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_pauseparam(struct net_device *dev, 1113 struct ethtool_pauseparam *pause) 1114 { 1115 struct dsa_port *dp = dsa_slave_to_port(dev); 1116 1117 phylink_ethtool_get_pauseparam(dp->pl, pause); 1118 } 1119 1120 static int dsa_slave_set_pauseparam(struct net_device *dev, 1121 struct ethtool_pauseparam *pause) 1122 { 1123 struct dsa_port *dp = dsa_slave_to_port(dev); 1124 1125 return phylink_ethtool_set_pauseparam(dp->pl, pause); 1126 } 1127 1128 #ifdef CONFIG_NET_POLL_CONTROLLER 1129 static int dsa_slave_netpoll_setup(struct net_device *dev, 1130 struct netpoll_info *ni) 1131 { 1132 struct net_device *master = dsa_slave_to_master(dev); 1133 struct dsa_slave_priv *p = netdev_priv(dev); 1134 struct netpoll *netpoll; 1135 int err = 0; 1136 1137 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 1138 if (!netpoll) 1139 return -ENOMEM; 1140 1141 err = __netpoll_setup(netpoll, master); 1142 if (err) { 1143 kfree(netpoll); 1144 goto out; 1145 } 1146 1147 p->netpoll = netpoll; 1148 out: 1149 return err; 1150 } 1151 1152 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 1153 { 1154 struct dsa_slave_priv *p = netdev_priv(dev); 1155 struct netpoll *netpoll = p->netpoll; 1156 1157 if (!netpoll) 1158 return; 1159 1160 p->netpoll = NULL; 1161 1162 __netpoll_free(netpoll); 1163 } 1164 1165 static void dsa_slave_poll_controller(struct net_device *dev) 1166 { 1167 } 1168 #endif 1169 1170 static struct dsa_mall_tc_entry * 1171 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 1172 { 1173 struct dsa_slave_priv *p = netdev_priv(dev); 1174 struct dsa_mall_tc_entry *mall_tc_entry; 1175 1176 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1177 if (mall_tc_entry->cookie == cookie) 1178 return mall_tc_entry; 1179 1180 return NULL; 1181 } 1182 1183 static int 1184 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 1185 struct tc_cls_matchall_offload *cls, 1186 bool ingress) 1187 { 1188 struct netlink_ext_ack *extack = cls->common.extack; 1189 struct dsa_port *dp = dsa_slave_to_port(dev); 1190 struct dsa_slave_priv *p = netdev_priv(dev); 1191 struct dsa_mall_mirror_tc_entry *mirror; 1192 struct dsa_mall_tc_entry *mall_tc_entry; 1193 struct dsa_switch *ds = dp->ds; 1194 struct flow_action_entry *act; 1195 struct dsa_port *to_dp; 1196 int err; 1197 1198 if (!ds->ops->port_mirror_add) 1199 return -EOPNOTSUPP; 1200 1201 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1202 cls->common.extack)) 1203 return -EOPNOTSUPP; 1204 1205 act = &cls->rule->action.entries[0]; 1206 1207 if (!act->dev) 1208 return -EINVAL; 1209 1210 if (!dsa_slave_dev_check(act->dev)) 1211 return -EOPNOTSUPP; 1212 1213 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1214 if (!mall_tc_entry) 1215 return -ENOMEM; 1216 1217 mall_tc_entry->cookie = cls->cookie; 1218 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1219 mirror = &mall_tc_entry->mirror; 1220 1221 to_dp = dsa_slave_to_port(act->dev); 1222 1223 mirror->to_local_port = to_dp->index; 1224 mirror->ingress = ingress; 1225 1226 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack); 1227 if (err) { 1228 kfree(mall_tc_entry); 1229 return err; 1230 } 1231 1232 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1233 1234 return err; 1235 } 1236 1237 static int 1238 dsa_slave_add_cls_matchall_police(struct net_device *dev, 1239 struct tc_cls_matchall_offload *cls, 1240 bool ingress) 1241 { 1242 struct netlink_ext_ack *extack = cls->common.extack; 1243 struct dsa_port *dp = dsa_slave_to_port(dev); 1244 struct dsa_slave_priv *p = netdev_priv(dev); 1245 struct dsa_mall_policer_tc_entry *policer; 1246 struct dsa_mall_tc_entry *mall_tc_entry; 1247 struct dsa_switch *ds = dp->ds; 1248 struct flow_action_entry *act; 1249 int err; 1250 1251 if (!ds->ops->port_policer_add) { 1252 NL_SET_ERR_MSG_MOD(extack, 1253 "Policing offload not implemented"); 1254 return -EOPNOTSUPP; 1255 } 1256 1257 if (!ingress) { 1258 NL_SET_ERR_MSG_MOD(extack, 1259 "Only supported on ingress qdisc"); 1260 return -EOPNOTSUPP; 1261 } 1262 1263 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1264 cls->common.extack)) 1265 return -EOPNOTSUPP; 1266 1267 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1268 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1269 NL_SET_ERR_MSG_MOD(extack, 1270 "Only one port policer allowed"); 1271 return -EEXIST; 1272 } 1273 } 1274 1275 act = &cls->rule->action.entries[0]; 1276 1277 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1278 if (!mall_tc_entry) 1279 return -ENOMEM; 1280 1281 mall_tc_entry->cookie = cls->cookie; 1282 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1283 policer = &mall_tc_entry->policer; 1284 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1285 policer->burst = act->police.burst; 1286 1287 err = ds->ops->port_policer_add(ds, dp->index, policer); 1288 if (err) { 1289 kfree(mall_tc_entry); 1290 return err; 1291 } 1292 1293 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1294 1295 return err; 1296 } 1297 1298 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1299 struct tc_cls_matchall_offload *cls, 1300 bool ingress) 1301 { 1302 int err = -EOPNOTSUPP; 1303 1304 if (cls->common.protocol == htons(ETH_P_ALL) && 1305 flow_offload_has_one_action(&cls->rule->action) && 1306 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1307 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1308 else if (flow_offload_has_one_action(&cls->rule->action) && 1309 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1310 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1311 1312 return err; 1313 } 1314 1315 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1316 struct tc_cls_matchall_offload *cls) 1317 { 1318 struct dsa_port *dp = dsa_slave_to_port(dev); 1319 struct dsa_mall_tc_entry *mall_tc_entry; 1320 struct dsa_switch *ds = dp->ds; 1321 1322 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1323 if (!mall_tc_entry) 1324 return; 1325 1326 list_del(&mall_tc_entry->list); 1327 1328 switch (mall_tc_entry->type) { 1329 case DSA_PORT_MALL_MIRROR: 1330 if (ds->ops->port_mirror_del) 1331 ds->ops->port_mirror_del(ds, dp->index, 1332 &mall_tc_entry->mirror); 1333 break; 1334 case DSA_PORT_MALL_POLICER: 1335 if (ds->ops->port_policer_del) 1336 ds->ops->port_policer_del(ds, dp->index); 1337 break; 1338 default: 1339 WARN_ON(1); 1340 } 1341 1342 kfree(mall_tc_entry); 1343 } 1344 1345 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1346 struct tc_cls_matchall_offload *cls, 1347 bool ingress) 1348 { 1349 if (cls->common.chain_index) 1350 return -EOPNOTSUPP; 1351 1352 switch (cls->command) { 1353 case TC_CLSMATCHALL_REPLACE: 1354 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1355 case TC_CLSMATCHALL_DESTROY: 1356 dsa_slave_del_cls_matchall(dev, cls); 1357 return 0; 1358 default: 1359 return -EOPNOTSUPP; 1360 } 1361 } 1362 1363 static int dsa_slave_add_cls_flower(struct net_device *dev, 1364 struct flow_cls_offload *cls, 1365 bool ingress) 1366 { 1367 struct dsa_port *dp = dsa_slave_to_port(dev); 1368 struct dsa_switch *ds = dp->ds; 1369 int port = dp->index; 1370 1371 if (!ds->ops->cls_flower_add) 1372 return -EOPNOTSUPP; 1373 1374 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1375 } 1376 1377 static int dsa_slave_del_cls_flower(struct net_device *dev, 1378 struct flow_cls_offload *cls, 1379 bool ingress) 1380 { 1381 struct dsa_port *dp = dsa_slave_to_port(dev); 1382 struct dsa_switch *ds = dp->ds; 1383 int port = dp->index; 1384 1385 if (!ds->ops->cls_flower_del) 1386 return -EOPNOTSUPP; 1387 1388 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1389 } 1390 1391 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1392 struct flow_cls_offload *cls, 1393 bool ingress) 1394 { 1395 struct dsa_port *dp = dsa_slave_to_port(dev); 1396 struct dsa_switch *ds = dp->ds; 1397 int port = dp->index; 1398 1399 if (!ds->ops->cls_flower_stats) 1400 return -EOPNOTSUPP; 1401 1402 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1403 } 1404 1405 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1406 struct flow_cls_offload *cls, 1407 bool ingress) 1408 { 1409 switch (cls->command) { 1410 case FLOW_CLS_REPLACE: 1411 return dsa_slave_add_cls_flower(dev, cls, ingress); 1412 case FLOW_CLS_DESTROY: 1413 return dsa_slave_del_cls_flower(dev, cls, ingress); 1414 case FLOW_CLS_STATS: 1415 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1416 default: 1417 return -EOPNOTSUPP; 1418 } 1419 } 1420 1421 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1422 void *cb_priv, bool ingress) 1423 { 1424 struct net_device *dev = cb_priv; 1425 1426 if (!tc_can_offload(dev)) 1427 return -EOPNOTSUPP; 1428 1429 switch (type) { 1430 case TC_SETUP_CLSMATCHALL: 1431 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1432 case TC_SETUP_CLSFLOWER: 1433 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1434 default: 1435 return -EOPNOTSUPP; 1436 } 1437 } 1438 1439 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1440 void *type_data, void *cb_priv) 1441 { 1442 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1443 } 1444 1445 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1446 void *type_data, void *cb_priv) 1447 { 1448 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1449 } 1450 1451 static LIST_HEAD(dsa_slave_block_cb_list); 1452 1453 static int dsa_slave_setup_tc_block(struct net_device *dev, 1454 struct flow_block_offload *f) 1455 { 1456 struct flow_block_cb *block_cb; 1457 flow_setup_cb_t *cb; 1458 1459 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1460 cb = dsa_slave_setup_tc_block_cb_ig; 1461 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1462 cb = dsa_slave_setup_tc_block_cb_eg; 1463 else 1464 return -EOPNOTSUPP; 1465 1466 f->driver_block_list = &dsa_slave_block_cb_list; 1467 1468 switch (f->command) { 1469 case FLOW_BLOCK_BIND: 1470 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1471 return -EBUSY; 1472 1473 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1474 if (IS_ERR(block_cb)) 1475 return PTR_ERR(block_cb); 1476 1477 flow_block_cb_add(block_cb, f); 1478 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1479 return 0; 1480 case FLOW_BLOCK_UNBIND: 1481 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1482 if (!block_cb) 1483 return -ENOENT; 1484 1485 flow_block_cb_remove(block_cb, f); 1486 list_del(&block_cb->driver_list); 1487 return 0; 1488 default: 1489 return -EOPNOTSUPP; 1490 } 1491 } 1492 1493 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port, 1494 void *type_data) 1495 { 1496 struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp; 1497 struct net_device *master = cpu_dp->master; 1498 1499 if (!master->netdev_ops->ndo_setup_tc) 1500 return -EOPNOTSUPP; 1501 1502 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data); 1503 } 1504 1505 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1506 void *type_data) 1507 { 1508 struct dsa_port *dp = dsa_slave_to_port(dev); 1509 struct dsa_switch *ds = dp->ds; 1510 1511 switch (type) { 1512 case TC_SETUP_BLOCK: 1513 return dsa_slave_setup_tc_block(dev, type_data); 1514 case TC_SETUP_FT: 1515 return dsa_slave_setup_ft_block(ds, dp->index, type_data); 1516 default: 1517 break; 1518 } 1519 1520 if (!ds->ops->port_setup_tc) 1521 return -EOPNOTSUPP; 1522 1523 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1524 } 1525 1526 static int dsa_slave_get_rxnfc(struct net_device *dev, 1527 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1528 { 1529 struct dsa_port *dp = dsa_slave_to_port(dev); 1530 struct dsa_switch *ds = dp->ds; 1531 1532 if (!ds->ops->get_rxnfc) 1533 return -EOPNOTSUPP; 1534 1535 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1536 } 1537 1538 static int dsa_slave_set_rxnfc(struct net_device *dev, 1539 struct ethtool_rxnfc *nfc) 1540 { 1541 struct dsa_port *dp = dsa_slave_to_port(dev); 1542 struct dsa_switch *ds = dp->ds; 1543 1544 if (!ds->ops->set_rxnfc) 1545 return -EOPNOTSUPP; 1546 1547 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1548 } 1549 1550 static int dsa_slave_get_ts_info(struct net_device *dev, 1551 struct ethtool_ts_info *ts) 1552 { 1553 struct dsa_slave_priv *p = netdev_priv(dev); 1554 struct dsa_switch *ds = p->dp->ds; 1555 1556 if (!ds->ops->get_ts_info) 1557 return -EOPNOTSUPP; 1558 1559 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1560 } 1561 1562 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1563 u16 vid) 1564 { 1565 struct dsa_port *dp = dsa_slave_to_port(dev); 1566 struct switchdev_obj_port_vlan vlan = { 1567 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1568 .vid = vid, 1569 /* This API only allows programming tagged, non-PVID VIDs */ 1570 .flags = 0, 1571 }; 1572 struct netlink_ext_ack extack = {0}; 1573 int ret; 1574 1575 /* User port... */ 1576 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1577 if (ret) { 1578 if (extack._msg) 1579 netdev_err(dev, "%s\n", extack._msg); 1580 return ret; 1581 } 1582 1583 /* And CPU port... */ 1584 ret = dsa_port_host_vlan_add(dp, &vlan, &extack); 1585 if (ret) { 1586 if (extack._msg) 1587 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1588 extack._msg); 1589 return ret; 1590 } 1591 1592 return 0; 1593 } 1594 1595 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1596 u16 vid) 1597 { 1598 struct dsa_port *dp = dsa_slave_to_port(dev); 1599 struct switchdev_obj_port_vlan vlan = { 1600 .vid = vid, 1601 /* This API only allows programming tagged, non-PVID VIDs */ 1602 .flags = 0, 1603 }; 1604 int err; 1605 1606 err = dsa_port_vlan_del(dp, &vlan); 1607 if (err) 1608 return err; 1609 1610 return dsa_port_host_vlan_del(dp, &vlan); 1611 } 1612 1613 static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg) 1614 { 1615 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1616 1617 return dsa_slave_vlan_rx_add_vid(arg, proto, vid); 1618 } 1619 1620 static int dsa_slave_clear_vlan(struct net_device *vdev, int vid, void *arg) 1621 { 1622 __be16 proto = vdev ? vlan_dev_vlan_proto(vdev) : htons(ETH_P_8021Q); 1623 1624 return dsa_slave_vlan_rx_kill_vid(arg, proto, vid); 1625 } 1626 1627 /* Keep the VLAN RX filtering list in sync with the hardware only if VLAN 1628 * filtering is enabled. The baseline is that only ports that offload a 1629 * VLAN-aware bridge are VLAN-aware, and standalone ports are VLAN-unaware, 1630 * but there are exceptions for quirky hardware. 1631 * 1632 * If ds->vlan_filtering_is_global = true, then standalone ports which share 1633 * the same switch with other ports that offload a VLAN-aware bridge are also 1634 * inevitably VLAN-aware. 1635 * 1636 * To summarize, a DSA switch port offloads: 1637 * 1638 * - If standalone (this includes software bridge, software LAG): 1639 * - if ds->needs_standalone_vlan_filtering = true, OR if 1640 * (ds->vlan_filtering_is_global = true AND there are bridges spanning 1641 * this switch chip which have vlan_filtering=1) 1642 * - the 8021q upper VLANs 1643 * - else (standalone VLAN filtering is not needed, VLAN filtering is not 1644 * global, or it is, but no port is under a VLAN-aware bridge): 1645 * - no VLAN (any 8021q upper is a software VLAN) 1646 * 1647 * - If under a vlan_filtering=0 bridge which it offload: 1648 * - if ds->configure_vlan_while_not_filtering = true (default): 1649 * - the bridge VLANs. These VLANs are committed to hardware but inactive. 1650 * - else (deprecated): 1651 * - no VLAN. The bridge VLANs are not restored when VLAN awareness is 1652 * enabled, so this behavior is broken and discouraged. 1653 * 1654 * - If under a vlan_filtering=1 bridge which it offload: 1655 * - the bridge VLANs 1656 * - the 8021q upper VLANs 1657 */ 1658 int dsa_slave_manage_vlan_filtering(struct net_device *slave, 1659 bool vlan_filtering) 1660 { 1661 int err; 1662 1663 if (vlan_filtering) { 1664 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1665 1666 err = vlan_for_each(slave, dsa_slave_restore_vlan, slave); 1667 if (err) { 1668 vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1669 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1670 return err; 1671 } 1672 } else { 1673 err = vlan_for_each(slave, dsa_slave_clear_vlan, slave); 1674 if (err) 1675 return err; 1676 1677 slave->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; 1678 } 1679 1680 return 0; 1681 } 1682 1683 struct dsa_hw_port { 1684 struct list_head list; 1685 struct net_device *dev; 1686 int old_mtu; 1687 }; 1688 1689 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1690 { 1691 const struct dsa_hw_port *p; 1692 int err; 1693 1694 list_for_each_entry(p, hw_port_list, list) { 1695 if (p->dev->mtu == mtu) 1696 continue; 1697 1698 err = dev_set_mtu(p->dev, mtu); 1699 if (err) 1700 goto rollback; 1701 } 1702 1703 return 0; 1704 1705 rollback: 1706 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1707 if (p->dev->mtu == p->old_mtu) 1708 continue; 1709 1710 if (dev_set_mtu(p->dev, p->old_mtu)) 1711 netdev_err(p->dev, "Failed to restore MTU\n"); 1712 } 1713 1714 return err; 1715 } 1716 1717 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1718 { 1719 struct dsa_hw_port *p, *n; 1720 1721 list_for_each_entry_safe(p, n, hw_port_list, list) 1722 kfree(p); 1723 } 1724 1725 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1726 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1727 { 1728 struct list_head hw_port_list; 1729 struct dsa_switch_tree *dst; 1730 int min_mtu = ETH_MAX_MTU; 1731 struct dsa_port *other_dp; 1732 int err; 1733 1734 if (!dp->ds->mtu_enforcement_ingress) 1735 return; 1736 1737 if (!dp->bridge) 1738 return; 1739 1740 INIT_LIST_HEAD(&hw_port_list); 1741 1742 /* Populate the list of ports that are part of the same bridge 1743 * as the newly added/modified port 1744 */ 1745 list_for_each_entry(dst, &dsa_tree_list, list) { 1746 list_for_each_entry(other_dp, &dst->ports, list) { 1747 struct dsa_hw_port *hw_port; 1748 struct net_device *slave; 1749 1750 if (other_dp->type != DSA_PORT_TYPE_USER) 1751 continue; 1752 1753 if (!dsa_port_bridge_same(dp, other_dp)) 1754 continue; 1755 1756 if (!other_dp->ds->mtu_enforcement_ingress) 1757 continue; 1758 1759 slave = other_dp->slave; 1760 1761 if (min_mtu > slave->mtu) 1762 min_mtu = slave->mtu; 1763 1764 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1765 if (!hw_port) 1766 goto out; 1767 1768 hw_port->dev = slave; 1769 hw_port->old_mtu = slave->mtu; 1770 1771 list_add(&hw_port->list, &hw_port_list); 1772 } 1773 } 1774 1775 /* Attempt to configure the entire hardware bridge to the newly added 1776 * interface's MTU first, regardless of whether the intention of the 1777 * user was to raise or lower it. 1778 */ 1779 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1780 if (!err) 1781 goto out; 1782 1783 /* Clearly that didn't work out so well, so just set the minimum MTU on 1784 * all hardware bridge ports now. If this fails too, then all ports will 1785 * still have their old MTU rolled back anyway. 1786 */ 1787 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1788 1789 out: 1790 dsa_hw_port_list_free(&hw_port_list); 1791 } 1792 1793 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1794 { 1795 struct net_device *master = dsa_slave_to_master(dev); 1796 struct dsa_port *dp = dsa_slave_to_port(dev); 1797 struct dsa_port *cpu_dp = dp->cpu_dp; 1798 struct dsa_switch *ds = dp->ds; 1799 struct dsa_port *other_dp; 1800 int largest_mtu = 0; 1801 int new_master_mtu; 1802 int old_master_mtu; 1803 int mtu_limit; 1804 int cpu_mtu; 1805 int err; 1806 1807 if (!ds->ops->port_change_mtu) 1808 return -EOPNOTSUPP; 1809 1810 dsa_tree_for_each_user_port(other_dp, ds->dst) { 1811 int slave_mtu; 1812 1813 /* During probe, this function will be called for each slave 1814 * device, while not all of them have been allocated. That's 1815 * ok, it doesn't change what the maximum is, so ignore it. 1816 */ 1817 if (!other_dp->slave) 1818 continue; 1819 1820 /* Pretend that we already applied the setting, which we 1821 * actually haven't (still haven't done all integrity checks) 1822 */ 1823 if (dp == other_dp) 1824 slave_mtu = new_mtu; 1825 else 1826 slave_mtu = other_dp->slave->mtu; 1827 1828 if (largest_mtu < slave_mtu) 1829 largest_mtu = slave_mtu; 1830 } 1831 1832 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1833 old_master_mtu = master->mtu; 1834 new_master_mtu = largest_mtu + dsa_tag_protocol_overhead(cpu_dp->tag_ops); 1835 if (new_master_mtu > mtu_limit) 1836 return -ERANGE; 1837 1838 /* If the master MTU isn't over limit, there's no need to check the CPU 1839 * MTU, since that surely isn't either. 1840 */ 1841 cpu_mtu = largest_mtu; 1842 1843 /* Start applying stuff */ 1844 if (new_master_mtu != old_master_mtu) { 1845 err = dev_set_mtu(master, new_master_mtu); 1846 if (err < 0) 1847 goto out_master_failed; 1848 1849 /* We only need to propagate the MTU of the CPU port to 1850 * upstream switches, so emit a notifier which updates them. 1851 */ 1852 err = dsa_port_mtu_change(cpu_dp, cpu_mtu); 1853 if (err) 1854 goto out_cpu_failed; 1855 } 1856 1857 err = ds->ops->port_change_mtu(ds, dp->index, new_mtu); 1858 if (err) 1859 goto out_port_failed; 1860 1861 dev->mtu = new_mtu; 1862 1863 dsa_bridge_mtu_normalization(dp); 1864 1865 return 0; 1866 1867 out_port_failed: 1868 if (new_master_mtu != old_master_mtu) 1869 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1870 dsa_tag_protocol_overhead(cpu_dp->tag_ops)); 1871 out_cpu_failed: 1872 if (new_master_mtu != old_master_mtu) 1873 dev_set_mtu(master, old_master_mtu); 1874 out_master_failed: 1875 return err; 1876 } 1877 1878 static int __maybe_unused 1879 dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app) 1880 { 1881 struct dsa_port *dp = dsa_slave_to_port(dev); 1882 struct dsa_switch *ds = dp->ds; 1883 unsigned long mask, new_prio; 1884 int err, port = dp->index; 1885 1886 if (!ds->ops->port_set_default_prio) 1887 return -EOPNOTSUPP; 1888 1889 err = dcb_ieee_setapp(dev, app); 1890 if (err) 1891 return err; 1892 1893 mask = dcb_ieee_getapp_mask(dev, app); 1894 new_prio = __fls(mask); 1895 1896 err = ds->ops->port_set_default_prio(ds, port, new_prio); 1897 if (err) { 1898 dcb_ieee_delapp(dev, app); 1899 return err; 1900 } 1901 1902 return 0; 1903 } 1904 1905 static int __maybe_unused 1906 dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app) 1907 { 1908 struct dsa_port *dp = dsa_slave_to_port(dev); 1909 struct dsa_switch *ds = dp->ds; 1910 unsigned long mask, new_prio; 1911 int err, port = dp->index; 1912 u8 dscp = app->protocol; 1913 1914 if (!ds->ops->port_add_dscp_prio) 1915 return -EOPNOTSUPP; 1916 1917 if (dscp >= 64) { 1918 netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n", 1919 dscp); 1920 return -EINVAL; 1921 } 1922 1923 err = dcb_ieee_setapp(dev, app); 1924 if (err) 1925 return err; 1926 1927 mask = dcb_ieee_getapp_mask(dev, app); 1928 new_prio = __fls(mask); 1929 1930 err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio); 1931 if (err) { 1932 dcb_ieee_delapp(dev, app); 1933 return err; 1934 } 1935 1936 return 0; 1937 } 1938 1939 static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev, 1940 struct dcb_app *app) 1941 { 1942 switch (app->selector) { 1943 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 1944 switch (app->protocol) { 1945 case 0: 1946 return dsa_slave_dcbnl_set_default_prio(dev, app); 1947 default: 1948 return -EOPNOTSUPP; 1949 } 1950 break; 1951 case IEEE_8021QAZ_APP_SEL_DSCP: 1952 return dsa_slave_dcbnl_add_dscp_prio(dev, app); 1953 default: 1954 return -EOPNOTSUPP; 1955 } 1956 } 1957 1958 static int __maybe_unused 1959 dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app) 1960 { 1961 struct dsa_port *dp = dsa_slave_to_port(dev); 1962 struct dsa_switch *ds = dp->ds; 1963 unsigned long mask, new_prio; 1964 int err, port = dp->index; 1965 1966 if (!ds->ops->port_set_default_prio) 1967 return -EOPNOTSUPP; 1968 1969 err = dcb_ieee_delapp(dev, app); 1970 if (err) 1971 return err; 1972 1973 mask = dcb_ieee_getapp_mask(dev, app); 1974 new_prio = mask ? __fls(mask) : 0; 1975 1976 err = ds->ops->port_set_default_prio(ds, port, new_prio); 1977 if (err) { 1978 dcb_ieee_setapp(dev, app); 1979 return err; 1980 } 1981 1982 return 0; 1983 } 1984 1985 static int __maybe_unused 1986 dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app) 1987 { 1988 struct dsa_port *dp = dsa_slave_to_port(dev); 1989 struct dsa_switch *ds = dp->ds; 1990 int err, port = dp->index; 1991 u8 dscp = app->protocol; 1992 1993 if (!ds->ops->port_del_dscp_prio) 1994 return -EOPNOTSUPP; 1995 1996 err = dcb_ieee_delapp(dev, app); 1997 if (err) 1998 return err; 1999 2000 err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority); 2001 if (err) { 2002 dcb_ieee_setapp(dev, app); 2003 return err; 2004 } 2005 2006 return 0; 2007 } 2008 2009 static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev, 2010 struct dcb_app *app) 2011 { 2012 switch (app->selector) { 2013 case IEEE_8021QAZ_APP_SEL_ETHERTYPE: 2014 switch (app->protocol) { 2015 case 0: 2016 return dsa_slave_dcbnl_del_default_prio(dev, app); 2017 default: 2018 return -EOPNOTSUPP; 2019 } 2020 break; 2021 case IEEE_8021QAZ_APP_SEL_DSCP: 2022 return dsa_slave_dcbnl_del_dscp_prio(dev, app); 2023 default: 2024 return -EOPNOTSUPP; 2025 } 2026 } 2027 2028 /* Pre-populate the DCB application priority table with the priorities 2029 * configured during switch setup, which we read from hardware here. 2030 */ 2031 static int dsa_slave_dcbnl_init(struct net_device *dev) 2032 { 2033 struct dsa_port *dp = dsa_slave_to_port(dev); 2034 struct dsa_switch *ds = dp->ds; 2035 int port = dp->index; 2036 int err; 2037 2038 if (ds->ops->port_get_default_prio) { 2039 int prio = ds->ops->port_get_default_prio(ds, port); 2040 struct dcb_app app = { 2041 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE, 2042 .protocol = 0, 2043 .priority = prio, 2044 }; 2045 2046 if (prio < 0) 2047 return prio; 2048 2049 err = dcb_ieee_setapp(dev, &app); 2050 if (err) 2051 return err; 2052 } 2053 2054 if (ds->ops->port_get_dscp_prio) { 2055 int protocol; 2056 2057 for (protocol = 0; protocol < 64; protocol++) { 2058 struct dcb_app app = { 2059 .selector = IEEE_8021QAZ_APP_SEL_DSCP, 2060 .protocol = protocol, 2061 }; 2062 int prio; 2063 2064 prio = ds->ops->port_get_dscp_prio(ds, port, protocol); 2065 if (prio == -EOPNOTSUPP) 2066 continue; 2067 if (prio < 0) 2068 return prio; 2069 2070 app.priority = prio; 2071 2072 err = dcb_ieee_setapp(dev, &app); 2073 if (err) 2074 return err; 2075 } 2076 } 2077 2078 return 0; 2079 } 2080 2081 static const struct ethtool_ops dsa_slave_ethtool_ops = { 2082 .get_drvinfo = dsa_slave_get_drvinfo, 2083 .get_regs_len = dsa_slave_get_regs_len, 2084 .get_regs = dsa_slave_get_regs, 2085 .nway_reset = dsa_slave_nway_reset, 2086 .get_link = ethtool_op_get_link, 2087 .get_eeprom_len = dsa_slave_get_eeprom_len, 2088 .get_eeprom = dsa_slave_get_eeprom, 2089 .set_eeprom = dsa_slave_set_eeprom, 2090 .get_strings = dsa_slave_get_strings, 2091 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 2092 .get_sset_count = dsa_slave_get_sset_count, 2093 .get_eth_phy_stats = dsa_slave_get_eth_phy_stats, 2094 .get_eth_mac_stats = dsa_slave_get_eth_mac_stats, 2095 .get_eth_ctrl_stats = dsa_slave_get_eth_ctrl_stats, 2096 .get_rmon_stats = dsa_slave_get_rmon_stats, 2097 .set_wol = dsa_slave_set_wol, 2098 .get_wol = dsa_slave_get_wol, 2099 .set_eee = dsa_slave_set_eee, 2100 .get_eee = dsa_slave_get_eee, 2101 .get_link_ksettings = dsa_slave_get_link_ksettings, 2102 .set_link_ksettings = dsa_slave_set_link_ksettings, 2103 .get_pauseparam = dsa_slave_get_pauseparam, 2104 .set_pauseparam = dsa_slave_set_pauseparam, 2105 .get_rxnfc = dsa_slave_get_rxnfc, 2106 .set_rxnfc = dsa_slave_set_rxnfc, 2107 .get_ts_info = dsa_slave_get_ts_info, 2108 .self_test = dsa_slave_net_selftest, 2109 }; 2110 2111 static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = { 2112 .ieee_setapp = dsa_slave_dcbnl_ieee_setapp, 2113 .ieee_delapp = dsa_slave_dcbnl_ieee_delapp, 2114 }; 2115 2116 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) 2117 { 2118 struct dsa_port *dp = dsa_slave_to_port(dev); 2119 2120 return &dp->devlink_port; 2121 } 2122 2123 static void dsa_slave_get_stats64(struct net_device *dev, 2124 struct rtnl_link_stats64 *s) 2125 { 2126 struct dsa_port *dp = dsa_slave_to_port(dev); 2127 struct dsa_switch *ds = dp->ds; 2128 2129 if (ds->ops->get_stats64) 2130 ds->ops->get_stats64(ds, dp->index, s); 2131 else 2132 dev_get_tstats64(dev, s); 2133 } 2134 2135 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, 2136 struct net_device_path *path) 2137 { 2138 struct dsa_port *dp = dsa_slave_to_port(ctx->dev); 2139 struct dsa_port *cpu_dp = dp->cpu_dp; 2140 2141 path->dev = ctx->dev; 2142 path->type = DEV_PATH_DSA; 2143 path->dsa.proto = cpu_dp->tag_ops->proto; 2144 path->dsa.port = dp->index; 2145 ctx->dev = cpu_dp->master; 2146 2147 return 0; 2148 } 2149 2150 static const struct net_device_ops dsa_slave_netdev_ops = { 2151 .ndo_open = dsa_slave_open, 2152 .ndo_stop = dsa_slave_close, 2153 .ndo_start_xmit = dsa_slave_xmit, 2154 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 2155 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 2156 .ndo_set_mac_address = dsa_slave_set_mac_address, 2157 .ndo_fdb_dump = dsa_slave_fdb_dump, 2158 .ndo_eth_ioctl = dsa_slave_ioctl, 2159 .ndo_get_iflink = dsa_slave_get_iflink, 2160 #ifdef CONFIG_NET_POLL_CONTROLLER 2161 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 2162 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 2163 .ndo_poll_controller = dsa_slave_poll_controller, 2164 #endif 2165 .ndo_setup_tc = dsa_slave_setup_tc, 2166 .ndo_get_stats64 = dsa_slave_get_stats64, 2167 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 2168 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 2169 .ndo_get_devlink_port = dsa_slave_get_devlink_port, 2170 .ndo_change_mtu = dsa_slave_change_mtu, 2171 .ndo_fill_forward_path = dsa_slave_fill_forward_path, 2172 }; 2173 2174 static struct device_type dsa_type = { 2175 .name = "dsa", 2176 }; 2177 2178 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 2179 { 2180 const struct dsa_port *dp = dsa_to_port(ds, port); 2181 2182 if (dp->pl) 2183 phylink_mac_change(dp->pl, up); 2184 } 2185 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 2186 2187 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 2188 struct phylink_link_state *state) 2189 { 2190 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 2191 struct dsa_switch *ds = dp->ds; 2192 2193 /* No need to check that this operation is valid, the callback would 2194 * not be called if it was not. 2195 */ 2196 ds->ops->phylink_fixed_state(ds, dp->index, state); 2197 } 2198 2199 /* slave device setup *******************************************************/ 2200 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr, 2201 u32 flags) 2202 { 2203 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2204 struct dsa_switch *ds = dp->ds; 2205 2206 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 2207 if (!slave_dev->phydev) { 2208 netdev_err(slave_dev, "no phy at %d\n", addr); 2209 return -ENODEV; 2210 } 2211 2212 slave_dev->phydev->dev_flags |= flags; 2213 2214 return phylink_connect_phy(dp->pl, slave_dev->phydev); 2215 } 2216 2217 static int dsa_slave_phy_setup(struct net_device *slave_dev) 2218 { 2219 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2220 struct device_node *port_dn = dp->dn; 2221 struct dsa_switch *ds = dp->ds; 2222 u32 phy_flags = 0; 2223 int ret; 2224 2225 dp->pl_config.dev = &slave_dev->dev; 2226 dp->pl_config.type = PHYLINK_NETDEV; 2227 2228 /* The get_fixed_state callback takes precedence over polling the 2229 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 2230 * this if the switch provides such a callback. 2231 */ 2232 if (ds->ops->phylink_fixed_state) { 2233 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 2234 dp->pl_config.poll_fixed_state = true; 2235 } 2236 2237 ret = dsa_port_phylink_create(dp); 2238 if (ret) 2239 return ret; 2240 2241 if (ds->ops->get_phy_flags) 2242 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 2243 2244 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 2245 if (ret == -ENODEV && ds->slave_mii_bus) { 2246 /* We could not connect to a designated PHY or SFP, so try to 2247 * use the switch internal MDIO bus instead 2248 */ 2249 ret = dsa_slave_phy_connect(slave_dev, dp->index, phy_flags); 2250 } 2251 if (ret) { 2252 netdev_err(slave_dev, "failed to connect to PHY: %pe\n", 2253 ERR_PTR(ret)); 2254 phylink_destroy(dp->pl); 2255 } 2256 2257 return ret; 2258 } 2259 2260 void dsa_slave_setup_tagger(struct net_device *slave) 2261 { 2262 struct dsa_port *dp = dsa_slave_to_port(slave); 2263 struct dsa_slave_priv *p = netdev_priv(slave); 2264 const struct dsa_port *cpu_dp = dp->cpu_dp; 2265 struct net_device *master = cpu_dp->master; 2266 const struct dsa_switch *ds = dp->ds; 2267 2268 slave->needed_headroom = cpu_dp->tag_ops->needed_headroom; 2269 slave->needed_tailroom = cpu_dp->tag_ops->needed_tailroom; 2270 /* Try to save one extra realloc later in the TX path (in the master) 2271 * by also inheriting the master's needed headroom and tailroom. 2272 * The 8021q driver also does this. 2273 */ 2274 slave->needed_headroom += master->needed_headroom; 2275 slave->needed_tailroom += master->needed_tailroom; 2276 2277 p->xmit = cpu_dp->tag_ops->xmit; 2278 2279 slave->features = master->vlan_features | NETIF_F_HW_TC; 2280 slave->hw_features |= NETIF_F_HW_TC; 2281 slave->features |= NETIF_F_LLTX; 2282 if (slave->needed_tailroom) 2283 slave->features &= ~(NETIF_F_SG | NETIF_F_FRAGLIST); 2284 if (ds->needs_standalone_vlan_filtering) 2285 slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2286 } 2287 2288 int dsa_slave_suspend(struct net_device *slave_dev) 2289 { 2290 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2291 2292 if (!netif_running(slave_dev)) 2293 return 0; 2294 2295 netif_device_detach(slave_dev); 2296 2297 rtnl_lock(); 2298 phylink_stop(dp->pl); 2299 rtnl_unlock(); 2300 2301 return 0; 2302 } 2303 2304 int dsa_slave_resume(struct net_device *slave_dev) 2305 { 2306 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2307 2308 if (!netif_running(slave_dev)) 2309 return 0; 2310 2311 netif_device_attach(slave_dev); 2312 2313 rtnl_lock(); 2314 phylink_start(dp->pl); 2315 rtnl_unlock(); 2316 2317 return 0; 2318 } 2319 2320 int dsa_slave_create(struct dsa_port *port) 2321 { 2322 const struct dsa_port *cpu_dp = port->cpu_dp; 2323 struct net_device *master = cpu_dp->master; 2324 struct dsa_switch *ds = port->ds; 2325 const char *name = port->name; 2326 struct net_device *slave_dev; 2327 struct dsa_slave_priv *p; 2328 int ret; 2329 2330 if (!ds->num_tx_queues) 2331 ds->num_tx_queues = 1; 2332 2333 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 2334 NET_NAME_UNKNOWN, ether_setup, 2335 ds->num_tx_queues, 1); 2336 if (slave_dev == NULL) 2337 return -ENOMEM; 2338 2339 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 2340 #if IS_ENABLED(CONFIG_DCB) 2341 slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops; 2342 #endif 2343 if (!is_zero_ether_addr(port->mac)) 2344 eth_hw_addr_set(slave_dev, port->mac); 2345 else 2346 eth_hw_addr_inherit(slave_dev, master); 2347 slave_dev->priv_flags |= IFF_NO_QUEUE; 2348 if (dsa_switch_supports_uc_filtering(ds)) 2349 slave_dev->priv_flags |= IFF_UNICAST_FLT; 2350 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 2351 if (ds->ops->port_max_mtu) 2352 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 2353 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 2354 2355 SET_NETDEV_DEV(slave_dev, port->ds->dev); 2356 slave_dev->dev.of_node = port->dn; 2357 slave_dev->vlan_features = master->vlan_features; 2358 2359 p = netdev_priv(slave_dev); 2360 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 2361 if (!slave_dev->tstats) { 2362 free_netdev(slave_dev); 2363 return -ENOMEM; 2364 } 2365 2366 ret = gro_cells_init(&p->gcells, slave_dev); 2367 if (ret) 2368 goto out_free; 2369 2370 p->dp = port; 2371 INIT_LIST_HEAD(&p->mall_tc_list); 2372 port->slave = slave_dev; 2373 dsa_slave_setup_tagger(slave_dev); 2374 2375 netif_carrier_off(slave_dev); 2376 2377 ret = dsa_slave_phy_setup(slave_dev); 2378 if (ret) { 2379 netdev_err(slave_dev, 2380 "error %d setting up PHY for tree %d, switch %d, port %d\n", 2381 ret, ds->dst->index, ds->index, port->index); 2382 goto out_gcells; 2383 } 2384 2385 rtnl_lock(); 2386 2387 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 2388 if (ret && ret != -EOPNOTSUPP) 2389 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 2390 ret, ETH_DATA_LEN, port->index); 2391 2392 ret = register_netdevice(slave_dev); 2393 if (ret) { 2394 netdev_err(master, "error %d registering interface %s\n", 2395 ret, slave_dev->name); 2396 rtnl_unlock(); 2397 goto out_phy; 2398 } 2399 2400 if (IS_ENABLED(CONFIG_DCB)) { 2401 ret = dsa_slave_dcbnl_init(slave_dev); 2402 if (ret) { 2403 netdev_err(slave_dev, 2404 "failed to initialize DCB: %pe\n", 2405 ERR_PTR(ret)); 2406 rtnl_unlock(); 2407 goto out_unregister; 2408 } 2409 } 2410 2411 ret = netdev_upper_dev_link(master, slave_dev, NULL); 2412 2413 rtnl_unlock(); 2414 2415 if (ret) 2416 goto out_unregister; 2417 2418 return 0; 2419 2420 out_unregister: 2421 unregister_netdev(slave_dev); 2422 out_phy: 2423 rtnl_lock(); 2424 phylink_disconnect_phy(p->dp->pl); 2425 rtnl_unlock(); 2426 phylink_destroy(p->dp->pl); 2427 out_gcells: 2428 gro_cells_destroy(&p->gcells); 2429 out_free: 2430 free_percpu(slave_dev->tstats); 2431 free_netdev(slave_dev); 2432 port->slave = NULL; 2433 return ret; 2434 } 2435 2436 void dsa_slave_destroy(struct net_device *slave_dev) 2437 { 2438 struct net_device *master = dsa_slave_to_master(slave_dev); 2439 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2440 struct dsa_slave_priv *p = netdev_priv(slave_dev); 2441 2442 netif_carrier_off(slave_dev); 2443 rtnl_lock(); 2444 netdev_upper_dev_unlink(master, slave_dev); 2445 unregister_netdevice(slave_dev); 2446 phylink_disconnect_phy(dp->pl); 2447 rtnl_unlock(); 2448 2449 phylink_destroy(dp->pl); 2450 gro_cells_destroy(&p->gcells); 2451 free_percpu(slave_dev->tstats); 2452 free_netdev(slave_dev); 2453 } 2454 2455 bool dsa_slave_dev_check(const struct net_device *dev) 2456 { 2457 return dev->netdev_ops == &dsa_slave_netdev_ops; 2458 } 2459 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 2460 2461 static int dsa_slave_changeupper(struct net_device *dev, 2462 struct netdev_notifier_changeupper_info *info) 2463 { 2464 struct dsa_port *dp = dsa_slave_to_port(dev); 2465 struct netlink_ext_ack *extack; 2466 int err = NOTIFY_DONE; 2467 2468 extack = netdev_notifier_info_to_extack(&info->info); 2469 2470 if (netif_is_bridge_master(info->upper_dev)) { 2471 if (info->linking) { 2472 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2473 if (!err) 2474 dsa_bridge_mtu_normalization(dp); 2475 if (err == -EOPNOTSUPP) { 2476 if (!extack->_msg) 2477 NL_SET_ERR_MSG_MOD(extack, 2478 "Offloading not supported"); 2479 err = 0; 2480 } 2481 err = notifier_from_errno(err); 2482 } else { 2483 dsa_port_bridge_leave(dp, info->upper_dev); 2484 err = NOTIFY_OK; 2485 } 2486 } else if (netif_is_lag_master(info->upper_dev)) { 2487 if (info->linking) { 2488 err = dsa_port_lag_join(dp, info->upper_dev, 2489 info->upper_info, extack); 2490 if (err == -EOPNOTSUPP) { 2491 NL_SET_ERR_MSG_MOD(info->info.extack, 2492 "Offloading not supported"); 2493 err = 0; 2494 } 2495 err = notifier_from_errno(err); 2496 } else { 2497 dsa_port_lag_leave(dp, info->upper_dev); 2498 err = NOTIFY_OK; 2499 } 2500 } else if (is_hsr_master(info->upper_dev)) { 2501 if (info->linking) { 2502 err = dsa_port_hsr_join(dp, info->upper_dev); 2503 if (err == -EOPNOTSUPP) { 2504 NL_SET_ERR_MSG_MOD(info->info.extack, 2505 "Offloading not supported"); 2506 err = 0; 2507 } 2508 err = notifier_from_errno(err); 2509 } else { 2510 dsa_port_hsr_leave(dp, info->upper_dev); 2511 err = NOTIFY_OK; 2512 } 2513 } 2514 2515 return err; 2516 } 2517 2518 static int dsa_slave_prechangeupper(struct net_device *dev, 2519 struct netdev_notifier_changeupper_info *info) 2520 { 2521 struct dsa_port *dp = dsa_slave_to_port(dev); 2522 2523 if (netif_is_bridge_master(info->upper_dev) && !info->linking) 2524 dsa_port_pre_bridge_leave(dp, info->upper_dev); 2525 else if (netif_is_lag_master(info->upper_dev) && !info->linking) 2526 dsa_port_pre_lag_leave(dp, info->upper_dev); 2527 /* dsa_port_pre_hsr_leave is not yet necessary since hsr cannot be 2528 * meaningfully enslaved to a bridge yet 2529 */ 2530 2531 return NOTIFY_DONE; 2532 } 2533 2534 static int 2535 dsa_slave_lag_changeupper(struct net_device *dev, 2536 struct netdev_notifier_changeupper_info *info) 2537 { 2538 struct net_device *lower; 2539 struct list_head *iter; 2540 int err = NOTIFY_DONE; 2541 struct dsa_port *dp; 2542 2543 netdev_for_each_lower_dev(dev, lower, iter) { 2544 if (!dsa_slave_dev_check(lower)) 2545 continue; 2546 2547 dp = dsa_slave_to_port(lower); 2548 if (!dp->lag) 2549 /* Software LAG */ 2550 continue; 2551 2552 err = dsa_slave_changeupper(lower, info); 2553 if (notifier_to_errno(err)) 2554 break; 2555 } 2556 2557 return err; 2558 } 2559 2560 /* Same as dsa_slave_lag_changeupper() except that it calls 2561 * dsa_slave_prechangeupper() 2562 */ 2563 static int 2564 dsa_slave_lag_prechangeupper(struct net_device *dev, 2565 struct netdev_notifier_changeupper_info *info) 2566 { 2567 struct net_device *lower; 2568 struct list_head *iter; 2569 int err = NOTIFY_DONE; 2570 struct dsa_port *dp; 2571 2572 netdev_for_each_lower_dev(dev, lower, iter) { 2573 if (!dsa_slave_dev_check(lower)) 2574 continue; 2575 2576 dp = dsa_slave_to_port(lower); 2577 if (!dp->lag) 2578 /* Software LAG */ 2579 continue; 2580 2581 err = dsa_slave_prechangeupper(lower, info); 2582 if (notifier_to_errno(err)) 2583 break; 2584 } 2585 2586 return err; 2587 } 2588 2589 static int 2590 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 2591 struct netdev_notifier_changeupper_info *info) 2592 { 2593 struct netlink_ext_ack *ext_ack; 2594 struct net_device *slave, *br; 2595 struct dsa_port *dp; 2596 2597 ext_ack = netdev_notifier_info_to_extack(&info->info); 2598 2599 if (!is_vlan_dev(dev)) 2600 return NOTIFY_DONE; 2601 2602 slave = vlan_dev_real_dev(dev); 2603 if (!dsa_slave_dev_check(slave)) 2604 return NOTIFY_DONE; 2605 2606 dp = dsa_slave_to_port(slave); 2607 br = dsa_port_bridge_dev_get(dp); 2608 if (!br) 2609 return NOTIFY_DONE; 2610 2611 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 2612 if (br_vlan_enabled(br) && 2613 netif_is_bridge_master(info->upper_dev) && info->linking) { 2614 NL_SET_ERR_MSG_MOD(ext_ack, 2615 "Cannot enslave VLAN device into VLAN aware bridge"); 2616 return notifier_from_errno(-EINVAL); 2617 } 2618 2619 return NOTIFY_DONE; 2620 } 2621 2622 static int 2623 dsa_slave_check_8021q_upper(struct net_device *dev, 2624 struct netdev_notifier_changeupper_info *info) 2625 { 2626 struct dsa_port *dp = dsa_slave_to_port(dev); 2627 struct net_device *br = dsa_port_bridge_dev_get(dp); 2628 struct bridge_vlan_info br_info; 2629 struct netlink_ext_ack *extack; 2630 int err = NOTIFY_DONE; 2631 u16 vid; 2632 2633 if (!br || !br_vlan_enabled(br)) 2634 return NOTIFY_DONE; 2635 2636 extack = netdev_notifier_info_to_extack(&info->info); 2637 vid = vlan_dev_vlan_id(info->upper_dev); 2638 2639 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2640 * device, respectively the VID is not found, returning 2641 * 0 means success, which is a failure for us here. 2642 */ 2643 err = br_vlan_get_info(br, vid, &br_info); 2644 if (err == 0) { 2645 NL_SET_ERR_MSG_MOD(extack, 2646 "This VLAN is already configured by the bridge"); 2647 return notifier_from_errno(-EBUSY); 2648 } 2649 2650 return NOTIFY_DONE; 2651 } 2652 2653 static int 2654 dsa_slave_prechangeupper_sanity_check(struct net_device *dev, 2655 struct netdev_notifier_changeupper_info *info) 2656 { 2657 struct dsa_switch *ds; 2658 struct dsa_port *dp; 2659 int err; 2660 2661 if (!dsa_slave_dev_check(dev)) 2662 return dsa_prevent_bridging_8021q_upper(dev, info); 2663 2664 dp = dsa_slave_to_port(dev); 2665 ds = dp->ds; 2666 2667 if (ds->ops->port_prechangeupper) { 2668 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2669 if (err) 2670 return notifier_from_errno(err); 2671 } 2672 2673 if (is_vlan_dev(info->upper_dev)) 2674 return dsa_slave_check_8021q_upper(dev, info); 2675 2676 return NOTIFY_DONE; 2677 } 2678 2679 static int dsa_slave_netdevice_event(struct notifier_block *nb, 2680 unsigned long event, void *ptr) 2681 { 2682 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2683 2684 switch (event) { 2685 case NETDEV_PRECHANGEUPPER: { 2686 struct netdev_notifier_changeupper_info *info = ptr; 2687 int err; 2688 2689 err = dsa_slave_prechangeupper_sanity_check(dev, info); 2690 if (err != NOTIFY_DONE) 2691 return err; 2692 2693 if (dsa_slave_dev_check(dev)) 2694 return dsa_slave_prechangeupper(dev, ptr); 2695 2696 if (netif_is_lag_master(dev)) 2697 return dsa_slave_lag_prechangeupper(dev, ptr); 2698 2699 break; 2700 } 2701 case NETDEV_CHANGEUPPER: 2702 if (dsa_slave_dev_check(dev)) 2703 return dsa_slave_changeupper(dev, ptr); 2704 2705 if (netif_is_lag_master(dev)) 2706 return dsa_slave_lag_changeupper(dev, ptr); 2707 2708 break; 2709 case NETDEV_CHANGELOWERSTATE: { 2710 struct netdev_notifier_changelowerstate_info *info = ptr; 2711 struct dsa_port *dp; 2712 int err; 2713 2714 if (!dsa_slave_dev_check(dev)) 2715 break; 2716 2717 dp = dsa_slave_to_port(dev); 2718 2719 err = dsa_port_lag_change(dp, info->lower_state_info); 2720 return notifier_from_errno(err); 2721 } 2722 case NETDEV_CHANGE: 2723 case NETDEV_UP: { 2724 /* Track state of master port. 2725 * DSA driver may require the master port (and indirectly 2726 * the tagger) to be available for some special operation. 2727 */ 2728 if (netdev_uses_dsa(dev)) { 2729 struct dsa_port *cpu_dp = dev->dsa_ptr; 2730 struct dsa_switch_tree *dst = cpu_dp->ds->dst; 2731 2732 /* Track when the master port is UP */ 2733 dsa_tree_master_oper_state_change(dst, dev, 2734 netif_oper_up(dev)); 2735 2736 /* Track when the master port is ready and can accept 2737 * packet. 2738 * NETDEV_UP event is not enough to flag a port as ready. 2739 * We also have to wait for linkwatch_do_dev to dev_activate 2740 * and emit a NETDEV_CHANGE event. 2741 * We check if a master port is ready by checking if the dev 2742 * have a qdisc assigned and is not noop. 2743 */ 2744 dsa_tree_master_admin_state_change(dst, dev, 2745 !qdisc_tx_is_noop(dev)); 2746 2747 return NOTIFY_OK; 2748 } 2749 2750 return NOTIFY_DONE; 2751 } 2752 case NETDEV_GOING_DOWN: { 2753 struct dsa_port *dp, *cpu_dp; 2754 struct dsa_switch_tree *dst; 2755 LIST_HEAD(close_list); 2756 2757 if (!netdev_uses_dsa(dev)) 2758 return NOTIFY_DONE; 2759 2760 cpu_dp = dev->dsa_ptr; 2761 dst = cpu_dp->ds->dst; 2762 2763 dsa_tree_master_admin_state_change(dst, dev, false); 2764 2765 list_for_each_entry(dp, &dst->ports, list) { 2766 if (!dsa_port_is_user(dp)) 2767 continue; 2768 2769 list_add(&dp->slave->close_list, &close_list); 2770 } 2771 2772 dev_close_many(&close_list, true); 2773 2774 return NOTIFY_OK; 2775 } 2776 default: 2777 break; 2778 } 2779 2780 return NOTIFY_DONE; 2781 } 2782 2783 static void 2784 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 2785 { 2786 struct switchdev_notifier_fdb_info info = {}; 2787 2788 info.addr = switchdev_work->addr; 2789 info.vid = switchdev_work->vid; 2790 info.offloaded = true; 2791 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 2792 switchdev_work->orig_dev, &info.info, NULL); 2793 } 2794 2795 static void dsa_slave_switchdev_event_work(struct work_struct *work) 2796 { 2797 struct dsa_switchdev_event_work *switchdev_work = 2798 container_of(work, struct dsa_switchdev_event_work, work); 2799 const unsigned char *addr = switchdev_work->addr; 2800 struct net_device *dev = switchdev_work->dev; 2801 u16 vid = switchdev_work->vid; 2802 struct dsa_switch *ds; 2803 struct dsa_port *dp; 2804 int err; 2805 2806 dp = dsa_slave_to_port(dev); 2807 ds = dp->ds; 2808 2809 switch (switchdev_work->event) { 2810 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2811 if (switchdev_work->host_addr) 2812 err = dsa_port_bridge_host_fdb_add(dp, addr, vid); 2813 else if (dp->lag) 2814 err = dsa_port_lag_fdb_add(dp, addr, vid); 2815 else 2816 err = dsa_port_fdb_add(dp, addr, vid); 2817 if (err) { 2818 dev_err(ds->dev, 2819 "port %d failed to add %pM vid %d to fdb: %d\n", 2820 dp->index, addr, vid, err); 2821 break; 2822 } 2823 dsa_fdb_offload_notify(switchdev_work); 2824 break; 2825 2826 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2827 if (switchdev_work->host_addr) 2828 err = dsa_port_bridge_host_fdb_del(dp, addr, vid); 2829 else if (dp->lag) 2830 err = dsa_port_lag_fdb_del(dp, addr, vid); 2831 else 2832 err = dsa_port_fdb_del(dp, addr, vid); 2833 if (err) { 2834 dev_err(ds->dev, 2835 "port %d failed to delete %pM vid %d from fdb: %d\n", 2836 dp->index, addr, vid, err); 2837 } 2838 2839 break; 2840 } 2841 2842 kfree(switchdev_work); 2843 } 2844 2845 static bool dsa_foreign_dev_check(const struct net_device *dev, 2846 const struct net_device *foreign_dev) 2847 { 2848 const struct dsa_port *dp = dsa_slave_to_port(dev); 2849 struct dsa_switch_tree *dst = dp->ds->dst; 2850 2851 if (netif_is_bridge_master(foreign_dev)) 2852 return !dsa_tree_offloads_bridge_dev(dst, foreign_dev); 2853 2854 if (netif_is_bridge_port(foreign_dev)) 2855 return !dsa_tree_offloads_bridge_port(dst, foreign_dev); 2856 2857 /* Everything else is foreign */ 2858 return true; 2859 } 2860 2861 static int dsa_slave_fdb_event(struct net_device *dev, 2862 struct net_device *orig_dev, 2863 unsigned long event, const void *ctx, 2864 const struct switchdev_notifier_fdb_info *fdb_info) 2865 { 2866 struct dsa_switchdev_event_work *switchdev_work; 2867 struct dsa_port *dp = dsa_slave_to_port(dev); 2868 bool host_addr = fdb_info->is_local; 2869 struct dsa_switch *ds = dp->ds; 2870 2871 if (ctx && ctx != dp) 2872 return 0; 2873 2874 if (!dp->bridge) 2875 return 0; 2876 2877 if (switchdev_fdb_is_dynamically_learned(fdb_info)) { 2878 if (dsa_port_offloads_bridge_port(dp, orig_dev)) 2879 return 0; 2880 2881 /* FDB entries learned by the software bridge or by foreign 2882 * bridge ports should be installed as host addresses only if 2883 * the driver requests assisted learning. 2884 */ 2885 if (!ds->assisted_learning_on_cpu_port) 2886 return 0; 2887 } 2888 2889 /* Also treat FDB entries on foreign interfaces bridged with us as host 2890 * addresses. 2891 */ 2892 if (dsa_foreign_dev_check(dev, orig_dev)) 2893 host_addr = true; 2894 2895 /* Check early that we're not doing work in vain. 2896 * Host addresses on LAG ports still require regular FDB ops, 2897 * since the CPU port isn't in a LAG. 2898 */ 2899 if (dp->lag && !host_addr) { 2900 if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del) 2901 return -EOPNOTSUPP; 2902 } else { 2903 if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del) 2904 return -EOPNOTSUPP; 2905 } 2906 2907 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 2908 if (!switchdev_work) 2909 return -ENOMEM; 2910 2911 netdev_dbg(dev, "%s FDB entry towards %s, addr %pM vid %d%s\n", 2912 event == SWITCHDEV_FDB_ADD_TO_DEVICE ? "Adding" : "Deleting", 2913 orig_dev->name, fdb_info->addr, fdb_info->vid, 2914 host_addr ? " as host address" : ""); 2915 2916 INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work); 2917 switchdev_work->event = event; 2918 switchdev_work->dev = dev; 2919 switchdev_work->orig_dev = orig_dev; 2920 2921 ether_addr_copy(switchdev_work->addr, fdb_info->addr); 2922 switchdev_work->vid = fdb_info->vid; 2923 switchdev_work->host_addr = host_addr; 2924 2925 dsa_schedule_work(&switchdev_work->work); 2926 2927 return 0; 2928 } 2929 2930 /* Called under rcu_read_lock() */ 2931 static int dsa_slave_switchdev_event(struct notifier_block *unused, 2932 unsigned long event, void *ptr) 2933 { 2934 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2935 int err; 2936 2937 switch (event) { 2938 case SWITCHDEV_PORT_ATTR_SET: 2939 err = switchdev_handle_port_attr_set(dev, ptr, 2940 dsa_slave_dev_check, 2941 dsa_slave_port_attr_set); 2942 return notifier_from_errno(err); 2943 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2944 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2945 err = switchdev_handle_fdb_event_to_device(dev, event, ptr, 2946 dsa_slave_dev_check, 2947 dsa_foreign_dev_check, 2948 dsa_slave_fdb_event); 2949 return notifier_from_errno(err); 2950 default: 2951 return NOTIFY_DONE; 2952 } 2953 2954 return NOTIFY_OK; 2955 } 2956 2957 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 2958 unsigned long event, void *ptr) 2959 { 2960 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2961 int err; 2962 2963 switch (event) { 2964 case SWITCHDEV_PORT_OBJ_ADD: 2965 err = switchdev_handle_port_obj_add_foreign(dev, ptr, 2966 dsa_slave_dev_check, 2967 dsa_foreign_dev_check, 2968 dsa_slave_port_obj_add); 2969 return notifier_from_errno(err); 2970 case SWITCHDEV_PORT_OBJ_DEL: 2971 err = switchdev_handle_port_obj_del_foreign(dev, ptr, 2972 dsa_slave_dev_check, 2973 dsa_foreign_dev_check, 2974 dsa_slave_port_obj_del); 2975 return notifier_from_errno(err); 2976 case SWITCHDEV_PORT_ATTR_SET: 2977 err = switchdev_handle_port_attr_set(dev, ptr, 2978 dsa_slave_dev_check, 2979 dsa_slave_port_attr_set); 2980 return notifier_from_errno(err); 2981 } 2982 2983 return NOTIFY_DONE; 2984 } 2985 2986 static struct notifier_block dsa_slave_nb __read_mostly = { 2987 .notifier_call = dsa_slave_netdevice_event, 2988 }; 2989 2990 struct notifier_block dsa_slave_switchdev_notifier = { 2991 .notifier_call = dsa_slave_switchdev_event, 2992 }; 2993 2994 struct notifier_block dsa_slave_switchdev_blocking_notifier = { 2995 .notifier_call = dsa_slave_switchdev_blocking_event, 2996 }; 2997 2998 int dsa_slave_register_notifier(void) 2999 { 3000 struct notifier_block *nb; 3001 int err; 3002 3003 err = register_netdevice_notifier(&dsa_slave_nb); 3004 if (err) 3005 return err; 3006 3007 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 3008 if (err) 3009 goto err_switchdev_nb; 3010 3011 nb = &dsa_slave_switchdev_blocking_notifier; 3012 err = register_switchdev_blocking_notifier(nb); 3013 if (err) 3014 goto err_switchdev_blocking_nb; 3015 3016 return 0; 3017 3018 err_switchdev_blocking_nb: 3019 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3020 err_switchdev_nb: 3021 unregister_netdevice_notifier(&dsa_slave_nb); 3022 return err; 3023 } 3024 3025 void dsa_slave_unregister_notifier(void) 3026 { 3027 struct notifier_block *nb; 3028 int err; 3029 3030 nb = &dsa_slave_switchdev_blocking_notifier; 3031 err = unregister_switchdev_blocking_notifier(nb); 3032 if (err) 3033 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 3034 3035 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 3036 if (err) 3037 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 3038 3039 err = unregister_netdevice_notifier(&dsa_slave_nb); 3040 if (err) 3041 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 3042 } 3043