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/selftests.h> 19 #include <net/tc_act/tc_mirred.h> 20 #include <linux/if_bridge.h> 21 #include <linux/if_hsr.h> 22 #include <net/dcbnl.h> 23 #include <linux/netpoll.h> 24 25 #include "dsa.h" 26 #include "port.h" 27 #include "master.h" 28 #include "netlink.h" 29 #include "slave.h" 30 #include "tag.h" 31 32 struct dsa_switchdev_event_work { 33 struct net_device *dev; 34 struct net_device *orig_dev; 35 struct work_struct work; 36 unsigned long event; 37 /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and 38 * SWITCHDEV_FDB_DEL_TO_DEVICE 39 */ 40 unsigned char addr[ETH_ALEN]; 41 u16 vid; 42 bool host_addr; 43 }; 44 45 enum dsa_standalone_event { 46 DSA_UC_ADD, 47 DSA_UC_DEL, 48 DSA_MC_ADD, 49 DSA_MC_DEL, 50 }; 51 52 struct dsa_standalone_event_work { 53 struct work_struct work; 54 struct net_device *dev; 55 enum dsa_standalone_event event; 56 unsigned char addr[ETH_ALEN]; 57 u16 vid; 58 }; 59 60 static bool dsa_switch_supports_uc_filtering(struct dsa_switch *ds) 61 { 62 return ds->ops->port_fdb_add && ds->ops->port_fdb_del && 63 ds->fdb_isolation && !ds->vlan_filtering_is_global && 64 !ds->needs_standalone_vlan_filtering; 65 } 66 67 static bool dsa_switch_supports_mc_filtering(struct dsa_switch *ds) 68 { 69 return ds->ops->port_mdb_add && ds->ops->port_mdb_del && 70 ds->fdb_isolation && !ds->vlan_filtering_is_global && 71 !ds->needs_standalone_vlan_filtering; 72 } 73 74 static void dsa_slave_standalone_event_work(struct work_struct *work) 75 { 76 struct dsa_standalone_event_work *standalone_work = 77 container_of(work, struct dsa_standalone_event_work, work); 78 const unsigned char *addr = standalone_work->addr; 79 struct net_device *dev = standalone_work->dev; 80 struct dsa_port *dp = dsa_slave_to_port(dev); 81 struct switchdev_obj_port_mdb mdb; 82 struct dsa_switch *ds = dp->ds; 83 u16 vid = standalone_work->vid; 84 int err; 85 86 switch (standalone_work->event) { 87 case DSA_UC_ADD: 88 err = dsa_port_standalone_host_fdb_add(dp, addr, vid); 89 if (err) { 90 dev_err(ds->dev, 91 "port %d failed to add %pM vid %d to fdb: %d\n", 92 dp->index, addr, vid, err); 93 break; 94 } 95 break; 96 97 case DSA_UC_DEL: 98 err = dsa_port_standalone_host_fdb_del(dp, addr, vid); 99 if (err) { 100 dev_err(ds->dev, 101 "port %d failed to delete %pM vid %d from fdb: %d\n", 102 dp->index, addr, vid, err); 103 } 104 105 break; 106 case DSA_MC_ADD: 107 ether_addr_copy(mdb.addr, addr); 108 mdb.vid = vid; 109 110 err = dsa_port_standalone_host_mdb_add(dp, &mdb); 111 if (err) { 112 dev_err(ds->dev, 113 "port %d failed to add %pM vid %d to mdb: %d\n", 114 dp->index, addr, vid, err); 115 break; 116 } 117 break; 118 case DSA_MC_DEL: 119 ether_addr_copy(mdb.addr, addr); 120 mdb.vid = vid; 121 122 err = dsa_port_standalone_host_mdb_del(dp, &mdb); 123 if (err) { 124 dev_err(ds->dev, 125 "port %d failed to delete %pM vid %d from mdb: %d\n", 126 dp->index, addr, vid, err); 127 } 128 129 break; 130 } 131 132 kfree(standalone_work); 133 } 134 135 static int dsa_slave_schedule_standalone_work(struct net_device *dev, 136 enum dsa_standalone_event event, 137 const unsigned char *addr, 138 u16 vid) 139 { 140 struct dsa_standalone_event_work *standalone_work; 141 142 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC); 143 if (!standalone_work) 144 return -ENOMEM; 145 146 INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work); 147 standalone_work->event = event; 148 standalone_work->dev = dev; 149 150 ether_addr_copy(standalone_work->addr, addr); 151 standalone_work->vid = vid; 152 153 dsa_schedule_work(&standalone_work->work); 154 155 return 0; 156 } 157 158 static int dsa_slave_sync_uc(struct net_device *dev, 159 const unsigned char *addr) 160 { 161 struct net_device *master = dsa_slave_to_master(dev); 162 struct dsa_port *dp = dsa_slave_to_port(dev); 163 164 dev_uc_add(master, addr); 165 166 if (!dsa_switch_supports_uc_filtering(dp->ds)) 167 return 0; 168 169 return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0); 170 } 171 172 static int dsa_slave_unsync_uc(struct net_device *dev, 173 const unsigned char *addr) 174 { 175 struct net_device *master = dsa_slave_to_master(dev); 176 struct dsa_port *dp = dsa_slave_to_port(dev); 177 178 dev_uc_del(master, addr); 179 180 if (!dsa_switch_supports_uc_filtering(dp->ds)) 181 return 0; 182 183 return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0); 184 } 185 186 static int dsa_slave_sync_mc(struct net_device *dev, 187 const unsigned char *addr) 188 { 189 struct net_device *master = dsa_slave_to_master(dev); 190 struct dsa_port *dp = dsa_slave_to_port(dev); 191 192 dev_mc_add(master, addr); 193 194 if (!dsa_switch_supports_mc_filtering(dp->ds)) 195 return 0; 196 197 return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0); 198 } 199 200 static int dsa_slave_unsync_mc(struct net_device *dev, 201 const unsigned char *addr) 202 { 203 struct net_device *master = dsa_slave_to_master(dev); 204 struct dsa_port *dp = dsa_slave_to_port(dev); 205 206 dev_mc_del(master, addr); 207 208 if (!dsa_switch_supports_mc_filtering(dp->ds)) 209 return 0; 210 211 return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0); 212 } 213 214 void dsa_slave_sync_ha(struct net_device *dev) 215 { 216 struct dsa_port *dp = dsa_slave_to_port(dev); 217 struct dsa_switch *ds = dp->ds; 218 struct netdev_hw_addr *ha; 219 220 netif_addr_lock_bh(dev); 221 222 netdev_for_each_synced_mc_addr(ha, dev) 223 dsa_slave_sync_mc(dev, ha->addr); 224 225 netdev_for_each_synced_uc_addr(ha, dev) 226 dsa_slave_sync_uc(dev, ha->addr); 227 228 netif_addr_unlock_bh(dev); 229 230 if (dsa_switch_supports_uc_filtering(ds) || 231 dsa_switch_supports_mc_filtering(ds)) 232 dsa_flush_workqueue(); 233 } 234 235 void dsa_slave_unsync_ha(struct net_device *dev) 236 { 237 struct dsa_port *dp = dsa_slave_to_port(dev); 238 struct dsa_switch *ds = dp->ds; 239 struct netdev_hw_addr *ha; 240 241 netif_addr_lock_bh(dev); 242 243 netdev_for_each_synced_uc_addr(ha, dev) 244 dsa_slave_unsync_uc(dev, ha->addr); 245 246 netdev_for_each_synced_mc_addr(ha, dev) 247 dsa_slave_unsync_mc(dev, ha->addr); 248 249 netif_addr_unlock_bh(dev); 250 251 if (dsa_switch_supports_uc_filtering(ds) || 252 dsa_switch_supports_mc_filtering(ds)) 253 dsa_flush_workqueue(); 254 } 255 256 /* slave mii_bus handling ***************************************************/ 257 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 258 { 259 struct dsa_switch *ds = bus->priv; 260 261 if (ds->phys_mii_mask & (1 << addr)) 262 return ds->ops->phy_read(ds, addr, reg); 263 264 return 0xffff; 265 } 266 267 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 268 { 269 struct dsa_switch *ds = bus->priv; 270 271 if (ds->phys_mii_mask & (1 << addr)) 272 return ds->ops->phy_write(ds, addr, reg, val); 273 274 return 0; 275 } 276 277 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 278 { 279 ds->slave_mii_bus->priv = (void *)ds; 280 ds->slave_mii_bus->name = "dsa slave smi"; 281 ds->slave_mii_bus->read = dsa_slave_phy_read; 282 ds->slave_mii_bus->write = dsa_slave_phy_write; 283 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 284 ds->dst->index, ds->index); 285 ds->slave_mii_bus->parent = ds->dev; 286 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 287 } 288 289 290 /* slave device handling ****************************************************/ 291 static int dsa_slave_get_iflink(const struct net_device *dev) 292 { 293 return dsa_slave_to_master(dev)->ifindex; 294 } 295 296 static int dsa_slave_open(struct net_device *dev) 297 { 298 struct net_device *master = dsa_slave_to_master(dev); 299 struct dsa_port *dp = dsa_slave_to_port(dev); 300 struct dsa_switch *ds = dp->ds; 301 int err; 302 303 err = dev_open(master, NULL); 304 if (err < 0) { 305 netdev_err(dev, "failed to open master %s\n", master->name); 306 goto out; 307 } 308 309 if (dsa_switch_supports_uc_filtering(ds)) { 310 err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0); 311 if (err) 312 goto out; 313 } 314 315 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 316 err = dev_uc_add(master, dev->dev_addr); 317 if (err < 0) 318 goto del_host_addr; 319 } 320 321 err = dsa_port_enable_rt(dp, dev->phydev); 322 if (err) 323 goto del_unicast; 324 325 return 0; 326 327 del_unicast: 328 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 329 dev_uc_del(master, dev->dev_addr); 330 del_host_addr: 331 if (dsa_switch_supports_uc_filtering(ds)) 332 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 333 out: 334 return err; 335 } 336 337 static int dsa_slave_close(struct net_device *dev) 338 { 339 struct net_device *master = dsa_slave_to_master(dev); 340 struct dsa_port *dp = dsa_slave_to_port(dev); 341 struct dsa_switch *ds = dp->ds; 342 343 dsa_port_disable_rt(dp); 344 345 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 346 dev_uc_del(master, dev->dev_addr); 347 348 if (dsa_switch_supports_uc_filtering(ds)) 349 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 350 351 return 0; 352 } 353 354 static void dsa_slave_manage_host_flood(struct net_device *dev) 355 { 356 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI); 357 struct dsa_port *dp = dsa_slave_to_port(dev); 358 bool uc = dev->flags & IFF_PROMISC; 359 360 dsa_port_set_host_flood(dp, uc, mc); 361 } 362 363 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 364 { 365 struct net_device *master = dsa_slave_to_master(dev); 366 struct dsa_port *dp = dsa_slave_to_port(dev); 367 struct dsa_switch *ds = dp->ds; 368 369 if (change & IFF_ALLMULTI) 370 dev_set_allmulti(master, 371 dev->flags & IFF_ALLMULTI ? 1 : -1); 372 if (change & IFF_PROMISC) 373 dev_set_promiscuity(master, 374 dev->flags & IFF_PROMISC ? 1 : -1); 375 376 if (dsa_switch_supports_uc_filtering(ds) && 377 dsa_switch_supports_mc_filtering(ds)) 378 dsa_slave_manage_host_flood(dev); 379 } 380 381 static void dsa_slave_set_rx_mode(struct net_device *dev) 382 { 383 __dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc); 384 __dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc); 385 } 386 387 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 388 { 389 struct net_device *master = dsa_slave_to_master(dev); 390 struct dsa_port *dp = dsa_slave_to_port(dev); 391 struct dsa_switch *ds = dp->ds; 392 struct sockaddr *addr = a; 393 int err; 394 395 if (!is_valid_ether_addr(addr->sa_data)) 396 return -EADDRNOTAVAIL; 397 398 /* If the port is down, the address isn't synced yet to hardware or 399 * to the DSA master, so there is nothing to change. 400 */ 401 if (!(dev->flags & IFF_UP)) 402 goto out_change_dev_addr; 403 404 if (dsa_switch_supports_uc_filtering(ds)) { 405 err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0); 406 if (err) 407 return err; 408 } 409 410 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 411 err = dev_uc_add(master, addr->sa_data); 412 if (err < 0) 413 goto del_unicast; 414 } 415 416 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 417 dev_uc_del(master, dev->dev_addr); 418 419 if (dsa_switch_supports_uc_filtering(ds)) 420 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 421 422 out_change_dev_addr: 423 eth_hw_addr_set(dev, addr->sa_data); 424 425 return 0; 426 427 del_unicast: 428 if (dsa_switch_supports_uc_filtering(ds)) 429 dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0); 430 431 return err; 432 } 433 434 struct dsa_slave_dump_ctx { 435 struct net_device *dev; 436 struct sk_buff *skb; 437 struct netlink_callback *cb; 438 int idx; 439 }; 440 441 static int 442 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 443 bool is_static, void *data) 444 { 445 struct dsa_slave_dump_ctx *dump = data; 446 u32 portid = NETLINK_CB(dump->cb->skb).portid; 447 u32 seq = dump->cb->nlh->nlmsg_seq; 448 struct nlmsghdr *nlh; 449 struct ndmsg *ndm; 450 451 if (dump->idx < dump->cb->args[2]) 452 goto skip; 453 454 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 455 sizeof(*ndm), NLM_F_MULTI); 456 if (!nlh) 457 return -EMSGSIZE; 458 459 ndm = nlmsg_data(nlh); 460 ndm->ndm_family = AF_BRIDGE; 461 ndm->ndm_pad1 = 0; 462 ndm->ndm_pad2 = 0; 463 ndm->ndm_flags = NTF_SELF; 464 ndm->ndm_type = 0; 465 ndm->ndm_ifindex = dump->dev->ifindex; 466 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 467 468 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 469 goto nla_put_failure; 470 471 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 472 goto nla_put_failure; 473 474 nlmsg_end(dump->skb, nlh); 475 476 skip: 477 dump->idx++; 478 return 0; 479 480 nla_put_failure: 481 nlmsg_cancel(dump->skb, nlh); 482 return -EMSGSIZE; 483 } 484 485 static int 486 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 487 struct net_device *dev, struct net_device *filter_dev, 488 int *idx) 489 { 490 struct dsa_port *dp = dsa_slave_to_port(dev); 491 struct dsa_slave_dump_ctx dump = { 492 .dev = dev, 493 .skb = skb, 494 .cb = cb, 495 .idx = *idx, 496 }; 497 int err; 498 499 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 500 *idx = dump.idx; 501 502 return err; 503 } 504 505 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 506 { 507 struct dsa_slave_priv *p = netdev_priv(dev); 508 struct dsa_switch *ds = p->dp->ds; 509 int port = p->dp->index; 510 511 /* Pass through to switch driver if it supports timestamping */ 512 switch (cmd) { 513 case SIOCGHWTSTAMP: 514 if (ds->ops->port_hwtstamp_get) 515 return ds->ops->port_hwtstamp_get(ds, port, ifr); 516 break; 517 case SIOCSHWTSTAMP: 518 if (ds->ops->port_hwtstamp_set) 519 return ds->ops->port_hwtstamp_set(ds, port, ifr); 520 break; 521 } 522 523 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 524 } 525 526 static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx, 527 const struct switchdev_attr *attr, 528 struct netlink_ext_ack *extack) 529 { 530 struct dsa_port *dp = dsa_slave_to_port(dev); 531 int ret; 532 533 if (ctx && ctx != dp) 534 return 0; 535 536 switch (attr->id) { 537 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 538 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 539 return -EOPNOTSUPP; 540 541 ret = dsa_port_set_state(dp, attr->u.stp_state, true); 542 break; 543 case SWITCHDEV_ATTR_ID_PORT_MST_STATE: 544 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 545 return -EOPNOTSUPP; 546 547 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack); 548 break; 549 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 550 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 551 return -EOPNOTSUPP; 552 553 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 554 extack); 555 break; 556 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 557 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 558 return -EOPNOTSUPP; 559 560 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 561 break; 562 case SWITCHDEV_ATTR_ID_BRIDGE_MST: 563 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 564 return -EOPNOTSUPP; 565 566 ret = dsa_port_mst_enable(dp, attr->u.mst, extack); 567 break; 568 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 569 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 570 return -EOPNOTSUPP; 571 572 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 573 extack); 574 break; 575 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 576 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 577 return -EOPNOTSUPP; 578 579 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 580 break; 581 case SWITCHDEV_ATTR_ID_VLAN_MSTI: 582 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 583 return -EOPNOTSUPP; 584 585 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti); 586 break; 587 default: 588 ret = -EOPNOTSUPP; 589 break; 590 } 591 592 return ret; 593 } 594 595 /* Must be called under rcu_read_lock() */ 596 static int 597 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave, 598 const struct switchdev_obj_port_vlan *vlan) 599 { 600 struct net_device *upper_dev; 601 struct list_head *iter; 602 603 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 604 u16 vid; 605 606 if (!is_vlan_dev(upper_dev)) 607 continue; 608 609 vid = vlan_dev_vlan_id(upper_dev); 610 if (vid == vlan->vid) 611 return -EBUSY; 612 } 613 614 return 0; 615 } 616 617 static int dsa_slave_vlan_add(struct net_device *dev, 618 const struct switchdev_obj *obj, 619 struct netlink_ext_ack *extack) 620 { 621 struct dsa_port *dp = dsa_slave_to_port(dev); 622 struct switchdev_obj_port_vlan *vlan; 623 int err; 624 625 if (dsa_port_skip_vlan_configuration(dp)) { 626 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 627 return 0; 628 } 629 630 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 631 632 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 633 * the same VID. 634 */ 635 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { 636 rcu_read_lock(); 637 err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan); 638 rcu_read_unlock(); 639 if (err) { 640 NL_SET_ERR_MSG_MOD(extack, 641 "Port already has a VLAN upper with this VID"); 642 return err; 643 } 644 } 645 646 return dsa_port_vlan_add(dp, vlan, extack); 647 } 648 649 /* Offload a VLAN installed on the bridge or on a foreign interface by 650 * installing it as a VLAN towards the CPU port. 651 */ 652 static int dsa_slave_host_vlan_add(struct net_device *dev, 653 const struct switchdev_obj *obj, 654 struct netlink_ext_ack *extack) 655 { 656 struct dsa_port *dp = dsa_slave_to_port(dev); 657 struct switchdev_obj_port_vlan vlan; 658 659 /* Do nothing if this is a software bridge */ 660 if (!dp->bridge) 661 return -EOPNOTSUPP; 662 663 if (dsa_port_skip_vlan_configuration(dp)) { 664 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 665 return 0; 666 } 667 668 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 669 670 /* Even though drivers often handle CPU membership in special ways, 671 * it doesn't make sense to program a PVID, so clear this flag. 672 */ 673 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 674 675 return dsa_port_host_vlan_add(dp, &vlan, extack); 676 } 677 678 static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, 679 const struct switchdev_obj *obj, 680 struct netlink_ext_ack *extack) 681 { 682 struct dsa_port *dp = dsa_slave_to_port(dev); 683 int err; 684 685 if (ctx && ctx != dp) 686 return 0; 687 688 switch (obj->id) { 689 case SWITCHDEV_OBJ_ID_PORT_MDB: 690 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 691 return -EOPNOTSUPP; 692 693 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 694 break; 695 case SWITCHDEV_OBJ_ID_HOST_MDB: 696 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 697 return -EOPNOTSUPP; 698 699 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 700 break; 701 case SWITCHDEV_OBJ_ID_PORT_VLAN: 702 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 703 err = dsa_slave_vlan_add(dev, obj, extack); 704 else 705 err = dsa_slave_host_vlan_add(dev, obj, extack); 706 break; 707 case SWITCHDEV_OBJ_ID_MRP: 708 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 709 return -EOPNOTSUPP; 710 711 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 712 break; 713 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 714 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 715 return -EOPNOTSUPP; 716 717 err = dsa_port_mrp_add_ring_role(dp, 718 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 719 break; 720 default: 721 err = -EOPNOTSUPP; 722 break; 723 } 724 725 return err; 726 } 727 728 static int dsa_slave_vlan_del(struct net_device *dev, 729 const struct switchdev_obj *obj) 730 { 731 struct dsa_port *dp = dsa_slave_to_port(dev); 732 struct switchdev_obj_port_vlan *vlan; 733 734 if (dsa_port_skip_vlan_configuration(dp)) 735 return 0; 736 737 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 738 739 return dsa_port_vlan_del(dp, vlan); 740 } 741 742 static int dsa_slave_host_vlan_del(struct net_device *dev, 743 const struct switchdev_obj *obj) 744 { 745 struct dsa_port *dp = dsa_slave_to_port(dev); 746 struct switchdev_obj_port_vlan *vlan; 747 748 /* Do nothing if this is a software bridge */ 749 if (!dp->bridge) 750 return -EOPNOTSUPP; 751 752 if (dsa_port_skip_vlan_configuration(dp)) 753 return 0; 754 755 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 756 757 return dsa_port_host_vlan_del(dp, vlan); 758 } 759 760 static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx, 761 const struct switchdev_obj *obj) 762 { 763 struct dsa_port *dp = dsa_slave_to_port(dev); 764 int err; 765 766 if (ctx && ctx != dp) 767 return 0; 768 769 switch (obj->id) { 770 case SWITCHDEV_OBJ_ID_PORT_MDB: 771 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 772 return -EOPNOTSUPP; 773 774 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 775 break; 776 case SWITCHDEV_OBJ_ID_HOST_MDB: 777 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 778 return -EOPNOTSUPP; 779 780 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 781 break; 782 case SWITCHDEV_OBJ_ID_PORT_VLAN: 783 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 784 err = dsa_slave_vlan_del(dev, obj); 785 else 786 err = dsa_slave_host_vlan_del(dev, obj); 787 break; 788 case SWITCHDEV_OBJ_ID_MRP: 789 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 790 return -EOPNOTSUPP; 791 792 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 793 break; 794 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 795 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 796 return -EOPNOTSUPP; 797 798 err = dsa_port_mrp_del_ring_role(dp, 799 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 800 break; 801 default: 802 err = -EOPNOTSUPP; 803 break; 804 } 805 806 return err; 807 } 808 809 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 810 struct sk_buff *skb) 811 { 812 #ifdef CONFIG_NET_POLL_CONTROLLER 813 struct dsa_slave_priv *p = netdev_priv(dev); 814 815 return netpoll_send_skb(p->netpoll, skb); 816 #else 817 BUG(); 818 return NETDEV_TX_OK; 819 #endif 820 } 821 822 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 823 struct sk_buff *skb) 824 { 825 struct dsa_switch *ds = p->dp->ds; 826 827 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 828 return; 829 830 if (!ds->ops->port_txtstamp) 831 return; 832 833 ds->ops->port_txtstamp(ds, p->dp->index, skb); 834 } 835 836 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 837 { 838 /* SKB for netpoll still need to be mangled with the protocol-specific 839 * tag to be successfully transmitted 840 */ 841 if (unlikely(netpoll_tx_running(dev))) 842 return dsa_slave_netpoll_send_skb(dev, skb); 843 844 /* Queue the SKB for transmission on the parent interface, but 845 * do not modify its EtherType 846 */ 847 skb->dev = dsa_slave_to_master(dev); 848 dev_queue_xmit(skb); 849 850 return NETDEV_TX_OK; 851 } 852 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 853 854 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) 855 { 856 int needed_headroom = dev->needed_headroom; 857 int needed_tailroom = dev->needed_tailroom; 858 859 /* For tail taggers, we need to pad short frames ourselves, to ensure 860 * that the tail tag does not fail at its role of being at the end of 861 * the packet, once the master interface pads the frame. Account for 862 * that pad length here, and pad later. 863 */ 864 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) 865 needed_tailroom += ETH_ZLEN - skb->len; 866 /* skb_headroom() returns unsigned int... */ 867 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); 868 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); 869 870 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) 871 /* No reallocation needed, yay! */ 872 return 0; 873 874 return pskb_expand_head(skb, needed_headroom, needed_tailroom, 875 GFP_ATOMIC); 876 } 877 878 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 879 { 880 struct dsa_slave_priv *p = netdev_priv(dev); 881 struct sk_buff *nskb; 882 883 dev_sw_netstats_tx_add(dev, 1, skb->len); 884 885 memset(skb->cb, 0, sizeof(skb->cb)); 886 887 /* Handle tx timestamp if any */ 888 dsa_skb_tx_timestamp(p, skb); 889 890 if (dsa_realloc_skb(skb, dev)) { 891 dev_kfree_skb_any(skb); 892 return NETDEV_TX_OK; 893 } 894 895 /* needed_tailroom should still be 'warm' in the cache line from 896 * dsa_realloc_skb(), which has also ensured that padding is safe. 897 */ 898 if (dev->needed_tailroom) 899 eth_skb_pad(skb); 900 901 /* Transmit function may have to reallocate the original SKB, 902 * in which case it must have freed it. Only free it here on error. 903 */ 904 nskb = p->xmit(skb, dev); 905 if (!nskb) { 906 kfree_skb(skb); 907 return NETDEV_TX_OK; 908 } 909 910 return dsa_enqueue_skb(nskb, dev); 911 } 912 913 /* ethtool operations *******************************************************/ 914 915 static void dsa_slave_get_drvinfo(struct net_device *dev, 916 struct ethtool_drvinfo *drvinfo) 917 { 918 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 919 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 920 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 921 } 922 923 static int dsa_slave_get_regs_len(struct net_device *dev) 924 { 925 struct dsa_port *dp = dsa_slave_to_port(dev); 926 struct dsa_switch *ds = dp->ds; 927 928 if (ds->ops->get_regs_len) 929 return ds->ops->get_regs_len(ds, dp->index); 930 931 return -EOPNOTSUPP; 932 } 933 934 static void 935 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 936 { 937 struct dsa_port *dp = dsa_slave_to_port(dev); 938 struct dsa_switch *ds = dp->ds; 939 940 if (ds->ops->get_regs) 941 ds->ops->get_regs(ds, dp->index, regs, _p); 942 } 943 944 static int dsa_slave_nway_reset(struct net_device *dev) 945 { 946 struct dsa_port *dp = dsa_slave_to_port(dev); 947 948 return phylink_ethtool_nway_reset(dp->pl); 949 } 950 951 static int dsa_slave_get_eeprom_len(struct net_device *dev) 952 { 953 struct dsa_port *dp = dsa_slave_to_port(dev); 954 struct dsa_switch *ds = dp->ds; 955 956 if (ds->cd && ds->cd->eeprom_len) 957 return ds->cd->eeprom_len; 958 959 if (ds->ops->get_eeprom_len) 960 return ds->ops->get_eeprom_len(ds); 961 962 return 0; 963 } 964 965 static int dsa_slave_get_eeprom(struct net_device *dev, 966 struct ethtool_eeprom *eeprom, u8 *data) 967 { 968 struct dsa_port *dp = dsa_slave_to_port(dev); 969 struct dsa_switch *ds = dp->ds; 970 971 if (ds->ops->get_eeprom) 972 return ds->ops->get_eeprom(ds, eeprom, data); 973 974 return -EOPNOTSUPP; 975 } 976 977 static int dsa_slave_set_eeprom(struct net_device *dev, 978 struct ethtool_eeprom *eeprom, u8 *data) 979 { 980 struct dsa_port *dp = dsa_slave_to_port(dev); 981 struct dsa_switch *ds = dp->ds; 982 983 if (ds->ops->set_eeprom) 984 return ds->ops->set_eeprom(ds, eeprom, data); 985 986 return -EOPNOTSUPP; 987 } 988 989 static void dsa_slave_get_strings(struct net_device *dev, 990 uint32_t stringset, uint8_t *data) 991 { 992 struct dsa_port *dp = dsa_slave_to_port(dev); 993 struct dsa_switch *ds = dp->ds; 994 995 if (stringset == ETH_SS_STATS) { 996 int len = ETH_GSTRING_LEN; 997 998 strncpy(data, "tx_packets", len); 999 strncpy(data + len, "tx_bytes", len); 1000 strncpy(data + 2 * len, "rx_packets", len); 1001 strncpy(data + 3 * len, "rx_bytes", len); 1002 if (ds->ops->get_strings) 1003 ds->ops->get_strings(ds, dp->index, stringset, 1004 data + 4 * len); 1005 } else if (stringset == ETH_SS_TEST) { 1006 net_selftest_get_strings(data); 1007 } 1008 1009 } 1010 1011 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 1012 struct ethtool_stats *stats, 1013 uint64_t *data) 1014 { 1015 struct dsa_port *dp = dsa_slave_to_port(dev); 1016 struct dsa_switch *ds = dp->ds; 1017 struct pcpu_sw_netstats *s; 1018 unsigned int start; 1019 int i; 1020 1021 for_each_possible_cpu(i) { 1022 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 1023 1024 s = per_cpu_ptr(dev->tstats, i); 1025 do { 1026 start = u64_stats_fetch_begin(&s->syncp); 1027 tx_packets = u64_stats_read(&s->tx_packets); 1028 tx_bytes = u64_stats_read(&s->tx_bytes); 1029 rx_packets = u64_stats_read(&s->rx_packets); 1030 rx_bytes = u64_stats_read(&s->rx_bytes); 1031 } while (u64_stats_fetch_retry(&s->syncp, start)); 1032 data[0] += tx_packets; 1033 data[1] += tx_bytes; 1034 data[2] += rx_packets; 1035 data[3] += rx_bytes; 1036 } 1037 if (ds->ops->get_ethtool_stats) 1038 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 1039 } 1040 1041 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 1042 { 1043 struct dsa_port *dp = dsa_slave_to_port(dev); 1044 struct dsa_switch *ds = dp->ds; 1045 1046 if (sset == ETH_SS_STATS) { 1047 int count = 0; 1048 1049 if (ds->ops->get_sset_count) { 1050 count = ds->ops->get_sset_count(ds, dp->index, sset); 1051 if (count < 0) 1052 return count; 1053 } 1054 1055 return count + 4; 1056 } else if (sset == ETH_SS_TEST) { 1057 return net_selftest_get_count(); 1058 } 1059 1060 return -EOPNOTSUPP; 1061 } 1062 1063 static void dsa_slave_get_eth_phy_stats(struct net_device *dev, 1064 struct ethtool_eth_phy_stats *phy_stats) 1065 { 1066 struct dsa_port *dp = dsa_slave_to_port(dev); 1067 struct dsa_switch *ds = dp->ds; 1068 1069 if (ds->ops->get_eth_phy_stats) 1070 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats); 1071 } 1072 1073 static void dsa_slave_get_eth_mac_stats(struct net_device *dev, 1074 struct ethtool_eth_mac_stats *mac_stats) 1075 { 1076 struct dsa_port *dp = dsa_slave_to_port(dev); 1077 struct dsa_switch *ds = dp->ds; 1078 1079 if (ds->ops->get_eth_mac_stats) 1080 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats); 1081 } 1082 1083 static void 1084 dsa_slave_get_eth_ctrl_stats(struct net_device *dev, 1085 struct ethtool_eth_ctrl_stats *ctrl_stats) 1086 { 1087 struct dsa_port *dp = dsa_slave_to_port(dev); 1088 struct dsa_switch *ds = dp->ds; 1089 1090 if (ds->ops->get_eth_ctrl_stats) 1091 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats); 1092 } 1093 1094 static void 1095 dsa_slave_get_rmon_stats(struct net_device *dev, 1096 struct ethtool_rmon_stats *rmon_stats, 1097 const struct ethtool_rmon_hist_range **ranges) 1098 { 1099 struct dsa_port *dp = dsa_slave_to_port(dev); 1100 struct dsa_switch *ds = dp->ds; 1101 1102 if (ds->ops->get_rmon_stats) 1103 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges); 1104 } 1105 1106 static void dsa_slave_net_selftest(struct net_device *ndev, 1107 struct ethtool_test *etest, u64 *buf) 1108 { 1109 struct dsa_port *dp = dsa_slave_to_port(ndev); 1110 struct dsa_switch *ds = dp->ds; 1111 1112 if (ds->ops->self_test) { 1113 ds->ops->self_test(ds, dp->index, etest, buf); 1114 return; 1115 } 1116 1117 net_selftest(ndev, etest, buf); 1118 } 1119 1120 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1121 { 1122 struct dsa_port *dp = dsa_slave_to_port(dev); 1123 struct dsa_switch *ds = dp->ds; 1124 1125 phylink_ethtool_get_wol(dp->pl, w); 1126 1127 if (ds->ops->get_wol) 1128 ds->ops->get_wol(ds, dp->index, w); 1129 } 1130 1131 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1132 { 1133 struct dsa_port *dp = dsa_slave_to_port(dev); 1134 struct dsa_switch *ds = dp->ds; 1135 int ret = -EOPNOTSUPP; 1136 1137 phylink_ethtool_set_wol(dp->pl, w); 1138 1139 if (ds->ops->set_wol) 1140 ret = ds->ops->set_wol(ds, dp->index, w); 1141 1142 return ret; 1143 } 1144 1145 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 1146 { 1147 struct dsa_port *dp = dsa_slave_to_port(dev); 1148 struct dsa_switch *ds = dp->ds; 1149 int ret; 1150 1151 /* Port's PHY and MAC both need to be EEE capable */ 1152 if (!dev->phydev || !dp->pl) 1153 return -ENODEV; 1154 1155 if (!ds->ops->set_mac_eee) 1156 return -EOPNOTSUPP; 1157 1158 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1159 if (ret) 1160 return ret; 1161 1162 return phylink_ethtool_set_eee(dp->pl, e); 1163 } 1164 1165 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 1166 { 1167 struct dsa_port *dp = dsa_slave_to_port(dev); 1168 struct dsa_switch *ds = dp->ds; 1169 int ret; 1170 1171 /* Port's PHY and MAC both need to be EEE capable */ 1172 if (!dev->phydev || !dp->pl) 1173 return -ENODEV; 1174 1175 if (!ds->ops->get_mac_eee) 1176 return -EOPNOTSUPP; 1177 1178 ret = ds->ops->get_mac_eee(ds, dp->index, e); 1179 if (ret) 1180 return ret; 1181 1182 return phylink_ethtool_get_eee(dp->pl, e); 1183 } 1184 1185 static int dsa_slave_get_link_ksettings(struct net_device *dev, 1186 struct ethtool_link_ksettings *cmd) 1187 { 1188 struct dsa_port *dp = dsa_slave_to_port(dev); 1189 1190 return phylink_ethtool_ksettings_get(dp->pl, cmd); 1191 } 1192 1193 static int dsa_slave_set_link_ksettings(struct net_device *dev, 1194 const struct ethtool_link_ksettings *cmd) 1195 { 1196 struct dsa_port *dp = dsa_slave_to_port(dev); 1197 1198 return phylink_ethtool_ksettings_set(dp->pl, cmd); 1199 } 1200 1201 static void dsa_slave_get_pause_stats(struct net_device *dev, 1202 struct ethtool_pause_stats *pause_stats) 1203 { 1204 struct dsa_port *dp = dsa_slave_to_port(dev); 1205 struct dsa_switch *ds = dp->ds; 1206 1207 if (ds->ops->get_pause_stats) 1208 ds->ops->get_pause_stats(ds, dp->index, pause_stats); 1209 } 1210 1211 static void dsa_slave_get_pauseparam(struct net_device *dev, 1212 struct ethtool_pauseparam *pause) 1213 { 1214 struct dsa_port *dp = dsa_slave_to_port(dev); 1215 1216 phylink_ethtool_get_pauseparam(dp->pl, pause); 1217 } 1218 1219 static int dsa_slave_set_pauseparam(struct net_device *dev, 1220 struct ethtool_pauseparam *pause) 1221 { 1222 struct dsa_port *dp = dsa_slave_to_port(dev); 1223 1224 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1225 } 1226 1227 #ifdef CONFIG_NET_POLL_CONTROLLER 1228 static int dsa_slave_netpoll_setup(struct net_device *dev, 1229 struct netpoll_info *ni) 1230 { 1231 struct net_device *master = dsa_slave_to_master(dev); 1232 struct dsa_slave_priv *p = netdev_priv(dev); 1233 struct netpoll *netpoll; 1234 int err = 0; 1235 1236 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1237 if (!netpoll) 1238 return -ENOMEM; 1239 1240 err = __netpoll_setup(netpoll, master); 1241 if (err) { 1242 kfree(netpoll); 1243 goto out; 1244 } 1245 1246 p->netpoll = netpoll; 1247 out: 1248 return err; 1249 } 1250 1251 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 1252 { 1253 struct dsa_slave_priv *p = netdev_priv(dev); 1254 struct netpoll *netpoll = p->netpoll; 1255 1256 if (!netpoll) 1257 return; 1258 1259 p->netpoll = NULL; 1260 1261 __netpoll_free(netpoll); 1262 } 1263 1264 static void dsa_slave_poll_controller(struct net_device *dev) 1265 { 1266 } 1267 #endif 1268 1269 static struct dsa_mall_tc_entry * 1270 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1271 { 1272 struct dsa_slave_priv *p = netdev_priv(dev); 1273 struct dsa_mall_tc_entry *mall_tc_entry; 1274 1275 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1276 if (mall_tc_entry->cookie == cookie) 1277 return mall_tc_entry; 1278 1279 return NULL; 1280 } 1281 1282 static int 1283 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 1284 struct tc_cls_matchall_offload *cls, 1285 bool ingress) 1286 { 1287 struct netlink_ext_ack *extack = cls->common.extack; 1288 struct dsa_port *dp = dsa_slave_to_port(dev); 1289 struct dsa_slave_priv *p = netdev_priv(dev); 1290 struct dsa_mall_mirror_tc_entry *mirror; 1291 struct dsa_mall_tc_entry *mall_tc_entry; 1292 struct dsa_switch *ds = dp->ds; 1293 struct flow_action_entry *act; 1294 struct dsa_port *to_dp; 1295 int err; 1296 1297 if (!ds->ops->port_mirror_add) 1298 return -EOPNOTSUPP; 1299 1300 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1301 cls->common.extack)) 1302 return -EOPNOTSUPP; 1303 1304 act = &cls->rule->action.entries[0]; 1305 1306 if (!act->dev) 1307 return -EINVAL; 1308 1309 if (!dsa_slave_dev_check(act->dev)) 1310 return -EOPNOTSUPP; 1311 1312 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1313 if (!mall_tc_entry) 1314 return -ENOMEM; 1315 1316 mall_tc_entry->cookie = cls->cookie; 1317 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1318 mirror = &mall_tc_entry->mirror; 1319 1320 to_dp = dsa_slave_to_port(act->dev); 1321 1322 mirror->to_local_port = to_dp->index; 1323 mirror->ingress = ingress; 1324 1325 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1326 if (err) { 1327 kfree(mall_tc_entry); 1328 return err; 1329 } 1330 1331 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1332 1333 return err; 1334 } 1335 1336 static int 1337 dsa_slave_add_cls_matchall_police(struct net_device *dev, 1338 struct tc_cls_matchall_offload *cls, 1339 bool ingress) 1340 { 1341 struct netlink_ext_ack *extack = cls->common.extack; 1342 struct dsa_port *dp = dsa_slave_to_port(dev); 1343 struct dsa_slave_priv *p = netdev_priv(dev); 1344 struct dsa_mall_policer_tc_entry *policer; 1345 struct dsa_mall_tc_entry *mall_tc_entry; 1346 struct dsa_switch *ds = dp->ds; 1347 struct flow_action_entry *act; 1348 int err; 1349 1350 if (!ds->ops->port_policer_add) { 1351 NL_SET_ERR_MSG_MOD(extack, 1352 "Policing offload not implemented"); 1353 return -EOPNOTSUPP; 1354 } 1355 1356 if (!ingress) { 1357 NL_SET_ERR_MSG_MOD(extack, 1358 "Only supported on ingress qdisc"); 1359 return -EOPNOTSUPP; 1360 } 1361 1362 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1363 cls->common.extack)) 1364 return -EOPNOTSUPP; 1365 1366 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1367 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1368 NL_SET_ERR_MSG_MOD(extack, 1369 "Only one port policer allowed"); 1370 return -EEXIST; 1371 } 1372 } 1373 1374 act = &cls->rule->action.entries[0]; 1375 1376 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1377 if (!mall_tc_entry) 1378 return -ENOMEM; 1379 1380 mall_tc_entry->cookie = cls->cookie; 1381 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1382 policer = &mall_tc_entry->policer; 1383 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1384 policer->burst = act->police.burst; 1385 1386 err = ds->ops->port_policer_add(ds, dp->index, policer); 1387 if (err) { 1388 kfree(mall_tc_entry); 1389 return err; 1390 } 1391 1392 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1393 1394 return err; 1395 } 1396 1397 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1398 struct tc_cls_matchall_offload *cls, 1399 bool ingress) 1400 { 1401 int err = -EOPNOTSUPP; 1402 1403 if (cls->common.protocol == htons(ETH_P_ALL) && 1404 flow_offload_has_one_action(&cls->rule->action) && 1405 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1406 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1407 else if (flow_offload_has_one_action(&cls->rule->action) && 1408 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1409 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1410 1411 return err; 1412 } 1413 1414 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1415 struct tc_cls_matchall_offload *cls) 1416 { 1417 struct dsa_port *dp = dsa_slave_to_port(dev); 1418 struct dsa_mall_tc_entry *mall_tc_entry; 1419 struct dsa_switch *ds = dp->ds; 1420 1421 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1422 if (!mall_tc_entry) 1423 return; 1424 1425 list_del(&mall_tc_entry->list); 1426 1427 switch (mall_tc_entry->type) { 1428 case DSA_PORT_MALL_MIRROR: 1429 if (ds->ops->port_mirror_del) 1430 ds->ops->port_mirror_del(ds, dp->index, 1431 &mall_tc_entry->mirror); 1432 break; 1433 case DSA_PORT_MALL_POLICER: 1434 if (ds->ops->port_policer_del) 1435 ds->ops->port_policer_del(ds, dp->index); 1436 break; 1437 default: 1438 WARN_ON(1); 1439 } 1440 1441 kfree(mall_tc_entry); 1442 } 1443 1444 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1445 struct tc_cls_matchall_offload *cls, 1446 bool ingress) 1447 { 1448 if (cls->common.chain_index) 1449 return -EOPNOTSUPP; 1450 1451 switch (cls->command) { 1452 case TC_CLSMATCHALL_REPLACE: 1453 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1454 case TC_CLSMATCHALL_DESTROY: 1455 dsa_slave_del_cls_matchall(dev, cls); 1456 return 0; 1457 default: 1458 return -EOPNOTSUPP; 1459 } 1460 } 1461 1462 static int dsa_slave_add_cls_flower(struct net_device *dev, 1463 struct flow_cls_offload *cls, 1464 bool ingress) 1465 { 1466 struct dsa_port *dp = dsa_slave_to_port(dev); 1467 struct dsa_switch *ds = dp->ds; 1468 int port = dp->index; 1469 1470 if (!ds->ops->cls_flower_add) 1471 return -EOPNOTSUPP; 1472 1473 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1474 } 1475 1476 static int dsa_slave_del_cls_flower(struct net_device *dev, 1477 struct flow_cls_offload *cls, 1478 bool ingress) 1479 { 1480 struct dsa_port *dp = dsa_slave_to_port(dev); 1481 struct dsa_switch *ds = dp->ds; 1482 int port = dp->index; 1483 1484 if (!ds->ops->cls_flower_del) 1485 return -EOPNOTSUPP; 1486 1487 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1488 } 1489 1490 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1491 struct flow_cls_offload *cls, 1492 bool ingress) 1493 { 1494 struct dsa_port *dp = dsa_slave_to_port(dev); 1495 struct dsa_switch *ds = dp->ds; 1496 int port = dp->index; 1497 1498 if (!ds->ops->cls_flower_stats) 1499 return -EOPNOTSUPP; 1500 1501 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1502 } 1503 1504 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1505 struct flow_cls_offload *cls, 1506 bool ingress) 1507 { 1508 switch (cls->command) { 1509 case FLOW_CLS_REPLACE: 1510 return dsa_slave_add_cls_flower(dev, cls, ingress); 1511 case FLOW_CLS_DESTROY: 1512 return dsa_slave_del_cls_flower(dev, cls, ingress); 1513 case FLOW_CLS_STATS: 1514 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1515 default: 1516 return -EOPNOTSUPP; 1517 } 1518 } 1519 1520 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1521 void *cb_priv, bool ingress) 1522 { 1523 struct net_device *dev = cb_priv; 1524 1525 if (!tc_can_offload(dev)) 1526 return -EOPNOTSUPP; 1527 1528 switch (type) { 1529 case TC_SETUP_CLSMATCHALL: 1530 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1531 case TC_SETUP_CLSFLOWER: 1532 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1533 default: 1534 return -EOPNOTSUPP; 1535 } 1536 } 1537 1538 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1539 void *type_data, void *cb_priv) 1540 { 1541 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1542 } 1543 1544 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1545 void *type_data, void *cb_priv) 1546 { 1547 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1548 } 1549 1550 static LIST_HEAD(dsa_slave_block_cb_list); 1551 1552 static int dsa_slave_setup_tc_block(struct net_device *dev, 1553 struct flow_block_offload *f) 1554 { 1555 struct flow_block_cb *block_cb; 1556 flow_setup_cb_t *cb; 1557 1558 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1559 cb = dsa_slave_setup_tc_block_cb_ig; 1560 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1561 cb = dsa_slave_setup_tc_block_cb_eg; 1562 else 1563 return -EOPNOTSUPP; 1564 1565 f->driver_block_list = &dsa_slave_block_cb_list; 1566 1567 switch (f->command) { 1568 case FLOW_BLOCK_BIND: 1569 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1570 return -EBUSY; 1571 1572 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1573 if (IS_ERR(block_cb)) 1574 return PTR_ERR(block_cb); 1575 1576 flow_block_cb_add(block_cb, f); 1577 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1578 return 0; 1579 case FLOW_BLOCK_UNBIND: 1580 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1581 if (!block_cb) 1582 return -ENOENT; 1583 1584 flow_block_cb_remove(block_cb, f); 1585 list_del(&block_cb->driver_list); 1586 return 0; 1587 default: 1588 return -EOPNOTSUPP; 1589 } 1590 } 1591 1592 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port, 1593 void *type_data) 1594 { 1595 struct net_device *master = dsa_port_to_master(dsa_to_port(ds, port)); 1596 1597 if (!master->netdev_ops->ndo_setup_tc) 1598 return -EOPNOTSUPP; 1599 1600 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data); 1601 } 1602 1603 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1604 void *type_data) 1605 { 1606 struct dsa_port *dp = dsa_slave_to_port(dev); 1607 struct dsa_switch *ds = dp->ds; 1608 1609 switch (type) { 1610 case TC_SETUP_BLOCK: 1611 return dsa_slave_setup_tc_block(dev, type_data); 1612 case TC_SETUP_FT: 1613 return dsa_slave_setup_ft_block(ds, dp->index, type_data); 1614 default: 1615 break; 1616 } 1617 1618 if (!ds->ops->port_setup_tc) 1619 return -EOPNOTSUPP; 1620 1621 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1622 } 1623 1624 static int dsa_slave_get_rxnfc(struct net_device *dev, 1625 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1626 { 1627 struct dsa_port *dp = dsa_slave_to_port(dev); 1628 struct dsa_switch *ds = dp->ds; 1629 1630 if (!ds->ops->get_rxnfc) 1631 return -EOPNOTSUPP; 1632 1633 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1634 } 1635 1636 static int dsa_slave_set_rxnfc(struct net_device *dev, 1637 struct ethtool_rxnfc *nfc) 1638 { 1639 struct dsa_port *dp = dsa_slave_to_port(dev); 1640 struct dsa_switch *ds = dp->ds; 1641 1642 if (!ds->ops->set_rxnfc) 1643 return -EOPNOTSUPP; 1644 1645 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1646 } 1647 1648 static int dsa_slave_get_ts_info(struct net_device *dev, 1649 struct ethtool_ts_info *ts) 1650 { 1651 struct dsa_slave_priv *p = netdev_priv(dev); 1652 struct dsa_switch *ds = p->dp->ds; 1653 1654 if (!ds->ops->get_ts_info) 1655 return -EOPNOTSUPP; 1656 1657 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1658 } 1659 1660 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1661 u16 vid) 1662 { 1663 struct dsa_port *dp = dsa_slave_to_port(dev); 1664 struct switchdev_obj_port_vlan vlan = { 1665 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1666 .vid = vid, 1667 /* This API only allows programming tagged, non-PVID VIDs */ 1668 .flags = 0, 1669 }; 1670 struct netlink_ext_ack extack = {0}; 1671 int ret; 1672 1673 /* User port... */ 1674 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1675 if (ret) { 1676 if (extack._msg) 1677 netdev_err(dev, "%s\n", extack._msg); 1678 return ret; 1679 } 1680 1681 /* And CPU port... */ 1682 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1683 if (ret) { 1684 if (extack._msg) 1685 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1686 extack._msg); 1687 return ret; 1688 } 1689 1690 return 0; 1691 } 1692 1693 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1694 u16 vid) 1695 { 1696 struct dsa_port *dp = dsa_slave_to_port(dev); 1697 struct switchdev_obj_port_vlan vlan = { 1698 .vid = vid, 1699 /* This API only allows programming tagged, non-PVID VIDs */ 1700 .flags = 0, 1701 }; 1702 int err; 1703 1704 err = dsa_port_vlan_del(dp, &vlan); 1705 if (err) 1706 return err; 1707 1708 return dsa_port_host_vlan_del(dp, &vlan); 1709 } 1710 1711 static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg) 1712 { 1713 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1714 1715 return dsa_slave_vlan_rx_add_vid(arg, proto, vid); 1716 } 1717 1718 static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg) 1719 { 1720 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1721 1722 return dsa_slave_vlan_rx_kill_vid(arg, proto, vid); 1723 } 1724 1725 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1726 * filtering is enabled. The baseline is that only ports that offload a 1727 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1728 * but there are exceptions for quirky hardware. 1729 * 1730 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1731 * the same switch with other ports that offload a VLAN-aware bridge are also 1732 * inevitably VLAN-aware. 1733 * 1734 * To summarize, a DSA switch port offloads: 1735 * 1736 * - If standalone (this includes software bridge, software LAG): 1737 * - if ds->needs_standalone_vlan_filtering = true, OR if 1738 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1739 * this switch chip which have vlan_filtering=1) 1740 * - the 8021q upper VLANs 1741 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1742 * global, or it is, but no port is under a VLAN-aware bridge): 1743 * - no VLAN (any 8021q upper is a software VLAN) 1744 * 1745 * - If under a vlan_filtering=0 bridge which it offload: 1746 * - if ds->configure_vlan_while_not_filtering = true (default): 1747 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1748 * - else (deprecated): 1749 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1750 * enabled, so this behavior is broken and discouraged. 1751 * 1752 * - If under a vlan_filtering=1 bridge which it offload: 1753 * - the bridge VLANs 1754 * - the 8021q upper VLANs 1755 */ 1756 int dsa_slave_manage_vlan_filtering(struct net_device *slave, 1757 bool vlan_filtering) 1758 { 1759 int err; 1760 1761 if (vlan_filtering) { 1762 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1763 1764 err = vlan_for_each(slave, dsa_slave_restore_vlan, slave); 1765 if (err) { 1766 vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1767 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1768 return err; 1769 } 1770 } else { 1771 err = vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1772 if (err) 1773 return err; 1774 1775 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1776 } 1777 1778 return 0; 1779 } 1780 1781 struct dsa_hw_port { 1782 struct list_head list; 1783 struct net_device *dev; 1784 int old_mtu; 1785 }; 1786 1787 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1788 { 1789 const struct dsa_hw_port *p; 1790 int err; 1791 1792 list_for_each_entry(p, hw_port_list, list) { 1793 if (p->dev->mtu == mtu) 1794 continue; 1795 1796 err = dev_set_mtu(p->dev, mtu); 1797 if (err) 1798 goto rollback; 1799 } 1800 1801 return 0; 1802 1803 rollback: 1804 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1805 if (p->dev->mtu == p->old_mtu) 1806 continue; 1807 1808 if (dev_set_mtu(p->dev, p->old_mtu)) 1809 netdev_err(p->dev, "Failed to restore MTU\n"); 1810 } 1811 1812 return err; 1813 } 1814 1815 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1816 { 1817 struct dsa_hw_port *p, *n; 1818 1819 list_for_each_entry_safe(p, n, hw_port_list, list) 1820 kfree(p); 1821 } 1822 1823 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1824 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1825 { 1826 struct list_head hw_port_list; 1827 struct dsa_switch_tree *dst; 1828 int min_mtu = ETH_MAX_MTU; 1829 struct dsa_port *other_dp; 1830 int err; 1831 1832 if (!dp->ds->mtu_enforcement_ingress) 1833 return; 1834 1835 if (!dp->bridge) 1836 return; 1837 1838 INIT_LIST_HEAD(&hw_port_list); 1839 1840 /* Populate the list of ports that are part of the same bridge 1841 * as the newly added/modified port 1842 */ 1843 list_for_each_entry(dst, &dsa_tree_list, list) { 1844 list_for_each_entry(other_dp, &dst->ports, list) { 1845 struct dsa_hw_port *hw_port; 1846 struct net_device *slave; 1847 1848 if (other_dp->type != DSA_PORT_TYPE_USER) 1849 continue; 1850 1851 if (!dsa_port_bridge_same(dp, other_dp)) 1852 continue; 1853 1854 if (!other_dp->ds->mtu_enforcement_ingress) 1855 continue; 1856 1857 slave = other_dp->slave; 1858 1859 if (min_mtu > slave->mtu) 1860 min_mtu = slave->mtu; 1861 1862 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1863 if (!hw_port) 1864 goto out; 1865 1866 hw_port->dev = slave; 1867 hw_port->old_mtu = slave->mtu; 1868 1869 list_add(&hw_port->list, &hw_port_list); 1870 } 1871 } 1872 1873 /* Attempt to configure the entire hardware bridge to the newly added 1874 * interface's MTU first, regardless of whether the intention of the 1875 * user was to raise or lower it. 1876 */ 1877 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1878 if (!err) 1879 goto out; 1880 1881 /* Clearly that didn't work out so well, so just set the minimum MTU on 1882 * all hardware bridge ports now. If this fails too, then all ports will 1883 * still have their old MTU rolled back anyway. 1884 */ 1885 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1886 1887 out: 1888 dsa_hw_port_list_free(&hw_port_list); 1889 } 1890 1891 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1892 { 1893 struct net_device *master = dsa_slave_to_master(dev); 1894 struct dsa_port *dp = dsa_slave_to_port(dev); 1895 struct dsa_port *cpu_dp = dp->cpu_dp; 1896 struct dsa_switch *ds = dp->ds; 1897 struct dsa_port *other_dp; 1898 int largest_mtu = 0; 1899 int new_master_mtu; 1900 int old_master_mtu; 1901 int mtu_limit; 1902 int cpu_mtu; 1903 int err; 1904 1905 if (!ds->ops->port_change_mtu) 1906 return -EOPNOTSUPP; 1907 1908 dsa_tree_for_each_user_port(other_dp, ds->dst) { 1909 int slave_mtu; 1910 1911 /* During probe, this function will be called for each slave 1912 * device, while not all of them have been allocated. That's 1913 * ok, it doesn't change what the maximum is, so ignore it. 1914 */ 1915 if (!other_dp->slave) 1916 continue; 1917 1918 /* Pretend that we already applied the setting, which we 1919 * actually haven't (still haven't done all integrity checks) 1920 */ 1921 if (dp == other_dp) 1922 slave_mtu = new_mtu; 1923 else 1924 slave_mtu = other_dp->slave->mtu; 1925 1926 if (largest_mtu < slave_mtu) 1927 largest_mtu = slave_mtu; 1928 } 1929 1930 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1931 old_master_mtu = master->mtu; 1932 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops); 1933 if (new_master_mtu > mtu_limit) 1934 return -ERANGE; 1935 1936 /* If the master MTU isn't over limit, there's no need to check the CPU 1937 * MTU, since that surely isn't either. 1938 */ 1939 cpu_mtu = largest_mtu; 1940 1941 /* Start applying stuff */ 1942 if (new_master_mtu != old_master_mtu) { 1943 err = dev_set_mtu(master, new_master_mtu); 1944 if (err < 0) 1945 goto out_master_failed; 1946 1947 /* We only need to propagate the MTU of the CPU port to 1948 * upstream switches, so emit a notifier which updates them. 1949 */ 1950 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 1951 if (err) 1952 goto out_cpu_failed; 1953 } 1954 1955 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 1956 if (err) 1957 goto out_port_failed; 1958 1959 dev->mtu = new_mtu; 1960 1961 dsa_bridge_mtu_normalization(dp); 1962 1963 return 0; 1964 1965 out_port_failed: 1966 if (new_master_mtu != old_master_mtu) 1967 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1968 dsa_tag_protocol_overhead(cpu_dp->tag_ops)); 1969 out_cpu_failed: 1970 if (new_master_mtu != old_master_mtu) 1971 dev_set_mtu(master, old_master_mtu); 1972 out_master_failed: 1973 return err; 1974 } 1975 1976 static int __maybe_unused 1977 dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 1978 { 1979 struct dsa_port *dp = dsa_slave_to_port(dev); 1980 struct dsa_switch *ds = dp->ds; 1981 unsigned long mask, new_prio; 1982 int err, port = dp->index; 1983 1984 if (!ds->ops->port_set_default_prio) 1985 return -EOPNOTSUPP; 1986 1987 err = dcb_ieee_setapp(dev, app); 1988 if (err) 1989 return err; 1990 1991 mask = dcb_ieee_getapp_mask(dev, app); 1992 new_prio = __fls(mask); 1993 1994 err = ds->ops->port_set_default_prio(ds, port, new_prio); 1995 if (err) { 1996 dcb_ieee_delapp(dev, app); 1997 return err; 1998 } 1999 2000 return 0; 2001 } 2002 2003 static int __maybe_unused 2004 dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 2005 { 2006 struct dsa_port *dp = dsa_slave_to_port(dev); 2007 struct dsa_switch *ds = dp->ds; 2008 unsigned long mask, new_prio; 2009 int err, port = dp->index; 2010 u8 dscp = app->protocol; 2011 2012 if (!ds->ops->port_add_dscp_prio) 2013 return -EOPNOTSUPP; 2014 2015 if (dscp >= 64) { 2016 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 2017 dscp); 2018 return -EINVAL; 2019 } 2020 2021 err = dcb_ieee_setapp(dev, app); 2022 if (err) 2023 return err; 2024 2025 mask = dcb_ieee_getapp_mask(dev, app); 2026 new_prio = __fls(mask); 2027 2028 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 2029 if (err) { 2030 dcb_ieee_delapp(dev, app); 2031 return err; 2032 } 2033 2034 return 0; 2035 } 2036 2037 static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev, 2038 struct dcb_app *app) 2039 { 2040 switch (app->selector) { 2041 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2042 switch (app->protocol) { 2043 case 0: 2044 return dsa_slave_dcbnl_set_default_prio(dev, app); 2045 default: 2046 return -EOPNOTSUPP; 2047 } 2048 break; 2049 case IEEE_8021QAZ_APP_SEL_DSCP: 2050 return dsa_slave_dcbnl_add_dscp_prio(dev, app); 2051 default: 2052 return -EOPNOTSUPP; 2053 } 2054 } 2055 2056 static int __maybe_unused 2057 dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2058 { 2059 struct dsa_port *dp = dsa_slave_to_port(dev); 2060 struct dsa_switch *ds = dp->ds; 2061 unsigned long mask, new_prio; 2062 int err, port = dp->index; 2063 2064 if (!ds->ops->port_set_default_prio) 2065 return -EOPNOTSUPP; 2066 2067 err = dcb_ieee_delapp(dev, app); 2068 if (err) 2069 return err; 2070 2071 mask = dcb_ieee_getapp_mask(dev, app); 2072 new_prio = mask ? __fls(mask) : 0; 2073 2074 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2075 if (err) { 2076 dcb_ieee_setapp(dev, app); 2077 return err; 2078 } 2079 2080 return 0; 2081 } 2082 2083 static int __maybe_unused 2084 dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2085 { 2086 struct dsa_port *dp = dsa_slave_to_port(dev); 2087 struct dsa_switch *ds = dp->ds; 2088 int err, port = dp->index; 2089 u8 dscp = app->protocol; 2090 2091 if (!ds->ops->port_del_dscp_prio) 2092 return -EOPNOTSUPP; 2093 2094 err = dcb_ieee_delapp(dev, app); 2095 if (err) 2096 return err; 2097 2098 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2099 if (err) { 2100 dcb_ieee_setapp(dev, app); 2101 return err; 2102 } 2103 2104 return 0; 2105 } 2106 2107 static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev, 2108 struct dcb_app *app) 2109 { 2110 switch (app->selector) { 2111 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2112 switch (app->protocol) { 2113 case 0: 2114 return dsa_slave_dcbnl_del_default_prio(dev, app); 2115 default: 2116 return -EOPNOTSUPP; 2117 } 2118 break; 2119 case IEEE_8021QAZ_APP_SEL_DSCP: 2120 return dsa_slave_dcbnl_del_dscp_prio(dev, app); 2121 default: 2122 return -EOPNOTSUPP; 2123 } 2124 } 2125 2126 /* Pre-populate the DCB application priority table with the priorities 2127 * configured during switch setup, which we read from hardware here. 2128 */ 2129 static int dsa_slave_dcbnl_init(struct net_device *dev) 2130 { 2131 struct dsa_port *dp = dsa_slave_to_port(dev); 2132 struct dsa_switch *ds = dp->ds; 2133 int port = dp->index; 2134 int err; 2135 2136 if (ds->ops->port_get_default_prio) { 2137 int prio = ds->ops->port_get_default_prio(ds, port); 2138 struct dcb_app app = { 2139 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2140 .protocol = 0, 2141 .priority = prio, 2142 }; 2143 2144 if (prio < 0) 2145 return prio; 2146 2147 err = dcb_ieee_setapp(dev, &app); 2148 if (err) 2149 return err; 2150 } 2151 2152 if (ds->ops->port_get_dscp_prio) { 2153 int protocol; 2154 2155 for (protocol = 0; protocol < 64; protocol++) { 2156 struct dcb_app app = { 2157 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2158 .protocol = protocol, 2159 }; 2160 int prio; 2161 2162 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2163 if (prio == -EOPNOTSUPP) 2164 continue; 2165 if (prio < 0) 2166 return prio; 2167 2168 app.priority = prio; 2169 2170 err = dcb_ieee_setapp(dev, &app); 2171 if (err) 2172 return err; 2173 } 2174 } 2175 2176 return 0; 2177 } 2178 2179 static const struct ethtool_ops dsa_slave_ethtool_ops = { 2180 .get_drvinfo = dsa_slave_get_drvinfo, 2181 .get_regs_len = dsa_slave_get_regs_len, 2182 .get_regs = dsa_slave_get_regs, 2183 .nway_reset = dsa_slave_nway_reset, 2184 .get_link = ethtool_op_get_link, 2185 .get_eeprom_len = dsa_slave_get_eeprom_len, 2186 .get_eeprom = dsa_slave_get_eeprom, 2187 .set_eeprom = dsa_slave_set_eeprom, 2188 .get_strings = dsa_slave_get_strings, 2189 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 2190 .get_sset_count = dsa_slave_get_sset_count, 2191 .get_eth_phy_stats = dsa_slave_get_eth_phy_stats, 2192 .get_eth_mac_stats = dsa_slave_get_eth_mac_stats, 2193 .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats, 2194 .get_rmon_stats = dsa_slave_get_rmon_stats, 2195 .set_wol = dsa_slave_set_wol, 2196 .get_wol = dsa_slave_get_wol, 2197 .set_eee = dsa_slave_set_eee, 2198 .get_eee = dsa_slave_get_eee, 2199 .get_link_ksettings = dsa_slave_get_link_ksettings, 2200 .set_link_ksettings = dsa_slave_set_link_ksettings, 2201 .get_pause_stats = dsa_slave_get_pause_stats, 2202 .get_pauseparam = dsa_slave_get_pauseparam, 2203 .set_pauseparam = dsa_slave_set_pauseparam, 2204 .get_rxnfc = dsa_slave_get_rxnfc, 2205 .set_rxnfc = dsa_slave_set_rxnfc, 2206 .get_ts_info = dsa_slave_get_ts_info, 2207 .self_test = dsa_slave_net_selftest, 2208 }; 2209 2210 static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = { 2211 .ieee_setapp = dsa_slave_dcbnl_ieee_setapp, 2212 .ieee_delapp = dsa_slave_dcbnl_ieee_delapp, 2213 }; 2214 2215 static void dsa_slave_get_stats64(struct net_device *dev, 2216 struct rtnl_link_stats64 *s) 2217 { 2218 struct dsa_port *dp = dsa_slave_to_port(dev); 2219 struct dsa_switch *ds = dp->ds; 2220 2221 if (ds->ops->get_stats64) 2222 ds->ops->get_stats64(ds, dp->index, s); 2223 else 2224 dev_get_tstats64(dev, s); 2225 } 2226 2227 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, 2228 struct net_device_path *path) 2229 { 2230 struct dsa_port *dp = dsa_slave_to_port(ctx->dev); 2231 struct net_device *master = dsa_port_to_master(dp); 2232 struct dsa_port *cpu_dp = dp->cpu_dp; 2233 2234 path->dev = ctx->dev; 2235 path->type = DEV_PATH_DSA; 2236 path->dsa.proto = cpu_dp->tag_ops->proto; 2237 path->dsa.port = dp->index; 2238 ctx->dev = master; 2239 2240 return 0; 2241 } 2242 2243 static const struct net_device_ops dsa_slave_netdev_ops = { 2244 .ndo_open = dsa_slave_open, 2245 .ndo_stop = dsa_slave_close, 2246 .ndo_start_xmit = dsa_slave_xmit, 2247 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 2248 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 2249 .ndo_set_mac_address = dsa_slave_set_mac_address, 2250 .ndo_fdb_dump = dsa_slave_fdb_dump, 2251 .ndo_eth_ioctl = dsa_slave_ioctl, 2252 .ndo_get_iflink = dsa_slave_get_iflink, 2253 #ifdef CONFIG_NET_POLL_CONTROLLER 2254 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 2255 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 2256 .ndo_poll_controller = dsa_slave_poll_controller, 2257 #endif 2258 .ndo_setup_tc = dsa_slave_setup_tc, 2259 .ndo_get_stats64 = dsa_slave_get_stats64, 2260 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 2261 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 2262 .ndo_change_mtu = dsa_slave_change_mtu, 2263 .ndo_fill_forward_path = dsa_slave_fill_forward_path, 2264 }; 2265 2266 static struct device_type dsa_type = { 2267 .name = "dsa", 2268 }; 2269 2270 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2271 { 2272 const struct dsa_port *dp = dsa_to_port(ds, port); 2273 2274 if (dp->pl) 2275 phylink_mac_change(dp->pl, up); 2276 } 2277 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2278 2279 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 2280 struct phylink_link_state *state) 2281 { 2282 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 2283 struct dsa_switch *ds = dp->ds; 2284 2285 /* No need to check that this operation is valid, the callback would 2286 * not be called if it was not. 2287 */ 2288 ds->ops->phylink_fixed_state(ds, dp->index, state); 2289 } 2290 2291 /* slave device setup *******************************************************/ 2292 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr, 2293 u32 flags) 2294 { 2295 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2296 struct dsa_switch *ds = dp->ds; 2297 2298 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 2299 if (!slave_dev->phydev) { 2300 netdev_err(slave_dev, "no phy at %d\n", addr); 2301 return -ENODEV; 2302 } 2303 2304 slave_dev->phydev->dev_flags |= flags; 2305 2306 return phylink_connect_phy(dp->pl, slave_dev->phydev); 2307 } 2308 2309 static int dsa_slave_phy_setup(struct net_device *slave_dev) 2310 { 2311 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2312 struct device_node *port_dn = dp->dn; 2313 struct dsa_switch *ds = dp->ds; 2314 u32 phy_flags = 0; 2315 int ret; 2316 2317 dp->pl_config.dev = &slave_dev->dev; 2318 dp->pl_config.type = PHYLINK_NETDEV; 2319 2320 /* The get_fixed_state callback takes precedence over polling the 2321 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2322 * this if the switch provides such a callback. 2323 */ 2324 if (ds->ops->phylink_fixed_state) { 2325 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 2326 dp->pl_config.poll_fixed_state = true; 2327 } 2328 2329 ret = dsa_port_phylink_create(dp); 2330 if (ret) 2331 return ret; 2332 2333 if (ds->ops->get_phy_flags) 2334 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2335 2336 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2337 if (ret == -ENODEV && ds->slave_mii_bus) { 2338 /* We could not connect to a designated PHY or SFP, so try to 2339 * use the switch internal MDIO bus instead 2340 */ 2341 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags); 2342 } 2343 if (ret) { 2344 netdev_err(slave_dev, "failed to connect to PHY: %pe\n", 2345 ERR_PTR(ret)); 2346 dsa_port_phylink_destroy(dp); 2347 } 2348 2349 return ret; 2350 } 2351 2352 void dsa_slave_setup_tagger(struct net_device *slave) 2353 { 2354 struct dsa_port *dp = dsa_slave_to_port(slave); 2355 struct net_device *master = dsa_port_to_master(dp); 2356 struct dsa_slave_priv *p = netdev_priv(slave); 2357 const struct dsa_port *cpu_dp = dp->cpu_dp; 2358 const struct dsa_switch *ds = dp->ds; 2359 2360 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2361 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2362 /* Try to save one extra realloc later in the TX path (in the master) 2363 * by also inheriting the master's needed headroom and tailroom. 2364 * The 8021q driver also does this. 2365 */ 2366 slave->needed_headroom += master->needed_headroom; 2367 slave->needed_tailroom += master->needed_tailroom; 2368 2369 p->xmit = cpu_dp->tag_ops->xmit; 2370 2371 slave->features = master->vlan_features | NETIF_F_HW_TC; 2372 slave->hw_features |= NETIF_F_HW_TC; 2373 slave->features |= NETIF_F_LLTX; 2374 if (slave->needed_tailroom) 2375 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2376 if (ds->needs_standalone_vlan_filtering) 2377 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2378 } 2379 2380 int dsa_slave_suspend(struct net_device *slave_dev) 2381 { 2382 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2383 2384 if (!netif_running(slave_dev)) 2385 return 0; 2386 2387 netif_device_detach(slave_dev); 2388 2389 rtnl_lock(); 2390 phylink_stop(dp->pl); 2391 rtnl_unlock(); 2392 2393 return 0; 2394 } 2395 2396 int dsa_slave_resume(struct net_device *slave_dev) 2397 { 2398 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2399 2400 if (!netif_running(slave_dev)) 2401 return 0; 2402 2403 netif_device_attach(slave_dev); 2404 2405 rtnl_lock(); 2406 phylink_start(dp->pl); 2407 rtnl_unlock(); 2408 2409 return 0; 2410 } 2411 2412 int dsa_slave_create(struct dsa_port *port) 2413 { 2414 struct net_device *master = dsa_port_to_master(port); 2415 struct dsa_switch *ds = port->ds; 2416 struct net_device *slave_dev; 2417 struct dsa_slave_priv *p; 2418 const char *name; 2419 int assign_type; 2420 int ret; 2421 2422 if (!ds->num_tx_queues) 2423 ds->num_tx_queues = 1; 2424 2425 if (port->name) { 2426 name = port->name; 2427 assign_type = NET_NAME_PREDICTABLE; 2428 } else { 2429 name = "eth%d"; 2430 assign_type = NET_NAME_ENUM; 2431 } 2432 2433 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 2434 assign_type, ether_setup, 2435 ds->num_tx_queues, 1); 2436 if (slave_dev == NULL) 2437 return -ENOMEM; 2438 2439 slave_dev->rtnl_link_ops = &dsa_link_ops; 2440 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 2441 #if IS_ENABLED(CONFIG_DCB) 2442 slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops; 2443 #endif 2444 if (!is_zero_ether_addr(port->mac)) 2445 eth_hw_addr_set(slave_dev, port->mac); 2446 else 2447 eth_hw_addr_inherit(slave_dev, master); 2448 slave_dev->priv_flags |= IFF_NO_QUEUE; 2449 if (dsa_switch_supports_uc_filtering(ds)) 2450 slave_dev->priv_flags |= IFF_UNICAST_FLT; 2451 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 2452 if (ds->ops->port_max_mtu) 2453 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2454 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 2455 2456 SET_NETDEV_DEV(slave_dev, port->ds->dev); 2457 SET_NETDEV_DEVLINK_PORT(slave_dev, &port->devlink_port); 2458 slave_dev->dev.of_node = port->dn; 2459 slave_dev->vlan_features = master->vlan_features; 2460 2461 p = netdev_priv(slave_dev); 2462 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2463 if (!slave_dev->tstats) { 2464 free_netdev(slave_dev); 2465 return -ENOMEM; 2466 } 2467 2468 ret = gro_cells_init(&p->gcells, slave_dev); 2469 if (ret) 2470 goto out_free; 2471 2472 p->dp = port; 2473 INIT_LIST_HEAD(&p->mall_tc_list); 2474 port->slave = slave_dev; 2475 dsa_slave_setup_tagger(slave_dev); 2476 2477 netif_carrier_off(slave_dev); 2478 2479 ret = dsa_slave_phy_setup(slave_dev); 2480 if (ret) { 2481 netdev_err(slave_dev, 2482 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2483 ret, ds->dst->index, ds->index, port->index); 2484 goto out_gcells; 2485 } 2486 2487 rtnl_lock(); 2488 2489 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 2490 if (ret && ret != -EOPNOTSUPP) 2491 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2492 ret, ETH_DATA_LEN, port->index); 2493 2494 ret = register_netdevice(slave_dev); 2495 if (ret) { 2496 netdev_err(master, "error %d registering interface %s\n", 2497 ret, slave_dev->name); 2498 rtnl_unlock(); 2499 goto out_phy; 2500 } 2501 2502 if (IS_ENABLED(CONFIG_DCB)) { 2503 ret = dsa_slave_dcbnl_init(slave_dev); 2504 if (ret) { 2505 netdev_err(slave_dev, 2506 "failed to initialize DCB: %pe\n", 2507 ERR_PTR(ret)); 2508 rtnl_unlock(); 2509 goto out_unregister; 2510 } 2511 } 2512 2513 ret = netdev_upper_dev_link(master, slave_dev, NULL); 2514 2515 rtnl_unlock(); 2516 2517 if (ret) 2518 goto out_unregister; 2519 2520 return 0; 2521 2522 out_unregister: 2523 unregister_netdev(slave_dev); 2524 out_phy: 2525 rtnl_lock(); 2526 phylink_disconnect_phy(p->dp->pl); 2527 rtnl_unlock(); 2528 dsa_port_phylink_destroy(p->dp); 2529 out_gcells: 2530 gro_cells_destroy(&p->gcells); 2531 out_free: 2532 free_percpu(slave_dev->tstats); 2533 free_netdev(slave_dev); 2534 port->slave = NULL; 2535 return ret; 2536 } 2537 2538 void dsa_slave_destroy(struct net_device *slave_dev) 2539 { 2540 struct net_device *master = dsa_slave_to_master(slave_dev); 2541 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2542 struct dsa_slave_priv *p = netdev_priv(slave_dev); 2543 2544 netif_carrier_off(slave_dev); 2545 rtnl_lock(); 2546 netdev_upper_dev_unlink(master, slave_dev); 2547 unregister_netdevice(slave_dev); 2548 phylink_disconnect_phy(dp->pl); 2549 rtnl_unlock(); 2550 2551 dsa_port_phylink_destroy(dp); 2552 gro_cells_destroy(&p->gcells); 2553 free_percpu(slave_dev->tstats); 2554 free_netdev(slave_dev); 2555 } 2556 2557 int dsa_slave_change_master(struct net_device *dev, struct net_device *master, 2558 struct netlink_ext_ack *extack) 2559 { 2560 struct net_device *old_master = dsa_slave_to_master(dev); 2561 struct dsa_port *dp = dsa_slave_to_port(dev); 2562 struct dsa_switch *ds = dp->ds; 2563 struct net_device *upper; 2564 struct list_head *iter; 2565 int err; 2566 2567 if (master == old_master) 2568 return 0; 2569 2570 if (!ds->ops->port_change_master) { 2571 NL_SET_ERR_MSG_MOD(extack, 2572 "Driver does not support changing DSA master"); 2573 return -EOPNOTSUPP; 2574 } 2575 2576 if (!netdev_uses_dsa(master)) { 2577 NL_SET_ERR_MSG_MOD(extack, 2578 "Interface not eligible as DSA master"); 2579 return -EOPNOTSUPP; 2580 } 2581 2582 netdev_for_each_upper_dev_rcu(master, upper, iter) { 2583 if (dsa_slave_dev_check(upper)) 2584 continue; 2585 if (netif_is_bridge_master(upper)) 2586 continue; 2587 NL_SET_ERR_MSG_MOD(extack, "Cannot join master with unknown uppers"); 2588 return -EOPNOTSUPP; 2589 } 2590 2591 /* Since we allow live-changing the DSA master, plus we auto-open the 2592 * DSA master when the user port opens => we need to ensure that the 2593 * new DSA master is open too. 2594 */ 2595 if (dev->flags & IFF_UP) { 2596 err = dev_open(master, extack); 2597 if (err) 2598 return err; 2599 } 2600 2601 netdev_upper_dev_unlink(old_master, dev); 2602 2603 err = netdev_upper_dev_link(master, dev, extack); 2604 if (err) 2605 goto out_revert_old_master_unlink; 2606 2607 err = dsa_port_change_master(dp, master, extack); 2608 if (err) 2609 goto out_revert_master_link; 2610 2611 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2612 err = dsa_slave_change_mtu(dev, dev->mtu); 2613 if (err && err != -EOPNOTSUPP) { 2614 netdev_warn(dev, 2615 "nonfatal error updating MTU with new master: %pe\n", 2616 ERR_PTR(err)); 2617 } 2618 2619 /* If the port doesn't have its own MAC address and relies on the DSA 2620 * master's one, inherit it again from the new DSA master. 2621 */ 2622 if (is_zero_ether_addr(dp->mac)) 2623 eth_hw_addr_inherit(dev, master); 2624 2625 return 0; 2626 2627 out_revert_master_link: 2628 netdev_upper_dev_unlink(master, dev); 2629 out_revert_old_master_unlink: 2630 netdev_upper_dev_link(old_master, dev, NULL); 2631 return err; 2632 } 2633 2634 bool dsa_slave_dev_check(const struct net_device *dev) 2635 { 2636 return dev->netdev_ops == &dsa_slave_netdev_ops; 2637 } 2638 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 2639 2640 static int dsa_slave_changeupper(struct net_device *dev, 2641 struct netdev_notifier_changeupper_info *info) 2642 { 2643 struct dsa_port *dp = dsa_slave_to_port(dev); 2644 struct netlink_ext_ack *extack; 2645 int err = NOTIFY_DONE; 2646 2647 if (!dsa_slave_dev_check(dev)) 2648 return err; 2649 2650 extack = netdev_notifier_info_to_extack(&info->info); 2651 2652 if (netif_is_bridge_master(info->upper_dev)) { 2653 if (info->linking) { 2654 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2655 if (!err) 2656 dsa_bridge_mtu_normalization(dp); 2657 if (err == -EOPNOTSUPP) { 2658 if (extack && !extack->_msg) 2659 NL_SET_ERR_MSG_MOD(extack, 2660 "Offloading not supported"); 2661 err = 0; 2662 } 2663 err = notifier_from_errno(err); 2664 } else { 2665 dsa_port_bridge_leave(dp, info->upper_dev); 2666 err = NOTIFY_OK; 2667 } 2668 } else if (netif_is_lag_master(info->upper_dev)) { 2669 if (info->linking) { 2670 err = dsa_port_lag_join(dp, info->upper_dev, 2671 info->upper_info, extack); 2672 if (err == -EOPNOTSUPP) { 2673 NL_SET_ERR_MSG_MOD(info->info.extack, 2674 "Offloading not supported"); 2675 err = 0; 2676 } 2677 err = notifier_from_errno(err); 2678 } else { 2679 dsa_port_lag_leave(dp, info->upper_dev); 2680 err = NOTIFY_OK; 2681 } 2682 } else if (is_hsr_master(info->upper_dev)) { 2683 if (info->linking) { 2684 err = dsa_port_hsr_join(dp, info->upper_dev); 2685 if (err == -EOPNOTSUPP) { 2686 NL_SET_ERR_MSG_MOD(info->info.extack, 2687 "Offloading not supported"); 2688 err = 0; 2689 } 2690 err = notifier_from_errno(err); 2691 } else { 2692 dsa_port_hsr_leave(dp, info->upper_dev); 2693 err = NOTIFY_OK; 2694 } 2695 } 2696 2697 return err; 2698 } 2699 2700 static int dsa_slave_prechangeupper(struct net_device *dev, 2701 struct netdev_notifier_changeupper_info *info) 2702 { 2703 struct dsa_port *dp = dsa_slave_to_port(dev); 2704 2705 if (!dsa_slave_dev_check(dev)) 2706 return NOTIFY_DONE; 2707 2708 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2709 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2710 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2711 dsa_port_pre_lag_leave(dp, info->upper_dev); 2712 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be 2713 * meaningfully enslaved to a bridge yet 2714 */ 2715 2716 return NOTIFY_DONE; 2717 } 2718 2719 static int 2720 dsa_slave_lag_changeupper(struct net_device *dev, 2721 struct netdev_notifier_changeupper_info *info) 2722 { 2723 struct net_device *lower; 2724 struct list_head *iter; 2725 int err = NOTIFY_DONE; 2726 struct dsa_port *dp; 2727 2728 if (!netif_is_lag_master(dev)) 2729 return err; 2730 2731 netdev_for_each_lower_dev(dev, lower, iter) { 2732 if (!dsa_slave_dev_check(lower)) 2733 continue; 2734 2735 dp = dsa_slave_to_port(lower); 2736 if (!dp->lag) 2737 /* Software LAG */ 2738 continue; 2739 2740 err = dsa_slave_changeupper(lower, info); 2741 if (notifier_to_errno(err)) 2742 break; 2743 } 2744 2745 return err; 2746 } 2747 2748 /* Same as dsa_slave_lag_changeupper() except that it calls 2749 * dsa_slave_prechangeupper() 2750 */ 2751 static int 2752 dsa_slave_lag_prechangeupper(struct net_device *dev, 2753 struct netdev_notifier_changeupper_info *info) 2754 { 2755 struct net_device *lower; 2756 struct list_head *iter; 2757 int err = NOTIFY_DONE; 2758 struct dsa_port *dp; 2759 2760 if (!netif_is_lag_master(dev)) 2761 return err; 2762 2763 netdev_for_each_lower_dev(dev, lower, iter) { 2764 if (!dsa_slave_dev_check(lower)) 2765 continue; 2766 2767 dp = dsa_slave_to_port(lower); 2768 if (!dp->lag) 2769 /* Software LAG */ 2770 continue; 2771 2772 err = dsa_slave_prechangeupper(lower, info); 2773 if (notifier_to_errno(err)) 2774 break; 2775 } 2776 2777 return err; 2778 } 2779 2780 static int 2781 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 2782 struct netdev_notifier_changeupper_info *info) 2783 { 2784 struct netlink_ext_ack *ext_ack; 2785 struct net_device *slave, *br; 2786 struct dsa_port *dp; 2787 2788 ext_ack = netdev_notifier_info_to_extack(&info->info); 2789 2790 if (!is_vlan_dev(dev)) 2791 return NOTIFY_DONE; 2792 2793 slave = vlan_dev_real_dev(dev); 2794 if (!dsa_slave_dev_check(slave)) 2795 return NOTIFY_DONE; 2796 2797 dp = dsa_slave_to_port(slave); 2798 br = dsa_port_bridge_dev_get(dp); 2799 if (!br) 2800 return NOTIFY_DONE; 2801 2802 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 2803 if (br_vlan_enabled(br) && 2804 netif_is_bridge_master(info->upper_dev) && info->linking) { 2805 NL_SET_ERR_MSG_MOD(ext_ack, 2806 "Cannot enslave VLAN device into VLAN aware bridge"); 2807 return notifier_from_errno(-EINVAL); 2808 } 2809 2810 return NOTIFY_DONE; 2811 } 2812 2813 static int 2814 dsa_slave_check_8021q_upper(struct net_device *dev, 2815 struct netdev_notifier_changeupper_info *info) 2816 { 2817 struct dsa_port *dp = dsa_slave_to_port(dev); 2818 struct net_device *br = dsa_port_bridge_dev_get(dp); 2819 struct bridge_vlan_info br_info; 2820 struct netlink_ext_ack *extack; 2821 int err = NOTIFY_DONE; 2822 u16 vid; 2823 2824 if (!br || !br_vlan_enabled(br)) 2825 return NOTIFY_DONE; 2826 2827 extack = netdev_notifier_info_to_extack(&info->info); 2828 vid = vlan_dev_vlan_id(info->upper_dev); 2829 2830 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2831 * device, respectively the VID is not found, returning 2832 * 0 means success, which is a failure for us here. 2833 */ 2834 err = br_vlan_get_info(br, vid, &br_info); 2835 if (err == 0) { 2836 NL_SET_ERR_MSG_MOD(extack, 2837 "This VLAN is already configured by the bridge"); 2838 return notifier_from_errno(-EBUSY); 2839 } 2840 2841 return NOTIFY_DONE; 2842 } 2843 2844 static int 2845 dsa_slave_prechangeupper_sanity_check(struct net_device *dev, 2846 struct netdev_notifier_changeupper_info *info) 2847 { 2848 struct dsa_switch *ds; 2849 struct dsa_port *dp; 2850 int err; 2851 2852 if (!dsa_slave_dev_check(dev)) 2853 return dsa_prevent_bridging_8021q_upper(dev, info); 2854 2855 dp = dsa_slave_to_port(dev); 2856 ds = dp->ds; 2857 2858 if (ds->ops->port_prechangeupper) { 2859 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2860 if (err) 2861 return notifier_from_errno(err); 2862 } 2863 2864 if (is_vlan_dev(info->upper_dev)) 2865 return dsa_slave_check_8021q_upper(dev, info); 2866 2867 return NOTIFY_DONE; 2868 } 2869 2870 /* To be eligible as a DSA master, a LAG must have all lower interfaces be 2871 * eligible DSA masters. Additionally, all LAG slaves must be DSA masters of 2872 * switches in the same switch tree. 2873 */ 2874 static int dsa_lag_master_validate(struct net_device *lag_dev, 2875 struct netlink_ext_ack *extack) 2876 { 2877 struct net_device *lower1, *lower2; 2878 struct list_head *iter1, *iter2; 2879 2880 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 2881 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 2882 if (!netdev_uses_dsa(lower1) || 2883 !netdev_uses_dsa(lower2)) { 2884 NL_SET_ERR_MSG_MOD(extack, 2885 "All LAG ports must be eligible as DSA masters"); 2886 return notifier_from_errno(-EINVAL); 2887 } 2888 2889 if (lower1 == lower2) 2890 continue; 2891 2892 if (!dsa_port_tree_same(lower1->dsa_ptr, 2893 lower2->dsa_ptr)) { 2894 NL_SET_ERR_MSG_MOD(extack, 2895 "LAG contains DSA masters of disjoint switch trees"); 2896 return notifier_from_errno(-EINVAL); 2897 } 2898 } 2899 } 2900 2901 return NOTIFY_DONE; 2902 } 2903 2904 static int 2905 dsa_master_prechangeupper_sanity_check(struct net_device *master, 2906 struct netdev_notifier_changeupper_info *info) 2907 { 2908 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2909 2910 if (!netdev_uses_dsa(master)) 2911 return NOTIFY_DONE; 2912 2913 if (!info->linking) 2914 return NOTIFY_DONE; 2915 2916 /* Allow DSA switch uppers */ 2917 if (dsa_slave_dev_check(info->upper_dev)) 2918 return NOTIFY_DONE; 2919 2920 /* Allow bridge uppers of DSA masters, subject to further 2921 * restrictions in dsa_bridge_prechangelower_sanity_check() 2922 */ 2923 if (netif_is_bridge_master(info->upper_dev)) 2924 return NOTIFY_DONE; 2925 2926 /* Allow LAG uppers, subject to further restrictions in 2927 * dsa_lag_master_prechangelower_sanity_check() 2928 */ 2929 if (netif_is_lag_master(info->upper_dev)) 2930 return dsa_lag_master_validate(info->upper_dev, extack); 2931 2932 NL_SET_ERR_MSG_MOD(extack, 2933 "DSA master cannot join unknown upper interfaces"); 2934 return notifier_from_errno(-EBUSY); 2935 } 2936 2937 static int 2938 dsa_lag_master_prechangelower_sanity_check(struct net_device *dev, 2939 struct netdev_notifier_changeupper_info *info) 2940 { 2941 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2942 struct net_device *lag_dev = info->upper_dev; 2943 struct net_device *lower; 2944 struct list_head *iter; 2945 2946 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 2947 return NOTIFY_DONE; 2948 2949 if (!info->linking) 2950 return NOTIFY_DONE; 2951 2952 if (!netdev_uses_dsa(dev)) { 2953 NL_SET_ERR_MSG(extack, 2954 "Only DSA masters can join a LAG DSA master"); 2955 return notifier_from_errno(-EINVAL); 2956 } 2957 2958 netdev_for_each_lower_dev(lag_dev, lower, iter) { 2959 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 2960 NL_SET_ERR_MSG(extack, 2961 "Interface is DSA master for a different switch tree than this LAG"); 2962 return notifier_from_errno(-EINVAL); 2963 } 2964 2965 break; 2966 } 2967 2968 return NOTIFY_DONE; 2969 } 2970 2971 /* Don't allow bridging of DSA masters, since the bridge layer rx_handler 2972 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 2973 * chance to strip off and parse the DSA switch tag protocol header (the bridge 2974 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 2975 * frames). 2976 * The only case where that would not be an issue is when bridging can already 2977 * be offloaded, such as when the DSA master is itself a DSA or plain switchdev 2978 * port, and is bridged only with other ports from the same hardware device. 2979 */ 2980 static int 2981 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 2982 struct netdev_notifier_changeupper_info *info) 2983 { 2984 struct net_device *br = info->upper_dev; 2985 struct netlink_ext_ack *extack; 2986 struct net_device *lower; 2987 struct list_head *iter; 2988 2989 if (!netif_is_bridge_master(br)) 2990 return NOTIFY_DONE; 2991 2992 if (!info->linking) 2993 return NOTIFY_DONE; 2994 2995 extack = netdev_notifier_info_to_extack(&info->info); 2996 2997 netdev_for_each_lower_dev(br, lower, iter) { 2998 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 2999 continue; 3000 3001 if (!netdev_port_same_parent_id(lower, new_lower)) { 3002 NL_SET_ERR_MSG(extack, 3003 "Cannot do software bridging with a DSA master"); 3004 return notifier_from_errno(-EINVAL); 3005 } 3006 } 3007 3008 return NOTIFY_DONE; 3009 } 3010 3011 static void dsa_tree_migrate_ports_from_lag_master(struct dsa_switch_tree *dst, 3012 struct net_device *lag_dev) 3013 { 3014 struct net_device *new_master = dsa_tree_find_first_master(dst); 3015 struct dsa_port *dp; 3016 int err; 3017 3018 dsa_tree_for_each_user_port(dp, dst) { 3019 if (dsa_port_to_master(dp) != lag_dev) 3020 continue; 3021 3022 err = dsa_slave_change_master(dp->slave, new_master, NULL); 3023 if (err) { 3024 netdev_err(dp->slave, 3025 "failed to restore master to %s: %pe\n", 3026 new_master->name, ERR_PTR(err)); 3027 } 3028 } 3029 } 3030 3031 static int dsa_master_lag_join(struct net_device *master, 3032 struct net_device *lag_dev, 3033 struct netdev_lag_upper_info *uinfo, 3034 struct netlink_ext_ack *extack) 3035 { 3036 struct dsa_port *cpu_dp = master->dsa_ptr; 3037 struct dsa_switch_tree *dst = cpu_dp->dst; 3038 struct dsa_port *dp; 3039 int err; 3040 3041 err = dsa_master_lag_setup(lag_dev, cpu_dp, uinfo, extack); 3042 if (err) 3043 return err; 3044 3045 dsa_tree_for_each_user_port(dp, dst) { 3046 if (dsa_port_to_master(dp) != master) 3047 continue; 3048 3049 err = dsa_slave_change_master(dp->slave, lag_dev, extack); 3050 if (err) 3051 goto restore; 3052 } 3053 3054 return 0; 3055 3056 restore: 3057 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3058 if (dsa_port_to_master(dp) != lag_dev) 3059 continue; 3060 3061 err = dsa_slave_change_master(dp->slave, master, NULL); 3062 if (err) { 3063 netdev_err(dp->slave, 3064 "failed to restore master to %s: %pe\n", 3065 master->name, ERR_PTR(err)); 3066 } 3067 } 3068 3069 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3070 3071 return err; 3072 } 3073 3074 static void dsa_master_lag_leave(struct net_device *master, 3075 struct net_device *lag_dev) 3076 { 3077 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3078 struct dsa_switch_tree *dst = cpu_dp->dst; 3079 struct dsa_port *new_cpu_dp = NULL; 3080 struct net_device *lower; 3081 struct list_head *iter; 3082 3083 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3084 if (netdev_uses_dsa(lower)) { 3085 new_cpu_dp = lower->dsa_ptr; 3086 break; 3087 } 3088 } 3089 3090 if (new_cpu_dp) { 3091 /* Update the CPU port of the user ports still under the LAG 3092 * so that dsa_port_to_master() continues to work properly 3093 */ 3094 dsa_tree_for_each_user_port(dp, dst) 3095 if (dsa_port_to_master(dp) == lag_dev) 3096 dp->cpu_dp = new_cpu_dp; 3097 3098 /* Update the index of the virtual CPU port to match the lowest 3099 * physical CPU port 3100 */ 3101 lag_dev->dsa_ptr = new_cpu_dp; 3102 wmb(); 3103 } else { 3104 /* If the LAG DSA master has no ports left, migrate back all 3105 * user ports to the first physical CPU port 3106 */ 3107 dsa_tree_migrate_ports_from_lag_master(dst, lag_dev); 3108 } 3109 3110 /* This DSA master has left its LAG in any case, so let 3111 * the CPU port leave the hardware LAG as well 3112 */ 3113 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3114 } 3115 3116 static int dsa_master_changeupper(struct net_device *dev, 3117 struct netdev_notifier_changeupper_info *info) 3118 { 3119 struct netlink_ext_ack *extack; 3120 int err = NOTIFY_DONE; 3121 3122 if (!netdev_uses_dsa(dev)) 3123 return err; 3124 3125 extack = netdev_notifier_info_to_extack(&info->info); 3126 3127 if (netif_is_lag_master(info->upper_dev)) { 3128 if (info->linking) { 3129 err = dsa_master_lag_join(dev, info->upper_dev, 3130 info->upper_info, extack); 3131 err = notifier_from_errno(err); 3132 } else { 3133 dsa_master_lag_leave(dev, info->upper_dev); 3134 err = NOTIFY_OK; 3135 } 3136 } 3137 3138 return err; 3139 } 3140 3141 static int dsa_slave_netdevice_event(struct notifier_block *nb, 3142 unsigned long event, void *ptr) 3143 { 3144 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3145 3146 switch (event) { 3147 case NETDEV_PRECHANGEUPPER: { 3148 struct netdev_notifier_changeupper_info *info = ptr; 3149 int err; 3150 3151 err = dsa_slave_prechangeupper_sanity_check(dev, info); 3152 if (notifier_to_errno(err)) 3153 return err; 3154 3155 err = dsa_master_prechangeupper_sanity_check(dev, info); 3156 if (notifier_to_errno(err)) 3157 return err; 3158 3159 err = dsa_lag_master_prechangelower_sanity_check(dev, info); 3160 if (notifier_to_errno(err)) 3161 return err; 3162 3163 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3164 if (notifier_to_errno(err)) 3165 return err; 3166 3167 err = dsa_slave_prechangeupper(dev, ptr); 3168 if (notifier_to_errno(err)) 3169 return err; 3170 3171 err = dsa_slave_lag_prechangeupper(dev, ptr); 3172 if (notifier_to_errno(err)) 3173 return err; 3174 3175 break; 3176 } 3177 case NETDEV_CHANGEUPPER: { 3178 int err; 3179 3180 err = dsa_slave_changeupper(dev, ptr); 3181 if (notifier_to_errno(err)) 3182 return err; 3183 3184 err = dsa_slave_lag_changeupper(dev, ptr); 3185 if (notifier_to_errno(err)) 3186 return err; 3187 3188 err = dsa_master_changeupper(dev, ptr); 3189 if (notifier_to_errno(err)) 3190 return err; 3191 3192 break; 3193 } 3194 case NETDEV_CHANGELOWERSTATE: { 3195 struct netdev_notifier_changelowerstate_info *info = ptr; 3196 struct dsa_port *dp; 3197 int err = 0; 3198 3199 if (dsa_slave_dev_check(dev)) { 3200 dp = dsa_slave_to_port(dev); 3201 3202 err = dsa_port_lag_change(dp, info->lower_state_info); 3203 } 3204 3205 /* Mirror LAG port events on DSA masters that are in 3206 * a LAG towards their respective switch CPU ports 3207 */ 3208 if (netdev_uses_dsa(dev)) { 3209 dp = dev->dsa_ptr; 3210 3211 err = dsa_port_lag_change(dp, info->lower_state_info); 3212 } 3213 3214 return notifier_from_errno(err); 3215 } 3216 case NETDEV_CHANGE: 3217 case NETDEV_UP: { 3218 /* Track state of master port. 3219 * DSA driver may require the master port (and indirectly 3220 * the tagger) to be available for some special operation. 3221 */ 3222 if (netdev_uses_dsa(dev)) { 3223 struct dsa_port *cpu_dp = dev->dsa_ptr; 3224 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3225 3226 /* Track when the master port is UP */ 3227 dsa_tree_master_oper_state_change(dst, dev, 3228 netif_oper_up(dev)); 3229 3230 /* Track when the master port is ready and can accept 3231 * packet. 3232 * NETDEV_UP event is not enough to flag a port as ready. 3233 * We also have to wait for linkwatch_do_dev to dev_activate 3234 * and emit a NETDEV_CHANGE event. 3235 * We check if a master port is ready by checking if the dev 3236 * have a qdisc assigned and is not noop. 3237 */ 3238 dsa_tree_master_admin_state_change(dst, dev, 3239 !qdisc_tx_is_noop(dev)); 3240 3241 return NOTIFY_OK; 3242 } 3243 3244 return NOTIFY_DONE; 3245 } 3246 case NETDEV_GOING_DOWN: { 3247 struct dsa_port *dp, *cpu_dp; 3248 struct dsa_switch_tree *dst; 3249 LIST_HEAD(close_list); 3250 3251 if (!netdev_uses_dsa(dev)) 3252 return NOTIFY_DONE; 3253 3254 cpu_dp = dev->dsa_ptr; 3255 dst = cpu_dp->ds->dst; 3256 3257 dsa_tree_master_admin_state_change(dst, dev, false); 3258 3259 list_for_each_entry(dp, &dst->ports, list) { 3260 if (!dsa_port_is_user(dp)) 3261 continue; 3262 3263 if (dp->cpu_dp != cpu_dp) 3264 continue; 3265 3266 list_add(&dp->slave->close_list, &close_list); 3267 } 3268 3269 dev_close_many(&close_list, true); 3270 3271 return NOTIFY_OK; 3272 } 3273 default: 3274 break; 3275 } 3276 3277 return NOTIFY_DONE; 3278 } 3279 3280 static void 3281 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3282 { 3283 struct switchdev_notifier_fdb_info info = {}; 3284 3285 info.addr = switchdev_work->addr; 3286 info.vid = switchdev_work->vid; 3287 info.offloaded = true; 3288 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3289 switchdev_work->orig_dev, &info.info, NULL); 3290 } 3291 3292 static void dsa_slave_switchdev_event_work(struct work_struct *work) 3293 { 3294 struct dsa_switchdev_event_work *switchdev_work = 3295 container_of(work, struct dsa_switchdev_event_work, work); 3296 const unsigned char *addr = switchdev_work->addr; 3297 struct net_device *dev = switchdev_work->dev; 3298 u16 vid = switchdev_work->vid; 3299 struct dsa_switch *ds; 3300 struct dsa_port *dp; 3301 int err; 3302 3303 dp = dsa_slave_to_port(dev); 3304 ds = dp->ds; 3305 3306 switch (switchdev_work->event) { 3307 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3308 if (switchdev_work->host_addr) 3309 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3310 else if (dp->lag) 3311 err = dsa_port_lag_fdb_add(dp, addr, vid); 3312 else 3313 err = dsa_port_fdb_add(dp, addr, vid); 3314 if (err) { 3315 dev_err(ds->dev, 3316 "port %d failed to add %pM vid %d to fdb: %d\n", 3317 dp->index, addr, vid, err); 3318 break; 3319 } 3320 dsa_fdb_offload_notify(switchdev_work); 3321 break; 3322 3323 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3324 if (switchdev_work->host_addr) 3325 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3326 else if (dp->lag) 3327 err = dsa_port_lag_fdb_del(dp, addr, vid); 3328 else 3329 err = dsa_port_fdb_del(dp, addr, vid); 3330 if (err) { 3331 dev_err(ds->dev, 3332 "port %d failed to delete %pM vid %d from fdb: %d\n", 3333 dp->index, addr, vid, err); 3334 } 3335 3336 break; 3337 } 3338 3339 kfree(switchdev_work); 3340 } 3341 3342 static bool dsa_foreign_dev_check(const struct net_device *dev, 3343 const struct net_device *foreign_dev) 3344 { 3345 const struct dsa_port *dp = dsa_slave_to_port(dev); 3346 struct dsa_switch_tree *dst = dp->ds->dst; 3347 3348 if (netif_is_bridge_master(foreign_dev)) 3349 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3350 3351 if (netif_is_bridge_port(foreign_dev)) 3352 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3353 3354 /* Everything else is foreign */ 3355 return true; 3356 } 3357 3358 static int dsa_slave_fdb_event(struct net_device *dev, 3359 struct net_device *orig_dev, 3360 unsigned long event, const void *ctx, 3361 const struct switchdev_notifier_fdb_info *fdb_info) 3362 { 3363 struct dsa_switchdev_event_work *switchdev_work; 3364 struct dsa_port *dp = dsa_slave_to_port(dev); 3365 bool host_addr = fdb_info->is_local; 3366 struct dsa_switch *ds = dp->ds; 3367 3368 if (ctx && ctx != dp) 3369 return 0; 3370 3371 if (!dp->bridge) 3372 return 0; 3373 3374 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3375 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3376 return 0; 3377 3378 /* FDB entries learned by the software bridge or by foreign 3379 * bridge ports should be installed as host addresses only if 3380 * the driver requests assisted learning. 3381 */ 3382 if (!ds->assisted_learning_on_cpu_port) 3383 return 0; 3384 } 3385 3386 /* Also treat FDB entries on foreign interfaces bridged with us as host 3387 * addresses. 3388 */ 3389 if (dsa_foreign_dev_check(dev, orig_dev)) 3390 host_addr = true; 3391 3392 /* Check early that we're not doing work in vain. 3393 * Host addresses on LAG ports still require regular FDB ops, 3394 * since the CPU port isn't in a LAG. 3395 */ 3396 if (dp->lag && !host_addr) { 3397 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3398 return -EOPNOTSUPP; 3399 } else { 3400 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3401 return -EOPNOTSUPP; 3402 } 3403 3404 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3405 if (!switchdev_work) 3406 return -ENOMEM; 3407 3408 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3409 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3410 orig_dev->name, fdb_info->addr, fdb_info->vid, 3411 host_addr ? " as host address" : ""); 3412 3413 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work); 3414 switchdev_work->event = event; 3415 switchdev_work->dev = dev; 3416 switchdev_work->orig_dev = orig_dev; 3417 3418 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3419 switchdev_work->vid = fdb_info->vid; 3420 switchdev_work->host_addr = host_addr; 3421 3422 dsa_schedule_work(&switchdev_work->work); 3423 3424 return 0; 3425 } 3426 3427 /* Called under rcu_read_lock() */ 3428 static int dsa_slave_switchdev_event(struct notifier_block *unused, 3429 unsigned long event, void *ptr) 3430 { 3431 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3432 int err; 3433 3434 switch (event) { 3435 case SWITCHDEV_PORT_ATTR_SET: 3436 err = switchdev_handle_port_attr_set(dev, ptr, 3437 dsa_slave_dev_check, 3438 dsa_slave_port_attr_set); 3439 return notifier_from_errno(err); 3440 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3441 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3442 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3443 dsa_slave_dev_check, 3444 dsa_foreign_dev_check, 3445 dsa_slave_fdb_event); 3446 return notifier_from_errno(err); 3447 default: 3448 return NOTIFY_DONE; 3449 } 3450 3451 return NOTIFY_OK; 3452 } 3453 3454 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 3455 unsigned long event, void *ptr) 3456 { 3457 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3458 int err; 3459 3460 switch (event) { 3461 case SWITCHDEV_PORT_OBJ_ADD: 3462 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3463 dsa_slave_dev_check, 3464 dsa_foreign_dev_check, 3465 dsa_slave_port_obj_add); 3466 return notifier_from_errno(err); 3467 case SWITCHDEV_PORT_OBJ_DEL: 3468 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3469 dsa_slave_dev_check, 3470 dsa_foreign_dev_check, 3471 dsa_slave_port_obj_del); 3472 return notifier_from_errno(err); 3473 case SWITCHDEV_PORT_ATTR_SET: 3474 err = switchdev_handle_port_attr_set(dev, ptr, 3475 dsa_slave_dev_check, 3476 dsa_slave_port_attr_set); 3477 return notifier_from_errno(err); 3478 } 3479 3480 return NOTIFY_DONE; 3481 } 3482 3483 static struct notifier_block dsa_slave_nb __read_mostly = { 3484 .notifier_call = dsa_slave_netdevice_event, 3485 }; 3486 3487 struct notifier_block dsa_slave_switchdev_notifier = { 3488 .notifier_call = dsa_slave_switchdev_event, 3489 }; 3490 3491 struct notifier_block dsa_slave_switchdev_blocking_notifier = { 3492 .notifier_call = dsa_slave_switchdev_blocking_event, 3493 }; 3494 3495 int dsa_slave_register_notifier(void) 3496 { 3497 struct notifier_block *nb; 3498 int err; 3499 3500 err = register_netdevice_notifier(&dsa_slave_nb); 3501 if (err) 3502 return err; 3503 3504 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 3505 if (err) 3506 goto err_switchdev_nb; 3507 3508 nb = &dsa_slave_switchdev_blocking_notifier; 3509 err = register_switchdev_blocking_notifier(nb); 3510 if (err) 3511 goto err_switchdev_blocking_nb; 3512 3513 return 0; 3514 3515 err_switchdev_blocking_nb: 3516 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3517 err_switchdev_nb: 3518 unregister_netdevice_notifier(&dsa_slave_nb); 3519 return err; 3520 } 3521 3522 void dsa_slave_unregister_notifier(void) 3523 { 3524 struct notifier_block *nb; 3525 int err; 3526 3527 nb = &dsa_slave_switchdev_blocking_notifier; 3528 err = unregister_switchdev_blocking_notifier(nb); 3529 if (err) 3530 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3531 3532 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3533 if (err) 3534 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3535 3536 err = unregister_netdevice_notifier(&dsa_slave_nb); 3537 if (err) 3538 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 3539 } 3540