1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/dsa/slave.c - Slave 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 25 #include "dsa_priv.h" 26 27 static void dsa_slave_standalone_event_work(struct work_struct *work) 28 { 29 struct dsa_standalone_event_work *standalone_work = 30 container_of(work, struct dsa_standalone_event_work, work); 31 const unsigned char *addr = standalone_work->addr; 32 struct net_device *dev = standalone_work->dev; 33 struct dsa_port *dp = dsa_slave_to_port(dev); 34 struct switchdev_obj_port_mdb mdb; 35 struct dsa_switch *ds = dp->ds; 36 u16 vid = standalone_work->vid; 37 int err; 38 39 switch (standalone_work->event) { 40 case DSA_UC_ADD: 41 err = dsa_port_standalone_host_fdb_add(dp, addr, vid); 42 if (err) { 43 dev_err(ds->dev, 44 "port %d failed to add %pM vid %d to fdb: %d\n", 45 dp->index, addr, vid, err); 46 break; 47 } 48 break; 49 50 case DSA_UC_DEL: 51 err = dsa_port_standalone_host_fdb_del(dp, addr, vid); 52 if (err) { 53 dev_err(ds->dev, 54 "port %d failed to delete %pM vid %d from fdb: %d\n", 55 dp->index, addr, vid, err); 56 } 57 58 break; 59 case DSA_MC_ADD: 60 ether_addr_copy(mdb.addr, addr); 61 mdb.vid = vid; 62 63 err = dsa_port_standalone_host_mdb_add(dp, &mdb); 64 if (err) { 65 dev_err(ds->dev, 66 "port %d failed to add %pM vid %d to mdb: %d\n", 67 dp->index, addr, vid, err); 68 break; 69 } 70 break; 71 case DSA_MC_DEL: 72 ether_addr_copy(mdb.addr, addr); 73 mdb.vid = vid; 74 75 err = dsa_port_standalone_host_mdb_del(dp, &mdb); 76 if (err) { 77 dev_err(ds->dev, 78 "port %d failed to delete %pM vid %d from mdb: %d\n", 79 dp->index, addr, vid, err); 80 } 81 82 break; 83 } 84 85 kfree(standalone_work); 86 } 87 88 static int dsa_slave_schedule_standalone_work(struct net_device *dev, 89 enum dsa_standalone_event event, 90 const unsigned char *addr, 91 u16 vid) 92 { 93 struct dsa_standalone_event_work *standalone_work; 94 95 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC); 96 if (!standalone_work) 97 return -ENOMEM; 98 99 INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work); 100 standalone_work->event = event; 101 standalone_work->dev = dev; 102 103 ether_addr_copy(standalone_work->addr, addr); 104 standalone_work->vid = vid; 105 106 dsa_schedule_work(&standalone_work->work); 107 108 return 0; 109 } 110 111 static int dsa_slave_sync_uc(struct net_device *dev, 112 const unsigned char *addr) 113 { 114 struct net_device *master = dsa_slave_to_master(dev); 115 struct dsa_port *dp = dsa_slave_to_port(dev); 116 117 dev_uc_add(master, addr); 118 119 if (!dsa_switch_supports_uc_filtering(dp->ds)) 120 return 0; 121 122 return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0); 123 } 124 125 static int dsa_slave_unsync_uc(struct net_device *dev, 126 const unsigned char *addr) 127 { 128 struct net_device *master = dsa_slave_to_master(dev); 129 struct dsa_port *dp = dsa_slave_to_port(dev); 130 131 dev_uc_del(master, addr); 132 133 if (!dsa_switch_supports_uc_filtering(dp->ds)) 134 return 0; 135 136 return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0); 137 } 138 139 static int dsa_slave_sync_mc(struct net_device *dev, 140 const unsigned char *addr) 141 { 142 struct net_device *master = dsa_slave_to_master(dev); 143 struct dsa_port *dp = dsa_slave_to_port(dev); 144 145 dev_mc_add(master, addr); 146 147 if (!dsa_switch_supports_mc_filtering(dp->ds)) 148 return 0; 149 150 return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0); 151 } 152 153 static int dsa_slave_unsync_mc(struct net_device *dev, 154 const unsigned char *addr) 155 { 156 struct net_device *master = dsa_slave_to_master(dev); 157 struct dsa_port *dp = dsa_slave_to_port(dev); 158 159 dev_mc_del(master, addr); 160 161 if (!dsa_switch_supports_mc_filtering(dp->ds)) 162 return 0; 163 164 return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0); 165 } 166 167 void dsa_slave_sync_ha(struct net_device *dev) 168 { 169 struct dsa_port *dp = dsa_slave_to_port(dev); 170 struct dsa_switch *ds = dp->ds; 171 struct netdev_hw_addr *ha; 172 173 netif_addr_lock_bh(dev); 174 175 netdev_for_each_synced_mc_addr(ha, dev) 176 dsa_slave_sync_mc(dev, ha->addr); 177 178 netdev_for_each_synced_uc_addr(ha, dev) 179 dsa_slave_sync_uc(dev, ha->addr); 180 181 netif_addr_unlock_bh(dev); 182 183 if (dsa_switch_supports_uc_filtering(ds) || 184 dsa_switch_supports_mc_filtering(ds)) 185 dsa_flush_workqueue(); 186 } 187 188 void dsa_slave_unsync_ha(struct net_device *dev) 189 { 190 struct dsa_port *dp = dsa_slave_to_port(dev); 191 struct dsa_switch *ds = dp->ds; 192 struct netdev_hw_addr *ha; 193 194 netif_addr_lock_bh(dev); 195 196 netdev_for_each_synced_uc_addr(ha, dev) 197 dsa_slave_unsync_uc(dev, ha->addr); 198 199 netdev_for_each_synced_mc_addr(ha, dev) 200 dsa_slave_unsync_mc(dev, ha->addr); 201 202 netif_addr_unlock_bh(dev); 203 204 if (dsa_switch_supports_uc_filtering(ds) || 205 dsa_switch_supports_mc_filtering(ds)) 206 dsa_flush_workqueue(); 207 } 208 209 /* slave mii_bus handling ***************************************************/ 210 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 211 { 212 struct dsa_switch *ds = bus->priv; 213 214 if (ds->phys_mii_mask & (1 << addr)) 215 return ds->ops->phy_read(ds, addr, reg); 216 217 return 0xffff; 218 } 219 220 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 221 { 222 struct dsa_switch *ds = bus->priv; 223 224 if (ds->phys_mii_mask & (1 << addr)) 225 return ds->ops->phy_write(ds, addr, reg, val); 226 227 return 0; 228 } 229 230 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 231 { 232 ds->slave_mii_bus->priv = (void *)ds; 233 ds->slave_mii_bus->name = "dsa slave smi"; 234 ds->slave_mii_bus->read = dsa_slave_phy_read; 235 ds->slave_mii_bus->write = dsa_slave_phy_write; 236 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 237 ds->dst->index, ds->index); 238 ds->slave_mii_bus->parent = ds->dev; 239 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 240 } 241 242 243 /* slave device handling ****************************************************/ 244 static int dsa_slave_get_iflink(const struct net_device *dev) 245 { 246 return dsa_slave_to_master(dev)->ifindex; 247 } 248 249 static int dsa_slave_open(struct net_device *dev) 250 { 251 struct net_device *master = dsa_slave_to_master(dev); 252 struct dsa_port *dp = dsa_slave_to_port(dev); 253 struct dsa_switch *ds = dp->ds; 254 int err; 255 256 err = dev_open(master, NULL); 257 if (err < 0) { 258 netdev_err(dev, "failed to open master %s\n", master->name); 259 goto out; 260 } 261 262 if (dsa_switch_supports_uc_filtering(ds)) { 263 err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0); 264 if (err) 265 goto out; 266 } 267 268 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 269 err = dev_uc_add(master, dev->dev_addr); 270 if (err < 0) 271 goto del_host_addr; 272 } 273 274 err = dsa_port_enable_rt(dp, dev->phydev); 275 if (err) 276 goto del_unicast; 277 278 return 0; 279 280 del_unicast: 281 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 282 dev_uc_del(master, dev->dev_addr); 283 del_host_addr: 284 if (dsa_switch_supports_uc_filtering(ds)) 285 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 286 out: 287 return err; 288 } 289 290 static int dsa_slave_close(struct net_device *dev) 291 { 292 struct net_device *master = dsa_slave_to_master(dev); 293 struct dsa_port *dp = dsa_slave_to_port(dev); 294 struct dsa_switch *ds = dp->ds; 295 296 dsa_port_disable_rt(dp); 297 298 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 299 dev_uc_del(master, dev->dev_addr); 300 301 if (dsa_switch_supports_uc_filtering(ds)) 302 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 303 304 return 0; 305 } 306 307 static void dsa_slave_manage_host_flood(struct net_device *dev) 308 { 309 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI); 310 struct dsa_port *dp = dsa_slave_to_port(dev); 311 bool uc = dev->flags & IFF_PROMISC; 312 313 dsa_port_set_host_flood(dp, uc, mc); 314 } 315 316 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 317 { 318 struct net_device *master = dsa_slave_to_master(dev); 319 struct dsa_port *dp = dsa_slave_to_port(dev); 320 struct dsa_switch *ds = dp->ds; 321 322 if (change & IFF_ALLMULTI) 323 dev_set_allmulti(master, 324 dev->flags & IFF_ALLMULTI ? 1 : -1); 325 if (change & IFF_PROMISC) 326 dev_set_promiscuity(master, 327 dev->flags & IFF_PROMISC ? 1 : -1); 328 329 if (dsa_switch_supports_uc_filtering(ds) && 330 dsa_switch_supports_mc_filtering(ds)) 331 dsa_slave_manage_host_flood(dev); 332 } 333 334 static void dsa_slave_set_rx_mode(struct net_device *dev) 335 { 336 __dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc); 337 __dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc); 338 } 339 340 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 341 { 342 struct net_device *master = dsa_slave_to_master(dev); 343 struct dsa_port *dp = dsa_slave_to_port(dev); 344 struct dsa_switch *ds = dp->ds; 345 struct sockaddr *addr = a; 346 int err; 347 348 if (!is_valid_ether_addr(addr->sa_data)) 349 return -EADDRNOTAVAIL; 350 351 /* If the port is down, the address isn't synced yet to hardware or 352 * to the DSA master, so there is nothing to change. 353 */ 354 if (!(dev->flags & IFF_UP)) 355 goto out_change_dev_addr; 356 357 if (dsa_switch_supports_uc_filtering(ds)) { 358 err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0); 359 if (err) 360 return err; 361 } 362 363 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 364 err = dev_uc_add(master, addr->sa_data); 365 if (err < 0) 366 goto del_unicast; 367 } 368 369 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 370 dev_uc_del(master, dev->dev_addr); 371 372 if (dsa_switch_supports_uc_filtering(ds)) 373 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 374 375 out_change_dev_addr: 376 eth_hw_addr_set(dev, addr->sa_data); 377 378 return 0; 379 380 del_unicast: 381 if (dsa_switch_supports_uc_filtering(ds)) 382 dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0); 383 384 return err; 385 } 386 387 struct dsa_slave_dump_ctx { 388 struct net_device *dev; 389 struct sk_buff *skb; 390 struct netlink_callback *cb; 391 int idx; 392 }; 393 394 static int 395 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 396 bool is_static, void *data) 397 { 398 struct dsa_slave_dump_ctx *dump = data; 399 u32 portid = NETLINK_CB(dump->cb->skb).portid; 400 u32 seq = dump->cb->nlh->nlmsg_seq; 401 struct nlmsghdr *nlh; 402 struct ndmsg *ndm; 403 404 if (dump->idx < dump->cb->args[2]) 405 goto skip; 406 407 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 408 sizeof(*ndm), NLM_F_MULTI); 409 if (!nlh) 410 return -EMSGSIZE; 411 412 ndm = nlmsg_data(nlh); 413 ndm->ndm_family = AF_BRIDGE; 414 ndm->ndm_pad1 = 0; 415 ndm->ndm_pad2 = 0; 416 ndm->ndm_flags = NTF_SELF; 417 ndm->ndm_type = 0; 418 ndm->ndm_ifindex = dump->dev->ifindex; 419 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 420 421 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 422 goto nla_put_failure; 423 424 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 425 goto nla_put_failure; 426 427 nlmsg_end(dump->skb, nlh); 428 429 skip: 430 dump->idx++; 431 return 0; 432 433 nla_put_failure: 434 nlmsg_cancel(dump->skb, nlh); 435 return -EMSGSIZE; 436 } 437 438 static int 439 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 440 struct net_device *dev, struct net_device *filter_dev, 441 int *idx) 442 { 443 struct dsa_port *dp = dsa_slave_to_port(dev); 444 struct dsa_slave_dump_ctx dump = { 445 .dev = dev, 446 .skb = skb, 447 .cb = cb, 448 .idx = *idx, 449 }; 450 int err; 451 452 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 453 *idx = dump.idx; 454 455 return err; 456 } 457 458 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 459 { 460 struct dsa_slave_priv *p = netdev_priv(dev); 461 struct dsa_switch *ds = p->dp->ds; 462 int port = p->dp->index; 463 464 /* Pass through to switch driver if it supports timestamping */ 465 switch (cmd) { 466 case SIOCGHWTSTAMP: 467 if (ds->ops->port_hwtstamp_get) 468 return ds->ops->port_hwtstamp_get(ds, port, ifr); 469 break; 470 case SIOCSHWTSTAMP: 471 if (ds->ops->port_hwtstamp_set) 472 return ds->ops->port_hwtstamp_set(ds, port, ifr); 473 break; 474 } 475 476 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 477 } 478 479 static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx, 480 const struct switchdev_attr *attr, 481 struct netlink_ext_ack *extack) 482 { 483 struct dsa_port *dp = dsa_slave_to_port(dev); 484 int ret; 485 486 if (ctx && ctx != dp) 487 return 0; 488 489 switch (attr->id) { 490 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 491 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 492 return -EOPNOTSUPP; 493 494 ret = dsa_port_set_state(dp, attr->u.stp_state, true); 495 break; 496 case SWITCHDEV_ATTR_ID_PORT_MST_STATE: 497 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 498 return -EOPNOTSUPP; 499 500 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack); 501 break; 502 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 503 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 504 return -EOPNOTSUPP; 505 506 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 507 extack); 508 break; 509 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 510 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 511 return -EOPNOTSUPP; 512 513 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 514 break; 515 case SWITCHDEV_ATTR_ID_BRIDGE_MST: 516 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 517 return -EOPNOTSUPP; 518 519 ret = dsa_port_mst_enable(dp, attr->u.mst, extack); 520 break; 521 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 522 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 523 return -EOPNOTSUPP; 524 525 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 526 extack); 527 break; 528 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 529 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 530 return -EOPNOTSUPP; 531 532 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 533 break; 534 case SWITCHDEV_ATTR_ID_VLAN_MSTI: 535 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 536 return -EOPNOTSUPP; 537 538 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti); 539 break; 540 default: 541 ret = -EOPNOTSUPP; 542 break; 543 } 544 545 return ret; 546 } 547 548 /* Must be called under rcu_read_lock() */ 549 static int 550 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave, 551 const struct switchdev_obj_port_vlan *vlan) 552 { 553 struct net_device *upper_dev; 554 struct list_head *iter; 555 556 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 557 u16 vid; 558 559 if (!is_vlan_dev(upper_dev)) 560 continue; 561 562 vid = vlan_dev_vlan_id(upper_dev); 563 if (vid == vlan->vid) 564 return -EBUSY; 565 } 566 567 return 0; 568 } 569 570 static int dsa_slave_vlan_add(struct net_device *dev, 571 const struct switchdev_obj *obj, 572 struct netlink_ext_ack *extack) 573 { 574 struct dsa_port *dp = dsa_slave_to_port(dev); 575 struct switchdev_obj_port_vlan *vlan; 576 int err; 577 578 if (dsa_port_skip_vlan_configuration(dp)) { 579 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 580 return 0; 581 } 582 583 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 584 585 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 586 * the same VID. 587 */ 588 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { 589 rcu_read_lock(); 590 err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan); 591 rcu_read_unlock(); 592 if (err) { 593 NL_SET_ERR_MSG_MOD(extack, 594 "Port already has a VLAN upper with this VID"); 595 return err; 596 } 597 } 598 599 return dsa_port_vlan_add(dp, vlan, extack); 600 } 601 602 /* Offload a VLAN installed on the bridge or on a foreign interface by 603 * installing it as a VLAN towards the CPU port. 604 */ 605 static int dsa_slave_host_vlan_add(struct net_device *dev, 606 const struct switchdev_obj *obj, 607 struct netlink_ext_ack *extack) 608 { 609 struct dsa_port *dp = dsa_slave_to_port(dev); 610 struct switchdev_obj_port_vlan vlan; 611 612 /* Do nothing if this is a software bridge */ 613 if (!dp->bridge) 614 return -EOPNOTSUPP; 615 616 if (dsa_port_skip_vlan_configuration(dp)) { 617 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 618 return 0; 619 } 620 621 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 622 623 /* Even though drivers often handle CPU membership in special ways, 624 * it doesn't make sense to program a PVID, so clear this flag. 625 */ 626 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 627 628 return dsa_port_host_vlan_add(dp, &vlan, extack); 629 } 630 631 static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, 632 const struct switchdev_obj *obj, 633 struct netlink_ext_ack *extack) 634 { 635 struct dsa_port *dp = dsa_slave_to_port(dev); 636 int err; 637 638 if (ctx && ctx != dp) 639 return 0; 640 641 switch (obj->id) { 642 case SWITCHDEV_OBJ_ID_PORT_MDB: 643 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 644 return -EOPNOTSUPP; 645 646 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 647 break; 648 case SWITCHDEV_OBJ_ID_HOST_MDB: 649 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 650 return -EOPNOTSUPP; 651 652 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 653 break; 654 case SWITCHDEV_OBJ_ID_PORT_VLAN: 655 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 656 err = dsa_slave_vlan_add(dev, obj, extack); 657 else 658 err = dsa_slave_host_vlan_add(dev, obj, extack); 659 break; 660 case SWITCHDEV_OBJ_ID_MRP: 661 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 662 return -EOPNOTSUPP; 663 664 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 665 break; 666 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 667 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 668 return -EOPNOTSUPP; 669 670 err = dsa_port_mrp_add_ring_role(dp, 671 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 672 break; 673 default: 674 err = -EOPNOTSUPP; 675 break; 676 } 677 678 return err; 679 } 680 681 static int dsa_slave_vlan_del(struct net_device *dev, 682 const struct switchdev_obj *obj) 683 { 684 struct dsa_port *dp = dsa_slave_to_port(dev); 685 struct switchdev_obj_port_vlan *vlan; 686 687 if (dsa_port_skip_vlan_configuration(dp)) 688 return 0; 689 690 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 691 692 return dsa_port_vlan_del(dp, vlan); 693 } 694 695 static int dsa_slave_host_vlan_del(struct net_device *dev, 696 const struct switchdev_obj *obj) 697 { 698 struct dsa_port *dp = dsa_slave_to_port(dev); 699 struct switchdev_obj_port_vlan *vlan; 700 701 /* Do nothing if this is a software bridge */ 702 if (!dp->bridge) 703 return -EOPNOTSUPP; 704 705 if (dsa_port_skip_vlan_configuration(dp)) 706 return 0; 707 708 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 709 710 return dsa_port_host_vlan_del(dp, vlan); 711 } 712 713 static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx, 714 const struct switchdev_obj *obj) 715 { 716 struct dsa_port *dp = dsa_slave_to_port(dev); 717 int err; 718 719 if (ctx && ctx != dp) 720 return 0; 721 722 switch (obj->id) { 723 case SWITCHDEV_OBJ_ID_PORT_MDB: 724 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 725 return -EOPNOTSUPP; 726 727 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 728 break; 729 case SWITCHDEV_OBJ_ID_HOST_MDB: 730 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 731 return -EOPNOTSUPP; 732 733 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 734 break; 735 case SWITCHDEV_OBJ_ID_PORT_VLAN: 736 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 737 err = dsa_slave_vlan_del(dev, obj); 738 else 739 err = dsa_slave_host_vlan_del(dev, obj); 740 break; 741 case SWITCHDEV_OBJ_ID_MRP: 742 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 743 return -EOPNOTSUPP; 744 745 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 746 break; 747 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 748 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 749 return -EOPNOTSUPP; 750 751 err = dsa_port_mrp_del_ring_role(dp, 752 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 753 break; 754 default: 755 err = -EOPNOTSUPP; 756 break; 757 } 758 759 return err; 760 } 761 762 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 763 struct sk_buff *skb) 764 { 765 #ifdef CONFIG_NET_POLL_CONTROLLER 766 struct dsa_slave_priv *p = netdev_priv(dev); 767 768 return netpoll_send_skb(p->netpoll, skb); 769 #else 770 BUG(); 771 return NETDEV_TX_OK; 772 #endif 773 } 774 775 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 776 struct sk_buff *skb) 777 { 778 struct dsa_switch *ds = p->dp->ds; 779 780 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 781 return; 782 783 if (!ds->ops->port_txtstamp) 784 return; 785 786 ds->ops->port_txtstamp(ds, p->dp->index, skb); 787 } 788 789 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 790 { 791 /* SKB for netpoll still need to be mangled with the protocol-specific 792 * tag to be successfully transmitted 793 */ 794 if (unlikely(netpoll_tx_running(dev))) 795 return dsa_slave_netpoll_send_skb(dev, skb); 796 797 /* Queue the SKB for transmission on the parent interface, but 798 * do not modify its EtherType 799 */ 800 skb->dev = dsa_slave_to_master(dev); 801 dev_queue_xmit(skb); 802 803 return NETDEV_TX_OK; 804 } 805 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 806 807 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) 808 { 809 int needed_headroom = dev->needed_headroom; 810 int needed_tailroom = dev->needed_tailroom; 811 812 /* For tail taggers, we need to pad short frames ourselves, to ensure 813 * that the tail tag does not fail at its role of being at the end of 814 * the packet, once the master interface pads the frame. Account for 815 * that pad length here, and pad later. 816 */ 817 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) 818 needed_tailroom += ETH_ZLEN - skb->len; 819 /* skb_headroom() returns unsigned int... */ 820 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); 821 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); 822 823 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) 824 /* No reallocation needed, yay! */ 825 return 0; 826 827 return pskb_expand_head(skb, needed_headroom, needed_tailroom, 828 GFP_ATOMIC); 829 } 830 831 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 832 { 833 struct dsa_slave_priv *p = netdev_priv(dev); 834 struct sk_buff *nskb; 835 836 dev_sw_netstats_tx_add(dev, 1, skb->len); 837 838 memset(skb->cb, 0, sizeof(skb->cb)); 839 840 /* Handle tx timestamp if any */ 841 dsa_skb_tx_timestamp(p, skb); 842 843 if (dsa_realloc_skb(skb, dev)) { 844 dev_kfree_skb_any(skb); 845 return NETDEV_TX_OK; 846 } 847 848 /* needed_tailroom should still be 'warm' in the cache line from 849 * dsa_realloc_skb(), which has also ensured that padding is safe. 850 */ 851 if (dev->needed_tailroom) 852 eth_skb_pad(skb); 853 854 /* Transmit function may have to reallocate the original SKB, 855 * in which case it must have freed it. Only free it here on error. 856 */ 857 nskb = p->xmit(skb, dev); 858 if (!nskb) { 859 kfree_skb(skb); 860 return NETDEV_TX_OK; 861 } 862 863 return dsa_enqueue_skb(nskb, dev); 864 } 865 866 /* ethtool operations *******************************************************/ 867 868 static void dsa_slave_get_drvinfo(struct net_device *dev, 869 struct ethtool_drvinfo *drvinfo) 870 { 871 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 872 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 873 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 874 } 875 876 static int dsa_slave_get_regs_len(struct net_device *dev) 877 { 878 struct dsa_port *dp = dsa_slave_to_port(dev); 879 struct dsa_switch *ds = dp->ds; 880 881 if (ds->ops->get_regs_len) 882 return ds->ops->get_regs_len(ds, dp->index); 883 884 return -EOPNOTSUPP; 885 } 886 887 static void 888 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 889 { 890 struct dsa_port *dp = dsa_slave_to_port(dev); 891 struct dsa_switch *ds = dp->ds; 892 893 if (ds->ops->get_regs) 894 ds->ops->get_regs(ds, dp->index, regs, _p); 895 } 896 897 static int dsa_slave_nway_reset(struct net_device *dev) 898 { 899 struct dsa_port *dp = dsa_slave_to_port(dev); 900 901 return phylink_ethtool_nway_reset(dp->pl); 902 } 903 904 static int dsa_slave_get_eeprom_len(struct net_device *dev) 905 { 906 struct dsa_port *dp = dsa_slave_to_port(dev); 907 struct dsa_switch *ds = dp->ds; 908 909 if (ds->cd && ds->cd->eeprom_len) 910 return ds->cd->eeprom_len; 911 912 if (ds->ops->get_eeprom_len) 913 return ds->ops->get_eeprom_len(ds); 914 915 return 0; 916 } 917 918 static int dsa_slave_get_eeprom(struct net_device *dev, 919 struct ethtool_eeprom *eeprom, u8 *data) 920 { 921 struct dsa_port *dp = dsa_slave_to_port(dev); 922 struct dsa_switch *ds = dp->ds; 923 924 if (ds->ops->get_eeprom) 925 return ds->ops->get_eeprom(ds, eeprom, data); 926 927 return -EOPNOTSUPP; 928 } 929 930 static int dsa_slave_set_eeprom(struct net_device *dev, 931 struct ethtool_eeprom *eeprom, u8 *data) 932 { 933 struct dsa_port *dp = dsa_slave_to_port(dev); 934 struct dsa_switch *ds = dp->ds; 935 936 if (ds->ops->set_eeprom) 937 return ds->ops->set_eeprom(ds, eeprom, data); 938 939 return -EOPNOTSUPP; 940 } 941 942 static void dsa_slave_get_strings(struct net_device *dev, 943 uint32_t stringset, uint8_t *data) 944 { 945 struct dsa_port *dp = dsa_slave_to_port(dev); 946 struct dsa_switch *ds = dp->ds; 947 948 if (stringset == ETH_SS_STATS) { 949 int len = ETH_GSTRING_LEN; 950 951 strncpy(data, "tx_packets", len); 952 strncpy(data + len, "tx_bytes", len); 953 strncpy(data + 2 * len, "rx_packets", len); 954 strncpy(data + 3 * len, "rx_bytes", len); 955 if (ds->ops->get_strings) 956 ds->ops->get_strings(ds, dp->index, stringset, 957 data + 4 * len); 958 } else if (stringset == ETH_SS_TEST) { 959 net_selftest_get_strings(data); 960 } 961 962 } 963 964 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 965 struct ethtool_stats *stats, 966 uint64_t *data) 967 { 968 struct dsa_port *dp = dsa_slave_to_port(dev); 969 struct dsa_switch *ds = dp->ds; 970 struct pcpu_sw_netstats *s; 971 unsigned int start; 972 int i; 973 974 for_each_possible_cpu(i) { 975 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 976 977 s = per_cpu_ptr(dev->tstats, i); 978 do { 979 start = u64_stats_fetch_begin(&s->syncp); 980 tx_packets = u64_stats_read(&s->tx_packets); 981 tx_bytes = u64_stats_read(&s->tx_bytes); 982 rx_packets = u64_stats_read(&s->rx_packets); 983 rx_bytes = u64_stats_read(&s->rx_bytes); 984 } while (u64_stats_fetch_retry(&s->syncp, start)); 985 data[0] += tx_packets; 986 data[1] += tx_bytes; 987 data[2] += rx_packets; 988 data[3] += rx_bytes; 989 } 990 if (ds->ops->get_ethtool_stats) 991 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 992 } 993 994 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 995 { 996 struct dsa_port *dp = dsa_slave_to_port(dev); 997 struct dsa_switch *ds = dp->ds; 998 999 if (sset == ETH_SS_STATS) { 1000 int count = 0; 1001 1002 if (ds->ops->get_sset_count) { 1003 count = ds->ops->get_sset_count(ds, dp->index, sset); 1004 if (count < 0) 1005 return count; 1006 } 1007 1008 return count + 4; 1009 } else if (sset == ETH_SS_TEST) { 1010 return net_selftest_get_count(); 1011 } 1012 1013 return -EOPNOTSUPP; 1014 } 1015 1016 static void dsa_slave_get_eth_phy_stats(struct net_device *dev, 1017 struct ethtool_eth_phy_stats *phy_stats) 1018 { 1019 struct dsa_port *dp = dsa_slave_to_port(dev); 1020 struct dsa_switch *ds = dp->ds; 1021 1022 if (ds->ops->get_eth_phy_stats) 1023 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats); 1024 } 1025 1026 static void dsa_slave_get_eth_mac_stats(struct net_device *dev, 1027 struct ethtool_eth_mac_stats *mac_stats) 1028 { 1029 struct dsa_port *dp = dsa_slave_to_port(dev); 1030 struct dsa_switch *ds = dp->ds; 1031 1032 if (ds->ops->get_eth_mac_stats) 1033 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats); 1034 } 1035 1036 static void 1037 dsa_slave_get_eth_ctrl_stats(struct net_device *dev, 1038 struct ethtool_eth_ctrl_stats *ctrl_stats) 1039 { 1040 struct dsa_port *dp = dsa_slave_to_port(dev); 1041 struct dsa_switch *ds = dp->ds; 1042 1043 if (ds->ops->get_eth_ctrl_stats) 1044 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats); 1045 } 1046 1047 static void 1048 dsa_slave_get_rmon_stats(struct net_device *dev, 1049 struct ethtool_rmon_stats *rmon_stats, 1050 const struct ethtool_rmon_hist_range **ranges) 1051 { 1052 struct dsa_port *dp = dsa_slave_to_port(dev); 1053 struct dsa_switch *ds = dp->ds; 1054 1055 if (ds->ops->get_rmon_stats) 1056 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges); 1057 } 1058 1059 static void dsa_slave_net_selftest(struct net_device *ndev, 1060 struct ethtool_test *etest, u64 *buf) 1061 { 1062 struct dsa_port *dp = dsa_slave_to_port(ndev); 1063 struct dsa_switch *ds = dp->ds; 1064 1065 if (ds->ops->self_test) { 1066 ds->ops->self_test(ds, dp->index, etest, buf); 1067 return; 1068 } 1069 1070 net_selftest(ndev, etest, buf); 1071 } 1072 1073 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1074 { 1075 struct dsa_port *dp = dsa_slave_to_port(dev); 1076 struct dsa_switch *ds = dp->ds; 1077 1078 phylink_ethtool_get_wol(dp->pl, w); 1079 1080 if (ds->ops->get_wol) 1081 ds->ops->get_wol(ds, dp->index, w); 1082 } 1083 1084 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1085 { 1086 struct dsa_port *dp = dsa_slave_to_port(dev); 1087 struct dsa_switch *ds = dp->ds; 1088 int ret = -EOPNOTSUPP; 1089 1090 phylink_ethtool_set_wol(dp->pl, w); 1091 1092 if (ds->ops->set_wol) 1093 ret = ds->ops->set_wol(ds, dp->index, w); 1094 1095 return ret; 1096 } 1097 1098 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 1099 { 1100 struct dsa_port *dp = dsa_slave_to_port(dev); 1101 struct dsa_switch *ds = dp->ds; 1102 int ret; 1103 1104 /* Port's PHY and MAC both need to be EEE capable */ 1105 if (!dev->phydev || !dp->pl) 1106 return -ENODEV; 1107 1108 if (!ds->ops->set_mac_eee) 1109 return -EOPNOTSUPP; 1110 1111 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1112 if (ret) 1113 return ret; 1114 1115 return phylink_ethtool_set_eee(dp->pl, e); 1116 } 1117 1118 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 1119 { 1120 struct dsa_port *dp = dsa_slave_to_port(dev); 1121 struct dsa_switch *ds = dp->ds; 1122 int ret; 1123 1124 /* Port's PHY and MAC both need to be EEE capable */ 1125 if (!dev->phydev || !dp->pl) 1126 return -ENODEV; 1127 1128 if (!ds->ops->get_mac_eee) 1129 return -EOPNOTSUPP; 1130 1131 ret = ds->ops->get_mac_eee(ds, dp->index, e); 1132 if (ret) 1133 return ret; 1134 1135 return phylink_ethtool_get_eee(dp->pl, e); 1136 } 1137 1138 static int dsa_slave_get_link_ksettings(struct net_device *dev, 1139 struct ethtool_link_ksettings *cmd) 1140 { 1141 struct dsa_port *dp = dsa_slave_to_port(dev); 1142 1143 return phylink_ethtool_ksettings_get(dp->pl, cmd); 1144 } 1145 1146 static int dsa_slave_set_link_ksettings(struct net_device *dev, 1147 const struct ethtool_link_ksettings *cmd) 1148 { 1149 struct dsa_port *dp = dsa_slave_to_port(dev); 1150 1151 return phylink_ethtool_ksettings_set(dp->pl, cmd); 1152 } 1153 1154 static void dsa_slave_get_pause_stats(struct net_device *dev, 1155 struct ethtool_pause_stats *pause_stats) 1156 { 1157 struct dsa_port *dp = dsa_slave_to_port(dev); 1158 struct dsa_switch *ds = dp->ds; 1159 1160 if (ds->ops->get_pause_stats) 1161 ds->ops->get_pause_stats(ds, dp->index, pause_stats); 1162 } 1163 1164 static void dsa_slave_get_pauseparam(struct net_device *dev, 1165 struct ethtool_pauseparam *pause) 1166 { 1167 struct dsa_port *dp = dsa_slave_to_port(dev); 1168 1169 phylink_ethtool_get_pauseparam(dp->pl, pause); 1170 } 1171 1172 static int dsa_slave_set_pauseparam(struct net_device *dev, 1173 struct ethtool_pauseparam *pause) 1174 { 1175 struct dsa_port *dp = dsa_slave_to_port(dev); 1176 1177 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1178 } 1179 1180 #ifdef CONFIG_NET_POLL_CONTROLLER 1181 static int dsa_slave_netpoll_setup(struct net_device *dev, 1182 struct netpoll_info *ni) 1183 { 1184 struct net_device *master = dsa_slave_to_master(dev); 1185 struct dsa_slave_priv *p = netdev_priv(dev); 1186 struct netpoll *netpoll; 1187 int err = 0; 1188 1189 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1190 if (!netpoll) 1191 return -ENOMEM; 1192 1193 err = __netpoll_setup(netpoll, master); 1194 if (err) { 1195 kfree(netpoll); 1196 goto out; 1197 } 1198 1199 p->netpoll = netpoll; 1200 out: 1201 return err; 1202 } 1203 1204 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 1205 { 1206 struct dsa_slave_priv *p = netdev_priv(dev); 1207 struct netpoll *netpoll = p->netpoll; 1208 1209 if (!netpoll) 1210 return; 1211 1212 p->netpoll = NULL; 1213 1214 __netpoll_free(netpoll); 1215 } 1216 1217 static void dsa_slave_poll_controller(struct net_device *dev) 1218 { 1219 } 1220 #endif 1221 1222 static struct dsa_mall_tc_entry * 1223 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1224 { 1225 struct dsa_slave_priv *p = netdev_priv(dev); 1226 struct dsa_mall_tc_entry *mall_tc_entry; 1227 1228 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1229 if (mall_tc_entry->cookie == cookie) 1230 return mall_tc_entry; 1231 1232 return NULL; 1233 } 1234 1235 static int 1236 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 1237 struct tc_cls_matchall_offload *cls, 1238 bool ingress) 1239 { 1240 struct netlink_ext_ack *extack = cls->common.extack; 1241 struct dsa_port *dp = dsa_slave_to_port(dev); 1242 struct dsa_slave_priv *p = netdev_priv(dev); 1243 struct dsa_mall_mirror_tc_entry *mirror; 1244 struct dsa_mall_tc_entry *mall_tc_entry; 1245 struct dsa_switch *ds = dp->ds; 1246 struct flow_action_entry *act; 1247 struct dsa_port *to_dp; 1248 int err; 1249 1250 if (!ds->ops->port_mirror_add) 1251 return -EOPNOTSUPP; 1252 1253 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1254 cls->common.extack)) 1255 return -EOPNOTSUPP; 1256 1257 act = &cls->rule->action.entries[0]; 1258 1259 if (!act->dev) 1260 return -EINVAL; 1261 1262 if (!dsa_slave_dev_check(act->dev)) 1263 return -EOPNOTSUPP; 1264 1265 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1266 if (!mall_tc_entry) 1267 return -ENOMEM; 1268 1269 mall_tc_entry->cookie = cls->cookie; 1270 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1271 mirror = &mall_tc_entry->mirror; 1272 1273 to_dp = dsa_slave_to_port(act->dev); 1274 1275 mirror->to_local_port = to_dp->index; 1276 mirror->ingress = ingress; 1277 1278 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1279 if (err) { 1280 kfree(mall_tc_entry); 1281 return err; 1282 } 1283 1284 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1285 1286 return err; 1287 } 1288 1289 static int 1290 dsa_slave_add_cls_matchall_police(struct net_device *dev, 1291 struct tc_cls_matchall_offload *cls, 1292 bool ingress) 1293 { 1294 struct netlink_ext_ack *extack = cls->common.extack; 1295 struct dsa_port *dp = dsa_slave_to_port(dev); 1296 struct dsa_slave_priv *p = netdev_priv(dev); 1297 struct dsa_mall_policer_tc_entry *policer; 1298 struct dsa_mall_tc_entry *mall_tc_entry; 1299 struct dsa_switch *ds = dp->ds; 1300 struct flow_action_entry *act; 1301 int err; 1302 1303 if (!ds->ops->port_policer_add) { 1304 NL_SET_ERR_MSG_MOD(extack, 1305 "Policing offload not implemented"); 1306 return -EOPNOTSUPP; 1307 } 1308 1309 if (!ingress) { 1310 NL_SET_ERR_MSG_MOD(extack, 1311 "Only supported on ingress qdisc"); 1312 return -EOPNOTSUPP; 1313 } 1314 1315 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1316 cls->common.extack)) 1317 return -EOPNOTSUPP; 1318 1319 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1320 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1321 NL_SET_ERR_MSG_MOD(extack, 1322 "Only one port policer allowed"); 1323 return -EEXIST; 1324 } 1325 } 1326 1327 act = &cls->rule->action.entries[0]; 1328 1329 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1330 if (!mall_tc_entry) 1331 return -ENOMEM; 1332 1333 mall_tc_entry->cookie = cls->cookie; 1334 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1335 policer = &mall_tc_entry->policer; 1336 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1337 policer->burst = act->police.burst; 1338 1339 err = ds->ops->port_policer_add(ds, dp->index, policer); 1340 if (err) { 1341 kfree(mall_tc_entry); 1342 return err; 1343 } 1344 1345 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1346 1347 return err; 1348 } 1349 1350 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1351 struct tc_cls_matchall_offload *cls, 1352 bool ingress) 1353 { 1354 int err = -EOPNOTSUPP; 1355 1356 if (cls->common.protocol == htons(ETH_P_ALL) && 1357 flow_offload_has_one_action(&cls->rule->action) && 1358 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1359 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1360 else if (flow_offload_has_one_action(&cls->rule->action) && 1361 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1362 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1363 1364 return err; 1365 } 1366 1367 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1368 struct tc_cls_matchall_offload *cls) 1369 { 1370 struct dsa_port *dp = dsa_slave_to_port(dev); 1371 struct dsa_mall_tc_entry *mall_tc_entry; 1372 struct dsa_switch *ds = dp->ds; 1373 1374 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1375 if (!mall_tc_entry) 1376 return; 1377 1378 list_del(&mall_tc_entry->list); 1379 1380 switch (mall_tc_entry->type) { 1381 case DSA_PORT_MALL_MIRROR: 1382 if (ds->ops->port_mirror_del) 1383 ds->ops->port_mirror_del(ds, dp->index, 1384 &mall_tc_entry->mirror); 1385 break; 1386 case DSA_PORT_MALL_POLICER: 1387 if (ds->ops->port_policer_del) 1388 ds->ops->port_policer_del(ds, dp->index); 1389 break; 1390 default: 1391 WARN_ON(1); 1392 } 1393 1394 kfree(mall_tc_entry); 1395 } 1396 1397 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1398 struct tc_cls_matchall_offload *cls, 1399 bool ingress) 1400 { 1401 if (cls->common.chain_index) 1402 return -EOPNOTSUPP; 1403 1404 switch (cls->command) { 1405 case TC_CLSMATCHALL_REPLACE: 1406 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1407 case TC_CLSMATCHALL_DESTROY: 1408 dsa_slave_del_cls_matchall(dev, cls); 1409 return 0; 1410 default: 1411 return -EOPNOTSUPP; 1412 } 1413 } 1414 1415 static int dsa_slave_add_cls_flower(struct net_device *dev, 1416 struct flow_cls_offload *cls, 1417 bool ingress) 1418 { 1419 struct dsa_port *dp = dsa_slave_to_port(dev); 1420 struct dsa_switch *ds = dp->ds; 1421 int port = dp->index; 1422 1423 if (!ds->ops->cls_flower_add) 1424 return -EOPNOTSUPP; 1425 1426 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1427 } 1428 1429 static int dsa_slave_del_cls_flower(struct net_device *dev, 1430 struct flow_cls_offload *cls, 1431 bool ingress) 1432 { 1433 struct dsa_port *dp = dsa_slave_to_port(dev); 1434 struct dsa_switch *ds = dp->ds; 1435 int port = dp->index; 1436 1437 if (!ds->ops->cls_flower_del) 1438 return -EOPNOTSUPP; 1439 1440 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1441 } 1442 1443 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1444 struct flow_cls_offload *cls, 1445 bool ingress) 1446 { 1447 struct dsa_port *dp = dsa_slave_to_port(dev); 1448 struct dsa_switch *ds = dp->ds; 1449 int port = dp->index; 1450 1451 if (!ds->ops->cls_flower_stats) 1452 return -EOPNOTSUPP; 1453 1454 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1455 } 1456 1457 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1458 struct flow_cls_offload *cls, 1459 bool ingress) 1460 { 1461 switch (cls->command) { 1462 case FLOW_CLS_REPLACE: 1463 return dsa_slave_add_cls_flower(dev, cls, ingress); 1464 case FLOW_CLS_DESTROY: 1465 return dsa_slave_del_cls_flower(dev, cls, ingress); 1466 case FLOW_CLS_STATS: 1467 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1468 default: 1469 return -EOPNOTSUPP; 1470 } 1471 } 1472 1473 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1474 void *cb_priv, bool ingress) 1475 { 1476 struct net_device *dev = cb_priv; 1477 1478 if (!tc_can_offload(dev)) 1479 return -EOPNOTSUPP; 1480 1481 switch (type) { 1482 case TC_SETUP_CLSMATCHALL: 1483 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1484 case TC_SETUP_CLSFLOWER: 1485 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1486 default: 1487 return -EOPNOTSUPP; 1488 } 1489 } 1490 1491 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1492 void *type_data, void *cb_priv) 1493 { 1494 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1495 } 1496 1497 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1498 void *type_data, void *cb_priv) 1499 { 1500 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1501 } 1502 1503 static LIST_HEAD(dsa_slave_block_cb_list); 1504 1505 static int dsa_slave_setup_tc_block(struct net_device *dev, 1506 struct flow_block_offload *f) 1507 { 1508 struct flow_block_cb *block_cb; 1509 flow_setup_cb_t *cb; 1510 1511 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1512 cb = dsa_slave_setup_tc_block_cb_ig; 1513 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1514 cb = dsa_slave_setup_tc_block_cb_eg; 1515 else 1516 return -EOPNOTSUPP; 1517 1518 f->driver_block_list = &dsa_slave_block_cb_list; 1519 1520 switch (f->command) { 1521 case FLOW_BLOCK_BIND: 1522 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1523 return -EBUSY; 1524 1525 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1526 if (IS_ERR(block_cb)) 1527 return PTR_ERR(block_cb); 1528 1529 flow_block_cb_add(block_cb, f); 1530 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1531 return 0; 1532 case FLOW_BLOCK_UNBIND: 1533 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1534 if (!block_cb) 1535 return -ENOENT; 1536 1537 flow_block_cb_remove(block_cb, f); 1538 list_del(&block_cb->driver_list); 1539 return 0; 1540 default: 1541 return -EOPNOTSUPP; 1542 } 1543 } 1544 1545 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port, 1546 void *type_data) 1547 { 1548 struct net_device *master = dsa_port_to_master(dsa_to_port(ds, port)); 1549 1550 if (!master->netdev_ops->ndo_setup_tc) 1551 return -EOPNOTSUPP; 1552 1553 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data); 1554 } 1555 1556 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1557 void *type_data) 1558 { 1559 struct dsa_port *dp = dsa_slave_to_port(dev); 1560 struct dsa_switch *ds = dp->ds; 1561 1562 switch (type) { 1563 case TC_SETUP_BLOCK: 1564 return dsa_slave_setup_tc_block(dev, type_data); 1565 case TC_SETUP_FT: 1566 return dsa_slave_setup_ft_block(ds, dp->index, type_data); 1567 default: 1568 break; 1569 } 1570 1571 if (!ds->ops->port_setup_tc) 1572 return -EOPNOTSUPP; 1573 1574 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1575 } 1576 1577 static int dsa_slave_get_rxnfc(struct net_device *dev, 1578 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1579 { 1580 struct dsa_port *dp = dsa_slave_to_port(dev); 1581 struct dsa_switch *ds = dp->ds; 1582 1583 if (!ds->ops->get_rxnfc) 1584 return -EOPNOTSUPP; 1585 1586 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1587 } 1588 1589 static int dsa_slave_set_rxnfc(struct net_device *dev, 1590 struct ethtool_rxnfc *nfc) 1591 { 1592 struct dsa_port *dp = dsa_slave_to_port(dev); 1593 struct dsa_switch *ds = dp->ds; 1594 1595 if (!ds->ops->set_rxnfc) 1596 return -EOPNOTSUPP; 1597 1598 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1599 } 1600 1601 static int dsa_slave_get_ts_info(struct net_device *dev, 1602 struct ethtool_ts_info *ts) 1603 { 1604 struct dsa_slave_priv *p = netdev_priv(dev); 1605 struct dsa_switch *ds = p->dp->ds; 1606 1607 if (!ds->ops->get_ts_info) 1608 return -EOPNOTSUPP; 1609 1610 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1611 } 1612 1613 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1614 u16 vid) 1615 { 1616 struct dsa_port *dp = dsa_slave_to_port(dev); 1617 struct switchdev_obj_port_vlan vlan = { 1618 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1619 .vid = vid, 1620 /* This API only allows programming tagged, non-PVID VIDs */ 1621 .flags = 0, 1622 }; 1623 struct netlink_ext_ack extack = {0}; 1624 int ret; 1625 1626 /* User port... */ 1627 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1628 if (ret) { 1629 if (extack._msg) 1630 netdev_err(dev, "%s\n", extack._msg); 1631 return ret; 1632 } 1633 1634 /* And CPU port... */ 1635 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1636 if (ret) { 1637 if (extack._msg) 1638 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1639 extack._msg); 1640 return ret; 1641 } 1642 1643 return 0; 1644 } 1645 1646 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1647 u16 vid) 1648 { 1649 struct dsa_port *dp = dsa_slave_to_port(dev); 1650 struct switchdev_obj_port_vlan vlan = { 1651 .vid = vid, 1652 /* This API only allows programming tagged, non-PVID VIDs */ 1653 .flags = 0, 1654 }; 1655 int err; 1656 1657 err = dsa_port_vlan_del(dp, &vlan); 1658 if (err) 1659 return err; 1660 1661 return dsa_port_host_vlan_del(dp, &vlan); 1662 } 1663 1664 static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg) 1665 { 1666 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1667 1668 return dsa_slave_vlan_rx_add_vid(arg, proto, vid); 1669 } 1670 1671 static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg) 1672 { 1673 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1674 1675 return dsa_slave_vlan_rx_kill_vid(arg, proto, vid); 1676 } 1677 1678 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1679 * filtering is enabled. The baseline is that only ports that offload a 1680 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1681 * but there are exceptions for quirky hardware. 1682 * 1683 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1684 * the same switch with other ports that offload a VLAN-aware bridge are also 1685 * inevitably VLAN-aware. 1686 * 1687 * To summarize, a DSA switch port offloads: 1688 * 1689 * - If standalone (this includes software bridge, software LAG): 1690 * - if ds->needs_standalone_vlan_filtering = true, OR if 1691 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1692 * this switch chip which have vlan_filtering=1) 1693 * - the 8021q upper VLANs 1694 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1695 * global, or it is, but no port is under a VLAN-aware bridge): 1696 * - no VLAN (any 8021q upper is a software VLAN) 1697 * 1698 * - If under a vlan_filtering=0 bridge which it offload: 1699 * - if ds->configure_vlan_while_not_filtering = true (default): 1700 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1701 * - else (deprecated): 1702 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1703 * enabled, so this behavior is broken and discouraged. 1704 * 1705 * - If under a vlan_filtering=1 bridge which it offload: 1706 * - the bridge VLANs 1707 * - the 8021q upper VLANs 1708 */ 1709 int dsa_slave_manage_vlan_filtering(struct net_device *slave, 1710 bool vlan_filtering) 1711 { 1712 int err; 1713 1714 if (vlan_filtering) { 1715 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1716 1717 err = vlan_for_each(slave, dsa_slave_restore_vlan, slave); 1718 if (err) { 1719 vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1720 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1721 return err; 1722 } 1723 } else { 1724 err = vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1725 if (err) 1726 return err; 1727 1728 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1729 } 1730 1731 return 0; 1732 } 1733 1734 struct dsa_hw_port { 1735 struct list_head list; 1736 struct net_device *dev; 1737 int old_mtu; 1738 }; 1739 1740 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1741 { 1742 const struct dsa_hw_port *p; 1743 int err; 1744 1745 list_for_each_entry(p, hw_port_list, list) { 1746 if (p->dev->mtu == mtu) 1747 continue; 1748 1749 err = dev_set_mtu(p->dev, mtu); 1750 if (err) 1751 goto rollback; 1752 } 1753 1754 return 0; 1755 1756 rollback: 1757 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1758 if (p->dev->mtu == p->old_mtu) 1759 continue; 1760 1761 if (dev_set_mtu(p->dev, p->old_mtu)) 1762 netdev_err(p->dev, "Failed to restore MTU\n"); 1763 } 1764 1765 return err; 1766 } 1767 1768 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1769 { 1770 struct dsa_hw_port *p, *n; 1771 1772 list_for_each_entry_safe(p, n, hw_port_list, list) 1773 kfree(p); 1774 } 1775 1776 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1777 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1778 { 1779 struct list_head hw_port_list; 1780 struct dsa_switch_tree *dst; 1781 int min_mtu = ETH_MAX_MTU; 1782 struct dsa_port *other_dp; 1783 int err; 1784 1785 if (!dp->ds->mtu_enforcement_ingress) 1786 return; 1787 1788 if (!dp->bridge) 1789 return; 1790 1791 INIT_LIST_HEAD(&hw_port_list); 1792 1793 /* Populate the list of ports that are part of the same bridge 1794 * as the newly added/modified port 1795 */ 1796 list_for_each_entry(dst, &dsa_tree_list, list) { 1797 list_for_each_entry(other_dp, &dst->ports, list) { 1798 struct dsa_hw_port *hw_port; 1799 struct net_device *slave; 1800 1801 if (other_dp->type != DSA_PORT_TYPE_USER) 1802 continue; 1803 1804 if (!dsa_port_bridge_same(dp, other_dp)) 1805 continue; 1806 1807 if (!other_dp->ds->mtu_enforcement_ingress) 1808 continue; 1809 1810 slave = other_dp->slave; 1811 1812 if (min_mtu > slave->mtu) 1813 min_mtu = slave->mtu; 1814 1815 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1816 if (!hw_port) 1817 goto out; 1818 1819 hw_port->dev = slave; 1820 hw_port->old_mtu = slave->mtu; 1821 1822 list_add(&hw_port->list, &hw_port_list); 1823 } 1824 } 1825 1826 /* Attempt to configure the entire hardware bridge to the newly added 1827 * interface's MTU first, regardless of whether the intention of the 1828 * user was to raise or lower it. 1829 */ 1830 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1831 if (!err) 1832 goto out; 1833 1834 /* Clearly that didn't work out so well, so just set the minimum MTU on 1835 * all hardware bridge ports now. If this fails too, then all ports will 1836 * still have their old MTU rolled back anyway. 1837 */ 1838 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1839 1840 out: 1841 dsa_hw_port_list_free(&hw_port_list); 1842 } 1843 1844 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1845 { 1846 struct net_device *master = dsa_slave_to_master(dev); 1847 struct dsa_port *dp = dsa_slave_to_port(dev); 1848 struct dsa_port *cpu_dp = dp->cpu_dp; 1849 struct dsa_switch *ds = dp->ds; 1850 struct dsa_port *other_dp; 1851 int largest_mtu = 0; 1852 int new_master_mtu; 1853 int old_master_mtu; 1854 int mtu_limit; 1855 int cpu_mtu; 1856 int err; 1857 1858 if (!ds->ops->port_change_mtu) 1859 return -EOPNOTSUPP; 1860 1861 dsa_tree_for_each_user_port(other_dp, ds->dst) { 1862 int slave_mtu; 1863 1864 /* During probe, this function will be called for each slave 1865 * device, while not all of them have been allocated. That's 1866 * ok, it doesn't change what the maximum is, so ignore it. 1867 */ 1868 if (!other_dp->slave) 1869 continue; 1870 1871 /* Pretend that we already applied the setting, which we 1872 * actually haven't (still haven't done all integrity checks) 1873 */ 1874 if (dp == other_dp) 1875 slave_mtu = new_mtu; 1876 else 1877 slave_mtu = other_dp->slave->mtu; 1878 1879 if (largest_mtu < slave_mtu) 1880 largest_mtu = slave_mtu; 1881 } 1882 1883 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1884 old_master_mtu = master->mtu; 1885 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops); 1886 if (new_master_mtu > mtu_limit) 1887 return -ERANGE; 1888 1889 /* If the master MTU isn't over limit, there's no need to check the CPU 1890 * MTU, since that surely isn't either. 1891 */ 1892 cpu_mtu = largest_mtu; 1893 1894 /* Start applying stuff */ 1895 if (new_master_mtu != old_master_mtu) { 1896 err = dev_set_mtu(master, new_master_mtu); 1897 if (err < 0) 1898 goto out_master_failed; 1899 1900 /* We only need to propagate the MTU of the CPU port to 1901 * upstream switches, so emit a notifier which updates them. 1902 */ 1903 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 1904 if (err) 1905 goto out_cpu_failed; 1906 } 1907 1908 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 1909 if (err) 1910 goto out_port_failed; 1911 1912 dev->mtu = new_mtu; 1913 1914 dsa_bridge_mtu_normalization(dp); 1915 1916 return 0; 1917 1918 out_port_failed: 1919 if (new_master_mtu != old_master_mtu) 1920 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1921 dsa_tag_protocol_overhead(cpu_dp->tag_ops)); 1922 out_cpu_failed: 1923 if (new_master_mtu != old_master_mtu) 1924 dev_set_mtu(master, old_master_mtu); 1925 out_master_failed: 1926 return err; 1927 } 1928 1929 static int __maybe_unused 1930 dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 1931 { 1932 struct dsa_port *dp = dsa_slave_to_port(dev); 1933 struct dsa_switch *ds = dp->ds; 1934 unsigned long mask, new_prio; 1935 int err, port = dp->index; 1936 1937 if (!ds->ops->port_set_default_prio) 1938 return -EOPNOTSUPP; 1939 1940 err = dcb_ieee_setapp(dev, app); 1941 if (err) 1942 return err; 1943 1944 mask = dcb_ieee_getapp_mask(dev, app); 1945 new_prio = __fls(mask); 1946 1947 err = ds->ops->port_set_default_prio(ds, port, new_prio); 1948 if (err) { 1949 dcb_ieee_delapp(dev, app); 1950 return err; 1951 } 1952 1953 return 0; 1954 } 1955 1956 static int __maybe_unused 1957 dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 1958 { 1959 struct dsa_port *dp = dsa_slave_to_port(dev); 1960 struct dsa_switch *ds = dp->ds; 1961 unsigned long mask, new_prio; 1962 int err, port = dp->index; 1963 u8 dscp = app->protocol; 1964 1965 if (!ds->ops->port_add_dscp_prio) 1966 return -EOPNOTSUPP; 1967 1968 if (dscp >= 64) { 1969 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 1970 dscp); 1971 return -EINVAL; 1972 } 1973 1974 err = dcb_ieee_setapp(dev, app); 1975 if (err) 1976 return err; 1977 1978 mask = dcb_ieee_getapp_mask(dev, app); 1979 new_prio = __fls(mask); 1980 1981 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 1982 if (err) { 1983 dcb_ieee_delapp(dev, app); 1984 return err; 1985 } 1986 1987 return 0; 1988 } 1989 1990 static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev, 1991 struct dcb_app *app) 1992 { 1993 switch (app->selector) { 1994 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 1995 switch (app->protocol) { 1996 case 0: 1997 return dsa_slave_dcbnl_set_default_prio(dev, app); 1998 default: 1999 return -EOPNOTSUPP; 2000 } 2001 break; 2002 case IEEE_8021QAZ_APP_SEL_DSCP: 2003 return dsa_slave_dcbnl_add_dscp_prio(dev, app); 2004 default: 2005 return -EOPNOTSUPP; 2006 } 2007 } 2008 2009 static int __maybe_unused 2010 dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2011 { 2012 struct dsa_port *dp = dsa_slave_to_port(dev); 2013 struct dsa_switch *ds = dp->ds; 2014 unsigned long mask, new_prio; 2015 int err, port = dp->index; 2016 2017 if (!ds->ops->port_set_default_prio) 2018 return -EOPNOTSUPP; 2019 2020 err = dcb_ieee_delapp(dev, app); 2021 if (err) 2022 return err; 2023 2024 mask = dcb_ieee_getapp_mask(dev, app); 2025 new_prio = mask ? __fls(mask) : 0; 2026 2027 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2028 if (err) { 2029 dcb_ieee_setapp(dev, app); 2030 return err; 2031 } 2032 2033 return 0; 2034 } 2035 2036 static int __maybe_unused 2037 dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2038 { 2039 struct dsa_port *dp = dsa_slave_to_port(dev); 2040 struct dsa_switch *ds = dp->ds; 2041 int err, port = dp->index; 2042 u8 dscp = app->protocol; 2043 2044 if (!ds->ops->port_del_dscp_prio) 2045 return -EOPNOTSUPP; 2046 2047 err = dcb_ieee_delapp(dev, app); 2048 if (err) 2049 return err; 2050 2051 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2052 if (err) { 2053 dcb_ieee_setapp(dev, app); 2054 return err; 2055 } 2056 2057 return 0; 2058 } 2059 2060 static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev, 2061 struct dcb_app *app) 2062 { 2063 switch (app->selector) { 2064 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2065 switch (app->protocol) { 2066 case 0: 2067 return dsa_slave_dcbnl_del_default_prio(dev, app); 2068 default: 2069 return -EOPNOTSUPP; 2070 } 2071 break; 2072 case IEEE_8021QAZ_APP_SEL_DSCP: 2073 return dsa_slave_dcbnl_del_dscp_prio(dev, app); 2074 default: 2075 return -EOPNOTSUPP; 2076 } 2077 } 2078 2079 /* Pre-populate the DCB application priority table with the priorities 2080 * configured during switch setup, which we read from hardware here. 2081 */ 2082 static int dsa_slave_dcbnl_init(struct net_device *dev) 2083 { 2084 struct dsa_port *dp = dsa_slave_to_port(dev); 2085 struct dsa_switch *ds = dp->ds; 2086 int port = dp->index; 2087 int err; 2088 2089 if (ds->ops->port_get_default_prio) { 2090 int prio = ds->ops->port_get_default_prio(ds, port); 2091 struct dcb_app app = { 2092 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2093 .protocol = 0, 2094 .priority = prio, 2095 }; 2096 2097 if (prio < 0) 2098 return prio; 2099 2100 err = dcb_ieee_setapp(dev, &app); 2101 if (err) 2102 return err; 2103 } 2104 2105 if (ds->ops->port_get_dscp_prio) { 2106 int protocol; 2107 2108 for (protocol = 0; protocol < 64; protocol++) { 2109 struct dcb_app app = { 2110 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2111 .protocol = protocol, 2112 }; 2113 int prio; 2114 2115 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2116 if (prio == -EOPNOTSUPP) 2117 continue; 2118 if (prio < 0) 2119 return prio; 2120 2121 app.priority = prio; 2122 2123 err = dcb_ieee_setapp(dev, &app); 2124 if (err) 2125 return err; 2126 } 2127 } 2128 2129 return 0; 2130 } 2131 2132 static const struct ethtool_ops dsa_slave_ethtool_ops = { 2133 .get_drvinfo = dsa_slave_get_drvinfo, 2134 .get_regs_len = dsa_slave_get_regs_len, 2135 .get_regs = dsa_slave_get_regs, 2136 .nway_reset = dsa_slave_nway_reset, 2137 .get_link = ethtool_op_get_link, 2138 .get_eeprom_len = dsa_slave_get_eeprom_len, 2139 .get_eeprom = dsa_slave_get_eeprom, 2140 .set_eeprom = dsa_slave_set_eeprom, 2141 .get_strings = dsa_slave_get_strings, 2142 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 2143 .get_sset_count = dsa_slave_get_sset_count, 2144 .get_eth_phy_stats = dsa_slave_get_eth_phy_stats, 2145 .get_eth_mac_stats = dsa_slave_get_eth_mac_stats, 2146 .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats, 2147 .get_rmon_stats = dsa_slave_get_rmon_stats, 2148 .set_wol = dsa_slave_set_wol, 2149 .get_wol = dsa_slave_get_wol, 2150 .set_eee = dsa_slave_set_eee, 2151 .get_eee = dsa_slave_get_eee, 2152 .get_link_ksettings = dsa_slave_get_link_ksettings, 2153 .set_link_ksettings = dsa_slave_set_link_ksettings, 2154 .get_pause_stats = dsa_slave_get_pause_stats, 2155 .get_pauseparam = dsa_slave_get_pauseparam, 2156 .set_pauseparam = dsa_slave_set_pauseparam, 2157 .get_rxnfc = dsa_slave_get_rxnfc, 2158 .set_rxnfc = dsa_slave_set_rxnfc, 2159 .get_ts_info = dsa_slave_get_ts_info, 2160 .self_test = dsa_slave_net_selftest, 2161 }; 2162 2163 static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = { 2164 .ieee_setapp = dsa_slave_dcbnl_ieee_setapp, 2165 .ieee_delapp = dsa_slave_dcbnl_ieee_delapp, 2166 }; 2167 2168 static void dsa_slave_get_stats64(struct net_device *dev, 2169 struct rtnl_link_stats64 *s) 2170 { 2171 struct dsa_port *dp = dsa_slave_to_port(dev); 2172 struct dsa_switch *ds = dp->ds; 2173 2174 if (ds->ops->get_stats64) 2175 ds->ops->get_stats64(ds, dp->index, s); 2176 else 2177 dev_get_tstats64(dev, s); 2178 } 2179 2180 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, 2181 struct net_device_path *path) 2182 { 2183 struct dsa_port *dp = dsa_slave_to_port(ctx->dev); 2184 struct net_device *master = dsa_port_to_master(dp); 2185 struct dsa_port *cpu_dp = dp->cpu_dp; 2186 2187 path->dev = ctx->dev; 2188 path->type = DEV_PATH_DSA; 2189 path->dsa.proto = cpu_dp->tag_ops->proto; 2190 path->dsa.port = dp->index; 2191 ctx->dev = master; 2192 2193 return 0; 2194 } 2195 2196 static const struct net_device_ops dsa_slave_netdev_ops = { 2197 .ndo_open = dsa_slave_open, 2198 .ndo_stop = dsa_slave_close, 2199 .ndo_start_xmit = dsa_slave_xmit, 2200 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 2201 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 2202 .ndo_set_mac_address = dsa_slave_set_mac_address, 2203 .ndo_fdb_dump = dsa_slave_fdb_dump, 2204 .ndo_eth_ioctl = dsa_slave_ioctl, 2205 .ndo_get_iflink = dsa_slave_get_iflink, 2206 #ifdef CONFIG_NET_POLL_CONTROLLER 2207 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 2208 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 2209 .ndo_poll_controller = dsa_slave_poll_controller, 2210 #endif 2211 .ndo_setup_tc = dsa_slave_setup_tc, 2212 .ndo_get_stats64 = dsa_slave_get_stats64, 2213 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 2214 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 2215 .ndo_change_mtu = dsa_slave_change_mtu, 2216 .ndo_fill_forward_path = dsa_slave_fill_forward_path, 2217 }; 2218 2219 static struct device_type dsa_type = { 2220 .name = "dsa", 2221 }; 2222 2223 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2224 { 2225 const struct dsa_port *dp = dsa_to_port(ds, port); 2226 2227 if (dp->pl) 2228 phylink_mac_change(dp->pl, up); 2229 } 2230 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2231 2232 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 2233 struct phylink_link_state *state) 2234 { 2235 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 2236 struct dsa_switch *ds = dp->ds; 2237 2238 /* No need to check that this operation is valid, the callback would 2239 * not be called if it was not. 2240 */ 2241 ds->ops->phylink_fixed_state(ds, dp->index, state); 2242 } 2243 2244 /* slave device setup *******************************************************/ 2245 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr, 2246 u32 flags) 2247 { 2248 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2249 struct dsa_switch *ds = dp->ds; 2250 2251 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 2252 if (!slave_dev->phydev) { 2253 netdev_err(slave_dev, "no phy at %d\n", addr); 2254 return -ENODEV; 2255 } 2256 2257 slave_dev->phydev->dev_flags |= flags; 2258 2259 return phylink_connect_phy(dp->pl, slave_dev->phydev); 2260 } 2261 2262 static int dsa_slave_phy_setup(struct net_device *slave_dev) 2263 { 2264 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2265 struct device_node *port_dn = dp->dn; 2266 struct dsa_switch *ds = dp->ds; 2267 u32 phy_flags = 0; 2268 int ret; 2269 2270 dp->pl_config.dev = &slave_dev->dev; 2271 dp->pl_config.type = PHYLINK_NETDEV; 2272 2273 /* The get_fixed_state callback takes precedence over polling the 2274 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2275 * this if the switch provides such a callback. 2276 */ 2277 if (ds->ops->phylink_fixed_state) { 2278 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 2279 dp->pl_config.poll_fixed_state = true; 2280 } 2281 2282 ret = dsa_port_phylink_create(dp); 2283 if (ret) 2284 return ret; 2285 2286 if (ds->ops->get_phy_flags) 2287 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2288 2289 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2290 if (ret == -ENODEV && ds->slave_mii_bus) { 2291 /* We could not connect to a designated PHY or SFP, so try to 2292 * use the switch internal MDIO bus instead 2293 */ 2294 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags); 2295 } 2296 if (ret) { 2297 netdev_err(slave_dev, "failed to connect to PHY: %pe\n", 2298 ERR_PTR(ret)); 2299 dsa_port_phylink_destroy(dp); 2300 } 2301 2302 return ret; 2303 } 2304 2305 void dsa_slave_setup_tagger(struct net_device *slave) 2306 { 2307 struct dsa_port *dp = dsa_slave_to_port(slave); 2308 struct net_device *master = dsa_port_to_master(dp); 2309 struct dsa_slave_priv *p = netdev_priv(slave); 2310 const struct dsa_port *cpu_dp = dp->cpu_dp; 2311 const struct dsa_switch *ds = dp->ds; 2312 2313 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2314 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2315 /* Try to save one extra realloc later in the TX path (in the master) 2316 * by also inheriting the master's needed headroom and tailroom. 2317 * The 8021q driver also does this. 2318 */ 2319 slave->needed_headroom += master->needed_headroom; 2320 slave->needed_tailroom += master->needed_tailroom; 2321 2322 p->xmit = cpu_dp->tag_ops->xmit; 2323 2324 slave->features = master->vlan_features | NETIF_F_HW_TC; 2325 slave->hw_features |= NETIF_F_HW_TC; 2326 slave->features |= NETIF_F_LLTX; 2327 if (slave->needed_tailroom) 2328 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2329 if (ds->needs_standalone_vlan_filtering) 2330 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2331 } 2332 2333 int dsa_slave_suspend(struct net_device *slave_dev) 2334 { 2335 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2336 2337 if (!netif_running(slave_dev)) 2338 return 0; 2339 2340 netif_device_detach(slave_dev); 2341 2342 rtnl_lock(); 2343 phylink_stop(dp->pl); 2344 rtnl_unlock(); 2345 2346 return 0; 2347 } 2348 2349 int dsa_slave_resume(struct net_device *slave_dev) 2350 { 2351 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2352 2353 if (!netif_running(slave_dev)) 2354 return 0; 2355 2356 netif_device_attach(slave_dev); 2357 2358 rtnl_lock(); 2359 phylink_start(dp->pl); 2360 rtnl_unlock(); 2361 2362 return 0; 2363 } 2364 2365 int dsa_slave_create(struct dsa_port *port) 2366 { 2367 struct net_device *master = dsa_port_to_master(port); 2368 struct dsa_switch *ds = port->ds; 2369 const char *name = port->name; 2370 struct net_device *slave_dev; 2371 struct dsa_slave_priv *p; 2372 int ret; 2373 2374 if (!ds->num_tx_queues) 2375 ds->num_tx_queues = 1; 2376 2377 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 2378 NET_NAME_UNKNOWN, ether_setup, 2379 ds->num_tx_queues, 1); 2380 if (slave_dev == NULL) 2381 return -ENOMEM; 2382 2383 slave_dev->rtnl_link_ops = &dsa_link_ops; 2384 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 2385 #if IS_ENABLED(CONFIG_DCB) 2386 slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops; 2387 #endif 2388 if (!is_zero_ether_addr(port->mac)) 2389 eth_hw_addr_set(slave_dev, port->mac); 2390 else 2391 eth_hw_addr_inherit(slave_dev, master); 2392 slave_dev->priv_flags |= IFF_NO_QUEUE; 2393 if (dsa_switch_supports_uc_filtering(ds)) 2394 slave_dev->priv_flags |= IFF_UNICAST_FLT; 2395 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 2396 if (ds->ops->port_max_mtu) 2397 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2398 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 2399 2400 SET_NETDEV_DEV(slave_dev, port->ds->dev); 2401 SET_NETDEV_DEVLINK_PORT(slave_dev, &port->devlink_port); 2402 slave_dev->dev.of_node = port->dn; 2403 slave_dev->vlan_features = master->vlan_features; 2404 2405 p = netdev_priv(slave_dev); 2406 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2407 if (!slave_dev->tstats) { 2408 free_netdev(slave_dev); 2409 return -ENOMEM; 2410 } 2411 2412 ret = gro_cells_init(&p->gcells, slave_dev); 2413 if (ret) 2414 goto out_free; 2415 2416 p->dp = port; 2417 INIT_LIST_HEAD(&p->mall_tc_list); 2418 port->slave = slave_dev; 2419 dsa_slave_setup_tagger(slave_dev); 2420 2421 netif_carrier_off(slave_dev); 2422 2423 ret = dsa_slave_phy_setup(slave_dev); 2424 if (ret) { 2425 netdev_err(slave_dev, 2426 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2427 ret, ds->dst->index, ds->index, port->index); 2428 goto out_gcells; 2429 } 2430 2431 rtnl_lock(); 2432 2433 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 2434 if (ret && ret != -EOPNOTSUPP) 2435 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2436 ret, ETH_DATA_LEN, port->index); 2437 2438 ret = register_netdevice(slave_dev); 2439 if (ret) { 2440 netdev_err(master, "error %d registering interface %s\n", 2441 ret, slave_dev->name); 2442 rtnl_unlock(); 2443 goto out_phy; 2444 } 2445 2446 if (IS_ENABLED(CONFIG_DCB)) { 2447 ret = dsa_slave_dcbnl_init(slave_dev); 2448 if (ret) { 2449 netdev_err(slave_dev, 2450 "failed to initialize DCB: %pe\n", 2451 ERR_PTR(ret)); 2452 rtnl_unlock(); 2453 goto out_unregister; 2454 } 2455 } 2456 2457 ret = netdev_upper_dev_link(master, slave_dev, NULL); 2458 2459 rtnl_unlock(); 2460 2461 if (ret) 2462 goto out_unregister; 2463 2464 return 0; 2465 2466 out_unregister: 2467 unregister_netdev(slave_dev); 2468 out_phy: 2469 rtnl_lock(); 2470 phylink_disconnect_phy(p->dp->pl); 2471 rtnl_unlock(); 2472 dsa_port_phylink_destroy(p->dp); 2473 out_gcells: 2474 gro_cells_destroy(&p->gcells); 2475 out_free: 2476 free_percpu(slave_dev->tstats); 2477 free_netdev(slave_dev); 2478 port->slave = NULL; 2479 return ret; 2480 } 2481 2482 void dsa_slave_destroy(struct net_device *slave_dev) 2483 { 2484 struct net_device *master = dsa_slave_to_master(slave_dev); 2485 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2486 struct dsa_slave_priv *p = netdev_priv(slave_dev); 2487 2488 netif_carrier_off(slave_dev); 2489 rtnl_lock(); 2490 netdev_upper_dev_unlink(master, slave_dev); 2491 unregister_netdevice(slave_dev); 2492 phylink_disconnect_phy(dp->pl); 2493 rtnl_unlock(); 2494 2495 dsa_port_phylink_destroy(dp); 2496 gro_cells_destroy(&p->gcells); 2497 free_percpu(slave_dev->tstats); 2498 free_netdev(slave_dev); 2499 } 2500 2501 int dsa_slave_change_master(struct net_device *dev, struct net_device *master, 2502 struct netlink_ext_ack *extack) 2503 { 2504 struct net_device *old_master = dsa_slave_to_master(dev); 2505 struct dsa_port *dp = dsa_slave_to_port(dev); 2506 struct dsa_switch *ds = dp->ds; 2507 struct net_device *upper; 2508 struct list_head *iter; 2509 int err; 2510 2511 if (master == old_master) 2512 return 0; 2513 2514 if (!ds->ops->port_change_master) { 2515 NL_SET_ERR_MSG_MOD(extack, 2516 "Driver does not support changing DSA master"); 2517 return -EOPNOTSUPP; 2518 } 2519 2520 if (!netdev_uses_dsa(master)) { 2521 NL_SET_ERR_MSG_MOD(extack, 2522 "Interface not eligible as DSA master"); 2523 return -EOPNOTSUPP; 2524 } 2525 2526 netdev_for_each_upper_dev_rcu(master, upper, iter) { 2527 if (dsa_slave_dev_check(upper)) 2528 continue; 2529 if (netif_is_bridge_master(upper)) 2530 continue; 2531 NL_SET_ERR_MSG_MOD(extack, "Cannot join master with unknown uppers"); 2532 return -EOPNOTSUPP; 2533 } 2534 2535 /* Since we allow live-changing the DSA master, plus we auto-open the 2536 * DSA master when the user port opens => we need to ensure that the 2537 * new DSA master is open too. 2538 */ 2539 if (dev->flags & IFF_UP) { 2540 err = dev_open(master, extack); 2541 if (err) 2542 return err; 2543 } 2544 2545 netdev_upper_dev_unlink(old_master, dev); 2546 2547 err = netdev_upper_dev_link(master, dev, extack); 2548 if (err) 2549 goto out_revert_old_master_unlink; 2550 2551 err = dsa_port_change_master(dp, master, extack); 2552 if (err) 2553 goto out_revert_master_link; 2554 2555 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2556 err = dsa_slave_change_mtu(dev, dev->mtu); 2557 if (err && err != -EOPNOTSUPP) { 2558 netdev_warn(dev, 2559 "nonfatal error updating MTU with new master: %pe\n", 2560 ERR_PTR(err)); 2561 } 2562 2563 /* If the port doesn't have its own MAC address and relies on the DSA 2564 * master's one, inherit it again from the new DSA master. 2565 */ 2566 if (is_zero_ether_addr(dp->mac)) 2567 eth_hw_addr_inherit(dev, master); 2568 2569 return 0; 2570 2571 out_revert_master_link: 2572 netdev_upper_dev_unlink(master, dev); 2573 out_revert_old_master_unlink: 2574 netdev_upper_dev_link(old_master, dev, NULL); 2575 return err; 2576 } 2577 2578 bool dsa_slave_dev_check(const struct net_device *dev) 2579 { 2580 return dev->netdev_ops == &dsa_slave_netdev_ops; 2581 } 2582 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 2583 2584 static int dsa_slave_changeupper(struct net_device *dev, 2585 struct netdev_notifier_changeupper_info *info) 2586 { 2587 struct dsa_port *dp = dsa_slave_to_port(dev); 2588 struct netlink_ext_ack *extack; 2589 int err = NOTIFY_DONE; 2590 2591 if (!dsa_slave_dev_check(dev)) 2592 return err; 2593 2594 extack = netdev_notifier_info_to_extack(&info->info); 2595 2596 if (netif_is_bridge_master(info->upper_dev)) { 2597 if (info->linking) { 2598 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2599 if (!err) 2600 dsa_bridge_mtu_normalization(dp); 2601 if (err == -EOPNOTSUPP) { 2602 if (extack && !extack->_msg) 2603 NL_SET_ERR_MSG_MOD(extack, 2604 "Offloading not supported"); 2605 err = 0; 2606 } 2607 err = notifier_from_errno(err); 2608 } else { 2609 dsa_port_bridge_leave(dp, info->upper_dev); 2610 err = NOTIFY_OK; 2611 } 2612 } else if (netif_is_lag_master(info->upper_dev)) { 2613 if (info->linking) { 2614 err = dsa_port_lag_join(dp, info->upper_dev, 2615 info->upper_info, extack); 2616 if (err == -EOPNOTSUPP) { 2617 NL_SET_ERR_MSG_MOD(info->info.extack, 2618 "Offloading not supported"); 2619 err = 0; 2620 } 2621 err = notifier_from_errno(err); 2622 } else { 2623 dsa_port_lag_leave(dp, info->upper_dev); 2624 err = NOTIFY_OK; 2625 } 2626 } else if (is_hsr_master(info->upper_dev)) { 2627 if (info->linking) { 2628 err = dsa_port_hsr_join(dp, info->upper_dev); 2629 if (err == -EOPNOTSUPP) { 2630 NL_SET_ERR_MSG_MOD(info->info.extack, 2631 "Offloading not supported"); 2632 err = 0; 2633 } 2634 err = notifier_from_errno(err); 2635 } else { 2636 dsa_port_hsr_leave(dp, info->upper_dev); 2637 err = NOTIFY_OK; 2638 } 2639 } 2640 2641 return err; 2642 } 2643 2644 static int dsa_slave_prechangeupper(struct net_device *dev, 2645 struct netdev_notifier_changeupper_info *info) 2646 { 2647 struct dsa_port *dp = dsa_slave_to_port(dev); 2648 2649 if (!dsa_slave_dev_check(dev)) 2650 return NOTIFY_DONE; 2651 2652 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2653 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2654 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2655 dsa_port_pre_lag_leave(dp, info->upper_dev); 2656 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be 2657 * meaningfully enslaved to a bridge yet 2658 */ 2659 2660 return NOTIFY_DONE; 2661 } 2662 2663 static int 2664 dsa_slave_lag_changeupper(struct net_device *dev, 2665 struct netdev_notifier_changeupper_info *info) 2666 { 2667 struct net_device *lower; 2668 struct list_head *iter; 2669 int err = NOTIFY_DONE; 2670 struct dsa_port *dp; 2671 2672 if (!netif_is_lag_master(dev)) 2673 return err; 2674 2675 netdev_for_each_lower_dev(dev, lower, iter) { 2676 if (!dsa_slave_dev_check(lower)) 2677 continue; 2678 2679 dp = dsa_slave_to_port(lower); 2680 if (!dp->lag) 2681 /* Software LAG */ 2682 continue; 2683 2684 err = dsa_slave_changeupper(lower, info); 2685 if (notifier_to_errno(err)) 2686 break; 2687 } 2688 2689 return err; 2690 } 2691 2692 /* Same as dsa_slave_lag_changeupper() except that it calls 2693 * dsa_slave_prechangeupper() 2694 */ 2695 static int 2696 dsa_slave_lag_prechangeupper(struct net_device *dev, 2697 struct netdev_notifier_changeupper_info *info) 2698 { 2699 struct net_device *lower; 2700 struct list_head *iter; 2701 int err = NOTIFY_DONE; 2702 struct dsa_port *dp; 2703 2704 if (!netif_is_lag_master(dev)) 2705 return err; 2706 2707 netdev_for_each_lower_dev(dev, lower, iter) { 2708 if (!dsa_slave_dev_check(lower)) 2709 continue; 2710 2711 dp = dsa_slave_to_port(lower); 2712 if (!dp->lag) 2713 /* Software LAG */ 2714 continue; 2715 2716 err = dsa_slave_prechangeupper(lower, info); 2717 if (notifier_to_errno(err)) 2718 break; 2719 } 2720 2721 return err; 2722 } 2723 2724 static int 2725 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 2726 struct netdev_notifier_changeupper_info *info) 2727 { 2728 struct netlink_ext_ack *ext_ack; 2729 struct net_device *slave, *br; 2730 struct dsa_port *dp; 2731 2732 ext_ack = netdev_notifier_info_to_extack(&info->info); 2733 2734 if (!is_vlan_dev(dev)) 2735 return NOTIFY_DONE; 2736 2737 slave = vlan_dev_real_dev(dev); 2738 if (!dsa_slave_dev_check(slave)) 2739 return NOTIFY_DONE; 2740 2741 dp = dsa_slave_to_port(slave); 2742 br = dsa_port_bridge_dev_get(dp); 2743 if (!br) 2744 return NOTIFY_DONE; 2745 2746 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 2747 if (br_vlan_enabled(br) && 2748 netif_is_bridge_master(info->upper_dev) && info->linking) { 2749 NL_SET_ERR_MSG_MOD(ext_ack, 2750 "Cannot enslave VLAN device into VLAN aware bridge"); 2751 return notifier_from_errno(-EINVAL); 2752 } 2753 2754 return NOTIFY_DONE; 2755 } 2756 2757 static int 2758 dsa_slave_check_8021q_upper(struct net_device *dev, 2759 struct netdev_notifier_changeupper_info *info) 2760 { 2761 struct dsa_port *dp = dsa_slave_to_port(dev); 2762 struct net_device *br = dsa_port_bridge_dev_get(dp); 2763 struct bridge_vlan_info br_info; 2764 struct netlink_ext_ack *extack; 2765 int err = NOTIFY_DONE; 2766 u16 vid; 2767 2768 if (!br || !br_vlan_enabled(br)) 2769 return NOTIFY_DONE; 2770 2771 extack = netdev_notifier_info_to_extack(&info->info); 2772 vid = vlan_dev_vlan_id(info->upper_dev); 2773 2774 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2775 * device, respectively the VID is not found, returning 2776 * 0 means success, which is a failure for us here. 2777 */ 2778 err = br_vlan_get_info(br, vid, &br_info); 2779 if (err == 0) { 2780 NL_SET_ERR_MSG_MOD(extack, 2781 "This VLAN is already configured by the bridge"); 2782 return notifier_from_errno(-EBUSY); 2783 } 2784 2785 return NOTIFY_DONE; 2786 } 2787 2788 static int 2789 dsa_slave_prechangeupper_sanity_check(struct net_device *dev, 2790 struct netdev_notifier_changeupper_info *info) 2791 { 2792 struct dsa_switch *ds; 2793 struct dsa_port *dp; 2794 int err; 2795 2796 if (!dsa_slave_dev_check(dev)) 2797 return dsa_prevent_bridging_8021q_upper(dev, info); 2798 2799 dp = dsa_slave_to_port(dev); 2800 ds = dp->ds; 2801 2802 if (ds->ops->port_prechangeupper) { 2803 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2804 if (err) 2805 return notifier_from_errno(err); 2806 } 2807 2808 if (is_vlan_dev(info->upper_dev)) 2809 return dsa_slave_check_8021q_upper(dev, info); 2810 2811 return NOTIFY_DONE; 2812 } 2813 2814 /* To be eligible as a DSA master, a LAG must have all lower interfaces be 2815 * eligible DSA masters. Additionally, all LAG slaves must be DSA masters of 2816 * switches in the same switch tree. 2817 */ 2818 static int dsa_lag_master_validate(struct net_device *lag_dev, 2819 struct netlink_ext_ack *extack) 2820 { 2821 struct net_device *lower1, *lower2; 2822 struct list_head *iter1, *iter2; 2823 2824 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 2825 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 2826 if (!netdev_uses_dsa(lower1) || 2827 !netdev_uses_dsa(lower2)) { 2828 NL_SET_ERR_MSG_MOD(extack, 2829 "All LAG ports must be eligible as DSA masters"); 2830 return notifier_from_errno(-EINVAL); 2831 } 2832 2833 if (lower1 == lower2) 2834 continue; 2835 2836 if (!dsa_port_tree_same(lower1->dsa_ptr, 2837 lower2->dsa_ptr)) { 2838 NL_SET_ERR_MSG_MOD(extack, 2839 "LAG contains DSA masters of disjoint switch trees"); 2840 return notifier_from_errno(-EINVAL); 2841 } 2842 } 2843 } 2844 2845 return NOTIFY_DONE; 2846 } 2847 2848 static int 2849 dsa_master_prechangeupper_sanity_check(struct net_device *master, 2850 struct netdev_notifier_changeupper_info *info) 2851 { 2852 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2853 2854 if (!netdev_uses_dsa(master)) 2855 return NOTIFY_DONE; 2856 2857 if (!info->linking) 2858 return NOTIFY_DONE; 2859 2860 /* Allow DSA switch uppers */ 2861 if (dsa_slave_dev_check(info->upper_dev)) 2862 return NOTIFY_DONE; 2863 2864 /* Allow bridge uppers of DSA masters, subject to further 2865 * restrictions in dsa_bridge_prechangelower_sanity_check() 2866 */ 2867 if (netif_is_bridge_master(info->upper_dev)) 2868 return NOTIFY_DONE; 2869 2870 /* Allow LAG uppers, subject to further restrictions in 2871 * dsa_lag_master_prechangelower_sanity_check() 2872 */ 2873 if (netif_is_lag_master(info->upper_dev)) 2874 return dsa_lag_master_validate(info->upper_dev, extack); 2875 2876 NL_SET_ERR_MSG_MOD(extack, 2877 "DSA master cannot join unknown upper interfaces"); 2878 return notifier_from_errno(-EBUSY); 2879 } 2880 2881 static int 2882 dsa_lag_master_prechangelower_sanity_check(struct net_device *dev, 2883 struct netdev_notifier_changeupper_info *info) 2884 { 2885 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2886 struct net_device *lag_dev = info->upper_dev; 2887 struct net_device *lower; 2888 struct list_head *iter; 2889 2890 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 2891 return NOTIFY_DONE; 2892 2893 if (!info->linking) 2894 return NOTIFY_DONE; 2895 2896 if (!netdev_uses_dsa(dev)) { 2897 NL_SET_ERR_MSG(extack, 2898 "Only DSA masters can join a LAG DSA master"); 2899 return notifier_from_errno(-EINVAL); 2900 } 2901 2902 netdev_for_each_lower_dev(lag_dev, lower, iter) { 2903 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 2904 NL_SET_ERR_MSG(extack, 2905 "Interface is DSA master for a different switch tree than this LAG"); 2906 return notifier_from_errno(-EINVAL); 2907 } 2908 2909 break; 2910 } 2911 2912 return NOTIFY_DONE; 2913 } 2914 2915 /* Don't allow bridging of DSA masters, since the bridge layer rx_handler 2916 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 2917 * chance to strip off and parse the DSA switch tag protocol header (the bridge 2918 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 2919 * frames). 2920 * The only case where that would not be an issue is when bridging can already 2921 * be offloaded, such as when the DSA master is itself a DSA or plain switchdev 2922 * port, and is bridged only with other ports from the same hardware device. 2923 */ 2924 static int 2925 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 2926 struct netdev_notifier_changeupper_info *info) 2927 { 2928 struct net_device *br = info->upper_dev; 2929 struct netlink_ext_ack *extack; 2930 struct net_device *lower; 2931 struct list_head *iter; 2932 2933 if (!netif_is_bridge_master(br)) 2934 return NOTIFY_DONE; 2935 2936 if (!info->linking) 2937 return NOTIFY_DONE; 2938 2939 extack = netdev_notifier_info_to_extack(&info->info); 2940 2941 netdev_for_each_lower_dev(br, lower, iter) { 2942 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 2943 continue; 2944 2945 if (!netdev_port_same_parent_id(lower, new_lower)) { 2946 NL_SET_ERR_MSG(extack, 2947 "Cannot do software bridging with a DSA master"); 2948 return notifier_from_errno(-EINVAL); 2949 } 2950 } 2951 2952 return NOTIFY_DONE; 2953 } 2954 2955 static void dsa_tree_migrate_ports_from_lag_master(struct dsa_switch_tree *dst, 2956 struct net_device *lag_dev) 2957 { 2958 struct net_device *new_master = dsa_tree_find_first_master(dst); 2959 struct dsa_port *dp; 2960 int err; 2961 2962 dsa_tree_for_each_user_port(dp, dst) { 2963 if (dsa_port_to_master(dp) != lag_dev) 2964 continue; 2965 2966 err = dsa_slave_change_master(dp->slave, new_master, NULL); 2967 if (err) { 2968 netdev_err(dp->slave, 2969 "failed to restore master to %s: %pe\n", 2970 new_master->name, ERR_PTR(err)); 2971 } 2972 } 2973 } 2974 2975 static int dsa_master_lag_join(struct net_device *master, 2976 struct net_device *lag_dev, 2977 struct netdev_lag_upper_info *uinfo, 2978 struct netlink_ext_ack *extack) 2979 { 2980 struct dsa_port *cpu_dp = master->dsa_ptr; 2981 struct dsa_switch_tree *dst = cpu_dp->dst; 2982 struct dsa_port *dp; 2983 int err; 2984 2985 err = dsa_master_lag_setup(lag_dev, cpu_dp, uinfo, extack); 2986 if (err) 2987 return err; 2988 2989 dsa_tree_for_each_user_port(dp, dst) { 2990 if (dsa_port_to_master(dp) != master) 2991 continue; 2992 2993 err = dsa_slave_change_master(dp->slave, lag_dev, extack); 2994 if (err) 2995 goto restore; 2996 } 2997 2998 return 0; 2999 3000 restore: 3001 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3002 if (dsa_port_to_master(dp) != lag_dev) 3003 continue; 3004 3005 err = dsa_slave_change_master(dp->slave, master, NULL); 3006 if (err) { 3007 netdev_err(dp->slave, 3008 "failed to restore master to %s: %pe\n", 3009 master->name, ERR_PTR(err)); 3010 } 3011 } 3012 3013 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3014 3015 return err; 3016 } 3017 3018 static void dsa_master_lag_leave(struct net_device *master, 3019 struct net_device *lag_dev) 3020 { 3021 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3022 struct dsa_switch_tree *dst = cpu_dp->dst; 3023 struct dsa_port *new_cpu_dp = NULL; 3024 struct net_device *lower; 3025 struct list_head *iter; 3026 3027 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3028 if (netdev_uses_dsa(lower)) { 3029 new_cpu_dp = lower->dsa_ptr; 3030 break; 3031 } 3032 } 3033 3034 if (new_cpu_dp) { 3035 /* Update the CPU port of the user ports still under the LAG 3036 * so that dsa_port_to_master() continues to work properly 3037 */ 3038 dsa_tree_for_each_user_port(dp, dst) 3039 if (dsa_port_to_master(dp) == lag_dev) 3040 dp->cpu_dp = new_cpu_dp; 3041 3042 /* Update the index of the virtual CPU port to match the lowest 3043 * physical CPU port 3044 */ 3045 lag_dev->dsa_ptr = new_cpu_dp; 3046 wmb(); 3047 } else { 3048 /* If the LAG DSA master has no ports left, migrate back all 3049 * user ports to the first physical CPU port 3050 */ 3051 dsa_tree_migrate_ports_from_lag_master(dst, lag_dev); 3052 } 3053 3054 /* This DSA master has left its LAG in any case, so let 3055 * the CPU port leave the hardware LAG as well 3056 */ 3057 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3058 } 3059 3060 static int dsa_master_changeupper(struct net_device *dev, 3061 struct netdev_notifier_changeupper_info *info) 3062 { 3063 struct netlink_ext_ack *extack; 3064 int err = NOTIFY_DONE; 3065 3066 if (!netdev_uses_dsa(dev)) 3067 return err; 3068 3069 extack = netdev_notifier_info_to_extack(&info->info); 3070 3071 if (netif_is_lag_master(info->upper_dev)) { 3072 if (info->linking) { 3073 err = dsa_master_lag_join(dev, info->upper_dev, 3074 info->upper_info, extack); 3075 err = notifier_from_errno(err); 3076 } else { 3077 dsa_master_lag_leave(dev, info->upper_dev); 3078 err = NOTIFY_OK; 3079 } 3080 } 3081 3082 return err; 3083 } 3084 3085 static int dsa_slave_netdevice_event(struct notifier_block *nb, 3086 unsigned long event, void *ptr) 3087 { 3088 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3089 3090 switch (event) { 3091 case NETDEV_PRECHANGEUPPER: { 3092 struct netdev_notifier_changeupper_info *info = ptr; 3093 int err; 3094 3095 err = dsa_slave_prechangeupper_sanity_check(dev, info); 3096 if (notifier_to_errno(err)) 3097 return err; 3098 3099 err = dsa_master_prechangeupper_sanity_check(dev, info); 3100 if (notifier_to_errno(err)) 3101 return err; 3102 3103 err = dsa_lag_master_prechangelower_sanity_check(dev, info); 3104 if (notifier_to_errno(err)) 3105 return err; 3106 3107 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3108 if (notifier_to_errno(err)) 3109 return err; 3110 3111 err = dsa_slave_prechangeupper(dev, ptr); 3112 if (notifier_to_errno(err)) 3113 return err; 3114 3115 err = dsa_slave_lag_prechangeupper(dev, ptr); 3116 if (notifier_to_errno(err)) 3117 return err; 3118 3119 break; 3120 } 3121 case NETDEV_CHANGEUPPER: { 3122 int err; 3123 3124 err = dsa_slave_changeupper(dev, ptr); 3125 if (notifier_to_errno(err)) 3126 return err; 3127 3128 err = dsa_slave_lag_changeupper(dev, ptr); 3129 if (notifier_to_errno(err)) 3130 return err; 3131 3132 err = dsa_master_changeupper(dev, ptr); 3133 if (notifier_to_errno(err)) 3134 return err; 3135 3136 break; 3137 } 3138 case NETDEV_CHANGELOWERSTATE: { 3139 struct netdev_notifier_changelowerstate_info *info = ptr; 3140 struct dsa_port *dp; 3141 int err = 0; 3142 3143 if (dsa_slave_dev_check(dev)) { 3144 dp = dsa_slave_to_port(dev); 3145 3146 err = dsa_port_lag_change(dp, info->lower_state_info); 3147 } 3148 3149 /* Mirror LAG port events on DSA masters that are in 3150 * a LAG towards their respective switch CPU ports 3151 */ 3152 if (netdev_uses_dsa(dev)) { 3153 dp = dev->dsa_ptr; 3154 3155 err = dsa_port_lag_change(dp, info->lower_state_info); 3156 } 3157 3158 return notifier_from_errno(err); 3159 } 3160 case NETDEV_CHANGE: 3161 case NETDEV_UP: { 3162 /* Track state of master port. 3163 * DSA driver may require the master port (and indirectly 3164 * the tagger) to be available for some special operation. 3165 */ 3166 if (netdev_uses_dsa(dev)) { 3167 struct dsa_port *cpu_dp = dev->dsa_ptr; 3168 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3169 3170 /* Track when the master port is UP */ 3171 dsa_tree_master_oper_state_change(dst, dev, 3172 netif_oper_up(dev)); 3173 3174 /* Track when the master port is ready and can accept 3175 * packet. 3176 * NETDEV_UP event is not enough to flag a port as ready. 3177 * We also have to wait for linkwatch_do_dev to dev_activate 3178 * and emit a NETDEV_CHANGE event. 3179 * We check if a master port is ready by checking if the dev 3180 * have a qdisc assigned and is not noop. 3181 */ 3182 dsa_tree_master_admin_state_change(dst, dev, 3183 !qdisc_tx_is_noop(dev)); 3184 3185 return NOTIFY_OK; 3186 } 3187 3188 return NOTIFY_DONE; 3189 } 3190 case NETDEV_GOING_DOWN: { 3191 struct dsa_port *dp, *cpu_dp; 3192 struct dsa_switch_tree *dst; 3193 LIST_HEAD(close_list); 3194 3195 if (!netdev_uses_dsa(dev)) 3196 return NOTIFY_DONE; 3197 3198 cpu_dp = dev->dsa_ptr; 3199 dst = cpu_dp->ds->dst; 3200 3201 dsa_tree_master_admin_state_change(dst, dev, false); 3202 3203 list_for_each_entry(dp, &dst->ports, list) { 3204 if (!dsa_port_is_user(dp)) 3205 continue; 3206 3207 if (dp->cpu_dp != cpu_dp) 3208 continue; 3209 3210 list_add(&dp->slave->close_list, &close_list); 3211 } 3212 3213 dev_close_many(&close_list, true); 3214 3215 return NOTIFY_OK; 3216 } 3217 default: 3218 break; 3219 } 3220 3221 return NOTIFY_DONE; 3222 } 3223 3224 static void 3225 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3226 { 3227 struct switchdev_notifier_fdb_info info = {}; 3228 3229 info.addr = switchdev_work->addr; 3230 info.vid = switchdev_work->vid; 3231 info.offloaded = true; 3232 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3233 switchdev_work->orig_dev, &info.info, NULL); 3234 } 3235 3236 static void dsa_slave_switchdev_event_work(struct work_struct *work) 3237 { 3238 struct dsa_switchdev_event_work *switchdev_work = 3239 container_of(work, struct dsa_switchdev_event_work, work); 3240 const unsigned char *addr = switchdev_work->addr; 3241 struct net_device *dev = switchdev_work->dev; 3242 u16 vid = switchdev_work->vid; 3243 struct dsa_switch *ds; 3244 struct dsa_port *dp; 3245 int err; 3246 3247 dp = dsa_slave_to_port(dev); 3248 ds = dp->ds; 3249 3250 switch (switchdev_work->event) { 3251 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3252 if (switchdev_work->host_addr) 3253 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3254 else if (dp->lag) 3255 err = dsa_port_lag_fdb_add(dp, addr, vid); 3256 else 3257 err = dsa_port_fdb_add(dp, addr, vid); 3258 if (err) { 3259 dev_err(ds->dev, 3260 "port %d failed to add %pM vid %d to fdb: %d\n", 3261 dp->index, addr, vid, err); 3262 break; 3263 } 3264 dsa_fdb_offload_notify(switchdev_work); 3265 break; 3266 3267 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3268 if (switchdev_work->host_addr) 3269 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3270 else if (dp->lag) 3271 err = dsa_port_lag_fdb_del(dp, addr, vid); 3272 else 3273 err = dsa_port_fdb_del(dp, addr, vid); 3274 if (err) { 3275 dev_err(ds->dev, 3276 "port %d failed to delete %pM vid %d from fdb: %d\n", 3277 dp->index, addr, vid, err); 3278 } 3279 3280 break; 3281 } 3282 3283 kfree(switchdev_work); 3284 } 3285 3286 static bool dsa_foreign_dev_check(const struct net_device *dev, 3287 const struct net_device *foreign_dev) 3288 { 3289 const struct dsa_port *dp = dsa_slave_to_port(dev); 3290 struct dsa_switch_tree *dst = dp->ds->dst; 3291 3292 if (netif_is_bridge_master(foreign_dev)) 3293 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3294 3295 if (netif_is_bridge_port(foreign_dev)) 3296 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3297 3298 /* Everything else is foreign */ 3299 return true; 3300 } 3301 3302 static int dsa_slave_fdb_event(struct net_device *dev, 3303 struct net_device *orig_dev, 3304 unsigned long event, const void *ctx, 3305 const struct switchdev_notifier_fdb_info *fdb_info) 3306 { 3307 struct dsa_switchdev_event_work *switchdev_work; 3308 struct dsa_port *dp = dsa_slave_to_port(dev); 3309 bool host_addr = fdb_info->is_local; 3310 struct dsa_switch *ds = dp->ds; 3311 3312 if (ctx && ctx != dp) 3313 return 0; 3314 3315 if (!dp->bridge) 3316 return 0; 3317 3318 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3319 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3320 return 0; 3321 3322 /* FDB entries learned by the software bridge or by foreign 3323 * bridge ports should be installed as host addresses only if 3324 * the driver requests assisted learning. 3325 */ 3326 if (!ds->assisted_learning_on_cpu_port) 3327 return 0; 3328 } 3329 3330 /* Also treat FDB entries on foreign interfaces bridged with us as host 3331 * addresses. 3332 */ 3333 if (dsa_foreign_dev_check(dev, orig_dev)) 3334 host_addr = true; 3335 3336 /* Check early that we're not doing work in vain. 3337 * Host addresses on LAG ports still require regular FDB ops, 3338 * since the CPU port isn't in a LAG. 3339 */ 3340 if (dp->lag && !host_addr) { 3341 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3342 return -EOPNOTSUPP; 3343 } else { 3344 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3345 return -EOPNOTSUPP; 3346 } 3347 3348 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3349 if (!switchdev_work) 3350 return -ENOMEM; 3351 3352 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3353 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3354 orig_dev->name, fdb_info->addr, fdb_info->vid, 3355 host_addr ? " as host address" : ""); 3356 3357 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work); 3358 switchdev_work->event = event; 3359 switchdev_work->dev = dev; 3360 switchdev_work->orig_dev = orig_dev; 3361 3362 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3363 switchdev_work->vid = fdb_info->vid; 3364 switchdev_work->host_addr = host_addr; 3365 3366 dsa_schedule_work(&switchdev_work->work); 3367 3368 return 0; 3369 } 3370 3371 /* Called under rcu_read_lock() */ 3372 static int dsa_slave_switchdev_event(struct notifier_block *unused, 3373 unsigned long event, void *ptr) 3374 { 3375 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3376 int err; 3377 3378 switch (event) { 3379 case SWITCHDEV_PORT_ATTR_SET: 3380 err = switchdev_handle_port_attr_set(dev, ptr, 3381 dsa_slave_dev_check, 3382 dsa_slave_port_attr_set); 3383 return notifier_from_errno(err); 3384 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3385 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3386 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3387 dsa_slave_dev_check, 3388 dsa_foreign_dev_check, 3389 dsa_slave_fdb_event); 3390 return notifier_from_errno(err); 3391 default: 3392 return NOTIFY_DONE; 3393 } 3394 3395 return NOTIFY_OK; 3396 } 3397 3398 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 3399 unsigned long event, void *ptr) 3400 { 3401 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3402 int err; 3403 3404 switch (event) { 3405 case SWITCHDEV_PORT_OBJ_ADD: 3406 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3407 dsa_slave_dev_check, 3408 dsa_foreign_dev_check, 3409 dsa_slave_port_obj_add); 3410 return notifier_from_errno(err); 3411 case SWITCHDEV_PORT_OBJ_DEL: 3412 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3413 dsa_slave_dev_check, 3414 dsa_foreign_dev_check, 3415 dsa_slave_port_obj_del); 3416 return notifier_from_errno(err); 3417 case SWITCHDEV_PORT_ATTR_SET: 3418 err = switchdev_handle_port_attr_set(dev, ptr, 3419 dsa_slave_dev_check, 3420 dsa_slave_port_attr_set); 3421 return notifier_from_errno(err); 3422 } 3423 3424 return NOTIFY_DONE; 3425 } 3426 3427 static struct notifier_block dsa_slave_nb __read_mostly = { 3428 .notifier_call = dsa_slave_netdevice_event, 3429 }; 3430 3431 struct notifier_block dsa_slave_switchdev_notifier = { 3432 .notifier_call = dsa_slave_switchdev_event, 3433 }; 3434 3435 struct notifier_block dsa_slave_switchdev_blocking_notifier = { 3436 .notifier_call = dsa_slave_switchdev_blocking_event, 3437 }; 3438 3439 int dsa_slave_register_notifier(void) 3440 { 3441 struct notifier_block *nb; 3442 int err; 3443 3444 err = register_netdevice_notifier(&dsa_slave_nb); 3445 if (err) 3446 return err; 3447 3448 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 3449 if (err) 3450 goto err_switchdev_nb; 3451 3452 nb = &dsa_slave_switchdev_blocking_notifier; 3453 err = register_switchdev_blocking_notifier(nb); 3454 if (err) 3455 goto err_switchdev_blocking_nb; 3456 3457 return 0; 3458 3459 err_switchdev_blocking_nb: 3460 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3461 err_switchdev_nb: 3462 unregister_netdevice_notifier(&dsa_slave_nb); 3463 return err; 3464 } 3465 3466 void dsa_slave_unregister_notifier(void) 3467 { 3468 struct notifier_block *nb; 3469 int err; 3470 3471 nb = &dsa_slave_switchdev_blocking_notifier; 3472 err = unregister_switchdev_blocking_notifier(nb); 3473 if (err) 3474 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3475 3476 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3477 if (err) 3478 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3479 3480 err = unregister_netdevice_notifier(&dsa_slave_nb); 3481 if (err) 3482 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 3483 } 3484