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_irq(&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_irq(&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 struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) 2169 { 2170 struct dsa_port *dp = dsa_slave_to_port(dev); 2171 2172 return &dp->devlink_port; 2173 } 2174 2175 static void dsa_slave_get_stats64(struct net_device *dev, 2176 struct rtnl_link_stats64 *s) 2177 { 2178 struct dsa_port *dp = dsa_slave_to_port(dev); 2179 struct dsa_switch *ds = dp->ds; 2180 2181 if (ds->ops->get_stats64) 2182 ds->ops->get_stats64(ds, dp->index, s); 2183 else 2184 dev_get_tstats64(dev, s); 2185 } 2186 2187 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, 2188 struct net_device_path *path) 2189 { 2190 struct dsa_port *dp = dsa_slave_to_port(ctx->dev); 2191 struct net_device *master = dsa_port_to_master(dp); 2192 struct dsa_port *cpu_dp = dp->cpu_dp; 2193 2194 path->dev = ctx->dev; 2195 path->type = DEV_PATH_DSA; 2196 path->dsa.proto = cpu_dp->tag_ops->proto; 2197 path->dsa.port = dp->index; 2198 ctx->dev = master; 2199 2200 return 0; 2201 } 2202 2203 static const struct net_device_ops dsa_slave_netdev_ops = { 2204 .ndo_open = dsa_slave_open, 2205 .ndo_stop = dsa_slave_close, 2206 .ndo_start_xmit = dsa_slave_xmit, 2207 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 2208 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 2209 .ndo_set_mac_address = dsa_slave_set_mac_address, 2210 .ndo_fdb_dump = dsa_slave_fdb_dump, 2211 .ndo_eth_ioctl = dsa_slave_ioctl, 2212 .ndo_get_iflink = dsa_slave_get_iflink, 2213 #ifdef CONFIG_NET_POLL_CONTROLLER 2214 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 2215 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 2216 .ndo_poll_controller = dsa_slave_poll_controller, 2217 #endif 2218 .ndo_setup_tc = dsa_slave_setup_tc, 2219 .ndo_get_stats64 = dsa_slave_get_stats64, 2220 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 2221 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 2222 .ndo_get_devlink_port = dsa_slave_get_devlink_port, 2223 .ndo_change_mtu = dsa_slave_change_mtu, 2224 .ndo_fill_forward_path = dsa_slave_fill_forward_path, 2225 }; 2226 2227 static struct device_type dsa_type = { 2228 .name = "dsa", 2229 }; 2230 2231 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2232 { 2233 const struct dsa_port *dp = dsa_to_port(ds, port); 2234 2235 if (dp->pl) 2236 phylink_mac_change(dp->pl, up); 2237 } 2238 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2239 2240 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 2241 struct phylink_link_state *state) 2242 { 2243 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 2244 struct dsa_switch *ds = dp->ds; 2245 2246 /* No need to check that this operation is valid, the callback would 2247 * not be called if it was not. 2248 */ 2249 ds->ops->phylink_fixed_state(ds, dp->index, state); 2250 } 2251 2252 /* slave device setup *******************************************************/ 2253 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr, 2254 u32 flags) 2255 { 2256 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2257 struct dsa_switch *ds = dp->ds; 2258 2259 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 2260 if (!slave_dev->phydev) { 2261 netdev_err(slave_dev, "no phy at %d\n", addr); 2262 return -ENODEV; 2263 } 2264 2265 slave_dev->phydev->dev_flags |= flags; 2266 2267 return phylink_connect_phy(dp->pl, slave_dev->phydev); 2268 } 2269 2270 static int dsa_slave_phy_setup(struct net_device *slave_dev) 2271 { 2272 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2273 struct device_node *port_dn = dp->dn; 2274 struct dsa_switch *ds = dp->ds; 2275 u32 phy_flags = 0; 2276 int ret; 2277 2278 dp->pl_config.dev = &slave_dev->dev; 2279 dp->pl_config.type = PHYLINK_NETDEV; 2280 2281 /* The get_fixed_state callback takes precedence over polling the 2282 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2283 * this if the switch provides such a callback. 2284 */ 2285 if (ds->ops->phylink_fixed_state) { 2286 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 2287 dp->pl_config.poll_fixed_state = true; 2288 } 2289 2290 ret = dsa_port_phylink_create(dp); 2291 if (ret) 2292 return ret; 2293 2294 if (ds->ops->get_phy_flags) 2295 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2296 2297 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2298 if (ret == -ENODEV && ds->slave_mii_bus) { 2299 /* We could not connect to a designated PHY or SFP, so try to 2300 * use the switch internal MDIO bus instead 2301 */ 2302 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags); 2303 } 2304 if (ret) { 2305 netdev_err(slave_dev, "failed to connect to PHY: %pe\n", 2306 ERR_PTR(ret)); 2307 dsa_port_phylink_destroy(dp); 2308 } 2309 2310 return ret; 2311 } 2312 2313 void dsa_slave_setup_tagger(struct net_device *slave) 2314 { 2315 struct dsa_port *dp = dsa_slave_to_port(slave); 2316 struct net_device *master = dsa_port_to_master(dp); 2317 struct dsa_slave_priv *p = netdev_priv(slave); 2318 const struct dsa_port *cpu_dp = dp->cpu_dp; 2319 const struct dsa_switch *ds = dp->ds; 2320 2321 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2322 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2323 /* Try to save one extra realloc later in the TX path (in the master) 2324 * by also inheriting the master's needed headroom and tailroom. 2325 * The 8021q driver also does this. 2326 */ 2327 slave->needed_headroom += master->needed_headroom; 2328 slave->needed_tailroom += master->needed_tailroom; 2329 2330 p->xmit = cpu_dp->tag_ops->xmit; 2331 2332 slave->features = master->vlan_features | NETIF_F_HW_TC; 2333 slave->hw_features |= NETIF_F_HW_TC; 2334 slave->features |= NETIF_F_LLTX; 2335 if (slave->needed_tailroom) 2336 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2337 if (ds->needs_standalone_vlan_filtering) 2338 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2339 } 2340 2341 int dsa_slave_suspend(struct net_device *slave_dev) 2342 { 2343 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2344 2345 if (!netif_running(slave_dev)) 2346 return 0; 2347 2348 netif_device_detach(slave_dev); 2349 2350 rtnl_lock(); 2351 phylink_stop(dp->pl); 2352 rtnl_unlock(); 2353 2354 return 0; 2355 } 2356 2357 int dsa_slave_resume(struct net_device *slave_dev) 2358 { 2359 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2360 2361 if (!netif_running(slave_dev)) 2362 return 0; 2363 2364 netif_device_attach(slave_dev); 2365 2366 rtnl_lock(); 2367 phylink_start(dp->pl); 2368 rtnl_unlock(); 2369 2370 return 0; 2371 } 2372 2373 int dsa_slave_create(struct dsa_port *port) 2374 { 2375 struct net_device *master = dsa_port_to_master(port); 2376 struct dsa_switch *ds = port->ds; 2377 const char *name = port->name; 2378 struct net_device *slave_dev; 2379 struct dsa_slave_priv *p; 2380 int ret; 2381 2382 if (!ds->num_tx_queues) 2383 ds->num_tx_queues = 1; 2384 2385 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 2386 NET_NAME_UNKNOWN, ether_setup, 2387 ds->num_tx_queues, 1); 2388 if (slave_dev == NULL) 2389 return -ENOMEM; 2390 2391 slave_dev->rtnl_link_ops = &dsa_link_ops; 2392 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 2393 #if IS_ENABLED(CONFIG_DCB) 2394 slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops; 2395 #endif 2396 if (!is_zero_ether_addr(port->mac)) 2397 eth_hw_addr_set(slave_dev, port->mac); 2398 else 2399 eth_hw_addr_inherit(slave_dev, master); 2400 slave_dev->priv_flags |= IFF_NO_QUEUE; 2401 if (dsa_switch_supports_uc_filtering(ds)) 2402 slave_dev->priv_flags |= IFF_UNICAST_FLT; 2403 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 2404 if (ds->ops->port_max_mtu) 2405 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2406 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 2407 2408 SET_NETDEV_DEV(slave_dev, port->ds->dev); 2409 slave_dev->dev.of_node = port->dn; 2410 slave_dev->vlan_features = master->vlan_features; 2411 2412 p = netdev_priv(slave_dev); 2413 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2414 if (!slave_dev->tstats) { 2415 free_netdev(slave_dev); 2416 return -ENOMEM; 2417 } 2418 2419 ret = gro_cells_init(&p->gcells, slave_dev); 2420 if (ret) 2421 goto out_free; 2422 2423 p->dp = port; 2424 INIT_LIST_HEAD(&p->mall_tc_list); 2425 port->slave = slave_dev; 2426 dsa_slave_setup_tagger(slave_dev); 2427 2428 netif_carrier_off(slave_dev); 2429 2430 ret = dsa_slave_phy_setup(slave_dev); 2431 if (ret) { 2432 netdev_err(slave_dev, 2433 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2434 ret, ds->dst->index, ds->index, port->index); 2435 goto out_gcells; 2436 } 2437 2438 rtnl_lock(); 2439 2440 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 2441 if (ret && ret != -EOPNOTSUPP) 2442 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2443 ret, ETH_DATA_LEN, port->index); 2444 2445 ret = register_netdevice(slave_dev); 2446 if (ret) { 2447 netdev_err(master, "error %d registering interface %s\n", 2448 ret, slave_dev->name); 2449 rtnl_unlock(); 2450 goto out_phy; 2451 } 2452 2453 if (IS_ENABLED(CONFIG_DCB)) { 2454 ret = dsa_slave_dcbnl_init(slave_dev); 2455 if (ret) { 2456 netdev_err(slave_dev, 2457 "failed to initialize DCB: %pe\n", 2458 ERR_PTR(ret)); 2459 rtnl_unlock(); 2460 goto out_unregister; 2461 } 2462 } 2463 2464 ret = netdev_upper_dev_link(master, slave_dev, NULL); 2465 2466 rtnl_unlock(); 2467 2468 if (ret) 2469 goto out_unregister; 2470 2471 return 0; 2472 2473 out_unregister: 2474 unregister_netdev(slave_dev); 2475 out_phy: 2476 rtnl_lock(); 2477 phylink_disconnect_phy(p->dp->pl); 2478 rtnl_unlock(); 2479 dsa_port_phylink_destroy(p->dp); 2480 out_gcells: 2481 gro_cells_destroy(&p->gcells); 2482 out_free: 2483 free_percpu(slave_dev->tstats); 2484 free_netdev(slave_dev); 2485 port->slave = NULL; 2486 return ret; 2487 } 2488 2489 void dsa_slave_destroy(struct net_device *slave_dev) 2490 { 2491 struct net_device *master = dsa_slave_to_master(slave_dev); 2492 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2493 struct dsa_slave_priv *p = netdev_priv(slave_dev); 2494 2495 netif_carrier_off(slave_dev); 2496 rtnl_lock(); 2497 netdev_upper_dev_unlink(master, slave_dev); 2498 unregister_netdevice(slave_dev); 2499 phylink_disconnect_phy(dp->pl); 2500 rtnl_unlock(); 2501 2502 dsa_port_phylink_destroy(dp); 2503 gro_cells_destroy(&p->gcells); 2504 free_percpu(slave_dev->tstats); 2505 free_netdev(slave_dev); 2506 } 2507 2508 int dsa_slave_change_master(struct net_device *dev, struct net_device *master, 2509 struct netlink_ext_ack *extack) 2510 { 2511 struct net_device *old_master = dsa_slave_to_master(dev); 2512 struct dsa_port *dp = dsa_slave_to_port(dev); 2513 struct dsa_switch *ds = dp->ds; 2514 struct net_device *upper; 2515 struct list_head *iter; 2516 int err; 2517 2518 if (master == old_master) 2519 return 0; 2520 2521 if (!ds->ops->port_change_master) { 2522 NL_SET_ERR_MSG_MOD(extack, 2523 "Driver does not support changing DSA master"); 2524 return -EOPNOTSUPP; 2525 } 2526 2527 if (!netdev_uses_dsa(master)) { 2528 NL_SET_ERR_MSG_MOD(extack, 2529 "Interface not eligible as DSA master"); 2530 return -EOPNOTSUPP; 2531 } 2532 2533 netdev_for_each_upper_dev_rcu(master, upper, iter) { 2534 if (dsa_slave_dev_check(upper)) 2535 continue; 2536 if (netif_is_bridge_master(upper)) 2537 continue; 2538 NL_SET_ERR_MSG_MOD(extack, "Cannot join master with unknown uppers"); 2539 return -EOPNOTSUPP; 2540 } 2541 2542 /* Since we allow live-changing the DSA master, plus we auto-open the 2543 * DSA master when the user port opens => we need to ensure that the 2544 * new DSA master is open too. 2545 */ 2546 if (dev->flags & IFF_UP) { 2547 err = dev_open(master, extack); 2548 if (err) 2549 return err; 2550 } 2551 2552 netdev_upper_dev_unlink(old_master, dev); 2553 2554 err = netdev_upper_dev_link(master, dev, extack); 2555 if (err) 2556 goto out_revert_old_master_unlink; 2557 2558 err = dsa_port_change_master(dp, master, extack); 2559 if (err) 2560 goto out_revert_master_link; 2561 2562 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2563 err = dsa_slave_change_mtu(dev, dev->mtu); 2564 if (err && err != -EOPNOTSUPP) { 2565 netdev_warn(dev, 2566 "nonfatal error updating MTU with new master: %pe\n", 2567 ERR_PTR(err)); 2568 } 2569 2570 /* If the port doesn't have its own MAC address and relies on the DSA 2571 * master's one, inherit it again from the new DSA master. 2572 */ 2573 if (is_zero_ether_addr(dp->mac)) 2574 eth_hw_addr_inherit(dev, master); 2575 2576 return 0; 2577 2578 out_revert_master_link: 2579 netdev_upper_dev_unlink(master, dev); 2580 out_revert_old_master_unlink: 2581 netdev_upper_dev_link(old_master, dev, NULL); 2582 return err; 2583 } 2584 2585 bool dsa_slave_dev_check(const struct net_device *dev) 2586 { 2587 return dev->netdev_ops == &dsa_slave_netdev_ops; 2588 } 2589 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 2590 2591 static int dsa_slave_changeupper(struct net_device *dev, 2592 struct netdev_notifier_changeupper_info *info) 2593 { 2594 struct dsa_port *dp = dsa_slave_to_port(dev); 2595 struct netlink_ext_ack *extack; 2596 int err = NOTIFY_DONE; 2597 2598 if (!dsa_slave_dev_check(dev)) 2599 return err; 2600 2601 extack = netdev_notifier_info_to_extack(&info->info); 2602 2603 if (netif_is_bridge_master(info->upper_dev)) { 2604 if (info->linking) { 2605 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2606 if (!err) 2607 dsa_bridge_mtu_normalization(dp); 2608 if (err == -EOPNOTSUPP) { 2609 if (extack && !extack->_msg) 2610 NL_SET_ERR_MSG_MOD(extack, 2611 "Offloading not supported"); 2612 err = 0; 2613 } 2614 err = notifier_from_errno(err); 2615 } else { 2616 dsa_port_bridge_leave(dp, info->upper_dev); 2617 err = NOTIFY_OK; 2618 } 2619 } else if (netif_is_lag_master(info->upper_dev)) { 2620 if (info->linking) { 2621 err = dsa_port_lag_join(dp, info->upper_dev, 2622 info->upper_info, extack); 2623 if (err == -EOPNOTSUPP) { 2624 NL_SET_ERR_MSG_MOD(info->info.extack, 2625 "Offloading not supported"); 2626 err = 0; 2627 } 2628 err = notifier_from_errno(err); 2629 } else { 2630 dsa_port_lag_leave(dp, info->upper_dev); 2631 err = NOTIFY_OK; 2632 } 2633 } else if (is_hsr_master(info->upper_dev)) { 2634 if (info->linking) { 2635 err = dsa_port_hsr_join(dp, info->upper_dev); 2636 if (err == -EOPNOTSUPP) { 2637 NL_SET_ERR_MSG_MOD(info->info.extack, 2638 "Offloading not supported"); 2639 err = 0; 2640 } 2641 err = notifier_from_errno(err); 2642 } else { 2643 dsa_port_hsr_leave(dp, info->upper_dev); 2644 err = NOTIFY_OK; 2645 } 2646 } 2647 2648 return err; 2649 } 2650 2651 static int dsa_slave_prechangeupper(struct net_device *dev, 2652 struct netdev_notifier_changeupper_info *info) 2653 { 2654 struct dsa_port *dp = dsa_slave_to_port(dev); 2655 2656 if (!dsa_slave_dev_check(dev)) 2657 return NOTIFY_DONE; 2658 2659 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2660 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2661 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2662 dsa_port_pre_lag_leave(dp, info->upper_dev); 2663 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be 2664 * meaningfully enslaved to a bridge yet 2665 */ 2666 2667 return NOTIFY_DONE; 2668 } 2669 2670 static int 2671 dsa_slave_lag_changeupper(struct net_device *dev, 2672 struct netdev_notifier_changeupper_info *info) 2673 { 2674 struct net_device *lower; 2675 struct list_head *iter; 2676 int err = NOTIFY_DONE; 2677 struct dsa_port *dp; 2678 2679 if (!netif_is_lag_master(dev)) 2680 return err; 2681 2682 netdev_for_each_lower_dev(dev, lower, iter) { 2683 if (!dsa_slave_dev_check(lower)) 2684 continue; 2685 2686 dp = dsa_slave_to_port(lower); 2687 if (!dp->lag) 2688 /* Software LAG */ 2689 continue; 2690 2691 err = dsa_slave_changeupper(lower, info); 2692 if (notifier_to_errno(err)) 2693 break; 2694 } 2695 2696 return err; 2697 } 2698 2699 /* Same as dsa_slave_lag_changeupper() except that it calls 2700 * dsa_slave_prechangeupper() 2701 */ 2702 static int 2703 dsa_slave_lag_prechangeupper(struct net_device *dev, 2704 struct netdev_notifier_changeupper_info *info) 2705 { 2706 struct net_device *lower; 2707 struct list_head *iter; 2708 int err = NOTIFY_DONE; 2709 struct dsa_port *dp; 2710 2711 if (!netif_is_lag_master(dev)) 2712 return err; 2713 2714 netdev_for_each_lower_dev(dev, lower, iter) { 2715 if (!dsa_slave_dev_check(lower)) 2716 continue; 2717 2718 dp = dsa_slave_to_port(lower); 2719 if (!dp->lag) 2720 /* Software LAG */ 2721 continue; 2722 2723 err = dsa_slave_prechangeupper(lower, info); 2724 if (notifier_to_errno(err)) 2725 break; 2726 } 2727 2728 return err; 2729 } 2730 2731 static int 2732 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 2733 struct netdev_notifier_changeupper_info *info) 2734 { 2735 struct netlink_ext_ack *ext_ack; 2736 struct net_device *slave, *br; 2737 struct dsa_port *dp; 2738 2739 ext_ack = netdev_notifier_info_to_extack(&info->info); 2740 2741 if (!is_vlan_dev(dev)) 2742 return NOTIFY_DONE; 2743 2744 slave = vlan_dev_real_dev(dev); 2745 if (!dsa_slave_dev_check(slave)) 2746 return NOTIFY_DONE; 2747 2748 dp = dsa_slave_to_port(slave); 2749 br = dsa_port_bridge_dev_get(dp); 2750 if (!br) 2751 return NOTIFY_DONE; 2752 2753 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 2754 if (br_vlan_enabled(br) && 2755 netif_is_bridge_master(info->upper_dev) && info->linking) { 2756 NL_SET_ERR_MSG_MOD(ext_ack, 2757 "Cannot enslave VLAN device into VLAN aware bridge"); 2758 return notifier_from_errno(-EINVAL); 2759 } 2760 2761 return NOTIFY_DONE; 2762 } 2763 2764 static int 2765 dsa_slave_check_8021q_upper(struct net_device *dev, 2766 struct netdev_notifier_changeupper_info *info) 2767 { 2768 struct dsa_port *dp = dsa_slave_to_port(dev); 2769 struct net_device *br = dsa_port_bridge_dev_get(dp); 2770 struct bridge_vlan_info br_info; 2771 struct netlink_ext_ack *extack; 2772 int err = NOTIFY_DONE; 2773 u16 vid; 2774 2775 if (!br || !br_vlan_enabled(br)) 2776 return NOTIFY_DONE; 2777 2778 extack = netdev_notifier_info_to_extack(&info->info); 2779 vid = vlan_dev_vlan_id(info->upper_dev); 2780 2781 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2782 * device, respectively the VID is not found, returning 2783 * 0 means success, which is a failure for us here. 2784 */ 2785 err = br_vlan_get_info(br, vid, &br_info); 2786 if (err == 0) { 2787 NL_SET_ERR_MSG_MOD(extack, 2788 "This VLAN is already configured by the bridge"); 2789 return notifier_from_errno(-EBUSY); 2790 } 2791 2792 return NOTIFY_DONE; 2793 } 2794 2795 static int 2796 dsa_slave_prechangeupper_sanity_check(struct net_device *dev, 2797 struct netdev_notifier_changeupper_info *info) 2798 { 2799 struct dsa_switch *ds; 2800 struct dsa_port *dp; 2801 int err; 2802 2803 if (!dsa_slave_dev_check(dev)) 2804 return dsa_prevent_bridging_8021q_upper(dev, info); 2805 2806 dp = dsa_slave_to_port(dev); 2807 ds = dp->ds; 2808 2809 if (ds->ops->port_prechangeupper) { 2810 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2811 if (err) 2812 return notifier_from_errno(err); 2813 } 2814 2815 if (is_vlan_dev(info->upper_dev)) 2816 return dsa_slave_check_8021q_upper(dev, info); 2817 2818 return NOTIFY_DONE; 2819 } 2820 2821 /* To be eligible as a DSA master, a LAG must have all lower interfaces be 2822 * eligible DSA masters. Additionally, all LAG slaves must be DSA masters of 2823 * switches in the same switch tree. 2824 */ 2825 static int dsa_lag_master_validate(struct net_device *lag_dev, 2826 struct netlink_ext_ack *extack) 2827 { 2828 struct net_device *lower1, *lower2; 2829 struct list_head *iter1, *iter2; 2830 2831 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 2832 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 2833 if (!netdev_uses_dsa(lower1) || 2834 !netdev_uses_dsa(lower2)) { 2835 NL_SET_ERR_MSG_MOD(extack, 2836 "All LAG ports must be eligible as DSA masters"); 2837 return notifier_from_errno(-EINVAL); 2838 } 2839 2840 if (lower1 == lower2) 2841 continue; 2842 2843 if (!dsa_port_tree_same(lower1->dsa_ptr, 2844 lower2->dsa_ptr)) { 2845 NL_SET_ERR_MSG_MOD(extack, 2846 "LAG contains DSA masters of disjoint switch trees"); 2847 return notifier_from_errno(-EINVAL); 2848 } 2849 } 2850 } 2851 2852 return NOTIFY_DONE; 2853 } 2854 2855 static int 2856 dsa_master_prechangeupper_sanity_check(struct net_device *master, 2857 struct netdev_notifier_changeupper_info *info) 2858 { 2859 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2860 2861 if (!netdev_uses_dsa(master)) 2862 return NOTIFY_DONE; 2863 2864 if (!info->linking) 2865 return NOTIFY_DONE; 2866 2867 /* Allow DSA switch uppers */ 2868 if (dsa_slave_dev_check(info->upper_dev)) 2869 return NOTIFY_DONE; 2870 2871 /* Allow bridge uppers of DSA masters, subject to further 2872 * restrictions in dsa_bridge_prechangelower_sanity_check() 2873 */ 2874 if (netif_is_bridge_master(info->upper_dev)) 2875 return NOTIFY_DONE; 2876 2877 /* Allow LAG uppers, subject to further restrictions in 2878 * dsa_lag_master_prechangelower_sanity_check() 2879 */ 2880 if (netif_is_lag_master(info->upper_dev)) 2881 return dsa_lag_master_validate(info->upper_dev, extack); 2882 2883 NL_SET_ERR_MSG_MOD(extack, 2884 "DSA master cannot join unknown upper interfaces"); 2885 return notifier_from_errno(-EBUSY); 2886 } 2887 2888 static int 2889 dsa_lag_master_prechangelower_sanity_check(struct net_device *dev, 2890 struct netdev_notifier_changeupper_info *info) 2891 { 2892 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2893 struct net_device *lag_dev = info->upper_dev; 2894 struct net_device *lower; 2895 struct list_head *iter; 2896 2897 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 2898 return NOTIFY_DONE; 2899 2900 if (!info->linking) 2901 return NOTIFY_DONE; 2902 2903 if (!netdev_uses_dsa(dev)) { 2904 NL_SET_ERR_MSG(extack, 2905 "Only DSA masters can join a LAG DSA master"); 2906 return notifier_from_errno(-EINVAL); 2907 } 2908 2909 netdev_for_each_lower_dev(lag_dev, lower, iter) { 2910 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 2911 NL_SET_ERR_MSG(extack, 2912 "Interface is DSA master for a different switch tree than this LAG"); 2913 return notifier_from_errno(-EINVAL); 2914 } 2915 2916 break; 2917 } 2918 2919 return NOTIFY_DONE; 2920 } 2921 2922 /* Don't allow bridging of DSA masters, since the bridge layer rx_handler 2923 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 2924 * chance to strip off and parse the DSA switch tag protocol header (the bridge 2925 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 2926 * frames). 2927 * The only case where that would not be an issue is when bridging can already 2928 * be offloaded, such as when the DSA master is itself a DSA or plain switchdev 2929 * port, and is bridged only with other ports from the same hardware device. 2930 */ 2931 static int 2932 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 2933 struct netdev_notifier_changeupper_info *info) 2934 { 2935 struct net_device *br = info->upper_dev; 2936 struct netlink_ext_ack *extack; 2937 struct net_device *lower; 2938 struct list_head *iter; 2939 2940 if (!netif_is_bridge_master(br)) 2941 return NOTIFY_DONE; 2942 2943 if (!info->linking) 2944 return NOTIFY_DONE; 2945 2946 extack = netdev_notifier_info_to_extack(&info->info); 2947 2948 netdev_for_each_lower_dev(br, lower, iter) { 2949 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 2950 continue; 2951 2952 if (!netdev_port_same_parent_id(lower, new_lower)) { 2953 NL_SET_ERR_MSG(extack, 2954 "Cannot do software bridging with a DSA master"); 2955 return notifier_from_errno(-EINVAL); 2956 } 2957 } 2958 2959 return NOTIFY_DONE; 2960 } 2961 2962 static void dsa_tree_migrate_ports_from_lag_master(struct dsa_switch_tree *dst, 2963 struct net_device *lag_dev) 2964 { 2965 struct net_device *new_master = dsa_tree_find_first_master(dst); 2966 struct dsa_port *dp; 2967 int err; 2968 2969 dsa_tree_for_each_user_port(dp, dst) { 2970 if (dsa_port_to_master(dp) != lag_dev) 2971 continue; 2972 2973 err = dsa_slave_change_master(dp->slave, new_master, NULL); 2974 if (err) { 2975 netdev_err(dp->slave, 2976 "failed to restore master to %s: %pe\n", 2977 new_master->name, ERR_PTR(err)); 2978 } 2979 } 2980 } 2981 2982 static int dsa_master_lag_join(struct net_device *master, 2983 struct net_device *lag_dev, 2984 struct netdev_lag_upper_info *uinfo, 2985 struct netlink_ext_ack *extack) 2986 { 2987 struct dsa_port *cpu_dp = master->dsa_ptr; 2988 struct dsa_switch_tree *dst = cpu_dp->dst; 2989 struct dsa_port *dp; 2990 int err; 2991 2992 err = dsa_master_lag_setup(lag_dev, cpu_dp, uinfo, extack); 2993 if (err) 2994 return err; 2995 2996 dsa_tree_for_each_user_port(dp, dst) { 2997 if (dsa_port_to_master(dp) != master) 2998 continue; 2999 3000 err = dsa_slave_change_master(dp->slave, lag_dev, extack); 3001 if (err) 3002 goto restore; 3003 } 3004 3005 return 0; 3006 3007 restore: 3008 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3009 if (dsa_port_to_master(dp) != lag_dev) 3010 continue; 3011 3012 err = dsa_slave_change_master(dp->slave, master, NULL); 3013 if (err) { 3014 netdev_err(dp->slave, 3015 "failed to restore master to %s: %pe\n", 3016 master->name, ERR_PTR(err)); 3017 } 3018 } 3019 3020 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3021 3022 return err; 3023 } 3024 3025 static void dsa_master_lag_leave(struct net_device *master, 3026 struct net_device *lag_dev) 3027 { 3028 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3029 struct dsa_switch_tree *dst = cpu_dp->dst; 3030 struct dsa_port *new_cpu_dp = NULL; 3031 struct net_device *lower; 3032 struct list_head *iter; 3033 3034 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3035 if (netdev_uses_dsa(lower)) { 3036 new_cpu_dp = lower->dsa_ptr; 3037 break; 3038 } 3039 } 3040 3041 if (new_cpu_dp) { 3042 /* Update the CPU port of the user ports still under the LAG 3043 * so that dsa_port_to_master() continues to work properly 3044 */ 3045 dsa_tree_for_each_user_port(dp, dst) 3046 if (dsa_port_to_master(dp) == lag_dev) 3047 dp->cpu_dp = new_cpu_dp; 3048 3049 /* Update the index of the virtual CPU port to match the lowest 3050 * physical CPU port 3051 */ 3052 lag_dev->dsa_ptr = new_cpu_dp; 3053 wmb(); 3054 } else { 3055 /* If the LAG DSA master has no ports left, migrate back all 3056 * user ports to the first physical CPU port 3057 */ 3058 dsa_tree_migrate_ports_from_lag_master(dst, lag_dev); 3059 } 3060 3061 /* This DSA master has left its LAG in any case, so let 3062 * the CPU port leave the hardware LAG as well 3063 */ 3064 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3065 } 3066 3067 static int dsa_master_changeupper(struct net_device *dev, 3068 struct netdev_notifier_changeupper_info *info) 3069 { 3070 struct netlink_ext_ack *extack; 3071 int err = NOTIFY_DONE; 3072 3073 if (!netdev_uses_dsa(dev)) 3074 return err; 3075 3076 extack = netdev_notifier_info_to_extack(&info->info); 3077 3078 if (netif_is_lag_master(info->upper_dev)) { 3079 if (info->linking) { 3080 err = dsa_master_lag_join(dev, info->upper_dev, 3081 info->upper_info, extack); 3082 err = notifier_from_errno(err); 3083 } else { 3084 dsa_master_lag_leave(dev, info->upper_dev); 3085 err = NOTIFY_OK; 3086 } 3087 } 3088 3089 return err; 3090 } 3091 3092 static int dsa_slave_netdevice_event(struct notifier_block *nb, 3093 unsigned long event, void *ptr) 3094 { 3095 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3096 3097 switch (event) { 3098 case NETDEV_PRECHANGEUPPER: { 3099 struct netdev_notifier_changeupper_info *info = ptr; 3100 int err; 3101 3102 err = dsa_slave_prechangeupper_sanity_check(dev, info); 3103 if (notifier_to_errno(err)) 3104 return err; 3105 3106 err = dsa_master_prechangeupper_sanity_check(dev, info); 3107 if (notifier_to_errno(err)) 3108 return err; 3109 3110 err = dsa_lag_master_prechangelower_sanity_check(dev, info); 3111 if (notifier_to_errno(err)) 3112 return err; 3113 3114 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3115 if (notifier_to_errno(err)) 3116 return err; 3117 3118 err = dsa_slave_prechangeupper(dev, ptr); 3119 if (notifier_to_errno(err)) 3120 return err; 3121 3122 err = dsa_slave_lag_prechangeupper(dev, ptr); 3123 if (notifier_to_errno(err)) 3124 return err; 3125 3126 break; 3127 } 3128 case NETDEV_CHANGEUPPER: { 3129 int err; 3130 3131 err = dsa_slave_changeupper(dev, ptr); 3132 if (notifier_to_errno(err)) 3133 return err; 3134 3135 err = dsa_slave_lag_changeupper(dev, ptr); 3136 if (notifier_to_errno(err)) 3137 return err; 3138 3139 err = dsa_master_changeupper(dev, ptr); 3140 if (notifier_to_errno(err)) 3141 return err; 3142 3143 break; 3144 } 3145 case NETDEV_CHANGELOWERSTATE: { 3146 struct netdev_notifier_changelowerstate_info *info = ptr; 3147 struct dsa_port *dp; 3148 int err; 3149 3150 if (dsa_slave_dev_check(dev)) { 3151 dp = dsa_slave_to_port(dev); 3152 3153 err = dsa_port_lag_change(dp, info->lower_state_info); 3154 } 3155 3156 /* Mirror LAG port events on DSA masters that are in 3157 * a LAG towards their respective switch CPU ports 3158 */ 3159 if (netdev_uses_dsa(dev)) { 3160 dp = dev->dsa_ptr; 3161 3162 err = dsa_port_lag_change(dp, info->lower_state_info); 3163 } 3164 3165 return notifier_from_errno(err); 3166 } 3167 case NETDEV_CHANGE: 3168 case NETDEV_UP: { 3169 /* Track state of master port. 3170 * DSA driver may require the master port (and indirectly 3171 * the tagger) to be available for some special operation. 3172 */ 3173 if (netdev_uses_dsa(dev)) { 3174 struct dsa_port *cpu_dp = dev->dsa_ptr; 3175 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3176 3177 /* Track when the master port is UP */ 3178 dsa_tree_master_oper_state_change(dst, dev, 3179 netif_oper_up(dev)); 3180 3181 /* Track when the master port is ready and can accept 3182 * packet. 3183 * NETDEV_UP event is not enough to flag a port as ready. 3184 * We also have to wait for linkwatch_do_dev to dev_activate 3185 * and emit a NETDEV_CHANGE event. 3186 * We check if a master port is ready by checking if the dev 3187 * have a qdisc assigned and is not noop. 3188 */ 3189 dsa_tree_master_admin_state_change(dst, dev, 3190 !qdisc_tx_is_noop(dev)); 3191 3192 return NOTIFY_OK; 3193 } 3194 3195 return NOTIFY_DONE; 3196 } 3197 case NETDEV_GOING_DOWN: { 3198 struct dsa_port *dp, *cpu_dp; 3199 struct dsa_switch_tree *dst; 3200 LIST_HEAD(close_list); 3201 3202 if (!netdev_uses_dsa(dev)) 3203 return NOTIFY_DONE; 3204 3205 cpu_dp = dev->dsa_ptr; 3206 dst = cpu_dp->ds->dst; 3207 3208 dsa_tree_master_admin_state_change(dst, dev, false); 3209 3210 list_for_each_entry(dp, &dst->ports, list) { 3211 if (!dsa_port_is_user(dp)) 3212 continue; 3213 3214 if (dp->cpu_dp != cpu_dp) 3215 continue; 3216 3217 list_add(&dp->slave->close_list, &close_list); 3218 } 3219 3220 dev_close_many(&close_list, true); 3221 3222 return NOTIFY_OK; 3223 } 3224 default: 3225 break; 3226 } 3227 3228 return NOTIFY_DONE; 3229 } 3230 3231 static void 3232 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3233 { 3234 struct switchdev_notifier_fdb_info info = {}; 3235 3236 info.addr = switchdev_work->addr; 3237 info.vid = switchdev_work->vid; 3238 info.offloaded = true; 3239 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3240 switchdev_work->orig_dev, &info.info, NULL); 3241 } 3242 3243 static void dsa_slave_switchdev_event_work(struct work_struct *work) 3244 { 3245 struct dsa_switchdev_event_work *switchdev_work = 3246 container_of(work, struct dsa_switchdev_event_work, work); 3247 const unsigned char *addr = switchdev_work->addr; 3248 struct net_device *dev = switchdev_work->dev; 3249 u16 vid = switchdev_work->vid; 3250 struct dsa_switch *ds; 3251 struct dsa_port *dp; 3252 int err; 3253 3254 dp = dsa_slave_to_port(dev); 3255 ds = dp->ds; 3256 3257 switch (switchdev_work->event) { 3258 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3259 if (switchdev_work->host_addr) 3260 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3261 else if (dp->lag) 3262 err = dsa_port_lag_fdb_add(dp, addr, vid); 3263 else 3264 err = dsa_port_fdb_add(dp, addr, vid); 3265 if (err) { 3266 dev_err(ds->dev, 3267 "port %d failed to add %pM vid %d to fdb: %d\n", 3268 dp->index, addr, vid, err); 3269 break; 3270 } 3271 dsa_fdb_offload_notify(switchdev_work); 3272 break; 3273 3274 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3275 if (switchdev_work->host_addr) 3276 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3277 else if (dp->lag) 3278 err = dsa_port_lag_fdb_del(dp, addr, vid); 3279 else 3280 err = dsa_port_fdb_del(dp, addr, vid); 3281 if (err) { 3282 dev_err(ds->dev, 3283 "port %d failed to delete %pM vid %d from fdb: %d\n", 3284 dp->index, addr, vid, err); 3285 } 3286 3287 break; 3288 } 3289 3290 kfree(switchdev_work); 3291 } 3292 3293 static bool dsa_foreign_dev_check(const struct net_device *dev, 3294 const struct net_device *foreign_dev) 3295 { 3296 const struct dsa_port *dp = dsa_slave_to_port(dev); 3297 struct dsa_switch_tree *dst = dp->ds->dst; 3298 3299 if (netif_is_bridge_master(foreign_dev)) 3300 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3301 3302 if (netif_is_bridge_port(foreign_dev)) 3303 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3304 3305 /* Everything else is foreign */ 3306 return true; 3307 } 3308 3309 static int dsa_slave_fdb_event(struct net_device *dev, 3310 struct net_device *orig_dev, 3311 unsigned long event, const void *ctx, 3312 const struct switchdev_notifier_fdb_info *fdb_info) 3313 { 3314 struct dsa_switchdev_event_work *switchdev_work; 3315 struct dsa_port *dp = dsa_slave_to_port(dev); 3316 bool host_addr = fdb_info->is_local; 3317 struct dsa_switch *ds = dp->ds; 3318 3319 if (ctx && ctx != dp) 3320 return 0; 3321 3322 if (!dp->bridge) 3323 return 0; 3324 3325 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3326 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3327 return 0; 3328 3329 /* FDB entries learned by the software bridge or by foreign 3330 * bridge ports should be installed as host addresses only if 3331 * the driver requests assisted learning. 3332 */ 3333 if (!ds->assisted_learning_on_cpu_port) 3334 return 0; 3335 } 3336 3337 /* Also treat FDB entries on foreign interfaces bridged with us as host 3338 * addresses. 3339 */ 3340 if (dsa_foreign_dev_check(dev, orig_dev)) 3341 host_addr = true; 3342 3343 /* Check early that we're not doing work in vain. 3344 * Host addresses on LAG ports still require regular FDB ops, 3345 * since the CPU port isn't in a LAG. 3346 */ 3347 if (dp->lag && !host_addr) { 3348 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3349 return -EOPNOTSUPP; 3350 } else { 3351 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3352 return -EOPNOTSUPP; 3353 } 3354 3355 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3356 if (!switchdev_work) 3357 return -ENOMEM; 3358 3359 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3360 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3361 orig_dev->name, fdb_info->addr, fdb_info->vid, 3362 host_addr ? " as host address" : ""); 3363 3364 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work); 3365 switchdev_work->event = event; 3366 switchdev_work->dev = dev; 3367 switchdev_work->orig_dev = orig_dev; 3368 3369 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3370 switchdev_work->vid = fdb_info->vid; 3371 switchdev_work->host_addr = host_addr; 3372 3373 dsa_schedule_work(&switchdev_work->work); 3374 3375 return 0; 3376 } 3377 3378 /* Called under rcu_read_lock() */ 3379 static int dsa_slave_switchdev_event(struct notifier_block *unused, 3380 unsigned long event, void *ptr) 3381 { 3382 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3383 int err; 3384 3385 switch (event) { 3386 case SWITCHDEV_PORT_ATTR_SET: 3387 err = switchdev_handle_port_attr_set(dev, ptr, 3388 dsa_slave_dev_check, 3389 dsa_slave_port_attr_set); 3390 return notifier_from_errno(err); 3391 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3392 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3393 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3394 dsa_slave_dev_check, 3395 dsa_foreign_dev_check, 3396 dsa_slave_fdb_event); 3397 return notifier_from_errno(err); 3398 default: 3399 return NOTIFY_DONE; 3400 } 3401 3402 return NOTIFY_OK; 3403 } 3404 3405 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 3406 unsigned long event, void *ptr) 3407 { 3408 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3409 int err; 3410 3411 switch (event) { 3412 case SWITCHDEV_PORT_OBJ_ADD: 3413 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3414 dsa_slave_dev_check, 3415 dsa_foreign_dev_check, 3416 dsa_slave_port_obj_add); 3417 return notifier_from_errno(err); 3418 case SWITCHDEV_PORT_OBJ_DEL: 3419 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3420 dsa_slave_dev_check, 3421 dsa_foreign_dev_check, 3422 dsa_slave_port_obj_del); 3423 return notifier_from_errno(err); 3424 case SWITCHDEV_PORT_ATTR_SET: 3425 err = switchdev_handle_port_attr_set(dev, ptr, 3426 dsa_slave_dev_check, 3427 dsa_slave_port_attr_set); 3428 return notifier_from_errno(err); 3429 } 3430 3431 return NOTIFY_DONE; 3432 } 3433 3434 static struct notifier_block dsa_slave_nb __read_mostly = { 3435 .notifier_call = dsa_slave_netdevice_event, 3436 }; 3437 3438 struct notifier_block dsa_slave_switchdev_notifier = { 3439 .notifier_call = dsa_slave_switchdev_event, 3440 }; 3441 3442 struct notifier_block dsa_slave_switchdev_blocking_notifier = { 3443 .notifier_call = dsa_slave_switchdev_blocking_event, 3444 }; 3445 3446 int dsa_slave_register_notifier(void) 3447 { 3448 struct notifier_block *nb; 3449 int err; 3450 3451 err = register_netdevice_notifier(&dsa_slave_nb); 3452 if (err) 3453 return err; 3454 3455 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 3456 if (err) 3457 goto err_switchdev_nb; 3458 3459 nb = &dsa_slave_switchdev_blocking_notifier; 3460 err = register_switchdev_blocking_notifier(nb); 3461 if (err) 3462 goto err_switchdev_blocking_nb; 3463 3464 return 0; 3465 3466 err_switchdev_blocking_nb: 3467 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3468 err_switchdev_nb: 3469 unregister_netdevice_notifier(&dsa_slave_nb); 3470 return err; 3471 } 3472 3473 void dsa_slave_unregister_notifier(void) 3474 { 3475 struct notifier_block *nb; 3476 int err; 3477 3478 nb = &dsa_slave_switchdev_blocking_notifier; 3479 err = unregister_switchdev_blocking_notifier(nb); 3480 if (err) 3481 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3482 3483 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3484 if (err) 3485 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3486 3487 err = unregister_netdevice_notifier(&dsa_slave_nb); 3488 if (err) 3489 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 3490 } 3491