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 NL_SET_ERR_MSG_MOD(extack, 1381 "Can only offload \"protocol all\" matchall filter"); 1382 return -EOPNOTSUPP; 1383 } 1384 1385 if (!ds->ops->port_mirror_add) { 1386 NL_SET_ERR_MSG_MOD(extack, 1387 "Switch does not support mirroring operation"); 1388 return -EOPNOTSUPP; 1389 } 1390 1391 if (!flow_action_basic_hw_stats_check(&cls->rule->action, extack)) 1392 return -EOPNOTSUPP; 1393 1394 act = &cls->rule->action.entries[0]; 1395 1396 if (!act->dev) 1397 return -EINVAL; 1398 1399 if (!dsa_user_dev_check(act->dev)) 1400 return -EOPNOTSUPP; 1401 1402 to_dp = dsa_user_to_port(act->dev); 1403 1404 if (dp->ds != to_dp->ds) { 1405 NL_SET_ERR_MSG_MOD(extack, 1406 "Cross-chip mirroring not implemented"); 1407 return -EOPNOTSUPP; 1408 } 1409 1410 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1411 if (!mall_tc_entry) 1412 return -ENOMEM; 1413 1414 mall_tc_entry->cookie = cls->cookie; 1415 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1416 mirror = &mall_tc_entry->mirror; 1417 mirror->to_local_port = to_dp->index; 1418 mirror->ingress = ingress; 1419 1420 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1421 if (err) { 1422 kfree(mall_tc_entry); 1423 return err; 1424 } 1425 1426 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1427 1428 return err; 1429 } 1430 1431 static int 1432 dsa_user_add_cls_matchall_police(struct net_device *dev, 1433 struct tc_cls_matchall_offload *cls, 1434 bool ingress) 1435 { 1436 struct netlink_ext_ack *extack = cls->common.extack; 1437 struct dsa_port *dp = dsa_user_to_port(dev); 1438 struct dsa_user_priv *p = netdev_priv(dev); 1439 struct dsa_mall_policer_tc_entry *policer; 1440 struct dsa_mall_tc_entry *mall_tc_entry; 1441 struct dsa_switch *ds = dp->ds; 1442 struct flow_action_entry *act; 1443 int err; 1444 1445 if (!ds->ops->port_policer_add) { 1446 NL_SET_ERR_MSG_MOD(extack, 1447 "Policing offload not implemented"); 1448 return -EOPNOTSUPP; 1449 } 1450 1451 if (!ingress) { 1452 NL_SET_ERR_MSG_MOD(extack, 1453 "Only supported on ingress qdisc"); 1454 return -EOPNOTSUPP; 1455 } 1456 1457 if (!flow_action_basic_hw_stats_check(&cls->rule->action, extack)) 1458 return -EOPNOTSUPP; 1459 1460 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1461 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1462 NL_SET_ERR_MSG_MOD(extack, 1463 "Only one port policer allowed"); 1464 return -EEXIST; 1465 } 1466 } 1467 1468 act = &cls->rule->action.entries[0]; 1469 1470 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1471 if (!mall_tc_entry) 1472 return -ENOMEM; 1473 1474 mall_tc_entry->cookie = cls->cookie; 1475 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1476 policer = &mall_tc_entry->policer; 1477 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1478 policer->burst = act->police.burst; 1479 1480 err = ds->ops->port_policer_add(ds, dp->index, policer); 1481 if (err) { 1482 kfree(mall_tc_entry); 1483 return err; 1484 } 1485 1486 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1487 1488 return err; 1489 } 1490 1491 static int dsa_user_add_cls_matchall(struct net_device *dev, 1492 struct tc_cls_matchall_offload *cls, 1493 bool ingress) 1494 { 1495 const struct flow_action *action = &cls->rule->action; 1496 struct netlink_ext_ack *extack = cls->common.extack; 1497 1498 if (!flow_offload_has_one_action(action)) { 1499 NL_SET_ERR_MSG_MOD(extack, 1500 "Cannot offload matchall filter with more than one action"); 1501 return -EOPNOTSUPP; 1502 } 1503 1504 switch (action->entries[0].id) { 1505 case FLOW_ACTION_MIRRED: 1506 return dsa_user_add_cls_matchall_mirred(dev, cls, ingress); 1507 case FLOW_ACTION_POLICE: 1508 return dsa_user_add_cls_matchall_police(dev, cls, ingress); 1509 default: 1510 NL_SET_ERR_MSG_MOD(extack, "Unknown action"); 1511 break; 1512 } 1513 1514 return -EOPNOTSUPP; 1515 } 1516 1517 static void dsa_user_del_cls_matchall(struct net_device *dev, 1518 struct tc_cls_matchall_offload *cls) 1519 { 1520 struct dsa_port *dp = dsa_user_to_port(dev); 1521 struct dsa_mall_tc_entry *mall_tc_entry; 1522 struct dsa_switch *ds = dp->ds; 1523 1524 mall_tc_entry = dsa_user_mall_tc_entry_find(dev, cls->cookie); 1525 if (!mall_tc_entry) 1526 return; 1527 1528 list_del(&mall_tc_entry->list); 1529 1530 switch (mall_tc_entry->type) { 1531 case DSA_PORT_MALL_MIRROR: 1532 if (ds->ops->port_mirror_del) 1533 ds->ops->port_mirror_del(ds, dp->index, 1534 &mall_tc_entry->mirror); 1535 break; 1536 case DSA_PORT_MALL_POLICER: 1537 if (ds->ops->port_policer_del) 1538 ds->ops->port_policer_del(ds, dp->index); 1539 break; 1540 default: 1541 WARN_ON(1); 1542 } 1543 1544 kfree(mall_tc_entry); 1545 } 1546 1547 static int dsa_user_setup_tc_cls_matchall(struct net_device *dev, 1548 struct tc_cls_matchall_offload *cls, 1549 bool ingress) 1550 { 1551 if (cls->common.chain_index) 1552 return -EOPNOTSUPP; 1553 1554 switch (cls->command) { 1555 case TC_CLSMATCHALL_REPLACE: 1556 return dsa_user_add_cls_matchall(dev, cls, ingress); 1557 case TC_CLSMATCHALL_DESTROY: 1558 dsa_user_del_cls_matchall(dev, cls); 1559 return 0; 1560 default: 1561 return -EOPNOTSUPP; 1562 } 1563 } 1564 1565 static int dsa_user_add_cls_flower(struct net_device *dev, 1566 struct flow_cls_offload *cls, 1567 bool ingress) 1568 { 1569 struct dsa_port *dp = dsa_user_to_port(dev); 1570 struct dsa_switch *ds = dp->ds; 1571 int port = dp->index; 1572 1573 if (!ds->ops->cls_flower_add) 1574 return -EOPNOTSUPP; 1575 1576 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1577 } 1578 1579 static int dsa_user_del_cls_flower(struct net_device *dev, 1580 struct flow_cls_offload *cls, 1581 bool ingress) 1582 { 1583 struct dsa_port *dp = dsa_user_to_port(dev); 1584 struct dsa_switch *ds = dp->ds; 1585 int port = dp->index; 1586 1587 if (!ds->ops->cls_flower_del) 1588 return -EOPNOTSUPP; 1589 1590 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1591 } 1592 1593 static int dsa_user_stats_cls_flower(struct net_device *dev, 1594 struct flow_cls_offload *cls, 1595 bool ingress) 1596 { 1597 struct dsa_port *dp = dsa_user_to_port(dev); 1598 struct dsa_switch *ds = dp->ds; 1599 int port = dp->index; 1600 1601 if (!ds->ops->cls_flower_stats) 1602 return -EOPNOTSUPP; 1603 1604 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1605 } 1606 1607 static int dsa_user_setup_tc_cls_flower(struct net_device *dev, 1608 struct flow_cls_offload *cls, 1609 bool ingress) 1610 { 1611 switch (cls->command) { 1612 case FLOW_CLS_REPLACE: 1613 return dsa_user_add_cls_flower(dev, cls, ingress); 1614 case FLOW_CLS_DESTROY: 1615 return dsa_user_del_cls_flower(dev, cls, ingress); 1616 case FLOW_CLS_STATS: 1617 return dsa_user_stats_cls_flower(dev, cls, ingress); 1618 default: 1619 return -EOPNOTSUPP; 1620 } 1621 } 1622 1623 static int dsa_user_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1624 void *cb_priv, bool ingress) 1625 { 1626 struct net_device *dev = cb_priv; 1627 1628 if (!tc_can_offload(dev)) 1629 return -EOPNOTSUPP; 1630 1631 switch (type) { 1632 case TC_SETUP_CLSMATCHALL: 1633 return dsa_user_setup_tc_cls_matchall(dev, type_data, ingress); 1634 case TC_SETUP_CLSFLOWER: 1635 return dsa_user_setup_tc_cls_flower(dev, type_data, ingress); 1636 default: 1637 return -EOPNOTSUPP; 1638 } 1639 } 1640 1641 static int dsa_user_setup_tc_block_cb_ig(enum tc_setup_type type, 1642 void *type_data, void *cb_priv) 1643 { 1644 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, true); 1645 } 1646 1647 static int dsa_user_setup_tc_block_cb_eg(enum tc_setup_type type, 1648 void *type_data, void *cb_priv) 1649 { 1650 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, false); 1651 } 1652 1653 static LIST_HEAD(dsa_user_block_cb_list); 1654 1655 static int dsa_user_setup_tc_block(struct net_device *dev, 1656 struct flow_block_offload *f) 1657 { 1658 struct flow_block_cb *block_cb; 1659 flow_setup_cb_t *cb; 1660 1661 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1662 cb = dsa_user_setup_tc_block_cb_ig; 1663 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1664 cb = dsa_user_setup_tc_block_cb_eg; 1665 else 1666 return -EOPNOTSUPP; 1667 1668 f->driver_block_list = &dsa_user_block_cb_list; 1669 1670 switch (f->command) { 1671 case FLOW_BLOCK_BIND: 1672 if (flow_block_cb_is_busy(cb, dev, &dsa_user_block_cb_list)) 1673 return -EBUSY; 1674 1675 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1676 if (IS_ERR(block_cb)) 1677 return PTR_ERR(block_cb); 1678 1679 flow_block_cb_add(block_cb, f); 1680 list_add_tail(&block_cb->driver_list, &dsa_user_block_cb_list); 1681 return 0; 1682 case FLOW_BLOCK_UNBIND: 1683 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1684 if (!block_cb) 1685 return -ENOENT; 1686 1687 flow_block_cb_remove(block_cb, f); 1688 list_del(&block_cb->driver_list); 1689 return 0; 1690 default: 1691 return -EOPNOTSUPP; 1692 } 1693 } 1694 1695 static int dsa_user_setup_ft_block(struct dsa_switch *ds, int port, 1696 void *type_data) 1697 { 1698 struct net_device *conduit = dsa_port_to_conduit(dsa_to_port(ds, port)); 1699 1700 if (!conduit->netdev_ops->ndo_setup_tc) 1701 return -EOPNOTSUPP; 1702 1703 return conduit->netdev_ops->ndo_setup_tc(conduit, TC_SETUP_FT, type_data); 1704 } 1705 1706 static int dsa_user_setup_tc(struct net_device *dev, enum tc_setup_type type, 1707 void *type_data) 1708 { 1709 struct dsa_port *dp = dsa_user_to_port(dev); 1710 struct dsa_switch *ds = dp->ds; 1711 1712 switch (type) { 1713 case TC_SETUP_BLOCK: 1714 return dsa_user_setup_tc_block(dev, type_data); 1715 case TC_SETUP_FT: 1716 return dsa_user_setup_ft_block(ds, dp->index, type_data); 1717 default: 1718 break; 1719 } 1720 1721 if (!ds->ops->port_setup_tc) 1722 return -EOPNOTSUPP; 1723 1724 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1725 } 1726 1727 static int dsa_user_get_rxnfc(struct net_device *dev, 1728 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1729 { 1730 struct dsa_port *dp = dsa_user_to_port(dev); 1731 struct dsa_switch *ds = dp->ds; 1732 1733 if (!ds->ops->get_rxnfc) 1734 return -EOPNOTSUPP; 1735 1736 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1737 } 1738 1739 static int dsa_user_set_rxnfc(struct net_device *dev, 1740 struct ethtool_rxnfc *nfc) 1741 { 1742 struct dsa_port *dp = dsa_user_to_port(dev); 1743 struct dsa_switch *ds = dp->ds; 1744 1745 if (!ds->ops->set_rxnfc) 1746 return -EOPNOTSUPP; 1747 1748 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1749 } 1750 1751 static int dsa_user_get_ts_info(struct net_device *dev, 1752 struct kernel_ethtool_ts_info *ts) 1753 { 1754 struct dsa_user_priv *p = netdev_priv(dev); 1755 struct dsa_switch *ds = p->dp->ds; 1756 1757 if (!ds->ops->get_ts_info) 1758 return -EOPNOTSUPP; 1759 1760 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1761 } 1762 1763 static int dsa_user_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1764 u16 vid) 1765 { 1766 struct dsa_port *dp = dsa_user_to_port(dev); 1767 struct switchdev_obj_port_vlan vlan = { 1768 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1769 .vid = vid, 1770 /* This API only allows programming tagged, non-PVID VIDs */ 1771 .flags = 0, 1772 }; 1773 struct netlink_ext_ack extack = {0}; 1774 struct dsa_switch *ds = dp->ds; 1775 struct netdev_hw_addr *ha; 1776 struct dsa_vlan *v; 1777 int ret; 1778 1779 /* User port... */ 1780 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1781 if (ret) { 1782 if (extack._msg) 1783 netdev_err(dev, "%s\n", extack._msg); 1784 return ret; 1785 } 1786 1787 /* And CPU port... */ 1788 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1789 if (ret) { 1790 if (extack._msg) 1791 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1792 extack._msg); 1793 return ret; 1794 } 1795 1796 if (!dsa_switch_supports_uc_filtering(ds) && 1797 !dsa_switch_supports_mc_filtering(ds)) 1798 return 0; 1799 1800 v = kzalloc(sizeof(*v), GFP_KERNEL); 1801 if (!v) { 1802 ret = -ENOMEM; 1803 goto rollback; 1804 } 1805 1806 netif_addr_lock_bh(dev); 1807 1808 v->vid = vid; 1809 list_add_tail(&v->list, &dp->user_vlans); 1810 1811 if (dsa_switch_supports_mc_filtering(ds)) { 1812 netdev_for_each_synced_mc_addr(ha, dev) { 1813 dsa_user_schedule_standalone_work(dev, DSA_MC_ADD, 1814 ha->addr, vid); 1815 } 1816 } 1817 1818 if (dsa_switch_supports_uc_filtering(ds)) { 1819 netdev_for_each_synced_uc_addr(ha, dev) { 1820 dsa_user_schedule_standalone_work(dev, DSA_UC_ADD, 1821 ha->addr, vid); 1822 } 1823 } 1824 1825 netif_addr_unlock_bh(dev); 1826 1827 dsa_flush_workqueue(); 1828 1829 return 0; 1830 1831 rollback: 1832 dsa_port_host_vlan_del(dp, &vlan); 1833 dsa_port_vlan_del(dp, &vlan); 1834 1835 return ret; 1836 } 1837 1838 static int dsa_user_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1839 u16 vid) 1840 { 1841 struct dsa_port *dp = dsa_user_to_port(dev); 1842 struct switchdev_obj_port_vlan vlan = { 1843 .vid = vid, 1844 /* This API only allows programming tagged, non-PVID VIDs */ 1845 .flags = 0, 1846 }; 1847 struct dsa_switch *ds = dp->ds; 1848 struct netdev_hw_addr *ha; 1849 struct dsa_vlan *v; 1850 int err; 1851 1852 err = dsa_port_vlan_del(dp, &vlan); 1853 if (err) 1854 return err; 1855 1856 err = dsa_port_host_vlan_del(dp, &vlan); 1857 if (err) 1858 return err; 1859 1860 if (!dsa_switch_supports_uc_filtering(ds) && 1861 !dsa_switch_supports_mc_filtering(ds)) 1862 return 0; 1863 1864 netif_addr_lock_bh(dev); 1865 1866 v = dsa_vlan_find(&dp->user_vlans, &vlan); 1867 if (!v) { 1868 netif_addr_unlock_bh(dev); 1869 return -ENOENT; 1870 } 1871 1872 list_del(&v->list); 1873 kfree(v); 1874 1875 if (dsa_switch_supports_mc_filtering(ds)) { 1876 netdev_for_each_synced_mc_addr(ha, dev) { 1877 dsa_user_schedule_standalone_work(dev, DSA_MC_DEL, 1878 ha->addr, vid); 1879 } 1880 } 1881 1882 if (dsa_switch_supports_uc_filtering(ds)) { 1883 netdev_for_each_synced_uc_addr(ha, dev) { 1884 dsa_user_schedule_standalone_work(dev, DSA_UC_DEL, 1885 ha->addr, vid); 1886 } 1887 } 1888 1889 netif_addr_unlock_bh(dev); 1890 1891 dsa_flush_workqueue(); 1892 1893 return 0; 1894 } 1895 1896 static int dsa_user_restore_vlan(struct net_device *vdev, int vid, void *arg) 1897 { 1898 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1899 1900 return dsa_user_vlan_rx_add_vid(arg, proto, vid); 1901 } 1902 1903 static int dsa_user_clear_vlan(struct net_device *vdev, int vid, void *arg) 1904 { 1905 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1906 1907 return dsa_user_vlan_rx_kill_vid(arg, proto, vid); 1908 } 1909 1910 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1911 * filtering is enabled. The baseline is that only ports that offload a 1912 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1913 * but there are exceptions for quirky hardware. 1914 * 1915 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1916 * the same switch with other ports that offload a VLAN-aware bridge are also 1917 * inevitably VLAN-aware. 1918 * 1919 * To summarize, a DSA switch port offloads: 1920 * 1921 * - If standalone (this includes software bridge, software LAG): 1922 * - if ds->needs_standalone_vlan_filtering = true, OR if 1923 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1924 * this switch chip which have vlan_filtering=1) 1925 * - the 8021q upper VLANs 1926 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1927 * global, or it is, but no port is under a VLAN-aware bridge): 1928 * - no VLAN (any 8021q upper is a software VLAN) 1929 * 1930 * - If under a vlan_filtering=0 bridge which it offload: 1931 * - if ds->configure_vlan_while_not_filtering = true (default): 1932 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1933 * - else (deprecated): 1934 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1935 * enabled, so this behavior is broken and discouraged. 1936 * 1937 * - If under a vlan_filtering=1 bridge which it offload: 1938 * - the bridge VLANs 1939 * - the 8021q upper VLANs 1940 */ 1941 int dsa_user_manage_vlan_filtering(struct net_device *user, 1942 bool vlan_filtering) 1943 { 1944 int err; 1945 1946 if (vlan_filtering) { 1947 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1948 1949 err = vlan_for_each(user, dsa_user_restore_vlan, user); 1950 if (err) { 1951 vlan_for_each(user, dsa_user_clear_vlan, user); 1952 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1953 return err; 1954 } 1955 } else { 1956 err = vlan_for_each(user, dsa_user_clear_vlan, user); 1957 if (err) 1958 return err; 1959 1960 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1961 } 1962 1963 return 0; 1964 } 1965 1966 struct dsa_hw_port { 1967 struct list_head list; 1968 struct net_device *dev; 1969 int old_mtu; 1970 }; 1971 1972 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1973 { 1974 const struct dsa_hw_port *p; 1975 int err; 1976 1977 list_for_each_entry(p, hw_port_list, list) { 1978 if (p->dev->mtu == mtu) 1979 continue; 1980 1981 err = dev_set_mtu(p->dev, mtu); 1982 if (err) 1983 goto rollback; 1984 } 1985 1986 return 0; 1987 1988 rollback: 1989 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1990 if (p->dev->mtu == p->old_mtu) 1991 continue; 1992 1993 if (dev_set_mtu(p->dev, p->old_mtu)) 1994 netdev_err(p->dev, "Failed to restore MTU\n"); 1995 } 1996 1997 return err; 1998 } 1999 2000 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 2001 { 2002 struct dsa_hw_port *p, *n; 2003 2004 list_for_each_entry_safe(p, n, hw_port_list, list) 2005 kfree(p); 2006 } 2007 2008 /* Make the hardware datapath to/from @dev limited to a common MTU */ 2009 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 2010 { 2011 struct list_head hw_port_list; 2012 struct dsa_switch_tree *dst; 2013 int min_mtu = ETH_MAX_MTU; 2014 struct dsa_port *other_dp; 2015 int err; 2016 2017 if (!dp->ds->mtu_enforcement_ingress) 2018 return; 2019 2020 if (!dp->bridge) 2021 return; 2022 2023 INIT_LIST_HEAD(&hw_port_list); 2024 2025 /* Populate the list of ports that are part of the same bridge 2026 * as the newly added/modified port 2027 */ 2028 list_for_each_entry(dst, &dsa_tree_list, list) { 2029 list_for_each_entry(other_dp, &dst->ports, list) { 2030 struct dsa_hw_port *hw_port; 2031 struct net_device *user; 2032 2033 if (other_dp->type != DSA_PORT_TYPE_USER) 2034 continue; 2035 2036 if (!dsa_port_bridge_same(dp, other_dp)) 2037 continue; 2038 2039 if (!other_dp->ds->mtu_enforcement_ingress) 2040 continue; 2041 2042 user = other_dp->user; 2043 2044 if (min_mtu > user->mtu) 2045 min_mtu = user->mtu; 2046 2047 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 2048 if (!hw_port) 2049 goto out; 2050 2051 hw_port->dev = user; 2052 hw_port->old_mtu = user->mtu; 2053 2054 list_add(&hw_port->list, &hw_port_list); 2055 } 2056 } 2057 2058 /* Attempt to configure the entire hardware bridge to the newly added 2059 * interface's MTU first, regardless of whether the intention of the 2060 * user was to raise or lower it. 2061 */ 2062 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->user->mtu); 2063 if (!err) 2064 goto out; 2065 2066 /* Clearly that didn't work out so well, so just set the minimum MTU on 2067 * all hardware bridge ports now. If this fails too, then all ports will 2068 * still have their old MTU rolled back anyway. 2069 */ 2070 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 2071 2072 out: 2073 dsa_hw_port_list_free(&hw_port_list); 2074 } 2075 2076 int dsa_user_change_mtu(struct net_device *dev, int new_mtu) 2077 { 2078 struct net_device *conduit = dsa_user_to_conduit(dev); 2079 struct dsa_port *dp = dsa_user_to_port(dev); 2080 struct dsa_port *cpu_dp = dp->cpu_dp; 2081 struct dsa_switch *ds = dp->ds; 2082 struct dsa_port *other_dp; 2083 int largest_mtu = 0; 2084 int new_conduit_mtu; 2085 int old_conduit_mtu; 2086 int mtu_limit; 2087 int overhead; 2088 int cpu_mtu; 2089 int err; 2090 2091 if (!ds->ops->port_change_mtu) 2092 return -EOPNOTSUPP; 2093 2094 dsa_tree_for_each_user_port(other_dp, ds->dst) { 2095 int user_mtu; 2096 2097 /* During probe, this function will be called for each user 2098 * device, while not all of them have been allocated. That's 2099 * ok, it doesn't change what the maximum is, so ignore it. 2100 */ 2101 if (!other_dp->user) 2102 continue; 2103 2104 /* Pretend that we already applied the setting, which we 2105 * actually haven't (still haven't done all integrity checks) 2106 */ 2107 if (dp == other_dp) 2108 user_mtu = new_mtu; 2109 else 2110 user_mtu = other_dp->user->mtu; 2111 2112 if (largest_mtu < user_mtu) 2113 largest_mtu = user_mtu; 2114 } 2115 2116 overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops); 2117 mtu_limit = min_t(int, conduit->max_mtu, dev->max_mtu + overhead); 2118 old_conduit_mtu = conduit->mtu; 2119 new_conduit_mtu = largest_mtu + overhead; 2120 if (new_conduit_mtu > mtu_limit) 2121 return -ERANGE; 2122 2123 /* If the conduit MTU isn't over limit, there's no need to check the CPU 2124 * MTU, since that surely isn't either. 2125 */ 2126 cpu_mtu = largest_mtu; 2127 2128 /* Start applying stuff */ 2129 if (new_conduit_mtu != old_conduit_mtu) { 2130 err = dev_set_mtu(conduit, new_conduit_mtu); 2131 if (err < 0) 2132 goto out_conduit_failed; 2133 2134 /* We only need to propagate the MTU of the CPU port to 2135 * upstream switches, so emit a notifier which updates them. 2136 */ 2137 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 2138 if (err) 2139 goto out_cpu_failed; 2140 } 2141 2142 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 2143 if (err) 2144 goto out_port_failed; 2145 2146 WRITE_ONCE(dev->mtu, new_mtu); 2147 2148 dsa_bridge_mtu_normalization(dp); 2149 2150 return 0; 2151 2152 out_port_failed: 2153 if (new_conduit_mtu != old_conduit_mtu) 2154 dsa_port_mtu_change(cpu_dp, old_conduit_mtu - overhead); 2155 out_cpu_failed: 2156 if (new_conduit_mtu != old_conduit_mtu) 2157 dev_set_mtu(conduit, old_conduit_mtu); 2158 out_conduit_failed: 2159 return err; 2160 } 2161 2162 static int __maybe_unused 2163 dsa_user_dcbnl_set_apptrust(struct net_device *dev, u8 *sel, int nsel) 2164 { 2165 struct dsa_port *dp = dsa_user_to_port(dev); 2166 struct dsa_switch *ds = dp->ds; 2167 int port = dp->index; 2168 2169 if (!ds->ops->port_set_apptrust) 2170 return -EOPNOTSUPP; 2171 2172 return ds->ops->port_set_apptrust(ds, port, sel, nsel); 2173 } 2174 2175 static int __maybe_unused 2176 dsa_user_dcbnl_get_apptrust(struct net_device *dev, u8 *sel, int *nsel) 2177 { 2178 struct dsa_port *dp = dsa_user_to_port(dev); 2179 struct dsa_switch *ds = dp->ds; 2180 int port = dp->index; 2181 2182 if (!ds->ops->port_get_apptrust) 2183 return -EOPNOTSUPP; 2184 2185 return ds->ops->port_get_apptrust(ds, port, sel, nsel); 2186 } 2187 2188 static int __maybe_unused 2189 dsa_user_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 2190 { 2191 struct dsa_port *dp = dsa_user_to_port(dev); 2192 struct dsa_switch *ds = dp->ds; 2193 unsigned long mask, new_prio; 2194 int err, port = dp->index; 2195 2196 if (!ds->ops->port_set_default_prio) 2197 return -EOPNOTSUPP; 2198 2199 err = dcb_ieee_setapp(dev, app); 2200 if (err) 2201 return err; 2202 2203 mask = dcb_ieee_getapp_mask(dev, app); 2204 new_prio = __fls(mask); 2205 2206 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2207 if (err) { 2208 dcb_ieee_delapp(dev, app); 2209 return err; 2210 } 2211 2212 return 0; 2213 } 2214 2215 /* Update the DSCP prio entries on all user ports of the switch in case 2216 * the switch supports global DSCP prio instead of per port DSCP prios. 2217 */ 2218 static int dsa_user_dcbnl_ieee_global_dscp_setdel(struct net_device *dev, 2219 struct dcb_app *app, bool del) 2220 { 2221 int (*setdel)(struct net_device *dev, struct dcb_app *app); 2222 struct dsa_port *dp = dsa_user_to_port(dev); 2223 struct dsa_switch *ds = dp->ds; 2224 struct dsa_port *other_dp; 2225 int err, restore_err; 2226 2227 if (del) 2228 setdel = dcb_ieee_delapp; 2229 else 2230 setdel = dcb_ieee_setapp; 2231 2232 dsa_switch_for_each_user_port(other_dp, ds) { 2233 struct net_device *user = other_dp->user; 2234 2235 if (!user || user == dev) 2236 continue; 2237 2238 err = setdel(user, app); 2239 if (err) 2240 goto err_try_to_restore; 2241 } 2242 2243 return 0; 2244 2245 err_try_to_restore: 2246 2247 /* Revert logic to restore previous state of app entries */ 2248 if (!del) 2249 setdel = dcb_ieee_delapp; 2250 else 2251 setdel = dcb_ieee_setapp; 2252 2253 dsa_switch_for_each_user_port_continue_reverse(other_dp, ds) { 2254 struct net_device *user = other_dp->user; 2255 2256 if (!user || user == dev) 2257 continue; 2258 2259 restore_err = setdel(user, app); 2260 if (restore_err) 2261 netdev_err(user, "Failed to restore DSCP prio entry configuration\n"); 2262 } 2263 2264 return err; 2265 } 2266 2267 static int __maybe_unused 2268 dsa_user_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 2269 { 2270 struct dsa_port *dp = dsa_user_to_port(dev); 2271 struct dsa_switch *ds = dp->ds; 2272 unsigned long mask, new_prio; 2273 int err, port = dp->index; 2274 u8 dscp = app->protocol; 2275 2276 if (!ds->ops->port_add_dscp_prio) 2277 return -EOPNOTSUPP; 2278 2279 if (dscp >= 64) { 2280 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 2281 dscp); 2282 return -EINVAL; 2283 } 2284 2285 err = dcb_ieee_setapp(dev, app); 2286 if (err) 2287 return err; 2288 2289 mask = dcb_ieee_getapp_mask(dev, app); 2290 new_prio = __fls(mask); 2291 2292 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 2293 if (err) { 2294 dcb_ieee_delapp(dev, app); 2295 return err; 2296 } 2297 2298 if (!ds->dscp_prio_mapping_is_global) 2299 return 0; 2300 2301 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, false); 2302 if (err) { 2303 if (ds->ops->port_del_dscp_prio) 2304 ds->ops->port_del_dscp_prio(ds, port, dscp, new_prio); 2305 dcb_ieee_delapp(dev, app); 2306 return err; 2307 } 2308 2309 return 0; 2310 } 2311 2312 static int __maybe_unused dsa_user_dcbnl_ieee_setapp(struct net_device *dev, 2313 struct dcb_app *app) 2314 { 2315 switch (app->selector) { 2316 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2317 switch (app->protocol) { 2318 case 0: 2319 return dsa_user_dcbnl_set_default_prio(dev, app); 2320 default: 2321 return -EOPNOTSUPP; 2322 } 2323 break; 2324 case IEEE_8021QAZ_APP_SEL_DSCP: 2325 return dsa_user_dcbnl_add_dscp_prio(dev, app); 2326 default: 2327 return -EOPNOTSUPP; 2328 } 2329 } 2330 2331 static int __maybe_unused 2332 dsa_user_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2333 { 2334 struct dsa_port *dp = dsa_user_to_port(dev); 2335 struct dsa_switch *ds = dp->ds; 2336 unsigned long mask, new_prio; 2337 int err, port = dp->index; 2338 2339 if (!ds->ops->port_set_default_prio) 2340 return -EOPNOTSUPP; 2341 2342 err = dcb_ieee_delapp(dev, app); 2343 if (err) 2344 return err; 2345 2346 mask = dcb_ieee_getapp_mask(dev, app); 2347 new_prio = mask ? __fls(mask) : 0; 2348 2349 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2350 if (err) { 2351 dcb_ieee_setapp(dev, app); 2352 return err; 2353 } 2354 2355 return 0; 2356 } 2357 2358 static int __maybe_unused 2359 dsa_user_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2360 { 2361 struct dsa_port *dp = dsa_user_to_port(dev); 2362 struct dsa_switch *ds = dp->ds; 2363 int err, port = dp->index; 2364 u8 dscp = app->protocol; 2365 2366 if (!ds->ops->port_del_dscp_prio) 2367 return -EOPNOTSUPP; 2368 2369 err = dcb_ieee_delapp(dev, app); 2370 if (err) 2371 return err; 2372 2373 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2374 if (err) { 2375 dcb_ieee_setapp(dev, app); 2376 return err; 2377 } 2378 2379 if (!ds->dscp_prio_mapping_is_global) 2380 return 0; 2381 2382 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, true); 2383 if (err) { 2384 if (ds->ops->port_add_dscp_prio) 2385 ds->ops->port_add_dscp_prio(ds, port, dscp, 2386 app->priority); 2387 dcb_ieee_setapp(dev, app); 2388 return err; 2389 } 2390 2391 return 0; 2392 } 2393 2394 static int __maybe_unused dsa_user_dcbnl_ieee_delapp(struct net_device *dev, 2395 struct dcb_app *app) 2396 { 2397 switch (app->selector) { 2398 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2399 switch (app->protocol) { 2400 case 0: 2401 return dsa_user_dcbnl_del_default_prio(dev, app); 2402 default: 2403 return -EOPNOTSUPP; 2404 } 2405 break; 2406 case IEEE_8021QAZ_APP_SEL_DSCP: 2407 return dsa_user_dcbnl_del_dscp_prio(dev, app); 2408 default: 2409 return -EOPNOTSUPP; 2410 } 2411 } 2412 2413 /* Pre-populate the DCB application priority table with the priorities 2414 * configured during switch setup, which we read from hardware here. 2415 */ 2416 static int dsa_user_dcbnl_init(struct net_device *dev) 2417 { 2418 struct dsa_port *dp = dsa_user_to_port(dev); 2419 struct dsa_switch *ds = dp->ds; 2420 int port = dp->index; 2421 int err; 2422 2423 if (ds->ops->port_get_default_prio) { 2424 int prio = ds->ops->port_get_default_prio(ds, port); 2425 struct dcb_app app = { 2426 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2427 .protocol = 0, 2428 .priority = prio, 2429 }; 2430 2431 if (prio < 0) 2432 return prio; 2433 2434 err = dcb_ieee_setapp(dev, &app); 2435 if (err) 2436 return err; 2437 } 2438 2439 if (ds->ops->port_get_dscp_prio) { 2440 int protocol; 2441 2442 for (protocol = 0; protocol < 64; protocol++) { 2443 struct dcb_app app = { 2444 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2445 .protocol = protocol, 2446 }; 2447 int prio; 2448 2449 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2450 if (prio == -EOPNOTSUPP) 2451 continue; 2452 if (prio < 0) 2453 return prio; 2454 2455 app.priority = prio; 2456 2457 err = dcb_ieee_setapp(dev, &app); 2458 if (err) 2459 return err; 2460 } 2461 } 2462 2463 return 0; 2464 } 2465 2466 static const struct ethtool_ops dsa_user_ethtool_ops = { 2467 .get_drvinfo = dsa_user_get_drvinfo, 2468 .get_regs_len = dsa_user_get_regs_len, 2469 .get_regs = dsa_user_get_regs, 2470 .nway_reset = dsa_user_nway_reset, 2471 .get_link = ethtool_op_get_link, 2472 .get_eeprom_len = dsa_user_get_eeprom_len, 2473 .get_eeprom = dsa_user_get_eeprom, 2474 .set_eeprom = dsa_user_set_eeprom, 2475 .get_strings = dsa_user_get_strings, 2476 .get_ethtool_stats = dsa_user_get_ethtool_stats, 2477 .get_sset_count = dsa_user_get_sset_count, 2478 .get_eth_phy_stats = dsa_user_get_eth_phy_stats, 2479 .get_eth_mac_stats = dsa_user_get_eth_mac_stats, 2480 .get_eth_ctrl_stats = dsa_user_get_eth_ctrl_stats, 2481 .get_rmon_stats = dsa_user_get_rmon_stats, 2482 .set_wol = dsa_user_set_wol, 2483 .get_wol = dsa_user_get_wol, 2484 .set_eee = dsa_user_set_eee, 2485 .get_eee = dsa_user_get_eee, 2486 .get_link_ksettings = dsa_user_get_link_ksettings, 2487 .set_link_ksettings = dsa_user_set_link_ksettings, 2488 .get_pause_stats = dsa_user_get_pause_stats, 2489 .get_pauseparam = dsa_user_get_pauseparam, 2490 .set_pauseparam = dsa_user_set_pauseparam, 2491 .get_rxnfc = dsa_user_get_rxnfc, 2492 .set_rxnfc = dsa_user_set_rxnfc, 2493 .get_ts_info = dsa_user_get_ts_info, 2494 .self_test = dsa_user_net_selftest, 2495 .get_mm = dsa_user_get_mm, 2496 .set_mm = dsa_user_set_mm, 2497 .get_mm_stats = dsa_user_get_mm_stats, 2498 }; 2499 2500 static const struct dcbnl_rtnl_ops __maybe_unused dsa_user_dcbnl_ops = { 2501 .ieee_setapp = dsa_user_dcbnl_ieee_setapp, 2502 .ieee_delapp = dsa_user_dcbnl_ieee_delapp, 2503 .dcbnl_setapptrust = dsa_user_dcbnl_set_apptrust, 2504 .dcbnl_getapptrust = dsa_user_dcbnl_get_apptrust, 2505 }; 2506 2507 static void dsa_user_get_stats64(struct net_device *dev, 2508 struct rtnl_link_stats64 *s) 2509 { 2510 struct dsa_port *dp = dsa_user_to_port(dev); 2511 struct dsa_switch *ds = dp->ds; 2512 2513 if (ds->ops->get_stats64) 2514 ds->ops->get_stats64(ds, dp->index, s); 2515 else 2516 dev_get_tstats64(dev, s); 2517 } 2518 2519 static int dsa_user_fill_forward_path(struct net_device_path_ctx *ctx, 2520 struct net_device_path *path) 2521 { 2522 struct dsa_port *dp = dsa_user_to_port(ctx->dev); 2523 struct net_device *conduit = dsa_port_to_conduit(dp); 2524 struct dsa_port *cpu_dp = dp->cpu_dp; 2525 2526 path->dev = ctx->dev; 2527 path->type = DEV_PATH_DSA; 2528 path->dsa.proto = cpu_dp->tag_ops->proto; 2529 path->dsa.port = dp->index; 2530 ctx->dev = conduit; 2531 2532 return 0; 2533 } 2534 2535 static const struct net_device_ops dsa_user_netdev_ops = { 2536 .ndo_open = dsa_user_open, 2537 .ndo_stop = dsa_user_close, 2538 .ndo_start_xmit = dsa_user_xmit, 2539 .ndo_change_rx_flags = dsa_user_change_rx_flags, 2540 .ndo_set_rx_mode = dsa_user_set_rx_mode, 2541 .ndo_set_mac_address = dsa_user_set_mac_address, 2542 .ndo_fdb_dump = dsa_user_fdb_dump, 2543 .ndo_eth_ioctl = dsa_user_ioctl, 2544 .ndo_get_iflink = dsa_user_get_iflink, 2545 #ifdef CONFIG_NET_POLL_CONTROLLER 2546 .ndo_netpoll_setup = dsa_user_netpoll_setup, 2547 .ndo_netpoll_cleanup = dsa_user_netpoll_cleanup, 2548 .ndo_poll_controller = dsa_user_poll_controller, 2549 #endif 2550 .ndo_setup_tc = dsa_user_setup_tc, 2551 .ndo_get_stats64 = dsa_user_get_stats64, 2552 .ndo_vlan_rx_add_vid = dsa_user_vlan_rx_add_vid, 2553 .ndo_vlan_rx_kill_vid = dsa_user_vlan_rx_kill_vid, 2554 .ndo_change_mtu = dsa_user_change_mtu, 2555 .ndo_fill_forward_path = dsa_user_fill_forward_path, 2556 }; 2557 2558 static const struct device_type dsa_type = { 2559 .name = "dsa", 2560 }; 2561 2562 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2563 { 2564 const struct dsa_port *dp = dsa_to_port(ds, port); 2565 2566 if (dp->pl) 2567 phylink_mac_change(dp->pl, up); 2568 } 2569 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2570 2571 static void dsa_user_phylink_fixed_state(struct phylink_config *config, 2572 struct phylink_link_state *state) 2573 { 2574 struct dsa_port *dp = dsa_phylink_to_port(config); 2575 struct dsa_switch *ds = dp->ds; 2576 2577 /* No need to check that this operation is valid, the callback would 2578 * not be called if it was not. 2579 */ 2580 ds->ops->phylink_fixed_state(ds, dp->index, state); 2581 } 2582 2583 /* user device setup *******************************************************/ 2584 static int dsa_user_phy_connect(struct net_device *user_dev, int addr, 2585 u32 flags) 2586 { 2587 struct dsa_port *dp = dsa_user_to_port(user_dev); 2588 struct dsa_switch *ds = dp->ds; 2589 2590 user_dev->phydev = mdiobus_get_phy(ds->user_mii_bus, addr); 2591 if (!user_dev->phydev) { 2592 netdev_err(user_dev, "no phy at %d\n", addr); 2593 return -ENODEV; 2594 } 2595 2596 user_dev->phydev->dev_flags |= flags; 2597 2598 return phylink_connect_phy(dp->pl, user_dev->phydev); 2599 } 2600 2601 static int dsa_user_phy_setup(struct net_device *user_dev) 2602 { 2603 struct dsa_port *dp = dsa_user_to_port(user_dev); 2604 struct device_node *port_dn = dp->dn; 2605 struct dsa_switch *ds = dp->ds; 2606 u32 phy_flags = 0; 2607 int ret; 2608 2609 dp->pl_config.dev = &user_dev->dev; 2610 dp->pl_config.type = PHYLINK_NETDEV; 2611 2612 /* The get_fixed_state callback takes precedence over polling the 2613 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2614 * this if the switch provides such a callback. 2615 */ 2616 if (ds->ops->phylink_fixed_state) { 2617 dp->pl_config.get_fixed_state = dsa_user_phylink_fixed_state; 2618 dp->pl_config.poll_fixed_state = true; 2619 } 2620 2621 ret = dsa_port_phylink_create(dp); 2622 if (ret) 2623 return ret; 2624 2625 if (ds->ops->get_phy_flags) 2626 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2627 2628 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2629 if (ret == -ENODEV && ds->user_mii_bus) { 2630 /* We could not connect to a designated PHY or SFP, so try to 2631 * use the switch internal MDIO bus instead 2632 */ 2633 ret = dsa_user_phy_connect(user_dev, dp->index, phy_flags); 2634 } 2635 if (ret) { 2636 netdev_err(user_dev, "failed to connect to PHY: %pe\n", 2637 ERR_PTR(ret)); 2638 dsa_port_phylink_destroy(dp); 2639 } 2640 2641 return ret; 2642 } 2643 2644 void dsa_user_setup_tagger(struct net_device *user) 2645 { 2646 struct dsa_port *dp = dsa_user_to_port(user); 2647 struct net_device *conduit = dsa_port_to_conduit(dp); 2648 struct dsa_user_priv *p = netdev_priv(user); 2649 const struct dsa_port *cpu_dp = dp->cpu_dp; 2650 const struct dsa_switch *ds = dp->ds; 2651 2652 user->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2653 user->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2654 /* Try to save one extra realloc later in the TX path (in the conduit) 2655 * by also inheriting the conduit's needed headroom and tailroom. 2656 * The 8021q driver also does this. 2657 */ 2658 user->needed_headroom += conduit->needed_headroom; 2659 user->needed_tailroom += conduit->needed_tailroom; 2660 2661 p->xmit = cpu_dp->tag_ops->xmit; 2662 2663 user->features = conduit->vlan_features | NETIF_F_HW_TC; 2664 user->hw_features |= NETIF_F_HW_TC; 2665 if (user->needed_tailroom) 2666 user->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2667 if (ds->needs_standalone_vlan_filtering) 2668 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2669 2670 user->lltx = true; 2671 } 2672 2673 int dsa_user_suspend(struct net_device *user_dev) 2674 { 2675 struct dsa_port *dp = dsa_user_to_port(user_dev); 2676 2677 if (!netif_running(user_dev)) 2678 return 0; 2679 2680 netif_device_detach(user_dev); 2681 2682 rtnl_lock(); 2683 phylink_stop(dp->pl); 2684 rtnl_unlock(); 2685 2686 return 0; 2687 } 2688 2689 int dsa_user_resume(struct net_device *user_dev) 2690 { 2691 struct dsa_port *dp = dsa_user_to_port(user_dev); 2692 2693 if (!netif_running(user_dev)) 2694 return 0; 2695 2696 netif_device_attach(user_dev); 2697 2698 rtnl_lock(); 2699 phylink_start(dp->pl); 2700 rtnl_unlock(); 2701 2702 return 0; 2703 } 2704 2705 int dsa_user_create(struct dsa_port *port) 2706 { 2707 struct net_device *conduit = dsa_port_to_conduit(port); 2708 struct dsa_switch *ds = port->ds; 2709 struct net_device *user_dev; 2710 struct dsa_user_priv *p; 2711 const char *name; 2712 int assign_type; 2713 int ret; 2714 2715 if (!ds->num_tx_queues) 2716 ds->num_tx_queues = 1; 2717 2718 if (port->name) { 2719 name = port->name; 2720 assign_type = NET_NAME_PREDICTABLE; 2721 } else { 2722 name = "eth%d"; 2723 assign_type = NET_NAME_ENUM; 2724 } 2725 2726 user_dev = alloc_netdev_mqs(sizeof(struct dsa_user_priv), name, 2727 assign_type, ether_setup, 2728 ds->num_tx_queues, 1); 2729 if (user_dev == NULL) 2730 return -ENOMEM; 2731 2732 user_dev->rtnl_link_ops = &dsa_link_ops; 2733 user_dev->ethtool_ops = &dsa_user_ethtool_ops; 2734 #if IS_ENABLED(CONFIG_DCB) 2735 user_dev->dcbnl_ops = &dsa_user_dcbnl_ops; 2736 #endif 2737 if (!is_zero_ether_addr(port->mac)) 2738 eth_hw_addr_set(user_dev, port->mac); 2739 else 2740 eth_hw_addr_inherit(user_dev, conduit); 2741 user_dev->priv_flags |= IFF_NO_QUEUE; 2742 if (dsa_switch_supports_uc_filtering(ds)) 2743 user_dev->priv_flags |= IFF_UNICAST_FLT; 2744 user_dev->netdev_ops = &dsa_user_netdev_ops; 2745 if (ds->ops->port_max_mtu) 2746 user_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2747 SET_NETDEV_DEVTYPE(user_dev, &dsa_type); 2748 2749 SET_NETDEV_DEV(user_dev, port->ds->dev); 2750 SET_NETDEV_DEVLINK_PORT(user_dev, &port->devlink_port); 2751 user_dev->dev.of_node = port->dn; 2752 user_dev->vlan_features = conduit->vlan_features; 2753 2754 p = netdev_priv(user_dev); 2755 user_dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2756 2757 ret = gro_cells_init(&p->gcells, user_dev); 2758 if (ret) 2759 goto out_free; 2760 2761 p->dp = port; 2762 INIT_LIST_HEAD(&p->mall_tc_list); 2763 port->user = user_dev; 2764 dsa_user_setup_tagger(user_dev); 2765 2766 netif_carrier_off(user_dev); 2767 2768 ret = dsa_user_phy_setup(user_dev); 2769 if (ret) { 2770 netdev_err(user_dev, 2771 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2772 ret, ds->dst->index, ds->index, port->index); 2773 goto out_gcells; 2774 } 2775 2776 rtnl_lock(); 2777 2778 ret = dsa_user_change_mtu(user_dev, ETH_DATA_LEN); 2779 if (ret && ret != -EOPNOTSUPP) 2780 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2781 ret, ETH_DATA_LEN, port->index); 2782 2783 ret = register_netdevice(user_dev); 2784 if (ret) { 2785 netdev_err(conduit, "error %d registering interface %s\n", 2786 ret, user_dev->name); 2787 rtnl_unlock(); 2788 goto out_phy; 2789 } 2790 2791 if (IS_ENABLED(CONFIG_DCB)) { 2792 ret = dsa_user_dcbnl_init(user_dev); 2793 if (ret) { 2794 netdev_err(user_dev, 2795 "failed to initialize DCB: %pe\n", 2796 ERR_PTR(ret)); 2797 rtnl_unlock(); 2798 goto out_unregister; 2799 } 2800 } 2801 2802 ret = netdev_upper_dev_link(conduit, user_dev, NULL); 2803 2804 rtnl_unlock(); 2805 2806 if (ret) 2807 goto out_unregister; 2808 2809 return 0; 2810 2811 out_unregister: 2812 unregister_netdev(user_dev); 2813 out_phy: 2814 rtnl_lock(); 2815 phylink_disconnect_phy(p->dp->pl); 2816 rtnl_unlock(); 2817 dsa_port_phylink_destroy(p->dp); 2818 out_gcells: 2819 gro_cells_destroy(&p->gcells); 2820 out_free: 2821 free_netdev(user_dev); 2822 port->user = NULL; 2823 return ret; 2824 } 2825 2826 void dsa_user_destroy(struct net_device *user_dev) 2827 { 2828 struct net_device *conduit = dsa_user_to_conduit(user_dev); 2829 struct dsa_port *dp = dsa_user_to_port(user_dev); 2830 struct dsa_user_priv *p = netdev_priv(user_dev); 2831 2832 netif_carrier_off(user_dev); 2833 rtnl_lock(); 2834 netdev_upper_dev_unlink(conduit, user_dev); 2835 unregister_netdevice(user_dev); 2836 phylink_disconnect_phy(dp->pl); 2837 rtnl_unlock(); 2838 2839 dsa_port_phylink_destroy(dp); 2840 gro_cells_destroy(&p->gcells); 2841 free_netdev(user_dev); 2842 } 2843 2844 int dsa_user_change_conduit(struct net_device *dev, struct net_device *conduit, 2845 struct netlink_ext_ack *extack) 2846 { 2847 struct net_device *old_conduit = dsa_user_to_conduit(dev); 2848 struct dsa_port *dp = dsa_user_to_port(dev); 2849 struct dsa_switch *ds = dp->ds; 2850 struct net_device *upper; 2851 struct list_head *iter; 2852 int err; 2853 2854 if (conduit == old_conduit) 2855 return 0; 2856 2857 if (!ds->ops->port_change_conduit) { 2858 NL_SET_ERR_MSG_MOD(extack, 2859 "Driver does not support changing DSA conduit"); 2860 return -EOPNOTSUPP; 2861 } 2862 2863 if (!netdev_uses_dsa(conduit)) { 2864 NL_SET_ERR_MSG_MOD(extack, 2865 "Interface not eligible as DSA conduit"); 2866 return -EOPNOTSUPP; 2867 } 2868 2869 netdev_for_each_upper_dev_rcu(conduit, upper, iter) { 2870 if (dsa_user_dev_check(upper)) 2871 continue; 2872 if (netif_is_bridge_master(upper)) 2873 continue; 2874 NL_SET_ERR_MSG_MOD(extack, "Cannot join conduit with unknown uppers"); 2875 return -EOPNOTSUPP; 2876 } 2877 2878 /* Since we allow live-changing the DSA conduit, plus we auto-open the 2879 * DSA conduit when the user port opens => we need to ensure that the 2880 * new DSA conduit is open too. 2881 */ 2882 if (dev->flags & IFF_UP) { 2883 err = dev_open(conduit, extack); 2884 if (err) 2885 return err; 2886 } 2887 2888 netdev_upper_dev_unlink(old_conduit, dev); 2889 2890 err = netdev_upper_dev_link(conduit, dev, extack); 2891 if (err) 2892 goto out_revert_old_conduit_unlink; 2893 2894 err = dsa_port_change_conduit(dp, conduit, extack); 2895 if (err) 2896 goto out_revert_conduit_link; 2897 2898 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2899 err = dsa_user_change_mtu(dev, dev->mtu); 2900 if (err && err != -EOPNOTSUPP) { 2901 netdev_warn(dev, 2902 "nonfatal error updating MTU with new conduit: %pe\n", 2903 ERR_PTR(err)); 2904 } 2905 2906 return 0; 2907 2908 out_revert_conduit_link: 2909 netdev_upper_dev_unlink(conduit, dev); 2910 out_revert_old_conduit_unlink: 2911 netdev_upper_dev_link(old_conduit, dev, NULL); 2912 return err; 2913 } 2914 2915 bool dsa_user_dev_check(const struct net_device *dev) 2916 { 2917 return dev->netdev_ops == &dsa_user_netdev_ops; 2918 } 2919 EXPORT_SYMBOL_GPL(dsa_user_dev_check); 2920 2921 static int dsa_user_changeupper(struct net_device *dev, 2922 struct netdev_notifier_changeupper_info *info) 2923 { 2924 struct netlink_ext_ack *extack; 2925 int err = NOTIFY_DONE; 2926 struct dsa_port *dp; 2927 2928 if (!dsa_user_dev_check(dev)) 2929 return err; 2930 2931 dp = dsa_user_to_port(dev); 2932 extack = netdev_notifier_info_to_extack(&info->info); 2933 2934 if (netif_is_bridge_master(info->upper_dev)) { 2935 if (info->linking) { 2936 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2937 if (!err) 2938 dsa_bridge_mtu_normalization(dp); 2939 if (err == -EOPNOTSUPP) { 2940 NL_SET_ERR_MSG_WEAK_MOD(extack, 2941 "Offloading not supported"); 2942 err = 0; 2943 } 2944 err = notifier_from_errno(err); 2945 } else { 2946 dsa_port_bridge_leave(dp, info->upper_dev); 2947 err = NOTIFY_OK; 2948 } 2949 } else if (netif_is_lag_master(info->upper_dev)) { 2950 if (info->linking) { 2951 err = dsa_port_lag_join(dp, info->upper_dev, 2952 info->upper_info, extack); 2953 if (err == -EOPNOTSUPP) { 2954 NL_SET_ERR_MSG_WEAK_MOD(extack, 2955 "Offloading not supported"); 2956 err = 0; 2957 } 2958 err = notifier_from_errno(err); 2959 } else { 2960 dsa_port_lag_leave(dp, info->upper_dev); 2961 err = NOTIFY_OK; 2962 } 2963 } else if (is_hsr_master(info->upper_dev)) { 2964 if (info->linking) { 2965 err = dsa_port_hsr_join(dp, info->upper_dev, extack); 2966 if (err == -EOPNOTSUPP) { 2967 NL_SET_ERR_MSG_WEAK_MOD(extack, 2968 "Offloading not supported"); 2969 err = 0; 2970 } 2971 err = notifier_from_errno(err); 2972 } else { 2973 dsa_port_hsr_leave(dp, info->upper_dev); 2974 err = NOTIFY_OK; 2975 } 2976 } 2977 2978 return err; 2979 } 2980 2981 static int dsa_user_prechangeupper(struct net_device *dev, 2982 struct netdev_notifier_changeupper_info *info) 2983 { 2984 struct dsa_port *dp; 2985 2986 if (!dsa_user_dev_check(dev)) 2987 return NOTIFY_DONE; 2988 2989 dp = dsa_user_to_port(dev); 2990 2991 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2992 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2993 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2994 dsa_port_pre_lag_leave(dp, info->upper_dev); 2995 /* dsa_port_pre_hsr_leave is not yet necessary since hsr devices cannot 2996 * meaningfully placed under a bridge yet 2997 */ 2998 2999 return NOTIFY_DONE; 3000 } 3001 3002 static int 3003 dsa_user_lag_changeupper(struct net_device *dev, 3004 struct netdev_notifier_changeupper_info *info) 3005 { 3006 struct net_device *lower; 3007 struct list_head *iter; 3008 int err = NOTIFY_DONE; 3009 struct dsa_port *dp; 3010 3011 if (!netif_is_lag_master(dev)) 3012 return err; 3013 3014 netdev_for_each_lower_dev(dev, lower, iter) { 3015 if (!dsa_user_dev_check(lower)) 3016 continue; 3017 3018 dp = dsa_user_to_port(lower); 3019 if (!dp->lag) 3020 /* Software LAG */ 3021 continue; 3022 3023 err = dsa_user_changeupper(lower, info); 3024 if (notifier_to_errno(err)) 3025 break; 3026 } 3027 3028 return err; 3029 } 3030 3031 /* Same as dsa_user_lag_changeupper() except that it calls 3032 * dsa_user_prechangeupper() 3033 */ 3034 static int 3035 dsa_user_lag_prechangeupper(struct net_device *dev, 3036 struct netdev_notifier_changeupper_info *info) 3037 { 3038 struct net_device *lower; 3039 struct list_head *iter; 3040 int err = NOTIFY_DONE; 3041 struct dsa_port *dp; 3042 3043 if (!netif_is_lag_master(dev)) 3044 return err; 3045 3046 netdev_for_each_lower_dev(dev, lower, iter) { 3047 if (!dsa_user_dev_check(lower)) 3048 continue; 3049 3050 dp = dsa_user_to_port(lower); 3051 if (!dp->lag) 3052 /* Software LAG */ 3053 continue; 3054 3055 err = dsa_user_prechangeupper(lower, info); 3056 if (notifier_to_errno(err)) 3057 break; 3058 } 3059 3060 return err; 3061 } 3062 3063 static int 3064 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 3065 struct netdev_notifier_changeupper_info *info) 3066 { 3067 struct netlink_ext_ack *ext_ack; 3068 struct net_device *user, *br; 3069 struct dsa_port *dp; 3070 3071 ext_ack = netdev_notifier_info_to_extack(&info->info); 3072 3073 if (!is_vlan_dev(dev)) 3074 return NOTIFY_DONE; 3075 3076 user = vlan_dev_real_dev(dev); 3077 if (!dsa_user_dev_check(user)) 3078 return NOTIFY_DONE; 3079 3080 dp = dsa_user_to_port(user); 3081 br = dsa_port_bridge_dev_get(dp); 3082 if (!br) 3083 return NOTIFY_DONE; 3084 3085 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 3086 if (br_vlan_enabled(br) && 3087 netif_is_bridge_master(info->upper_dev) && info->linking) { 3088 NL_SET_ERR_MSG_MOD(ext_ack, 3089 "Cannot make VLAN device join VLAN-aware bridge"); 3090 return notifier_from_errno(-EINVAL); 3091 } 3092 3093 return NOTIFY_DONE; 3094 } 3095 3096 static int 3097 dsa_user_check_8021q_upper(struct net_device *dev, 3098 struct netdev_notifier_changeupper_info *info) 3099 { 3100 struct dsa_port *dp = dsa_user_to_port(dev); 3101 struct net_device *br = dsa_port_bridge_dev_get(dp); 3102 struct bridge_vlan_info br_info; 3103 struct netlink_ext_ack *extack; 3104 int err = NOTIFY_DONE; 3105 u16 vid; 3106 3107 if (!br || !br_vlan_enabled(br)) 3108 return NOTIFY_DONE; 3109 3110 extack = netdev_notifier_info_to_extack(&info->info); 3111 vid = vlan_dev_vlan_id(info->upper_dev); 3112 3113 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 3114 * device, respectively the VID is not found, returning 3115 * 0 means success, which is a failure for us here. 3116 */ 3117 err = br_vlan_get_info(br, vid, &br_info); 3118 if (err == 0) { 3119 NL_SET_ERR_MSG_MOD(extack, 3120 "This VLAN is already configured by the bridge"); 3121 return notifier_from_errno(-EBUSY); 3122 } 3123 3124 return NOTIFY_DONE; 3125 } 3126 3127 static int 3128 dsa_user_prechangeupper_sanity_check(struct net_device *dev, 3129 struct netdev_notifier_changeupper_info *info) 3130 { 3131 struct dsa_switch *ds; 3132 struct dsa_port *dp; 3133 int err; 3134 3135 if (!dsa_user_dev_check(dev)) 3136 return dsa_prevent_bridging_8021q_upper(dev, info); 3137 3138 dp = dsa_user_to_port(dev); 3139 ds = dp->ds; 3140 3141 if (ds->ops->port_prechangeupper) { 3142 err = ds->ops->port_prechangeupper(ds, dp->index, info); 3143 if (err) 3144 return notifier_from_errno(err); 3145 } 3146 3147 if (is_vlan_dev(info->upper_dev)) 3148 return dsa_user_check_8021q_upper(dev, info); 3149 3150 return NOTIFY_DONE; 3151 } 3152 3153 /* To be eligible as a DSA conduit, a LAG must have all lower interfaces be 3154 * eligible DSA conduits. Additionally, all LAG slaves must be DSA conduits of 3155 * switches in the same switch tree. 3156 */ 3157 static int dsa_lag_conduit_validate(struct net_device *lag_dev, 3158 struct netlink_ext_ack *extack) 3159 { 3160 struct net_device *lower1, *lower2; 3161 struct list_head *iter1, *iter2; 3162 3163 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 3164 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 3165 if (!netdev_uses_dsa(lower1) || 3166 !netdev_uses_dsa(lower2)) { 3167 NL_SET_ERR_MSG_MOD(extack, 3168 "All LAG ports must be eligible as DSA conduits"); 3169 return notifier_from_errno(-EINVAL); 3170 } 3171 3172 if (lower1 == lower2) 3173 continue; 3174 3175 if (!dsa_port_tree_same(lower1->dsa_ptr, 3176 lower2->dsa_ptr)) { 3177 NL_SET_ERR_MSG_MOD(extack, 3178 "LAG contains DSA conduits of disjoint switch trees"); 3179 return notifier_from_errno(-EINVAL); 3180 } 3181 } 3182 } 3183 3184 return NOTIFY_DONE; 3185 } 3186 3187 static int 3188 dsa_conduit_prechangeupper_sanity_check(struct net_device *conduit, 3189 struct netdev_notifier_changeupper_info *info) 3190 { 3191 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3192 3193 if (!netdev_uses_dsa(conduit)) 3194 return NOTIFY_DONE; 3195 3196 if (!info->linking) 3197 return NOTIFY_DONE; 3198 3199 /* Allow DSA switch uppers */ 3200 if (dsa_user_dev_check(info->upper_dev)) 3201 return NOTIFY_DONE; 3202 3203 /* Allow bridge uppers of DSA conduits, subject to further 3204 * restrictions in dsa_bridge_prechangelower_sanity_check() 3205 */ 3206 if (netif_is_bridge_master(info->upper_dev)) 3207 return NOTIFY_DONE; 3208 3209 /* Allow LAG uppers, subject to further restrictions in 3210 * dsa_lag_conduit_prechangelower_sanity_check() 3211 */ 3212 if (netif_is_lag_master(info->upper_dev)) 3213 return dsa_lag_conduit_validate(info->upper_dev, extack); 3214 3215 NL_SET_ERR_MSG_MOD(extack, 3216 "DSA conduit cannot join unknown upper interfaces"); 3217 return notifier_from_errno(-EBUSY); 3218 } 3219 3220 static int 3221 dsa_lag_conduit_prechangelower_sanity_check(struct net_device *dev, 3222 struct netdev_notifier_changeupper_info *info) 3223 { 3224 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3225 struct net_device *lag_dev = info->upper_dev; 3226 struct net_device *lower; 3227 struct list_head *iter; 3228 3229 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 3230 return NOTIFY_DONE; 3231 3232 if (!info->linking) 3233 return NOTIFY_DONE; 3234 3235 if (!netdev_uses_dsa(dev)) { 3236 NL_SET_ERR_MSG(extack, 3237 "Only DSA conduits can join a LAG DSA conduit"); 3238 return notifier_from_errno(-EINVAL); 3239 } 3240 3241 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3242 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 3243 NL_SET_ERR_MSG(extack, 3244 "Interface is DSA conduit for a different switch tree than this LAG"); 3245 return notifier_from_errno(-EINVAL); 3246 } 3247 3248 break; 3249 } 3250 3251 return NOTIFY_DONE; 3252 } 3253 3254 /* Don't allow bridging of DSA conduits, since the bridge layer rx_handler 3255 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 3256 * chance to strip off and parse the DSA switch tag protocol header (the bridge 3257 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 3258 * frames). 3259 * The only case where that would not be an issue is when bridging can already 3260 * be offloaded, such as when the DSA conduit is itself a DSA or plain switchdev 3261 * port, and is bridged only with other ports from the same hardware device. 3262 */ 3263 static int 3264 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 3265 struct netdev_notifier_changeupper_info *info) 3266 { 3267 struct net_device *br = info->upper_dev; 3268 struct netlink_ext_ack *extack; 3269 struct net_device *lower; 3270 struct list_head *iter; 3271 3272 if (!netif_is_bridge_master(br)) 3273 return NOTIFY_DONE; 3274 3275 if (!info->linking) 3276 return NOTIFY_DONE; 3277 3278 extack = netdev_notifier_info_to_extack(&info->info); 3279 3280 netdev_for_each_lower_dev(br, lower, iter) { 3281 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 3282 continue; 3283 3284 if (!netdev_port_same_parent_id(lower, new_lower)) { 3285 NL_SET_ERR_MSG(extack, 3286 "Cannot do software bridging with a DSA conduit"); 3287 return notifier_from_errno(-EINVAL); 3288 } 3289 } 3290 3291 return NOTIFY_DONE; 3292 } 3293 3294 static void dsa_tree_migrate_ports_from_lag_conduit(struct dsa_switch_tree *dst, 3295 struct net_device *lag_dev) 3296 { 3297 struct net_device *new_conduit = dsa_tree_find_first_conduit(dst); 3298 struct dsa_port *dp; 3299 int err; 3300 3301 dsa_tree_for_each_user_port(dp, dst) { 3302 if (dsa_port_to_conduit(dp) != lag_dev) 3303 continue; 3304 3305 err = dsa_user_change_conduit(dp->user, new_conduit, NULL); 3306 if (err) { 3307 netdev_err(dp->user, 3308 "failed to restore conduit to %s: %pe\n", 3309 new_conduit->name, ERR_PTR(err)); 3310 } 3311 } 3312 } 3313 3314 static int dsa_conduit_lag_join(struct net_device *conduit, 3315 struct net_device *lag_dev, 3316 struct netdev_lag_upper_info *uinfo, 3317 struct netlink_ext_ack *extack) 3318 { 3319 struct dsa_port *cpu_dp = conduit->dsa_ptr; 3320 struct dsa_switch_tree *dst = cpu_dp->dst; 3321 struct dsa_port *dp; 3322 int err; 3323 3324 err = dsa_conduit_lag_setup(lag_dev, cpu_dp, uinfo, extack); 3325 if (err) 3326 return err; 3327 3328 dsa_tree_for_each_user_port(dp, dst) { 3329 if (dsa_port_to_conduit(dp) != conduit) 3330 continue; 3331 3332 err = dsa_user_change_conduit(dp->user, lag_dev, extack); 3333 if (err) 3334 goto restore; 3335 } 3336 3337 return 0; 3338 3339 restore: 3340 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3341 if (dsa_port_to_conduit(dp) != lag_dev) 3342 continue; 3343 3344 err = dsa_user_change_conduit(dp->user, conduit, NULL); 3345 if (err) { 3346 netdev_err(dp->user, 3347 "failed to restore conduit to %s: %pe\n", 3348 conduit->name, ERR_PTR(err)); 3349 } 3350 } 3351 3352 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3353 3354 return err; 3355 } 3356 3357 static void dsa_conduit_lag_leave(struct net_device *conduit, 3358 struct net_device *lag_dev) 3359 { 3360 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3361 struct dsa_switch_tree *dst = cpu_dp->dst; 3362 struct dsa_port *new_cpu_dp = NULL; 3363 struct net_device *lower; 3364 struct list_head *iter; 3365 3366 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3367 if (netdev_uses_dsa(lower)) { 3368 new_cpu_dp = lower->dsa_ptr; 3369 break; 3370 } 3371 } 3372 3373 if (new_cpu_dp) { 3374 /* Update the CPU port of the user ports still under the LAG 3375 * so that dsa_port_to_conduit() continues to work properly 3376 */ 3377 dsa_tree_for_each_user_port(dp, dst) 3378 if (dsa_port_to_conduit(dp) == lag_dev) 3379 dp->cpu_dp = new_cpu_dp; 3380 3381 /* Update the index of the virtual CPU port to match the lowest 3382 * physical CPU port 3383 */ 3384 lag_dev->dsa_ptr = new_cpu_dp; 3385 wmb(); 3386 } else { 3387 /* If the LAG DSA conduit has no ports left, migrate back all 3388 * user ports to the first physical CPU port 3389 */ 3390 dsa_tree_migrate_ports_from_lag_conduit(dst, lag_dev); 3391 } 3392 3393 /* This DSA conduit has left its LAG in any case, so let 3394 * the CPU port leave the hardware LAG as well 3395 */ 3396 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3397 } 3398 3399 static int dsa_conduit_changeupper(struct net_device *dev, 3400 struct netdev_notifier_changeupper_info *info) 3401 { 3402 struct netlink_ext_ack *extack; 3403 int err = NOTIFY_DONE; 3404 3405 if (!netdev_uses_dsa(dev)) 3406 return err; 3407 3408 extack = netdev_notifier_info_to_extack(&info->info); 3409 3410 if (netif_is_lag_master(info->upper_dev)) { 3411 if (info->linking) { 3412 err = dsa_conduit_lag_join(dev, info->upper_dev, 3413 info->upper_info, extack); 3414 err = notifier_from_errno(err); 3415 } else { 3416 dsa_conduit_lag_leave(dev, info->upper_dev); 3417 err = NOTIFY_OK; 3418 } 3419 } 3420 3421 return err; 3422 } 3423 3424 static int dsa_user_netdevice_event(struct notifier_block *nb, 3425 unsigned long event, void *ptr) 3426 { 3427 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3428 3429 switch (event) { 3430 case NETDEV_PRECHANGEUPPER: { 3431 struct netdev_notifier_changeupper_info *info = ptr; 3432 int err; 3433 3434 err = dsa_user_prechangeupper_sanity_check(dev, info); 3435 if (notifier_to_errno(err)) 3436 return err; 3437 3438 err = dsa_conduit_prechangeupper_sanity_check(dev, info); 3439 if (notifier_to_errno(err)) 3440 return err; 3441 3442 err = dsa_lag_conduit_prechangelower_sanity_check(dev, info); 3443 if (notifier_to_errno(err)) 3444 return err; 3445 3446 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3447 if (notifier_to_errno(err)) 3448 return err; 3449 3450 err = dsa_user_prechangeupper(dev, ptr); 3451 if (notifier_to_errno(err)) 3452 return err; 3453 3454 err = dsa_user_lag_prechangeupper(dev, ptr); 3455 if (notifier_to_errno(err)) 3456 return err; 3457 3458 break; 3459 } 3460 case NETDEV_CHANGEUPPER: { 3461 int err; 3462 3463 err = dsa_user_changeupper(dev, ptr); 3464 if (notifier_to_errno(err)) 3465 return err; 3466 3467 err = dsa_user_lag_changeupper(dev, ptr); 3468 if (notifier_to_errno(err)) 3469 return err; 3470 3471 err = dsa_conduit_changeupper(dev, ptr); 3472 if (notifier_to_errno(err)) 3473 return err; 3474 3475 break; 3476 } 3477 case NETDEV_CHANGELOWERSTATE: { 3478 struct netdev_notifier_changelowerstate_info *info = ptr; 3479 struct dsa_port *dp; 3480 int err = 0; 3481 3482 if (dsa_user_dev_check(dev)) { 3483 dp = dsa_user_to_port(dev); 3484 3485 err = dsa_port_lag_change(dp, info->lower_state_info); 3486 } 3487 3488 /* Mirror LAG port events on DSA conduits that are in 3489 * a LAG towards their respective switch CPU ports 3490 */ 3491 if (netdev_uses_dsa(dev)) { 3492 dp = dev->dsa_ptr; 3493 3494 err = dsa_port_lag_change(dp, info->lower_state_info); 3495 } 3496 3497 return notifier_from_errno(err); 3498 } 3499 case NETDEV_CHANGE: 3500 case NETDEV_UP: { 3501 /* Track state of conduit port. 3502 * DSA driver may require the conduit port (and indirectly 3503 * the tagger) to be available for some special operation. 3504 */ 3505 if (netdev_uses_dsa(dev)) { 3506 struct dsa_port *cpu_dp = dev->dsa_ptr; 3507 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3508 3509 /* Track when the conduit port is UP */ 3510 dsa_tree_conduit_oper_state_change(dst, dev, 3511 netif_oper_up(dev)); 3512 3513 /* Track when the conduit port is ready and can accept 3514 * packet. 3515 * NETDEV_UP event is not enough to flag a port as ready. 3516 * We also have to wait for linkwatch_do_dev to dev_activate 3517 * and emit a NETDEV_CHANGE event. 3518 * We check if a conduit port is ready by checking if the dev 3519 * have a qdisc assigned and is not noop. 3520 */ 3521 dsa_tree_conduit_admin_state_change(dst, dev, 3522 !qdisc_tx_is_noop(dev)); 3523 3524 return NOTIFY_OK; 3525 } 3526 3527 return NOTIFY_DONE; 3528 } 3529 case NETDEV_GOING_DOWN: { 3530 struct dsa_port *dp, *cpu_dp; 3531 struct dsa_switch_tree *dst; 3532 LIST_HEAD(close_list); 3533 3534 if (!netdev_uses_dsa(dev)) 3535 return NOTIFY_DONE; 3536 3537 cpu_dp = dev->dsa_ptr; 3538 dst = cpu_dp->ds->dst; 3539 3540 dsa_tree_conduit_admin_state_change(dst, dev, false); 3541 3542 list_for_each_entry(dp, &dst->ports, list) { 3543 if (!dsa_port_is_user(dp)) 3544 continue; 3545 3546 if (dp->cpu_dp != cpu_dp) 3547 continue; 3548 3549 list_add(&dp->user->close_list, &close_list); 3550 } 3551 3552 dev_close_many(&close_list, true); 3553 3554 return NOTIFY_OK; 3555 } 3556 default: 3557 break; 3558 } 3559 3560 return NOTIFY_DONE; 3561 } 3562 3563 static void 3564 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3565 { 3566 struct switchdev_notifier_fdb_info info = {}; 3567 3568 info.addr = switchdev_work->addr; 3569 info.vid = switchdev_work->vid; 3570 info.offloaded = true; 3571 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3572 switchdev_work->orig_dev, &info.info, NULL); 3573 } 3574 3575 static void dsa_user_switchdev_event_work(struct work_struct *work) 3576 { 3577 struct dsa_switchdev_event_work *switchdev_work = 3578 container_of(work, struct dsa_switchdev_event_work, work); 3579 const unsigned char *addr = switchdev_work->addr; 3580 struct net_device *dev = switchdev_work->dev; 3581 u16 vid = switchdev_work->vid; 3582 struct dsa_switch *ds; 3583 struct dsa_port *dp; 3584 int err; 3585 3586 dp = dsa_user_to_port(dev); 3587 ds = dp->ds; 3588 3589 switch (switchdev_work->event) { 3590 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3591 if (switchdev_work->host_addr) 3592 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3593 else if (dp->lag) 3594 err = dsa_port_lag_fdb_add(dp, addr, vid); 3595 else 3596 err = dsa_port_fdb_add(dp, addr, vid); 3597 if (err) { 3598 dev_err(ds->dev, 3599 "port %d failed to add %pM vid %d to fdb: %d\n", 3600 dp->index, addr, vid, err); 3601 break; 3602 } 3603 dsa_fdb_offload_notify(switchdev_work); 3604 break; 3605 3606 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3607 if (switchdev_work->host_addr) 3608 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3609 else if (dp->lag) 3610 err = dsa_port_lag_fdb_del(dp, addr, vid); 3611 else 3612 err = dsa_port_fdb_del(dp, addr, vid); 3613 if (err) { 3614 dev_err(ds->dev, 3615 "port %d failed to delete %pM vid %d from fdb: %d\n", 3616 dp->index, addr, vid, err); 3617 } 3618 3619 break; 3620 } 3621 3622 kfree(switchdev_work); 3623 } 3624 3625 static bool dsa_foreign_dev_check(const struct net_device *dev, 3626 const struct net_device *foreign_dev) 3627 { 3628 const struct dsa_port *dp = dsa_user_to_port(dev); 3629 struct dsa_switch_tree *dst = dp->ds->dst; 3630 3631 if (netif_is_bridge_master(foreign_dev)) 3632 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3633 3634 if (netif_is_bridge_port(foreign_dev)) 3635 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3636 3637 /* Everything else is foreign */ 3638 return true; 3639 } 3640 3641 static int dsa_user_fdb_event(struct net_device *dev, 3642 struct net_device *orig_dev, 3643 unsigned long event, const void *ctx, 3644 const struct switchdev_notifier_fdb_info *fdb_info) 3645 { 3646 struct dsa_switchdev_event_work *switchdev_work; 3647 struct dsa_port *dp = dsa_user_to_port(dev); 3648 bool host_addr = fdb_info->is_local; 3649 struct dsa_switch *ds = dp->ds; 3650 3651 if (ctx && ctx != dp) 3652 return 0; 3653 3654 if (!dp->bridge) 3655 return 0; 3656 3657 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3658 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3659 return 0; 3660 3661 /* FDB entries learned by the software bridge or by foreign 3662 * bridge ports should be installed as host addresses only if 3663 * the driver requests assisted learning. 3664 */ 3665 if (!ds->assisted_learning_on_cpu_port) 3666 return 0; 3667 } 3668 3669 /* Also treat FDB entries on foreign interfaces bridged with us as host 3670 * addresses. 3671 */ 3672 if (dsa_foreign_dev_check(dev, orig_dev)) 3673 host_addr = true; 3674 3675 /* Check early that we're not doing work in vain. 3676 * Host addresses on LAG ports still require regular FDB ops, 3677 * since the CPU port isn't in a LAG. 3678 */ 3679 if (dp->lag && !host_addr) { 3680 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3681 return -EOPNOTSUPP; 3682 } else { 3683 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3684 return -EOPNOTSUPP; 3685 } 3686 3687 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3688 if (!switchdev_work) 3689 return -ENOMEM; 3690 3691 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3692 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3693 orig_dev->name, fdb_info->addr, fdb_info->vid, 3694 host_addr ? " as host address" : ""); 3695 3696 INIT_WORK(&switchdev_work->work, dsa_user_switchdev_event_work); 3697 switchdev_work->event = event; 3698 switchdev_work->dev = dev; 3699 switchdev_work->orig_dev = orig_dev; 3700 3701 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3702 switchdev_work->vid = fdb_info->vid; 3703 switchdev_work->host_addr = host_addr; 3704 3705 dsa_schedule_work(&switchdev_work->work); 3706 3707 return 0; 3708 } 3709 3710 /* Called under rcu_read_lock() */ 3711 static int dsa_user_switchdev_event(struct notifier_block *unused, 3712 unsigned long event, void *ptr) 3713 { 3714 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3715 int err; 3716 3717 switch (event) { 3718 case SWITCHDEV_PORT_ATTR_SET: 3719 err = switchdev_handle_port_attr_set(dev, ptr, 3720 dsa_user_dev_check, 3721 dsa_user_port_attr_set); 3722 return notifier_from_errno(err); 3723 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3724 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3725 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3726 dsa_user_dev_check, 3727 dsa_foreign_dev_check, 3728 dsa_user_fdb_event); 3729 return notifier_from_errno(err); 3730 default: 3731 return NOTIFY_DONE; 3732 } 3733 3734 return NOTIFY_OK; 3735 } 3736 3737 static int dsa_user_switchdev_blocking_event(struct notifier_block *unused, 3738 unsigned long event, void *ptr) 3739 { 3740 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3741 int err; 3742 3743 switch (event) { 3744 case SWITCHDEV_PORT_OBJ_ADD: 3745 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3746 dsa_user_dev_check, 3747 dsa_foreign_dev_check, 3748 dsa_user_port_obj_add); 3749 return notifier_from_errno(err); 3750 case SWITCHDEV_PORT_OBJ_DEL: 3751 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3752 dsa_user_dev_check, 3753 dsa_foreign_dev_check, 3754 dsa_user_port_obj_del); 3755 return notifier_from_errno(err); 3756 case SWITCHDEV_PORT_ATTR_SET: 3757 err = switchdev_handle_port_attr_set(dev, ptr, 3758 dsa_user_dev_check, 3759 dsa_user_port_attr_set); 3760 return notifier_from_errno(err); 3761 } 3762 3763 return NOTIFY_DONE; 3764 } 3765 3766 static struct notifier_block dsa_user_nb __read_mostly = { 3767 .notifier_call = dsa_user_netdevice_event, 3768 }; 3769 3770 struct notifier_block dsa_user_switchdev_notifier = { 3771 .notifier_call = dsa_user_switchdev_event, 3772 }; 3773 3774 struct notifier_block dsa_user_switchdev_blocking_notifier = { 3775 .notifier_call = dsa_user_switchdev_blocking_event, 3776 }; 3777 3778 int dsa_user_register_notifier(void) 3779 { 3780 struct notifier_block *nb; 3781 int err; 3782 3783 err = register_netdevice_notifier(&dsa_user_nb); 3784 if (err) 3785 return err; 3786 3787 err = register_switchdev_notifier(&dsa_user_switchdev_notifier); 3788 if (err) 3789 goto err_switchdev_nb; 3790 3791 nb = &dsa_user_switchdev_blocking_notifier; 3792 err = register_switchdev_blocking_notifier(nb); 3793 if (err) 3794 goto err_switchdev_blocking_nb; 3795 3796 return 0; 3797 3798 err_switchdev_blocking_nb: 3799 unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3800 err_switchdev_nb: 3801 unregister_netdevice_notifier(&dsa_user_nb); 3802 return err; 3803 } 3804 3805 void dsa_user_unregister_notifier(void) 3806 { 3807 struct notifier_block *nb; 3808 int err; 3809 3810 nb = &dsa_user_switchdev_blocking_notifier; 3811 err = unregister_switchdev_blocking_notifier(nb); 3812 if (err) 3813 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3814 3815 err = unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3816 if (err) 3817 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3818 3819 err = unregister_netdevice_notifier(&dsa_user_nb); 3820 if (err) 3821 pr_err("DSA: failed to unregister user notifier (%d)\n", err); 3822 } 3823