1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/dsa/slave.c - Slave device handling 4 * Copyright (c) 2008-2009 Marvell Semiconductor 5 */ 6 7 #include <linux/list.h> 8 #include <linux/etherdevice.h> 9 #include <linux/netdevice.h> 10 #include <linux/phy.h> 11 #include <linux/phy_fixed.h> 12 #include <linux/phylink.h> 13 #include <linux/of_net.h> 14 #include <linux/of_mdio.h> 15 #include <linux/mdio.h> 16 #include <net/rtnetlink.h> 17 #include <net/pkt_cls.h> 18 #include <net/selftests.h> 19 #include <net/tc_act/tc_mirred.h> 20 #include <linux/if_bridge.h> 21 #include <linux/if_hsr.h> 22 #include <linux/netpoll.h> 23 #include <linux/ptp_classify.h> 24 25 #include "dsa_priv.h" 26 27 /* slave mii_bus handling ***************************************************/ 28 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 29 { 30 struct dsa_switch *ds = bus->priv; 31 32 if (ds->phys_mii_mask & (1 << addr)) 33 return ds->ops->phy_read(ds, addr, reg); 34 35 return 0xffff; 36 } 37 38 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 39 { 40 struct dsa_switch *ds = bus->priv; 41 42 if (ds->phys_mii_mask & (1 << addr)) 43 return ds->ops->phy_write(ds, addr, reg, val); 44 45 return 0; 46 } 47 48 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 49 { 50 ds->slave_mii_bus->priv = (void *)ds; 51 ds->slave_mii_bus->name = "dsa slave smi"; 52 ds->slave_mii_bus->read = dsa_slave_phy_read; 53 ds->slave_mii_bus->write = dsa_slave_phy_write; 54 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 55 ds->dst->index, ds->index); 56 ds->slave_mii_bus->parent = ds->dev; 57 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 58 } 59 60 61 /* slave device handling ****************************************************/ 62 static int dsa_slave_get_iflink(const struct net_device *dev) 63 { 64 return dsa_slave_to_master(dev)->ifindex; 65 } 66 67 static int dsa_slave_open(struct net_device *dev) 68 { 69 struct net_device *master = dsa_slave_to_master(dev); 70 struct dsa_port *dp = dsa_slave_to_port(dev); 71 int err; 72 73 err = dev_open(master, NULL); 74 if (err < 0) { 75 netdev_err(dev, "failed to open master %s\n", master->name); 76 goto out; 77 } 78 79 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 80 err = dev_uc_add(master, dev->dev_addr); 81 if (err < 0) 82 goto out; 83 } 84 85 if (dev->flags & IFF_ALLMULTI) { 86 err = dev_set_allmulti(master, 1); 87 if (err < 0) 88 goto del_unicast; 89 } 90 if (dev->flags & IFF_PROMISC) { 91 err = dev_set_promiscuity(master, 1); 92 if (err < 0) 93 goto clear_allmulti; 94 } 95 96 err = dsa_port_enable_rt(dp, dev->phydev); 97 if (err) 98 goto clear_promisc; 99 100 return 0; 101 102 clear_promisc: 103 if (dev->flags & IFF_PROMISC) 104 dev_set_promiscuity(master, -1); 105 clear_allmulti: 106 if (dev->flags & IFF_ALLMULTI) 107 dev_set_allmulti(master, -1); 108 del_unicast: 109 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 110 dev_uc_del(master, dev->dev_addr); 111 out: 112 return err; 113 } 114 115 static int dsa_slave_close(struct net_device *dev) 116 { 117 struct net_device *master = dsa_slave_to_master(dev); 118 struct dsa_port *dp = dsa_slave_to_port(dev); 119 120 dsa_port_disable_rt(dp); 121 122 dev_mc_unsync(master, dev); 123 dev_uc_unsync(master, dev); 124 if (dev->flags & IFF_ALLMULTI) 125 dev_set_allmulti(master, -1); 126 if (dev->flags & IFF_PROMISC) 127 dev_set_promiscuity(master, -1); 128 129 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 130 dev_uc_del(master, dev->dev_addr); 131 132 return 0; 133 } 134 135 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 136 { 137 struct net_device *master = dsa_slave_to_master(dev); 138 if (dev->flags & IFF_UP) { 139 if (change & IFF_ALLMULTI) 140 dev_set_allmulti(master, 141 dev->flags & IFF_ALLMULTI ? 1 : -1); 142 if (change & IFF_PROMISC) 143 dev_set_promiscuity(master, 144 dev->flags & IFF_PROMISC ? 1 : -1); 145 } 146 } 147 148 static void dsa_slave_set_rx_mode(struct net_device *dev) 149 { 150 struct net_device *master = dsa_slave_to_master(dev); 151 152 dev_mc_sync(master, dev); 153 dev_uc_sync(master, dev); 154 } 155 156 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 157 { 158 struct net_device *master = dsa_slave_to_master(dev); 159 struct sockaddr *addr = a; 160 int err; 161 162 if (!is_valid_ether_addr(addr->sa_data)) 163 return -EADDRNOTAVAIL; 164 165 if (!(dev->flags & IFF_UP)) 166 goto out; 167 168 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 169 err = dev_uc_add(master, addr->sa_data); 170 if (err < 0) 171 return err; 172 } 173 174 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 175 dev_uc_del(master, dev->dev_addr); 176 177 out: 178 ether_addr_copy(dev->dev_addr, addr->sa_data); 179 180 return 0; 181 } 182 183 struct dsa_slave_dump_ctx { 184 struct net_device *dev; 185 struct sk_buff *skb; 186 struct netlink_callback *cb; 187 int idx; 188 }; 189 190 static int 191 dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid, 192 bool is_static, void *data) 193 { 194 struct dsa_slave_dump_ctx *dump = data; 195 u32 portid = NETLINK_CB(dump->cb->skb).portid; 196 u32 seq = dump->cb->nlh->nlmsg_seq; 197 struct nlmsghdr *nlh; 198 struct ndmsg *ndm; 199 200 if (dump->idx < dump->cb->args[2]) 201 goto skip; 202 203 nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH, 204 sizeof(*ndm), NLM_F_MULTI); 205 if (!nlh) 206 return -EMSGSIZE; 207 208 ndm = nlmsg_data(nlh); 209 ndm->ndm_family = AF_BRIDGE; 210 ndm->ndm_pad1 = 0; 211 ndm->ndm_pad2 = 0; 212 ndm->ndm_flags = NTF_SELF; 213 ndm->ndm_type = 0; 214 ndm->ndm_ifindex = dump->dev->ifindex; 215 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 216 217 if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr)) 218 goto nla_put_failure; 219 220 if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid)) 221 goto nla_put_failure; 222 223 nlmsg_end(dump->skb, nlh); 224 225 skip: 226 dump->idx++; 227 return 0; 228 229 nla_put_failure: 230 nlmsg_cancel(dump->skb, nlh); 231 return -EMSGSIZE; 232 } 233 234 static int 235 dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 236 struct net_device *dev, struct net_device *filter_dev, 237 int *idx) 238 { 239 struct dsa_port *dp = dsa_slave_to_port(dev); 240 struct dsa_slave_dump_ctx dump = { 241 .dev = dev, 242 .skb = skb, 243 .cb = cb, 244 .idx = *idx, 245 }; 246 int err; 247 248 err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump); 249 *idx = dump.idx; 250 251 return err; 252 } 253 254 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 255 { 256 struct dsa_slave_priv *p = netdev_priv(dev); 257 struct dsa_switch *ds = p->dp->ds; 258 int port = p->dp->index; 259 260 /* Pass through to switch driver if it supports timestamping */ 261 switch (cmd) { 262 case SIOCGHWTSTAMP: 263 if (ds->ops->port_hwtstamp_get) 264 return ds->ops->port_hwtstamp_get(ds, port, ifr); 265 break; 266 case SIOCSHWTSTAMP: 267 if (ds->ops->port_hwtstamp_set) 268 return ds->ops->port_hwtstamp_set(ds, port, ifr); 269 break; 270 } 271 272 return phylink_mii_ioctl(p->dp->pl, ifr, cmd); 273 } 274 275 static int dsa_slave_port_attr_set(struct net_device *dev, 276 const struct switchdev_attr *attr, 277 struct netlink_ext_ack *extack) 278 { 279 struct dsa_port *dp = dsa_slave_to_port(dev); 280 int ret; 281 282 switch (attr->id) { 283 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 284 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 285 return -EOPNOTSUPP; 286 287 ret = dsa_port_set_state(dp, attr->u.stp_state); 288 break; 289 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 290 if (!dsa_port_offloads_bridge(dp, attr->orig_dev)) 291 return -EOPNOTSUPP; 292 293 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 294 extack); 295 break; 296 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 297 if (!dsa_port_offloads_bridge(dp, attr->orig_dev)) 298 return -EOPNOTSUPP; 299 300 ret = dsa_port_ageing_time(dp, attr->u.ageing_time); 301 break; 302 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 303 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 304 return -EOPNOTSUPP; 305 306 ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags, 307 extack); 308 break; 309 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 310 if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev)) 311 return -EOPNOTSUPP; 312 313 ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack); 314 break; 315 case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER: 316 if (!dsa_port_offloads_bridge(dp, attr->orig_dev)) 317 return -EOPNOTSUPP; 318 319 ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, extack); 320 break; 321 default: 322 ret = -EOPNOTSUPP; 323 break; 324 } 325 326 return ret; 327 } 328 329 /* Must be called under rcu_read_lock() */ 330 static int 331 dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave, 332 const struct switchdev_obj_port_vlan *vlan) 333 { 334 struct net_device *upper_dev; 335 struct list_head *iter; 336 337 netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) { 338 u16 vid; 339 340 if (!is_vlan_dev(upper_dev)) 341 continue; 342 343 vid = vlan_dev_vlan_id(upper_dev); 344 if (vid == vlan->vid) 345 return -EBUSY; 346 } 347 348 return 0; 349 } 350 351 static int dsa_slave_vlan_add(struct net_device *dev, 352 const struct switchdev_obj *obj, 353 struct netlink_ext_ack *extack) 354 { 355 struct net_device *master = dsa_slave_to_master(dev); 356 struct dsa_port *dp = dsa_slave_to_port(dev); 357 struct switchdev_obj_port_vlan vlan; 358 int err; 359 360 if (dsa_port_skip_vlan_configuration(dp)) { 361 NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); 362 return 0; 363 } 364 365 vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); 366 367 /* Deny adding a bridge VLAN when there is already an 802.1Q upper with 368 * the same VID. 369 */ 370 if (br_vlan_enabled(dp->bridge_dev)) { 371 rcu_read_lock(); 372 err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan); 373 rcu_read_unlock(); 374 if (err) { 375 NL_SET_ERR_MSG_MOD(extack, 376 "Port already has a VLAN upper with this VID"); 377 return err; 378 } 379 } 380 381 err = dsa_port_vlan_add(dp, &vlan, extack); 382 if (err) 383 return err; 384 385 /* We need the dedicated CPU port to be a member of the VLAN as well. 386 * Even though drivers often handle CPU membership in special ways, 387 * it doesn't make sense to program a PVID, so clear this flag. 388 */ 389 vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; 390 391 err = dsa_port_vlan_add(dp->cpu_dp, &vlan, extack); 392 if (err) 393 return err; 394 395 return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid); 396 } 397 398 static int dsa_slave_port_obj_add(struct net_device *dev, 399 const struct switchdev_obj *obj, 400 struct netlink_ext_ack *extack) 401 { 402 struct dsa_port *dp = dsa_slave_to_port(dev); 403 int err; 404 405 switch (obj->id) { 406 case SWITCHDEV_OBJ_ID_PORT_MDB: 407 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 408 return -EOPNOTSUPP; 409 410 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 411 break; 412 case SWITCHDEV_OBJ_ID_HOST_MDB: 413 if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) 414 return -EOPNOTSUPP; 415 416 /* DSA can directly translate this to a normal MDB add, 417 * but on the CPU port. 418 */ 419 err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 420 break; 421 case SWITCHDEV_OBJ_ID_PORT_VLAN: 422 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 423 return -EOPNOTSUPP; 424 425 err = dsa_slave_vlan_add(dev, obj, extack); 426 break; 427 case SWITCHDEV_OBJ_ID_MRP: 428 if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) 429 return -EOPNOTSUPP; 430 431 err = dsa_port_mrp_add(dp, SWITCHDEV_OBJ_MRP(obj)); 432 break; 433 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 434 if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) 435 return -EOPNOTSUPP; 436 437 err = dsa_port_mrp_add_ring_role(dp, 438 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 439 break; 440 default: 441 err = -EOPNOTSUPP; 442 break; 443 } 444 445 return err; 446 } 447 448 static int dsa_slave_vlan_del(struct net_device *dev, 449 const struct switchdev_obj *obj) 450 { 451 struct net_device *master = dsa_slave_to_master(dev); 452 struct dsa_port *dp = dsa_slave_to_port(dev); 453 struct switchdev_obj_port_vlan *vlan; 454 int err; 455 456 if (dsa_port_skip_vlan_configuration(dp)) 457 return 0; 458 459 vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 460 461 /* Do not deprogram the CPU port as it may be shared with other user 462 * ports which can be members of this VLAN as well. 463 */ 464 err = dsa_port_vlan_del(dp, vlan); 465 if (err) 466 return err; 467 468 vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid); 469 470 return 0; 471 } 472 473 static int dsa_slave_port_obj_del(struct net_device *dev, 474 const struct switchdev_obj *obj) 475 { 476 struct dsa_port *dp = dsa_slave_to_port(dev); 477 int err; 478 479 switch (obj->id) { 480 case SWITCHDEV_OBJ_ID_PORT_MDB: 481 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 482 return -EOPNOTSUPP; 483 484 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 485 break; 486 case SWITCHDEV_OBJ_ID_HOST_MDB: 487 if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) 488 return -EOPNOTSUPP; 489 490 /* DSA can directly translate this to a normal MDB add, 491 * but on the CPU port. 492 */ 493 err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 494 break; 495 case SWITCHDEV_OBJ_ID_PORT_VLAN: 496 if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) 497 return -EOPNOTSUPP; 498 499 err = dsa_slave_vlan_del(dev, obj); 500 break; 501 case SWITCHDEV_OBJ_ID_MRP: 502 if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) 503 return -EOPNOTSUPP; 504 505 err = dsa_port_mrp_del(dp, SWITCHDEV_OBJ_MRP(obj)); 506 break; 507 case SWITCHDEV_OBJ_ID_RING_ROLE_MRP: 508 if (!dsa_port_offloads_bridge(dp, obj->orig_dev)) 509 return -EOPNOTSUPP; 510 511 err = dsa_port_mrp_del_ring_role(dp, 512 SWITCHDEV_OBJ_RING_ROLE_MRP(obj)); 513 break; 514 default: 515 err = -EOPNOTSUPP; 516 break; 517 } 518 519 return err; 520 } 521 522 static int dsa_slave_get_port_parent_id(struct net_device *dev, 523 struct netdev_phys_item_id *ppid) 524 { 525 struct dsa_port *dp = dsa_slave_to_port(dev); 526 struct dsa_switch *ds = dp->ds; 527 struct dsa_switch_tree *dst = ds->dst; 528 529 /* For non-legacy ports, devlink is used and it takes 530 * care of the name generation. This ndo implementation 531 * should be removed with legacy support. 532 */ 533 if (dp->ds->devlink) 534 return -EOPNOTSUPP; 535 536 ppid->id_len = sizeof(dst->index); 537 memcpy(&ppid->id, &dst->index, ppid->id_len); 538 539 return 0; 540 } 541 542 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev, 543 struct sk_buff *skb) 544 { 545 #ifdef CONFIG_NET_POLL_CONTROLLER 546 struct dsa_slave_priv *p = netdev_priv(dev); 547 548 return netpoll_send_skb(p->netpoll, skb); 549 #else 550 BUG(); 551 return NETDEV_TX_OK; 552 #endif 553 } 554 555 static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p, 556 struct sk_buff *skb) 557 { 558 struct dsa_switch *ds = p->dp->ds; 559 struct sk_buff *clone; 560 unsigned int type; 561 562 type = ptp_classify_raw(skb); 563 if (type == PTP_CLASS_NONE) 564 return; 565 566 if (!ds->ops->port_txtstamp) 567 return; 568 569 clone = skb_clone_sk(skb); 570 if (!clone) 571 return; 572 573 if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type)) { 574 DSA_SKB_CB(skb)->clone = clone; 575 return; 576 } 577 578 kfree_skb(clone); 579 } 580 581 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev) 582 { 583 /* SKB for netpoll still need to be mangled with the protocol-specific 584 * tag to be successfully transmitted 585 */ 586 if (unlikely(netpoll_tx_running(dev))) 587 return dsa_slave_netpoll_send_skb(dev, skb); 588 589 /* Queue the SKB for transmission on the parent interface, but 590 * do not modify its EtherType 591 */ 592 skb->dev = dsa_slave_to_master(dev); 593 dev_queue_xmit(skb); 594 595 return NETDEV_TX_OK; 596 } 597 EXPORT_SYMBOL_GPL(dsa_enqueue_skb); 598 599 static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev) 600 { 601 int needed_headroom = dev->needed_headroom; 602 int needed_tailroom = dev->needed_tailroom; 603 604 /* For tail taggers, we need to pad short frames ourselves, to ensure 605 * that the tail tag does not fail at its role of being at the end of 606 * the packet, once the master interface pads the frame. Account for 607 * that pad length here, and pad later. 608 */ 609 if (unlikely(needed_tailroom && skb->len < ETH_ZLEN)) 610 needed_tailroom += ETH_ZLEN - skb->len; 611 /* skb_headroom() returns unsigned int... */ 612 needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0); 613 needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0); 614 615 if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb))) 616 /* No reallocation needed, yay! */ 617 return 0; 618 619 return pskb_expand_head(skb, needed_headroom, needed_tailroom, 620 GFP_ATOMIC); 621 } 622 623 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 624 { 625 struct dsa_slave_priv *p = netdev_priv(dev); 626 struct sk_buff *nskb; 627 628 dev_sw_netstats_tx_add(dev, 1, skb->len); 629 630 DSA_SKB_CB(skb)->clone = NULL; 631 632 /* Identify PTP protocol packets, clone them, and pass them to the 633 * switch driver 634 */ 635 dsa_skb_tx_timestamp(p, skb); 636 637 if (dsa_realloc_skb(skb, dev)) { 638 dev_kfree_skb_any(skb); 639 return NETDEV_TX_OK; 640 } 641 642 /* needed_tailroom should still be 'warm' in the cache line from 643 * dsa_realloc_skb(), which has also ensured that padding is safe. 644 */ 645 if (dev->needed_tailroom) 646 eth_skb_pad(skb); 647 648 /* Transmit function may have to reallocate the original SKB, 649 * in which case it must have freed it. Only free it here on error. 650 */ 651 nskb = p->xmit(skb, dev); 652 if (!nskb) { 653 kfree_skb(skb); 654 return NETDEV_TX_OK; 655 } 656 657 return dsa_enqueue_skb(nskb, dev); 658 } 659 660 /* ethtool operations *******************************************************/ 661 662 static void dsa_slave_get_drvinfo(struct net_device *dev, 663 struct ethtool_drvinfo *drvinfo) 664 { 665 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 666 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 667 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 668 } 669 670 static int dsa_slave_get_regs_len(struct net_device *dev) 671 { 672 struct dsa_port *dp = dsa_slave_to_port(dev); 673 struct dsa_switch *ds = dp->ds; 674 675 if (ds->ops->get_regs_len) 676 return ds->ops->get_regs_len(ds, dp->index); 677 678 return -EOPNOTSUPP; 679 } 680 681 static void 682 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 683 { 684 struct dsa_port *dp = dsa_slave_to_port(dev); 685 struct dsa_switch *ds = dp->ds; 686 687 if (ds->ops->get_regs) 688 ds->ops->get_regs(ds, dp->index, regs, _p); 689 } 690 691 static int dsa_slave_nway_reset(struct net_device *dev) 692 { 693 struct dsa_port *dp = dsa_slave_to_port(dev); 694 695 return phylink_ethtool_nway_reset(dp->pl); 696 } 697 698 static int dsa_slave_get_eeprom_len(struct net_device *dev) 699 { 700 struct dsa_port *dp = dsa_slave_to_port(dev); 701 struct dsa_switch *ds = dp->ds; 702 703 if (ds->cd && ds->cd->eeprom_len) 704 return ds->cd->eeprom_len; 705 706 if (ds->ops->get_eeprom_len) 707 return ds->ops->get_eeprom_len(ds); 708 709 return 0; 710 } 711 712 static int dsa_slave_get_eeprom(struct net_device *dev, 713 struct ethtool_eeprom *eeprom, u8 *data) 714 { 715 struct dsa_port *dp = dsa_slave_to_port(dev); 716 struct dsa_switch *ds = dp->ds; 717 718 if (ds->ops->get_eeprom) 719 return ds->ops->get_eeprom(ds, eeprom, data); 720 721 return -EOPNOTSUPP; 722 } 723 724 static int dsa_slave_set_eeprom(struct net_device *dev, 725 struct ethtool_eeprom *eeprom, u8 *data) 726 { 727 struct dsa_port *dp = dsa_slave_to_port(dev); 728 struct dsa_switch *ds = dp->ds; 729 730 if (ds->ops->set_eeprom) 731 return ds->ops->set_eeprom(ds, eeprom, data); 732 733 return -EOPNOTSUPP; 734 } 735 736 static void dsa_slave_get_strings(struct net_device *dev, 737 uint32_t stringset, uint8_t *data) 738 { 739 struct dsa_port *dp = dsa_slave_to_port(dev); 740 struct dsa_switch *ds = dp->ds; 741 742 if (stringset == ETH_SS_STATS) { 743 int len = ETH_GSTRING_LEN; 744 745 strncpy(data, "tx_packets", len); 746 strncpy(data + len, "tx_bytes", len); 747 strncpy(data + 2 * len, "rx_packets", len); 748 strncpy(data + 3 * len, "rx_bytes", len); 749 if (ds->ops->get_strings) 750 ds->ops->get_strings(ds, dp->index, stringset, 751 data + 4 * len); 752 } else if (stringset == ETH_SS_TEST) { 753 net_selftest_get_strings(data); 754 } 755 756 } 757 758 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 759 struct ethtool_stats *stats, 760 uint64_t *data) 761 { 762 struct dsa_port *dp = dsa_slave_to_port(dev); 763 struct dsa_switch *ds = dp->ds; 764 struct pcpu_sw_netstats *s; 765 unsigned int start; 766 int i; 767 768 for_each_possible_cpu(i) { 769 u64 tx_packets, tx_bytes, rx_packets, rx_bytes; 770 771 s = per_cpu_ptr(dev->tstats, i); 772 do { 773 start = u64_stats_fetch_begin_irq(&s->syncp); 774 tx_packets = s->tx_packets; 775 tx_bytes = s->tx_bytes; 776 rx_packets = s->rx_packets; 777 rx_bytes = s->rx_bytes; 778 } while (u64_stats_fetch_retry_irq(&s->syncp, start)); 779 data[0] += tx_packets; 780 data[1] += tx_bytes; 781 data[2] += rx_packets; 782 data[3] += rx_bytes; 783 } 784 if (ds->ops->get_ethtool_stats) 785 ds->ops->get_ethtool_stats(ds, dp->index, data + 4); 786 } 787 788 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 789 { 790 struct dsa_port *dp = dsa_slave_to_port(dev); 791 struct dsa_switch *ds = dp->ds; 792 793 if (sset == ETH_SS_STATS) { 794 int count; 795 796 count = 4; 797 if (ds->ops->get_sset_count) 798 count += ds->ops->get_sset_count(ds, dp->index, sset); 799 800 return count; 801 } else if (sset == ETH_SS_TEST) { 802 return net_selftest_get_count(); 803 } 804 805 return -EOPNOTSUPP; 806 } 807 808 static void dsa_slave_net_selftest(struct net_device *ndev, 809 struct ethtool_test *etest, u64 *buf) 810 { 811 struct dsa_port *dp = dsa_slave_to_port(ndev); 812 struct dsa_switch *ds = dp->ds; 813 814 if (ds->ops->self_test) { 815 ds->ops->self_test(ds, dp->index, etest, buf); 816 return; 817 } 818 819 net_selftest(ndev, etest, buf); 820 } 821 822 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 823 { 824 struct dsa_port *dp = dsa_slave_to_port(dev); 825 struct dsa_switch *ds = dp->ds; 826 827 phylink_ethtool_get_wol(dp->pl, w); 828 829 if (ds->ops->get_wol) 830 ds->ops->get_wol(ds, dp->index, w); 831 } 832 833 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 834 { 835 struct dsa_port *dp = dsa_slave_to_port(dev); 836 struct dsa_switch *ds = dp->ds; 837 int ret = -EOPNOTSUPP; 838 839 phylink_ethtool_set_wol(dp->pl, w); 840 841 if (ds->ops->set_wol) 842 ret = ds->ops->set_wol(ds, dp->index, w); 843 844 return ret; 845 } 846 847 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 848 { 849 struct dsa_port *dp = dsa_slave_to_port(dev); 850 struct dsa_switch *ds = dp->ds; 851 int ret; 852 853 /* Port's PHY and MAC both need to be EEE capable */ 854 if (!dev->phydev || !dp->pl) 855 return -ENODEV; 856 857 if (!ds->ops->set_mac_eee) 858 return -EOPNOTSUPP; 859 860 ret = ds->ops->set_mac_eee(ds, dp->index, e); 861 if (ret) 862 return ret; 863 864 return phylink_ethtool_set_eee(dp->pl, e); 865 } 866 867 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 868 { 869 struct dsa_port *dp = dsa_slave_to_port(dev); 870 struct dsa_switch *ds = dp->ds; 871 int ret; 872 873 /* Port's PHY and MAC both need to be EEE capable */ 874 if (!dev->phydev || !dp->pl) 875 return -ENODEV; 876 877 if (!ds->ops->get_mac_eee) 878 return -EOPNOTSUPP; 879 880 ret = ds->ops->get_mac_eee(ds, dp->index, e); 881 if (ret) 882 return ret; 883 884 return phylink_ethtool_get_eee(dp->pl, e); 885 } 886 887 static int dsa_slave_get_link_ksettings(struct net_device *dev, 888 struct ethtool_link_ksettings *cmd) 889 { 890 struct dsa_port *dp = dsa_slave_to_port(dev); 891 892 return phylink_ethtool_ksettings_get(dp->pl, cmd); 893 } 894 895 static int dsa_slave_set_link_ksettings(struct net_device *dev, 896 const struct ethtool_link_ksettings *cmd) 897 { 898 struct dsa_port *dp = dsa_slave_to_port(dev); 899 900 return phylink_ethtool_ksettings_set(dp->pl, cmd); 901 } 902 903 static void dsa_slave_get_pauseparam(struct net_device *dev, 904 struct ethtool_pauseparam *pause) 905 { 906 struct dsa_port *dp = dsa_slave_to_port(dev); 907 908 phylink_ethtool_get_pauseparam(dp->pl, pause); 909 } 910 911 static int dsa_slave_set_pauseparam(struct net_device *dev, 912 struct ethtool_pauseparam *pause) 913 { 914 struct dsa_port *dp = dsa_slave_to_port(dev); 915 916 return phylink_ethtool_set_pauseparam(dp->pl, pause); 917 } 918 919 #ifdef CONFIG_NET_POLL_CONTROLLER 920 static int dsa_slave_netpoll_setup(struct net_device *dev, 921 struct netpoll_info *ni) 922 { 923 struct net_device *master = dsa_slave_to_master(dev); 924 struct dsa_slave_priv *p = netdev_priv(dev); 925 struct netpoll *netpoll; 926 int err = 0; 927 928 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 929 if (!netpoll) 930 return -ENOMEM; 931 932 err = __netpoll_setup(netpoll, master); 933 if (err) { 934 kfree(netpoll); 935 goto out; 936 } 937 938 p->netpoll = netpoll; 939 out: 940 return err; 941 } 942 943 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 944 { 945 struct dsa_slave_priv *p = netdev_priv(dev); 946 struct netpoll *netpoll = p->netpoll; 947 948 if (!netpoll) 949 return; 950 951 p->netpoll = NULL; 952 953 __netpoll_free(netpoll); 954 } 955 956 static void dsa_slave_poll_controller(struct net_device *dev) 957 { 958 } 959 #endif 960 961 static int dsa_slave_get_phys_port_name(struct net_device *dev, 962 char *name, size_t len) 963 { 964 struct dsa_port *dp = dsa_slave_to_port(dev); 965 966 /* For non-legacy ports, devlink is used and it takes 967 * care of the name generation. This ndo implementation 968 * should be removed with legacy support. 969 */ 970 if (dp->ds->devlink) 971 return -EOPNOTSUPP; 972 973 if (snprintf(name, len, "p%d", dp->index) >= len) 974 return -EINVAL; 975 976 return 0; 977 } 978 979 static struct dsa_mall_tc_entry * 980 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie) 981 { 982 struct dsa_slave_priv *p = netdev_priv(dev); 983 struct dsa_mall_tc_entry *mall_tc_entry; 984 985 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 986 if (mall_tc_entry->cookie == cookie) 987 return mall_tc_entry; 988 989 return NULL; 990 } 991 992 static int 993 dsa_slave_add_cls_matchall_mirred(struct net_device *dev, 994 struct tc_cls_matchall_offload *cls, 995 bool ingress) 996 { 997 struct dsa_port *dp = dsa_slave_to_port(dev); 998 struct dsa_slave_priv *p = netdev_priv(dev); 999 struct dsa_mall_mirror_tc_entry *mirror; 1000 struct dsa_mall_tc_entry *mall_tc_entry; 1001 struct dsa_switch *ds = dp->ds; 1002 struct flow_action_entry *act; 1003 struct dsa_port *to_dp; 1004 int err; 1005 1006 if (!ds->ops->port_mirror_add) 1007 return -EOPNOTSUPP; 1008 1009 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1010 cls->common.extack)) 1011 return -EOPNOTSUPP; 1012 1013 act = &cls->rule->action.entries[0]; 1014 1015 if (!act->dev) 1016 return -EINVAL; 1017 1018 if (!dsa_slave_dev_check(act->dev)) 1019 return -EOPNOTSUPP; 1020 1021 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1022 if (!mall_tc_entry) 1023 return -ENOMEM; 1024 1025 mall_tc_entry->cookie = cls->cookie; 1026 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1027 mirror = &mall_tc_entry->mirror; 1028 1029 to_dp = dsa_slave_to_port(act->dev); 1030 1031 mirror->to_local_port = to_dp->index; 1032 mirror->ingress = ingress; 1033 1034 err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress); 1035 if (err) { 1036 kfree(mall_tc_entry); 1037 return err; 1038 } 1039 1040 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1041 1042 return err; 1043 } 1044 1045 static int 1046 dsa_slave_add_cls_matchall_police(struct net_device *dev, 1047 struct tc_cls_matchall_offload *cls, 1048 bool ingress) 1049 { 1050 struct netlink_ext_ack *extack = cls->common.extack; 1051 struct dsa_port *dp = dsa_slave_to_port(dev); 1052 struct dsa_slave_priv *p = netdev_priv(dev); 1053 struct dsa_mall_policer_tc_entry *policer; 1054 struct dsa_mall_tc_entry *mall_tc_entry; 1055 struct dsa_switch *ds = dp->ds; 1056 struct flow_action_entry *act; 1057 int err; 1058 1059 if (!ds->ops->port_policer_add) { 1060 NL_SET_ERR_MSG_MOD(extack, 1061 "Policing offload not implemented"); 1062 return -EOPNOTSUPP; 1063 } 1064 1065 if (!ingress) { 1066 NL_SET_ERR_MSG_MOD(extack, 1067 "Only supported on ingress qdisc"); 1068 return -EOPNOTSUPP; 1069 } 1070 1071 if (!flow_action_basic_hw_stats_check(&cls->rule->action, 1072 cls->common.extack)) 1073 return -EOPNOTSUPP; 1074 1075 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) { 1076 if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) { 1077 NL_SET_ERR_MSG_MOD(extack, 1078 "Only one port policer allowed"); 1079 return -EEXIST; 1080 } 1081 } 1082 1083 act = &cls->rule->action.entries[0]; 1084 1085 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1086 if (!mall_tc_entry) 1087 return -ENOMEM; 1088 1089 mall_tc_entry->cookie = cls->cookie; 1090 mall_tc_entry->type = DSA_PORT_MALL_POLICER; 1091 policer = &mall_tc_entry->policer; 1092 policer->rate_bytes_per_sec = act->police.rate_bytes_ps; 1093 policer->burst = act->police.burst; 1094 1095 err = ds->ops->port_policer_add(ds, dp->index, policer); 1096 if (err) { 1097 kfree(mall_tc_entry); 1098 return err; 1099 } 1100 1101 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1102 1103 return err; 1104 } 1105 1106 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1107 struct tc_cls_matchall_offload *cls, 1108 bool ingress) 1109 { 1110 int err = -EOPNOTSUPP; 1111 1112 if (cls->common.protocol == htons(ETH_P_ALL) && 1113 flow_offload_has_one_action(&cls->rule->action) && 1114 cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED) 1115 err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress); 1116 else if (flow_offload_has_one_action(&cls->rule->action) && 1117 cls->rule->action.entries[0].id == FLOW_ACTION_POLICE) 1118 err = dsa_slave_add_cls_matchall_police(dev, cls, ingress); 1119 1120 return err; 1121 } 1122 1123 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1124 struct tc_cls_matchall_offload *cls) 1125 { 1126 struct dsa_port *dp = dsa_slave_to_port(dev); 1127 struct dsa_mall_tc_entry *mall_tc_entry; 1128 struct dsa_switch *ds = dp->ds; 1129 1130 mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie); 1131 if (!mall_tc_entry) 1132 return; 1133 1134 list_del(&mall_tc_entry->list); 1135 1136 switch (mall_tc_entry->type) { 1137 case DSA_PORT_MALL_MIRROR: 1138 if (ds->ops->port_mirror_del) 1139 ds->ops->port_mirror_del(ds, dp->index, 1140 &mall_tc_entry->mirror); 1141 break; 1142 case DSA_PORT_MALL_POLICER: 1143 if (ds->ops->port_policer_del) 1144 ds->ops->port_policer_del(ds, dp->index); 1145 break; 1146 default: 1147 WARN_ON(1); 1148 } 1149 1150 kfree(mall_tc_entry); 1151 } 1152 1153 static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev, 1154 struct tc_cls_matchall_offload *cls, 1155 bool ingress) 1156 { 1157 if (cls->common.chain_index) 1158 return -EOPNOTSUPP; 1159 1160 switch (cls->command) { 1161 case TC_CLSMATCHALL_REPLACE: 1162 return dsa_slave_add_cls_matchall(dev, cls, ingress); 1163 case TC_CLSMATCHALL_DESTROY: 1164 dsa_slave_del_cls_matchall(dev, cls); 1165 return 0; 1166 default: 1167 return -EOPNOTSUPP; 1168 } 1169 } 1170 1171 static int dsa_slave_add_cls_flower(struct net_device *dev, 1172 struct flow_cls_offload *cls, 1173 bool ingress) 1174 { 1175 struct dsa_port *dp = dsa_slave_to_port(dev); 1176 struct dsa_switch *ds = dp->ds; 1177 int port = dp->index; 1178 1179 if (!ds->ops->cls_flower_add) 1180 return -EOPNOTSUPP; 1181 1182 return ds->ops->cls_flower_add(ds, port, cls, ingress); 1183 } 1184 1185 static int dsa_slave_del_cls_flower(struct net_device *dev, 1186 struct flow_cls_offload *cls, 1187 bool ingress) 1188 { 1189 struct dsa_port *dp = dsa_slave_to_port(dev); 1190 struct dsa_switch *ds = dp->ds; 1191 int port = dp->index; 1192 1193 if (!ds->ops->cls_flower_del) 1194 return -EOPNOTSUPP; 1195 1196 return ds->ops->cls_flower_del(ds, port, cls, ingress); 1197 } 1198 1199 static int dsa_slave_stats_cls_flower(struct net_device *dev, 1200 struct flow_cls_offload *cls, 1201 bool ingress) 1202 { 1203 struct dsa_port *dp = dsa_slave_to_port(dev); 1204 struct dsa_switch *ds = dp->ds; 1205 int port = dp->index; 1206 1207 if (!ds->ops->cls_flower_stats) 1208 return -EOPNOTSUPP; 1209 1210 return ds->ops->cls_flower_stats(ds, port, cls, ingress); 1211 } 1212 1213 static int dsa_slave_setup_tc_cls_flower(struct net_device *dev, 1214 struct flow_cls_offload *cls, 1215 bool ingress) 1216 { 1217 switch (cls->command) { 1218 case FLOW_CLS_REPLACE: 1219 return dsa_slave_add_cls_flower(dev, cls, ingress); 1220 case FLOW_CLS_DESTROY: 1221 return dsa_slave_del_cls_flower(dev, cls, ingress); 1222 case FLOW_CLS_STATS: 1223 return dsa_slave_stats_cls_flower(dev, cls, ingress); 1224 default: 1225 return -EOPNOTSUPP; 1226 } 1227 } 1228 1229 static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 1230 void *cb_priv, bool ingress) 1231 { 1232 struct net_device *dev = cb_priv; 1233 1234 if (!tc_can_offload(dev)) 1235 return -EOPNOTSUPP; 1236 1237 switch (type) { 1238 case TC_SETUP_CLSMATCHALL: 1239 return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress); 1240 case TC_SETUP_CLSFLOWER: 1241 return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress); 1242 default: 1243 return -EOPNOTSUPP; 1244 } 1245 } 1246 1247 static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type, 1248 void *type_data, void *cb_priv) 1249 { 1250 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true); 1251 } 1252 1253 static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type, 1254 void *type_data, void *cb_priv) 1255 { 1256 return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false); 1257 } 1258 1259 static LIST_HEAD(dsa_slave_block_cb_list); 1260 1261 static int dsa_slave_setup_tc_block(struct net_device *dev, 1262 struct flow_block_offload *f) 1263 { 1264 struct flow_block_cb *block_cb; 1265 flow_setup_cb_t *cb; 1266 1267 if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 1268 cb = dsa_slave_setup_tc_block_cb_ig; 1269 else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) 1270 cb = dsa_slave_setup_tc_block_cb_eg; 1271 else 1272 return -EOPNOTSUPP; 1273 1274 f->driver_block_list = &dsa_slave_block_cb_list; 1275 1276 switch (f->command) { 1277 case FLOW_BLOCK_BIND: 1278 if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list)) 1279 return -EBUSY; 1280 1281 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 1282 if (IS_ERR(block_cb)) 1283 return PTR_ERR(block_cb); 1284 1285 flow_block_cb_add(block_cb, f); 1286 list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list); 1287 return 0; 1288 case FLOW_BLOCK_UNBIND: 1289 block_cb = flow_block_cb_lookup(f->block, cb, dev); 1290 if (!block_cb) 1291 return -ENOENT; 1292 1293 flow_block_cb_remove(block_cb, f); 1294 list_del(&block_cb->driver_list); 1295 return 0; 1296 default: 1297 return -EOPNOTSUPP; 1298 } 1299 } 1300 1301 static int dsa_slave_setup_ft_block(struct dsa_switch *ds, int port, 1302 void *type_data) 1303 { 1304 struct dsa_port *cpu_dp = dsa_to_port(ds, port)->cpu_dp; 1305 struct net_device *master = cpu_dp->master; 1306 1307 if (!master->netdev_ops->ndo_setup_tc) 1308 return -EOPNOTSUPP; 1309 1310 return master->netdev_ops->ndo_setup_tc(master, TC_SETUP_FT, type_data); 1311 } 1312 1313 static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type, 1314 void *type_data) 1315 { 1316 struct dsa_port *dp = dsa_slave_to_port(dev); 1317 struct dsa_switch *ds = dp->ds; 1318 1319 switch (type) { 1320 case TC_SETUP_BLOCK: 1321 return dsa_slave_setup_tc_block(dev, type_data); 1322 case TC_SETUP_FT: 1323 return dsa_slave_setup_ft_block(ds, dp->index, type_data); 1324 default: 1325 break; 1326 } 1327 1328 if (!ds->ops->port_setup_tc) 1329 return -EOPNOTSUPP; 1330 1331 return ds->ops->port_setup_tc(ds, dp->index, type, type_data); 1332 } 1333 1334 static int dsa_slave_get_rxnfc(struct net_device *dev, 1335 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1336 { 1337 struct dsa_port *dp = dsa_slave_to_port(dev); 1338 struct dsa_switch *ds = dp->ds; 1339 1340 if (!ds->ops->get_rxnfc) 1341 return -EOPNOTSUPP; 1342 1343 return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs); 1344 } 1345 1346 static int dsa_slave_set_rxnfc(struct net_device *dev, 1347 struct ethtool_rxnfc *nfc) 1348 { 1349 struct dsa_port *dp = dsa_slave_to_port(dev); 1350 struct dsa_switch *ds = dp->ds; 1351 1352 if (!ds->ops->set_rxnfc) 1353 return -EOPNOTSUPP; 1354 1355 return ds->ops->set_rxnfc(ds, dp->index, nfc); 1356 } 1357 1358 static int dsa_slave_get_ts_info(struct net_device *dev, 1359 struct ethtool_ts_info *ts) 1360 { 1361 struct dsa_slave_priv *p = netdev_priv(dev); 1362 struct dsa_switch *ds = p->dp->ds; 1363 1364 if (!ds->ops->get_ts_info) 1365 return -EOPNOTSUPP; 1366 1367 return ds->ops->get_ts_info(ds, p->dp->index, ts); 1368 } 1369 1370 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 1371 u16 vid) 1372 { 1373 struct net_device *master = dsa_slave_to_master(dev); 1374 struct dsa_port *dp = dsa_slave_to_port(dev); 1375 struct switchdev_obj_port_vlan vlan = { 1376 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1377 .vid = vid, 1378 /* This API only allows programming tagged, non-PVID VIDs */ 1379 .flags = 0, 1380 }; 1381 struct netlink_ext_ack extack = {0}; 1382 int ret; 1383 1384 /* User port... */ 1385 ret = dsa_port_vlan_add(dp, &vlan, &extack); 1386 if (ret) { 1387 if (extack._msg) 1388 netdev_err(dev, "%s\n", extack._msg); 1389 return ret; 1390 } 1391 1392 /* And CPU port... */ 1393 ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack); 1394 if (ret) { 1395 if (extack._msg) 1396 netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, 1397 extack._msg); 1398 return ret; 1399 } 1400 1401 return vlan_vid_add(master, proto, vid); 1402 } 1403 1404 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, 1405 u16 vid) 1406 { 1407 struct net_device *master = dsa_slave_to_master(dev); 1408 struct dsa_port *dp = dsa_slave_to_port(dev); 1409 struct switchdev_obj_port_vlan vlan = { 1410 .vid = vid, 1411 /* This API only allows programming tagged, non-PVID VIDs */ 1412 .flags = 0, 1413 }; 1414 int err; 1415 1416 /* Do not deprogram the CPU port as it may be shared with other user 1417 * ports which can be members of this VLAN as well. 1418 */ 1419 err = dsa_port_vlan_del(dp, &vlan); 1420 if (err) 1421 return err; 1422 1423 vlan_vid_del(master, proto, vid); 1424 1425 return 0; 1426 } 1427 1428 struct dsa_hw_port { 1429 struct list_head list; 1430 struct net_device *dev; 1431 int old_mtu; 1432 }; 1433 1434 static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu) 1435 { 1436 const struct dsa_hw_port *p; 1437 int err; 1438 1439 list_for_each_entry(p, hw_port_list, list) { 1440 if (p->dev->mtu == mtu) 1441 continue; 1442 1443 err = dev_set_mtu(p->dev, mtu); 1444 if (err) 1445 goto rollback; 1446 } 1447 1448 return 0; 1449 1450 rollback: 1451 list_for_each_entry_continue_reverse(p, hw_port_list, list) { 1452 if (p->dev->mtu == p->old_mtu) 1453 continue; 1454 1455 if (dev_set_mtu(p->dev, p->old_mtu)) 1456 netdev_err(p->dev, "Failed to restore MTU\n"); 1457 } 1458 1459 return err; 1460 } 1461 1462 static void dsa_hw_port_list_free(struct list_head *hw_port_list) 1463 { 1464 struct dsa_hw_port *p, *n; 1465 1466 list_for_each_entry_safe(p, n, hw_port_list, list) 1467 kfree(p); 1468 } 1469 1470 /* Make the hardware datapath to/from @dev limited to a common MTU */ 1471 static void dsa_bridge_mtu_normalization(struct dsa_port *dp) 1472 { 1473 struct list_head hw_port_list; 1474 struct dsa_switch_tree *dst; 1475 int min_mtu = ETH_MAX_MTU; 1476 struct dsa_port *other_dp; 1477 int err; 1478 1479 if (!dp->ds->mtu_enforcement_ingress) 1480 return; 1481 1482 if (!dp->bridge_dev) 1483 return; 1484 1485 INIT_LIST_HEAD(&hw_port_list); 1486 1487 /* Populate the list of ports that are part of the same bridge 1488 * as the newly added/modified port 1489 */ 1490 list_for_each_entry(dst, &dsa_tree_list, list) { 1491 list_for_each_entry(other_dp, &dst->ports, list) { 1492 struct dsa_hw_port *hw_port; 1493 struct net_device *slave; 1494 1495 if (other_dp->type != DSA_PORT_TYPE_USER) 1496 continue; 1497 1498 if (other_dp->bridge_dev != dp->bridge_dev) 1499 continue; 1500 1501 if (!other_dp->ds->mtu_enforcement_ingress) 1502 continue; 1503 1504 slave = other_dp->slave; 1505 1506 if (min_mtu > slave->mtu) 1507 min_mtu = slave->mtu; 1508 1509 hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL); 1510 if (!hw_port) 1511 goto out; 1512 1513 hw_port->dev = slave; 1514 hw_port->old_mtu = slave->mtu; 1515 1516 list_add(&hw_port->list, &hw_port_list); 1517 } 1518 } 1519 1520 /* Attempt to configure the entire hardware bridge to the newly added 1521 * interface's MTU first, regardless of whether the intention of the 1522 * user was to raise or lower it. 1523 */ 1524 err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu); 1525 if (!err) 1526 goto out; 1527 1528 /* Clearly that didn't work out so well, so just set the minimum MTU on 1529 * all hardware bridge ports now. If this fails too, then all ports will 1530 * still have their old MTU rolled back anyway. 1531 */ 1532 dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu); 1533 1534 out: 1535 dsa_hw_port_list_free(&hw_port_list); 1536 } 1537 1538 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu) 1539 { 1540 struct net_device *master = dsa_slave_to_master(dev); 1541 struct dsa_port *dp = dsa_slave_to_port(dev); 1542 struct dsa_slave_priv *p = netdev_priv(dev); 1543 struct dsa_switch *ds = p->dp->ds; 1544 struct dsa_port *cpu_dp; 1545 int port = p->dp->index; 1546 int largest_mtu = 0; 1547 int new_master_mtu; 1548 int old_master_mtu; 1549 int mtu_limit; 1550 int cpu_mtu; 1551 int err, i; 1552 1553 if (!ds->ops->port_change_mtu) 1554 return -EOPNOTSUPP; 1555 1556 for (i = 0; i < ds->num_ports; i++) { 1557 int slave_mtu; 1558 1559 if (!dsa_is_user_port(ds, i)) 1560 continue; 1561 1562 /* During probe, this function will be called for each slave 1563 * device, while not all of them have been allocated. That's 1564 * ok, it doesn't change what the maximum is, so ignore it. 1565 */ 1566 if (!dsa_to_port(ds, i)->slave) 1567 continue; 1568 1569 /* Pretend that we already applied the setting, which we 1570 * actually haven't (still haven't done all integrity checks) 1571 */ 1572 if (i == port) 1573 slave_mtu = new_mtu; 1574 else 1575 slave_mtu = dsa_to_port(ds, i)->slave->mtu; 1576 1577 if (largest_mtu < slave_mtu) 1578 largest_mtu = slave_mtu; 1579 } 1580 1581 cpu_dp = dsa_to_port(ds, port)->cpu_dp; 1582 1583 mtu_limit = min_t(int, master->max_mtu, dev->max_mtu); 1584 old_master_mtu = master->mtu; 1585 new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead; 1586 if (new_master_mtu > mtu_limit) 1587 return -ERANGE; 1588 1589 /* If the master MTU isn't over limit, there's no need to check the CPU 1590 * MTU, since that surely isn't either. 1591 */ 1592 cpu_mtu = largest_mtu; 1593 1594 /* Start applying stuff */ 1595 if (new_master_mtu != old_master_mtu) { 1596 err = dev_set_mtu(master, new_master_mtu); 1597 if (err < 0) 1598 goto out_master_failed; 1599 1600 /* We only need to propagate the MTU of the CPU port to 1601 * upstream switches. 1602 */ 1603 err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true); 1604 if (err) 1605 goto out_cpu_failed; 1606 } 1607 1608 err = dsa_port_mtu_change(dp, new_mtu, false); 1609 if (err) 1610 goto out_port_failed; 1611 1612 dev->mtu = new_mtu; 1613 1614 dsa_bridge_mtu_normalization(dp); 1615 1616 return 0; 1617 1618 out_port_failed: 1619 if (new_master_mtu != old_master_mtu) 1620 dsa_port_mtu_change(cpu_dp, old_master_mtu - 1621 cpu_dp->tag_ops->overhead, 1622 true); 1623 out_cpu_failed: 1624 if (new_master_mtu != old_master_mtu) 1625 dev_set_mtu(master, old_master_mtu); 1626 out_master_failed: 1627 return err; 1628 } 1629 1630 static const struct ethtool_ops dsa_slave_ethtool_ops = { 1631 .get_drvinfo = dsa_slave_get_drvinfo, 1632 .get_regs_len = dsa_slave_get_regs_len, 1633 .get_regs = dsa_slave_get_regs, 1634 .nway_reset = dsa_slave_nway_reset, 1635 .get_link = ethtool_op_get_link, 1636 .get_eeprom_len = dsa_slave_get_eeprom_len, 1637 .get_eeprom = dsa_slave_get_eeprom, 1638 .set_eeprom = dsa_slave_set_eeprom, 1639 .get_strings = dsa_slave_get_strings, 1640 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 1641 .get_sset_count = dsa_slave_get_sset_count, 1642 .set_wol = dsa_slave_set_wol, 1643 .get_wol = dsa_slave_get_wol, 1644 .set_eee = dsa_slave_set_eee, 1645 .get_eee = dsa_slave_get_eee, 1646 .get_link_ksettings = dsa_slave_get_link_ksettings, 1647 .set_link_ksettings = dsa_slave_set_link_ksettings, 1648 .get_pauseparam = dsa_slave_get_pauseparam, 1649 .set_pauseparam = dsa_slave_set_pauseparam, 1650 .get_rxnfc = dsa_slave_get_rxnfc, 1651 .set_rxnfc = dsa_slave_set_rxnfc, 1652 .get_ts_info = dsa_slave_get_ts_info, 1653 .self_test = dsa_slave_net_selftest, 1654 }; 1655 1656 /* legacy way, bypassing the bridge *****************************************/ 1657 static int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 1658 struct net_device *dev, 1659 const unsigned char *addr, u16 vid, 1660 u16 flags, 1661 struct netlink_ext_ack *extack) 1662 { 1663 struct dsa_port *dp = dsa_slave_to_port(dev); 1664 1665 return dsa_port_fdb_add(dp, addr, vid); 1666 } 1667 1668 static int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 1669 struct net_device *dev, 1670 const unsigned char *addr, u16 vid) 1671 { 1672 struct dsa_port *dp = dsa_slave_to_port(dev); 1673 1674 return dsa_port_fdb_del(dp, addr, vid); 1675 } 1676 1677 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev) 1678 { 1679 struct dsa_port *dp = dsa_slave_to_port(dev); 1680 1681 return dp->ds->devlink ? &dp->devlink_port : NULL; 1682 } 1683 1684 static void dsa_slave_get_stats64(struct net_device *dev, 1685 struct rtnl_link_stats64 *s) 1686 { 1687 struct dsa_port *dp = dsa_slave_to_port(dev); 1688 struct dsa_switch *ds = dp->ds; 1689 1690 if (ds->ops->get_stats64) 1691 ds->ops->get_stats64(ds, dp->index, s); 1692 else 1693 dev_get_tstats64(dev, s); 1694 } 1695 1696 static int dsa_slave_fill_forward_path(struct net_device_path_ctx *ctx, 1697 struct net_device_path *path) 1698 { 1699 struct dsa_port *dp = dsa_slave_to_port(ctx->dev); 1700 struct dsa_port *cpu_dp = dp->cpu_dp; 1701 1702 path->dev = ctx->dev; 1703 path->type = DEV_PATH_DSA; 1704 path->dsa.proto = cpu_dp->tag_ops->proto; 1705 path->dsa.port = dp->index; 1706 ctx->dev = cpu_dp->master; 1707 1708 return 0; 1709 } 1710 1711 static const struct net_device_ops dsa_slave_netdev_ops = { 1712 .ndo_open = dsa_slave_open, 1713 .ndo_stop = dsa_slave_close, 1714 .ndo_start_xmit = dsa_slave_xmit, 1715 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 1716 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 1717 .ndo_set_mac_address = dsa_slave_set_mac_address, 1718 .ndo_fdb_add = dsa_legacy_fdb_add, 1719 .ndo_fdb_del = dsa_legacy_fdb_del, 1720 .ndo_fdb_dump = dsa_slave_fdb_dump, 1721 .ndo_do_ioctl = dsa_slave_ioctl, 1722 .ndo_get_iflink = dsa_slave_get_iflink, 1723 #ifdef CONFIG_NET_POLL_CONTROLLER 1724 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 1725 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 1726 .ndo_poll_controller = dsa_slave_poll_controller, 1727 #endif 1728 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 1729 .ndo_setup_tc = dsa_slave_setup_tc, 1730 .ndo_get_stats64 = dsa_slave_get_stats64, 1731 .ndo_get_port_parent_id = dsa_slave_get_port_parent_id, 1732 .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid, 1733 .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid, 1734 .ndo_get_devlink_port = dsa_slave_get_devlink_port, 1735 .ndo_change_mtu = dsa_slave_change_mtu, 1736 .ndo_fill_forward_path = dsa_slave_fill_forward_path, 1737 }; 1738 1739 static struct device_type dsa_type = { 1740 .name = "dsa", 1741 }; 1742 1743 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up) 1744 { 1745 const struct dsa_port *dp = dsa_to_port(ds, port); 1746 1747 if (dp->pl) 1748 phylink_mac_change(dp->pl, up); 1749 } 1750 EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change); 1751 1752 static void dsa_slave_phylink_fixed_state(struct phylink_config *config, 1753 struct phylink_link_state *state) 1754 { 1755 struct dsa_port *dp = container_of(config, struct dsa_port, pl_config); 1756 struct dsa_switch *ds = dp->ds; 1757 1758 /* No need to check that this operation is valid, the callback would 1759 * not be called if it was not. 1760 */ 1761 ds->ops->phylink_fixed_state(ds, dp->index, state); 1762 } 1763 1764 /* slave device setup *******************************************************/ 1765 static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr) 1766 { 1767 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1768 struct dsa_switch *ds = dp->ds; 1769 1770 slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr); 1771 if (!slave_dev->phydev) { 1772 netdev_err(slave_dev, "no phy at %d\n", addr); 1773 return -ENODEV; 1774 } 1775 1776 return phylink_connect_phy(dp->pl, slave_dev->phydev); 1777 } 1778 1779 static int dsa_slave_phy_setup(struct net_device *slave_dev) 1780 { 1781 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1782 struct device_node *port_dn = dp->dn; 1783 struct dsa_switch *ds = dp->ds; 1784 phy_interface_t mode; 1785 u32 phy_flags = 0; 1786 int ret; 1787 1788 ret = of_get_phy_mode(port_dn, &mode); 1789 if (ret) 1790 mode = PHY_INTERFACE_MODE_NA; 1791 1792 dp->pl_config.dev = &slave_dev->dev; 1793 dp->pl_config.type = PHYLINK_NETDEV; 1794 1795 /* The get_fixed_state callback takes precedence over polling the 1796 * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set 1797 * this if the switch provides such a callback. 1798 */ 1799 if (ds->ops->phylink_fixed_state) { 1800 dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state; 1801 dp->pl_config.poll_fixed_state = true; 1802 } 1803 1804 dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode, 1805 &dsa_port_phylink_mac_ops); 1806 if (IS_ERR(dp->pl)) { 1807 netdev_err(slave_dev, 1808 "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl)); 1809 return PTR_ERR(dp->pl); 1810 } 1811 1812 if (ds->ops->get_phy_flags) 1813 phy_flags = ds->ops->get_phy_flags(ds, dp->index); 1814 1815 ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags); 1816 if (ret == -ENODEV && ds->slave_mii_bus) { 1817 /* We could not connect to a designated PHY or SFP, so try to 1818 * use the switch internal MDIO bus instead 1819 */ 1820 ret = dsa_slave_phy_connect(slave_dev, dp->index); 1821 if (ret) { 1822 netdev_err(slave_dev, 1823 "failed to connect to port %d: %d\n", 1824 dp->index, ret); 1825 phylink_destroy(dp->pl); 1826 return ret; 1827 } 1828 } 1829 1830 return ret; 1831 } 1832 1833 void dsa_slave_setup_tagger(struct net_device *slave) 1834 { 1835 struct dsa_port *dp = dsa_slave_to_port(slave); 1836 struct dsa_slave_priv *p = netdev_priv(slave); 1837 const struct dsa_port *cpu_dp = dp->cpu_dp; 1838 struct net_device *master = cpu_dp->master; 1839 1840 if (cpu_dp->tag_ops->tail_tag) 1841 slave->needed_tailroom = cpu_dp->tag_ops->overhead; 1842 else 1843 slave->needed_headroom = cpu_dp->tag_ops->overhead; 1844 /* Try to save one extra realloc later in the TX path (in the master) 1845 * by also inheriting the master's needed headroom and tailroom. 1846 * The 8021q driver also does this. 1847 */ 1848 slave->needed_headroom += master->needed_headroom; 1849 slave->needed_tailroom += master->needed_tailroom; 1850 1851 p->xmit = cpu_dp->tag_ops->xmit; 1852 } 1853 1854 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1855 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1856 struct netdev_queue *txq, 1857 void *_unused) 1858 { 1859 lockdep_set_class(&txq->_xmit_lock, 1860 &dsa_slave_netdev_xmit_lock_key); 1861 } 1862 1863 int dsa_slave_suspend(struct net_device *slave_dev) 1864 { 1865 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1866 1867 if (!netif_running(slave_dev)) 1868 return 0; 1869 1870 netif_device_detach(slave_dev); 1871 1872 rtnl_lock(); 1873 phylink_stop(dp->pl); 1874 rtnl_unlock(); 1875 1876 return 0; 1877 } 1878 1879 int dsa_slave_resume(struct net_device *slave_dev) 1880 { 1881 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 1882 1883 if (!netif_running(slave_dev)) 1884 return 0; 1885 1886 netif_device_attach(slave_dev); 1887 1888 rtnl_lock(); 1889 phylink_start(dp->pl); 1890 rtnl_unlock(); 1891 1892 return 0; 1893 } 1894 1895 int dsa_slave_create(struct dsa_port *port) 1896 { 1897 const struct dsa_port *cpu_dp = port->cpu_dp; 1898 struct net_device *master = cpu_dp->master; 1899 struct dsa_switch *ds = port->ds; 1900 const char *name = port->name; 1901 struct net_device *slave_dev; 1902 struct dsa_slave_priv *p; 1903 int ret; 1904 1905 if (!ds->num_tx_queues) 1906 ds->num_tx_queues = 1; 1907 1908 slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name, 1909 NET_NAME_UNKNOWN, ether_setup, 1910 ds->num_tx_queues, 1); 1911 if (slave_dev == NULL) 1912 return -ENOMEM; 1913 1914 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1915 if (ds->ops->port_vlan_add && ds->ops->port_vlan_del) 1916 slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 1917 slave_dev->hw_features |= NETIF_F_HW_TC; 1918 slave_dev->features |= NETIF_F_LLTX; 1919 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1920 if (!is_zero_ether_addr(port->mac)) 1921 ether_addr_copy(slave_dev->dev_addr, port->mac); 1922 else 1923 eth_hw_addr_inherit(slave_dev, master); 1924 slave_dev->priv_flags |= IFF_NO_QUEUE; 1925 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1926 if (ds->ops->port_max_mtu) 1927 slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index); 1928 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1929 1930 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1931 NULL); 1932 1933 SET_NETDEV_DEV(slave_dev, port->ds->dev); 1934 slave_dev->dev.of_node = port->dn; 1935 slave_dev->vlan_features = master->vlan_features; 1936 1937 p = netdev_priv(slave_dev); 1938 slave_dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 1939 if (!slave_dev->tstats) { 1940 free_netdev(slave_dev); 1941 return -ENOMEM; 1942 } 1943 1944 ret = gro_cells_init(&p->gcells, slave_dev); 1945 if (ret) 1946 goto out_free; 1947 1948 p->dp = port; 1949 INIT_LIST_HEAD(&p->mall_tc_list); 1950 port->slave = slave_dev; 1951 dsa_slave_setup_tagger(slave_dev); 1952 1953 rtnl_lock(); 1954 ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN); 1955 rtnl_unlock(); 1956 if (ret && ret != -EOPNOTSUPP) 1957 dev_warn(ds->dev, "nonfatal error %d setting MTU to %d on port %d\n", 1958 ret, ETH_DATA_LEN, port->index); 1959 1960 netif_carrier_off(slave_dev); 1961 1962 ret = dsa_slave_phy_setup(slave_dev); 1963 if (ret) { 1964 netdev_err(slave_dev, 1965 "error %d setting up PHY for tree %d, switch %d, port %d\n", 1966 ret, ds->dst->index, ds->index, port->index); 1967 goto out_gcells; 1968 } 1969 1970 rtnl_lock(); 1971 1972 ret = register_netdevice(slave_dev); 1973 if (ret) { 1974 netdev_err(master, "error %d registering interface %s\n", 1975 ret, slave_dev->name); 1976 rtnl_unlock(); 1977 goto out_phy; 1978 } 1979 1980 ret = netdev_upper_dev_link(master, slave_dev, NULL); 1981 1982 rtnl_unlock(); 1983 1984 if (ret) 1985 goto out_unregister; 1986 1987 return 0; 1988 1989 out_unregister: 1990 unregister_netdev(slave_dev); 1991 out_phy: 1992 rtnl_lock(); 1993 phylink_disconnect_phy(p->dp->pl); 1994 rtnl_unlock(); 1995 phylink_destroy(p->dp->pl); 1996 out_gcells: 1997 gro_cells_destroy(&p->gcells); 1998 out_free: 1999 free_percpu(slave_dev->tstats); 2000 free_netdev(slave_dev); 2001 port->slave = NULL; 2002 return ret; 2003 } 2004 2005 void dsa_slave_destroy(struct net_device *slave_dev) 2006 { 2007 struct net_device *master = dsa_slave_to_master(slave_dev); 2008 struct dsa_port *dp = dsa_slave_to_port(slave_dev); 2009 struct dsa_slave_priv *p = netdev_priv(slave_dev); 2010 2011 netif_carrier_off(slave_dev); 2012 rtnl_lock(); 2013 netdev_upper_dev_unlink(master, slave_dev); 2014 unregister_netdevice(slave_dev); 2015 phylink_disconnect_phy(dp->pl); 2016 rtnl_unlock(); 2017 2018 phylink_destroy(dp->pl); 2019 gro_cells_destroy(&p->gcells); 2020 free_percpu(slave_dev->tstats); 2021 free_netdev(slave_dev); 2022 } 2023 2024 bool dsa_slave_dev_check(const struct net_device *dev) 2025 { 2026 return dev->netdev_ops == &dsa_slave_netdev_ops; 2027 } 2028 EXPORT_SYMBOL_GPL(dsa_slave_dev_check); 2029 2030 static int dsa_slave_changeupper(struct net_device *dev, 2031 struct netdev_notifier_changeupper_info *info) 2032 { 2033 struct dsa_port *dp = dsa_slave_to_port(dev); 2034 struct netlink_ext_ack *extack; 2035 int err = NOTIFY_DONE; 2036 2037 extack = netdev_notifier_info_to_extack(&info->info); 2038 2039 if (netif_is_bridge_master(info->upper_dev)) { 2040 if (info->linking) { 2041 err = dsa_port_bridge_join(dp, info->upper_dev, extack); 2042 if (!err) 2043 dsa_bridge_mtu_normalization(dp); 2044 err = notifier_from_errno(err); 2045 } else { 2046 dsa_port_bridge_leave(dp, info->upper_dev); 2047 err = NOTIFY_OK; 2048 } 2049 } else if (netif_is_lag_master(info->upper_dev)) { 2050 if (info->linking) { 2051 err = dsa_port_lag_join(dp, info->upper_dev, 2052 info->upper_info, extack); 2053 if (err == -EOPNOTSUPP) { 2054 NL_SET_ERR_MSG_MOD(info->info.extack, 2055 "Offloading not supported"); 2056 err = 0; 2057 } 2058 err = notifier_from_errno(err); 2059 } else { 2060 dsa_port_lag_leave(dp, info->upper_dev); 2061 err = NOTIFY_OK; 2062 } 2063 } else if (is_hsr_master(info->upper_dev)) { 2064 if (info->linking) { 2065 err = dsa_port_hsr_join(dp, info->upper_dev); 2066 if (err == -EOPNOTSUPP) { 2067 NL_SET_ERR_MSG_MOD(info->info.extack, 2068 "Offloading not supported"); 2069 err = 0; 2070 } 2071 err = notifier_from_errno(err); 2072 } else { 2073 dsa_port_hsr_leave(dp, info->upper_dev); 2074 err = NOTIFY_OK; 2075 } 2076 } 2077 2078 return err; 2079 } 2080 2081 static int 2082 dsa_slave_lag_changeupper(struct net_device *dev, 2083 struct netdev_notifier_changeupper_info *info) 2084 { 2085 struct net_device *lower; 2086 struct list_head *iter; 2087 int err = NOTIFY_DONE; 2088 struct dsa_port *dp; 2089 2090 netdev_for_each_lower_dev(dev, lower, iter) { 2091 if (!dsa_slave_dev_check(lower)) 2092 continue; 2093 2094 dp = dsa_slave_to_port(lower); 2095 if (!dp->lag_dev) 2096 /* Software LAG */ 2097 continue; 2098 2099 err = dsa_slave_changeupper(lower, info); 2100 if (notifier_to_errno(err)) 2101 break; 2102 } 2103 2104 return err; 2105 } 2106 2107 static int 2108 dsa_prevent_bridging_8021q_upper(struct net_device *dev, 2109 struct netdev_notifier_changeupper_info *info) 2110 { 2111 struct netlink_ext_ack *ext_ack; 2112 struct net_device *slave; 2113 struct dsa_port *dp; 2114 2115 ext_ack = netdev_notifier_info_to_extack(&info->info); 2116 2117 if (!is_vlan_dev(dev)) 2118 return NOTIFY_DONE; 2119 2120 slave = vlan_dev_real_dev(dev); 2121 if (!dsa_slave_dev_check(slave)) 2122 return NOTIFY_DONE; 2123 2124 dp = dsa_slave_to_port(slave); 2125 if (!dp->bridge_dev) 2126 return NOTIFY_DONE; 2127 2128 /* Deny enslaving a VLAN device into a VLAN-aware bridge */ 2129 if (br_vlan_enabled(dp->bridge_dev) && 2130 netif_is_bridge_master(info->upper_dev) && info->linking) { 2131 NL_SET_ERR_MSG_MOD(ext_ack, 2132 "Cannot enslave VLAN device into VLAN aware bridge"); 2133 return notifier_from_errno(-EINVAL); 2134 } 2135 2136 return NOTIFY_DONE; 2137 } 2138 2139 static int 2140 dsa_slave_check_8021q_upper(struct net_device *dev, 2141 struct netdev_notifier_changeupper_info *info) 2142 { 2143 struct dsa_port *dp = dsa_slave_to_port(dev); 2144 struct net_device *br = dp->bridge_dev; 2145 struct bridge_vlan_info br_info; 2146 struct netlink_ext_ack *extack; 2147 int err = NOTIFY_DONE; 2148 u16 vid; 2149 2150 if (!br || !br_vlan_enabled(br)) 2151 return NOTIFY_DONE; 2152 2153 extack = netdev_notifier_info_to_extack(&info->info); 2154 vid = vlan_dev_vlan_id(info->upper_dev); 2155 2156 /* br_vlan_get_info() returns -EINVAL or -ENOENT if the 2157 * device, respectively the VID is not found, returning 2158 * 0 means success, which is a failure for us here. 2159 */ 2160 err = br_vlan_get_info(br, vid, &br_info); 2161 if (err == 0) { 2162 NL_SET_ERR_MSG_MOD(extack, 2163 "This VLAN is already configured by the bridge"); 2164 return notifier_from_errno(-EBUSY); 2165 } 2166 2167 return NOTIFY_DONE; 2168 } 2169 2170 static int dsa_slave_netdevice_event(struct notifier_block *nb, 2171 unsigned long event, void *ptr) 2172 { 2173 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2174 2175 switch (event) { 2176 case NETDEV_PRECHANGEUPPER: { 2177 struct netdev_notifier_changeupper_info *info = ptr; 2178 struct dsa_switch *ds; 2179 struct dsa_port *dp; 2180 int err; 2181 2182 if (!dsa_slave_dev_check(dev)) 2183 return dsa_prevent_bridging_8021q_upper(dev, ptr); 2184 2185 dp = dsa_slave_to_port(dev); 2186 ds = dp->ds; 2187 2188 if (ds->ops->port_prechangeupper) { 2189 err = ds->ops->port_prechangeupper(ds, dp->index, info); 2190 if (err) 2191 return notifier_from_errno(err); 2192 } 2193 2194 if (is_vlan_dev(info->upper_dev)) 2195 return dsa_slave_check_8021q_upper(dev, ptr); 2196 break; 2197 } 2198 case NETDEV_CHANGEUPPER: 2199 if (dsa_slave_dev_check(dev)) 2200 return dsa_slave_changeupper(dev, ptr); 2201 2202 if (netif_is_lag_master(dev)) 2203 return dsa_slave_lag_changeupper(dev, ptr); 2204 2205 break; 2206 case NETDEV_CHANGELOWERSTATE: { 2207 struct netdev_notifier_changelowerstate_info *info = ptr; 2208 struct dsa_port *dp; 2209 int err; 2210 2211 if (!dsa_slave_dev_check(dev)) 2212 break; 2213 2214 dp = dsa_slave_to_port(dev); 2215 2216 err = dsa_port_lag_change(dp, info->lower_state_info); 2217 return notifier_from_errno(err); 2218 } 2219 case NETDEV_GOING_DOWN: { 2220 struct dsa_port *dp, *cpu_dp; 2221 struct dsa_switch_tree *dst; 2222 LIST_HEAD(close_list); 2223 2224 if (!netdev_uses_dsa(dev)) 2225 return NOTIFY_DONE; 2226 2227 cpu_dp = dev->dsa_ptr; 2228 dst = cpu_dp->ds->dst; 2229 2230 list_for_each_entry(dp, &dst->ports, list) { 2231 if (!dsa_is_user_port(dp->ds, dp->index)) 2232 continue; 2233 2234 list_add(&dp->slave->close_list, &close_list); 2235 } 2236 2237 dev_close_many(&close_list, true); 2238 2239 return NOTIFY_OK; 2240 } 2241 default: 2242 break; 2243 } 2244 2245 return NOTIFY_DONE; 2246 } 2247 2248 static void 2249 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work) 2250 { 2251 struct dsa_switch *ds = switchdev_work->ds; 2252 struct switchdev_notifier_fdb_info info; 2253 struct dsa_port *dp; 2254 2255 if (!dsa_is_user_port(ds, switchdev_work->port)) 2256 return; 2257 2258 info.addr = switchdev_work->addr; 2259 info.vid = switchdev_work->vid; 2260 info.offloaded = true; 2261 dp = dsa_to_port(ds, switchdev_work->port); 2262 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 2263 dp->slave, &info.info, NULL); 2264 } 2265 2266 static void dsa_slave_switchdev_event_work(struct work_struct *work) 2267 { 2268 struct dsa_switchdev_event_work *switchdev_work = 2269 container_of(work, struct dsa_switchdev_event_work, work); 2270 struct dsa_switch *ds = switchdev_work->ds; 2271 struct dsa_port *dp; 2272 int err; 2273 2274 dp = dsa_to_port(ds, switchdev_work->port); 2275 2276 rtnl_lock(); 2277 switch (switchdev_work->event) { 2278 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2279 err = dsa_port_fdb_add(dp, switchdev_work->addr, 2280 switchdev_work->vid); 2281 if (err) { 2282 dev_err(ds->dev, 2283 "port %d failed to add %pM vid %d to fdb: %d\n", 2284 dp->index, switchdev_work->addr, 2285 switchdev_work->vid, err); 2286 break; 2287 } 2288 dsa_fdb_offload_notify(switchdev_work); 2289 break; 2290 2291 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2292 err = dsa_port_fdb_del(dp, switchdev_work->addr, 2293 switchdev_work->vid); 2294 if (err) { 2295 dev_err(ds->dev, 2296 "port %d failed to delete %pM vid %d from fdb: %d\n", 2297 dp->index, switchdev_work->addr, 2298 switchdev_work->vid, err); 2299 } 2300 2301 break; 2302 } 2303 rtnl_unlock(); 2304 2305 kfree(switchdev_work); 2306 if (dsa_is_user_port(ds, dp->index)) 2307 dev_put(dp->slave); 2308 } 2309 2310 static int dsa_lower_dev_walk(struct net_device *lower_dev, 2311 struct netdev_nested_priv *priv) 2312 { 2313 if (dsa_slave_dev_check(lower_dev)) { 2314 priv->data = (void *)netdev_priv(lower_dev); 2315 return 1; 2316 } 2317 2318 return 0; 2319 } 2320 2321 static struct dsa_slave_priv *dsa_slave_dev_lower_find(struct net_device *dev) 2322 { 2323 struct netdev_nested_priv priv = { 2324 .data = NULL, 2325 }; 2326 2327 netdev_walk_all_lower_dev_rcu(dev, dsa_lower_dev_walk, &priv); 2328 2329 return (struct dsa_slave_priv *)priv.data; 2330 } 2331 2332 /* Called under rcu_read_lock() */ 2333 static int dsa_slave_switchdev_event(struct notifier_block *unused, 2334 unsigned long event, void *ptr) 2335 { 2336 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2337 const struct switchdev_notifier_fdb_info *fdb_info; 2338 struct dsa_switchdev_event_work *switchdev_work; 2339 struct dsa_port *dp; 2340 int err; 2341 2342 switch (event) { 2343 case SWITCHDEV_PORT_ATTR_SET: 2344 err = switchdev_handle_port_attr_set(dev, ptr, 2345 dsa_slave_dev_check, 2346 dsa_slave_port_attr_set); 2347 return notifier_from_errno(err); 2348 case SWITCHDEV_FDB_ADD_TO_DEVICE: 2349 case SWITCHDEV_FDB_DEL_TO_DEVICE: 2350 fdb_info = ptr; 2351 2352 if (dsa_slave_dev_check(dev)) { 2353 if (!fdb_info->added_by_user || fdb_info->is_local) 2354 return NOTIFY_OK; 2355 2356 dp = dsa_slave_to_port(dev); 2357 } else { 2358 /* Snoop addresses learnt on foreign interfaces 2359 * bridged with us, for switches that don't 2360 * automatically learn SA from CPU-injected traffic 2361 */ 2362 struct net_device *br_dev; 2363 struct dsa_slave_priv *p; 2364 2365 br_dev = netdev_master_upper_dev_get_rcu(dev); 2366 if (!br_dev) 2367 return NOTIFY_DONE; 2368 2369 if (!netif_is_bridge_master(br_dev)) 2370 return NOTIFY_DONE; 2371 2372 p = dsa_slave_dev_lower_find(br_dev); 2373 if (!p) 2374 return NOTIFY_DONE; 2375 2376 dp = p->dp->cpu_dp; 2377 2378 if (!dp->ds->assisted_learning_on_cpu_port) 2379 return NOTIFY_DONE; 2380 2381 /* When the bridge learns an address on an offloaded 2382 * LAG we don't want to send traffic to the CPU, the 2383 * other ports bridged with the LAG should be able to 2384 * autonomously forward towards it. 2385 */ 2386 if (dsa_tree_offloads_bridge_port(dp->ds->dst, dev)) 2387 return NOTIFY_DONE; 2388 } 2389 2390 if (!dp->ds->ops->port_fdb_add || !dp->ds->ops->port_fdb_del) 2391 return NOTIFY_DONE; 2392 2393 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 2394 if (!switchdev_work) 2395 return NOTIFY_BAD; 2396 2397 INIT_WORK(&switchdev_work->work, 2398 dsa_slave_switchdev_event_work); 2399 switchdev_work->ds = dp->ds; 2400 switchdev_work->port = dp->index; 2401 switchdev_work->event = event; 2402 2403 ether_addr_copy(switchdev_work->addr, 2404 fdb_info->addr); 2405 switchdev_work->vid = fdb_info->vid; 2406 2407 /* Hold a reference on the slave for dsa_fdb_offload_notify */ 2408 if (dsa_is_user_port(dp->ds, dp->index)) 2409 dev_hold(dev); 2410 dsa_schedule_work(&switchdev_work->work); 2411 break; 2412 default: 2413 return NOTIFY_DONE; 2414 } 2415 2416 return NOTIFY_OK; 2417 } 2418 2419 static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, 2420 unsigned long event, void *ptr) 2421 { 2422 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 2423 int err; 2424 2425 switch (event) { 2426 case SWITCHDEV_PORT_OBJ_ADD: 2427 err = switchdev_handle_port_obj_add(dev, ptr, 2428 dsa_slave_dev_check, 2429 dsa_slave_port_obj_add); 2430 return notifier_from_errno(err); 2431 case SWITCHDEV_PORT_OBJ_DEL: 2432 err = switchdev_handle_port_obj_del(dev, ptr, 2433 dsa_slave_dev_check, 2434 dsa_slave_port_obj_del); 2435 return notifier_from_errno(err); 2436 case SWITCHDEV_PORT_ATTR_SET: 2437 err = switchdev_handle_port_attr_set(dev, ptr, 2438 dsa_slave_dev_check, 2439 dsa_slave_port_attr_set); 2440 return notifier_from_errno(err); 2441 } 2442 2443 return NOTIFY_DONE; 2444 } 2445 2446 static struct notifier_block dsa_slave_nb __read_mostly = { 2447 .notifier_call = dsa_slave_netdevice_event, 2448 }; 2449 2450 struct notifier_block dsa_slave_switchdev_notifier = { 2451 .notifier_call = dsa_slave_switchdev_event, 2452 }; 2453 2454 struct notifier_block dsa_slave_switchdev_blocking_notifier = { 2455 .notifier_call = dsa_slave_switchdev_blocking_event, 2456 }; 2457 2458 int dsa_slave_register_notifier(void) 2459 { 2460 struct notifier_block *nb; 2461 int err; 2462 2463 err = register_netdevice_notifier(&dsa_slave_nb); 2464 if (err) 2465 return err; 2466 2467 err = register_switchdev_notifier(&dsa_slave_switchdev_notifier); 2468 if (err) 2469 goto err_switchdev_nb; 2470 2471 nb = &dsa_slave_switchdev_blocking_notifier; 2472 err = register_switchdev_blocking_notifier(nb); 2473 if (err) 2474 goto err_switchdev_blocking_nb; 2475 2476 return 0; 2477 2478 err_switchdev_blocking_nb: 2479 unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2480 err_switchdev_nb: 2481 unregister_netdevice_notifier(&dsa_slave_nb); 2482 return err; 2483 } 2484 2485 void dsa_slave_unregister_notifier(void) 2486 { 2487 struct notifier_block *nb; 2488 int err; 2489 2490 nb = &dsa_slave_switchdev_blocking_notifier; 2491 err = unregister_switchdev_blocking_notifier(nb); 2492 if (err) 2493 pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err); 2494 2495 err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier); 2496 if (err) 2497 pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err); 2498 2499 err = unregister_netdevice_notifier(&dsa_slave_nb); 2500 if (err) 2501 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 2502 } 2503