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.h" 26 #include "dsa_priv.h" 27 #include "port.h" 28 #include "master.h" 29 #include "slave.h" 30 #include "tag.h" 31 32 static void dsa_slave_standalone_event_work(struct work_struct *work) 33 { 34 struct dsa_standalone_event_work *standalone_work = 35 container_of(work, struct dsa_standalone_event_work, work); 36 const unsigned char *addr = standalone_work->addr; 37 struct net_device *dev = standalone_work->dev; 38 struct dsa_port *dp = dsa_slave_to_port(dev); 39 struct switchdev_obj_port_mdb mdb; 40 struct dsa_switch *ds = dp->ds; 41 u16 vid = standalone_work->vid; 42 int err; 43 44 switch (standalone_work->event) { 45 case DSA_UC_ADD: 46 err = dsa_port_standalone_host_fdb_add(dp, addr, vid); 47 if (err) { 48 dev_err(ds->dev, 49 "port %d failed to add %pM vid %d to fdb: %d\n", 50 dp->index, addr, vid, err); 51 break; 52 } 53 break; 54 55 case DSA_UC_DEL: 56 err = dsa_port_standalone_host_fdb_del(dp, addr, vid); 57 if (err) { 58 dev_err(ds->dev, 59 "port %d failed to delete %pM vid %d from fdb: %d\n", 60 dp->index, addr, vid, err); 61 } 62 63 break; 64 case DSA_MC_ADD: 65 ether_addr_copy(mdb.addr, addr); 66 mdb.vid = vid; 67 68 err = dsa_port_standalone_host_mdb_add(dp, &mdb); 69 if (err) { 70 dev_err(ds->dev, 71 "port %d failed to add %pM vid %d to mdb: %d\n", 72 dp->index, addr, vid, err); 73 break; 74 } 75 break; 76 case DSA_MC_DEL: 77 ether_addr_copy(mdb.addr, addr); 78 mdb.vid = vid; 79 80 err = dsa_port_standalone_host_mdb_del(dp, &mdb); 81 if (err) { 82 dev_err(ds->dev, 83 "port %d failed to delete %pM vid %d from mdb: %d\n", 84 dp->index, addr, vid, err); 85 } 86 87 break; 88 } 89 90 kfree(standalone_work); 91 } 92 93 static int dsa_slave_schedule_standalone_work(struct net_device *dev, 94 enum dsa_standalone_event event, 95 const unsigned char *addr, 96 u16 vid) 97 { 98 struct dsa_standalone_event_work *standalone_work; 99 100 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC); 101 if (!standalone_work) 102 return -ENOMEM; 103 104 INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work); 105 standalone_work->event = event; 106 standalone_work->dev = dev; 107 108 ether_addr_copy(standalone_work->addr, addr); 109 standalone_work->vid = vid; 110 111 dsa_schedule_work(&standalone_work->work); 112 113 return 0; 114 } 115 116 static int dsa_slave_sync_uc(struct net_device *dev, 117 const unsigned char *addr) 118 { 119 struct net_device *master = dsa_slave_to_master(dev); 120 struct dsa_port *dp = dsa_slave_to_port(dev); 121 122 dev_uc_add(master, addr); 123 124 if (!dsa_switch_supports_uc_filtering(dp->ds)) 125 return 0; 126 127 return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0); 128 } 129 130 static int dsa_slave_unsync_uc(struct net_device *dev, 131 const unsigned char *addr) 132 { 133 struct net_device *master = dsa_slave_to_master(dev); 134 struct dsa_port *dp = dsa_slave_to_port(dev); 135 136 dev_uc_del(master, addr); 137 138 if (!dsa_switch_supports_uc_filtering(dp->ds)) 139 return 0; 140 141 return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0); 142 } 143 144 static int dsa_slave_sync_mc(struct net_device *dev, 145 const unsigned char *addr) 146 { 147 struct net_device *master = dsa_slave_to_master(dev); 148 struct dsa_port *dp = dsa_slave_to_port(dev); 149 150 dev_mc_add(master, addr); 151 152 if (!dsa_switch_supports_mc_filtering(dp->ds)) 153 return 0; 154 155 return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0); 156 } 157 158 static int dsa_slave_unsync_mc(struct net_device *dev, 159 const unsigned char *addr) 160 { 161 struct net_device *master = dsa_slave_to_master(dev); 162 struct dsa_port *dp = dsa_slave_to_port(dev); 163 164 dev_mc_del(master, addr); 165 166 if (!dsa_switch_supports_mc_filtering(dp->ds)) 167 return 0; 168 169 return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0); 170 } 171 172 void dsa_slave_sync_ha(struct net_device *dev) 173 { 174 struct dsa_port *dp = dsa_slave_to_port(dev); 175 struct dsa_switch *ds = dp->ds; 176 struct netdev_hw_addr *ha; 177 178 netif_addr_lock_bh(dev); 179 180 netdev_for_each_synced_mc_addr(ha, dev) 181 dsa_slave_sync_mc(dev, ha->addr); 182 183 netdev_for_each_synced_uc_addr(ha, dev) 184 dsa_slave_sync_uc(dev, ha->addr); 185 186 netif_addr_unlock_bh(dev); 187 188 if (dsa_switch_supports_uc_filtering(ds) || 189 dsa_switch_supports_mc_filtering(ds)) 190 dsa_flush_workqueue(); 191 } 192 193 void dsa_slave_unsync_ha(struct net_device *dev) 194 { 195 struct dsa_port *dp = dsa_slave_to_port(dev); 196 struct dsa_switch *ds = dp->ds; 197 struct netdev_hw_addr *ha; 198 199 netif_addr_lock_bh(dev); 200 201 netdev_for_each_synced_uc_addr(ha, dev) 202 dsa_slave_unsync_uc(dev, ha->addr); 203 204 netdev_for_each_synced_mc_addr(ha, dev) 205 dsa_slave_unsync_mc(dev, ha->addr); 206 207 netif_addr_unlock_bh(dev); 208 209 if (dsa_switch_supports_uc_filtering(ds) || 210 dsa_switch_supports_mc_filtering(ds)) 211 dsa_flush_workqueue(); 212 } 213 214 /* slave mii_bus handling ***************************************************/ 215 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 216 { 217 struct dsa_switch *ds = bus->priv; 218 219 if (ds->phys_mii_mask & (1 << addr)) 220 return ds->ops->phy_read(ds, addr, reg); 221 222 return 0xffff; 223 } 224 225 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 226 { 227 struct dsa_switch *ds = bus->priv; 228 229 if (ds->phys_mii_mask & (1 << addr)) 230 return ds->ops->phy_write(ds, addr, reg, val); 231 232 return 0; 233 } 234 235 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 236 { 237 ds->slave_mii_bus->priv = (void *)ds; 238 ds->slave_mii_bus->name = "dsa slave smi"; 239 ds->slave_mii_bus->read = dsa_slave_phy_read; 240 ds->slave_mii_bus->write = dsa_slave_phy_write; 241 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 242 ds->dst->index, ds->index); 243 ds->slave_mii_bus->parent = ds->dev; 244 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 245 } 246 247 248 /* slave device handling ****************************************************/ 249 static int dsa_slave_get_iflink(const struct net_device *dev) 250 { 251 return dsa_slave_to_master(dev)->ifindex; 252 } 253 254 static int dsa_slave_open(struct net_device *dev) 255 { 256 struct net_device *master = dsa_slave_to_master(dev); 257 struct dsa_port *dp = dsa_slave_to_port(dev); 258 struct dsa_switch *ds = dp->ds; 259 int err; 260 261 err = dev_open(master, NULL); 262 if (err < 0) { 263 netdev_err(dev, "failed to open master %s\n", master->name); 264 goto out; 265 } 266 267 if (dsa_switch_supports_uc_filtering(ds)) { 268 err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0); 269 if (err) 270 goto out; 271 } 272 273 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 274 err = dev_uc_add(master, dev->dev_addr); 275 if (err < 0) 276 goto del_host_addr; 277 } 278 279 err = dsa_port_enable_rt(dp, dev->phydev); 280 if (err) 281 goto del_unicast; 282 283 return 0; 284 285 del_unicast: 286 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 287 dev_uc_del(master, dev->dev_addr); 288 del_host_addr: 289 if (dsa_switch_supports_uc_filtering(ds)) 290 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 291 out: 292 return err; 293 } 294 295 static int dsa_slave_close(struct net_device *dev) 296 { 297 struct net_device *master = dsa_slave_to_master(dev); 298 struct dsa_port *dp = dsa_slave_to_port(dev); 299 struct dsa_switch *ds = dp->ds; 300 301 dsa_port_disable_rt(dp); 302 303 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 304 dev_uc_del(master, dev->dev_addr); 305 306 if (dsa_switch_supports_uc_filtering(ds)) 307 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 308 309 return 0; 310 } 311 312 static void dsa_slave_manage_host_flood(struct net_device *dev) 313 { 314 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI); 315 struct dsa_port *dp = dsa_slave_to_port(dev); 316 bool uc = dev->flags & IFF_PROMISC; 317 318 dsa_port_set_host_flood(dp, uc, mc); 319 } 320 321 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 322 { 323 struct net_device *master = dsa_slave_to_master(dev); 324 struct dsa_port *dp = dsa_slave_to_port(dev); 325 struct dsa_switch *ds = dp->ds; 326 327 if (change & IFF_ALLMULTI) 328 dev_set_allmulti(master, 329 dev->flags & IFF_ALLMULTI ? 1 : -1); 330 if (change & IFF_PROMISC) 331 dev_set_promiscuity(master, 332 dev->flags & IFF_PROMISC ? 1 : -1); 333 334 if (dsa_switch_supports_uc_filtering(ds) && 335 dsa_switch_supports_mc_filtering(ds)) 336 dsa_slave_manage_host_flood(dev); 337 } 338 339 static void dsa_slave_set_rx_mode(struct net_device *dev) 340 { 341 __dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc); 342 __dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc); 343 } 344 345 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 346 { 347 struct net_device *master = dsa_slave_to_master(dev); 348 struct dsa_port *dp = dsa_slave_to_port(dev); 349 struct dsa_switch *ds = dp->ds; 350 struct sockaddr *addr = a; 351 int err; 352 353 if (!is_valid_ether_addr(addr->sa_data)) 354 return -EADDRNOTAVAIL; 355 356 /* If the port is down, the address isn't synced yet to hardware or 357 * to the DSA master, so there is nothing to change. 358 */ 359 if (!(dev->flags & IFF_UP)) 360 goto out_change_dev_addr; 361 362 if (dsa_switch_supports_uc_filtering(ds)) { 363 err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0); 364 if (err) 365 return err; 366 } 367 368 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 369 err = dev_uc_add(master, addr->sa_data); 370 if (err < 0) 371 goto del_unicast; 372 } 373 374 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 375 dev_uc_del(master, dev->dev_addr); 376 377 if (dsa_switch_supports_uc_filtering(ds)) 378 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 379 380 out_change_dev_addr: 381 eth_hw_addr_set(dev, addr->sa_data); 382 383 return 0; 384 385 del_unicast: 386 if (dsa_switch_supports_uc_filtering(ds)) 387 dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0); 388 389 return err; 390 } 391 392 struct dsa_slave_dump_ctx { 393 struct net_device *dev; 394 struct sk_buff *skb; 395 struct netlink_callback *cb; 396 int idx; 397 }; 398 399 static int 400 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 401 bool is_static, void *data) 402 { 403 struct dsa_slave_dump_ctx *dump = data; 404 u32 portid = NETLINK_CB(dump->cb->skb).portid; 405 u32 seq = dump->cb->nlh->nlmsg_seq; 406 struct nlmsghdr *nlh; 407 struct ndmsg *ndm; 408 409 if (dump->idx < dump->cb->args[2]) 410 goto skip; 411 412 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 413 sizeof(*ndm), NLM_F_MULTI); 414 if (!nlh) 415 return -EMSGSIZE; 416 417 ndm = nlmsg_data(nlh); 418 ndm->ndm_family = AF_BRIDGE; 419 ndm->ndm_pad1 = 0; 420 ndm->ndm_pad2 = 0; 421 ndm->ndm_flags = NTF_SELF; 422 ndm->ndm_type = 0; 423 ndm->ndm_ifindex = dump->dev->ifindex; 424 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 425 426 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 427 goto nla_put_failure; 428 429 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 430 goto nla_put_failure; 431 432 nlmsg_end(dump->skb, nlh); 433 434 skip: 435 dump->idx++; 436 return 0; 437 438 nla_put_failure: 439 nlmsg_cancel(dump->skb, nlh); 440 return -EMSGSIZE; 441 } 442 443 static int 444 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 445 struct net_device *dev, struct net_device *filter_dev, 446 int *idx) 447 { 448 struct dsa_port *dp = dsa_slave_to_port(dev); 449 struct dsa_slave_dump_ctx dump = { 450 .dev = dev, 451 .skb = skb, 452 .cb = cb, 453 .idx = *idx, 454 }; 455 int err; 456 457 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 458 *idx = dump.idx; 459 460 return err; 461 } 462 463 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 464 { 465 struct dsa_slave_priv *p = netdev_priv(dev); 466 struct dsa_switch *ds = p->dp->ds; 467 int port = p->dp->index; 468 469 /* Pass through to switch driver if it supports timestamping */ 470 switch (cmd) { 471 case SIOCGHWTSTAMP: 472 if (ds->ops->port_hwtstamp_get) 473 return ds->ops->port_hwtstamp_get(ds, port, ifr); 474 break; 475 case SIOCSHWTSTAMP: 476 if (ds->ops->port_hwtstamp_set) 477 return ds->ops->port_hwtstamp_set(ds, port, ifr); 478 break; 479 } 480 481 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 482 } 483 484 static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx, 485 const struct switchdev_attr *attr, 486 struct netlink_ext_ack *extack) 487 { 488 struct dsa_port *dp = dsa_slave_to_port(dev); 489 int ret; 490 491 if (ctx && ctx != dp) 492 return 0; 493 494 switch (attr->id) { 495 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 496 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 497 return -EOPNOTSUPP; 498 499 ret = dsa_port_set_state(dp, attr->u.stp_state, true); 500 break; 501 case SWITCHDEV_ATTR_ID_PORT_MST_STATE: 502 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 503 return -EOPNOTSUPP; 504 505 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack); 506 break; 507 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 508 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 509 return -EOPNOTSUPP; 510 511 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 512 extack); 513 break; 514 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 515 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 516 return -EOPNOTSUPP; 517 518 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 519 break; 520 case SWITCHDEV_ATTR_ID_BRIDGE_MST: 521 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 522 return -EOPNOTSUPP; 523 524 ret = dsa_port_mst_enable(dp, attr->u.mst, extack); 525 break; 526 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 527 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 528 return -EOPNOTSUPP; 529 530 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 531 extack); 532 break; 533 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 534 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 535 return -EOPNOTSUPP; 536 537 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 538 break; 539 case SWITCHDEV_ATTR_ID_VLAN_MSTI: 540 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 541 return -EOPNOTSUPP; 542 543 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti); 544 break; 545 default: 546 ret = -EOPNOTSUPP; 547 break; 548 } 549 550 return ret; 551 } 552 553 /* Must be called under rcu_read_lock() */ 554 static int 555 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave, 556 const struct switchdev_obj_port_vlan *vlan) 557 { 558 struct net_device *upper_dev; 559 struct list_head *iter; 560 561 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 562 u16 vid; 563 564 if (!is_vlan_dev(upper_dev)) 565 continue; 566 567 vid = vlan_dev_vlan_id(upper_dev); 568 if (vid == vlan->vid) 569 return -EBUSY; 570 } 571 572 return 0; 573 } 574 575 static int dsa_slave_vlan_add(struct net_device *dev, 576 const struct switchdev_obj *obj, 577 struct netlink_ext_ack *extack) 578 { 579 struct dsa_port *dp = dsa_slave_to_port(dev); 580 struct switchdev_obj_port_vlan *vlan; 581 int err; 582 583 if (dsa_port_skip_vlan_configuration(dp)) { 584 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 585 return 0; 586 } 587 588 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 589 590 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 591 * the same VID. 592 */ 593 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { 594 rcu_read_lock(); 595 err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan); 596 rcu_read_unlock(); 597 if (err) { 598 NL_SET_ERR_MSG_MOD(extack, 599 "Port already has a VLAN upper with this VID"); 600 return err; 601 } 602 } 603 604 return dsa_port_vlan_add(dp, vlan, extack); 605 } 606 607 /* Offload a VLAN installed on the bridge or on a foreign interface by 608 * installing it as a VLAN towards the CPU port. 609 */ 610 static int dsa_slave_host_vlan_add(struct net_device *dev, 611 const struct switchdev_obj *obj, 612 struct netlink_ext_ack *extack) 613 { 614 struct dsa_port *dp = dsa_slave_to_port(dev); 615 struct switchdev_obj_port_vlan vlan; 616 617 /* Do nothing if this is a software bridge */ 618 if (!dp->bridge) 619 return -EOPNOTSUPP; 620 621 if (dsa_port_skip_vlan_configuration(dp)) { 622 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 623 return 0; 624 } 625 626 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 627 628 /* Even though drivers often handle CPU membership in special ways, 629 * it doesn't make sense to program a PVID, so clear this flag. 630 */ 631 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 632 633 return dsa_port_host_vlan_add(dp, &vlan, extack); 634 } 635 636 static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, 637 const struct switchdev_obj *obj, 638 struct netlink_ext_ack *extack) 639 { 640 struct dsa_port *dp = dsa_slave_to_port(dev); 641 int err; 642 643 if (ctx && ctx != dp) 644 return 0; 645 646 switch (obj->id) { 647 case SWITCHDEV_OBJ_ID_PORT_MDB: 648 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 649 return -EOPNOTSUPP; 650 651 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 652 break; 653 case SWITCHDEV_OBJ_ID_HOST_MDB: 654 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 655 return -EOPNOTSUPP; 656 657 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 658 break; 659 case SWITCHDEV_OBJ_ID_PORT_VLAN: 660 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 661 err = dsa_slave_vlan_add(dev, obj, extack); 662 else 663 err = dsa_slave_host_vlan_add(dev, obj, extack); 664 break; 665 case SWITCHDEV_OBJ_ID_MRP: 666 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 667 return -EOPNOTSUPP; 668 669 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 670 break; 671 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 672 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 673 return -EOPNOTSUPP; 674 675 err = dsa_port_mrp_add_ring_role(dp, 676 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 677 break; 678 default: 679 err = -EOPNOTSUPP; 680 break; 681 } 682 683 return err; 684 } 685 686 static int dsa_slave_vlan_del(struct net_device *dev, 687 const struct switchdev_obj *obj) 688 { 689 struct dsa_port *dp = dsa_slave_to_port(dev); 690 struct switchdev_obj_port_vlan *vlan; 691 692 if (dsa_port_skip_vlan_configuration(dp)) 693 return 0; 694 695 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 696 697 return dsa_port_vlan_del(dp, vlan); 698 } 699 700 static int dsa_slave_host_vlan_del(struct net_device *dev, 701 const struct switchdev_obj *obj) 702 { 703 struct dsa_port *dp = dsa_slave_to_port(dev); 704 struct switchdev_obj_port_vlan *vlan; 705 706 /* Do nothing if this is a software bridge */ 707 if (!dp->bridge) 708 return -EOPNOTSUPP; 709 710 if (dsa_port_skip_vlan_configuration(dp)) 711 return 0; 712 713 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 714 715 return dsa_port_host_vlan_del(dp, vlan); 716 } 717 718 static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx, 719 const struct switchdev_obj *obj) 720 { 721 struct dsa_port *dp = dsa_slave_to_port(dev); 722 int err; 723 724 if (ctx && ctx != dp) 725 return 0; 726 727 switch (obj->id) { 728 case SWITCHDEV_OBJ_ID_PORT_MDB: 729 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 730 return -EOPNOTSUPP; 731 732 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 733 break; 734 case SWITCHDEV_OBJ_ID_HOST_MDB: 735 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 736 return -EOPNOTSUPP; 737 738 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 739 break; 740 case SWITCHDEV_OBJ_ID_PORT_VLAN: 741 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 742 err = dsa_slave_vlan_del(dev, obj); 743 else 744 err = dsa_slave_host_vlan_del(dev, obj); 745 break; 746 case SWITCHDEV_OBJ_ID_MRP: 747 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 748 return -EOPNOTSUPP; 749 750 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 751 break; 752 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 753 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 754 return -EOPNOTSUPP; 755 756 err = dsa_port_mrp_del_ring_role(dp, 757 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 758 break; 759 default: 760 err = -EOPNOTSUPP; 761 break; 762 } 763 764 return err; 765 } 766 767 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 768 struct sk_buff *skb) 769 { 770 #ifdef CONFIG_NET_POLL_CONTROLLER 771 struct dsa_slave_priv *p = netdev_priv(dev); 772 773 return netpoll_send_skb(p->netpoll, skb); 774 #else 775 BUG(); 776 return NETDEV_TX_OK; 777 #endif 778 } 779 780 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 781 struct sk_buff *skb) 782 { 783 struct dsa_switch *ds = p->dp->ds; 784 785 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 786 return; 787 788 if (!ds->ops->port_txtstamp) 789 return; 790 791 ds->ops->port_txtstamp(ds, p->dp->index, skb); 792 } 793 794 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 795 { 796 /* SKB for netpoll still need to be mangled with the protocol-specific 797 * tag to be successfully transmitted 798 */ 799 if (unlikely(netpoll_tx_running(dev))) 800 return dsa_slave_netpoll_send_skb(dev, skb); 801 802 /* Queue the SKB for transmission on the parent interface, but 803 * do not modify its EtherType 804 */ 805 skb->dev = dsa_slave_to_master(dev); 806 dev_queue_xmit(skb); 807 808 return NETDEV_TX_OK; 809 } 810 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 811 812 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) 813 { 814 int needed_headroom = dev->needed_headroom; 815 int needed_tailroom = dev->needed_tailroom; 816 817 /* For tail taggers, we need to pad short frames ourselves, to ensure 818 * that the tail tag does not fail at its role of being at the end of 819 * the packet, once the master interface pads the frame. Account for 820 * that pad length here, and pad later. 821 */ 822 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) 823 needed_tailroom += ETH_ZLEN - skb->len; 824 /* skb_headroom() returns unsigned int... */ 825 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); 826 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); 827 828 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) 829 /* No reallocation needed, yay! */ 830 return 0; 831 832 return pskb_expand_head(skb, needed_headroom, needed_tailroom, 833 GFP_ATOMIC); 834 } 835 836 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 837 { 838 struct dsa_slave_priv *p = netdev_priv(dev); 839 struct sk_buff *nskb; 840 841 dev_sw_netstats_tx_add(dev, 1, skb->len); 842 843 memset(skb->cb, 0, sizeof(skb->cb)); 844 845 /* Handle tx timestamp if any */ 846 dsa_skb_tx_timestamp(p, skb); 847 848 if (dsa_realloc_skb(skb, dev)) { 849 dev_kfree_skb_any(skb); 850 return NETDEV_TX_OK; 851 } 852 853 /* needed_tailroom should still be 'warm' in the cache line from 854 * dsa_realloc_skb(), which has also ensured that padding is safe. 855 */ 856 if (dev->needed_tailroom) 857 eth_skb_pad(skb); 858 859 /* Transmit function may have to reallocate the original SKB, 860 * in which case it must have freed it. Only free it here on error. 861 */ 862 nskb = p->xmit(skb, dev); 863 if (!nskb) { 864 kfree_skb(skb); 865 return NETDEV_TX_OK; 866 } 867 868 return dsa_enqueue_skb(nskb, dev); 869 } 870 871 /* ethtool operations *******************************************************/ 872 873 static void dsa_slave_get_drvinfo(struct net_device *dev, 874 struct ethtool_drvinfo *drvinfo) 875 { 876 strscpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 877 strscpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 878 strscpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 879 } 880 881 static int dsa_slave_get_regs_len(struct net_device *dev) 882 { 883 struct dsa_port *dp = dsa_slave_to_port(dev); 884 struct dsa_switch *ds = dp->ds; 885 886 if (ds->ops->get_regs_len) 887 return ds->ops->get_regs_len(ds, dp->index); 888 889 return -EOPNOTSUPP; 890 } 891 892 static void 893 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 894 { 895 struct dsa_port *dp = dsa_slave_to_port(dev); 896 struct dsa_switch *ds = dp->ds; 897 898 if (ds->ops->get_regs) 899 ds->ops->get_regs(ds, dp->index, regs, _p); 900 } 901 902 static int dsa_slave_nway_reset(struct net_device *dev) 903 { 904 struct dsa_port *dp = dsa_slave_to_port(dev); 905 906 return phylink_ethtool_nway_reset(dp->pl); 907 } 908 909 static int dsa_slave_get_eeprom_len(struct net_device *dev) 910 { 911 struct dsa_port *dp = dsa_slave_to_port(dev); 912 struct dsa_switch *ds = dp->ds; 913 914 if (ds->cd && ds->cd->eeprom_len) 915 return ds->cd->eeprom_len; 916 917 if (ds->ops->get_eeprom_len) 918 return ds->ops->get_eeprom_len(ds); 919 920 return 0; 921 } 922 923 static int dsa_slave_get_eeprom(struct net_device *dev, 924 struct ethtool_eeprom *eeprom, u8 *data) 925 { 926 struct dsa_port *dp = dsa_slave_to_port(dev); 927 struct dsa_switch *ds = dp->ds; 928 929 if (ds->ops->get_eeprom) 930 return ds->ops->get_eeprom(ds, eeprom, data); 931 932 return -EOPNOTSUPP; 933 } 934 935 static int dsa_slave_set_eeprom(struct net_device *dev, 936 struct ethtool_eeprom *eeprom, u8 *data) 937 { 938 struct dsa_port *dp = dsa_slave_to_port(dev); 939 struct dsa_switch *ds = dp->ds; 940 941 if (ds->ops->set_eeprom) 942 return ds->ops->set_eeprom(ds, eeprom, data); 943 944 return -EOPNOTSUPP; 945 } 946 947 static void dsa_slave_get_strings(struct net_device *dev, 948 uint32_t stringset, uint8_t *data) 949 { 950 struct dsa_port *dp = dsa_slave_to_port(dev); 951 struct dsa_switch *ds = dp->ds; 952 953 if (stringset == ETH_SS_STATS) { 954 int len = ETH_GSTRING_LEN; 955 956 strncpy(data, "tx_packets", len); 957 strncpy(data + len, "tx_bytes", len); 958 strncpy(data + 2 * len, "rx_packets", len); 959 strncpy(data + 3 * len, "rx_bytes", len); 960 if (ds->ops->get_strings) 961 ds->ops->get_strings(ds, dp->index, stringset, 962 data + 4 * len); 963 } else if (stringset == ETH_SS_TEST) { 964 net_selftest_get_strings(data); 965 } 966 967 } 968 969 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 970 struct ethtool_stats *stats, 971 uint64_t *data) 972 { 973 struct dsa_port *dp = dsa_slave_to_port(dev); 974 struct dsa_switch *ds = dp->ds; 975 struct pcpu_sw_netstats *s; 976 unsigned int start; 977 int i; 978 979 for_each_possible_cpu(i) { 980 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 981 982 s = per_cpu_ptr(dev->tstats, i); 983 do { 984 start = u64_stats_fetch_begin(&s->syncp); 985 tx_packets = u64_stats_read(&s->tx_packets); 986 tx_bytes = u64_stats_read(&s->tx_bytes); 987 rx_packets = u64_stats_read(&s->rx_packets); 988 rx_bytes = u64_stats_read(&s->rx_bytes); 989 } while (u64_stats_fetch_retry(&s->syncp, start)); 990 data[0] += tx_packets; 991 data[1] += tx_bytes; 992 data[2] += rx_packets; 993 data[3] += rx_bytes; 994 } 995 if (ds->ops->get_ethtool_stats) 996 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 997 } 998 999 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 1000 { 1001 struct dsa_port *dp = dsa_slave_to_port(dev); 1002 struct dsa_switch *ds = dp->ds; 1003 1004 if (sset == ETH_SS_STATS) { 1005 int count = 0; 1006 1007 if (ds->ops->get_sset_count) { 1008 count = ds->ops->get_sset_count(ds, dp->index, sset); 1009 if (count < 0) 1010 return count; 1011 } 1012 1013 return count + 4; 1014 } else if (sset == ETH_SS_TEST) { 1015 return net_selftest_get_count(); 1016 } 1017 1018 return -EOPNOTSUPP; 1019 } 1020 1021 static void dsa_slave_get_eth_phy_stats(struct net_device *dev, 1022 struct ethtool_eth_phy_stats *phy_stats) 1023 { 1024 struct dsa_port *dp = dsa_slave_to_port(dev); 1025 struct dsa_switch *ds = dp->ds; 1026 1027 if (ds->ops->get_eth_phy_stats) 1028 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats); 1029 } 1030 1031 static void dsa_slave_get_eth_mac_stats(struct net_device *dev, 1032 struct ethtool_eth_mac_stats *mac_stats) 1033 { 1034 struct dsa_port *dp = dsa_slave_to_port(dev); 1035 struct dsa_switch *ds = dp->ds; 1036 1037 if (ds->ops->get_eth_mac_stats) 1038 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats); 1039 } 1040 1041 static void 1042 dsa_slave_get_eth_ctrl_stats(struct net_device *dev, 1043 struct ethtool_eth_ctrl_stats *ctrl_stats) 1044 { 1045 struct dsa_port *dp = dsa_slave_to_port(dev); 1046 struct dsa_switch *ds = dp->ds; 1047 1048 if (ds->ops->get_eth_ctrl_stats) 1049 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats); 1050 } 1051 1052 static void 1053 dsa_slave_get_rmon_stats(struct net_device *dev, 1054 struct ethtool_rmon_stats *rmon_stats, 1055 const struct ethtool_rmon_hist_range **ranges) 1056 { 1057 struct dsa_port *dp = dsa_slave_to_port(dev); 1058 struct dsa_switch *ds = dp->ds; 1059 1060 if (ds->ops->get_rmon_stats) 1061 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges); 1062 } 1063 1064 static void dsa_slave_net_selftest(struct net_device *ndev, 1065 struct ethtool_test *etest, u64 *buf) 1066 { 1067 struct dsa_port *dp = dsa_slave_to_port(ndev); 1068 struct dsa_switch *ds = dp->ds; 1069 1070 if (ds->ops->self_test) { 1071 ds->ops->self_test(ds, dp->index, etest, buf); 1072 return; 1073 } 1074 1075 net_selftest(ndev, etest, buf); 1076 } 1077 1078 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1079 { 1080 struct dsa_port *dp = dsa_slave_to_port(dev); 1081 struct dsa_switch *ds = dp->ds; 1082 1083 phylink_ethtool_get_wol(dp->pl, w); 1084 1085 if (ds->ops->get_wol) 1086 ds->ops->get_wol(ds, dp->index, w); 1087 } 1088 1089 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1090 { 1091 struct dsa_port *dp = dsa_slave_to_port(dev); 1092 struct dsa_switch *ds = dp->ds; 1093 int ret = -EOPNOTSUPP; 1094 1095 phylink_ethtool_set_wol(dp->pl, w); 1096 1097 if (ds->ops->set_wol) 1098 ret = ds->ops->set_wol(ds, dp->index, w); 1099 1100 return ret; 1101 } 1102 1103 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 1104 { 1105 struct dsa_port *dp = dsa_slave_to_port(dev); 1106 struct dsa_switch *ds = dp->ds; 1107 int ret; 1108 1109 /* Port's PHY and MAC both need to be EEE capable */ 1110 if (!dev->phydev || !dp->pl) 1111 return -ENODEV; 1112 1113 if (!ds->ops->set_mac_eee) 1114 return -EOPNOTSUPP; 1115 1116 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1117 if (ret) 1118 return ret; 1119 1120 return phylink_ethtool_set_eee(dp->pl, e); 1121 } 1122 1123 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 1124 { 1125 struct dsa_port *dp = dsa_slave_to_port(dev); 1126 struct dsa_switch *ds = dp->ds; 1127 int ret; 1128 1129 /* Port's PHY and MAC both need to be EEE capable */ 1130 if (!dev->phydev || !dp->pl) 1131 return -ENODEV; 1132 1133 if (!ds->ops->get_mac_eee) 1134 return -EOPNOTSUPP; 1135 1136 ret = ds->ops->get_mac_eee(ds, dp->index, e); 1137 if (ret) 1138 return ret; 1139 1140 return phylink_ethtool_get_eee(dp->pl, e); 1141 } 1142 1143 static int dsa_slave_get_link_ksettings(struct net_device *dev, 1144 struct ethtool_link_ksettings *cmd) 1145 { 1146 struct dsa_port *dp = dsa_slave_to_port(dev); 1147 1148 return phylink_ethtool_ksettings_get(dp->pl, cmd); 1149 } 1150 1151 static int dsa_slave_set_link_ksettings(struct net_device *dev, 1152 const struct ethtool_link_ksettings *cmd) 1153 { 1154 struct dsa_port *dp = dsa_slave_to_port(dev); 1155 1156 return phylink_ethtool_ksettings_set(dp->pl, cmd); 1157 } 1158 1159 static void dsa_slave_get_pause_stats(struct net_device *dev, 1160 struct ethtool_pause_stats *pause_stats) 1161 { 1162 struct dsa_port *dp = dsa_slave_to_port(dev); 1163 struct dsa_switch *ds = dp->ds; 1164 1165 if (ds->ops->get_pause_stats) 1166 ds->ops->get_pause_stats(ds, dp->index, pause_stats); 1167 } 1168 1169 static void dsa_slave_get_pauseparam(struct net_device *dev, 1170 struct ethtool_pauseparam *pause) 1171 { 1172 struct dsa_port *dp = dsa_slave_to_port(dev); 1173 1174 phylink_ethtool_get_pauseparam(dp->pl, pause); 1175 } 1176 1177 static int dsa_slave_set_pauseparam(struct net_device *dev, 1178 struct ethtool_pauseparam *pause) 1179 { 1180 struct dsa_port *dp = dsa_slave_to_port(dev); 1181 1182 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1183 } 1184 1185 #ifdef CONFIG_NET_POLL_CONTROLLER 1186 static int dsa_slave_netpoll_setup(struct net_device *dev, 1187 struct netpoll_info *ni) 1188 { 1189 struct net_device *master = dsa_slave_to_master(dev); 1190 struct dsa_slave_priv *p = netdev_priv(dev); 1191 struct netpoll *netpoll; 1192 int err = 0; 1193 1194 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1195 if (!netpoll) 1196 return -ENOMEM; 1197 1198 err = __netpoll_setup(netpoll, master); 1199 if (err) { 1200 kfree(netpoll); 1201 goto out; 1202 } 1203 1204 p->netpoll = netpoll; 1205 out: 1206 return err; 1207 } 1208 1209 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 1210 { 1211 struct dsa_slave_priv *p = netdev_priv(dev); 1212 struct netpoll *netpoll = p->netpoll; 1213 1214 if (!netpoll) 1215 return; 1216 1217 p->netpoll = NULL; 1218 1219 __netpoll_free(netpoll); 1220 } 1221 1222 static void dsa_slave_poll_controller(struct net_device *dev) 1223 { 1224 } 1225 #endif 1226 1227 static struct dsa_mall_tc_entry * 1228 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1229 { 1230 struct dsa_slave_priv *p = netdev_priv(dev); 1231 struct dsa_mall_tc_entry *mall_tc_entry; 1232 1233 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1234 if (mall_tc_entry->cookie == cookie) 1235 return mall_tc_entry; 1236 1237 return NULL; 1238 } 1239 1240 static int 1241 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 1242 struct tc_cls_matchall_offload *cls, 1243 bool ingress) 1244 { 1245 struct netlink_ext_ack *extack = cls->common.extack; 1246 struct dsa_port *dp = dsa_slave_to_port(dev); 1247 struct dsa_slave_priv *p = netdev_priv(dev); 1248 struct dsa_mall_mirror_tc_entry *mirror; 1249 struct dsa_mall_tc_entry *mall_tc_entry; 1250 struct dsa_switch *ds = dp->ds; 1251 struct flow_action_entry *act; 1252 struct dsa_port *to_dp; 1253 int err; 1254 1255 if (!ds->ops->port_mirror_add) 1256 return -EOPNOTSUPP; 1257 1258 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1259 cls->common.extack)) 1260 return -EOPNOTSUPP; 1261 1262 act = &cls->rule->action.entries[0]; 1263 1264 if (!act->dev) 1265 return -EINVAL; 1266 1267 if (!dsa_slave_dev_check(act->dev)) 1268 return -EOPNOTSUPP; 1269 1270 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1271 if (!mall_tc_entry) 1272 return -ENOMEM; 1273 1274 mall_tc_entry->cookie = cls->cookie; 1275 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1276 mirror = &mall_tc_entry->mirror; 1277 1278 to_dp = dsa_slave_to_port(act->dev); 1279 1280 mirror->to_local_port = to_dp->index; 1281 mirror->ingress = ingress; 1282 1283 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1284 if (err) { 1285 kfree(mall_tc_entry); 1286 return err; 1287 } 1288 1289 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1290 1291 return err; 1292 } 1293 1294 static int 1295 dsa_slave_add_cls_matchall_police(struct net_device *dev, 1296 struct tc_cls_matchall_offload *cls, 1297 bool ingress) 1298 { 1299 struct netlink_ext_ack *extack = cls->common.extack; 1300 struct dsa_port *dp = dsa_slave_to_port(dev); 1301 struct dsa_slave_priv *p = netdev_priv(dev); 1302 struct dsa_mall_policer_tc_entry *policer; 1303 struct dsa_mall_tc_entry *mall_tc_entry; 1304 struct dsa_switch *ds = dp->ds; 1305 struct flow_action_entry *act; 1306 int err; 1307 1308 if (!ds->ops->port_policer_add) { 1309 NL_SET_ERR_MSG_MOD(extack, 1310 "Policing offload not implemented"); 1311 return -EOPNOTSUPP; 1312 } 1313 1314 if (!ingress) { 1315 NL_SET_ERR_MSG_MOD(extack, 1316 "Only supported on ingress qdisc"); 1317 return -EOPNOTSUPP; 1318 } 1319 1320 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1321 cls->common.extack)) 1322 return -EOPNOTSUPP; 1323 1324 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1325 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1326 NL_SET_ERR_MSG_MOD(extack, 1327 "Only one port policer allowed"); 1328 return -EEXIST; 1329 } 1330 } 1331 1332 act = &cls->rule->action.entries[0]; 1333 1334 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1335 if (!mall_tc_entry) 1336 return -ENOMEM; 1337 1338 mall_tc_entry->cookie = cls->cookie; 1339 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1340 policer = &mall_tc_entry->policer; 1341 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1342 policer->burst = act->police.burst; 1343 1344 err = ds->ops->port_policer_add(ds, dp->index, policer); 1345 if (err) { 1346 kfree(mall_tc_entry); 1347 return err; 1348 } 1349 1350 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1351 1352 return err; 1353 } 1354 1355 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1356 struct tc_cls_matchall_offload *cls, 1357 bool ingress) 1358 { 1359 int err = -EOPNOTSUPP; 1360 1361 if (cls->common.protocol == htons(ETH_P_ALL) && 1362 flow_offload_has_one_action(&cls->rule->action) && 1363 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1364 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1365 else if (flow_offload_has_one_action(&cls->rule->action) && 1366 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1367 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1368 1369 return err; 1370 } 1371 1372 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1373 struct tc_cls_matchall_offload *cls) 1374 { 1375 struct dsa_port *dp = dsa_slave_to_port(dev); 1376 struct dsa_mall_tc_entry *mall_tc_entry; 1377 struct dsa_switch *ds = dp->ds; 1378 1379 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1380 if (!mall_tc_entry) 1381 return; 1382 1383 list_del(&mall_tc_entry->list); 1384 1385 switch (mall_tc_entry->type) { 1386 case DSA_PORT_MALL_MIRROR: 1387 if (ds->ops->port_mirror_del) 1388 ds->ops->port_mirror_del(ds, dp->index, 1389 &mall_tc_entry->mirror); 1390 break; 1391 case DSA_PORT_MALL_POLICER: 1392 if (ds->ops->port_policer_del) 1393 ds->ops->port_policer_del(ds, dp->index); 1394 break; 1395 default: 1396 WARN_ON(1); 1397 } 1398 1399 kfree(mall_tc_entry); 1400 } 1401 1402 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1403 struct tc_cls_matchall_offload *cls, 1404 bool ingress) 1405 { 1406 if (cls->common.chain_index) 1407 return -EOPNOTSUPP; 1408 1409 switch (cls->command) { 1410 case TC_CLSMATCHALL_REPLACE: 1411 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1412 case TC_CLSMATCHALL_DESTROY: 1413 dsa_slave_del_cls_matchall(dev, cls); 1414 return 0; 1415 default: 1416 return -EOPNOTSUPP; 1417 } 1418 } 1419 1420 static int dsa_slave_add_cls_flower(struct net_device *dev, 1421 struct flow_cls_offload *cls, 1422 bool ingress) 1423 { 1424 struct dsa_port *dp = dsa_slave_to_port(dev); 1425 struct dsa_switch *ds = dp->ds; 1426 int port = dp->index; 1427 1428 if (!ds->ops->cls_flower_add) 1429 return -EOPNOTSUPP; 1430 1431 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1432 } 1433 1434 static int dsa_slave_del_cls_flower(struct net_device *dev, 1435 struct flow_cls_offload *cls, 1436 bool ingress) 1437 { 1438 struct dsa_port *dp = dsa_slave_to_port(dev); 1439 struct dsa_switch *ds = dp->ds; 1440 int port = dp->index; 1441 1442 if (!ds->ops->cls_flower_del) 1443 return -EOPNOTSUPP; 1444 1445 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1446 } 1447 1448 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1449 struct flow_cls_offload *cls, 1450 bool ingress) 1451 { 1452 struct dsa_port *dp = dsa_slave_to_port(dev); 1453 struct dsa_switch *ds = dp->ds; 1454 int port = dp->index; 1455 1456 if (!ds->ops->cls_flower_stats) 1457 return -EOPNOTSUPP; 1458 1459 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1460 } 1461 1462 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1463 struct flow_cls_offload *cls, 1464 bool ingress) 1465 { 1466 switch (cls->command) { 1467 case FLOW_CLS_REPLACE: 1468 return dsa_slave_add_cls_flower(dev, cls, ingress); 1469 case FLOW_CLS_DESTROY: 1470 return dsa_slave_del_cls_flower(dev, cls, ingress); 1471 case FLOW_CLS_STATS: 1472 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1473 default: 1474 return -EOPNOTSUPP; 1475 } 1476 } 1477 1478 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1479 void *cb_priv, bool ingress) 1480 { 1481 struct net_device *dev = cb_priv; 1482 1483 if (!tc_can_offload(dev)) 1484 return -EOPNOTSUPP; 1485 1486 switch (type) { 1487 case TC_SETUP_CLSMATCHALL: 1488 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1489 case TC_SETUP_CLSFLOWER: 1490 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1491 default: 1492 return -EOPNOTSUPP; 1493 } 1494 } 1495 1496 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1497 void *type_data, void *cb_priv) 1498 { 1499 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1500 } 1501 1502 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1503 void *type_data, void *cb_priv) 1504 { 1505 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1506 } 1507 1508 static LIST_HEAD(dsa_slave_block_cb_list); 1509 1510 static int dsa_slave_setup_tc_block(struct net_device *dev, 1511 struct flow_block_offload *f) 1512 { 1513 struct flow_block_cb *block_cb; 1514 flow_setup_cb_t *cb; 1515 1516 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1517 cb = dsa_slave_setup_tc_block_cb_ig; 1518 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1519 cb = dsa_slave_setup_tc_block_cb_eg; 1520 else 1521 return -EOPNOTSUPP; 1522 1523 f->driver_block_list = &dsa_slave_block_cb_list; 1524 1525 switch (f->command) { 1526 case FLOW_BLOCK_BIND: 1527 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1528 return -EBUSY; 1529 1530 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1531 if (IS_ERR(block_cb)) 1532 return PTR_ERR(block_cb); 1533 1534 flow_block_cb_add(block_cb, f); 1535 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1536 return 0; 1537 case FLOW_BLOCK_UNBIND: 1538 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1539 if (!block_cb) 1540 return -ENOENT; 1541 1542 flow_block_cb_remove(block_cb, f); 1543 list_del(&block_cb->driver_list); 1544 return 0; 1545 default: 1546 return -EOPNOTSUPP; 1547 } 1548 } 1549 1550 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port, 1551 void *type_data) 1552 { 1553 struct net_device *master = dsa_port_to_master(dsa_to_port(ds, port)); 1554 1555 if (!master->netdev_ops->ndo_setup_tc) 1556 return -EOPNOTSUPP; 1557 1558 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data); 1559 } 1560 1561 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1562 void *type_data) 1563 { 1564 struct dsa_port *dp = dsa_slave_to_port(dev); 1565 struct dsa_switch *ds = dp->ds; 1566 1567 switch (type) { 1568 case TC_SETUP_BLOCK: 1569 return dsa_slave_setup_tc_block(dev, type_data); 1570 case TC_SETUP_FT: 1571 return dsa_slave_setup_ft_block(ds, dp->index, type_data); 1572 default: 1573 break; 1574 } 1575 1576 if (!ds->ops->port_setup_tc) 1577 return -EOPNOTSUPP; 1578 1579 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1580 } 1581 1582 static int dsa_slave_get_rxnfc(struct net_device *dev, 1583 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1584 { 1585 struct dsa_port *dp = dsa_slave_to_port(dev); 1586 struct dsa_switch *ds = dp->ds; 1587 1588 if (!ds->ops->get_rxnfc) 1589 return -EOPNOTSUPP; 1590 1591 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1592 } 1593 1594 static int dsa_slave_set_rxnfc(struct net_device *dev, 1595 struct ethtool_rxnfc *nfc) 1596 { 1597 struct dsa_port *dp = dsa_slave_to_port(dev); 1598 struct dsa_switch *ds = dp->ds; 1599 1600 if (!ds->ops->set_rxnfc) 1601 return -EOPNOTSUPP; 1602 1603 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1604 } 1605 1606 static int dsa_slave_get_ts_info(struct net_device *dev, 1607 struct ethtool_ts_info *ts) 1608 { 1609 struct dsa_slave_priv *p = netdev_priv(dev); 1610 struct dsa_switch *ds = p->dp->ds; 1611 1612 if (!ds->ops->get_ts_info) 1613 return -EOPNOTSUPP; 1614 1615 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1616 } 1617 1618 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1619 u16 vid) 1620 { 1621 struct dsa_port *dp = dsa_slave_to_port(dev); 1622 struct switchdev_obj_port_vlan vlan = { 1623 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1624 .vid = vid, 1625 /* This API only allows programming tagged, non-PVID VIDs */ 1626 .flags = 0, 1627 }; 1628 struct netlink_ext_ack extack = {0}; 1629 int ret; 1630 1631 /* User port... */ 1632 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1633 if (ret) { 1634 if (extack._msg) 1635 netdev_err(dev, "%s\n", extack._msg); 1636 return ret; 1637 } 1638 1639 /* And CPU port... */ 1640 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1641 if (ret) { 1642 if (extack._msg) 1643 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1644 extack._msg); 1645 return ret; 1646 } 1647 1648 return 0; 1649 } 1650 1651 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1652 u16 vid) 1653 { 1654 struct dsa_port *dp = dsa_slave_to_port(dev); 1655 struct switchdev_obj_port_vlan vlan = { 1656 .vid = vid, 1657 /* This API only allows programming tagged, non-PVID VIDs */ 1658 .flags = 0, 1659 }; 1660 int err; 1661 1662 err = dsa_port_vlan_del(dp, &vlan); 1663 if (err) 1664 return err; 1665 1666 return dsa_port_host_vlan_del(dp, &vlan); 1667 } 1668 1669 static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg) 1670 { 1671 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1672 1673 return dsa_slave_vlan_rx_add_vid(arg, proto, vid); 1674 } 1675 1676 static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg) 1677 { 1678 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1679 1680 return dsa_slave_vlan_rx_kill_vid(arg, proto, vid); 1681 } 1682 1683 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1684 * filtering is enabled. The baseline is that only ports that offload a 1685 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1686 * but there are exceptions for quirky hardware. 1687 * 1688 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1689 * the same switch with other ports that offload a VLAN-aware bridge are also 1690 * inevitably VLAN-aware. 1691 * 1692 * To summarize, a DSA switch port offloads: 1693 * 1694 * - If standalone (this includes software bridge, software LAG): 1695 * - if ds->needs_standalone_vlan_filtering = true, OR if 1696 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1697 * this switch chip which have vlan_filtering=1) 1698 * - the 8021q upper VLANs 1699 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1700 * global, or it is, but no port is under a VLAN-aware bridge): 1701 * - no VLAN (any 8021q upper is a software VLAN) 1702 * 1703 * - If under a vlan_filtering=0 bridge which it offload: 1704 * - if ds->configure_vlan_while_not_filtering = true (default): 1705 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1706 * - else (deprecated): 1707 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1708 * enabled, so this behavior is broken and discouraged. 1709 * 1710 * - If under a vlan_filtering=1 bridge which it offload: 1711 * - the bridge VLANs 1712 * - the 8021q upper VLANs 1713 */ 1714 int dsa_slave_manage_vlan_filtering(struct net_device *slave, 1715 bool vlan_filtering) 1716 { 1717 int err; 1718 1719 if (vlan_filtering) { 1720 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1721 1722 err = vlan_for_each(slave, dsa_slave_restore_vlan, slave); 1723 if (err) { 1724 vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1725 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1726 return err; 1727 } 1728 } else { 1729 err = vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1730 if (err) 1731 return err; 1732 1733 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1734 } 1735 1736 return 0; 1737 } 1738 1739 struct dsa_hw_port { 1740 struct list_head list; 1741 struct net_device *dev; 1742 int old_mtu; 1743 }; 1744 1745 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1746 { 1747 const struct dsa_hw_port *p; 1748 int err; 1749 1750 list_for_each_entry(p, hw_port_list, list) { 1751 if (p->dev->mtu == mtu) 1752 continue; 1753 1754 err = dev_set_mtu(p->dev, mtu); 1755 if (err) 1756 goto rollback; 1757 } 1758 1759 return 0; 1760 1761 rollback: 1762 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1763 if (p->dev->mtu == p->old_mtu) 1764 continue; 1765 1766 if (dev_set_mtu(p->dev, p->old_mtu)) 1767 netdev_err(p->dev, "Failed to restore MTU\n"); 1768 } 1769 1770 return err; 1771 } 1772 1773 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1774 { 1775 struct dsa_hw_port *p, *n; 1776 1777 list_for_each_entry_safe(p, n, hw_port_list, list) 1778 kfree(p); 1779 } 1780 1781 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1782 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1783 { 1784 struct list_head hw_port_list; 1785 struct dsa_switch_tree *dst; 1786 int min_mtu = ETH_MAX_MTU; 1787 struct dsa_port *other_dp; 1788 int err; 1789 1790 if (!dp->ds->mtu_enforcement_ingress) 1791 return; 1792 1793 if (!dp->bridge) 1794 return; 1795 1796 INIT_LIST_HEAD(&hw_port_list); 1797 1798 /* Populate the list of ports that are part of the same bridge 1799 * as the newly added/modified port 1800 */ 1801 list_for_each_entry(dst, &dsa_tree_list, list) { 1802 list_for_each_entry(other_dp, &dst->ports, list) { 1803 struct dsa_hw_port *hw_port; 1804 struct net_device *slave; 1805 1806 if (other_dp->type != DSA_PORT_TYPE_USER) 1807 continue; 1808 1809 if (!dsa_port_bridge_same(dp, other_dp)) 1810 continue; 1811 1812 if (!other_dp->ds->mtu_enforcement_ingress) 1813 continue; 1814 1815 slave = other_dp->slave; 1816 1817 if (min_mtu > slave->mtu) 1818 min_mtu = slave->mtu; 1819 1820 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1821 if (!hw_port) 1822 goto out; 1823 1824 hw_port->dev = slave; 1825 hw_port->old_mtu = slave->mtu; 1826 1827 list_add(&hw_port->list, &hw_port_list); 1828 } 1829 } 1830 1831 /* Attempt to configure the entire hardware bridge to the newly added 1832 * interface's MTU first, regardless of whether the intention of the 1833 * user was to raise or lower it. 1834 */ 1835 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1836 if (!err) 1837 goto out; 1838 1839 /* Clearly that didn't work out so well, so just set the minimum MTU on 1840 * all hardware bridge ports now. If this fails too, then all ports will 1841 * still have their old MTU rolled back anyway. 1842 */ 1843 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1844 1845 out: 1846 dsa_hw_port_list_free(&hw_port_list); 1847 } 1848 1849 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1850 { 1851 struct net_device *master = dsa_slave_to_master(dev); 1852 struct dsa_port *dp = dsa_slave_to_port(dev); 1853 struct dsa_port *cpu_dp = dp->cpu_dp; 1854 struct dsa_switch *ds = dp->ds; 1855 struct dsa_port *other_dp; 1856 int largest_mtu = 0; 1857 int new_master_mtu; 1858 int old_master_mtu; 1859 int mtu_limit; 1860 int cpu_mtu; 1861 int err; 1862 1863 if (!ds->ops->port_change_mtu) 1864 return -EOPNOTSUPP; 1865 1866 dsa_tree_for_each_user_port(other_dp, ds->dst) { 1867 int slave_mtu; 1868 1869 /* During probe, this function will be called for each slave 1870 * device, while not all of them have been allocated. That's 1871 * ok, it doesn't change what the maximum is, so ignore it. 1872 */ 1873 if (!other_dp->slave) 1874 continue; 1875 1876 /* Pretend that we already applied the setting, which we 1877 * actually haven't (still haven't done all integrity checks) 1878 */ 1879 if (dp == other_dp) 1880 slave_mtu = new_mtu; 1881 else 1882 slave_mtu = other_dp->slave->mtu; 1883 1884 if (largest_mtu < slave_mtu) 1885 largest_mtu = slave_mtu; 1886 } 1887 1888 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1889 old_master_mtu = master->mtu; 1890 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops); 1891 if (new_master_mtu > mtu_limit) 1892 return -ERANGE; 1893 1894 /* If the master MTU isn't over limit, there's no need to check the CPU 1895 * MTU, since that surely isn't either. 1896 */ 1897 cpu_mtu = largest_mtu; 1898 1899 /* Start applying stuff */ 1900 if (new_master_mtu != old_master_mtu) { 1901 err = dev_set_mtu(master, new_master_mtu); 1902 if (err < 0) 1903 goto out_master_failed; 1904 1905 /* We only need to propagate the MTU of the CPU port to 1906 * upstream switches, so emit a notifier which updates them. 1907 */ 1908 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 1909 if (err) 1910 goto out_cpu_failed; 1911 } 1912 1913 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 1914 if (err) 1915 goto out_port_failed; 1916 1917 dev->mtu = new_mtu; 1918 1919 dsa_bridge_mtu_normalization(dp); 1920 1921 return 0; 1922 1923 out_port_failed: 1924 if (new_master_mtu != old_master_mtu) 1925 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1926 dsa_tag_protocol_overhead(cpu_dp->tag_ops)); 1927 out_cpu_failed: 1928 if (new_master_mtu != old_master_mtu) 1929 dev_set_mtu(master, old_master_mtu); 1930 out_master_failed: 1931 return err; 1932 } 1933 1934 static int __maybe_unused 1935 dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 1936 { 1937 struct dsa_port *dp = dsa_slave_to_port(dev); 1938 struct dsa_switch *ds = dp->ds; 1939 unsigned long mask, new_prio; 1940 int err, port = dp->index; 1941 1942 if (!ds->ops->port_set_default_prio) 1943 return -EOPNOTSUPP; 1944 1945 err = dcb_ieee_setapp(dev, app); 1946 if (err) 1947 return err; 1948 1949 mask = dcb_ieee_getapp_mask(dev, app); 1950 new_prio = __fls(mask); 1951 1952 err = ds->ops->port_set_default_prio(ds, port, new_prio); 1953 if (err) { 1954 dcb_ieee_delapp(dev, app); 1955 return err; 1956 } 1957 1958 return 0; 1959 } 1960 1961 static int __maybe_unused 1962 dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 1963 { 1964 struct dsa_port *dp = dsa_slave_to_port(dev); 1965 struct dsa_switch *ds = dp->ds; 1966 unsigned long mask, new_prio; 1967 int err, port = dp->index; 1968 u8 dscp = app->protocol; 1969 1970 if (!ds->ops->port_add_dscp_prio) 1971 return -EOPNOTSUPP; 1972 1973 if (dscp >= 64) { 1974 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 1975 dscp); 1976 return -EINVAL; 1977 } 1978 1979 err = dcb_ieee_setapp(dev, app); 1980 if (err) 1981 return err; 1982 1983 mask = dcb_ieee_getapp_mask(dev, app); 1984 new_prio = __fls(mask); 1985 1986 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 1987 if (err) { 1988 dcb_ieee_delapp(dev, app); 1989 return err; 1990 } 1991 1992 return 0; 1993 } 1994 1995 static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev, 1996 struct dcb_app *app) 1997 { 1998 switch (app->selector) { 1999 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2000 switch (app->protocol) { 2001 case 0: 2002 return dsa_slave_dcbnl_set_default_prio(dev, app); 2003 default: 2004 return -EOPNOTSUPP; 2005 } 2006 break; 2007 case IEEE_8021QAZ_APP_SEL_DSCP: 2008 return dsa_slave_dcbnl_add_dscp_prio(dev, app); 2009 default: 2010 return -EOPNOTSUPP; 2011 } 2012 } 2013 2014 static int __maybe_unused 2015 dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 2016 { 2017 struct dsa_port *dp = dsa_slave_to_port(dev); 2018 struct dsa_switch *ds = dp->ds; 2019 unsigned long mask, new_prio; 2020 int err, port = dp->index; 2021 2022 if (!ds->ops->port_set_default_prio) 2023 return -EOPNOTSUPP; 2024 2025 err = dcb_ieee_delapp(dev, app); 2026 if (err) 2027 return err; 2028 2029 mask = dcb_ieee_getapp_mask(dev, app); 2030 new_prio = mask ? __fls(mask) : 0; 2031 2032 err = ds->ops->port_set_default_prio(ds, port, new_prio); 2033 if (err) { 2034 dcb_ieee_setapp(dev, app); 2035 return err; 2036 } 2037 2038 return 0; 2039 } 2040 2041 static int __maybe_unused 2042 dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 2043 { 2044 struct dsa_port *dp = dsa_slave_to_port(dev); 2045 struct dsa_switch *ds = dp->ds; 2046 int err, port = dp->index; 2047 u8 dscp = app->protocol; 2048 2049 if (!ds->ops->port_del_dscp_prio) 2050 return -EOPNOTSUPP; 2051 2052 err = dcb_ieee_delapp(dev, app); 2053 if (err) 2054 return err; 2055 2056 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2057 if (err) { 2058 dcb_ieee_setapp(dev, app); 2059 return err; 2060 } 2061 2062 return 0; 2063 } 2064 2065 static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev, 2066 struct dcb_app *app) 2067 { 2068 switch (app->selector) { 2069 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2070 switch (app->protocol) { 2071 case 0: 2072 return dsa_slave_dcbnl_del_default_prio(dev, app); 2073 default: 2074 return -EOPNOTSUPP; 2075 } 2076 break; 2077 case IEEE_8021QAZ_APP_SEL_DSCP: 2078 return dsa_slave_dcbnl_del_dscp_prio(dev, app); 2079 default: 2080 return -EOPNOTSUPP; 2081 } 2082 } 2083 2084 /* Pre-populate the DCB application priority table with the priorities 2085 * configured during switch setup, which we read from hardware here. 2086 */ 2087 static int dsa_slave_dcbnl_init(struct net_device *dev) 2088 { 2089 struct dsa_port *dp = dsa_slave_to_port(dev); 2090 struct dsa_switch *ds = dp->ds; 2091 int port = dp->index; 2092 int err; 2093 2094 if (ds->ops->port_get_default_prio) { 2095 int prio = ds->ops->port_get_default_prio(ds, port); 2096 struct dcb_app app = { 2097 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2098 .protocol = 0, 2099 .priority = prio, 2100 }; 2101 2102 if (prio < 0) 2103 return prio; 2104 2105 err = dcb_ieee_setapp(dev, &app); 2106 if (err) 2107 return err; 2108 } 2109 2110 if (ds->ops->port_get_dscp_prio) { 2111 int protocol; 2112 2113 for (protocol = 0; protocol < 64; protocol++) { 2114 struct dcb_app app = { 2115 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2116 .protocol = protocol, 2117 }; 2118 int prio; 2119 2120 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2121 if (prio == -EOPNOTSUPP) 2122 continue; 2123 if (prio < 0) 2124 return prio; 2125 2126 app.priority = prio; 2127 2128 err = dcb_ieee_setapp(dev, &app); 2129 if (err) 2130 return err; 2131 } 2132 } 2133 2134 return 0; 2135 } 2136 2137 static const struct ethtool_ops dsa_slave_ethtool_ops = { 2138 .get_drvinfo = dsa_slave_get_drvinfo, 2139 .get_regs_len = dsa_slave_get_regs_len, 2140 .get_regs = dsa_slave_get_regs, 2141 .nway_reset = dsa_slave_nway_reset, 2142 .get_link = ethtool_op_get_link, 2143 .get_eeprom_len = dsa_slave_get_eeprom_len, 2144 .get_eeprom = dsa_slave_get_eeprom, 2145 .set_eeprom = dsa_slave_set_eeprom, 2146 .get_strings = dsa_slave_get_strings, 2147 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 2148 .get_sset_count = dsa_slave_get_sset_count, 2149 .get_eth_phy_stats = dsa_slave_get_eth_phy_stats, 2150 .get_eth_mac_stats = dsa_slave_get_eth_mac_stats, 2151 .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats, 2152 .get_rmon_stats = dsa_slave_get_rmon_stats, 2153 .set_wol = dsa_slave_set_wol, 2154 .get_wol = dsa_slave_get_wol, 2155 .set_eee = dsa_slave_set_eee, 2156 .get_eee = dsa_slave_get_eee, 2157 .get_link_ksettings = dsa_slave_get_link_ksettings, 2158 .set_link_ksettings = dsa_slave_set_link_ksettings, 2159 .get_pause_stats = dsa_slave_get_pause_stats, 2160 .get_pauseparam = dsa_slave_get_pauseparam, 2161 .set_pauseparam = dsa_slave_set_pauseparam, 2162 .get_rxnfc = dsa_slave_get_rxnfc, 2163 .set_rxnfc = dsa_slave_set_rxnfc, 2164 .get_ts_info = dsa_slave_get_ts_info, 2165 .self_test = dsa_slave_net_selftest, 2166 }; 2167 2168 static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = { 2169 .ieee_setapp = dsa_slave_dcbnl_ieee_setapp, 2170 .ieee_delapp = dsa_slave_dcbnl_ieee_delapp, 2171 }; 2172 2173 static void dsa_slave_get_stats64(struct net_device *dev, 2174 struct rtnl_link_stats64 *s) 2175 { 2176 struct dsa_port *dp = dsa_slave_to_port(dev); 2177 struct dsa_switch *ds = dp->ds; 2178 2179 if (ds->ops->get_stats64) 2180 ds->ops->get_stats64(ds, dp->index, s); 2181 else 2182 dev_get_tstats64(dev, s); 2183 } 2184 2185 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, 2186 struct net_device_path *path) 2187 { 2188 struct dsa_port *dp = dsa_slave_to_port(ctx->dev); 2189 struct net_device *master = dsa_port_to_master(dp); 2190 struct dsa_port *cpu_dp = dp->cpu_dp; 2191 2192 path->dev = ctx->dev; 2193 path->type = DEV_PATH_DSA; 2194 path->dsa.proto = cpu_dp->tag_ops->proto; 2195 path->dsa.port = dp->index; 2196 ctx->dev = master; 2197 2198 return 0; 2199 } 2200 2201 static const struct net_device_ops dsa_slave_netdev_ops = { 2202 .ndo_open = dsa_slave_open, 2203 .ndo_stop = dsa_slave_close, 2204 .ndo_start_xmit = dsa_slave_xmit, 2205 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 2206 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 2207 .ndo_set_mac_address = dsa_slave_set_mac_address, 2208 .ndo_fdb_dump = dsa_slave_fdb_dump, 2209 .ndo_eth_ioctl = dsa_slave_ioctl, 2210 .ndo_get_iflink = dsa_slave_get_iflink, 2211 #ifdef CONFIG_NET_POLL_CONTROLLER 2212 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 2213 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 2214 .ndo_poll_controller = dsa_slave_poll_controller, 2215 #endif 2216 .ndo_setup_tc = dsa_slave_setup_tc, 2217 .ndo_get_stats64 = dsa_slave_get_stats64, 2218 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 2219 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 2220 .ndo_change_mtu = dsa_slave_change_mtu, 2221 .ndo_fill_forward_path = dsa_slave_fill_forward_path, 2222 }; 2223 2224 static struct device_type dsa_type = { 2225 .name = "dsa", 2226 }; 2227 2228 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2229 { 2230 const struct dsa_port *dp = dsa_to_port(ds, port); 2231 2232 if (dp->pl) 2233 phylink_mac_change(dp->pl, up); 2234 } 2235 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2236 2237 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 2238 struct phylink_link_state *state) 2239 { 2240 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 2241 struct dsa_switch *ds = dp->ds; 2242 2243 /* No need to check that this operation is valid, the callback would 2244 * not be called if it was not. 2245 */ 2246 ds->ops->phylink_fixed_state(ds, dp->index, state); 2247 } 2248 2249 /* slave device setup *******************************************************/ 2250 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr, 2251 u32 flags) 2252 { 2253 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2254 struct dsa_switch *ds = dp->ds; 2255 2256 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 2257 if (!slave_dev->phydev) { 2258 netdev_err(slave_dev, "no phy at %d\n", addr); 2259 return -ENODEV; 2260 } 2261 2262 slave_dev->phydev->dev_flags |= flags; 2263 2264 return phylink_connect_phy(dp->pl, slave_dev->phydev); 2265 } 2266 2267 static int dsa_slave_phy_setup(struct net_device *slave_dev) 2268 { 2269 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2270 struct device_node *port_dn = dp->dn; 2271 struct dsa_switch *ds = dp->ds; 2272 u32 phy_flags = 0; 2273 int ret; 2274 2275 dp->pl_config.dev = &slave_dev->dev; 2276 dp->pl_config.type = PHYLINK_NETDEV; 2277 2278 /* The get_fixed_state callback takes precedence over polling the 2279 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2280 * this if the switch provides such a callback. 2281 */ 2282 if (ds->ops->phylink_fixed_state) { 2283 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 2284 dp->pl_config.poll_fixed_state = true; 2285 } 2286 2287 ret = dsa_port_phylink_create(dp); 2288 if (ret) 2289 return ret; 2290 2291 if (ds->ops->get_phy_flags) 2292 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2293 2294 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2295 if (ret == -ENODEV && ds->slave_mii_bus) { 2296 /* We could not connect to a designated PHY or SFP, so try to 2297 * use the switch internal MDIO bus instead 2298 */ 2299 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags); 2300 } 2301 if (ret) { 2302 netdev_err(slave_dev, "failed to connect to PHY: %pe\n", 2303 ERR_PTR(ret)); 2304 dsa_port_phylink_destroy(dp); 2305 } 2306 2307 return ret; 2308 } 2309 2310 void dsa_slave_setup_tagger(struct net_device *slave) 2311 { 2312 struct dsa_port *dp = dsa_slave_to_port(slave); 2313 struct net_device *master = dsa_port_to_master(dp); 2314 struct dsa_slave_priv *p = netdev_priv(slave); 2315 const struct dsa_port *cpu_dp = dp->cpu_dp; 2316 const struct dsa_switch *ds = dp->ds; 2317 2318 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2319 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2320 /* Try to save one extra realloc later in the TX path (in the master) 2321 * by also inheriting the master's needed headroom and tailroom. 2322 * The 8021q driver also does this. 2323 */ 2324 slave->needed_headroom += master->needed_headroom; 2325 slave->needed_tailroom += master->needed_tailroom; 2326 2327 p->xmit = cpu_dp->tag_ops->xmit; 2328 2329 slave->features = master->vlan_features | NETIF_F_HW_TC; 2330 slave->hw_features |= NETIF_F_HW_TC; 2331 slave->features |= NETIF_F_LLTX; 2332 if (slave->needed_tailroom) 2333 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2334 if (ds->needs_standalone_vlan_filtering) 2335 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2336 } 2337 2338 int dsa_slave_suspend(struct net_device *slave_dev) 2339 { 2340 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2341 2342 if (!netif_running(slave_dev)) 2343 return 0; 2344 2345 netif_device_detach(slave_dev); 2346 2347 rtnl_lock(); 2348 phylink_stop(dp->pl); 2349 rtnl_unlock(); 2350 2351 return 0; 2352 } 2353 2354 int dsa_slave_resume(struct net_device *slave_dev) 2355 { 2356 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2357 2358 if (!netif_running(slave_dev)) 2359 return 0; 2360 2361 netif_device_attach(slave_dev); 2362 2363 rtnl_lock(); 2364 phylink_start(dp->pl); 2365 rtnl_unlock(); 2366 2367 return 0; 2368 } 2369 2370 int dsa_slave_create(struct dsa_port *port) 2371 { 2372 struct net_device *master = dsa_port_to_master(port); 2373 struct dsa_switch *ds = port->ds; 2374 struct net_device *slave_dev; 2375 struct dsa_slave_priv *p; 2376 const char *name; 2377 int assign_type; 2378 int ret; 2379 2380 if (!ds->num_tx_queues) 2381 ds->num_tx_queues = 1; 2382 2383 if (port->name) { 2384 name = port->name; 2385 assign_type = NET_NAME_PREDICTABLE; 2386 } else { 2387 name = "eth%d"; 2388 assign_type = NET_NAME_ENUM; 2389 } 2390 2391 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 2392 assign_type, ether_setup, 2393 ds->num_tx_queues, 1); 2394 if (slave_dev == NULL) 2395 return -ENOMEM; 2396 2397 slave_dev->rtnl_link_ops = &dsa_link_ops; 2398 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 2399 #if IS_ENABLED(CONFIG_DCB) 2400 slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops; 2401 #endif 2402 if (!is_zero_ether_addr(port->mac)) 2403 eth_hw_addr_set(slave_dev, port->mac); 2404 else 2405 eth_hw_addr_inherit(slave_dev, master); 2406 slave_dev->priv_flags |= IFF_NO_QUEUE; 2407 if (dsa_switch_supports_uc_filtering(ds)) 2408 slave_dev->priv_flags |= IFF_UNICAST_FLT; 2409 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 2410 if (ds->ops->port_max_mtu) 2411 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2412 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 2413 2414 SET_NETDEV_DEV(slave_dev, port->ds->dev); 2415 SET_NETDEV_DEVLINK_PORT(slave_dev, &port->devlink_port); 2416 slave_dev->dev.of_node = port->dn; 2417 slave_dev->vlan_features = master->vlan_features; 2418 2419 p = netdev_priv(slave_dev); 2420 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2421 if (!slave_dev->tstats) { 2422 free_netdev(slave_dev); 2423 return -ENOMEM; 2424 } 2425 2426 ret = gro_cells_init(&p->gcells, slave_dev); 2427 if (ret) 2428 goto out_free; 2429 2430 p->dp = port; 2431 INIT_LIST_HEAD(&p->mall_tc_list); 2432 port->slave = slave_dev; 2433 dsa_slave_setup_tagger(slave_dev); 2434 2435 netif_carrier_off(slave_dev); 2436 2437 ret = dsa_slave_phy_setup(slave_dev); 2438 if (ret) { 2439 netdev_err(slave_dev, 2440 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2441 ret, ds->dst->index, ds->index, port->index); 2442 goto out_gcells; 2443 } 2444 2445 rtnl_lock(); 2446 2447 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 2448 if (ret && ret != -EOPNOTSUPP) 2449 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2450 ret, ETH_DATA_LEN, port->index); 2451 2452 ret = register_netdevice(slave_dev); 2453 if (ret) { 2454 netdev_err(master, "error %d registering interface %s\n", 2455 ret, slave_dev->name); 2456 rtnl_unlock(); 2457 goto out_phy; 2458 } 2459 2460 if (IS_ENABLED(CONFIG_DCB)) { 2461 ret = dsa_slave_dcbnl_init(slave_dev); 2462 if (ret) { 2463 netdev_err(slave_dev, 2464 "failed to initialize DCB: %pe\n", 2465 ERR_PTR(ret)); 2466 rtnl_unlock(); 2467 goto out_unregister; 2468 } 2469 } 2470 2471 ret = netdev_upper_dev_link(master, slave_dev, NULL); 2472 2473 rtnl_unlock(); 2474 2475 if (ret) 2476 goto out_unregister; 2477 2478 return 0; 2479 2480 out_unregister: 2481 unregister_netdev(slave_dev); 2482 out_phy: 2483 rtnl_lock(); 2484 phylink_disconnect_phy(p->dp->pl); 2485 rtnl_unlock(); 2486 dsa_port_phylink_destroy(p->dp); 2487 out_gcells: 2488 gro_cells_destroy(&p->gcells); 2489 out_free: 2490 free_percpu(slave_dev->tstats); 2491 free_netdev(slave_dev); 2492 port->slave = NULL; 2493 return ret; 2494 } 2495 2496 void dsa_slave_destroy(struct net_device *slave_dev) 2497 { 2498 struct net_device *master = dsa_slave_to_master(slave_dev); 2499 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2500 struct dsa_slave_priv *p = netdev_priv(slave_dev); 2501 2502 netif_carrier_off(slave_dev); 2503 rtnl_lock(); 2504 netdev_upper_dev_unlink(master, slave_dev); 2505 unregister_netdevice(slave_dev); 2506 phylink_disconnect_phy(dp->pl); 2507 rtnl_unlock(); 2508 2509 dsa_port_phylink_destroy(dp); 2510 gro_cells_destroy(&p->gcells); 2511 free_percpu(slave_dev->tstats); 2512 free_netdev(slave_dev); 2513 } 2514 2515 int dsa_slave_change_master(struct net_device *dev, struct net_device *master, 2516 struct netlink_ext_ack *extack) 2517 { 2518 struct net_device *old_master = dsa_slave_to_master(dev); 2519 struct dsa_port *dp = dsa_slave_to_port(dev); 2520 struct dsa_switch *ds = dp->ds; 2521 struct net_device *upper; 2522 struct list_head *iter; 2523 int err; 2524 2525 if (master == old_master) 2526 return 0; 2527 2528 if (!ds->ops->port_change_master) { 2529 NL_SET_ERR_MSG_MOD(extack, 2530 "Driver does not support changing DSA master"); 2531 return -EOPNOTSUPP; 2532 } 2533 2534 if (!netdev_uses_dsa(master)) { 2535 NL_SET_ERR_MSG_MOD(extack, 2536 "Interface not eligible as DSA master"); 2537 return -EOPNOTSUPP; 2538 } 2539 2540 netdev_for_each_upper_dev_rcu(master, upper, iter) { 2541 if (dsa_slave_dev_check(upper)) 2542 continue; 2543 if (netif_is_bridge_master(upper)) 2544 continue; 2545 NL_SET_ERR_MSG_MOD(extack, "Cannot join master with unknown uppers"); 2546 return -EOPNOTSUPP; 2547 } 2548 2549 /* Since we allow live-changing the DSA master, plus we auto-open the 2550 * DSA master when the user port opens => we need to ensure that the 2551 * new DSA master is open too. 2552 */ 2553 if (dev->flags & IFF_UP) { 2554 err = dev_open(master, extack); 2555 if (err) 2556 return err; 2557 } 2558 2559 netdev_upper_dev_unlink(old_master, dev); 2560 2561 err = netdev_upper_dev_link(master, dev, extack); 2562 if (err) 2563 goto out_revert_old_master_unlink; 2564 2565 err = dsa_port_change_master(dp, master, extack); 2566 if (err) 2567 goto out_revert_master_link; 2568 2569 /* Update the MTU of the new CPU port through cross-chip notifiers */ 2570 err = dsa_slave_change_mtu(dev, dev->mtu); 2571 if (err && err != -EOPNOTSUPP) { 2572 netdev_warn(dev, 2573 "nonfatal error updating MTU with new master: %pe\n", 2574 ERR_PTR(err)); 2575 } 2576 2577 /* If the port doesn't have its own MAC address and relies on the DSA 2578 * master's one, inherit it again from the new DSA master. 2579 */ 2580 if (is_zero_ether_addr(dp->mac)) 2581 eth_hw_addr_inherit(dev, master); 2582 2583 return 0; 2584 2585 out_revert_master_link: 2586 netdev_upper_dev_unlink(master, dev); 2587 out_revert_old_master_unlink: 2588 netdev_upper_dev_link(old_master, dev, NULL); 2589 return err; 2590 } 2591 2592 bool dsa_slave_dev_check(const struct net_device *dev) 2593 { 2594 return dev->netdev_ops == &dsa_slave_netdev_ops; 2595 } 2596 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 2597 2598 static int dsa_slave_changeupper(struct net_device *dev, 2599 struct netdev_notifier_changeupper_info *info) 2600 { 2601 struct dsa_port *dp = dsa_slave_to_port(dev); 2602 struct netlink_ext_ack *extack; 2603 int err = NOTIFY_DONE; 2604 2605 if (!dsa_slave_dev_check(dev)) 2606 return err; 2607 2608 extack = netdev_notifier_info_to_extack(&info->info); 2609 2610 if (netif_is_bridge_master(info->upper_dev)) { 2611 if (info->linking) { 2612 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2613 if (!err) 2614 dsa_bridge_mtu_normalization(dp); 2615 if (err == -EOPNOTSUPP) { 2616 if (extack && !extack->_msg) 2617 NL_SET_ERR_MSG_MOD(extack, 2618 "Offloading not supported"); 2619 err = 0; 2620 } 2621 err = notifier_from_errno(err); 2622 } else { 2623 dsa_port_bridge_leave(dp, info->upper_dev); 2624 err = NOTIFY_OK; 2625 } 2626 } else if (netif_is_lag_master(info->upper_dev)) { 2627 if (info->linking) { 2628 err = dsa_port_lag_join(dp, info->upper_dev, 2629 info->upper_info, extack); 2630 if (err == -EOPNOTSUPP) { 2631 NL_SET_ERR_MSG_MOD(info->info.extack, 2632 "Offloading not supported"); 2633 err = 0; 2634 } 2635 err = notifier_from_errno(err); 2636 } else { 2637 dsa_port_lag_leave(dp, info->upper_dev); 2638 err = NOTIFY_OK; 2639 } 2640 } else if (is_hsr_master(info->upper_dev)) { 2641 if (info->linking) { 2642 err = dsa_port_hsr_join(dp, info->upper_dev); 2643 if (err == -EOPNOTSUPP) { 2644 NL_SET_ERR_MSG_MOD(info->info.extack, 2645 "Offloading not supported"); 2646 err = 0; 2647 } 2648 err = notifier_from_errno(err); 2649 } else { 2650 dsa_port_hsr_leave(dp, info->upper_dev); 2651 err = NOTIFY_OK; 2652 } 2653 } 2654 2655 return err; 2656 } 2657 2658 static int dsa_slave_prechangeupper(struct net_device *dev, 2659 struct netdev_notifier_changeupper_info *info) 2660 { 2661 struct dsa_port *dp = dsa_slave_to_port(dev); 2662 2663 if (!dsa_slave_dev_check(dev)) 2664 return NOTIFY_DONE; 2665 2666 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2667 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2668 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2669 dsa_port_pre_lag_leave(dp, info->upper_dev); 2670 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be 2671 * meaningfully enslaved to a bridge yet 2672 */ 2673 2674 return NOTIFY_DONE; 2675 } 2676 2677 static int 2678 dsa_slave_lag_changeupper(struct net_device *dev, 2679 struct netdev_notifier_changeupper_info *info) 2680 { 2681 struct net_device *lower; 2682 struct list_head *iter; 2683 int err = NOTIFY_DONE; 2684 struct dsa_port *dp; 2685 2686 if (!netif_is_lag_master(dev)) 2687 return err; 2688 2689 netdev_for_each_lower_dev(dev, lower, iter) { 2690 if (!dsa_slave_dev_check(lower)) 2691 continue; 2692 2693 dp = dsa_slave_to_port(lower); 2694 if (!dp->lag) 2695 /* Software LAG */ 2696 continue; 2697 2698 err = dsa_slave_changeupper(lower, info); 2699 if (notifier_to_errno(err)) 2700 break; 2701 } 2702 2703 return err; 2704 } 2705 2706 /* Same as dsa_slave_lag_changeupper() except that it calls 2707 * dsa_slave_prechangeupper() 2708 */ 2709 static int 2710 dsa_slave_lag_prechangeupper(struct net_device *dev, 2711 struct netdev_notifier_changeupper_info *info) 2712 { 2713 struct net_device *lower; 2714 struct list_head *iter; 2715 int err = NOTIFY_DONE; 2716 struct dsa_port *dp; 2717 2718 if (!netif_is_lag_master(dev)) 2719 return err; 2720 2721 netdev_for_each_lower_dev(dev, lower, iter) { 2722 if (!dsa_slave_dev_check(lower)) 2723 continue; 2724 2725 dp = dsa_slave_to_port(lower); 2726 if (!dp->lag) 2727 /* Software LAG */ 2728 continue; 2729 2730 err = dsa_slave_prechangeupper(lower, info); 2731 if (notifier_to_errno(err)) 2732 break; 2733 } 2734 2735 return err; 2736 } 2737 2738 static int 2739 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 2740 struct netdev_notifier_changeupper_info *info) 2741 { 2742 struct netlink_ext_ack *ext_ack; 2743 struct net_device *slave, *br; 2744 struct dsa_port *dp; 2745 2746 ext_ack = netdev_notifier_info_to_extack(&info->info); 2747 2748 if (!is_vlan_dev(dev)) 2749 return NOTIFY_DONE; 2750 2751 slave = vlan_dev_real_dev(dev); 2752 if (!dsa_slave_dev_check(slave)) 2753 return NOTIFY_DONE; 2754 2755 dp = dsa_slave_to_port(slave); 2756 br = dsa_port_bridge_dev_get(dp); 2757 if (!br) 2758 return NOTIFY_DONE; 2759 2760 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 2761 if (br_vlan_enabled(br) && 2762 netif_is_bridge_master(info->upper_dev) && info->linking) { 2763 NL_SET_ERR_MSG_MOD(ext_ack, 2764 "Cannot enslave VLAN device into VLAN aware bridge"); 2765 return notifier_from_errno(-EINVAL); 2766 } 2767 2768 return NOTIFY_DONE; 2769 } 2770 2771 static int 2772 dsa_slave_check_8021q_upper(struct net_device *dev, 2773 struct netdev_notifier_changeupper_info *info) 2774 { 2775 struct dsa_port *dp = dsa_slave_to_port(dev); 2776 struct net_device *br = dsa_port_bridge_dev_get(dp); 2777 struct bridge_vlan_info br_info; 2778 struct netlink_ext_ack *extack; 2779 int err = NOTIFY_DONE; 2780 u16 vid; 2781 2782 if (!br || !br_vlan_enabled(br)) 2783 return NOTIFY_DONE; 2784 2785 extack = netdev_notifier_info_to_extack(&info->info); 2786 vid = vlan_dev_vlan_id(info->upper_dev); 2787 2788 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2789 * device, respectively the VID is not found, returning 2790 * 0 means success, which is a failure for us here. 2791 */ 2792 err = br_vlan_get_info(br, vid, &br_info); 2793 if (err == 0) { 2794 NL_SET_ERR_MSG_MOD(extack, 2795 "This VLAN is already configured by the bridge"); 2796 return notifier_from_errno(-EBUSY); 2797 } 2798 2799 return NOTIFY_DONE; 2800 } 2801 2802 static int 2803 dsa_slave_prechangeupper_sanity_check(struct net_device *dev, 2804 struct netdev_notifier_changeupper_info *info) 2805 { 2806 struct dsa_switch *ds; 2807 struct dsa_port *dp; 2808 int err; 2809 2810 if (!dsa_slave_dev_check(dev)) 2811 return dsa_prevent_bridging_8021q_upper(dev, info); 2812 2813 dp = dsa_slave_to_port(dev); 2814 ds = dp->ds; 2815 2816 if (ds->ops->port_prechangeupper) { 2817 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2818 if (err) 2819 return notifier_from_errno(err); 2820 } 2821 2822 if (is_vlan_dev(info->upper_dev)) 2823 return dsa_slave_check_8021q_upper(dev, info); 2824 2825 return NOTIFY_DONE; 2826 } 2827 2828 /* To be eligible as a DSA master, a LAG must have all lower interfaces be 2829 * eligible DSA masters. Additionally, all LAG slaves must be DSA masters of 2830 * switches in the same switch tree. 2831 */ 2832 static int dsa_lag_master_validate(struct net_device *lag_dev, 2833 struct netlink_ext_ack *extack) 2834 { 2835 struct net_device *lower1, *lower2; 2836 struct list_head *iter1, *iter2; 2837 2838 netdev_for_each_lower_dev(lag_dev, lower1, iter1) { 2839 netdev_for_each_lower_dev(lag_dev, lower2, iter2) { 2840 if (!netdev_uses_dsa(lower1) || 2841 !netdev_uses_dsa(lower2)) { 2842 NL_SET_ERR_MSG_MOD(extack, 2843 "All LAG ports must be eligible as DSA masters"); 2844 return notifier_from_errno(-EINVAL); 2845 } 2846 2847 if (lower1 == lower2) 2848 continue; 2849 2850 if (!dsa_port_tree_same(lower1->dsa_ptr, 2851 lower2->dsa_ptr)) { 2852 NL_SET_ERR_MSG_MOD(extack, 2853 "LAG contains DSA masters of disjoint switch trees"); 2854 return notifier_from_errno(-EINVAL); 2855 } 2856 } 2857 } 2858 2859 return NOTIFY_DONE; 2860 } 2861 2862 static int 2863 dsa_master_prechangeupper_sanity_check(struct net_device *master, 2864 struct netdev_notifier_changeupper_info *info) 2865 { 2866 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2867 2868 if (!netdev_uses_dsa(master)) 2869 return NOTIFY_DONE; 2870 2871 if (!info->linking) 2872 return NOTIFY_DONE; 2873 2874 /* Allow DSA switch uppers */ 2875 if (dsa_slave_dev_check(info->upper_dev)) 2876 return NOTIFY_DONE; 2877 2878 /* Allow bridge uppers of DSA masters, subject to further 2879 * restrictions in dsa_bridge_prechangelower_sanity_check() 2880 */ 2881 if (netif_is_bridge_master(info->upper_dev)) 2882 return NOTIFY_DONE; 2883 2884 /* Allow LAG uppers, subject to further restrictions in 2885 * dsa_lag_master_prechangelower_sanity_check() 2886 */ 2887 if (netif_is_lag_master(info->upper_dev)) 2888 return dsa_lag_master_validate(info->upper_dev, extack); 2889 2890 NL_SET_ERR_MSG_MOD(extack, 2891 "DSA master cannot join unknown upper interfaces"); 2892 return notifier_from_errno(-EBUSY); 2893 } 2894 2895 static int 2896 dsa_lag_master_prechangelower_sanity_check(struct net_device *dev, 2897 struct netdev_notifier_changeupper_info *info) 2898 { 2899 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(&info->info); 2900 struct net_device *lag_dev = info->upper_dev; 2901 struct net_device *lower; 2902 struct list_head *iter; 2903 2904 if (!netdev_uses_dsa(lag_dev) || !netif_is_lag_master(lag_dev)) 2905 return NOTIFY_DONE; 2906 2907 if (!info->linking) 2908 return NOTIFY_DONE; 2909 2910 if (!netdev_uses_dsa(dev)) { 2911 NL_SET_ERR_MSG(extack, 2912 "Only DSA masters can join a LAG DSA master"); 2913 return notifier_from_errno(-EINVAL); 2914 } 2915 2916 netdev_for_each_lower_dev(lag_dev, lower, iter) { 2917 if (!dsa_port_tree_same(dev->dsa_ptr, lower->dsa_ptr)) { 2918 NL_SET_ERR_MSG(extack, 2919 "Interface is DSA master for a different switch tree than this LAG"); 2920 return notifier_from_errno(-EINVAL); 2921 } 2922 2923 break; 2924 } 2925 2926 return NOTIFY_DONE; 2927 } 2928 2929 /* Don't allow bridging of DSA masters, since the bridge layer rx_handler 2930 * prevents the DSA fake ethertype handler to be invoked, so we don't get the 2931 * chance to strip off and parse the DSA switch tag protocol header (the bridge 2932 * layer just returns RX_HANDLER_CONSUMED, stopping RX processing for these 2933 * frames). 2934 * The only case where that would not be an issue is when bridging can already 2935 * be offloaded, such as when the DSA master is itself a DSA or plain switchdev 2936 * port, and is bridged only with other ports from the same hardware device. 2937 */ 2938 static int 2939 dsa_bridge_prechangelower_sanity_check(struct net_device *new_lower, 2940 struct netdev_notifier_changeupper_info *info) 2941 { 2942 struct net_device *br = info->upper_dev; 2943 struct netlink_ext_ack *extack; 2944 struct net_device *lower; 2945 struct list_head *iter; 2946 2947 if (!netif_is_bridge_master(br)) 2948 return NOTIFY_DONE; 2949 2950 if (!info->linking) 2951 return NOTIFY_DONE; 2952 2953 extack = netdev_notifier_info_to_extack(&info->info); 2954 2955 netdev_for_each_lower_dev(br, lower, iter) { 2956 if (!netdev_uses_dsa(new_lower) && !netdev_uses_dsa(lower)) 2957 continue; 2958 2959 if (!netdev_port_same_parent_id(lower, new_lower)) { 2960 NL_SET_ERR_MSG(extack, 2961 "Cannot do software bridging with a DSA master"); 2962 return notifier_from_errno(-EINVAL); 2963 } 2964 } 2965 2966 return NOTIFY_DONE; 2967 } 2968 2969 static void dsa_tree_migrate_ports_from_lag_master(struct dsa_switch_tree *dst, 2970 struct net_device *lag_dev) 2971 { 2972 struct net_device *new_master = dsa_tree_find_first_master(dst); 2973 struct dsa_port *dp; 2974 int err; 2975 2976 dsa_tree_for_each_user_port(dp, dst) { 2977 if (dsa_port_to_master(dp) != lag_dev) 2978 continue; 2979 2980 err = dsa_slave_change_master(dp->slave, new_master, NULL); 2981 if (err) { 2982 netdev_err(dp->slave, 2983 "failed to restore master to %s: %pe\n", 2984 new_master->name, ERR_PTR(err)); 2985 } 2986 } 2987 } 2988 2989 static int dsa_master_lag_join(struct net_device *master, 2990 struct net_device *lag_dev, 2991 struct netdev_lag_upper_info *uinfo, 2992 struct netlink_ext_ack *extack) 2993 { 2994 struct dsa_port *cpu_dp = master->dsa_ptr; 2995 struct dsa_switch_tree *dst = cpu_dp->dst; 2996 struct dsa_port *dp; 2997 int err; 2998 2999 err = dsa_master_lag_setup(lag_dev, cpu_dp, uinfo, extack); 3000 if (err) 3001 return err; 3002 3003 dsa_tree_for_each_user_port(dp, dst) { 3004 if (dsa_port_to_master(dp) != master) 3005 continue; 3006 3007 err = dsa_slave_change_master(dp->slave, lag_dev, extack); 3008 if (err) 3009 goto restore; 3010 } 3011 3012 return 0; 3013 3014 restore: 3015 dsa_tree_for_each_user_port_continue_reverse(dp, dst) { 3016 if (dsa_port_to_master(dp) != lag_dev) 3017 continue; 3018 3019 err = dsa_slave_change_master(dp->slave, master, NULL); 3020 if (err) { 3021 netdev_err(dp->slave, 3022 "failed to restore master to %s: %pe\n", 3023 master->name, ERR_PTR(err)); 3024 } 3025 } 3026 3027 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3028 3029 return err; 3030 } 3031 3032 static void dsa_master_lag_leave(struct net_device *master, 3033 struct net_device *lag_dev) 3034 { 3035 struct dsa_port *dp, *cpu_dp = lag_dev->dsa_ptr; 3036 struct dsa_switch_tree *dst = cpu_dp->dst; 3037 struct dsa_port *new_cpu_dp = NULL; 3038 struct net_device *lower; 3039 struct list_head *iter; 3040 3041 netdev_for_each_lower_dev(lag_dev, lower, iter) { 3042 if (netdev_uses_dsa(lower)) { 3043 new_cpu_dp = lower->dsa_ptr; 3044 break; 3045 } 3046 } 3047 3048 if (new_cpu_dp) { 3049 /* Update the CPU port of the user ports still under the LAG 3050 * so that dsa_port_to_master() continues to work properly 3051 */ 3052 dsa_tree_for_each_user_port(dp, dst) 3053 if (dsa_port_to_master(dp) == lag_dev) 3054 dp->cpu_dp = new_cpu_dp; 3055 3056 /* Update the index of the virtual CPU port to match the lowest 3057 * physical CPU port 3058 */ 3059 lag_dev->dsa_ptr = new_cpu_dp; 3060 wmb(); 3061 } else { 3062 /* If the LAG DSA master has no ports left, migrate back all 3063 * user ports to the first physical CPU port 3064 */ 3065 dsa_tree_migrate_ports_from_lag_master(dst, lag_dev); 3066 } 3067 3068 /* This DSA master has left its LAG in any case, so let 3069 * the CPU port leave the hardware LAG as well 3070 */ 3071 dsa_master_lag_teardown(lag_dev, master->dsa_ptr); 3072 } 3073 3074 static int dsa_master_changeupper(struct net_device *dev, 3075 struct netdev_notifier_changeupper_info *info) 3076 { 3077 struct netlink_ext_ack *extack; 3078 int err = NOTIFY_DONE; 3079 3080 if (!netdev_uses_dsa(dev)) 3081 return err; 3082 3083 extack = netdev_notifier_info_to_extack(&info->info); 3084 3085 if (netif_is_lag_master(info->upper_dev)) { 3086 if (info->linking) { 3087 err = dsa_master_lag_join(dev, info->upper_dev, 3088 info->upper_info, extack); 3089 err = notifier_from_errno(err); 3090 } else { 3091 dsa_master_lag_leave(dev, info->upper_dev); 3092 err = NOTIFY_OK; 3093 } 3094 } 3095 3096 return err; 3097 } 3098 3099 static int dsa_slave_netdevice_event(struct notifier_block *nb, 3100 unsigned long event, void *ptr) 3101 { 3102 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3103 3104 switch (event) { 3105 case NETDEV_PRECHANGEUPPER: { 3106 struct netdev_notifier_changeupper_info *info = ptr; 3107 int err; 3108 3109 err = dsa_slave_prechangeupper_sanity_check(dev, info); 3110 if (notifier_to_errno(err)) 3111 return err; 3112 3113 err = dsa_master_prechangeupper_sanity_check(dev, info); 3114 if (notifier_to_errno(err)) 3115 return err; 3116 3117 err = dsa_lag_master_prechangelower_sanity_check(dev, info); 3118 if (notifier_to_errno(err)) 3119 return err; 3120 3121 err = dsa_bridge_prechangelower_sanity_check(dev, info); 3122 if (notifier_to_errno(err)) 3123 return err; 3124 3125 err = dsa_slave_prechangeupper(dev, ptr); 3126 if (notifier_to_errno(err)) 3127 return err; 3128 3129 err = dsa_slave_lag_prechangeupper(dev, ptr); 3130 if (notifier_to_errno(err)) 3131 return err; 3132 3133 break; 3134 } 3135 case NETDEV_CHANGEUPPER: { 3136 int err; 3137 3138 err = dsa_slave_changeupper(dev, ptr); 3139 if (notifier_to_errno(err)) 3140 return err; 3141 3142 err = dsa_slave_lag_changeupper(dev, ptr); 3143 if (notifier_to_errno(err)) 3144 return err; 3145 3146 err = dsa_master_changeupper(dev, ptr); 3147 if (notifier_to_errno(err)) 3148 return err; 3149 3150 break; 3151 } 3152 case NETDEV_CHANGELOWERSTATE: { 3153 struct netdev_notifier_changelowerstate_info *info = ptr; 3154 struct dsa_port *dp; 3155 int err = 0; 3156 3157 if (dsa_slave_dev_check(dev)) { 3158 dp = dsa_slave_to_port(dev); 3159 3160 err = dsa_port_lag_change(dp, info->lower_state_info); 3161 } 3162 3163 /* Mirror LAG port events on DSA masters that are in 3164 * a LAG towards their respective switch CPU ports 3165 */ 3166 if (netdev_uses_dsa(dev)) { 3167 dp = dev->dsa_ptr; 3168 3169 err = dsa_port_lag_change(dp, info->lower_state_info); 3170 } 3171 3172 return notifier_from_errno(err); 3173 } 3174 case NETDEV_CHANGE: 3175 case NETDEV_UP: { 3176 /* Track state of master port. 3177 * DSA driver may require the master port (and indirectly 3178 * the tagger) to be available for some special operation. 3179 */ 3180 if (netdev_uses_dsa(dev)) { 3181 struct dsa_port *cpu_dp = dev->dsa_ptr; 3182 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 3183 3184 /* Track when the master port is UP */ 3185 dsa_tree_master_oper_state_change(dst, dev, 3186 netif_oper_up(dev)); 3187 3188 /* Track when the master port is ready and can accept 3189 * packet. 3190 * NETDEV_UP event is not enough to flag a port as ready. 3191 * We also have to wait for linkwatch_do_dev to dev_activate 3192 * and emit a NETDEV_CHANGE event. 3193 * We check if a master port is ready by checking if the dev 3194 * have a qdisc assigned and is not noop. 3195 */ 3196 dsa_tree_master_admin_state_change(dst, dev, 3197 !qdisc_tx_is_noop(dev)); 3198 3199 return NOTIFY_OK; 3200 } 3201 3202 return NOTIFY_DONE; 3203 } 3204 case NETDEV_GOING_DOWN: { 3205 struct dsa_port *dp, *cpu_dp; 3206 struct dsa_switch_tree *dst; 3207 LIST_HEAD(close_list); 3208 3209 if (!netdev_uses_dsa(dev)) 3210 return NOTIFY_DONE; 3211 3212 cpu_dp = dev->dsa_ptr; 3213 dst = cpu_dp->ds->dst; 3214 3215 dsa_tree_master_admin_state_change(dst, dev, false); 3216 3217 list_for_each_entry(dp, &dst->ports, list) { 3218 if (!dsa_port_is_user(dp)) 3219 continue; 3220 3221 if (dp->cpu_dp != cpu_dp) 3222 continue; 3223 3224 list_add(&dp->slave->close_list, &close_list); 3225 } 3226 3227 dev_close_many(&close_list, true); 3228 3229 return NOTIFY_OK; 3230 } 3231 default: 3232 break; 3233 } 3234 3235 return NOTIFY_DONE; 3236 } 3237 3238 static void 3239 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 3240 { 3241 struct switchdev_notifier_fdb_info info = {}; 3242 3243 info.addr = switchdev_work->addr; 3244 info.vid = switchdev_work->vid; 3245 info.offloaded = true; 3246 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 3247 switchdev_work->orig_dev, &info.info, NULL); 3248 } 3249 3250 static void dsa_slave_switchdev_event_work(struct work_struct *work) 3251 { 3252 struct dsa_switchdev_event_work *switchdev_work = 3253 container_of(work, struct dsa_switchdev_event_work, work); 3254 const unsigned char *addr = switchdev_work->addr; 3255 struct net_device *dev = switchdev_work->dev; 3256 u16 vid = switchdev_work->vid; 3257 struct dsa_switch *ds; 3258 struct dsa_port *dp; 3259 int err; 3260 3261 dp = dsa_slave_to_port(dev); 3262 ds = dp->ds; 3263 3264 switch (switchdev_work->event) { 3265 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3266 if (switchdev_work->host_addr) 3267 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 3268 else if (dp->lag) 3269 err = dsa_port_lag_fdb_add(dp, addr, vid); 3270 else 3271 err = dsa_port_fdb_add(dp, addr, vid); 3272 if (err) { 3273 dev_err(ds->dev, 3274 "port %d failed to add %pM vid %d to fdb: %d\n", 3275 dp->index, addr, vid, err); 3276 break; 3277 } 3278 dsa_fdb_offload_notify(switchdev_work); 3279 break; 3280 3281 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3282 if (switchdev_work->host_addr) 3283 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 3284 else if (dp->lag) 3285 err = dsa_port_lag_fdb_del(dp, addr, vid); 3286 else 3287 err = dsa_port_fdb_del(dp, addr, vid); 3288 if (err) { 3289 dev_err(ds->dev, 3290 "port %d failed to delete %pM vid %d from fdb: %d\n", 3291 dp->index, addr, vid, err); 3292 } 3293 3294 break; 3295 } 3296 3297 kfree(switchdev_work); 3298 } 3299 3300 static bool dsa_foreign_dev_check(const struct net_device *dev, 3301 const struct net_device *foreign_dev) 3302 { 3303 const struct dsa_port *dp = dsa_slave_to_port(dev); 3304 struct dsa_switch_tree *dst = dp->ds->dst; 3305 3306 if (netif_is_bridge_master(foreign_dev)) 3307 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 3308 3309 if (netif_is_bridge_port(foreign_dev)) 3310 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 3311 3312 /* Everything else is foreign */ 3313 return true; 3314 } 3315 3316 static int dsa_slave_fdb_event(struct net_device *dev, 3317 struct net_device *orig_dev, 3318 unsigned long event, const void *ctx, 3319 const struct switchdev_notifier_fdb_info *fdb_info) 3320 { 3321 struct dsa_switchdev_event_work *switchdev_work; 3322 struct dsa_port *dp = dsa_slave_to_port(dev); 3323 bool host_addr = fdb_info->is_local; 3324 struct dsa_switch *ds = dp->ds; 3325 3326 if (ctx && ctx != dp) 3327 return 0; 3328 3329 if (!dp->bridge) 3330 return 0; 3331 3332 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 3333 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 3334 return 0; 3335 3336 /* FDB entries learned by the software bridge or by foreign 3337 * bridge ports should be installed as host addresses only if 3338 * the driver requests assisted learning. 3339 */ 3340 if (!ds->assisted_learning_on_cpu_port) 3341 return 0; 3342 } 3343 3344 /* Also treat FDB entries on foreign interfaces bridged with us as host 3345 * addresses. 3346 */ 3347 if (dsa_foreign_dev_check(dev, orig_dev)) 3348 host_addr = true; 3349 3350 /* Check early that we're not doing work in vain. 3351 * Host addresses on LAG ports still require regular FDB ops, 3352 * since the CPU port isn't in a LAG. 3353 */ 3354 if (dp->lag && !host_addr) { 3355 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 3356 return -EOPNOTSUPP; 3357 } else { 3358 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 3359 return -EOPNOTSUPP; 3360 } 3361 3362 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 3363 if (!switchdev_work) 3364 return -ENOMEM; 3365 3366 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 3367 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 3368 orig_dev->name, fdb_info->addr, fdb_info->vid, 3369 host_addr ? " as host address" : ""); 3370 3371 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work); 3372 switchdev_work->event = event; 3373 switchdev_work->dev = dev; 3374 switchdev_work->orig_dev = orig_dev; 3375 3376 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 3377 switchdev_work->vid = fdb_info->vid; 3378 switchdev_work->host_addr = host_addr; 3379 3380 dsa_schedule_work(&switchdev_work->work); 3381 3382 return 0; 3383 } 3384 3385 /* Called under rcu_read_lock() */ 3386 static int dsa_slave_switchdev_event(struct notifier_block *unused, 3387 unsigned long event, void *ptr) 3388 { 3389 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3390 int err; 3391 3392 switch (event) { 3393 case SWITCHDEV_PORT_ATTR_SET: 3394 err = switchdev_handle_port_attr_set(dev, ptr, 3395 dsa_slave_dev_check, 3396 dsa_slave_port_attr_set); 3397 return notifier_from_errno(err); 3398 case SWITCHDEV_FDB_ADD_TO_DEVICE: 3399 case SWITCHDEV_FDB_DEL_TO_DEVICE: 3400 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 3401 dsa_slave_dev_check, 3402 dsa_foreign_dev_check, 3403 dsa_slave_fdb_event); 3404 return notifier_from_errno(err); 3405 default: 3406 return NOTIFY_DONE; 3407 } 3408 3409 return NOTIFY_OK; 3410 } 3411 3412 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 3413 unsigned long event, void *ptr) 3414 { 3415 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 3416 int err; 3417 3418 switch (event) { 3419 case SWITCHDEV_PORT_OBJ_ADD: 3420 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 3421 dsa_slave_dev_check, 3422 dsa_foreign_dev_check, 3423 dsa_slave_port_obj_add); 3424 return notifier_from_errno(err); 3425 case SWITCHDEV_PORT_OBJ_DEL: 3426 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 3427 dsa_slave_dev_check, 3428 dsa_foreign_dev_check, 3429 dsa_slave_port_obj_del); 3430 return notifier_from_errno(err); 3431 case SWITCHDEV_PORT_ATTR_SET: 3432 err = switchdev_handle_port_attr_set(dev, ptr, 3433 dsa_slave_dev_check, 3434 dsa_slave_port_attr_set); 3435 return notifier_from_errno(err); 3436 } 3437 3438 return NOTIFY_DONE; 3439 } 3440 3441 static struct notifier_block dsa_slave_nb __read_mostly = { 3442 .notifier_call = dsa_slave_netdevice_event, 3443 }; 3444 3445 struct notifier_block dsa_slave_switchdev_notifier = { 3446 .notifier_call = dsa_slave_switchdev_event, 3447 }; 3448 3449 struct notifier_block dsa_slave_switchdev_blocking_notifier = { 3450 .notifier_call = dsa_slave_switchdev_blocking_event, 3451 }; 3452 3453 int dsa_slave_register_notifier(void) 3454 { 3455 struct notifier_block *nb; 3456 int err; 3457 3458 err = register_netdevice_notifier(&dsa_slave_nb); 3459 if (err) 3460 return err; 3461 3462 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 3463 if (err) 3464 goto err_switchdev_nb; 3465 3466 nb = &dsa_slave_switchdev_blocking_notifier; 3467 err = register_switchdev_blocking_notifier(nb); 3468 if (err) 3469 goto err_switchdev_blocking_nb; 3470 3471 return 0; 3472 3473 err_switchdev_blocking_nb: 3474 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3475 err_switchdev_nb: 3476 unregister_netdevice_notifier(&dsa_slave_nb); 3477 return err; 3478 } 3479 3480 void dsa_slave_unregister_notifier(void) 3481 { 3482 struct notifier_block *nb; 3483 int err; 3484 3485 nb = &dsa_slave_switchdev_blocking_notifier; 3486 err = unregister_switchdev_blocking_notifier(nb); 3487 if (err) 3488 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3489 3490 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3491 if (err) 3492 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3493 3494 err = unregister_netdevice_notifier(&dsa_slave_nb); 3495 if (err) 3496 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 3497 } 3498