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 #include "port.h" 27 #include "master.h" 28 #include "slave.h" 29 #include "tag.h" 30 31 static void dsa_slave_standalone_event_work(struct work_struct *work) 32 { 33 struct dsa_standalone_event_work *standalone_work = 34 container_of(work, struct dsa_standalone_event_work, work); 35 const unsigned char *addr = standalone_work->addr; 36 struct net_device *dev = standalone_work->dev; 37 struct dsa_port *dp = dsa_slave_to_port(dev); 38 struct switchdev_obj_port_mdb mdb; 39 struct dsa_switch *ds = dp->ds; 40 u16 vid = standalone_work->vid; 41 int err; 42 43 switch (standalone_work->event) { 44 case DSA_UC_ADD: 45 err = dsa_port_standalone_host_fdb_add(dp, addr, vid); 46 if (err) { 47 dev_err(ds->dev, 48 "port %d failed to add %pM vid %d to fdb: %d\n", 49 dp->index, addr, vid, err); 50 break; 51 } 52 break; 53 54 case DSA_UC_DEL: 55 err = dsa_port_standalone_host_fdb_del(dp, addr, vid); 56 if (err) { 57 dev_err(ds->dev, 58 "port %d failed to delete %pM vid %d from fdb: %d\n", 59 dp->index, addr, vid, err); 60 } 61 62 break; 63 case DSA_MC_ADD: 64 ether_addr_copy(mdb.addr, addr); 65 mdb.vid = vid; 66 67 err = dsa_port_standalone_host_mdb_add(dp, &mdb); 68 if (err) { 69 dev_err(ds->dev, 70 "port %d failed to add %pM vid %d to mdb: %d\n", 71 dp->index, addr, vid, err); 72 break; 73 } 74 break; 75 case DSA_MC_DEL: 76 ether_addr_copy(mdb.addr, addr); 77 mdb.vid = vid; 78 79 err = dsa_port_standalone_host_mdb_del(dp, &mdb); 80 if (err) { 81 dev_err(ds->dev, 82 "port %d failed to delete %pM vid %d from mdb: %d\n", 83 dp->index, addr, vid, err); 84 } 85 86 break; 87 } 88 89 kfree(standalone_work); 90 } 91 92 static int dsa_slave_schedule_standalone_work(struct net_device *dev, 93 enum dsa_standalone_event event, 94 const unsigned char *addr, 95 u16 vid) 96 { 97 struct dsa_standalone_event_work *standalone_work; 98 99 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC); 100 if (!standalone_work) 101 return -ENOMEM; 102 103 INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work); 104 standalone_work->event = event; 105 standalone_work->dev = dev; 106 107 ether_addr_copy(standalone_work->addr, addr); 108 standalone_work->vid = vid; 109 110 dsa_schedule_work(&standalone_work->work); 111 112 return 0; 113 } 114 115 static int dsa_slave_sync_uc(struct net_device *dev, 116 const unsigned char *addr) 117 { 118 struct net_device *master = dsa_slave_to_master(dev); 119 struct dsa_port *dp = dsa_slave_to_port(dev); 120 121 dev_uc_add(master, addr); 122 123 if (!dsa_switch_supports_uc_filtering(dp->ds)) 124 return 0; 125 126 return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0); 127 } 128 129 static int dsa_slave_unsync_uc(struct net_device *dev, 130 const unsigned char *addr) 131 { 132 struct net_device *master = dsa_slave_to_master(dev); 133 struct dsa_port *dp = dsa_slave_to_port(dev); 134 135 dev_uc_del(master, addr); 136 137 if (!dsa_switch_supports_uc_filtering(dp->ds)) 138 return 0; 139 140 return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0); 141 } 142 143 static int dsa_slave_sync_mc(struct net_device *dev, 144 const unsigned char *addr) 145 { 146 struct net_device *master = dsa_slave_to_master(dev); 147 struct dsa_port *dp = dsa_slave_to_port(dev); 148 149 dev_mc_add(master, addr); 150 151 if (!dsa_switch_supports_mc_filtering(dp->ds)) 152 return 0; 153 154 return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0); 155 } 156 157 static int dsa_slave_unsync_mc(struct net_device *dev, 158 const unsigned char *addr) 159 { 160 struct net_device *master = dsa_slave_to_master(dev); 161 struct dsa_port *dp = dsa_slave_to_port(dev); 162 163 dev_mc_del(master, addr); 164 165 if (!dsa_switch_supports_mc_filtering(dp->ds)) 166 return 0; 167 168 return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0); 169 } 170 171 void dsa_slave_sync_ha(struct net_device *dev) 172 { 173 struct dsa_port *dp = dsa_slave_to_port(dev); 174 struct dsa_switch *ds = dp->ds; 175 struct netdev_hw_addr *ha; 176 177 netif_addr_lock_bh(dev); 178 179 netdev_for_each_synced_mc_addr(ha, dev) 180 dsa_slave_sync_mc(dev, ha->addr); 181 182 netdev_for_each_synced_uc_addr(ha, dev) 183 dsa_slave_sync_uc(dev, ha->addr); 184 185 netif_addr_unlock_bh(dev); 186 187 if (dsa_switch_supports_uc_filtering(ds) || 188 dsa_switch_supports_mc_filtering(ds)) 189 dsa_flush_workqueue(); 190 } 191 192 void dsa_slave_unsync_ha(struct net_device *dev) 193 { 194 struct dsa_port *dp = dsa_slave_to_port(dev); 195 struct dsa_switch *ds = dp->ds; 196 struct netdev_hw_addr *ha; 197 198 netif_addr_lock_bh(dev); 199 200 netdev_for_each_synced_uc_addr(ha, dev) 201 dsa_slave_unsync_uc(dev, ha->addr); 202 203 netdev_for_each_synced_mc_addr(ha, dev) 204 dsa_slave_unsync_mc(dev, ha->addr); 205 206 netif_addr_unlock_bh(dev); 207 208 if (dsa_switch_supports_uc_filtering(ds) || 209 dsa_switch_supports_mc_filtering(ds)) 210 dsa_flush_workqueue(); 211 } 212 213 /* slave mii_bus handling ***************************************************/ 214 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 215 { 216 struct dsa_switch *ds = bus->priv; 217 218 if (ds->phys_mii_mask & (1 << addr)) 219 return ds->ops->phy_read(ds, addr, reg); 220 221 return 0xffff; 222 } 223 224 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 225 { 226 struct dsa_switch *ds = bus->priv; 227 228 if (ds->phys_mii_mask & (1 << addr)) 229 return ds->ops->phy_write(ds, addr, reg, val); 230 231 return 0; 232 } 233 234 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 235 { 236 ds->slave_mii_bus->priv = (void *)ds; 237 ds->slave_mii_bus->name = "dsa slave smi"; 238 ds->slave_mii_bus->read = dsa_slave_phy_read; 239 ds->slave_mii_bus->write = dsa_slave_phy_write; 240 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 241 ds->dst->index, ds->index); 242 ds->slave_mii_bus->parent = ds->dev; 243 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 244 } 245 246 247 /* slave device handling ****************************************************/ 248 static int dsa_slave_get_iflink(const struct net_device *dev) 249 { 250 return dsa_slave_to_master(dev)->ifindex; 251 } 252 253 static int dsa_slave_open(struct net_device *dev) 254 { 255 struct net_device *master = dsa_slave_to_master(dev); 256 struct dsa_port *dp = dsa_slave_to_port(dev); 257 struct dsa_switch *ds = dp->ds; 258 int err; 259 260 err = dev_open(master, NULL); 261 if (err < 0) { 262 netdev_err(dev, "failed to open master %s\n", master->name); 263 goto out; 264 } 265 266 if (dsa_switch_supports_uc_filtering(ds)) { 267 err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0); 268 if (err) 269 goto out; 270 } 271 272 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 273 err = dev_uc_add(master, dev->dev_addr); 274 if (err < 0) 275 goto del_host_addr; 276 } 277 278 err = dsa_port_enable_rt(dp, dev->phydev); 279 if (err) 280 goto del_unicast; 281 282 return 0; 283 284 del_unicast: 285 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 286 dev_uc_del(master, dev->dev_addr); 287 del_host_addr: 288 if (dsa_switch_supports_uc_filtering(ds)) 289 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 290 out: 291 return err; 292 } 293 294 static int dsa_slave_close(struct net_device *dev) 295 { 296 struct net_device *master = dsa_slave_to_master(dev); 297 struct dsa_port *dp = dsa_slave_to_port(dev); 298 struct dsa_switch *ds = dp->ds; 299 300 dsa_port_disable_rt(dp); 301 302 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 303 dev_uc_del(master, dev->dev_addr); 304 305 if (dsa_switch_supports_uc_filtering(ds)) 306 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 307 308 return 0; 309 } 310 311 static void dsa_slave_manage_host_flood(struct net_device *dev) 312 { 313 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI); 314 struct dsa_port *dp = dsa_slave_to_port(dev); 315 bool uc = dev->flags & IFF_PROMISC; 316 317 dsa_port_set_host_flood(dp, uc, mc); 318 } 319 320 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 321 { 322 struct net_device *master = dsa_slave_to_master(dev); 323 struct dsa_port *dp = dsa_slave_to_port(dev); 324 struct dsa_switch *ds = dp->ds; 325 326 if (change & IFF_ALLMULTI) 327 dev_set_allmulti(master, 328 dev->flags & IFF_ALLMULTI ? 1 : -1); 329 if (change & IFF_PROMISC) 330 dev_set_promiscuity(master, 331 dev->flags & IFF_PROMISC ? 1 : -1); 332 333 if (dsa_switch_supports_uc_filtering(ds) && 334 dsa_switch_supports_mc_filtering(ds)) 335 dsa_slave_manage_host_flood(dev); 336 } 337 338 static void dsa_slave_set_rx_mode(struct net_device *dev) 339 { 340 __dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc); 341 __dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc); 342 } 343 344 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 345 { 346 struct net_device *master = dsa_slave_to_master(dev); 347 struct dsa_port *dp = dsa_slave_to_port(dev); 348 struct dsa_switch *ds = dp->ds; 349 struct sockaddr *addr = a; 350 int err; 351 352 if (!is_valid_ether_addr(addr->sa_data)) 353 return -EADDRNOTAVAIL; 354 355 /* If the port is down, the address isn't synced yet to hardware or 356 * to the DSA master, so there is nothing to change. 357 */ 358 if (!(dev->flags & IFF_UP)) 359 goto out_change_dev_addr; 360 361 if (dsa_switch_supports_uc_filtering(ds)) { 362 err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0); 363 if (err) 364 return err; 365 } 366 367 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 368 err = dev_uc_add(master, addr->sa_data); 369 if (err < 0) 370 goto del_unicast; 371 } 372 373 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 374 dev_uc_del(master, dev->dev_addr); 375 376 if (dsa_switch_supports_uc_filtering(ds)) 377 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 378 379 out_change_dev_addr: 380 eth_hw_addr_set(dev, addr->sa_data); 381 382 return 0; 383 384 del_unicast: 385 if (dsa_switch_supports_uc_filtering(ds)) 386 dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0); 387 388 return err; 389 } 390 391 struct dsa_slave_dump_ctx { 392 struct net_device *dev; 393 struct sk_buff *skb; 394 struct netlink_callback *cb; 395 int idx; 396 }; 397 398 static int 399 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 400 bool is_static, void *data) 401 { 402 struct dsa_slave_dump_ctx *dump = data; 403 u32 portid = NETLINK_CB(dump->cb->skb).portid; 404 u32 seq = dump->cb->nlh->nlmsg_seq; 405 struct nlmsghdr *nlh; 406 struct ndmsg *ndm; 407 408 if (dump->idx < dump->cb->args[2]) 409 goto skip; 410 411 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 412 sizeof(*ndm), NLM_F_MULTI); 413 if (!nlh) 414 return -EMSGSIZE; 415 416 ndm = nlmsg_data(nlh); 417 ndm->ndm_family = AF_BRIDGE; 418 ndm->ndm_pad1 = 0; 419 ndm->ndm_pad2 = 0; 420 ndm->ndm_flags = NTF_SELF; 421 ndm->ndm_type = 0; 422 ndm->ndm_ifindex = dump->dev->ifindex; 423 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 424 425 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 426 goto nla_put_failure; 427 428 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 429 goto nla_put_failure; 430 431 nlmsg_end(dump->skb, nlh); 432 433 skip: 434 dump->idx++; 435 return 0; 436 437 nla_put_failure: 438 nlmsg_cancel(dump->skb, nlh); 439 return -EMSGSIZE; 440 } 441 442 static int 443 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 444 struct net_device *dev, struct net_device *filter_dev, 445 int *idx) 446 { 447 struct dsa_port *dp = dsa_slave_to_port(dev); 448 struct dsa_slave_dump_ctx dump = { 449 .dev = dev, 450 .skb = skb, 451 .cb = cb, 452 .idx = *idx, 453 }; 454 int err; 455 456 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 457 *idx = dump.idx; 458 459 return err; 460 } 461 462 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 463 { 464 struct dsa_slave_priv *p = netdev_priv(dev); 465 struct dsa_switch *ds = p->dp->ds; 466 int port = p->dp->index; 467 468 /* Pass through to switch driver if it supports timestamping */ 469 switch (cmd) { 470 case SIOCGHWTSTAMP: 471 if (ds->ops->port_hwtstamp_get) 472 return ds->ops->port_hwtstamp_get(ds, port, ifr); 473 break; 474 case SIOCSHWTSTAMP: 475 if (ds->ops->port_hwtstamp_set) 476 return ds->ops->port_hwtstamp_set(ds, port, ifr); 477 break; 478 } 479 480 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 481 } 482 483 static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx, 484 const struct switchdev_attr *attr, 485 struct netlink_ext_ack *extack) 486 { 487 struct dsa_port *dp = dsa_slave_to_port(dev); 488 int ret; 489 490 if (ctx && ctx != dp) 491 return 0; 492 493 switch (attr->id) { 494 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 495 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 496 return -EOPNOTSUPP; 497 498 ret = dsa_port_set_state(dp, attr->u.stp_state, true); 499 break; 500 case SWITCHDEV_ATTR_ID_PORT_MST_STATE: 501 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 502 return -EOPNOTSUPP; 503 504 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack); 505 break; 506 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 507 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 508 return -EOPNOTSUPP; 509 510 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 511 extack); 512 break; 513 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 514 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 515 return -EOPNOTSUPP; 516 517 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 518 break; 519 case SWITCHDEV_ATTR_ID_BRIDGE_MST: 520 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 521 return -EOPNOTSUPP; 522 523 ret = dsa_port_mst_enable(dp, attr->u.mst, extack); 524 break; 525 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 526 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 527 return -EOPNOTSUPP; 528 529 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 530 extack); 531 break; 532 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 533 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 534 return -EOPNOTSUPP; 535 536 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 537 break; 538 case SWITCHDEV_ATTR_ID_VLAN_MSTI: 539 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 540 return -EOPNOTSUPP; 541 542 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti); 543 break; 544 default: 545 ret = -EOPNOTSUPP; 546 break; 547 } 548 549 return ret; 550 } 551 552 /* Must be called under rcu_read_lock() */ 553 static int 554 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave, 555 const struct switchdev_obj_port_vlan *vlan) 556 { 557 struct net_device *upper_dev; 558 struct list_head *iter; 559 560 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 561 u16 vid; 562 563 if (!is_vlan_dev(upper_dev)) 564 continue; 565 566 vid = vlan_dev_vlan_id(upper_dev); 567 if (vid == vlan->vid) 568 return -EBUSY; 569 } 570 571 return 0; 572 } 573 574 static int dsa_slave_vlan_add(struct net_device *dev, 575 const struct switchdev_obj *obj, 576 struct netlink_ext_ack *extack) 577 { 578 struct dsa_port *dp = dsa_slave_to_port(dev); 579 struct switchdev_obj_port_vlan *vlan; 580 int err; 581 582 if (dsa_port_skip_vlan_configuration(dp)) { 583 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 584 return 0; 585 } 586 587 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 588 589 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 590 * the same VID. 591 */ 592 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { 593 rcu_read_lock(); 594 err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan); 595 rcu_read_unlock(); 596 if (err) { 597 NL_SET_ERR_MSG_MOD(extack, 598 "Port already has a VLAN upper with this VID"); 599 return err; 600 } 601 } 602 603 return dsa_port_vlan_add(dp, vlan, extack); 604 } 605 606 /* Offload a VLAN installed on the bridge or on a foreign interface by 607 * installing it as a VLAN towards the CPU port. 608 */ 609 static int dsa_slave_host_vlan_add(struct net_device *dev, 610 const struct switchdev_obj *obj, 611 struct netlink_ext_ack *extack) 612 { 613 struct dsa_port *dp = dsa_slave_to_port(dev); 614 struct switchdev_obj_port_vlan vlan; 615 616 /* Do nothing if this is a software bridge */ 617 if (!dp->bridge) 618 return -EOPNOTSUPP; 619 620 if (dsa_port_skip_vlan_configuration(dp)) { 621 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 622 return 0; 623 } 624 625 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 626 627 /* Even though drivers often handle CPU membership in special ways, 628 * it doesn't make sense to program a PVID, so clear this flag. 629 */ 630 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 631 632 return dsa_port_host_vlan_add(dp, &vlan, extack); 633 } 634 635 static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, 636 const struct switchdev_obj *obj, 637 struct netlink_ext_ack *extack) 638 { 639 struct dsa_port *dp = dsa_slave_to_port(dev); 640 int err; 641 642 if (ctx && ctx != dp) 643 return 0; 644 645 switch (obj->id) { 646 case SWITCHDEV_OBJ_ID_PORT_MDB: 647 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 648 return -EOPNOTSUPP; 649 650 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 651 break; 652 case SWITCHDEV_OBJ_ID_HOST_MDB: 653 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 654 return -EOPNOTSUPP; 655 656 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 657 break; 658 case SWITCHDEV_OBJ_ID_PORT_VLAN: 659 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 660 err = dsa_slave_vlan_add(dev, obj, extack); 661 else 662 err = dsa_slave_host_vlan_add(dev, obj, extack); 663 break; 664 case SWITCHDEV_OBJ_ID_MRP: 665 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 666 return -EOPNOTSUPP; 667 668 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 669 break; 670 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 671 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 672 return -EOPNOTSUPP; 673 674 err = dsa_port_mrp_add_ring_role(dp, 675 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 676 break; 677 default: 678 err = -EOPNOTSUPP; 679 break; 680 } 681 682 return err; 683 } 684 685 static int dsa_slave_vlan_del(struct net_device *dev, 686 const struct switchdev_obj *obj) 687 { 688 struct dsa_port *dp = dsa_slave_to_port(dev); 689 struct switchdev_obj_port_vlan *vlan; 690 691 if (dsa_port_skip_vlan_configuration(dp)) 692 return 0; 693 694 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 695 696 return dsa_port_vlan_del(dp, vlan); 697 } 698 699 static int dsa_slave_host_vlan_del(struct net_device *dev, 700 const struct switchdev_obj *obj) 701 { 702 struct dsa_port *dp = dsa_slave_to_port(dev); 703 struct switchdev_obj_port_vlan *vlan; 704 705 /* Do nothing if this is a software bridge */ 706 if (!dp->bridge) 707 return -EOPNOTSUPP; 708 709 if (dsa_port_skip_vlan_configuration(dp)) 710 return 0; 711 712 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 713 714 return dsa_port_host_vlan_del(dp, vlan); 715 } 716 717 static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx, 718 const struct switchdev_obj *obj) 719 { 720 struct dsa_port *dp = dsa_slave_to_port(dev); 721 int err; 722 723 if (ctx && ctx != dp) 724 return 0; 725 726 switch (obj->id) { 727 case SWITCHDEV_OBJ_ID_PORT_MDB: 728 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 729 return -EOPNOTSUPP; 730 731 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 732 break; 733 case SWITCHDEV_OBJ_ID_HOST_MDB: 734 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 735 return -EOPNOTSUPP; 736 737 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 738 break; 739 case SWITCHDEV_OBJ_ID_PORT_VLAN: 740 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 741 err = dsa_slave_vlan_del(dev, obj); 742 else 743 err = dsa_slave_host_vlan_del(dev, obj); 744 break; 745 case SWITCHDEV_OBJ_ID_MRP: 746 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 747 return -EOPNOTSUPP; 748 749 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 750 break; 751 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 752 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 753 return -EOPNOTSUPP; 754 755 err = dsa_port_mrp_del_ring_role(dp, 756 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 757 break; 758 default: 759 err = -EOPNOTSUPP; 760 break; 761 } 762 763 return err; 764 } 765 766 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 767 struct sk_buff *skb) 768 { 769 #ifdef CONFIG_NET_POLL_CONTROLLER 770 struct dsa_slave_priv *p = netdev_priv(dev); 771 772 return netpoll_send_skb(p->netpoll, skb); 773 #else 774 BUG(); 775 return NETDEV_TX_OK; 776 #endif 777 } 778 779 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 780 struct sk_buff *skb) 781 { 782 struct dsa_switch *ds = p->dp->ds; 783 784 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 785 return; 786 787 if (!ds->ops->port_txtstamp) 788 return; 789 790 ds->ops->port_txtstamp(ds, p->dp->index, skb); 791 } 792 793 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 794 { 795 /* SKB for netpoll still need to be mangled with the protocol-specific 796 * tag to be successfully transmitted 797 */ 798 if (unlikely(netpoll_tx_running(dev))) 799 return dsa_slave_netpoll_send_skb(dev, skb); 800 801 /* Queue the SKB for transmission on the parent interface, but 802 * do not modify its EtherType 803 */ 804 skb->dev = dsa_slave_to_master(dev); 805 dev_queue_xmit(skb); 806 807 return NETDEV_TX_OK; 808 } 809 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 810 811 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) 812 { 813 int needed_headroom = dev->needed_headroom; 814 int needed_tailroom = dev->needed_tailroom; 815 816 /* For tail taggers, we need to pad short frames ourselves, to ensure 817 * that the tail tag does not fail at its role of being at the end of 818 * the packet, once the master interface pads the frame. Account for 819 * that pad length here, and pad later. 820 */ 821 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) 822 needed_tailroom += ETH_ZLEN - skb->len; 823 /* skb_headroom() returns unsigned int... */ 824 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); 825 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); 826 827 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) 828 /* No reallocation needed, yay! */ 829 return 0; 830 831 return pskb_expand_head(skb, needed_headroom, needed_tailroom, 832 GFP_ATOMIC); 833 } 834 835 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 836 { 837 struct dsa_slave_priv *p = netdev_priv(dev); 838 struct sk_buff *nskb; 839 840 dev_sw_netstats_tx_add(dev, 1, skb->len); 841 842 memset(skb->cb, 0, sizeof(skb->cb)); 843 844 /* Handle tx timestamp if any */ 845 dsa_skb_tx_timestamp(p, skb); 846 847 if (dsa_realloc_skb(skb, dev)) { 848 dev_kfree_skb_any(skb); 849 return NETDEV_TX_OK; 850 } 851 852 /* needed_tailroom should still be 'warm' in the cache line from 853 * dsa_realloc_skb(), which has also ensured that padding is safe. 854 */ 855 if (dev->needed_tailroom) 856 eth_skb_pad(skb); 857 858 /* Transmit function may have to reallocate the original SKB, 859 * in which case it must have freed it. Only free it here on error. 860 */ 861 nskb = p->xmit(skb, dev); 862 if (!nskb) { 863 kfree_skb(skb); 864 return NETDEV_TX_OK; 865 } 866 867 return dsa_enqueue_skb(nskb, dev); 868 } 869 870 /* ethtool operations *******************************************************/ 871 872 static void dsa_slave_get_drvinfo(struct net_device *dev, 873 struct ethtool_drvinfo *drvinfo) 874 { 875 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 876 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 877 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 878 } 879 880 static int dsa_slave_get_regs_len(struct net_device *dev) 881 { 882 struct dsa_port *dp = dsa_slave_to_port(dev); 883 struct dsa_switch *ds = dp->ds; 884 885 if (ds->ops->get_regs_len) 886 return ds->ops->get_regs_len(ds, dp->index); 887 888 return -EOPNOTSUPP; 889 } 890 891 static void 892 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 893 { 894 struct dsa_port *dp = dsa_slave_to_port(dev); 895 struct dsa_switch *ds = dp->ds; 896 897 if (ds->ops->get_regs) 898 ds->ops->get_regs(ds, dp->index, regs, _p); 899 } 900 901 static int dsa_slave_nway_reset(struct net_device *dev) 902 { 903 struct dsa_port *dp = dsa_slave_to_port(dev); 904 905 return phylink_ethtool_nway_reset(dp->pl); 906 } 907 908 static int dsa_slave_get_eeprom_len(struct net_device *dev) 909 { 910 struct dsa_port *dp = dsa_slave_to_port(dev); 911 struct dsa_switch *ds = dp->ds; 912 913 if (ds->cd && ds->cd->eeprom_len) 914 return ds->cd->eeprom_len; 915 916 if (ds->ops->get_eeprom_len) 917 return ds->ops->get_eeprom_len(ds); 918 919 return 0; 920 } 921 922 static int dsa_slave_get_eeprom(struct net_device *dev, 923 struct ethtool_eeprom *eeprom, u8 *data) 924 { 925 struct dsa_port *dp = dsa_slave_to_port(dev); 926 struct dsa_switch *ds = dp->ds; 927 928 if (ds->ops->get_eeprom) 929 return ds->ops->get_eeprom(ds, eeprom, data); 930 931 return -EOPNOTSUPP; 932 } 933 934 static int dsa_slave_set_eeprom(struct net_device *dev, 935 struct ethtool_eeprom *eeprom, u8 *data) 936 { 937 struct dsa_port *dp = dsa_slave_to_port(dev); 938 struct dsa_switch *ds = dp->ds; 939 940 if (ds->ops->set_eeprom) 941 return ds->ops->set_eeprom(ds, eeprom, data); 942 943 return -EOPNOTSUPP; 944 } 945 946 static void dsa_slave_get_strings(struct net_device *dev, 947 uint32_t stringset, uint8_t *data) 948 { 949 struct dsa_port *dp = dsa_slave_to_port(dev); 950 struct dsa_switch *ds = dp->ds; 951 952 if (stringset == ETH_SS_STATS) { 953 int len = ETH_GSTRING_LEN; 954 955 strncpy(data, "tx_packets", len); 956 strncpy(data + len, "tx_bytes", len); 957 strncpy(data + 2 * len, "rx_packets", len); 958 strncpy(data + 3 * len, "rx_bytes", len); 959 if (ds->ops->get_strings) 960 ds->ops->get_strings(ds, dp->index, stringset, 961 data + 4 * len); 962 } else if (stringset == ETH_SS_TEST) { 963 net_selftest_get_strings(data); 964 } 965 966 } 967 968 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 969 struct ethtool_stats *stats, 970 uint64_t *data) 971 { 972 struct dsa_port *dp = dsa_slave_to_port(dev); 973 struct dsa_switch *ds = dp->ds; 974 struct pcpu_sw_netstats *s; 975 unsigned int start; 976 int i; 977 978 for_each_possible_cpu(i) { 979 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 980 981 s = per_cpu_ptr(dev->tstats, i); 982 do { 983 start = u64_stats_fetch_begin(&s->syncp); 984 tx_packets = u64_stats_read(&s->tx_packets); 985 tx_bytes = u64_stats_read(&s->tx_bytes); 986 rx_packets = u64_stats_read(&s->rx_packets); 987 rx_bytes = u64_stats_read(&s->rx_bytes); 988 } while (u64_stats_fetch_retry(&s->syncp, start)); 989 data[0] += tx_packets; 990 data[1] += tx_bytes; 991 data[2] += rx_packets; 992 data[3] += rx_bytes; 993 } 994 if (ds->ops->get_ethtool_stats) 995 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 996 } 997 998 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 999 { 1000 struct dsa_port *dp = dsa_slave_to_port(dev); 1001 struct dsa_switch *ds = dp->ds; 1002 1003 if (sset == ETH_SS_STATS) { 1004 int count = 0; 1005 1006 if (ds->ops->get_sset_count) { 1007 count = ds->ops->get_sset_count(ds, dp->index, sset); 1008 if (count < 0) 1009 return count; 1010 } 1011 1012 return count + 4; 1013 } else if (sset == ETH_SS_TEST) { 1014 return net_selftest_get_count(); 1015 } 1016 1017 return -EOPNOTSUPP; 1018 } 1019 1020 static void dsa_slave_get_eth_phy_stats(struct net_device *dev, 1021 struct ethtool_eth_phy_stats *phy_stats) 1022 { 1023 struct dsa_port *dp = dsa_slave_to_port(dev); 1024 struct dsa_switch *ds = dp->ds; 1025 1026 if (ds->ops->get_eth_phy_stats) 1027 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats); 1028 } 1029 1030 static void dsa_slave_get_eth_mac_stats(struct net_device *dev, 1031 struct ethtool_eth_mac_stats *mac_stats) 1032 { 1033 struct dsa_port *dp = dsa_slave_to_port(dev); 1034 struct dsa_switch *ds = dp->ds; 1035 1036 if (ds->ops->get_eth_mac_stats) 1037 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats); 1038 } 1039 1040 static void 1041 dsa_slave_get_eth_ctrl_stats(struct net_device *dev, 1042 struct ethtool_eth_ctrl_stats *ctrl_stats) 1043 { 1044 struct dsa_port *dp = dsa_slave_to_port(dev); 1045 struct dsa_switch *ds = dp->ds; 1046 1047 if (ds->ops->get_eth_ctrl_stats) 1048 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats); 1049 } 1050 1051 static void 1052 dsa_slave_get_rmon_stats(struct net_device *dev, 1053 struct ethtool_rmon_stats *rmon_stats, 1054 const struct ethtool_rmon_hist_range **ranges) 1055 { 1056 struct dsa_port *dp = dsa_slave_to_port(dev); 1057 struct dsa_switch *ds = dp->ds; 1058 1059 if (ds->ops->get_rmon_stats) 1060 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges); 1061 } 1062 1063 static void dsa_slave_net_selftest(struct net_device *ndev, 1064 struct ethtool_test *etest, u64 *buf) 1065 { 1066 struct dsa_port *dp = dsa_slave_to_port(ndev); 1067 struct dsa_switch *ds = dp->ds; 1068 1069 if (ds->ops->self_test) { 1070 ds->ops->self_test(ds, dp->index, etest, buf); 1071 return; 1072 } 1073 1074 net_selftest(ndev, etest, buf); 1075 } 1076 1077 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1078 { 1079 struct dsa_port *dp = dsa_slave_to_port(dev); 1080 struct dsa_switch *ds = dp->ds; 1081 1082 phylink_ethtool_get_wol(dp->pl, w); 1083 1084 if (ds->ops->get_wol) 1085 ds->ops->get_wol(ds, dp->index, w); 1086 } 1087 1088 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1089 { 1090 struct dsa_port *dp = dsa_slave_to_port(dev); 1091 struct dsa_switch *ds = dp->ds; 1092 int ret = -EOPNOTSUPP; 1093 1094 phylink_ethtool_set_wol(dp->pl, w); 1095 1096 if (ds->ops->set_wol) 1097 ret = ds->ops->set_wol(ds, dp->index, w); 1098 1099 return ret; 1100 } 1101 1102 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 1103 { 1104 struct dsa_port *dp = dsa_slave_to_port(dev); 1105 struct dsa_switch *ds = dp->ds; 1106 int ret; 1107 1108 /* Port's PHY and MAC both need to be EEE capable */ 1109 if (!dev->phydev || !dp->pl) 1110 return -ENODEV; 1111 1112 if (!ds->ops->set_mac_eee) 1113 return -EOPNOTSUPP; 1114 1115 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1116 if (ret) 1117 return ret; 1118 1119 return phylink_ethtool_set_eee(dp->pl, e); 1120 } 1121 1122 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 1123 { 1124 struct dsa_port *dp = dsa_slave_to_port(dev); 1125 struct dsa_switch *ds = dp->ds; 1126 int ret; 1127 1128 /* Port's PHY and MAC both need to be EEE capable */ 1129 if (!dev->phydev || !dp->pl) 1130 return -ENODEV; 1131 1132 if (!ds->ops->get_mac_eee) 1133 return -EOPNOTSUPP; 1134 1135 ret = ds->ops->get_mac_eee(ds, dp->index, e); 1136 if (ret) 1137 return ret; 1138 1139 return phylink_ethtool_get_eee(dp->pl, e); 1140 } 1141 1142 static int dsa_slave_get_link_ksettings(struct net_device *dev, 1143 struct ethtool_link_ksettings *cmd) 1144 { 1145 struct dsa_port *dp = dsa_slave_to_port(dev); 1146 1147 return phylink_ethtool_ksettings_get(dp->pl, cmd); 1148 } 1149 1150 static int dsa_slave_set_link_ksettings(struct net_device *dev, 1151 const struct ethtool_link_ksettings *cmd) 1152 { 1153 struct dsa_port *dp = dsa_slave_to_port(dev); 1154 1155 return phylink_ethtool_ksettings_set(dp->pl, cmd); 1156 } 1157 1158 static void dsa_slave_get_pause_stats(struct net_device *dev, 1159 struct ethtool_pause_stats *pause_stats) 1160 { 1161 struct dsa_port *dp = dsa_slave_to_port(dev); 1162 struct dsa_switch *ds = dp->ds; 1163 1164 if (ds->ops->get_pause_stats) 1165 ds->ops->get_pause_stats(ds, dp->index, pause_stats); 1166 } 1167 1168 static void dsa_slave_get_pauseparam(struct net_device *dev, 1169 struct ethtool_pauseparam *pause) 1170 { 1171 struct dsa_port *dp = dsa_slave_to_port(dev); 1172 1173 phylink_ethtool_get_pauseparam(dp->pl, pause); 1174 } 1175 1176 static int dsa_slave_set_pauseparam(struct net_device *dev, 1177 struct ethtool_pauseparam *pause) 1178 { 1179 struct dsa_port *dp = dsa_slave_to_port(dev); 1180 1181 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1182 } 1183 1184 #ifdef CONFIG_NET_POLL_CONTROLLER 1185 static int dsa_slave_netpoll_setup(struct net_device *dev, 1186 struct netpoll_info *ni) 1187 { 1188 struct net_device *master = dsa_slave_to_master(dev); 1189 struct dsa_slave_priv *p = netdev_priv(dev); 1190 struct netpoll *netpoll; 1191 int err = 0; 1192 1193 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1194 if (!netpoll) 1195 return -ENOMEM; 1196 1197 err = __netpoll_setup(netpoll, master); 1198 if (err) { 1199 kfree(netpoll); 1200 goto out; 1201 } 1202 1203 p->netpoll = netpoll; 1204 out: 1205 return err; 1206 } 1207 1208 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 1209 { 1210 struct dsa_slave_priv *p = netdev_priv(dev); 1211 struct netpoll *netpoll = p->netpoll; 1212 1213 if (!netpoll) 1214 return; 1215 1216 p->netpoll = NULL; 1217 1218 __netpoll_free(netpoll); 1219 } 1220 1221 static void dsa_slave_poll_controller(struct net_device *dev) 1222 { 1223 } 1224 #endif 1225 1226 static struct dsa_mall_tc_entry * 1227 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1228 { 1229 struct dsa_slave_priv *p = netdev_priv(dev); 1230 struct dsa_mall_tc_entry *mall_tc_entry; 1231 1232 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1233 if (mall_tc_entry->cookie == cookie) 1234 return mall_tc_entry; 1235 1236 return NULL; 1237 } 1238 1239 static int 1240 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 1241 struct tc_cls_matchall_offload *cls, 1242 bool ingress) 1243 { 1244 struct netlink_ext_ack *extack = cls->common.extack; 1245 struct dsa_port *dp = dsa_slave_to_port(dev); 1246 struct dsa_slave_priv *p = netdev_priv(dev); 1247 struct dsa_mall_mirror_tc_entry *mirror; 1248 struct dsa_mall_tc_entry *mall_tc_entry; 1249 struct dsa_switch *ds = dp->ds; 1250 struct flow_action_entry *act; 1251 struct dsa_port *to_dp; 1252 int err; 1253 1254 if (!ds->ops->port_mirror_add) 1255 return -EOPNOTSUPP; 1256 1257 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1258 cls->common.extack)) 1259 return -EOPNOTSUPP; 1260 1261 act = &cls->rule->action.entries[0]; 1262 1263 if (!act->dev) 1264 return -EINVAL; 1265 1266 if (!dsa_slave_dev_check(act->dev)) 1267 return -EOPNOTSUPP; 1268 1269 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1270 if (!mall_tc_entry) 1271 return -ENOMEM; 1272 1273 mall_tc_entry->cookie = cls->cookie; 1274 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1275 mirror = &mall_tc_entry->mirror; 1276 1277 to_dp = dsa_slave_to_port(act->dev); 1278 1279 mirror->to_local_port = to_dp->index; 1280 mirror->ingress = ingress; 1281 1282 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1283 if (err) { 1284 kfree(mall_tc_entry); 1285 return err; 1286 } 1287 1288 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1289 1290 return err; 1291 } 1292 1293 static int 1294 dsa_slave_add_cls_matchall_police(struct net_device *dev, 1295 struct tc_cls_matchall_offload *cls, 1296 bool ingress) 1297 { 1298 struct netlink_ext_ack *extack = cls->common.extack; 1299 struct dsa_port *dp = dsa_slave_to_port(dev); 1300 struct dsa_slave_priv *p = netdev_priv(dev); 1301 struct dsa_mall_policer_tc_entry *policer; 1302 struct dsa_mall_tc_entry *mall_tc_entry; 1303 struct dsa_switch *ds = dp->ds; 1304 struct flow_action_entry *act; 1305 int err; 1306 1307 if (!ds->ops->port_policer_add) { 1308 NL_SET_ERR_MSG_MOD(extack, 1309 "Policing offload not implemented"); 1310 return -EOPNOTSUPP; 1311 } 1312 1313 if (!ingress) { 1314 NL_SET_ERR_MSG_MOD(extack, 1315 "Only supported on ingress qdisc"); 1316 return -EOPNOTSUPP; 1317 } 1318 1319 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1320 cls->common.extack)) 1321 return -EOPNOTSUPP; 1322 1323 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1324 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1325 NL_SET_ERR_MSG_MOD(extack, 1326 "Only one port policer allowed"); 1327 return -EEXIST; 1328 } 1329 } 1330 1331 act = &cls->rule->action.entries[0]; 1332 1333 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1334 if (!mall_tc_entry) 1335 return -ENOMEM; 1336 1337 mall_tc_entry->cookie = cls->cookie; 1338 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1339 policer = &mall_tc_entry->policer; 1340 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1341 policer->burst = act->police.burst; 1342 1343 err = ds->ops->port_policer_add(ds, dp->index, policer); 1344 if (err) { 1345 kfree(mall_tc_entry); 1346 return err; 1347 } 1348 1349 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1350 1351 return err; 1352 } 1353 1354 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1355 struct tc_cls_matchall_offload *cls, 1356 bool ingress) 1357 { 1358 int err = -EOPNOTSUPP; 1359 1360 if (cls->common.protocol == htons(ETH_P_ALL) && 1361 flow_offload_has_one_action(&cls->rule->action) && 1362 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1363 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1364 else if (flow_offload_has_one_action(&cls->rule->action) && 1365 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1366 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1367 1368 return err; 1369 } 1370 1371 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1372 struct tc_cls_matchall_offload *cls) 1373 { 1374 struct dsa_port *dp = dsa_slave_to_port(dev); 1375 struct dsa_mall_tc_entry *mall_tc_entry; 1376 struct dsa_switch *ds = dp->ds; 1377 1378 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1379 if (!mall_tc_entry) 1380 return; 1381 1382 list_del(&mall_tc_entry->list); 1383 1384 switch (mall_tc_entry->type) { 1385 case DSA_PORT_MALL_MIRROR: 1386 if (ds->ops->port_mirror_del) 1387 ds->ops->port_mirror_del(ds, dp->index, 1388 &mall_tc_entry->mirror); 1389 break; 1390 case DSA_PORT_MALL_POLICER: 1391 if (ds->ops->port_policer_del) 1392 ds->ops->port_policer_del(ds, dp->index); 1393 break; 1394 default: 1395 WARN_ON(1); 1396 } 1397 1398 kfree(mall_tc_entry); 1399 } 1400 1401 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1402 struct tc_cls_matchall_offload *cls, 1403 bool ingress) 1404 { 1405 if (cls->common.chain_index) 1406 return -EOPNOTSUPP; 1407 1408 switch (cls->command) { 1409 case TC_CLSMATCHALL_REPLACE: 1410 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1411 case TC_CLSMATCHALL_DESTROY: 1412 dsa_slave_del_cls_matchall(dev, cls); 1413 return 0; 1414 default: 1415 return -EOPNOTSUPP; 1416 } 1417 } 1418 1419 static int dsa_slave_add_cls_flower(struct net_device *dev, 1420 struct flow_cls_offload *cls, 1421 bool ingress) 1422 { 1423 struct dsa_port *dp = dsa_slave_to_port(dev); 1424 struct dsa_switch *ds = dp->ds; 1425 int port = dp->index; 1426 1427 if (!ds->ops->cls_flower_add) 1428 return -EOPNOTSUPP; 1429 1430 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1431 } 1432 1433 static int dsa_slave_del_cls_flower(struct net_device *dev, 1434 struct flow_cls_offload *cls, 1435 bool ingress) 1436 { 1437 struct dsa_port *dp = dsa_slave_to_port(dev); 1438 struct dsa_switch *ds = dp->ds; 1439 int port = dp->index; 1440 1441 if (!ds->ops->cls_flower_del) 1442 return -EOPNOTSUPP; 1443 1444 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1445 } 1446 1447 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1448 struct flow_cls_offload *cls, 1449 bool ingress) 1450 { 1451 struct dsa_port *dp = dsa_slave_to_port(dev); 1452 struct dsa_switch *ds = dp->ds; 1453 int port = dp->index; 1454 1455 if (!ds->ops->cls_flower_stats) 1456 return -EOPNOTSUPP; 1457 1458 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1459 } 1460 1461 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1462 struct flow_cls_offload *cls, 1463 bool ingress) 1464 { 1465 switch (cls->command) { 1466 case FLOW_CLS_REPLACE: 1467 return dsa_slave_add_cls_flower(dev, cls, ingress); 1468 case FLOW_CLS_DESTROY: 1469 return dsa_slave_del_cls_flower(dev, cls, ingress); 1470 case FLOW_CLS_STATS: 1471 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1472 default: 1473 return -EOPNOTSUPP; 1474 } 1475 } 1476 1477 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1478 void *cb_priv, bool ingress) 1479 { 1480 struct net_device *dev = cb_priv; 1481 1482 if (!tc_can_offload(dev)) 1483 return -EOPNOTSUPP; 1484 1485 switch (type) { 1486 case TC_SETUP_CLSMATCHALL: 1487 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1488 case TC_SETUP_CLSFLOWER: 1489 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1490 default: 1491 return -EOPNOTSUPP; 1492 } 1493 } 1494 1495 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1496 void *type_data, void *cb_priv) 1497 { 1498 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1499 } 1500 1501 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1502 void *type_data, void *cb_priv) 1503 { 1504 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1505 } 1506 1507 static LIST_HEAD(dsa_slave_block_cb_list); 1508 1509 static int dsa_slave_setup_tc_block(struct net_device *dev, 1510 struct flow_block_offload *f) 1511 { 1512 struct flow_block_cb *block_cb; 1513 flow_setup_cb_t *cb; 1514 1515 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1516 cb = dsa_slave_setup_tc_block_cb_ig; 1517 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1518 cb = dsa_slave_setup_tc_block_cb_eg; 1519 else 1520 return -EOPNOTSUPP; 1521 1522 f->driver_block_list = &dsa_slave_block_cb_list; 1523 1524 switch (f->command) { 1525 case FLOW_BLOCK_BIND: 1526 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1527 return -EBUSY; 1528 1529 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1530 if (IS_ERR(block_cb)) 1531 return PTR_ERR(block_cb); 1532 1533 flow_block_cb_add(block_cb, f); 1534 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1535 return 0; 1536 case FLOW_BLOCK_UNBIND: 1537 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1538 if (!block_cb) 1539 return -ENOENT; 1540 1541 flow_block_cb_remove(block_cb, f); 1542 list_del(&block_cb->driver_list); 1543 return 0; 1544 default: 1545 return -EOPNOTSUPP; 1546 } 1547 } 1548 1549 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port, 1550 void *type_data) 1551 { 1552 struct net_device *master = dsa_port_to_master(dsa_to_port(ds, port)); 1553 1554 if (!master->netdev_ops->ndo_setup_tc) 1555 return -EOPNOTSUPP; 1556 1557 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data); 1558 } 1559 1560 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1561 void *type_data) 1562 { 1563 struct dsa_port *dp = dsa_slave_to_port(dev); 1564 struct dsa_switch *ds = dp->ds; 1565 1566 switch (type) { 1567 case TC_SETUP_BLOCK: 1568 return dsa_slave_setup_tc_block(dev, type_data); 1569 case TC_SETUP_FT: 1570 return dsa_slave_setup_ft_block(ds, dp->index, type_data); 1571 default: 1572 break; 1573 } 1574 1575 if (!ds->ops->port_setup_tc) 1576 return -EOPNOTSUPP; 1577 1578 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1579 } 1580 1581 static int dsa_slave_get_rxnfc(struct net_device *dev, 1582 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1583 { 1584 struct dsa_port *dp = dsa_slave_to_port(dev); 1585 struct dsa_switch *ds = dp->ds; 1586 1587 if (!ds->ops->get_rxnfc) 1588 return -EOPNOTSUPP; 1589 1590 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1591 } 1592 1593 static int dsa_slave_set_rxnfc(struct net_device *dev, 1594 struct ethtool_rxnfc *nfc) 1595 { 1596 struct dsa_port *dp = dsa_slave_to_port(dev); 1597 struct dsa_switch *ds = dp->ds; 1598 1599 if (!ds->ops->set_rxnfc) 1600 return -EOPNOTSUPP; 1601 1602 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1603 } 1604 1605 static int dsa_slave_get_ts_info(struct net_device *dev, 1606 struct ethtool_ts_info *ts) 1607 { 1608 struct dsa_slave_priv *p = netdev_priv(dev); 1609 struct dsa_switch *ds = p->dp->ds; 1610 1611 if (!ds->ops->get_ts_info) 1612 return -EOPNOTSUPP; 1613 1614 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1615 } 1616 1617 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1618 u16 vid) 1619 { 1620 struct dsa_port *dp = dsa_slave_to_port(dev); 1621 struct switchdev_obj_port_vlan vlan = { 1622 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1623 .vid = vid, 1624 /* This API only allows programming tagged, non-PVID VIDs */ 1625 .flags = 0, 1626 }; 1627 struct netlink_ext_ack extack = {0}; 1628 int ret; 1629 1630 /* User port... */ 1631 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1632 if (ret) { 1633 if (extack._msg) 1634 netdev_err(dev, "%s\n", extack._msg); 1635 return ret; 1636 } 1637 1638 /* And CPU port... */ 1639 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1640 if (ret) { 1641 if (extack._msg) 1642 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1643 extack._msg); 1644 return ret; 1645 } 1646 1647 return 0; 1648 } 1649 1650 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1651 u16 vid) 1652 { 1653 struct dsa_port *dp = dsa_slave_to_port(dev); 1654 struct switchdev_obj_port_vlan vlan = { 1655 .vid = vid, 1656 /* This API only allows programming tagged, non-PVID VIDs */ 1657 .flags = 0, 1658 }; 1659 int err; 1660 1661 err = dsa_port_vlan_del(dp, &vlan); 1662 if (err) 1663 return err; 1664 1665 return dsa_port_host_vlan_del(dp, &vlan); 1666 } 1667 1668 static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg) 1669 { 1670 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1671 1672 return dsa_slave_vlan_rx_add_vid(arg, proto, vid); 1673 } 1674 1675 static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg) 1676 { 1677 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1678 1679 return dsa_slave_vlan_rx_kill_vid(arg, proto, vid); 1680 } 1681 1682 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1683 * filtering is enabled. The baseline is that only ports that offload a 1684 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1685 * but there are exceptions for quirky hardware. 1686 * 1687 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1688 * the same switch with other ports that offload a VLAN-aware bridge are also 1689 * inevitably VLAN-aware. 1690 * 1691 * To summarize, a DSA switch port offloads: 1692 * 1693 * - If standalone (this includes software bridge, software LAG): 1694 * - if ds->needs_standalone_vlan_filtering = true, OR if 1695 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1696 * this switch chip which have vlan_filtering=1) 1697 * - the 8021q upper VLANs 1698 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1699 * global, or it is, but no port is under a VLAN-aware bridge): 1700 * - no VLAN (any 8021q upper is a software VLAN) 1701 * 1702 * - If under a vlan_filtering=0 bridge which it offload: 1703 * - if ds->configure_vlan_while_not_filtering = true (default): 1704 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1705 * - else (deprecated): 1706 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1707 * enabled, so this behavior is broken and discouraged. 1708 * 1709 * - If under a vlan_filtering=1 bridge which it offload: 1710 * - the bridge VLANs 1711 * - the 8021q upper VLANs 1712 */ 1713 int dsa_slave_manage_vlan_filtering(struct net_device *slave, 1714 bool vlan_filtering) 1715 { 1716 int err; 1717 1718 if (vlan_filtering) { 1719 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1720 1721 err = vlan_for_each(slave, dsa_slave_restore_vlan, slave); 1722 if (err) { 1723 vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1724 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1725 return err; 1726 } 1727 } else { 1728 err = vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1729 if (err) 1730 return err; 1731 1732 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1733 } 1734 1735 return 0; 1736 } 1737 1738 struct dsa_hw_port { 1739 struct list_head list; 1740 struct net_device *dev; 1741 int old_mtu; 1742 }; 1743 1744 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1745 { 1746 const struct dsa_hw_port *p; 1747 int err; 1748 1749 list_for_each_entry(p, hw_port_list, list) { 1750 if (p->dev->mtu == mtu) 1751 continue; 1752 1753 err = dev_set_mtu(p->dev, mtu); 1754 if (err) 1755 goto rollback; 1756 } 1757 1758 return 0; 1759 1760 rollback: 1761 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1762 if (p->dev->mtu == p->old_mtu) 1763 continue; 1764 1765 if (dev_set_mtu(p->dev, p->old_mtu)) 1766 netdev_err(p->dev, "Failed to restore MTU\n"); 1767 } 1768 1769 return err; 1770 } 1771 1772 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1773 { 1774 struct dsa_hw_port *p, *n; 1775 1776 list_for_each_entry_safe(p, n, hw_port_list, list) 1777 kfree(p); 1778 } 1779 1780 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1781 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1782 { 1783 struct list_head hw_port_list; 1784 struct dsa_switch_tree *dst; 1785 int min_mtu = ETH_MAX_MTU; 1786 struct dsa_port *other_dp; 1787 int err; 1788 1789 if (!dp->ds->mtu_enforcement_ingress) 1790 return; 1791 1792 if (!dp->bridge) 1793 return; 1794 1795 INIT_LIST_HEAD(&hw_port_list); 1796 1797 /* Populate the list of ports that are part of the same bridge 1798 * as the newly added/modified port 1799 */ 1800 list_for_each_entry(dst, &dsa_tree_list, list) { 1801 list_for_each_entry(other_dp, &dst->ports, list) { 1802 struct dsa_hw_port *hw_port; 1803 struct net_device *slave; 1804 1805 if (other_dp->type != DSA_PORT_TYPE_USER) 1806 continue; 1807 1808 if (!dsa_port_bridge_same(dp, other_dp)) 1809 continue; 1810 1811 if (!other_dp->ds->mtu_enforcement_ingress) 1812 continue; 1813 1814 slave = other_dp->slave; 1815 1816 if (min_mtu > slave->mtu) 1817 min_mtu = slave->mtu; 1818 1819 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1820 if (!hw_port) 1821 goto out; 1822 1823 hw_port->dev = slave; 1824 hw_port->old_mtu = slave->mtu; 1825 1826 list_add(&hw_port->list, &hw_port_list); 1827 } 1828 } 1829 1830 /* Attempt to configure the entire hardware bridge to the newly added 1831 * interface's MTU first, regardless of whether the intention of the 1832 * user was to raise or lower it. 1833 */ 1834 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1835 if (!err) 1836 goto out; 1837 1838 /* Clearly that didn't work out so well, so just set the minimum MTU on 1839 * all hardware bridge ports now. If this fails too, then all ports will 1840 * still have their old MTU rolled back anyway. 1841 */ 1842 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1843 1844 out: 1845 dsa_hw_port_list_free(&hw_port_list); 1846 } 1847 1848 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1849 { 1850 struct net_device *master = dsa_slave_to_master(dev); 1851 struct dsa_port *dp = dsa_slave_to_port(dev); 1852 struct dsa_port *cpu_dp = dp->cpu_dp; 1853 struct dsa_switch *ds = dp->ds; 1854 struct dsa_port *other_dp; 1855 int largest_mtu = 0; 1856 int new_master_mtu; 1857 int old_master_mtu; 1858 int mtu_limit; 1859 int cpu_mtu; 1860 int err; 1861 1862 if (!ds->ops->port_change_mtu) 1863 return -EOPNOTSUPP; 1864 1865 dsa_tree_for_each_user_port(other_dp, ds->dst) { 1866 int slave_mtu; 1867 1868 /* During probe, this function will be called for each slave 1869 * device, while not all of them have been allocated. That's 1870 * ok, it doesn't change what the maximum is, so ignore it. 1871 */ 1872 if (!other_dp->slave) 1873 continue; 1874 1875 /* Pretend that we already applied the setting, which we 1876 * actually haven't (still haven't done all integrity checks) 1877 */ 1878 if (dp == other_dp) 1879 slave_mtu = new_mtu; 1880 else 1881 slave_mtu = other_dp->slave->mtu; 1882 1883 if (largest_mtu < slave_mtu) 1884 largest_mtu = slave_mtu; 1885 } 1886 1887 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1888 old_master_mtu = master->mtu; 1889 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops); 1890 if (new_master_mtu > mtu_limit) 1891 return -ERANGE; 1892 1893 /* If the master MTU isn't over limit, there's no need to check the CPU 1894 * MTU, since that surely isn't either. 1895 */ 1896 cpu_mtu = largest_mtu; 1897 1898 /* Start applying stuff */ 1899 if (new_master_mtu != old_master_mtu) { 1900 err = dev_set_mtu(master, new_master_mtu); 1901 if (err < 0) 1902 goto out_master_failed; 1903 1904 /* We only need to propagate the MTU of the CPU port to 1905 * upstream switches, so emit a notifier which updates them. 1906 */ 1907 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 1908 if (err) 1909 goto out_cpu_failed; 1910 } 1911 1912 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 1913 if (err) 1914 goto out_port_failed; 1915 1916 dev->mtu = new_mtu; 1917 1918 dsa_bridge_mtu_normalization(dp); 1919 1920 return 0; 1921 1922 out_port_failed: 1923 if (new_master_mtu != old_master_mtu) 1924 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1925 dsa_tag_protocol_overhead(cpu_dp->tag_ops)); 1926 out_cpu_failed: 1927 if (new_master_mtu != old_master_mtu) 1928 dev_set_mtu(master, old_master_mtu); 1929 out_master_failed: 1930 return err; 1931 } 1932 1933 static int __maybe_unused 1934 dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 1935 { 1936 struct dsa_port *dp = dsa_slave_to_port(dev); 1937 struct dsa_switch *ds = dp->ds; 1938 unsigned long mask, new_prio; 1939 int err, port = dp->index; 1940 1941 if (!ds->ops->port_set_default_prio) 1942 return -EOPNOTSUPP; 1943 1944 err = dcb_ieee_setapp(dev, app); 1945 if (err) 1946 return err; 1947 1948 mask = dcb_ieee_getapp_mask(dev, app); 1949 new_prio = __fls(mask); 1950 1951 err = ds->ops->port_set_default_prio(ds, port, new_prio); 1952 if (err) { 1953 dcb_ieee_delapp(dev, app); 1954 return err; 1955 } 1956 1957 return 0; 1958 } 1959 1960 static int __maybe_unused 1961 dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 1962 { 1963 struct dsa_port *dp = dsa_slave_to_port(dev); 1964 struct dsa_switch *ds = dp->ds; 1965 unsigned long mask, new_prio; 1966 int err, port = dp->index; 1967 u8 dscp = app->protocol; 1968 1969 if (!ds->ops->port_add_dscp_prio) 1970 return -EOPNOTSUPP; 1971 1972 if (dscp >= 64) { 1973 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 1974 dscp); 1975 return -EINVAL; 1976 } 1977 1978 err = dcb_ieee_setapp(dev, app); 1979 if (err) 1980 return err; 1981 1982 mask = dcb_ieee_getapp_mask(dev, app); 1983 new_prio = __fls(mask); 1984 1985 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 1986 if (err) { 1987 dcb_ieee_delapp(dev, app); 1988 return err; 1989 } 1990 1991 return 0; 1992 } 1993 1994 static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev, 1995 struct dcb_app *app) 1996 { 1997 switch (app->selector) { 1998 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 1999 switch (app->protocol) { 2000 case 0: 2001 return dsa_slave_dcbnl_set_default_prio(dev, app); 2002 default: 2003 return -EOPNOTSUPP; 2004 } 2005 break; 2006 case IEEE_8021QAZ_APP_SEL_DSCP: 2007 return dsa_slave_dcbnl_add_dscp_prio(dev, app); 2008 default: 2009 return -EOPNOTSUPP; 2010 } 2011 } 2012 2013 static int __maybe_unused 2014 dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2015 { 2016 struct dsa_port *dp = dsa_slave_to_port(dev); 2017 struct dsa_switch *ds = dp->ds; 2018 unsigned long mask, new_prio; 2019 int err, port = dp->index; 2020 2021 if (!ds->ops->port_set_default_prio) 2022 return -EOPNOTSUPP; 2023 2024 err = dcb_ieee_delapp(dev, app); 2025 if (err) 2026 return err; 2027 2028 mask = dcb_ieee_getapp_mask(dev, app); 2029 new_prio = mask ? __fls(mask) : 0; 2030 2031 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2032 if (err) { 2033 dcb_ieee_setapp(dev, app); 2034 return err; 2035 } 2036 2037 return 0; 2038 } 2039 2040 static int __maybe_unused 2041 dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2042 { 2043 struct dsa_port *dp = dsa_slave_to_port(dev); 2044 struct dsa_switch *ds = dp->ds; 2045 int err, port = dp->index; 2046 u8 dscp = app->protocol; 2047 2048 if (!ds->ops->port_del_dscp_prio) 2049 return -EOPNOTSUPP; 2050 2051 err = dcb_ieee_delapp(dev, app); 2052 if (err) 2053 return err; 2054 2055 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2056 if (err) { 2057 dcb_ieee_setapp(dev, app); 2058 return err; 2059 } 2060 2061 return 0; 2062 } 2063 2064 static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev, 2065 struct dcb_app *app) 2066 { 2067 switch (app->selector) { 2068 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2069 switch (app->protocol) { 2070 case 0: 2071 return dsa_slave_dcbnl_del_default_prio(dev, app); 2072 default: 2073 return -EOPNOTSUPP; 2074 } 2075 break; 2076 case IEEE_8021QAZ_APP_SEL_DSCP: 2077 return dsa_slave_dcbnl_del_dscp_prio(dev, app); 2078 default: 2079 return -EOPNOTSUPP; 2080 } 2081 } 2082 2083 /* Pre-populate the DCB application priority table with the priorities 2084 * configured during switch setup, which we read from hardware here. 2085 */ 2086 static int dsa_slave_dcbnl_init(struct net_device *dev) 2087 { 2088 struct dsa_port *dp = dsa_slave_to_port(dev); 2089 struct dsa_switch *ds = dp->ds; 2090 int port = dp->index; 2091 int err; 2092 2093 if (ds->ops->port_get_default_prio) { 2094 int prio = ds->ops->port_get_default_prio(ds, port); 2095 struct dcb_app app = { 2096 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2097 .protocol = 0, 2098 .priority = prio, 2099 }; 2100 2101 if (prio < 0) 2102 return prio; 2103 2104 err = dcb_ieee_setapp(dev, &app); 2105 if (err) 2106 return err; 2107 } 2108 2109 if (ds->ops->port_get_dscp_prio) { 2110 int protocol; 2111 2112 for (protocol = 0; protocol < 64; protocol++) { 2113 struct dcb_app app = { 2114 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2115 .protocol = protocol, 2116 }; 2117 int prio; 2118 2119 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2120 if (prio == -EOPNOTSUPP) 2121 continue; 2122 if (prio < 0) 2123 return prio; 2124 2125 app.priority = prio; 2126 2127 err = dcb_ieee_setapp(dev, &app); 2128 if (err) 2129 return err; 2130 } 2131 } 2132 2133 return 0; 2134 } 2135 2136 static const struct ethtool_ops dsa_slave_ethtool_ops = { 2137 .get_drvinfo = dsa_slave_get_drvinfo, 2138 .get_regs_len = dsa_slave_get_regs_len, 2139 .get_regs = dsa_slave_get_regs, 2140 .nway_reset = dsa_slave_nway_reset, 2141 .get_link = ethtool_op_get_link, 2142 .get_eeprom_len = dsa_slave_get_eeprom_len, 2143 .get_eeprom = dsa_slave_get_eeprom, 2144 .set_eeprom = dsa_slave_set_eeprom, 2145 .get_strings = dsa_slave_get_strings, 2146 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 2147 .get_sset_count = dsa_slave_get_sset_count, 2148 .get_eth_phy_stats = dsa_slave_get_eth_phy_stats, 2149 .get_eth_mac_stats = dsa_slave_get_eth_mac_stats, 2150 .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats, 2151 .get_rmon_stats = dsa_slave_get_rmon_stats, 2152 .set_wol = dsa_slave_set_wol, 2153 .get_wol = dsa_slave_get_wol, 2154 .set_eee = dsa_slave_set_eee, 2155 .get_eee = dsa_slave_get_eee, 2156 .get_link_ksettings = dsa_slave_get_link_ksettings, 2157 .set_link_ksettings = dsa_slave_set_link_ksettings, 2158 .get_pause_stats = dsa_slave_get_pause_stats, 2159 .get_pauseparam = dsa_slave_get_pauseparam, 2160 .set_pauseparam = dsa_slave_set_pauseparam, 2161 .get_rxnfc = dsa_slave_get_rxnfc, 2162 .set_rxnfc = dsa_slave_set_rxnfc, 2163 .get_ts_info = dsa_slave_get_ts_info, 2164 .self_test = dsa_slave_net_selftest, 2165 }; 2166 2167 static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = { 2168 .ieee_setapp = dsa_slave_dcbnl_ieee_setapp, 2169 .ieee_delapp = dsa_slave_dcbnl_ieee_delapp, 2170 }; 2171 2172 static void dsa_slave_get_stats64(struct net_device *dev, 2173 struct rtnl_link_stats64 *s) 2174 { 2175 struct dsa_port *dp = dsa_slave_to_port(dev); 2176 struct dsa_switch *ds = dp->ds; 2177 2178 if (ds->ops->get_stats64) 2179 ds->ops->get_stats64(ds, dp->index, s); 2180 else 2181 dev_get_tstats64(dev, s); 2182 } 2183 2184 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, 2185 struct net_device_path *path) 2186 { 2187 struct dsa_port *dp = dsa_slave_to_port(ctx->dev); 2188 struct net_device *master = dsa_port_to_master(dp); 2189 struct dsa_port *cpu_dp = dp->cpu_dp; 2190 2191 path->dev = ctx->dev; 2192 path->type = DEV_PATH_DSA; 2193 path->dsa.proto = cpu_dp->tag_ops->proto; 2194 path->dsa.port = dp->index; 2195 ctx->dev = master; 2196 2197 return 0; 2198 } 2199 2200 static const struct net_device_ops dsa_slave_netdev_ops = { 2201 .ndo_open = dsa_slave_open, 2202 .ndo_stop = dsa_slave_close, 2203 .ndo_start_xmit = dsa_slave_xmit, 2204 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 2205 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 2206 .ndo_set_mac_address = dsa_slave_set_mac_address, 2207 .ndo_fdb_dump = dsa_slave_fdb_dump, 2208 .ndo_eth_ioctl = dsa_slave_ioctl, 2209 .ndo_get_iflink = dsa_slave_get_iflink, 2210 #ifdef CONFIG_NET_POLL_CONTROLLER 2211 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 2212 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 2213 .ndo_poll_controller = dsa_slave_poll_controller, 2214 #endif 2215 .ndo_setup_tc = dsa_slave_setup_tc, 2216 .ndo_get_stats64 = dsa_slave_get_stats64, 2217 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 2218 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 2219 .ndo_change_mtu = dsa_slave_change_mtu, 2220 .ndo_fill_forward_path = dsa_slave_fill_forward_path, 2221 }; 2222 2223 static struct device_type dsa_type = { 2224 .name = "dsa", 2225 }; 2226 2227 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2228 { 2229 const struct dsa_port *dp = dsa_to_port(ds, port); 2230 2231 if (dp->pl) 2232 phylink_mac_change(dp->pl, up); 2233 } 2234 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2235 2236 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 2237 struct phylink_link_state *state) 2238 { 2239 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 2240 struct dsa_switch *ds = dp->ds; 2241 2242 /* No need to check that this operation is valid, the callback would 2243 * not be called if it was not. 2244 */ 2245 ds->ops->phylink_fixed_state(ds, dp->index, state); 2246 } 2247 2248 /* slave device setup *******************************************************/ 2249 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr, 2250 u32 flags) 2251 { 2252 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2253 struct dsa_switch *ds = dp->ds; 2254 2255 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 2256 if (!slave_dev->phydev) { 2257 netdev_err(slave_dev, "no phy at %d\n", addr); 2258 return -ENODEV; 2259 } 2260 2261 slave_dev->phydev->dev_flags |= flags; 2262 2263 return phylink_connect_phy(dp->pl, slave_dev->phydev); 2264 } 2265 2266 static int dsa_slave_phy_setup(struct net_device *slave_dev) 2267 { 2268 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2269 struct device_node *port_dn = dp->dn; 2270 struct dsa_switch *ds = dp->ds; 2271 u32 phy_flags = 0; 2272 int ret; 2273 2274 dp->pl_config.dev = &slave_dev->dev; 2275 dp->pl_config.type = PHYLINK_NETDEV; 2276 2277 /* The get_fixed_state callback takes precedence over polling the 2278 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2279 * this if the switch provides such a callback. 2280 */ 2281 if (ds->ops->phylink_fixed_state) { 2282 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 2283 dp->pl_config.poll_fixed_state = true; 2284 } 2285 2286 ret = dsa_port_phylink_create(dp); 2287 if (ret) 2288 return ret; 2289 2290 if (ds->ops->get_phy_flags) 2291 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2292 2293 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2294 if (ret == -ENODEV && ds->slave_mii_bus) { 2295 /* We could not connect to a designated PHY or SFP, so try to 2296 * use the switch internal MDIO bus instead 2297 */ 2298 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags); 2299 } 2300 if (ret) { 2301 netdev_err(slave_dev, "failed to connect to PHY: %pe\n", 2302 ERR_PTR(ret)); 2303 dsa_port_phylink_destroy(dp); 2304 } 2305 2306 return ret; 2307 } 2308 2309 void dsa_slave_setup_tagger(struct net_device *slave) 2310 { 2311 struct dsa_port *dp = dsa_slave_to_port(slave); 2312 struct net_device *master = dsa_port_to_master(dp); 2313 struct dsa_slave_priv *p = netdev_priv(slave); 2314 const struct dsa_port *cpu_dp = dp->cpu_dp; 2315 const struct dsa_switch *ds = dp->ds; 2316 2317 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2318 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2319 /* Try to save one extra realloc later in the TX path (in the master) 2320 * by also inheriting the master's needed headroom and tailroom. 2321 * The 8021q driver also does this. 2322 */ 2323 slave->needed_headroom += master->needed_headroom; 2324 slave->needed_tailroom += master->needed_tailroom; 2325 2326 p->xmit = cpu_dp->tag_ops->xmit; 2327 2328 slave->features = master->vlan_features | NETIF_F_HW_TC; 2329 slave->hw_features |= NETIF_F_HW_TC; 2330 slave->features |= NETIF_F_LLTX; 2331 if (slave->needed_tailroom) 2332 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2333 if (ds->needs_standalone_vlan_filtering) 2334 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2335 } 2336 2337 int dsa_slave_suspend(struct net_device *slave_dev) 2338 { 2339 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2340 2341 if (!netif_running(slave_dev)) 2342 return 0; 2343 2344 netif_device_detach(slave_dev); 2345 2346 rtnl_lock(); 2347 phylink_stop(dp->pl); 2348 rtnl_unlock(); 2349 2350 return 0; 2351 } 2352 2353 int dsa_slave_resume(struct net_device *slave_dev) 2354 { 2355 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2356 2357 if (!netif_running(slave_dev)) 2358 return 0; 2359 2360 netif_device_attach(slave_dev); 2361 2362 rtnl_lock(); 2363 phylink_start(dp->pl); 2364 rtnl_unlock(); 2365 2366 return 0; 2367 } 2368 2369 int dsa_slave_create(struct dsa_port *port) 2370 { 2371 struct net_device *master = dsa_port_to_master(port); 2372 struct dsa_switch *ds = port->ds; 2373 struct net_device *slave_dev; 2374 struct dsa_slave_priv *p; 2375 const char *name; 2376 int assign_type; 2377 int ret; 2378 2379 if (!ds->num_tx_queues) 2380 ds->num_tx_queues = 1; 2381 2382 if (port->name) { 2383 name = port->name; 2384 assign_type = NET_NAME_PREDICTABLE; 2385 } else { 2386 name = "eth%d"; 2387 assign_type = NET_NAME_ENUM; 2388 } 2389 2390 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 2391 assign_type, ether_setup, 2392 ds->num_tx_queues, 1); 2393 if (slave_dev == NULL) 2394 return -ENOMEM; 2395 2396 slave_dev->rtnl_link_ops = &dsa_link_ops; 2397 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 2398 #if IS_ENABLED(CONFIG_DCB) 2399 slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops; 2400 #endif 2401 if (!is_zero_ether_addr(port->mac)) 2402 eth_hw_addr_set(slave_dev, port->mac); 2403 else 2404 eth_hw_addr_inherit(slave_dev, master); 2405 slave_dev->priv_flags |= IFF_NO_QUEUE; 2406 if (dsa_switch_supports_uc_filtering(ds)) 2407 slave_dev->priv_flags |= IFF_UNICAST_FLT; 2408 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 2409 if (ds->ops->port_max_mtu) 2410 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2411 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 2412 2413 SET_NETDEV_DEV(slave_dev, port->ds->dev); 2414 SET_NETDEV_DEVLINK_PORT(slave_dev, &port->devlink_port); 2415 slave_dev->dev.of_node = port->dn; 2416 slave_dev->vlan_features = master->vlan_features; 2417 2418 p = netdev_priv(slave_dev); 2419 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2420 if (!slave_dev->tstats) { 2421 free_netdev(slave_dev); 2422 return -ENOMEM; 2423 } 2424 2425 ret = gro_cells_init(&p->gcells, slave_dev); 2426 if (ret) 2427 goto out_free; 2428 2429 p->dp = port; 2430 INIT_LIST_HEAD(&p->mall_tc_list); 2431 port->slave = slave_dev; 2432 dsa_slave_setup_tagger(slave_dev); 2433 2434 netif_carrier_off(slave_dev); 2435 2436 ret = dsa_slave_phy_setup(slave_dev); 2437 if (ret) { 2438 netdev_err(slave_dev, 2439 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2440 ret, ds->dst->index, ds->index, port->index); 2441 goto out_gcells; 2442 } 2443 2444 rtnl_lock(); 2445 2446 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 2447 if (ret && ret != -EOPNOTSUPP) 2448 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2449 ret, ETH_DATA_LEN, port->index); 2450 2451 ret = register_netdevice(slave_dev); 2452 if (ret) { 2453 netdev_err(master, "error %d registering interface %s\n", 2454 ret, slave_dev->name); 2455 rtnl_unlock(); 2456 goto out_phy; 2457 } 2458 2459 if (IS_ENABLED(CONFIG_DCB)) { 2460 ret = dsa_slave_dcbnl_init(slave_dev); 2461 if (ret) { 2462 netdev_err(slave_dev, 2463 "failed to initialize DCB: %pe\n", 2464 ERR_PTR(ret)); 2465 rtnl_unlock(); 2466 goto out_unregister; 2467 } 2468 } 2469 2470 ret = netdev_upper_dev_link(master, slave_dev, NULL); 2471 2472 rtnl_unlock(); 2473 2474 if (ret) 2475 goto out_unregister; 2476 2477 return 0; 2478 2479 out_unregister: 2480 unregister_netdev(slave_dev); 2481 out_phy: 2482 rtnl_lock(); 2483 phylink_disconnect_phy(p->dp->pl); 2484 rtnl_unlock(); 2485 dsa_port_phylink_destroy(p->dp); 2486 out_gcells: 2487 gro_cells_destroy(&p->gcells); 2488 out_free: 2489 free_percpu(slave_dev->tstats); 2490 free_netdev(slave_dev); 2491 port->slave = NULL; 2492 return ret; 2493 } 2494 2495 void dsa_slave_destroy(struct net_device *slave_dev) 2496 { 2497 struct net_device *master = dsa_slave_to_master(slave_dev); 2498 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2499 struct dsa_slave_priv *p = netdev_priv(slave_dev); 2500 2501 netif_carrier_off(slave_dev); 2502 rtnl_lock(); 2503 netdev_upper_dev_unlink(master, slave_dev); 2504 unregister_netdevice(slave_dev); 2505 phylink_disconnect_phy(dp->pl); 2506 rtnl_unlock(); 2507 2508 dsa_port_phylink_destroy(dp); 2509 gro_cells_destroy(&p->gcells); 2510 free_percpu(slave_dev->tstats); 2511 free_netdev(slave_dev); 2512 } 2513 2514 int dsa_slave_change_master(struct net_device *dev, struct net_device *master, 2515 struct netlink_ext_ack *extack) 2516 { 2517 struct net_device *old_master = dsa_slave_to_master(dev); 2518 struct dsa_port *dp = dsa_slave_to_port(dev); 2519 struct dsa_switch *ds = dp->ds; 2520 struct net_device *upper; 2521 struct list_head *iter; 2522 int err; 2523 2524 if (master == old_master) 2525 return 0; 2526 2527 if (!ds->ops->port_change_master) { 2528 NL_SET_ERR_MSG_MOD(extack, 2529 "Driver does not support changing DSA master"); 2530 return -EOPNOTSUPP; 2531 } 2532 2533 if (!netdev_uses_dsa(master)) { 2534 NL_SET_ERR_MSG_MOD(extack, 2535 "Interface not eligible as DSA master"); 2536 return -EOPNOTSUPP; 2537 } 2538 2539 netdev_for_each_upper_dev_rcu(master, upper, iter) { 2540 if (dsa_slave_dev_check(upper)) 2541 continue; 2542 if (netif_is_bridge_master(upper)) 2543 continue; 2544 NL_SET_ERR_MSG_MOD(extack, "Cannot join master with unknown uppers"); 2545 return -EOPNOTSUPP; 2546 } 2547 2548 /* Since we allow live-changing the DSA master, plus we auto-open the 2549 * DSA master when the user port opens => we need to ensure that the 2550 * new DSA master is open too. 2551 */ 2552 if (dev->flags & IFF_UP) { 2553 err = dev_open(master, extack); 2554 if (err) 2555 return err; 2556 } 2557 2558 netdev_upper_dev_unlink(old_master, dev); 2559 2560 err = netdev_upper_dev_link(master, dev, extack); 2561 if (err) 2562 goto out_revert_old_master_unlink; 2563 2564 err = dsa_port_change_master(dp, master, extack); 2565 if (err) 2566 goto out_revert_master_link; 2567 2568 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2569 err = dsa_slave_change_mtu(dev, dev->mtu); 2570 if (err && err != -EOPNOTSUPP) { 2571 netdev_warn(dev, 2572 "nonfatal error updating MTU with new master: %pe\n", 2573 ERR_PTR(err)); 2574 } 2575 2576 /* If the port doesn't have its own MAC address and relies on the DSA 2577 * master's one, inherit it again from the new DSA master. 2578 */ 2579 if (is_zero_ether_addr(dp->mac)) 2580 eth_hw_addr_inherit(dev, master); 2581 2582 return 0; 2583 2584 out_revert_master_link: 2585 netdev_upper_dev_unlink(master, dev); 2586 out_revert_old_master_unlink: 2587 netdev_upper_dev_link(old_master, dev, NULL); 2588 return err; 2589 } 2590 2591 bool dsa_slave_dev_check(const struct net_device *dev) 2592 { 2593 return dev->netdev_ops == &dsa_slave_netdev_ops; 2594 } 2595 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 2596 2597 static int dsa_slave_changeupper(struct net_device *dev, 2598 struct netdev_notifier_changeupper_info *info) 2599 { 2600 struct dsa_port *dp = dsa_slave_to_port(dev); 2601 struct netlink_ext_ack *extack; 2602 int err = NOTIFY_DONE; 2603 2604 if (!dsa_slave_dev_check(dev)) 2605 return err; 2606 2607 extack = netdev_notifier_info_to_extack(&info->info); 2608 2609 if (netif_is_bridge_master(info->upper_dev)) { 2610 if (info->linking) { 2611 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2612 if (!err) 2613 dsa_bridge_mtu_normalization(dp); 2614 if (err == -EOPNOTSUPP) { 2615 if (extack && !extack->_msg) 2616 NL_SET_ERR_MSG_MOD(extack, 2617 "Offloading not supported"); 2618 err = 0; 2619 } 2620 err = notifier_from_errno(err); 2621 } else { 2622 dsa_port_bridge_leave(dp, info->upper_dev); 2623 err = NOTIFY_OK; 2624 } 2625 } else if (netif_is_lag_master(info->upper_dev)) { 2626 if (info->linking) { 2627 err = dsa_port_lag_join(dp, info->upper_dev, 2628 info->upper_info, extack); 2629 if (err == -EOPNOTSUPP) { 2630 NL_SET_ERR_MSG_MOD(info->info.extack, 2631 "Offloading not supported"); 2632 err = 0; 2633 } 2634 err = notifier_from_errno(err); 2635 } else { 2636 dsa_port_lag_leave(dp, info->upper_dev); 2637 err = NOTIFY_OK; 2638 } 2639 } else if (is_hsr_master(info->upper_dev)) { 2640 if (info->linking) { 2641 err = dsa_port_hsr_join(dp, info->upper_dev); 2642 if (err == -EOPNOTSUPP) { 2643 NL_SET_ERR_MSG_MOD(info->info.extack, 2644 "Offloading not supported"); 2645 err = 0; 2646 } 2647 err = notifier_from_errno(err); 2648 } else { 2649 dsa_port_hsr_leave(dp, info->upper_dev); 2650 err = NOTIFY_OK; 2651 } 2652 } 2653 2654 return err; 2655 } 2656 2657 static int dsa_slave_prechangeupper(struct net_device *dev, 2658 struct netdev_notifier_changeupper_info *info) 2659 { 2660 struct dsa_port *dp = dsa_slave_to_port(dev); 2661 2662 if (!dsa_slave_dev_check(dev)) 2663 return NOTIFY_DONE; 2664 2665 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2666 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2667 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2668 dsa_port_pre_lag_leave(dp, info->upper_dev); 2669 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be 2670 * meaningfully enslaved to a bridge yet 2671 */ 2672 2673 return NOTIFY_DONE; 2674 } 2675 2676 static int 2677 dsa_slave_lag_changeupper(struct net_device *dev, 2678 struct netdev_notifier_changeupper_info *info) 2679 { 2680 struct net_device *lower; 2681 struct list_head *iter; 2682 int err = NOTIFY_DONE; 2683 struct dsa_port *dp; 2684 2685 if (!netif_is_lag_master(dev)) 2686 return err; 2687 2688 netdev_for_each_lower_dev(dev, lower, iter) { 2689 if (!dsa_slave_dev_check(lower)) 2690 continue; 2691 2692 dp = dsa_slave_to_port(lower); 2693 if (!dp->lag) 2694 /* Software LAG */ 2695 continue; 2696 2697 err = dsa_slave_changeupper(lower, info); 2698 if (notifier_to_errno(err)) 2699 break; 2700 } 2701 2702 return err; 2703 } 2704 2705 /* Same as dsa_slave_lag_changeupper() except that it calls 2706 * dsa_slave_prechangeupper() 2707 */ 2708 static int 2709 dsa_slave_lag_prechangeupper(struct net_device *dev, 2710 struct netdev_notifier_changeupper_info *info) 2711 { 2712 struct net_device *lower; 2713 struct list_head *iter; 2714 int err = NOTIFY_DONE; 2715 struct dsa_port *dp; 2716 2717 if (!netif_is_lag_master(dev)) 2718 return err; 2719 2720 netdev_for_each_lower_dev(dev, lower, iter) { 2721 if (!dsa_slave_dev_check(lower)) 2722 continue; 2723 2724 dp = dsa_slave_to_port(lower); 2725 if (!dp->lag) 2726 /* Software LAG */ 2727 continue; 2728 2729 err = dsa_slave_prechangeupper(lower, info); 2730 if (notifier_to_errno(err)) 2731 break; 2732 } 2733 2734 return err; 2735 } 2736 2737 static int 2738 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 2739 struct netdev_notifier_changeupper_info *info) 2740 { 2741 struct netlink_ext_ack *ext_ack; 2742 struct net_device *slave, *br; 2743 struct dsa_port *dp; 2744 2745 ext_ack = netdev_notifier_info_to_extack(&info->info); 2746 2747 if (!is_vlan_dev(dev)) 2748 return NOTIFY_DONE; 2749 2750 slave = vlan_dev_real_dev(dev); 2751 if (!dsa_slave_dev_check(slave)) 2752 return NOTIFY_DONE; 2753 2754 dp = dsa_slave_to_port(slave); 2755 br = dsa_port_bridge_dev_get(dp); 2756 if (!br) 2757 return NOTIFY_DONE; 2758 2759 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 2760 if (br_vlan_enabled(br) && 2761 netif_is_bridge_master(info->upper_dev) && info->linking) { 2762 NL_SET_ERR_MSG_MOD(ext_ack, 2763 "Cannot enslave VLAN device into VLAN aware bridge"); 2764 return notifier_from_errno(-EINVAL); 2765 } 2766 2767 return NOTIFY_DONE; 2768 } 2769 2770 static int 2771 dsa_slave_check_8021q_upper(struct net_device *dev, 2772 struct netdev_notifier_changeupper_info *info) 2773 { 2774 struct dsa_port *dp = dsa_slave_to_port(dev); 2775 struct net_device *br = dsa_port_bridge_dev_get(dp); 2776 struct bridge_vlan_info br_info; 2777 struct netlink_ext_ack *extack; 2778 int err = NOTIFY_DONE; 2779 u16 vid; 2780 2781 if (!br || !br_vlan_enabled(br)) 2782 return NOTIFY_DONE; 2783 2784 extack = netdev_notifier_info_to_extack(&info->info); 2785 vid = vlan_dev_vlan_id(info->upper_dev); 2786 2787 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2788 * device, respectively the VID is not found, returning 2789 * 0 means success, which is a failure for us here. 2790 */ 2791 err = br_vlan_get_info(br, vid, &br_info); 2792 if (err == 0) { 2793 NL_SET_ERR_MSG_MOD(extack, 2794 "This VLAN is already configured by the bridge"); 2795 return notifier_from_errno(-EBUSY); 2796 } 2797 2798 return NOTIFY_DONE; 2799 } 2800 2801 static int 2802 dsa_slave_prechangeupper_sanity_check(struct net_device *dev, 2803 struct netdev_notifier_changeupper_info *info) 2804 { 2805 struct dsa_switch *ds; 2806 struct dsa_port *dp; 2807 int err; 2808 2809 if (!dsa_slave_dev_check(dev)) 2810 return dsa_prevent_bridging_8021q_upper(dev, info); 2811 2812 dp = dsa_slave_to_port(dev); 2813 ds = dp->ds; 2814 2815 if (ds->ops->port_prechangeupper) { 2816 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2817 if (err) 2818 return notifier_from_errno(err); 2819 } 2820 2821 if (is_vlan_dev(info->upper_dev)) 2822 return dsa_slave_check_8021q_upper(dev, info); 2823 2824 return NOTIFY_DONE; 2825 } 2826 2827 /* To be eligible as a DSA master, a LAG must have all lower interfaces be 2828 * eligible DSA masters. Additionally, all LAG slaves must be DSA masters of 2829 * switches in the same switch tree. 2830 */ 2831 static int dsa_lag_master_validate(struct net_device *lag_dev, 2832 struct netlink_ext_ack *extack) 2833 { 2834 struct net_device *lower1, *lower2; 2835 struct list_head *iter1, *iter2; 2836 2837 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 2838 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 2839 if (!netdev_uses_dsa(lower1) || 2840 !netdev_uses_dsa(lower2)) { 2841 NL_SET_ERR_MSG_MOD(extack, 2842 "All LAG ports must be eligible as DSA masters"); 2843 return notifier_from_errno(-EINVAL); 2844 } 2845 2846 if (lower1 == lower2) 2847 continue; 2848 2849 if (!dsa_port_tree_same(lower1->dsa_ptr, 2850 lower2->dsa_ptr)) { 2851 NL_SET_ERR_MSG_MOD(extack, 2852 "LAG contains DSA masters of disjoint switch trees"); 2853 return notifier_from_errno(-EINVAL); 2854 } 2855 } 2856 } 2857 2858 return NOTIFY_DONE; 2859 } 2860 2861 static int 2862 dsa_master_prechangeupper_sanity_check(struct net_device *master, 2863 struct netdev_notifier_changeupper_info *info) 2864 { 2865 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2866 2867 if (!netdev_uses_dsa(master)) 2868 return NOTIFY_DONE; 2869 2870 if (!info->linking) 2871 return NOTIFY_DONE; 2872 2873 /* Allow DSA switch uppers */ 2874 if (dsa_slave_dev_check(info->upper_dev)) 2875 return NOTIFY_DONE; 2876 2877 /* Allow bridge uppers of DSA masters, subject to further 2878 * restrictions in dsa_bridge_prechangelower_sanity_check() 2879 */ 2880 if (netif_is_bridge_master(info->upper_dev)) 2881 return NOTIFY_DONE; 2882 2883 /* Allow LAG uppers, subject to further restrictions in 2884 * dsa_lag_master_prechangelower_sanity_check() 2885 */ 2886 if (netif_is_lag_master(info->upper_dev)) 2887 return dsa_lag_master_validate(info->upper_dev, extack); 2888 2889 NL_SET_ERR_MSG_MOD(extack, 2890 "DSA master cannot join unknown upper interfaces"); 2891 return notifier_from_errno(-EBUSY); 2892 } 2893 2894 static int 2895 dsa_lag_master_prechangelower_sanity_check(struct net_device *dev, 2896 struct netdev_notifier_changeupper_info *info) 2897 { 2898 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2899 struct net_device *lag_dev = info->upper_dev; 2900 struct net_device *lower; 2901 struct list_head *iter; 2902 2903 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 2904 return NOTIFY_DONE; 2905 2906 if (!info->linking) 2907 return NOTIFY_DONE; 2908 2909 if (!netdev_uses_dsa(dev)) { 2910 NL_SET_ERR_MSG(extack, 2911 "Only DSA masters can join a LAG DSA master"); 2912 return notifier_from_errno(-EINVAL); 2913 } 2914 2915 netdev_for_each_lower_dev(lag_dev, lower, iter) { 2916 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 2917 NL_SET_ERR_MSG(extack, 2918 "Interface is DSA master for a different switch tree than this LAG"); 2919 return notifier_from_errno(-EINVAL); 2920 } 2921 2922 break; 2923 } 2924 2925 return NOTIFY_DONE; 2926 } 2927 2928 /* Don't allow bridging of DSA masters, since the bridge layer rx_handler 2929 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 2930 * chance to strip off and parse the DSA switch tag protocol header (the bridge 2931 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 2932 * frames). 2933 * The only case where that would not be an issue is when bridging can already 2934 * be offloaded, such as when the DSA master is itself a DSA or plain switchdev 2935 * port, and is bridged only with other ports from the same hardware device. 2936 */ 2937 static int 2938 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 2939 struct netdev_notifier_changeupper_info *info) 2940 { 2941 struct net_device *br = info->upper_dev; 2942 struct netlink_ext_ack *extack; 2943 struct net_device *lower; 2944 struct list_head *iter; 2945 2946 if (!netif_is_bridge_master(br)) 2947 return NOTIFY_DONE; 2948 2949 if (!info->linking) 2950 return NOTIFY_DONE; 2951 2952 extack = netdev_notifier_info_to_extack(&info->info); 2953 2954 netdev_for_each_lower_dev(br, lower, iter) { 2955 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 2956 continue; 2957 2958 if (!netdev_port_same_parent_id(lower, new_lower)) { 2959 NL_SET_ERR_MSG(extack, 2960 "Cannot do software bridging with a DSA master"); 2961 return notifier_from_errno(-EINVAL); 2962 } 2963 } 2964 2965 return NOTIFY_DONE; 2966 } 2967 2968 static void dsa_tree_migrate_ports_from_lag_master(struct dsa_switch_tree *dst, 2969 struct net_device *lag_dev) 2970 { 2971 struct net_device *new_master = dsa_tree_find_first_master(dst); 2972 struct dsa_port *dp; 2973 int err; 2974 2975 dsa_tree_for_each_user_port(dp, dst) { 2976 if (dsa_port_to_master(dp) != lag_dev) 2977 continue; 2978 2979 err = dsa_slave_change_master(dp->slave, new_master, NULL); 2980 if (err) { 2981 netdev_err(dp->slave, 2982 "failed to restore master to %s: %pe\n", 2983 new_master->name, ERR_PTR(err)); 2984 } 2985 } 2986 } 2987 2988 static int dsa_master_lag_join(struct net_device *master, 2989 struct net_device *lag_dev, 2990 struct netdev_lag_upper_info *uinfo, 2991 struct netlink_ext_ack *extack) 2992 { 2993 struct dsa_port *cpu_dp = master->dsa_ptr; 2994 struct dsa_switch_tree *dst = cpu_dp->dst; 2995 struct dsa_port *dp; 2996 int err; 2997 2998 err = dsa_master_lag_setup(lag_dev, cpu_dp, uinfo, extack); 2999 if (err) 3000 return err; 3001 3002 dsa_tree_for_each_user_port(dp, dst) { 3003 if (dsa_port_to_master(dp) != master) 3004 continue; 3005 3006 err = dsa_slave_change_master(dp->slave, lag_dev, extack); 3007 if (err) 3008 goto restore; 3009 } 3010 3011 return 0; 3012 3013 restore: 3014 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3015 if (dsa_port_to_master(dp) != lag_dev) 3016 continue; 3017 3018 err = dsa_slave_change_master(dp->slave, master, NULL); 3019 if (err) { 3020 netdev_err(dp->slave, 3021 "failed to restore master to %s: %pe\n", 3022 master->name, ERR_PTR(err)); 3023 } 3024 } 3025 3026 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3027 3028 return err; 3029 } 3030 3031 static void dsa_master_lag_leave(struct net_device *master, 3032 struct net_device *lag_dev) 3033 { 3034 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3035 struct dsa_switch_tree *dst = cpu_dp->dst; 3036 struct dsa_port *new_cpu_dp = NULL; 3037 struct net_device *lower; 3038 struct list_head *iter; 3039 3040 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3041 if (netdev_uses_dsa(lower)) { 3042 new_cpu_dp = lower->dsa_ptr; 3043 break; 3044 } 3045 } 3046 3047 if (new_cpu_dp) { 3048 /* Update the CPU port of the user ports still under the LAG 3049 * so that dsa_port_to_master() continues to work properly 3050 */ 3051 dsa_tree_for_each_user_port(dp, dst) 3052 if (dsa_port_to_master(dp) == lag_dev) 3053 dp->cpu_dp = new_cpu_dp; 3054 3055 /* Update the index of the virtual CPU port to match the lowest 3056 * physical CPU port 3057 */ 3058 lag_dev->dsa_ptr = new_cpu_dp; 3059 wmb(); 3060 } else { 3061 /* If the LAG DSA master has no ports left, migrate back all 3062 * user ports to the first physical CPU port 3063 */ 3064 dsa_tree_migrate_ports_from_lag_master(dst, lag_dev); 3065 } 3066 3067 /* This DSA master has left its LAG in any case, so let 3068 * the CPU port leave the hardware LAG as well 3069 */ 3070 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3071 } 3072 3073 static int dsa_master_changeupper(struct net_device *dev, 3074 struct netdev_notifier_changeupper_info *info) 3075 { 3076 struct netlink_ext_ack *extack; 3077 int err = NOTIFY_DONE; 3078 3079 if (!netdev_uses_dsa(dev)) 3080 return err; 3081 3082 extack = netdev_notifier_info_to_extack(&info->info); 3083 3084 if (netif_is_lag_master(info->upper_dev)) { 3085 if (info->linking) { 3086 err = dsa_master_lag_join(dev, info->upper_dev, 3087 info->upper_info, extack); 3088 err = notifier_from_errno(err); 3089 } else { 3090 dsa_master_lag_leave(dev, info->upper_dev); 3091 err = NOTIFY_OK; 3092 } 3093 } 3094 3095 return err; 3096 } 3097 3098 static int dsa_slave_netdevice_event(struct notifier_block *nb, 3099 unsigned long event, void *ptr) 3100 { 3101 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3102 3103 switch (event) { 3104 case NETDEV_PRECHANGEUPPER: { 3105 struct netdev_notifier_changeupper_info *info = ptr; 3106 int err; 3107 3108 err = dsa_slave_prechangeupper_sanity_check(dev, info); 3109 if (notifier_to_errno(err)) 3110 return err; 3111 3112 err = dsa_master_prechangeupper_sanity_check(dev, info); 3113 if (notifier_to_errno(err)) 3114 return err; 3115 3116 err = dsa_lag_master_prechangelower_sanity_check(dev, info); 3117 if (notifier_to_errno(err)) 3118 return err; 3119 3120 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3121 if (notifier_to_errno(err)) 3122 return err; 3123 3124 err = dsa_slave_prechangeupper(dev, ptr); 3125 if (notifier_to_errno(err)) 3126 return err; 3127 3128 err = dsa_slave_lag_prechangeupper(dev, ptr); 3129 if (notifier_to_errno(err)) 3130 return err; 3131 3132 break; 3133 } 3134 case NETDEV_CHANGEUPPER: { 3135 int err; 3136 3137 err = dsa_slave_changeupper(dev, ptr); 3138 if (notifier_to_errno(err)) 3139 return err; 3140 3141 err = dsa_slave_lag_changeupper(dev, ptr); 3142 if (notifier_to_errno(err)) 3143 return err; 3144 3145 err = dsa_master_changeupper(dev, ptr); 3146 if (notifier_to_errno(err)) 3147 return err; 3148 3149 break; 3150 } 3151 case NETDEV_CHANGELOWERSTATE: { 3152 struct netdev_notifier_changelowerstate_info *info = ptr; 3153 struct dsa_port *dp; 3154 int err = 0; 3155 3156 if (dsa_slave_dev_check(dev)) { 3157 dp = dsa_slave_to_port(dev); 3158 3159 err = dsa_port_lag_change(dp, info->lower_state_info); 3160 } 3161 3162 /* Mirror LAG port events on DSA masters that are in 3163 * a LAG towards their respective switch CPU ports 3164 */ 3165 if (netdev_uses_dsa(dev)) { 3166 dp = dev->dsa_ptr; 3167 3168 err = dsa_port_lag_change(dp, info->lower_state_info); 3169 } 3170 3171 return notifier_from_errno(err); 3172 } 3173 case NETDEV_CHANGE: 3174 case NETDEV_UP: { 3175 /* Track state of master port. 3176 * DSA driver may require the master port (and indirectly 3177 * the tagger) to be available for some special operation. 3178 */ 3179 if (netdev_uses_dsa(dev)) { 3180 struct dsa_port *cpu_dp = dev->dsa_ptr; 3181 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3182 3183 /* Track when the master port is UP */ 3184 dsa_tree_master_oper_state_change(dst, dev, 3185 netif_oper_up(dev)); 3186 3187 /* Track when the master port is ready and can accept 3188 * packet. 3189 * NETDEV_UP event is not enough to flag a port as ready. 3190 * We also have to wait for linkwatch_do_dev to dev_activate 3191 * and emit a NETDEV_CHANGE event. 3192 * We check if a master port is ready by checking if the dev 3193 * have a qdisc assigned and is not noop. 3194 */ 3195 dsa_tree_master_admin_state_change(dst, dev, 3196 !qdisc_tx_is_noop(dev)); 3197 3198 return NOTIFY_OK; 3199 } 3200 3201 return NOTIFY_DONE; 3202 } 3203 case NETDEV_GOING_DOWN: { 3204 struct dsa_port *dp, *cpu_dp; 3205 struct dsa_switch_tree *dst; 3206 LIST_HEAD(close_list); 3207 3208 if (!netdev_uses_dsa(dev)) 3209 return NOTIFY_DONE; 3210 3211 cpu_dp = dev->dsa_ptr; 3212 dst = cpu_dp->ds->dst; 3213 3214 dsa_tree_master_admin_state_change(dst, dev, false); 3215 3216 list_for_each_entry(dp, &dst->ports, list) { 3217 if (!dsa_port_is_user(dp)) 3218 continue; 3219 3220 if (dp->cpu_dp != cpu_dp) 3221 continue; 3222 3223 list_add(&dp->slave->close_list, &close_list); 3224 } 3225 3226 dev_close_many(&close_list, true); 3227 3228 return NOTIFY_OK; 3229 } 3230 default: 3231 break; 3232 } 3233 3234 return NOTIFY_DONE; 3235 } 3236 3237 static void 3238 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3239 { 3240 struct switchdev_notifier_fdb_info info = {}; 3241 3242 info.addr = switchdev_work->addr; 3243 info.vid = switchdev_work->vid; 3244 info.offloaded = true; 3245 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3246 switchdev_work->orig_dev, &info.info, NULL); 3247 } 3248 3249 static void dsa_slave_switchdev_event_work(struct work_struct *work) 3250 { 3251 struct dsa_switchdev_event_work *switchdev_work = 3252 container_of(work, struct dsa_switchdev_event_work, work); 3253 const unsigned char *addr = switchdev_work->addr; 3254 struct net_device *dev = switchdev_work->dev; 3255 u16 vid = switchdev_work->vid; 3256 struct dsa_switch *ds; 3257 struct dsa_port *dp; 3258 int err; 3259 3260 dp = dsa_slave_to_port(dev); 3261 ds = dp->ds; 3262 3263 switch (switchdev_work->event) { 3264 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3265 if (switchdev_work->host_addr) 3266 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3267 else if (dp->lag) 3268 err = dsa_port_lag_fdb_add(dp, addr, vid); 3269 else 3270 err = dsa_port_fdb_add(dp, addr, vid); 3271 if (err) { 3272 dev_err(ds->dev, 3273 "port %d failed to add %pM vid %d to fdb: %d\n", 3274 dp->index, addr, vid, err); 3275 break; 3276 } 3277 dsa_fdb_offload_notify(switchdev_work); 3278 break; 3279 3280 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3281 if (switchdev_work->host_addr) 3282 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3283 else if (dp->lag) 3284 err = dsa_port_lag_fdb_del(dp, addr, vid); 3285 else 3286 err = dsa_port_fdb_del(dp, addr, vid); 3287 if (err) { 3288 dev_err(ds->dev, 3289 "port %d failed to delete %pM vid %d from fdb: %d\n", 3290 dp->index, addr, vid, err); 3291 } 3292 3293 break; 3294 } 3295 3296 kfree(switchdev_work); 3297 } 3298 3299 static bool dsa_foreign_dev_check(const struct net_device *dev, 3300 const struct net_device *foreign_dev) 3301 { 3302 const struct dsa_port *dp = dsa_slave_to_port(dev); 3303 struct dsa_switch_tree *dst = dp->ds->dst; 3304 3305 if (netif_is_bridge_master(foreign_dev)) 3306 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3307 3308 if (netif_is_bridge_port(foreign_dev)) 3309 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3310 3311 /* Everything else is foreign */ 3312 return true; 3313 } 3314 3315 static int dsa_slave_fdb_event(struct net_device *dev, 3316 struct net_device *orig_dev, 3317 unsigned long event, const void *ctx, 3318 const struct switchdev_notifier_fdb_info *fdb_info) 3319 { 3320 struct dsa_switchdev_event_work *switchdev_work; 3321 struct dsa_port *dp = dsa_slave_to_port(dev); 3322 bool host_addr = fdb_info->is_local; 3323 struct dsa_switch *ds = dp->ds; 3324 3325 if (ctx && ctx != dp) 3326 return 0; 3327 3328 if (!dp->bridge) 3329 return 0; 3330 3331 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3332 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3333 return 0; 3334 3335 /* FDB entries learned by the software bridge or by foreign 3336 * bridge ports should be installed as host addresses only if 3337 * the driver requests assisted learning. 3338 */ 3339 if (!ds->assisted_learning_on_cpu_port) 3340 return 0; 3341 } 3342 3343 /* Also treat FDB entries on foreign interfaces bridged with us as host 3344 * addresses. 3345 */ 3346 if (dsa_foreign_dev_check(dev, orig_dev)) 3347 host_addr = true; 3348 3349 /* Check early that we're not doing work in vain. 3350 * Host addresses on LAG ports still require regular FDB ops, 3351 * since the CPU port isn't in a LAG. 3352 */ 3353 if (dp->lag && !host_addr) { 3354 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3355 return -EOPNOTSUPP; 3356 } else { 3357 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3358 return -EOPNOTSUPP; 3359 } 3360 3361 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3362 if (!switchdev_work) 3363 return -ENOMEM; 3364 3365 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3366 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3367 orig_dev->name, fdb_info->addr, fdb_info->vid, 3368 host_addr ? " as host address" : ""); 3369 3370 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work); 3371 switchdev_work->event = event; 3372 switchdev_work->dev = dev; 3373 switchdev_work->orig_dev = orig_dev; 3374 3375 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3376 switchdev_work->vid = fdb_info->vid; 3377 switchdev_work->host_addr = host_addr; 3378 3379 dsa_schedule_work(&switchdev_work->work); 3380 3381 return 0; 3382 } 3383 3384 /* Called under rcu_read_lock() */ 3385 static int dsa_slave_switchdev_event(struct notifier_block *unused, 3386 unsigned long event, void *ptr) 3387 { 3388 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3389 int err; 3390 3391 switch (event) { 3392 case SWITCHDEV_PORT_ATTR_SET: 3393 err = switchdev_handle_port_attr_set(dev, ptr, 3394 dsa_slave_dev_check, 3395 dsa_slave_port_attr_set); 3396 return notifier_from_errno(err); 3397 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3398 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3399 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3400 dsa_slave_dev_check, 3401 dsa_foreign_dev_check, 3402 dsa_slave_fdb_event); 3403 return notifier_from_errno(err); 3404 default: 3405 return NOTIFY_DONE; 3406 } 3407 3408 return NOTIFY_OK; 3409 } 3410 3411 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 3412 unsigned long event, void *ptr) 3413 { 3414 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3415 int err; 3416 3417 switch (event) { 3418 case SWITCHDEV_PORT_OBJ_ADD: 3419 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3420 dsa_slave_dev_check, 3421 dsa_foreign_dev_check, 3422 dsa_slave_port_obj_add); 3423 return notifier_from_errno(err); 3424 case SWITCHDEV_PORT_OBJ_DEL: 3425 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3426 dsa_slave_dev_check, 3427 dsa_foreign_dev_check, 3428 dsa_slave_port_obj_del); 3429 return notifier_from_errno(err); 3430 case SWITCHDEV_PORT_ATTR_SET: 3431 err = switchdev_handle_port_attr_set(dev, ptr, 3432 dsa_slave_dev_check, 3433 dsa_slave_port_attr_set); 3434 return notifier_from_errno(err); 3435 } 3436 3437 return NOTIFY_DONE; 3438 } 3439 3440 static struct notifier_block dsa_slave_nb __read_mostly = { 3441 .notifier_call = dsa_slave_netdevice_event, 3442 }; 3443 3444 struct notifier_block dsa_slave_switchdev_notifier = { 3445 .notifier_call = dsa_slave_switchdev_event, 3446 }; 3447 3448 struct notifier_block dsa_slave_switchdev_blocking_notifier = { 3449 .notifier_call = dsa_slave_switchdev_blocking_event, 3450 }; 3451 3452 int dsa_slave_register_notifier(void) 3453 { 3454 struct notifier_block *nb; 3455 int err; 3456 3457 err = register_netdevice_notifier(&dsa_slave_nb); 3458 if (err) 3459 return err; 3460 3461 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 3462 if (err) 3463 goto err_switchdev_nb; 3464 3465 nb = &dsa_slave_switchdev_blocking_notifier; 3466 err = register_switchdev_blocking_notifier(nb); 3467 if (err) 3468 goto err_switchdev_blocking_nb; 3469 3470 return 0; 3471 3472 err_switchdev_blocking_nb: 3473 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3474 err_switchdev_nb: 3475 unregister_netdevice_notifier(&dsa_slave_nb); 3476 return err; 3477 } 3478 3479 void dsa_slave_unregister_notifier(void) 3480 { 3481 struct notifier_block *nb; 3482 int err; 3483 3484 nb = &dsa_slave_switchdev_blocking_notifier; 3485 err = unregister_switchdev_blocking_notifier(nb); 3486 if (err) 3487 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3488 3489 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3490 if (err) 3491 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3492 3493 err = unregister_netdevice_notifier(&dsa_slave_nb); 3494 if (err) 3495 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 3496 } 3497