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 struct ndo_fdb_dump_context *ctx = (void *)dump->cb->ctx; 519 u32 portid = NETLINK_CB(dump->cb->skb).portid; 520 u32 seq = dump->cb->nlh->nlmsg_seq; 521 struct nlmsghdr *nlh; 522 struct ndmsg *ndm; 523 524 if (dump->idx < ctx->fdb_idx) 525 goto skip; 526 527 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 528 sizeof(*ndm), NLM_F_MULTI); 529 if (!nlh) 530 return -EMSGSIZE; 531 532 ndm = nlmsg_data(nlh); 533 ndm->ndm_family = AF_BRIDGE; 534 ndm->ndm_pad1 = 0; 535 ndm->ndm_pad2 = 0; 536 ndm->ndm_flags = NTF_SELF; 537 ndm->ndm_type = 0; 538 ndm->ndm_ifindex = dump->dev->ifindex; 539 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 540 541 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 542 goto nla_put_failure; 543 544 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 545 goto nla_put_failure; 546 547 nlmsg_end(dump->skb, nlh); 548 549 skip: 550 dump->idx++; 551 return 0; 552 553 nla_put_failure: 554 nlmsg_cancel(dump->skb, nlh); 555 return -EMSGSIZE; 556 } 557 558 static int 559 dsa_user_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 560 struct net_device *dev, struct net_device *filter_dev, 561 int *idx) 562 { 563 struct dsa_port *dp = dsa_user_to_port(dev); 564 struct dsa_user_dump_ctx dump = { 565 .dev = dev, 566 .skb = skb, 567 .cb = cb, 568 .idx = *idx, 569 }; 570 int err; 571 572 err = dsa_port_fdb_dump(dp, dsa_user_port_fdb_do_dump, &dump); 573 *idx = dump.idx; 574 575 return err; 576 } 577 578 static int dsa_user_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 579 { 580 struct dsa_user_priv *p = netdev_priv(dev); 581 582 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 583 } 584 585 static int dsa_user_port_attr_set(struct net_device *dev, const void *ctx, 586 const struct switchdev_attr *attr, 587 struct netlink_ext_ack *extack) 588 { 589 struct dsa_port *dp = dsa_user_to_port(dev); 590 int ret; 591 592 if (ctx && ctx != dp) 593 return 0; 594 595 switch (attr->id) { 596 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 597 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 598 return -EOPNOTSUPP; 599 600 ret = dsa_port_set_state(dp, attr->u.stp_state, true); 601 break; 602 case SWITCHDEV_ATTR_ID_PORT_MST_STATE: 603 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 604 return -EOPNOTSUPP; 605 606 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack); 607 break; 608 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 609 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 610 return -EOPNOTSUPP; 611 612 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 613 extack); 614 break; 615 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 616 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 617 return -EOPNOTSUPP; 618 619 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 620 break; 621 case SWITCHDEV_ATTR_ID_BRIDGE_MST: 622 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 623 return -EOPNOTSUPP; 624 625 ret = dsa_port_mst_enable(dp, attr->u.mst, extack); 626 break; 627 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 628 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 629 return -EOPNOTSUPP; 630 631 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 632 extack); 633 break; 634 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 635 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 636 return -EOPNOTSUPP; 637 638 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 639 break; 640 case SWITCHDEV_ATTR_ID_VLAN_MSTI: 641 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 642 return -EOPNOTSUPP; 643 644 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti); 645 break; 646 default: 647 ret = -EOPNOTSUPP; 648 break; 649 } 650 651 return ret; 652 } 653 654 /* Must be called under rcu_read_lock() */ 655 static int 656 dsa_user_vlan_check_for_8021q_uppers(struct net_device *user, 657 const struct switchdev_obj_port_vlan *vlan) 658 { 659 struct net_device *upper_dev; 660 struct list_head *iter; 661 662 netdev_for_each_upper_dev_rcu(user, upper_dev, iter) { 663 u16 vid; 664 665 if (!is_vlan_dev(upper_dev)) 666 continue; 667 668 vid = vlan_dev_vlan_id(upper_dev); 669 if (vid == vlan->vid) 670 return -EBUSY; 671 } 672 673 return 0; 674 } 675 676 static int dsa_user_vlan_add(struct net_device *dev, 677 const struct switchdev_obj *obj, 678 struct netlink_ext_ack *extack) 679 { 680 struct dsa_port *dp = dsa_user_to_port(dev); 681 struct switchdev_obj_port_vlan *vlan; 682 int err; 683 684 if (dsa_port_skip_vlan_configuration(dp)) { 685 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 686 return 0; 687 } 688 689 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 690 691 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 692 * the same VID. 693 */ 694 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { 695 rcu_read_lock(); 696 err = dsa_user_vlan_check_for_8021q_uppers(dev, vlan); 697 rcu_read_unlock(); 698 if (err) { 699 NL_SET_ERR_MSG_MOD(extack, 700 "Port already has a VLAN upper with this VID"); 701 return err; 702 } 703 } 704 705 return dsa_port_vlan_add(dp, vlan, extack); 706 } 707 708 /* Offload a VLAN installed on the bridge or on a foreign interface by 709 * installing it as a VLAN towards the CPU port. 710 */ 711 static int dsa_user_host_vlan_add(struct net_device *dev, 712 const struct switchdev_obj *obj, 713 struct netlink_ext_ack *extack) 714 { 715 struct dsa_port *dp = dsa_user_to_port(dev); 716 struct switchdev_obj_port_vlan vlan; 717 718 /* Do nothing if this is a software bridge */ 719 if (!dp->bridge) 720 return -EOPNOTSUPP; 721 722 if (dsa_port_skip_vlan_configuration(dp)) { 723 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 724 return 0; 725 } 726 727 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 728 729 /* Even though drivers often handle CPU membership in special ways, 730 * it doesn't make sense to program a PVID, so clear this flag. 731 */ 732 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 733 734 return dsa_port_host_vlan_add(dp, &vlan, extack); 735 } 736 737 static int dsa_user_port_obj_add(struct net_device *dev, const void *ctx, 738 const struct switchdev_obj *obj, 739 struct netlink_ext_ack *extack) 740 { 741 struct dsa_port *dp = dsa_user_to_port(dev); 742 int err; 743 744 if (ctx && ctx != dp) 745 return 0; 746 747 switch (obj->id) { 748 case SWITCHDEV_OBJ_ID_PORT_MDB: 749 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 750 return -EOPNOTSUPP; 751 752 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 753 break; 754 case SWITCHDEV_OBJ_ID_HOST_MDB: 755 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 756 return -EOPNOTSUPP; 757 758 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 759 break; 760 case SWITCHDEV_OBJ_ID_PORT_VLAN: 761 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 762 err = dsa_user_vlan_add(dev, obj, extack); 763 else 764 err = dsa_user_host_vlan_add(dev, obj, extack); 765 break; 766 case SWITCHDEV_OBJ_ID_MRP: 767 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 768 return -EOPNOTSUPP; 769 770 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 771 break; 772 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 773 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 774 return -EOPNOTSUPP; 775 776 err = dsa_port_mrp_add_ring_role(dp, 777 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 778 break; 779 default: 780 err = -EOPNOTSUPP; 781 break; 782 } 783 784 return err; 785 } 786 787 static int dsa_user_vlan_del(struct net_device *dev, 788 const struct switchdev_obj *obj) 789 { 790 struct dsa_port *dp = dsa_user_to_port(dev); 791 struct switchdev_obj_port_vlan *vlan; 792 793 if (dsa_port_skip_vlan_configuration(dp)) 794 return 0; 795 796 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 797 798 return dsa_port_vlan_del(dp, vlan); 799 } 800 801 static int dsa_user_host_vlan_del(struct net_device *dev, 802 const struct switchdev_obj *obj) 803 { 804 struct dsa_port *dp = dsa_user_to_port(dev); 805 struct switchdev_obj_port_vlan *vlan; 806 807 /* Do nothing if this is a software bridge */ 808 if (!dp->bridge) 809 return -EOPNOTSUPP; 810 811 if (dsa_port_skip_vlan_configuration(dp)) 812 return 0; 813 814 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 815 816 return dsa_port_host_vlan_del(dp, vlan); 817 } 818 819 static int dsa_user_port_obj_del(struct net_device *dev, const void *ctx, 820 const struct switchdev_obj *obj) 821 { 822 struct dsa_port *dp = dsa_user_to_port(dev); 823 int err; 824 825 if (ctx && ctx != dp) 826 return 0; 827 828 switch (obj->id) { 829 case SWITCHDEV_OBJ_ID_PORT_MDB: 830 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 831 return -EOPNOTSUPP; 832 833 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 834 break; 835 case SWITCHDEV_OBJ_ID_HOST_MDB: 836 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 837 return -EOPNOTSUPP; 838 839 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 840 break; 841 case SWITCHDEV_OBJ_ID_PORT_VLAN: 842 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 843 err = dsa_user_vlan_del(dev, obj); 844 else 845 err = dsa_user_host_vlan_del(dev, obj); 846 break; 847 case SWITCHDEV_OBJ_ID_MRP: 848 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 849 return -EOPNOTSUPP; 850 851 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 852 break; 853 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 854 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 855 return -EOPNOTSUPP; 856 857 err = dsa_port_mrp_del_ring_role(dp, 858 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 859 break; 860 default: 861 err = -EOPNOTSUPP; 862 break; 863 } 864 865 return err; 866 } 867 868 static netdev_tx_t dsa_user_netpoll_send_skb(struct net_device *dev, 869 struct sk_buff *skb) 870 { 871 #ifdef CONFIG_NET_POLL_CONTROLLER 872 struct dsa_user_priv *p = netdev_priv(dev); 873 874 return netpoll_send_skb(p->netpoll, skb); 875 #else 876 BUG(); 877 return NETDEV_TX_OK; 878 #endif 879 } 880 881 static void dsa_skb_tx_timestamp(struct dsa_user_priv *p, 882 struct sk_buff *skb) 883 { 884 struct dsa_switch *ds = p->dp->ds; 885 886 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP_NOBPF)) 887 return; 888 889 if (!ds->ops->port_txtstamp) 890 return; 891 892 ds->ops->port_txtstamp(ds, p->dp->index, skb); 893 } 894 895 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 896 { 897 /* SKB for netpoll still need to be mangled with the protocol-specific 898 * tag to be successfully transmitted 899 */ 900 if (unlikely(netpoll_tx_running(dev))) 901 return dsa_user_netpoll_send_skb(dev, skb); 902 903 /* Queue the SKB for transmission on the parent interface, but 904 * do not modify its EtherType 905 */ 906 skb->dev = dsa_user_to_conduit(dev); 907 dev_queue_xmit(skb); 908 909 return NETDEV_TX_OK; 910 } 911 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 912 913 static netdev_tx_t dsa_user_xmit(struct sk_buff *skb, struct net_device *dev) 914 { 915 struct dsa_user_priv *p = netdev_priv(dev); 916 struct sk_buff *nskb; 917 918 dev_sw_netstats_tx_add(dev, 1, skb->len); 919 920 memset(skb->cb, 0, sizeof(skb->cb)); 921 922 /* Handle tx timestamp if any */ 923 dsa_skb_tx_timestamp(p, skb); 924 925 if (skb_ensure_writable_head_tail(skb, dev)) { 926 dev_kfree_skb_any(skb); 927 return NETDEV_TX_OK; 928 } 929 930 /* needed_tailroom should still be 'warm' in the cache line from 931 * skb_ensure_writable_head_tail(), which has also ensured that 932 * padding is safe. 933 */ 934 if (dev->needed_tailroom) 935 eth_skb_pad(skb); 936 937 /* Transmit function may have to reallocate the original SKB, 938 * in which case it must have freed it. Only free it here on error. 939 */ 940 nskb = p->xmit(skb, dev); 941 if (!nskb) { 942 kfree_skb(skb); 943 return NETDEV_TX_OK; 944 } 945 946 return dsa_enqueue_skb(nskb, dev); 947 } 948 949 /* ethtool operations *******************************************************/ 950 951 static void dsa_user_get_drvinfo(struct net_device *dev, 952 struct ethtool_drvinfo *drvinfo) 953 { 954 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 955 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 956 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 957 } 958 959 static int dsa_user_get_regs_len(struct net_device *dev) 960 { 961 struct dsa_port *dp = dsa_user_to_port(dev); 962 struct dsa_switch *ds = dp->ds; 963 964 if (ds->ops->get_regs_len) 965 return ds->ops->get_regs_len(ds, dp->index); 966 967 return -EOPNOTSUPP; 968 } 969 970 static void 971 dsa_user_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 972 { 973 struct dsa_port *dp = dsa_user_to_port(dev); 974 struct dsa_switch *ds = dp->ds; 975 976 if (ds->ops->get_regs) 977 ds->ops->get_regs(ds, dp->index, regs, _p); 978 } 979 980 static int dsa_user_nway_reset(struct net_device *dev) 981 { 982 struct dsa_port *dp = dsa_user_to_port(dev); 983 984 return phylink_ethtool_nway_reset(dp->pl); 985 } 986 987 static int dsa_user_get_eeprom_len(struct net_device *dev) 988 { 989 struct dsa_port *dp = dsa_user_to_port(dev); 990 struct dsa_switch *ds = dp->ds; 991 992 if (ds->cd && ds->cd->eeprom_len) 993 return ds->cd->eeprom_len; 994 995 if (ds->ops->get_eeprom_len) 996 return ds->ops->get_eeprom_len(ds); 997 998 return 0; 999 } 1000 1001 static int dsa_user_get_eeprom(struct net_device *dev, 1002 struct ethtool_eeprom *eeprom, u8 *data) 1003 { 1004 struct dsa_port *dp = dsa_user_to_port(dev); 1005 struct dsa_switch *ds = dp->ds; 1006 1007 if (ds->ops->get_eeprom) 1008 return ds->ops->get_eeprom(ds, eeprom, data); 1009 1010 return -EOPNOTSUPP; 1011 } 1012 1013 static int dsa_user_set_eeprom(struct net_device *dev, 1014 struct ethtool_eeprom *eeprom, u8 *data) 1015 { 1016 struct dsa_port *dp = dsa_user_to_port(dev); 1017 struct dsa_switch *ds = dp->ds; 1018 1019 if (ds->ops->set_eeprom) 1020 return ds->ops->set_eeprom(ds, eeprom, data); 1021 1022 return -EOPNOTSUPP; 1023 } 1024 1025 static void dsa_user_get_strings(struct net_device *dev, 1026 uint32_t stringset, uint8_t *data) 1027 { 1028 struct dsa_port *dp = dsa_user_to_port(dev); 1029 struct dsa_switch *ds = dp->ds; 1030 1031 if (stringset == ETH_SS_STATS) { 1032 ethtool_puts(&data, "tx_packets"); 1033 ethtool_puts(&data, "tx_bytes"); 1034 ethtool_puts(&data, "rx_packets"); 1035 ethtool_puts(&data, "rx_bytes"); 1036 if (ds->ops->get_strings) 1037 ds->ops->get_strings(ds, dp->index, stringset, data); 1038 } else if (stringset == ETH_SS_TEST) { 1039 net_selftest_get_strings(data); 1040 } 1041 1042 } 1043 1044 static void dsa_user_get_ethtool_stats(struct net_device *dev, 1045 struct ethtool_stats *stats, 1046 uint64_t *data) 1047 { 1048 struct dsa_port *dp = dsa_user_to_port(dev); 1049 struct dsa_switch *ds = dp->ds; 1050 struct pcpu_sw_netstats *s; 1051 unsigned int start; 1052 int i; 1053 1054 for_each_possible_cpu(i) { 1055 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 1056 1057 s = per_cpu_ptr(dev->tstats, i); 1058 do { 1059 start = u64_stats_fetch_begin(&s->syncp); 1060 tx_packets = u64_stats_read(&s->tx_packets); 1061 tx_bytes = u64_stats_read(&s->tx_bytes); 1062 rx_packets = u64_stats_read(&s->rx_packets); 1063 rx_bytes = u64_stats_read(&s->rx_bytes); 1064 } while (u64_stats_fetch_retry(&s->syncp, start)); 1065 data[0] += tx_packets; 1066 data[1] += tx_bytes; 1067 data[2] += rx_packets; 1068 data[3] += rx_bytes; 1069 } 1070 if (ds->ops->get_ethtool_stats) 1071 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 1072 } 1073 1074 static int dsa_user_get_sset_count(struct net_device *dev, int sset) 1075 { 1076 struct dsa_port *dp = dsa_user_to_port(dev); 1077 struct dsa_switch *ds = dp->ds; 1078 1079 if (sset == ETH_SS_STATS) { 1080 int count = 0; 1081 1082 if (ds->ops->get_sset_count) { 1083 count = ds->ops->get_sset_count(ds, dp->index, sset); 1084 if (count < 0) 1085 return count; 1086 } 1087 1088 return count + 4; 1089 } else if (sset == ETH_SS_TEST) { 1090 return net_selftest_get_count(); 1091 } 1092 1093 return -EOPNOTSUPP; 1094 } 1095 1096 static void dsa_user_get_eth_phy_stats(struct net_device *dev, 1097 struct ethtool_eth_phy_stats *phy_stats) 1098 { 1099 struct dsa_port *dp = dsa_user_to_port(dev); 1100 struct dsa_switch *ds = dp->ds; 1101 1102 if (ds->ops->get_eth_phy_stats) 1103 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats); 1104 } 1105 1106 static void dsa_user_get_eth_mac_stats(struct net_device *dev, 1107 struct ethtool_eth_mac_stats *mac_stats) 1108 { 1109 struct dsa_port *dp = dsa_user_to_port(dev); 1110 struct dsa_switch *ds = dp->ds; 1111 1112 if (ds->ops->get_eth_mac_stats) 1113 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats); 1114 } 1115 1116 static void 1117 dsa_user_get_eth_ctrl_stats(struct net_device *dev, 1118 struct ethtool_eth_ctrl_stats *ctrl_stats) 1119 { 1120 struct dsa_port *dp = dsa_user_to_port(dev); 1121 struct dsa_switch *ds = dp->ds; 1122 1123 if (ds->ops->get_eth_ctrl_stats) 1124 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats); 1125 } 1126 1127 static void 1128 dsa_user_get_rmon_stats(struct net_device *dev, 1129 struct ethtool_rmon_stats *rmon_stats, 1130 const struct ethtool_rmon_hist_range **ranges) 1131 { 1132 struct dsa_port *dp = dsa_user_to_port(dev); 1133 struct dsa_switch *ds = dp->ds; 1134 1135 if (ds->ops->get_rmon_stats) 1136 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges); 1137 } 1138 1139 static void dsa_user_get_ts_stats(struct net_device *dev, 1140 struct ethtool_ts_stats *ts_stats) 1141 { 1142 struct dsa_port *dp = dsa_user_to_port(dev); 1143 struct dsa_switch *ds = dp->ds; 1144 1145 if (ds->ops->get_ts_stats) 1146 ds->ops->get_ts_stats(ds, dp->index, ts_stats); 1147 } 1148 1149 static void dsa_user_net_selftest(struct net_device *ndev, 1150 struct ethtool_test *etest, u64 *buf) 1151 { 1152 struct dsa_port *dp = dsa_user_to_port(ndev); 1153 struct dsa_switch *ds = dp->ds; 1154 1155 if (ds->ops->self_test) { 1156 ds->ops->self_test(ds, dp->index, etest, buf); 1157 return; 1158 } 1159 1160 net_selftest(ndev, etest, buf); 1161 } 1162 1163 static int dsa_user_get_mm(struct net_device *dev, 1164 struct ethtool_mm_state *state) 1165 { 1166 struct dsa_port *dp = dsa_user_to_port(dev); 1167 struct dsa_switch *ds = dp->ds; 1168 1169 if (!ds->ops->get_mm) 1170 return -EOPNOTSUPP; 1171 1172 return ds->ops->get_mm(ds, dp->index, state); 1173 } 1174 1175 static int dsa_user_set_mm(struct net_device *dev, struct ethtool_mm_cfg *cfg, 1176 struct netlink_ext_ack *extack) 1177 { 1178 struct dsa_port *dp = dsa_user_to_port(dev); 1179 struct dsa_switch *ds = dp->ds; 1180 1181 if (!ds->ops->set_mm) 1182 return -EOPNOTSUPP; 1183 1184 return ds->ops->set_mm(ds, dp->index, cfg, extack); 1185 } 1186 1187 static void dsa_user_get_mm_stats(struct net_device *dev, 1188 struct ethtool_mm_stats *stats) 1189 { 1190 struct dsa_port *dp = dsa_user_to_port(dev); 1191 struct dsa_switch *ds = dp->ds; 1192 1193 if (ds->ops->get_mm_stats) 1194 ds->ops->get_mm_stats(ds, dp->index, stats); 1195 } 1196 1197 static void dsa_user_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1198 { 1199 struct dsa_port *dp = dsa_user_to_port(dev); 1200 struct dsa_switch *ds = dp->ds; 1201 1202 phylink_ethtool_get_wol(dp->pl, w); 1203 1204 if (ds->ops->get_wol) 1205 ds->ops->get_wol(ds, dp->index, w); 1206 } 1207 1208 static int dsa_user_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1209 { 1210 struct dsa_port *dp = dsa_user_to_port(dev); 1211 struct dsa_switch *ds = dp->ds; 1212 int ret = -EOPNOTSUPP; 1213 1214 phylink_ethtool_set_wol(dp->pl, w); 1215 1216 if (ds->ops->set_wol) 1217 ret = ds->ops->set_wol(ds, dp->index, w); 1218 1219 return ret; 1220 } 1221 1222 static int dsa_user_set_eee(struct net_device *dev, struct ethtool_keee *e) 1223 { 1224 struct dsa_port *dp = dsa_user_to_port(dev); 1225 struct dsa_switch *ds = dp->ds; 1226 int ret; 1227 1228 /* Check whether the switch supports EEE */ 1229 if (!ds->ops->support_eee || !ds->ops->support_eee(ds, dp->index)) 1230 return -EOPNOTSUPP; 1231 1232 /* If the port is using phylink managed EEE, then an unimplemented 1233 * set_mac_eee() is permissible. 1234 */ 1235 if (!phylink_mac_implements_lpi(ds->phylink_mac_ops)) { 1236 /* Port's PHY and MAC both need to be EEE capable */ 1237 if (!dev->phydev) 1238 return -ENODEV; 1239 1240 if (!ds->ops->set_mac_eee) 1241 return -EOPNOTSUPP; 1242 1243 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1244 if (ret) 1245 return ret; 1246 } else if (ds->ops->set_mac_eee) { 1247 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1248 if (ret) 1249 return ret; 1250 } 1251 1252 return phylink_ethtool_set_eee(dp->pl, e); 1253 } 1254 1255 static int dsa_user_get_eee(struct net_device *dev, struct ethtool_keee *e) 1256 { 1257 struct dsa_port *dp = dsa_user_to_port(dev); 1258 struct dsa_switch *ds = dp->ds; 1259 1260 /* Check whether the switch supports EEE */ 1261 if (!ds->ops->support_eee || !ds->ops->support_eee(ds, dp->index)) 1262 return -EOPNOTSUPP; 1263 1264 /* Port's PHY and MAC both need to be EEE capable */ 1265 if (!dev->phydev) 1266 return -ENODEV; 1267 1268 return phylink_ethtool_get_eee(dp->pl, e); 1269 } 1270 1271 static int dsa_user_get_link_ksettings(struct net_device *dev, 1272 struct ethtool_link_ksettings *cmd) 1273 { 1274 struct dsa_port *dp = dsa_user_to_port(dev); 1275 1276 return phylink_ethtool_ksettings_get(dp->pl, cmd); 1277 } 1278 1279 static int dsa_user_set_link_ksettings(struct net_device *dev, 1280 const struct ethtool_link_ksettings *cmd) 1281 { 1282 struct dsa_port *dp = dsa_user_to_port(dev); 1283 1284 return phylink_ethtool_ksettings_set(dp->pl, cmd); 1285 } 1286 1287 static void dsa_user_get_pause_stats(struct net_device *dev, 1288 struct ethtool_pause_stats *pause_stats) 1289 { 1290 struct dsa_port *dp = dsa_user_to_port(dev); 1291 struct dsa_switch *ds = dp->ds; 1292 1293 if (ds->ops->get_pause_stats) 1294 ds->ops->get_pause_stats(ds, dp->index, pause_stats); 1295 } 1296 1297 static void dsa_user_get_pauseparam(struct net_device *dev, 1298 struct ethtool_pauseparam *pause) 1299 { 1300 struct dsa_port *dp = dsa_user_to_port(dev); 1301 1302 phylink_ethtool_get_pauseparam(dp->pl, pause); 1303 } 1304 1305 static int dsa_user_set_pauseparam(struct net_device *dev, 1306 struct ethtool_pauseparam *pause) 1307 { 1308 struct dsa_port *dp = dsa_user_to_port(dev); 1309 1310 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1311 } 1312 1313 #ifdef CONFIG_NET_POLL_CONTROLLER 1314 static int dsa_user_netpoll_setup(struct net_device *dev) 1315 { 1316 struct net_device *conduit = dsa_user_to_conduit(dev); 1317 struct dsa_user_priv *p = netdev_priv(dev); 1318 struct netpoll *netpoll; 1319 int err = 0; 1320 1321 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1322 if (!netpoll) 1323 return -ENOMEM; 1324 1325 err = __netpoll_setup(netpoll, conduit); 1326 if (err) { 1327 kfree(netpoll); 1328 goto out; 1329 } 1330 1331 p->netpoll = netpoll; 1332 out: 1333 return err; 1334 } 1335 1336 static void dsa_user_netpoll_cleanup(struct net_device *dev) 1337 { 1338 struct dsa_user_priv *p = netdev_priv(dev); 1339 struct netpoll *netpoll = p->netpoll; 1340 1341 if (!netpoll) 1342 return; 1343 1344 p->netpoll = NULL; 1345 1346 __netpoll_free(netpoll); 1347 } 1348 1349 static void dsa_user_poll_controller(struct net_device *dev) 1350 { 1351 } 1352 #endif 1353 1354 static struct dsa_mall_tc_entry * 1355 dsa_user_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1356 { 1357 struct dsa_user_priv *p = netdev_priv(dev); 1358 struct dsa_mall_tc_entry *mall_tc_entry; 1359 1360 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1361 if (mall_tc_entry->cookie == cookie) 1362 return mall_tc_entry; 1363 1364 return NULL; 1365 } 1366 1367 static int 1368 dsa_user_add_cls_matchall_mirred(struct net_device *dev, 1369 struct tc_cls_matchall_offload *cls, 1370 bool ingress, bool ingress_target) 1371 { 1372 struct netlink_ext_ack *extack = cls->common.extack; 1373 struct dsa_port *dp = dsa_user_to_port(dev); 1374 struct dsa_user_priv *p = netdev_priv(dev); 1375 struct dsa_mall_mirror_tc_entry *mirror; 1376 struct dsa_mall_tc_entry *mall_tc_entry; 1377 struct dsa_switch *ds = dp->ds; 1378 struct flow_action_entry *act; 1379 struct dsa_port *to_dp; 1380 int err; 1381 1382 if (cls->common.protocol != htons(ETH_P_ALL)) { 1383 NL_SET_ERR_MSG_MOD(extack, 1384 "Can only offload \"protocol all\" matchall filter"); 1385 return -EOPNOTSUPP; 1386 } 1387 1388 if (!ds->ops->port_mirror_add) { 1389 NL_SET_ERR_MSG_MOD(extack, 1390 "Switch does not support mirroring operation"); 1391 return -EOPNOTSUPP; 1392 } 1393 1394 if (!flow_action_basic_hw_stats_check(&cls->rule->action, extack)) 1395 return -EOPNOTSUPP; 1396 1397 act = &cls->rule->action.entries[0]; 1398 1399 if (!act->dev) 1400 return -EINVAL; 1401 1402 if (dsa_user_dev_check(act->dev)) { 1403 if (ingress_target) { 1404 /* We can only fulfill this using software assist */ 1405 if (cls->common.skip_sw) { 1406 NL_SET_ERR_MSG_MOD(extack, 1407 "Can only mirred to ingress of DSA user port if filter also runs in software"); 1408 return -EOPNOTSUPP; 1409 } 1410 to_dp = dp->cpu_dp; 1411 } else { 1412 to_dp = dsa_user_to_port(act->dev); 1413 } 1414 } else { 1415 /* Handle mirroring to foreign target ports as a mirror towards 1416 * the CPU. The software tc rule will take the packets from 1417 * there. 1418 */ 1419 if (cls->common.skip_sw) { 1420 NL_SET_ERR_MSG_MOD(extack, 1421 "Can only mirred to CPU if filter also runs in software"); 1422 return -EOPNOTSUPP; 1423 } 1424 to_dp = dp->cpu_dp; 1425 } 1426 1427 if (dp->ds != to_dp->ds) { 1428 NL_SET_ERR_MSG_MOD(extack, 1429 "Cross-chip mirroring not implemented"); 1430 return -EOPNOTSUPP; 1431 } 1432 1433 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1434 if (!mall_tc_entry) 1435 return -ENOMEM; 1436 1437 mall_tc_entry->cookie = cls->cookie; 1438 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1439 mirror = &mall_tc_entry->mirror; 1440 mirror->to_local_port = to_dp->index; 1441 mirror->ingress = ingress; 1442 1443 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1444 if (err) { 1445 kfree(mall_tc_entry); 1446 return err; 1447 } 1448 1449 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1450 1451 return err; 1452 } 1453 1454 static int 1455 dsa_user_add_cls_matchall_police(struct net_device *dev, 1456 struct tc_cls_matchall_offload *cls, 1457 bool ingress) 1458 { 1459 struct netlink_ext_ack *extack = cls->common.extack; 1460 struct dsa_port *dp = dsa_user_to_port(dev); 1461 struct dsa_user_priv *p = netdev_priv(dev); 1462 struct dsa_mall_tc_entry *mall_tc_entry; 1463 struct flow_action_police *policer; 1464 struct dsa_switch *ds = dp->ds; 1465 struct flow_action_entry *act; 1466 int err; 1467 1468 if (!ds->ops->port_policer_add) { 1469 NL_SET_ERR_MSG_MOD(extack, 1470 "Policing offload not implemented"); 1471 return -EOPNOTSUPP; 1472 } 1473 1474 if (!ingress) { 1475 NL_SET_ERR_MSG_MOD(extack, 1476 "Only supported on ingress qdisc"); 1477 return -EOPNOTSUPP; 1478 } 1479 1480 if (!flow_action_basic_hw_stats_check(&cls->rule->action, extack)) 1481 return -EOPNOTSUPP; 1482 1483 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1484 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1485 NL_SET_ERR_MSG_MOD(extack, 1486 "Only one port policer allowed"); 1487 return -EEXIST; 1488 } 1489 } 1490 1491 act = &cls->rule->action.entries[0]; 1492 1493 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1494 if (!mall_tc_entry) 1495 return -ENOMEM; 1496 1497 mall_tc_entry->cookie = cls->cookie; 1498 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1499 policer = &mall_tc_entry->policer; 1500 *policer = act->police; 1501 1502 err = ds->ops->port_policer_add(ds, dp->index, policer); 1503 if (err) { 1504 kfree(mall_tc_entry); 1505 return err; 1506 } 1507 1508 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1509 1510 return err; 1511 } 1512 1513 static int dsa_user_add_cls_matchall(struct net_device *dev, 1514 struct tc_cls_matchall_offload *cls, 1515 bool ingress) 1516 { 1517 const struct flow_action *action = &cls->rule->action; 1518 struct netlink_ext_ack *extack = cls->common.extack; 1519 1520 if (!flow_offload_has_one_action(action)) { 1521 NL_SET_ERR_MSG_MOD(extack, 1522 "Cannot offload matchall filter with more than one action"); 1523 return -EOPNOTSUPP; 1524 } 1525 1526 switch (action->entries[0].id) { 1527 case FLOW_ACTION_MIRRED: 1528 return dsa_user_add_cls_matchall_mirred(dev, cls, ingress, 1529 false); 1530 case FLOW_ACTION_MIRRED_INGRESS: 1531 return dsa_user_add_cls_matchall_mirred(dev, cls, ingress, 1532 true); 1533 case FLOW_ACTION_POLICE: 1534 return dsa_user_add_cls_matchall_police(dev, cls, ingress); 1535 default: 1536 NL_SET_ERR_MSG_MOD(extack, "Unknown action"); 1537 break; 1538 } 1539 1540 return -EOPNOTSUPP; 1541 } 1542 1543 static void dsa_user_del_cls_matchall(struct net_device *dev, 1544 struct tc_cls_matchall_offload *cls) 1545 { 1546 struct dsa_port *dp = dsa_user_to_port(dev); 1547 struct dsa_mall_tc_entry *mall_tc_entry; 1548 struct dsa_switch *ds = dp->ds; 1549 1550 mall_tc_entry = dsa_user_mall_tc_entry_find(dev, cls->cookie); 1551 if (!mall_tc_entry) 1552 return; 1553 1554 list_del(&mall_tc_entry->list); 1555 1556 switch (mall_tc_entry->type) { 1557 case DSA_PORT_MALL_MIRROR: 1558 if (ds->ops->port_mirror_del) 1559 ds->ops->port_mirror_del(ds, dp->index, 1560 &mall_tc_entry->mirror); 1561 break; 1562 case DSA_PORT_MALL_POLICER: 1563 if (ds->ops->port_policer_del) 1564 ds->ops->port_policer_del(ds, dp->index); 1565 break; 1566 default: 1567 WARN_ON(1); 1568 } 1569 1570 kfree(mall_tc_entry); 1571 } 1572 1573 static int dsa_user_setup_tc_cls_matchall(struct net_device *dev, 1574 struct tc_cls_matchall_offload *cls, 1575 bool ingress) 1576 { 1577 if (cls->common.chain_index) 1578 return -EOPNOTSUPP; 1579 1580 switch (cls->command) { 1581 case TC_CLSMATCHALL_REPLACE: 1582 return dsa_user_add_cls_matchall(dev, cls, ingress); 1583 case TC_CLSMATCHALL_DESTROY: 1584 dsa_user_del_cls_matchall(dev, cls); 1585 return 0; 1586 default: 1587 return -EOPNOTSUPP; 1588 } 1589 } 1590 1591 static int dsa_user_add_cls_flower(struct net_device *dev, 1592 struct flow_cls_offload *cls, 1593 bool ingress) 1594 { 1595 struct dsa_port *dp = dsa_user_to_port(dev); 1596 struct dsa_switch *ds = dp->ds; 1597 int port = dp->index; 1598 1599 if (!ds->ops->cls_flower_add) 1600 return -EOPNOTSUPP; 1601 1602 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1603 } 1604 1605 static int dsa_user_del_cls_flower(struct net_device *dev, 1606 struct flow_cls_offload *cls, 1607 bool ingress) 1608 { 1609 struct dsa_port *dp = dsa_user_to_port(dev); 1610 struct dsa_switch *ds = dp->ds; 1611 int port = dp->index; 1612 1613 if (!ds->ops->cls_flower_del) 1614 return -EOPNOTSUPP; 1615 1616 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1617 } 1618 1619 static int dsa_user_stats_cls_flower(struct net_device *dev, 1620 struct flow_cls_offload *cls, 1621 bool ingress) 1622 { 1623 struct dsa_port *dp = dsa_user_to_port(dev); 1624 struct dsa_switch *ds = dp->ds; 1625 int port = dp->index; 1626 1627 if (!ds->ops->cls_flower_stats) 1628 return -EOPNOTSUPP; 1629 1630 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1631 } 1632 1633 static int dsa_user_setup_tc_cls_flower(struct net_device *dev, 1634 struct flow_cls_offload *cls, 1635 bool ingress) 1636 { 1637 switch (cls->command) { 1638 case FLOW_CLS_REPLACE: 1639 return dsa_user_add_cls_flower(dev, cls, ingress); 1640 case FLOW_CLS_DESTROY: 1641 return dsa_user_del_cls_flower(dev, cls, ingress); 1642 case FLOW_CLS_STATS: 1643 return dsa_user_stats_cls_flower(dev, cls, ingress); 1644 default: 1645 return -EOPNOTSUPP; 1646 } 1647 } 1648 1649 static int dsa_user_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1650 void *cb_priv, bool ingress) 1651 { 1652 struct net_device *dev = cb_priv; 1653 1654 if (!tc_can_offload(dev)) 1655 return -EOPNOTSUPP; 1656 1657 switch (type) { 1658 case TC_SETUP_CLSMATCHALL: 1659 return dsa_user_setup_tc_cls_matchall(dev, type_data, ingress); 1660 case TC_SETUP_CLSFLOWER: 1661 return dsa_user_setup_tc_cls_flower(dev, type_data, ingress); 1662 default: 1663 return -EOPNOTSUPP; 1664 } 1665 } 1666 1667 static int dsa_user_setup_tc_block_cb_ig(enum tc_setup_type type, 1668 void *type_data, void *cb_priv) 1669 { 1670 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, true); 1671 } 1672 1673 static int dsa_user_setup_tc_block_cb_eg(enum tc_setup_type type, 1674 void *type_data, void *cb_priv) 1675 { 1676 return dsa_user_setup_tc_block_cb(type, type_data, cb_priv, false); 1677 } 1678 1679 static LIST_HEAD(dsa_user_block_cb_list); 1680 1681 static int dsa_user_setup_tc_block(struct net_device *dev, 1682 struct flow_block_offload *f) 1683 { 1684 struct flow_block_cb *block_cb; 1685 flow_setup_cb_t *cb; 1686 1687 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1688 cb = dsa_user_setup_tc_block_cb_ig; 1689 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1690 cb = dsa_user_setup_tc_block_cb_eg; 1691 else 1692 return -EOPNOTSUPP; 1693 1694 f->driver_block_list = &dsa_user_block_cb_list; 1695 1696 switch (f->command) { 1697 case FLOW_BLOCK_BIND: 1698 if (flow_block_cb_is_busy(cb, dev, &dsa_user_block_cb_list)) 1699 return -EBUSY; 1700 1701 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1702 if (IS_ERR(block_cb)) 1703 return PTR_ERR(block_cb); 1704 1705 flow_block_cb_add(block_cb, f); 1706 list_add_tail(&block_cb->driver_list, &dsa_user_block_cb_list); 1707 return 0; 1708 case FLOW_BLOCK_UNBIND: 1709 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1710 if (!block_cb) 1711 return -ENOENT; 1712 1713 flow_block_cb_remove(block_cb, f); 1714 list_del(&block_cb->driver_list); 1715 return 0; 1716 default: 1717 return -EOPNOTSUPP; 1718 } 1719 } 1720 1721 static int dsa_user_setup_ft_block(struct dsa_switch *ds, int port, 1722 void *type_data) 1723 { 1724 struct net_device *conduit = dsa_port_to_conduit(dsa_to_port(ds, port)); 1725 1726 if (!conduit->netdev_ops->ndo_setup_tc) 1727 return -EOPNOTSUPP; 1728 1729 return conduit->netdev_ops->ndo_setup_tc(conduit, TC_SETUP_FT, type_data); 1730 } 1731 1732 static int dsa_user_setup_tc(struct net_device *dev, enum tc_setup_type type, 1733 void *type_data) 1734 { 1735 struct dsa_port *dp = dsa_user_to_port(dev); 1736 struct dsa_switch *ds = dp->ds; 1737 1738 switch (type) { 1739 case TC_SETUP_BLOCK: 1740 return dsa_user_setup_tc_block(dev, type_data); 1741 case TC_SETUP_FT: 1742 return dsa_user_setup_ft_block(ds, dp->index, type_data); 1743 default: 1744 break; 1745 } 1746 1747 if (!ds->ops->port_setup_tc) 1748 return -EOPNOTSUPP; 1749 1750 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1751 } 1752 1753 static int dsa_user_get_rxnfc(struct net_device *dev, 1754 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1755 { 1756 struct dsa_port *dp = dsa_user_to_port(dev); 1757 struct dsa_switch *ds = dp->ds; 1758 1759 if (!ds->ops->get_rxnfc) 1760 return -EOPNOTSUPP; 1761 1762 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1763 } 1764 1765 static int dsa_user_set_rxnfc(struct net_device *dev, 1766 struct ethtool_rxnfc *nfc) 1767 { 1768 struct dsa_port *dp = dsa_user_to_port(dev); 1769 struct dsa_switch *ds = dp->ds; 1770 1771 if (!ds->ops->set_rxnfc) 1772 return -EOPNOTSUPP; 1773 1774 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1775 } 1776 1777 static int dsa_user_get_ts_info(struct net_device *dev, 1778 struct kernel_ethtool_ts_info *ts) 1779 { 1780 struct dsa_user_priv *p = netdev_priv(dev); 1781 struct dsa_switch *ds = p->dp->ds; 1782 1783 if (!ds->ops->get_ts_info) 1784 return -EOPNOTSUPP; 1785 1786 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1787 } 1788 1789 static int dsa_user_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1790 u16 vid) 1791 { 1792 struct dsa_port *dp = dsa_user_to_port(dev); 1793 struct switchdev_obj_port_vlan vlan = { 1794 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1795 .vid = vid, 1796 /* This API only allows programming tagged, non-PVID VIDs */ 1797 .flags = 0, 1798 }; 1799 struct netlink_ext_ack extack = {0}; 1800 struct dsa_switch *ds = dp->ds; 1801 struct netdev_hw_addr *ha; 1802 struct dsa_vlan *v; 1803 int ret; 1804 1805 /* User port... */ 1806 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1807 if (ret) { 1808 if (extack._msg) 1809 netdev_err(dev, "%s\n", extack._msg); 1810 return ret; 1811 } 1812 1813 /* And CPU port... */ 1814 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1815 if (ret) { 1816 if (extack._msg) 1817 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1818 extack._msg); 1819 return ret; 1820 } 1821 1822 if (!dsa_switch_supports_uc_filtering(ds) && 1823 !dsa_switch_supports_mc_filtering(ds)) 1824 return 0; 1825 1826 v = kzalloc(sizeof(*v), GFP_KERNEL); 1827 if (!v) { 1828 ret = -ENOMEM; 1829 goto rollback; 1830 } 1831 1832 netif_addr_lock_bh(dev); 1833 1834 v->vid = vid; 1835 list_add_tail(&v->list, &dp->user_vlans); 1836 1837 if (dsa_switch_supports_mc_filtering(ds)) { 1838 netdev_for_each_synced_mc_addr(ha, dev) { 1839 dsa_user_schedule_standalone_work(dev, DSA_MC_ADD, 1840 ha->addr, vid); 1841 } 1842 } 1843 1844 if (dsa_switch_supports_uc_filtering(ds)) { 1845 netdev_for_each_synced_uc_addr(ha, dev) { 1846 dsa_user_schedule_standalone_work(dev, DSA_UC_ADD, 1847 ha->addr, vid); 1848 } 1849 } 1850 1851 netif_addr_unlock_bh(dev); 1852 1853 dsa_flush_workqueue(); 1854 1855 return 0; 1856 1857 rollback: 1858 dsa_port_host_vlan_del(dp, &vlan); 1859 dsa_port_vlan_del(dp, &vlan); 1860 1861 return ret; 1862 } 1863 1864 static int dsa_user_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1865 u16 vid) 1866 { 1867 struct dsa_port *dp = dsa_user_to_port(dev); 1868 struct switchdev_obj_port_vlan vlan = { 1869 .vid = vid, 1870 /* This API only allows programming tagged, non-PVID VIDs */ 1871 .flags = 0, 1872 }; 1873 struct dsa_switch *ds = dp->ds; 1874 struct netdev_hw_addr *ha; 1875 struct dsa_vlan *v; 1876 int err; 1877 1878 err = dsa_port_vlan_del(dp, &vlan); 1879 if (err) 1880 return err; 1881 1882 err = dsa_port_host_vlan_del(dp, &vlan); 1883 if (err) 1884 return err; 1885 1886 if (!dsa_switch_supports_uc_filtering(ds) && 1887 !dsa_switch_supports_mc_filtering(ds)) 1888 return 0; 1889 1890 netif_addr_lock_bh(dev); 1891 1892 v = dsa_vlan_find(&dp->user_vlans, &vlan); 1893 if (!v) { 1894 netif_addr_unlock_bh(dev); 1895 return -ENOENT; 1896 } 1897 1898 list_del(&v->list); 1899 kfree(v); 1900 1901 if (dsa_switch_supports_mc_filtering(ds)) { 1902 netdev_for_each_synced_mc_addr(ha, dev) { 1903 dsa_user_schedule_standalone_work(dev, DSA_MC_DEL, 1904 ha->addr, vid); 1905 } 1906 } 1907 1908 if (dsa_switch_supports_uc_filtering(ds)) { 1909 netdev_for_each_synced_uc_addr(ha, dev) { 1910 dsa_user_schedule_standalone_work(dev, DSA_UC_DEL, 1911 ha->addr, vid); 1912 } 1913 } 1914 1915 netif_addr_unlock_bh(dev); 1916 1917 dsa_flush_workqueue(); 1918 1919 return 0; 1920 } 1921 1922 static int dsa_user_restore_vlan(struct net_device *vdev, int vid, void *arg) 1923 { 1924 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1925 1926 return dsa_user_vlan_rx_add_vid(arg, proto, vid); 1927 } 1928 1929 static int dsa_user_clear_vlan(struct net_device *vdev, int vid, void *arg) 1930 { 1931 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1932 1933 return dsa_user_vlan_rx_kill_vid(arg, proto, vid); 1934 } 1935 1936 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1937 * filtering is enabled. The baseline is that only ports that offload a 1938 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1939 * but there are exceptions for quirky hardware. 1940 * 1941 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1942 * the same switch with other ports that offload a VLAN-aware bridge are also 1943 * inevitably VLAN-aware. 1944 * 1945 * To summarize, a DSA switch port offloads: 1946 * 1947 * - If standalone (this includes software bridge, software LAG): 1948 * - if ds->needs_standalone_vlan_filtering = true, OR if 1949 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1950 * this switch chip which have vlan_filtering=1) 1951 * - the 8021q upper VLANs 1952 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1953 * global, or it is, but no port is under a VLAN-aware bridge): 1954 * - no VLAN (any 8021q upper is a software VLAN) 1955 * 1956 * - If under a vlan_filtering=0 bridge which it offload: 1957 * - if ds->configure_vlan_while_not_filtering = true (default): 1958 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1959 * - else (deprecated): 1960 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1961 * enabled, so this behavior is broken and discouraged. 1962 * 1963 * - If under a vlan_filtering=1 bridge which it offload: 1964 * - the bridge VLANs 1965 * - the 8021q upper VLANs 1966 */ 1967 int dsa_user_manage_vlan_filtering(struct net_device *user, 1968 bool vlan_filtering) 1969 { 1970 int err; 1971 1972 if (vlan_filtering) { 1973 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1974 1975 err = vlan_for_each(user, dsa_user_restore_vlan, user); 1976 if (err) { 1977 vlan_for_each(user, dsa_user_clear_vlan, user); 1978 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1979 return err; 1980 } 1981 } else { 1982 err = vlan_for_each(user, dsa_user_clear_vlan, user); 1983 if (err) 1984 return err; 1985 1986 user->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1987 } 1988 1989 return 0; 1990 } 1991 1992 struct dsa_hw_port { 1993 struct list_head list; 1994 struct net_device *dev; 1995 int old_mtu; 1996 }; 1997 1998 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1999 { 2000 const struct dsa_hw_port *p; 2001 int err; 2002 2003 list_for_each_entry(p, hw_port_list, list) { 2004 if (p->dev->mtu == mtu) 2005 continue; 2006 2007 err = dev_set_mtu(p->dev, mtu); 2008 if (err) 2009 goto rollback; 2010 } 2011 2012 return 0; 2013 2014 rollback: 2015 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 2016 if (p->dev->mtu == p->old_mtu) 2017 continue; 2018 2019 if (dev_set_mtu(p->dev, p->old_mtu)) 2020 netdev_err(p->dev, "Failed to restore MTU\n"); 2021 } 2022 2023 return err; 2024 } 2025 2026 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 2027 { 2028 struct dsa_hw_port *p, *n; 2029 2030 list_for_each_entry_safe(p, n, hw_port_list, list) 2031 kfree(p); 2032 } 2033 2034 /* Make the hardware datapath to/from @dev limited to a common MTU */ 2035 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 2036 { 2037 struct list_head hw_port_list; 2038 struct dsa_switch_tree *dst; 2039 int min_mtu = ETH_MAX_MTU; 2040 struct dsa_port *other_dp; 2041 int err; 2042 2043 if (!dp->ds->mtu_enforcement_ingress) 2044 return; 2045 2046 if (!dp->bridge) 2047 return; 2048 2049 INIT_LIST_HEAD(&hw_port_list); 2050 2051 /* Populate the list of ports that are part of the same bridge 2052 * as the newly added/modified port 2053 */ 2054 list_for_each_entry(dst, &dsa_tree_list, list) { 2055 list_for_each_entry(other_dp, &dst->ports, list) { 2056 struct dsa_hw_port *hw_port; 2057 struct net_device *user; 2058 2059 if (other_dp->type != DSA_PORT_TYPE_USER) 2060 continue; 2061 2062 if (!dsa_port_bridge_same(dp, other_dp)) 2063 continue; 2064 2065 if (!other_dp->ds->mtu_enforcement_ingress) 2066 continue; 2067 2068 user = other_dp->user; 2069 2070 if (min_mtu > user->mtu) 2071 min_mtu = user->mtu; 2072 2073 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 2074 if (!hw_port) 2075 goto out; 2076 2077 hw_port->dev = user; 2078 hw_port->old_mtu = user->mtu; 2079 2080 list_add(&hw_port->list, &hw_port_list); 2081 } 2082 } 2083 2084 /* Attempt to configure the entire hardware bridge to the newly added 2085 * interface's MTU first, regardless of whether the intention of the 2086 * user was to raise or lower it. 2087 */ 2088 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->user->mtu); 2089 if (!err) 2090 goto out; 2091 2092 /* Clearly that didn't work out so well, so just set the minimum MTU on 2093 * all hardware bridge ports now. If this fails too, then all ports will 2094 * still have their old MTU rolled back anyway. 2095 */ 2096 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 2097 2098 out: 2099 dsa_hw_port_list_free(&hw_port_list); 2100 } 2101 2102 int dsa_user_change_mtu(struct net_device *dev, int new_mtu) 2103 { 2104 struct net_device *conduit = dsa_user_to_conduit(dev); 2105 struct dsa_port *dp = dsa_user_to_port(dev); 2106 struct dsa_port *cpu_dp = dp->cpu_dp; 2107 struct dsa_switch *ds = dp->ds; 2108 struct dsa_port *other_dp; 2109 int largest_mtu = 0; 2110 int new_conduit_mtu; 2111 int old_conduit_mtu; 2112 int mtu_limit; 2113 int overhead; 2114 int cpu_mtu; 2115 int err; 2116 2117 if (!ds->ops->port_change_mtu) 2118 return -EOPNOTSUPP; 2119 2120 dsa_tree_for_each_user_port(other_dp, ds->dst) { 2121 int user_mtu; 2122 2123 /* During probe, this function will be called for each user 2124 * device, while not all of them have been allocated. That's 2125 * ok, it doesn't change what the maximum is, so ignore it. 2126 */ 2127 if (!other_dp->user) 2128 continue; 2129 2130 /* Pretend that we already applied the setting, which we 2131 * actually haven't (still haven't done all integrity checks) 2132 */ 2133 if (dp == other_dp) 2134 user_mtu = new_mtu; 2135 else 2136 user_mtu = other_dp->user->mtu; 2137 2138 if (largest_mtu < user_mtu) 2139 largest_mtu = user_mtu; 2140 } 2141 2142 overhead = dsa_tag_protocol_overhead(cpu_dp->tag_ops); 2143 mtu_limit = min_t(int, conduit->max_mtu, dev->max_mtu + overhead); 2144 old_conduit_mtu = conduit->mtu; 2145 new_conduit_mtu = largest_mtu + overhead; 2146 if (new_conduit_mtu > mtu_limit) 2147 return -ERANGE; 2148 2149 /* If the conduit MTU isn't over limit, there's no need to check the CPU 2150 * MTU, since that surely isn't either. 2151 */ 2152 cpu_mtu = largest_mtu; 2153 2154 /* Start applying stuff */ 2155 if (new_conduit_mtu != old_conduit_mtu) { 2156 err = dev_set_mtu(conduit, new_conduit_mtu); 2157 if (err < 0) 2158 goto out_conduit_failed; 2159 2160 /* We only need to propagate the MTU of the CPU port to 2161 * upstream switches, so emit a notifier which updates them. 2162 */ 2163 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 2164 if (err) 2165 goto out_cpu_failed; 2166 } 2167 2168 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 2169 if (err) 2170 goto out_port_failed; 2171 2172 WRITE_ONCE(dev->mtu, new_mtu); 2173 2174 dsa_bridge_mtu_normalization(dp); 2175 2176 return 0; 2177 2178 out_port_failed: 2179 if (new_conduit_mtu != old_conduit_mtu) 2180 dsa_port_mtu_change(cpu_dp, old_conduit_mtu - overhead); 2181 out_cpu_failed: 2182 if (new_conduit_mtu != old_conduit_mtu) 2183 dev_set_mtu(conduit, old_conduit_mtu); 2184 out_conduit_failed: 2185 return err; 2186 } 2187 2188 static int __maybe_unused 2189 dsa_user_dcbnl_set_apptrust(struct net_device *dev, u8 *sel, int nsel) 2190 { 2191 struct dsa_port *dp = dsa_user_to_port(dev); 2192 struct dsa_switch *ds = dp->ds; 2193 int port = dp->index; 2194 2195 if (!ds->ops->port_set_apptrust) 2196 return -EOPNOTSUPP; 2197 2198 return ds->ops->port_set_apptrust(ds, port, sel, nsel); 2199 } 2200 2201 static int __maybe_unused 2202 dsa_user_dcbnl_get_apptrust(struct net_device *dev, u8 *sel, int *nsel) 2203 { 2204 struct dsa_port *dp = dsa_user_to_port(dev); 2205 struct dsa_switch *ds = dp->ds; 2206 int port = dp->index; 2207 2208 if (!ds->ops->port_get_apptrust) 2209 return -EOPNOTSUPP; 2210 2211 return ds->ops->port_get_apptrust(ds, port, sel, nsel); 2212 } 2213 2214 static int __maybe_unused 2215 dsa_user_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 2216 { 2217 struct dsa_port *dp = dsa_user_to_port(dev); 2218 struct dsa_switch *ds = dp->ds; 2219 unsigned long mask, new_prio; 2220 int err, port = dp->index; 2221 2222 if (!ds->ops->port_set_default_prio) 2223 return -EOPNOTSUPP; 2224 2225 err = dcb_ieee_setapp(dev, app); 2226 if (err) 2227 return err; 2228 2229 mask = dcb_ieee_getapp_mask(dev, app); 2230 new_prio = __fls(mask); 2231 2232 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2233 if (err) { 2234 dcb_ieee_delapp(dev, app); 2235 return err; 2236 } 2237 2238 return 0; 2239 } 2240 2241 /* Update the DSCP prio entries on all user ports of the switch in case 2242 * the switch supports global DSCP prio instead of per port DSCP prios. 2243 */ 2244 static int dsa_user_dcbnl_ieee_global_dscp_setdel(struct net_device *dev, 2245 struct dcb_app *app, bool del) 2246 { 2247 int (*setdel)(struct net_device *dev, struct dcb_app *app); 2248 struct dsa_port *dp = dsa_user_to_port(dev); 2249 struct dsa_switch *ds = dp->ds; 2250 struct dsa_port *other_dp; 2251 int err, restore_err; 2252 2253 if (del) 2254 setdel = dcb_ieee_delapp; 2255 else 2256 setdel = dcb_ieee_setapp; 2257 2258 dsa_switch_for_each_user_port(other_dp, ds) { 2259 struct net_device *user = other_dp->user; 2260 2261 if (!user || user == dev) 2262 continue; 2263 2264 err = setdel(user, app); 2265 if (err) 2266 goto err_try_to_restore; 2267 } 2268 2269 return 0; 2270 2271 err_try_to_restore: 2272 2273 /* Revert logic to restore previous state of app entries */ 2274 if (!del) 2275 setdel = dcb_ieee_delapp; 2276 else 2277 setdel = dcb_ieee_setapp; 2278 2279 dsa_switch_for_each_user_port_continue_reverse(other_dp, ds) { 2280 struct net_device *user = other_dp->user; 2281 2282 if (!user || user == dev) 2283 continue; 2284 2285 restore_err = setdel(user, app); 2286 if (restore_err) 2287 netdev_err(user, "Failed to restore DSCP prio entry configuration\n"); 2288 } 2289 2290 return err; 2291 } 2292 2293 static int __maybe_unused 2294 dsa_user_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 2295 { 2296 struct dsa_port *dp = dsa_user_to_port(dev); 2297 struct dsa_switch *ds = dp->ds; 2298 unsigned long mask, new_prio; 2299 int err, port = dp->index; 2300 u8 dscp = app->protocol; 2301 2302 if (!ds->ops->port_add_dscp_prio) 2303 return -EOPNOTSUPP; 2304 2305 if (dscp >= 64) { 2306 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 2307 dscp); 2308 return -EINVAL; 2309 } 2310 2311 err = dcb_ieee_setapp(dev, app); 2312 if (err) 2313 return err; 2314 2315 mask = dcb_ieee_getapp_mask(dev, app); 2316 new_prio = __fls(mask); 2317 2318 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 2319 if (err) { 2320 dcb_ieee_delapp(dev, app); 2321 return err; 2322 } 2323 2324 if (!ds->dscp_prio_mapping_is_global) 2325 return 0; 2326 2327 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, false); 2328 if (err) { 2329 if (ds->ops->port_del_dscp_prio) 2330 ds->ops->port_del_dscp_prio(ds, port, dscp, new_prio); 2331 dcb_ieee_delapp(dev, app); 2332 return err; 2333 } 2334 2335 return 0; 2336 } 2337 2338 static int __maybe_unused dsa_user_dcbnl_ieee_setapp(struct net_device *dev, 2339 struct dcb_app *app) 2340 { 2341 switch (app->selector) { 2342 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2343 switch (app->protocol) { 2344 case 0: 2345 return dsa_user_dcbnl_set_default_prio(dev, app); 2346 default: 2347 return -EOPNOTSUPP; 2348 } 2349 break; 2350 case IEEE_8021QAZ_APP_SEL_DSCP: 2351 return dsa_user_dcbnl_add_dscp_prio(dev, app); 2352 default: 2353 return -EOPNOTSUPP; 2354 } 2355 } 2356 2357 static int __maybe_unused 2358 dsa_user_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2359 { 2360 struct dsa_port *dp = dsa_user_to_port(dev); 2361 struct dsa_switch *ds = dp->ds; 2362 unsigned long mask, new_prio; 2363 int err, port = dp->index; 2364 2365 if (!ds->ops->port_set_default_prio) 2366 return -EOPNOTSUPP; 2367 2368 err = dcb_ieee_delapp(dev, app); 2369 if (err) 2370 return err; 2371 2372 mask = dcb_ieee_getapp_mask(dev, app); 2373 new_prio = mask ? __fls(mask) : 0; 2374 2375 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2376 if (err) { 2377 dcb_ieee_setapp(dev, app); 2378 return err; 2379 } 2380 2381 return 0; 2382 } 2383 2384 static int __maybe_unused 2385 dsa_user_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2386 { 2387 struct dsa_port *dp = dsa_user_to_port(dev); 2388 struct dsa_switch *ds = dp->ds; 2389 int err, port = dp->index; 2390 u8 dscp = app->protocol; 2391 2392 if (!ds->ops->port_del_dscp_prio) 2393 return -EOPNOTSUPP; 2394 2395 err = dcb_ieee_delapp(dev, app); 2396 if (err) 2397 return err; 2398 2399 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2400 if (err) { 2401 dcb_ieee_setapp(dev, app); 2402 return err; 2403 } 2404 2405 if (!ds->dscp_prio_mapping_is_global) 2406 return 0; 2407 2408 err = dsa_user_dcbnl_ieee_global_dscp_setdel(dev, app, true); 2409 if (err) { 2410 if (ds->ops->port_add_dscp_prio) 2411 ds->ops->port_add_dscp_prio(ds, port, dscp, 2412 app->priority); 2413 dcb_ieee_setapp(dev, app); 2414 return err; 2415 } 2416 2417 return 0; 2418 } 2419 2420 static int __maybe_unused dsa_user_dcbnl_ieee_delapp(struct net_device *dev, 2421 struct dcb_app *app) 2422 { 2423 switch (app->selector) { 2424 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2425 switch (app->protocol) { 2426 case 0: 2427 return dsa_user_dcbnl_del_default_prio(dev, app); 2428 default: 2429 return -EOPNOTSUPP; 2430 } 2431 break; 2432 case IEEE_8021QAZ_APP_SEL_DSCP: 2433 return dsa_user_dcbnl_del_dscp_prio(dev, app); 2434 default: 2435 return -EOPNOTSUPP; 2436 } 2437 } 2438 2439 /* Pre-populate the DCB application priority table with the priorities 2440 * configured during switch setup, which we read from hardware here. 2441 */ 2442 static int dsa_user_dcbnl_init(struct net_device *dev) 2443 { 2444 struct dsa_port *dp = dsa_user_to_port(dev); 2445 struct dsa_switch *ds = dp->ds; 2446 int port = dp->index; 2447 int err; 2448 2449 if (ds->ops->port_get_default_prio) { 2450 int prio = ds->ops->port_get_default_prio(ds, port); 2451 struct dcb_app app = { 2452 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2453 .protocol = 0, 2454 .priority = prio, 2455 }; 2456 2457 if (prio < 0) 2458 return prio; 2459 2460 err = dcb_ieee_setapp(dev, &app); 2461 if (err) 2462 return err; 2463 } 2464 2465 if (ds->ops->port_get_dscp_prio) { 2466 int protocol; 2467 2468 for (protocol = 0; protocol < 64; protocol++) { 2469 struct dcb_app app = { 2470 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2471 .protocol = protocol, 2472 }; 2473 int prio; 2474 2475 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2476 if (prio == -EOPNOTSUPP) 2477 continue; 2478 if (prio < 0) 2479 return prio; 2480 2481 app.priority = prio; 2482 2483 err = dcb_ieee_setapp(dev, &app); 2484 if (err) 2485 return err; 2486 } 2487 } 2488 2489 return 0; 2490 } 2491 2492 static const struct ethtool_ops dsa_user_ethtool_ops = { 2493 .get_drvinfo = dsa_user_get_drvinfo, 2494 .get_regs_len = dsa_user_get_regs_len, 2495 .get_regs = dsa_user_get_regs, 2496 .nway_reset = dsa_user_nway_reset, 2497 .get_link = ethtool_op_get_link, 2498 .get_eeprom_len = dsa_user_get_eeprom_len, 2499 .get_eeprom = dsa_user_get_eeprom, 2500 .set_eeprom = dsa_user_set_eeprom, 2501 .get_strings = dsa_user_get_strings, 2502 .get_ethtool_stats = dsa_user_get_ethtool_stats, 2503 .get_sset_count = dsa_user_get_sset_count, 2504 .get_eth_phy_stats = dsa_user_get_eth_phy_stats, 2505 .get_eth_mac_stats = dsa_user_get_eth_mac_stats, 2506 .get_eth_ctrl_stats = dsa_user_get_eth_ctrl_stats, 2507 .get_rmon_stats = dsa_user_get_rmon_stats, 2508 .get_ts_stats = dsa_user_get_ts_stats, 2509 .set_wol = dsa_user_set_wol, 2510 .get_wol = dsa_user_get_wol, 2511 .set_eee = dsa_user_set_eee, 2512 .get_eee = dsa_user_get_eee, 2513 .get_link_ksettings = dsa_user_get_link_ksettings, 2514 .set_link_ksettings = dsa_user_set_link_ksettings, 2515 .get_pause_stats = dsa_user_get_pause_stats, 2516 .get_pauseparam = dsa_user_get_pauseparam, 2517 .set_pauseparam = dsa_user_set_pauseparam, 2518 .get_rxnfc = dsa_user_get_rxnfc, 2519 .set_rxnfc = dsa_user_set_rxnfc, 2520 .get_ts_info = dsa_user_get_ts_info, 2521 .self_test = dsa_user_net_selftest, 2522 .get_mm = dsa_user_get_mm, 2523 .set_mm = dsa_user_set_mm, 2524 .get_mm_stats = dsa_user_get_mm_stats, 2525 }; 2526 2527 static const struct dcbnl_rtnl_ops __maybe_unused dsa_user_dcbnl_ops = { 2528 .ieee_setapp = dsa_user_dcbnl_ieee_setapp, 2529 .ieee_delapp = dsa_user_dcbnl_ieee_delapp, 2530 .dcbnl_setapptrust = dsa_user_dcbnl_set_apptrust, 2531 .dcbnl_getapptrust = dsa_user_dcbnl_get_apptrust, 2532 }; 2533 2534 static void dsa_user_get_stats64(struct net_device *dev, 2535 struct rtnl_link_stats64 *s) 2536 { 2537 struct dsa_port *dp = dsa_user_to_port(dev); 2538 struct dsa_switch *ds = dp->ds; 2539 2540 if (ds->ops->get_stats64) 2541 ds->ops->get_stats64(ds, dp->index, s); 2542 else 2543 dev_get_tstats64(dev, s); 2544 } 2545 2546 static int dsa_user_fill_forward_path(struct net_device_path_ctx *ctx, 2547 struct net_device_path *path) 2548 { 2549 struct dsa_port *dp = dsa_user_to_port(ctx->dev); 2550 struct net_device *conduit = dsa_port_to_conduit(dp); 2551 struct dsa_port *cpu_dp = dp->cpu_dp; 2552 2553 path->dev = ctx->dev; 2554 path->type = DEV_PATH_DSA; 2555 path->dsa.proto = cpu_dp->tag_ops->proto; 2556 path->dsa.port = dp->index; 2557 ctx->dev = conduit; 2558 2559 return 0; 2560 } 2561 2562 static int dsa_user_hwtstamp_get(struct net_device *dev, 2563 struct kernel_hwtstamp_config *cfg) 2564 { 2565 struct dsa_port *dp = dsa_user_to_port(dev); 2566 struct dsa_switch *ds = dp->ds; 2567 2568 if (!ds->ops->port_hwtstamp_get) 2569 return -EOPNOTSUPP; 2570 2571 return ds->ops->port_hwtstamp_get(ds, dp->index, cfg); 2572 } 2573 2574 static int dsa_user_hwtstamp_set(struct net_device *dev, 2575 struct kernel_hwtstamp_config *cfg, 2576 struct netlink_ext_ack *extack) 2577 { 2578 struct dsa_port *dp = dsa_user_to_port(dev); 2579 struct dsa_switch *ds = dp->ds; 2580 2581 if (!ds->ops->port_hwtstamp_set) 2582 return -EOPNOTSUPP; 2583 2584 return ds->ops->port_hwtstamp_set(ds, dp->index, cfg, extack); 2585 } 2586 2587 static const struct net_device_ops dsa_user_netdev_ops = { 2588 .ndo_open = dsa_user_open, 2589 .ndo_stop = dsa_user_close, 2590 .ndo_start_xmit = dsa_user_xmit, 2591 .ndo_change_rx_flags = dsa_user_change_rx_flags, 2592 .ndo_set_rx_mode = dsa_user_set_rx_mode, 2593 .ndo_set_mac_address = dsa_user_set_mac_address, 2594 .ndo_fdb_dump = dsa_user_fdb_dump, 2595 .ndo_eth_ioctl = dsa_user_ioctl, 2596 .ndo_get_iflink = dsa_user_get_iflink, 2597 #ifdef CONFIG_NET_POLL_CONTROLLER 2598 .ndo_netpoll_setup = dsa_user_netpoll_setup, 2599 .ndo_netpoll_cleanup = dsa_user_netpoll_cleanup, 2600 .ndo_poll_controller = dsa_user_poll_controller, 2601 #endif 2602 .ndo_setup_tc = dsa_user_setup_tc, 2603 .ndo_get_stats64 = dsa_user_get_stats64, 2604 .ndo_vlan_rx_add_vid = dsa_user_vlan_rx_add_vid, 2605 .ndo_vlan_rx_kill_vid = dsa_user_vlan_rx_kill_vid, 2606 .ndo_change_mtu = dsa_user_change_mtu, 2607 .ndo_fill_forward_path = dsa_user_fill_forward_path, 2608 .ndo_hwtstamp_get = dsa_user_hwtstamp_get, 2609 .ndo_hwtstamp_set = dsa_user_hwtstamp_set, 2610 }; 2611 2612 static const struct device_type dsa_type = { 2613 .name = "dsa", 2614 }; 2615 2616 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2617 { 2618 const struct dsa_port *dp = dsa_to_port(ds, port); 2619 2620 if (dp->pl) 2621 phylink_mac_change(dp->pl, up); 2622 } 2623 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2624 2625 static void dsa_user_phylink_fixed_state(struct phylink_config *config, 2626 struct phylink_link_state *state) 2627 { 2628 struct dsa_port *dp = dsa_phylink_to_port(config); 2629 struct dsa_switch *ds = dp->ds; 2630 2631 /* No need to check that this operation is valid, the callback would 2632 * not be called if it was not. 2633 */ 2634 ds->ops->phylink_fixed_state(ds, dp->index, state); 2635 } 2636 2637 /* user device setup *******************************************************/ 2638 static int dsa_user_phy_connect(struct net_device *user_dev, int addr, 2639 u32 flags) 2640 { 2641 struct dsa_port *dp = dsa_user_to_port(user_dev); 2642 struct dsa_switch *ds = dp->ds; 2643 2644 user_dev->phydev = mdiobus_get_phy(ds->user_mii_bus, addr); 2645 if (!user_dev->phydev) { 2646 netdev_err(user_dev, "no phy at %d\n", addr); 2647 return -ENODEV; 2648 } 2649 2650 user_dev->phydev->dev_flags |= flags; 2651 2652 return phylink_connect_phy(dp->pl, user_dev->phydev); 2653 } 2654 2655 static int dsa_user_phy_setup(struct net_device *user_dev) 2656 { 2657 struct dsa_port *dp = dsa_user_to_port(user_dev); 2658 struct device_node *port_dn = dp->dn; 2659 struct dsa_switch *ds = dp->ds; 2660 u32 phy_flags = 0; 2661 int ret; 2662 2663 dp->pl_config.dev = &user_dev->dev; 2664 dp->pl_config.type = PHYLINK_NETDEV; 2665 2666 /* The get_fixed_state callback takes precedence over polling the 2667 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2668 * this if the switch provides such a callback. 2669 */ 2670 if (ds->ops->phylink_fixed_state) { 2671 dp->pl_config.get_fixed_state = dsa_user_phylink_fixed_state; 2672 dp->pl_config.poll_fixed_state = true; 2673 } 2674 2675 ret = dsa_port_phylink_create(dp); 2676 if (ret) 2677 return ret; 2678 2679 if (ds->ops->get_phy_flags) 2680 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2681 2682 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2683 if (ret == -ENODEV && ds->user_mii_bus) { 2684 /* We could not connect to a designated PHY or SFP, so try to 2685 * use the switch internal MDIO bus instead 2686 */ 2687 ret = dsa_user_phy_connect(user_dev, dp->index, phy_flags); 2688 } 2689 if (ret) { 2690 netdev_err(user_dev, "failed to connect to PHY: %pe\n", 2691 ERR_PTR(ret)); 2692 dsa_port_phylink_destroy(dp); 2693 } 2694 2695 return ret; 2696 } 2697 2698 void dsa_user_setup_tagger(struct net_device *user) 2699 { 2700 struct dsa_port *dp = dsa_user_to_port(user); 2701 struct net_device *conduit = dsa_port_to_conduit(dp); 2702 struct dsa_user_priv *p = netdev_priv(user); 2703 const struct dsa_port *cpu_dp = dp->cpu_dp; 2704 const struct dsa_switch *ds = dp->ds; 2705 2706 user->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2707 user->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2708 /* Try to save one extra realloc later in the TX path (in the conduit) 2709 * by also inheriting the conduit's needed headroom and tailroom. 2710 * The 8021q driver also does this. 2711 */ 2712 user->needed_headroom += conduit->needed_headroom; 2713 user->needed_tailroom += conduit->needed_tailroom; 2714 2715 p->xmit = cpu_dp->tag_ops->xmit; 2716 2717 user->features = conduit->vlan_features | NETIF_F_HW_TC; 2718 user->hw_features |= NETIF_F_HW_TC; 2719 if (user->needed_tailroom) 2720 user->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2721 if (ds->needs_standalone_vlan_filtering) 2722 user->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2723 2724 user->lltx = true; 2725 } 2726 2727 int dsa_user_suspend(struct net_device *user_dev) 2728 { 2729 struct dsa_port *dp = dsa_user_to_port(user_dev); 2730 2731 if (!netif_running(user_dev)) 2732 return 0; 2733 2734 netif_device_detach(user_dev); 2735 2736 rtnl_lock(); 2737 phylink_stop(dp->pl); 2738 rtnl_unlock(); 2739 2740 return 0; 2741 } 2742 2743 int dsa_user_resume(struct net_device *user_dev) 2744 { 2745 struct dsa_port *dp = dsa_user_to_port(user_dev); 2746 2747 if (!netif_running(user_dev)) 2748 return 0; 2749 2750 netif_device_attach(user_dev); 2751 2752 rtnl_lock(); 2753 phylink_start(dp->pl); 2754 rtnl_unlock(); 2755 2756 return 0; 2757 } 2758 2759 int dsa_user_create(struct dsa_port *port) 2760 { 2761 struct net_device *conduit = dsa_port_to_conduit(port); 2762 struct dsa_switch *ds = port->ds; 2763 struct net_device *user_dev; 2764 struct dsa_user_priv *p; 2765 const char *name; 2766 int assign_type; 2767 int ret; 2768 2769 if (!ds->num_tx_queues) 2770 ds->num_tx_queues = 1; 2771 2772 if (port->name) { 2773 name = port->name; 2774 assign_type = NET_NAME_PREDICTABLE; 2775 } else { 2776 name = "eth%d"; 2777 assign_type = NET_NAME_ENUM; 2778 } 2779 2780 user_dev = alloc_netdev_mqs(sizeof(struct dsa_user_priv), name, 2781 assign_type, ether_setup, 2782 ds->num_tx_queues, 1); 2783 if (user_dev == NULL) 2784 return -ENOMEM; 2785 2786 user_dev->rtnl_link_ops = &dsa_link_ops; 2787 user_dev->ethtool_ops = &dsa_user_ethtool_ops; 2788 #if IS_ENABLED(CONFIG_DCB) 2789 user_dev->dcbnl_ops = &dsa_user_dcbnl_ops; 2790 #endif 2791 if (!is_zero_ether_addr(port->mac)) 2792 eth_hw_addr_set(user_dev, port->mac); 2793 else 2794 eth_hw_addr_inherit(user_dev, conduit); 2795 user_dev->priv_flags |= IFF_NO_QUEUE; 2796 if (dsa_switch_supports_uc_filtering(ds)) 2797 user_dev->priv_flags |= IFF_UNICAST_FLT; 2798 user_dev->netdev_ops = &dsa_user_netdev_ops; 2799 if (ds->ops->port_max_mtu) 2800 user_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2801 SET_NETDEV_DEVTYPE(user_dev, &dsa_type); 2802 2803 SET_NETDEV_DEV(user_dev, port->ds->dev); 2804 SET_NETDEV_DEVLINK_PORT(user_dev, &port->devlink_port); 2805 user_dev->dev.of_node = port->dn; 2806 user_dev->vlan_features = conduit->vlan_features; 2807 2808 p = netdev_priv(user_dev); 2809 user_dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS; 2810 2811 ret = gro_cells_init(&p->gcells, user_dev); 2812 if (ret) 2813 goto out_free; 2814 2815 p->dp = port; 2816 INIT_LIST_HEAD(&p->mall_tc_list); 2817 port->user = user_dev; 2818 dsa_user_setup_tagger(user_dev); 2819 2820 netif_carrier_off(user_dev); 2821 2822 ret = dsa_user_phy_setup(user_dev); 2823 if (ret) { 2824 netdev_err(user_dev, 2825 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2826 ret, ds->dst->index, ds->index, port->index); 2827 goto out_gcells; 2828 } 2829 2830 rtnl_lock(); 2831 2832 ret = dsa_user_change_mtu(user_dev, ETH_DATA_LEN); 2833 if (ret && ret != -EOPNOTSUPP) 2834 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2835 ret, ETH_DATA_LEN, port->index); 2836 2837 ret = register_netdevice(user_dev); 2838 if (ret) { 2839 netdev_err(conduit, "error %d registering interface %s\n", 2840 ret, user_dev->name); 2841 rtnl_unlock(); 2842 goto out_phy; 2843 } 2844 2845 if (IS_ENABLED(CONFIG_DCB)) { 2846 ret = dsa_user_dcbnl_init(user_dev); 2847 if (ret) { 2848 netdev_err(user_dev, 2849 "failed to initialize DCB: %pe\n", 2850 ERR_PTR(ret)); 2851 rtnl_unlock(); 2852 goto out_unregister; 2853 } 2854 } 2855 2856 ret = netdev_upper_dev_link(conduit, user_dev, NULL); 2857 2858 rtnl_unlock(); 2859 2860 if (ret) 2861 goto out_unregister; 2862 2863 return 0; 2864 2865 out_unregister: 2866 unregister_netdev(user_dev); 2867 out_phy: 2868 rtnl_lock(); 2869 phylink_disconnect_phy(p->dp->pl); 2870 rtnl_unlock(); 2871 dsa_port_phylink_destroy(p->dp); 2872 out_gcells: 2873 gro_cells_destroy(&p->gcells); 2874 out_free: 2875 free_netdev(user_dev); 2876 port->user = NULL; 2877 return ret; 2878 } 2879 2880 void dsa_user_destroy(struct net_device *user_dev) 2881 { 2882 struct net_device *conduit = dsa_user_to_conduit(user_dev); 2883 struct dsa_port *dp = dsa_user_to_port(user_dev); 2884 struct dsa_user_priv *p = netdev_priv(user_dev); 2885 2886 netif_carrier_off(user_dev); 2887 rtnl_lock(); 2888 netdev_upper_dev_unlink(conduit, user_dev); 2889 unregister_netdevice(user_dev); 2890 phylink_disconnect_phy(dp->pl); 2891 rtnl_unlock(); 2892 2893 dsa_port_phylink_destroy(dp); 2894 gro_cells_destroy(&p->gcells); 2895 free_netdev(user_dev); 2896 } 2897 2898 int dsa_user_change_conduit(struct net_device *dev, struct net_device *conduit, 2899 struct netlink_ext_ack *extack) 2900 { 2901 struct net_device *old_conduit = dsa_user_to_conduit(dev); 2902 struct dsa_port *dp = dsa_user_to_port(dev); 2903 struct dsa_switch *ds = dp->ds; 2904 struct net_device *upper; 2905 struct list_head *iter; 2906 int err; 2907 2908 if (conduit == old_conduit) 2909 return 0; 2910 2911 if (!ds->ops->port_change_conduit) { 2912 NL_SET_ERR_MSG_MOD(extack, 2913 "Driver does not support changing DSA conduit"); 2914 return -EOPNOTSUPP; 2915 } 2916 2917 if (!netdev_uses_dsa(conduit)) { 2918 NL_SET_ERR_MSG_MOD(extack, 2919 "Interface not eligible as DSA conduit"); 2920 return -EOPNOTSUPP; 2921 } 2922 2923 netdev_for_each_upper_dev_rcu(conduit, upper, iter) { 2924 if (dsa_user_dev_check(upper)) 2925 continue; 2926 if (netif_is_bridge_master(upper)) 2927 continue; 2928 NL_SET_ERR_MSG_MOD(extack, "Cannot join conduit with unknown uppers"); 2929 return -EOPNOTSUPP; 2930 } 2931 2932 /* Since we allow live-changing the DSA conduit, plus we auto-open the 2933 * DSA conduit when the user port opens => we need to ensure that the 2934 * new DSA conduit is open too. 2935 */ 2936 if (dev->flags & IFF_UP) { 2937 err = dev_open(conduit, extack); 2938 if (err) 2939 return err; 2940 } 2941 2942 netdev_upper_dev_unlink(old_conduit, dev); 2943 2944 err = netdev_upper_dev_link(conduit, dev, extack); 2945 if (err) 2946 goto out_revert_old_conduit_unlink; 2947 2948 err = dsa_port_change_conduit(dp, conduit, extack); 2949 if (err) 2950 goto out_revert_conduit_link; 2951 2952 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2953 err = dsa_user_change_mtu(dev, dev->mtu); 2954 if (err && err != -EOPNOTSUPP) { 2955 netdev_warn(dev, 2956 "nonfatal error updating MTU with new conduit: %pe\n", 2957 ERR_PTR(err)); 2958 } 2959 2960 return 0; 2961 2962 out_revert_conduit_link: 2963 netdev_upper_dev_unlink(conduit, dev); 2964 out_revert_old_conduit_unlink: 2965 netdev_upper_dev_link(old_conduit, dev, NULL); 2966 return err; 2967 } 2968 2969 bool dsa_user_dev_check(const struct net_device *dev) 2970 { 2971 return dev->netdev_ops == &dsa_user_netdev_ops; 2972 } 2973 EXPORT_SYMBOL_GPL(dsa_user_dev_check); 2974 2975 static int dsa_user_changeupper(struct net_device *dev, 2976 struct netdev_notifier_changeupper_info *info) 2977 { 2978 struct netlink_ext_ack *extack; 2979 int err = NOTIFY_DONE; 2980 struct dsa_port *dp; 2981 2982 if (!dsa_user_dev_check(dev)) 2983 return err; 2984 2985 dp = dsa_user_to_port(dev); 2986 extack = netdev_notifier_info_to_extack(&info->info); 2987 2988 if (netif_is_bridge_master(info->upper_dev)) { 2989 if (info->linking) { 2990 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2991 if (!err) 2992 dsa_bridge_mtu_normalization(dp); 2993 if (err == -EOPNOTSUPP) { 2994 NL_SET_ERR_MSG_WEAK_MOD(extack, 2995 "Offloading not supported"); 2996 err = 0; 2997 } 2998 err = notifier_from_errno(err); 2999 } else { 3000 dsa_port_bridge_leave(dp, info->upper_dev); 3001 err = NOTIFY_OK; 3002 } 3003 } else if (netif_is_lag_master(info->upper_dev)) { 3004 if (info->linking) { 3005 err = dsa_port_lag_join(dp, info->upper_dev, 3006 info->upper_info, extack); 3007 if (err == -EOPNOTSUPP) { 3008 NL_SET_ERR_MSG_WEAK_MOD(extack, 3009 "Offloading not supported"); 3010 err = 0; 3011 } 3012 err = notifier_from_errno(err); 3013 } else { 3014 dsa_port_lag_leave(dp, info->upper_dev); 3015 err = NOTIFY_OK; 3016 } 3017 } else if (is_hsr_master(info->upper_dev)) { 3018 if (info->linking) { 3019 err = dsa_port_hsr_join(dp, info->upper_dev, extack); 3020 if (err == -EOPNOTSUPP) { 3021 NL_SET_ERR_MSG_WEAK_MOD(extack, 3022 "Offloading not supported"); 3023 err = 0; 3024 } 3025 err = notifier_from_errno(err); 3026 } else { 3027 dsa_port_hsr_leave(dp, info->upper_dev); 3028 err = NOTIFY_OK; 3029 } 3030 } 3031 3032 return err; 3033 } 3034 3035 static int dsa_user_prechangeupper(struct net_device *dev, 3036 struct netdev_notifier_changeupper_info *info) 3037 { 3038 struct dsa_port *dp; 3039 3040 if (!dsa_user_dev_check(dev)) 3041 return NOTIFY_DONE; 3042 3043 dp = dsa_user_to_port(dev); 3044 3045 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 3046 dsa_port_pre_bridge_leave(dp, info->upper_dev); 3047 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 3048 dsa_port_pre_lag_leave(dp, info->upper_dev); 3049 /* dsa_port_pre_hsr_leave is not yet necessary since hsr devices cannot 3050 * meaningfully placed under a bridge yet 3051 */ 3052 3053 return NOTIFY_DONE; 3054 } 3055 3056 static int 3057 dsa_user_lag_changeupper(struct net_device *dev, 3058 struct netdev_notifier_changeupper_info *info) 3059 { 3060 struct net_device *lower; 3061 struct list_head *iter; 3062 int err = NOTIFY_DONE; 3063 struct dsa_port *dp; 3064 3065 if (!netif_is_lag_master(dev)) 3066 return err; 3067 3068 netdev_for_each_lower_dev(dev, lower, iter) { 3069 if (!dsa_user_dev_check(lower)) 3070 continue; 3071 3072 dp = dsa_user_to_port(lower); 3073 if (!dp->lag) 3074 /* Software LAG */ 3075 continue; 3076 3077 err = dsa_user_changeupper(lower, info); 3078 if (notifier_to_errno(err)) 3079 break; 3080 } 3081 3082 return err; 3083 } 3084 3085 /* Same as dsa_user_lag_changeupper() except that it calls 3086 * dsa_user_prechangeupper() 3087 */ 3088 static int 3089 dsa_user_lag_prechangeupper(struct net_device *dev, 3090 struct netdev_notifier_changeupper_info *info) 3091 { 3092 struct net_device *lower; 3093 struct list_head *iter; 3094 int err = NOTIFY_DONE; 3095 struct dsa_port *dp; 3096 3097 if (!netif_is_lag_master(dev)) 3098 return err; 3099 3100 netdev_for_each_lower_dev(dev, lower, iter) { 3101 if (!dsa_user_dev_check(lower)) 3102 continue; 3103 3104 dp = dsa_user_to_port(lower); 3105 if (!dp->lag) 3106 /* Software LAG */ 3107 continue; 3108 3109 err = dsa_user_prechangeupper(lower, info); 3110 if (notifier_to_errno(err)) 3111 break; 3112 } 3113 3114 return err; 3115 } 3116 3117 static int 3118 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 3119 struct netdev_notifier_changeupper_info *info) 3120 { 3121 struct netlink_ext_ack *ext_ack; 3122 struct net_device *user, *br; 3123 struct dsa_port *dp; 3124 3125 ext_ack = netdev_notifier_info_to_extack(&info->info); 3126 3127 if (!is_vlan_dev(dev)) 3128 return NOTIFY_DONE; 3129 3130 user = vlan_dev_real_dev(dev); 3131 if (!dsa_user_dev_check(user)) 3132 return NOTIFY_DONE; 3133 3134 dp = dsa_user_to_port(user); 3135 br = dsa_port_bridge_dev_get(dp); 3136 if (!br) 3137 return NOTIFY_DONE; 3138 3139 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 3140 if (br_vlan_enabled(br) && 3141 netif_is_bridge_master(info->upper_dev) && info->linking) { 3142 NL_SET_ERR_MSG_MOD(ext_ack, 3143 "Cannot make VLAN device join VLAN-aware bridge"); 3144 return notifier_from_errno(-EINVAL); 3145 } 3146 3147 return NOTIFY_DONE; 3148 } 3149 3150 static int 3151 dsa_user_check_8021q_upper(struct net_device *dev, 3152 struct netdev_notifier_changeupper_info *info) 3153 { 3154 struct dsa_port *dp = dsa_user_to_port(dev); 3155 struct net_device *br = dsa_port_bridge_dev_get(dp); 3156 struct bridge_vlan_info br_info; 3157 struct netlink_ext_ack *extack; 3158 int err = NOTIFY_DONE; 3159 u16 vid; 3160 3161 if (!br || !br_vlan_enabled(br)) 3162 return NOTIFY_DONE; 3163 3164 extack = netdev_notifier_info_to_extack(&info->info); 3165 vid = vlan_dev_vlan_id(info->upper_dev); 3166 3167 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 3168 * device, respectively the VID is not found, returning 3169 * 0 means success, which is a failure for us here. 3170 */ 3171 err = br_vlan_get_info(br, vid, &br_info); 3172 if (err == 0) { 3173 NL_SET_ERR_MSG_MOD(extack, 3174 "This VLAN is already configured by the bridge"); 3175 return notifier_from_errno(-EBUSY); 3176 } 3177 3178 return NOTIFY_DONE; 3179 } 3180 3181 static int 3182 dsa_user_prechangeupper_sanity_check(struct net_device *dev, 3183 struct netdev_notifier_changeupper_info *info) 3184 { 3185 struct dsa_switch *ds; 3186 struct dsa_port *dp; 3187 int err; 3188 3189 if (!dsa_user_dev_check(dev)) 3190 return dsa_prevent_bridging_8021q_upper(dev, info); 3191 3192 dp = dsa_user_to_port(dev); 3193 ds = dp->ds; 3194 3195 if (ds->ops->port_prechangeupper) { 3196 err = ds->ops->port_prechangeupper(ds, dp->index, info); 3197 if (err) 3198 return notifier_from_errno(err); 3199 } 3200 3201 if (is_vlan_dev(info->upper_dev)) 3202 return dsa_user_check_8021q_upper(dev, info); 3203 3204 return NOTIFY_DONE; 3205 } 3206 3207 /* To be eligible as a DSA conduit, a LAG must have all lower interfaces be 3208 * eligible DSA conduits. Additionally, all LAG slaves must be DSA conduits of 3209 * switches in the same switch tree. 3210 */ 3211 static int dsa_lag_conduit_validate(struct net_device *lag_dev, 3212 struct netlink_ext_ack *extack) 3213 { 3214 struct net_device *lower1, *lower2; 3215 struct list_head *iter1, *iter2; 3216 3217 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 3218 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 3219 if (!netdev_uses_dsa(lower1) || 3220 !netdev_uses_dsa(lower2)) { 3221 NL_SET_ERR_MSG_MOD(extack, 3222 "All LAG ports must be eligible as DSA conduits"); 3223 return notifier_from_errno(-EINVAL); 3224 } 3225 3226 if (lower1 == lower2) 3227 continue; 3228 3229 if (!dsa_port_tree_same(lower1->dsa_ptr, 3230 lower2->dsa_ptr)) { 3231 NL_SET_ERR_MSG_MOD(extack, 3232 "LAG contains DSA conduits of disjoint switch trees"); 3233 return notifier_from_errno(-EINVAL); 3234 } 3235 } 3236 } 3237 3238 return NOTIFY_DONE; 3239 } 3240 3241 static int 3242 dsa_conduit_prechangeupper_sanity_check(struct net_device *conduit, 3243 struct netdev_notifier_changeupper_info *info) 3244 { 3245 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3246 3247 if (!netdev_uses_dsa(conduit)) 3248 return NOTIFY_DONE; 3249 3250 if (!info->linking) 3251 return NOTIFY_DONE; 3252 3253 /* Allow DSA switch uppers */ 3254 if (dsa_user_dev_check(info->upper_dev)) 3255 return NOTIFY_DONE; 3256 3257 /* Allow bridge uppers of DSA conduits, subject to further 3258 * restrictions in dsa_bridge_prechangelower_sanity_check() 3259 */ 3260 if (netif_is_bridge_master(info->upper_dev)) 3261 return NOTIFY_DONE; 3262 3263 /* Allow LAG uppers, subject to further restrictions in 3264 * dsa_lag_conduit_prechangelower_sanity_check() 3265 */ 3266 if (netif_is_lag_master(info->upper_dev)) 3267 return dsa_lag_conduit_validate(info->upper_dev, extack); 3268 3269 NL_SET_ERR_MSG_MOD(extack, 3270 "DSA conduit cannot join unknown upper interfaces"); 3271 return notifier_from_errno(-EBUSY); 3272 } 3273 3274 static int 3275 dsa_lag_conduit_prechangelower_sanity_check(struct net_device *dev, 3276 struct netdev_notifier_changeupper_info *info) 3277 { 3278 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 3279 struct net_device *lag_dev = info->upper_dev; 3280 struct net_device *lower; 3281 struct list_head *iter; 3282 3283 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 3284 return NOTIFY_DONE; 3285 3286 if (!info->linking) 3287 return NOTIFY_DONE; 3288 3289 if (!netdev_uses_dsa(dev)) { 3290 NL_SET_ERR_MSG(extack, 3291 "Only DSA conduits can join a LAG DSA conduit"); 3292 return notifier_from_errno(-EINVAL); 3293 } 3294 3295 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3296 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 3297 NL_SET_ERR_MSG(extack, 3298 "Interface is DSA conduit for a different switch tree than this LAG"); 3299 return notifier_from_errno(-EINVAL); 3300 } 3301 3302 break; 3303 } 3304 3305 return NOTIFY_DONE; 3306 } 3307 3308 /* Don't allow bridging of DSA conduits, since the bridge layer rx_handler 3309 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 3310 * chance to strip off and parse the DSA switch tag protocol header (the bridge 3311 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 3312 * frames). 3313 * The only case where that would not be an issue is when bridging can already 3314 * be offloaded, such as when the DSA conduit is itself a DSA or plain switchdev 3315 * port, and is bridged only with other ports from the same hardware device. 3316 */ 3317 static int 3318 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 3319 struct netdev_notifier_changeupper_info *info) 3320 { 3321 struct net_device *br = info->upper_dev; 3322 struct netlink_ext_ack *extack; 3323 struct net_device *lower; 3324 struct list_head *iter; 3325 3326 if (!netif_is_bridge_master(br)) 3327 return NOTIFY_DONE; 3328 3329 if (!info->linking) 3330 return NOTIFY_DONE; 3331 3332 extack = netdev_notifier_info_to_extack(&info->info); 3333 3334 netdev_for_each_lower_dev(br, lower, iter) { 3335 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 3336 continue; 3337 3338 if (!netdev_port_same_parent_id(lower, new_lower)) { 3339 NL_SET_ERR_MSG(extack, 3340 "Cannot do software bridging with a DSA conduit"); 3341 return notifier_from_errno(-EINVAL); 3342 } 3343 } 3344 3345 return NOTIFY_DONE; 3346 } 3347 3348 static void dsa_tree_migrate_ports_from_lag_conduit(struct dsa_switch_tree *dst, 3349 struct net_device *lag_dev) 3350 { 3351 struct net_device *new_conduit = dsa_tree_find_first_conduit(dst); 3352 struct dsa_port *dp; 3353 int err; 3354 3355 dsa_tree_for_each_user_port(dp, dst) { 3356 if (dsa_port_to_conduit(dp) != lag_dev) 3357 continue; 3358 3359 err = dsa_user_change_conduit(dp->user, new_conduit, NULL); 3360 if (err) { 3361 netdev_err(dp->user, 3362 "failed to restore conduit to %s: %pe\n", 3363 new_conduit->name, ERR_PTR(err)); 3364 } 3365 } 3366 } 3367 3368 static int dsa_conduit_lag_join(struct net_device *conduit, 3369 struct net_device *lag_dev, 3370 struct netdev_lag_upper_info *uinfo, 3371 struct netlink_ext_ack *extack) 3372 { 3373 struct dsa_port *cpu_dp = conduit->dsa_ptr; 3374 struct dsa_switch_tree *dst = cpu_dp->dst; 3375 struct dsa_port *dp; 3376 int err; 3377 3378 err = dsa_conduit_lag_setup(lag_dev, cpu_dp, uinfo, extack); 3379 if (err) 3380 return err; 3381 3382 dsa_tree_for_each_user_port(dp, dst) { 3383 if (dsa_port_to_conduit(dp) != conduit) 3384 continue; 3385 3386 err = dsa_user_change_conduit(dp->user, lag_dev, extack); 3387 if (err) 3388 goto restore; 3389 } 3390 3391 return 0; 3392 3393 restore: 3394 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3395 if (dsa_port_to_conduit(dp) != lag_dev) 3396 continue; 3397 3398 err = dsa_user_change_conduit(dp->user, conduit, NULL); 3399 if (err) { 3400 netdev_err(dp->user, 3401 "failed to restore conduit to %s: %pe\n", 3402 conduit->name, ERR_PTR(err)); 3403 } 3404 } 3405 3406 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3407 3408 return err; 3409 } 3410 3411 static void dsa_conduit_lag_leave(struct net_device *conduit, 3412 struct net_device *lag_dev) 3413 { 3414 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3415 struct dsa_switch_tree *dst = cpu_dp->dst; 3416 struct dsa_port *new_cpu_dp = NULL; 3417 struct net_device *lower; 3418 struct list_head *iter; 3419 3420 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3421 if (netdev_uses_dsa(lower)) { 3422 new_cpu_dp = lower->dsa_ptr; 3423 break; 3424 } 3425 } 3426 3427 if (new_cpu_dp) { 3428 /* Update the CPU port of the user ports still under the LAG 3429 * so that dsa_port_to_conduit() continues to work properly 3430 */ 3431 dsa_tree_for_each_user_port(dp, dst) 3432 if (dsa_port_to_conduit(dp) == lag_dev) 3433 dp->cpu_dp = new_cpu_dp; 3434 3435 /* Update the index of the virtual CPU port to match the lowest 3436 * physical CPU port 3437 */ 3438 lag_dev->dsa_ptr = new_cpu_dp; 3439 wmb(); 3440 } else { 3441 /* If the LAG DSA conduit has no ports left, migrate back all 3442 * user ports to the first physical CPU port 3443 */ 3444 dsa_tree_migrate_ports_from_lag_conduit(dst, lag_dev); 3445 } 3446 3447 /* This DSA conduit has left its LAG in any case, so let 3448 * the CPU port leave the hardware LAG as well 3449 */ 3450 dsa_conduit_lag_teardown(lag_dev, conduit->dsa_ptr); 3451 } 3452 3453 static int dsa_conduit_changeupper(struct net_device *dev, 3454 struct netdev_notifier_changeupper_info *info) 3455 { 3456 struct netlink_ext_ack *extack; 3457 int err = NOTIFY_DONE; 3458 3459 if (!netdev_uses_dsa(dev)) 3460 return err; 3461 3462 extack = netdev_notifier_info_to_extack(&info->info); 3463 3464 if (netif_is_lag_master(info->upper_dev)) { 3465 if (info->linking) { 3466 err = dsa_conduit_lag_join(dev, info->upper_dev, 3467 info->upper_info, extack); 3468 err = notifier_from_errno(err); 3469 } else { 3470 dsa_conduit_lag_leave(dev, info->upper_dev); 3471 err = NOTIFY_OK; 3472 } 3473 } 3474 3475 return err; 3476 } 3477 3478 static int dsa_user_netdevice_event(struct notifier_block *nb, 3479 unsigned long event, void *ptr) 3480 { 3481 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3482 3483 switch (event) { 3484 case NETDEV_PRECHANGEUPPER: { 3485 struct netdev_notifier_changeupper_info *info = ptr; 3486 int err; 3487 3488 err = dsa_user_prechangeupper_sanity_check(dev, info); 3489 if (notifier_to_errno(err)) 3490 return err; 3491 3492 err = dsa_conduit_prechangeupper_sanity_check(dev, info); 3493 if (notifier_to_errno(err)) 3494 return err; 3495 3496 err = dsa_lag_conduit_prechangelower_sanity_check(dev, info); 3497 if (notifier_to_errno(err)) 3498 return err; 3499 3500 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3501 if (notifier_to_errno(err)) 3502 return err; 3503 3504 err = dsa_user_prechangeupper(dev, ptr); 3505 if (notifier_to_errno(err)) 3506 return err; 3507 3508 err = dsa_user_lag_prechangeupper(dev, ptr); 3509 if (notifier_to_errno(err)) 3510 return err; 3511 3512 break; 3513 } 3514 case NETDEV_CHANGEUPPER: { 3515 int err; 3516 3517 err = dsa_user_changeupper(dev, ptr); 3518 if (notifier_to_errno(err)) 3519 return err; 3520 3521 err = dsa_user_lag_changeupper(dev, ptr); 3522 if (notifier_to_errno(err)) 3523 return err; 3524 3525 err = dsa_conduit_changeupper(dev, ptr); 3526 if (notifier_to_errno(err)) 3527 return err; 3528 3529 break; 3530 } 3531 case NETDEV_CHANGELOWERSTATE: { 3532 struct netdev_notifier_changelowerstate_info *info = ptr; 3533 struct dsa_port *dp; 3534 int err = 0; 3535 3536 if (dsa_user_dev_check(dev)) { 3537 dp = dsa_user_to_port(dev); 3538 3539 err = dsa_port_lag_change(dp, info->lower_state_info); 3540 } 3541 3542 /* Mirror LAG port events on DSA conduits that are in 3543 * a LAG towards their respective switch CPU ports 3544 */ 3545 if (netdev_uses_dsa(dev)) { 3546 dp = dev->dsa_ptr; 3547 3548 err = dsa_port_lag_change(dp, info->lower_state_info); 3549 } 3550 3551 return notifier_from_errno(err); 3552 } 3553 case NETDEV_CHANGE: 3554 case NETDEV_UP: { 3555 /* Track state of conduit port. 3556 * DSA driver may require the conduit port (and indirectly 3557 * the tagger) to be available for some special operation. 3558 */ 3559 if (netdev_uses_dsa(dev)) { 3560 struct dsa_port *cpu_dp = dev->dsa_ptr; 3561 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3562 3563 /* Track when the conduit port is UP */ 3564 dsa_tree_conduit_oper_state_change(dst, dev, 3565 netif_oper_up(dev)); 3566 3567 /* Track when the conduit port is ready and can accept 3568 * packet. 3569 * NETDEV_UP event is not enough to flag a port as ready. 3570 * We also have to wait for linkwatch_do_dev to dev_activate 3571 * and emit a NETDEV_CHANGE event. 3572 * We check if a conduit port is ready by checking if the dev 3573 * have a qdisc assigned and is not noop. 3574 */ 3575 dsa_tree_conduit_admin_state_change(dst, dev, 3576 !qdisc_tx_is_noop(dev)); 3577 3578 return NOTIFY_OK; 3579 } 3580 3581 return NOTIFY_DONE; 3582 } 3583 case NETDEV_GOING_DOWN: { 3584 struct dsa_port *dp, *cpu_dp; 3585 struct dsa_switch_tree *dst; 3586 LIST_HEAD(close_list); 3587 3588 if (!netdev_uses_dsa(dev)) 3589 return NOTIFY_DONE; 3590 3591 cpu_dp = dev->dsa_ptr; 3592 dst = cpu_dp->ds->dst; 3593 3594 dsa_tree_conduit_admin_state_change(dst, dev, false); 3595 3596 list_for_each_entry(dp, &dst->ports, list) { 3597 if (!dsa_port_is_user(dp)) 3598 continue; 3599 3600 if (dp->cpu_dp != cpu_dp) 3601 continue; 3602 3603 list_add(&dp->user->close_list, &close_list); 3604 } 3605 3606 netif_close_many(&close_list, true); 3607 3608 return NOTIFY_OK; 3609 } 3610 default: 3611 break; 3612 } 3613 3614 return NOTIFY_DONE; 3615 } 3616 3617 static void 3618 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3619 { 3620 struct switchdev_notifier_fdb_info info = {}; 3621 3622 info.addr = switchdev_work->addr; 3623 info.vid = switchdev_work->vid; 3624 info.offloaded = true; 3625 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3626 switchdev_work->orig_dev, &info.info, NULL); 3627 } 3628 3629 static void dsa_user_switchdev_event_work(struct work_struct *work) 3630 { 3631 struct dsa_switchdev_event_work *switchdev_work = 3632 container_of(work, struct dsa_switchdev_event_work, work); 3633 const unsigned char *addr = switchdev_work->addr; 3634 struct net_device *dev = switchdev_work->dev; 3635 u16 vid = switchdev_work->vid; 3636 struct dsa_switch *ds; 3637 struct dsa_port *dp; 3638 int err; 3639 3640 dp = dsa_user_to_port(dev); 3641 ds = dp->ds; 3642 3643 switch (switchdev_work->event) { 3644 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3645 if (switchdev_work->host_addr) 3646 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3647 else if (dp->lag) 3648 err = dsa_port_lag_fdb_add(dp, addr, vid); 3649 else 3650 err = dsa_port_fdb_add(dp, addr, vid); 3651 if (err) { 3652 dev_err(ds->dev, 3653 "port %d failed to add %pM vid %d to fdb: %d\n", 3654 dp->index, addr, vid, err); 3655 break; 3656 } 3657 dsa_fdb_offload_notify(switchdev_work); 3658 break; 3659 3660 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3661 if (switchdev_work->host_addr) 3662 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3663 else if (dp->lag) 3664 err = dsa_port_lag_fdb_del(dp, addr, vid); 3665 else 3666 err = dsa_port_fdb_del(dp, addr, vid); 3667 if (err) { 3668 dev_err(ds->dev, 3669 "port %d failed to delete %pM vid %d from fdb: %d\n", 3670 dp->index, addr, vid, err); 3671 } 3672 3673 break; 3674 } 3675 3676 kfree(switchdev_work); 3677 } 3678 3679 static bool dsa_foreign_dev_check(const struct net_device *dev, 3680 const struct net_device *foreign_dev) 3681 { 3682 const struct dsa_port *dp = dsa_user_to_port(dev); 3683 struct dsa_switch_tree *dst = dp->ds->dst; 3684 3685 if (netif_is_bridge_master(foreign_dev)) 3686 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3687 3688 if (netif_is_bridge_port(foreign_dev)) 3689 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3690 3691 /* Everything else is foreign */ 3692 return true; 3693 } 3694 3695 static int dsa_user_fdb_event(struct net_device *dev, 3696 struct net_device *orig_dev, 3697 unsigned long event, const void *ctx, 3698 const struct switchdev_notifier_fdb_info *fdb_info) 3699 { 3700 struct dsa_switchdev_event_work *switchdev_work; 3701 struct dsa_port *dp = dsa_user_to_port(dev); 3702 bool host_addr = fdb_info->is_local; 3703 struct dsa_switch *ds = dp->ds; 3704 3705 if (ctx && ctx != dp) 3706 return 0; 3707 3708 if (!dp->bridge) 3709 return 0; 3710 3711 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3712 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3713 return 0; 3714 3715 /* FDB entries learned by the software bridge or by foreign 3716 * bridge ports should be installed as host addresses only if 3717 * the driver requests assisted learning. 3718 */ 3719 if (!ds->assisted_learning_on_cpu_port) 3720 return 0; 3721 } 3722 3723 /* Also treat FDB entries on foreign interfaces bridged with us as host 3724 * addresses. 3725 */ 3726 if (dsa_foreign_dev_check(dev, orig_dev)) 3727 host_addr = true; 3728 3729 /* Check early that we're not doing work in vain. 3730 * Host addresses on LAG ports still require regular FDB ops, 3731 * since the CPU port isn't in a LAG. 3732 */ 3733 if (dp->lag && !host_addr) { 3734 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3735 return -EOPNOTSUPP; 3736 } else { 3737 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3738 return -EOPNOTSUPP; 3739 } 3740 3741 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3742 if (!switchdev_work) 3743 return -ENOMEM; 3744 3745 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3746 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3747 orig_dev->name, fdb_info->addr, fdb_info->vid, 3748 host_addr ? " as host address" : ""); 3749 3750 INIT_WORK(&switchdev_work->work, dsa_user_switchdev_event_work); 3751 switchdev_work->event = event; 3752 switchdev_work->dev = dev; 3753 switchdev_work->orig_dev = orig_dev; 3754 3755 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3756 switchdev_work->vid = fdb_info->vid; 3757 switchdev_work->host_addr = host_addr; 3758 3759 dsa_schedule_work(&switchdev_work->work); 3760 3761 return 0; 3762 } 3763 3764 /* Called under rcu_read_lock() */ 3765 static int dsa_user_switchdev_event(struct notifier_block *unused, 3766 unsigned long event, void *ptr) 3767 { 3768 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3769 int err; 3770 3771 switch (event) { 3772 case SWITCHDEV_PORT_ATTR_SET: 3773 err = switchdev_handle_port_attr_set(dev, ptr, 3774 dsa_user_dev_check, 3775 dsa_user_port_attr_set); 3776 return notifier_from_errno(err); 3777 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3778 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3779 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3780 dsa_user_dev_check, 3781 dsa_foreign_dev_check, 3782 dsa_user_fdb_event); 3783 return notifier_from_errno(err); 3784 default: 3785 return NOTIFY_DONE; 3786 } 3787 3788 return NOTIFY_OK; 3789 } 3790 3791 static int dsa_user_switchdev_blocking_event(struct notifier_block *unused, 3792 unsigned long event, void *ptr) 3793 { 3794 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3795 int err; 3796 3797 switch (event) { 3798 case SWITCHDEV_PORT_OBJ_ADD: 3799 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3800 dsa_user_dev_check, 3801 dsa_foreign_dev_check, 3802 dsa_user_port_obj_add); 3803 return notifier_from_errno(err); 3804 case SWITCHDEV_PORT_OBJ_DEL: 3805 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3806 dsa_user_dev_check, 3807 dsa_foreign_dev_check, 3808 dsa_user_port_obj_del); 3809 return notifier_from_errno(err); 3810 case SWITCHDEV_PORT_ATTR_SET: 3811 err = switchdev_handle_port_attr_set(dev, ptr, 3812 dsa_user_dev_check, 3813 dsa_user_port_attr_set); 3814 return notifier_from_errno(err); 3815 } 3816 3817 return NOTIFY_DONE; 3818 } 3819 3820 static struct notifier_block dsa_user_nb __read_mostly = { 3821 .notifier_call = dsa_user_netdevice_event, 3822 }; 3823 3824 struct notifier_block dsa_user_switchdev_notifier = { 3825 .notifier_call = dsa_user_switchdev_event, 3826 }; 3827 3828 struct notifier_block dsa_user_switchdev_blocking_notifier = { 3829 .notifier_call = dsa_user_switchdev_blocking_event, 3830 }; 3831 3832 int dsa_user_register_notifier(void) 3833 { 3834 struct notifier_block *nb; 3835 int err; 3836 3837 err = register_netdevice_notifier(&dsa_user_nb); 3838 if (err) 3839 return err; 3840 3841 err = register_switchdev_notifier(&dsa_user_switchdev_notifier); 3842 if (err) 3843 goto err_switchdev_nb; 3844 3845 nb = &dsa_user_switchdev_blocking_notifier; 3846 err = register_switchdev_blocking_notifier(nb); 3847 if (err) 3848 goto err_switchdev_blocking_nb; 3849 3850 return 0; 3851 3852 err_switchdev_blocking_nb: 3853 unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3854 err_switchdev_nb: 3855 unregister_netdevice_notifier(&dsa_user_nb); 3856 return err; 3857 } 3858 3859 void dsa_user_unregister_notifier(void) 3860 { 3861 struct notifier_block *nb; 3862 int err; 3863 3864 nb = &dsa_user_switchdev_blocking_notifier; 3865 err = unregister_switchdev_blocking_notifier(nb); 3866 if (err) 3867 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3868 3869 err = unregister_switchdev_notifier(&dsa_user_switchdev_notifier); 3870 if (err) 3871 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3872 3873 err = unregister_netdevice_notifier(&dsa_user_nb); 3874 if (err) 3875 pr_err("DSA: failed to unregister user notifier (%d)\n", err); 3876 } 3877