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) 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 { 331 struct net_device *master = dsa_slave_to_master(dev); 332 struct dsa_port *dp = dsa_slave_to_port(dev); 333 struct switchdev_obj_port_vlan vlan; 334 int err; 335 336 if (obj->orig_dev != dev) 337 return -EOPNOTSUPP; 338 339 if (dsa_port_skip_vlan_configuration(dp)) 340 return 0; 341 342 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 343 344 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 345 * the same VID. 346 */ 347 if (br_vlan_enabled(dp->bridge_dev)) { 348 rcu_read_lock(); 349 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan); 350 rcu_read_unlock(); 351 if (err) 352 return err; 353 } 354 355 err = dsa_port_vlan_add(dp, &vlan); 356 if (err) 357 return err; 358 359 /* We need the dedicated CPU port to be a member of the VLAN as well. 360 * Even though drivers often handle CPU membership in special ways, 361 * it doesn't make sense to program a PVID, so clear this flag. 362 */ 363 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 364 365 err = dsa_port_vlan_add(dp->cpu_dp, &vlan); 366 if (err) 367 return err; 368 369 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid); 370 } 371 372 static int dsa_slave_port_obj_add(struct net_device *dev, 373 const struct switchdev_obj *obj, 374 struct netlink_ext_ack *extack) 375 { 376 struct dsa_port *dp = dsa_slave_to_port(dev); 377 int err; 378 379 /* For the prepare phase, ensure the full set of changes is feasable in 380 * one go in order to signal a failure properly. If an operation is not 381 * supported, return -EOPNOTSUPP. 382 */ 383 384 switch (obj->id) { 385 case SWITCHDEV_OBJ_ID_PORT_MDB: 386 if (obj->orig_dev != dev) 387 return -EOPNOTSUPP; 388 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 389 break; 390 case SWITCHDEV_OBJ_ID_HOST_MDB: 391 /* DSA can directly translate this to a normal MDB add, 392 * but on the CPU port. 393 */ 394 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 395 break; 396 case SWITCHDEV_OBJ_ID_PORT_VLAN: 397 err = dsa_slave_vlan_add(dev, obj); 398 break; 399 default: 400 err = -EOPNOTSUPP; 401 break; 402 } 403 404 return err; 405 } 406 407 static int dsa_slave_vlan_del(struct net_device *dev, 408 const struct switchdev_obj *obj) 409 { 410 struct net_device *master = dsa_slave_to_master(dev); 411 struct dsa_port *dp = dsa_slave_to_port(dev); 412 struct switchdev_obj_port_vlan *vlan; 413 int err; 414 415 if (obj->orig_dev != dev) 416 return -EOPNOTSUPP; 417 418 if (dsa_port_skip_vlan_configuration(dp)) 419 return 0; 420 421 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 422 423 /* Do not deprogram the CPU port as it may be shared with other user 424 * ports which can be members of this VLAN as well. 425 */ 426 err = dsa_port_vlan_del(dp, vlan); 427 if (err) 428 return err; 429 430 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid); 431 432 return 0; 433 } 434 435 static int dsa_slave_port_obj_del(struct net_device *dev, 436 const struct switchdev_obj *obj) 437 { 438 struct dsa_port *dp = dsa_slave_to_port(dev); 439 int err; 440 441 switch (obj->id) { 442 case SWITCHDEV_OBJ_ID_PORT_MDB: 443 if (obj->orig_dev != dev) 444 return -EOPNOTSUPP; 445 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 446 break; 447 case SWITCHDEV_OBJ_ID_HOST_MDB: 448 /* DSA can directly translate this to a normal MDB add, 449 * but on the CPU port. 450 */ 451 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 452 break; 453 case SWITCHDEV_OBJ_ID_PORT_VLAN: 454 err = dsa_slave_vlan_del(dev, obj); 455 break; 456 default: 457 err = -EOPNOTSUPP; 458 break; 459 } 460 461 return err; 462 } 463 464 static int dsa_slave_get_port_parent_id(struct net_device *dev, 465 struct netdev_phys_item_id *ppid) 466 { 467 struct dsa_port *dp = dsa_slave_to_port(dev); 468 struct dsa_switch *ds = dp->ds; 469 struct dsa_switch_tree *dst = ds->dst; 470 471 /* For non-legacy ports, devlink is used and it takes 472 * care of the name generation. This ndo implementation 473 * should be removed with legacy support. 474 */ 475 if (dp->ds->devlink) 476 return -EOPNOTSUPP; 477 478 ppid->id_len = sizeof(dst->index); 479 memcpy(&ppid->id, &dst->index, ppid->id_len); 480 481 return 0; 482 } 483 484 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 485 struct sk_buff *skb) 486 { 487 #ifdef CONFIG_NET_POLL_CONTROLLER 488 struct dsa_slave_priv *p = netdev_priv(dev); 489 490 return netpoll_send_skb(p->netpoll, skb); 491 #else 492 BUG(); 493 return NETDEV_TX_OK; 494 #endif 495 } 496 497 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 498 struct sk_buff *skb) 499 { 500 struct dsa_switch *ds = p->dp->ds; 501 struct sk_buff *clone; 502 unsigned int type; 503 504 type = ptp_classify_raw(skb); 505 if (type == PTP_CLASS_NONE) 506 return; 507 508 if (!ds->ops->port_txtstamp) 509 return; 510 511 clone = skb_clone_sk(skb); 512 if (!clone) 513 return; 514 515 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) { 516 DSA_SKB_CB(skb)->clone = clone; 517 return; 518 } 519 520 kfree_skb(clone); 521 } 522 523 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 524 { 525 /* SKB for netpoll still need to be mangled with the protocol-specific 526 * tag to be successfully transmitted 527 */ 528 if (unlikely(netpoll_tx_running(dev))) 529 return dsa_slave_netpoll_send_skb(dev, skb); 530 531 /* Queue the SKB for transmission on the parent interface, but 532 * do not modify its EtherType 533 */ 534 skb->dev = dsa_slave_to_master(dev); 535 dev_queue_xmit(skb); 536 537 return NETDEV_TX_OK; 538 } 539 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 540 541 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) 542 { 543 int needed_headroom = dev->needed_headroom; 544 int needed_tailroom = dev->needed_tailroom; 545 546 /* For tail taggers, we need to pad short frames ourselves, to ensure 547 * that the tail tag does not fail at its role of being at the end of 548 * the packet, once the master interface pads the frame. Account for 549 * that pad length here, and pad later. 550 */ 551 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) 552 needed_tailroom += ETH_ZLEN - skb->len; 553 /* skb_headroom() returns unsigned int... */ 554 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); 555 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); 556 557 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) 558 /* No reallocation needed, yay! */ 559 return 0; 560 561 return pskb_expand_head(skb, needed_headroom, needed_tailroom, 562 GFP_ATOMIC); 563 } 564 565 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 566 { 567 struct dsa_slave_priv *p = netdev_priv(dev); 568 struct sk_buff *nskb; 569 570 dev_sw_netstats_tx_add(dev, 1, skb->len); 571 572 DSA_SKB_CB(skb)->clone = NULL; 573 574 /* Identify PTP protocol packets, clone them, and pass them to the 575 * switch driver 576 */ 577 dsa_skb_tx_timestamp(p, skb); 578 579 if (dsa_realloc_skb(skb, dev)) { 580 dev_kfree_skb_any(skb); 581 return NETDEV_TX_OK; 582 } 583 584 /* needed_tailroom should still be 'warm' in the cache line from 585 * dsa_realloc_skb(), which has also ensured that padding is safe. 586 */ 587 if (dev->needed_tailroom) 588 eth_skb_pad(skb); 589 590 /* Transmit function may have to reallocate the original SKB, 591 * in which case it must have freed it. Only free it here on error. 592 */ 593 nskb = p->xmit(skb, dev); 594 if (!nskb) { 595 kfree_skb(skb); 596 return NETDEV_TX_OK; 597 } 598 599 return dsa_enqueue_skb(nskb, dev); 600 } 601 602 /* ethtool operations *******************************************************/ 603 604 static void dsa_slave_get_drvinfo(struct net_device *dev, 605 struct ethtool_drvinfo *drvinfo) 606 { 607 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 608 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 609 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 610 } 611 612 static int dsa_slave_get_regs_len(struct net_device *dev) 613 { 614 struct dsa_port *dp = dsa_slave_to_port(dev); 615 struct dsa_switch *ds = dp->ds; 616 617 if (ds->ops->get_regs_len) 618 return ds->ops->get_regs_len(ds, dp->index); 619 620 return -EOPNOTSUPP; 621 } 622 623 static void 624 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 625 { 626 struct dsa_port *dp = dsa_slave_to_port(dev); 627 struct dsa_switch *ds = dp->ds; 628 629 if (ds->ops->get_regs) 630 ds->ops->get_regs(ds, dp->index, regs, _p); 631 } 632 633 static int dsa_slave_nway_reset(struct net_device *dev) 634 { 635 struct dsa_port *dp = dsa_slave_to_port(dev); 636 637 return phylink_ethtool_nway_reset(dp->pl); 638 } 639 640 static int dsa_slave_get_eeprom_len(struct net_device *dev) 641 { 642 struct dsa_port *dp = dsa_slave_to_port(dev); 643 struct dsa_switch *ds = dp->ds; 644 645 if (ds->cd && ds->cd->eeprom_len) 646 return ds->cd->eeprom_len; 647 648 if (ds->ops->get_eeprom_len) 649 return ds->ops->get_eeprom_len(ds); 650 651 return 0; 652 } 653 654 static int dsa_slave_get_eeprom(struct net_device *dev, 655 struct ethtool_eeprom *eeprom, u8 *data) 656 { 657 struct dsa_port *dp = dsa_slave_to_port(dev); 658 struct dsa_switch *ds = dp->ds; 659 660 if (ds->ops->get_eeprom) 661 return ds->ops->get_eeprom(ds, eeprom, data); 662 663 return -EOPNOTSUPP; 664 } 665 666 static int dsa_slave_set_eeprom(struct net_device *dev, 667 struct ethtool_eeprom *eeprom, u8 *data) 668 { 669 struct dsa_port *dp = dsa_slave_to_port(dev); 670 struct dsa_switch *ds = dp->ds; 671 672 if (ds->ops->set_eeprom) 673 return ds->ops->set_eeprom(ds, eeprom, data); 674 675 return -EOPNOTSUPP; 676 } 677 678 static void dsa_slave_get_strings(struct net_device *dev, 679 uint32_t stringset, uint8_t *data) 680 { 681 struct dsa_port *dp = dsa_slave_to_port(dev); 682 struct dsa_switch *ds = dp->ds; 683 684 if (stringset == ETH_SS_STATS) { 685 int len = ETH_GSTRING_LEN; 686 687 strncpy(data, "tx_packets", len); 688 strncpy(data + len, "tx_bytes", len); 689 strncpy(data + 2 * len, "rx_packets", len); 690 strncpy(data + 3 * len, "rx_bytes", len); 691 if (ds->ops->get_strings) 692 ds->ops->get_strings(ds, dp->index, stringset, 693 data + 4 * len); 694 } 695 } 696 697 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 698 struct ethtool_stats *stats, 699 uint64_t *data) 700 { 701 struct dsa_port *dp = dsa_slave_to_port(dev); 702 struct dsa_switch *ds = dp->ds; 703 struct pcpu_sw_netstats *s; 704 unsigned int start; 705 int i; 706 707 for_each_possible_cpu(i) { 708 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 709 710 s = per_cpu_ptr(dev->tstats, i); 711 do { 712 start = u64_stats_fetch_begin_irq(&s->syncp); 713 tx_packets = s->tx_packets; 714 tx_bytes = s->tx_bytes; 715 rx_packets = s->rx_packets; 716 rx_bytes = s->rx_bytes; 717 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 718 data[0] += tx_packets; 719 data[1] += tx_bytes; 720 data[2] += rx_packets; 721 data[3] += rx_bytes; 722 } 723 if (ds->ops->get_ethtool_stats) 724 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 725 } 726 727 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 728 { 729 struct dsa_port *dp = dsa_slave_to_port(dev); 730 struct dsa_switch *ds = dp->ds; 731 732 if (sset == ETH_SS_STATS) { 733 int count; 734 735 count = 4; 736 if (ds->ops->get_sset_count) 737 count += ds->ops->get_sset_count(ds, dp->index, sset); 738 739 return count; 740 } 741 742 return -EOPNOTSUPP; 743 } 744 745 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 746 { 747 struct dsa_port *dp = dsa_slave_to_port(dev); 748 struct dsa_switch *ds = dp->ds; 749 750 phylink_ethtool_get_wol(dp->pl, w); 751 752 if (ds->ops->get_wol) 753 ds->ops->get_wol(ds, dp->index, w); 754 } 755 756 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 757 { 758 struct dsa_port *dp = dsa_slave_to_port(dev); 759 struct dsa_switch *ds = dp->ds; 760 int ret = -EOPNOTSUPP; 761 762 phylink_ethtool_set_wol(dp->pl, w); 763 764 if (ds->ops->set_wol) 765 ret = ds->ops->set_wol(ds, dp->index, w); 766 767 return ret; 768 } 769 770 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 771 { 772 struct dsa_port *dp = dsa_slave_to_port(dev); 773 struct dsa_switch *ds = dp->ds; 774 int ret; 775 776 /* Port's PHY and MAC both need to be EEE capable */ 777 if (!dev->phydev || !dp->pl) 778 return -ENODEV; 779 780 if (!ds->ops->set_mac_eee) 781 return -EOPNOTSUPP; 782 783 ret = ds->ops->set_mac_eee(ds, dp->index, e); 784 if (ret) 785 return ret; 786 787 return phylink_ethtool_set_eee(dp->pl, e); 788 } 789 790 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 791 { 792 struct dsa_port *dp = dsa_slave_to_port(dev); 793 struct dsa_switch *ds = dp->ds; 794 int ret; 795 796 /* Port's PHY and MAC both need to be EEE capable */ 797 if (!dev->phydev || !dp->pl) 798 return -ENODEV; 799 800 if (!ds->ops->get_mac_eee) 801 return -EOPNOTSUPP; 802 803 ret = ds->ops->get_mac_eee(ds, dp->index, e); 804 if (ret) 805 return ret; 806 807 return phylink_ethtool_get_eee(dp->pl, e); 808 } 809 810 static int dsa_slave_get_link_ksettings(struct net_device *dev, 811 struct ethtool_link_ksettings *cmd) 812 { 813 struct dsa_port *dp = dsa_slave_to_port(dev); 814 815 return phylink_ethtool_ksettings_get(dp->pl, cmd); 816 } 817 818 static int dsa_slave_set_link_ksettings(struct net_device *dev, 819 const struct ethtool_link_ksettings *cmd) 820 { 821 struct dsa_port *dp = dsa_slave_to_port(dev); 822 823 return phylink_ethtool_ksettings_set(dp->pl, cmd); 824 } 825 826 static void dsa_slave_get_pauseparam(struct net_device *dev, 827 struct ethtool_pauseparam *pause) 828 { 829 struct dsa_port *dp = dsa_slave_to_port(dev); 830 831 phylink_ethtool_get_pauseparam(dp->pl, pause); 832 } 833 834 static int dsa_slave_set_pauseparam(struct net_device *dev, 835 struct ethtool_pauseparam *pause) 836 { 837 struct dsa_port *dp = dsa_slave_to_port(dev); 838 839 return phylink_ethtool_set_pauseparam(dp->pl, pause); 840 } 841 842 #ifdef CONFIG_NET_POLL_CONTROLLER 843 static int dsa_slave_netpoll_setup(struct net_device *dev, 844 struct netpoll_info *ni) 845 { 846 struct net_device *master = dsa_slave_to_master(dev); 847 struct dsa_slave_priv *p = netdev_priv(dev); 848 struct netpoll *netpoll; 849 int err = 0; 850 851 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 852 if (!netpoll) 853 return -ENOMEM; 854 855 err = __netpoll_setup(netpoll, master); 856 if (err) { 857 kfree(netpoll); 858 goto out; 859 } 860 861 p->netpoll = netpoll; 862 out: 863 return err; 864 } 865 866 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 867 { 868 struct dsa_slave_priv *p = netdev_priv(dev); 869 struct netpoll *netpoll = p->netpoll; 870 871 if (!netpoll) 872 return; 873 874 p->netpoll = NULL; 875 876 __netpoll_free(netpoll); 877 } 878 879 static void dsa_slave_poll_controller(struct net_device *dev) 880 { 881 } 882 #endif 883 884 static int dsa_slave_get_phys_port_name(struct net_device *dev, 885 char *name, size_t len) 886 { 887 struct dsa_port *dp = dsa_slave_to_port(dev); 888 889 /* For non-legacy ports, devlink is used and it takes 890 * care of the name generation. This ndo implementation 891 * should be removed with legacy support. 892 */ 893 if (dp->ds->devlink) 894 return -EOPNOTSUPP; 895 896 if (snprintf(name, len, "p%d", dp->index) >= len) 897 return -EINVAL; 898 899 return 0; 900 } 901 902 static struct dsa_mall_tc_entry * 903 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 904 { 905 struct dsa_slave_priv *p = netdev_priv(dev); 906 struct dsa_mall_tc_entry *mall_tc_entry; 907 908 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 909 if (mall_tc_entry->cookie == cookie) 910 return mall_tc_entry; 911 912 return NULL; 913 } 914 915 static int 916 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 917 struct tc_cls_matchall_offload *cls, 918 bool ingress) 919 { 920 struct dsa_port *dp = dsa_slave_to_port(dev); 921 struct dsa_slave_priv *p = netdev_priv(dev); 922 struct dsa_mall_mirror_tc_entry *mirror; 923 struct dsa_mall_tc_entry *mall_tc_entry; 924 struct dsa_switch *ds = dp->ds; 925 struct flow_action_entry *act; 926 struct dsa_port *to_dp; 927 int err; 928 929 if (!ds->ops->port_mirror_add) 930 return -EOPNOTSUPP; 931 932 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 933 cls->common.extack)) 934 return -EOPNOTSUPP; 935 936 act = &cls->rule->action.entries[0]; 937 938 if (!act->dev) 939 return -EINVAL; 940 941 if (!dsa_slave_dev_check(act->dev)) 942 return -EOPNOTSUPP; 943 944 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 945 if (!mall_tc_entry) 946 return -ENOMEM; 947 948 mall_tc_entry->cookie = cls->cookie; 949 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 950 mirror = &mall_tc_entry->mirror; 951 952 to_dp = dsa_slave_to_port(act->dev); 953 954 mirror->to_local_port = to_dp->index; 955 mirror->ingress = ingress; 956 957 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); 958 if (err) { 959 kfree(mall_tc_entry); 960 return err; 961 } 962 963 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 964 965 return err; 966 } 967 968 static int 969 dsa_slave_add_cls_matchall_police(struct net_device *dev, 970 struct tc_cls_matchall_offload *cls, 971 bool ingress) 972 { 973 struct netlink_ext_ack *extack = cls->common.extack; 974 struct dsa_port *dp = dsa_slave_to_port(dev); 975 struct dsa_slave_priv *p = netdev_priv(dev); 976 struct dsa_mall_policer_tc_entry *policer; 977 struct dsa_mall_tc_entry *mall_tc_entry; 978 struct dsa_switch *ds = dp->ds; 979 struct flow_action_entry *act; 980 int err; 981 982 if (!ds->ops->port_policer_add) { 983 NL_SET_ERR_MSG_MOD(extack, 984 "Policing offload not implemented"); 985 return -EOPNOTSUPP; 986 } 987 988 if (!ingress) { 989 NL_SET_ERR_MSG_MOD(extack, 990 "Only supported on ingress qdisc"); 991 return -EOPNOTSUPP; 992 } 993 994 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 995 cls->common.extack)) 996 return -EOPNOTSUPP; 997 998 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 999 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1000 NL_SET_ERR_MSG_MOD(extack, 1001 "Only one port policer allowed"); 1002 return -EEXIST; 1003 } 1004 } 1005 1006 act = &cls->rule->action.entries[0]; 1007 1008 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1009 if (!mall_tc_entry) 1010 return -ENOMEM; 1011 1012 mall_tc_entry->cookie = cls->cookie; 1013 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1014 policer = &mall_tc_entry->policer; 1015 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1016 policer->burst = act->police.burst; 1017 1018 err = ds->ops->port_policer_add(ds, dp->index, policer); 1019 if (err) { 1020 kfree(mall_tc_entry); 1021 return err; 1022 } 1023 1024 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1025 1026 return err; 1027 } 1028 1029 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1030 struct tc_cls_matchall_offload *cls, 1031 bool ingress) 1032 { 1033 int err = -EOPNOTSUPP; 1034 1035 if (cls->common.protocol == htons(ETH_P_ALL) && 1036 flow_offload_has_one_action(&cls->rule->action) && 1037 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1038 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1039 else if (flow_offload_has_one_action(&cls->rule->action) && 1040 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1041 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1042 1043 return err; 1044 } 1045 1046 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1047 struct tc_cls_matchall_offload *cls) 1048 { 1049 struct dsa_port *dp = dsa_slave_to_port(dev); 1050 struct dsa_mall_tc_entry *mall_tc_entry; 1051 struct dsa_switch *ds = dp->ds; 1052 1053 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1054 if (!mall_tc_entry) 1055 return; 1056 1057 list_del(&mall_tc_entry->list); 1058 1059 switch (mall_tc_entry->type) { 1060 case DSA_PORT_MALL_MIRROR: 1061 if (ds->ops->port_mirror_del) 1062 ds->ops->port_mirror_del(ds, dp->index, 1063 &mall_tc_entry->mirror); 1064 break; 1065 case DSA_PORT_MALL_POLICER: 1066 if (ds->ops->port_policer_del) 1067 ds->ops->port_policer_del(ds, dp->index); 1068 break; 1069 default: 1070 WARN_ON(1); 1071 } 1072 1073 kfree(mall_tc_entry); 1074 } 1075 1076 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1077 struct tc_cls_matchall_offload *cls, 1078 bool ingress) 1079 { 1080 if (cls->common.chain_index) 1081 return -EOPNOTSUPP; 1082 1083 switch (cls->command) { 1084 case TC_CLSMATCHALL_REPLACE: 1085 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1086 case TC_CLSMATCHALL_DESTROY: 1087 dsa_slave_del_cls_matchall(dev, cls); 1088 return 0; 1089 default: 1090 return -EOPNOTSUPP; 1091 } 1092 } 1093 1094 static int dsa_slave_add_cls_flower(struct net_device *dev, 1095 struct flow_cls_offload *cls, 1096 bool ingress) 1097 { 1098 struct dsa_port *dp = dsa_slave_to_port(dev); 1099 struct dsa_switch *ds = dp->ds; 1100 int port = dp->index; 1101 1102 if (!ds->ops->cls_flower_add) 1103 return -EOPNOTSUPP; 1104 1105 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1106 } 1107 1108 static int dsa_slave_del_cls_flower(struct net_device *dev, 1109 struct flow_cls_offload *cls, 1110 bool ingress) 1111 { 1112 struct dsa_port *dp = dsa_slave_to_port(dev); 1113 struct dsa_switch *ds = dp->ds; 1114 int port = dp->index; 1115 1116 if (!ds->ops->cls_flower_del) 1117 return -EOPNOTSUPP; 1118 1119 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1120 } 1121 1122 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1123 struct flow_cls_offload *cls, 1124 bool ingress) 1125 { 1126 struct dsa_port *dp = dsa_slave_to_port(dev); 1127 struct dsa_switch *ds = dp->ds; 1128 int port = dp->index; 1129 1130 if (!ds->ops->cls_flower_stats) 1131 return -EOPNOTSUPP; 1132 1133 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1134 } 1135 1136 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1137 struct flow_cls_offload *cls, 1138 bool ingress) 1139 { 1140 switch (cls->command) { 1141 case FLOW_CLS_REPLACE: 1142 return dsa_slave_add_cls_flower(dev, cls, ingress); 1143 case FLOW_CLS_DESTROY: 1144 return dsa_slave_del_cls_flower(dev, cls, ingress); 1145 case FLOW_CLS_STATS: 1146 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1147 default: 1148 return -EOPNOTSUPP; 1149 } 1150 } 1151 1152 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1153 void *cb_priv, bool ingress) 1154 { 1155 struct net_device *dev = cb_priv; 1156 1157 if (!tc_can_offload(dev)) 1158 return -EOPNOTSUPP; 1159 1160 switch (type) { 1161 case TC_SETUP_CLSMATCHALL: 1162 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1163 case TC_SETUP_CLSFLOWER: 1164 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1165 default: 1166 return -EOPNOTSUPP; 1167 } 1168 } 1169 1170 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1171 void *type_data, void *cb_priv) 1172 { 1173 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1174 } 1175 1176 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1177 void *type_data, void *cb_priv) 1178 { 1179 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1180 } 1181 1182 static LIST_HEAD(dsa_slave_block_cb_list); 1183 1184 static int dsa_slave_setup_tc_block(struct net_device *dev, 1185 struct flow_block_offload *f) 1186 { 1187 struct flow_block_cb *block_cb; 1188 flow_setup_cb_t *cb; 1189 1190 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1191 cb = dsa_slave_setup_tc_block_cb_ig; 1192 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1193 cb = dsa_slave_setup_tc_block_cb_eg; 1194 else 1195 return -EOPNOTSUPP; 1196 1197 f->driver_block_list = &dsa_slave_block_cb_list; 1198 1199 switch (f->command) { 1200 case FLOW_BLOCK_BIND: 1201 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1202 return -EBUSY; 1203 1204 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1205 if (IS_ERR(block_cb)) 1206 return PTR_ERR(block_cb); 1207 1208 flow_block_cb_add(block_cb, f); 1209 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1210 return 0; 1211 case FLOW_BLOCK_UNBIND: 1212 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1213 if (!block_cb) 1214 return -ENOENT; 1215 1216 flow_block_cb_remove(block_cb, f); 1217 list_del(&block_cb->driver_list); 1218 return 0; 1219 default: 1220 return -EOPNOTSUPP; 1221 } 1222 } 1223 1224 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1225 void *type_data) 1226 { 1227 struct dsa_port *dp = dsa_slave_to_port(dev); 1228 struct dsa_switch *ds = dp->ds; 1229 1230 if (type == TC_SETUP_BLOCK) 1231 return dsa_slave_setup_tc_block(dev, type_data); 1232 1233 if (!ds->ops->port_setup_tc) 1234 return -EOPNOTSUPP; 1235 1236 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1237 } 1238 1239 static int dsa_slave_get_rxnfc(struct net_device *dev, 1240 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1241 { 1242 struct dsa_port *dp = dsa_slave_to_port(dev); 1243 struct dsa_switch *ds = dp->ds; 1244 1245 if (!ds->ops->get_rxnfc) 1246 return -EOPNOTSUPP; 1247 1248 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1249 } 1250 1251 static int dsa_slave_set_rxnfc(struct net_device *dev, 1252 struct ethtool_rxnfc *nfc) 1253 { 1254 struct dsa_port *dp = dsa_slave_to_port(dev); 1255 struct dsa_switch *ds = dp->ds; 1256 1257 if (!ds->ops->set_rxnfc) 1258 return -EOPNOTSUPP; 1259 1260 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1261 } 1262 1263 static int dsa_slave_get_ts_info(struct net_device *dev, 1264 struct ethtool_ts_info *ts) 1265 { 1266 struct dsa_slave_priv *p = netdev_priv(dev); 1267 struct dsa_switch *ds = p->dp->ds; 1268 1269 if (!ds->ops->get_ts_info) 1270 return -EOPNOTSUPP; 1271 1272 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1273 } 1274 1275 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1276 u16 vid) 1277 { 1278 struct net_device *master = dsa_slave_to_master(dev); 1279 struct dsa_port *dp = dsa_slave_to_port(dev); 1280 struct switchdev_obj_port_vlan vlan = { 1281 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1282 .vid = vid, 1283 /* This API only allows programming tagged, non-PVID VIDs */ 1284 .flags = 0, 1285 }; 1286 int ret; 1287 1288 /* User port... */ 1289 ret = dsa_port_vlan_add(dp, &vlan); 1290 if (ret) 1291 return ret; 1292 1293 /* And CPU port... */ 1294 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan); 1295 if (ret) 1296 return ret; 1297 1298 return vlan_vid_add(master, proto, vid); 1299 } 1300 1301 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1302 u16 vid) 1303 { 1304 struct net_device *master = dsa_slave_to_master(dev); 1305 struct dsa_port *dp = dsa_slave_to_port(dev); 1306 struct switchdev_obj_port_vlan vlan = { 1307 .vid = vid, 1308 /* This API only allows programming tagged, non-PVID VIDs */ 1309 .flags = 0, 1310 }; 1311 int err; 1312 1313 /* Do not deprogram the CPU port as it may be shared with other user 1314 * ports which can be members of this VLAN as well. 1315 */ 1316 err = dsa_port_vlan_del(dp, &vlan); 1317 if (err) 1318 return err; 1319 1320 vlan_vid_del(master, proto, vid); 1321 1322 return 0; 1323 } 1324 1325 struct dsa_hw_port { 1326 struct list_head list; 1327 struct net_device *dev; 1328 int old_mtu; 1329 }; 1330 1331 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1332 { 1333 const struct dsa_hw_port *p; 1334 int err; 1335 1336 list_for_each_entry(p, hw_port_list, list) { 1337 if (p->dev->mtu == mtu) 1338 continue; 1339 1340 err = dev_set_mtu(p->dev, mtu); 1341 if (err) 1342 goto rollback; 1343 } 1344 1345 return 0; 1346 1347 rollback: 1348 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1349 if (p->dev->mtu == p->old_mtu) 1350 continue; 1351 1352 if (dev_set_mtu(p->dev, p->old_mtu)) 1353 netdev_err(p->dev, "Failed to restore MTU\n"); 1354 } 1355 1356 return err; 1357 } 1358 1359 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1360 { 1361 struct dsa_hw_port *p, *n; 1362 1363 list_for_each_entry_safe(p, n, hw_port_list, list) 1364 kfree(p); 1365 } 1366 1367 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1368 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1369 { 1370 struct list_head hw_port_list; 1371 struct dsa_switch_tree *dst; 1372 int min_mtu = ETH_MAX_MTU; 1373 struct dsa_port *other_dp; 1374 int err; 1375 1376 if (!dp->ds->mtu_enforcement_ingress) 1377 return; 1378 1379 if (!dp->bridge_dev) 1380 return; 1381 1382 INIT_LIST_HEAD(&hw_port_list); 1383 1384 /* Populate the list of ports that are part of the same bridge 1385 * as the newly added/modified port 1386 */ 1387 list_for_each_entry(dst, &dsa_tree_list, list) { 1388 list_for_each_entry(other_dp, &dst->ports, list) { 1389 struct dsa_hw_port *hw_port; 1390 struct net_device *slave; 1391 1392 if (other_dp->type != DSA_PORT_TYPE_USER) 1393 continue; 1394 1395 if (other_dp->bridge_dev != dp->bridge_dev) 1396 continue; 1397 1398 if (!other_dp->ds->mtu_enforcement_ingress) 1399 continue; 1400 1401 slave = other_dp->slave; 1402 1403 if (min_mtu > slave->mtu) 1404 min_mtu = slave->mtu; 1405 1406 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1407 if (!hw_port) 1408 goto out; 1409 1410 hw_port->dev = slave; 1411 hw_port->old_mtu = slave->mtu; 1412 1413 list_add(&hw_port->list, &hw_port_list); 1414 } 1415 } 1416 1417 /* Attempt to configure the entire hardware bridge to the newly added 1418 * interface's MTU first, regardless of whether the intention of the 1419 * user was to raise or lower it. 1420 */ 1421 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1422 if (!err) 1423 goto out; 1424 1425 /* Clearly that didn't work out so well, so just set the minimum MTU on 1426 * all hardware bridge ports now. If this fails too, then all ports will 1427 * still have their old MTU rolled back anyway. 1428 */ 1429 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1430 1431 out: 1432 dsa_hw_port_list_free(&hw_port_list); 1433 } 1434 1435 static int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1436 { 1437 struct net_device *master = dsa_slave_to_master(dev); 1438 struct dsa_port *dp = dsa_slave_to_port(dev); 1439 struct dsa_slave_priv *p = netdev_priv(dev); 1440 struct dsa_switch *ds = p->dp->ds; 1441 struct dsa_port *cpu_dp; 1442 int port = p->dp->index; 1443 int largest_mtu = 0; 1444 int new_master_mtu; 1445 int old_master_mtu; 1446 int mtu_limit; 1447 int cpu_mtu; 1448 int err, i; 1449 1450 if (!ds->ops->port_change_mtu) 1451 return -EOPNOTSUPP; 1452 1453 for (i = 0; i < ds->num_ports; i++) { 1454 int slave_mtu; 1455 1456 if (!dsa_is_user_port(ds, i)) 1457 continue; 1458 1459 /* During probe, this function will be called for each slave 1460 * device, while not all of them have been allocated. That's 1461 * ok, it doesn't change what the maximum is, so ignore it. 1462 */ 1463 if (!dsa_to_port(ds, i)->slave) 1464 continue; 1465 1466 /* Pretend that we already applied the setting, which we 1467 * actually haven't (still haven't done all integrity checks) 1468 */ 1469 if (i == port) 1470 slave_mtu = new_mtu; 1471 else 1472 slave_mtu = dsa_to_port(ds, i)->slave->mtu; 1473 1474 if (largest_mtu < slave_mtu) 1475 largest_mtu = slave_mtu; 1476 } 1477 1478 cpu_dp = dsa_to_port(ds, port)->cpu_dp; 1479 1480 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1481 old_master_mtu = master->mtu; 1482 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead; 1483 if (new_master_mtu > mtu_limit) 1484 return -ERANGE; 1485 1486 /* If the master MTU isn't over limit, there's no need to check the CPU 1487 * MTU, since that surely isn't either. 1488 */ 1489 cpu_mtu = largest_mtu; 1490 1491 /* Start applying stuff */ 1492 if (new_master_mtu != old_master_mtu) { 1493 err = dev_set_mtu(master, new_master_mtu); 1494 if (err < 0) 1495 goto out_master_failed; 1496 1497 /* We only need to propagate the MTU of the CPU port to 1498 * upstream switches. 1499 */ 1500 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true); 1501 if (err) 1502 goto out_cpu_failed; 1503 } 1504 1505 err = dsa_port_mtu_change(dp, new_mtu, false); 1506 if (err) 1507 goto out_port_failed; 1508 1509 dev->mtu = new_mtu; 1510 1511 dsa_bridge_mtu_normalization(dp); 1512 1513 return 0; 1514 1515 out_port_failed: 1516 if (new_master_mtu != old_master_mtu) 1517 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1518 cpu_dp->tag_ops->overhead, 1519 true); 1520 out_cpu_failed: 1521 if (new_master_mtu != old_master_mtu) 1522 dev_set_mtu(master, old_master_mtu); 1523 out_master_failed: 1524 return err; 1525 } 1526 1527 static const struct ethtool_ops dsa_slave_ethtool_ops = { 1528 .get_drvinfo = dsa_slave_get_drvinfo, 1529 .get_regs_len = dsa_slave_get_regs_len, 1530 .get_regs = dsa_slave_get_regs, 1531 .nway_reset = dsa_slave_nway_reset, 1532 .get_link = ethtool_op_get_link, 1533 .get_eeprom_len = dsa_slave_get_eeprom_len, 1534 .get_eeprom = dsa_slave_get_eeprom, 1535 .set_eeprom = dsa_slave_set_eeprom, 1536 .get_strings = dsa_slave_get_strings, 1537 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 1538 .get_sset_count = dsa_slave_get_sset_count, 1539 .set_wol = dsa_slave_set_wol, 1540 .get_wol = dsa_slave_get_wol, 1541 .set_eee = dsa_slave_set_eee, 1542 .get_eee = dsa_slave_get_eee, 1543 .get_link_ksettings = dsa_slave_get_link_ksettings, 1544 .set_link_ksettings = dsa_slave_set_link_ksettings, 1545 .get_pauseparam = dsa_slave_get_pauseparam, 1546 .set_pauseparam = dsa_slave_set_pauseparam, 1547 .get_rxnfc = dsa_slave_get_rxnfc, 1548 .set_rxnfc = dsa_slave_set_rxnfc, 1549 .get_ts_info = dsa_slave_get_ts_info, 1550 }; 1551 1552 /* legacy way, bypassing the bridge *****************************************/ 1553 static int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 1554 struct net_device *dev, 1555 const unsigned char *addr, u16 vid, 1556 u16 flags, 1557 struct netlink_ext_ack *extack) 1558 { 1559 struct dsa_port *dp = dsa_slave_to_port(dev); 1560 1561 return dsa_port_fdb_add(dp, addr, vid); 1562 } 1563 1564 static int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 1565 struct net_device *dev, 1566 const unsigned char *addr, u16 vid) 1567 { 1568 struct dsa_port *dp = dsa_slave_to_port(dev); 1569 1570 return dsa_port_fdb_del(dp, addr, vid); 1571 } 1572 1573 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) 1574 { 1575 struct dsa_port *dp = dsa_slave_to_port(dev); 1576 1577 return dp->ds->devlink ? &dp->devlink_port : NULL; 1578 } 1579 1580 static const struct net_device_ops dsa_slave_netdev_ops = { 1581 .ndo_open = dsa_slave_open, 1582 .ndo_stop = dsa_slave_close, 1583 .ndo_start_xmit = dsa_slave_xmit, 1584 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 1585 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 1586 .ndo_set_mac_address = dsa_slave_set_mac_address, 1587 .ndo_fdb_add = dsa_legacy_fdb_add, 1588 .ndo_fdb_del = dsa_legacy_fdb_del, 1589 .ndo_fdb_dump = dsa_slave_fdb_dump, 1590 .ndo_do_ioctl = dsa_slave_ioctl, 1591 .ndo_get_iflink = dsa_slave_get_iflink, 1592 #ifdef CONFIG_NET_POLL_CONTROLLER 1593 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 1594 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 1595 .ndo_poll_controller = dsa_slave_poll_controller, 1596 #endif 1597 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 1598 .ndo_setup_tc = dsa_slave_setup_tc, 1599 .ndo_get_stats64 = dev_get_tstats64, 1600 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id, 1601 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 1602 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 1603 .ndo_get_devlink_port = dsa_slave_get_devlink_port, 1604 .ndo_change_mtu = dsa_slave_change_mtu, 1605 }; 1606 1607 static struct device_type dsa_type = { 1608 .name = "dsa", 1609 }; 1610 1611 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 1612 { 1613 const struct dsa_port *dp = dsa_to_port(ds, port); 1614 1615 if (dp->pl) 1616 phylink_mac_change(dp->pl, up); 1617 } 1618 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 1619 1620 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 1621 struct phylink_link_state *state) 1622 { 1623 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1624 struct dsa_switch *ds = dp->ds; 1625 1626 /* No need to check that this operation is valid, the callback would 1627 * not be called if it was not. 1628 */ 1629 ds->ops->phylink_fixed_state(ds, dp->index, state); 1630 } 1631 1632 /* slave device setup *******************************************************/ 1633 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) 1634 { 1635 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1636 struct dsa_switch *ds = dp->ds; 1637 1638 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 1639 if (!slave_dev->phydev) { 1640 netdev_err(slave_dev, "no phy at %d\n", addr); 1641 return -ENODEV; 1642 } 1643 1644 return phylink_connect_phy(dp->pl, slave_dev->phydev); 1645 } 1646 1647 static int dsa_slave_phy_setup(struct net_device *slave_dev) 1648 { 1649 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1650 struct device_node *port_dn = dp->dn; 1651 struct dsa_switch *ds = dp->ds; 1652 phy_interface_t mode; 1653 u32 phy_flags = 0; 1654 int ret; 1655 1656 ret = of_get_phy_mode(port_dn, &mode); 1657 if (ret) 1658 mode = PHY_INTERFACE_MODE_NA; 1659 1660 dp->pl_config.dev = &slave_dev->dev; 1661 dp->pl_config.type = PHYLINK_NETDEV; 1662 1663 /* The get_fixed_state callback takes precedence over polling the 1664 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 1665 * this if the switch provides such a callback. 1666 */ 1667 if (ds->ops->phylink_fixed_state) { 1668 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 1669 dp->pl_config.poll_fixed_state = true; 1670 } 1671 1672 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode, 1673 &dsa_port_phylink_mac_ops); 1674 if (IS_ERR(dp->pl)) { 1675 netdev_err(slave_dev, 1676 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 1677 return PTR_ERR(dp->pl); 1678 } 1679 1680 if (ds->ops->get_phy_flags) 1681 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 1682 1683 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 1684 if (ret == -ENODEV && ds->slave_mii_bus) { 1685 /* We could not connect to a designated PHY or SFP, so try to 1686 * use the switch internal MDIO bus instead 1687 */ 1688 ret = dsa_slave_phy_connect(slave_dev, dp->index); 1689 if (ret) { 1690 netdev_err(slave_dev, 1691 "failed to connect to port %d: %d\n", 1692 dp->index, ret); 1693 phylink_destroy(dp->pl); 1694 return ret; 1695 } 1696 } 1697 1698 return ret; 1699 } 1700 1701 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1702 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1703 struct netdev_queue *txq, 1704 void *_unused) 1705 { 1706 lockdep_set_class(&txq->_xmit_lock, 1707 &dsa_slave_netdev_xmit_lock_key); 1708 } 1709 1710 int dsa_slave_suspend(struct net_device *slave_dev) 1711 { 1712 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1713 1714 if (!netif_running(slave_dev)) 1715 return 0; 1716 1717 netif_device_detach(slave_dev); 1718 1719 rtnl_lock(); 1720 phylink_stop(dp->pl); 1721 rtnl_unlock(); 1722 1723 return 0; 1724 } 1725 1726 int dsa_slave_resume(struct net_device *slave_dev) 1727 { 1728 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1729 1730 if (!netif_running(slave_dev)) 1731 return 0; 1732 1733 netif_device_attach(slave_dev); 1734 1735 rtnl_lock(); 1736 phylink_start(dp->pl); 1737 rtnl_unlock(); 1738 1739 return 0; 1740 } 1741 1742 int dsa_slave_create(struct dsa_port *port) 1743 { 1744 const struct dsa_port *cpu_dp = port->cpu_dp; 1745 struct net_device *master = cpu_dp->master; 1746 struct dsa_switch *ds = port->ds; 1747 const char *name = port->name; 1748 struct net_device *slave_dev; 1749 struct dsa_slave_priv *p; 1750 int ret; 1751 1752 if (!ds->num_tx_queues) 1753 ds->num_tx_queues = 1; 1754 1755 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 1756 NET_NAME_UNKNOWN, ether_setup, 1757 ds->num_tx_queues, 1); 1758 if (slave_dev == NULL) 1759 return -ENOMEM; 1760 1761 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1762 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del) 1763 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1764 slave_dev->hw_features |= NETIF_F_HW_TC; 1765 slave_dev->features |= NETIF_F_LLTX; 1766 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1767 if (!IS_ERR_OR_NULL(port->mac)) 1768 ether_addr_copy(slave_dev->dev_addr, port->mac); 1769 else 1770 eth_hw_addr_inherit(slave_dev, master); 1771 slave_dev->priv_flags |= IFF_NO_QUEUE; 1772 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1773 if (ds->ops->port_max_mtu) 1774 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 1775 if (cpu_dp->tag_ops->tail_tag) 1776 slave_dev->needed_tailroom = cpu_dp->tag_ops->overhead; 1777 else 1778 slave_dev->needed_headroom = cpu_dp->tag_ops->overhead; 1779 /* Try to save one extra realloc later in the TX path (in the master) 1780 * by also inheriting the master's needed headroom and tailroom. 1781 * The 8021q driver also does this. 1782 */ 1783 slave_dev->needed_headroom += master->needed_headroom; 1784 slave_dev->needed_tailroom += master->needed_tailroom; 1785 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1786 1787 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1788 NULL); 1789 1790 SET_NETDEV_DEV(slave_dev, port->ds->dev); 1791 slave_dev->dev.of_node = port->dn; 1792 slave_dev->vlan_features = master->vlan_features; 1793 1794 p = netdev_priv(slave_dev); 1795 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1796 if (!slave_dev->tstats) { 1797 free_netdev(slave_dev); 1798 return -ENOMEM; 1799 } 1800 1801 ret = gro_cells_init(&p->gcells, slave_dev); 1802 if (ret) 1803 goto out_free; 1804 1805 p->dp = port; 1806 INIT_LIST_HEAD(&p->mall_tc_list); 1807 p->xmit = cpu_dp->tag_ops->xmit; 1808 port->slave = slave_dev; 1809 1810 rtnl_lock(); 1811 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 1812 rtnl_unlock(); 1813 if (ret && ret != -EOPNOTSUPP) 1814 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 1815 ret, ETH_DATA_LEN, port->index); 1816 1817 netif_carrier_off(slave_dev); 1818 1819 ret = dsa_slave_phy_setup(slave_dev); 1820 if (ret) { 1821 netdev_err(slave_dev, 1822 "error %d setting up PHY for tree %d, switch %d, port %d\n", 1823 ret, ds->dst->index, ds->index, port->index); 1824 goto out_gcells; 1825 } 1826 1827 rtnl_lock(); 1828 1829 ret = register_netdevice(slave_dev); 1830 if (ret) { 1831 netdev_err(master, "error %d registering interface %s\n", 1832 ret, slave_dev->name); 1833 rtnl_unlock(); 1834 goto out_phy; 1835 } 1836 1837 ret = netdev_upper_dev_link(master, slave_dev, NULL); 1838 1839 rtnl_unlock(); 1840 1841 if (ret) 1842 goto out_unregister; 1843 1844 return 0; 1845 1846 out_unregister: 1847 unregister_netdev(slave_dev); 1848 out_phy: 1849 rtnl_lock(); 1850 phylink_disconnect_phy(p->dp->pl); 1851 rtnl_unlock(); 1852 phylink_destroy(p->dp->pl); 1853 out_gcells: 1854 gro_cells_destroy(&p->gcells); 1855 out_free: 1856 free_percpu(slave_dev->tstats); 1857 free_netdev(slave_dev); 1858 port->slave = NULL; 1859 return ret; 1860 } 1861 1862 void dsa_slave_destroy(struct net_device *slave_dev) 1863 { 1864 struct net_device *master = dsa_slave_to_master(slave_dev); 1865 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1866 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1867 1868 netif_carrier_off(slave_dev); 1869 rtnl_lock(); 1870 netdev_upper_dev_unlink(master, slave_dev); 1871 unregister_netdevice(slave_dev); 1872 phylink_disconnect_phy(dp->pl); 1873 rtnl_unlock(); 1874 1875 phylink_destroy(dp->pl); 1876 gro_cells_destroy(&p->gcells); 1877 free_percpu(slave_dev->tstats); 1878 free_netdev(slave_dev); 1879 } 1880 1881 bool dsa_slave_dev_check(const struct net_device *dev) 1882 { 1883 return dev->netdev_ops == &dsa_slave_netdev_ops; 1884 } 1885 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 1886 1887 static int dsa_slave_changeupper(struct net_device *dev, 1888 struct netdev_notifier_changeupper_info *info) 1889 { 1890 struct dsa_port *dp = dsa_slave_to_port(dev); 1891 int err = NOTIFY_DONE; 1892 1893 if (netif_is_bridge_master(info->upper_dev)) { 1894 if (info->linking) { 1895 err = dsa_port_bridge_join(dp, info->upper_dev); 1896 if (!err) 1897 dsa_bridge_mtu_normalization(dp); 1898 err = notifier_from_errno(err); 1899 } else { 1900 dsa_port_bridge_leave(dp, info->upper_dev); 1901 err = NOTIFY_OK; 1902 } 1903 } 1904 1905 return err; 1906 } 1907 1908 static int 1909 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 1910 struct netdev_notifier_changeupper_info *info) 1911 { 1912 struct netlink_ext_ack *ext_ack; 1913 struct net_device *slave; 1914 struct dsa_port *dp; 1915 1916 ext_ack = netdev_notifier_info_to_extack(&info->info); 1917 1918 if (!is_vlan_dev(dev)) 1919 return NOTIFY_DONE; 1920 1921 slave = vlan_dev_real_dev(dev); 1922 if (!dsa_slave_dev_check(slave)) 1923 return NOTIFY_DONE; 1924 1925 dp = dsa_slave_to_port(slave); 1926 if (!dp->bridge_dev) 1927 return NOTIFY_DONE; 1928 1929 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 1930 if (br_vlan_enabled(dp->bridge_dev) && 1931 netif_is_bridge_master(info->upper_dev) && info->linking) { 1932 NL_SET_ERR_MSG_MOD(ext_ack, 1933 "Cannot enslave VLAN device into VLAN aware bridge"); 1934 return notifier_from_errno(-EINVAL); 1935 } 1936 1937 return NOTIFY_DONE; 1938 } 1939 1940 static int 1941 dsa_slave_check_8021q_upper(struct net_device *dev, 1942 struct netdev_notifier_changeupper_info *info) 1943 { 1944 struct dsa_port *dp = dsa_slave_to_port(dev); 1945 struct net_device *br = dp->bridge_dev; 1946 struct bridge_vlan_info br_info; 1947 struct netlink_ext_ack *extack; 1948 int err = NOTIFY_DONE; 1949 u16 vid; 1950 1951 if (!br || !br_vlan_enabled(br)) 1952 return NOTIFY_DONE; 1953 1954 extack = netdev_notifier_info_to_extack(&info->info); 1955 vid = vlan_dev_vlan_id(info->upper_dev); 1956 1957 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 1958 * device, respectively the VID is not found, returning 1959 * 0 means success, which is a failure for us here. 1960 */ 1961 err = br_vlan_get_info(br, vid, &br_info); 1962 if (err == 0) { 1963 NL_SET_ERR_MSG_MOD(extack, 1964 "This VLAN is already configured by the bridge"); 1965 return notifier_from_errno(-EBUSY); 1966 } 1967 1968 return NOTIFY_DONE; 1969 } 1970 1971 static int dsa_slave_netdevice_event(struct notifier_block *nb, 1972 unsigned long event, void *ptr) 1973 { 1974 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1975 1976 switch (event) { 1977 case NETDEV_PRECHANGEUPPER: { 1978 struct netdev_notifier_changeupper_info *info = ptr; 1979 struct dsa_switch *ds; 1980 struct dsa_port *dp; 1981 int err; 1982 1983 if (!dsa_slave_dev_check(dev)) 1984 return dsa_prevent_bridging_8021q_upper(dev, ptr); 1985 1986 dp = dsa_slave_to_port(dev); 1987 ds = dp->ds; 1988 1989 if (ds->ops->port_prechangeupper) { 1990 err = ds->ops->port_prechangeupper(ds, dp->index, info); 1991 if (err) 1992 return notifier_from_errno(err); 1993 } 1994 1995 if (is_vlan_dev(info->upper_dev)) 1996 return dsa_slave_check_8021q_upper(dev, ptr); 1997 break; 1998 } 1999 case NETDEV_CHANGEUPPER: 2000 if (!dsa_slave_dev_check(dev)) 2001 return NOTIFY_DONE; 2002 2003 return dsa_slave_changeupper(dev, ptr); 2004 } 2005 2006 return NOTIFY_DONE; 2007 } 2008 2009 static void 2010 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 2011 { 2012 struct dsa_switch *ds = switchdev_work->ds; 2013 struct switchdev_notifier_fdb_info info; 2014 struct dsa_port *dp; 2015 2016 if (!dsa_is_user_port(ds, switchdev_work->port)) 2017 return; 2018 2019 info.addr = switchdev_work->addr; 2020 info.vid = switchdev_work->vid; 2021 info.offloaded = true; 2022 dp = dsa_to_port(ds, switchdev_work->port); 2023 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 2024 dp->slave, &info.info, NULL); 2025 } 2026 2027 static void dsa_slave_switchdev_event_work(struct work_struct *work) 2028 { 2029 struct dsa_switchdev_event_work *switchdev_work = 2030 container_of(work, struct dsa_switchdev_event_work, work); 2031 struct dsa_switch *ds = switchdev_work->ds; 2032 struct dsa_port *dp; 2033 int err; 2034 2035 dp = dsa_to_port(ds, switchdev_work->port); 2036 2037 rtnl_lock(); 2038 switch (switchdev_work->event) { 2039 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2040 err = dsa_port_fdb_add(dp, switchdev_work->addr, 2041 switchdev_work->vid); 2042 if (err) { 2043 dev_err(ds->dev, 2044 "port %d failed to add %pM vid %d to fdb: %d\n", 2045 dp->index, switchdev_work->addr, 2046 switchdev_work->vid, err); 2047 break; 2048 } 2049 dsa_fdb_offload_notify(switchdev_work); 2050 break; 2051 2052 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2053 err = dsa_port_fdb_del(dp, switchdev_work->addr, 2054 switchdev_work->vid); 2055 if (err) { 2056 dev_err(ds->dev, 2057 "port %d failed to delete %pM vid %d from fdb: %d\n", 2058 dp->index, switchdev_work->addr, 2059 switchdev_work->vid, err); 2060 } 2061 2062 break; 2063 } 2064 rtnl_unlock(); 2065 2066 kfree(switchdev_work); 2067 if (dsa_is_user_port(ds, dp->index)) 2068 dev_put(dp->slave); 2069 } 2070 2071 static int dsa_lower_dev_walk(struct net_device *lower_dev, 2072 struct netdev_nested_priv *priv) 2073 { 2074 if (dsa_slave_dev_check(lower_dev)) { 2075 priv->data = (void *)netdev_priv(lower_dev); 2076 return 1; 2077 } 2078 2079 return 0; 2080 } 2081 2082 static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev) 2083 { 2084 struct netdev_nested_priv priv = { 2085 .data = NULL, 2086 }; 2087 2088 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv); 2089 2090 return (struct dsa_slave_priv *)priv.data; 2091 } 2092 2093 /* Called under rcu_read_lock() */ 2094 static int dsa_slave_switchdev_event(struct notifier_block *unused, 2095 unsigned long event, void *ptr) 2096 { 2097 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2098 const struct switchdev_notifier_fdb_info *fdb_info; 2099 struct dsa_switchdev_event_work *switchdev_work; 2100 struct dsa_port *dp; 2101 int err; 2102 2103 switch (event) { 2104 case SWITCHDEV_PORT_ATTR_SET: 2105 err = switchdev_handle_port_attr_set(dev, ptr, 2106 dsa_slave_dev_check, 2107 dsa_slave_port_attr_set); 2108 return notifier_from_errno(err); 2109 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2110 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2111 fdb_info = ptr; 2112 2113 if (dsa_slave_dev_check(dev)) { 2114 if (!fdb_info->added_by_user) 2115 return NOTIFY_OK; 2116 2117 dp = dsa_slave_to_port(dev); 2118 } else { 2119 /* Snoop addresses learnt on foreign interfaces 2120 * bridged with us, for switches that don't 2121 * automatically learn SA from CPU-injected traffic 2122 */ 2123 struct net_device *br_dev; 2124 struct dsa_slave_priv *p; 2125 2126 br_dev = netdev_master_upper_dev_get_rcu(dev); 2127 if (!br_dev) 2128 return NOTIFY_DONE; 2129 2130 if (!netif_is_bridge_master(br_dev)) 2131 return NOTIFY_DONE; 2132 2133 p = dsa_slave_dev_lower_find(br_dev); 2134 if (!p) 2135 return NOTIFY_DONE; 2136 2137 dp = p->dp->cpu_dp; 2138 2139 if (!dp->ds->assisted_learning_on_cpu_port) 2140 return NOTIFY_DONE; 2141 } 2142 2143 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del) 2144 return NOTIFY_DONE; 2145 2146 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 2147 if (!switchdev_work) 2148 return NOTIFY_BAD; 2149 2150 INIT_WORK(&switchdev_work->work, 2151 dsa_slave_switchdev_event_work); 2152 switchdev_work->ds = dp->ds; 2153 switchdev_work->port = dp->index; 2154 switchdev_work->event = event; 2155 2156 ether_addr_copy(switchdev_work->addr, 2157 fdb_info->addr); 2158 switchdev_work->vid = fdb_info->vid; 2159 2160 /* Hold a reference on the slave for dsa_fdb_offload_notify */ 2161 if (dsa_is_user_port(dp->ds, dp->index)) 2162 dev_hold(dev); 2163 dsa_schedule_work(&switchdev_work->work); 2164 break; 2165 default: 2166 return NOTIFY_DONE; 2167 } 2168 2169 return NOTIFY_OK; 2170 } 2171 2172 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 2173 unsigned long event, void *ptr) 2174 { 2175 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2176 int err; 2177 2178 switch (event) { 2179 case SWITCHDEV_PORT_OBJ_ADD: 2180 err = switchdev_handle_port_obj_add(dev, ptr, 2181 dsa_slave_dev_check, 2182 dsa_slave_port_obj_add); 2183 return notifier_from_errno(err); 2184 case SWITCHDEV_PORT_OBJ_DEL: 2185 err = switchdev_handle_port_obj_del(dev, ptr, 2186 dsa_slave_dev_check, 2187 dsa_slave_port_obj_del); 2188 return notifier_from_errno(err); 2189 case SWITCHDEV_PORT_ATTR_SET: 2190 err = switchdev_handle_port_attr_set(dev, ptr, 2191 dsa_slave_dev_check, 2192 dsa_slave_port_attr_set); 2193 return notifier_from_errno(err); 2194 } 2195 2196 return NOTIFY_DONE; 2197 } 2198 2199 static struct notifier_block dsa_slave_nb __read_mostly = { 2200 .notifier_call = dsa_slave_netdevice_event, 2201 }; 2202 2203 static struct notifier_block dsa_slave_switchdev_notifier = { 2204 .notifier_call = dsa_slave_switchdev_event, 2205 }; 2206 2207 static struct notifier_block dsa_slave_switchdev_blocking_notifier = { 2208 .notifier_call = dsa_slave_switchdev_blocking_event, 2209 }; 2210 2211 int dsa_slave_register_notifier(void) 2212 { 2213 struct notifier_block *nb; 2214 int err; 2215 2216 err = register_netdevice_notifier(&dsa_slave_nb); 2217 if (err) 2218 return err; 2219 2220 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 2221 if (err) 2222 goto err_switchdev_nb; 2223 2224 nb = &dsa_slave_switchdev_blocking_notifier; 2225 err = register_switchdev_blocking_notifier(nb); 2226 if (err) 2227 goto err_switchdev_blocking_nb; 2228 2229 return 0; 2230 2231 err_switchdev_blocking_nb: 2232 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2233 err_switchdev_nb: 2234 unregister_netdevice_notifier(&dsa_slave_nb); 2235 return err; 2236 } 2237 2238 void dsa_slave_unregister_notifier(void) 2239 { 2240 struct notifier_block *nb; 2241 int err; 2242 2243 nb = &dsa_slave_switchdev_blocking_notifier; 2244 err = unregister_switchdev_blocking_notifier(nb); 2245 if (err) 2246 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 2247 2248 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2249 if (err) 2250 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 2251 2252 err = unregister_netdevice_notifier(&dsa_slave_nb); 2253 if (err) 2254 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 2255 } 2256