1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/dsa/user.c - user 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 #include <linux/string.h> 25 26 #include "conduit.h" 27 #include "dsa.h" 28 #include "netlink.h" 29 #include "port.h" 30 #include "switch.h" 31 #include "tag.h" 32 #include "user.h" 33 34 struct dsa_switchdev_event_work { 35 struct net_device *dev; 36 struct net_device *orig_dev; 37 struct work_struct work; 38 unsigned long event; 39 /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and 40 * SWITCHDEV_FDB_DEL_TO_DEVICE 41 */ 42 unsigned char addr[ETH_ALEN]; 43 u16 vid; 44 bool host_addr; 45 }; 46 47 enum dsa_standalone_event { 48 DSA_UC_ADD, 49 DSA_UC_DEL, 50 DSA_MC_ADD, 51 DSA_MC_DEL, 52 }; 53 54 struct dsa_standalone_event_work { 55 struct work_struct work; 56 struct net_device *dev; 57 enum dsa_standalone_event event; 58 unsigned char addr[ETH_ALEN]; 59 u16 vid; 60 }; 61 62 struct dsa_host_vlan_rx_filtering_ctx { 63 struct net_device *dev; 64 const unsigned char *addr; 65 enum dsa_standalone_event event; 66 }; 67 68 static bool dsa_switch_supports_uc_filtering(struct dsa_switch *ds) 69 { 70 return ds->ops->port_fdb_add && ds->ops->port_fdb_del && 71 ds->fdb_isolation && !ds->vlan_filtering_is_global && 72 !ds->needs_standalone_vlan_filtering; 73 } 74 75 static bool dsa_switch_supports_mc_filtering(struct dsa_switch *ds) 76 { 77 return ds->ops->port_mdb_add && ds->ops->port_mdb_del && 78 ds->fdb_isolation && !ds->vlan_filtering_is_global && 79 !ds->needs_standalone_vlan_filtering; 80 } 81 82 static void dsa_user_standalone_event_work(struct work_struct *work) 83 { 84 struct dsa_standalone_event_work *standalone_work = 85 container_of(work, struct dsa_standalone_event_work, work); 86 const unsigned char *addr = standalone_work->addr; 87 struct net_device *dev = standalone_work->dev; 88 struct dsa_port *dp = dsa_user_to_port(dev); 89 struct switchdev_obj_port_mdb mdb; 90 struct dsa_switch *ds = dp->ds; 91 u16 vid = standalone_work->vid; 92 int err; 93 94 switch (standalone_work->event) { 95 case DSA_UC_ADD: 96 err = dsa_port_standalone_host_fdb_add(dp, addr, vid); 97 if (err) { 98 dev_err(ds->dev, 99 "port %d failed to add %pM vid %d to fdb: %d\n", 100 dp->index, addr, vid, err); 101 break; 102 } 103 break; 104 105 case DSA_UC_DEL: 106 err = dsa_port_standalone_host_fdb_del(dp, addr, vid); 107 if (err) { 108 dev_err(ds->dev, 109 "port %d failed to delete %pM vid %d from fdb: %d\n", 110 dp->index, addr, vid, err); 111 } 112 113 break; 114 case DSA_MC_ADD: 115 ether_addr_copy(mdb.addr, addr); 116 mdb.vid = vid; 117 118 err = dsa_port_standalone_host_mdb_add(dp, &mdb); 119 if (err) { 120 dev_err(ds->dev, 121 "port %d failed to add %pM vid %d to mdb: %d\n", 122 dp->index, addr, vid, err); 123 break; 124 } 125 break; 126 case DSA_MC_DEL: 127 ether_addr_copy(mdb.addr, addr); 128 mdb.vid = vid; 129 130 err = dsa_port_standalone_host_mdb_del(dp, &mdb); 131 if (err) { 132 dev_err(ds->dev, 133 "port %d failed to delete %pM vid %d from mdb: %d\n", 134 dp->index, addr, vid, err); 135 } 136 137 break; 138 } 139 140 kfree(standalone_work); 141 } 142 143 static int dsa_user_schedule_standalone_work(struct net_device *dev, 144 enum dsa_standalone_event event, 145 const unsigned char *addr, 146 u16 vid) 147 { 148 struct dsa_standalone_event_work *standalone_work; 149 150 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC); 151 if (!standalone_work) 152 return -ENOMEM; 153 154 INIT_WORK(&standalone_work->work, dsa_user_standalone_event_work); 155 standalone_work->event = event; 156 standalone_work->dev = dev; 157 158 ether_addr_copy(standalone_work->addr, addr); 159 standalone_work->vid = vid; 160 161 dsa_schedule_work(&standalone_work->work); 162 163 return 0; 164 } 165 166 static int dsa_user_host_vlan_rx_filtering(void *arg, int vid) 167 { 168 struct dsa_host_vlan_rx_filtering_ctx *ctx = arg; 169 170 return dsa_user_schedule_standalone_work(ctx->dev, ctx->event, 171 ctx->addr, vid); 172 } 173 174 static int dsa_user_vlan_for_each(struct net_device *dev, 175 int (*cb)(void *arg, int vid), void *arg) 176 { 177 struct dsa_port *dp = dsa_user_to_port(dev); 178 struct dsa_vlan *v; 179 int err; 180 181 lockdep_assert_held(&dev->addr_list_lock); 182 183 err = cb(arg, 0); 184 if (err) 185 return err; 186 187 list_for_each_entry(v, &dp->user_vlans, list) { 188 err = cb(arg, v->vid); 189 if (err) 190 return err; 191 } 192 193 return 0; 194 } 195 196 static int dsa_user_sync_uc(struct net_device *dev, 197 const unsigned char *addr) 198 { 199 struct net_device *conduit = dsa_user_to_conduit(dev); 200 struct dsa_port *dp = dsa_user_to_port(dev); 201 struct dsa_host_vlan_rx_filtering_ctx ctx = { 202 .dev = dev, 203 .addr = addr, 204 .event = DSA_UC_ADD, 205 }; 206 207 dev_uc_add(conduit, addr); 208 209 if (!dsa_switch_supports_uc_filtering(dp->ds)) 210 return 0; 211 212 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering, 213 &ctx); 214 } 215 216 static int dsa_user_unsync_uc(struct net_device *dev, 217 const unsigned char *addr) 218 { 219 struct net_device *conduit = dsa_user_to_conduit(dev); 220 struct dsa_port *dp = dsa_user_to_port(dev); 221 struct dsa_host_vlan_rx_filtering_ctx ctx = { 222 .dev = dev, 223 .addr = addr, 224 .event = DSA_UC_DEL, 225 }; 226 227 dev_uc_del(conduit, addr); 228 229 if (!dsa_switch_supports_uc_filtering(dp->ds)) 230 return 0; 231 232 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering, 233 &ctx); 234 } 235 236 static int dsa_user_sync_mc(struct net_device *dev, 237 const unsigned char *addr) 238 { 239 struct net_device *conduit = dsa_user_to_conduit(dev); 240 struct dsa_port *dp = dsa_user_to_port(dev); 241 struct dsa_host_vlan_rx_filtering_ctx ctx = { 242 .dev = dev, 243 .addr = addr, 244 .event = DSA_MC_ADD, 245 }; 246 247 dev_mc_add(conduit, addr); 248 249 if (!dsa_switch_supports_mc_filtering(dp->ds)) 250 return 0; 251 252 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering, 253 &ctx); 254 } 255 256 static int dsa_user_unsync_mc(struct net_device *dev, 257 const unsigned char *addr) 258 { 259 struct net_device *conduit = dsa_user_to_conduit(dev); 260 struct dsa_port *dp = dsa_user_to_port(dev); 261 struct dsa_host_vlan_rx_filtering_ctx ctx = { 262 .dev = dev, 263 .addr = addr, 264 .event = DSA_MC_DEL, 265 }; 266 267 dev_mc_del(conduit, addr); 268 269 if (!dsa_switch_supports_mc_filtering(dp->ds)) 270 return 0; 271 272 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering, 273 &ctx); 274 } 275 276 void dsa_user_sync_ha(struct net_device *dev) 277 { 278 struct dsa_port *dp = dsa_user_to_port(dev); 279 struct dsa_switch *ds = dp->ds; 280 struct netdev_hw_addr *ha; 281 282 netif_addr_lock_bh(dev); 283 284 netdev_for_each_synced_mc_addr(ha, dev) 285 dsa_user_sync_mc(dev, ha->addr); 286 287 netdev_for_each_synced_uc_addr(ha, dev) 288 dsa_user_sync_uc(dev, ha->addr); 289 290 netif_addr_unlock_bh(dev); 291 292 if (dsa_switch_supports_uc_filtering(ds) || 293 dsa_switch_supports_mc_filtering(ds)) 294 dsa_flush_workqueue(); 295 } 296 297 void dsa_user_unsync_ha(struct net_device *dev) 298 { 299 struct dsa_port *dp = dsa_user_to_port(dev); 300 struct dsa_switch *ds = dp->ds; 301 struct netdev_hw_addr *ha; 302 303 netif_addr_lock_bh(dev); 304 305 netdev_for_each_synced_uc_addr(ha, dev) 306 dsa_user_unsync_uc(dev, ha->addr); 307 308 netdev_for_each_synced_mc_addr(ha, dev) 309 dsa_user_unsync_mc(dev, ha->addr); 310 311 netif_addr_unlock_bh(dev); 312 313 if (dsa_switch_supports_uc_filtering(ds) || 314 dsa_switch_supports_mc_filtering(ds)) 315 dsa_flush_workqueue(); 316 } 317 318 /* user mii_bus handling ***************************************************/ 319 static int dsa_user_phy_read(struct mii_bus *bus, int addr, int reg) 320 { 321 struct dsa_switch *ds = bus->priv; 322 323 if (ds->phys_mii_mask & (1 << addr)) 324 return ds->ops->phy_read(ds, addr, reg); 325 326 return 0xffff; 327 } 328 329 static int dsa_user_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 330 { 331 struct dsa_switch *ds = bus->priv; 332 333 if (ds->phys_mii_mask & (1 << addr)) 334 return ds->ops->phy_write(ds, addr, reg, val); 335 336 return 0; 337 } 338 339 void dsa_user_mii_bus_init(struct dsa_switch *ds) 340 { 341 ds->user_mii_bus->priv = (void *)ds; 342 ds->user_mii_bus->name = "dsa user smi"; 343 ds->user_mii_bus->read = dsa_user_phy_read; 344 ds->user_mii_bus->write = dsa_user_phy_write; 345 snprintf(ds->user_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 346 ds->dst->index, ds->index); 347 ds->user_mii_bus->parent = ds->dev; 348 ds->user_mii_bus->phy_mask = ~ds->phys_mii_mask; 349 } 350 351 352 /* user device handling ****************************************************/ 353 static int dsa_user_get_iflink(const struct net_device *dev) 354 { 355 return READ_ONCE(dsa_user_to_conduit(dev)->ifindex); 356 } 357 358 int dsa_user_host_uc_install(struct net_device *dev, const u8 *addr) 359 { 360 struct net_device *conduit = dsa_user_to_conduit(dev); 361 struct dsa_port *dp = dsa_user_to_port(dev); 362 struct dsa_switch *ds = dp->ds; 363 int err; 364 365 if (dsa_switch_supports_uc_filtering(ds)) { 366 err = dsa_port_standalone_host_fdb_add(dp, addr, 0); 367 if (err) 368 goto out; 369 } 370 371 if (!ether_addr_equal(addr, conduit->dev_addr)) { 372 err = dev_uc_add(conduit, addr); 373 if (err < 0) 374 goto del_host_addr; 375 } 376 377 return 0; 378 379 del_host_addr: 380 if (dsa_switch_supports_uc_filtering(ds)) 381 dsa_port_standalone_host_fdb_del(dp, addr, 0); 382 out: 383 return err; 384 } 385 386 void dsa_user_host_uc_uninstall(struct net_device *dev) 387 { 388 struct net_device *conduit = dsa_user_to_conduit(dev); 389 struct dsa_port *dp = dsa_user_to_port(dev); 390 struct dsa_switch *ds = dp->ds; 391 392 if (!ether_addr_equal(dev->dev_addr, conduit->dev_addr)) 393 dev_uc_del(conduit, dev->dev_addr); 394 395 if (dsa_switch_supports_uc_filtering(ds)) 396 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 397 } 398 399 static int dsa_user_open(struct net_device *dev) 400 { 401 struct net_device *conduit = dsa_user_to_conduit(dev); 402 struct dsa_port *dp = dsa_user_to_port(dev); 403 int err; 404 405 err = dev_open(conduit, NULL); 406 if (err < 0) { 407 netdev_err(dev, "failed to open conduit %s\n", conduit->name); 408 goto out; 409 } 410 411 err = dsa_user_host_uc_install(dev, dev->dev_addr); 412 if (err) 413 goto out; 414 415 err = dsa_port_enable_rt(dp, dev->phydev); 416 if (err) 417 goto out_del_host_uc; 418 419 return 0; 420 421 out_del_host_uc: 422 dsa_user_host_uc_uninstall(dev); 423 out: 424 return err; 425 } 426 427 static int dsa_user_close(struct net_device *dev) 428 { 429 struct dsa_port *dp = dsa_user_to_port(dev); 430 431 dsa_port_disable_rt(dp); 432 433 dsa_user_host_uc_uninstall(dev); 434 435 return 0; 436 } 437 438 static void dsa_user_manage_host_flood(struct net_device *dev) 439 { 440 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI); 441 struct dsa_port *dp = dsa_user_to_port(dev); 442 bool uc = dev->flags & IFF_PROMISC; 443 444 dsa_port_set_host_flood(dp, uc, mc); 445 } 446 447 static void dsa_user_change_rx_flags(struct net_device *dev, int change) 448 { 449 struct net_device *conduit = dsa_user_to_conduit(dev); 450 struct dsa_port *dp = dsa_user_to_port(dev); 451 struct dsa_switch *ds = dp->ds; 452 453 if (change & IFF_ALLMULTI) 454 dev_set_allmulti(conduit, 455 dev->flags & IFF_ALLMULTI ? 1 : -1); 456 if (change & IFF_PROMISC) 457 dev_set_promiscuity(conduit, 458 dev->flags & IFF_PROMISC ? 1 : -1); 459 460 if (dsa_switch_supports_uc_filtering(ds) && 461 dsa_switch_supports_mc_filtering(ds)) 462 dsa_user_manage_host_flood(dev); 463 } 464 465 static void dsa_user_set_rx_mode(struct net_device *dev) 466 { 467 __dev_mc_sync(dev, dsa_user_sync_mc, dsa_user_unsync_mc); 468 __dev_uc_sync(dev, dsa_user_sync_uc, dsa_user_unsync_uc); 469 } 470 471 static int dsa_user_set_mac_address(struct net_device *dev, void *a) 472 { 473 struct dsa_port *dp = dsa_user_to_port(dev); 474 struct dsa_switch *ds = dp->ds; 475 struct sockaddr *addr = a; 476 int err; 477 478 if (!is_valid_ether_addr(addr->sa_data)) 479 return -EADDRNOTAVAIL; 480 481 if (ds->ops->port_set_mac_address) { 482 err = ds->ops->port_set_mac_address(ds, dp->index, 483 addr->sa_data); 484 if (err) 485 return err; 486 } 487 488 /* If the port is down, the address isn't synced yet to hardware or 489 * to the DSA conduit, so there is nothing to change. 490 */ 491 if (!(dev->flags & IFF_UP)) 492 goto out_change_dev_addr; 493 494 err = dsa_user_host_uc_install(dev, addr->sa_data); 495 if (err) 496 return err; 497 498 dsa_user_host_uc_uninstall(dev); 499 500 out_change_dev_addr: 501 eth_hw_addr_set(dev, addr->sa_data); 502 503 return 0; 504 } 505 506 struct dsa_user_dump_ctx { 507 struct net_device *dev; 508 struct sk_buff *skb; 509 struct netlink_callback *cb; 510 int idx; 511 }; 512 513 static int 514 dsa_user_port_fdb_do_dump(const unsigned char *addr, u16 vid, 515 bool is_static, void *data) 516 { 517 struct dsa_user_dump_ctx *dump = data; 518 u32 portid = NETLINK_CB(dump->cb->skb).portid; 519 u32 seq = dump->cb->nlh->nlmsg_seq; 520 struct nlmsghdr *nlh; 521 struct ndmsg *ndm; 522 523 if (dump->idx < dump->cb->args[2]) 524 goto skip; 525 526 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 527 sizeof(*ndm), NLM_F_MULTI); 528 if (!nlh) 529 return -EMSGSIZE; 530 531 ndm = nlmsg_data(nlh); 532 ndm->ndm_family = AF_BRIDGE; 533 ndm->ndm_pad1 = 0; 534 ndm->ndm_pad2 = 0; 535 ndm->ndm_flags = NTF_SELF; 536 ndm->ndm_type = 0; 537 ndm->ndm_ifindex = dump->dev->ifindex; 538 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 539 540 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 541 goto nla_put_failure; 542 543 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 544 goto nla_put_failure; 545 546 nlmsg_end(dump->skb, nlh); 547 548 skip: 549 dump->idx++; 550 return 0; 551 552 nla_put_failure: 553 nlmsg_cancel(dump->skb, nlh); 554 return -EMSGSIZE; 555 } 556 557 static int 558 dsa_user_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 559 struct net_device *dev, struct net_device *filter_dev, 560 int *idx) 561 { 562 struct dsa_port *dp = dsa_user_to_port(dev); 563 struct dsa_user_dump_ctx dump = { 564 .dev = dev, 565 .skb = skb, 566 .cb = cb, 567 .idx = *idx, 568 }; 569 int err; 570 571 err = dsa_port_fdb_dump(dp, dsa_user_port_fdb_do_dump, &dump); 572 *idx = dump.idx; 573 574 return err; 575 } 576 577 static int dsa_user_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 578 { 579 struct dsa_user_priv *p = netdev_priv(dev); 580 struct dsa_switch *ds = p->dp->ds; 581 int port = p->dp->index; 582 583 /* Pass through to switch driver if it supports timestamping */ 584 switch (cmd) { 585 case SIOCGHWTSTAMP: 586 if (ds->ops->port_hwtstamp_get) 587 return ds->ops->port_hwtstamp_get(ds, port, ifr); 588 break; 589 case SIOCSHWTSTAMP: 590 if (ds->ops->port_hwtstamp_set) 591 return ds->ops->port_hwtstamp_set(ds, port, ifr); 592 break; 593 } 594 595 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 596 } 597 598 static int dsa_user_port_attr_set(struct net_device *dev, const void *ctx, 599 const struct switchdev_attr *attr, 600 struct netlink_ext_ack *extack) 601 { 602 struct dsa_port *dp = dsa_user_to_port(dev); 603 int ret; 604 605 if (ctx && ctx != dp) 606 return 0; 607 608 switch (attr->id) { 609 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 610 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 611 return -EOPNOTSUPP; 612 613 ret = dsa_port_set_state(dp, attr->u.stp_state, true); 614 break; 615 case SWITCHDEV_ATTR_ID_PORT_MST_STATE: 616 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 617 return -EOPNOTSUPP; 618 619 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack); 620 break; 621 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 622 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 623 return -EOPNOTSUPP; 624 625 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 626 extack); 627 break; 628 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 629 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 630 return -EOPNOTSUPP; 631 632 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 633 break; 634 case SWITCHDEV_ATTR_ID_BRIDGE_MST: 635 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 636 return -EOPNOTSUPP; 637 638 ret = dsa_port_mst_enable(dp, attr->u.mst, extack); 639 break; 640 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 641 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 642 return -EOPNOTSUPP; 643 644 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 645 extack); 646 break; 647 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 648 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 649 return -EOPNOTSUPP; 650 651 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 652 break; 653 case SWITCHDEV_ATTR_ID_VLAN_MSTI: 654 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 655 return -EOPNOTSUPP; 656 657 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti); 658 break; 659 default: 660 ret = -EOPNOTSUPP; 661 break; 662 } 663 664 return ret; 665 } 666 667 /* Must be called under rcu_read_lock() */ 668 static int 669 dsa_user_vlan_check_for_8021q_uppers(struct net_device *user, 670 const struct switchdev_obj_port_vlan *vlan) 671 { 672 struct net_device *upper_dev; 673 struct list_head *iter; 674 675 netdev_for_each_upper_dev_rcu(user, upper_dev, iter) { 676 u16 vid; 677 678 if (!is_vlan_dev(upper_dev)) 679 continue; 680 681 vid = vlan_dev_vlan_id(upper_dev); 682 if (vid == vlan->vid) 683 return -EBUSY; 684 } 685 686 return 0; 687 } 688 689 static int dsa_user_vlan_add(struct net_device *dev, 690 const struct switchdev_obj *obj, 691 struct netlink_ext_ack *extack) 692 { 693 struct dsa_port *dp = dsa_user_to_port(dev); 694 struct switchdev_obj_port_vlan *vlan; 695 int err; 696 697 if (dsa_port_skip_vlan_configuration(dp)) { 698 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 699 return 0; 700 } 701 702 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 703 704 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 705 * the same VID. 706 */ 707 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { 708 rcu_read_lock(); 709 err = dsa_user_vlan_check_for_8021q_uppers(dev, vlan); 710 rcu_read_unlock(); 711 if (err) { 712 NL_SET_ERR_MSG_MOD(extack, 713 "Port already has a VLAN upper with this VID"); 714 return err; 715 } 716 } 717 718 return dsa_port_vlan_add(dp, vlan, extack); 719 } 720 721 /* Offload a VLAN installed on the bridge or on a foreign interface by 722 * installing it as a VLAN towards the CPU port. 723 */ 724 static int dsa_user_host_vlan_add(struct net_device *dev, 725 const struct switchdev_obj *obj, 726 struct netlink_ext_ack *extack) 727 { 728 struct dsa_port *dp = dsa_user_to_port(dev); 729 struct switchdev_obj_port_vlan vlan; 730 731 /* Do nothing if this is a software bridge */ 732 if (!dp->bridge) 733 return -EOPNOTSUPP; 734 735 if (dsa_port_skip_vlan_configuration(dp)) { 736 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 737 return 0; 738 } 739 740 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 741 742 /* Even though drivers often handle CPU membership in special ways, 743 * it doesn't make sense to program a PVID, so clear this flag. 744 */ 745 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 746 747 return dsa_port_host_vlan_add(dp, &vlan, extack); 748 } 749 750 static int dsa_user_port_obj_add(struct net_device *dev, const void *ctx, 751 const struct switchdev_obj *obj, 752 struct netlink_ext_ack *extack) 753 { 754 struct dsa_port *dp = dsa_user_to_port(dev); 755 int err; 756 757 if (ctx && ctx != dp) 758 return 0; 759 760 switch (obj->id) { 761 case SWITCHDEV_OBJ_ID_PORT_MDB: 762 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 763 return -EOPNOTSUPP; 764 765 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 766 break; 767 case SWITCHDEV_OBJ_ID_HOST_MDB: 768 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 769 return -EOPNOTSUPP; 770 771 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 772 break; 773 case SWITCHDEV_OBJ_ID_PORT_VLAN: 774 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 775 err = dsa_user_vlan_add(dev, obj, extack); 776 else 777 err = dsa_user_host_vlan_add(dev, obj, extack); 778 break; 779 case SWITCHDEV_OBJ_ID_MRP: 780 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 781 return -EOPNOTSUPP; 782 783 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 784 break; 785 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 786 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 787 return -EOPNOTSUPP; 788 789 err = dsa_port_mrp_add_ring_role(dp, 790 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 791 break; 792 default: 793 err = -EOPNOTSUPP; 794 break; 795 } 796 797 return err; 798 } 799 800 static int dsa_user_vlan_del(struct net_device *dev, 801 const struct switchdev_obj *obj) 802 { 803 struct dsa_port *dp = dsa_user_to_port(dev); 804 struct switchdev_obj_port_vlan *vlan; 805 806 if (dsa_port_skip_vlan_configuration(dp)) 807 return 0; 808 809 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 810 811 return dsa_port_vlan_del(dp, vlan); 812 } 813 814 static int dsa_user_host_vlan_del(struct net_device *dev, 815 const struct switchdev_obj *obj) 816 { 817 struct dsa_port *dp = dsa_user_to_port(dev); 818 struct switchdev_obj_port_vlan *vlan; 819 820 /* Do nothing if this is a software bridge */ 821 if (!dp->bridge) 822 return -EOPNOTSUPP; 823 824 if (dsa_port_skip_vlan_configuration(dp)) 825 return 0; 826 827 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 828 829 return dsa_port_host_vlan_del(dp, vlan); 830 } 831 832 static int dsa_user_port_obj_del(struct net_device *dev, const void *ctx, 833 const struct switchdev_obj *obj) 834 { 835 struct dsa_port *dp = dsa_user_to_port(dev); 836 int err; 837 838 if (ctx && ctx != dp) 839 return 0; 840 841 switch (obj->id) { 842 case SWITCHDEV_OBJ_ID_PORT_MDB: 843 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 844 return -EOPNOTSUPP; 845 846 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 847 break; 848 case SWITCHDEV_OBJ_ID_HOST_MDB: 849 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 850 return -EOPNOTSUPP; 851 852 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 853 break; 854 case SWITCHDEV_OBJ_ID_PORT_VLAN: 855 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 856 err = dsa_user_vlan_del(dev, obj); 857 else 858 err = dsa_user_host_vlan_del(dev, obj); 859 break; 860 case SWITCHDEV_OBJ_ID_MRP: 861 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 862 return -EOPNOTSUPP; 863 864 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 865 break; 866 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 867 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 868 return -EOPNOTSUPP; 869 870 err = dsa_port_mrp_del_ring_role(dp, 871 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 872 break; 873 default: 874 err = -EOPNOTSUPP; 875 break; 876 } 877 878 return err; 879 } 880 881 static netdev_tx_t dsa_user_netpoll_send_skb(struct net_device *dev, 882 struct sk_buff *skb) 883 { 884 #ifdef CONFIG_NET_POLL_CONTROLLER 885 struct dsa_user_priv *p = netdev_priv(dev); 886 887 return netpoll_send_skb(p->netpoll, skb); 888 #else 889 BUG(); 890 return NETDEV_TX_OK; 891 #endif 892 } 893 894 static void dsa_skb_tx_timestamp(struct dsa_user_priv *p, 895 struct sk_buff *skb) 896 { 897 struct dsa_switch *ds = p->dp->ds; 898 899 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 900 return; 901 902 if (!ds->ops->port_txtstamp) 903 return; 904 905 ds->ops->port_txtstamp(ds, p->dp->index, skb); 906 } 907 908 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 909 { 910 /* SKB for netpoll still need to be mangled with the protocol-specific 911 * tag to be successfully transmitted 912 */ 913 if (unlikely(netpoll_tx_running(dev))) 914 return dsa_user_netpoll_send_skb(dev, skb); 915 916 /* Queue the SKB for transmission on the parent interface, but 917 * do not modify its EtherType 918 */ 919 skb->dev = dsa_user_to_conduit(dev); 920 dev_queue_xmit(skb); 921 922 return NETDEV_TX_OK; 923 } 924 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 925 926 static netdev_tx_t dsa_user_xmit(struct sk_buff *skb, struct net_device *dev) 927 { 928 struct dsa_user_priv *p = netdev_priv(dev); 929 struct sk_buff *nskb; 930 931 dev_sw_netstats_tx_add(dev, 1, skb->len); 932 933 memset(skb->cb, 0, sizeof(skb->cb)); 934 935 /* Handle tx timestamp if any */ 936 dsa_skb_tx_timestamp(p, skb); 937 938 if (skb_ensure_writable_head_tail(skb, dev)) { 939 dev_kfree_skb_any(skb); 940 return NETDEV_TX_OK; 941 } 942 943 /* needed_tailroom should still be 'warm' in the cache line from 944 * skb_ensure_writable_head_tail(), which has also ensured that 945 * padding is safe. 946 */ 947 if (dev->needed_tailroom) 948 eth_skb_pad(skb); 949 950 /* Transmit function may have to reallocate the original SKB, 951 * in which case it must have freed it. Only free it here on error. 952 */ 953 nskb = p->xmit(skb, dev); 954 if (!nskb) { 955 kfree_skb(skb); 956 return NETDEV_TX_OK; 957 } 958 959 return dsa_enqueue_skb(nskb, dev); 960 } 961 962 /* ethtool operations *******************************************************/ 963 964 static void dsa_user_get_drvinfo(struct net_device *dev, 965 struct ethtool_drvinfo *drvinfo) 966 { 967 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 968 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 969 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 970 } 971 972 static int dsa_user_get_regs_len(struct net_device *dev) 973 { 974 struct dsa_port *dp = dsa_user_to_port(dev); 975 struct dsa_switch *ds = dp->ds; 976 977 if (ds->ops->get_regs_len) 978 return ds->ops->get_regs_len(ds, dp->index); 979 980 return -EOPNOTSUPP; 981 } 982 983 static void 984 dsa_user_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 985 { 986 struct dsa_port *dp = dsa_user_to_port(dev); 987 struct dsa_switch *ds = dp->ds; 988 989 if (ds->ops->get_regs) 990 ds->ops->get_regs(ds, dp->index, regs, _p); 991 } 992 993 static int dsa_user_nway_reset(struct net_device *dev) 994 { 995 struct dsa_port *dp = dsa_user_to_port(dev); 996 997 return phylink_ethtool_nway_reset(dp->pl); 998 } 999 1000 static int dsa_user_get_eeprom_len(struct net_device *dev) 1001 { 1002 struct dsa_port *dp = dsa_user_to_port(dev); 1003 struct dsa_switch *ds = dp->ds; 1004 1005 if (ds->cd && ds->cd->eeprom_len) 1006 return ds->cd->eeprom_len; 1007 1008 if (ds->ops->get_eeprom_len) 1009 return ds->ops->get_eeprom_len(ds); 1010 1011 return 0; 1012 } 1013 1014 static int dsa_user_get_eeprom(struct net_device *dev, 1015 struct ethtool_eeprom *eeprom, u8 *data) 1016 { 1017 struct dsa_port *dp = dsa_user_to_port(dev); 1018 struct dsa_switch *ds = dp->ds; 1019 1020 if (ds->ops->get_eeprom) 1021 return ds->ops->get_eeprom(ds, eeprom, data); 1022 1023 return -EOPNOTSUPP; 1024 } 1025 1026 static int dsa_user_set_eeprom(struct net_device *dev, 1027 struct ethtool_eeprom *eeprom, u8 *data) 1028 { 1029 struct dsa_port *dp = dsa_user_to_port(dev); 1030 struct dsa_switch *ds = dp->ds; 1031 1032 if (ds->ops->set_eeprom) 1033 return ds->ops->set_eeprom(ds, eeprom, data); 1034 1035 return -EOPNOTSUPP; 1036 } 1037 1038 static void dsa_user_get_strings(struct net_device *dev, 1039 uint32_t stringset, uint8_t *data) 1040 { 1041 struct dsa_port *dp = dsa_user_to_port(dev); 1042 struct dsa_switch *ds = dp->ds; 1043 1044 if (stringset == ETH_SS_STATS) { 1045 int len = ETH_GSTRING_LEN; 1046 1047 strscpy_pad(data, "tx_packets", len); 1048 strscpy_pad(data + len, "tx_bytes", len); 1049 strscpy_pad(data + 2 * len, "rx_packets", len); 1050 strscpy_pad(data + 3 * len, "rx_bytes", len); 1051 if (ds->ops->get_strings) 1052 ds->ops->get_strings(ds, dp->index, stringset, 1053 data + 4 * len); 1054 } else if (stringset == ETH_SS_TEST) { 1055 net_selftest_get_strings(data); 1056 } 1057 1058 } 1059 1060 static void dsa_user_get_ethtool_stats(struct net_device *dev, 1061 struct ethtool_stats *stats, 1062 uint64_t *data) 1063 { 1064 struct dsa_port *dp = dsa_user_to_port(dev); 1065 struct dsa_switch *ds = dp->ds; 1066 struct pcpu_sw_netstats *s; 1067 unsigned int start; 1068 int i; 1069 1070 for_each_possible_cpu(i) { 1071 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 1072 1073 s = per_cpu_ptr(dev->tstats, i); 1074 do { 1075 start = u64_stats_fetch_begin(&s->syncp); 1076 tx_packets = u64_stats_read(&s->tx_packets); 1077 tx_bytes = u64_stats_read(&s->tx_bytes); 1078 rx_packets = u64_stats_read(&s->rx_packets); 1079 rx_bytes = u64_stats_read(&s->rx_bytes); 1080 } while (u64_stats_fetch_retry(&s->syncp, start)); 1081 data[0] += tx_packets; 1082 data[1] += tx_bytes; 1083 data[2] += rx_packets; 1084 data[3] += rx_bytes; 1085 } 1086 if (ds->ops->get_ethtool_stats) 1087 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 1088 } 1089 1090 static int dsa_user_get_sset_count(struct net_device *dev, int sset) 1091 { 1092 struct dsa_port *dp = dsa_user_to_port(dev); 1093 struct dsa_switch *ds = dp->ds; 1094 1095 if (sset == ETH_SS_STATS) { 1096 int count = 0; 1097 1098 if (ds->ops->get_sset_count) { 1099 count = ds->ops->get_sset_count(ds, dp->index, sset); 1100 if (count < 0) 1101 return count; 1102 } 1103 1104 return count + 4; 1105 } else if (sset == ETH_SS_TEST) { 1106 return net_selftest_get_count(); 1107 } 1108 1109 return -EOPNOTSUPP; 1110 } 1111 1112 static void dsa_user_get_eth_phy_stats(struct net_device *dev, 1113 struct ethtool_eth_phy_stats *phy_stats) 1114 { 1115 struct dsa_port *dp = dsa_user_to_port(dev); 1116 struct dsa_switch *ds = dp->ds; 1117 1118 if (ds->ops->get_eth_phy_stats) 1119 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats); 1120 } 1121 1122 static void dsa_user_get_eth_mac_stats(struct net_device *dev, 1123 struct ethtool_eth_mac_stats *mac_stats) 1124 { 1125 struct dsa_port *dp = dsa_user_to_port(dev); 1126 struct dsa_switch *ds = dp->ds; 1127 1128 if (ds->ops->get_eth_mac_stats) 1129 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats); 1130 } 1131 1132 static void 1133 dsa_user_get_eth_ctrl_stats(struct net_device *dev, 1134 struct ethtool_eth_ctrl_stats *ctrl_stats) 1135 { 1136 struct dsa_port *dp = dsa_user_to_port(dev); 1137 struct dsa_switch *ds = dp->ds; 1138 1139 if (ds->ops->get_eth_ctrl_stats) 1140 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats); 1141 } 1142 1143 static void 1144 dsa_user_get_rmon_stats(struct net_device *dev, 1145 struct ethtool_rmon_stats *rmon_stats, 1146 const struct ethtool_rmon_hist_range **ranges) 1147 { 1148 struct dsa_port *dp = dsa_user_to_port(dev); 1149 struct dsa_switch *ds = dp->ds; 1150 1151 if (ds->ops->get_rmon_stats) 1152 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges); 1153 } 1154 1155 static void dsa_user_net_selftest(struct net_device *ndev, 1156 struct ethtool_test *etest, u64 *buf) 1157 { 1158 struct dsa_port *dp = dsa_user_to_port(ndev); 1159 struct dsa_switch *ds = dp->ds; 1160 1161 if (ds->ops->self_test) { 1162 ds->ops->self_test(ds, dp->index, etest, buf); 1163 return; 1164 } 1165 1166 net_selftest(ndev, etest, buf); 1167 } 1168 1169 static int dsa_user_get_mm(struct net_device *dev, 1170 struct ethtool_mm_state *state) 1171 { 1172 struct dsa_port *dp = dsa_user_to_port(dev); 1173 struct dsa_switch *ds = dp->ds; 1174 1175 if (!ds->ops->get_mm) 1176 return -EOPNOTSUPP; 1177 1178 return ds->ops->get_mm(ds, dp->index, state); 1179 } 1180 1181 static int dsa_user_set_mm(struct net_device *dev, struct ethtool_mm_cfg *cfg, 1182 struct netlink_ext_ack *extack) 1183 { 1184 struct dsa_port *dp = dsa_user_to_port(dev); 1185 struct dsa_switch *ds = dp->ds; 1186 1187 if (!ds->ops->set_mm) 1188 return -EOPNOTSUPP; 1189 1190 return ds->ops->set_mm(ds, dp->index, cfg, extack); 1191 } 1192 1193 static void dsa_user_get_mm_stats(struct net_device *dev, 1194 struct ethtool_mm_stats *stats) 1195 { 1196 struct dsa_port *dp = dsa_user_to_port(dev); 1197 struct dsa_switch *ds = dp->ds; 1198 1199 if (ds->ops->get_mm_stats) 1200 ds->ops->get_mm_stats(ds, dp->index, stats); 1201 } 1202 1203 static void dsa_user_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1204 { 1205 struct dsa_port *dp = dsa_user_to_port(dev); 1206 struct dsa_switch *ds = dp->ds; 1207 1208 phylink_ethtool_get_wol(dp->pl, w); 1209 1210 if (ds->ops->get_wol) 1211 ds->ops->get_wol(ds, dp->index, w); 1212 } 1213 1214 static int dsa_user_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1215 { 1216 struct dsa_port *dp = dsa_user_to_port(dev); 1217 struct dsa_switch *ds = dp->ds; 1218 int ret = -EOPNOTSUPP; 1219 1220 phylink_ethtool_set_wol(dp->pl, w); 1221 1222 if (ds->ops->set_wol) 1223 ret = ds->ops->set_wol(ds, dp->index, w); 1224 1225 return ret; 1226 } 1227 1228 static int dsa_user_set_eee(struct net_device *dev, struct ethtool_keee *e) 1229 { 1230 struct dsa_port *dp = dsa_user_to_port(dev); 1231 struct dsa_switch *ds = dp->ds; 1232 int ret; 1233 1234 /* Port's PHY and MAC both need to be EEE capable */ 1235 if (!dev->phydev || !dp->pl) 1236 return -ENODEV; 1237 1238 if (!ds->ops->set_mac_eee) 1239 return -EOPNOTSUPP; 1240 1241 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1242 if (ret) 1243 return ret; 1244 1245 return phylink_ethtool_set_eee(dp->pl, e); 1246 } 1247 1248 static int dsa_user_get_eee(struct net_device *dev, struct ethtool_keee *e) 1249 { 1250 struct dsa_port *dp = dsa_user_to_port(dev); 1251 struct dsa_switch *ds = dp->ds; 1252 int ret; 1253 1254 /* Port's PHY and MAC both need to be EEE capable */ 1255 if (!dev->phydev || !dp->pl) 1256 return -ENODEV; 1257 1258 if (!ds->ops->get_mac_eee) 1259 return -EOPNOTSUPP; 1260 1261 ret = ds->ops->get_mac_eee(ds, dp->index, e); 1262 if (ret) 1263 return ret; 1264 1265 return phylink_ethtool_get_eee(dp->pl, e); 1266 } 1267 1268 static int dsa_user_get_link_ksettings(struct net_device *dev, 1269 struct ethtool_link_ksettings *cmd) 1270 { 1271 struct dsa_port *dp = dsa_user_to_port(dev); 1272 1273 return phylink_ethtool_ksettings_get(dp->pl, cmd); 1274 } 1275 1276 static int dsa_user_set_link_ksettings(struct net_device *dev, 1277 const struct ethtool_link_ksettings *cmd) 1278 { 1279 struct dsa_port *dp = dsa_user_to_port(dev); 1280 1281 return phylink_ethtool_ksettings_set(dp->pl, cmd); 1282 } 1283 1284 static void dsa_user_get_pause_stats(struct net_device *dev, 1285 struct ethtool_pause_stats *pause_stats) 1286 { 1287 struct dsa_port *dp = dsa_user_to_port(dev); 1288 struct dsa_switch *ds = dp->ds; 1289 1290 if (ds->ops->get_pause_stats) 1291 ds->ops->get_pause_stats(ds, dp->index, pause_stats); 1292 } 1293 1294 static void dsa_user_get_pauseparam(struct net_device *dev, 1295 struct ethtool_pauseparam *pause) 1296 { 1297 struct dsa_port *dp = dsa_user_to_port(dev); 1298 1299 phylink_ethtool_get_pauseparam(dp->pl, pause); 1300 } 1301 1302 static int dsa_user_set_pauseparam(struct net_device *dev, 1303 struct ethtool_pauseparam *pause) 1304 { 1305 struct dsa_port *dp = dsa_user_to_port(dev); 1306 1307 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1308 } 1309 1310 #ifdef CONFIG_NET_POLL_CONTROLLER 1311 static int dsa_user_netpoll_setup(struct net_device *dev) 1312 { 1313 struct net_device *conduit = dsa_user_to_conduit(dev); 1314 struct dsa_user_priv *p = netdev_priv(dev); 1315 struct netpoll *netpoll; 1316 int err = 0; 1317 1318 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1319 if (!netpoll) 1320 return -ENOMEM; 1321 1322 err = __netpoll_setup(netpoll, conduit); 1323 if (err) { 1324 kfree(netpoll); 1325 goto out; 1326 } 1327 1328 p->netpoll = netpoll; 1329 out: 1330 return err; 1331 } 1332 1333 static void dsa_user_netpoll_cleanup(struct net_device *dev) 1334 { 1335 struct dsa_user_priv *p = netdev_priv(dev); 1336 struct netpoll *netpoll = p->netpoll; 1337 1338 if (!netpoll) 1339 return; 1340 1341 p->netpoll = NULL; 1342 1343 __netpoll_free(netpoll); 1344 } 1345 1346 static void dsa_user_poll_controller(struct net_device *dev) 1347 { 1348 } 1349 #endif 1350 1351 static struct dsa_mall_tc_entry * 1352 dsa_user_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1353 { 1354 struct dsa_user_priv *p = netdev_priv(dev); 1355 struct dsa_mall_tc_entry *mall_tc_entry; 1356 1357 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1358 if (mall_tc_entry->cookie == cookie) 1359 return mall_tc_entry; 1360 1361 return NULL; 1362 } 1363 1364 static int 1365 dsa_user_add_cls_matchall_mirred(struct net_device *dev, 1366 struct tc_cls_matchall_offload *cls, 1367 bool ingress) 1368 { 1369 struct netlink_ext_ack *extack = cls->common.extack; 1370 struct dsa_port *dp = dsa_user_to_port(dev); 1371 struct dsa_user_priv *p = netdev_priv(dev); 1372 struct dsa_mall_mirror_tc_entry *mirror; 1373 struct dsa_mall_tc_entry *mall_tc_entry; 1374 struct dsa_switch *ds = dp->ds; 1375 struct flow_action_entry *act; 1376 struct dsa_port *to_dp; 1377 int err; 1378 1379 if (cls->common.protocol != htons(ETH_P_ALL)) 1380 return -EOPNOTSUPP; 1381 1382 if (!ds->ops->port_mirror_add) 1383 return -EOPNOTSUPP; 1384 1385 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1386 cls->common.extack)) 1387 return -EOPNOTSUPP; 1388 1389 act = &cls->rule->action.entries[0]; 1390 1391 if (!act->dev) 1392 return -EINVAL; 1393 1394 if (!dsa_user_dev_check(act->dev)) 1395 return -EOPNOTSUPP; 1396 1397 to_dp = dsa_user_to_port(act->dev); 1398 1399 if (dp->ds != to_dp->ds) { 1400 NL_SET_ERR_MSG_MOD(extack, 1401 "Cross-chip mirroring not implemented"); 1402 return -EOPNOTSUPP; 1403 } 1404 1405 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1406 if (!mall_tc_entry) 1407 return -ENOMEM; 1408 1409 mall_tc_entry->cookie = cls->cookie; 1410 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1411 mirror = &mall_tc_entry->mirror; 1412 mirror->to_local_port = to_dp->index; 1413 mirror->ingress = ingress; 1414 1415 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1416 if (err) { 1417 kfree(mall_tc_entry); 1418 return err; 1419 } 1420 1421 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1422 1423 return err; 1424 } 1425 1426 static int 1427 dsa_user_add_cls_matchall_police(struct net_device *dev, 1428 struct tc_cls_matchall_offload *cls, 1429 bool ingress) 1430 { 1431 struct netlink_ext_ack *extack = cls->common.extack; 1432 struct dsa_port *dp = dsa_user_to_port(dev); 1433 struct dsa_user_priv *p = netdev_priv(dev); 1434 struct dsa_mall_policer_tc_entry *policer; 1435 struct dsa_mall_tc_entry *mall_tc_entry; 1436 struct dsa_switch *ds = dp->ds; 1437 struct flow_action_entry *act; 1438 int err; 1439 1440 if (!ds->ops->port_policer_add) { 1441 NL_SET_ERR_MSG_MOD(extack, 1442 "Policing offload not implemented"); 1443 return -EOPNOTSUPP; 1444 } 1445 1446 if (!ingress) { 1447 NL_SET_ERR_MSG_MOD(extack, 1448 "Only supported on ingress qdisc"); 1449 return -EOPNOTSUPP; 1450 } 1451 1452 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1453 cls->common.extack)) 1454 return -EOPNOTSUPP; 1455 1456 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1457 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1458 NL_SET_ERR_MSG_MOD(extack, 1459 "Only one port policer allowed"); 1460 return -EEXIST; 1461 } 1462 } 1463 1464 act = &cls->rule->action.entries[0]; 1465 1466 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1467 if (!mall_tc_entry) 1468 return -ENOMEM; 1469 1470 mall_tc_entry->cookie = cls->cookie; 1471 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1472 policer = &mall_tc_entry->policer; 1473 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1474 policer->burst = act->police.burst; 1475 1476 err = ds->ops->port_policer_add(ds, dp->index, policer); 1477 if (err) { 1478 kfree(mall_tc_entry); 1479 return err; 1480 } 1481 1482 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1483 1484 return err; 1485 } 1486 1487 static int dsa_user_add_cls_matchall(struct net_device *dev, 1488 struct tc_cls_matchall_offload *cls, 1489 bool ingress) 1490 { 1491 const struct flow_action *action = &cls->rule->action; 1492 1493 if (!flow_offload_has_one_action(action)) 1494 return -EOPNOTSUPP; 1495 1496 switch (action->entries[0].id) { 1497 case FLOW_ACTION_MIRRED: 1498 return dsa_user_add_cls_matchall_mirred(dev, cls, ingress); 1499 case FLOW_ACTION_POLICE: 1500 return dsa_user_add_cls_matchall_police(dev, cls, ingress); 1501 default: 1502 break; 1503 } 1504 1505 return -EOPNOTSUPP; 1506 } 1507 1508 static void dsa_user_del_cls_matchall(struct net_device *dev, 1509 struct tc_cls_matchall_offload *cls) 1510 { 1511 struct dsa_port *dp = dsa_user_to_port(dev); 1512 struct dsa_mall_tc_entry *mall_tc_entry; 1513 struct dsa_switch *ds = dp->ds; 1514 1515 mall_tc_entry = dsa_user_mall_tc_entry_find(dev, cls->cookie); 1516 if (!mall_tc_entry) 1517 return; 1518 1519 list_del(&mall_tc_entry->list); 1520 1521 switch (mall_tc_entry->type) { 1522 case DSA_PORT_MALL_MIRROR: 1523 if (ds->ops->port_mirror_del) 1524 ds->ops->port_mirror_del(ds, dp->index, 1525 &mall_tc_entry->mirror); 1526 break; 1527 case DSA_PORT_MALL_POLICER: 1528 if (ds->ops->port_policer_del) 1529 ds->ops->port_policer_del(ds, dp->index); 1530 break; 1531 default: 1532 WARN_ON(1); 1533 } 1534 1535 kfree(mall_tc_entry); 1536 } 1537 1538 static int dsa_user_setup_tc_cls_matchall(struct net_device *dev, 1539 struct tc_cls_matchall_offload *cls, 1540 bool ingress) 1541 { 1542 if (cls->common.chain_index) 1543 return -EOPNOTSUPP; 1544 1545 switch (cls->command) { 1546 case TC_CLSMATCHALL_REPLACE: 1547 return dsa_user_add_cls_matchall(dev, cls, ingress); 1548 case TC_CLSMATCHALL_DESTROY: 1549 dsa_user_del_cls_matchall(dev, cls); 1550 return 0; 1551 default: 1552 return -EOPNOTSUPP; 1553 } 1554 } 1555 1556 static int dsa_user_add_cls_flower(struct net_device *dev, 1557 struct flow_cls_offload *cls, 1558 bool ingress) 1559 { 1560 struct dsa_port *dp = dsa_user_to_port(dev); 1561 struct dsa_switch *ds = dp->ds; 1562 int port = dp->index; 1563 1564 if (!ds->ops->cls_flower_add) 1565 return -EOPNOTSUPP; 1566 1567 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1568 } 1569 1570 static int dsa_user_del_cls_flower(struct net_device *dev, 1571 struct flow_cls_offload *cls, 1572 bool ingress) 1573 { 1574 struct dsa_port *dp = dsa_user_to_port(dev); 1575 struct dsa_switch *ds = dp->ds; 1576 int port = dp->index; 1577 1578 if (!ds->ops->cls_flower_del) 1579 return -EOPNOTSUPP; 1580 1581 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1582 } 1583 1584 static int dsa_user_stats_cls_flower(struct net_device *dev, 1585 struct flow_cls_offload *cls, 1586 bool ingress) 1587 { 1588 struct dsa_port *dp = dsa_user_to_port(dev); 1589 struct dsa_switch *ds = dp->ds; 1590 int port = dp->index; 1591 1592 if (!ds->ops->cls_flower_stats) 1593 return -EOPNOTSUPP; 1594 1595 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1596 } 1597 1598 static int dsa_user_setup_tc_cls_flower(struct net_device *dev, 1599 struct flow_cls_offload *cls, 1600 bool ingress) 1601 { 1602 switch (cls->command) { 1603 case FLOW_CLS_REPLACE: 1604 return dsa_user_add_cls_flower(dev, cls, ingress); 1605 case FLOW_CLS_DESTROY: 1606 return dsa_user_del_cls_flower(dev, cls, ingress); 1607 case FLOW_CLS_STATS: 1608 return dsa_user_stats_cls_flower(dev, cls, ingress); 1609 default: 1610 return -EOPNOTSUPP; 1611 } 1612 } 1613 1614 static int dsa_user_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1615 void *cb_priv, bool ingress) 1616 { 1617 struct net_device *dev = cb_priv; 1618 1619 if (!tc_can_offload(dev)) 1620 return -EOPNOTSUPP; 1621 1622 switch (type) { 1623 case TC_SETUP_CLSMATCHALL: 1624 return dsa_user_setup_tc_cls_matchall(dev, type_data, ingress); 1625 case TC_SETUP_CLSFLOWER: 1626 return dsa_user_setup_tc_cls_flower(dev, type_data, ingress); 1627 default: 1628 return -EOPNOTSUPP; 1629 } 1630 } 1631 1632 static int dsa_user_setup_tc_block_cb_ig(enum tc_setup_type type, 1633 void *type_data, void *cb_priv) 1634 { 1635 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, true); 1636 } 1637 1638 static int dsa_user_setup_tc_block_cb_eg(enum tc_setup_type type, 1639 void *type_data, void *cb_priv) 1640 { 1641 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, false); 1642 } 1643 1644 static LIST_HEAD(dsa_user_block_cb_list); 1645 1646 static int dsa_user_setup_tc_block(struct net_device *dev, 1647 struct flow_block_offload *f) 1648 { 1649 struct flow_block_cb *block_cb; 1650 flow_setup_cb_t *cb; 1651 1652 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1653 cb = dsa_user_setup_tc_block_cb_ig; 1654 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1655 cb = dsa_user_setup_tc_block_cb_eg; 1656 else 1657 return -EOPNOTSUPP; 1658 1659 f->driver_block_list = &dsa_user_block_cb_list; 1660 1661 switch (f->command) { 1662 case FLOW_BLOCK_BIND: 1663 if (flow_block_cb_is_busy(cb, dev, &dsa_user_block_cb_list)) 1664 return -EBUSY; 1665 1666 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1667 if (IS_ERR(block_cb)) 1668 return PTR_ERR(block_cb); 1669 1670 flow_block_cb_add(block_cb, f); 1671 list_add_tail(&block_cb->driver_list, &dsa_user_block_cb_list); 1672 return 0; 1673 case FLOW_BLOCK_UNBIND: 1674 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1675 if (!block_cb) 1676 return -ENOENT; 1677 1678 flow_block_cb_remove(block_cb, f); 1679 list_del(&block_cb->driver_list); 1680 return 0; 1681 default: 1682 return -EOPNOTSUPP; 1683 } 1684 } 1685 1686 static int dsa_user_setup_ft_block(struct dsa_switch *ds, int port, 1687 void *type_data) 1688 { 1689 struct net_device *conduit = dsa_port_to_conduit(dsa_to_port(ds, port)); 1690 1691 if (!conduit->netdev_ops->ndo_setup_tc) 1692 return -EOPNOTSUPP; 1693 1694 return conduit->netdev_ops->ndo_setup_tc(conduit, TC_SETUP_FT, type_data); 1695 } 1696 1697 static int dsa_user_setup_tc(struct net_device *dev, enum tc_setup_type type, 1698 void *type_data) 1699 { 1700 struct dsa_port *dp = dsa_user_to_port(dev); 1701 struct dsa_switch *ds = dp->ds; 1702 1703 switch (type) { 1704 case TC_SETUP_BLOCK: 1705 return dsa_user_setup_tc_block(dev, type_data); 1706 case TC_SETUP_FT: 1707 return dsa_user_setup_ft_block(ds, dp->index, type_data); 1708 default: 1709 break; 1710 } 1711 1712 if (!ds->ops->port_setup_tc) 1713 return -EOPNOTSUPP; 1714 1715 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1716 } 1717 1718 static int dsa_user_get_rxnfc(struct net_device *dev, 1719 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1720 { 1721 struct dsa_port *dp = dsa_user_to_port(dev); 1722 struct dsa_switch *ds = dp->ds; 1723 1724 if (!ds->ops->get_rxnfc) 1725 return -EOPNOTSUPP; 1726 1727 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1728 } 1729 1730 static int dsa_user_set_rxnfc(struct net_device *dev, 1731 struct ethtool_rxnfc *nfc) 1732 { 1733 struct dsa_port *dp = dsa_user_to_port(dev); 1734 struct dsa_switch *ds = dp->ds; 1735 1736 if (!ds->ops->set_rxnfc) 1737 return -EOPNOTSUPP; 1738 1739 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1740 } 1741 1742 static int dsa_user_get_ts_info(struct net_device *dev, 1743 struct kernel_ethtool_ts_info *ts) 1744 { 1745 struct dsa_user_priv *p = netdev_priv(dev); 1746 struct dsa_switch *ds = p->dp->ds; 1747 1748 if (!ds->ops->get_ts_info) 1749 return -EOPNOTSUPP; 1750 1751 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1752 } 1753 1754 static int dsa_user_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1755 u16 vid) 1756 { 1757 struct dsa_port *dp = dsa_user_to_port(dev); 1758 struct switchdev_obj_port_vlan vlan = { 1759 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1760 .vid = vid, 1761 /* This API only allows programming tagged, non-PVID VIDs */ 1762 .flags = 0, 1763 }; 1764 struct netlink_ext_ack extack = {0}; 1765 struct dsa_switch *ds = dp->ds; 1766 struct netdev_hw_addr *ha; 1767 struct dsa_vlan *v; 1768 int ret; 1769 1770 /* User port... */ 1771 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1772 if (ret) { 1773 if (extack._msg) 1774 netdev_err(dev, "%s\n", extack._msg); 1775 return ret; 1776 } 1777 1778 /* And CPU port... */ 1779 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1780 if (ret) { 1781 if (extack._msg) 1782 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1783 extack._msg); 1784 return ret; 1785 } 1786 1787 if (!dsa_switch_supports_uc_filtering(ds) && 1788 !dsa_switch_supports_mc_filtering(ds)) 1789 return 0; 1790 1791 v = kzalloc(sizeof(*v), GFP_KERNEL); 1792 if (!v) { 1793 ret = -ENOMEM; 1794 goto rollback; 1795 } 1796 1797 netif_addr_lock_bh(dev); 1798 1799 v->vid = vid; 1800 list_add_tail(&v->list, &dp->user_vlans); 1801 1802 if (dsa_switch_supports_mc_filtering(ds)) { 1803 netdev_for_each_synced_mc_addr(ha, dev) { 1804 dsa_user_schedule_standalone_work(dev, DSA_MC_ADD, 1805 ha->addr, vid); 1806 } 1807 } 1808 1809 if (dsa_switch_supports_uc_filtering(ds)) { 1810 netdev_for_each_synced_uc_addr(ha, dev) { 1811 dsa_user_schedule_standalone_work(dev, DSA_UC_ADD, 1812 ha->addr, vid); 1813 } 1814 } 1815 1816 netif_addr_unlock_bh(dev); 1817 1818 dsa_flush_workqueue(); 1819 1820 return 0; 1821 1822 rollback: 1823 dsa_port_host_vlan_del(dp, &vlan); 1824 dsa_port_vlan_del(dp, &vlan); 1825 1826 return ret; 1827 } 1828 1829 static int dsa_user_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1830 u16 vid) 1831 { 1832 struct dsa_port *dp = dsa_user_to_port(dev); 1833 struct switchdev_obj_port_vlan vlan = { 1834 .vid = vid, 1835 /* This API only allows programming tagged, non-PVID VIDs */ 1836 .flags = 0, 1837 }; 1838 struct dsa_switch *ds = dp->ds; 1839 struct netdev_hw_addr *ha; 1840 struct dsa_vlan *v; 1841 int err; 1842 1843 err = dsa_port_vlan_del(dp, &vlan); 1844 if (err) 1845 return err; 1846 1847 err = dsa_port_host_vlan_del(dp, &vlan); 1848 if (err) 1849 return err; 1850 1851 if (!dsa_switch_supports_uc_filtering(ds) && 1852 !dsa_switch_supports_mc_filtering(ds)) 1853 return 0; 1854 1855 netif_addr_lock_bh(dev); 1856 1857 v = dsa_vlan_find(&dp->user_vlans, &vlan); 1858 if (!v) { 1859 netif_addr_unlock_bh(dev); 1860 return -ENOENT; 1861 } 1862 1863 list_del(&v->list); 1864 kfree(v); 1865 1866 if (dsa_switch_supports_mc_filtering(ds)) { 1867 netdev_for_each_synced_mc_addr(ha, dev) { 1868 dsa_user_schedule_standalone_work(dev, DSA_MC_DEL, 1869 ha->addr, vid); 1870 } 1871 } 1872 1873 if (dsa_switch_supports_uc_filtering(ds)) { 1874 netdev_for_each_synced_uc_addr(ha, dev) { 1875 dsa_user_schedule_standalone_work(dev, DSA_UC_DEL, 1876 ha->addr, vid); 1877 } 1878 } 1879 1880 netif_addr_unlock_bh(dev); 1881 1882 dsa_flush_workqueue(); 1883 1884 return 0; 1885 } 1886 1887 static int dsa_user_restore_vlan(struct net_device *vdev, int vid, void *arg) 1888 { 1889 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1890 1891 return dsa_user_vlan_rx_add_vid(arg, proto, vid); 1892 } 1893 1894 static int dsa_user_clear_vlan(struct net_device *vdev, int vid, void *arg) 1895 { 1896 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1897 1898 return dsa_user_vlan_rx_kill_vid(arg, proto, vid); 1899 } 1900 1901 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1902 * filtering is enabled. The baseline is that only ports that offload a 1903 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1904 * but there are exceptions for quirky hardware. 1905 * 1906 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1907 * the same switch with other ports that offload a VLAN-aware bridge are also 1908 * inevitably VLAN-aware. 1909 * 1910 * To summarize, a DSA switch port offloads: 1911 * 1912 * - If standalone (this includes software bridge, software LAG): 1913 * - if ds->needs_standalone_vlan_filtering = true, OR if 1914 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1915 * this switch chip which have vlan_filtering=1) 1916 * - the 8021q upper VLANs 1917 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1918 * global, or it is, but no port is under a VLAN-aware bridge): 1919 * - no VLAN (any 8021q upper is a software VLAN) 1920 * 1921 * - If under a vlan_filtering=0 bridge which it offload: 1922 * - if ds->configure_vlan_while_not_filtering = true (default): 1923 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1924 * - else (deprecated): 1925 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1926 * enabled, so this behavior is broken and discouraged. 1927 * 1928 * - If under a vlan_filtering=1 bridge which it offload: 1929 * - the bridge VLANs 1930 * - the 8021q upper VLANs 1931 */ 1932 int dsa_user_manage_vlan_filtering(struct net_device *user, 1933 bool vlan_filtering) 1934 { 1935 int err; 1936 1937 if (vlan_filtering) { 1938 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1939 1940 err = vlan_for_each(user, dsa_user_restore_vlan, user); 1941 if (err) { 1942 vlan_for_each(user, dsa_user_clear_vlan, user); 1943 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1944 return err; 1945 } 1946 } else { 1947 err = vlan_for_each(user, dsa_user_clear_vlan, user); 1948 if (err) 1949 return err; 1950 1951 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1952 } 1953 1954 return 0; 1955 } 1956 1957 struct dsa_hw_port { 1958 struct list_head list; 1959 struct net_device *dev; 1960 int old_mtu; 1961 }; 1962 1963 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1964 { 1965 const struct dsa_hw_port *p; 1966 int err; 1967 1968 list_for_each_entry(p, hw_port_list, list) { 1969 if (p->dev->mtu == mtu) 1970 continue; 1971 1972 err = dev_set_mtu(p->dev, mtu); 1973 if (err) 1974 goto rollback; 1975 } 1976 1977 return 0; 1978 1979 rollback: 1980 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1981 if (p->dev->mtu == p->old_mtu) 1982 continue; 1983 1984 if (dev_set_mtu(p->dev, p->old_mtu)) 1985 netdev_err(p->dev, "Failed to restore MTU\n"); 1986 } 1987 1988 return err; 1989 } 1990 1991 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1992 { 1993 struct dsa_hw_port *p, *n; 1994 1995 list_for_each_entry_safe(p, n, hw_port_list, list) 1996 kfree(p); 1997 } 1998 1999 /* Make the hardware datapath to/from @dev limited to a common MTU */ 2000 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 2001 { 2002 struct list_head hw_port_list; 2003 struct dsa_switch_tree *dst; 2004 int min_mtu = ETH_MAX_MTU; 2005 struct dsa_port *other_dp; 2006 int err; 2007 2008 if (!dp->ds->mtu_enforcement_ingress) 2009 return; 2010 2011 if (!dp->bridge) 2012 return; 2013 2014 INIT_LIST_HEAD(&hw_port_list); 2015 2016 /* Populate the list of ports that are part of the same bridge 2017 * as the newly added/modified port 2018 */ 2019 list_for_each_entry(dst, &dsa_tree_list, list) { 2020 list_for_each_entry(other_dp, &dst->ports, list) { 2021 struct dsa_hw_port *hw_port; 2022 struct net_device *user; 2023 2024 if (other_dp->type != DSA_PORT_TYPE_USER) 2025 continue; 2026 2027 if (!dsa_port_bridge_same(dp, other_dp)) 2028 continue; 2029 2030 if (!other_dp->ds->mtu_enforcement_ingress) 2031 continue; 2032 2033 user = other_dp->user; 2034 2035 if (min_mtu > user->mtu) 2036 min_mtu = user->mtu; 2037 2038 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 2039 if (!hw_port) 2040 goto out; 2041 2042 hw_port->dev = user; 2043 hw_port->old_mtu = user->mtu; 2044 2045 list_add(&hw_port->list, &hw_port_list); 2046 } 2047 } 2048 2049 /* Attempt to configure the entire hardware bridge to the newly added 2050 * interface's MTU first, regardless of whether the intention of the 2051 * user was to raise or lower it. 2052 */ 2053 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->user->mtu); 2054 if (!err) 2055 goto out; 2056 2057 /* Clearly that didn't work out so well, so just set the minimum MTU on 2058 * all hardware bridge ports now. If this fails too, then all ports will 2059 * still have their old MTU rolled back anyway. 2060 */ 2061 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 2062 2063 out: 2064 dsa_hw_port_list_free(&hw_port_list); 2065 } 2066 2067 int dsa_user_change_mtu(struct net_device *dev, int new_mtu) 2068 { 2069 struct net_device *conduit = dsa_user_to_conduit(dev); 2070 struct dsa_port *dp = dsa_user_to_port(dev); 2071 struct dsa_port *cpu_dp = dp->cpu_dp; 2072 struct dsa_switch *ds = dp->ds; 2073 struct dsa_port *other_dp; 2074 int largest_mtu = 0; 2075 int new_conduit_mtu; 2076 int old_conduit_mtu; 2077 int mtu_limit; 2078 int overhead; 2079 int cpu_mtu; 2080 int err; 2081 2082 if (!ds->ops->port_change_mtu) 2083 return -EOPNOTSUPP; 2084 2085 dsa_tree_for_each_user_port(other_dp, ds->dst) { 2086 int user_mtu; 2087 2088 /* During probe, this function will be called for each user 2089 * device, while not all of them have been allocated. That's 2090 * ok, it doesn't change what the maximum is, so ignore it. 2091 */ 2092 if (!other_dp->user) 2093 continue; 2094 2095 /* Pretend that we already applied the setting, which we 2096 * actually haven't (still haven't done all integrity checks) 2097 */ 2098 if (dp == other_dp) 2099 user_mtu = new_mtu; 2100 else 2101 user_mtu = other_dp->user->mtu; 2102 2103 if (largest_mtu < user_mtu) 2104 largest_mtu = user_mtu; 2105 } 2106 2107 overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops); 2108 mtu_limit = min_t(int, conduit->max_mtu, dev->max_mtu + overhead); 2109 old_conduit_mtu = conduit->mtu; 2110 new_conduit_mtu = largest_mtu + overhead; 2111 if (new_conduit_mtu > mtu_limit) 2112 return -ERANGE; 2113 2114 /* If the conduit MTU isn't over limit, there's no need to check the CPU 2115 * MTU, since that surely isn't either. 2116 */ 2117 cpu_mtu = largest_mtu; 2118 2119 /* Start applying stuff */ 2120 if (new_conduit_mtu != old_conduit_mtu) { 2121 err = dev_set_mtu(conduit, new_conduit_mtu); 2122 if (err < 0) 2123 goto out_conduit_failed; 2124 2125 /* We only need to propagate the MTU of the CPU port to 2126 * upstream switches, so emit a notifier which updates them. 2127 */ 2128 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 2129 if (err) 2130 goto out_cpu_failed; 2131 } 2132 2133 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 2134 if (err) 2135 goto out_port_failed; 2136 2137 WRITE_ONCE(dev->mtu, new_mtu); 2138 2139 dsa_bridge_mtu_normalization(dp); 2140 2141 return 0; 2142 2143 out_port_failed: 2144 if (new_conduit_mtu != old_conduit_mtu) 2145 dsa_port_mtu_change(cpu_dp, old_conduit_mtu - overhead); 2146 out_cpu_failed: 2147 if (new_conduit_mtu != old_conduit_mtu) 2148 dev_set_mtu(conduit, old_conduit_mtu); 2149 out_conduit_failed: 2150 return err; 2151 } 2152 2153 static int __maybe_unused 2154 dsa_user_dcbnl_set_apptrust(struct net_device *dev, u8 *sel, int nsel) 2155 { 2156 struct dsa_port *dp = dsa_user_to_port(dev); 2157 struct dsa_switch *ds = dp->ds; 2158 int port = dp->index; 2159 2160 if (!ds->ops->port_set_apptrust) 2161 return -EOPNOTSUPP; 2162 2163 return ds->ops->port_set_apptrust(ds, port, sel, nsel); 2164 } 2165 2166 static int __maybe_unused 2167 dsa_user_dcbnl_get_apptrust(struct net_device *dev, u8 *sel, int *nsel) 2168 { 2169 struct dsa_port *dp = dsa_user_to_port(dev); 2170 struct dsa_switch *ds = dp->ds; 2171 int port = dp->index; 2172 2173 if (!ds->ops->port_get_apptrust) 2174 return -EOPNOTSUPP; 2175 2176 return ds->ops->port_get_apptrust(ds, port, sel, nsel); 2177 } 2178 2179 static int __maybe_unused 2180 dsa_user_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 2181 { 2182 struct dsa_port *dp = dsa_user_to_port(dev); 2183 struct dsa_switch *ds = dp->ds; 2184 unsigned long mask, new_prio; 2185 int err, port = dp->index; 2186 2187 if (!ds->ops->port_set_default_prio) 2188 return -EOPNOTSUPP; 2189 2190 err = dcb_ieee_setapp(dev, app); 2191 if (err) 2192 return err; 2193 2194 mask = dcb_ieee_getapp_mask(dev, app); 2195 new_prio = __fls(mask); 2196 2197 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2198 if (err) { 2199 dcb_ieee_delapp(dev, app); 2200 return err; 2201 } 2202 2203 return 0; 2204 } 2205 2206 /* Update the DSCP prio entries on all user ports of the switch in case 2207 * the switch supports global DSCP prio instead of per port DSCP prios. 2208 */ 2209 static int dsa_user_dcbnl_ieee_global_dscp_setdel(struct net_device *dev, 2210 struct dcb_app *app, bool del) 2211 { 2212 int (*setdel)(struct net_device *dev, struct dcb_app *app); 2213 struct dsa_port *dp = dsa_user_to_port(dev); 2214 struct dsa_switch *ds = dp->ds; 2215 struct dsa_port *other_dp; 2216 int err, restore_err; 2217 2218 if (del) 2219 setdel = dcb_ieee_delapp; 2220 else 2221 setdel = dcb_ieee_setapp; 2222 2223 dsa_switch_for_each_user_port(other_dp, ds) { 2224 struct net_device *user = other_dp->user; 2225 2226 if (!user || user == dev) 2227 continue; 2228 2229 err = setdel(user, app); 2230 if (err) 2231 goto err_try_to_restore; 2232 } 2233 2234 return 0; 2235 2236 err_try_to_restore: 2237 2238 /* Revert logic to restore previous state of app entries */ 2239 if (!del) 2240 setdel = dcb_ieee_delapp; 2241 else 2242 setdel = dcb_ieee_setapp; 2243 2244 dsa_switch_for_each_user_port_continue_reverse(other_dp, ds) { 2245 struct net_device *user = other_dp->user; 2246 2247 if (!user || user == dev) 2248 continue; 2249 2250 restore_err = setdel(user, app); 2251 if (restore_err) 2252 netdev_err(user, "Failed to restore DSCP prio entry configuration\n"); 2253 } 2254 2255 return err; 2256 } 2257 2258 static int __maybe_unused 2259 dsa_user_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 2260 { 2261 struct dsa_port *dp = dsa_user_to_port(dev); 2262 struct dsa_switch *ds = dp->ds; 2263 unsigned long mask, new_prio; 2264 int err, port = dp->index; 2265 u8 dscp = app->protocol; 2266 2267 if (!ds->ops->port_add_dscp_prio) 2268 return -EOPNOTSUPP; 2269 2270 if (dscp >= 64) { 2271 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 2272 dscp); 2273 return -EINVAL; 2274 } 2275 2276 err = dcb_ieee_setapp(dev, app); 2277 if (err) 2278 return err; 2279 2280 mask = dcb_ieee_getapp_mask(dev, app); 2281 new_prio = __fls(mask); 2282 2283 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 2284 if (err) { 2285 dcb_ieee_delapp(dev, app); 2286 return err; 2287 } 2288 2289 if (!ds->dscp_prio_mapping_is_global) 2290 return 0; 2291 2292 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, false); 2293 if (err) { 2294 if (ds->ops->port_del_dscp_prio) 2295 ds->ops->port_del_dscp_prio(ds, port, dscp, new_prio); 2296 dcb_ieee_delapp(dev, app); 2297 return err; 2298 } 2299 2300 return 0; 2301 } 2302 2303 static int __maybe_unused dsa_user_dcbnl_ieee_setapp(struct net_device *dev, 2304 struct dcb_app *app) 2305 { 2306 switch (app->selector) { 2307 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2308 switch (app->protocol) { 2309 case 0: 2310 return dsa_user_dcbnl_set_default_prio(dev, app); 2311 default: 2312 return -EOPNOTSUPP; 2313 } 2314 break; 2315 case IEEE_8021QAZ_APP_SEL_DSCP: 2316 return dsa_user_dcbnl_add_dscp_prio(dev, app); 2317 default: 2318 return -EOPNOTSUPP; 2319 } 2320 } 2321 2322 static int __maybe_unused 2323 dsa_user_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2324 { 2325 struct dsa_port *dp = dsa_user_to_port(dev); 2326 struct dsa_switch *ds = dp->ds; 2327 unsigned long mask, new_prio; 2328 int err, port = dp->index; 2329 2330 if (!ds->ops->port_set_default_prio) 2331 return -EOPNOTSUPP; 2332 2333 err = dcb_ieee_delapp(dev, app); 2334 if (err) 2335 return err; 2336 2337 mask = dcb_ieee_getapp_mask(dev, app); 2338 new_prio = mask ? __fls(mask) : 0; 2339 2340 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2341 if (err) { 2342 dcb_ieee_setapp(dev, app); 2343 return err; 2344 } 2345 2346 return 0; 2347 } 2348 2349 static int __maybe_unused 2350 dsa_user_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2351 { 2352 struct dsa_port *dp = dsa_user_to_port(dev); 2353 struct dsa_switch *ds = dp->ds; 2354 int err, port = dp->index; 2355 u8 dscp = app->protocol; 2356 2357 if (!ds->ops->port_del_dscp_prio) 2358 return -EOPNOTSUPP; 2359 2360 err = dcb_ieee_delapp(dev, app); 2361 if (err) 2362 return err; 2363 2364 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2365 if (err) { 2366 dcb_ieee_setapp(dev, app); 2367 return err; 2368 } 2369 2370 if (!ds->dscp_prio_mapping_is_global) 2371 return 0; 2372 2373 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, true); 2374 if (err) { 2375 if (ds->ops->port_add_dscp_prio) 2376 ds->ops->port_add_dscp_prio(ds, port, dscp, 2377 app->priority); 2378 dcb_ieee_setapp(dev, app); 2379 return err; 2380 } 2381 2382 return 0; 2383 } 2384 2385 static int __maybe_unused dsa_user_dcbnl_ieee_delapp(struct net_device *dev, 2386 struct dcb_app *app) 2387 { 2388 switch (app->selector) { 2389 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2390 switch (app->protocol) { 2391 case 0: 2392 return dsa_user_dcbnl_del_default_prio(dev, app); 2393 default: 2394 return -EOPNOTSUPP; 2395 } 2396 break; 2397 case IEEE_8021QAZ_APP_SEL_DSCP: 2398 return dsa_user_dcbnl_del_dscp_prio(dev, app); 2399 default: 2400 return -EOPNOTSUPP; 2401 } 2402 } 2403 2404 /* Pre-populate the DCB application priority table with the priorities 2405 * configured during switch setup, which we read from hardware here. 2406 */ 2407 static int dsa_user_dcbnl_init(struct net_device *dev) 2408 { 2409 struct dsa_port *dp = dsa_user_to_port(dev); 2410 struct dsa_switch *ds = dp->ds; 2411 int port = dp->index; 2412 int err; 2413 2414 if (ds->ops->port_get_default_prio) { 2415 int prio = ds->ops->port_get_default_prio(ds, port); 2416 struct dcb_app app = { 2417 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2418 .protocol = 0, 2419 .priority = prio, 2420 }; 2421 2422 if (prio < 0) 2423 return prio; 2424 2425 err = dcb_ieee_setapp(dev, &app); 2426 if (err) 2427 return err; 2428 } 2429 2430 if (ds->ops->port_get_dscp_prio) { 2431 int protocol; 2432 2433 for (protocol = 0; protocol < 64; protocol++) { 2434 struct dcb_app app = { 2435 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2436 .protocol = protocol, 2437 }; 2438 int prio; 2439 2440 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2441 if (prio == -EOPNOTSUPP) 2442 continue; 2443 if (prio < 0) 2444 return prio; 2445 2446 app.priority = prio; 2447 2448 err = dcb_ieee_setapp(dev, &app); 2449 if (err) 2450 return err; 2451 } 2452 } 2453 2454 return 0; 2455 } 2456 2457 static const struct ethtool_ops dsa_user_ethtool_ops = { 2458 .get_drvinfo = dsa_user_get_drvinfo, 2459 .get_regs_len = dsa_user_get_regs_len, 2460 .get_regs = dsa_user_get_regs, 2461 .nway_reset = dsa_user_nway_reset, 2462 .get_link = ethtool_op_get_link, 2463 .get_eeprom_len = dsa_user_get_eeprom_len, 2464 .get_eeprom = dsa_user_get_eeprom, 2465 .set_eeprom = dsa_user_set_eeprom, 2466 .get_strings = dsa_user_get_strings, 2467 .get_ethtool_stats = dsa_user_get_ethtool_stats, 2468 .get_sset_count = dsa_user_get_sset_count, 2469 .get_eth_phy_stats = dsa_user_get_eth_phy_stats, 2470 .get_eth_mac_stats = dsa_user_get_eth_mac_stats, 2471 .get_eth_ctrl_stats = dsa_user_get_eth_ctrl_stats, 2472 .get_rmon_stats = dsa_user_get_rmon_stats, 2473 .set_wol = dsa_user_set_wol, 2474 .get_wol = dsa_user_get_wol, 2475 .set_eee = dsa_user_set_eee, 2476 .get_eee = dsa_user_get_eee, 2477 .get_link_ksettings = dsa_user_get_link_ksettings, 2478 .set_link_ksettings = dsa_user_set_link_ksettings, 2479 .get_pause_stats = dsa_user_get_pause_stats, 2480 .get_pauseparam = dsa_user_get_pauseparam, 2481 .set_pauseparam = dsa_user_set_pauseparam, 2482 .get_rxnfc = dsa_user_get_rxnfc, 2483 .set_rxnfc = dsa_user_set_rxnfc, 2484 .get_ts_info = dsa_user_get_ts_info, 2485 .self_test = dsa_user_net_selftest, 2486 .get_mm = dsa_user_get_mm, 2487 .set_mm = dsa_user_set_mm, 2488 .get_mm_stats = dsa_user_get_mm_stats, 2489 }; 2490 2491 static const struct dcbnl_rtnl_ops __maybe_unused dsa_user_dcbnl_ops = { 2492 .ieee_setapp = dsa_user_dcbnl_ieee_setapp, 2493 .ieee_delapp = dsa_user_dcbnl_ieee_delapp, 2494 .dcbnl_setapptrust = dsa_user_dcbnl_set_apptrust, 2495 .dcbnl_getapptrust = dsa_user_dcbnl_get_apptrust, 2496 }; 2497 2498 static void dsa_user_get_stats64(struct net_device *dev, 2499 struct rtnl_link_stats64 *s) 2500 { 2501 struct dsa_port *dp = dsa_user_to_port(dev); 2502 struct dsa_switch *ds = dp->ds; 2503 2504 if (ds->ops->get_stats64) 2505 ds->ops->get_stats64(ds, dp->index, s); 2506 else 2507 dev_get_tstats64(dev, s); 2508 } 2509 2510 static int dsa_user_fill_forward_path(struct net_device_path_ctx *ctx, 2511 struct net_device_path *path) 2512 { 2513 struct dsa_port *dp = dsa_user_to_port(ctx->dev); 2514 struct net_device *conduit = dsa_port_to_conduit(dp); 2515 struct dsa_port *cpu_dp = dp->cpu_dp; 2516 2517 path->dev = ctx->dev; 2518 path->type = DEV_PATH_DSA; 2519 path->dsa.proto = cpu_dp->tag_ops->proto; 2520 path->dsa.port = dp->index; 2521 ctx->dev = conduit; 2522 2523 return 0; 2524 } 2525 2526 static const struct net_device_ops dsa_user_netdev_ops = { 2527 .ndo_open = dsa_user_open, 2528 .ndo_stop = dsa_user_close, 2529 .ndo_start_xmit = dsa_user_xmit, 2530 .ndo_change_rx_flags = dsa_user_change_rx_flags, 2531 .ndo_set_rx_mode = dsa_user_set_rx_mode, 2532 .ndo_set_mac_address = dsa_user_set_mac_address, 2533 .ndo_fdb_dump = dsa_user_fdb_dump, 2534 .ndo_eth_ioctl = dsa_user_ioctl, 2535 .ndo_get_iflink = dsa_user_get_iflink, 2536 #ifdef CONFIG_NET_POLL_CONTROLLER 2537 .ndo_netpoll_setup = dsa_user_netpoll_setup, 2538 .ndo_netpoll_cleanup = dsa_user_netpoll_cleanup, 2539 .ndo_poll_controller = dsa_user_poll_controller, 2540 #endif 2541 .ndo_setup_tc = dsa_user_setup_tc, 2542 .ndo_get_stats64 = dsa_user_get_stats64, 2543 .ndo_vlan_rx_add_vid = dsa_user_vlan_rx_add_vid, 2544 .ndo_vlan_rx_kill_vid = dsa_user_vlan_rx_kill_vid, 2545 .ndo_change_mtu = dsa_user_change_mtu, 2546 .ndo_fill_forward_path = dsa_user_fill_forward_path, 2547 }; 2548 2549 static const struct device_type dsa_type = { 2550 .name = "dsa", 2551 }; 2552 2553 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2554 { 2555 const struct dsa_port *dp = dsa_to_port(ds, port); 2556 2557 if (dp->pl) 2558 phylink_mac_change(dp->pl, up); 2559 } 2560 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2561 2562 static void dsa_user_phylink_fixed_state(struct phylink_config *config, 2563 struct phylink_link_state *state) 2564 { 2565 struct dsa_port *dp = dsa_phylink_to_port(config); 2566 struct dsa_switch *ds = dp->ds; 2567 2568 /* No need to check that this operation is valid, the callback would 2569 * not be called if it was not. 2570 */ 2571 ds->ops->phylink_fixed_state(ds, dp->index, state); 2572 } 2573 2574 /* user device setup *******************************************************/ 2575 static int dsa_user_phy_connect(struct net_device *user_dev, int addr, 2576 u32 flags) 2577 { 2578 struct dsa_port *dp = dsa_user_to_port(user_dev); 2579 struct dsa_switch *ds = dp->ds; 2580 2581 user_dev->phydev = mdiobus_get_phy(ds->user_mii_bus, addr); 2582 if (!user_dev->phydev) { 2583 netdev_err(user_dev, "no phy at %d\n", addr); 2584 return -ENODEV; 2585 } 2586 2587 user_dev->phydev->dev_flags |= flags; 2588 2589 return phylink_connect_phy(dp->pl, user_dev->phydev); 2590 } 2591 2592 static int dsa_user_phy_setup(struct net_device *user_dev) 2593 { 2594 struct dsa_port *dp = dsa_user_to_port(user_dev); 2595 struct device_node *port_dn = dp->dn; 2596 struct dsa_switch *ds = dp->ds; 2597 u32 phy_flags = 0; 2598 int ret; 2599 2600 dp->pl_config.dev = &user_dev->dev; 2601 dp->pl_config.type = PHYLINK_NETDEV; 2602 2603 /* The get_fixed_state callback takes precedence over polling the 2604 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2605 * this if the switch provides such a callback. 2606 */ 2607 if (ds->ops->phylink_fixed_state) { 2608 dp->pl_config.get_fixed_state = dsa_user_phylink_fixed_state; 2609 dp->pl_config.poll_fixed_state = true; 2610 } 2611 2612 ret = dsa_port_phylink_create(dp); 2613 if (ret) 2614 return ret; 2615 2616 if (ds->ops->get_phy_flags) 2617 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2618 2619 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2620 if (ret == -ENODEV && ds->user_mii_bus) { 2621 /* We could not connect to a designated PHY or SFP, so try to 2622 * use the switch internal MDIO bus instead 2623 */ 2624 ret = dsa_user_phy_connect(user_dev, dp->index, phy_flags); 2625 } 2626 if (ret) { 2627 netdev_err(user_dev, "failed to connect to PHY: %pe\n", 2628 ERR_PTR(ret)); 2629 dsa_port_phylink_destroy(dp); 2630 } 2631 2632 return ret; 2633 } 2634 2635 void dsa_user_setup_tagger(struct net_device *user) 2636 { 2637 struct dsa_port *dp = dsa_user_to_port(user); 2638 struct net_device *conduit = dsa_port_to_conduit(dp); 2639 struct dsa_user_priv *p = netdev_priv(user); 2640 const struct dsa_port *cpu_dp = dp->cpu_dp; 2641 const struct dsa_switch *ds = dp->ds; 2642 2643 user->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2644 user->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2645 /* Try to save one extra realloc later in the TX path (in the conduit) 2646 * by also inheriting the conduit's needed headroom and tailroom. 2647 * The 8021q driver also does this. 2648 */ 2649 user->needed_headroom += conduit->needed_headroom; 2650 user->needed_tailroom += conduit->needed_tailroom; 2651 2652 p->xmit = cpu_dp->tag_ops->xmit; 2653 2654 user->features = conduit->vlan_features | NETIF_F_HW_TC; 2655 user->hw_features |= NETIF_F_HW_TC; 2656 if (user->needed_tailroom) 2657 user->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2658 if (ds->needs_standalone_vlan_filtering) 2659 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2660 2661 user->lltx = true; 2662 } 2663 2664 int dsa_user_suspend(struct net_device *user_dev) 2665 { 2666 struct dsa_port *dp = dsa_user_to_port(user_dev); 2667 2668 if (!netif_running(user_dev)) 2669 return 0; 2670 2671 netif_device_detach(user_dev); 2672 2673 rtnl_lock(); 2674 phylink_stop(dp->pl); 2675 rtnl_unlock(); 2676 2677 return 0; 2678 } 2679 2680 int dsa_user_resume(struct net_device *user_dev) 2681 { 2682 struct dsa_port *dp = dsa_user_to_port(user_dev); 2683 2684 if (!netif_running(user_dev)) 2685 return 0; 2686 2687 netif_device_attach(user_dev); 2688 2689 rtnl_lock(); 2690 phylink_start(dp->pl); 2691 rtnl_unlock(); 2692 2693 return 0; 2694 } 2695 2696 int dsa_user_create(struct dsa_port *port) 2697 { 2698 struct net_device *conduit = dsa_port_to_conduit(port); 2699 struct dsa_switch *ds = port->ds; 2700 struct net_device *user_dev; 2701 struct dsa_user_priv *p; 2702 const char *name; 2703 int assign_type; 2704 int ret; 2705 2706 if (!ds->num_tx_queues) 2707 ds->num_tx_queues = 1; 2708 2709 if (port->name) { 2710 name = port->name; 2711 assign_type = NET_NAME_PREDICTABLE; 2712 } else { 2713 name = "eth%d"; 2714 assign_type = NET_NAME_ENUM; 2715 } 2716 2717 user_dev = alloc_netdev_mqs(sizeof(struct dsa_user_priv), name, 2718 assign_type, ether_setup, 2719 ds->num_tx_queues, 1); 2720 if (user_dev == NULL) 2721 return -ENOMEM; 2722 2723 user_dev->rtnl_link_ops = &dsa_link_ops; 2724 user_dev->ethtool_ops = &dsa_user_ethtool_ops; 2725 #if IS_ENABLED(CONFIG_DCB) 2726 user_dev->dcbnl_ops = &dsa_user_dcbnl_ops; 2727 #endif 2728 if (!is_zero_ether_addr(port->mac)) 2729 eth_hw_addr_set(user_dev, port->mac); 2730 else 2731 eth_hw_addr_inherit(user_dev, conduit); 2732 user_dev->priv_flags |= IFF_NO_QUEUE; 2733 if (dsa_switch_supports_uc_filtering(ds)) 2734 user_dev->priv_flags |= IFF_UNICAST_FLT; 2735 user_dev->netdev_ops = &dsa_user_netdev_ops; 2736 if (ds->ops->port_max_mtu) 2737 user_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2738 SET_NETDEV_DEVTYPE(user_dev, &dsa_type); 2739 2740 SET_NETDEV_DEV(user_dev, port->ds->dev); 2741 SET_NETDEV_DEVLINK_PORT(user_dev, &port->devlink_port); 2742 user_dev->dev.of_node = port->dn; 2743 user_dev->vlan_features = conduit->vlan_features; 2744 2745 p = netdev_priv(user_dev); 2746 user_dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2747 2748 ret = gro_cells_init(&p->gcells, user_dev); 2749 if (ret) 2750 goto out_free; 2751 2752 p->dp = port; 2753 INIT_LIST_HEAD(&p->mall_tc_list); 2754 port->user = user_dev; 2755 dsa_user_setup_tagger(user_dev); 2756 2757 netif_carrier_off(user_dev); 2758 2759 ret = dsa_user_phy_setup(user_dev); 2760 if (ret) { 2761 netdev_err(user_dev, 2762 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2763 ret, ds->dst->index, ds->index, port->index); 2764 goto out_gcells; 2765 } 2766 2767 rtnl_lock(); 2768 2769 ret = dsa_user_change_mtu(user_dev, ETH_DATA_LEN); 2770 if (ret && ret != -EOPNOTSUPP) 2771 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2772 ret, ETH_DATA_LEN, port->index); 2773 2774 ret = register_netdevice(user_dev); 2775 if (ret) { 2776 netdev_err(conduit, "error %d registering interface %s\n", 2777 ret, user_dev->name); 2778 rtnl_unlock(); 2779 goto out_phy; 2780 } 2781 2782 if (IS_ENABLED(CONFIG_DCB)) { 2783 ret = dsa_user_dcbnl_init(user_dev); 2784 if (ret) { 2785 netdev_err(user_dev, 2786 "failed to initialize DCB: %pe\n", 2787 ERR_PTR(ret)); 2788 rtnl_unlock(); 2789 goto out_unregister; 2790 } 2791 } 2792 2793 ret = netdev_upper_dev_link(conduit, user_dev, NULL); 2794 2795 rtnl_unlock(); 2796 2797 if (ret) 2798 goto out_unregister; 2799 2800 return 0; 2801 2802 out_unregister: 2803 unregister_netdev(user_dev); 2804 out_phy: 2805 rtnl_lock(); 2806 phylink_disconnect_phy(p->dp->pl); 2807 rtnl_unlock(); 2808 dsa_port_phylink_destroy(p->dp); 2809 out_gcells: 2810 gro_cells_destroy(&p->gcells); 2811 out_free: 2812 free_netdev(user_dev); 2813 port->user = NULL; 2814 return ret; 2815 } 2816 2817 void dsa_user_destroy(struct net_device *user_dev) 2818 { 2819 struct net_device *conduit = dsa_user_to_conduit(user_dev); 2820 struct dsa_port *dp = dsa_user_to_port(user_dev); 2821 struct dsa_user_priv *p = netdev_priv(user_dev); 2822 2823 netif_carrier_off(user_dev); 2824 rtnl_lock(); 2825 netdev_upper_dev_unlink(conduit, user_dev); 2826 unregister_netdevice(user_dev); 2827 phylink_disconnect_phy(dp->pl); 2828 rtnl_unlock(); 2829 2830 dsa_port_phylink_destroy(dp); 2831 gro_cells_destroy(&p->gcells); 2832 free_netdev(user_dev); 2833 } 2834 2835 int dsa_user_change_conduit(struct net_device *dev, struct net_device *conduit, 2836 struct netlink_ext_ack *extack) 2837 { 2838 struct net_device *old_conduit = dsa_user_to_conduit(dev); 2839 struct dsa_port *dp = dsa_user_to_port(dev); 2840 struct dsa_switch *ds = dp->ds; 2841 struct net_device *upper; 2842 struct list_head *iter; 2843 int err; 2844 2845 if (conduit == old_conduit) 2846 return 0; 2847 2848 if (!ds->ops->port_change_conduit) { 2849 NL_SET_ERR_MSG_MOD(extack, 2850 "Driver does not support changing DSA conduit"); 2851 return -EOPNOTSUPP; 2852 } 2853 2854 if (!netdev_uses_dsa(conduit)) { 2855 NL_SET_ERR_MSG_MOD(extack, 2856 "Interface not eligible as DSA conduit"); 2857 return -EOPNOTSUPP; 2858 } 2859 2860 netdev_for_each_upper_dev_rcu(conduit, upper, iter) { 2861 if (dsa_user_dev_check(upper)) 2862 continue; 2863 if (netif_is_bridge_master(upper)) 2864 continue; 2865 NL_SET_ERR_MSG_MOD(extack, "Cannot join conduit with unknown uppers"); 2866 return -EOPNOTSUPP; 2867 } 2868 2869 /* Since we allow live-changing the DSA conduit, plus we auto-open the 2870 * DSA conduit when the user port opens => we need to ensure that the 2871 * new DSA conduit is open too. 2872 */ 2873 if (dev->flags & IFF_UP) { 2874 err = dev_open(conduit, extack); 2875 if (err) 2876 return err; 2877 } 2878 2879 netdev_upper_dev_unlink(old_conduit, dev); 2880 2881 err = netdev_upper_dev_link(conduit, dev, extack); 2882 if (err) 2883 goto out_revert_old_conduit_unlink; 2884 2885 err = dsa_port_change_conduit(dp, conduit, extack); 2886 if (err) 2887 goto out_revert_conduit_link; 2888 2889 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2890 err = dsa_user_change_mtu(dev, dev->mtu); 2891 if (err && err != -EOPNOTSUPP) { 2892 netdev_warn(dev, 2893 "nonfatal error updating MTU with new conduit: %pe\n", 2894 ERR_PTR(err)); 2895 } 2896 2897 return 0; 2898 2899 out_revert_conduit_link: 2900 netdev_upper_dev_unlink(conduit, dev); 2901 out_revert_old_conduit_unlink: 2902 netdev_upper_dev_link(old_conduit, dev, NULL); 2903 return err; 2904 } 2905 2906 bool dsa_user_dev_check(const struct net_device *dev) 2907 { 2908 return dev->netdev_ops == &dsa_user_netdev_ops; 2909 } 2910 EXPORT_SYMBOL_GPL(dsa_user_dev_check); 2911 2912 static int dsa_user_changeupper(struct net_device *dev, 2913 struct netdev_notifier_changeupper_info *info) 2914 { 2915 struct netlink_ext_ack *extack; 2916 int err = NOTIFY_DONE; 2917 struct dsa_port *dp; 2918 2919 if (!dsa_user_dev_check(dev)) 2920 return err; 2921 2922 dp = dsa_user_to_port(dev); 2923 extack = netdev_notifier_info_to_extack(&info->info); 2924 2925 if (netif_is_bridge_master(info->upper_dev)) { 2926 if (info->linking) { 2927 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2928 if (!err) 2929 dsa_bridge_mtu_normalization(dp); 2930 if (err == -EOPNOTSUPP) { 2931 NL_SET_ERR_MSG_WEAK_MOD(extack, 2932 "Offloading not supported"); 2933 err = 0; 2934 } 2935 err = notifier_from_errno(err); 2936 } else { 2937 dsa_port_bridge_leave(dp, info->upper_dev); 2938 err = NOTIFY_OK; 2939 } 2940 } else if (netif_is_lag_master(info->upper_dev)) { 2941 if (info->linking) { 2942 err = dsa_port_lag_join(dp, info->upper_dev, 2943 info->upper_info, extack); 2944 if (err == -EOPNOTSUPP) { 2945 NL_SET_ERR_MSG_WEAK_MOD(extack, 2946 "Offloading not supported"); 2947 err = 0; 2948 } 2949 err = notifier_from_errno(err); 2950 } else { 2951 dsa_port_lag_leave(dp, info->upper_dev); 2952 err = NOTIFY_OK; 2953 } 2954 } else if (is_hsr_master(info->upper_dev)) { 2955 if (info->linking) { 2956 err = dsa_port_hsr_join(dp, info->upper_dev, extack); 2957 if (err == -EOPNOTSUPP) { 2958 NL_SET_ERR_MSG_WEAK_MOD(extack, 2959 "Offloading not supported"); 2960 err = 0; 2961 } 2962 err = notifier_from_errno(err); 2963 } else { 2964 dsa_port_hsr_leave(dp, info->upper_dev); 2965 err = NOTIFY_OK; 2966 } 2967 } 2968 2969 return err; 2970 } 2971 2972 static int dsa_user_prechangeupper(struct net_device *dev, 2973 struct netdev_notifier_changeupper_info *info) 2974 { 2975 struct dsa_port *dp; 2976 2977 if (!dsa_user_dev_check(dev)) 2978 return NOTIFY_DONE; 2979 2980 dp = dsa_user_to_port(dev); 2981 2982 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2983 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2984 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2985 dsa_port_pre_lag_leave(dp, info->upper_dev); 2986 /* dsa_port_pre_hsr_leave is not yet necessary since hsr devices cannot 2987 * meaningfully placed under a bridge yet 2988 */ 2989 2990 return NOTIFY_DONE; 2991 } 2992 2993 static int 2994 dsa_user_lag_changeupper(struct net_device *dev, 2995 struct netdev_notifier_changeupper_info *info) 2996 { 2997 struct net_device *lower; 2998 struct list_head *iter; 2999 int err = NOTIFY_DONE; 3000 struct dsa_port *dp; 3001 3002 if (!netif_is_lag_master(dev)) 3003 return err; 3004 3005 netdev_for_each_lower_dev(dev, lower, iter) { 3006 if (!dsa_user_dev_check(lower)) 3007 continue; 3008 3009 dp = dsa_user_to_port(lower); 3010 if (!dp->lag) 3011 /* Software LAG */ 3012 continue; 3013 3014 err = dsa_user_changeupper(lower, info); 3015 if (notifier_to_errno(err)) 3016 break; 3017 } 3018 3019 return err; 3020 } 3021 3022 /* Same as dsa_user_lag_changeupper() except that it calls 3023 * dsa_user_prechangeupper() 3024 */ 3025 static int 3026 dsa_user_lag_prechangeupper(struct net_device *dev, 3027 struct netdev_notifier_changeupper_info *info) 3028 { 3029 struct net_device *lower; 3030 struct list_head *iter; 3031 int err = NOTIFY_DONE; 3032 struct dsa_port *dp; 3033 3034 if (!netif_is_lag_master(dev)) 3035 return err; 3036 3037 netdev_for_each_lower_dev(dev, lower, iter) { 3038 if (!dsa_user_dev_check(lower)) 3039 continue; 3040 3041 dp = dsa_user_to_port(lower); 3042 if (!dp->lag) 3043 /* Software LAG */ 3044 continue; 3045 3046 err = dsa_user_prechangeupper(lower, info); 3047 if (notifier_to_errno(err)) 3048 break; 3049 } 3050 3051 return err; 3052 } 3053 3054 static int 3055 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 3056 struct netdev_notifier_changeupper_info *info) 3057 { 3058 struct netlink_ext_ack *ext_ack; 3059 struct net_device *user, *br; 3060 struct dsa_port *dp; 3061 3062 ext_ack = netdev_notifier_info_to_extack(&info->info); 3063 3064 if (!is_vlan_dev(dev)) 3065 return NOTIFY_DONE; 3066 3067 user = vlan_dev_real_dev(dev); 3068 if (!dsa_user_dev_check(user)) 3069 return NOTIFY_DONE; 3070 3071 dp = dsa_user_to_port(user); 3072 br = dsa_port_bridge_dev_get(dp); 3073 if (!br) 3074 return NOTIFY_DONE; 3075 3076 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 3077 if (br_vlan_enabled(br) && 3078 netif_is_bridge_master(info->upper_dev) && info->linking) { 3079 NL_SET_ERR_MSG_MOD(ext_ack, 3080 "Cannot make VLAN device join VLAN-aware bridge"); 3081 return notifier_from_errno(-EINVAL); 3082 } 3083 3084 return NOTIFY_DONE; 3085 } 3086 3087 static int 3088 dsa_user_check_8021q_upper(struct net_device *dev, 3089 struct netdev_notifier_changeupper_info *info) 3090 { 3091 struct dsa_port *dp = dsa_user_to_port(dev); 3092 struct net_device *br = dsa_port_bridge_dev_get(dp); 3093 struct bridge_vlan_info br_info; 3094 struct netlink_ext_ack *extack; 3095 int err = NOTIFY_DONE; 3096 u16 vid; 3097 3098 if (!br || !br_vlan_enabled(br)) 3099 return NOTIFY_DONE; 3100 3101 extack = netdev_notifier_info_to_extack(&info->info); 3102 vid = vlan_dev_vlan_id(info->upper_dev); 3103 3104 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 3105 * device, respectively the VID is not found, returning 3106 * 0 means success, which is a failure for us here. 3107 */ 3108 err = br_vlan_get_info(br, vid, &br_info); 3109 if (err == 0) { 3110 NL_SET_ERR_MSG_MOD(extack, 3111 "This VLAN is already configured by the bridge"); 3112 return notifier_from_errno(-EBUSY); 3113 } 3114 3115 return NOTIFY_DONE; 3116 } 3117 3118 static int 3119 dsa_user_prechangeupper_sanity_check(struct net_device *dev, 3120 struct netdev_notifier_changeupper_info *info) 3121 { 3122 struct dsa_switch *ds; 3123 struct dsa_port *dp; 3124 int err; 3125 3126 if (!dsa_user_dev_check(dev)) 3127 return dsa_prevent_bridging_8021q_upper(dev, info); 3128 3129 dp = dsa_user_to_port(dev); 3130 ds = dp->ds; 3131 3132 if (ds->ops->port_prechangeupper) { 3133 err = ds->ops->port_prechangeupper(ds, dp->index, info); 3134 if (err) 3135 return notifier_from_errno(err); 3136 } 3137 3138 if (is_vlan_dev(info->upper_dev)) 3139 return dsa_user_check_8021q_upper(dev, info); 3140 3141 return NOTIFY_DONE; 3142 } 3143 3144 /* To be eligible as a DSA conduit, a LAG must have all lower interfaces be 3145 * eligible DSA conduits. Additionally, all LAG slaves must be DSA conduits of 3146 * switches in the same switch tree. 3147 */ 3148 static int dsa_lag_conduit_validate(struct net_device *lag_dev, 3149 struct netlink_ext_ack *extack) 3150 { 3151 struct net_device *lower1, *lower2; 3152 struct list_head *iter1, *iter2; 3153 3154 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 3155 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 3156 if (!netdev_uses_dsa(lower1) || 3157 !netdev_uses_dsa(lower2)) { 3158 NL_SET_ERR_MSG_MOD(extack, 3159 "All LAG ports must be eligible as DSA conduits"); 3160 return notifier_from_errno(-EINVAL); 3161 } 3162 3163 if (lower1 == lower2) 3164 continue; 3165 3166 if (!dsa_port_tree_same(lower1->dsa_ptr, 3167 lower2->dsa_ptr)) { 3168 NL_SET_ERR_MSG_MOD(extack, 3169 "LAG contains DSA conduits of disjoint switch trees"); 3170 return notifier_from_errno(-EINVAL); 3171 } 3172 } 3173 } 3174 3175 return NOTIFY_DONE; 3176 } 3177 3178 static int 3179 dsa_conduit_prechangeupper_sanity_check(struct net_device *conduit, 3180 struct netdev_notifier_changeupper_info *info) 3181 { 3182 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3183 3184 if (!netdev_uses_dsa(conduit)) 3185 return NOTIFY_DONE; 3186 3187 if (!info->linking) 3188 return NOTIFY_DONE; 3189 3190 /* Allow DSA switch uppers */ 3191 if (dsa_user_dev_check(info->upper_dev)) 3192 return NOTIFY_DONE; 3193 3194 /* Allow bridge uppers of DSA conduits, subject to further 3195 * restrictions in dsa_bridge_prechangelower_sanity_check() 3196 */ 3197 if (netif_is_bridge_master(info->upper_dev)) 3198 return NOTIFY_DONE; 3199 3200 /* Allow LAG uppers, subject to further restrictions in 3201 * dsa_lag_conduit_prechangelower_sanity_check() 3202 */ 3203 if (netif_is_lag_master(info->upper_dev)) 3204 return dsa_lag_conduit_validate(info->upper_dev, extack); 3205 3206 NL_SET_ERR_MSG_MOD(extack, 3207 "DSA conduit cannot join unknown upper interfaces"); 3208 return notifier_from_errno(-EBUSY); 3209 } 3210 3211 static int 3212 dsa_lag_conduit_prechangelower_sanity_check(struct net_device *dev, 3213 struct netdev_notifier_changeupper_info *info) 3214 { 3215 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3216 struct net_device *lag_dev = info->upper_dev; 3217 struct net_device *lower; 3218 struct list_head *iter; 3219 3220 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 3221 return NOTIFY_DONE; 3222 3223 if (!info->linking) 3224 return NOTIFY_DONE; 3225 3226 if (!netdev_uses_dsa(dev)) { 3227 NL_SET_ERR_MSG(extack, 3228 "Only DSA conduits can join a LAG DSA conduit"); 3229 return notifier_from_errno(-EINVAL); 3230 } 3231 3232 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3233 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 3234 NL_SET_ERR_MSG(extack, 3235 "Interface is DSA conduit for a different switch tree than this LAG"); 3236 return notifier_from_errno(-EINVAL); 3237 } 3238 3239 break; 3240 } 3241 3242 return NOTIFY_DONE; 3243 } 3244 3245 /* Don't allow bridging of DSA conduits, since the bridge layer rx_handler 3246 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 3247 * chance to strip off and parse the DSA switch tag protocol header (the bridge 3248 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 3249 * frames). 3250 * The only case where that would not be an issue is when bridging can already 3251 * be offloaded, such as when the DSA conduit is itself a DSA or plain switchdev 3252 * port, and is bridged only with other ports from the same hardware device. 3253 */ 3254 static int 3255 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 3256 struct netdev_notifier_changeupper_info *info) 3257 { 3258 struct net_device *br = info->upper_dev; 3259 struct netlink_ext_ack *extack; 3260 struct net_device *lower; 3261 struct list_head *iter; 3262 3263 if (!netif_is_bridge_master(br)) 3264 return NOTIFY_DONE; 3265 3266 if (!info->linking) 3267 return NOTIFY_DONE; 3268 3269 extack = netdev_notifier_info_to_extack(&info->info); 3270 3271 netdev_for_each_lower_dev(br, lower, iter) { 3272 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 3273 continue; 3274 3275 if (!netdev_port_same_parent_id(lower, new_lower)) { 3276 NL_SET_ERR_MSG(extack, 3277 "Cannot do software bridging with a DSA conduit"); 3278 return notifier_from_errno(-EINVAL); 3279 } 3280 } 3281 3282 return NOTIFY_DONE; 3283 } 3284 3285 static void dsa_tree_migrate_ports_from_lag_conduit(struct dsa_switch_tree *dst, 3286 struct net_device *lag_dev) 3287 { 3288 struct net_device *new_conduit = dsa_tree_find_first_conduit(dst); 3289 struct dsa_port *dp; 3290 int err; 3291 3292 dsa_tree_for_each_user_port(dp, dst) { 3293 if (dsa_port_to_conduit(dp) != lag_dev) 3294 continue; 3295 3296 err = dsa_user_change_conduit(dp->user, new_conduit, NULL); 3297 if (err) { 3298 netdev_err(dp->user, 3299 "failed to restore conduit to %s: %pe\n", 3300 new_conduit->name, ERR_PTR(err)); 3301 } 3302 } 3303 } 3304 3305 static int dsa_conduit_lag_join(struct net_device *conduit, 3306 struct net_device *lag_dev, 3307 struct netdev_lag_upper_info *uinfo, 3308 struct netlink_ext_ack *extack) 3309 { 3310 struct dsa_port *cpu_dp = conduit->dsa_ptr; 3311 struct dsa_switch_tree *dst = cpu_dp->dst; 3312 struct dsa_port *dp; 3313 int err; 3314 3315 err = dsa_conduit_lag_setup(lag_dev, cpu_dp, uinfo, extack); 3316 if (err) 3317 return err; 3318 3319 dsa_tree_for_each_user_port(dp, dst) { 3320 if (dsa_port_to_conduit(dp) != conduit) 3321 continue; 3322 3323 err = dsa_user_change_conduit(dp->user, lag_dev, extack); 3324 if (err) 3325 goto restore; 3326 } 3327 3328 return 0; 3329 3330 restore: 3331 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3332 if (dsa_port_to_conduit(dp) != lag_dev) 3333 continue; 3334 3335 err = dsa_user_change_conduit(dp->user, conduit, NULL); 3336 if (err) { 3337 netdev_err(dp->user, 3338 "failed to restore conduit to %s: %pe\n", 3339 conduit->name, ERR_PTR(err)); 3340 } 3341 } 3342 3343 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3344 3345 return err; 3346 } 3347 3348 static void dsa_conduit_lag_leave(struct net_device *conduit, 3349 struct net_device *lag_dev) 3350 { 3351 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3352 struct dsa_switch_tree *dst = cpu_dp->dst; 3353 struct dsa_port *new_cpu_dp = NULL; 3354 struct net_device *lower; 3355 struct list_head *iter; 3356 3357 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3358 if (netdev_uses_dsa(lower)) { 3359 new_cpu_dp = lower->dsa_ptr; 3360 break; 3361 } 3362 } 3363 3364 if (new_cpu_dp) { 3365 /* Update the CPU port of the user ports still under the LAG 3366 * so that dsa_port_to_conduit() continues to work properly 3367 */ 3368 dsa_tree_for_each_user_port(dp, dst) 3369 if (dsa_port_to_conduit(dp) == lag_dev) 3370 dp->cpu_dp = new_cpu_dp; 3371 3372 /* Update the index of the virtual CPU port to match the lowest 3373 * physical CPU port 3374 */ 3375 lag_dev->dsa_ptr = new_cpu_dp; 3376 wmb(); 3377 } else { 3378 /* If the LAG DSA conduit has no ports left, migrate back all 3379 * user ports to the first physical CPU port 3380 */ 3381 dsa_tree_migrate_ports_from_lag_conduit(dst, lag_dev); 3382 } 3383 3384 /* This DSA conduit has left its LAG in any case, so let 3385 * the CPU port leave the hardware LAG as well 3386 */ 3387 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3388 } 3389 3390 static int dsa_conduit_changeupper(struct net_device *dev, 3391 struct netdev_notifier_changeupper_info *info) 3392 { 3393 struct netlink_ext_ack *extack; 3394 int err = NOTIFY_DONE; 3395 3396 if (!netdev_uses_dsa(dev)) 3397 return err; 3398 3399 extack = netdev_notifier_info_to_extack(&info->info); 3400 3401 if (netif_is_lag_master(info->upper_dev)) { 3402 if (info->linking) { 3403 err = dsa_conduit_lag_join(dev, info->upper_dev, 3404 info->upper_info, extack); 3405 err = notifier_from_errno(err); 3406 } else { 3407 dsa_conduit_lag_leave(dev, info->upper_dev); 3408 err = NOTIFY_OK; 3409 } 3410 } 3411 3412 return err; 3413 } 3414 3415 static int dsa_user_netdevice_event(struct notifier_block *nb, 3416 unsigned long event, void *ptr) 3417 { 3418 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3419 3420 switch (event) { 3421 case NETDEV_PRECHANGEUPPER: { 3422 struct netdev_notifier_changeupper_info *info = ptr; 3423 int err; 3424 3425 err = dsa_user_prechangeupper_sanity_check(dev, info); 3426 if (notifier_to_errno(err)) 3427 return err; 3428 3429 err = dsa_conduit_prechangeupper_sanity_check(dev, info); 3430 if (notifier_to_errno(err)) 3431 return err; 3432 3433 err = dsa_lag_conduit_prechangelower_sanity_check(dev, info); 3434 if (notifier_to_errno(err)) 3435 return err; 3436 3437 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3438 if (notifier_to_errno(err)) 3439 return err; 3440 3441 err = dsa_user_prechangeupper(dev, ptr); 3442 if (notifier_to_errno(err)) 3443 return err; 3444 3445 err = dsa_user_lag_prechangeupper(dev, ptr); 3446 if (notifier_to_errno(err)) 3447 return err; 3448 3449 break; 3450 } 3451 case NETDEV_CHANGEUPPER: { 3452 int err; 3453 3454 err = dsa_user_changeupper(dev, ptr); 3455 if (notifier_to_errno(err)) 3456 return err; 3457 3458 err = dsa_user_lag_changeupper(dev, ptr); 3459 if (notifier_to_errno(err)) 3460 return err; 3461 3462 err = dsa_conduit_changeupper(dev, ptr); 3463 if (notifier_to_errno(err)) 3464 return err; 3465 3466 break; 3467 } 3468 case NETDEV_CHANGELOWERSTATE: { 3469 struct netdev_notifier_changelowerstate_info *info = ptr; 3470 struct dsa_port *dp; 3471 int err = 0; 3472 3473 if (dsa_user_dev_check(dev)) { 3474 dp = dsa_user_to_port(dev); 3475 3476 err = dsa_port_lag_change(dp, info->lower_state_info); 3477 } 3478 3479 /* Mirror LAG port events on DSA conduits that are in 3480 * a LAG towards their respective switch CPU ports 3481 */ 3482 if (netdev_uses_dsa(dev)) { 3483 dp = dev->dsa_ptr; 3484 3485 err = dsa_port_lag_change(dp, info->lower_state_info); 3486 } 3487 3488 return notifier_from_errno(err); 3489 } 3490 case NETDEV_CHANGE: 3491 case NETDEV_UP: { 3492 /* Track state of conduit port. 3493 * DSA driver may require the conduit port (and indirectly 3494 * the tagger) to be available for some special operation. 3495 */ 3496 if (netdev_uses_dsa(dev)) { 3497 struct dsa_port *cpu_dp = dev->dsa_ptr; 3498 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3499 3500 /* Track when the conduit port is UP */ 3501 dsa_tree_conduit_oper_state_change(dst, dev, 3502 netif_oper_up(dev)); 3503 3504 /* Track when the conduit port is ready and can accept 3505 * packet. 3506 * NETDEV_UP event is not enough to flag a port as ready. 3507 * We also have to wait for linkwatch_do_dev to dev_activate 3508 * and emit a NETDEV_CHANGE event. 3509 * We check if a conduit port is ready by checking if the dev 3510 * have a qdisc assigned and is not noop. 3511 */ 3512 dsa_tree_conduit_admin_state_change(dst, dev, 3513 !qdisc_tx_is_noop(dev)); 3514 3515 return NOTIFY_OK; 3516 } 3517 3518 return NOTIFY_DONE; 3519 } 3520 case NETDEV_GOING_DOWN: { 3521 struct dsa_port *dp, *cpu_dp; 3522 struct dsa_switch_tree *dst; 3523 LIST_HEAD(close_list); 3524 3525 if (!netdev_uses_dsa(dev)) 3526 return NOTIFY_DONE; 3527 3528 cpu_dp = dev->dsa_ptr; 3529 dst = cpu_dp->ds->dst; 3530 3531 dsa_tree_conduit_admin_state_change(dst, dev, false); 3532 3533 list_for_each_entry(dp, &dst->ports, list) { 3534 if (!dsa_port_is_user(dp)) 3535 continue; 3536 3537 if (dp->cpu_dp != cpu_dp) 3538 continue; 3539 3540 list_add(&dp->user->close_list, &close_list); 3541 } 3542 3543 dev_close_many(&close_list, true); 3544 3545 return NOTIFY_OK; 3546 } 3547 default: 3548 break; 3549 } 3550 3551 return NOTIFY_DONE; 3552 } 3553 3554 static void 3555 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3556 { 3557 struct switchdev_notifier_fdb_info info = {}; 3558 3559 info.addr = switchdev_work->addr; 3560 info.vid = switchdev_work->vid; 3561 info.offloaded = true; 3562 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3563 switchdev_work->orig_dev, &info.info, NULL); 3564 } 3565 3566 static void dsa_user_switchdev_event_work(struct work_struct *work) 3567 { 3568 struct dsa_switchdev_event_work *switchdev_work = 3569 container_of(work, struct dsa_switchdev_event_work, work); 3570 const unsigned char *addr = switchdev_work->addr; 3571 struct net_device *dev = switchdev_work->dev; 3572 u16 vid = switchdev_work->vid; 3573 struct dsa_switch *ds; 3574 struct dsa_port *dp; 3575 int err; 3576 3577 dp = dsa_user_to_port(dev); 3578 ds = dp->ds; 3579 3580 switch (switchdev_work->event) { 3581 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3582 if (switchdev_work->host_addr) 3583 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3584 else if (dp->lag) 3585 err = dsa_port_lag_fdb_add(dp, addr, vid); 3586 else 3587 err = dsa_port_fdb_add(dp, addr, vid); 3588 if (err) { 3589 dev_err(ds->dev, 3590 "port %d failed to add %pM vid %d to fdb: %d\n", 3591 dp->index, addr, vid, err); 3592 break; 3593 } 3594 dsa_fdb_offload_notify(switchdev_work); 3595 break; 3596 3597 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3598 if (switchdev_work->host_addr) 3599 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3600 else if (dp->lag) 3601 err = dsa_port_lag_fdb_del(dp, addr, vid); 3602 else 3603 err = dsa_port_fdb_del(dp, addr, vid); 3604 if (err) { 3605 dev_err(ds->dev, 3606 "port %d failed to delete %pM vid %d from fdb: %d\n", 3607 dp->index, addr, vid, err); 3608 } 3609 3610 break; 3611 } 3612 3613 kfree(switchdev_work); 3614 } 3615 3616 static bool dsa_foreign_dev_check(const struct net_device *dev, 3617 const struct net_device *foreign_dev) 3618 { 3619 const struct dsa_port *dp = dsa_user_to_port(dev); 3620 struct dsa_switch_tree *dst = dp->ds->dst; 3621 3622 if (netif_is_bridge_master(foreign_dev)) 3623 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3624 3625 if (netif_is_bridge_port(foreign_dev)) 3626 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3627 3628 /* Everything else is foreign */ 3629 return true; 3630 } 3631 3632 static int dsa_user_fdb_event(struct net_device *dev, 3633 struct net_device *orig_dev, 3634 unsigned long event, const void *ctx, 3635 const struct switchdev_notifier_fdb_info *fdb_info) 3636 { 3637 struct dsa_switchdev_event_work *switchdev_work; 3638 struct dsa_port *dp = dsa_user_to_port(dev); 3639 bool host_addr = fdb_info->is_local; 3640 struct dsa_switch *ds = dp->ds; 3641 3642 if (ctx && ctx != dp) 3643 return 0; 3644 3645 if (!dp->bridge) 3646 return 0; 3647 3648 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3649 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3650 return 0; 3651 3652 /* FDB entries learned by the software bridge or by foreign 3653 * bridge ports should be installed as host addresses only if 3654 * the driver requests assisted learning. 3655 */ 3656 if (!ds->assisted_learning_on_cpu_port) 3657 return 0; 3658 } 3659 3660 /* Also treat FDB entries on foreign interfaces bridged with us as host 3661 * addresses. 3662 */ 3663 if (dsa_foreign_dev_check(dev, orig_dev)) 3664 host_addr = true; 3665 3666 /* Check early that we're not doing work in vain. 3667 * Host addresses on LAG ports still require regular FDB ops, 3668 * since the CPU port isn't in a LAG. 3669 */ 3670 if (dp->lag && !host_addr) { 3671 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3672 return -EOPNOTSUPP; 3673 } else { 3674 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3675 return -EOPNOTSUPP; 3676 } 3677 3678 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3679 if (!switchdev_work) 3680 return -ENOMEM; 3681 3682 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3683 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3684 orig_dev->name, fdb_info->addr, fdb_info->vid, 3685 host_addr ? " as host address" : ""); 3686 3687 INIT_WORK(&switchdev_work->work, dsa_user_switchdev_event_work); 3688 switchdev_work->event = event; 3689 switchdev_work->dev = dev; 3690 switchdev_work->orig_dev = orig_dev; 3691 3692 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3693 switchdev_work->vid = fdb_info->vid; 3694 switchdev_work->host_addr = host_addr; 3695 3696 dsa_schedule_work(&switchdev_work->work); 3697 3698 return 0; 3699 } 3700 3701 /* Called under rcu_read_lock() */ 3702 static int dsa_user_switchdev_event(struct notifier_block *unused, 3703 unsigned long event, void *ptr) 3704 { 3705 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3706 int err; 3707 3708 switch (event) { 3709 case SWITCHDEV_PORT_ATTR_SET: 3710 err = switchdev_handle_port_attr_set(dev, ptr, 3711 dsa_user_dev_check, 3712 dsa_user_port_attr_set); 3713 return notifier_from_errno(err); 3714 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3715 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3716 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3717 dsa_user_dev_check, 3718 dsa_foreign_dev_check, 3719 dsa_user_fdb_event); 3720 return notifier_from_errno(err); 3721 default: 3722 return NOTIFY_DONE; 3723 } 3724 3725 return NOTIFY_OK; 3726 } 3727 3728 static int dsa_user_switchdev_blocking_event(struct notifier_block *unused, 3729 unsigned long event, void *ptr) 3730 { 3731 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3732 int err; 3733 3734 switch (event) { 3735 case SWITCHDEV_PORT_OBJ_ADD: 3736 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3737 dsa_user_dev_check, 3738 dsa_foreign_dev_check, 3739 dsa_user_port_obj_add); 3740 return notifier_from_errno(err); 3741 case SWITCHDEV_PORT_OBJ_DEL: 3742 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3743 dsa_user_dev_check, 3744 dsa_foreign_dev_check, 3745 dsa_user_port_obj_del); 3746 return notifier_from_errno(err); 3747 case SWITCHDEV_PORT_ATTR_SET: 3748 err = switchdev_handle_port_attr_set(dev, ptr, 3749 dsa_user_dev_check, 3750 dsa_user_port_attr_set); 3751 return notifier_from_errno(err); 3752 } 3753 3754 return NOTIFY_DONE; 3755 } 3756 3757 static struct notifier_block dsa_user_nb __read_mostly = { 3758 .notifier_call = dsa_user_netdevice_event, 3759 }; 3760 3761 struct notifier_block dsa_user_switchdev_notifier = { 3762 .notifier_call = dsa_user_switchdev_event, 3763 }; 3764 3765 struct notifier_block dsa_user_switchdev_blocking_notifier = { 3766 .notifier_call = dsa_user_switchdev_blocking_event, 3767 }; 3768 3769 int dsa_user_register_notifier(void) 3770 { 3771 struct notifier_block *nb; 3772 int err; 3773 3774 err = register_netdevice_notifier(&dsa_user_nb); 3775 if (err) 3776 return err; 3777 3778 err = register_switchdev_notifier(&dsa_user_switchdev_notifier); 3779 if (err) 3780 goto err_switchdev_nb; 3781 3782 nb = &dsa_user_switchdev_blocking_notifier; 3783 err = register_switchdev_blocking_notifier(nb); 3784 if (err) 3785 goto err_switchdev_blocking_nb; 3786 3787 return 0; 3788 3789 err_switchdev_blocking_nb: 3790 unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3791 err_switchdev_nb: 3792 unregister_netdevice_notifier(&dsa_user_nb); 3793 return err; 3794 } 3795 3796 void dsa_user_unregister_notifier(void) 3797 { 3798 struct notifier_block *nb; 3799 int err; 3800 3801 nb = &dsa_user_switchdev_blocking_notifier; 3802 err = unregister_switchdev_blocking_notifier(nb); 3803 if (err) 3804 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3805 3806 err = unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3807 if (err) 3808 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3809 3810 err = unregister_netdevice_notifier(&dsa_user_nb); 3811 if (err) 3812 pr_err("DSA: failed to unregister user notifier (%d)\n", err); 3813 } 3814