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 struct netpoll_info *ni) 1313 { 1314 struct net_device *conduit = dsa_user_to_conduit(dev); 1315 struct dsa_user_priv *p = netdev_priv(dev); 1316 struct netpoll *netpoll; 1317 int err = 0; 1318 1319 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1320 if (!netpoll) 1321 return -ENOMEM; 1322 1323 err = __netpoll_setup(netpoll, conduit); 1324 if (err) { 1325 kfree(netpoll); 1326 goto out; 1327 } 1328 1329 p->netpoll = netpoll; 1330 out: 1331 return err; 1332 } 1333 1334 static void dsa_user_netpoll_cleanup(struct net_device *dev) 1335 { 1336 struct dsa_user_priv *p = netdev_priv(dev); 1337 struct netpoll *netpoll = p->netpoll; 1338 1339 if (!netpoll) 1340 return; 1341 1342 p->netpoll = NULL; 1343 1344 __netpoll_free(netpoll); 1345 } 1346 1347 static void dsa_user_poll_controller(struct net_device *dev) 1348 { 1349 } 1350 #endif 1351 1352 static struct dsa_mall_tc_entry * 1353 dsa_user_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1354 { 1355 struct dsa_user_priv *p = netdev_priv(dev); 1356 struct dsa_mall_tc_entry *mall_tc_entry; 1357 1358 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1359 if (mall_tc_entry->cookie == cookie) 1360 return mall_tc_entry; 1361 1362 return NULL; 1363 } 1364 1365 static int 1366 dsa_user_add_cls_matchall_mirred(struct net_device *dev, 1367 struct tc_cls_matchall_offload *cls, 1368 bool ingress) 1369 { 1370 struct netlink_ext_ack *extack = cls->common.extack; 1371 struct dsa_port *dp = dsa_user_to_port(dev); 1372 struct dsa_user_priv *p = netdev_priv(dev); 1373 struct dsa_mall_mirror_tc_entry *mirror; 1374 struct dsa_mall_tc_entry *mall_tc_entry; 1375 struct dsa_switch *ds = dp->ds; 1376 struct flow_action_entry *act; 1377 struct dsa_port *to_dp; 1378 int err; 1379 1380 if (!ds->ops->port_mirror_add) 1381 return -EOPNOTSUPP; 1382 1383 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1384 cls->common.extack)) 1385 return -EOPNOTSUPP; 1386 1387 act = &cls->rule->action.entries[0]; 1388 1389 if (!act->dev) 1390 return -EINVAL; 1391 1392 if (!dsa_user_dev_check(act->dev)) 1393 return -EOPNOTSUPP; 1394 1395 to_dp = dsa_user_to_port(act->dev); 1396 1397 if (dp->ds != to_dp->ds) { 1398 NL_SET_ERR_MSG_MOD(extack, 1399 "Cross-chip mirroring not implemented"); 1400 return -EOPNOTSUPP; 1401 } 1402 1403 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1404 if (!mall_tc_entry) 1405 return -ENOMEM; 1406 1407 mall_tc_entry->cookie = cls->cookie; 1408 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1409 mirror = &mall_tc_entry->mirror; 1410 mirror->to_local_port = to_dp->index; 1411 mirror->ingress = ingress; 1412 1413 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1414 if (err) { 1415 kfree(mall_tc_entry); 1416 return err; 1417 } 1418 1419 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1420 1421 return err; 1422 } 1423 1424 static int 1425 dsa_user_add_cls_matchall_police(struct net_device *dev, 1426 struct tc_cls_matchall_offload *cls, 1427 bool ingress) 1428 { 1429 struct netlink_ext_ack *extack = cls->common.extack; 1430 struct dsa_port *dp = dsa_user_to_port(dev); 1431 struct dsa_user_priv *p = netdev_priv(dev); 1432 struct dsa_mall_policer_tc_entry *policer; 1433 struct dsa_mall_tc_entry *mall_tc_entry; 1434 struct dsa_switch *ds = dp->ds; 1435 struct flow_action_entry *act; 1436 int err; 1437 1438 if (!ds->ops->port_policer_add) { 1439 NL_SET_ERR_MSG_MOD(extack, 1440 "Policing offload not implemented"); 1441 return -EOPNOTSUPP; 1442 } 1443 1444 if (!ingress) { 1445 NL_SET_ERR_MSG_MOD(extack, 1446 "Only supported on ingress qdisc"); 1447 return -EOPNOTSUPP; 1448 } 1449 1450 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1451 cls->common.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 int err = -EOPNOTSUPP; 1490 1491 if (cls->common.protocol == htons(ETH_P_ALL) && 1492 flow_offload_has_one_action(&cls->rule->action) && 1493 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1494 err = dsa_user_add_cls_matchall_mirred(dev, cls, ingress); 1495 else if (flow_offload_has_one_action(&cls->rule->action) && 1496 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1497 err = dsa_user_add_cls_matchall_police(dev, cls, ingress); 1498 1499 return err; 1500 } 1501 1502 static void dsa_user_del_cls_matchall(struct net_device *dev, 1503 struct tc_cls_matchall_offload *cls) 1504 { 1505 struct dsa_port *dp = dsa_user_to_port(dev); 1506 struct dsa_mall_tc_entry *mall_tc_entry; 1507 struct dsa_switch *ds = dp->ds; 1508 1509 mall_tc_entry = dsa_user_mall_tc_entry_find(dev, cls->cookie); 1510 if (!mall_tc_entry) 1511 return; 1512 1513 list_del(&mall_tc_entry->list); 1514 1515 switch (mall_tc_entry->type) { 1516 case DSA_PORT_MALL_MIRROR: 1517 if (ds->ops->port_mirror_del) 1518 ds->ops->port_mirror_del(ds, dp->index, 1519 &mall_tc_entry->mirror); 1520 break; 1521 case DSA_PORT_MALL_POLICER: 1522 if (ds->ops->port_policer_del) 1523 ds->ops->port_policer_del(ds, dp->index); 1524 break; 1525 default: 1526 WARN_ON(1); 1527 } 1528 1529 kfree(mall_tc_entry); 1530 } 1531 1532 static int dsa_user_setup_tc_cls_matchall(struct net_device *dev, 1533 struct tc_cls_matchall_offload *cls, 1534 bool ingress) 1535 { 1536 if (cls->common.chain_index) 1537 return -EOPNOTSUPP; 1538 1539 switch (cls->command) { 1540 case TC_CLSMATCHALL_REPLACE: 1541 return dsa_user_add_cls_matchall(dev, cls, ingress); 1542 case TC_CLSMATCHALL_DESTROY: 1543 dsa_user_del_cls_matchall(dev, cls); 1544 return 0; 1545 default: 1546 return -EOPNOTSUPP; 1547 } 1548 } 1549 1550 static int dsa_user_add_cls_flower(struct net_device *dev, 1551 struct flow_cls_offload *cls, 1552 bool ingress) 1553 { 1554 struct dsa_port *dp = dsa_user_to_port(dev); 1555 struct dsa_switch *ds = dp->ds; 1556 int port = dp->index; 1557 1558 if (!ds->ops->cls_flower_add) 1559 return -EOPNOTSUPP; 1560 1561 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1562 } 1563 1564 static int dsa_user_del_cls_flower(struct net_device *dev, 1565 struct flow_cls_offload *cls, 1566 bool ingress) 1567 { 1568 struct dsa_port *dp = dsa_user_to_port(dev); 1569 struct dsa_switch *ds = dp->ds; 1570 int port = dp->index; 1571 1572 if (!ds->ops->cls_flower_del) 1573 return -EOPNOTSUPP; 1574 1575 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1576 } 1577 1578 static int dsa_user_stats_cls_flower(struct net_device *dev, 1579 struct flow_cls_offload *cls, 1580 bool ingress) 1581 { 1582 struct dsa_port *dp = dsa_user_to_port(dev); 1583 struct dsa_switch *ds = dp->ds; 1584 int port = dp->index; 1585 1586 if (!ds->ops->cls_flower_stats) 1587 return -EOPNOTSUPP; 1588 1589 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1590 } 1591 1592 static int dsa_user_setup_tc_cls_flower(struct net_device *dev, 1593 struct flow_cls_offload *cls, 1594 bool ingress) 1595 { 1596 switch (cls->command) { 1597 case FLOW_CLS_REPLACE: 1598 return dsa_user_add_cls_flower(dev, cls, ingress); 1599 case FLOW_CLS_DESTROY: 1600 return dsa_user_del_cls_flower(dev, cls, ingress); 1601 case FLOW_CLS_STATS: 1602 return dsa_user_stats_cls_flower(dev, cls, ingress); 1603 default: 1604 return -EOPNOTSUPP; 1605 } 1606 } 1607 1608 static int dsa_user_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1609 void *cb_priv, bool ingress) 1610 { 1611 struct net_device *dev = cb_priv; 1612 1613 if (!tc_can_offload(dev)) 1614 return -EOPNOTSUPP; 1615 1616 switch (type) { 1617 case TC_SETUP_CLSMATCHALL: 1618 return dsa_user_setup_tc_cls_matchall(dev, type_data, ingress); 1619 case TC_SETUP_CLSFLOWER: 1620 return dsa_user_setup_tc_cls_flower(dev, type_data, ingress); 1621 default: 1622 return -EOPNOTSUPP; 1623 } 1624 } 1625 1626 static int dsa_user_setup_tc_block_cb_ig(enum tc_setup_type type, 1627 void *type_data, void *cb_priv) 1628 { 1629 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, true); 1630 } 1631 1632 static int dsa_user_setup_tc_block_cb_eg(enum tc_setup_type type, 1633 void *type_data, void *cb_priv) 1634 { 1635 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, false); 1636 } 1637 1638 static LIST_HEAD(dsa_user_block_cb_list); 1639 1640 static int dsa_user_setup_tc_block(struct net_device *dev, 1641 struct flow_block_offload *f) 1642 { 1643 struct flow_block_cb *block_cb; 1644 flow_setup_cb_t *cb; 1645 1646 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1647 cb = dsa_user_setup_tc_block_cb_ig; 1648 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1649 cb = dsa_user_setup_tc_block_cb_eg; 1650 else 1651 return -EOPNOTSUPP; 1652 1653 f->driver_block_list = &dsa_user_block_cb_list; 1654 1655 switch (f->command) { 1656 case FLOW_BLOCK_BIND: 1657 if (flow_block_cb_is_busy(cb, dev, &dsa_user_block_cb_list)) 1658 return -EBUSY; 1659 1660 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1661 if (IS_ERR(block_cb)) 1662 return PTR_ERR(block_cb); 1663 1664 flow_block_cb_add(block_cb, f); 1665 list_add_tail(&block_cb->driver_list, &dsa_user_block_cb_list); 1666 return 0; 1667 case FLOW_BLOCK_UNBIND: 1668 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1669 if (!block_cb) 1670 return -ENOENT; 1671 1672 flow_block_cb_remove(block_cb, f); 1673 list_del(&block_cb->driver_list); 1674 return 0; 1675 default: 1676 return -EOPNOTSUPP; 1677 } 1678 } 1679 1680 static int dsa_user_setup_ft_block(struct dsa_switch *ds, int port, 1681 void *type_data) 1682 { 1683 struct net_device *conduit = dsa_port_to_conduit(dsa_to_port(ds, port)); 1684 1685 if (!conduit->netdev_ops->ndo_setup_tc) 1686 return -EOPNOTSUPP; 1687 1688 return conduit->netdev_ops->ndo_setup_tc(conduit, TC_SETUP_FT, type_data); 1689 } 1690 1691 static int dsa_user_setup_tc(struct net_device *dev, enum tc_setup_type type, 1692 void *type_data) 1693 { 1694 struct dsa_port *dp = dsa_user_to_port(dev); 1695 struct dsa_switch *ds = dp->ds; 1696 1697 switch (type) { 1698 case TC_SETUP_BLOCK: 1699 return dsa_user_setup_tc_block(dev, type_data); 1700 case TC_SETUP_FT: 1701 return dsa_user_setup_ft_block(ds, dp->index, type_data); 1702 default: 1703 break; 1704 } 1705 1706 if (!ds->ops->port_setup_tc) 1707 return -EOPNOTSUPP; 1708 1709 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1710 } 1711 1712 static int dsa_user_get_rxnfc(struct net_device *dev, 1713 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1714 { 1715 struct dsa_port *dp = dsa_user_to_port(dev); 1716 struct dsa_switch *ds = dp->ds; 1717 1718 if (!ds->ops->get_rxnfc) 1719 return -EOPNOTSUPP; 1720 1721 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1722 } 1723 1724 static int dsa_user_set_rxnfc(struct net_device *dev, 1725 struct ethtool_rxnfc *nfc) 1726 { 1727 struct dsa_port *dp = dsa_user_to_port(dev); 1728 struct dsa_switch *ds = dp->ds; 1729 1730 if (!ds->ops->set_rxnfc) 1731 return -EOPNOTSUPP; 1732 1733 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1734 } 1735 1736 static int dsa_user_get_ts_info(struct net_device *dev, 1737 struct kernel_ethtool_ts_info *ts) 1738 { 1739 struct dsa_user_priv *p = netdev_priv(dev); 1740 struct dsa_switch *ds = p->dp->ds; 1741 1742 if (!ds->ops->get_ts_info) 1743 return -EOPNOTSUPP; 1744 1745 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1746 } 1747 1748 static int dsa_user_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1749 u16 vid) 1750 { 1751 struct dsa_port *dp = dsa_user_to_port(dev); 1752 struct switchdev_obj_port_vlan vlan = { 1753 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1754 .vid = vid, 1755 /* This API only allows programming tagged, non-PVID VIDs */ 1756 .flags = 0, 1757 }; 1758 struct netlink_ext_ack extack = {0}; 1759 struct dsa_switch *ds = dp->ds; 1760 struct netdev_hw_addr *ha; 1761 struct dsa_vlan *v; 1762 int ret; 1763 1764 /* User port... */ 1765 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1766 if (ret) { 1767 if (extack._msg) 1768 netdev_err(dev, "%s\n", extack._msg); 1769 return ret; 1770 } 1771 1772 /* And CPU port... */ 1773 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1774 if (ret) { 1775 if (extack._msg) 1776 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1777 extack._msg); 1778 return ret; 1779 } 1780 1781 if (!dsa_switch_supports_uc_filtering(ds) && 1782 !dsa_switch_supports_mc_filtering(ds)) 1783 return 0; 1784 1785 v = kzalloc(sizeof(*v), GFP_KERNEL); 1786 if (!v) { 1787 ret = -ENOMEM; 1788 goto rollback; 1789 } 1790 1791 netif_addr_lock_bh(dev); 1792 1793 v->vid = vid; 1794 list_add_tail(&v->list, &dp->user_vlans); 1795 1796 if (dsa_switch_supports_mc_filtering(ds)) { 1797 netdev_for_each_synced_mc_addr(ha, dev) { 1798 dsa_user_schedule_standalone_work(dev, DSA_MC_ADD, 1799 ha->addr, vid); 1800 } 1801 } 1802 1803 if (dsa_switch_supports_uc_filtering(ds)) { 1804 netdev_for_each_synced_uc_addr(ha, dev) { 1805 dsa_user_schedule_standalone_work(dev, DSA_UC_ADD, 1806 ha->addr, vid); 1807 } 1808 } 1809 1810 netif_addr_unlock_bh(dev); 1811 1812 dsa_flush_workqueue(); 1813 1814 return 0; 1815 1816 rollback: 1817 dsa_port_host_vlan_del(dp, &vlan); 1818 dsa_port_vlan_del(dp, &vlan); 1819 1820 return ret; 1821 } 1822 1823 static int dsa_user_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1824 u16 vid) 1825 { 1826 struct dsa_port *dp = dsa_user_to_port(dev); 1827 struct switchdev_obj_port_vlan vlan = { 1828 .vid = vid, 1829 /* This API only allows programming tagged, non-PVID VIDs */ 1830 .flags = 0, 1831 }; 1832 struct dsa_switch *ds = dp->ds; 1833 struct netdev_hw_addr *ha; 1834 struct dsa_vlan *v; 1835 int err; 1836 1837 err = dsa_port_vlan_del(dp, &vlan); 1838 if (err) 1839 return err; 1840 1841 err = dsa_port_host_vlan_del(dp, &vlan); 1842 if (err) 1843 return err; 1844 1845 if (!dsa_switch_supports_uc_filtering(ds) && 1846 !dsa_switch_supports_mc_filtering(ds)) 1847 return 0; 1848 1849 netif_addr_lock_bh(dev); 1850 1851 v = dsa_vlan_find(&dp->user_vlans, &vlan); 1852 if (!v) { 1853 netif_addr_unlock_bh(dev); 1854 return -ENOENT; 1855 } 1856 1857 list_del(&v->list); 1858 kfree(v); 1859 1860 if (dsa_switch_supports_mc_filtering(ds)) { 1861 netdev_for_each_synced_mc_addr(ha, dev) { 1862 dsa_user_schedule_standalone_work(dev, DSA_MC_DEL, 1863 ha->addr, vid); 1864 } 1865 } 1866 1867 if (dsa_switch_supports_uc_filtering(ds)) { 1868 netdev_for_each_synced_uc_addr(ha, dev) { 1869 dsa_user_schedule_standalone_work(dev, DSA_UC_DEL, 1870 ha->addr, vid); 1871 } 1872 } 1873 1874 netif_addr_unlock_bh(dev); 1875 1876 dsa_flush_workqueue(); 1877 1878 return 0; 1879 } 1880 1881 static int dsa_user_restore_vlan(struct net_device *vdev, int vid, void *arg) 1882 { 1883 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1884 1885 return dsa_user_vlan_rx_add_vid(arg, proto, vid); 1886 } 1887 1888 static int dsa_user_clear_vlan(struct net_device *vdev, int vid, void *arg) 1889 { 1890 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1891 1892 return dsa_user_vlan_rx_kill_vid(arg, proto, vid); 1893 } 1894 1895 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1896 * filtering is enabled. The baseline is that only ports that offload a 1897 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1898 * but there are exceptions for quirky hardware. 1899 * 1900 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1901 * the same switch with other ports that offload a VLAN-aware bridge are also 1902 * inevitably VLAN-aware. 1903 * 1904 * To summarize, a DSA switch port offloads: 1905 * 1906 * - If standalone (this includes software bridge, software LAG): 1907 * - if ds->needs_standalone_vlan_filtering = true, OR if 1908 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1909 * this switch chip which have vlan_filtering=1) 1910 * - the 8021q upper VLANs 1911 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1912 * global, or it is, but no port is under a VLAN-aware bridge): 1913 * - no VLAN (any 8021q upper is a software VLAN) 1914 * 1915 * - If under a vlan_filtering=0 bridge which it offload: 1916 * - if ds->configure_vlan_while_not_filtering = true (default): 1917 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1918 * - else (deprecated): 1919 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1920 * enabled, so this behavior is broken and discouraged. 1921 * 1922 * - If under a vlan_filtering=1 bridge which it offload: 1923 * - the bridge VLANs 1924 * - the 8021q upper VLANs 1925 */ 1926 int dsa_user_manage_vlan_filtering(struct net_device *user, 1927 bool vlan_filtering) 1928 { 1929 int err; 1930 1931 if (vlan_filtering) { 1932 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1933 1934 err = vlan_for_each(user, dsa_user_restore_vlan, user); 1935 if (err) { 1936 vlan_for_each(user, dsa_user_clear_vlan, user); 1937 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1938 return err; 1939 } 1940 } else { 1941 err = vlan_for_each(user, dsa_user_clear_vlan, user); 1942 if (err) 1943 return err; 1944 1945 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1946 } 1947 1948 return 0; 1949 } 1950 1951 struct dsa_hw_port { 1952 struct list_head list; 1953 struct net_device *dev; 1954 int old_mtu; 1955 }; 1956 1957 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1958 { 1959 const struct dsa_hw_port *p; 1960 int err; 1961 1962 list_for_each_entry(p, hw_port_list, list) { 1963 if (p->dev->mtu == mtu) 1964 continue; 1965 1966 err = dev_set_mtu(p->dev, mtu); 1967 if (err) 1968 goto rollback; 1969 } 1970 1971 return 0; 1972 1973 rollback: 1974 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1975 if (p->dev->mtu == p->old_mtu) 1976 continue; 1977 1978 if (dev_set_mtu(p->dev, p->old_mtu)) 1979 netdev_err(p->dev, "Failed to restore MTU\n"); 1980 } 1981 1982 return err; 1983 } 1984 1985 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1986 { 1987 struct dsa_hw_port *p, *n; 1988 1989 list_for_each_entry_safe(p, n, hw_port_list, list) 1990 kfree(p); 1991 } 1992 1993 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1994 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1995 { 1996 struct list_head hw_port_list; 1997 struct dsa_switch_tree *dst; 1998 int min_mtu = ETH_MAX_MTU; 1999 struct dsa_port *other_dp; 2000 int err; 2001 2002 if (!dp->ds->mtu_enforcement_ingress) 2003 return; 2004 2005 if (!dp->bridge) 2006 return; 2007 2008 INIT_LIST_HEAD(&hw_port_list); 2009 2010 /* Populate the list of ports that are part of the same bridge 2011 * as the newly added/modified port 2012 */ 2013 list_for_each_entry(dst, &dsa_tree_list, list) { 2014 list_for_each_entry(other_dp, &dst->ports, list) { 2015 struct dsa_hw_port *hw_port; 2016 struct net_device *user; 2017 2018 if (other_dp->type != DSA_PORT_TYPE_USER) 2019 continue; 2020 2021 if (!dsa_port_bridge_same(dp, other_dp)) 2022 continue; 2023 2024 if (!other_dp->ds->mtu_enforcement_ingress) 2025 continue; 2026 2027 user = other_dp->user; 2028 2029 if (min_mtu > user->mtu) 2030 min_mtu = user->mtu; 2031 2032 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 2033 if (!hw_port) 2034 goto out; 2035 2036 hw_port->dev = user; 2037 hw_port->old_mtu = user->mtu; 2038 2039 list_add(&hw_port->list, &hw_port_list); 2040 } 2041 } 2042 2043 /* Attempt to configure the entire hardware bridge to the newly added 2044 * interface's MTU first, regardless of whether the intention of the 2045 * user was to raise or lower it. 2046 */ 2047 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->user->mtu); 2048 if (!err) 2049 goto out; 2050 2051 /* Clearly that didn't work out so well, so just set the minimum MTU on 2052 * all hardware bridge ports now. If this fails too, then all ports will 2053 * still have their old MTU rolled back anyway. 2054 */ 2055 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 2056 2057 out: 2058 dsa_hw_port_list_free(&hw_port_list); 2059 } 2060 2061 int dsa_user_change_mtu(struct net_device *dev, int new_mtu) 2062 { 2063 struct net_device *conduit = dsa_user_to_conduit(dev); 2064 struct dsa_port *dp = dsa_user_to_port(dev); 2065 struct dsa_port *cpu_dp = dp->cpu_dp; 2066 struct dsa_switch *ds = dp->ds; 2067 struct dsa_port *other_dp; 2068 int largest_mtu = 0; 2069 int new_conduit_mtu; 2070 int old_conduit_mtu; 2071 int mtu_limit; 2072 int overhead; 2073 int cpu_mtu; 2074 int err; 2075 2076 if (!ds->ops->port_change_mtu) 2077 return -EOPNOTSUPP; 2078 2079 dsa_tree_for_each_user_port(other_dp, ds->dst) { 2080 int user_mtu; 2081 2082 /* During probe, this function will be called for each user 2083 * device, while not all of them have been allocated. That's 2084 * ok, it doesn't change what the maximum is, so ignore it. 2085 */ 2086 if (!other_dp->user) 2087 continue; 2088 2089 /* Pretend that we already applied the setting, which we 2090 * actually haven't (still haven't done all integrity checks) 2091 */ 2092 if (dp == other_dp) 2093 user_mtu = new_mtu; 2094 else 2095 user_mtu = other_dp->user->mtu; 2096 2097 if (largest_mtu < user_mtu) 2098 largest_mtu = user_mtu; 2099 } 2100 2101 overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops); 2102 mtu_limit = min_t(int, conduit->max_mtu, dev->max_mtu + overhead); 2103 old_conduit_mtu = conduit->mtu; 2104 new_conduit_mtu = largest_mtu + overhead; 2105 if (new_conduit_mtu > mtu_limit) 2106 return -ERANGE; 2107 2108 /* If the conduit MTU isn't over limit, there's no need to check the CPU 2109 * MTU, since that surely isn't either. 2110 */ 2111 cpu_mtu = largest_mtu; 2112 2113 /* Start applying stuff */ 2114 if (new_conduit_mtu != old_conduit_mtu) { 2115 err = dev_set_mtu(conduit, new_conduit_mtu); 2116 if (err < 0) 2117 goto out_conduit_failed; 2118 2119 /* We only need to propagate the MTU of the CPU port to 2120 * upstream switches, so emit a notifier which updates them. 2121 */ 2122 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 2123 if (err) 2124 goto out_cpu_failed; 2125 } 2126 2127 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 2128 if (err) 2129 goto out_port_failed; 2130 2131 WRITE_ONCE(dev->mtu, new_mtu); 2132 2133 dsa_bridge_mtu_normalization(dp); 2134 2135 return 0; 2136 2137 out_port_failed: 2138 if (new_conduit_mtu != old_conduit_mtu) 2139 dsa_port_mtu_change(cpu_dp, old_conduit_mtu - overhead); 2140 out_cpu_failed: 2141 if (new_conduit_mtu != old_conduit_mtu) 2142 dev_set_mtu(conduit, old_conduit_mtu); 2143 out_conduit_failed: 2144 return err; 2145 } 2146 2147 static int __maybe_unused 2148 dsa_user_dcbnl_set_apptrust(struct net_device *dev, u8 *sel, int nsel) 2149 { 2150 struct dsa_port *dp = dsa_user_to_port(dev); 2151 struct dsa_switch *ds = dp->ds; 2152 int port = dp->index; 2153 2154 if (!ds->ops->port_set_apptrust) 2155 return -EOPNOTSUPP; 2156 2157 return ds->ops->port_set_apptrust(ds, port, sel, nsel); 2158 } 2159 2160 static int __maybe_unused 2161 dsa_user_dcbnl_get_apptrust(struct net_device *dev, u8 *sel, int *nsel) 2162 { 2163 struct dsa_port *dp = dsa_user_to_port(dev); 2164 struct dsa_switch *ds = dp->ds; 2165 int port = dp->index; 2166 2167 if (!ds->ops->port_get_apptrust) 2168 return -EOPNOTSUPP; 2169 2170 return ds->ops->port_get_apptrust(ds, port, sel, nsel); 2171 } 2172 2173 static int __maybe_unused 2174 dsa_user_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 2175 { 2176 struct dsa_port *dp = dsa_user_to_port(dev); 2177 struct dsa_switch *ds = dp->ds; 2178 unsigned long mask, new_prio; 2179 int err, port = dp->index; 2180 2181 if (!ds->ops->port_set_default_prio) 2182 return -EOPNOTSUPP; 2183 2184 err = dcb_ieee_setapp(dev, app); 2185 if (err) 2186 return err; 2187 2188 mask = dcb_ieee_getapp_mask(dev, app); 2189 new_prio = __fls(mask); 2190 2191 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2192 if (err) { 2193 dcb_ieee_delapp(dev, app); 2194 return err; 2195 } 2196 2197 return 0; 2198 } 2199 2200 /* Update the DSCP prio entries on all user ports of the switch in case 2201 * the switch supports global DSCP prio instead of per port DSCP prios. 2202 */ 2203 static int dsa_user_dcbnl_ieee_global_dscp_setdel(struct net_device *dev, 2204 struct dcb_app *app, bool del) 2205 { 2206 int (*setdel)(struct net_device *dev, struct dcb_app *app); 2207 struct dsa_port *dp = dsa_user_to_port(dev); 2208 struct dsa_switch *ds = dp->ds; 2209 struct dsa_port *other_dp; 2210 int err, restore_err; 2211 2212 if (del) 2213 setdel = dcb_ieee_delapp; 2214 else 2215 setdel = dcb_ieee_setapp; 2216 2217 dsa_switch_for_each_user_port(other_dp, ds) { 2218 struct net_device *user = other_dp->user; 2219 2220 if (!user || user == dev) 2221 continue; 2222 2223 err = setdel(user, app); 2224 if (err) 2225 goto err_try_to_restore; 2226 } 2227 2228 return 0; 2229 2230 err_try_to_restore: 2231 2232 /* Revert logic to restore previous state of app entries */ 2233 if (!del) 2234 setdel = dcb_ieee_delapp; 2235 else 2236 setdel = dcb_ieee_setapp; 2237 2238 dsa_switch_for_each_user_port_continue_reverse(other_dp, ds) { 2239 struct net_device *user = other_dp->user; 2240 2241 if (!user || user == dev) 2242 continue; 2243 2244 restore_err = setdel(user, app); 2245 if (restore_err) 2246 netdev_err(user, "Failed to restore DSCP prio entry configuration\n"); 2247 } 2248 2249 return err; 2250 } 2251 2252 static int __maybe_unused 2253 dsa_user_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 2254 { 2255 struct dsa_port *dp = dsa_user_to_port(dev); 2256 struct dsa_switch *ds = dp->ds; 2257 unsigned long mask, new_prio; 2258 int err, port = dp->index; 2259 u8 dscp = app->protocol; 2260 2261 if (!ds->ops->port_add_dscp_prio) 2262 return -EOPNOTSUPP; 2263 2264 if (dscp >= 64) { 2265 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 2266 dscp); 2267 return -EINVAL; 2268 } 2269 2270 err = dcb_ieee_setapp(dev, app); 2271 if (err) 2272 return err; 2273 2274 mask = dcb_ieee_getapp_mask(dev, app); 2275 new_prio = __fls(mask); 2276 2277 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 2278 if (err) { 2279 dcb_ieee_delapp(dev, app); 2280 return err; 2281 } 2282 2283 if (!ds->dscp_prio_mapping_is_global) 2284 return 0; 2285 2286 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, false); 2287 if (err) { 2288 if (ds->ops->port_del_dscp_prio) 2289 ds->ops->port_del_dscp_prio(ds, port, dscp, new_prio); 2290 dcb_ieee_delapp(dev, app); 2291 return err; 2292 } 2293 2294 return 0; 2295 } 2296 2297 static int __maybe_unused dsa_user_dcbnl_ieee_setapp(struct net_device *dev, 2298 struct dcb_app *app) 2299 { 2300 switch (app->selector) { 2301 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2302 switch (app->protocol) { 2303 case 0: 2304 return dsa_user_dcbnl_set_default_prio(dev, app); 2305 default: 2306 return -EOPNOTSUPP; 2307 } 2308 break; 2309 case IEEE_8021QAZ_APP_SEL_DSCP: 2310 return dsa_user_dcbnl_add_dscp_prio(dev, app); 2311 default: 2312 return -EOPNOTSUPP; 2313 } 2314 } 2315 2316 static int __maybe_unused 2317 dsa_user_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2318 { 2319 struct dsa_port *dp = dsa_user_to_port(dev); 2320 struct dsa_switch *ds = dp->ds; 2321 unsigned long mask, new_prio; 2322 int err, port = dp->index; 2323 2324 if (!ds->ops->port_set_default_prio) 2325 return -EOPNOTSUPP; 2326 2327 err = dcb_ieee_delapp(dev, app); 2328 if (err) 2329 return err; 2330 2331 mask = dcb_ieee_getapp_mask(dev, app); 2332 new_prio = mask ? __fls(mask) : 0; 2333 2334 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2335 if (err) { 2336 dcb_ieee_setapp(dev, app); 2337 return err; 2338 } 2339 2340 return 0; 2341 } 2342 2343 static int __maybe_unused 2344 dsa_user_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2345 { 2346 struct dsa_port *dp = dsa_user_to_port(dev); 2347 struct dsa_switch *ds = dp->ds; 2348 int err, port = dp->index; 2349 u8 dscp = app->protocol; 2350 2351 if (!ds->ops->port_del_dscp_prio) 2352 return -EOPNOTSUPP; 2353 2354 err = dcb_ieee_delapp(dev, app); 2355 if (err) 2356 return err; 2357 2358 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2359 if (err) { 2360 dcb_ieee_setapp(dev, app); 2361 return err; 2362 } 2363 2364 if (!ds->dscp_prio_mapping_is_global) 2365 return 0; 2366 2367 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, true); 2368 if (err) { 2369 if (ds->ops->port_add_dscp_prio) 2370 ds->ops->port_add_dscp_prio(ds, port, dscp, 2371 app->priority); 2372 dcb_ieee_setapp(dev, app); 2373 return err; 2374 } 2375 2376 return 0; 2377 } 2378 2379 static int __maybe_unused dsa_user_dcbnl_ieee_delapp(struct net_device *dev, 2380 struct dcb_app *app) 2381 { 2382 switch (app->selector) { 2383 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2384 switch (app->protocol) { 2385 case 0: 2386 return dsa_user_dcbnl_del_default_prio(dev, app); 2387 default: 2388 return -EOPNOTSUPP; 2389 } 2390 break; 2391 case IEEE_8021QAZ_APP_SEL_DSCP: 2392 return dsa_user_dcbnl_del_dscp_prio(dev, app); 2393 default: 2394 return -EOPNOTSUPP; 2395 } 2396 } 2397 2398 /* Pre-populate the DCB application priority table with the priorities 2399 * configured during switch setup, which we read from hardware here. 2400 */ 2401 static int dsa_user_dcbnl_init(struct net_device *dev) 2402 { 2403 struct dsa_port *dp = dsa_user_to_port(dev); 2404 struct dsa_switch *ds = dp->ds; 2405 int port = dp->index; 2406 int err; 2407 2408 if (ds->ops->port_get_default_prio) { 2409 int prio = ds->ops->port_get_default_prio(ds, port); 2410 struct dcb_app app = { 2411 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2412 .protocol = 0, 2413 .priority = prio, 2414 }; 2415 2416 if (prio < 0) 2417 return prio; 2418 2419 err = dcb_ieee_setapp(dev, &app); 2420 if (err) 2421 return err; 2422 } 2423 2424 if (ds->ops->port_get_dscp_prio) { 2425 int protocol; 2426 2427 for (protocol = 0; protocol < 64; protocol++) { 2428 struct dcb_app app = { 2429 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2430 .protocol = protocol, 2431 }; 2432 int prio; 2433 2434 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2435 if (prio == -EOPNOTSUPP) 2436 continue; 2437 if (prio < 0) 2438 return prio; 2439 2440 app.priority = prio; 2441 2442 err = dcb_ieee_setapp(dev, &app); 2443 if (err) 2444 return err; 2445 } 2446 } 2447 2448 return 0; 2449 } 2450 2451 static const struct ethtool_ops dsa_user_ethtool_ops = { 2452 .get_drvinfo = dsa_user_get_drvinfo, 2453 .get_regs_len = dsa_user_get_regs_len, 2454 .get_regs = dsa_user_get_regs, 2455 .nway_reset = dsa_user_nway_reset, 2456 .get_link = ethtool_op_get_link, 2457 .get_eeprom_len = dsa_user_get_eeprom_len, 2458 .get_eeprom = dsa_user_get_eeprom, 2459 .set_eeprom = dsa_user_set_eeprom, 2460 .get_strings = dsa_user_get_strings, 2461 .get_ethtool_stats = dsa_user_get_ethtool_stats, 2462 .get_sset_count = dsa_user_get_sset_count, 2463 .get_eth_phy_stats = dsa_user_get_eth_phy_stats, 2464 .get_eth_mac_stats = dsa_user_get_eth_mac_stats, 2465 .get_eth_ctrl_stats = dsa_user_get_eth_ctrl_stats, 2466 .get_rmon_stats = dsa_user_get_rmon_stats, 2467 .set_wol = dsa_user_set_wol, 2468 .get_wol = dsa_user_get_wol, 2469 .set_eee = dsa_user_set_eee, 2470 .get_eee = dsa_user_get_eee, 2471 .get_link_ksettings = dsa_user_get_link_ksettings, 2472 .set_link_ksettings = dsa_user_set_link_ksettings, 2473 .get_pause_stats = dsa_user_get_pause_stats, 2474 .get_pauseparam = dsa_user_get_pauseparam, 2475 .set_pauseparam = dsa_user_set_pauseparam, 2476 .get_rxnfc = dsa_user_get_rxnfc, 2477 .set_rxnfc = dsa_user_set_rxnfc, 2478 .get_ts_info = dsa_user_get_ts_info, 2479 .self_test = dsa_user_net_selftest, 2480 .get_mm = dsa_user_get_mm, 2481 .set_mm = dsa_user_set_mm, 2482 .get_mm_stats = dsa_user_get_mm_stats, 2483 }; 2484 2485 static const struct dcbnl_rtnl_ops __maybe_unused dsa_user_dcbnl_ops = { 2486 .ieee_setapp = dsa_user_dcbnl_ieee_setapp, 2487 .ieee_delapp = dsa_user_dcbnl_ieee_delapp, 2488 .dcbnl_setapptrust = dsa_user_dcbnl_set_apptrust, 2489 .dcbnl_getapptrust = dsa_user_dcbnl_get_apptrust, 2490 }; 2491 2492 static void dsa_user_get_stats64(struct net_device *dev, 2493 struct rtnl_link_stats64 *s) 2494 { 2495 struct dsa_port *dp = dsa_user_to_port(dev); 2496 struct dsa_switch *ds = dp->ds; 2497 2498 if (ds->ops->get_stats64) 2499 ds->ops->get_stats64(ds, dp->index, s); 2500 else 2501 dev_get_tstats64(dev, s); 2502 } 2503 2504 static int dsa_user_fill_forward_path(struct net_device_path_ctx *ctx, 2505 struct net_device_path *path) 2506 { 2507 struct dsa_port *dp = dsa_user_to_port(ctx->dev); 2508 struct net_device *conduit = dsa_port_to_conduit(dp); 2509 struct dsa_port *cpu_dp = dp->cpu_dp; 2510 2511 path->dev = ctx->dev; 2512 path->type = DEV_PATH_DSA; 2513 path->dsa.proto = cpu_dp->tag_ops->proto; 2514 path->dsa.port = dp->index; 2515 ctx->dev = conduit; 2516 2517 return 0; 2518 } 2519 2520 static const struct net_device_ops dsa_user_netdev_ops = { 2521 .ndo_open = dsa_user_open, 2522 .ndo_stop = dsa_user_close, 2523 .ndo_start_xmit = dsa_user_xmit, 2524 .ndo_change_rx_flags = dsa_user_change_rx_flags, 2525 .ndo_set_rx_mode = dsa_user_set_rx_mode, 2526 .ndo_set_mac_address = dsa_user_set_mac_address, 2527 .ndo_fdb_dump = dsa_user_fdb_dump, 2528 .ndo_eth_ioctl = dsa_user_ioctl, 2529 .ndo_get_iflink = dsa_user_get_iflink, 2530 #ifdef CONFIG_NET_POLL_CONTROLLER 2531 .ndo_netpoll_setup = dsa_user_netpoll_setup, 2532 .ndo_netpoll_cleanup = dsa_user_netpoll_cleanup, 2533 .ndo_poll_controller = dsa_user_poll_controller, 2534 #endif 2535 .ndo_setup_tc = dsa_user_setup_tc, 2536 .ndo_get_stats64 = dsa_user_get_stats64, 2537 .ndo_vlan_rx_add_vid = dsa_user_vlan_rx_add_vid, 2538 .ndo_vlan_rx_kill_vid = dsa_user_vlan_rx_kill_vid, 2539 .ndo_change_mtu = dsa_user_change_mtu, 2540 .ndo_fill_forward_path = dsa_user_fill_forward_path, 2541 }; 2542 2543 static const struct device_type dsa_type = { 2544 .name = "dsa", 2545 }; 2546 2547 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2548 { 2549 const struct dsa_port *dp = dsa_to_port(ds, port); 2550 2551 if (dp->pl) 2552 phylink_mac_change(dp->pl, up); 2553 } 2554 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2555 2556 static void dsa_user_phylink_fixed_state(struct phylink_config *config, 2557 struct phylink_link_state *state) 2558 { 2559 struct dsa_port *dp = dsa_phylink_to_port(config); 2560 struct dsa_switch *ds = dp->ds; 2561 2562 /* No need to check that this operation is valid, the callback would 2563 * not be called if it was not. 2564 */ 2565 ds->ops->phylink_fixed_state(ds, dp->index, state); 2566 } 2567 2568 /* user device setup *******************************************************/ 2569 static int dsa_user_phy_connect(struct net_device *user_dev, int addr, 2570 u32 flags) 2571 { 2572 struct dsa_port *dp = dsa_user_to_port(user_dev); 2573 struct dsa_switch *ds = dp->ds; 2574 2575 user_dev->phydev = mdiobus_get_phy(ds->user_mii_bus, addr); 2576 if (!user_dev->phydev) { 2577 netdev_err(user_dev, "no phy at %d\n", addr); 2578 return -ENODEV; 2579 } 2580 2581 user_dev->phydev->dev_flags |= flags; 2582 2583 return phylink_connect_phy(dp->pl, user_dev->phydev); 2584 } 2585 2586 static int dsa_user_phy_setup(struct net_device *user_dev) 2587 { 2588 struct dsa_port *dp = dsa_user_to_port(user_dev); 2589 struct device_node *port_dn = dp->dn; 2590 struct dsa_switch *ds = dp->ds; 2591 u32 phy_flags = 0; 2592 int ret; 2593 2594 dp->pl_config.dev = &user_dev->dev; 2595 dp->pl_config.type = PHYLINK_NETDEV; 2596 2597 /* The get_fixed_state callback takes precedence over polling the 2598 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2599 * this if the switch provides such a callback. 2600 */ 2601 if (ds->ops->phylink_fixed_state) { 2602 dp->pl_config.get_fixed_state = dsa_user_phylink_fixed_state; 2603 dp->pl_config.poll_fixed_state = true; 2604 } 2605 2606 ret = dsa_port_phylink_create(dp); 2607 if (ret) 2608 return ret; 2609 2610 if (ds->ops->get_phy_flags) 2611 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2612 2613 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2614 if (ret == -ENODEV && ds->user_mii_bus) { 2615 /* We could not connect to a designated PHY or SFP, so try to 2616 * use the switch internal MDIO bus instead 2617 */ 2618 ret = dsa_user_phy_connect(user_dev, dp->index, phy_flags); 2619 } 2620 if (ret) { 2621 netdev_err(user_dev, "failed to connect to PHY: %pe\n", 2622 ERR_PTR(ret)); 2623 dsa_port_phylink_destroy(dp); 2624 } 2625 2626 return ret; 2627 } 2628 2629 void dsa_user_setup_tagger(struct net_device *user) 2630 { 2631 struct dsa_port *dp = dsa_user_to_port(user); 2632 struct net_device *conduit = dsa_port_to_conduit(dp); 2633 struct dsa_user_priv *p = netdev_priv(user); 2634 const struct dsa_port *cpu_dp = dp->cpu_dp; 2635 const struct dsa_switch *ds = dp->ds; 2636 2637 user->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2638 user->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2639 /* Try to save one extra realloc later in the TX path (in the conduit) 2640 * by also inheriting the conduit's needed headroom and tailroom. 2641 * The 8021q driver also does this. 2642 */ 2643 user->needed_headroom += conduit->needed_headroom; 2644 user->needed_tailroom += conduit->needed_tailroom; 2645 2646 p->xmit = cpu_dp->tag_ops->xmit; 2647 2648 user->features = conduit->vlan_features | NETIF_F_HW_TC; 2649 user->hw_features |= NETIF_F_HW_TC; 2650 if (user->needed_tailroom) 2651 user->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2652 if (ds->needs_standalone_vlan_filtering) 2653 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2654 2655 user->lltx = true; 2656 } 2657 2658 int dsa_user_suspend(struct net_device *user_dev) 2659 { 2660 struct dsa_port *dp = dsa_user_to_port(user_dev); 2661 2662 if (!netif_running(user_dev)) 2663 return 0; 2664 2665 netif_device_detach(user_dev); 2666 2667 rtnl_lock(); 2668 phylink_stop(dp->pl); 2669 rtnl_unlock(); 2670 2671 return 0; 2672 } 2673 2674 int dsa_user_resume(struct net_device *user_dev) 2675 { 2676 struct dsa_port *dp = dsa_user_to_port(user_dev); 2677 2678 if (!netif_running(user_dev)) 2679 return 0; 2680 2681 netif_device_attach(user_dev); 2682 2683 rtnl_lock(); 2684 phylink_start(dp->pl); 2685 rtnl_unlock(); 2686 2687 return 0; 2688 } 2689 2690 int dsa_user_create(struct dsa_port *port) 2691 { 2692 struct net_device *conduit = dsa_port_to_conduit(port); 2693 struct dsa_switch *ds = port->ds; 2694 struct net_device *user_dev; 2695 struct dsa_user_priv *p; 2696 const char *name; 2697 int assign_type; 2698 int ret; 2699 2700 if (!ds->num_tx_queues) 2701 ds->num_tx_queues = 1; 2702 2703 if (port->name) { 2704 name = port->name; 2705 assign_type = NET_NAME_PREDICTABLE; 2706 } else { 2707 name = "eth%d"; 2708 assign_type = NET_NAME_ENUM; 2709 } 2710 2711 user_dev = alloc_netdev_mqs(sizeof(struct dsa_user_priv), name, 2712 assign_type, ether_setup, 2713 ds->num_tx_queues, 1); 2714 if (user_dev == NULL) 2715 return -ENOMEM; 2716 2717 user_dev->rtnl_link_ops = &dsa_link_ops; 2718 user_dev->ethtool_ops = &dsa_user_ethtool_ops; 2719 #if IS_ENABLED(CONFIG_DCB) 2720 user_dev->dcbnl_ops = &dsa_user_dcbnl_ops; 2721 #endif 2722 if (!is_zero_ether_addr(port->mac)) 2723 eth_hw_addr_set(user_dev, port->mac); 2724 else 2725 eth_hw_addr_inherit(user_dev, conduit); 2726 user_dev->priv_flags |= IFF_NO_QUEUE; 2727 if (dsa_switch_supports_uc_filtering(ds)) 2728 user_dev->priv_flags |= IFF_UNICAST_FLT; 2729 user_dev->netdev_ops = &dsa_user_netdev_ops; 2730 if (ds->ops->port_max_mtu) 2731 user_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2732 SET_NETDEV_DEVTYPE(user_dev, &dsa_type); 2733 2734 SET_NETDEV_DEV(user_dev, port->ds->dev); 2735 SET_NETDEV_DEVLINK_PORT(user_dev, &port->devlink_port); 2736 user_dev->dev.of_node = port->dn; 2737 user_dev->vlan_features = conduit->vlan_features; 2738 2739 p = netdev_priv(user_dev); 2740 user_dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2741 2742 ret = gro_cells_init(&p->gcells, user_dev); 2743 if (ret) 2744 goto out_free; 2745 2746 p->dp = port; 2747 INIT_LIST_HEAD(&p->mall_tc_list); 2748 port->user = user_dev; 2749 dsa_user_setup_tagger(user_dev); 2750 2751 netif_carrier_off(user_dev); 2752 2753 ret = dsa_user_phy_setup(user_dev); 2754 if (ret) { 2755 netdev_err(user_dev, 2756 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2757 ret, ds->dst->index, ds->index, port->index); 2758 goto out_gcells; 2759 } 2760 2761 rtnl_lock(); 2762 2763 ret = dsa_user_change_mtu(user_dev, ETH_DATA_LEN); 2764 if (ret && ret != -EOPNOTSUPP) 2765 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2766 ret, ETH_DATA_LEN, port->index); 2767 2768 ret = register_netdevice(user_dev); 2769 if (ret) { 2770 netdev_err(conduit, "error %d registering interface %s\n", 2771 ret, user_dev->name); 2772 rtnl_unlock(); 2773 goto out_phy; 2774 } 2775 2776 if (IS_ENABLED(CONFIG_DCB)) { 2777 ret = dsa_user_dcbnl_init(user_dev); 2778 if (ret) { 2779 netdev_err(user_dev, 2780 "failed to initialize DCB: %pe\n", 2781 ERR_PTR(ret)); 2782 rtnl_unlock(); 2783 goto out_unregister; 2784 } 2785 } 2786 2787 ret = netdev_upper_dev_link(conduit, user_dev, NULL); 2788 2789 rtnl_unlock(); 2790 2791 if (ret) 2792 goto out_unregister; 2793 2794 return 0; 2795 2796 out_unregister: 2797 unregister_netdev(user_dev); 2798 out_phy: 2799 rtnl_lock(); 2800 phylink_disconnect_phy(p->dp->pl); 2801 rtnl_unlock(); 2802 dsa_port_phylink_destroy(p->dp); 2803 out_gcells: 2804 gro_cells_destroy(&p->gcells); 2805 out_free: 2806 free_netdev(user_dev); 2807 port->user = NULL; 2808 return ret; 2809 } 2810 2811 void dsa_user_destroy(struct net_device *user_dev) 2812 { 2813 struct net_device *conduit = dsa_user_to_conduit(user_dev); 2814 struct dsa_port *dp = dsa_user_to_port(user_dev); 2815 struct dsa_user_priv *p = netdev_priv(user_dev); 2816 2817 netif_carrier_off(user_dev); 2818 rtnl_lock(); 2819 netdev_upper_dev_unlink(conduit, user_dev); 2820 unregister_netdevice(user_dev); 2821 phylink_disconnect_phy(dp->pl); 2822 rtnl_unlock(); 2823 2824 dsa_port_phylink_destroy(dp); 2825 gro_cells_destroy(&p->gcells); 2826 free_netdev(user_dev); 2827 } 2828 2829 int dsa_user_change_conduit(struct net_device *dev, struct net_device *conduit, 2830 struct netlink_ext_ack *extack) 2831 { 2832 struct net_device *old_conduit = dsa_user_to_conduit(dev); 2833 struct dsa_port *dp = dsa_user_to_port(dev); 2834 struct dsa_switch *ds = dp->ds; 2835 struct net_device *upper; 2836 struct list_head *iter; 2837 int err; 2838 2839 if (conduit == old_conduit) 2840 return 0; 2841 2842 if (!ds->ops->port_change_conduit) { 2843 NL_SET_ERR_MSG_MOD(extack, 2844 "Driver does not support changing DSA conduit"); 2845 return -EOPNOTSUPP; 2846 } 2847 2848 if (!netdev_uses_dsa(conduit)) { 2849 NL_SET_ERR_MSG_MOD(extack, 2850 "Interface not eligible as DSA conduit"); 2851 return -EOPNOTSUPP; 2852 } 2853 2854 netdev_for_each_upper_dev_rcu(conduit, upper, iter) { 2855 if (dsa_user_dev_check(upper)) 2856 continue; 2857 if (netif_is_bridge_master(upper)) 2858 continue; 2859 NL_SET_ERR_MSG_MOD(extack, "Cannot join conduit with unknown uppers"); 2860 return -EOPNOTSUPP; 2861 } 2862 2863 /* Since we allow live-changing the DSA conduit, plus we auto-open the 2864 * DSA conduit when the user port opens => we need to ensure that the 2865 * new DSA conduit is open too. 2866 */ 2867 if (dev->flags & IFF_UP) { 2868 err = dev_open(conduit, extack); 2869 if (err) 2870 return err; 2871 } 2872 2873 netdev_upper_dev_unlink(old_conduit, dev); 2874 2875 err = netdev_upper_dev_link(conduit, dev, extack); 2876 if (err) 2877 goto out_revert_old_conduit_unlink; 2878 2879 err = dsa_port_change_conduit(dp, conduit, extack); 2880 if (err) 2881 goto out_revert_conduit_link; 2882 2883 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2884 err = dsa_user_change_mtu(dev, dev->mtu); 2885 if (err && err != -EOPNOTSUPP) { 2886 netdev_warn(dev, 2887 "nonfatal error updating MTU with new conduit: %pe\n", 2888 ERR_PTR(err)); 2889 } 2890 2891 return 0; 2892 2893 out_revert_conduit_link: 2894 netdev_upper_dev_unlink(conduit, dev); 2895 out_revert_old_conduit_unlink: 2896 netdev_upper_dev_link(old_conduit, dev, NULL); 2897 return err; 2898 } 2899 2900 bool dsa_user_dev_check(const struct net_device *dev) 2901 { 2902 return dev->netdev_ops == &dsa_user_netdev_ops; 2903 } 2904 EXPORT_SYMBOL_GPL(dsa_user_dev_check); 2905 2906 static int dsa_user_changeupper(struct net_device *dev, 2907 struct netdev_notifier_changeupper_info *info) 2908 { 2909 struct netlink_ext_ack *extack; 2910 int err = NOTIFY_DONE; 2911 struct dsa_port *dp; 2912 2913 if (!dsa_user_dev_check(dev)) 2914 return err; 2915 2916 dp = dsa_user_to_port(dev); 2917 extack = netdev_notifier_info_to_extack(&info->info); 2918 2919 if (netif_is_bridge_master(info->upper_dev)) { 2920 if (info->linking) { 2921 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2922 if (!err) 2923 dsa_bridge_mtu_normalization(dp); 2924 if (err == -EOPNOTSUPP) { 2925 NL_SET_ERR_MSG_WEAK_MOD(extack, 2926 "Offloading not supported"); 2927 err = 0; 2928 } 2929 err = notifier_from_errno(err); 2930 } else { 2931 dsa_port_bridge_leave(dp, info->upper_dev); 2932 err = NOTIFY_OK; 2933 } 2934 } else if (netif_is_lag_master(info->upper_dev)) { 2935 if (info->linking) { 2936 err = dsa_port_lag_join(dp, info->upper_dev, 2937 info->upper_info, extack); 2938 if (err == -EOPNOTSUPP) { 2939 NL_SET_ERR_MSG_WEAK_MOD(extack, 2940 "Offloading not supported"); 2941 err = 0; 2942 } 2943 err = notifier_from_errno(err); 2944 } else { 2945 dsa_port_lag_leave(dp, info->upper_dev); 2946 err = NOTIFY_OK; 2947 } 2948 } else if (is_hsr_master(info->upper_dev)) { 2949 if (info->linking) { 2950 err = dsa_port_hsr_join(dp, info->upper_dev, extack); 2951 if (err == -EOPNOTSUPP) { 2952 NL_SET_ERR_MSG_WEAK_MOD(extack, 2953 "Offloading not supported"); 2954 err = 0; 2955 } 2956 err = notifier_from_errno(err); 2957 } else { 2958 dsa_port_hsr_leave(dp, info->upper_dev); 2959 err = NOTIFY_OK; 2960 } 2961 } 2962 2963 return err; 2964 } 2965 2966 static int dsa_user_prechangeupper(struct net_device *dev, 2967 struct netdev_notifier_changeupper_info *info) 2968 { 2969 struct dsa_port *dp; 2970 2971 if (!dsa_user_dev_check(dev)) 2972 return NOTIFY_DONE; 2973 2974 dp = dsa_user_to_port(dev); 2975 2976 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2977 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2978 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2979 dsa_port_pre_lag_leave(dp, info->upper_dev); 2980 /* dsa_port_pre_hsr_leave is not yet necessary since hsr devices cannot 2981 * meaningfully placed under a bridge yet 2982 */ 2983 2984 return NOTIFY_DONE; 2985 } 2986 2987 static int 2988 dsa_user_lag_changeupper(struct net_device *dev, 2989 struct netdev_notifier_changeupper_info *info) 2990 { 2991 struct net_device *lower; 2992 struct list_head *iter; 2993 int err = NOTIFY_DONE; 2994 struct dsa_port *dp; 2995 2996 if (!netif_is_lag_master(dev)) 2997 return err; 2998 2999 netdev_for_each_lower_dev(dev, lower, iter) { 3000 if (!dsa_user_dev_check(lower)) 3001 continue; 3002 3003 dp = dsa_user_to_port(lower); 3004 if (!dp->lag) 3005 /* Software LAG */ 3006 continue; 3007 3008 err = dsa_user_changeupper(lower, info); 3009 if (notifier_to_errno(err)) 3010 break; 3011 } 3012 3013 return err; 3014 } 3015 3016 /* Same as dsa_user_lag_changeupper() except that it calls 3017 * dsa_user_prechangeupper() 3018 */ 3019 static int 3020 dsa_user_lag_prechangeupper(struct net_device *dev, 3021 struct netdev_notifier_changeupper_info *info) 3022 { 3023 struct net_device *lower; 3024 struct list_head *iter; 3025 int err = NOTIFY_DONE; 3026 struct dsa_port *dp; 3027 3028 if (!netif_is_lag_master(dev)) 3029 return err; 3030 3031 netdev_for_each_lower_dev(dev, lower, iter) { 3032 if (!dsa_user_dev_check(lower)) 3033 continue; 3034 3035 dp = dsa_user_to_port(lower); 3036 if (!dp->lag) 3037 /* Software LAG */ 3038 continue; 3039 3040 err = dsa_user_prechangeupper(lower, info); 3041 if (notifier_to_errno(err)) 3042 break; 3043 } 3044 3045 return err; 3046 } 3047 3048 static int 3049 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 3050 struct netdev_notifier_changeupper_info *info) 3051 { 3052 struct netlink_ext_ack *ext_ack; 3053 struct net_device *user, *br; 3054 struct dsa_port *dp; 3055 3056 ext_ack = netdev_notifier_info_to_extack(&info->info); 3057 3058 if (!is_vlan_dev(dev)) 3059 return NOTIFY_DONE; 3060 3061 user = vlan_dev_real_dev(dev); 3062 if (!dsa_user_dev_check(user)) 3063 return NOTIFY_DONE; 3064 3065 dp = dsa_user_to_port(user); 3066 br = dsa_port_bridge_dev_get(dp); 3067 if (!br) 3068 return NOTIFY_DONE; 3069 3070 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 3071 if (br_vlan_enabled(br) && 3072 netif_is_bridge_master(info->upper_dev) && info->linking) { 3073 NL_SET_ERR_MSG_MOD(ext_ack, 3074 "Cannot make VLAN device join VLAN-aware bridge"); 3075 return notifier_from_errno(-EINVAL); 3076 } 3077 3078 return NOTIFY_DONE; 3079 } 3080 3081 static int 3082 dsa_user_check_8021q_upper(struct net_device *dev, 3083 struct netdev_notifier_changeupper_info *info) 3084 { 3085 struct dsa_port *dp = dsa_user_to_port(dev); 3086 struct net_device *br = dsa_port_bridge_dev_get(dp); 3087 struct bridge_vlan_info br_info; 3088 struct netlink_ext_ack *extack; 3089 int err = NOTIFY_DONE; 3090 u16 vid; 3091 3092 if (!br || !br_vlan_enabled(br)) 3093 return NOTIFY_DONE; 3094 3095 extack = netdev_notifier_info_to_extack(&info->info); 3096 vid = vlan_dev_vlan_id(info->upper_dev); 3097 3098 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 3099 * device, respectively the VID is not found, returning 3100 * 0 means success, which is a failure for us here. 3101 */ 3102 err = br_vlan_get_info(br, vid, &br_info); 3103 if (err == 0) { 3104 NL_SET_ERR_MSG_MOD(extack, 3105 "This VLAN is already configured by the bridge"); 3106 return notifier_from_errno(-EBUSY); 3107 } 3108 3109 return NOTIFY_DONE; 3110 } 3111 3112 static int 3113 dsa_user_prechangeupper_sanity_check(struct net_device *dev, 3114 struct netdev_notifier_changeupper_info *info) 3115 { 3116 struct dsa_switch *ds; 3117 struct dsa_port *dp; 3118 int err; 3119 3120 if (!dsa_user_dev_check(dev)) 3121 return dsa_prevent_bridging_8021q_upper(dev, info); 3122 3123 dp = dsa_user_to_port(dev); 3124 ds = dp->ds; 3125 3126 if (ds->ops->port_prechangeupper) { 3127 err = ds->ops->port_prechangeupper(ds, dp->index, info); 3128 if (err) 3129 return notifier_from_errno(err); 3130 } 3131 3132 if (is_vlan_dev(info->upper_dev)) 3133 return dsa_user_check_8021q_upper(dev, info); 3134 3135 return NOTIFY_DONE; 3136 } 3137 3138 /* To be eligible as a DSA conduit, a LAG must have all lower interfaces be 3139 * eligible DSA conduits. Additionally, all LAG slaves must be DSA conduits of 3140 * switches in the same switch tree. 3141 */ 3142 static int dsa_lag_conduit_validate(struct net_device *lag_dev, 3143 struct netlink_ext_ack *extack) 3144 { 3145 struct net_device *lower1, *lower2; 3146 struct list_head *iter1, *iter2; 3147 3148 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 3149 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 3150 if (!netdev_uses_dsa(lower1) || 3151 !netdev_uses_dsa(lower2)) { 3152 NL_SET_ERR_MSG_MOD(extack, 3153 "All LAG ports must be eligible as DSA conduits"); 3154 return notifier_from_errno(-EINVAL); 3155 } 3156 3157 if (lower1 == lower2) 3158 continue; 3159 3160 if (!dsa_port_tree_same(lower1->dsa_ptr, 3161 lower2->dsa_ptr)) { 3162 NL_SET_ERR_MSG_MOD(extack, 3163 "LAG contains DSA conduits of disjoint switch trees"); 3164 return notifier_from_errno(-EINVAL); 3165 } 3166 } 3167 } 3168 3169 return NOTIFY_DONE; 3170 } 3171 3172 static int 3173 dsa_conduit_prechangeupper_sanity_check(struct net_device *conduit, 3174 struct netdev_notifier_changeupper_info *info) 3175 { 3176 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3177 3178 if (!netdev_uses_dsa(conduit)) 3179 return NOTIFY_DONE; 3180 3181 if (!info->linking) 3182 return NOTIFY_DONE; 3183 3184 /* Allow DSA switch uppers */ 3185 if (dsa_user_dev_check(info->upper_dev)) 3186 return NOTIFY_DONE; 3187 3188 /* Allow bridge uppers of DSA conduits, subject to further 3189 * restrictions in dsa_bridge_prechangelower_sanity_check() 3190 */ 3191 if (netif_is_bridge_master(info->upper_dev)) 3192 return NOTIFY_DONE; 3193 3194 /* Allow LAG uppers, subject to further restrictions in 3195 * dsa_lag_conduit_prechangelower_sanity_check() 3196 */ 3197 if (netif_is_lag_master(info->upper_dev)) 3198 return dsa_lag_conduit_validate(info->upper_dev, extack); 3199 3200 NL_SET_ERR_MSG_MOD(extack, 3201 "DSA conduit cannot join unknown upper interfaces"); 3202 return notifier_from_errno(-EBUSY); 3203 } 3204 3205 static int 3206 dsa_lag_conduit_prechangelower_sanity_check(struct net_device *dev, 3207 struct netdev_notifier_changeupper_info *info) 3208 { 3209 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3210 struct net_device *lag_dev = info->upper_dev; 3211 struct net_device *lower; 3212 struct list_head *iter; 3213 3214 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 3215 return NOTIFY_DONE; 3216 3217 if (!info->linking) 3218 return NOTIFY_DONE; 3219 3220 if (!netdev_uses_dsa(dev)) { 3221 NL_SET_ERR_MSG(extack, 3222 "Only DSA conduits can join a LAG DSA conduit"); 3223 return notifier_from_errno(-EINVAL); 3224 } 3225 3226 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3227 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 3228 NL_SET_ERR_MSG(extack, 3229 "Interface is DSA conduit for a different switch tree than this LAG"); 3230 return notifier_from_errno(-EINVAL); 3231 } 3232 3233 break; 3234 } 3235 3236 return NOTIFY_DONE; 3237 } 3238 3239 /* Don't allow bridging of DSA conduits, since the bridge layer rx_handler 3240 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 3241 * chance to strip off and parse the DSA switch tag protocol header (the bridge 3242 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 3243 * frames). 3244 * The only case where that would not be an issue is when bridging can already 3245 * be offloaded, such as when the DSA conduit is itself a DSA or plain switchdev 3246 * port, and is bridged only with other ports from the same hardware device. 3247 */ 3248 static int 3249 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 3250 struct netdev_notifier_changeupper_info *info) 3251 { 3252 struct net_device *br = info->upper_dev; 3253 struct netlink_ext_ack *extack; 3254 struct net_device *lower; 3255 struct list_head *iter; 3256 3257 if (!netif_is_bridge_master(br)) 3258 return NOTIFY_DONE; 3259 3260 if (!info->linking) 3261 return NOTIFY_DONE; 3262 3263 extack = netdev_notifier_info_to_extack(&info->info); 3264 3265 netdev_for_each_lower_dev(br, lower, iter) { 3266 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 3267 continue; 3268 3269 if (!netdev_port_same_parent_id(lower, new_lower)) { 3270 NL_SET_ERR_MSG(extack, 3271 "Cannot do software bridging with a DSA conduit"); 3272 return notifier_from_errno(-EINVAL); 3273 } 3274 } 3275 3276 return NOTIFY_DONE; 3277 } 3278 3279 static void dsa_tree_migrate_ports_from_lag_conduit(struct dsa_switch_tree *dst, 3280 struct net_device *lag_dev) 3281 { 3282 struct net_device *new_conduit = dsa_tree_find_first_conduit(dst); 3283 struct dsa_port *dp; 3284 int err; 3285 3286 dsa_tree_for_each_user_port(dp, dst) { 3287 if (dsa_port_to_conduit(dp) != lag_dev) 3288 continue; 3289 3290 err = dsa_user_change_conduit(dp->user, new_conduit, NULL); 3291 if (err) { 3292 netdev_err(dp->user, 3293 "failed to restore conduit to %s: %pe\n", 3294 new_conduit->name, ERR_PTR(err)); 3295 } 3296 } 3297 } 3298 3299 static int dsa_conduit_lag_join(struct net_device *conduit, 3300 struct net_device *lag_dev, 3301 struct netdev_lag_upper_info *uinfo, 3302 struct netlink_ext_ack *extack) 3303 { 3304 struct dsa_port *cpu_dp = conduit->dsa_ptr; 3305 struct dsa_switch_tree *dst = cpu_dp->dst; 3306 struct dsa_port *dp; 3307 int err; 3308 3309 err = dsa_conduit_lag_setup(lag_dev, cpu_dp, uinfo, extack); 3310 if (err) 3311 return err; 3312 3313 dsa_tree_for_each_user_port(dp, dst) { 3314 if (dsa_port_to_conduit(dp) != conduit) 3315 continue; 3316 3317 err = dsa_user_change_conduit(dp->user, lag_dev, extack); 3318 if (err) 3319 goto restore; 3320 } 3321 3322 return 0; 3323 3324 restore: 3325 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3326 if (dsa_port_to_conduit(dp) != lag_dev) 3327 continue; 3328 3329 err = dsa_user_change_conduit(dp->user, conduit, NULL); 3330 if (err) { 3331 netdev_err(dp->user, 3332 "failed to restore conduit to %s: %pe\n", 3333 conduit->name, ERR_PTR(err)); 3334 } 3335 } 3336 3337 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3338 3339 return err; 3340 } 3341 3342 static void dsa_conduit_lag_leave(struct net_device *conduit, 3343 struct net_device *lag_dev) 3344 { 3345 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3346 struct dsa_switch_tree *dst = cpu_dp->dst; 3347 struct dsa_port *new_cpu_dp = NULL; 3348 struct net_device *lower; 3349 struct list_head *iter; 3350 3351 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3352 if (netdev_uses_dsa(lower)) { 3353 new_cpu_dp = lower->dsa_ptr; 3354 break; 3355 } 3356 } 3357 3358 if (new_cpu_dp) { 3359 /* Update the CPU port of the user ports still under the LAG 3360 * so that dsa_port_to_conduit() continues to work properly 3361 */ 3362 dsa_tree_for_each_user_port(dp, dst) 3363 if (dsa_port_to_conduit(dp) == lag_dev) 3364 dp->cpu_dp = new_cpu_dp; 3365 3366 /* Update the index of the virtual CPU port to match the lowest 3367 * physical CPU port 3368 */ 3369 lag_dev->dsa_ptr = new_cpu_dp; 3370 wmb(); 3371 } else { 3372 /* If the LAG DSA conduit has no ports left, migrate back all 3373 * user ports to the first physical CPU port 3374 */ 3375 dsa_tree_migrate_ports_from_lag_conduit(dst, lag_dev); 3376 } 3377 3378 /* This DSA conduit has left its LAG in any case, so let 3379 * the CPU port leave the hardware LAG as well 3380 */ 3381 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3382 } 3383 3384 static int dsa_conduit_changeupper(struct net_device *dev, 3385 struct netdev_notifier_changeupper_info *info) 3386 { 3387 struct netlink_ext_ack *extack; 3388 int err = NOTIFY_DONE; 3389 3390 if (!netdev_uses_dsa(dev)) 3391 return err; 3392 3393 extack = netdev_notifier_info_to_extack(&info->info); 3394 3395 if (netif_is_lag_master(info->upper_dev)) { 3396 if (info->linking) { 3397 err = dsa_conduit_lag_join(dev, info->upper_dev, 3398 info->upper_info, extack); 3399 err = notifier_from_errno(err); 3400 } else { 3401 dsa_conduit_lag_leave(dev, info->upper_dev); 3402 err = NOTIFY_OK; 3403 } 3404 } 3405 3406 return err; 3407 } 3408 3409 static int dsa_user_netdevice_event(struct notifier_block *nb, 3410 unsigned long event, void *ptr) 3411 { 3412 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3413 3414 switch (event) { 3415 case NETDEV_PRECHANGEUPPER: { 3416 struct netdev_notifier_changeupper_info *info = ptr; 3417 int err; 3418 3419 err = dsa_user_prechangeupper_sanity_check(dev, info); 3420 if (notifier_to_errno(err)) 3421 return err; 3422 3423 err = dsa_conduit_prechangeupper_sanity_check(dev, info); 3424 if (notifier_to_errno(err)) 3425 return err; 3426 3427 err = dsa_lag_conduit_prechangelower_sanity_check(dev, info); 3428 if (notifier_to_errno(err)) 3429 return err; 3430 3431 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3432 if (notifier_to_errno(err)) 3433 return err; 3434 3435 err = dsa_user_prechangeupper(dev, ptr); 3436 if (notifier_to_errno(err)) 3437 return err; 3438 3439 err = dsa_user_lag_prechangeupper(dev, ptr); 3440 if (notifier_to_errno(err)) 3441 return err; 3442 3443 break; 3444 } 3445 case NETDEV_CHANGEUPPER: { 3446 int err; 3447 3448 err = dsa_user_changeupper(dev, ptr); 3449 if (notifier_to_errno(err)) 3450 return err; 3451 3452 err = dsa_user_lag_changeupper(dev, ptr); 3453 if (notifier_to_errno(err)) 3454 return err; 3455 3456 err = dsa_conduit_changeupper(dev, ptr); 3457 if (notifier_to_errno(err)) 3458 return err; 3459 3460 break; 3461 } 3462 case NETDEV_CHANGELOWERSTATE: { 3463 struct netdev_notifier_changelowerstate_info *info = ptr; 3464 struct dsa_port *dp; 3465 int err = 0; 3466 3467 if (dsa_user_dev_check(dev)) { 3468 dp = dsa_user_to_port(dev); 3469 3470 err = dsa_port_lag_change(dp, info->lower_state_info); 3471 } 3472 3473 /* Mirror LAG port events on DSA conduits that are in 3474 * a LAG towards their respective switch CPU ports 3475 */ 3476 if (netdev_uses_dsa(dev)) { 3477 dp = dev->dsa_ptr; 3478 3479 err = dsa_port_lag_change(dp, info->lower_state_info); 3480 } 3481 3482 return notifier_from_errno(err); 3483 } 3484 case NETDEV_CHANGE: 3485 case NETDEV_UP: { 3486 /* Track state of conduit port. 3487 * DSA driver may require the conduit port (and indirectly 3488 * the tagger) to be available for some special operation. 3489 */ 3490 if (netdev_uses_dsa(dev)) { 3491 struct dsa_port *cpu_dp = dev->dsa_ptr; 3492 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3493 3494 /* Track when the conduit port is UP */ 3495 dsa_tree_conduit_oper_state_change(dst, dev, 3496 netif_oper_up(dev)); 3497 3498 /* Track when the conduit port is ready and can accept 3499 * packet. 3500 * NETDEV_UP event is not enough to flag a port as ready. 3501 * We also have to wait for linkwatch_do_dev to dev_activate 3502 * and emit a NETDEV_CHANGE event. 3503 * We check if a conduit port is ready by checking if the dev 3504 * have a qdisc assigned and is not noop. 3505 */ 3506 dsa_tree_conduit_admin_state_change(dst, dev, 3507 !qdisc_tx_is_noop(dev)); 3508 3509 return NOTIFY_OK; 3510 } 3511 3512 return NOTIFY_DONE; 3513 } 3514 case NETDEV_GOING_DOWN: { 3515 struct dsa_port *dp, *cpu_dp; 3516 struct dsa_switch_tree *dst; 3517 LIST_HEAD(close_list); 3518 3519 if (!netdev_uses_dsa(dev)) 3520 return NOTIFY_DONE; 3521 3522 cpu_dp = dev->dsa_ptr; 3523 dst = cpu_dp->ds->dst; 3524 3525 dsa_tree_conduit_admin_state_change(dst, dev, false); 3526 3527 list_for_each_entry(dp, &dst->ports, list) { 3528 if (!dsa_port_is_user(dp)) 3529 continue; 3530 3531 if (dp->cpu_dp != cpu_dp) 3532 continue; 3533 3534 list_add(&dp->user->close_list, &close_list); 3535 } 3536 3537 dev_close_many(&close_list, true); 3538 3539 return NOTIFY_OK; 3540 } 3541 default: 3542 break; 3543 } 3544 3545 return NOTIFY_DONE; 3546 } 3547 3548 static void 3549 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3550 { 3551 struct switchdev_notifier_fdb_info info = {}; 3552 3553 info.addr = switchdev_work->addr; 3554 info.vid = switchdev_work->vid; 3555 info.offloaded = true; 3556 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3557 switchdev_work->orig_dev, &info.info, NULL); 3558 } 3559 3560 static void dsa_user_switchdev_event_work(struct work_struct *work) 3561 { 3562 struct dsa_switchdev_event_work *switchdev_work = 3563 container_of(work, struct dsa_switchdev_event_work, work); 3564 const unsigned char *addr = switchdev_work->addr; 3565 struct net_device *dev = switchdev_work->dev; 3566 u16 vid = switchdev_work->vid; 3567 struct dsa_switch *ds; 3568 struct dsa_port *dp; 3569 int err; 3570 3571 dp = dsa_user_to_port(dev); 3572 ds = dp->ds; 3573 3574 switch (switchdev_work->event) { 3575 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3576 if (switchdev_work->host_addr) 3577 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3578 else if (dp->lag) 3579 err = dsa_port_lag_fdb_add(dp, addr, vid); 3580 else 3581 err = dsa_port_fdb_add(dp, addr, vid); 3582 if (err) { 3583 dev_err(ds->dev, 3584 "port %d failed to add %pM vid %d to fdb: %d\n", 3585 dp->index, addr, vid, err); 3586 break; 3587 } 3588 dsa_fdb_offload_notify(switchdev_work); 3589 break; 3590 3591 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3592 if (switchdev_work->host_addr) 3593 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3594 else if (dp->lag) 3595 err = dsa_port_lag_fdb_del(dp, addr, vid); 3596 else 3597 err = dsa_port_fdb_del(dp, addr, vid); 3598 if (err) { 3599 dev_err(ds->dev, 3600 "port %d failed to delete %pM vid %d from fdb: %d\n", 3601 dp->index, addr, vid, err); 3602 } 3603 3604 break; 3605 } 3606 3607 kfree(switchdev_work); 3608 } 3609 3610 static bool dsa_foreign_dev_check(const struct net_device *dev, 3611 const struct net_device *foreign_dev) 3612 { 3613 const struct dsa_port *dp = dsa_user_to_port(dev); 3614 struct dsa_switch_tree *dst = dp->ds->dst; 3615 3616 if (netif_is_bridge_master(foreign_dev)) 3617 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3618 3619 if (netif_is_bridge_port(foreign_dev)) 3620 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3621 3622 /* Everything else is foreign */ 3623 return true; 3624 } 3625 3626 static int dsa_user_fdb_event(struct net_device *dev, 3627 struct net_device *orig_dev, 3628 unsigned long event, const void *ctx, 3629 const struct switchdev_notifier_fdb_info *fdb_info) 3630 { 3631 struct dsa_switchdev_event_work *switchdev_work; 3632 struct dsa_port *dp = dsa_user_to_port(dev); 3633 bool host_addr = fdb_info->is_local; 3634 struct dsa_switch *ds = dp->ds; 3635 3636 if (ctx && ctx != dp) 3637 return 0; 3638 3639 if (!dp->bridge) 3640 return 0; 3641 3642 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3643 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3644 return 0; 3645 3646 /* FDB entries learned by the software bridge or by foreign 3647 * bridge ports should be installed as host addresses only if 3648 * the driver requests assisted learning. 3649 */ 3650 if (!ds->assisted_learning_on_cpu_port) 3651 return 0; 3652 } 3653 3654 /* Also treat FDB entries on foreign interfaces bridged with us as host 3655 * addresses. 3656 */ 3657 if (dsa_foreign_dev_check(dev, orig_dev)) 3658 host_addr = true; 3659 3660 /* Check early that we're not doing work in vain. 3661 * Host addresses on LAG ports still require regular FDB ops, 3662 * since the CPU port isn't in a LAG. 3663 */ 3664 if (dp->lag && !host_addr) { 3665 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3666 return -EOPNOTSUPP; 3667 } else { 3668 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3669 return -EOPNOTSUPP; 3670 } 3671 3672 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3673 if (!switchdev_work) 3674 return -ENOMEM; 3675 3676 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3677 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3678 orig_dev->name, fdb_info->addr, fdb_info->vid, 3679 host_addr ? " as host address" : ""); 3680 3681 INIT_WORK(&switchdev_work->work, dsa_user_switchdev_event_work); 3682 switchdev_work->event = event; 3683 switchdev_work->dev = dev; 3684 switchdev_work->orig_dev = orig_dev; 3685 3686 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3687 switchdev_work->vid = fdb_info->vid; 3688 switchdev_work->host_addr = host_addr; 3689 3690 dsa_schedule_work(&switchdev_work->work); 3691 3692 return 0; 3693 } 3694 3695 /* Called under rcu_read_lock() */ 3696 static int dsa_user_switchdev_event(struct notifier_block *unused, 3697 unsigned long event, void *ptr) 3698 { 3699 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3700 int err; 3701 3702 switch (event) { 3703 case SWITCHDEV_PORT_ATTR_SET: 3704 err = switchdev_handle_port_attr_set(dev, ptr, 3705 dsa_user_dev_check, 3706 dsa_user_port_attr_set); 3707 return notifier_from_errno(err); 3708 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3709 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3710 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3711 dsa_user_dev_check, 3712 dsa_foreign_dev_check, 3713 dsa_user_fdb_event); 3714 return notifier_from_errno(err); 3715 default: 3716 return NOTIFY_DONE; 3717 } 3718 3719 return NOTIFY_OK; 3720 } 3721 3722 static int dsa_user_switchdev_blocking_event(struct notifier_block *unused, 3723 unsigned long event, void *ptr) 3724 { 3725 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3726 int err; 3727 3728 switch (event) { 3729 case SWITCHDEV_PORT_OBJ_ADD: 3730 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3731 dsa_user_dev_check, 3732 dsa_foreign_dev_check, 3733 dsa_user_port_obj_add); 3734 return notifier_from_errno(err); 3735 case SWITCHDEV_PORT_OBJ_DEL: 3736 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3737 dsa_user_dev_check, 3738 dsa_foreign_dev_check, 3739 dsa_user_port_obj_del); 3740 return notifier_from_errno(err); 3741 case SWITCHDEV_PORT_ATTR_SET: 3742 err = switchdev_handle_port_attr_set(dev, ptr, 3743 dsa_user_dev_check, 3744 dsa_user_port_attr_set); 3745 return notifier_from_errno(err); 3746 } 3747 3748 return NOTIFY_DONE; 3749 } 3750 3751 static struct notifier_block dsa_user_nb __read_mostly = { 3752 .notifier_call = dsa_user_netdevice_event, 3753 }; 3754 3755 struct notifier_block dsa_user_switchdev_notifier = { 3756 .notifier_call = dsa_user_switchdev_event, 3757 }; 3758 3759 struct notifier_block dsa_user_switchdev_blocking_notifier = { 3760 .notifier_call = dsa_user_switchdev_blocking_event, 3761 }; 3762 3763 int dsa_user_register_notifier(void) 3764 { 3765 struct notifier_block *nb; 3766 int err; 3767 3768 err = register_netdevice_notifier(&dsa_user_nb); 3769 if (err) 3770 return err; 3771 3772 err = register_switchdev_notifier(&dsa_user_switchdev_notifier); 3773 if (err) 3774 goto err_switchdev_nb; 3775 3776 nb = &dsa_user_switchdev_blocking_notifier; 3777 err = register_switchdev_blocking_notifier(nb); 3778 if (err) 3779 goto err_switchdev_blocking_nb; 3780 3781 return 0; 3782 3783 err_switchdev_blocking_nb: 3784 unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3785 err_switchdev_nb: 3786 unregister_netdevice_notifier(&dsa_user_nb); 3787 return err; 3788 } 3789 3790 void dsa_user_unregister_notifier(void) 3791 { 3792 struct notifier_block *nb; 3793 int err; 3794 3795 nb = &dsa_user_switchdev_blocking_notifier; 3796 err = unregister_switchdev_blocking_notifier(nb); 3797 if (err) 3798 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3799 3800 err = unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3801 if (err) 3802 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3803 3804 err = unregister_netdevice_notifier(&dsa_user_nb); 3805 if (err) 3806 pr_err("DSA: failed to unregister user notifier (%d)\n", err); 3807 } 3808