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 <linux/netpoll.h> 23 24 #include "dsa_priv.h" 25 26 static void dsa_slave_standalone_event_work(struct work_struct *work) 27 { 28 struct dsa_standalone_event_work *standalone_work = 29 container_of(work, struct dsa_standalone_event_work, work); 30 const unsigned char *addr = standalone_work->addr; 31 struct net_device *dev = standalone_work->dev; 32 struct dsa_port *dp = dsa_slave_to_port(dev); 33 struct switchdev_obj_port_mdb mdb; 34 struct dsa_switch *ds = dp->ds; 35 u16 vid = standalone_work->vid; 36 int err; 37 38 switch (standalone_work->event) { 39 case DSA_UC_ADD: 40 err = dsa_port_standalone_host_fdb_add(dp, addr, vid); 41 if (err) { 42 dev_err(ds->dev, 43 "port %d failed to add %pM vid %d to fdb: %d\n", 44 dp->index, addr, vid, err); 45 break; 46 } 47 break; 48 49 case DSA_UC_DEL: 50 err = dsa_port_standalone_host_fdb_del(dp, addr, vid); 51 if (err) { 52 dev_err(ds->dev, 53 "port %d failed to delete %pM vid %d from fdb: %d\n", 54 dp->index, addr, vid, err); 55 } 56 57 break; 58 case DSA_MC_ADD: 59 ether_addr_copy(mdb.addr, addr); 60 mdb.vid = vid; 61 62 err = dsa_port_standalone_host_mdb_add(dp, &mdb); 63 if (err) { 64 dev_err(ds->dev, 65 "port %d failed to add %pM vid %d to mdb: %d\n", 66 dp->index, addr, vid, err); 67 break; 68 } 69 break; 70 case DSA_MC_DEL: 71 ether_addr_copy(mdb.addr, addr); 72 mdb.vid = vid; 73 74 err = dsa_port_standalone_host_mdb_del(dp, &mdb); 75 if (err) { 76 dev_err(ds->dev, 77 "port %d failed to delete %pM vid %d from mdb: %d\n", 78 dp->index, addr, vid, err); 79 } 80 81 break; 82 } 83 84 kfree(standalone_work); 85 } 86 87 static int dsa_slave_schedule_standalone_work(struct net_device *dev, 88 enum dsa_standalone_event event, 89 const unsigned char *addr, 90 u16 vid) 91 { 92 struct dsa_standalone_event_work *standalone_work; 93 94 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC); 95 if (!standalone_work) 96 return -ENOMEM; 97 98 INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work); 99 standalone_work->event = event; 100 standalone_work->dev = dev; 101 102 ether_addr_copy(standalone_work->addr, addr); 103 standalone_work->vid = vid; 104 105 dsa_schedule_work(&standalone_work->work); 106 107 return 0; 108 } 109 110 static int dsa_slave_sync_uc(struct net_device *dev, 111 const unsigned char *addr) 112 { 113 return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0); 114 } 115 116 static int dsa_slave_unsync_uc(struct net_device *dev, 117 const unsigned char *addr) 118 { 119 return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0); 120 } 121 122 static int dsa_slave_sync_mc(struct net_device *dev, 123 const unsigned char *addr) 124 { 125 return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0); 126 } 127 128 static int dsa_slave_unsync_mc(struct net_device *dev, 129 const unsigned char *addr) 130 { 131 return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0); 132 } 133 134 /* slave mii_bus handling ***************************************************/ 135 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 136 { 137 struct dsa_switch *ds = bus->priv; 138 139 if (ds->phys_mii_mask & (1 << addr)) 140 return ds->ops->phy_read(ds, addr, reg); 141 142 return 0xffff; 143 } 144 145 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 146 { 147 struct dsa_switch *ds = bus->priv; 148 149 if (ds->phys_mii_mask & (1 << addr)) 150 return ds->ops->phy_write(ds, addr, reg, val); 151 152 return 0; 153 } 154 155 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 156 { 157 ds->slave_mii_bus->priv = (void *)ds; 158 ds->slave_mii_bus->name = "dsa slave smi"; 159 ds->slave_mii_bus->read = dsa_slave_phy_read; 160 ds->slave_mii_bus->write = dsa_slave_phy_write; 161 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 162 ds->dst->index, ds->index); 163 ds->slave_mii_bus->parent = ds->dev; 164 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 165 } 166 167 168 /* slave device handling ****************************************************/ 169 static int dsa_slave_get_iflink(const struct net_device *dev) 170 { 171 return dsa_slave_to_master(dev)->ifindex; 172 } 173 174 static int dsa_slave_open(struct net_device *dev) 175 { 176 struct net_device *master = dsa_slave_to_master(dev); 177 struct dsa_port *dp = dsa_slave_to_port(dev); 178 struct dsa_switch *ds = dp->ds; 179 int err; 180 181 err = dev_open(master, NULL); 182 if (err < 0) { 183 netdev_err(dev, "failed to open master %s\n", master->name); 184 goto out; 185 } 186 187 if (dsa_switch_supports_uc_filtering(ds)) { 188 err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0); 189 if (err) 190 goto out; 191 } 192 193 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 194 err = dev_uc_add(master, dev->dev_addr); 195 if (err < 0) 196 goto del_host_addr; 197 } 198 199 err = dsa_port_enable_rt(dp, dev->phydev); 200 if (err) 201 goto del_unicast; 202 203 return 0; 204 205 del_unicast: 206 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 207 dev_uc_del(master, dev->dev_addr); 208 del_host_addr: 209 if (dsa_switch_supports_uc_filtering(ds)) 210 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 211 out: 212 return err; 213 } 214 215 static int dsa_slave_close(struct net_device *dev) 216 { 217 struct net_device *master = dsa_slave_to_master(dev); 218 struct dsa_port *dp = dsa_slave_to_port(dev); 219 struct dsa_switch *ds = dp->ds; 220 221 dsa_port_disable_rt(dp); 222 223 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 224 dev_uc_del(master, dev->dev_addr); 225 226 if (dsa_switch_supports_uc_filtering(ds)) 227 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 228 229 return 0; 230 } 231 232 /* Keep flooding enabled towards this port's CPU port as long as it serves at 233 * least one port in the tree that requires it. 234 */ 235 static void dsa_port_manage_cpu_flood(struct dsa_port *dp) 236 { 237 struct switchdev_brport_flags flags = { 238 .mask = BR_FLOOD | BR_MCAST_FLOOD, 239 }; 240 struct dsa_switch_tree *dst = dp->ds->dst; 241 struct dsa_port *cpu_dp = dp->cpu_dp; 242 struct dsa_port *other_dp; 243 int err; 244 245 list_for_each_entry(other_dp, &dst->ports, list) { 246 if (!dsa_port_is_user(other_dp)) 247 continue; 248 249 if (other_dp->cpu_dp != cpu_dp) 250 continue; 251 252 if (other_dp->slave->flags & IFF_ALLMULTI) 253 flags.val |= BR_MCAST_FLOOD; 254 if (other_dp->slave->flags & IFF_PROMISC) 255 flags.val |= BR_FLOOD; 256 } 257 258 err = dsa_port_pre_bridge_flags(dp, flags, NULL); 259 if (err) 260 return; 261 262 dsa_port_bridge_flags(cpu_dp, flags, NULL); 263 } 264 265 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 266 { 267 struct net_device *master = dsa_slave_to_master(dev); 268 struct dsa_port *dp = dsa_slave_to_port(dev); 269 struct dsa_switch *ds = dp->ds; 270 271 if (change & IFF_ALLMULTI) 272 dev_set_allmulti(master, 273 dev->flags & IFF_ALLMULTI ? 1 : -1); 274 if (change & IFF_PROMISC) 275 dev_set_promiscuity(master, 276 dev->flags & IFF_PROMISC ? 1 : -1); 277 278 if (dsa_switch_supports_uc_filtering(ds) && 279 dsa_switch_supports_mc_filtering(ds)) 280 dsa_port_manage_cpu_flood(dp); 281 } 282 283 static void dsa_slave_set_rx_mode(struct net_device *dev) 284 { 285 struct net_device *master = dsa_slave_to_master(dev); 286 struct dsa_port *dp = dsa_slave_to_port(dev); 287 struct dsa_switch *ds = dp->ds; 288 289 dev_mc_sync(master, dev); 290 dev_uc_sync(master, dev); 291 if (dsa_switch_supports_mc_filtering(ds)) 292 __dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc); 293 if (dsa_switch_supports_uc_filtering(ds)) 294 __dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc); 295 } 296 297 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 298 { 299 struct net_device *master = dsa_slave_to_master(dev); 300 struct dsa_port *dp = dsa_slave_to_port(dev); 301 struct dsa_switch *ds = dp->ds; 302 struct sockaddr *addr = a; 303 int err; 304 305 if (!is_valid_ether_addr(addr->sa_data)) 306 return -EADDRNOTAVAIL; 307 308 if (dsa_switch_supports_uc_filtering(ds)) { 309 err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0); 310 if (err) 311 return err; 312 } 313 314 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 315 err = dev_uc_add(master, addr->sa_data); 316 if (err < 0) 317 goto del_unicast; 318 } 319 320 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 321 dev_uc_del(master, dev->dev_addr); 322 323 if (dsa_switch_supports_uc_filtering(ds)) 324 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 325 326 eth_hw_addr_set(dev, addr->sa_data); 327 328 return 0; 329 330 del_unicast: 331 if (dsa_switch_supports_uc_filtering(ds)) 332 dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0); 333 334 return err; 335 } 336 337 struct dsa_slave_dump_ctx { 338 struct net_device *dev; 339 struct sk_buff *skb; 340 struct netlink_callback *cb; 341 int idx; 342 }; 343 344 static int 345 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 346 bool is_static, void *data) 347 { 348 struct dsa_slave_dump_ctx *dump = data; 349 u32 portid = NETLINK_CB(dump->cb->skb).portid; 350 u32 seq = dump->cb->nlh->nlmsg_seq; 351 struct nlmsghdr *nlh; 352 struct ndmsg *ndm; 353 354 if (dump->idx < dump->cb->args[2]) 355 goto skip; 356 357 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 358 sizeof(*ndm), NLM_F_MULTI); 359 if (!nlh) 360 return -EMSGSIZE; 361 362 ndm = nlmsg_data(nlh); 363 ndm->ndm_family = AF_BRIDGE; 364 ndm->ndm_pad1 = 0; 365 ndm->ndm_pad2 = 0; 366 ndm->ndm_flags = NTF_SELF; 367 ndm->ndm_type = 0; 368 ndm->ndm_ifindex = dump->dev->ifindex; 369 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 370 371 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 372 goto nla_put_failure; 373 374 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 375 goto nla_put_failure; 376 377 nlmsg_end(dump->skb, nlh); 378 379 skip: 380 dump->idx++; 381 return 0; 382 383 nla_put_failure: 384 nlmsg_cancel(dump->skb, nlh); 385 return -EMSGSIZE; 386 } 387 388 static int 389 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 390 struct net_device *dev, struct net_device *filter_dev, 391 int *idx) 392 { 393 struct dsa_port *dp = dsa_slave_to_port(dev); 394 struct dsa_slave_dump_ctx dump = { 395 .dev = dev, 396 .skb = skb, 397 .cb = cb, 398 .idx = *idx, 399 }; 400 int err; 401 402 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 403 *idx = dump.idx; 404 405 return err; 406 } 407 408 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 409 { 410 struct dsa_slave_priv *p = netdev_priv(dev); 411 struct dsa_switch *ds = p->dp->ds; 412 int port = p->dp->index; 413 414 /* Pass through to switch driver if it supports timestamping */ 415 switch (cmd) { 416 case SIOCGHWTSTAMP: 417 if (ds->ops->port_hwtstamp_get) 418 return ds->ops->port_hwtstamp_get(ds, port, ifr); 419 break; 420 case SIOCSHWTSTAMP: 421 if (ds->ops->port_hwtstamp_set) 422 return ds->ops->port_hwtstamp_set(ds, port, ifr); 423 break; 424 } 425 426 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 427 } 428 429 static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx, 430 const struct switchdev_attr *attr, 431 struct netlink_ext_ack *extack) 432 { 433 struct dsa_port *dp = dsa_slave_to_port(dev); 434 int ret; 435 436 if (ctx && ctx != dp) 437 return 0; 438 439 switch (attr->id) { 440 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 441 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 442 return -EOPNOTSUPP; 443 444 ret = dsa_port_set_state(dp, attr->u.stp_state, true); 445 break; 446 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 447 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 448 return -EOPNOTSUPP; 449 450 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 451 extack); 452 break; 453 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 454 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 455 return -EOPNOTSUPP; 456 457 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 458 break; 459 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 460 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 461 return -EOPNOTSUPP; 462 463 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 464 extack); 465 break; 466 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 467 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 468 return -EOPNOTSUPP; 469 470 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 471 break; 472 default: 473 ret = -EOPNOTSUPP; 474 break; 475 } 476 477 return ret; 478 } 479 480 /* Must be called under rcu_read_lock() */ 481 static int 482 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave, 483 const struct switchdev_obj_port_vlan *vlan) 484 { 485 struct net_device *upper_dev; 486 struct list_head *iter; 487 488 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 489 u16 vid; 490 491 if (!is_vlan_dev(upper_dev)) 492 continue; 493 494 vid = vlan_dev_vlan_id(upper_dev); 495 if (vid == vlan->vid) 496 return -EBUSY; 497 } 498 499 return 0; 500 } 501 502 static int dsa_slave_vlan_add(struct net_device *dev, 503 const struct switchdev_obj *obj, 504 struct netlink_ext_ack *extack) 505 { 506 struct dsa_port *dp = dsa_slave_to_port(dev); 507 struct switchdev_obj_port_vlan *vlan; 508 int err; 509 510 if (dsa_port_skip_vlan_configuration(dp)) { 511 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 512 return 0; 513 } 514 515 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 516 517 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 518 * the same VID. 519 */ 520 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { 521 rcu_read_lock(); 522 err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan); 523 rcu_read_unlock(); 524 if (err) { 525 NL_SET_ERR_MSG_MOD(extack, 526 "Port already has a VLAN upper with this VID"); 527 return err; 528 } 529 } 530 531 return dsa_port_vlan_add(dp, vlan, extack); 532 } 533 534 /* Offload a VLAN installed on the bridge or on a foreign interface by 535 * installing it as a VLAN towards the CPU port. 536 */ 537 static int dsa_slave_host_vlan_add(struct net_device *dev, 538 const struct switchdev_obj *obj, 539 struct netlink_ext_ack *extack) 540 { 541 struct dsa_port *dp = dsa_slave_to_port(dev); 542 struct switchdev_obj_port_vlan vlan; 543 544 /* Do nothing if this is a software bridge */ 545 if (!dp->bridge) 546 return -EOPNOTSUPP; 547 548 if (dsa_port_skip_vlan_configuration(dp)) { 549 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 550 return 0; 551 } 552 553 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 554 555 /* Even though drivers often handle CPU membership in special ways, 556 * it doesn't make sense to program a PVID, so clear this flag. 557 */ 558 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 559 560 return dsa_port_host_vlan_add(dp, &vlan, extack); 561 } 562 563 static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, 564 const struct switchdev_obj *obj, 565 struct netlink_ext_ack *extack) 566 { 567 struct dsa_port *dp = dsa_slave_to_port(dev); 568 int err; 569 570 if (ctx && ctx != dp) 571 return 0; 572 573 switch (obj->id) { 574 case SWITCHDEV_OBJ_ID_PORT_MDB: 575 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 576 return -EOPNOTSUPP; 577 578 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 579 break; 580 case SWITCHDEV_OBJ_ID_HOST_MDB: 581 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 582 return -EOPNOTSUPP; 583 584 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 585 break; 586 case SWITCHDEV_OBJ_ID_PORT_VLAN: 587 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 588 err = dsa_slave_vlan_add(dev, obj, extack); 589 else 590 err = dsa_slave_host_vlan_add(dev, obj, extack); 591 break; 592 case SWITCHDEV_OBJ_ID_MRP: 593 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 594 return -EOPNOTSUPP; 595 596 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 597 break; 598 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 599 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 600 return -EOPNOTSUPP; 601 602 err = dsa_port_mrp_add_ring_role(dp, 603 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 604 break; 605 default: 606 err = -EOPNOTSUPP; 607 break; 608 } 609 610 return err; 611 } 612 613 static int dsa_slave_vlan_del(struct net_device *dev, 614 const struct switchdev_obj *obj) 615 { 616 struct dsa_port *dp = dsa_slave_to_port(dev); 617 struct switchdev_obj_port_vlan *vlan; 618 619 if (dsa_port_skip_vlan_configuration(dp)) 620 return 0; 621 622 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 623 624 return dsa_port_vlan_del(dp, vlan); 625 } 626 627 static int dsa_slave_host_vlan_del(struct net_device *dev, 628 const struct switchdev_obj *obj) 629 { 630 struct dsa_port *dp = dsa_slave_to_port(dev); 631 struct switchdev_obj_port_vlan *vlan; 632 633 /* Do nothing if this is a software bridge */ 634 if (!dp->bridge) 635 return -EOPNOTSUPP; 636 637 if (dsa_port_skip_vlan_configuration(dp)) 638 return 0; 639 640 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 641 642 return dsa_port_host_vlan_del(dp, vlan); 643 } 644 645 static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx, 646 const struct switchdev_obj *obj) 647 { 648 struct dsa_port *dp = dsa_slave_to_port(dev); 649 int err; 650 651 if (ctx && ctx != dp) 652 return 0; 653 654 switch (obj->id) { 655 case SWITCHDEV_OBJ_ID_PORT_MDB: 656 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 657 return -EOPNOTSUPP; 658 659 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 660 break; 661 case SWITCHDEV_OBJ_ID_HOST_MDB: 662 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 663 return -EOPNOTSUPP; 664 665 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 666 break; 667 case SWITCHDEV_OBJ_ID_PORT_VLAN: 668 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 669 err = dsa_slave_vlan_del(dev, obj); 670 else 671 err = dsa_slave_host_vlan_del(dev, obj); 672 break; 673 case SWITCHDEV_OBJ_ID_MRP: 674 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 675 return -EOPNOTSUPP; 676 677 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 678 break; 679 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 680 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 681 return -EOPNOTSUPP; 682 683 err = dsa_port_mrp_del_ring_role(dp, 684 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 685 break; 686 default: 687 err = -EOPNOTSUPP; 688 break; 689 } 690 691 return err; 692 } 693 694 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 695 struct sk_buff *skb) 696 { 697 #ifdef CONFIG_NET_POLL_CONTROLLER 698 struct dsa_slave_priv *p = netdev_priv(dev); 699 700 return netpoll_send_skb(p->netpoll, skb); 701 #else 702 BUG(); 703 return NETDEV_TX_OK; 704 #endif 705 } 706 707 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 708 struct sk_buff *skb) 709 { 710 struct dsa_switch *ds = p->dp->ds; 711 712 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 713 return; 714 715 if (!ds->ops->port_txtstamp) 716 return; 717 718 ds->ops->port_txtstamp(ds, p->dp->index, skb); 719 } 720 721 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 722 { 723 /* SKB for netpoll still need to be mangled with the protocol-specific 724 * tag to be successfully transmitted 725 */ 726 if (unlikely(netpoll_tx_running(dev))) 727 return dsa_slave_netpoll_send_skb(dev, skb); 728 729 /* Queue the SKB for transmission on the parent interface, but 730 * do not modify its EtherType 731 */ 732 skb->dev = dsa_slave_to_master(dev); 733 dev_queue_xmit(skb); 734 735 return NETDEV_TX_OK; 736 } 737 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 738 739 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) 740 { 741 int needed_headroom = dev->needed_headroom; 742 int needed_tailroom = dev->needed_tailroom; 743 744 /* For tail taggers, we need to pad short frames ourselves, to ensure 745 * that the tail tag does not fail at its role of being at the end of 746 * the packet, once the master interface pads the frame. Account for 747 * that pad length here, and pad later. 748 */ 749 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) 750 needed_tailroom += ETH_ZLEN - skb->len; 751 /* skb_headroom() returns unsigned int... */ 752 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); 753 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); 754 755 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) 756 /* No reallocation needed, yay! */ 757 return 0; 758 759 return pskb_expand_head(skb, needed_headroom, needed_tailroom, 760 GFP_ATOMIC); 761 } 762 763 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 764 { 765 struct dsa_slave_priv *p = netdev_priv(dev); 766 struct sk_buff *nskb; 767 768 dev_sw_netstats_tx_add(dev, 1, skb->len); 769 770 memset(skb->cb, 0, sizeof(skb->cb)); 771 772 /* Handle tx timestamp if any */ 773 dsa_skb_tx_timestamp(p, skb); 774 775 if (dsa_realloc_skb(skb, dev)) { 776 dev_kfree_skb_any(skb); 777 return NETDEV_TX_OK; 778 } 779 780 /* needed_tailroom should still be 'warm' in the cache line from 781 * dsa_realloc_skb(), which has also ensured that padding is safe. 782 */ 783 if (dev->needed_tailroom) 784 eth_skb_pad(skb); 785 786 /* Transmit function may have to reallocate the original SKB, 787 * in which case it must have freed it. Only free it here on error. 788 */ 789 nskb = p->xmit(skb, dev); 790 if (!nskb) { 791 kfree_skb(skb); 792 return NETDEV_TX_OK; 793 } 794 795 return dsa_enqueue_skb(nskb, dev); 796 } 797 798 /* ethtool operations *******************************************************/ 799 800 static void dsa_slave_get_drvinfo(struct net_device *dev, 801 struct ethtool_drvinfo *drvinfo) 802 { 803 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 804 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 805 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 806 } 807 808 static int dsa_slave_get_regs_len(struct net_device *dev) 809 { 810 struct dsa_port *dp = dsa_slave_to_port(dev); 811 struct dsa_switch *ds = dp->ds; 812 813 if (ds->ops->get_regs_len) 814 return ds->ops->get_regs_len(ds, dp->index); 815 816 return -EOPNOTSUPP; 817 } 818 819 static void 820 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 821 { 822 struct dsa_port *dp = dsa_slave_to_port(dev); 823 struct dsa_switch *ds = dp->ds; 824 825 if (ds->ops->get_regs) 826 ds->ops->get_regs(ds, dp->index, regs, _p); 827 } 828 829 static int dsa_slave_nway_reset(struct net_device *dev) 830 { 831 struct dsa_port *dp = dsa_slave_to_port(dev); 832 833 return phylink_ethtool_nway_reset(dp->pl); 834 } 835 836 static int dsa_slave_get_eeprom_len(struct net_device *dev) 837 { 838 struct dsa_port *dp = dsa_slave_to_port(dev); 839 struct dsa_switch *ds = dp->ds; 840 841 if (ds->cd && ds->cd->eeprom_len) 842 return ds->cd->eeprom_len; 843 844 if (ds->ops->get_eeprom_len) 845 return ds->ops->get_eeprom_len(ds); 846 847 return 0; 848 } 849 850 static int dsa_slave_get_eeprom(struct net_device *dev, 851 struct ethtool_eeprom *eeprom, u8 *data) 852 { 853 struct dsa_port *dp = dsa_slave_to_port(dev); 854 struct dsa_switch *ds = dp->ds; 855 856 if (ds->ops->get_eeprom) 857 return ds->ops->get_eeprom(ds, eeprom, data); 858 859 return -EOPNOTSUPP; 860 } 861 862 static int dsa_slave_set_eeprom(struct net_device *dev, 863 struct ethtool_eeprom *eeprom, u8 *data) 864 { 865 struct dsa_port *dp = dsa_slave_to_port(dev); 866 struct dsa_switch *ds = dp->ds; 867 868 if (ds->ops->set_eeprom) 869 return ds->ops->set_eeprom(ds, eeprom, data); 870 871 return -EOPNOTSUPP; 872 } 873 874 static void dsa_slave_get_strings(struct net_device *dev, 875 uint32_t stringset, uint8_t *data) 876 { 877 struct dsa_port *dp = dsa_slave_to_port(dev); 878 struct dsa_switch *ds = dp->ds; 879 880 if (stringset == ETH_SS_STATS) { 881 int len = ETH_GSTRING_LEN; 882 883 strncpy(data, "tx_packets", len); 884 strncpy(data + len, "tx_bytes", len); 885 strncpy(data + 2 * len, "rx_packets", len); 886 strncpy(data + 3 * len, "rx_bytes", len); 887 if (ds->ops->get_strings) 888 ds->ops->get_strings(ds, dp->index, stringset, 889 data + 4 * len); 890 } else if (stringset == ETH_SS_TEST) { 891 net_selftest_get_strings(data); 892 } 893 894 } 895 896 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 897 struct ethtool_stats *stats, 898 uint64_t *data) 899 { 900 struct dsa_port *dp = dsa_slave_to_port(dev); 901 struct dsa_switch *ds = dp->ds; 902 struct pcpu_sw_netstats *s; 903 unsigned int start; 904 int i; 905 906 for_each_possible_cpu(i) { 907 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 908 909 s = per_cpu_ptr(dev->tstats, i); 910 do { 911 start = u64_stats_fetch_begin_irq(&s->syncp); 912 tx_packets = s->tx_packets; 913 tx_bytes = s->tx_bytes; 914 rx_packets = s->rx_packets; 915 rx_bytes = s->rx_bytes; 916 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 917 data[0] += tx_packets; 918 data[1] += tx_bytes; 919 data[2] += rx_packets; 920 data[3] += rx_bytes; 921 } 922 if (ds->ops->get_ethtool_stats) 923 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 924 } 925 926 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 927 { 928 struct dsa_port *dp = dsa_slave_to_port(dev); 929 struct dsa_switch *ds = dp->ds; 930 931 if (sset == ETH_SS_STATS) { 932 int count = 0; 933 934 if (ds->ops->get_sset_count) { 935 count = ds->ops->get_sset_count(ds, dp->index, sset); 936 if (count < 0) 937 return count; 938 } 939 940 return count + 4; 941 } else if (sset == ETH_SS_TEST) { 942 return net_selftest_get_count(); 943 } 944 945 return -EOPNOTSUPP; 946 } 947 948 static void dsa_slave_get_eth_phy_stats(struct net_device *dev, 949 struct ethtool_eth_phy_stats *phy_stats) 950 { 951 struct dsa_port *dp = dsa_slave_to_port(dev); 952 struct dsa_switch *ds = dp->ds; 953 954 if (ds->ops->get_eth_phy_stats) 955 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats); 956 } 957 958 static void dsa_slave_get_eth_mac_stats(struct net_device *dev, 959 struct ethtool_eth_mac_stats *mac_stats) 960 { 961 struct dsa_port *dp = dsa_slave_to_port(dev); 962 struct dsa_switch *ds = dp->ds; 963 964 if (ds->ops->get_eth_mac_stats) 965 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats); 966 } 967 968 static void 969 dsa_slave_get_eth_ctrl_stats(struct net_device *dev, 970 struct ethtool_eth_ctrl_stats *ctrl_stats) 971 { 972 struct dsa_port *dp = dsa_slave_to_port(dev); 973 struct dsa_switch *ds = dp->ds; 974 975 if (ds->ops->get_eth_ctrl_stats) 976 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats); 977 } 978 979 static void dsa_slave_net_selftest(struct net_device *ndev, 980 struct ethtool_test *etest, u64 *buf) 981 { 982 struct dsa_port *dp = dsa_slave_to_port(ndev); 983 struct dsa_switch *ds = dp->ds; 984 985 if (ds->ops->self_test) { 986 ds->ops->self_test(ds, dp->index, etest, buf); 987 return; 988 } 989 990 net_selftest(ndev, etest, buf); 991 } 992 993 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 994 { 995 struct dsa_port *dp = dsa_slave_to_port(dev); 996 struct dsa_switch *ds = dp->ds; 997 998 phylink_ethtool_get_wol(dp->pl, w); 999 1000 if (ds->ops->get_wol) 1001 ds->ops->get_wol(ds, dp->index, w); 1002 } 1003 1004 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1005 { 1006 struct dsa_port *dp = dsa_slave_to_port(dev); 1007 struct dsa_switch *ds = dp->ds; 1008 int ret = -EOPNOTSUPP; 1009 1010 phylink_ethtool_set_wol(dp->pl, w); 1011 1012 if (ds->ops->set_wol) 1013 ret = ds->ops->set_wol(ds, dp->index, w); 1014 1015 return ret; 1016 } 1017 1018 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 1019 { 1020 struct dsa_port *dp = dsa_slave_to_port(dev); 1021 struct dsa_switch *ds = dp->ds; 1022 int ret; 1023 1024 /* Port's PHY and MAC both need to be EEE capable */ 1025 if (!dev->phydev || !dp->pl) 1026 return -ENODEV; 1027 1028 if (!ds->ops->set_mac_eee) 1029 return -EOPNOTSUPP; 1030 1031 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1032 if (ret) 1033 return ret; 1034 1035 return phylink_ethtool_set_eee(dp->pl, e); 1036 } 1037 1038 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 1039 { 1040 struct dsa_port *dp = dsa_slave_to_port(dev); 1041 struct dsa_switch *ds = dp->ds; 1042 int ret; 1043 1044 /* Port's PHY and MAC both need to be EEE capable */ 1045 if (!dev->phydev || !dp->pl) 1046 return -ENODEV; 1047 1048 if (!ds->ops->get_mac_eee) 1049 return -EOPNOTSUPP; 1050 1051 ret = ds->ops->get_mac_eee(ds, dp->index, e); 1052 if (ret) 1053 return ret; 1054 1055 return phylink_ethtool_get_eee(dp->pl, e); 1056 } 1057 1058 static int dsa_slave_get_link_ksettings(struct net_device *dev, 1059 struct ethtool_link_ksettings *cmd) 1060 { 1061 struct dsa_port *dp = dsa_slave_to_port(dev); 1062 1063 return phylink_ethtool_ksettings_get(dp->pl, cmd); 1064 } 1065 1066 static int dsa_slave_set_link_ksettings(struct net_device *dev, 1067 const struct ethtool_link_ksettings *cmd) 1068 { 1069 struct dsa_port *dp = dsa_slave_to_port(dev); 1070 1071 return phylink_ethtool_ksettings_set(dp->pl, cmd); 1072 } 1073 1074 static void dsa_slave_get_pauseparam(struct net_device *dev, 1075 struct ethtool_pauseparam *pause) 1076 { 1077 struct dsa_port *dp = dsa_slave_to_port(dev); 1078 1079 phylink_ethtool_get_pauseparam(dp->pl, pause); 1080 } 1081 1082 static int dsa_slave_set_pauseparam(struct net_device *dev, 1083 struct ethtool_pauseparam *pause) 1084 { 1085 struct dsa_port *dp = dsa_slave_to_port(dev); 1086 1087 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1088 } 1089 1090 #ifdef CONFIG_NET_POLL_CONTROLLER 1091 static int dsa_slave_netpoll_setup(struct net_device *dev, 1092 struct netpoll_info *ni) 1093 { 1094 struct net_device *master = dsa_slave_to_master(dev); 1095 struct dsa_slave_priv *p = netdev_priv(dev); 1096 struct netpoll *netpoll; 1097 int err = 0; 1098 1099 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1100 if (!netpoll) 1101 return -ENOMEM; 1102 1103 err = __netpoll_setup(netpoll, master); 1104 if (err) { 1105 kfree(netpoll); 1106 goto out; 1107 } 1108 1109 p->netpoll = netpoll; 1110 out: 1111 return err; 1112 } 1113 1114 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 1115 { 1116 struct dsa_slave_priv *p = netdev_priv(dev); 1117 struct netpoll *netpoll = p->netpoll; 1118 1119 if (!netpoll) 1120 return; 1121 1122 p->netpoll = NULL; 1123 1124 __netpoll_free(netpoll); 1125 } 1126 1127 static void dsa_slave_poll_controller(struct net_device *dev) 1128 { 1129 } 1130 #endif 1131 1132 static struct dsa_mall_tc_entry * 1133 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1134 { 1135 struct dsa_slave_priv *p = netdev_priv(dev); 1136 struct dsa_mall_tc_entry *mall_tc_entry; 1137 1138 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1139 if (mall_tc_entry->cookie == cookie) 1140 return mall_tc_entry; 1141 1142 return NULL; 1143 } 1144 1145 static int 1146 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 1147 struct tc_cls_matchall_offload *cls, 1148 bool ingress) 1149 { 1150 struct dsa_port *dp = dsa_slave_to_port(dev); 1151 struct dsa_slave_priv *p = netdev_priv(dev); 1152 struct dsa_mall_mirror_tc_entry *mirror; 1153 struct dsa_mall_tc_entry *mall_tc_entry; 1154 struct dsa_switch *ds = dp->ds; 1155 struct flow_action_entry *act; 1156 struct dsa_port *to_dp; 1157 int err; 1158 1159 if (!ds->ops->port_mirror_add) 1160 return -EOPNOTSUPP; 1161 1162 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1163 cls->common.extack)) 1164 return -EOPNOTSUPP; 1165 1166 act = &cls->rule->action.entries[0]; 1167 1168 if (!act->dev) 1169 return -EINVAL; 1170 1171 if (!dsa_slave_dev_check(act->dev)) 1172 return -EOPNOTSUPP; 1173 1174 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1175 if (!mall_tc_entry) 1176 return -ENOMEM; 1177 1178 mall_tc_entry->cookie = cls->cookie; 1179 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1180 mirror = &mall_tc_entry->mirror; 1181 1182 to_dp = dsa_slave_to_port(act->dev); 1183 1184 mirror->to_local_port = to_dp->index; 1185 mirror->ingress = ingress; 1186 1187 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); 1188 if (err) { 1189 kfree(mall_tc_entry); 1190 return err; 1191 } 1192 1193 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1194 1195 return err; 1196 } 1197 1198 static int 1199 dsa_slave_add_cls_matchall_police(struct net_device *dev, 1200 struct tc_cls_matchall_offload *cls, 1201 bool ingress) 1202 { 1203 struct netlink_ext_ack *extack = cls->common.extack; 1204 struct dsa_port *dp = dsa_slave_to_port(dev); 1205 struct dsa_slave_priv *p = netdev_priv(dev); 1206 struct dsa_mall_policer_tc_entry *policer; 1207 struct dsa_mall_tc_entry *mall_tc_entry; 1208 struct dsa_switch *ds = dp->ds; 1209 struct flow_action_entry *act; 1210 int err; 1211 1212 if (!ds->ops->port_policer_add) { 1213 NL_SET_ERR_MSG_MOD(extack, 1214 "Policing offload not implemented"); 1215 return -EOPNOTSUPP; 1216 } 1217 1218 if (!ingress) { 1219 NL_SET_ERR_MSG_MOD(extack, 1220 "Only supported on ingress qdisc"); 1221 return -EOPNOTSUPP; 1222 } 1223 1224 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1225 cls->common.extack)) 1226 return -EOPNOTSUPP; 1227 1228 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1229 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1230 NL_SET_ERR_MSG_MOD(extack, 1231 "Only one port policer allowed"); 1232 return -EEXIST; 1233 } 1234 } 1235 1236 act = &cls->rule->action.entries[0]; 1237 1238 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1239 if (!mall_tc_entry) 1240 return -ENOMEM; 1241 1242 mall_tc_entry->cookie = cls->cookie; 1243 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1244 policer = &mall_tc_entry->policer; 1245 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1246 policer->burst = act->police.burst; 1247 1248 err = ds->ops->port_policer_add(ds, dp->index, policer); 1249 if (err) { 1250 kfree(mall_tc_entry); 1251 return err; 1252 } 1253 1254 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1255 1256 return err; 1257 } 1258 1259 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1260 struct tc_cls_matchall_offload *cls, 1261 bool ingress) 1262 { 1263 int err = -EOPNOTSUPP; 1264 1265 if (cls->common.protocol == htons(ETH_P_ALL) && 1266 flow_offload_has_one_action(&cls->rule->action) && 1267 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1268 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1269 else if (flow_offload_has_one_action(&cls->rule->action) && 1270 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1271 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1272 1273 return err; 1274 } 1275 1276 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1277 struct tc_cls_matchall_offload *cls) 1278 { 1279 struct dsa_port *dp = dsa_slave_to_port(dev); 1280 struct dsa_mall_tc_entry *mall_tc_entry; 1281 struct dsa_switch *ds = dp->ds; 1282 1283 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1284 if (!mall_tc_entry) 1285 return; 1286 1287 list_del(&mall_tc_entry->list); 1288 1289 switch (mall_tc_entry->type) { 1290 case DSA_PORT_MALL_MIRROR: 1291 if (ds->ops->port_mirror_del) 1292 ds->ops->port_mirror_del(ds, dp->index, 1293 &mall_tc_entry->mirror); 1294 break; 1295 case DSA_PORT_MALL_POLICER: 1296 if (ds->ops->port_policer_del) 1297 ds->ops->port_policer_del(ds, dp->index); 1298 break; 1299 default: 1300 WARN_ON(1); 1301 } 1302 1303 kfree(mall_tc_entry); 1304 } 1305 1306 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1307 struct tc_cls_matchall_offload *cls, 1308 bool ingress) 1309 { 1310 if (cls->common.chain_index) 1311 return -EOPNOTSUPP; 1312 1313 switch (cls->command) { 1314 case TC_CLSMATCHALL_REPLACE: 1315 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1316 case TC_CLSMATCHALL_DESTROY: 1317 dsa_slave_del_cls_matchall(dev, cls); 1318 return 0; 1319 default: 1320 return -EOPNOTSUPP; 1321 } 1322 } 1323 1324 static int dsa_slave_add_cls_flower(struct net_device *dev, 1325 struct flow_cls_offload *cls, 1326 bool ingress) 1327 { 1328 struct dsa_port *dp = dsa_slave_to_port(dev); 1329 struct dsa_switch *ds = dp->ds; 1330 int port = dp->index; 1331 1332 if (!ds->ops->cls_flower_add) 1333 return -EOPNOTSUPP; 1334 1335 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1336 } 1337 1338 static int dsa_slave_del_cls_flower(struct net_device *dev, 1339 struct flow_cls_offload *cls, 1340 bool ingress) 1341 { 1342 struct dsa_port *dp = dsa_slave_to_port(dev); 1343 struct dsa_switch *ds = dp->ds; 1344 int port = dp->index; 1345 1346 if (!ds->ops->cls_flower_del) 1347 return -EOPNOTSUPP; 1348 1349 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1350 } 1351 1352 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1353 struct flow_cls_offload *cls, 1354 bool ingress) 1355 { 1356 struct dsa_port *dp = dsa_slave_to_port(dev); 1357 struct dsa_switch *ds = dp->ds; 1358 int port = dp->index; 1359 1360 if (!ds->ops->cls_flower_stats) 1361 return -EOPNOTSUPP; 1362 1363 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1364 } 1365 1366 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1367 struct flow_cls_offload *cls, 1368 bool ingress) 1369 { 1370 switch (cls->command) { 1371 case FLOW_CLS_REPLACE: 1372 return dsa_slave_add_cls_flower(dev, cls, ingress); 1373 case FLOW_CLS_DESTROY: 1374 return dsa_slave_del_cls_flower(dev, cls, ingress); 1375 case FLOW_CLS_STATS: 1376 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1377 default: 1378 return -EOPNOTSUPP; 1379 } 1380 } 1381 1382 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1383 void *cb_priv, bool ingress) 1384 { 1385 struct net_device *dev = cb_priv; 1386 1387 if (!tc_can_offload(dev)) 1388 return -EOPNOTSUPP; 1389 1390 switch (type) { 1391 case TC_SETUP_CLSMATCHALL: 1392 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1393 case TC_SETUP_CLSFLOWER: 1394 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1395 default: 1396 return -EOPNOTSUPP; 1397 } 1398 } 1399 1400 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1401 void *type_data, void *cb_priv) 1402 { 1403 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1404 } 1405 1406 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1407 void *type_data, void *cb_priv) 1408 { 1409 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1410 } 1411 1412 static LIST_HEAD(dsa_slave_block_cb_list); 1413 1414 static int dsa_slave_setup_tc_block(struct net_device *dev, 1415 struct flow_block_offload *f) 1416 { 1417 struct flow_block_cb *block_cb; 1418 flow_setup_cb_t *cb; 1419 1420 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1421 cb = dsa_slave_setup_tc_block_cb_ig; 1422 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1423 cb = dsa_slave_setup_tc_block_cb_eg; 1424 else 1425 return -EOPNOTSUPP; 1426 1427 f->driver_block_list = &dsa_slave_block_cb_list; 1428 1429 switch (f->command) { 1430 case FLOW_BLOCK_BIND: 1431 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1432 return -EBUSY; 1433 1434 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1435 if (IS_ERR(block_cb)) 1436 return PTR_ERR(block_cb); 1437 1438 flow_block_cb_add(block_cb, f); 1439 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1440 return 0; 1441 case FLOW_BLOCK_UNBIND: 1442 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1443 if (!block_cb) 1444 return -ENOENT; 1445 1446 flow_block_cb_remove(block_cb, f); 1447 list_del(&block_cb->driver_list); 1448 return 0; 1449 default: 1450 return -EOPNOTSUPP; 1451 } 1452 } 1453 1454 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port, 1455 void *type_data) 1456 { 1457 struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp; 1458 struct net_device *master = cpu_dp->master; 1459 1460 if (!master->netdev_ops->ndo_setup_tc) 1461 return -EOPNOTSUPP; 1462 1463 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data); 1464 } 1465 1466 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1467 void *type_data) 1468 { 1469 struct dsa_port *dp = dsa_slave_to_port(dev); 1470 struct dsa_switch *ds = dp->ds; 1471 1472 switch (type) { 1473 case TC_SETUP_BLOCK: 1474 return dsa_slave_setup_tc_block(dev, type_data); 1475 case TC_SETUP_FT: 1476 return dsa_slave_setup_ft_block(ds, dp->index, type_data); 1477 default: 1478 break; 1479 } 1480 1481 if (!ds->ops->port_setup_tc) 1482 return -EOPNOTSUPP; 1483 1484 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1485 } 1486 1487 static int dsa_slave_get_rxnfc(struct net_device *dev, 1488 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1489 { 1490 struct dsa_port *dp = dsa_slave_to_port(dev); 1491 struct dsa_switch *ds = dp->ds; 1492 1493 if (!ds->ops->get_rxnfc) 1494 return -EOPNOTSUPP; 1495 1496 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1497 } 1498 1499 static int dsa_slave_set_rxnfc(struct net_device *dev, 1500 struct ethtool_rxnfc *nfc) 1501 { 1502 struct dsa_port *dp = dsa_slave_to_port(dev); 1503 struct dsa_switch *ds = dp->ds; 1504 1505 if (!ds->ops->set_rxnfc) 1506 return -EOPNOTSUPP; 1507 1508 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1509 } 1510 1511 static int dsa_slave_get_ts_info(struct net_device *dev, 1512 struct ethtool_ts_info *ts) 1513 { 1514 struct dsa_slave_priv *p = netdev_priv(dev); 1515 struct dsa_switch *ds = p->dp->ds; 1516 1517 if (!ds->ops->get_ts_info) 1518 return -EOPNOTSUPP; 1519 1520 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1521 } 1522 1523 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1524 u16 vid) 1525 { 1526 struct dsa_port *dp = dsa_slave_to_port(dev); 1527 struct switchdev_obj_port_vlan vlan = { 1528 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1529 .vid = vid, 1530 /* This API only allows programming tagged, non-PVID VIDs */ 1531 .flags = 0, 1532 }; 1533 struct netlink_ext_ack extack = {0}; 1534 int ret; 1535 1536 /* User port... */ 1537 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1538 if (ret) { 1539 if (extack._msg) 1540 netdev_err(dev, "%s\n", extack._msg); 1541 return ret; 1542 } 1543 1544 /* And CPU port... */ 1545 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1546 if (ret) { 1547 if (extack._msg) 1548 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1549 extack._msg); 1550 return ret; 1551 } 1552 1553 return 0; 1554 } 1555 1556 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1557 u16 vid) 1558 { 1559 struct dsa_port *dp = dsa_slave_to_port(dev); 1560 struct switchdev_obj_port_vlan vlan = { 1561 .vid = vid, 1562 /* This API only allows programming tagged, non-PVID VIDs */ 1563 .flags = 0, 1564 }; 1565 int err; 1566 1567 err = dsa_port_vlan_del(dp, &vlan); 1568 if (err) 1569 return err; 1570 1571 return dsa_port_host_vlan_del(dp, &vlan); 1572 } 1573 1574 static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg) 1575 { 1576 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1577 1578 return dsa_slave_vlan_rx_add_vid(arg, proto, vid); 1579 } 1580 1581 static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg) 1582 { 1583 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1584 1585 return dsa_slave_vlan_rx_kill_vid(arg, proto, vid); 1586 } 1587 1588 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1589 * filtering is enabled. The baseline is that only ports that offload a 1590 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1591 * but there are exceptions for quirky hardware. 1592 * 1593 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1594 * the same switch with other ports that offload a VLAN-aware bridge are also 1595 * inevitably VLAN-aware. 1596 * 1597 * To summarize, a DSA switch port offloads: 1598 * 1599 * - If standalone (this includes software bridge, software LAG): 1600 * - if ds->needs_standalone_vlan_filtering = true, OR if 1601 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1602 * this switch chip which have vlan_filtering=1) 1603 * - the 8021q upper VLANs 1604 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1605 * global, or it is, but no port is under a VLAN-aware bridge): 1606 * - no VLAN (any 8021q upper is a software VLAN) 1607 * 1608 * - If under a vlan_filtering=0 bridge which it offload: 1609 * - if ds->configure_vlan_while_not_filtering = true (default): 1610 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1611 * - else (deprecated): 1612 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1613 * enabled, so this behavior is broken and discouraged. 1614 * 1615 * - If under a vlan_filtering=1 bridge which it offload: 1616 * - the bridge VLANs 1617 * - the 8021q upper VLANs 1618 */ 1619 int dsa_slave_manage_vlan_filtering(struct net_device *slave, 1620 bool vlan_filtering) 1621 { 1622 int err; 1623 1624 if (vlan_filtering) { 1625 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1626 1627 err = vlan_for_each(slave, dsa_slave_restore_vlan, slave); 1628 if (err) { 1629 vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1630 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1631 return err; 1632 } 1633 } else { 1634 err = vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1635 if (err) 1636 return err; 1637 1638 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1639 } 1640 1641 return 0; 1642 } 1643 1644 struct dsa_hw_port { 1645 struct list_head list; 1646 struct net_device *dev; 1647 int old_mtu; 1648 }; 1649 1650 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1651 { 1652 const struct dsa_hw_port *p; 1653 int err; 1654 1655 list_for_each_entry(p, hw_port_list, list) { 1656 if (p->dev->mtu == mtu) 1657 continue; 1658 1659 err = dev_set_mtu(p->dev, mtu); 1660 if (err) 1661 goto rollback; 1662 } 1663 1664 return 0; 1665 1666 rollback: 1667 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1668 if (p->dev->mtu == p->old_mtu) 1669 continue; 1670 1671 if (dev_set_mtu(p->dev, p->old_mtu)) 1672 netdev_err(p->dev, "Failed to restore MTU\n"); 1673 } 1674 1675 return err; 1676 } 1677 1678 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1679 { 1680 struct dsa_hw_port *p, *n; 1681 1682 list_for_each_entry_safe(p, n, hw_port_list, list) 1683 kfree(p); 1684 } 1685 1686 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1687 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1688 { 1689 struct list_head hw_port_list; 1690 struct dsa_switch_tree *dst; 1691 int min_mtu = ETH_MAX_MTU; 1692 struct dsa_port *other_dp; 1693 int err; 1694 1695 if (!dp->ds->mtu_enforcement_ingress) 1696 return; 1697 1698 if (!dp->bridge) 1699 return; 1700 1701 INIT_LIST_HEAD(&hw_port_list); 1702 1703 /* Populate the list of ports that are part of the same bridge 1704 * as the newly added/modified port 1705 */ 1706 list_for_each_entry(dst, &dsa_tree_list, list) { 1707 list_for_each_entry(other_dp, &dst->ports, list) { 1708 struct dsa_hw_port *hw_port; 1709 struct net_device *slave; 1710 1711 if (other_dp->type != DSA_PORT_TYPE_USER) 1712 continue; 1713 1714 if (!dsa_port_bridge_same(dp, other_dp)) 1715 continue; 1716 1717 if (!other_dp->ds->mtu_enforcement_ingress) 1718 continue; 1719 1720 slave = other_dp->slave; 1721 1722 if (min_mtu > slave->mtu) 1723 min_mtu = slave->mtu; 1724 1725 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1726 if (!hw_port) 1727 goto out; 1728 1729 hw_port->dev = slave; 1730 hw_port->old_mtu = slave->mtu; 1731 1732 list_add(&hw_port->list, &hw_port_list); 1733 } 1734 } 1735 1736 /* Attempt to configure the entire hardware bridge to the newly added 1737 * interface's MTU first, regardless of whether the intention of the 1738 * user was to raise or lower it. 1739 */ 1740 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1741 if (!err) 1742 goto out; 1743 1744 /* Clearly that didn't work out so well, so just set the minimum MTU on 1745 * all hardware bridge ports now. If this fails too, then all ports will 1746 * still have their old MTU rolled back anyway. 1747 */ 1748 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1749 1750 out: 1751 dsa_hw_port_list_free(&hw_port_list); 1752 } 1753 1754 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1755 { 1756 struct net_device *master = dsa_slave_to_master(dev); 1757 struct dsa_port *dp = dsa_slave_to_port(dev); 1758 struct dsa_slave_priv *p = netdev_priv(dev); 1759 struct dsa_switch *ds = p->dp->ds; 1760 struct dsa_port *dp_iter; 1761 struct dsa_port *cpu_dp; 1762 int port = p->dp->index; 1763 int largest_mtu = 0; 1764 int new_master_mtu; 1765 int old_master_mtu; 1766 int mtu_limit; 1767 int cpu_mtu; 1768 int err; 1769 1770 if (!ds->ops->port_change_mtu) 1771 return -EOPNOTSUPP; 1772 1773 list_for_each_entry(dp_iter, &ds->dst->ports, list) { 1774 int slave_mtu; 1775 1776 if (!dsa_port_is_user(dp_iter)) 1777 continue; 1778 1779 /* During probe, this function will be called for each slave 1780 * device, while not all of them have been allocated. That's 1781 * ok, it doesn't change what the maximum is, so ignore it. 1782 */ 1783 if (!dp_iter->slave) 1784 continue; 1785 1786 /* Pretend that we already applied the setting, which we 1787 * actually haven't (still haven't done all integrity checks) 1788 */ 1789 if (dp_iter == dp) 1790 slave_mtu = new_mtu; 1791 else 1792 slave_mtu = dp_iter->slave->mtu; 1793 1794 if (largest_mtu < slave_mtu) 1795 largest_mtu = slave_mtu; 1796 } 1797 1798 cpu_dp = dsa_to_port(ds, port)->cpu_dp; 1799 1800 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1801 old_master_mtu = master->mtu; 1802 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops); 1803 if (new_master_mtu > mtu_limit) 1804 return -ERANGE; 1805 1806 /* If the master MTU isn't over limit, there's no need to check the CPU 1807 * MTU, since that surely isn't either. 1808 */ 1809 cpu_mtu = largest_mtu; 1810 1811 /* Start applying stuff */ 1812 if (new_master_mtu != old_master_mtu) { 1813 err = dev_set_mtu(master, new_master_mtu); 1814 if (err < 0) 1815 goto out_master_failed; 1816 1817 /* We only need to propagate the MTU of the CPU port to 1818 * upstream switches, so create a non-targeted notifier which 1819 * updates all switches. 1820 */ 1821 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, false); 1822 if (err) 1823 goto out_cpu_failed; 1824 } 1825 1826 err = dsa_port_mtu_change(dp, new_mtu, true); 1827 if (err) 1828 goto out_port_failed; 1829 1830 dev->mtu = new_mtu; 1831 1832 dsa_bridge_mtu_normalization(dp); 1833 1834 return 0; 1835 1836 out_port_failed: 1837 if (new_master_mtu != old_master_mtu) 1838 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1839 dsa_tag_protocol_overhead(cpu_dp->tag_ops), 1840 false); 1841 out_cpu_failed: 1842 if (new_master_mtu != old_master_mtu) 1843 dev_set_mtu(master, old_master_mtu); 1844 out_master_failed: 1845 return err; 1846 } 1847 1848 static const struct ethtool_ops dsa_slave_ethtool_ops = { 1849 .get_drvinfo = dsa_slave_get_drvinfo, 1850 .get_regs_len = dsa_slave_get_regs_len, 1851 .get_regs = dsa_slave_get_regs, 1852 .nway_reset = dsa_slave_nway_reset, 1853 .get_link = ethtool_op_get_link, 1854 .get_eeprom_len = dsa_slave_get_eeprom_len, 1855 .get_eeprom = dsa_slave_get_eeprom, 1856 .set_eeprom = dsa_slave_set_eeprom, 1857 .get_strings = dsa_slave_get_strings, 1858 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 1859 .get_sset_count = dsa_slave_get_sset_count, 1860 .get_eth_phy_stats = dsa_slave_get_eth_phy_stats, 1861 .get_eth_mac_stats = dsa_slave_get_eth_mac_stats, 1862 .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats, 1863 .set_wol = dsa_slave_set_wol, 1864 .get_wol = dsa_slave_get_wol, 1865 .set_eee = dsa_slave_set_eee, 1866 .get_eee = dsa_slave_get_eee, 1867 .get_link_ksettings = dsa_slave_get_link_ksettings, 1868 .set_link_ksettings = dsa_slave_set_link_ksettings, 1869 .get_pauseparam = dsa_slave_get_pauseparam, 1870 .set_pauseparam = dsa_slave_set_pauseparam, 1871 .get_rxnfc = dsa_slave_get_rxnfc, 1872 .set_rxnfc = dsa_slave_set_rxnfc, 1873 .get_ts_info = dsa_slave_get_ts_info, 1874 .self_test = dsa_slave_net_selftest, 1875 }; 1876 1877 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) 1878 { 1879 struct dsa_port *dp = dsa_slave_to_port(dev); 1880 1881 return &dp->devlink_port; 1882 } 1883 1884 static void dsa_slave_get_stats64(struct net_device *dev, 1885 struct rtnl_link_stats64 *s) 1886 { 1887 struct dsa_port *dp = dsa_slave_to_port(dev); 1888 struct dsa_switch *ds = dp->ds; 1889 1890 if (ds->ops->get_stats64) 1891 ds->ops->get_stats64(ds, dp->index, s); 1892 else 1893 dev_get_tstats64(dev, s); 1894 } 1895 1896 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, 1897 struct net_device_path *path) 1898 { 1899 struct dsa_port *dp = dsa_slave_to_port(ctx->dev); 1900 struct dsa_port *cpu_dp = dp->cpu_dp; 1901 1902 path->dev = ctx->dev; 1903 path->type = DEV_PATH_DSA; 1904 path->dsa.proto = cpu_dp->tag_ops->proto; 1905 path->dsa.port = dp->index; 1906 ctx->dev = cpu_dp->master; 1907 1908 return 0; 1909 } 1910 1911 static const struct net_device_ops dsa_slave_netdev_ops = { 1912 .ndo_open = dsa_slave_open, 1913 .ndo_stop = dsa_slave_close, 1914 .ndo_start_xmit = dsa_slave_xmit, 1915 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 1916 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 1917 .ndo_set_mac_address = dsa_slave_set_mac_address, 1918 .ndo_fdb_dump = dsa_slave_fdb_dump, 1919 .ndo_eth_ioctl = dsa_slave_ioctl, 1920 .ndo_get_iflink = dsa_slave_get_iflink, 1921 #ifdef CONFIG_NET_POLL_CONTROLLER 1922 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 1923 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 1924 .ndo_poll_controller = dsa_slave_poll_controller, 1925 #endif 1926 .ndo_setup_tc = dsa_slave_setup_tc, 1927 .ndo_get_stats64 = dsa_slave_get_stats64, 1928 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 1929 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 1930 .ndo_get_devlink_port = dsa_slave_get_devlink_port, 1931 .ndo_change_mtu = dsa_slave_change_mtu, 1932 .ndo_fill_forward_path = dsa_slave_fill_forward_path, 1933 }; 1934 1935 static struct device_type dsa_type = { 1936 .name = "dsa", 1937 }; 1938 1939 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 1940 { 1941 const struct dsa_port *dp = dsa_to_port(ds, port); 1942 1943 if (dp->pl) 1944 phylink_mac_change(dp->pl, up); 1945 } 1946 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 1947 1948 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 1949 struct phylink_link_state *state) 1950 { 1951 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1952 struct dsa_switch *ds = dp->ds; 1953 1954 /* No need to check that this operation is valid, the callback would 1955 * not be called if it was not. 1956 */ 1957 ds->ops->phylink_fixed_state(ds, dp->index, state); 1958 } 1959 1960 /* slave device setup *******************************************************/ 1961 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr, 1962 u32 flags) 1963 { 1964 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1965 struct dsa_switch *ds = dp->ds; 1966 1967 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 1968 if (!slave_dev->phydev) { 1969 netdev_err(slave_dev, "no phy at %d\n", addr); 1970 return -ENODEV; 1971 } 1972 1973 slave_dev->phydev->dev_flags |= flags; 1974 1975 return phylink_connect_phy(dp->pl, slave_dev->phydev); 1976 } 1977 1978 static int dsa_slave_phy_setup(struct net_device *slave_dev) 1979 { 1980 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1981 struct device_node *port_dn = dp->dn; 1982 struct dsa_switch *ds = dp->ds; 1983 u32 phy_flags = 0; 1984 int ret; 1985 1986 dp->pl_config.dev = &slave_dev->dev; 1987 dp->pl_config.type = PHYLINK_NETDEV; 1988 1989 /* The get_fixed_state callback takes precedence over polling the 1990 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 1991 * this if the switch provides such a callback. 1992 */ 1993 if (ds->ops->phylink_fixed_state) { 1994 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 1995 dp->pl_config.poll_fixed_state = true; 1996 } 1997 1998 ret = dsa_port_phylink_create(dp); 1999 if (ret) 2000 return ret; 2001 2002 if (ds->ops->get_phy_flags) 2003 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2004 2005 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2006 if (ret == -ENODEV && ds->slave_mii_bus) { 2007 /* We could not connect to a designated PHY or SFP, so try to 2008 * use the switch internal MDIO bus instead 2009 */ 2010 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags); 2011 } 2012 if (ret) { 2013 netdev_err(slave_dev, "failed to connect to PHY: %pe\n", 2014 ERR_PTR(ret)); 2015 phylink_destroy(dp->pl); 2016 } 2017 2018 return ret; 2019 } 2020 2021 void dsa_slave_setup_tagger(struct net_device *slave) 2022 { 2023 struct dsa_port *dp = dsa_slave_to_port(slave); 2024 struct dsa_slave_priv *p = netdev_priv(slave); 2025 const struct dsa_port *cpu_dp = dp->cpu_dp; 2026 struct net_device *master = cpu_dp->master; 2027 const struct dsa_switch *ds = dp->ds; 2028 2029 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2030 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2031 /* Try to save one extra realloc later in the TX path (in the master) 2032 * by also inheriting the master's needed headroom and tailroom. 2033 * The 8021q driver also does this. 2034 */ 2035 slave->needed_headroom += master->needed_headroom; 2036 slave->needed_tailroom += master->needed_tailroom; 2037 2038 p->xmit = cpu_dp->tag_ops->xmit; 2039 2040 slave->features = master->vlan_features | NETIF_F_HW_TC; 2041 slave->hw_features |= NETIF_F_HW_TC; 2042 slave->features |= NETIF_F_LLTX; 2043 if (slave->needed_tailroom) 2044 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2045 if (ds->needs_standalone_vlan_filtering) 2046 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2047 } 2048 2049 int dsa_slave_suspend(struct net_device *slave_dev) 2050 { 2051 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2052 2053 if (!netif_running(slave_dev)) 2054 return 0; 2055 2056 netif_device_detach(slave_dev); 2057 2058 rtnl_lock(); 2059 phylink_stop(dp->pl); 2060 rtnl_unlock(); 2061 2062 return 0; 2063 } 2064 2065 int dsa_slave_resume(struct net_device *slave_dev) 2066 { 2067 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2068 2069 if (!netif_running(slave_dev)) 2070 return 0; 2071 2072 netif_device_attach(slave_dev); 2073 2074 rtnl_lock(); 2075 phylink_start(dp->pl); 2076 rtnl_unlock(); 2077 2078 return 0; 2079 } 2080 2081 int dsa_slave_create(struct dsa_port *port) 2082 { 2083 const struct dsa_port *cpu_dp = port->cpu_dp; 2084 struct net_device *master = cpu_dp->master; 2085 struct dsa_switch *ds = port->ds; 2086 const char *name = port->name; 2087 struct net_device *slave_dev; 2088 struct dsa_slave_priv *p; 2089 int ret; 2090 2091 if (!ds->num_tx_queues) 2092 ds->num_tx_queues = 1; 2093 2094 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 2095 NET_NAME_UNKNOWN, ether_setup, 2096 ds->num_tx_queues, 1); 2097 if (slave_dev == NULL) 2098 return -ENOMEM; 2099 2100 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 2101 if (!is_zero_ether_addr(port->mac)) 2102 eth_hw_addr_set(slave_dev, port->mac); 2103 else 2104 eth_hw_addr_inherit(slave_dev, master); 2105 slave_dev->priv_flags |= IFF_NO_QUEUE; 2106 if (dsa_switch_supports_uc_filtering(ds)) 2107 slave_dev->priv_flags |= IFF_UNICAST_FLT; 2108 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 2109 if (ds->ops->port_max_mtu) 2110 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2111 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 2112 2113 SET_NETDEV_DEV(slave_dev, port->ds->dev); 2114 slave_dev->dev.of_node = port->dn; 2115 slave_dev->vlan_features = master->vlan_features; 2116 2117 p = netdev_priv(slave_dev); 2118 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2119 if (!slave_dev->tstats) { 2120 free_netdev(slave_dev); 2121 return -ENOMEM; 2122 } 2123 2124 ret = gro_cells_init(&p->gcells, slave_dev); 2125 if (ret) 2126 goto out_free; 2127 2128 p->dp = port; 2129 INIT_LIST_HEAD(&p->mall_tc_list); 2130 port->slave = slave_dev; 2131 dsa_slave_setup_tagger(slave_dev); 2132 2133 netif_carrier_off(slave_dev); 2134 2135 ret = dsa_slave_phy_setup(slave_dev); 2136 if (ret) { 2137 netdev_err(slave_dev, 2138 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2139 ret, ds->dst->index, ds->index, port->index); 2140 goto out_gcells; 2141 } 2142 2143 rtnl_lock(); 2144 2145 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 2146 if (ret && ret != -EOPNOTSUPP) 2147 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2148 ret, ETH_DATA_LEN, port->index); 2149 2150 ret = register_netdevice(slave_dev); 2151 if (ret) { 2152 netdev_err(master, "error %d registering interface %s\n", 2153 ret, slave_dev->name); 2154 rtnl_unlock(); 2155 goto out_phy; 2156 } 2157 2158 ret = netdev_upper_dev_link(master, slave_dev, NULL); 2159 2160 rtnl_unlock(); 2161 2162 if (ret) 2163 goto out_unregister; 2164 2165 return 0; 2166 2167 out_unregister: 2168 unregister_netdev(slave_dev); 2169 out_phy: 2170 rtnl_lock(); 2171 phylink_disconnect_phy(p->dp->pl); 2172 rtnl_unlock(); 2173 phylink_destroy(p->dp->pl); 2174 out_gcells: 2175 gro_cells_destroy(&p->gcells); 2176 out_free: 2177 free_percpu(slave_dev->tstats); 2178 free_netdev(slave_dev); 2179 port->slave = NULL; 2180 return ret; 2181 } 2182 2183 void dsa_slave_destroy(struct net_device *slave_dev) 2184 { 2185 struct net_device *master = dsa_slave_to_master(slave_dev); 2186 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2187 struct dsa_slave_priv *p = netdev_priv(slave_dev); 2188 2189 netif_carrier_off(slave_dev); 2190 rtnl_lock(); 2191 netdev_upper_dev_unlink(master, slave_dev); 2192 unregister_netdevice(slave_dev); 2193 phylink_disconnect_phy(dp->pl); 2194 rtnl_unlock(); 2195 2196 phylink_destroy(dp->pl); 2197 gro_cells_destroy(&p->gcells); 2198 free_percpu(slave_dev->tstats); 2199 free_netdev(slave_dev); 2200 } 2201 2202 bool dsa_slave_dev_check(const struct net_device *dev) 2203 { 2204 return dev->netdev_ops == &dsa_slave_netdev_ops; 2205 } 2206 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 2207 2208 static int dsa_slave_changeupper(struct net_device *dev, 2209 struct netdev_notifier_changeupper_info *info) 2210 { 2211 struct dsa_port *dp = dsa_slave_to_port(dev); 2212 struct netlink_ext_ack *extack; 2213 int err = NOTIFY_DONE; 2214 2215 extack = netdev_notifier_info_to_extack(&info->info); 2216 2217 if (netif_is_bridge_master(info->upper_dev)) { 2218 if (info->linking) { 2219 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2220 if (!err) 2221 dsa_bridge_mtu_normalization(dp); 2222 if (err == -EOPNOTSUPP) { 2223 NL_SET_ERR_MSG_MOD(extack, 2224 "Offloading not supported"); 2225 err = 0; 2226 } 2227 err = notifier_from_errno(err); 2228 } else { 2229 dsa_port_bridge_leave(dp, info->upper_dev); 2230 err = NOTIFY_OK; 2231 } 2232 } else if (netif_is_lag_master(info->upper_dev)) { 2233 if (info->linking) { 2234 err = dsa_port_lag_join(dp, info->upper_dev, 2235 info->upper_info, extack); 2236 if (err == -EOPNOTSUPP) { 2237 NL_SET_ERR_MSG_MOD(info->info.extack, 2238 "Offloading not supported"); 2239 err = 0; 2240 } 2241 err = notifier_from_errno(err); 2242 } else { 2243 dsa_port_lag_leave(dp, info->upper_dev); 2244 err = NOTIFY_OK; 2245 } 2246 } else if (is_hsr_master(info->upper_dev)) { 2247 if (info->linking) { 2248 err = dsa_port_hsr_join(dp, info->upper_dev); 2249 if (err == -EOPNOTSUPP) { 2250 NL_SET_ERR_MSG_MOD(info->info.extack, 2251 "Offloading not supported"); 2252 err = 0; 2253 } 2254 err = notifier_from_errno(err); 2255 } else { 2256 dsa_port_hsr_leave(dp, info->upper_dev); 2257 err = NOTIFY_OK; 2258 } 2259 } 2260 2261 return err; 2262 } 2263 2264 static int dsa_slave_prechangeupper(struct net_device *dev, 2265 struct netdev_notifier_changeupper_info *info) 2266 { 2267 struct dsa_port *dp = dsa_slave_to_port(dev); 2268 2269 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2270 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2271 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2272 dsa_port_pre_lag_leave(dp, info->upper_dev); 2273 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be 2274 * meaningfully enslaved to a bridge yet 2275 */ 2276 2277 return NOTIFY_DONE; 2278 } 2279 2280 static int 2281 dsa_slave_lag_changeupper(struct net_device *dev, 2282 struct netdev_notifier_changeupper_info *info) 2283 { 2284 struct net_device *lower; 2285 struct list_head *iter; 2286 int err = NOTIFY_DONE; 2287 struct dsa_port *dp; 2288 2289 netdev_for_each_lower_dev(dev, lower, iter) { 2290 if (!dsa_slave_dev_check(lower)) 2291 continue; 2292 2293 dp = dsa_slave_to_port(lower); 2294 if (!dp->lag) 2295 /* Software LAG */ 2296 continue; 2297 2298 err = dsa_slave_changeupper(lower, info); 2299 if (notifier_to_errno(err)) 2300 break; 2301 } 2302 2303 return err; 2304 } 2305 2306 /* Same as dsa_slave_lag_changeupper() except that it calls 2307 * dsa_slave_prechangeupper() 2308 */ 2309 static int 2310 dsa_slave_lag_prechangeupper(struct net_device *dev, 2311 struct netdev_notifier_changeupper_info *info) 2312 { 2313 struct net_device *lower; 2314 struct list_head *iter; 2315 int err = NOTIFY_DONE; 2316 struct dsa_port *dp; 2317 2318 netdev_for_each_lower_dev(dev, lower, iter) { 2319 if (!dsa_slave_dev_check(lower)) 2320 continue; 2321 2322 dp = dsa_slave_to_port(lower); 2323 if (!dp->lag) 2324 /* Software LAG */ 2325 continue; 2326 2327 err = dsa_slave_prechangeupper(lower, info); 2328 if (notifier_to_errno(err)) 2329 break; 2330 } 2331 2332 return err; 2333 } 2334 2335 static int 2336 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 2337 struct netdev_notifier_changeupper_info *info) 2338 { 2339 struct netlink_ext_ack *ext_ack; 2340 struct net_device *slave, *br; 2341 struct dsa_port *dp; 2342 2343 ext_ack = netdev_notifier_info_to_extack(&info->info); 2344 2345 if (!is_vlan_dev(dev)) 2346 return NOTIFY_DONE; 2347 2348 slave = vlan_dev_real_dev(dev); 2349 if (!dsa_slave_dev_check(slave)) 2350 return NOTIFY_DONE; 2351 2352 dp = dsa_slave_to_port(slave); 2353 br = dsa_port_bridge_dev_get(dp); 2354 if (!br) 2355 return NOTIFY_DONE; 2356 2357 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 2358 if (br_vlan_enabled(br) && 2359 netif_is_bridge_master(info->upper_dev) && info->linking) { 2360 NL_SET_ERR_MSG_MOD(ext_ack, 2361 "Cannot enslave VLAN device into VLAN aware bridge"); 2362 return notifier_from_errno(-EINVAL); 2363 } 2364 2365 return NOTIFY_DONE; 2366 } 2367 2368 static int 2369 dsa_slave_check_8021q_upper(struct net_device *dev, 2370 struct netdev_notifier_changeupper_info *info) 2371 { 2372 struct dsa_port *dp = dsa_slave_to_port(dev); 2373 struct net_device *br = dsa_port_bridge_dev_get(dp); 2374 struct bridge_vlan_info br_info; 2375 struct netlink_ext_ack *extack; 2376 int err = NOTIFY_DONE; 2377 u16 vid; 2378 2379 if (!br || !br_vlan_enabled(br)) 2380 return NOTIFY_DONE; 2381 2382 extack = netdev_notifier_info_to_extack(&info->info); 2383 vid = vlan_dev_vlan_id(info->upper_dev); 2384 2385 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2386 * device, respectively the VID is not found, returning 2387 * 0 means success, which is a failure for us here. 2388 */ 2389 err = br_vlan_get_info(br, vid, &br_info); 2390 if (err == 0) { 2391 NL_SET_ERR_MSG_MOD(extack, 2392 "This VLAN is already configured by the bridge"); 2393 return notifier_from_errno(-EBUSY); 2394 } 2395 2396 return NOTIFY_DONE; 2397 } 2398 2399 static int 2400 dsa_slave_prechangeupper_sanity_check(struct net_device *dev, 2401 struct netdev_notifier_changeupper_info *info) 2402 { 2403 struct dsa_switch *ds; 2404 struct dsa_port *dp; 2405 int err; 2406 2407 if (!dsa_slave_dev_check(dev)) 2408 return dsa_prevent_bridging_8021q_upper(dev, info); 2409 2410 dp = dsa_slave_to_port(dev); 2411 ds = dp->ds; 2412 2413 if (ds->ops->port_prechangeupper) { 2414 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2415 if (err) 2416 return notifier_from_errno(err); 2417 } 2418 2419 if (is_vlan_dev(info->upper_dev)) 2420 return dsa_slave_check_8021q_upper(dev, info); 2421 2422 return NOTIFY_DONE; 2423 } 2424 2425 static int dsa_slave_netdevice_event(struct notifier_block *nb, 2426 unsigned long event, void *ptr) 2427 { 2428 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2429 2430 switch (event) { 2431 case NETDEV_PRECHANGEUPPER: { 2432 struct netdev_notifier_changeupper_info *info = ptr; 2433 int err; 2434 2435 err = dsa_slave_prechangeupper_sanity_check(dev, info); 2436 if (err != NOTIFY_DONE) 2437 return err; 2438 2439 if (dsa_slave_dev_check(dev)) 2440 return dsa_slave_prechangeupper(dev, ptr); 2441 2442 if (netif_is_lag_master(dev)) 2443 return dsa_slave_lag_prechangeupper(dev, ptr); 2444 2445 break; 2446 } 2447 case NETDEV_CHANGEUPPER: 2448 if (dsa_slave_dev_check(dev)) 2449 return dsa_slave_changeupper(dev, ptr); 2450 2451 if (netif_is_lag_master(dev)) 2452 return dsa_slave_lag_changeupper(dev, ptr); 2453 2454 break; 2455 case NETDEV_CHANGELOWERSTATE: { 2456 struct netdev_notifier_changelowerstate_info *info = ptr; 2457 struct dsa_port *dp; 2458 int err; 2459 2460 if (!dsa_slave_dev_check(dev)) 2461 break; 2462 2463 dp = dsa_slave_to_port(dev); 2464 2465 err = dsa_port_lag_change(dp, info->lower_state_info); 2466 return notifier_from_errno(err); 2467 } 2468 case NETDEV_CHANGE: 2469 case NETDEV_UP: { 2470 /* Track state of master port. 2471 * DSA driver may require the master port (and indirectly 2472 * the tagger) to be available for some special operation. 2473 */ 2474 if (netdev_uses_dsa(dev)) { 2475 struct dsa_port *cpu_dp = dev->dsa_ptr; 2476 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 2477 2478 /* Track when the master port is UP */ 2479 dsa_tree_master_oper_state_change(dst, dev, 2480 netif_oper_up(dev)); 2481 2482 /* Track when the master port is ready and can accept 2483 * packet. 2484 * NETDEV_UP event is not enough to flag a port as ready. 2485 * We also have to wait for linkwatch_do_dev to dev_activate 2486 * and emit a NETDEV_CHANGE event. 2487 * We check if a master port is ready by checking if the dev 2488 * have a qdisc assigned and is not noop. 2489 */ 2490 dsa_tree_master_admin_state_change(dst, dev, 2491 !qdisc_tx_is_noop(dev)); 2492 2493 return NOTIFY_OK; 2494 } 2495 2496 return NOTIFY_DONE; 2497 } 2498 case NETDEV_GOING_DOWN: { 2499 struct dsa_port *dp, *cpu_dp; 2500 struct dsa_switch_tree *dst; 2501 LIST_HEAD(close_list); 2502 2503 if (!netdev_uses_dsa(dev)) 2504 return NOTIFY_DONE; 2505 2506 cpu_dp = dev->dsa_ptr; 2507 dst = cpu_dp->ds->dst; 2508 2509 dsa_tree_master_admin_state_change(dst, dev, false); 2510 2511 list_for_each_entry(dp, &dst->ports, list) { 2512 if (!dsa_port_is_user(dp)) 2513 continue; 2514 2515 list_add(&dp->slave->close_list, &close_list); 2516 } 2517 2518 dev_close_many(&close_list, true); 2519 2520 return NOTIFY_OK; 2521 } 2522 default: 2523 break; 2524 } 2525 2526 return NOTIFY_DONE; 2527 } 2528 2529 static void 2530 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 2531 { 2532 struct switchdev_notifier_fdb_info info = {}; 2533 2534 info.addr = switchdev_work->addr; 2535 info.vid = switchdev_work->vid; 2536 info.offloaded = true; 2537 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 2538 switchdev_work->orig_dev, &info.info, NULL); 2539 } 2540 2541 static void dsa_slave_switchdev_event_work(struct work_struct *work) 2542 { 2543 struct dsa_switchdev_event_work *switchdev_work = 2544 container_of(work, struct dsa_switchdev_event_work, work); 2545 const unsigned char *addr = switchdev_work->addr; 2546 struct net_device *dev = switchdev_work->dev; 2547 u16 vid = switchdev_work->vid; 2548 struct dsa_switch *ds; 2549 struct dsa_port *dp; 2550 int err; 2551 2552 dp = dsa_slave_to_port(dev); 2553 ds = dp->ds; 2554 2555 switch (switchdev_work->event) { 2556 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2557 if (switchdev_work->host_addr) 2558 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 2559 else if (dp->lag) 2560 err = dsa_port_lag_fdb_add(dp, addr, vid); 2561 else 2562 err = dsa_port_fdb_add(dp, addr, vid); 2563 if (err) { 2564 dev_err(ds->dev, 2565 "port %d failed to add %pM vid %d to fdb: %d\n", 2566 dp->index, addr, vid, err); 2567 break; 2568 } 2569 dsa_fdb_offload_notify(switchdev_work); 2570 break; 2571 2572 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2573 if (switchdev_work->host_addr) 2574 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 2575 else if (dp->lag) 2576 err = dsa_port_lag_fdb_del(dp, addr, vid); 2577 else 2578 err = dsa_port_fdb_del(dp, addr, vid); 2579 if (err) { 2580 dev_err(ds->dev, 2581 "port %d failed to delete %pM vid %d from fdb: %d\n", 2582 dp->index, addr, vid, err); 2583 } 2584 2585 break; 2586 } 2587 2588 kfree(switchdev_work); 2589 } 2590 2591 static bool dsa_foreign_dev_check(const struct net_device *dev, 2592 const struct net_device *foreign_dev) 2593 { 2594 const struct dsa_port *dp = dsa_slave_to_port(dev); 2595 struct dsa_switch_tree *dst = dp->ds->dst; 2596 2597 if (netif_is_bridge_master(foreign_dev)) 2598 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 2599 2600 if (netif_is_bridge_port(foreign_dev)) 2601 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 2602 2603 /* Everything else is foreign */ 2604 return true; 2605 } 2606 2607 static int dsa_slave_fdb_event(struct net_device *dev, 2608 struct net_device *orig_dev, 2609 unsigned long event, const void *ctx, 2610 const struct switchdev_notifier_fdb_info *fdb_info) 2611 { 2612 struct dsa_switchdev_event_work *switchdev_work; 2613 struct dsa_port *dp = dsa_slave_to_port(dev); 2614 bool host_addr = fdb_info->is_local; 2615 struct dsa_switch *ds = dp->ds; 2616 2617 if (ctx && ctx != dp) 2618 return 0; 2619 2620 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 2621 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 2622 return 0; 2623 2624 /* FDB entries learned by the software bridge or by foreign 2625 * bridge ports should be installed as host addresses only if 2626 * the driver requests assisted learning. 2627 */ 2628 if (!ds->assisted_learning_on_cpu_port) 2629 return 0; 2630 } 2631 2632 /* Also treat FDB entries on foreign interfaces bridged with us as host 2633 * addresses. 2634 */ 2635 if (dsa_foreign_dev_check(dev, orig_dev)) 2636 host_addr = true; 2637 2638 /* Check early that we're not doing work in vain. 2639 * Host addresses on LAG ports still require regular FDB ops, 2640 * since the CPU port isn't in a LAG. 2641 */ 2642 if (dp->lag && !host_addr) { 2643 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 2644 return -EOPNOTSUPP; 2645 } else { 2646 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 2647 return -EOPNOTSUPP; 2648 } 2649 2650 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 2651 if (!switchdev_work) 2652 return -ENOMEM; 2653 2654 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 2655 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 2656 orig_dev->name, fdb_info->addr, fdb_info->vid, 2657 host_addr ? " as host address" : ""); 2658 2659 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work); 2660 switchdev_work->event = event; 2661 switchdev_work->dev = dev; 2662 switchdev_work->orig_dev = orig_dev; 2663 2664 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 2665 switchdev_work->vid = fdb_info->vid; 2666 switchdev_work->host_addr = host_addr; 2667 2668 dsa_schedule_work(&switchdev_work->work); 2669 2670 return 0; 2671 } 2672 2673 /* Called under rcu_read_lock() */ 2674 static int dsa_slave_switchdev_event(struct notifier_block *unused, 2675 unsigned long event, void *ptr) 2676 { 2677 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2678 int err; 2679 2680 switch (event) { 2681 case SWITCHDEV_PORT_ATTR_SET: 2682 err = switchdev_handle_port_attr_set(dev, ptr, 2683 dsa_slave_dev_check, 2684 dsa_slave_port_attr_set); 2685 return notifier_from_errno(err); 2686 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2687 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2688 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 2689 dsa_slave_dev_check, 2690 dsa_foreign_dev_check, 2691 dsa_slave_fdb_event); 2692 return notifier_from_errno(err); 2693 default: 2694 return NOTIFY_DONE; 2695 } 2696 2697 return NOTIFY_OK; 2698 } 2699 2700 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 2701 unsigned long event, void *ptr) 2702 { 2703 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2704 int err; 2705 2706 switch (event) { 2707 case SWITCHDEV_PORT_OBJ_ADD: 2708 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 2709 dsa_slave_dev_check, 2710 dsa_foreign_dev_check, 2711 dsa_slave_port_obj_add); 2712 return notifier_from_errno(err); 2713 case SWITCHDEV_PORT_OBJ_DEL: 2714 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 2715 dsa_slave_dev_check, 2716 dsa_foreign_dev_check, 2717 dsa_slave_port_obj_del); 2718 return notifier_from_errno(err); 2719 case SWITCHDEV_PORT_ATTR_SET: 2720 err = switchdev_handle_port_attr_set(dev, ptr, 2721 dsa_slave_dev_check, 2722 dsa_slave_port_attr_set); 2723 return notifier_from_errno(err); 2724 } 2725 2726 return NOTIFY_DONE; 2727 } 2728 2729 static struct notifier_block dsa_slave_nb __read_mostly = { 2730 .notifier_call = dsa_slave_netdevice_event, 2731 }; 2732 2733 struct notifier_block dsa_slave_switchdev_notifier = { 2734 .notifier_call = dsa_slave_switchdev_event, 2735 }; 2736 2737 struct notifier_block dsa_slave_switchdev_blocking_notifier = { 2738 .notifier_call = dsa_slave_switchdev_blocking_event, 2739 }; 2740 2741 int dsa_slave_register_notifier(void) 2742 { 2743 struct notifier_block *nb; 2744 int err; 2745 2746 err = register_netdevice_notifier(&dsa_slave_nb); 2747 if (err) 2748 return err; 2749 2750 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 2751 if (err) 2752 goto err_switchdev_nb; 2753 2754 nb = &dsa_slave_switchdev_blocking_notifier; 2755 err = register_switchdev_blocking_notifier(nb); 2756 if (err) 2757 goto err_switchdev_blocking_nb; 2758 2759 return 0; 2760 2761 err_switchdev_blocking_nb: 2762 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2763 err_switchdev_nb: 2764 unregister_netdevice_notifier(&dsa_slave_nb); 2765 return err; 2766 } 2767 2768 void dsa_slave_unregister_notifier(void) 2769 { 2770 struct notifier_block *nb; 2771 int err; 2772 2773 nb = &dsa_slave_switchdev_blocking_notifier; 2774 err = unregister_switchdev_blocking_notifier(nb); 2775 if (err) 2776 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 2777 2778 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2779 if (err) 2780 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 2781 2782 err = unregister_netdevice_notifier(&dsa_slave_nb); 2783 if (err) 2784 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 2785 } 2786