1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/dsa/slave.c - Slave device handling 4 * Copyright (c) 2008-2009 Marvell Semiconductor 5 */ 6 7 #include <linux/list.h> 8 #include <linux/etherdevice.h> 9 #include <linux/netdevice.h> 10 #include <linux/phy.h> 11 #include <linux/phy_fixed.h> 12 #include <linux/phylink.h> 13 #include <linux/of_net.h> 14 #include <linux/of_mdio.h> 15 #include <linux/mdio.h> 16 #include <net/rtnetlink.h> 17 #include <net/pkt_cls.h> 18 #include <net/selftests.h> 19 #include <net/tc_act/tc_mirred.h> 20 #include <linux/if_bridge.h> 21 #include <linux/if_hsr.h> 22 #include <net/dcbnl.h> 23 #include <linux/netpoll.h> 24 25 #include "dsa_priv.h" 26 27 static void dsa_slave_standalone_event_work(struct work_struct *work) 28 { 29 struct dsa_standalone_event_work *standalone_work = 30 container_of(work, struct dsa_standalone_event_work, work); 31 const unsigned char *addr = standalone_work->addr; 32 struct net_device *dev = standalone_work->dev; 33 struct dsa_port *dp = dsa_slave_to_port(dev); 34 struct switchdev_obj_port_mdb mdb; 35 struct dsa_switch *ds = dp->ds; 36 u16 vid = standalone_work->vid; 37 int err; 38 39 switch (standalone_work->event) { 40 case DSA_UC_ADD: 41 err = dsa_port_standalone_host_fdb_add(dp, addr, vid); 42 if (err) { 43 dev_err(ds->dev, 44 "port %d failed to add %pM vid %d to fdb: %d\n", 45 dp->index, addr, vid, err); 46 break; 47 } 48 break; 49 50 case DSA_UC_DEL: 51 err = dsa_port_standalone_host_fdb_del(dp, addr, vid); 52 if (err) { 53 dev_err(ds->dev, 54 "port %d failed to delete %pM vid %d from fdb: %d\n", 55 dp->index, addr, vid, err); 56 } 57 58 break; 59 case DSA_MC_ADD: 60 ether_addr_copy(mdb.addr, addr); 61 mdb.vid = vid; 62 63 err = dsa_port_standalone_host_mdb_add(dp, &mdb); 64 if (err) { 65 dev_err(ds->dev, 66 "port %d failed to add %pM vid %d to mdb: %d\n", 67 dp->index, addr, vid, err); 68 break; 69 } 70 break; 71 case DSA_MC_DEL: 72 ether_addr_copy(mdb.addr, addr); 73 mdb.vid = vid; 74 75 err = dsa_port_standalone_host_mdb_del(dp, &mdb); 76 if (err) { 77 dev_err(ds->dev, 78 "port %d failed to delete %pM vid %d from mdb: %d\n", 79 dp->index, addr, vid, err); 80 } 81 82 break; 83 } 84 85 kfree(standalone_work); 86 } 87 88 static int dsa_slave_schedule_standalone_work(struct net_device *dev, 89 enum dsa_standalone_event event, 90 const unsigned char *addr, 91 u16 vid) 92 { 93 struct dsa_standalone_event_work *standalone_work; 94 95 standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC); 96 if (!standalone_work) 97 return -ENOMEM; 98 99 INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work); 100 standalone_work->event = event; 101 standalone_work->dev = dev; 102 103 ether_addr_copy(standalone_work->addr, addr); 104 standalone_work->vid = vid; 105 106 dsa_schedule_work(&standalone_work->work); 107 108 return 0; 109 } 110 111 static int dsa_slave_sync_uc(struct net_device *dev, 112 const unsigned char *addr) 113 { 114 struct net_device *master = dsa_slave_to_master(dev); 115 struct dsa_port *dp = dsa_slave_to_port(dev); 116 117 dev_uc_add(master, addr); 118 119 if (!dsa_switch_supports_uc_filtering(dp->ds)) 120 return 0; 121 122 return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0); 123 } 124 125 static int dsa_slave_unsync_uc(struct net_device *dev, 126 const unsigned char *addr) 127 { 128 struct net_device *master = dsa_slave_to_master(dev); 129 struct dsa_port *dp = dsa_slave_to_port(dev); 130 131 dev_uc_del(master, addr); 132 133 if (!dsa_switch_supports_uc_filtering(dp->ds)) 134 return 0; 135 136 return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0); 137 } 138 139 static int dsa_slave_sync_mc(struct net_device *dev, 140 const unsigned char *addr) 141 { 142 struct net_device *master = dsa_slave_to_master(dev); 143 struct dsa_port *dp = dsa_slave_to_port(dev); 144 145 dev_mc_add(master, addr); 146 147 if (!dsa_switch_supports_mc_filtering(dp->ds)) 148 return 0; 149 150 return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0); 151 } 152 153 static int dsa_slave_unsync_mc(struct net_device *dev, 154 const unsigned char *addr) 155 { 156 struct net_device *master = dsa_slave_to_master(dev); 157 struct dsa_port *dp = dsa_slave_to_port(dev); 158 159 dev_mc_del(master, addr); 160 161 if (!dsa_switch_supports_mc_filtering(dp->ds)) 162 return 0; 163 164 return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0); 165 } 166 167 /* slave mii_bus handling ***************************************************/ 168 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 169 { 170 struct dsa_switch *ds = bus->priv; 171 172 if (ds->phys_mii_mask & (1 << addr)) 173 return ds->ops->phy_read(ds, addr, reg); 174 175 return 0xffff; 176 } 177 178 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 179 { 180 struct dsa_switch *ds = bus->priv; 181 182 if (ds->phys_mii_mask & (1 << addr)) 183 return ds->ops->phy_write(ds, addr, reg, val); 184 185 return 0; 186 } 187 188 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 189 { 190 ds->slave_mii_bus->priv = (void *)ds; 191 ds->slave_mii_bus->name = "dsa slave smi"; 192 ds->slave_mii_bus->read = dsa_slave_phy_read; 193 ds->slave_mii_bus->write = dsa_slave_phy_write; 194 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 195 ds->dst->index, ds->index); 196 ds->slave_mii_bus->parent = ds->dev; 197 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 198 } 199 200 201 /* slave device handling ****************************************************/ 202 static int dsa_slave_get_iflink(const struct net_device *dev) 203 { 204 return dsa_slave_to_master(dev)->ifindex; 205 } 206 207 static int dsa_slave_open(struct net_device *dev) 208 { 209 struct net_device *master = dsa_slave_to_master(dev); 210 struct dsa_port *dp = dsa_slave_to_port(dev); 211 struct dsa_switch *ds = dp->ds; 212 int err; 213 214 err = dev_open(master, NULL); 215 if (err < 0) { 216 netdev_err(dev, "failed to open master %s\n", master->name); 217 goto out; 218 } 219 220 if (dsa_switch_supports_uc_filtering(ds)) { 221 err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0); 222 if (err) 223 goto out; 224 } 225 226 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 227 err = dev_uc_add(master, dev->dev_addr); 228 if (err < 0) 229 goto del_host_addr; 230 } 231 232 err = dsa_port_enable_rt(dp, dev->phydev); 233 if (err) 234 goto del_unicast; 235 236 return 0; 237 238 del_unicast: 239 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 240 dev_uc_del(master, dev->dev_addr); 241 del_host_addr: 242 if (dsa_switch_supports_uc_filtering(ds)) 243 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 244 out: 245 return err; 246 } 247 248 static int dsa_slave_close(struct net_device *dev) 249 { 250 struct net_device *master = dsa_slave_to_master(dev); 251 struct dsa_port *dp = dsa_slave_to_port(dev); 252 struct dsa_switch *ds = dp->ds; 253 254 dsa_port_disable_rt(dp); 255 256 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 257 dev_uc_del(master, dev->dev_addr); 258 259 if (dsa_switch_supports_uc_filtering(ds)) 260 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 261 262 return 0; 263 } 264 265 static void dsa_slave_manage_host_flood(struct net_device *dev) 266 { 267 bool mc = dev->flags & (IFF_PROMISC | IFF_ALLMULTI); 268 struct dsa_port *dp = dsa_slave_to_port(dev); 269 bool uc = dev->flags & IFF_PROMISC; 270 271 dsa_port_set_host_flood(dp, uc, mc); 272 } 273 274 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 275 { 276 struct net_device *master = dsa_slave_to_master(dev); 277 struct dsa_port *dp = dsa_slave_to_port(dev); 278 struct dsa_switch *ds = dp->ds; 279 280 if (change & IFF_ALLMULTI) 281 dev_set_allmulti(master, 282 dev->flags & IFF_ALLMULTI ? 1 : -1); 283 if (change & IFF_PROMISC) 284 dev_set_promiscuity(master, 285 dev->flags & IFF_PROMISC ? 1 : -1); 286 287 if (dsa_switch_supports_uc_filtering(ds) && 288 dsa_switch_supports_mc_filtering(ds)) 289 dsa_slave_manage_host_flood(dev); 290 } 291 292 static void dsa_slave_set_rx_mode(struct net_device *dev) 293 { 294 __dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc); 295 __dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc); 296 } 297 298 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 299 { 300 struct net_device *master = dsa_slave_to_master(dev); 301 struct dsa_port *dp = dsa_slave_to_port(dev); 302 struct dsa_switch *ds = dp->ds; 303 struct sockaddr *addr = a; 304 int err; 305 306 if (!is_valid_ether_addr(addr->sa_data)) 307 return -EADDRNOTAVAIL; 308 309 /* If the port is down, the address isn't synced yet to hardware or 310 * to the DSA master, so there is nothing to change. 311 */ 312 if (!(dev->flags & IFF_UP)) 313 goto out_change_dev_addr; 314 315 if (dsa_switch_supports_uc_filtering(ds)) { 316 err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0); 317 if (err) 318 return err; 319 } 320 321 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 322 err = dev_uc_add(master, addr->sa_data); 323 if (err < 0) 324 goto del_unicast; 325 } 326 327 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 328 dev_uc_del(master, dev->dev_addr); 329 330 if (dsa_switch_supports_uc_filtering(ds)) 331 dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0); 332 333 out_change_dev_addr: 334 eth_hw_addr_set(dev, addr->sa_data); 335 336 return 0; 337 338 del_unicast: 339 if (dsa_switch_supports_uc_filtering(ds)) 340 dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0); 341 342 return err; 343 } 344 345 struct dsa_slave_dump_ctx { 346 struct net_device *dev; 347 struct sk_buff *skb; 348 struct netlink_callback *cb; 349 int idx; 350 }; 351 352 static int 353 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 354 bool is_static, void *data) 355 { 356 struct dsa_slave_dump_ctx *dump = data; 357 u32 portid = NETLINK_CB(dump->cb->skb).portid; 358 u32 seq = dump->cb->nlh->nlmsg_seq; 359 struct nlmsghdr *nlh; 360 struct ndmsg *ndm; 361 362 if (dump->idx < dump->cb->args[2]) 363 goto skip; 364 365 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 366 sizeof(*ndm), NLM_F_MULTI); 367 if (!nlh) 368 return -EMSGSIZE; 369 370 ndm = nlmsg_data(nlh); 371 ndm->ndm_family = AF_BRIDGE; 372 ndm->ndm_pad1 = 0; 373 ndm->ndm_pad2 = 0; 374 ndm->ndm_flags = NTF_SELF; 375 ndm->ndm_type = 0; 376 ndm->ndm_ifindex = dump->dev->ifindex; 377 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 378 379 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 380 goto nla_put_failure; 381 382 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 383 goto nla_put_failure; 384 385 nlmsg_end(dump->skb, nlh); 386 387 skip: 388 dump->idx++; 389 return 0; 390 391 nla_put_failure: 392 nlmsg_cancel(dump->skb, nlh); 393 return -EMSGSIZE; 394 } 395 396 static int 397 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 398 struct net_device *dev, struct net_device *filter_dev, 399 int *idx) 400 { 401 struct dsa_port *dp = dsa_slave_to_port(dev); 402 struct dsa_slave_dump_ctx dump = { 403 .dev = dev, 404 .skb = skb, 405 .cb = cb, 406 .idx = *idx, 407 }; 408 int err; 409 410 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 411 *idx = dump.idx; 412 413 return err; 414 } 415 416 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 417 { 418 struct dsa_slave_priv *p = netdev_priv(dev); 419 struct dsa_switch *ds = p->dp->ds; 420 int port = p->dp->index; 421 422 /* Pass through to switch driver if it supports timestamping */ 423 switch (cmd) { 424 case SIOCGHWTSTAMP: 425 if (ds->ops->port_hwtstamp_get) 426 return ds->ops->port_hwtstamp_get(ds, port, ifr); 427 break; 428 case SIOCSHWTSTAMP: 429 if (ds->ops->port_hwtstamp_set) 430 return ds->ops->port_hwtstamp_set(ds, port, ifr); 431 break; 432 } 433 434 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 435 } 436 437 static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx, 438 const struct switchdev_attr *attr, 439 struct netlink_ext_ack *extack) 440 { 441 struct dsa_port *dp = dsa_slave_to_port(dev); 442 int ret; 443 444 if (ctx && ctx != dp) 445 return 0; 446 447 switch (attr->id) { 448 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 449 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 450 return -EOPNOTSUPP; 451 452 ret = dsa_port_set_state(dp, attr->u.stp_state, true); 453 break; 454 case SWITCHDEV_ATTR_ID_PORT_MST_STATE: 455 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 456 return -EOPNOTSUPP; 457 458 ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack); 459 break; 460 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 461 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 462 return -EOPNOTSUPP; 463 464 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 465 extack); 466 break; 467 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 468 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 469 return -EOPNOTSUPP; 470 471 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 472 break; 473 case SWITCHDEV_ATTR_ID_BRIDGE_MST: 474 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 475 return -EOPNOTSUPP; 476 477 ret = dsa_port_mst_enable(dp, attr->u.mst, extack); 478 break; 479 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 480 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 481 return -EOPNOTSUPP; 482 483 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 484 extack); 485 break; 486 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 487 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 488 return -EOPNOTSUPP; 489 490 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 491 break; 492 case SWITCHDEV_ATTR_ID_VLAN_MSTI: 493 if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev)) 494 return -EOPNOTSUPP; 495 496 ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti); 497 break; 498 default: 499 ret = -EOPNOTSUPP; 500 break; 501 } 502 503 return ret; 504 } 505 506 /* Must be called under rcu_read_lock() */ 507 static int 508 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave, 509 const struct switchdev_obj_port_vlan *vlan) 510 { 511 struct net_device *upper_dev; 512 struct list_head *iter; 513 514 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 515 u16 vid; 516 517 if (!is_vlan_dev(upper_dev)) 518 continue; 519 520 vid = vlan_dev_vlan_id(upper_dev); 521 if (vid == vlan->vid) 522 return -EBUSY; 523 } 524 525 return 0; 526 } 527 528 static int dsa_slave_vlan_add(struct net_device *dev, 529 const struct switchdev_obj *obj, 530 struct netlink_ext_ack *extack) 531 { 532 struct dsa_port *dp = dsa_slave_to_port(dev); 533 struct switchdev_obj_port_vlan *vlan; 534 int err; 535 536 if (dsa_port_skip_vlan_configuration(dp)) { 537 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 538 return 0; 539 } 540 541 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 542 543 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 544 * the same VID. 545 */ 546 if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { 547 rcu_read_lock(); 548 err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan); 549 rcu_read_unlock(); 550 if (err) { 551 NL_SET_ERR_MSG_MOD(extack, 552 "Port already has a VLAN upper with this VID"); 553 return err; 554 } 555 } 556 557 return dsa_port_vlan_add(dp, vlan, extack); 558 } 559 560 /* Offload a VLAN installed on the bridge or on a foreign interface by 561 * installing it as a VLAN towards the CPU port. 562 */ 563 static int dsa_slave_host_vlan_add(struct net_device *dev, 564 const struct switchdev_obj *obj, 565 struct netlink_ext_ack *extack) 566 { 567 struct dsa_port *dp = dsa_slave_to_port(dev); 568 struct switchdev_obj_port_vlan vlan; 569 570 /* Do nothing if this is a software bridge */ 571 if (!dp->bridge) 572 return -EOPNOTSUPP; 573 574 if (dsa_port_skip_vlan_configuration(dp)) { 575 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 576 return 0; 577 } 578 579 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 580 581 /* Even though drivers often handle CPU membership in special ways, 582 * it doesn't make sense to program a PVID, so clear this flag. 583 */ 584 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 585 586 return dsa_port_host_vlan_add(dp, &vlan, extack); 587 } 588 589 static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, 590 const struct switchdev_obj *obj, 591 struct netlink_ext_ack *extack) 592 { 593 struct dsa_port *dp = dsa_slave_to_port(dev); 594 int err; 595 596 if (ctx && ctx != dp) 597 return 0; 598 599 switch (obj->id) { 600 case SWITCHDEV_OBJ_ID_PORT_MDB: 601 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 602 return -EOPNOTSUPP; 603 604 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 605 break; 606 case SWITCHDEV_OBJ_ID_HOST_MDB: 607 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 608 return -EOPNOTSUPP; 609 610 err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 611 break; 612 case SWITCHDEV_OBJ_ID_PORT_VLAN: 613 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 614 err = dsa_slave_vlan_add(dev, obj, extack); 615 else 616 err = dsa_slave_host_vlan_add(dev, obj, extack); 617 break; 618 case SWITCHDEV_OBJ_ID_MRP: 619 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 620 return -EOPNOTSUPP; 621 622 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 623 break; 624 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 625 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 626 return -EOPNOTSUPP; 627 628 err = dsa_port_mrp_add_ring_role(dp, 629 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 630 break; 631 default: 632 err = -EOPNOTSUPP; 633 break; 634 } 635 636 return err; 637 } 638 639 static int dsa_slave_vlan_del(struct net_device *dev, 640 const struct switchdev_obj *obj) 641 { 642 struct dsa_port *dp = dsa_slave_to_port(dev); 643 struct switchdev_obj_port_vlan *vlan; 644 645 if (dsa_port_skip_vlan_configuration(dp)) 646 return 0; 647 648 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 649 650 return dsa_port_vlan_del(dp, vlan); 651 } 652 653 static int dsa_slave_host_vlan_del(struct net_device *dev, 654 const struct switchdev_obj *obj) 655 { 656 struct dsa_port *dp = dsa_slave_to_port(dev); 657 struct switchdev_obj_port_vlan *vlan; 658 659 /* Do nothing if this is a software bridge */ 660 if (!dp->bridge) 661 return -EOPNOTSUPP; 662 663 if (dsa_port_skip_vlan_configuration(dp)) 664 return 0; 665 666 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 667 668 return dsa_port_host_vlan_del(dp, vlan); 669 } 670 671 static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx, 672 const struct switchdev_obj *obj) 673 { 674 struct dsa_port *dp = dsa_slave_to_port(dev); 675 int err; 676 677 if (ctx && ctx != dp) 678 return 0; 679 680 switch (obj->id) { 681 case SWITCHDEV_OBJ_ID_PORT_MDB: 682 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 683 return -EOPNOTSUPP; 684 685 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 686 break; 687 case SWITCHDEV_OBJ_ID_HOST_MDB: 688 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 689 return -EOPNOTSUPP; 690 691 err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 692 break; 693 case SWITCHDEV_OBJ_ID_PORT_VLAN: 694 if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 695 err = dsa_slave_vlan_del(dev, obj); 696 else 697 err = dsa_slave_host_vlan_del(dev, obj); 698 break; 699 case SWITCHDEV_OBJ_ID_MRP: 700 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 701 return -EOPNOTSUPP; 702 703 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 704 break; 705 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 706 if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) 707 return -EOPNOTSUPP; 708 709 err = dsa_port_mrp_del_ring_role(dp, 710 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 711 break; 712 default: 713 err = -EOPNOTSUPP; 714 break; 715 } 716 717 return err; 718 } 719 720 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 721 struct sk_buff *skb) 722 { 723 #ifdef CONFIG_NET_POLL_CONTROLLER 724 struct dsa_slave_priv *p = netdev_priv(dev); 725 726 return netpoll_send_skb(p->netpoll, skb); 727 #else 728 BUG(); 729 return NETDEV_TX_OK; 730 #endif 731 } 732 733 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 734 struct sk_buff *skb) 735 { 736 struct dsa_switch *ds = p->dp->ds; 737 738 if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) 739 return; 740 741 if (!ds->ops->port_txtstamp) 742 return; 743 744 ds->ops->port_txtstamp(ds, p->dp->index, skb); 745 } 746 747 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 748 { 749 /* SKB for netpoll still need to be mangled with the protocol-specific 750 * tag to be successfully transmitted 751 */ 752 if (unlikely(netpoll_tx_running(dev))) 753 return dsa_slave_netpoll_send_skb(dev, skb); 754 755 /* Queue the SKB for transmission on the parent interface, but 756 * do not modify its EtherType 757 */ 758 skb->dev = dsa_slave_to_master(dev); 759 dev_queue_xmit(skb); 760 761 return NETDEV_TX_OK; 762 } 763 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 764 765 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) 766 { 767 int needed_headroom = dev->needed_headroom; 768 int needed_tailroom = dev->needed_tailroom; 769 770 /* For tail taggers, we need to pad short frames ourselves, to ensure 771 * that the tail tag does not fail at its role of being at the end of 772 * the packet, once the master interface pads the frame. Account for 773 * that pad length here, and pad later. 774 */ 775 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) 776 needed_tailroom += ETH_ZLEN - skb->len; 777 /* skb_headroom() returns unsigned int... */ 778 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); 779 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); 780 781 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) 782 /* No reallocation needed, yay! */ 783 return 0; 784 785 return pskb_expand_head(skb, needed_headroom, needed_tailroom, 786 GFP_ATOMIC); 787 } 788 789 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 790 { 791 struct dsa_slave_priv *p = netdev_priv(dev); 792 struct sk_buff *nskb; 793 794 dev_sw_netstats_tx_add(dev, 1, skb->len); 795 796 memset(skb->cb, 0, sizeof(skb->cb)); 797 798 /* Handle tx timestamp if any */ 799 dsa_skb_tx_timestamp(p, skb); 800 801 if (dsa_realloc_skb(skb, dev)) { 802 dev_kfree_skb_any(skb); 803 return NETDEV_TX_OK; 804 } 805 806 /* needed_tailroom should still be 'warm' in the cache line from 807 * dsa_realloc_skb(), which has also ensured that padding is safe. 808 */ 809 if (dev->needed_tailroom) 810 eth_skb_pad(skb); 811 812 /* Transmit function may have to reallocate the original SKB, 813 * in which case it must have freed it. Only free it here on error. 814 */ 815 nskb = p->xmit(skb, dev); 816 if (!nskb) { 817 kfree_skb(skb); 818 return NETDEV_TX_OK; 819 } 820 821 return dsa_enqueue_skb(nskb, dev); 822 } 823 824 /* ethtool operations *******************************************************/ 825 826 static void dsa_slave_get_drvinfo(struct net_device *dev, 827 struct ethtool_drvinfo *drvinfo) 828 { 829 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 830 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 831 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 832 } 833 834 static int dsa_slave_get_regs_len(struct net_device *dev) 835 { 836 struct dsa_port *dp = dsa_slave_to_port(dev); 837 struct dsa_switch *ds = dp->ds; 838 839 if (ds->ops->get_regs_len) 840 return ds->ops->get_regs_len(ds, dp->index); 841 842 return -EOPNOTSUPP; 843 } 844 845 static void 846 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 847 { 848 struct dsa_port *dp = dsa_slave_to_port(dev); 849 struct dsa_switch *ds = dp->ds; 850 851 if (ds->ops->get_regs) 852 ds->ops->get_regs(ds, dp->index, regs, _p); 853 } 854 855 static int dsa_slave_nway_reset(struct net_device *dev) 856 { 857 struct dsa_port *dp = dsa_slave_to_port(dev); 858 859 return phylink_ethtool_nway_reset(dp->pl); 860 } 861 862 static int dsa_slave_get_eeprom_len(struct net_device *dev) 863 { 864 struct dsa_port *dp = dsa_slave_to_port(dev); 865 struct dsa_switch *ds = dp->ds; 866 867 if (ds->cd && ds->cd->eeprom_len) 868 return ds->cd->eeprom_len; 869 870 if (ds->ops->get_eeprom_len) 871 return ds->ops->get_eeprom_len(ds); 872 873 return 0; 874 } 875 876 static int dsa_slave_get_eeprom(struct net_device *dev, 877 struct ethtool_eeprom *eeprom, u8 *data) 878 { 879 struct dsa_port *dp = dsa_slave_to_port(dev); 880 struct dsa_switch *ds = dp->ds; 881 882 if (ds->ops->get_eeprom) 883 return ds->ops->get_eeprom(ds, eeprom, data); 884 885 return -EOPNOTSUPP; 886 } 887 888 static int dsa_slave_set_eeprom(struct net_device *dev, 889 struct ethtool_eeprom *eeprom, u8 *data) 890 { 891 struct dsa_port *dp = dsa_slave_to_port(dev); 892 struct dsa_switch *ds = dp->ds; 893 894 if (ds->ops->set_eeprom) 895 return ds->ops->set_eeprom(ds, eeprom, data); 896 897 return -EOPNOTSUPP; 898 } 899 900 static void dsa_slave_get_strings(struct net_device *dev, 901 uint32_t stringset, uint8_t *data) 902 { 903 struct dsa_port *dp = dsa_slave_to_port(dev); 904 struct dsa_switch *ds = dp->ds; 905 906 if (stringset == ETH_SS_STATS) { 907 int len = ETH_GSTRING_LEN; 908 909 strncpy(data, "tx_packets", len); 910 strncpy(data + len, "tx_bytes", len); 911 strncpy(data + 2 * len, "rx_packets", len); 912 strncpy(data + 3 * len, "rx_bytes", len); 913 if (ds->ops->get_strings) 914 ds->ops->get_strings(ds, dp->index, stringset, 915 data + 4 * len); 916 } else if (stringset == ETH_SS_TEST) { 917 net_selftest_get_strings(data); 918 } 919 920 } 921 922 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 923 struct ethtool_stats *stats, 924 uint64_t *data) 925 { 926 struct dsa_port *dp = dsa_slave_to_port(dev); 927 struct dsa_switch *ds = dp->ds; 928 struct pcpu_sw_netstats *s; 929 unsigned int start; 930 int i; 931 932 for_each_possible_cpu(i) { 933 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 934 935 s = per_cpu_ptr(dev->tstats, i); 936 do { 937 start = u64_stats_fetch_begin_irq(&s->syncp); 938 tx_packets = u64_stats_read(&s->tx_packets); 939 tx_bytes = u64_stats_read(&s->tx_bytes); 940 rx_packets = u64_stats_read(&s->rx_packets); 941 rx_bytes = u64_stats_read(&s->rx_bytes); 942 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 943 data[0] += tx_packets; 944 data[1] += tx_bytes; 945 data[2] += rx_packets; 946 data[3] += rx_bytes; 947 } 948 if (ds->ops->get_ethtool_stats) 949 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 950 } 951 952 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 953 { 954 struct dsa_port *dp = dsa_slave_to_port(dev); 955 struct dsa_switch *ds = dp->ds; 956 957 if (sset == ETH_SS_STATS) { 958 int count = 0; 959 960 if (ds->ops->get_sset_count) { 961 count = ds->ops->get_sset_count(ds, dp->index, sset); 962 if (count < 0) 963 return count; 964 } 965 966 return count + 4; 967 } else if (sset == ETH_SS_TEST) { 968 return net_selftest_get_count(); 969 } 970 971 return -EOPNOTSUPP; 972 } 973 974 static void dsa_slave_get_eth_phy_stats(struct net_device *dev, 975 struct ethtool_eth_phy_stats *phy_stats) 976 { 977 struct dsa_port *dp = dsa_slave_to_port(dev); 978 struct dsa_switch *ds = dp->ds; 979 980 if (ds->ops->get_eth_phy_stats) 981 ds->ops->get_eth_phy_stats(ds, dp->index, phy_stats); 982 } 983 984 static void dsa_slave_get_eth_mac_stats(struct net_device *dev, 985 struct ethtool_eth_mac_stats *mac_stats) 986 { 987 struct dsa_port *dp = dsa_slave_to_port(dev); 988 struct dsa_switch *ds = dp->ds; 989 990 if (ds->ops->get_eth_mac_stats) 991 ds->ops->get_eth_mac_stats(ds, dp->index, mac_stats); 992 } 993 994 static void 995 dsa_slave_get_eth_ctrl_stats(struct net_device *dev, 996 struct ethtool_eth_ctrl_stats *ctrl_stats) 997 { 998 struct dsa_port *dp = dsa_slave_to_port(dev); 999 struct dsa_switch *ds = dp->ds; 1000 1001 if (ds->ops->get_eth_ctrl_stats) 1002 ds->ops->get_eth_ctrl_stats(ds, dp->index, ctrl_stats); 1003 } 1004 1005 static void 1006 dsa_slave_get_rmon_stats(struct net_device *dev, 1007 struct ethtool_rmon_stats *rmon_stats, 1008 const struct ethtool_rmon_hist_range **ranges) 1009 { 1010 struct dsa_port *dp = dsa_slave_to_port(dev); 1011 struct dsa_switch *ds = dp->ds; 1012 1013 if (ds->ops->get_rmon_stats) 1014 ds->ops->get_rmon_stats(ds, dp->index, rmon_stats, ranges); 1015 } 1016 1017 static void dsa_slave_net_selftest(struct net_device *ndev, 1018 struct ethtool_test *etest, u64 *buf) 1019 { 1020 struct dsa_port *dp = dsa_slave_to_port(ndev); 1021 struct dsa_switch *ds = dp->ds; 1022 1023 if (ds->ops->self_test) { 1024 ds->ops->self_test(ds, dp->index, etest, buf); 1025 return; 1026 } 1027 1028 net_selftest(ndev, etest, buf); 1029 } 1030 1031 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1032 { 1033 struct dsa_port *dp = dsa_slave_to_port(dev); 1034 struct dsa_switch *ds = dp->ds; 1035 1036 phylink_ethtool_get_wol(dp->pl, w); 1037 1038 if (ds->ops->get_wol) 1039 ds->ops->get_wol(ds, dp->index, w); 1040 } 1041 1042 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 1043 { 1044 struct dsa_port *dp = dsa_slave_to_port(dev); 1045 struct dsa_switch *ds = dp->ds; 1046 int ret = -EOPNOTSUPP; 1047 1048 phylink_ethtool_set_wol(dp->pl, w); 1049 1050 if (ds->ops->set_wol) 1051 ret = ds->ops->set_wol(ds, dp->index, w); 1052 1053 return ret; 1054 } 1055 1056 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 1057 { 1058 struct dsa_port *dp = dsa_slave_to_port(dev); 1059 struct dsa_switch *ds = dp->ds; 1060 int ret; 1061 1062 /* Port's PHY and MAC both need to be EEE capable */ 1063 if (!dev->phydev || !dp->pl) 1064 return -ENODEV; 1065 1066 if (!ds->ops->set_mac_eee) 1067 return -EOPNOTSUPP; 1068 1069 ret = ds->ops->set_mac_eee(ds, dp->index, e); 1070 if (ret) 1071 return ret; 1072 1073 return phylink_ethtool_set_eee(dp->pl, e); 1074 } 1075 1076 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 1077 { 1078 struct dsa_port *dp = dsa_slave_to_port(dev); 1079 struct dsa_switch *ds = dp->ds; 1080 int ret; 1081 1082 /* Port's PHY and MAC both need to be EEE capable */ 1083 if (!dev->phydev || !dp->pl) 1084 return -ENODEV; 1085 1086 if (!ds->ops->get_mac_eee) 1087 return -EOPNOTSUPP; 1088 1089 ret = ds->ops->get_mac_eee(ds, dp->index, e); 1090 if (ret) 1091 return ret; 1092 1093 return phylink_ethtool_get_eee(dp->pl, e); 1094 } 1095 1096 static int dsa_slave_get_link_ksettings(struct net_device *dev, 1097 struct ethtool_link_ksettings *cmd) 1098 { 1099 struct dsa_port *dp = dsa_slave_to_port(dev); 1100 1101 return phylink_ethtool_ksettings_get(dp->pl, cmd); 1102 } 1103 1104 static int dsa_slave_set_link_ksettings(struct net_device *dev, 1105 const struct ethtool_link_ksettings *cmd) 1106 { 1107 struct dsa_port *dp = dsa_slave_to_port(dev); 1108 1109 return phylink_ethtool_ksettings_set(dp->pl, cmd); 1110 } 1111 1112 static void dsa_slave_get_pause_stats(struct net_device *dev, 1113 struct ethtool_pause_stats *pause_stats) 1114 { 1115 struct dsa_port *dp = dsa_slave_to_port(dev); 1116 struct dsa_switch *ds = dp->ds; 1117 1118 if (ds->ops->get_pause_stats) 1119 ds->ops->get_pause_stats(ds, dp->index, pause_stats); 1120 } 1121 1122 static void dsa_slave_get_pauseparam(struct net_device *dev, 1123 struct ethtool_pauseparam *pause) 1124 { 1125 struct dsa_port *dp = dsa_slave_to_port(dev); 1126 1127 phylink_ethtool_get_pauseparam(dp->pl, pause); 1128 } 1129 1130 static int dsa_slave_set_pauseparam(struct net_device *dev, 1131 struct ethtool_pauseparam *pause) 1132 { 1133 struct dsa_port *dp = dsa_slave_to_port(dev); 1134 1135 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1136 } 1137 1138 #ifdef CONFIG_NET_POLL_CONTROLLER 1139 static int dsa_slave_netpoll_setup(struct net_device *dev, 1140 struct netpoll_info *ni) 1141 { 1142 struct net_device *master = dsa_slave_to_master(dev); 1143 struct dsa_slave_priv *p = netdev_priv(dev); 1144 struct netpoll *netpoll; 1145 int err = 0; 1146 1147 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1148 if (!netpoll) 1149 return -ENOMEM; 1150 1151 err = __netpoll_setup(netpoll, master); 1152 if (err) { 1153 kfree(netpoll); 1154 goto out; 1155 } 1156 1157 p->netpoll = netpoll; 1158 out: 1159 return err; 1160 } 1161 1162 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 1163 { 1164 struct dsa_slave_priv *p = netdev_priv(dev); 1165 struct netpoll *netpoll = p->netpoll; 1166 1167 if (!netpoll) 1168 return; 1169 1170 p->netpoll = NULL; 1171 1172 __netpoll_free(netpoll); 1173 } 1174 1175 static void dsa_slave_poll_controller(struct net_device *dev) 1176 { 1177 } 1178 #endif 1179 1180 static struct dsa_mall_tc_entry * 1181 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1182 { 1183 struct dsa_slave_priv *p = netdev_priv(dev); 1184 struct dsa_mall_tc_entry *mall_tc_entry; 1185 1186 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1187 if (mall_tc_entry->cookie == cookie) 1188 return mall_tc_entry; 1189 1190 return NULL; 1191 } 1192 1193 static int 1194 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 1195 struct tc_cls_matchall_offload *cls, 1196 bool ingress) 1197 { 1198 struct netlink_ext_ack *extack = cls->common.extack; 1199 struct dsa_port *dp = dsa_slave_to_port(dev); 1200 struct dsa_slave_priv *p = netdev_priv(dev); 1201 struct dsa_mall_mirror_tc_entry *mirror; 1202 struct dsa_mall_tc_entry *mall_tc_entry; 1203 struct dsa_switch *ds = dp->ds; 1204 struct flow_action_entry *act; 1205 struct dsa_port *to_dp; 1206 int err; 1207 1208 if (!ds->ops->port_mirror_add) 1209 return -EOPNOTSUPP; 1210 1211 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1212 cls->common.extack)) 1213 return -EOPNOTSUPP; 1214 1215 act = &cls->rule->action.entries[0]; 1216 1217 if (!act->dev) 1218 return -EINVAL; 1219 1220 if (!dsa_slave_dev_check(act->dev)) 1221 return -EOPNOTSUPP; 1222 1223 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1224 if (!mall_tc_entry) 1225 return -ENOMEM; 1226 1227 mall_tc_entry->cookie = cls->cookie; 1228 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1229 mirror = &mall_tc_entry->mirror; 1230 1231 to_dp = dsa_slave_to_port(act->dev); 1232 1233 mirror->to_local_port = to_dp->index; 1234 mirror->ingress = ingress; 1235 1236 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1237 if (err) { 1238 kfree(mall_tc_entry); 1239 return err; 1240 } 1241 1242 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1243 1244 return err; 1245 } 1246 1247 static int 1248 dsa_slave_add_cls_matchall_police(struct net_device *dev, 1249 struct tc_cls_matchall_offload *cls, 1250 bool ingress) 1251 { 1252 struct netlink_ext_ack *extack = cls->common.extack; 1253 struct dsa_port *dp = dsa_slave_to_port(dev); 1254 struct dsa_slave_priv *p = netdev_priv(dev); 1255 struct dsa_mall_policer_tc_entry *policer; 1256 struct dsa_mall_tc_entry *mall_tc_entry; 1257 struct dsa_switch *ds = dp->ds; 1258 struct flow_action_entry *act; 1259 int err; 1260 1261 if (!ds->ops->port_policer_add) { 1262 NL_SET_ERR_MSG_MOD(extack, 1263 "Policing offload not implemented"); 1264 return -EOPNOTSUPP; 1265 } 1266 1267 if (!ingress) { 1268 NL_SET_ERR_MSG_MOD(extack, 1269 "Only supported on ingress qdisc"); 1270 return -EOPNOTSUPP; 1271 } 1272 1273 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1274 cls->common.extack)) 1275 return -EOPNOTSUPP; 1276 1277 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1278 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1279 NL_SET_ERR_MSG_MOD(extack, 1280 "Only one port policer allowed"); 1281 return -EEXIST; 1282 } 1283 } 1284 1285 act = &cls->rule->action.entries[0]; 1286 1287 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1288 if (!mall_tc_entry) 1289 return -ENOMEM; 1290 1291 mall_tc_entry->cookie = cls->cookie; 1292 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1293 policer = &mall_tc_entry->policer; 1294 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1295 policer->burst = act->police.burst; 1296 1297 err = ds->ops->port_policer_add(ds, dp->index, policer); 1298 if (err) { 1299 kfree(mall_tc_entry); 1300 return err; 1301 } 1302 1303 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1304 1305 return err; 1306 } 1307 1308 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1309 struct tc_cls_matchall_offload *cls, 1310 bool ingress) 1311 { 1312 int err = -EOPNOTSUPP; 1313 1314 if (cls->common.protocol == htons(ETH_P_ALL) && 1315 flow_offload_has_one_action(&cls->rule->action) && 1316 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1317 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1318 else if (flow_offload_has_one_action(&cls->rule->action) && 1319 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1320 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1321 1322 return err; 1323 } 1324 1325 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1326 struct tc_cls_matchall_offload *cls) 1327 { 1328 struct dsa_port *dp = dsa_slave_to_port(dev); 1329 struct dsa_mall_tc_entry *mall_tc_entry; 1330 struct dsa_switch *ds = dp->ds; 1331 1332 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1333 if (!mall_tc_entry) 1334 return; 1335 1336 list_del(&mall_tc_entry->list); 1337 1338 switch (mall_tc_entry->type) { 1339 case DSA_PORT_MALL_MIRROR: 1340 if (ds->ops->port_mirror_del) 1341 ds->ops->port_mirror_del(ds, dp->index, 1342 &mall_tc_entry->mirror); 1343 break; 1344 case DSA_PORT_MALL_POLICER: 1345 if (ds->ops->port_policer_del) 1346 ds->ops->port_policer_del(ds, dp->index); 1347 break; 1348 default: 1349 WARN_ON(1); 1350 } 1351 1352 kfree(mall_tc_entry); 1353 } 1354 1355 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1356 struct tc_cls_matchall_offload *cls, 1357 bool ingress) 1358 { 1359 if (cls->common.chain_index) 1360 return -EOPNOTSUPP; 1361 1362 switch (cls->command) { 1363 case TC_CLSMATCHALL_REPLACE: 1364 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1365 case TC_CLSMATCHALL_DESTROY: 1366 dsa_slave_del_cls_matchall(dev, cls); 1367 return 0; 1368 default: 1369 return -EOPNOTSUPP; 1370 } 1371 } 1372 1373 static int dsa_slave_add_cls_flower(struct net_device *dev, 1374 struct flow_cls_offload *cls, 1375 bool ingress) 1376 { 1377 struct dsa_port *dp = dsa_slave_to_port(dev); 1378 struct dsa_switch *ds = dp->ds; 1379 int port = dp->index; 1380 1381 if (!ds->ops->cls_flower_add) 1382 return -EOPNOTSUPP; 1383 1384 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1385 } 1386 1387 static int dsa_slave_del_cls_flower(struct net_device *dev, 1388 struct flow_cls_offload *cls, 1389 bool ingress) 1390 { 1391 struct dsa_port *dp = dsa_slave_to_port(dev); 1392 struct dsa_switch *ds = dp->ds; 1393 int port = dp->index; 1394 1395 if (!ds->ops->cls_flower_del) 1396 return -EOPNOTSUPP; 1397 1398 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1399 } 1400 1401 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1402 struct flow_cls_offload *cls, 1403 bool ingress) 1404 { 1405 struct dsa_port *dp = dsa_slave_to_port(dev); 1406 struct dsa_switch *ds = dp->ds; 1407 int port = dp->index; 1408 1409 if (!ds->ops->cls_flower_stats) 1410 return -EOPNOTSUPP; 1411 1412 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1413 } 1414 1415 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1416 struct flow_cls_offload *cls, 1417 bool ingress) 1418 { 1419 switch (cls->command) { 1420 case FLOW_CLS_REPLACE: 1421 return dsa_slave_add_cls_flower(dev, cls, ingress); 1422 case FLOW_CLS_DESTROY: 1423 return dsa_slave_del_cls_flower(dev, cls, ingress); 1424 case FLOW_CLS_STATS: 1425 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1426 default: 1427 return -EOPNOTSUPP; 1428 } 1429 } 1430 1431 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1432 void *cb_priv, bool ingress) 1433 { 1434 struct net_device *dev = cb_priv; 1435 1436 if (!tc_can_offload(dev)) 1437 return -EOPNOTSUPP; 1438 1439 switch (type) { 1440 case TC_SETUP_CLSMATCHALL: 1441 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1442 case TC_SETUP_CLSFLOWER: 1443 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1444 default: 1445 return -EOPNOTSUPP; 1446 } 1447 } 1448 1449 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1450 void *type_data, void *cb_priv) 1451 { 1452 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1453 } 1454 1455 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1456 void *type_data, void *cb_priv) 1457 { 1458 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1459 } 1460 1461 static LIST_HEAD(dsa_slave_block_cb_list); 1462 1463 static int dsa_slave_setup_tc_block(struct net_device *dev, 1464 struct flow_block_offload *f) 1465 { 1466 struct flow_block_cb *block_cb; 1467 flow_setup_cb_t *cb; 1468 1469 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1470 cb = dsa_slave_setup_tc_block_cb_ig; 1471 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1472 cb = dsa_slave_setup_tc_block_cb_eg; 1473 else 1474 return -EOPNOTSUPP; 1475 1476 f->driver_block_list = &dsa_slave_block_cb_list; 1477 1478 switch (f->command) { 1479 case FLOW_BLOCK_BIND: 1480 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1481 return -EBUSY; 1482 1483 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1484 if (IS_ERR(block_cb)) 1485 return PTR_ERR(block_cb); 1486 1487 flow_block_cb_add(block_cb, f); 1488 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1489 return 0; 1490 case FLOW_BLOCK_UNBIND: 1491 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1492 if (!block_cb) 1493 return -ENOENT; 1494 1495 flow_block_cb_remove(block_cb, f); 1496 list_del(&block_cb->driver_list); 1497 return 0; 1498 default: 1499 return -EOPNOTSUPP; 1500 } 1501 } 1502 1503 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port, 1504 void *type_data) 1505 { 1506 struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp; 1507 struct net_device *master = cpu_dp->master; 1508 1509 if (!master->netdev_ops->ndo_setup_tc) 1510 return -EOPNOTSUPP; 1511 1512 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data); 1513 } 1514 1515 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1516 void *type_data) 1517 { 1518 struct dsa_port *dp = dsa_slave_to_port(dev); 1519 struct dsa_switch *ds = dp->ds; 1520 1521 switch (type) { 1522 case TC_SETUP_BLOCK: 1523 return dsa_slave_setup_tc_block(dev, type_data); 1524 case TC_SETUP_FT: 1525 return dsa_slave_setup_ft_block(ds, dp->index, type_data); 1526 default: 1527 break; 1528 } 1529 1530 if (!ds->ops->port_setup_tc) 1531 return -EOPNOTSUPP; 1532 1533 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1534 } 1535 1536 static int dsa_slave_get_rxnfc(struct net_device *dev, 1537 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1538 { 1539 struct dsa_port *dp = dsa_slave_to_port(dev); 1540 struct dsa_switch *ds = dp->ds; 1541 1542 if (!ds->ops->get_rxnfc) 1543 return -EOPNOTSUPP; 1544 1545 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1546 } 1547 1548 static int dsa_slave_set_rxnfc(struct net_device *dev, 1549 struct ethtool_rxnfc *nfc) 1550 { 1551 struct dsa_port *dp = dsa_slave_to_port(dev); 1552 struct dsa_switch *ds = dp->ds; 1553 1554 if (!ds->ops->set_rxnfc) 1555 return -EOPNOTSUPP; 1556 1557 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1558 } 1559 1560 static int dsa_slave_get_ts_info(struct net_device *dev, 1561 struct ethtool_ts_info *ts) 1562 { 1563 struct dsa_slave_priv *p = netdev_priv(dev); 1564 struct dsa_switch *ds = p->dp->ds; 1565 1566 if (!ds->ops->get_ts_info) 1567 return -EOPNOTSUPP; 1568 1569 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1570 } 1571 1572 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1573 u16 vid) 1574 { 1575 struct dsa_port *dp = dsa_slave_to_port(dev); 1576 struct switchdev_obj_port_vlan vlan = { 1577 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1578 .vid = vid, 1579 /* This API only allows programming tagged, non-PVID VIDs */ 1580 .flags = 0, 1581 }; 1582 struct netlink_ext_ack extack = {0}; 1583 int ret; 1584 1585 /* User port... */ 1586 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1587 if (ret) { 1588 if (extack._msg) 1589 netdev_err(dev, "%s\n", extack._msg); 1590 return ret; 1591 } 1592 1593 /* And CPU port... */ 1594 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1595 if (ret) { 1596 if (extack._msg) 1597 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1598 extack._msg); 1599 return ret; 1600 } 1601 1602 return 0; 1603 } 1604 1605 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1606 u16 vid) 1607 { 1608 struct dsa_port *dp = dsa_slave_to_port(dev); 1609 struct switchdev_obj_port_vlan vlan = { 1610 .vid = vid, 1611 /* This API only allows programming tagged, non-PVID VIDs */ 1612 .flags = 0, 1613 }; 1614 int err; 1615 1616 err = dsa_port_vlan_del(dp, &vlan); 1617 if (err) 1618 return err; 1619 1620 return dsa_port_host_vlan_del(dp, &vlan); 1621 } 1622 1623 static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg) 1624 { 1625 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1626 1627 return dsa_slave_vlan_rx_add_vid(arg, proto, vid); 1628 } 1629 1630 static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg) 1631 { 1632 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1633 1634 return dsa_slave_vlan_rx_kill_vid(arg, proto, vid); 1635 } 1636 1637 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1638 * filtering is enabled. The baseline is that only ports that offload a 1639 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1640 * but there are exceptions for quirky hardware. 1641 * 1642 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1643 * the same switch with other ports that offload a VLAN-aware bridge are also 1644 * inevitably VLAN-aware. 1645 * 1646 * To summarize, a DSA switch port offloads: 1647 * 1648 * - If standalone (this includes software bridge, software LAG): 1649 * - if ds->needs_standalone_vlan_filtering = true, OR if 1650 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1651 * this switch chip which have vlan_filtering=1) 1652 * - the 8021q upper VLANs 1653 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1654 * global, or it is, but no port is under a VLAN-aware bridge): 1655 * - no VLAN (any 8021q upper is a software VLAN) 1656 * 1657 * - If under a vlan_filtering=0 bridge which it offload: 1658 * - if ds->configure_vlan_while_not_filtering = true (default): 1659 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1660 * - else (deprecated): 1661 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1662 * enabled, so this behavior is broken and discouraged. 1663 * 1664 * - If under a vlan_filtering=1 bridge which it offload: 1665 * - the bridge VLANs 1666 * - the 8021q upper VLANs 1667 */ 1668 int dsa_slave_manage_vlan_filtering(struct net_device *slave, 1669 bool vlan_filtering) 1670 { 1671 int err; 1672 1673 if (vlan_filtering) { 1674 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1675 1676 err = vlan_for_each(slave, dsa_slave_restore_vlan, slave); 1677 if (err) { 1678 vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1679 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1680 return err; 1681 } 1682 } else { 1683 err = vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1684 if (err) 1685 return err; 1686 1687 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1688 } 1689 1690 return 0; 1691 } 1692 1693 struct dsa_hw_port { 1694 struct list_head list; 1695 struct net_device *dev; 1696 int old_mtu; 1697 }; 1698 1699 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1700 { 1701 const struct dsa_hw_port *p; 1702 int err; 1703 1704 list_for_each_entry(p, hw_port_list, list) { 1705 if (p->dev->mtu == mtu) 1706 continue; 1707 1708 err = dev_set_mtu(p->dev, mtu); 1709 if (err) 1710 goto rollback; 1711 } 1712 1713 return 0; 1714 1715 rollback: 1716 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1717 if (p->dev->mtu == p->old_mtu) 1718 continue; 1719 1720 if (dev_set_mtu(p->dev, p->old_mtu)) 1721 netdev_err(p->dev, "Failed to restore MTU\n"); 1722 } 1723 1724 return err; 1725 } 1726 1727 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1728 { 1729 struct dsa_hw_port *p, *n; 1730 1731 list_for_each_entry_safe(p, n, hw_port_list, list) 1732 kfree(p); 1733 } 1734 1735 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1736 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1737 { 1738 struct list_head hw_port_list; 1739 struct dsa_switch_tree *dst; 1740 int min_mtu = ETH_MAX_MTU; 1741 struct dsa_port *other_dp; 1742 int err; 1743 1744 if (!dp->ds->mtu_enforcement_ingress) 1745 return; 1746 1747 if (!dp->bridge) 1748 return; 1749 1750 INIT_LIST_HEAD(&hw_port_list); 1751 1752 /* Populate the list of ports that are part of the same bridge 1753 * as the newly added/modified port 1754 */ 1755 list_for_each_entry(dst, &dsa_tree_list, list) { 1756 list_for_each_entry(other_dp, &dst->ports, list) { 1757 struct dsa_hw_port *hw_port; 1758 struct net_device *slave; 1759 1760 if (other_dp->type != DSA_PORT_TYPE_USER) 1761 continue; 1762 1763 if (!dsa_port_bridge_same(dp, other_dp)) 1764 continue; 1765 1766 if (!other_dp->ds->mtu_enforcement_ingress) 1767 continue; 1768 1769 slave = other_dp->slave; 1770 1771 if (min_mtu > slave->mtu) 1772 min_mtu = slave->mtu; 1773 1774 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1775 if (!hw_port) 1776 goto out; 1777 1778 hw_port->dev = slave; 1779 hw_port->old_mtu = slave->mtu; 1780 1781 list_add(&hw_port->list, &hw_port_list); 1782 } 1783 } 1784 1785 /* Attempt to configure the entire hardware bridge to the newly added 1786 * interface's MTU first, regardless of whether the intention of the 1787 * user was to raise or lower it. 1788 */ 1789 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1790 if (!err) 1791 goto out; 1792 1793 /* Clearly that didn't work out so well, so just set the minimum MTU on 1794 * all hardware bridge ports now. If this fails too, then all ports will 1795 * still have their old MTU rolled back anyway. 1796 */ 1797 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1798 1799 out: 1800 dsa_hw_port_list_free(&hw_port_list); 1801 } 1802 1803 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1804 { 1805 struct net_device *master = dsa_slave_to_master(dev); 1806 struct dsa_port *dp = dsa_slave_to_port(dev); 1807 struct dsa_port *cpu_dp = dp->cpu_dp; 1808 struct dsa_switch *ds = dp->ds; 1809 struct dsa_port *other_dp; 1810 int largest_mtu = 0; 1811 int new_master_mtu; 1812 int old_master_mtu; 1813 int mtu_limit; 1814 int cpu_mtu; 1815 int err; 1816 1817 if (!ds->ops->port_change_mtu) 1818 return -EOPNOTSUPP; 1819 1820 dsa_tree_for_each_user_port(other_dp, ds->dst) { 1821 int slave_mtu; 1822 1823 /* During probe, this function will be called for each slave 1824 * device, while not all of them have been allocated. That's 1825 * ok, it doesn't change what the maximum is, so ignore it. 1826 */ 1827 if (!other_dp->slave) 1828 continue; 1829 1830 /* Pretend that we already applied the setting, which we 1831 * actually haven't (still haven't done all integrity checks) 1832 */ 1833 if (dp == other_dp) 1834 slave_mtu = new_mtu; 1835 else 1836 slave_mtu = other_dp->slave->mtu; 1837 1838 if (largest_mtu < slave_mtu) 1839 largest_mtu = slave_mtu; 1840 } 1841 1842 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1843 old_master_mtu = master->mtu; 1844 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops); 1845 if (new_master_mtu > mtu_limit) 1846 return -ERANGE; 1847 1848 /* If the master MTU isn't over limit, there's no need to check the CPU 1849 * MTU, since that surely isn't either. 1850 */ 1851 cpu_mtu = largest_mtu; 1852 1853 /* Start applying stuff */ 1854 if (new_master_mtu != old_master_mtu) { 1855 err = dev_set_mtu(master, new_master_mtu); 1856 if (err < 0) 1857 goto out_master_failed; 1858 1859 /* We only need to propagate the MTU of the CPU port to 1860 * upstream switches, so emit a notifier which updates them. 1861 */ 1862 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 1863 if (err) 1864 goto out_cpu_failed; 1865 } 1866 1867 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 1868 if (err) 1869 goto out_port_failed; 1870 1871 dev->mtu = new_mtu; 1872 1873 dsa_bridge_mtu_normalization(dp); 1874 1875 return 0; 1876 1877 out_port_failed: 1878 if (new_master_mtu != old_master_mtu) 1879 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1880 dsa_tag_protocol_overhead(cpu_dp->tag_ops)); 1881 out_cpu_failed: 1882 if (new_master_mtu != old_master_mtu) 1883 dev_set_mtu(master, old_master_mtu); 1884 out_master_failed: 1885 return err; 1886 } 1887 1888 static int __maybe_unused 1889 dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 1890 { 1891 struct dsa_port *dp = dsa_slave_to_port(dev); 1892 struct dsa_switch *ds = dp->ds; 1893 unsigned long mask, new_prio; 1894 int err, port = dp->index; 1895 1896 if (!ds->ops->port_set_default_prio) 1897 return -EOPNOTSUPP; 1898 1899 err = dcb_ieee_setapp(dev, app); 1900 if (err) 1901 return err; 1902 1903 mask = dcb_ieee_getapp_mask(dev, app); 1904 new_prio = __fls(mask); 1905 1906 err = ds->ops->port_set_default_prio(ds, port, new_prio); 1907 if (err) { 1908 dcb_ieee_delapp(dev, app); 1909 return err; 1910 } 1911 1912 return 0; 1913 } 1914 1915 static int __maybe_unused 1916 dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 1917 { 1918 struct dsa_port *dp = dsa_slave_to_port(dev); 1919 struct dsa_switch *ds = dp->ds; 1920 unsigned long mask, new_prio; 1921 int err, port = dp->index; 1922 u8 dscp = app->protocol; 1923 1924 if (!ds->ops->port_add_dscp_prio) 1925 return -EOPNOTSUPP; 1926 1927 if (dscp >= 64) { 1928 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 1929 dscp); 1930 return -EINVAL; 1931 } 1932 1933 err = dcb_ieee_setapp(dev, app); 1934 if (err) 1935 return err; 1936 1937 mask = dcb_ieee_getapp_mask(dev, app); 1938 new_prio = __fls(mask); 1939 1940 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 1941 if (err) { 1942 dcb_ieee_delapp(dev, app); 1943 return err; 1944 } 1945 1946 return 0; 1947 } 1948 1949 static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev, 1950 struct dcb_app *app) 1951 { 1952 switch (app->selector) { 1953 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 1954 switch (app->protocol) { 1955 case 0: 1956 return dsa_slave_dcbnl_set_default_prio(dev, app); 1957 default: 1958 return -EOPNOTSUPP; 1959 } 1960 break; 1961 case IEEE_8021QAZ_APP_SEL_DSCP: 1962 return dsa_slave_dcbnl_add_dscp_prio(dev, app); 1963 default: 1964 return -EOPNOTSUPP; 1965 } 1966 } 1967 1968 static int __maybe_unused 1969 dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 1970 { 1971 struct dsa_port *dp = dsa_slave_to_port(dev); 1972 struct dsa_switch *ds = dp->ds; 1973 unsigned long mask, new_prio; 1974 int err, port = dp->index; 1975 1976 if (!ds->ops->port_set_default_prio) 1977 return -EOPNOTSUPP; 1978 1979 err = dcb_ieee_delapp(dev, app); 1980 if (err) 1981 return err; 1982 1983 mask = dcb_ieee_getapp_mask(dev, app); 1984 new_prio = mask ? __fls(mask) : 0; 1985 1986 err = ds->ops->port_set_default_prio(ds, port, new_prio); 1987 if (err) { 1988 dcb_ieee_setapp(dev, app); 1989 return err; 1990 } 1991 1992 return 0; 1993 } 1994 1995 static int __maybe_unused 1996 dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 1997 { 1998 struct dsa_port *dp = dsa_slave_to_port(dev); 1999 struct dsa_switch *ds = dp->ds; 2000 int err, port = dp->index; 2001 u8 dscp = app->protocol; 2002 2003 if (!ds->ops->port_del_dscp_prio) 2004 return -EOPNOTSUPP; 2005 2006 err = dcb_ieee_delapp(dev, app); 2007 if (err) 2008 return err; 2009 2010 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2011 if (err) { 2012 dcb_ieee_setapp(dev, app); 2013 return err; 2014 } 2015 2016 return 0; 2017 } 2018 2019 static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev, 2020 struct dcb_app *app) 2021 { 2022 switch (app->selector) { 2023 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2024 switch (app->protocol) { 2025 case 0: 2026 return dsa_slave_dcbnl_del_default_prio(dev, app); 2027 default: 2028 return -EOPNOTSUPP; 2029 } 2030 break; 2031 case IEEE_8021QAZ_APP_SEL_DSCP: 2032 return dsa_slave_dcbnl_del_dscp_prio(dev, app); 2033 default: 2034 return -EOPNOTSUPP; 2035 } 2036 } 2037 2038 /* Pre-populate the DCB application priority table with the priorities 2039 * configured during switch setup, which we read from hardware here. 2040 */ 2041 static int dsa_slave_dcbnl_init(struct net_device *dev) 2042 { 2043 struct dsa_port *dp = dsa_slave_to_port(dev); 2044 struct dsa_switch *ds = dp->ds; 2045 int port = dp->index; 2046 int err; 2047 2048 if (ds->ops->port_get_default_prio) { 2049 int prio = ds->ops->port_get_default_prio(ds, port); 2050 struct dcb_app app = { 2051 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2052 .protocol = 0, 2053 .priority = prio, 2054 }; 2055 2056 if (prio < 0) 2057 return prio; 2058 2059 err = dcb_ieee_setapp(dev, &app); 2060 if (err) 2061 return err; 2062 } 2063 2064 if (ds->ops->port_get_dscp_prio) { 2065 int protocol; 2066 2067 for (protocol = 0; protocol < 64; protocol++) { 2068 struct dcb_app app = { 2069 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2070 .protocol = protocol, 2071 }; 2072 int prio; 2073 2074 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2075 if (prio == -EOPNOTSUPP) 2076 continue; 2077 if (prio < 0) 2078 return prio; 2079 2080 app.priority = prio; 2081 2082 err = dcb_ieee_setapp(dev, &app); 2083 if (err) 2084 return err; 2085 } 2086 } 2087 2088 return 0; 2089 } 2090 2091 static const struct ethtool_ops dsa_slave_ethtool_ops = { 2092 .get_drvinfo = dsa_slave_get_drvinfo, 2093 .get_regs_len = dsa_slave_get_regs_len, 2094 .get_regs = dsa_slave_get_regs, 2095 .nway_reset = dsa_slave_nway_reset, 2096 .get_link = ethtool_op_get_link, 2097 .get_eeprom_len = dsa_slave_get_eeprom_len, 2098 .get_eeprom = dsa_slave_get_eeprom, 2099 .set_eeprom = dsa_slave_set_eeprom, 2100 .get_strings = dsa_slave_get_strings, 2101 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 2102 .get_sset_count = dsa_slave_get_sset_count, 2103 .get_eth_phy_stats = dsa_slave_get_eth_phy_stats, 2104 .get_eth_mac_stats = dsa_slave_get_eth_mac_stats, 2105 .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats, 2106 .get_rmon_stats = dsa_slave_get_rmon_stats, 2107 .set_wol = dsa_slave_set_wol, 2108 .get_wol = dsa_slave_get_wol, 2109 .set_eee = dsa_slave_set_eee, 2110 .get_eee = dsa_slave_get_eee, 2111 .get_link_ksettings = dsa_slave_get_link_ksettings, 2112 .set_link_ksettings = dsa_slave_set_link_ksettings, 2113 .get_pause_stats = dsa_slave_get_pause_stats, 2114 .get_pauseparam = dsa_slave_get_pauseparam, 2115 .set_pauseparam = dsa_slave_set_pauseparam, 2116 .get_rxnfc = dsa_slave_get_rxnfc, 2117 .set_rxnfc = dsa_slave_set_rxnfc, 2118 .get_ts_info = dsa_slave_get_ts_info, 2119 .self_test = dsa_slave_net_selftest, 2120 }; 2121 2122 static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = { 2123 .ieee_setapp = dsa_slave_dcbnl_ieee_setapp, 2124 .ieee_delapp = dsa_slave_dcbnl_ieee_delapp, 2125 }; 2126 2127 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) 2128 { 2129 struct dsa_port *dp = dsa_slave_to_port(dev); 2130 2131 return &dp->devlink_port; 2132 } 2133 2134 static void dsa_slave_get_stats64(struct net_device *dev, 2135 struct rtnl_link_stats64 *s) 2136 { 2137 struct dsa_port *dp = dsa_slave_to_port(dev); 2138 struct dsa_switch *ds = dp->ds; 2139 2140 if (ds->ops->get_stats64) 2141 ds->ops->get_stats64(ds, dp->index, s); 2142 else 2143 dev_get_tstats64(dev, s); 2144 } 2145 2146 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, 2147 struct net_device_path *path) 2148 { 2149 struct dsa_port *dp = dsa_slave_to_port(ctx->dev); 2150 struct dsa_port *cpu_dp = dp->cpu_dp; 2151 2152 path->dev = ctx->dev; 2153 path->type = DEV_PATH_DSA; 2154 path->dsa.proto = cpu_dp->tag_ops->proto; 2155 path->dsa.port = dp->index; 2156 ctx->dev = cpu_dp->master; 2157 2158 return 0; 2159 } 2160 2161 static const struct net_device_ops dsa_slave_netdev_ops = { 2162 .ndo_open = dsa_slave_open, 2163 .ndo_stop = dsa_slave_close, 2164 .ndo_start_xmit = dsa_slave_xmit, 2165 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 2166 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 2167 .ndo_set_mac_address = dsa_slave_set_mac_address, 2168 .ndo_fdb_dump = dsa_slave_fdb_dump, 2169 .ndo_eth_ioctl = dsa_slave_ioctl, 2170 .ndo_get_iflink = dsa_slave_get_iflink, 2171 #ifdef CONFIG_NET_POLL_CONTROLLER 2172 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 2173 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 2174 .ndo_poll_controller = dsa_slave_poll_controller, 2175 #endif 2176 .ndo_setup_tc = dsa_slave_setup_tc, 2177 .ndo_get_stats64 = dsa_slave_get_stats64, 2178 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 2179 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 2180 .ndo_get_devlink_port = dsa_slave_get_devlink_port, 2181 .ndo_change_mtu = dsa_slave_change_mtu, 2182 .ndo_fill_forward_path = dsa_slave_fill_forward_path, 2183 }; 2184 2185 static struct device_type dsa_type = { 2186 .name = "dsa", 2187 }; 2188 2189 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2190 { 2191 const struct dsa_port *dp = dsa_to_port(ds, port); 2192 2193 if (dp->pl) 2194 phylink_mac_change(dp->pl, up); 2195 } 2196 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2197 2198 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 2199 struct phylink_link_state *state) 2200 { 2201 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 2202 struct dsa_switch *ds = dp->ds; 2203 2204 /* No need to check that this operation is valid, the callback would 2205 * not be called if it was not. 2206 */ 2207 ds->ops->phylink_fixed_state(ds, dp->index, state); 2208 } 2209 2210 /* slave device setup *******************************************************/ 2211 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr, 2212 u32 flags) 2213 { 2214 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2215 struct dsa_switch *ds = dp->ds; 2216 2217 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 2218 if (!slave_dev->phydev) { 2219 netdev_err(slave_dev, "no phy at %d\n", addr); 2220 return -ENODEV; 2221 } 2222 2223 slave_dev->phydev->dev_flags |= flags; 2224 2225 return phylink_connect_phy(dp->pl, slave_dev->phydev); 2226 } 2227 2228 static int dsa_slave_phy_setup(struct net_device *slave_dev) 2229 { 2230 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2231 struct device_node *port_dn = dp->dn; 2232 struct dsa_switch *ds = dp->ds; 2233 u32 phy_flags = 0; 2234 int ret; 2235 2236 dp->pl_config.dev = &slave_dev->dev; 2237 dp->pl_config.type = PHYLINK_NETDEV; 2238 2239 /* The get_fixed_state callback takes precedence over polling the 2240 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2241 * this if the switch provides such a callback. 2242 */ 2243 if (ds->ops->phylink_fixed_state) { 2244 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 2245 dp->pl_config.poll_fixed_state = true; 2246 } 2247 2248 ret = dsa_port_phylink_create(dp); 2249 if (ret) 2250 return ret; 2251 2252 if (ds->ops->get_phy_flags) 2253 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2254 2255 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2256 if (ret == -ENODEV && ds->slave_mii_bus) { 2257 /* We could not connect to a designated PHY or SFP, so try to 2258 * use the switch internal MDIO bus instead 2259 */ 2260 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags); 2261 } 2262 if (ret) { 2263 netdev_err(slave_dev, "failed to connect to PHY: %pe\n", 2264 ERR_PTR(ret)); 2265 phylink_destroy(dp->pl); 2266 } 2267 2268 return ret; 2269 } 2270 2271 void dsa_slave_setup_tagger(struct net_device *slave) 2272 { 2273 struct dsa_port *dp = dsa_slave_to_port(slave); 2274 struct dsa_slave_priv *p = netdev_priv(slave); 2275 const struct dsa_port *cpu_dp = dp->cpu_dp; 2276 struct net_device *master = cpu_dp->master; 2277 const struct dsa_switch *ds = dp->ds; 2278 2279 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2280 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2281 /* Try to save one extra realloc later in the TX path (in the master) 2282 * by also inheriting the master's needed headroom and tailroom. 2283 * The 8021q driver also does this. 2284 */ 2285 slave->needed_headroom += master->needed_headroom; 2286 slave->needed_tailroom += master->needed_tailroom; 2287 2288 p->xmit = cpu_dp->tag_ops->xmit; 2289 2290 slave->features = master->vlan_features | NETIF_F_HW_TC; 2291 slave->hw_features |= NETIF_F_HW_TC; 2292 slave->features |= NETIF_F_LLTX; 2293 if (slave->needed_tailroom) 2294 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2295 if (ds->needs_standalone_vlan_filtering) 2296 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2297 } 2298 2299 int dsa_slave_suspend(struct net_device *slave_dev) 2300 { 2301 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2302 2303 if (!netif_running(slave_dev)) 2304 return 0; 2305 2306 netif_device_detach(slave_dev); 2307 2308 rtnl_lock(); 2309 phylink_stop(dp->pl); 2310 rtnl_unlock(); 2311 2312 return 0; 2313 } 2314 2315 int dsa_slave_resume(struct net_device *slave_dev) 2316 { 2317 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2318 2319 if (!netif_running(slave_dev)) 2320 return 0; 2321 2322 netif_device_attach(slave_dev); 2323 2324 rtnl_lock(); 2325 phylink_start(dp->pl); 2326 rtnl_unlock(); 2327 2328 return 0; 2329 } 2330 2331 int dsa_slave_create(struct dsa_port *port) 2332 { 2333 const struct dsa_port *cpu_dp = port->cpu_dp; 2334 struct net_device *master = cpu_dp->master; 2335 struct dsa_switch *ds = port->ds; 2336 const char *name = port->name; 2337 struct net_device *slave_dev; 2338 struct dsa_slave_priv *p; 2339 int ret; 2340 2341 if (!ds->num_tx_queues) 2342 ds->num_tx_queues = 1; 2343 2344 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 2345 NET_NAME_UNKNOWN, ether_setup, 2346 ds->num_tx_queues, 1); 2347 if (slave_dev == NULL) 2348 return -ENOMEM; 2349 2350 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 2351 #if IS_ENABLED(CONFIG_DCB) 2352 slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops; 2353 #endif 2354 if (!is_zero_ether_addr(port->mac)) 2355 eth_hw_addr_set(slave_dev, port->mac); 2356 else 2357 eth_hw_addr_inherit(slave_dev, master); 2358 slave_dev->priv_flags |= IFF_NO_QUEUE; 2359 if (dsa_switch_supports_uc_filtering(ds)) 2360 slave_dev->priv_flags |= IFF_UNICAST_FLT; 2361 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 2362 if (ds->ops->port_max_mtu) 2363 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2364 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 2365 2366 SET_NETDEV_DEV(slave_dev, port->ds->dev); 2367 slave_dev->dev.of_node = port->dn; 2368 slave_dev->vlan_features = master->vlan_features; 2369 2370 p = netdev_priv(slave_dev); 2371 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2372 if (!slave_dev->tstats) { 2373 free_netdev(slave_dev); 2374 return -ENOMEM; 2375 } 2376 2377 ret = gro_cells_init(&p->gcells, slave_dev); 2378 if (ret) 2379 goto out_free; 2380 2381 p->dp = port; 2382 INIT_LIST_HEAD(&p->mall_tc_list); 2383 port->slave = slave_dev; 2384 dsa_slave_setup_tagger(slave_dev); 2385 2386 netif_carrier_off(slave_dev); 2387 2388 ret = dsa_slave_phy_setup(slave_dev); 2389 if (ret) { 2390 netdev_err(slave_dev, 2391 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2392 ret, ds->dst->index, ds->index, port->index); 2393 goto out_gcells; 2394 } 2395 2396 rtnl_lock(); 2397 2398 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 2399 if (ret && ret != -EOPNOTSUPP) 2400 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2401 ret, ETH_DATA_LEN, port->index); 2402 2403 ret = register_netdevice(slave_dev); 2404 if (ret) { 2405 netdev_err(master, "error %d registering interface %s\n", 2406 ret, slave_dev->name); 2407 rtnl_unlock(); 2408 goto out_phy; 2409 } 2410 2411 if (IS_ENABLED(CONFIG_DCB)) { 2412 ret = dsa_slave_dcbnl_init(slave_dev); 2413 if (ret) { 2414 netdev_err(slave_dev, 2415 "failed to initialize DCB: %pe\n", 2416 ERR_PTR(ret)); 2417 rtnl_unlock(); 2418 goto out_unregister; 2419 } 2420 } 2421 2422 ret = netdev_upper_dev_link(master, slave_dev, NULL); 2423 2424 rtnl_unlock(); 2425 2426 if (ret) 2427 goto out_unregister; 2428 2429 return 0; 2430 2431 out_unregister: 2432 unregister_netdev(slave_dev); 2433 out_phy: 2434 rtnl_lock(); 2435 phylink_disconnect_phy(p->dp->pl); 2436 rtnl_unlock(); 2437 phylink_destroy(p->dp->pl); 2438 out_gcells: 2439 gro_cells_destroy(&p->gcells); 2440 out_free: 2441 free_percpu(slave_dev->tstats); 2442 free_netdev(slave_dev); 2443 port->slave = NULL; 2444 return ret; 2445 } 2446 2447 void dsa_slave_destroy(struct net_device *slave_dev) 2448 { 2449 struct net_device *master = dsa_slave_to_master(slave_dev); 2450 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2451 struct dsa_slave_priv *p = netdev_priv(slave_dev); 2452 2453 netif_carrier_off(slave_dev); 2454 rtnl_lock(); 2455 netdev_upper_dev_unlink(master, slave_dev); 2456 unregister_netdevice(slave_dev); 2457 phylink_disconnect_phy(dp->pl); 2458 rtnl_unlock(); 2459 2460 phylink_destroy(dp->pl); 2461 gro_cells_destroy(&p->gcells); 2462 free_percpu(slave_dev->tstats); 2463 free_netdev(slave_dev); 2464 } 2465 2466 bool dsa_slave_dev_check(const struct net_device *dev) 2467 { 2468 return dev->netdev_ops == &dsa_slave_netdev_ops; 2469 } 2470 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 2471 2472 static int dsa_slave_changeupper(struct net_device *dev, 2473 struct netdev_notifier_changeupper_info *info) 2474 { 2475 struct dsa_port *dp = dsa_slave_to_port(dev); 2476 struct netlink_ext_ack *extack; 2477 int err = NOTIFY_DONE; 2478 2479 extack = netdev_notifier_info_to_extack(&info->info); 2480 2481 if (netif_is_bridge_master(info->upper_dev)) { 2482 if (info->linking) { 2483 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2484 if (!err) 2485 dsa_bridge_mtu_normalization(dp); 2486 if (err == -EOPNOTSUPP) { 2487 if (!extack->_msg) 2488 NL_SET_ERR_MSG_MOD(extack, 2489 "Offloading not supported"); 2490 err = 0; 2491 } 2492 err = notifier_from_errno(err); 2493 } else { 2494 dsa_port_bridge_leave(dp, info->upper_dev); 2495 err = NOTIFY_OK; 2496 } 2497 } else if (netif_is_lag_master(info->upper_dev)) { 2498 if (info->linking) { 2499 err = dsa_port_lag_join(dp, info->upper_dev, 2500 info->upper_info, extack); 2501 if (err == -EOPNOTSUPP) { 2502 NL_SET_ERR_MSG_MOD(info->info.extack, 2503 "Offloading not supported"); 2504 err = 0; 2505 } 2506 err = notifier_from_errno(err); 2507 } else { 2508 dsa_port_lag_leave(dp, info->upper_dev); 2509 err = NOTIFY_OK; 2510 } 2511 } else if (is_hsr_master(info->upper_dev)) { 2512 if (info->linking) { 2513 err = dsa_port_hsr_join(dp, info->upper_dev); 2514 if (err == -EOPNOTSUPP) { 2515 NL_SET_ERR_MSG_MOD(info->info.extack, 2516 "Offloading not supported"); 2517 err = 0; 2518 } 2519 err = notifier_from_errno(err); 2520 } else { 2521 dsa_port_hsr_leave(dp, info->upper_dev); 2522 err = NOTIFY_OK; 2523 } 2524 } 2525 2526 return err; 2527 } 2528 2529 static int dsa_slave_prechangeupper(struct net_device *dev, 2530 struct netdev_notifier_changeupper_info *info) 2531 { 2532 struct dsa_port *dp = dsa_slave_to_port(dev); 2533 2534 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2535 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2536 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2537 dsa_port_pre_lag_leave(dp, info->upper_dev); 2538 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be 2539 * meaningfully enslaved to a bridge yet 2540 */ 2541 2542 return NOTIFY_DONE; 2543 } 2544 2545 static int 2546 dsa_slave_lag_changeupper(struct net_device *dev, 2547 struct netdev_notifier_changeupper_info *info) 2548 { 2549 struct net_device *lower; 2550 struct list_head *iter; 2551 int err = NOTIFY_DONE; 2552 struct dsa_port *dp; 2553 2554 netdev_for_each_lower_dev(dev, lower, iter) { 2555 if (!dsa_slave_dev_check(lower)) 2556 continue; 2557 2558 dp = dsa_slave_to_port(lower); 2559 if (!dp->lag) 2560 /* Software LAG */ 2561 continue; 2562 2563 err = dsa_slave_changeupper(lower, info); 2564 if (notifier_to_errno(err)) 2565 break; 2566 } 2567 2568 return err; 2569 } 2570 2571 /* Same as dsa_slave_lag_changeupper() except that it calls 2572 * dsa_slave_prechangeupper() 2573 */ 2574 static int 2575 dsa_slave_lag_prechangeupper(struct net_device *dev, 2576 struct netdev_notifier_changeupper_info *info) 2577 { 2578 struct net_device *lower; 2579 struct list_head *iter; 2580 int err = NOTIFY_DONE; 2581 struct dsa_port *dp; 2582 2583 netdev_for_each_lower_dev(dev, lower, iter) { 2584 if (!dsa_slave_dev_check(lower)) 2585 continue; 2586 2587 dp = dsa_slave_to_port(lower); 2588 if (!dp->lag) 2589 /* Software LAG */ 2590 continue; 2591 2592 err = dsa_slave_prechangeupper(lower, info); 2593 if (notifier_to_errno(err)) 2594 break; 2595 } 2596 2597 return err; 2598 } 2599 2600 static int 2601 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 2602 struct netdev_notifier_changeupper_info *info) 2603 { 2604 struct netlink_ext_ack *ext_ack; 2605 struct net_device *slave, *br; 2606 struct dsa_port *dp; 2607 2608 ext_ack = netdev_notifier_info_to_extack(&info->info); 2609 2610 if (!is_vlan_dev(dev)) 2611 return NOTIFY_DONE; 2612 2613 slave = vlan_dev_real_dev(dev); 2614 if (!dsa_slave_dev_check(slave)) 2615 return NOTIFY_DONE; 2616 2617 dp = dsa_slave_to_port(slave); 2618 br = dsa_port_bridge_dev_get(dp); 2619 if (!br) 2620 return NOTIFY_DONE; 2621 2622 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 2623 if (br_vlan_enabled(br) && 2624 netif_is_bridge_master(info->upper_dev) && info->linking) { 2625 NL_SET_ERR_MSG_MOD(ext_ack, 2626 "Cannot enslave VLAN device into VLAN aware bridge"); 2627 return notifier_from_errno(-EINVAL); 2628 } 2629 2630 return NOTIFY_DONE; 2631 } 2632 2633 static int 2634 dsa_slave_check_8021q_upper(struct net_device *dev, 2635 struct netdev_notifier_changeupper_info *info) 2636 { 2637 struct dsa_port *dp = dsa_slave_to_port(dev); 2638 struct net_device *br = dsa_port_bridge_dev_get(dp); 2639 struct bridge_vlan_info br_info; 2640 struct netlink_ext_ack *extack; 2641 int err = NOTIFY_DONE; 2642 u16 vid; 2643 2644 if (!br || !br_vlan_enabled(br)) 2645 return NOTIFY_DONE; 2646 2647 extack = netdev_notifier_info_to_extack(&info->info); 2648 vid = vlan_dev_vlan_id(info->upper_dev); 2649 2650 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2651 * device, respectively the VID is not found, returning 2652 * 0 means success, which is a failure for us here. 2653 */ 2654 err = br_vlan_get_info(br, vid, &br_info); 2655 if (err == 0) { 2656 NL_SET_ERR_MSG_MOD(extack, 2657 "This VLAN is already configured by the bridge"); 2658 return notifier_from_errno(-EBUSY); 2659 } 2660 2661 return NOTIFY_DONE; 2662 } 2663 2664 static int 2665 dsa_slave_prechangeupper_sanity_check(struct net_device *dev, 2666 struct netdev_notifier_changeupper_info *info) 2667 { 2668 struct dsa_switch *ds; 2669 struct dsa_port *dp; 2670 int err; 2671 2672 if (!dsa_slave_dev_check(dev)) 2673 return dsa_prevent_bridging_8021q_upper(dev, info); 2674 2675 dp = dsa_slave_to_port(dev); 2676 ds = dp->ds; 2677 2678 if (ds->ops->port_prechangeupper) { 2679 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2680 if (err) 2681 return notifier_from_errno(err); 2682 } 2683 2684 if (is_vlan_dev(info->upper_dev)) 2685 return dsa_slave_check_8021q_upper(dev, info); 2686 2687 return NOTIFY_DONE; 2688 } 2689 2690 static int dsa_slave_netdevice_event(struct notifier_block *nb, 2691 unsigned long event, void *ptr) 2692 { 2693 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2694 2695 switch (event) { 2696 case NETDEV_PRECHANGEUPPER: { 2697 struct netdev_notifier_changeupper_info *info = ptr; 2698 int err; 2699 2700 err = dsa_slave_prechangeupper_sanity_check(dev, info); 2701 if (err != NOTIFY_DONE) 2702 return err; 2703 2704 if (dsa_slave_dev_check(dev)) 2705 return dsa_slave_prechangeupper(dev, ptr); 2706 2707 if (netif_is_lag_master(dev)) 2708 return dsa_slave_lag_prechangeupper(dev, ptr); 2709 2710 break; 2711 } 2712 case NETDEV_CHANGEUPPER: 2713 if (dsa_slave_dev_check(dev)) 2714 return dsa_slave_changeupper(dev, ptr); 2715 2716 if (netif_is_lag_master(dev)) 2717 return dsa_slave_lag_changeupper(dev, ptr); 2718 2719 break; 2720 case NETDEV_CHANGELOWERSTATE: { 2721 struct netdev_notifier_changelowerstate_info *info = ptr; 2722 struct dsa_port *dp; 2723 int err; 2724 2725 if (!dsa_slave_dev_check(dev)) 2726 break; 2727 2728 dp = dsa_slave_to_port(dev); 2729 2730 err = dsa_port_lag_change(dp, info->lower_state_info); 2731 return notifier_from_errno(err); 2732 } 2733 case NETDEV_CHANGE: 2734 case NETDEV_UP: { 2735 /* Track state of master port. 2736 * DSA driver may require the master port (and indirectly 2737 * the tagger) to be available for some special operation. 2738 */ 2739 if (netdev_uses_dsa(dev)) { 2740 struct dsa_port *cpu_dp = dev->dsa_ptr; 2741 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 2742 2743 /* Track when the master port is UP */ 2744 dsa_tree_master_oper_state_change(dst, dev, 2745 netif_oper_up(dev)); 2746 2747 /* Track when the master port is ready and can accept 2748 * packet. 2749 * NETDEV_UP event is not enough to flag a port as ready. 2750 * We also have to wait for linkwatch_do_dev to dev_activate 2751 * and emit a NETDEV_CHANGE event. 2752 * We check if a master port is ready by checking if the dev 2753 * have a qdisc assigned and is not noop. 2754 */ 2755 dsa_tree_master_admin_state_change(dst, dev, 2756 !qdisc_tx_is_noop(dev)); 2757 2758 return NOTIFY_OK; 2759 } 2760 2761 return NOTIFY_DONE; 2762 } 2763 case NETDEV_GOING_DOWN: { 2764 struct dsa_port *dp, *cpu_dp; 2765 struct dsa_switch_tree *dst; 2766 LIST_HEAD(close_list); 2767 2768 if (!netdev_uses_dsa(dev)) 2769 return NOTIFY_DONE; 2770 2771 cpu_dp = dev->dsa_ptr; 2772 dst = cpu_dp->ds->dst; 2773 2774 dsa_tree_master_admin_state_change(dst, dev, false); 2775 2776 list_for_each_entry(dp, &dst->ports, list) { 2777 if (!dsa_port_is_user(dp)) 2778 continue; 2779 2780 list_add(&dp->slave->close_list, &close_list); 2781 } 2782 2783 dev_close_many(&close_list, true); 2784 2785 return NOTIFY_OK; 2786 } 2787 default: 2788 break; 2789 } 2790 2791 return NOTIFY_DONE; 2792 } 2793 2794 static void 2795 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 2796 { 2797 struct switchdev_notifier_fdb_info info = {}; 2798 2799 info.addr = switchdev_work->addr; 2800 info.vid = switchdev_work->vid; 2801 info.offloaded = true; 2802 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 2803 switchdev_work->orig_dev, &info.info, NULL); 2804 } 2805 2806 static void dsa_slave_switchdev_event_work(struct work_struct *work) 2807 { 2808 struct dsa_switchdev_event_work *switchdev_work = 2809 container_of(work, struct dsa_switchdev_event_work, work); 2810 const unsigned char *addr = switchdev_work->addr; 2811 struct net_device *dev = switchdev_work->dev; 2812 u16 vid = switchdev_work->vid; 2813 struct dsa_switch *ds; 2814 struct dsa_port *dp; 2815 int err; 2816 2817 dp = dsa_slave_to_port(dev); 2818 ds = dp->ds; 2819 2820 switch (switchdev_work->event) { 2821 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2822 if (switchdev_work->host_addr) 2823 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 2824 else if (dp->lag) 2825 err = dsa_port_lag_fdb_add(dp, addr, vid); 2826 else 2827 err = dsa_port_fdb_add(dp, addr, vid); 2828 if (err) { 2829 dev_err(ds->dev, 2830 "port %d failed to add %pM vid %d to fdb: %d\n", 2831 dp->index, addr, vid, err); 2832 break; 2833 } 2834 dsa_fdb_offload_notify(switchdev_work); 2835 break; 2836 2837 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2838 if (switchdev_work->host_addr) 2839 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 2840 else if (dp->lag) 2841 err = dsa_port_lag_fdb_del(dp, addr, vid); 2842 else 2843 err = dsa_port_fdb_del(dp, addr, vid); 2844 if (err) { 2845 dev_err(ds->dev, 2846 "port %d failed to delete %pM vid %d from fdb: %d\n", 2847 dp->index, addr, vid, err); 2848 } 2849 2850 break; 2851 } 2852 2853 kfree(switchdev_work); 2854 } 2855 2856 static bool dsa_foreign_dev_check(const struct net_device *dev, 2857 const struct net_device *foreign_dev) 2858 { 2859 const struct dsa_port *dp = dsa_slave_to_port(dev); 2860 struct dsa_switch_tree *dst = dp->ds->dst; 2861 2862 if (netif_is_bridge_master(foreign_dev)) 2863 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 2864 2865 if (netif_is_bridge_port(foreign_dev)) 2866 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 2867 2868 /* Everything else is foreign */ 2869 return true; 2870 } 2871 2872 static int dsa_slave_fdb_event(struct net_device *dev, 2873 struct net_device *orig_dev, 2874 unsigned long event, const void *ctx, 2875 const struct switchdev_notifier_fdb_info *fdb_info) 2876 { 2877 struct dsa_switchdev_event_work *switchdev_work; 2878 struct dsa_port *dp = dsa_slave_to_port(dev); 2879 bool host_addr = fdb_info->is_local; 2880 struct dsa_switch *ds = dp->ds; 2881 2882 if (ctx && ctx != dp) 2883 return 0; 2884 2885 if (!dp->bridge) 2886 return 0; 2887 2888 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 2889 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 2890 return 0; 2891 2892 /* FDB entries learned by the software bridge or by foreign 2893 * bridge ports should be installed as host addresses only if 2894 * the driver requests assisted learning. 2895 */ 2896 if (!ds->assisted_learning_on_cpu_port) 2897 return 0; 2898 } 2899 2900 /* Also treat FDB entries on foreign interfaces bridged with us as host 2901 * addresses. 2902 */ 2903 if (dsa_foreign_dev_check(dev, orig_dev)) 2904 host_addr = true; 2905 2906 /* Check early that we're not doing work in vain. 2907 * Host addresses on LAG ports still require regular FDB ops, 2908 * since the CPU port isn't in a LAG. 2909 */ 2910 if (dp->lag && !host_addr) { 2911 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 2912 return -EOPNOTSUPP; 2913 } else { 2914 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 2915 return -EOPNOTSUPP; 2916 } 2917 2918 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 2919 if (!switchdev_work) 2920 return -ENOMEM; 2921 2922 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 2923 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 2924 orig_dev->name, fdb_info->addr, fdb_info->vid, 2925 host_addr ? " as host address" : ""); 2926 2927 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work); 2928 switchdev_work->event = event; 2929 switchdev_work->dev = dev; 2930 switchdev_work->orig_dev = orig_dev; 2931 2932 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 2933 switchdev_work->vid = fdb_info->vid; 2934 switchdev_work->host_addr = host_addr; 2935 2936 dsa_schedule_work(&switchdev_work->work); 2937 2938 return 0; 2939 } 2940 2941 /* Called under rcu_read_lock() */ 2942 static int dsa_slave_switchdev_event(struct notifier_block *unused, 2943 unsigned long event, void *ptr) 2944 { 2945 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2946 int err; 2947 2948 switch (event) { 2949 case SWITCHDEV_PORT_ATTR_SET: 2950 err = switchdev_handle_port_attr_set(dev, ptr, 2951 dsa_slave_dev_check, 2952 dsa_slave_port_attr_set); 2953 return notifier_from_errno(err); 2954 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2955 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2956 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 2957 dsa_slave_dev_check, 2958 dsa_foreign_dev_check, 2959 dsa_slave_fdb_event); 2960 return notifier_from_errno(err); 2961 default: 2962 return NOTIFY_DONE; 2963 } 2964 2965 return NOTIFY_OK; 2966 } 2967 2968 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 2969 unsigned long event, void *ptr) 2970 { 2971 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2972 int err; 2973 2974 switch (event) { 2975 case SWITCHDEV_PORT_OBJ_ADD: 2976 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 2977 dsa_slave_dev_check, 2978 dsa_foreign_dev_check, 2979 dsa_slave_port_obj_add); 2980 return notifier_from_errno(err); 2981 case SWITCHDEV_PORT_OBJ_DEL: 2982 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 2983 dsa_slave_dev_check, 2984 dsa_foreign_dev_check, 2985 dsa_slave_port_obj_del); 2986 return notifier_from_errno(err); 2987 case SWITCHDEV_PORT_ATTR_SET: 2988 err = switchdev_handle_port_attr_set(dev, ptr, 2989 dsa_slave_dev_check, 2990 dsa_slave_port_attr_set); 2991 return notifier_from_errno(err); 2992 } 2993 2994 return NOTIFY_DONE; 2995 } 2996 2997 static struct notifier_block dsa_slave_nb __read_mostly = { 2998 .notifier_call = dsa_slave_netdevice_event, 2999 }; 3000 3001 struct notifier_block dsa_slave_switchdev_notifier = { 3002 .notifier_call = dsa_slave_switchdev_event, 3003 }; 3004 3005 struct notifier_block dsa_slave_switchdev_blocking_notifier = { 3006 .notifier_call = dsa_slave_switchdev_blocking_event, 3007 }; 3008 3009 int dsa_slave_register_notifier(void) 3010 { 3011 struct notifier_block *nb; 3012 int err; 3013 3014 err = register_netdevice_notifier(&dsa_slave_nb); 3015 if (err) 3016 return err; 3017 3018 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 3019 if (err) 3020 goto err_switchdev_nb; 3021 3022 nb = &dsa_slave_switchdev_blocking_notifier; 3023 err = register_switchdev_blocking_notifier(nb); 3024 if (err) 3025 goto err_switchdev_blocking_nb; 3026 3027 return 0; 3028 3029 err_switchdev_blocking_nb: 3030 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3031 err_switchdev_nb: 3032 unregister_netdevice_notifier(&dsa_slave_nb); 3033 return err; 3034 } 3035 3036 void dsa_slave_unregister_notifier(void) 3037 { 3038 struct notifier_block *nb; 3039 int err; 3040 3041 nb = &dsa_slave_switchdev_blocking_notifier; 3042 err = unregister_switchdev_blocking_notifier(nb); 3043 if (err) 3044 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3045 3046 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3047 if (err) 3048 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3049 3050 err = unregister_netdevice_notifier(&dsa_slave_nb); 3051 if (err) 3052 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 3053 } 3054