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