1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/dsa/user.c - user device handling 4 * Copyright (c) 2008-2009 Marvell Semiconductor 5 */ 6 7 #include <linux/list.h> 8 #include <linux/etherdevice.h> 9 #include <linux/netdevice.h> 10 #include <linux/phy.h> 11 #include <linux/phy_fixed.h> 12 #include <linux/phylink.h> 13 #include <linux/of_net.h> 14 #include <linux/of_mdio.h> 15 #include <linux/mdio.h> 16 #include <net/rtnetlink.h> 17 #include <net/pkt_cls.h> 18 #include <net/selftests.h> 19 #include <net/tc_act/tc_mirred.h> 20 #include <linux/if_bridge.h> 21 #include <linux/if_hsr.h> 22 #include <net/dcbnl.h> 23 #include <linux/netpoll.h> 24 #include <linux/string.h> 25 26 #include "conduit.h" 27 #include "dsa.h" 28 #include "netlink.h" 29 #include "port.h" 30 #include "switch.h" 31 #include "tag.h" 32 #include "user.h" 33 34 struct dsa_switchdev_event_work { 35 struct net_device *dev; 36 struct net_device *orig_dev; 37 struct work_struct work; 38 unsigned long event; 39 /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and 40 * SWITCHDEV_FDB_DEL_TO_DEVICE 41 */ 42 unsigned char addr[ETH_ALEN]; 43 u16 vid; 44 bool host_addr; 45 }; 46 47 enum dsa_standalone_event { 48 DSA_UC_ADD, 49 DSA_UC_DEL, 50 DSA_MC_ADD, 51 DSA_MC_DEL, 52 }; 53 54 struct dsa_standalone_event_work { 55 struct work_struct work; 56 struct net_device *dev; 57 enum dsa_standalone_event event; 58 unsigned char addr[ETH_ALEN]; 59 u16 vid; 60 }; 61 62 struct dsa_host_vlan_rx_filtering_ctx { 63 struct net_device *dev; 64 const unsigned char *addr; 65 enum dsa_standalone_event event; 66 }; 67 68 static bool dsa_switch_supports_uc_filtering(struct dsa_switch *ds) 69 { 70 return ds->ops->port_fdb_add && ds->ops->port_fdb_del && 71 ds->fdb_isolation && !ds->vlan_filtering_is_global && 72 !ds->needs_standalone_vlan_filtering; 73 } 74 75 static bool dsa_switch_supports_mc_filtering(struct dsa_switch *ds) 76 { 77 return ds->ops->port_mdb_add && ds->ops->port_mdb_del && 78 ds->fdb_isolation && !ds->vlan_filtering_is_global && 79 !ds->needs_standalone_vlan_filtering; 80 } 81 82 static void dsa_user_standalone_event_work(struct work_struct *work) 83 { 84 struct dsa_standalone_event_work *standalone_work = 85 container_of(work, struct dsa_standalone_event_work, work); 86 const unsigned char *addr = standalone_work->addr; 87 struct net_device *dev = standalone_work->dev; 88 struct dsa_port *dp = dsa_user_to_port(dev); 89 struct switchdev_obj_port_mdb mdb; 90 struct dsa_switch *ds = dp->ds; 91 u16 vid = standalone_work->vid; 92 int err; 93 94 switch (standalone_work->event) { 95 case DSA_UC_ADD: 96 err = dsa_port_standalone_host_fdb_add(dp, addr, vid); 97 if (err) { 98 dev_err(ds->dev, 99 "port %d failed to add %pM vid %d to fdb: %d\n", 100 dp->index, addr, vid, err); 101 break; 102 } 103 break; 104 105 case DSA_UC_DEL: 106 err = dsa_port_standalone_host_fdb_del(dp, addr, vid); 107 if (err) { 108 dev_err(ds->dev, 109 "port %d failed to delete %pM vid %d from fdb: %d\n", 110 dp->index, addr, vid, err); 111 } 112 113 break; 114 case DSA_MC_ADD: 115 ether_addr_copy(mdb.addr, addr); 116 mdb.vid = vid; 117 118 err = dsa_port_standalone_host_mdb_add(dp, &mdb); 119 if (err) { 120 dev_err(ds->dev, 121 "port %d failed to add %pM vid %d to mdb: %d\n", 122 dp->index, addr, vid, err); 123 break; 124 } 125 break; 126 case DSA_MC_DEL: 127 ether_addr_copy(mdb.addr, addr); 128 mdb.vid = vid; 129 130 err = dsa_port_standalone_host_mdb_del(dp, &mdb); 131 if (err) { 132 dev_err(ds->dev, 133 "port %d failed to delete %pM vid %d from mdb: %d\n", 134 dp->index, addr, vid, err); 135 } 136 137 break; 138 } 139 140 kfree(standalone_work); 141 } 142 143 static int dsa_user_schedule_standalone_work(struct net_device *dev, 144 enum dsa_standalone_event event, 145 const unsigned char *addr, 146 u16 vid) 147 { 148 struct dsa_standalone_event_work *standalone_work; 149 150 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC); 151 if (!standalone_work) 152 return -ENOMEM; 153 154 INIT_WORK(&standalone_work->work, dsa_user_standalone_event_work); 155 standalone_work->event = event; 156 standalone_work->dev = dev; 157 158 ether_addr_copy(standalone_work->addr, addr); 159 standalone_work->vid = vid; 160 161 dsa_schedule_work(&standalone_work->work); 162 163 return 0; 164 } 165 166 static int dsa_user_host_vlan_rx_filtering(void *arg, int vid) 167 { 168 struct dsa_host_vlan_rx_filtering_ctx *ctx = arg; 169 170 return dsa_user_schedule_standalone_work(ctx->dev, ctx->event, 171 ctx->addr, vid); 172 } 173 174 static int dsa_user_vlan_for_each(struct net_device *dev, 175 int (*cb)(void *arg, int vid), void *arg) 176 { 177 struct dsa_port *dp = dsa_user_to_port(dev); 178 struct dsa_vlan *v; 179 int err; 180 181 lockdep_assert_held(&dev->addr_list_lock); 182 183 err = cb(arg, 0); 184 if (err) 185 return err; 186 187 list_for_each_entry(v, &dp->user_vlans, list) { 188 err = cb(arg, v->vid); 189 if (err) 190 return err; 191 } 192 193 return 0; 194 } 195 196 static int dsa_user_sync_uc(struct net_device *dev, 197 const unsigned char *addr) 198 { 199 struct net_device *conduit = dsa_user_to_conduit(dev); 200 struct dsa_port *dp = dsa_user_to_port(dev); 201 struct dsa_host_vlan_rx_filtering_ctx ctx = { 202 .dev = dev, 203 .addr = addr, 204 .event = DSA_UC_ADD, 205 }; 206 207 dev_uc_add(conduit, addr); 208 209 if (!dsa_switch_supports_uc_filtering(dp->ds)) 210 return 0; 211 212 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering, 213 &ctx); 214 } 215 216 static int dsa_user_unsync_uc(struct net_device *dev, 217 const unsigned char *addr) 218 { 219 struct net_device *conduit = dsa_user_to_conduit(dev); 220 struct dsa_port *dp = dsa_user_to_port(dev); 221 struct dsa_host_vlan_rx_filtering_ctx ctx = { 222 .dev = dev, 223 .addr = addr, 224 .event = DSA_UC_DEL, 225 }; 226 227 dev_uc_del(conduit, addr); 228 229 if (!dsa_switch_supports_uc_filtering(dp->ds)) 230 return 0; 231 232 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering, 233 &ctx); 234 } 235 236 static int dsa_user_sync_mc(struct net_device *dev, 237 const unsigned char *addr) 238 { 239 struct net_device *conduit = dsa_user_to_conduit(dev); 240 struct dsa_port *dp = dsa_user_to_port(dev); 241 struct dsa_host_vlan_rx_filtering_ctx ctx = { 242 .dev = dev, 243 .addr = addr, 244 .event = DSA_MC_ADD, 245 }; 246 247 dev_mc_add(conduit, addr); 248 249 if (!dsa_switch_supports_mc_filtering(dp->ds)) 250 return 0; 251 252 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering, 253 &ctx); 254 } 255 256 static int dsa_user_unsync_mc(struct net_device *dev, 257 const unsigned char *addr) 258 { 259 struct net_device *conduit = dsa_user_to_conduit(dev); 260 struct dsa_port *dp = dsa_user_to_port(dev); 261 struct dsa_host_vlan_rx_filtering_ctx ctx = { 262 .dev = dev, 263 .addr = addr, 264 .event = DSA_MC_DEL, 265 }; 266 267 dev_mc_del(conduit, addr); 268 269 if (!dsa_switch_supports_mc_filtering(dp->ds)) 270 return 0; 271 272 return dsa_user_vlan_for_each(dev, dsa_user_host_vlan_rx_filtering, 273 &ctx); 274 } 275 276 void dsa_user_sync_ha(struct net_device *dev) 277 { 278 struct dsa_port *dp = dsa_user_to_port(dev); 279 struct dsa_switch *ds = dp->ds; 280 struct netdev_hw_addr *ha; 281 282 netif_addr_lock_bh(dev); 283 284 netdev_for_each_synced_mc_addr(ha, dev) 285 dsa_user_sync_mc(dev, ha->addr); 286 287 netdev_for_each_synced_uc_addr(ha, dev) 288 dsa_user_sync_uc(dev, ha->addr); 289 290 netif_addr_unlock_bh(dev); 291 292 if (dsa_switch_supports_uc_filtering(ds) || 293 dsa_switch_supports_mc_filtering(ds)) 294 dsa_flush_workqueue(); 295 } 296 297 void dsa_user_unsync_ha(struct net_device *dev) 298 { 299 struct dsa_port *dp = dsa_user_to_port(dev); 300 struct dsa_switch *ds = dp->ds; 301 struct netdev_hw_addr *ha; 302 303 netif_addr_lock_bh(dev); 304 305 netdev_for_each_synced_uc_addr(ha, dev) 306 dsa_user_unsync_uc(dev, ha->addr); 307 308 netdev_for_each_synced_mc_addr(ha, dev) 309 dsa_user_unsync_mc(dev, ha->addr); 310 311 netif_addr_unlock_bh(dev); 312 313 if (dsa_switch_supports_uc_filtering(ds) || 314 dsa_switch_supports_mc_filtering(ds)) 315 dsa_flush_workqueue(); 316 } 317 318 /* user mii_bus handling ***************************************************/ 319 static int dsa_user_phy_read(struct mii_bus *bus, int addr, int reg) 320 { 321 struct dsa_switch *ds = bus->priv; 322 323 if (ds->phys_mii_mask & (1 << addr)) 324 return ds->ops->phy_read(ds, addr, reg); 325 326 return 0xffff; 327 } 328 329 static int dsa_user_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 330 { 331 struct dsa_switch *ds = bus->priv; 332 333 if (ds->phys_mii_mask & (1 << addr)) 334 return ds->ops->phy_write(ds, addr, reg, val); 335 336 return 0; 337 } 338 339 void dsa_user_mii_bus_init(struct dsa_switch *ds) 340 { 341 ds->user_mii_bus->priv = (void *)ds; 342 ds->user_mii_bus->name = "dsa user smi"; 343 ds->user_mii_bus->read = dsa_user_phy_read; 344 ds->user_mii_bus->write = dsa_user_phy_write; 345 snprintf(ds->user_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 346 ds->dst->index, ds->index); 347 ds->user_mii_bus->parent = ds->dev; 348 ds->user_mii_bus->phy_mask = ~ds->phys_mii_mask; 349 } 350 351 352 /* user device handling ****************************************************/ 353 static int dsa_user_get_iflink(const struct net_device *dev) 354 { 355 return READ_ONCE(dsa_user_to_conduit(dev)->ifindex); 356 } 357 358 int dsa_user_host_uc_install(struct net_device *dev, const u8 *addr) 359 { 360 struct net_device *conduit = dsa_user_to_conduit(dev); 361 struct dsa_port *dp = dsa_user_to_port(dev); 362 struct dsa_switch *ds = dp->ds; 363 int err; 364 365 if (dsa_switch_supports_uc_filtering(ds)) { 366 err = dsa_port_standalone_host_fdb_add(dp, addr, 0); 367 if (err) 368 goto out; 369 } 370 371 if (!ether_addr_equal(addr, conduit->dev_addr)) { 372 err = dev_uc_add(conduit, addr); 373 if (err < 0) 374 goto del_host_addr; 375 } 376 377 return 0; 378 379 del_host_addr: 380 if (dsa_switch_supports_uc_filtering(ds)) 381 dsa_port_standalone_host_fdb_del(dp, addr, 0); 382 out: 383 return err; 384 } 385 386 void dsa_user_host_uc_uninstall(struct net_device *dev) 387 { 388 struct net_device *conduit = dsa_user_to_conduit(dev); 389 struct dsa_port *dp = dsa_user_to_port(dev); 390 struct dsa_switch *ds = dp->ds; 391 392 if (!ether_addr_equal(dev->dev_addr, conduit->dev_addr)) 393 dev_uc_del(conduit, dev->dev_addr); 394 395 if (dsa_switch_supports_uc_filtering(ds)) 396 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 397 } 398 399 static int dsa_user_open(struct net_device *dev) 400 { 401 struct net_device *conduit = dsa_user_to_conduit(dev); 402 struct dsa_port *dp = dsa_user_to_port(dev); 403 int err; 404 405 err = dev_open(conduit, NULL); 406 if (err < 0) { 407 netdev_err(dev, "failed to open conduit %s\n", conduit->name); 408 goto out; 409 } 410 411 err = dsa_user_host_uc_install(dev, dev->dev_addr); 412 if (err) 413 goto out; 414 415 err = dsa_port_enable_rt(dp, dev->phydev); 416 if (err) 417 goto out_del_host_uc; 418 419 return 0; 420 421 out_del_host_uc: 422 dsa_user_host_uc_uninstall(dev); 423 out: 424 return err; 425 } 426 427 static int dsa_user_close(struct net_device *dev) 428 { 429 struct dsa_port *dp = dsa_user_to_port(dev); 430 431 dsa_port_disable_rt(dp); 432 433 dsa_user_host_uc_uninstall(dev); 434 435 return 0; 436 } 437 438 static void dsa_user_manage_host_flood(struct net_device *dev) 439 { 440 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI); 441 struct dsa_port *dp = dsa_user_to_port(dev); 442 bool uc = dev->flags & IFF_PROMISC; 443 444 dsa_port_set_host_flood(dp, uc, mc); 445 } 446 447 static void dsa_user_change_rx_flags(struct net_device *dev, int change) 448 { 449 struct net_device *conduit = dsa_user_to_conduit(dev); 450 struct dsa_port *dp = dsa_user_to_port(dev); 451 struct dsa_switch *ds = dp->ds; 452 453 if (change & IFF_ALLMULTI) 454 dev_set_allmulti(conduit, 455 dev->flags & IFF_ALLMULTI ? 1 : -1); 456 if (change & IFF_PROMISC) 457 dev_set_promiscuity(conduit, 458 dev->flags & IFF_PROMISC ? 1 : -1); 459 460 if (dsa_switch_supports_uc_filtering(ds) && 461 dsa_switch_supports_mc_filtering(ds)) 462 dsa_user_manage_host_flood(dev); 463 } 464 465 static void dsa_user_set_rx_mode(struct net_device *dev) 466 { 467 __dev_mc_sync(dev, dsa_user_sync_mc, dsa_user_unsync_mc); 468 __dev_uc_sync(dev, dsa_user_sync_uc, dsa_user_unsync_uc); 469 } 470 471 static int dsa_user_set_mac_address(struct net_device *dev, void *a) 472 { 473 struct dsa_port *dp = dsa_user_to_port(dev); 474 struct dsa_switch *ds = dp->ds; 475 struct sockaddr *addr = a; 476 int err; 477 478 if (!is_valid_ether_addr(addr->sa_data)) 479 return -EADDRNOTAVAIL; 480 481 if (ds->ops->port_set_mac_address) { 482 err = ds->ops->port_set_mac_address(ds, dp->index, 483 addr->sa_data); 484 if (err) 485 return err; 486 } 487 488 /* If the port is down, the address isn't synced yet to hardware or 489 * to the DSA conduit, so there is nothing to change. 490 */ 491 if (!(dev->flags & IFF_UP)) 492 goto out_change_dev_addr; 493 494 err = dsa_user_host_uc_install(dev, addr->sa_data); 495 if (err) 496 return err; 497 498 dsa_user_host_uc_uninstall(dev); 499 500 out_change_dev_addr: 501 eth_hw_addr_set(dev, addr->sa_data); 502 503 return 0; 504 } 505 506 struct dsa_user_dump_ctx { 507 struct net_device *dev; 508 struct sk_buff *skb; 509 struct netlink_callback *cb; 510 int idx; 511 }; 512 513 static int 514 dsa_user_port_fdb_do_dump(const unsigned char *addr, u16 vid, 515 bool is_static, void *data) 516 { 517 struct dsa_user_dump_ctx *dump = data; 518 u32 portid = NETLINK_CB(dump->cb->skb).portid; 519 u32 seq = dump->cb->nlh->nlmsg_seq; 520 struct nlmsghdr *nlh; 521 struct ndmsg *ndm; 522 523 if (dump->idx < dump->cb->args[2]) 524 goto skip; 525 526 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 527 sizeof(*ndm), NLM_F_MULTI); 528 if (!nlh) 529 return -EMSGSIZE; 530 531 ndm = nlmsg_data(nlh); 532 ndm->ndm_family = AF_BRIDGE; 533 ndm->ndm_pad1 = 0; 534 ndm->ndm_pad2 = 0; 535 ndm->ndm_flags = NTF_SELF; 536 ndm->ndm_type = 0; 537 ndm->ndm_ifindex = dump->dev->ifindex; 538 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 539 540 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 541 goto nla_put_failure; 542 543 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 544 goto nla_put_failure; 545 546 nlmsg_end(dump->skb, nlh); 547 548 skip: 549 dump->idx++; 550 return 0; 551 552 nla_put_failure: 553 nlmsg_cancel(dump->skb, nlh); 554 return -EMSGSIZE; 555 } 556 557 static int 558 dsa_user_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 559 struct net_device *dev, struct net_device *filter_dev, 560 int *idx) 561 { 562 struct dsa_port *dp = dsa_user_to_port(dev); 563 struct dsa_user_dump_ctx dump = { 564 .dev = dev, 565 .skb = skb, 566 .cb = cb, 567 .idx = *idx, 568 }; 569 int err; 570 571 err = dsa_port_fdb_dump(dp, dsa_user_port_fdb_do_dump, &dump); 572 *idx = dump.idx; 573 574 return err; 575 } 576 577 static int dsa_user_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 578 { 579 struct dsa_user_priv *p = netdev_priv(dev); 580 struct dsa_switch *ds = p->dp->ds; 581 int port = p->dp->index; 582 583 /* Pass through to switch driver if it supports timestamping */ 584 switch (cmd) { 585 case SIOCGHWTSTAMP: 586 if (ds->ops->port_hwtstamp_get) 587 return ds->ops->port_hwtstamp_get(ds, port, ifr); 588 break; 589 case SIOCSHWTSTAMP: 590 if (ds->ops->port_hwtstamp_set) 591 return ds->ops->port_hwtstamp_set(ds, port, ifr); 592 break; 593 } 594 595 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 596 } 597 598 static int dsa_user_port_attr_set(struct net_device *dev, const void *ctx, 599 const struct switchdev_attr *attr, 600 struct netlink_ext_ack *extack) 601 { 602 struct dsa_port *dp = dsa_user_to_port(dev); 603 int ret; 604 605 if (ctx && ctx != dp) 606 return 0; 607 608 switch (attr->id) { 609 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 610 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 611 return -EOPNOTSUPP; 612 613 ret = dsa_port_set_state(dp, attr->u.stp_state, true); 614 break; 615 case SWITCHDEV_ATTR_ID_PORT_MST_STATE: 616 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 617 return -EOPNOTSUPP; 618 619 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack); 620 break; 621 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 622 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 623 return -EOPNOTSUPP; 624 625 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 626 extack); 627 break; 628 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 629 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 630 return -EOPNOTSUPP; 631 632 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 633 break; 634 case SWITCHDEV_ATTR_ID_BRIDGE_MST: 635 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 636 return -EOPNOTSUPP; 637 638 ret = dsa_port_mst_enable(dp, attr->u.mst, extack); 639 break; 640 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 641 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 642 return -EOPNOTSUPP; 643 644 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 645 extack); 646 break; 647 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 648 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 649 return -EOPNOTSUPP; 650 651 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 652 break; 653 case SWITCHDEV_ATTR_ID_VLAN_MSTI: 654 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 655 return -EOPNOTSUPP; 656 657 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti); 658 break; 659 default: 660 ret = -EOPNOTSUPP; 661 break; 662 } 663 664 return ret; 665 } 666 667 /* Must be called under rcu_read_lock() */ 668 static int 669 dsa_user_vlan_check_for_8021q_uppers(struct net_device *user, 670 const struct switchdev_obj_port_vlan *vlan) 671 { 672 struct net_device *upper_dev; 673 struct list_head *iter; 674 675 netdev_for_each_upper_dev_rcu(user, upper_dev, iter) { 676 u16 vid; 677 678 if (!is_vlan_dev(upper_dev)) 679 continue; 680 681 vid = vlan_dev_vlan_id(upper_dev); 682 if (vid == vlan->vid) 683 return -EBUSY; 684 } 685 686 return 0; 687 } 688 689 static int dsa_user_vlan_add(struct net_device *dev, 690 const struct switchdev_obj *obj, 691 struct netlink_ext_ack *extack) 692 { 693 struct dsa_port *dp = dsa_user_to_port(dev); 694 struct switchdev_obj_port_vlan *vlan; 695 int err; 696 697 if (dsa_port_skip_vlan_configuration(dp)) { 698 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 699 return 0; 700 } 701 702 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 703 704 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 705 * the same VID. 706 */ 707 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { 708 rcu_read_lock(); 709 err = dsa_user_vlan_check_for_8021q_uppers(dev, vlan); 710 rcu_read_unlock(); 711 if (err) { 712 NL_SET_ERR_MSG_MOD(extack, 713 "Port already has a VLAN upper with this VID"); 714 return err; 715 } 716 } 717 718 return dsa_port_vlan_add(dp, vlan, extack); 719 } 720 721 /* Offload a VLAN installed on the bridge or on a foreign interface by 722 * installing it as a VLAN towards the CPU port. 723 */ 724 static int dsa_user_host_vlan_add(struct net_device *dev, 725 const struct switchdev_obj *obj, 726 struct netlink_ext_ack *extack) 727 { 728 struct dsa_port *dp = dsa_user_to_port(dev); 729 struct switchdev_obj_port_vlan vlan; 730 731 /* Do nothing if this is a software bridge */ 732 if (!dp->bridge) 733 return -EOPNOTSUPP; 734 735 if (dsa_port_skip_vlan_configuration(dp)) { 736 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 737 return 0; 738 } 739 740 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 741 742 /* Even though drivers often handle CPU membership in special ways, 743 * it doesn't make sense to program a PVID, so clear this flag. 744 */ 745 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 746 747 return dsa_port_host_vlan_add(dp, &vlan, extack); 748 } 749 750 static int dsa_user_port_obj_add(struct net_device *dev, const void *ctx, 751 const struct switchdev_obj *obj, 752 struct netlink_ext_ack *extack) 753 { 754 struct dsa_port *dp = dsa_user_to_port(dev); 755 int err; 756 757 if (ctx && ctx != dp) 758 return 0; 759 760 switch (obj->id) { 761 case SWITCHDEV_OBJ_ID_PORT_MDB: 762 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 763 return -EOPNOTSUPP; 764 765 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 766 break; 767 case SWITCHDEV_OBJ_ID_HOST_MDB: 768 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 769 return -EOPNOTSUPP; 770 771 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 772 break; 773 case SWITCHDEV_OBJ_ID_PORT_VLAN: 774 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 775 err = dsa_user_vlan_add(dev, obj, extack); 776 else 777 err = dsa_user_host_vlan_add(dev, obj, extack); 778 break; 779 case SWITCHDEV_OBJ_ID_MRP: 780 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 781 return -EOPNOTSUPP; 782 783 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 784 break; 785 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 786 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 787 return -EOPNOTSUPP; 788 789 err = dsa_port_mrp_add_ring_role(dp, 790 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 791 break; 792 default: 793 err = -EOPNOTSUPP; 794 break; 795 } 796 797 return err; 798 } 799 800 static int dsa_user_vlan_del(struct net_device *dev, 801 const struct switchdev_obj *obj) 802 { 803 struct dsa_port *dp = dsa_user_to_port(dev); 804 struct switchdev_obj_port_vlan *vlan; 805 806 if (dsa_port_skip_vlan_configuration(dp)) 807 return 0; 808 809 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 810 811 return dsa_port_vlan_del(dp, vlan); 812 } 813 814 static int dsa_user_host_vlan_del(struct net_device *dev, 815 const struct switchdev_obj *obj) 816 { 817 struct dsa_port *dp = dsa_user_to_port(dev); 818 struct switchdev_obj_port_vlan *vlan; 819 820 /* Do nothing if this is a software bridge */ 821 if (!dp->bridge) 822 return -EOPNOTSUPP; 823 824 if (dsa_port_skip_vlan_configuration(dp)) 825 return 0; 826 827 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 828 829 return dsa_port_host_vlan_del(dp, vlan); 830 } 831 832 static int dsa_user_port_obj_del(struct net_device *dev, const void *ctx, 833 const struct switchdev_obj *obj) 834 { 835 struct dsa_port *dp = dsa_user_to_port(dev); 836 int err; 837 838 if (ctx && ctx != dp) 839 return 0; 840 841 switch (obj->id) { 842 case SWITCHDEV_OBJ_ID_PORT_MDB: 843 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 844 return -EOPNOTSUPP; 845 846 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 847 break; 848 case SWITCHDEV_OBJ_ID_HOST_MDB: 849 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 850 return -EOPNOTSUPP; 851 852 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 853 break; 854 case SWITCHDEV_OBJ_ID_PORT_VLAN: 855 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 856 err = dsa_user_vlan_del(dev, obj); 857 else 858 err = dsa_user_host_vlan_del(dev, obj); 859 break; 860 case SWITCHDEV_OBJ_ID_MRP: 861 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 862 return -EOPNOTSUPP; 863 864 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 865 break; 866 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 867 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 868 return -EOPNOTSUPP; 869 870 err = dsa_port_mrp_del_ring_role(dp, 871 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 872 break; 873 default: 874 err = -EOPNOTSUPP; 875 break; 876 } 877 878 return err; 879 } 880 881 static netdev_tx_t dsa_user_netpoll_send_skb(struct net_device *dev, 882 struct sk_buff *skb) 883 { 884 #ifdef CONFIG_NET_POLL_CONTROLLER 885 struct dsa_user_priv *p = netdev_priv(dev); 886 887 return netpoll_send_skb(p->netpoll, skb); 888 #else 889 BUG(); 890 return NETDEV_TX_OK; 891 #endif 892 } 893 894 static void dsa_skb_tx_timestamp(struct dsa_user_priv *p, 895 struct sk_buff *skb) 896 { 897 struct dsa_switch *ds = p->dp->ds; 898 899 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 900 return; 901 902 if (!ds->ops->port_txtstamp) 903 return; 904 905 ds->ops->port_txtstamp(ds, p->dp->index, skb); 906 } 907 908 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 909 { 910 /* SKB for netpoll still need to be mangled with the protocol-specific 911 * tag to be successfully transmitted 912 */ 913 if (unlikely(netpoll_tx_running(dev))) 914 return dsa_user_netpoll_send_skb(dev, skb); 915 916 /* Queue the SKB for transmission on the parent interface, but 917 * do not modify its EtherType 918 */ 919 skb->dev = dsa_user_to_conduit(dev); 920 dev_queue_xmit(skb); 921 922 return NETDEV_TX_OK; 923 } 924 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 925 926 static netdev_tx_t dsa_user_xmit(struct sk_buff *skb, struct net_device *dev) 927 { 928 struct dsa_user_priv *p = netdev_priv(dev); 929 struct sk_buff *nskb; 930 931 dev_sw_netstats_tx_add(dev, 1, skb->len); 932 933 memset(skb->cb, 0, sizeof(skb->cb)); 934 935 /* Handle tx timestamp if any */ 936 dsa_skb_tx_timestamp(p, skb); 937 938 if (skb_ensure_writable_head_tail(skb, dev)) { 939 dev_kfree_skb_any(skb); 940 return NETDEV_TX_OK; 941 } 942 943 /* needed_tailroom should still be 'warm' in the cache line from 944 * skb_ensure_writable_head_tail(), which has also ensured that 945 * padding is safe. 946 */ 947 if (dev->needed_tailroom) 948 eth_skb_pad(skb); 949 950 /* Transmit function may have to reallocate the original SKB, 951 * in which case it must have freed it. Only free it here on error. 952 */ 953 nskb = p->xmit(skb, dev); 954 if (!nskb) { 955 kfree_skb(skb); 956 return NETDEV_TX_OK; 957 } 958 959 return dsa_enqueue_skb(nskb, dev); 960 } 961 962 /* ethtool operations *******************************************************/ 963 964 static void dsa_user_get_drvinfo(struct net_device *dev, 965 struct ethtool_drvinfo *drvinfo) 966 { 967 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 968 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 969 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 970 } 971 972 static int dsa_user_get_regs_len(struct net_device *dev) 973 { 974 struct dsa_port *dp = dsa_user_to_port(dev); 975 struct dsa_switch *ds = dp->ds; 976 977 if (ds->ops->get_regs_len) 978 return ds->ops->get_regs_len(ds, dp->index); 979 980 return -EOPNOTSUPP; 981 } 982 983 static void 984 dsa_user_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 985 { 986 struct dsa_port *dp = dsa_user_to_port(dev); 987 struct dsa_switch *ds = dp->ds; 988 989 if (ds->ops->get_regs) 990 ds->ops->get_regs(ds, dp->index, regs, _p); 991 } 992 993 static int dsa_user_nway_reset(struct net_device *dev) 994 { 995 struct dsa_port *dp = dsa_user_to_port(dev); 996 997 return phylink_ethtool_nway_reset(dp->pl); 998 } 999 1000 static int dsa_user_get_eeprom_len(struct net_device *dev) 1001 { 1002 struct dsa_port *dp = dsa_user_to_port(dev); 1003 struct dsa_switch *ds = dp->ds; 1004 1005 if (ds->cd && ds->cd->eeprom_len) 1006 return ds->cd->eeprom_len; 1007 1008 if (ds->ops->get_eeprom_len) 1009 return ds->ops->get_eeprom_len(ds); 1010 1011 return 0; 1012 } 1013 1014 static int dsa_user_get_eeprom(struct net_device *dev, 1015 struct ethtool_eeprom *eeprom, u8 *data) 1016 { 1017 struct dsa_port *dp = dsa_user_to_port(dev); 1018 struct dsa_switch *ds = dp->ds; 1019 1020 if (ds->ops->get_eeprom) 1021 return ds->ops->get_eeprom(ds, eeprom, data); 1022 1023 return -EOPNOTSUPP; 1024 } 1025 1026 static int dsa_user_set_eeprom(struct net_device *dev, 1027 struct ethtool_eeprom *eeprom, u8 *data) 1028 { 1029 struct dsa_port *dp = dsa_user_to_port(dev); 1030 struct dsa_switch *ds = dp->ds; 1031 1032 if (ds->ops->set_eeprom) 1033 return ds->ops->set_eeprom(ds, eeprom, data); 1034 1035 return -EOPNOTSUPP; 1036 } 1037 1038 static void dsa_user_get_strings(struct net_device *dev, 1039 uint32_t stringset, uint8_t *data) 1040 { 1041 struct dsa_port *dp = dsa_user_to_port(dev); 1042 struct dsa_switch *ds = dp->ds; 1043 1044 if (stringset == ETH_SS_STATS) { 1045 int len = ETH_GSTRING_LEN; 1046 1047 strscpy_pad(data, "tx_packets", len); 1048 strscpy_pad(data + len, "tx_bytes", len); 1049 strscpy_pad(data + 2 * len, "rx_packets", len); 1050 strscpy_pad(data + 3 * len, "rx_bytes", len); 1051 if (ds->ops->get_strings) 1052 ds->ops->get_strings(ds, dp->index, stringset, 1053 data + 4 * len); 1054 } else if (stringset == ETH_SS_TEST) { 1055 net_selftest_get_strings(data); 1056 } 1057 1058 } 1059 1060 static void dsa_user_get_ethtool_stats(struct net_device *dev, 1061 struct ethtool_stats *stats, 1062 uint64_t *data) 1063 { 1064 struct dsa_port *dp = dsa_user_to_port(dev); 1065 struct dsa_switch *ds = dp->ds; 1066 struct pcpu_sw_netstats *s; 1067 unsigned int start; 1068 int i; 1069 1070 for_each_possible_cpu(i) { 1071 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 1072 1073 s = per_cpu_ptr(dev->tstats, i); 1074 do { 1075 start = u64_stats_fetch_begin(&s->syncp); 1076 tx_packets = u64_stats_read(&s->tx_packets); 1077 tx_bytes = u64_stats_read(&s->tx_bytes); 1078 rx_packets = u64_stats_read(&s->rx_packets); 1079 rx_bytes = u64_stats_read(&s->rx_bytes); 1080 } while (u64_stats_fetch_retry(&s->syncp, start)); 1081 data[0] += tx_packets; 1082 data[1] += tx_bytes; 1083 data[2] += rx_packets; 1084 data[3] += rx_bytes; 1085 } 1086 if (ds->ops->get_ethtool_stats) 1087 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 1088 } 1089 1090 static int dsa_user_get_sset_count(struct net_device *dev, int sset) 1091 { 1092 struct dsa_port *dp = dsa_user_to_port(dev); 1093 struct dsa_switch *ds = dp->ds; 1094 1095 if (sset == ETH_SS_STATS) { 1096 int count = 0; 1097 1098 if (ds->ops->get_sset_count) { 1099 count = ds->ops->get_sset_count(ds, dp->index, sset); 1100 if (count < 0) 1101 return count; 1102 } 1103 1104 return count + 4; 1105 } else if (sset == ETH_SS_TEST) { 1106 return net_selftest_get_count(); 1107 } 1108 1109 return -EOPNOTSUPP; 1110 } 1111 1112 static void dsa_user_get_eth_phy_stats(struct net_device *dev, 1113 struct ethtool_eth_phy_stats *phy_stats) 1114 { 1115 struct dsa_port *dp = dsa_user_to_port(dev); 1116 struct dsa_switch *ds = dp->ds; 1117 1118 if (ds->ops->get_eth_phy_stats) 1119 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats); 1120 } 1121 1122 static void dsa_user_get_eth_mac_stats(struct net_device *dev, 1123 struct ethtool_eth_mac_stats *mac_stats) 1124 { 1125 struct dsa_port *dp = dsa_user_to_port(dev); 1126 struct dsa_switch *ds = dp->ds; 1127 1128 if (ds->ops->get_eth_mac_stats) 1129 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats); 1130 } 1131 1132 static void 1133 dsa_user_get_eth_ctrl_stats(struct net_device *dev, 1134 struct ethtool_eth_ctrl_stats *ctrl_stats) 1135 { 1136 struct dsa_port *dp = dsa_user_to_port(dev); 1137 struct dsa_switch *ds = dp->ds; 1138 1139 if (ds->ops->get_eth_ctrl_stats) 1140 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats); 1141 } 1142 1143 static void 1144 dsa_user_get_rmon_stats(struct net_device *dev, 1145 struct ethtool_rmon_stats *rmon_stats, 1146 const struct ethtool_rmon_hist_range **ranges) 1147 { 1148 struct dsa_port *dp = dsa_user_to_port(dev); 1149 struct dsa_switch *ds = dp->ds; 1150 1151 if (ds->ops->get_rmon_stats) 1152 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges); 1153 } 1154 1155 static void dsa_user_net_selftest(struct net_device *ndev, 1156 struct ethtool_test *etest, u64 *buf) 1157 { 1158 struct dsa_port *dp = dsa_user_to_port(ndev); 1159 struct dsa_switch *ds = dp->ds; 1160 1161 if (ds->ops->self_test) { 1162 ds->ops->self_test(ds, dp->index, etest, buf); 1163 return; 1164 } 1165 1166 net_selftest(ndev, etest, buf); 1167 } 1168 1169 static int dsa_user_get_mm(struct net_device *dev, 1170 struct ethtool_mm_state *state) 1171 { 1172 struct dsa_port *dp = dsa_user_to_port(dev); 1173 struct dsa_switch *ds = dp->ds; 1174 1175 if (!ds->ops->get_mm) 1176 return -EOPNOTSUPP; 1177 1178 return ds->ops->get_mm(ds, dp->index, state); 1179 } 1180 1181 static int dsa_user_set_mm(struct net_device *dev, struct ethtool_mm_cfg *cfg, 1182 struct netlink_ext_ack *extack) 1183 { 1184 struct dsa_port *dp = dsa_user_to_port(dev); 1185 struct dsa_switch *ds = dp->ds; 1186 1187 if (!ds->ops->set_mm) 1188 return -EOPNOTSUPP; 1189 1190 return ds->ops->set_mm(ds, dp->index, cfg, extack); 1191 } 1192 1193 static void dsa_user_get_mm_stats(struct net_device *dev, 1194 struct ethtool_mm_stats *stats) 1195 { 1196 struct dsa_port *dp = dsa_user_to_port(dev); 1197 struct dsa_switch *ds = dp->ds; 1198 1199 if (ds->ops->get_mm_stats) 1200 ds->ops->get_mm_stats(ds, dp->index, stats); 1201 } 1202 1203 static void dsa_user_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1204 { 1205 struct dsa_port *dp = dsa_user_to_port(dev); 1206 struct dsa_switch *ds = dp->ds; 1207 1208 phylink_ethtool_get_wol(dp->pl, w); 1209 1210 if (ds->ops->get_wol) 1211 ds->ops->get_wol(ds, dp->index, w); 1212 } 1213 1214 static int dsa_user_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1215 { 1216 struct dsa_port *dp = dsa_user_to_port(dev); 1217 struct dsa_switch *ds = dp->ds; 1218 int ret = -EOPNOTSUPP; 1219 1220 phylink_ethtool_set_wol(dp->pl, w); 1221 1222 if (ds->ops->set_wol) 1223 ret = ds->ops->set_wol(ds, dp->index, w); 1224 1225 return ret; 1226 } 1227 1228 static int dsa_user_set_eee(struct net_device *dev, struct ethtool_keee *e) 1229 { 1230 struct dsa_port *dp = dsa_user_to_port(dev); 1231 struct dsa_switch *ds = dp->ds; 1232 int ret; 1233 1234 /* Port's PHY and MAC both need to be EEE capable */ 1235 if (!dev->phydev || !dp->pl) 1236 return -ENODEV; 1237 1238 if (!ds->ops->set_mac_eee) 1239 return -EOPNOTSUPP; 1240 1241 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1242 if (ret) 1243 return ret; 1244 1245 return phylink_ethtool_set_eee(dp->pl, e); 1246 } 1247 1248 static int dsa_user_get_eee(struct net_device *dev, struct ethtool_keee *e) 1249 { 1250 struct dsa_port *dp = dsa_user_to_port(dev); 1251 struct dsa_switch *ds = dp->ds; 1252 int ret; 1253 1254 /* Port's PHY and MAC both need to be EEE capable */ 1255 if (!dev->phydev || !dp->pl) 1256 return -ENODEV; 1257 1258 if (!ds->ops->get_mac_eee) 1259 return -EOPNOTSUPP; 1260 1261 ret = ds->ops->get_mac_eee(ds, dp->index, e); 1262 if (ret) 1263 return ret; 1264 1265 return phylink_ethtool_get_eee(dp->pl, e); 1266 } 1267 1268 static int dsa_user_get_link_ksettings(struct net_device *dev, 1269 struct ethtool_link_ksettings *cmd) 1270 { 1271 struct dsa_port *dp = dsa_user_to_port(dev); 1272 1273 return phylink_ethtool_ksettings_get(dp->pl, cmd); 1274 } 1275 1276 static int dsa_user_set_link_ksettings(struct net_device *dev, 1277 const struct ethtool_link_ksettings *cmd) 1278 { 1279 struct dsa_port *dp = dsa_user_to_port(dev); 1280 1281 return phylink_ethtool_ksettings_set(dp->pl, cmd); 1282 } 1283 1284 static void dsa_user_get_pause_stats(struct net_device *dev, 1285 struct ethtool_pause_stats *pause_stats) 1286 { 1287 struct dsa_port *dp = dsa_user_to_port(dev); 1288 struct dsa_switch *ds = dp->ds; 1289 1290 if (ds->ops->get_pause_stats) 1291 ds->ops->get_pause_stats(ds, dp->index, pause_stats); 1292 } 1293 1294 static void dsa_user_get_pauseparam(struct net_device *dev, 1295 struct ethtool_pauseparam *pause) 1296 { 1297 struct dsa_port *dp = dsa_user_to_port(dev); 1298 1299 phylink_ethtool_get_pauseparam(dp->pl, pause); 1300 } 1301 1302 static int dsa_user_set_pauseparam(struct net_device *dev, 1303 struct ethtool_pauseparam *pause) 1304 { 1305 struct dsa_port *dp = dsa_user_to_port(dev); 1306 1307 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1308 } 1309 1310 #ifdef CONFIG_NET_POLL_CONTROLLER 1311 static int dsa_user_netpoll_setup(struct net_device *dev) 1312 { 1313 struct net_device *conduit = dsa_user_to_conduit(dev); 1314 struct dsa_user_priv *p = netdev_priv(dev); 1315 struct netpoll *netpoll; 1316 int err = 0; 1317 1318 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1319 if (!netpoll) 1320 return -ENOMEM; 1321 1322 err = __netpoll_setup(netpoll, conduit); 1323 if (err) { 1324 kfree(netpoll); 1325 goto out; 1326 } 1327 1328 p->netpoll = netpoll; 1329 out: 1330 return err; 1331 } 1332 1333 static void dsa_user_netpoll_cleanup(struct net_device *dev) 1334 { 1335 struct dsa_user_priv *p = netdev_priv(dev); 1336 struct netpoll *netpoll = p->netpoll; 1337 1338 if (!netpoll) 1339 return; 1340 1341 p->netpoll = NULL; 1342 1343 __netpoll_free(netpoll); 1344 } 1345 1346 static void dsa_user_poll_controller(struct net_device *dev) 1347 { 1348 } 1349 #endif 1350 1351 static struct dsa_mall_tc_entry * 1352 dsa_user_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1353 { 1354 struct dsa_user_priv *p = netdev_priv(dev); 1355 struct dsa_mall_tc_entry *mall_tc_entry; 1356 1357 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1358 if (mall_tc_entry->cookie == cookie) 1359 return mall_tc_entry; 1360 1361 return NULL; 1362 } 1363 1364 static int 1365 dsa_user_add_cls_matchall_mirred(struct net_device *dev, 1366 struct tc_cls_matchall_offload *cls, 1367 bool ingress) 1368 { 1369 struct netlink_ext_ack *extack = cls->common.extack; 1370 struct dsa_port *dp = dsa_user_to_port(dev); 1371 struct dsa_user_priv *p = netdev_priv(dev); 1372 struct dsa_mall_mirror_tc_entry *mirror; 1373 struct dsa_mall_tc_entry *mall_tc_entry; 1374 struct dsa_switch *ds = dp->ds; 1375 struct flow_action_entry *act; 1376 struct dsa_port *to_dp; 1377 int err; 1378 1379 if (cls->common.protocol != htons(ETH_P_ALL)) 1380 return -EOPNOTSUPP; 1381 1382 if (!ds->ops->port_mirror_add) 1383 return -EOPNOTSUPP; 1384 1385 if (!flow_action_basic_hw_stats_check(&cls->rule->action, extack)) 1386 return -EOPNOTSUPP; 1387 1388 act = &cls->rule->action.entries[0]; 1389 1390 if (!act->dev) 1391 return -EINVAL; 1392 1393 if (!dsa_user_dev_check(act->dev)) 1394 return -EOPNOTSUPP; 1395 1396 to_dp = dsa_user_to_port(act->dev); 1397 1398 if (dp->ds != to_dp->ds) { 1399 NL_SET_ERR_MSG_MOD(extack, 1400 "Cross-chip mirroring not implemented"); 1401 return -EOPNOTSUPP; 1402 } 1403 1404 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1405 if (!mall_tc_entry) 1406 return -ENOMEM; 1407 1408 mall_tc_entry->cookie = cls->cookie; 1409 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1410 mirror = &mall_tc_entry->mirror; 1411 mirror->to_local_port = to_dp->index; 1412 mirror->ingress = ingress; 1413 1414 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1415 if (err) { 1416 kfree(mall_tc_entry); 1417 return err; 1418 } 1419 1420 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1421 1422 return err; 1423 } 1424 1425 static int 1426 dsa_user_add_cls_matchall_police(struct net_device *dev, 1427 struct tc_cls_matchall_offload *cls, 1428 bool ingress) 1429 { 1430 struct netlink_ext_ack *extack = cls->common.extack; 1431 struct dsa_port *dp = dsa_user_to_port(dev); 1432 struct dsa_user_priv *p = netdev_priv(dev); 1433 struct dsa_mall_policer_tc_entry *policer; 1434 struct dsa_mall_tc_entry *mall_tc_entry; 1435 struct dsa_switch *ds = dp->ds; 1436 struct flow_action_entry *act; 1437 int err; 1438 1439 if (!ds->ops->port_policer_add) { 1440 NL_SET_ERR_MSG_MOD(extack, 1441 "Policing offload not implemented"); 1442 return -EOPNOTSUPP; 1443 } 1444 1445 if (!ingress) { 1446 NL_SET_ERR_MSG_MOD(extack, 1447 "Only supported on ingress qdisc"); 1448 return -EOPNOTSUPP; 1449 } 1450 1451 if (!flow_action_basic_hw_stats_check(&cls->rule->action, extack)) 1452 return -EOPNOTSUPP; 1453 1454 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1455 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1456 NL_SET_ERR_MSG_MOD(extack, 1457 "Only one port policer allowed"); 1458 return -EEXIST; 1459 } 1460 } 1461 1462 act = &cls->rule->action.entries[0]; 1463 1464 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1465 if (!mall_tc_entry) 1466 return -ENOMEM; 1467 1468 mall_tc_entry->cookie = cls->cookie; 1469 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1470 policer = &mall_tc_entry->policer; 1471 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1472 policer->burst = act->police.burst; 1473 1474 err = ds->ops->port_policer_add(ds, dp->index, policer); 1475 if (err) { 1476 kfree(mall_tc_entry); 1477 return err; 1478 } 1479 1480 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1481 1482 return err; 1483 } 1484 1485 static int dsa_user_add_cls_matchall(struct net_device *dev, 1486 struct tc_cls_matchall_offload *cls, 1487 bool ingress) 1488 { 1489 const struct flow_action *action = &cls->rule->action; 1490 1491 if (!flow_offload_has_one_action(action)) 1492 return -EOPNOTSUPP; 1493 1494 switch (action->entries[0].id) { 1495 case FLOW_ACTION_MIRRED: 1496 return dsa_user_add_cls_matchall_mirred(dev, cls, ingress); 1497 case FLOW_ACTION_POLICE: 1498 return dsa_user_add_cls_matchall_police(dev, cls, ingress); 1499 default: 1500 break; 1501 } 1502 1503 return -EOPNOTSUPP; 1504 } 1505 1506 static void dsa_user_del_cls_matchall(struct net_device *dev, 1507 struct tc_cls_matchall_offload *cls) 1508 { 1509 struct dsa_port *dp = dsa_user_to_port(dev); 1510 struct dsa_mall_tc_entry *mall_tc_entry; 1511 struct dsa_switch *ds = dp->ds; 1512 1513 mall_tc_entry = dsa_user_mall_tc_entry_find(dev, cls->cookie); 1514 if (!mall_tc_entry) 1515 return; 1516 1517 list_del(&mall_tc_entry->list); 1518 1519 switch (mall_tc_entry->type) { 1520 case DSA_PORT_MALL_MIRROR: 1521 if (ds->ops->port_mirror_del) 1522 ds->ops->port_mirror_del(ds, dp->index, 1523 &mall_tc_entry->mirror); 1524 break; 1525 case DSA_PORT_MALL_POLICER: 1526 if (ds->ops->port_policer_del) 1527 ds->ops->port_policer_del(ds, dp->index); 1528 break; 1529 default: 1530 WARN_ON(1); 1531 } 1532 1533 kfree(mall_tc_entry); 1534 } 1535 1536 static int dsa_user_setup_tc_cls_matchall(struct net_device *dev, 1537 struct tc_cls_matchall_offload *cls, 1538 bool ingress) 1539 { 1540 if (cls->common.chain_index) 1541 return -EOPNOTSUPP; 1542 1543 switch (cls->command) { 1544 case TC_CLSMATCHALL_REPLACE: 1545 return dsa_user_add_cls_matchall(dev, cls, ingress); 1546 case TC_CLSMATCHALL_DESTROY: 1547 dsa_user_del_cls_matchall(dev, cls); 1548 return 0; 1549 default: 1550 return -EOPNOTSUPP; 1551 } 1552 } 1553 1554 static int dsa_user_add_cls_flower(struct net_device *dev, 1555 struct flow_cls_offload *cls, 1556 bool ingress) 1557 { 1558 struct dsa_port *dp = dsa_user_to_port(dev); 1559 struct dsa_switch *ds = dp->ds; 1560 int port = dp->index; 1561 1562 if (!ds->ops->cls_flower_add) 1563 return -EOPNOTSUPP; 1564 1565 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1566 } 1567 1568 static int dsa_user_del_cls_flower(struct net_device *dev, 1569 struct flow_cls_offload *cls, 1570 bool ingress) 1571 { 1572 struct dsa_port *dp = dsa_user_to_port(dev); 1573 struct dsa_switch *ds = dp->ds; 1574 int port = dp->index; 1575 1576 if (!ds->ops->cls_flower_del) 1577 return -EOPNOTSUPP; 1578 1579 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1580 } 1581 1582 static int dsa_user_stats_cls_flower(struct net_device *dev, 1583 struct flow_cls_offload *cls, 1584 bool ingress) 1585 { 1586 struct dsa_port *dp = dsa_user_to_port(dev); 1587 struct dsa_switch *ds = dp->ds; 1588 int port = dp->index; 1589 1590 if (!ds->ops->cls_flower_stats) 1591 return -EOPNOTSUPP; 1592 1593 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1594 } 1595 1596 static int dsa_user_setup_tc_cls_flower(struct net_device *dev, 1597 struct flow_cls_offload *cls, 1598 bool ingress) 1599 { 1600 switch (cls->command) { 1601 case FLOW_CLS_REPLACE: 1602 return dsa_user_add_cls_flower(dev, cls, ingress); 1603 case FLOW_CLS_DESTROY: 1604 return dsa_user_del_cls_flower(dev, cls, ingress); 1605 case FLOW_CLS_STATS: 1606 return dsa_user_stats_cls_flower(dev, cls, ingress); 1607 default: 1608 return -EOPNOTSUPP; 1609 } 1610 } 1611 1612 static int dsa_user_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1613 void *cb_priv, bool ingress) 1614 { 1615 struct net_device *dev = cb_priv; 1616 1617 if (!tc_can_offload(dev)) 1618 return -EOPNOTSUPP; 1619 1620 switch (type) { 1621 case TC_SETUP_CLSMATCHALL: 1622 return dsa_user_setup_tc_cls_matchall(dev, type_data, ingress); 1623 case TC_SETUP_CLSFLOWER: 1624 return dsa_user_setup_tc_cls_flower(dev, type_data, ingress); 1625 default: 1626 return -EOPNOTSUPP; 1627 } 1628 } 1629 1630 static int dsa_user_setup_tc_block_cb_ig(enum tc_setup_type type, 1631 void *type_data, void *cb_priv) 1632 { 1633 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, true); 1634 } 1635 1636 static int dsa_user_setup_tc_block_cb_eg(enum tc_setup_type type, 1637 void *type_data, void *cb_priv) 1638 { 1639 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, false); 1640 } 1641 1642 static LIST_HEAD(dsa_user_block_cb_list); 1643 1644 static int dsa_user_setup_tc_block(struct net_device *dev, 1645 struct flow_block_offload *f) 1646 { 1647 struct flow_block_cb *block_cb; 1648 flow_setup_cb_t *cb; 1649 1650 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1651 cb = dsa_user_setup_tc_block_cb_ig; 1652 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1653 cb = dsa_user_setup_tc_block_cb_eg; 1654 else 1655 return -EOPNOTSUPP; 1656 1657 f->driver_block_list = &dsa_user_block_cb_list; 1658 1659 switch (f->command) { 1660 case FLOW_BLOCK_BIND: 1661 if (flow_block_cb_is_busy(cb, dev, &dsa_user_block_cb_list)) 1662 return -EBUSY; 1663 1664 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1665 if (IS_ERR(block_cb)) 1666 return PTR_ERR(block_cb); 1667 1668 flow_block_cb_add(block_cb, f); 1669 list_add_tail(&block_cb->driver_list, &dsa_user_block_cb_list); 1670 return 0; 1671 case FLOW_BLOCK_UNBIND: 1672 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1673 if (!block_cb) 1674 return -ENOENT; 1675 1676 flow_block_cb_remove(block_cb, f); 1677 list_del(&block_cb->driver_list); 1678 return 0; 1679 default: 1680 return -EOPNOTSUPP; 1681 } 1682 } 1683 1684 static int dsa_user_setup_ft_block(struct dsa_switch *ds, int port, 1685 void *type_data) 1686 { 1687 struct net_device *conduit = dsa_port_to_conduit(dsa_to_port(ds, port)); 1688 1689 if (!conduit->netdev_ops->ndo_setup_tc) 1690 return -EOPNOTSUPP; 1691 1692 return conduit->netdev_ops->ndo_setup_tc(conduit, TC_SETUP_FT, type_data); 1693 } 1694 1695 static int dsa_user_setup_tc(struct net_device *dev, enum tc_setup_type type, 1696 void *type_data) 1697 { 1698 struct dsa_port *dp = dsa_user_to_port(dev); 1699 struct dsa_switch *ds = dp->ds; 1700 1701 switch (type) { 1702 case TC_SETUP_BLOCK: 1703 return dsa_user_setup_tc_block(dev, type_data); 1704 case TC_SETUP_FT: 1705 return dsa_user_setup_ft_block(ds, dp->index, type_data); 1706 default: 1707 break; 1708 } 1709 1710 if (!ds->ops->port_setup_tc) 1711 return -EOPNOTSUPP; 1712 1713 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1714 } 1715 1716 static int dsa_user_get_rxnfc(struct net_device *dev, 1717 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1718 { 1719 struct dsa_port *dp = dsa_user_to_port(dev); 1720 struct dsa_switch *ds = dp->ds; 1721 1722 if (!ds->ops->get_rxnfc) 1723 return -EOPNOTSUPP; 1724 1725 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1726 } 1727 1728 static int dsa_user_set_rxnfc(struct net_device *dev, 1729 struct ethtool_rxnfc *nfc) 1730 { 1731 struct dsa_port *dp = dsa_user_to_port(dev); 1732 struct dsa_switch *ds = dp->ds; 1733 1734 if (!ds->ops->set_rxnfc) 1735 return -EOPNOTSUPP; 1736 1737 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1738 } 1739 1740 static int dsa_user_get_ts_info(struct net_device *dev, 1741 struct kernel_ethtool_ts_info *ts) 1742 { 1743 struct dsa_user_priv *p = netdev_priv(dev); 1744 struct dsa_switch *ds = p->dp->ds; 1745 1746 if (!ds->ops->get_ts_info) 1747 return -EOPNOTSUPP; 1748 1749 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1750 } 1751 1752 static int dsa_user_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1753 u16 vid) 1754 { 1755 struct dsa_port *dp = dsa_user_to_port(dev); 1756 struct switchdev_obj_port_vlan vlan = { 1757 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1758 .vid = vid, 1759 /* This API only allows programming tagged, non-PVID VIDs */ 1760 .flags = 0, 1761 }; 1762 struct netlink_ext_ack extack = {0}; 1763 struct dsa_switch *ds = dp->ds; 1764 struct netdev_hw_addr *ha; 1765 struct dsa_vlan *v; 1766 int ret; 1767 1768 /* User port... */ 1769 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1770 if (ret) { 1771 if (extack._msg) 1772 netdev_err(dev, "%s\n", extack._msg); 1773 return ret; 1774 } 1775 1776 /* And CPU port... */ 1777 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1778 if (ret) { 1779 if (extack._msg) 1780 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1781 extack._msg); 1782 return ret; 1783 } 1784 1785 if (!dsa_switch_supports_uc_filtering(ds) && 1786 !dsa_switch_supports_mc_filtering(ds)) 1787 return 0; 1788 1789 v = kzalloc(sizeof(*v), GFP_KERNEL); 1790 if (!v) { 1791 ret = -ENOMEM; 1792 goto rollback; 1793 } 1794 1795 netif_addr_lock_bh(dev); 1796 1797 v->vid = vid; 1798 list_add_tail(&v->list, &dp->user_vlans); 1799 1800 if (dsa_switch_supports_mc_filtering(ds)) { 1801 netdev_for_each_synced_mc_addr(ha, dev) { 1802 dsa_user_schedule_standalone_work(dev, DSA_MC_ADD, 1803 ha->addr, vid); 1804 } 1805 } 1806 1807 if (dsa_switch_supports_uc_filtering(ds)) { 1808 netdev_for_each_synced_uc_addr(ha, dev) { 1809 dsa_user_schedule_standalone_work(dev, DSA_UC_ADD, 1810 ha->addr, vid); 1811 } 1812 } 1813 1814 netif_addr_unlock_bh(dev); 1815 1816 dsa_flush_workqueue(); 1817 1818 return 0; 1819 1820 rollback: 1821 dsa_port_host_vlan_del(dp, &vlan); 1822 dsa_port_vlan_del(dp, &vlan); 1823 1824 return ret; 1825 } 1826 1827 static int dsa_user_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1828 u16 vid) 1829 { 1830 struct dsa_port *dp = dsa_user_to_port(dev); 1831 struct switchdev_obj_port_vlan vlan = { 1832 .vid = vid, 1833 /* This API only allows programming tagged, non-PVID VIDs */ 1834 .flags = 0, 1835 }; 1836 struct dsa_switch *ds = dp->ds; 1837 struct netdev_hw_addr *ha; 1838 struct dsa_vlan *v; 1839 int err; 1840 1841 err = dsa_port_vlan_del(dp, &vlan); 1842 if (err) 1843 return err; 1844 1845 err = dsa_port_host_vlan_del(dp, &vlan); 1846 if (err) 1847 return err; 1848 1849 if (!dsa_switch_supports_uc_filtering(ds) && 1850 !dsa_switch_supports_mc_filtering(ds)) 1851 return 0; 1852 1853 netif_addr_lock_bh(dev); 1854 1855 v = dsa_vlan_find(&dp->user_vlans, &vlan); 1856 if (!v) { 1857 netif_addr_unlock_bh(dev); 1858 return -ENOENT; 1859 } 1860 1861 list_del(&v->list); 1862 kfree(v); 1863 1864 if (dsa_switch_supports_mc_filtering(ds)) { 1865 netdev_for_each_synced_mc_addr(ha, dev) { 1866 dsa_user_schedule_standalone_work(dev, DSA_MC_DEL, 1867 ha->addr, vid); 1868 } 1869 } 1870 1871 if (dsa_switch_supports_uc_filtering(ds)) { 1872 netdev_for_each_synced_uc_addr(ha, dev) { 1873 dsa_user_schedule_standalone_work(dev, DSA_UC_DEL, 1874 ha->addr, vid); 1875 } 1876 } 1877 1878 netif_addr_unlock_bh(dev); 1879 1880 dsa_flush_workqueue(); 1881 1882 return 0; 1883 } 1884 1885 static int dsa_user_restore_vlan(struct net_device *vdev, int vid, void *arg) 1886 { 1887 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1888 1889 return dsa_user_vlan_rx_add_vid(arg, proto, vid); 1890 } 1891 1892 static int dsa_user_clear_vlan(struct net_device *vdev, int vid, void *arg) 1893 { 1894 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1895 1896 return dsa_user_vlan_rx_kill_vid(arg, proto, vid); 1897 } 1898 1899 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1900 * filtering is enabled. The baseline is that only ports that offload a 1901 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1902 * but there are exceptions for quirky hardware. 1903 * 1904 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1905 * the same switch with other ports that offload a VLAN-aware bridge are also 1906 * inevitably VLAN-aware. 1907 * 1908 * To summarize, a DSA switch port offloads: 1909 * 1910 * - If standalone (this includes software bridge, software LAG): 1911 * - if ds->needs_standalone_vlan_filtering = true, OR if 1912 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1913 * this switch chip which have vlan_filtering=1) 1914 * - the 8021q upper VLANs 1915 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1916 * global, or it is, but no port is under a VLAN-aware bridge): 1917 * - no VLAN (any 8021q upper is a software VLAN) 1918 * 1919 * - If under a vlan_filtering=0 bridge which it offload: 1920 * - if ds->configure_vlan_while_not_filtering = true (default): 1921 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1922 * - else (deprecated): 1923 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1924 * enabled, so this behavior is broken and discouraged. 1925 * 1926 * - If under a vlan_filtering=1 bridge which it offload: 1927 * - the bridge VLANs 1928 * - the 8021q upper VLANs 1929 */ 1930 int dsa_user_manage_vlan_filtering(struct net_device *user, 1931 bool vlan_filtering) 1932 { 1933 int err; 1934 1935 if (vlan_filtering) { 1936 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1937 1938 err = vlan_for_each(user, dsa_user_restore_vlan, user); 1939 if (err) { 1940 vlan_for_each(user, dsa_user_clear_vlan, user); 1941 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1942 return err; 1943 } 1944 } else { 1945 err = vlan_for_each(user, dsa_user_clear_vlan, user); 1946 if (err) 1947 return err; 1948 1949 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1950 } 1951 1952 return 0; 1953 } 1954 1955 struct dsa_hw_port { 1956 struct list_head list; 1957 struct net_device *dev; 1958 int old_mtu; 1959 }; 1960 1961 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1962 { 1963 const struct dsa_hw_port *p; 1964 int err; 1965 1966 list_for_each_entry(p, hw_port_list, list) { 1967 if (p->dev->mtu == mtu) 1968 continue; 1969 1970 err = dev_set_mtu(p->dev, mtu); 1971 if (err) 1972 goto rollback; 1973 } 1974 1975 return 0; 1976 1977 rollback: 1978 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1979 if (p->dev->mtu == p->old_mtu) 1980 continue; 1981 1982 if (dev_set_mtu(p->dev, p->old_mtu)) 1983 netdev_err(p->dev, "Failed to restore MTU\n"); 1984 } 1985 1986 return err; 1987 } 1988 1989 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1990 { 1991 struct dsa_hw_port *p, *n; 1992 1993 list_for_each_entry_safe(p, n, hw_port_list, list) 1994 kfree(p); 1995 } 1996 1997 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1998 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1999 { 2000 struct list_head hw_port_list; 2001 struct dsa_switch_tree *dst; 2002 int min_mtu = ETH_MAX_MTU; 2003 struct dsa_port *other_dp; 2004 int err; 2005 2006 if (!dp->ds->mtu_enforcement_ingress) 2007 return; 2008 2009 if (!dp->bridge) 2010 return; 2011 2012 INIT_LIST_HEAD(&hw_port_list); 2013 2014 /* Populate the list of ports that are part of the same bridge 2015 * as the newly added/modified port 2016 */ 2017 list_for_each_entry(dst, &dsa_tree_list, list) { 2018 list_for_each_entry(other_dp, &dst->ports, list) { 2019 struct dsa_hw_port *hw_port; 2020 struct net_device *user; 2021 2022 if (other_dp->type != DSA_PORT_TYPE_USER) 2023 continue; 2024 2025 if (!dsa_port_bridge_same(dp, other_dp)) 2026 continue; 2027 2028 if (!other_dp->ds->mtu_enforcement_ingress) 2029 continue; 2030 2031 user = other_dp->user; 2032 2033 if (min_mtu > user->mtu) 2034 min_mtu = user->mtu; 2035 2036 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 2037 if (!hw_port) 2038 goto out; 2039 2040 hw_port->dev = user; 2041 hw_port->old_mtu = user->mtu; 2042 2043 list_add(&hw_port->list, &hw_port_list); 2044 } 2045 } 2046 2047 /* Attempt to configure the entire hardware bridge to the newly added 2048 * interface's MTU first, regardless of whether the intention of the 2049 * user was to raise or lower it. 2050 */ 2051 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->user->mtu); 2052 if (!err) 2053 goto out; 2054 2055 /* Clearly that didn't work out so well, so just set the minimum MTU on 2056 * all hardware bridge ports now. If this fails too, then all ports will 2057 * still have their old MTU rolled back anyway. 2058 */ 2059 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 2060 2061 out: 2062 dsa_hw_port_list_free(&hw_port_list); 2063 } 2064 2065 int dsa_user_change_mtu(struct net_device *dev, int new_mtu) 2066 { 2067 struct net_device *conduit = dsa_user_to_conduit(dev); 2068 struct dsa_port *dp = dsa_user_to_port(dev); 2069 struct dsa_port *cpu_dp = dp->cpu_dp; 2070 struct dsa_switch *ds = dp->ds; 2071 struct dsa_port *other_dp; 2072 int largest_mtu = 0; 2073 int new_conduit_mtu; 2074 int old_conduit_mtu; 2075 int mtu_limit; 2076 int overhead; 2077 int cpu_mtu; 2078 int err; 2079 2080 if (!ds->ops->port_change_mtu) 2081 return -EOPNOTSUPP; 2082 2083 dsa_tree_for_each_user_port(other_dp, ds->dst) { 2084 int user_mtu; 2085 2086 /* During probe, this function will be called for each user 2087 * device, while not all of them have been allocated. That's 2088 * ok, it doesn't change what the maximum is, so ignore it. 2089 */ 2090 if (!other_dp->user) 2091 continue; 2092 2093 /* Pretend that we already applied the setting, which we 2094 * actually haven't (still haven't done all integrity checks) 2095 */ 2096 if (dp == other_dp) 2097 user_mtu = new_mtu; 2098 else 2099 user_mtu = other_dp->user->mtu; 2100 2101 if (largest_mtu < user_mtu) 2102 largest_mtu = user_mtu; 2103 } 2104 2105 overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops); 2106 mtu_limit = min_t(int, conduit->max_mtu, dev->max_mtu + overhead); 2107 old_conduit_mtu = conduit->mtu; 2108 new_conduit_mtu = largest_mtu + overhead; 2109 if (new_conduit_mtu > mtu_limit) 2110 return -ERANGE; 2111 2112 /* If the conduit MTU isn't over limit, there's no need to check the CPU 2113 * MTU, since that surely isn't either. 2114 */ 2115 cpu_mtu = largest_mtu; 2116 2117 /* Start applying stuff */ 2118 if (new_conduit_mtu != old_conduit_mtu) { 2119 err = dev_set_mtu(conduit, new_conduit_mtu); 2120 if (err < 0) 2121 goto out_conduit_failed; 2122 2123 /* We only need to propagate the MTU of the CPU port to 2124 * upstream switches, so emit a notifier which updates them. 2125 */ 2126 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 2127 if (err) 2128 goto out_cpu_failed; 2129 } 2130 2131 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 2132 if (err) 2133 goto out_port_failed; 2134 2135 WRITE_ONCE(dev->mtu, new_mtu); 2136 2137 dsa_bridge_mtu_normalization(dp); 2138 2139 return 0; 2140 2141 out_port_failed: 2142 if (new_conduit_mtu != old_conduit_mtu) 2143 dsa_port_mtu_change(cpu_dp, old_conduit_mtu - overhead); 2144 out_cpu_failed: 2145 if (new_conduit_mtu != old_conduit_mtu) 2146 dev_set_mtu(conduit, old_conduit_mtu); 2147 out_conduit_failed: 2148 return err; 2149 } 2150 2151 static int __maybe_unused 2152 dsa_user_dcbnl_set_apptrust(struct net_device *dev, u8 *sel, int nsel) 2153 { 2154 struct dsa_port *dp = dsa_user_to_port(dev); 2155 struct dsa_switch *ds = dp->ds; 2156 int port = dp->index; 2157 2158 if (!ds->ops->port_set_apptrust) 2159 return -EOPNOTSUPP; 2160 2161 return ds->ops->port_set_apptrust(ds, port, sel, nsel); 2162 } 2163 2164 static int __maybe_unused 2165 dsa_user_dcbnl_get_apptrust(struct net_device *dev, u8 *sel, int *nsel) 2166 { 2167 struct dsa_port *dp = dsa_user_to_port(dev); 2168 struct dsa_switch *ds = dp->ds; 2169 int port = dp->index; 2170 2171 if (!ds->ops->port_get_apptrust) 2172 return -EOPNOTSUPP; 2173 2174 return ds->ops->port_get_apptrust(ds, port, sel, nsel); 2175 } 2176 2177 static int __maybe_unused 2178 dsa_user_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 2179 { 2180 struct dsa_port *dp = dsa_user_to_port(dev); 2181 struct dsa_switch *ds = dp->ds; 2182 unsigned long mask, new_prio; 2183 int err, port = dp->index; 2184 2185 if (!ds->ops->port_set_default_prio) 2186 return -EOPNOTSUPP; 2187 2188 err = dcb_ieee_setapp(dev, app); 2189 if (err) 2190 return err; 2191 2192 mask = dcb_ieee_getapp_mask(dev, app); 2193 new_prio = __fls(mask); 2194 2195 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2196 if (err) { 2197 dcb_ieee_delapp(dev, app); 2198 return err; 2199 } 2200 2201 return 0; 2202 } 2203 2204 /* Update the DSCP prio entries on all user ports of the switch in case 2205 * the switch supports global DSCP prio instead of per port DSCP prios. 2206 */ 2207 static int dsa_user_dcbnl_ieee_global_dscp_setdel(struct net_device *dev, 2208 struct dcb_app *app, bool del) 2209 { 2210 int (*setdel)(struct net_device *dev, struct dcb_app *app); 2211 struct dsa_port *dp = dsa_user_to_port(dev); 2212 struct dsa_switch *ds = dp->ds; 2213 struct dsa_port *other_dp; 2214 int err, restore_err; 2215 2216 if (del) 2217 setdel = dcb_ieee_delapp; 2218 else 2219 setdel = dcb_ieee_setapp; 2220 2221 dsa_switch_for_each_user_port(other_dp, ds) { 2222 struct net_device *user = other_dp->user; 2223 2224 if (!user || user == dev) 2225 continue; 2226 2227 err = setdel(user, app); 2228 if (err) 2229 goto err_try_to_restore; 2230 } 2231 2232 return 0; 2233 2234 err_try_to_restore: 2235 2236 /* Revert logic to restore previous state of app entries */ 2237 if (!del) 2238 setdel = dcb_ieee_delapp; 2239 else 2240 setdel = dcb_ieee_setapp; 2241 2242 dsa_switch_for_each_user_port_continue_reverse(other_dp, ds) { 2243 struct net_device *user = other_dp->user; 2244 2245 if (!user || user == dev) 2246 continue; 2247 2248 restore_err = setdel(user, app); 2249 if (restore_err) 2250 netdev_err(user, "Failed to restore DSCP prio entry configuration\n"); 2251 } 2252 2253 return err; 2254 } 2255 2256 static int __maybe_unused 2257 dsa_user_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 2258 { 2259 struct dsa_port *dp = dsa_user_to_port(dev); 2260 struct dsa_switch *ds = dp->ds; 2261 unsigned long mask, new_prio; 2262 int err, port = dp->index; 2263 u8 dscp = app->protocol; 2264 2265 if (!ds->ops->port_add_dscp_prio) 2266 return -EOPNOTSUPP; 2267 2268 if (dscp >= 64) { 2269 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 2270 dscp); 2271 return -EINVAL; 2272 } 2273 2274 err = dcb_ieee_setapp(dev, app); 2275 if (err) 2276 return err; 2277 2278 mask = dcb_ieee_getapp_mask(dev, app); 2279 new_prio = __fls(mask); 2280 2281 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 2282 if (err) { 2283 dcb_ieee_delapp(dev, app); 2284 return err; 2285 } 2286 2287 if (!ds->dscp_prio_mapping_is_global) 2288 return 0; 2289 2290 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, false); 2291 if (err) { 2292 if (ds->ops->port_del_dscp_prio) 2293 ds->ops->port_del_dscp_prio(ds, port, dscp, new_prio); 2294 dcb_ieee_delapp(dev, app); 2295 return err; 2296 } 2297 2298 return 0; 2299 } 2300 2301 static int __maybe_unused dsa_user_dcbnl_ieee_setapp(struct net_device *dev, 2302 struct dcb_app *app) 2303 { 2304 switch (app->selector) { 2305 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2306 switch (app->protocol) { 2307 case 0: 2308 return dsa_user_dcbnl_set_default_prio(dev, app); 2309 default: 2310 return -EOPNOTSUPP; 2311 } 2312 break; 2313 case IEEE_8021QAZ_APP_SEL_DSCP: 2314 return dsa_user_dcbnl_add_dscp_prio(dev, app); 2315 default: 2316 return -EOPNOTSUPP; 2317 } 2318 } 2319 2320 static int __maybe_unused 2321 dsa_user_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2322 { 2323 struct dsa_port *dp = dsa_user_to_port(dev); 2324 struct dsa_switch *ds = dp->ds; 2325 unsigned long mask, new_prio; 2326 int err, port = dp->index; 2327 2328 if (!ds->ops->port_set_default_prio) 2329 return -EOPNOTSUPP; 2330 2331 err = dcb_ieee_delapp(dev, app); 2332 if (err) 2333 return err; 2334 2335 mask = dcb_ieee_getapp_mask(dev, app); 2336 new_prio = mask ? __fls(mask) : 0; 2337 2338 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2339 if (err) { 2340 dcb_ieee_setapp(dev, app); 2341 return err; 2342 } 2343 2344 return 0; 2345 } 2346 2347 static int __maybe_unused 2348 dsa_user_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2349 { 2350 struct dsa_port *dp = dsa_user_to_port(dev); 2351 struct dsa_switch *ds = dp->ds; 2352 int err, port = dp->index; 2353 u8 dscp = app->protocol; 2354 2355 if (!ds->ops->port_del_dscp_prio) 2356 return -EOPNOTSUPP; 2357 2358 err = dcb_ieee_delapp(dev, app); 2359 if (err) 2360 return err; 2361 2362 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2363 if (err) { 2364 dcb_ieee_setapp(dev, app); 2365 return err; 2366 } 2367 2368 if (!ds->dscp_prio_mapping_is_global) 2369 return 0; 2370 2371 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, true); 2372 if (err) { 2373 if (ds->ops->port_add_dscp_prio) 2374 ds->ops->port_add_dscp_prio(ds, port, dscp, 2375 app->priority); 2376 dcb_ieee_setapp(dev, app); 2377 return err; 2378 } 2379 2380 return 0; 2381 } 2382 2383 static int __maybe_unused dsa_user_dcbnl_ieee_delapp(struct net_device *dev, 2384 struct dcb_app *app) 2385 { 2386 switch (app->selector) { 2387 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2388 switch (app->protocol) { 2389 case 0: 2390 return dsa_user_dcbnl_del_default_prio(dev, app); 2391 default: 2392 return -EOPNOTSUPP; 2393 } 2394 break; 2395 case IEEE_8021QAZ_APP_SEL_DSCP: 2396 return dsa_user_dcbnl_del_dscp_prio(dev, app); 2397 default: 2398 return -EOPNOTSUPP; 2399 } 2400 } 2401 2402 /* Pre-populate the DCB application priority table with the priorities 2403 * configured during switch setup, which we read from hardware here. 2404 */ 2405 static int dsa_user_dcbnl_init(struct net_device *dev) 2406 { 2407 struct dsa_port *dp = dsa_user_to_port(dev); 2408 struct dsa_switch *ds = dp->ds; 2409 int port = dp->index; 2410 int err; 2411 2412 if (ds->ops->port_get_default_prio) { 2413 int prio = ds->ops->port_get_default_prio(ds, port); 2414 struct dcb_app app = { 2415 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2416 .protocol = 0, 2417 .priority = prio, 2418 }; 2419 2420 if (prio < 0) 2421 return prio; 2422 2423 err = dcb_ieee_setapp(dev, &app); 2424 if (err) 2425 return err; 2426 } 2427 2428 if (ds->ops->port_get_dscp_prio) { 2429 int protocol; 2430 2431 for (protocol = 0; protocol < 64; protocol++) { 2432 struct dcb_app app = { 2433 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2434 .protocol = protocol, 2435 }; 2436 int prio; 2437 2438 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2439 if (prio == -EOPNOTSUPP) 2440 continue; 2441 if (prio < 0) 2442 return prio; 2443 2444 app.priority = prio; 2445 2446 err = dcb_ieee_setapp(dev, &app); 2447 if (err) 2448 return err; 2449 } 2450 } 2451 2452 return 0; 2453 } 2454 2455 static const struct ethtool_ops dsa_user_ethtool_ops = { 2456 .get_drvinfo = dsa_user_get_drvinfo, 2457 .get_regs_len = dsa_user_get_regs_len, 2458 .get_regs = dsa_user_get_regs, 2459 .nway_reset = dsa_user_nway_reset, 2460 .get_link = ethtool_op_get_link, 2461 .get_eeprom_len = dsa_user_get_eeprom_len, 2462 .get_eeprom = dsa_user_get_eeprom, 2463 .set_eeprom = dsa_user_set_eeprom, 2464 .get_strings = dsa_user_get_strings, 2465 .get_ethtool_stats = dsa_user_get_ethtool_stats, 2466 .get_sset_count = dsa_user_get_sset_count, 2467 .get_eth_phy_stats = dsa_user_get_eth_phy_stats, 2468 .get_eth_mac_stats = dsa_user_get_eth_mac_stats, 2469 .get_eth_ctrl_stats = dsa_user_get_eth_ctrl_stats, 2470 .get_rmon_stats = dsa_user_get_rmon_stats, 2471 .set_wol = dsa_user_set_wol, 2472 .get_wol = dsa_user_get_wol, 2473 .set_eee = dsa_user_set_eee, 2474 .get_eee = dsa_user_get_eee, 2475 .get_link_ksettings = dsa_user_get_link_ksettings, 2476 .set_link_ksettings = dsa_user_set_link_ksettings, 2477 .get_pause_stats = dsa_user_get_pause_stats, 2478 .get_pauseparam = dsa_user_get_pauseparam, 2479 .set_pauseparam = dsa_user_set_pauseparam, 2480 .get_rxnfc = dsa_user_get_rxnfc, 2481 .set_rxnfc = dsa_user_set_rxnfc, 2482 .get_ts_info = dsa_user_get_ts_info, 2483 .self_test = dsa_user_net_selftest, 2484 .get_mm = dsa_user_get_mm, 2485 .set_mm = dsa_user_set_mm, 2486 .get_mm_stats = dsa_user_get_mm_stats, 2487 }; 2488 2489 static const struct dcbnl_rtnl_ops __maybe_unused dsa_user_dcbnl_ops = { 2490 .ieee_setapp = dsa_user_dcbnl_ieee_setapp, 2491 .ieee_delapp = dsa_user_dcbnl_ieee_delapp, 2492 .dcbnl_setapptrust = dsa_user_dcbnl_set_apptrust, 2493 .dcbnl_getapptrust = dsa_user_dcbnl_get_apptrust, 2494 }; 2495 2496 static void dsa_user_get_stats64(struct net_device *dev, 2497 struct rtnl_link_stats64 *s) 2498 { 2499 struct dsa_port *dp = dsa_user_to_port(dev); 2500 struct dsa_switch *ds = dp->ds; 2501 2502 if (ds->ops->get_stats64) 2503 ds->ops->get_stats64(ds, dp->index, s); 2504 else 2505 dev_get_tstats64(dev, s); 2506 } 2507 2508 static int dsa_user_fill_forward_path(struct net_device_path_ctx *ctx, 2509 struct net_device_path *path) 2510 { 2511 struct dsa_port *dp = dsa_user_to_port(ctx->dev); 2512 struct net_device *conduit = dsa_port_to_conduit(dp); 2513 struct dsa_port *cpu_dp = dp->cpu_dp; 2514 2515 path->dev = ctx->dev; 2516 path->type = DEV_PATH_DSA; 2517 path->dsa.proto = cpu_dp->tag_ops->proto; 2518 path->dsa.port = dp->index; 2519 ctx->dev = conduit; 2520 2521 return 0; 2522 } 2523 2524 static const struct net_device_ops dsa_user_netdev_ops = { 2525 .ndo_open = dsa_user_open, 2526 .ndo_stop = dsa_user_close, 2527 .ndo_start_xmit = dsa_user_xmit, 2528 .ndo_change_rx_flags = dsa_user_change_rx_flags, 2529 .ndo_set_rx_mode = dsa_user_set_rx_mode, 2530 .ndo_set_mac_address = dsa_user_set_mac_address, 2531 .ndo_fdb_dump = dsa_user_fdb_dump, 2532 .ndo_eth_ioctl = dsa_user_ioctl, 2533 .ndo_get_iflink = dsa_user_get_iflink, 2534 #ifdef CONFIG_NET_POLL_CONTROLLER 2535 .ndo_netpoll_setup = dsa_user_netpoll_setup, 2536 .ndo_netpoll_cleanup = dsa_user_netpoll_cleanup, 2537 .ndo_poll_controller = dsa_user_poll_controller, 2538 #endif 2539 .ndo_setup_tc = dsa_user_setup_tc, 2540 .ndo_get_stats64 = dsa_user_get_stats64, 2541 .ndo_vlan_rx_add_vid = dsa_user_vlan_rx_add_vid, 2542 .ndo_vlan_rx_kill_vid = dsa_user_vlan_rx_kill_vid, 2543 .ndo_change_mtu = dsa_user_change_mtu, 2544 .ndo_fill_forward_path = dsa_user_fill_forward_path, 2545 }; 2546 2547 static const struct device_type dsa_type = { 2548 .name = "dsa", 2549 }; 2550 2551 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2552 { 2553 const struct dsa_port *dp = dsa_to_port(ds, port); 2554 2555 if (dp->pl) 2556 phylink_mac_change(dp->pl, up); 2557 } 2558 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2559 2560 static void dsa_user_phylink_fixed_state(struct phylink_config *config, 2561 struct phylink_link_state *state) 2562 { 2563 struct dsa_port *dp = dsa_phylink_to_port(config); 2564 struct dsa_switch *ds = dp->ds; 2565 2566 /* No need to check that this operation is valid, the callback would 2567 * not be called if it was not. 2568 */ 2569 ds->ops->phylink_fixed_state(ds, dp->index, state); 2570 } 2571 2572 /* user device setup *******************************************************/ 2573 static int dsa_user_phy_connect(struct net_device *user_dev, int addr, 2574 u32 flags) 2575 { 2576 struct dsa_port *dp = dsa_user_to_port(user_dev); 2577 struct dsa_switch *ds = dp->ds; 2578 2579 user_dev->phydev = mdiobus_get_phy(ds->user_mii_bus, addr); 2580 if (!user_dev->phydev) { 2581 netdev_err(user_dev, "no phy at %d\n", addr); 2582 return -ENODEV; 2583 } 2584 2585 user_dev->phydev->dev_flags |= flags; 2586 2587 return phylink_connect_phy(dp->pl, user_dev->phydev); 2588 } 2589 2590 static int dsa_user_phy_setup(struct net_device *user_dev) 2591 { 2592 struct dsa_port *dp = dsa_user_to_port(user_dev); 2593 struct device_node *port_dn = dp->dn; 2594 struct dsa_switch *ds = dp->ds; 2595 u32 phy_flags = 0; 2596 int ret; 2597 2598 dp->pl_config.dev = &user_dev->dev; 2599 dp->pl_config.type = PHYLINK_NETDEV; 2600 2601 /* The get_fixed_state callback takes precedence over polling the 2602 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2603 * this if the switch provides such a callback. 2604 */ 2605 if (ds->ops->phylink_fixed_state) { 2606 dp->pl_config.get_fixed_state = dsa_user_phylink_fixed_state; 2607 dp->pl_config.poll_fixed_state = true; 2608 } 2609 2610 ret = dsa_port_phylink_create(dp); 2611 if (ret) 2612 return ret; 2613 2614 if (ds->ops->get_phy_flags) 2615 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2616 2617 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2618 if (ret == -ENODEV && ds->user_mii_bus) { 2619 /* We could not connect to a designated PHY or SFP, so try to 2620 * use the switch internal MDIO bus instead 2621 */ 2622 ret = dsa_user_phy_connect(user_dev, dp->index, phy_flags); 2623 } 2624 if (ret) { 2625 netdev_err(user_dev, "failed to connect to PHY: %pe\n", 2626 ERR_PTR(ret)); 2627 dsa_port_phylink_destroy(dp); 2628 } 2629 2630 return ret; 2631 } 2632 2633 void dsa_user_setup_tagger(struct net_device *user) 2634 { 2635 struct dsa_port *dp = dsa_user_to_port(user); 2636 struct net_device *conduit = dsa_port_to_conduit(dp); 2637 struct dsa_user_priv *p = netdev_priv(user); 2638 const struct dsa_port *cpu_dp = dp->cpu_dp; 2639 const struct dsa_switch *ds = dp->ds; 2640 2641 user->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2642 user->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2643 /* Try to save one extra realloc later in the TX path (in the conduit) 2644 * by also inheriting the conduit's needed headroom and tailroom. 2645 * The 8021q driver also does this. 2646 */ 2647 user->needed_headroom += conduit->needed_headroom; 2648 user->needed_tailroom += conduit->needed_tailroom; 2649 2650 p->xmit = cpu_dp->tag_ops->xmit; 2651 2652 user->features = conduit->vlan_features | NETIF_F_HW_TC; 2653 user->hw_features |= NETIF_F_HW_TC; 2654 if (user->needed_tailroom) 2655 user->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2656 if (ds->needs_standalone_vlan_filtering) 2657 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2658 2659 user->lltx = true; 2660 } 2661 2662 int dsa_user_suspend(struct net_device *user_dev) 2663 { 2664 struct dsa_port *dp = dsa_user_to_port(user_dev); 2665 2666 if (!netif_running(user_dev)) 2667 return 0; 2668 2669 netif_device_detach(user_dev); 2670 2671 rtnl_lock(); 2672 phylink_stop(dp->pl); 2673 rtnl_unlock(); 2674 2675 return 0; 2676 } 2677 2678 int dsa_user_resume(struct net_device *user_dev) 2679 { 2680 struct dsa_port *dp = dsa_user_to_port(user_dev); 2681 2682 if (!netif_running(user_dev)) 2683 return 0; 2684 2685 netif_device_attach(user_dev); 2686 2687 rtnl_lock(); 2688 phylink_start(dp->pl); 2689 rtnl_unlock(); 2690 2691 return 0; 2692 } 2693 2694 int dsa_user_create(struct dsa_port *port) 2695 { 2696 struct net_device *conduit = dsa_port_to_conduit(port); 2697 struct dsa_switch *ds = port->ds; 2698 struct net_device *user_dev; 2699 struct dsa_user_priv *p; 2700 const char *name; 2701 int assign_type; 2702 int ret; 2703 2704 if (!ds->num_tx_queues) 2705 ds->num_tx_queues = 1; 2706 2707 if (port->name) { 2708 name = port->name; 2709 assign_type = NET_NAME_PREDICTABLE; 2710 } else { 2711 name = "eth%d"; 2712 assign_type = NET_NAME_ENUM; 2713 } 2714 2715 user_dev = alloc_netdev_mqs(sizeof(struct dsa_user_priv), name, 2716 assign_type, ether_setup, 2717 ds->num_tx_queues, 1); 2718 if (user_dev == NULL) 2719 return -ENOMEM; 2720 2721 user_dev->rtnl_link_ops = &dsa_link_ops; 2722 user_dev->ethtool_ops = &dsa_user_ethtool_ops; 2723 #if IS_ENABLED(CONFIG_DCB) 2724 user_dev->dcbnl_ops = &dsa_user_dcbnl_ops; 2725 #endif 2726 if (!is_zero_ether_addr(port->mac)) 2727 eth_hw_addr_set(user_dev, port->mac); 2728 else 2729 eth_hw_addr_inherit(user_dev, conduit); 2730 user_dev->priv_flags |= IFF_NO_QUEUE; 2731 if (dsa_switch_supports_uc_filtering(ds)) 2732 user_dev->priv_flags |= IFF_UNICAST_FLT; 2733 user_dev->netdev_ops = &dsa_user_netdev_ops; 2734 if (ds->ops->port_max_mtu) 2735 user_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2736 SET_NETDEV_DEVTYPE(user_dev, &dsa_type); 2737 2738 SET_NETDEV_DEV(user_dev, port->ds->dev); 2739 SET_NETDEV_DEVLINK_PORT(user_dev, &port->devlink_port); 2740 user_dev->dev.of_node = port->dn; 2741 user_dev->vlan_features = conduit->vlan_features; 2742 2743 p = netdev_priv(user_dev); 2744 user_dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2745 2746 ret = gro_cells_init(&p->gcells, user_dev); 2747 if (ret) 2748 goto out_free; 2749 2750 p->dp = port; 2751 INIT_LIST_HEAD(&p->mall_tc_list); 2752 port->user = user_dev; 2753 dsa_user_setup_tagger(user_dev); 2754 2755 netif_carrier_off(user_dev); 2756 2757 ret = dsa_user_phy_setup(user_dev); 2758 if (ret) { 2759 netdev_err(user_dev, 2760 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2761 ret, ds->dst->index, ds->index, port->index); 2762 goto out_gcells; 2763 } 2764 2765 rtnl_lock(); 2766 2767 ret = dsa_user_change_mtu(user_dev, ETH_DATA_LEN); 2768 if (ret && ret != -EOPNOTSUPP) 2769 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2770 ret, ETH_DATA_LEN, port->index); 2771 2772 ret = register_netdevice(user_dev); 2773 if (ret) { 2774 netdev_err(conduit, "error %d registering interface %s\n", 2775 ret, user_dev->name); 2776 rtnl_unlock(); 2777 goto out_phy; 2778 } 2779 2780 if (IS_ENABLED(CONFIG_DCB)) { 2781 ret = dsa_user_dcbnl_init(user_dev); 2782 if (ret) { 2783 netdev_err(user_dev, 2784 "failed to initialize DCB: %pe\n", 2785 ERR_PTR(ret)); 2786 rtnl_unlock(); 2787 goto out_unregister; 2788 } 2789 } 2790 2791 ret = netdev_upper_dev_link(conduit, user_dev, NULL); 2792 2793 rtnl_unlock(); 2794 2795 if (ret) 2796 goto out_unregister; 2797 2798 return 0; 2799 2800 out_unregister: 2801 unregister_netdev(user_dev); 2802 out_phy: 2803 rtnl_lock(); 2804 phylink_disconnect_phy(p->dp->pl); 2805 rtnl_unlock(); 2806 dsa_port_phylink_destroy(p->dp); 2807 out_gcells: 2808 gro_cells_destroy(&p->gcells); 2809 out_free: 2810 free_netdev(user_dev); 2811 port->user = NULL; 2812 return ret; 2813 } 2814 2815 void dsa_user_destroy(struct net_device *user_dev) 2816 { 2817 struct net_device *conduit = dsa_user_to_conduit(user_dev); 2818 struct dsa_port *dp = dsa_user_to_port(user_dev); 2819 struct dsa_user_priv *p = netdev_priv(user_dev); 2820 2821 netif_carrier_off(user_dev); 2822 rtnl_lock(); 2823 netdev_upper_dev_unlink(conduit, user_dev); 2824 unregister_netdevice(user_dev); 2825 phylink_disconnect_phy(dp->pl); 2826 rtnl_unlock(); 2827 2828 dsa_port_phylink_destroy(dp); 2829 gro_cells_destroy(&p->gcells); 2830 free_netdev(user_dev); 2831 } 2832 2833 int dsa_user_change_conduit(struct net_device *dev, struct net_device *conduit, 2834 struct netlink_ext_ack *extack) 2835 { 2836 struct net_device *old_conduit = dsa_user_to_conduit(dev); 2837 struct dsa_port *dp = dsa_user_to_port(dev); 2838 struct dsa_switch *ds = dp->ds; 2839 struct net_device *upper; 2840 struct list_head *iter; 2841 int err; 2842 2843 if (conduit == old_conduit) 2844 return 0; 2845 2846 if (!ds->ops->port_change_conduit) { 2847 NL_SET_ERR_MSG_MOD(extack, 2848 "Driver does not support changing DSA conduit"); 2849 return -EOPNOTSUPP; 2850 } 2851 2852 if (!netdev_uses_dsa(conduit)) { 2853 NL_SET_ERR_MSG_MOD(extack, 2854 "Interface not eligible as DSA conduit"); 2855 return -EOPNOTSUPP; 2856 } 2857 2858 netdev_for_each_upper_dev_rcu(conduit, upper, iter) { 2859 if (dsa_user_dev_check(upper)) 2860 continue; 2861 if (netif_is_bridge_master(upper)) 2862 continue; 2863 NL_SET_ERR_MSG_MOD(extack, "Cannot join conduit with unknown uppers"); 2864 return -EOPNOTSUPP; 2865 } 2866 2867 /* Since we allow live-changing the DSA conduit, plus we auto-open the 2868 * DSA conduit when the user port opens => we need to ensure that the 2869 * new DSA conduit is open too. 2870 */ 2871 if (dev->flags & IFF_UP) { 2872 err = dev_open(conduit, extack); 2873 if (err) 2874 return err; 2875 } 2876 2877 netdev_upper_dev_unlink(old_conduit, dev); 2878 2879 err = netdev_upper_dev_link(conduit, dev, extack); 2880 if (err) 2881 goto out_revert_old_conduit_unlink; 2882 2883 err = dsa_port_change_conduit(dp, conduit, extack); 2884 if (err) 2885 goto out_revert_conduit_link; 2886 2887 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2888 err = dsa_user_change_mtu(dev, dev->mtu); 2889 if (err && err != -EOPNOTSUPP) { 2890 netdev_warn(dev, 2891 "nonfatal error updating MTU with new conduit: %pe\n", 2892 ERR_PTR(err)); 2893 } 2894 2895 return 0; 2896 2897 out_revert_conduit_link: 2898 netdev_upper_dev_unlink(conduit, dev); 2899 out_revert_old_conduit_unlink: 2900 netdev_upper_dev_link(old_conduit, dev, NULL); 2901 return err; 2902 } 2903 2904 bool dsa_user_dev_check(const struct net_device *dev) 2905 { 2906 return dev->netdev_ops == &dsa_user_netdev_ops; 2907 } 2908 EXPORT_SYMBOL_GPL(dsa_user_dev_check); 2909 2910 static int dsa_user_changeupper(struct net_device *dev, 2911 struct netdev_notifier_changeupper_info *info) 2912 { 2913 struct netlink_ext_ack *extack; 2914 int err = NOTIFY_DONE; 2915 struct dsa_port *dp; 2916 2917 if (!dsa_user_dev_check(dev)) 2918 return err; 2919 2920 dp = dsa_user_to_port(dev); 2921 extack = netdev_notifier_info_to_extack(&info->info); 2922 2923 if (netif_is_bridge_master(info->upper_dev)) { 2924 if (info->linking) { 2925 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2926 if (!err) 2927 dsa_bridge_mtu_normalization(dp); 2928 if (err == -EOPNOTSUPP) { 2929 NL_SET_ERR_MSG_WEAK_MOD(extack, 2930 "Offloading not supported"); 2931 err = 0; 2932 } 2933 err = notifier_from_errno(err); 2934 } else { 2935 dsa_port_bridge_leave(dp, info->upper_dev); 2936 err = NOTIFY_OK; 2937 } 2938 } else if (netif_is_lag_master(info->upper_dev)) { 2939 if (info->linking) { 2940 err = dsa_port_lag_join(dp, info->upper_dev, 2941 info->upper_info, extack); 2942 if (err == -EOPNOTSUPP) { 2943 NL_SET_ERR_MSG_WEAK_MOD(extack, 2944 "Offloading not supported"); 2945 err = 0; 2946 } 2947 err = notifier_from_errno(err); 2948 } else { 2949 dsa_port_lag_leave(dp, info->upper_dev); 2950 err = NOTIFY_OK; 2951 } 2952 } else if (is_hsr_master(info->upper_dev)) { 2953 if (info->linking) { 2954 err = dsa_port_hsr_join(dp, info->upper_dev, extack); 2955 if (err == -EOPNOTSUPP) { 2956 NL_SET_ERR_MSG_WEAK_MOD(extack, 2957 "Offloading not supported"); 2958 err = 0; 2959 } 2960 err = notifier_from_errno(err); 2961 } else { 2962 dsa_port_hsr_leave(dp, info->upper_dev); 2963 err = NOTIFY_OK; 2964 } 2965 } 2966 2967 return err; 2968 } 2969 2970 static int dsa_user_prechangeupper(struct net_device *dev, 2971 struct netdev_notifier_changeupper_info *info) 2972 { 2973 struct dsa_port *dp; 2974 2975 if (!dsa_user_dev_check(dev)) 2976 return NOTIFY_DONE; 2977 2978 dp = dsa_user_to_port(dev); 2979 2980 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2981 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2982 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2983 dsa_port_pre_lag_leave(dp, info->upper_dev); 2984 /* dsa_port_pre_hsr_leave is not yet necessary since hsr devices cannot 2985 * meaningfully placed under a bridge yet 2986 */ 2987 2988 return NOTIFY_DONE; 2989 } 2990 2991 static int 2992 dsa_user_lag_changeupper(struct net_device *dev, 2993 struct netdev_notifier_changeupper_info *info) 2994 { 2995 struct net_device *lower; 2996 struct list_head *iter; 2997 int err = NOTIFY_DONE; 2998 struct dsa_port *dp; 2999 3000 if (!netif_is_lag_master(dev)) 3001 return err; 3002 3003 netdev_for_each_lower_dev(dev, lower, iter) { 3004 if (!dsa_user_dev_check(lower)) 3005 continue; 3006 3007 dp = dsa_user_to_port(lower); 3008 if (!dp->lag) 3009 /* Software LAG */ 3010 continue; 3011 3012 err = dsa_user_changeupper(lower, info); 3013 if (notifier_to_errno(err)) 3014 break; 3015 } 3016 3017 return err; 3018 } 3019 3020 /* Same as dsa_user_lag_changeupper() except that it calls 3021 * dsa_user_prechangeupper() 3022 */ 3023 static int 3024 dsa_user_lag_prechangeupper(struct net_device *dev, 3025 struct netdev_notifier_changeupper_info *info) 3026 { 3027 struct net_device *lower; 3028 struct list_head *iter; 3029 int err = NOTIFY_DONE; 3030 struct dsa_port *dp; 3031 3032 if (!netif_is_lag_master(dev)) 3033 return err; 3034 3035 netdev_for_each_lower_dev(dev, lower, iter) { 3036 if (!dsa_user_dev_check(lower)) 3037 continue; 3038 3039 dp = dsa_user_to_port(lower); 3040 if (!dp->lag) 3041 /* Software LAG */ 3042 continue; 3043 3044 err = dsa_user_prechangeupper(lower, info); 3045 if (notifier_to_errno(err)) 3046 break; 3047 } 3048 3049 return err; 3050 } 3051 3052 static int 3053 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 3054 struct netdev_notifier_changeupper_info *info) 3055 { 3056 struct netlink_ext_ack *ext_ack; 3057 struct net_device *user, *br; 3058 struct dsa_port *dp; 3059 3060 ext_ack = netdev_notifier_info_to_extack(&info->info); 3061 3062 if (!is_vlan_dev(dev)) 3063 return NOTIFY_DONE; 3064 3065 user = vlan_dev_real_dev(dev); 3066 if (!dsa_user_dev_check(user)) 3067 return NOTIFY_DONE; 3068 3069 dp = dsa_user_to_port(user); 3070 br = dsa_port_bridge_dev_get(dp); 3071 if (!br) 3072 return NOTIFY_DONE; 3073 3074 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 3075 if (br_vlan_enabled(br) && 3076 netif_is_bridge_master(info->upper_dev) && info->linking) { 3077 NL_SET_ERR_MSG_MOD(ext_ack, 3078 "Cannot make VLAN device join VLAN-aware bridge"); 3079 return notifier_from_errno(-EINVAL); 3080 } 3081 3082 return NOTIFY_DONE; 3083 } 3084 3085 static int 3086 dsa_user_check_8021q_upper(struct net_device *dev, 3087 struct netdev_notifier_changeupper_info *info) 3088 { 3089 struct dsa_port *dp = dsa_user_to_port(dev); 3090 struct net_device *br = dsa_port_bridge_dev_get(dp); 3091 struct bridge_vlan_info br_info; 3092 struct netlink_ext_ack *extack; 3093 int err = NOTIFY_DONE; 3094 u16 vid; 3095 3096 if (!br || !br_vlan_enabled(br)) 3097 return NOTIFY_DONE; 3098 3099 extack = netdev_notifier_info_to_extack(&info->info); 3100 vid = vlan_dev_vlan_id(info->upper_dev); 3101 3102 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 3103 * device, respectively the VID is not found, returning 3104 * 0 means success, which is a failure for us here. 3105 */ 3106 err = br_vlan_get_info(br, vid, &br_info); 3107 if (err == 0) { 3108 NL_SET_ERR_MSG_MOD(extack, 3109 "This VLAN is already configured by the bridge"); 3110 return notifier_from_errno(-EBUSY); 3111 } 3112 3113 return NOTIFY_DONE; 3114 } 3115 3116 static int 3117 dsa_user_prechangeupper_sanity_check(struct net_device *dev, 3118 struct netdev_notifier_changeupper_info *info) 3119 { 3120 struct dsa_switch *ds; 3121 struct dsa_port *dp; 3122 int err; 3123 3124 if (!dsa_user_dev_check(dev)) 3125 return dsa_prevent_bridging_8021q_upper(dev, info); 3126 3127 dp = dsa_user_to_port(dev); 3128 ds = dp->ds; 3129 3130 if (ds->ops->port_prechangeupper) { 3131 err = ds->ops->port_prechangeupper(ds, dp->index, info); 3132 if (err) 3133 return notifier_from_errno(err); 3134 } 3135 3136 if (is_vlan_dev(info->upper_dev)) 3137 return dsa_user_check_8021q_upper(dev, info); 3138 3139 return NOTIFY_DONE; 3140 } 3141 3142 /* To be eligible as a DSA conduit, a LAG must have all lower interfaces be 3143 * eligible DSA conduits. Additionally, all LAG slaves must be DSA conduits of 3144 * switches in the same switch tree. 3145 */ 3146 static int dsa_lag_conduit_validate(struct net_device *lag_dev, 3147 struct netlink_ext_ack *extack) 3148 { 3149 struct net_device *lower1, *lower2; 3150 struct list_head *iter1, *iter2; 3151 3152 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 3153 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 3154 if (!netdev_uses_dsa(lower1) || 3155 !netdev_uses_dsa(lower2)) { 3156 NL_SET_ERR_MSG_MOD(extack, 3157 "All LAG ports must be eligible as DSA conduits"); 3158 return notifier_from_errno(-EINVAL); 3159 } 3160 3161 if (lower1 == lower2) 3162 continue; 3163 3164 if (!dsa_port_tree_same(lower1->dsa_ptr, 3165 lower2->dsa_ptr)) { 3166 NL_SET_ERR_MSG_MOD(extack, 3167 "LAG contains DSA conduits of disjoint switch trees"); 3168 return notifier_from_errno(-EINVAL); 3169 } 3170 } 3171 } 3172 3173 return NOTIFY_DONE; 3174 } 3175 3176 static int 3177 dsa_conduit_prechangeupper_sanity_check(struct net_device *conduit, 3178 struct netdev_notifier_changeupper_info *info) 3179 { 3180 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3181 3182 if (!netdev_uses_dsa(conduit)) 3183 return NOTIFY_DONE; 3184 3185 if (!info->linking) 3186 return NOTIFY_DONE; 3187 3188 /* Allow DSA switch uppers */ 3189 if (dsa_user_dev_check(info->upper_dev)) 3190 return NOTIFY_DONE; 3191 3192 /* Allow bridge uppers of DSA conduits, subject to further 3193 * restrictions in dsa_bridge_prechangelower_sanity_check() 3194 */ 3195 if (netif_is_bridge_master(info->upper_dev)) 3196 return NOTIFY_DONE; 3197 3198 /* Allow LAG uppers, subject to further restrictions in 3199 * dsa_lag_conduit_prechangelower_sanity_check() 3200 */ 3201 if (netif_is_lag_master(info->upper_dev)) 3202 return dsa_lag_conduit_validate(info->upper_dev, extack); 3203 3204 NL_SET_ERR_MSG_MOD(extack, 3205 "DSA conduit cannot join unknown upper interfaces"); 3206 return notifier_from_errno(-EBUSY); 3207 } 3208 3209 static int 3210 dsa_lag_conduit_prechangelower_sanity_check(struct net_device *dev, 3211 struct netdev_notifier_changeupper_info *info) 3212 { 3213 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3214 struct net_device *lag_dev = info->upper_dev; 3215 struct net_device *lower; 3216 struct list_head *iter; 3217 3218 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 3219 return NOTIFY_DONE; 3220 3221 if (!info->linking) 3222 return NOTIFY_DONE; 3223 3224 if (!netdev_uses_dsa(dev)) { 3225 NL_SET_ERR_MSG(extack, 3226 "Only DSA conduits can join a LAG DSA conduit"); 3227 return notifier_from_errno(-EINVAL); 3228 } 3229 3230 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3231 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 3232 NL_SET_ERR_MSG(extack, 3233 "Interface is DSA conduit for a different switch tree than this LAG"); 3234 return notifier_from_errno(-EINVAL); 3235 } 3236 3237 break; 3238 } 3239 3240 return NOTIFY_DONE; 3241 } 3242 3243 /* Don't allow bridging of DSA conduits, since the bridge layer rx_handler 3244 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 3245 * chance to strip off and parse the DSA switch tag protocol header (the bridge 3246 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 3247 * frames). 3248 * The only case where that would not be an issue is when bridging can already 3249 * be offloaded, such as when the DSA conduit is itself a DSA or plain switchdev 3250 * port, and is bridged only with other ports from the same hardware device. 3251 */ 3252 static int 3253 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 3254 struct netdev_notifier_changeupper_info *info) 3255 { 3256 struct net_device *br = info->upper_dev; 3257 struct netlink_ext_ack *extack; 3258 struct net_device *lower; 3259 struct list_head *iter; 3260 3261 if (!netif_is_bridge_master(br)) 3262 return NOTIFY_DONE; 3263 3264 if (!info->linking) 3265 return NOTIFY_DONE; 3266 3267 extack = netdev_notifier_info_to_extack(&info->info); 3268 3269 netdev_for_each_lower_dev(br, lower, iter) { 3270 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 3271 continue; 3272 3273 if (!netdev_port_same_parent_id(lower, new_lower)) { 3274 NL_SET_ERR_MSG(extack, 3275 "Cannot do software bridging with a DSA conduit"); 3276 return notifier_from_errno(-EINVAL); 3277 } 3278 } 3279 3280 return NOTIFY_DONE; 3281 } 3282 3283 static void dsa_tree_migrate_ports_from_lag_conduit(struct dsa_switch_tree *dst, 3284 struct net_device *lag_dev) 3285 { 3286 struct net_device *new_conduit = dsa_tree_find_first_conduit(dst); 3287 struct dsa_port *dp; 3288 int err; 3289 3290 dsa_tree_for_each_user_port(dp, dst) { 3291 if (dsa_port_to_conduit(dp) != lag_dev) 3292 continue; 3293 3294 err = dsa_user_change_conduit(dp->user, new_conduit, NULL); 3295 if (err) { 3296 netdev_err(dp->user, 3297 "failed to restore conduit to %s: %pe\n", 3298 new_conduit->name, ERR_PTR(err)); 3299 } 3300 } 3301 } 3302 3303 static int dsa_conduit_lag_join(struct net_device *conduit, 3304 struct net_device *lag_dev, 3305 struct netdev_lag_upper_info *uinfo, 3306 struct netlink_ext_ack *extack) 3307 { 3308 struct dsa_port *cpu_dp = conduit->dsa_ptr; 3309 struct dsa_switch_tree *dst = cpu_dp->dst; 3310 struct dsa_port *dp; 3311 int err; 3312 3313 err = dsa_conduit_lag_setup(lag_dev, cpu_dp, uinfo, extack); 3314 if (err) 3315 return err; 3316 3317 dsa_tree_for_each_user_port(dp, dst) { 3318 if (dsa_port_to_conduit(dp) != conduit) 3319 continue; 3320 3321 err = dsa_user_change_conduit(dp->user, lag_dev, extack); 3322 if (err) 3323 goto restore; 3324 } 3325 3326 return 0; 3327 3328 restore: 3329 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3330 if (dsa_port_to_conduit(dp) != lag_dev) 3331 continue; 3332 3333 err = dsa_user_change_conduit(dp->user, conduit, NULL); 3334 if (err) { 3335 netdev_err(dp->user, 3336 "failed to restore conduit to %s: %pe\n", 3337 conduit->name, ERR_PTR(err)); 3338 } 3339 } 3340 3341 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3342 3343 return err; 3344 } 3345 3346 static void dsa_conduit_lag_leave(struct net_device *conduit, 3347 struct net_device *lag_dev) 3348 { 3349 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3350 struct dsa_switch_tree *dst = cpu_dp->dst; 3351 struct dsa_port *new_cpu_dp = NULL; 3352 struct net_device *lower; 3353 struct list_head *iter; 3354 3355 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3356 if (netdev_uses_dsa(lower)) { 3357 new_cpu_dp = lower->dsa_ptr; 3358 break; 3359 } 3360 } 3361 3362 if (new_cpu_dp) { 3363 /* Update the CPU port of the user ports still under the LAG 3364 * so that dsa_port_to_conduit() continues to work properly 3365 */ 3366 dsa_tree_for_each_user_port(dp, dst) 3367 if (dsa_port_to_conduit(dp) == lag_dev) 3368 dp->cpu_dp = new_cpu_dp; 3369 3370 /* Update the index of the virtual CPU port to match the lowest 3371 * physical CPU port 3372 */ 3373 lag_dev->dsa_ptr = new_cpu_dp; 3374 wmb(); 3375 } else { 3376 /* If the LAG DSA conduit has no ports left, migrate back all 3377 * user ports to the first physical CPU port 3378 */ 3379 dsa_tree_migrate_ports_from_lag_conduit(dst, lag_dev); 3380 } 3381 3382 /* This DSA conduit has left its LAG in any case, so let 3383 * the CPU port leave the hardware LAG as well 3384 */ 3385 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3386 } 3387 3388 static int dsa_conduit_changeupper(struct net_device *dev, 3389 struct netdev_notifier_changeupper_info *info) 3390 { 3391 struct netlink_ext_ack *extack; 3392 int err = NOTIFY_DONE; 3393 3394 if (!netdev_uses_dsa(dev)) 3395 return err; 3396 3397 extack = netdev_notifier_info_to_extack(&info->info); 3398 3399 if (netif_is_lag_master(info->upper_dev)) { 3400 if (info->linking) { 3401 err = dsa_conduit_lag_join(dev, info->upper_dev, 3402 info->upper_info, extack); 3403 err = notifier_from_errno(err); 3404 } else { 3405 dsa_conduit_lag_leave(dev, info->upper_dev); 3406 err = NOTIFY_OK; 3407 } 3408 } 3409 3410 return err; 3411 } 3412 3413 static int dsa_user_netdevice_event(struct notifier_block *nb, 3414 unsigned long event, void *ptr) 3415 { 3416 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3417 3418 switch (event) { 3419 case NETDEV_PRECHANGEUPPER: { 3420 struct netdev_notifier_changeupper_info *info = ptr; 3421 int err; 3422 3423 err = dsa_user_prechangeupper_sanity_check(dev, info); 3424 if (notifier_to_errno(err)) 3425 return err; 3426 3427 err = dsa_conduit_prechangeupper_sanity_check(dev, info); 3428 if (notifier_to_errno(err)) 3429 return err; 3430 3431 err = dsa_lag_conduit_prechangelower_sanity_check(dev, info); 3432 if (notifier_to_errno(err)) 3433 return err; 3434 3435 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3436 if (notifier_to_errno(err)) 3437 return err; 3438 3439 err = dsa_user_prechangeupper(dev, ptr); 3440 if (notifier_to_errno(err)) 3441 return err; 3442 3443 err = dsa_user_lag_prechangeupper(dev, ptr); 3444 if (notifier_to_errno(err)) 3445 return err; 3446 3447 break; 3448 } 3449 case NETDEV_CHANGEUPPER: { 3450 int err; 3451 3452 err = dsa_user_changeupper(dev, ptr); 3453 if (notifier_to_errno(err)) 3454 return err; 3455 3456 err = dsa_user_lag_changeupper(dev, ptr); 3457 if (notifier_to_errno(err)) 3458 return err; 3459 3460 err = dsa_conduit_changeupper(dev, ptr); 3461 if (notifier_to_errno(err)) 3462 return err; 3463 3464 break; 3465 } 3466 case NETDEV_CHANGELOWERSTATE: { 3467 struct netdev_notifier_changelowerstate_info *info = ptr; 3468 struct dsa_port *dp; 3469 int err = 0; 3470 3471 if (dsa_user_dev_check(dev)) { 3472 dp = dsa_user_to_port(dev); 3473 3474 err = dsa_port_lag_change(dp, info->lower_state_info); 3475 } 3476 3477 /* Mirror LAG port events on DSA conduits that are in 3478 * a LAG towards their respective switch CPU ports 3479 */ 3480 if (netdev_uses_dsa(dev)) { 3481 dp = dev->dsa_ptr; 3482 3483 err = dsa_port_lag_change(dp, info->lower_state_info); 3484 } 3485 3486 return notifier_from_errno(err); 3487 } 3488 case NETDEV_CHANGE: 3489 case NETDEV_UP: { 3490 /* Track state of conduit port. 3491 * DSA driver may require the conduit port (and indirectly 3492 * the tagger) to be available for some special operation. 3493 */ 3494 if (netdev_uses_dsa(dev)) { 3495 struct dsa_port *cpu_dp = dev->dsa_ptr; 3496 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3497 3498 /* Track when the conduit port is UP */ 3499 dsa_tree_conduit_oper_state_change(dst, dev, 3500 netif_oper_up(dev)); 3501 3502 /* Track when the conduit port is ready and can accept 3503 * packet. 3504 * NETDEV_UP event is not enough to flag a port as ready. 3505 * We also have to wait for linkwatch_do_dev to dev_activate 3506 * and emit a NETDEV_CHANGE event. 3507 * We check if a conduit port is ready by checking if the dev 3508 * have a qdisc assigned and is not noop. 3509 */ 3510 dsa_tree_conduit_admin_state_change(dst, dev, 3511 !qdisc_tx_is_noop(dev)); 3512 3513 return NOTIFY_OK; 3514 } 3515 3516 return NOTIFY_DONE; 3517 } 3518 case NETDEV_GOING_DOWN: { 3519 struct dsa_port *dp, *cpu_dp; 3520 struct dsa_switch_tree *dst; 3521 LIST_HEAD(close_list); 3522 3523 if (!netdev_uses_dsa(dev)) 3524 return NOTIFY_DONE; 3525 3526 cpu_dp = dev->dsa_ptr; 3527 dst = cpu_dp->ds->dst; 3528 3529 dsa_tree_conduit_admin_state_change(dst, dev, false); 3530 3531 list_for_each_entry(dp, &dst->ports, list) { 3532 if (!dsa_port_is_user(dp)) 3533 continue; 3534 3535 if (dp->cpu_dp != cpu_dp) 3536 continue; 3537 3538 list_add(&dp->user->close_list, &close_list); 3539 } 3540 3541 dev_close_many(&close_list, true); 3542 3543 return NOTIFY_OK; 3544 } 3545 default: 3546 break; 3547 } 3548 3549 return NOTIFY_DONE; 3550 } 3551 3552 static void 3553 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3554 { 3555 struct switchdev_notifier_fdb_info info = {}; 3556 3557 info.addr = switchdev_work->addr; 3558 info.vid = switchdev_work->vid; 3559 info.offloaded = true; 3560 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3561 switchdev_work->orig_dev, &info.info, NULL); 3562 } 3563 3564 static void dsa_user_switchdev_event_work(struct work_struct *work) 3565 { 3566 struct dsa_switchdev_event_work *switchdev_work = 3567 container_of(work, struct dsa_switchdev_event_work, work); 3568 const unsigned char *addr = switchdev_work->addr; 3569 struct net_device *dev = switchdev_work->dev; 3570 u16 vid = switchdev_work->vid; 3571 struct dsa_switch *ds; 3572 struct dsa_port *dp; 3573 int err; 3574 3575 dp = dsa_user_to_port(dev); 3576 ds = dp->ds; 3577 3578 switch (switchdev_work->event) { 3579 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3580 if (switchdev_work->host_addr) 3581 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3582 else if (dp->lag) 3583 err = dsa_port_lag_fdb_add(dp, addr, vid); 3584 else 3585 err = dsa_port_fdb_add(dp, addr, vid); 3586 if (err) { 3587 dev_err(ds->dev, 3588 "port %d failed to add %pM vid %d to fdb: %d\n", 3589 dp->index, addr, vid, err); 3590 break; 3591 } 3592 dsa_fdb_offload_notify(switchdev_work); 3593 break; 3594 3595 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3596 if (switchdev_work->host_addr) 3597 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3598 else if (dp->lag) 3599 err = dsa_port_lag_fdb_del(dp, addr, vid); 3600 else 3601 err = dsa_port_fdb_del(dp, addr, vid); 3602 if (err) { 3603 dev_err(ds->dev, 3604 "port %d failed to delete %pM vid %d from fdb: %d\n", 3605 dp->index, addr, vid, err); 3606 } 3607 3608 break; 3609 } 3610 3611 kfree(switchdev_work); 3612 } 3613 3614 static bool dsa_foreign_dev_check(const struct net_device *dev, 3615 const struct net_device *foreign_dev) 3616 { 3617 const struct dsa_port *dp = dsa_user_to_port(dev); 3618 struct dsa_switch_tree *dst = dp->ds->dst; 3619 3620 if (netif_is_bridge_master(foreign_dev)) 3621 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3622 3623 if (netif_is_bridge_port(foreign_dev)) 3624 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3625 3626 /* Everything else is foreign */ 3627 return true; 3628 } 3629 3630 static int dsa_user_fdb_event(struct net_device *dev, 3631 struct net_device *orig_dev, 3632 unsigned long event, const void *ctx, 3633 const struct switchdev_notifier_fdb_info *fdb_info) 3634 { 3635 struct dsa_switchdev_event_work *switchdev_work; 3636 struct dsa_port *dp = dsa_user_to_port(dev); 3637 bool host_addr = fdb_info->is_local; 3638 struct dsa_switch *ds = dp->ds; 3639 3640 if (ctx && ctx != dp) 3641 return 0; 3642 3643 if (!dp->bridge) 3644 return 0; 3645 3646 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3647 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3648 return 0; 3649 3650 /* FDB entries learned by the software bridge or by foreign 3651 * bridge ports should be installed as host addresses only if 3652 * the driver requests assisted learning. 3653 */ 3654 if (!ds->assisted_learning_on_cpu_port) 3655 return 0; 3656 } 3657 3658 /* Also treat FDB entries on foreign interfaces bridged with us as host 3659 * addresses. 3660 */ 3661 if (dsa_foreign_dev_check(dev, orig_dev)) 3662 host_addr = true; 3663 3664 /* Check early that we're not doing work in vain. 3665 * Host addresses on LAG ports still require regular FDB ops, 3666 * since the CPU port isn't in a LAG. 3667 */ 3668 if (dp->lag && !host_addr) { 3669 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3670 return -EOPNOTSUPP; 3671 } else { 3672 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3673 return -EOPNOTSUPP; 3674 } 3675 3676 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3677 if (!switchdev_work) 3678 return -ENOMEM; 3679 3680 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3681 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3682 orig_dev->name, fdb_info->addr, fdb_info->vid, 3683 host_addr ? " as host address" : ""); 3684 3685 INIT_WORK(&switchdev_work->work, dsa_user_switchdev_event_work); 3686 switchdev_work->event = event; 3687 switchdev_work->dev = dev; 3688 switchdev_work->orig_dev = orig_dev; 3689 3690 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3691 switchdev_work->vid = fdb_info->vid; 3692 switchdev_work->host_addr = host_addr; 3693 3694 dsa_schedule_work(&switchdev_work->work); 3695 3696 return 0; 3697 } 3698 3699 /* Called under rcu_read_lock() */ 3700 static int dsa_user_switchdev_event(struct notifier_block *unused, 3701 unsigned long event, void *ptr) 3702 { 3703 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3704 int err; 3705 3706 switch (event) { 3707 case SWITCHDEV_PORT_ATTR_SET: 3708 err = switchdev_handle_port_attr_set(dev, ptr, 3709 dsa_user_dev_check, 3710 dsa_user_port_attr_set); 3711 return notifier_from_errno(err); 3712 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3713 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3714 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3715 dsa_user_dev_check, 3716 dsa_foreign_dev_check, 3717 dsa_user_fdb_event); 3718 return notifier_from_errno(err); 3719 default: 3720 return NOTIFY_DONE; 3721 } 3722 3723 return NOTIFY_OK; 3724 } 3725 3726 static int dsa_user_switchdev_blocking_event(struct notifier_block *unused, 3727 unsigned long event, void *ptr) 3728 { 3729 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3730 int err; 3731 3732 switch (event) { 3733 case SWITCHDEV_PORT_OBJ_ADD: 3734 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3735 dsa_user_dev_check, 3736 dsa_foreign_dev_check, 3737 dsa_user_port_obj_add); 3738 return notifier_from_errno(err); 3739 case SWITCHDEV_PORT_OBJ_DEL: 3740 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3741 dsa_user_dev_check, 3742 dsa_foreign_dev_check, 3743 dsa_user_port_obj_del); 3744 return notifier_from_errno(err); 3745 case SWITCHDEV_PORT_ATTR_SET: 3746 err = switchdev_handle_port_attr_set(dev, ptr, 3747 dsa_user_dev_check, 3748 dsa_user_port_attr_set); 3749 return notifier_from_errno(err); 3750 } 3751 3752 return NOTIFY_DONE; 3753 } 3754 3755 static struct notifier_block dsa_user_nb __read_mostly = { 3756 .notifier_call = dsa_user_netdevice_event, 3757 }; 3758 3759 struct notifier_block dsa_user_switchdev_notifier = { 3760 .notifier_call = dsa_user_switchdev_event, 3761 }; 3762 3763 struct notifier_block dsa_user_switchdev_blocking_notifier = { 3764 .notifier_call = dsa_user_switchdev_blocking_event, 3765 }; 3766 3767 int dsa_user_register_notifier(void) 3768 { 3769 struct notifier_block *nb; 3770 int err; 3771 3772 err = register_netdevice_notifier(&dsa_user_nb); 3773 if (err) 3774 return err; 3775 3776 err = register_switchdev_notifier(&dsa_user_switchdev_notifier); 3777 if (err) 3778 goto err_switchdev_nb; 3779 3780 nb = &dsa_user_switchdev_blocking_notifier; 3781 err = register_switchdev_blocking_notifier(nb); 3782 if (err) 3783 goto err_switchdev_blocking_nb; 3784 3785 return 0; 3786 3787 err_switchdev_blocking_nb: 3788 unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3789 err_switchdev_nb: 3790 unregister_netdevice_notifier(&dsa_user_nb); 3791 return err; 3792 } 3793 3794 void dsa_user_unregister_notifier(void) 3795 { 3796 struct notifier_block *nb; 3797 int err; 3798 3799 nb = &dsa_user_switchdev_blocking_notifier; 3800 err = unregister_switchdev_blocking_notifier(nb); 3801 if (err) 3802 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3803 3804 err = unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3805 if (err) 3806 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3807 3808 err = unregister_netdevice_notifier(&dsa_user_nb); 3809 if (err) 3810 pr_err("DSA: failed to unregister user notifier (%d)\n", err); 3811 } 3812