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