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 (!ds->ops->port_mirror_add) 1380 return -EOPNOTSUPP; 1381 1382 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1383 cls->common.extack)) 1384 return -EOPNOTSUPP; 1385 1386 act = &cls->rule->action.entries[0]; 1387 1388 if (!act->dev) 1389 return -EINVAL; 1390 1391 if (!dsa_user_dev_check(act->dev)) 1392 return -EOPNOTSUPP; 1393 1394 to_dp = dsa_user_to_port(act->dev); 1395 1396 if (dp->ds != to_dp->ds) { 1397 NL_SET_ERR_MSG_MOD(extack, 1398 "Cross-chip mirroring not implemented"); 1399 return -EOPNOTSUPP; 1400 } 1401 1402 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1403 if (!mall_tc_entry) 1404 return -ENOMEM; 1405 1406 mall_tc_entry->cookie = cls->cookie; 1407 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1408 mirror = &mall_tc_entry->mirror; 1409 mirror->to_local_port = to_dp->index; 1410 mirror->ingress = ingress; 1411 1412 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1413 if (err) { 1414 kfree(mall_tc_entry); 1415 return err; 1416 } 1417 1418 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1419 1420 return err; 1421 } 1422 1423 static int 1424 dsa_user_add_cls_matchall_police(struct net_device *dev, 1425 struct tc_cls_matchall_offload *cls, 1426 bool ingress) 1427 { 1428 struct netlink_ext_ack *extack = cls->common.extack; 1429 struct dsa_port *dp = dsa_user_to_port(dev); 1430 struct dsa_user_priv *p = netdev_priv(dev); 1431 struct dsa_mall_policer_tc_entry *policer; 1432 struct dsa_mall_tc_entry *mall_tc_entry; 1433 struct dsa_switch *ds = dp->ds; 1434 struct flow_action_entry *act; 1435 int err; 1436 1437 if (!ds->ops->port_policer_add) { 1438 NL_SET_ERR_MSG_MOD(extack, 1439 "Policing offload not implemented"); 1440 return -EOPNOTSUPP; 1441 } 1442 1443 if (!ingress) { 1444 NL_SET_ERR_MSG_MOD(extack, 1445 "Only supported on ingress qdisc"); 1446 return -EOPNOTSUPP; 1447 } 1448 1449 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1450 cls->common.extack)) 1451 return -EOPNOTSUPP; 1452 1453 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1454 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1455 NL_SET_ERR_MSG_MOD(extack, 1456 "Only one port policer allowed"); 1457 return -EEXIST; 1458 } 1459 } 1460 1461 act = &cls->rule->action.entries[0]; 1462 1463 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1464 if (!mall_tc_entry) 1465 return -ENOMEM; 1466 1467 mall_tc_entry->cookie = cls->cookie; 1468 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1469 policer = &mall_tc_entry->policer; 1470 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1471 policer->burst = act->police.burst; 1472 1473 err = ds->ops->port_policer_add(ds, dp->index, policer); 1474 if (err) { 1475 kfree(mall_tc_entry); 1476 return err; 1477 } 1478 1479 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1480 1481 return err; 1482 } 1483 1484 static int dsa_user_add_cls_matchall(struct net_device *dev, 1485 struct tc_cls_matchall_offload *cls, 1486 bool ingress) 1487 { 1488 int err = -EOPNOTSUPP; 1489 1490 if (cls->common.protocol == htons(ETH_P_ALL) && 1491 flow_offload_has_one_action(&cls->rule->action) && 1492 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1493 err = dsa_user_add_cls_matchall_mirred(dev, cls, ingress); 1494 else if (flow_offload_has_one_action(&cls->rule->action) && 1495 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1496 err = dsa_user_add_cls_matchall_police(dev, cls, ingress); 1497 1498 return err; 1499 } 1500 1501 static void dsa_user_del_cls_matchall(struct net_device *dev, 1502 struct tc_cls_matchall_offload *cls) 1503 { 1504 struct dsa_port *dp = dsa_user_to_port(dev); 1505 struct dsa_mall_tc_entry *mall_tc_entry; 1506 struct dsa_switch *ds = dp->ds; 1507 1508 mall_tc_entry = dsa_user_mall_tc_entry_find(dev, cls->cookie); 1509 if (!mall_tc_entry) 1510 return; 1511 1512 list_del(&mall_tc_entry->list); 1513 1514 switch (mall_tc_entry->type) { 1515 case DSA_PORT_MALL_MIRROR: 1516 if (ds->ops->port_mirror_del) 1517 ds->ops->port_mirror_del(ds, dp->index, 1518 &mall_tc_entry->mirror); 1519 break; 1520 case DSA_PORT_MALL_POLICER: 1521 if (ds->ops->port_policer_del) 1522 ds->ops->port_policer_del(ds, dp->index); 1523 break; 1524 default: 1525 WARN_ON(1); 1526 } 1527 1528 kfree(mall_tc_entry); 1529 } 1530 1531 static int dsa_user_setup_tc_cls_matchall(struct net_device *dev, 1532 struct tc_cls_matchall_offload *cls, 1533 bool ingress) 1534 { 1535 if (cls->common.chain_index) 1536 return -EOPNOTSUPP; 1537 1538 switch (cls->command) { 1539 case TC_CLSMATCHALL_REPLACE: 1540 return dsa_user_add_cls_matchall(dev, cls, ingress); 1541 case TC_CLSMATCHALL_DESTROY: 1542 dsa_user_del_cls_matchall(dev, cls); 1543 return 0; 1544 default: 1545 return -EOPNOTSUPP; 1546 } 1547 } 1548 1549 static int dsa_user_add_cls_flower(struct net_device *dev, 1550 struct flow_cls_offload *cls, 1551 bool ingress) 1552 { 1553 struct dsa_port *dp = dsa_user_to_port(dev); 1554 struct dsa_switch *ds = dp->ds; 1555 int port = dp->index; 1556 1557 if (!ds->ops->cls_flower_add) 1558 return -EOPNOTSUPP; 1559 1560 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1561 } 1562 1563 static int dsa_user_del_cls_flower(struct net_device *dev, 1564 struct flow_cls_offload *cls, 1565 bool ingress) 1566 { 1567 struct dsa_port *dp = dsa_user_to_port(dev); 1568 struct dsa_switch *ds = dp->ds; 1569 int port = dp->index; 1570 1571 if (!ds->ops->cls_flower_del) 1572 return -EOPNOTSUPP; 1573 1574 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1575 } 1576 1577 static int dsa_user_stats_cls_flower(struct net_device *dev, 1578 struct flow_cls_offload *cls, 1579 bool ingress) 1580 { 1581 struct dsa_port *dp = dsa_user_to_port(dev); 1582 struct dsa_switch *ds = dp->ds; 1583 int port = dp->index; 1584 1585 if (!ds->ops->cls_flower_stats) 1586 return -EOPNOTSUPP; 1587 1588 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1589 } 1590 1591 static int dsa_user_setup_tc_cls_flower(struct net_device *dev, 1592 struct flow_cls_offload *cls, 1593 bool ingress) 1594 { 1595 switch (cls->command) { 1596 case FLOW_CLS_REPLACE: 1597 return dsa_user_add_cls_flower(dev, cls, ingress); 1598 case FLOW_CLS_DESTROY: 1599 return dsa_user_del_cls_flower(dev, cls, ingress); 1600 case FLOW_CLS_STATS: 1601 return dsa_user_stats_cls_flower(dev, cls, ingress); 1602 default: 1603 return -EOPNOTSUPP; 1604 } 1605 } 1606 1607 static int dsa_user_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1608 void *cb_priv, bool ingress) 1609 { 1610 struct net_device *dev = cb_priv; 1611 1612 if (!tc_can_offload(dev)) 1613 return -EOPNOTSUPP; 1614 1615 switch (type) { 1616 case TC_SETUP_CLSMATCHALL: 1617 return dsa_user_setup_tc_cls_matchall(dev, type_data, ingress); 1618 case TC_SETUP_CLSFLOWER: 1619 return dsa_user_setup_tc_cls_flower(dev, type_data, ingress); 1620 default: 1621 return -EOPNOTSUPP; 1622 } 1623 } 1624 1625 static int dsa_user_setup_tc_block_cb_ig(enum tc_setup_type type, 1626 void *type_data, void *cb_priv) 1627 { 1628 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, true); 1629 } 1630 1631 static int dsa_user_setup_tc_block_cb_eg(enum tc_setup_type type, 1632 void *type_data, void *cb_priv) 1633 { 1634 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, false); 1635 } 1636 1637 static LIST_HEAD(dsa_user_block_cb_list); 1638 1639 static int dsa_user_setup_tc_block(struct net_device *dev, 1640 struct flow_block_offload *f) 1641 { 1642 struct flow_block_cb *block_cb; 1643 flow_setup_cb_t *cb; 1644 1645 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1646 cb = dsa_user_setup_tc_block_cb_ig; 1647 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1648 cb = dsa_user_setup_tc_block_cb_eg; 1649 else 1650 return -EOPNOTSUPP; 1651 1652 f->driver_block_list = &dsa_user_block_cb_list; 1653 1654 switch (f->command) { 1655 case FLOW_BLOCK_BIND: 1656 if (flow_block_cb_is_busy(cb, dev, &dsa_user_block_cb_list)) 1657 return -EBUSY; 1658 1659 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1660 if (IS_ERR(block_cb)) 1661 return PTR_ERR(block_cb); 1662 1663 flow_block_cb_add(block_cb, f); 1664 list_add_tail(&block_cb->driver_list, &dsa_user_block_cb_list); 1665 return 0; 1666 case FLOW_BLOCK_UNBIND: 1667 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1668 if (!block_cb) 1669 return -ENOENT; 1670 1671 flow_block_cb_remove(block_cb, f); 1672 list_del(&block_cb->driver_list); 1673 return 0; 1674 default: 1675 return -EOPNOTSUPP; 1676 } 1677 } 1678 1679 static int dsa_user_setup_ft_block(struct dsa_switch *ds, int port, 1680 void *type_data) 1681 { 1682 struct net_device *conduit = dsa_port_to_conduit(dsa_to_port(ds, port)); 1683 1684 if (!conduit->netdev_ops->ndo_setup_tc) 1685 return -EOPNOTSUPP; 1686 1687 return conduit->netdev_ops->ndo_setup_tc(conduit, TC_SETUP_FT, type_data); 1688 } 1689 1690 static int dsa_user_setup_tc(struct net_device *dev, enum tc_setup_type type, 1691 void *type_data) 1692 { 1693 struct dsa_port *dp = dsa_user_to_port(dev); 1694 struct dsa_switch *ds = dp->ds; 1695 1696 switch (type) { 1697 case TC_SETUP_BLOCK: 1698 return dsa_user_setup_tc_block(dev, type_data); 1699 case TC_SETUP_FT: 1700 return dsa_user_setup_ft_block(ds, dp->index, type_data); 1701 default: 1702 break; 1703 } 1704 1705 if (!ds->ops->port_setup_tc) 1706 return -EOPNOTSUPP; 1707 1708 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1709 } 1710 1711 static int dsa_user_get_rxnfc(struct net_device *dev, 1712 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1713 { 1714 struct dsa_port *dp = dsa_user_to_port(dev); 1715 struct dsa_switch *ds = dp->ds; 1716 1717 if (!ds->ops->get_rxnfc) 1718 return -EOPNOTSUPP; 1719 1720 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1721 } 1722 1723 static int dsa_user_set_rxnfc(struct net_device *dev, 1724 struct ethtool_rxnfc *nfc) 1725 { 1726 struct dsa_port *dp = dsa_user_to_port(dev); 1727 struct dsa_switch *ds = dp->ds; 1728 1729 if (!ds->ops->set_rxnfc) 1730 return -EOPNOTSUPP; 1731 1732 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1733 } 1734 1735 static int dsa_user_get_ts_info(struct net_device *dev, 1736 struct kernel_ethtool_ts_info *ts) 1737 { 1738 struct dsa_user_priv *p = netdev_priv(dev); 1739 struct dsa_switch *ds = p->dp->ds; 1740 1741 if (!ds->ops->get_ts_info) 1742 return -EOPNOTSUPP; 1743 1744 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1745 } 1746 1747 static int dsa_user_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1748 u16 vid) 1749 { 1750 struct dsa_port *dp = dsa_user_to_port(dev); 1751 struct switchdev_obj_port_vlan vlan = { 1752 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1753 .vid = vid, 1754 /* This API only allows programming tagged, non-PVID VIDs */ 1755 .flags = 0, 1756 }; 1757 struct netlink_ext_ack extack = {0}; 1758 struct dsa_switch *ds = dp->ds; 1759 struct netdev_hw_addr *ha; 1760 struct dsa_vlan *v; 1761 int ret; 1762 1763 /* User port... */ 1764 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1765 if (ret) { 1766 if (extack._msg) 1767 netdev_err(dev, "%s\n", extack._msg); 1768 return ret; 1769 } 1770 1771 /* And CPU port... */ 1772 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1773 if (ret) { 1774 if (extack._msg) 1775 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1776 extack._msg); 1777 return ret; 1778 } 1779 1780 if (!dsa_switch_supports_uc_filtering(ds) && 1781 !dsa_switch_supports_mc_filtering(ds)) 1782 return 0; 1783 1784 v = kzalloc(sizeof(*v), GFP_KERNEL); 1785 if (!v) { 1786 ret = -ENOMEM; 1787 goto rollback; 1788 } 1789 1790 netif_addr_lock_bh(dev); 1791 1792 v->vid = vid; 1793 list_add_tail(&v->list, &dp->user_vlans); 1794 1795 if (dsa_switch_supports_mc_filtering(ds)) { 1796 netdev_for_each_synced_mc_addr(ha, dev) { 1797 dsa_user_schedule_standalone_work(dev, DSA_MC_ADD, 1798 ha->addr, vid); 1799 } 1800 } 1801 1802 if (dsa_switch_supports_uc_filtering(ds)) { 1803 netdev_for_each_synced_uc_addr(ha, dev) { 1804 dsa_user_schedule_standalone_work(dev, DSA_UC_ADD, 1805 ha->addr, vid); 1806 } 1807 } 1808 1809 netif_addr_unlock_bh(dev); 1810 1811 dsa_flush_workqueue(); 1812 1813 return 0; 1814 1815 rollback: 1816 dsa_port_host_vlan_del(dp, &vlan); 1817 dsa_port_vlan_del(dp, &vlan); 1818 1819 return ret; 1820 } 1821 1822 static int dsa_user_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1823 u16 vid) 1824 { 1825 struct dsa_port *dp = dsa_user_to_port(dev); 1826 struct switchdev_obj_port_vlan vlan = { 1827 .vid = vid, 1828 /* This API only allows programming tagged, non-PVID VIDs */ 1829 .flags = 0, 1830 }; 1831 struct dsa_switch *ds = dp->ds; 1832 struct netdev_hw_addr *ha; 1833 struct dsa_vlan *v; 1834 int err; 1835 1836 err = dsa_port_vlan_del(dp, &vlan); 1837 if (err) 1838 return err; 1839 1840 err = dsa_port_host_vlan_del(dp, &vlan); 1841 if (err) 1842 return err; 1843 1844 if (!dsa_switch_supports_uc_filtering(ds) && 1845 !dsa_switch_supports_mc_filtering(ds)) 1846 return 0; 1847 1848 netif_addr_lock_bh(dev); 1849 1850 v = dsa_vlan_find(&dp->user_vlans, &vlan); 1851 if (!v) { 1852 netif_addr_unlock_bh(dev); 1853 return -ENOENT; 1854 } 1855 1856 list_del(&v->list); 1857 kfree(v); 1858 1859 if (dsa_switch_supports_mc_filtering(ds)) { 1860 netdev_for_each_synced_mc_addr(ha, dev) { 1861 dsa_user_schedule_standalone_work(dev, DSA_MC_DEL, 1862 ha->addr, vid); 1863 } 1864 } 1865 1866 if (dsa_switch_supports_uc_filtering(ds)) { 1867 netdev_for_each_synced_uc_addr(ha, dev) { 1868 dsa_user_schedule_standalone_work(dev, DSA_UC_DEL, 1869 ha->addr, vid); 1870 } 1871 } 1872 1873 netif_addr_unlock_bh(dev); 1874 1875 dsa_flush_workqueue(); 1876 1877 return 0; 1878 } 1879 1880 static int dsa_user_restore_vlan(struct net_device *vdev, int vid, void *arg) 1881 { 1882 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1883 1884 return dsa_user_vlan_rx_add_vid(arg, proto, vid); 1885 } 1886 1887 static int dsa_user_clear_vlan(struct net_device *vdev, int vid, void *arg) 1888 { 1889 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1890 1891 return dsa_user_vlan_rx_kill_vid(arg, proto, vid); 1892 } 1893 1894 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1895 * filtering is enabled. The baseline is that only ports that offload a 1896 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1897 * but there are exceptions for quirky hardware. 1898 * 1899 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1900 * the same switch with other ports that offload a VLAN-aware bridge are also 1901 * inevitably VLAN-aware. 1902 * 1903 * To summarize, a DSA switch port offloads: 1904 * 1905 * - If standalone (this includes software bridge, software LAG): 1906 * - if ds->needs_standalone_vlan_filtering = true, OR if 1907 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1908 * this switch chip which have vlan_filtering=1) 1909 * - the 8021q upper VLANs 1910 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1911 * global, or it is, but no port is under a VLAN-aware bridge): 1912 * - no VLAN (any 8021q upper is a software VLAN) 1913 * 1914 * - If under a vlan_filtering=0 bridge which it offload: 1915 * - if ds->configure_vlan_while_not_filtering = true (default): 1916 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1917 * - else (deprecated): 1918 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1919 * enabled, so this behavior is broken and discouraged. 1920 * 1921 * - If under a vlan_filtering=1 bridge which it offload: 1922 * - the bridge VLANs 1923 * - the 8021q upper VLANs 1924 */ 1925 int dsa_user_manage_vlan_filtering(struct net_device *user, 1926 bool vlan_filtering) 1927 { 1928 int err; 1929 1930 if (vlan_filtering) { 1931 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1932 1933 err = vlan_for_each(user, dsa_user_restore_vlan, user); 1934 if (err) { 1935 vlan_for_each(user, dsa_user_clear_vlan, user); 1936 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1937 return err; 1938 } 1939 } else { 1940 err = vlan_for_each(user, dsa_user_clear_vlan, user); 1941 if (err) 1942 return err; 1943 1944 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1945 } 1946 1947 return 0; 1948 } 1949 1950 struct dsa_hw_port { 1951 struct list_head list; 1952 struct net_device *dev; 1953 int old_mtu; 1954 }; 1955 1956 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1957 { 1958 const struct dsa_hw_port *p; 1959 int err; 1960 1961 list_for_each_entry(p, hw_port_list, list) { 1962 if (p->dev->mtu == mtu) 1963 continue; 1964 1965 err = dev_set_mtu(p->dev, mtu); 1966 if (err) 1967 goto rollback; 1968 } 1969 1970 return 0; 1971 1972 rollback: 1973 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1974 if (p->dev->mtu == p->old_mtu) 1975 continue; 1976 1977 if (dev_set_mtu(p->dev, p->old_mtu)) 1978 netdev_err(p->dev, "Failed to restore MTU\n"); 1979 } 1980 1981 return err; 1982 } 1983 1984 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1985 { 1986 struct dsa_hw_port *p, *n; 1987 1988 list_for_each_entry_safe(p, n, hw_port_list, list) 1989 kfree(p); 1990 } 1991 1992 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1993 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1994 { 1995 struct list_head hw_port_list; 1996 struct dsa_switch_tree *dst; 1997 int min_mtu = ETH_MAX_MTU; 1998 struct dsa_port *other_dp; 1999 int err; 2000 2001 if (!dp->ds->mtu_enforcement_ingress) 2002 return; 2003 2004 if (!dp->bridge) 2005 return; 2006 2007 INIT_LIST_HEAD(&hw_port_list); 2008 2009 /* Populate the list of ports that are part of the same bridge 2010 * as the newly added/modified port 2011 */ 2012 list_for_each_entry(dst, &dsa_tree_list, list) { 2013 list_for_each_entry(other_dp, &dst->ports, list) { 2014 struct dsa_hw_port *hw_port; 2015 struct net_device *user; 2016 2017 if (other_dp->type != DSA_PORT_TYPE_USER) 2018 continue; 2019 2020 if (!dsa_port_bridge_same(dp, other_dp)) 2021 continue; 2022 2023 if (!other_dp->ds->mtu_enforcement_ingress) 2024 continue; 2025 2026 user = other_dp->user; 2027 2028 if (min_mtu > user->mtu) 2029 min_mtu = user->mtu; 2030 2031 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 2032 if (!hw_port) 2033 goto out; 2034 2035 hw_port->dev = user; 2036 hw_port->old_mtu = user->mtu; 2037 2038 list_add(&hw_port->list, &hw_port_list); 2039 } 2040 } 2041 2042 /* Attempt to configure the entire hardware bridge to the newly added 2043 * interface's MTU first, regardless of whether the intention of the 2044 * user was to raise or lower it. 2045 */ 2046 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->user->mtu); 2047 if (!err) 2048 goto out; 2049 2050 /* Clearly that didn't work out so well, so just set the minimum MTU on 2051 * all hardware bridge ports now. If this fails too, then all ports will 2052 * still have their old MTU rolled back anyway. 2053 */ 2054 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 2055 2056 out: 2057 dsa_hw_port_list_free(&hw_port_list); 2058 } 2059 2060 int dsa_user_change_mtu(struct net_device *dev, int new_mtu) 2061 { 2062 struct net_device *conduit = dsa_user_to_conduit(dev); 2063 struct dsa_port *dp = dsa_user_to_port(dev); 2064 struct dsa_port *cpu_dp = dp->cpu_dp; 2065 struct dsa_switch *ds = dp->ds; 2066 struct dsa_port *other_dp; 2067 int largest_mtu = 0; 2068 int new_conduit_mtu; 2069 int old_conduit_mtu; 2070 int mtu_limit; 2071 int overhead; 2072 int cpu_mtu; 2073 int err; 2074 2075 if (!ds->ops->port_change_mtu) 2076 return -EOPNOTSUPP; 2077 2078 dsa_tree_for_each_user_port(other_dp, ds->dst) { 2079 int user_mtu; 2080 2081 /* During probe, this function will be called for each user 2082 * device, while not all of them have been allocated. That's 2083 * ok, it doesn't change what the maximum is, so ignore it. 2084 */ 2085 if (!other_dp->user) 2086 continue; 2087 2088 /* Pretend that we already applied the setting, which we 2089 * actually haven't (still haven't done all integrity checks) 2090 */ 2091 if (dp == other_dp) 2092 user_mtu = new_mtu; 2093 else 2094 user_mtu = other_dp->user->mtu; 2095 2096 if (largest_mtu < user_mtu) 2097 largest_mtu = user_mtu; 2098 } 2099 2100 overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops); 2101 mtu_limit = min_t(int, conduit->max_mtu, dev->max_mtu + overhead); 2102 old_conduit_mtu = conduit->mtu; 2103 new_conduit_mtu = largest_mtu + overhead; 2104 if (new_conduit_mtu > mtu_limit) 2105 return -ERANGE; 2106 2107 /* If the conduit MTU isn't over limit, there's no need to check the CPU 2108 * MTU, since that surely isn't either. 2109 */ 2110 cpu_mtu = largest_mtu; 2111 2112 /* Start applying stuff */ 2113 if (new_conduit_mtu != old_conduit_mtu) { 2114 err = dev_set_mtu(conduit, new_conduit_mtu); 2115 if (err < 0) 2116 goto out_conduit_failed; 2117 2118 /* We only need to propagate the MTU of the CPU port to 2119 * upstream switches, so emit a notifier which updates them. 2120 */ 2121 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 2122 if (err) 2123 goto out_cpu_failed; 2124 } 2125 2126 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 2127 if (err) 2128 goto out_port_failed; 2129 2130 WRITE_ONCE(dev->mtu, new_mtu); 2131 2132 dsa_bridge_mtu_normalization(dp); 2133 2134 return 0; 2135 2136 out_port_failed: 2137 if (new_conduit_mtu != old_conduit_mtu) 2138 dsa_port_mtu_change(cpu_dp, old_conduit_mtu - overhead); 2139 out_cpu_failed: 2140 if (new_conduit_mtu != old_conduit_mtu) 2141 dev_set_mtu(conduit, old_conduit_mtu); 2142 out_conduit_failed: 2143 return err; 2144 } 2145 2146 static int __maybe_unused 2147 dsa_user_dcbnl_set_apptrust(struct net_device *dev, u8 *sel, int nsel) 2148 { 2149 struct dsa_port *dp = dsa_user_to_port(dev); 2150 struct dsa_switch *ds = dp->ds; 2151 int port = dp->index; 2152 2153 if (!ds->ops->port_set_apptrust) 2154 return -EOPNOTSUPP; 2155 2156 return ds->ops->port_set_apptrust(ds, port, sel, nsel); 2157 } 2158 2159 static int __maybe_unused 2160 dsa_user_dcbnl_get_apptrust(struct net_device *dev, u8 *sel, int *nsel) 2161 { 2162 struct dsa_port *dp = dsa_user_to_port(dev); 2163 struct dsa_switch *ds = dp->ds; 2164 int port = dp->index; 2165 2166 if (!ds->ops->port_get_apptrust) 2167 return -EOPNOTSUPP; 2168 2169 return ds->ops->port_get_apptrust(ds, port, sel, nsel); 2170 } 2171 2172 static int __maybe_unused 2173 dsa_user_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 2174 { 2175 struct dsa_port *dp = dsa_user_to_port(dev); 2176 struct dsa_switch *ds = dp->ds; 2177 unsigned long mask, new_prio; 2178 int err, port = dp->index; 2179 2180 if (!ds->ops->port_set_default_prio) 2181 return -EOPNOTSUPP; 2182 2183 err = dcb_ieee_setapp(dev, app); 2184 if (err) 2185 return err; 2186 2187 mask = dcb_ieee_getapp_mask(dev, app); 2188 new_prio = __fls(mask); 2189 2190 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2191 if (err) { 2192 dcb_ieee_delapp(dev, app); 2193 return err; 2194 } 2195 2196 return 0; 2197 } 2198 2199 /* Update the DSCP prio entries on all user ports of the switch in case 2200 * the switch supports global DSCP prio instead of per port DSCP prios. 2201 */ 2202 static int dsa_user_dcbnl_ieee_global_dscp_setdel(struct net_device *dev, 2203 struct dcb_app *app, bool del) 2204 { 2205 int (*setdel)(struct net_device *dev, struct dcb_app *app); 2206 struct dsa_port *dp = dsa_user_to_port(dev); 2207 struct dsa_switch *ds = dp->ds; 2208 struct dsa_port *other_dp; 2209 int err, restore_err; 2210 2211 if (del) 2212 setdel = dcb_ieee_delapp; 2213 else 2214 setdel = dcb_ieee_setapp; 2215 2216 dsa_switch_for_each_user_port(other_dp, ds) { 2217 struct net_device *user = other_dp->user; 2218 2219 if (!user || user == dev) 2220 continue; 2221 2222 err = setdel(user, app); 2223 if (err) 2224 goto err_try_to_restore; 2225 } 2226 2227 return 0; 2228 2229 err_try_to_restore: 2230 2231 /* Revert logic to restore previous state of app entries */ 2232 if (!del) 2233 setdel = dcb_ieee_delapp; 2234 else 2235 setdel = dcb_ieee_setapp; 2236 2237 dsa_switch_for_each_user_port_continue_reverse(other_dp, ds) { 2238 struct net_device *user = other_dp->user; 2239 2240 if (!user || user == dev) 2241 continue; 2242 2243 restore_err = setdel(user, app); 2244 if (restore_err) 2245 netdev_err(user, "Failed to restore DSCP prio entry configuration\n"); 2246 } 2247 2248 return err; 2249 } 2250 2251 static int __maybe_unused 2252 dsa_user_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 2253 { 2254 struct dsa_port *dp = dsa_user_to_port(dev); 2255 struct dsa_switch *ds = dp->ds; 2256 unsigned long mask, new_prio; 2257 int err, port = dp->index; 2258 u8 dscp = app->protocol; 2259 2260 if (!ds->ops->port_add_dscp_prio) 2261 return -EOPNOTSUPP; 2262 2263 if (dscp >= 64) { 2264 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 2265 dscp); 2266 return -EINVAL; 2267 } 2268 2269 err = dcb_ieee_setapp(dev, app); 2270 if (err) 2271 return err; 2272 2273 mask = dcb_ieee_getapp_mask(dev, app); 2274 new_prio = __fls(mask); 2275 2276 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 2277 if (err) { 2278 dcb_ieee_delapp(dev, app); 2279 return err; 2280 } 2281 2282 if (!ds->dscp_prio_mapping_is_global) 2283 return 0; 2284 2285 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, false); 2286 if (err) { 2287 if (ds->ops->port_del_dscp_prio) 2288 ds->ops->port_del_dscp_prio(ds, port, dscp, new_prio); 2289 dcb_ieee_delapp(dev, app); 2290 return err; 2291 } 2292 2293 return 0; 2294 } 2295 2296 static int __maybe_unused dsa_user_dcbnl_ieee_setapp(struct net_device *dev, 2297 struct dcb_app *app) 2298 { 2299 switch (app->selector) { 2300 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2301 switch (app->protocol) { 2302 case 0: 2303 return dsa_user_dcbnl_set_default_prio(dev, app); 2304 default: 2305 return -EOPNOTSUPP; 2306 } 2307 break; 2308 case IEEE_8021QAZ_APP_SEL_DSCP: 2309 return dsa_user_dcbnl_add_dscp_prio(dev, app); 2310 default: 2311 return -EOPNOTSUPP; 2312 } 2313 } 2314 2315 static int __maybe_unused 2316 dsa_user_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2317 { 2318 struct dsa_port *dp = dsa_user_to_port(dev); 2319 struct dsa_switch *ds = dp->ds; 2320 unsigned long mask, new_prio; 2321 int err, port = dp->index; 2322 2323 if (!ds->ops->port_set_default_prio) 2324 return -EOPNOTSUPP; 2325 2326 err = dcb_ieee_delapp(dev, app); 2327 if (err) 2328 return err; 2329 2330 mask = dcb_ieee_getapp_mask(dev, app); 2331 new_prio = mask ? __fls(mask) : 0; 2332 2333 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2334 if (err) { 2335 dcb_ieee_setapp(dev, app); 2336 return err; 2337 } 2338 2339 return 0; 2340 } 2341 2342 static int __maybe_unused 2343 dsa_user_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2344 { 2345 struct dsa_port *dp = dsa_user_to_port(dev); 2346 struct dsa_switch *ds = dp->ds; 2347 int err, port = dp->index; 2348 u8 dscp = app->protocol; 2349 2350 if (!ds->ops->port_del_dscp_prio) 2351 return -EOPNOTSUPP; 2352 2353 err = dcb_ieee_delapp(dev, app); 2354 if (err) 2355 return err; 2356 2357 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2358 if (err) { 2359 dcb_ieee_setapp(dev, app); 2360 return err; 2361 } 2362 2363 if (!ds->dscp_prio_mapping_is_global) 2364 return 0; 2365 2366 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, true); 2367 if (err) { 2368 if (ds->ops->port_add_dscp_prio) 2369 ds->ops->port_add_dscp_prio(ds, port, dscp, 2370 app->priority); 2371 dcb_ieee_setapp(dev, app); 2372 return err; 2373 } 2374 2375 return 0; 2376 } 2377 2378 static int __maybe_unused dsa_user_dcbnl_ieee_delapp(struct net_device *dev, 2379 struct dcb_app *app) 2380 { 2381 switch (app->selector) { 2382 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2383 switch (app->protocol) { 2384 case 0: 2385 return dsa_user_dcbnl_del_default_prio(dev, app); 2386 default: 2387 return -EOPNOTSUPP; 2388 } 2389 break; 2390 case IEEE_8021QAZ_APP_SEL_DSCP: 2391 return dsa_user_dcbnl_del_dscp_prio(dev, app); 2392 default: 2393 return -EOPNOTSUPP; 2394 } 2395 } 2396 2397 /* Pre-populate the DCB application priority table with the priorities 2398 * configured during switch setup, which we read from hardware here. 2399 */ 2400 static int dsa_user_dcbnl_init(struct net_device *dev) 2401 { 2402 struct dsa_port *dp = dsa_user_to_port(dev); 2403 struct dsa_switch *ds = dp->ds; 2404 int port = dp->index; 2405 int err; 2406 2407 if (ds->ops->port_get_default_prio) { 2408 int prio = ds->ops->port_get_default_prio(ds, port); 2409 struct dcb_app app = { 2410 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2411 .protocol = 0, 2412 .priority = prio, 2413 }; 2414 2415 if (prio < 0) 2416 return prio; 2417 2418 err = dcb_ieee_setapp(dev, &app); 2419 if (err) 2420 return err; 2421 } 2422 2423 if (ds->ops->port_get_dscp_prio) { 2424 int protocol; 2425 2426 for (protocol = 0; protocol < 64; protocol++) { 2427 struct dcb_app app = { 2428 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2429 .protocol = protocol, 2430 }; 2431 int prio; 2432 2433 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2434 if (prio == -EOPNOTSUPP) 2435 continue; 2436 if (prio < 0) 2437 return prio; 2438 2439 app.priority = prio; 2440 2441 err = dcb_ieee_setapp(dev, &app); 2442 if (err) 2443 return err; 2444 } 2445 } 2446 2447 return 0; 2448 } 2449 2450 static const struct ethtool_ops dsa_user_ethtool_ops = { 2451 .get_drvinfo = dsa_user_get_drvinfo, 2452 .get_regs_len = dsa_user_get_regs_len, 2453 .get_regs = dsa_user_get_regs, 2454 .nway_reset = dsa_user_nway_reset, 2455 .get_link = ethtool_op_get_link, 2456 .get_eeprom_len = dsa_user_get_eeprom_len, 2457 .get_eeprom = dsa_user_get_eeprom, 2458 .set_eeprom = dsa_user_set_eeprom, 2459 .get_strings = dsa_user_get_strings, 2460 .get_ethtool_stats = dsa_user_get_ethtool_stats, 2461 .get_sset_count = dsa_user_get_sset_count, 2462 .get_eth_phy_stats = dsa_user_get_eth_phy_stats, 2463 .get_eth_mac_stats = dsa_user_get_eth_mac_stats, 2464 .get_eth_ctrl_stats = dsa_user_get_eth_ctrl_stats, 2465 .get_rmon_stats = dsa_user_get_rmon_stats, 2466 .set_wol = dsa_user_set_wol, 2467 .get_wol = dsa_user_get_wol, 2468 .set_eee = dsa_user_set_eee, 2469 .get_eee = dsa_user_get_eee, 2470 .get_link_ksettings = dsa_user_get_link_ksettings, 2471 .set_link_ksettings = dsa_user_set_link_ksettings, 2472 .get_pause_stats = dsa_user_get_pause_stats, 2473 .get_pauseparam = dsa_user_get_pauseparam, 2474 .set_pauseparam = dsa_user_set_pauseparam, 2475 .get_rxnfc = dsa_user_get_rxnfc, 2476 .set_rxnfc = dsa_user_set_rxnfc, 2477 .get_ts_info = dsa_user_get_ts_info, 2478 .self_test = dsa_user_net_selftest, 2479 .get_mm = dsa_user_get_mm, 2480 .set_mm = dsa_user_set_mm, 2481 .get_mm_stats = dsa_user_get_mm_stats, 2482 }; 2483 2484 static const struct dcbnl_rtnl_ops __maybe_unused dsa_user_dcbnl_ops = { 2485 .ieee_setapp = dsa_user_dcbnl_ieee_setapp, 2486 .ieee_delapp = dsa_user_dcbnl_ieee_delapp, 2487 .dcbnl_setapptrust = dsa_user_dcbnl_set_apptrust, 2488 .dcbnl_getapptrust = dsa_user_dcbnl_get_apptrust, 2489 }; 2490 2491 static void dsa_user_get_stats64(struct net_device *dev, 2492 struct rtnl_link_stats64 *s) 2493 { 2494 struct dsa_port *dp = dsa_user_to_port(dev); 2495 struct dsa_switch *ds = dp->ds; 2496 2497 if (ds->ops->get_stats64) 2498 ds->ops->get_stats64(ds, dp->index, s); 2499 else 2500 dev_get_tstats64(dev, s); 2501 } 2502 2503 static int dsa_user_fill_forward_path(struct net_device_path_ctx *ctx, 2504 struct net_device_path *path) 2505 { 2506 struct dsa_port *dp = dsa_user_to_port(ctx->dev); 2507 struct net_device *conduit = dsa_port_to_conduit(dp); 2508 struct dsa_port *cpu_dp = dp->cpu_dp; 2509 2510 path->dev = ctx->dev; 2511 path->type = DEV_PATH_DSA; 2512 path->dsa.proto = cpu_dp->tag_ops->proto; 2513 path->dsa.port = dp->index; 2514 ctx->dev = conduit; 2515 2516 return 0; 2517 } 2518 2519 static const struct net_device_ops dsa_user_netdev_ops = { 2520 .ndo_open = dsa_user_open, 2521 .ndo_stop = dsa_user_close, 2522 .ndo_start_xmit = dsa_user_xmit, 2523 .ndo_change_rx_flags = dsa_user_change_rx_flags, 2524 .ndo_set_rx_mode = dsa_user_set_rx_mode, 2525 .ndo_set_mac_address = dsa_user_set_mac_address, 2526 .ndo_fdb_dump = dsa_user_fdb_dump, 2527 .ndo_eth_ioctl = dsa_user_ioctl, 2528 .ndo_get_iflink = dsa_user_get_iflink, 2529 #ifdef CONFIG_NET_POLL_CONTROLLER 2530 .ndo_netpoll_setup = dsa_user_netpoll_setup, 2531 .ndo_netpoll_cleanup = dsa_user_netpoll_cleanup, 2532 .ndo_poll_controller = dsa_user_poll_controller, 2533 #endif 2534 .ndo_setup_tc = dsa_user_setup_tc, 2535 .ndo_get_stats64 = dsa_user_get_stats64, 2536 .ndo_vlan_rx_add_vid = dsa_user_vlan_rx_add_vid, 2537 .ndo_vlan_rx_kill_vid = dsa_user_vlan_rx_kill_vid, 2538 .ndo_change_mtu = dsa_user_change_mtu, 2539 .ndo_fill_forward_path = dsa_user_fill_forward_path, 2540 }; 2541 2542 static const struct device_type dsa_type = { 2543 .name = "dsa", 2544 }; 2545 2546 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2547 { 2548 const struct dsa_port *dp = dsa_to_port(ds, port); 2549 2550 if (dp->pl) 2551 phylink_mac_change(dp->pl, up); 2552 } 2553 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2554 2555 static void dsa_user_phylink_fixed_state(struct phylink_config *config, 2556 struct phylink_link_state *state) 2557 { 2558 struct dsa_port *dp = dsa_phylink_to_port(config); 2559 struct dsa_switch *ds = dp->ds; 2560 2561 /* No need to check that this operation is valid, the callback would 2562 * not be called if it was not. 2563 */ 2564 ds->ops->phylink_fixed_state(ds, dp->index, state); 2565 } 2566 2567 /* user device setup *******************************************************/ 2568 static int dsa_user_phy_connect(struct net_device *user_dev, int addr, 2569 u32 flags) 2570 { 2571 struct dsa_port *dp = dsa_user_to_port(user_dev); 2572 struct dsa_switch *ds = dp->ds; 2573 2574 user_dev->phydev = mdiobus_get_phy(ds->user_mii_bus, addr); 2575 if (!user_dev->phydev) { 2576 netdev_err(user_dev, "no phy at %d\n", addr); 2577 return -ENODEV; 2578 } 2579 2580 user_dev->phydev->dev_flags |= flags; 2581 2582 return phylink_connect_phy(dp->pl, user_dev->phydev); 2583 } 2584 2585 static int dsa_user_phy_setup(struct net_device *user_dev) 2586 { 2587 struct dsa_port *dp = dsa_user_to_port(user_dev); 2588 struct device_node *port_dn = dp->dn; 2589 struct dsa_switch *ds = dp->ds; 2590 u32 phy_flags = 0; 2591 int ret; 2592 2593 dp->pl_config.dev = &user_dev->dev; 2594 dp->pl_config.type = PHYLINK_NETDEV; 2595 2596 /* The get_fixed_state callback takes precedence over polling the 2597 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2598 * this if the switch provides such a callback. 2599 */ 2600 if (ds->ops->phylink_fixed_state) { 2601 dp->pl_config.get_fixed_state = dsa_user_phylink_fixed_state; 2602 dp->pl_config.poll_fixed_state = true; 2603 } 2604 2605 ret = dsa_port_phylink_create(dp); 2606 if (ret) 2607 return ret; 2608 2609 if (ds->ops->get_phy_flags) 2610 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2611 2612 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2613 if (ret == -ENODEV && ds->user_mii_bus) { 2614 /* We could not connect to a designated PHY or SFP, so try to 2615 * use the switch internal MDIO bus instead 2616 */ 2617 ret = dsa_user_phy_connect(user_dev, dp->index, phy_flags); 2618 } 2619 if (ret) { 2620 netdev_err(user_dev, "failed to connect to PHY: %pe\n", 2621 ERR_PTR(ret)); 2622 dsa_port_phylink_destroy(dp); 2623 } 2624 2625 return ret; 2626 } 2627 2628 void dsa_user_setup_tagger(struct net_device *user) 2629 { 2630 struct dsa_port *dp = dsa_user_to_port(user); 2631 struct net_device *conduit = dsa_port_to_conduit(dp); 2632 struct dsa_user_priv *p = netdev_priv(user); 2633 const struct dsa_port *cpu_dp = dp->cpu_dp; 2634 const struct dsa_switch *ds = dp->ds; 2635 2636 user->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2637 user->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2638 /* Try to save one extra realloc later in the TX path (in the conduit) 2639 * by also inheriting the conduit's needed headroom and tailroom. 2640 * The 8021q driver also does this. 2641 */ 2642 user->needed_headroom += conduit->needed_headroom; 2643 user->needed_tailroom += conduit->needed_tailroom; 2644 2645 p->xmit = cpu_dp->tag_ops->xmit; 2646 2647 user->features = conduit->vlan_features | NETIF_F_HW_TC; 2648 user->hw_features |= NETIF_F_HW_TC; 2649 if (user->needed_tailroom) 2650 user->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2651 if (ds->needs_standalone_vlan_filtering) 2652 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2653 2654 user->lltx = true; 2655 } 2656 2657 int dsa_user_suspend(struct net_device *user_dev) 2658 { 2659 struct dsa_port *dp = dsa_user_to_port(user_dev); 2660 2661 if (!netif_running(user_dev)) 2662 return 0; 2663 2664 netif_device_detach(user_dev); 2665 2666 rtnl_lock(); 2667 phylink_stop(dp->pl); 2668 rtnl_unlock(); 2669 2670 return 0; 2671 } 2672 2673 int dsa_user_resume(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_attach(user_dev); 2681 2682 rtnl_lock(); 2683 phylink_start(dp->pl); 2684 rtnl_unlock(); 2685 2686 return 0; 2687 } 2688 2689 int dsa_user_create(struct dsa_port *port) 2690 { 2691 struct net_device *conduit = dsa_port_to_conduit(port); 2692 struct dsa_switch *ds = port->ds; 2693 struct net_device *user_dev; 2694 struct dsa_user_priv *p; 2695 const char *name; 2696 int assign_type; 2697 int ret; 2698 2699 if (!ds->num_tx_queues) 2700 ds->num_tx_queues = 1; 2701 2702 if (port->name) { 2703 name = port->name; 2704 assign_type = NET_NAME_PREDICTABLE; 2705 } else { 2706 name = "eth%d"; 2707 assign_type = NET_NAME_ENUM; 2708 } 2709 2710 user_dev = alloc_netdev_mqs(sizeof(struct dsa_user_priv), name, 2711 assign_type, ether_setup, 2712 ds->num_tx_queues, 1); 2713 if (user_dev == NULL) 2714 return -ENOMEM; 2715 2716 user_dev->rtnl_link_ops = &dsa_link_ops; 2717 user_dev->ethtool_ops = &dsa_user_ethtool_ops; 2718 #if IS_ENABLED(CONFIG_DCB) 2719 user_dev->dcbnl_ops = &dsa_user_dcbnl_ops; 2720 #endif 2721 if (!is_zero_ether_addr(port->mac)) 2722 eth_hw_addr_set(user_dev, port->mac); 2723 else 2724 eth_hw_addr_inherit(user_dev, conduit); 2725 user_dev->priv_flags |= IFF_NO_QUEUE; 2726 if (dsa_switch_supports_uc_filtering(ds)) 2727 user_dev->priv_flags |= IFF_UNICAST_FLT; 2728 user_dev->netdev_ops = &dsa_user_netdev_ops; 2729 if (ds->ops->port_max_mtu) 2730 user_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2731 SET_NETDEV_DEVTYPE(user_dev, &dsa_type); 2732 2733 SET_NETDEV_DEV(user_dev, port->ds->dev); 2734 SET_NETDEV_DEVLINK_PORT(user_dev, &port->devlink_port); 2735 user_dev->dev.of_node = port->dn; 2736 user_dev->vlan_features = conduit->vlan_features; 2737 2738 p = netdev_priv(user_dev); 2739 user_dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2740 2741 ret = gro_cells_init(&p->gcells, user_dev); 2742 if (ret) 2743 goto out_free; 2744 2745 p->dp = port; 2746 INIT_LIST_HEAD(&p->mall_tc_list); 2747 port->user = user_dev; 2748 dsa_user_setup_tagger(user_dev); 2749 2750 netif_carrier_off(user_dev); 2751 2752 ret = dsa_user_phy_setup(user_dev); 2753 if (ret) { 2754 netdev_err(user_dev, 2755 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2756 ret, ds->dst->index, ds->index, port->index); 2757 goto out_gcells; 2758 } 2759 2760 rtnl_lock(); 2761 2762 ret = dsa_user_change_mtu(user_dev, ETH_DATA_LEN); 2763 if (ret && ret != -EOPNOTSUPP) 2764 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2765 ret, ETH_DATA_LEN, port->index); 2766 2767 ret = register_netdevice(user_dev); 2768 if (ret) { 2769 netdev_err(conduit, "error %d registering interface %s\n", 2770 ret, user_dev->name); 2771 rtnl_unlock(); 2772 goto out_phy; 2773 } 2774 2775 if (IS_ENABLED(CONFIG_DCB)) { 2776 ret = dsa_user_dcbnl_init(user_dev); 2777 if (ret) { 2778 netdev_err(user_dev, 2779 "failed to initialize DCB: %pe\n", 2780 ERR_PTR(ret)); 2781 rtnl_unlock(); 2782 goto out_unregister; 2783 } 2784 } 2785 2786 ret = netdev_upper_dev_link(conduit, user_dev, NULL); 2787 2788 rtnl_unlock(); 2789 2790 if (ret) 2791 goto out_unregister; 2792 2793 return 0; 2794 2795 out_unregister: 2796 unregister_netdev(user_dev); 2797 out_phy: 2798 rtnl_lock(); 2799 phylink_disconnect_phy(p->dp->pl); 2800 rtnl_unlock(); 2801 dsa_port_phylink_destroy(p->dp); 2802 out_gcells: 2803 gro_cells_destroy(&p->gcells); 2804 out_free: 2805 free_netdev(user_dev); 2806 port->user = NULL; 2807 return ret; 2808 } 2809 2810 void dsa_user_destroy(struct net_device *user_dev) 2811 { 2812 struct net_device *conduit = dsa_user_to_conduit(user_dev); 2813 struct dsa_port *dp = dsa_user_to_port(user_dev); 2814 struct dsa_user_priv *p = netdev_priv(user_dev); 2815 2816 netif_carrier_off(user_dev); 2817 rtnl_lock(); 2818 netdev_upper_dev_unlink(conduit, user_dev); 2819 unregister_netdevice(user_dev); 2820 phylink_disconnect_phy(dp->pl); 2821 rtnl_unlock(); 2822 2823 dsa_port_phylink_destroy(dp); 2824 gro_cells_destroy(&p->gcells); 2825 free_netdev(user_dev); 2826 } 2827 2828 int dsa_user_change_conduit(struct net_device *dev, struct net_device *conduit, 2829 struct netlink_ext_ack *extack) 2830 { 2831 struct net_device *old_conduit = dsa_user_to_conduit(dev); 2832 struct dsa_port *dp = dsa_user_to_port(dev); 2833 struct dsa_switch *ds = dp->ds; 2834 struct net_device *upper; 2835 struct list_head *iter; 2836 int err; 2837 2838 if (conduit == old_conduit) 2839 return 0; 2840 2841 if (!ds->ops->port_change_conduit) { 2842 NL_SET_ERR_MSG_MOD(extack, 2843 "Driver does not support changing DSA conduit"); 2844 return -EOPNOTSUPP; 2845 } 2846 2847 if (!netdev_uses_dsa(conduit)) { 2848 NL_SET_ERR_MSG_MOD(extack, 2849 "Interface not eligible as DSA conduit"); 2850 return -EOPNOTSUPP; 2851 } 2852 2853 netdev_for_each_upper_dev_rcu(conduit, upper, iter) { 2854 if (dsa_user_dev_check(upper)) 2855 continue; 2856 if (netif_is_bridge_master(upper)) 2857 continue; 2858 NL_SET_ERR_MSG_MOD(extack, "Cannot join conduit with unknown uppers"); 2859 return -EOPNOTSUPP; 2860 } 2861 2862 /* Since we allow live-changing the DSA conduit, plus we auto-open the 2863 * DSA conduit when the user port opens => we need to ensure that the 2864 * new DSA conduit is open too. 2865 */ 2866 if (dev->flags & IFF_UP) { 2867 err = dev_open(conduit, extack); 2868 if (err) 2869 return err; 2870 } 2871 2872 netdev_upper_dev_unlink(old_conduit, dev); 2873 2874 err = netdev_upper_dev_link(conduit, dev, extack); 2875 if (err) 2876 goto out_revert_old_conduit_unlink; 2877 2878 err = dsa_port_change_conduit(dp, conduit, extack); 2879 if (err) 2880 goto out_revert_conduit_link; 2881 2882 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2883 err = dsa_user_change_mtu(dev, dev->mtu); 2884 if (err && err != -EOPNOTSUPP) { 2885 netdev_warn(dev, 2886 "nonfatal error updating MTU with new conduit: %pe\n", 2887 ERR_PTR(err)); 2888 } 2889 2890 return 0; 2891 2892 out_revert_conduit_link: 2893 netdev_upper_dev_unlink(conduit, dev); 2894 out_revert_old_conduit_unlink: 2895 netdev_upper_dev_link(old_conduit, dev, NULL); 2896 return err; 2897 } 2898 2899 bool dsa_user_dev_check(const struct net_device *dev) 2900 { 2901 return dev->netdev_ops == &dsa_user_netdev_ops; 2902 } 2903 EXPORT_SYMBOL_GPL(dsa_user_dev_check); 2904 2905 static int dsa_user_changeupper(struct net_device *dev, 2906 struct netdev_notifier_changeupper_info *info) 2907 { 2908 struct netlink_ext_ack *extack; 2909 int err = NOTIFY_DONE; 2910 struct dsa_port *dp; 2911 2912 if (!dsa_user_dev_check(dev)) 2913 return err; 2914 2915 dp = dsa_user_to_port(dev); 2916 extack = netdev_notifier_info_to_extack(&info->info); 2917 2918 if (netif_is_bridge_master(info->upper_dev)) { 2919 if (info->linking) { 2920 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2921 if (!err) 2922 dsa_bridge_mtu_normalization(dp); 2923 if (err == -EOPNOTSUPP) { 2924 NL_SET_ERR_MSG_WEAK_MOD(extack, 2925 "Offloading not supported"); 2926 err = 0; 2927 } 2928 err = notifier_from_errno(err); 2929 } else { 2930 dsa_port_bridge_leave(dp, info->upper_dev); 2931 err = NOTIFY_OK; 2932 } 2933 } else if (netif_is_lag_master(info->upper_dev)) { 2934 if (info->linking) { 2935 err = dsa_port_lag_join(dp, info->upper_dev, 2936 info->upper_info, extack); 2937 if (err == -EOPNOTSUPP) { 2938 NL_SET_ERR_MSG_WEAK_MOD(extack, 2939 "Offloading not supported"); 2940 err = 0; 2941 } 2942 err = notifier_from_errno(err); 2943 } else { 2944 dsa_port_lag_leave(dp, info->upper_dev); 2945 err = NOTIFY_OK; 2946 } 2947 } else if (is_hsr_master(info->upper_dev)) { 2948 if (info->linking) { 2949 err = dsa_port_hsr_join(dp, info->upper_dev, extack); 2950 if (err == -EOPNOTSUPP) { 2951 NL_SET_ERR_MSG_WEAK_MOD(extack, 2952 "Offloading not supported"); 2953 err = 0; 2954 } 2955 err = notifier_from_errno(err); 2956 } else { 2957 dsa_port_hsr_leave(dp, info->upper_dev); 2958 err = NOTIFY_OK; 2959 } 2960 } 2961 2962 return err; 2963 } 2964 2965 static int dsa_user_prechangeupper(struct net_device *dev, 2966 struct netdev_notifier_changeupper_info *info) 2967 { 2968 struct dsa_port *dp; 2969 2970 if (!dsa_user_dev_check(dev)) 2971 return NOTIFY_DONE; 2972 2973 dp = dsa_user_to_port(dev); 2974 2975 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2976 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2977 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2978 dsa_port_pre_lag_leave(dp, info->upper_dev); 2979 /* dsa_port_pre_hsr_leave is not yet necessary since hsr devices cannot 2980 * meaningfully placed under a bridge yet 2981 */ 2982 2983 return NOTIFY_DONE; 2984 } 2985 2986 static int 2987 dsa_user_lag_changeupper(struct net_device *dev, 2988 struct netdev_notifier_changeupper_info *info) 2989 { 2990 struct net_device *lower; 2991 struct list_head *iter; 2992 int err = NOTIFY_DONE; 2993 struct dsa_port *dp; 2994 2995 if (!netif_is_lag_master(dev)) 2996 return err; 2997 2998 netdev_for_each_lower_dev(dev, lower, iter) { 2999 if (!dsa_user_dev_check(lower)) 3000 continue; 3001 3002 dp = dsa_user_to_port(lower); 3003 if (!dp->lag) 3004 /* Software LAG */ 3005 continue; 3006 3007 err = dsa_user_changeupper(lower, info); 3008 if (notifier_to_errno(err)) 3009 break; 3010 } 3011 3012 return err; 3013 } 3014 3015 /* Same as dsa_user_lag_changeupper() except that it calls 3016 * dsa_user_prechangeupper() 3017 */ 3018 static int 3019 dsa_user_lag_prechangeupper(struct net_device *dev, 3020 struct netdev_notifier_changeupper_info *info) 3021 { 3022 struct net_device *lower; 3023 struct list_head *iter; 3024 int err = NOTIFY_DONE; 3025 struct dsa_port *dp; 3026 3027 if (!netif_is_lag_master(dev)) 3028 return err; 3029 3030 netdev_for_each_lower_dev(dev, lower, iter) { 3031 if (!dsa_user_dev_check(lower)) 3032 continue; 3033 3034 dp = dsa_user_to_port(lower); 3035 if (!dp->lag) 3036 /* Software LAG */ 3037 continue; 3038 3039 err = dsa_user_prechangeupper(lower, info); 3040 if (notifier_to_errno(err)) 3041 break; 3042 } 3043 3044 return err; 3045 } 3046 3047 static int 3048 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 3049 struct netdev_notifier_changeupper_info *info) 3050 { 3051 struct netlink_ext_ack *ext_ack; 3052 struct net_device *user, *br; 3053 struct dsa_port *dp; 3054 3055 ext_ack = netdev_notifier_info_to_extack(&info->info); 3056 3057 if (!is_vlan_dev(dev)) 3058 return NOTIFY_DONE; 3059 3060 user = vlan_dev_real_dev(dev); 3061 if (!dsa_user_dev_check(user)) 3062 return NOTIFY_DONE; 3063 3064 dp = dsa_user_to_port(user); 3065 br = dsa_port_bridge_dev_get(dp); 3066 if (!br) 3067 return NOTIFY_DONE; 3068 3069 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 3070 if (br_vlan_enabled(br) && 3071 netif_is_bridge_master(info->upper_dev) && info->linking) { 3072 NL_SET_ERR_MSG_MOD(ext_ack, 3073 "Cannot make VLAN device join VLAN-aware bridge"); 3074 return notifier_from_errno(-EINVAL); 3075 } 3076 3077 return NOTIFY_DONE; 3078 } 3079 3080 static int 3081 dsa_user_check_8021q_upper(struct net_device *dev, 3082 struct netdev_notifier_changeupper_info *info) 3083 { 3084 struct dsa_port *dp = dsa_user_to_port(dev); 3085 struct net_device *br = dsa_port_bridge_dev_get(dp); 3086 struct bridge_vlan_info br_info; 3087 struct netlink_ext_ack *extack; 3088 int err = NOTIFY_DONE; 3089 u16 vid; 3090 3091 if (!br || !br_vlan_enabled(br)) 3092 return NOTIFY_DONE; 3093 3094 extack = netdev_notifier_info_to_extack(&info->info); 3095 vid = vlan_dev_vlan_id(info->upper_dev); 3096 3097 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 3098 * device, respectively the VID is not found, returning 3099 * 0 means success, which is a failure for us here. 3100 */ 3101 err = br_vlan_get_info(br, vid, &br_info); 3102 if (err == 0) { 3103 NL_SET_ERR_MSG_MOD(extack, 3104 "This VLAN is already configured by the bridge"); 3105 return notifier_from_errno(-EBUSY); 3106 } 3107 3108 return NOTIFY_DONE; 3109 } 3110 3111 static int 3112 dsa_user_prechangeupper_sanity_check(struct net_device *dev, 3113 struct netdev_notifier_changeupper_info *info) 3114 { 3115 struct dsa_switch *ds; 3116 struct dsa_port *dp; 3117 int err; 3118 3119 if (!dsa_user_dev_check(dev)) 3120 return dsa_prevent_bridging_8021q_upper(dev, info); 3121 3122 dp = dsa_user_to_port(dev); 3123 ds = dp->ds; 3124 3125 if (ds->ops->port_prechangeupper) { 3126 err = ds->ops->port_prechangeupper(ds, dp->index, info); 3127 if (err) 3128 return notifier_from_errno(err); 3129 } 3130 3131 if (is_vlan_dev(info->upper_dev)) 3132 return dsa_user_check_8021q_upper(dev, info); 3133 3134 return NOTIFY_DONE; 3135 } 3136 3137 /* To be eligible as a DSA conduit, a LAG must have all lower interfaces be 3138 * eligible DSA conduits. Additionally, all LAG slaves must be DSA conduits of 3139 * switches in the same switch tree. 3140 */ 3141 static int dsa_lag_conduit_validate(struct net_device *lag_dev, 3142 struct netlink_ext_ack *extack) 3143 { 3144 struct net_device *lower1, *lower2; 3145 struct list_head *iter1, *iter2; 3146 3147 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 3148 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 3149 if (!netdev_uses_dsa(lower1) || 3150 !netdev_uses_dsa(lower2)) { 3151 NL_SET_ERR_MSG_MOD(extack, 3152 "All LAG ports must be eligible as DSA conduits"); 3153 return notifier_from_errno(-EINVAL); 3154 } 3155 3156 if (lower1 == lower2) 3157 continue; 3158 3159 if (!dsa_port_tree_same(lower1->dsa_ptr, 3160 lower2->dsa_ptr)) { 3161 NL_SET_ERR_MSG_MOD(extack, 3162 "LAG contains DSA conduits of disjoint switch trees"); 3163 return notifier_from_errno(-EINVAL); 3164 } 3165 } 3166 } 3167 3168 return NOTIFY_DONE; 3169 } 3170 3171 static int 3172 dsa_conduit_prechangeupper_sanity_check(struct net_device *conduit, 3173 struct netdev_notifier_changeupper_info *info) 3174 { 3175 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3176 3177 if (!netdev_uses_dsa(conduit)) 3178 return NOTIFY_DONE; 3179 3180 if (!info->linking) 3181 return NOTIFY_DONE; 3182 3183 /* Allow DSA switch uppers */ 3184 if (dsa_user_dev_check(info->upper_dev)) 3185 return NOTIFY_DONE; 3186 3187 /* Allow bridge uppers of DSA conduits, subject to further 3188 * restrictions in dsa_bridge_prechangelower_sanity_check() 3189 */ 3190 if (netif_is_bridge_master(info->upper_dev)) 3191 return NOTIFY_DONE; 3192 3193 /* Allow LAG uppers, subject to further restrictions in 3194 * dsa_lag_conduit_prechangelower_sanity_check() 3195 */ 3196 if (netif_is_lag_master(info->upper_dev)) 3197 return dsa_lag_conduit_validate(info->upper_dev, extack); 3198 3199 NL_SET_ERR_MSG_MOD(extack, 3200 "DSA conduit cannot join unknown upper interfaces"); 3201 return notifier_from_errno(-EBUSY); 3202 } 3203 3204 static int 3205 dsa_lag_conduit_prechangelower_sanity_check(struct net_device *dev, 3206 struct netdev_notifier_changeupper_info *info) 3207 { 3208 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3209 struct net_device *lag_dev = info->upper_dev; 3210 struct net_device *lower; 3211 struct list_head *iter; 3212 3213 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 3214 return NOTIFY_DONE; 3215 3216 if (!info->linking) 3217 return NOTIFY_DONE; 3218 3219 if (!netdev_uses_dsa(dev)) { 3220 NL_SET_ERR_MSG(extack, 3221 "Only DSA conduits can join a LAG DSA conduit"); 3222 return notifier_from_errno(-EINVAL); 3223 } 3224 3225 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3226 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 3227 NL_SET_ERR_MSG(extack, 3228 "Interface is DSA conduit for a different switch tree than this LAG"); 3229 return notifier_from_errno(-EINVAL); 3230 } 3231 3232 break; 3233 } 3234 3235 return NOTIFY_DONE; 3236 } 3237 3238 /* Don't allow bridging of DSA conduits, since the bridge layer rx_handler 3239 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 3240 * chance to strip off and parse the DSA switch tag protocol header (the bridge 3241 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 3242 * frames). 3243 * The only case where that would not be an issue is when bridging can already 3244 * be offloaded, such as when the DSA conduit is itself a DSA or plain switchdev 3245 * port, and is bridged only with other ports from the same hardware device. 3246 */ 3247 static int 3248 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 3249 struct netdev_notifier_changeupper_info *info) 3250 { 3251 struct net_device *br = info->upper_dev; 3252 struct netlink_ext_ack *extack; 3253 struct net_device *lower; 3254 struct list_head *iter; 3255 3256 if (!netif_is_bridge_master(br)) 3257 return NOTIFY_DONE; 3258 3259 if (!info->linking) 3260 return NOTIFY_DONE; 3261 3262 extack = netdev_notifier_info_to_extack(&info->info); 3263 3264 netdev_for_each_lower_dev(br, lower, iter) { 3265 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 3266 continue; 3267 3268 if (!netdev_port_same_parent_id(lower, new_lower)) { 3269 NL_SET_ERR_MSG(extack, 3270 "Cannot do software bridging with a DSA conduit"); 3271 return notifier_from_errno(-EINVAL); 3272 } 3273 } 3274 3275 return NOTIFY_DONE; 3276 } 3277 3278 static void dsa_tree_migrate_ports_from_lag_conduit(struct dsa_switch_tree *dst, 3279 struct net_device *lag_dev) 3280 { 3281 struct net_device *new_conduit = dsa_tree_find_first_conduit(dst); 3282 struct dsa_port *dp; 3283 int err; 3284 3285 dsa_tree_for_each_user_port(dp, dst) { 3286 if (dsa_port_to_conduit(dp) != lag_dev) 3287 continue; 3288 3289 err = dsa_user_change_conduit(dp->user, new_conduit, NULL); 3290 if (err) { 3291 netdev_err(dp->user, 3292 "failed to restore conduit to %s: %pe\n", 3293 new_conduit->name, ERR_PTR(err)); 3294 } 3295 } 3296 } 3297 3298 static int dsa_conduit_lag_join(struct net_device *conduit, 3299 struct net_device *lag_dev, 3300 struct netdev_lag_upper_info *uinfo, 3301 struct netlink_ext_ack *extack) 3302 { 3303 struct dsa_port *cpu_dp = conduit->dsa_ptr; 3304 struct dsa_switch_tree *dst = cpu_dp->dst; 3305 struct dsa_port *dp; 3306 int err; 3307 3308 err = dsa_conduit_lag_setup(lag_dev, cpu_dp, uinfo, extack); 3309 if (err) 3310 return err; 3311 3312 dsa_tree_for_each_user_port(dp, dst) { 3313 if (dsa_port_to_conduit(dp) != conduit) 3314 continue; 3315 3316 err = dsa_user_change_conduit(dp->user, lag_dev, extack); 3317 if (err) 3318 goto restore; 3319 } 3320 3321 return 0; 3322 3323 restore: 3324 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3325 if (dsa_port_to_conduit(dp) != lag_dev) 3326 continue; 3327 3328 err = dsa_user_change_conduit(dp->user, conduit, NULL); 3329 if (err) { 3330 netdev_err(dp->user, 3331 "failed to restore conduit to %s: %pe\n", 3332 conduit->name, ERR_PTR(err)); 3333 } 3334 } 3335 3336 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3337 3338 return err; 3339 } 3340 3341 static void dsa_conduit_lag_leave(struct net_device *conduit, 3342 struct net_device *lag_dev) 3343 { 3344 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3345 struct dsa_switch_tree *dst = cpu_dp->dst; 3346 struct dsa_port *new_cpu_dp = NULL; 3347 struct net_device *lower; 3348 struct list_head *iter; 3349 3350 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3351 if (netdev_uses_dsa(lower)) { 3352 new_cpu_dp = lower->dsa_ptr; 3353 break; 3354 } 3355 } 3356 3357 if (new_cpu_dp) { 3358 /* Update the CPU port of the user ports still under the LAG 3359 * so that dsa_port_to_conduit() continues to work properly 3360 */ 3361 dsa_tree_for_each_user_port(dp, dst) 3362 if (dsa_port_to_conduit(dp) == lag_dev) 3363 dp->cpu_dp = new_cpu_dp; 3364 3365 /* Update the index of the virtual CPU port to match the lowest 3366 * physical CPU port 3367 */ 3368 lag_dev->dsa_ptr = new_cpu_dp; 3369 wmb(); 3370 } else { 3371 /* If the LAG DSA conduit has no ports left, migrate back all 3372 * user ports to the first physical CPU port 3373 */ 3374 dsa_tree_migrate_ports_from_lag_conduit(dst, lag_dev); 3375 } 3376 3377 /* This DSA conduit has left its LAG in any case, so let 3378 * the CPU port leave the hardware LAG as well 3379 */ 3380 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3381 } 3382 3383 static int dsa_conduit_changeupper(struct net_device *dev, 3384 struct netdev_notifier_changeupper_info *info) 3385 { 3386 struct netlink_ext_ack *extack; 3387 int err = NOTIFY_DONE; 3388 3389 if (!netdev_uses_dsa(dev)) 3390 return err; 3391 3392 extack = netdev_notifier_info_to_extack(&info->info); 3393 3394 if (netif_is_lag_master(info->upper_dev)) { 3395 if (info->linking) { 3396 err = dsa_conduit_lag_join(dev, info->upper_dev, 3397 info->upper_info, extack); 3398 err = notifier_from_errno(err); 3399 } else { 3400 dsa_conduit_lag_leave(dev, info->upper_dev); 3401 err = NOTIFY_OK; 3402 } 3403 } 3404 3405 return err; 3406 } 3407 3408 static int dsa_user_netdevice_event(struct notifier_block *nb, 3409 unsigned long event, void *ptr) 3410 { 3411 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3412 3413 switch (event) { 3414 case NETDEV_PRECHANGEUPPER: { 3415 struct netdev_notifier_changeupper_info *info = ptr; 3416 int err; 3417 3418 err = dsa_user_prechangeupper_sanity_check(dev, info); 3419 if (notifier_to_errno(err)) 3420 return err; 3421 3422 err = dsa_conduit_prechangeupper_sanity_check(dev, info); 3423 if (notifier_to_errno(err)) 3424 return err; 3425 3426 err = dsa_lag_conduit_prechangelower_sanity_check(dev, info); 3427 if (notifier_to_errno(err)) 3428 return err; 3429 3430 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3431 if (notifier_to_errno(err)) 3432 return err; 3433 3434 err = dsa_user_prechangeupper(dev, ptr); 3435 if (notifier_to_errno(err)) 3436 return err; 3437 3438 err = dsa_user_lag_prechangeupper(dev, ptr); 3439 if (notifier_to_errno(err)) 3440 return err; 3441 3442 break; 3443 } 3444 case NETDEV_CHANGEUPPER: { 3445 int err; 3446 3447 err = dsa_user_changeupper(dev, ptr); 3448 if (notifier_to_errno(err)) 3449 return err; 3450 3451 err = dsa_user_lag_changeupper(dev, ptr); 3452 if (notifier_to_errno(err)) 3453 return err; 3454 3455 err = dsa_conduit_changeupper(dev, ptr); 3456 if (notifier_to_errno(err)) 3457 return err; 3458 3459 break; 3460 } 3461 case NETDEV_CHANGELOWERSTATE: { 3462 struct netdev_notifier_changelowerstate_info *info = ptr; 3463 struct dsa_port *dp; 3464 int err = 0; 3465 3466 if (dsa_user_dev_check(dev)) { 3467 dp = dsa_user_to_port(dev); 3468 3469 err = dsa_port_lag_change(dp, info->lower_state_info); 3470 } 3471 3472 /* Mirror LAG port events on DSA conduits that are in 3473 * a LAG towards their respective switch CPU ports 3474 */ 3475 if (netdev_uses_dsa(dev)) { 3476 dp = dev->dsa_ptr; 3477 3478 err = dsa_port_lag_change(dp, info->lower_state_info); 3479 } 3480 3481 return notifier_from_errno(err); 3482 } 3483 case NETDEV_CHANGE: 3484 case NETDEV_UP: { 3485 /* Track state of conduit port. 3486 * DSA driver may require the conduit port (and indirectly 3487 * the tagger) to be available for some special operation. 3488 */ 3489 if (netdev_uses_dsa(dev)) { 3490 struct dsa_port *cpu_dp = dev->dsa_ptr; 3491 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3492 3493 /* Track when the conduit port is UP */ 3494 dsa_tree_conduit_oper_state_change(dst, dev, 3495 netif_oper_up(dev)); 3496 3497 /* Track when the conduit port is ready and can accept 3498 * packet. 3499 * NETDEV_UP event is not enough to flag a port as ready. 3500 * We also have to wait for linkwatch_do_dev to dev_activate 3501 * and emit a NETDEV_CHANGE event. 3502 * We check if a conduit port is ready by checking if the dev 3503 * have a qdisc assigned and is not noop. 3504 */ 3505 dsa_tree_conduit_admin_state_change(dst, dev, 3506 !qdisc_tx_is_noop(dev)); 3507 3508 return NOTIFY_OK; 3509 } 3510 3511 return NOTIFY_DONE; 3512 } 3513 case NETDEV_GOING_DOWN: { 3514 struct dsa_port *dp, *cpu_dp; 3515 struct dsa_switch_tree *dst; 3516 LIST_HEAD(close_list); 3517 3518 if (!netdev_uses_dsa(dev)) 3519 return NOTIFY_DONE; 3520 3521 cpu_dp = dev->dsa_ptr; 3522 dst = cpu_dp->ds->dst; 3523 3524 dsa_tree_conduit_admin_state_change(dst, dev, false); 3525 3526 list_for_each_entry(dp, &dst->ports, list) { 3527 if (!dsa_port_is_user(dp)) 3528 continue; 3529 3530 if (dp->cpu_dp != cpu_dp) 3531 continue; 3532 3533 list_add(&dp->user->close_list, &close_list); 3534 } 3535 3536 dev_close_many(&close_list, true); 3537 3538 return NOTIFY_OK; 3539 } 3540 default: 3541 break; 3542 } 3543 3544 return NOTIFY_DONE; 3545 } 3546 3547 static void 3548 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3549 { 3550 struct switchdev_notifier_fdb_info info = {}; 3551 3552 info.addr = switchdev_work->addr; 3553 info.vid = switchdev_work->vid; 3554 info.offloaded = true; 3555 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3556 switchdev_work->orig_dev, &info.info, NULL); 3557 } 3558 3559 static void dsa_user_switchdev_event_work(struct work_struct *work) 3560 { 3561 struct dsa_switchdev_event_work *switchdev_work = 3562 container_of(work, struct dsa_switchdev_event_work, work); 3563 const unsigned char *addr = switchdev_work->addr; 3564 struct net_device *dev = switchdev_work->dev; 3565 u16 vid = switchdev_work->vid; 3566 struct dsa_switch *ds; 3567 struct dsa_port *dp; 3568 int err; 3569 3570 dp = dsa_user_to_port(dev); 3571 ds = dp->ds; 3572 3573 switch (switchdev_work->event) { 3574 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3575 if (switchdev_work->host_addr) 3576 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3577 else if (dp->lag) 3578 err = dsa_port_lag_fdb_add(dp, addr, vid); 3579 else 3580 err = dsa_port_fdb_add(dp, addr, vid); 3581 if (err) { 3582 dev_err(ds->dev, 3583 "port %d failed to add %pM vid %d to fdb: %d\n", 3584 dp->index, addr, vid, err); 3585 break; 3586 } 3587 dsa_fdb_offload_notify(switchdev_work); 3588 break; 3589 3590 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3591 if (switchdev_work->host_addr) 3592 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3593 else if (dp->lag) 3594 err = dsa_port_lag_fdb_del(dp, addr, vid); 3595 else 3596 err = dsa_port_fdb_del(dp, addr, vid); 3597 if (err) { 3598 dev_err(ds->dev, 3599 "port %d failed to delete %pM vid %d from fdb: %d\n", 3600 dp->index, addr, vid, err); 3601 } 3602 3603 break; 3604 } 3605 3606 kfree(switchdev_work); 3607 } 3608 3609 static bool dsa_foreign_dev_check(const struct net_device *dev, 3610 const struct net_device *foreign_dev) 3611 { 3612 const struct dsa_port *dp = dsa_user_to_port(dev); 3613 struct dsa_switch_tree *dst = dp->ds->dst; 3614 3615 if (netif_is_bridge_master(foreign_dev)) 3616 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3617 3618 if (netif_is_bridge_port(foreign_dev)) 3619 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3620 3621 /* Everything else is foreign */ 3622 return true; 3623 } 3624 3625 static int dsa_user_fdb_event(struct net_device *dev, 3626 struct net_device *orig_dev, 3627 unsigned long event, const void *ctx, 3628 const struct switchdev_notifier_fdb_info *fdb_info) 3629 { 3630 struct dsa_switchdev_event_work *switchdev_work; 3631 struct dsa_port *dp = dsa_user_to_port(dev); 3632 bool host_addr = fdb_info->is_local; 3633 struct dsa_switch *ds = dp->ds; 3634 3635 if (ctx && ctx != dp) 3636 return 0; 3637 3638 if (!dp->bridge) 3639 return 0; 3640 3641 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3642 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3643 return 0; 3644 3645 /* FDB entries learned by the software bridge or by foreign 3646 * bridge ports should be installed as host addresses only if 3647 * the driver requests assisted learning. 3648 */ 3649 if (!ds->assisted_learning_on_cpu_port) 3650 return 0; 3651 } 3652 3653 /* Also treat FDB entries on foreign interfaces bridged with us as host 3654 * addresses. 3655 */ 3656 if (dsa_foreign_dev_check(dev, orig_dev)) 3657 host_addr = true; 3658 3659 /* Check early that we're not doing work in vain. 3660 * Host addresses on LAG ports still require regular FDB ops, 3661 * since the CPU port isn't in a LAG. 3662 */ 3663 if (dp->lag && !host_addr) { 3664 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3665 return -EOPNOTSUPP; 3666 } else { 3667 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3668 return -EOPNOTSUPP; 3669 } 3670 3671 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3672 if (!switchdev_work) 3673 return -ENOMEM; 3674 3675 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3676 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3677 orig_dev->name, fdb_info->addr, fdb_info->vid, 3678 host_addr ? " as host address" : ""); 3679 3680 INIT_WORK(&switchdev_work->work, dsa_user_switchdev_event_work); 3681 switchdev_work->event = event; 3682 switchdev_work->dev = dev; 3683 switchdev_work->orig_dev = orig_dev; 3684 3685 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3686 switchdev_work->vid = fdb_info->vid; 3687 switchdev_work->host_addr = host_addr; 3688 3689 dsa_schedule_work(&switchdev_work->work); 3690 3691 return 0; 3692 } 3693 3694 /* Called under rcu_read_lock() */ 3695 static int dsa_user_switchdev_event(struct notifier_block *unused, 3696 unsigned long event, void *ptr) 3697 { 3698 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3699 int err; 3700 3701 switch (event) { 3702 case SWITCHDEV_PORT_ATTR_SET: 3703 err = switchdev_handle_port_attr_set(dev, ptr, 3704 dsa_user_dev_check, 3705 dsa_user_port_attr_set); 3706 return notifier_from_errno(err); 3707 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3708 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3709 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3710 dsa_user_dev_check, 3711 dsa_foreign_dev_check, 3712 dsa_user_fdb_event); 3713 return notifier_from_errno(err); 3714 default: 3715 return NOTIFY_DONE; 3716 } 3717 3718 return NOTIFY_OK; 3719 } 3720 3721 static int dsa_user_switchdev_blocking_event(struct notifier_block *unused, 3722 unsigned long event, void *ptr) 3723 { 3724 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3725 int err; 3726 3727 switch (event) { 3728 case SWITCHDEV_PORT_OBJ_ADD: 3729 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3730 dsa_user_dev_check, 3731 dsa_foreign_dev_check, 3732 dsa_user_port_obj_add); 3733 return notifier_from_errno(err); 3734 case SWITCHDEV_PORT_OBJ_DEL: 3735 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3736 dsa_user_dev_check, 3737 dsa_foreign_dev_check, 3738 dsa_user_port_obj_del); 3739 return notifier_from_errno(err); 3740 case SWITCHDEV_PORT_ATTR_SET: 3741 err = switchdev_handle_port_attr_set(dev, ptr, 3742 dsa_user_dev_check, 3743 dsa_user_port_attr_set); 3744 return notifier_from_errno(err); 3745 } 3746 3747 return NOTIFY_DONE; 3748 } 3749 3750 static struct notifier_block dsa_user_nb __read_mostly = { 3751 .notifier_call = dsa_user_netdevice_event, 3752 }; 3753 3754 struct notifier_block dsa_user_switchdev_notifier = { 3755 .notifier_call = dsa_user_switchdev_event, 3756 }; 3757 3758 struct notifier_block dsa_user_switchdev_blocking_notifier = { 3759 .notifier_call = dsa_user_switchdev_blocking_event, 3760 }; 3761 3762 int dsa_user_register_notifier(void) 3763 { 3764 struct notifier_block *nb; 3765 int err; 3766 3767 err = register_netdevice_notifier(&dsa_user_nb); 3768 if (err) 3769 return err; 3770 3771 err = register_switchdev_notifier(&dsa_user_switchdev_notifier); 3772 if (err) 3773 goto err_switchdev_nb; 3774 3775 nb = &dsa_user_switchdev_blocking_notifier; 3776 err = register_switchdev_blocking_notifier(nb); 3777 if (err) 3778 goto err_switchdev_blocking_nb; 3779 3780 return 0; 3781 3782 err_switchdev_blocking_nb: 3783 unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3784 err_switchdev_nb: 3785 unregister_netdevice_notifier(&dsa_user_nb); 3786 return err; 3787 } 3788 3789 void dsa_user_unregister_notifier(void) 3790 { 3791 struct notifier_block *nb; 3792 int err; 3793 3794 nb = &dsa_user_switchdev_blocking_notifier; 3795 err = unregister_switchdev_blocking_notifier(nb); 3796 if (err) 3797 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3798 3799 err = unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3800 if (err) 3801 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3802 3803 err = unregister_netdevice_notifier(&dsa_user_nb); 3804 if (err) 3805 pr_err("DSA: failed to unregister user notifier (%d)\n", err); 3806 } 3807