking_nb; 2294 2295 return 0; 2296 2297 err_switchdev_blocking_nb: 2298 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2299 err_switchdev_nb: 2300 unregister_netdevice_notifier(&dsa_slave_nb); 2301 return err; 2302 } 2303 2304 void dsa_slave_unregister_notifier(void) 2305 { 2306 struct notifier_block *nb; 2307 int err; 2308 2309 nb = &dsa_slave_switchdev_blocking_notifier; 2310 err = unregister_switchdev_blocking_notifier(nb); 2311 if (err) 2312 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 2313 2314 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2315 if (err) 2316 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 2317 2318 err = unregister_netdevice_notifier(&dsa_slave_nb); 2319 if (err) 2320 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 2321 } 2322