1 /* 2 * net/dsa/slave.c - Slave device handling 3 * Copyright (c) 2008-2009 Marvell Semiconductor 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11 #include <linux/list.h> 12 #include <linux/etherdevice.h> 13 #include <linux/netdevice.h> 14 #include <linux/phy.h> 15 #include <linux/phy_fixed.h> 16 #include <linux/of_net.h> 17 #include <linux/of_mdio.h> 18 #include <linux/mdio.h> 19 #include <linux/list.h> 20 #include <net/rtnetlink.h> 21 #include <net/switchdev.h> 22 #include <net/pkt_cls.h> 23 #include <net/tc_act/tc_mirred.h> 24 #include <linux/if_bridge.h> 25 #include <linux/netpoll.h> 26 #include "dsa_priv.h" 27 28 static bool dsa_slave_dev_check(struct net_device *dev); 29 30 static int dsa_slave_notify(struct net_device *dev, unsigned long e, void *v) 31 { 32 struct dsa_slave_priv *p = netdev_priv(dev); 33 struct raw_notifier_head *nh = &p->dp->ds->dst->nh; 34 int err; 35 36 err = raw_notifier_call_chain(nh, e, v); 37 38 return notifier_to_errno(err); 39 } 40 41 /* slave mii_bus handling ***************************************************/ 42 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 43 { 44 struct dsa_switch *ds = bus->priv; 45 46 if (ds->phys_mii_mask & (1 << addr)) 47 return ds->ops->phy_read(ds, addr, reg); 48 49 return 0xffff; 50 } 51 52 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 53 { 54 struct dsa_switch *ds = bus->priv; 55 56 if (ds->phys_mii_mask & (1 << addr)) 57 return ds->ops->phy_write(ds, addr, reg, val); 58 59 return 0; 60 } 61 62 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 63 { 64 ds->slave_mii_bus->priv = (void *)ds; 65 ds->slave_mii_bus->name = "dsa slave smi"; 66 ds->slave_mii_bus->read = dsa_slave_phy_read; 67 ds->slave_mii_bus->write = dsa_slave_phy_write; 68 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 69 ds->dst->tree, ds->index); 70 ds->slave_mii_bus->parent = ds->dev; 71 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 72 } 73 74 75 /* slave device handling ****************************************************/ 76 static int dsa_slave_get_iflink(const struct net_device *dev) 77 { 78 struct dsa_slave_priv *p = netdev_priv(dev); 79 80 return p->dp->ds->dst->master_netdev->ifindex; 81 } 82 83 static inline bool dsa_port_is_bridged(struct dsa_port *dp) 84 { 85 return !!dp->bridge_dev; 86 } 87 88 static void dsa_slave_set_state(struct net_device *dev, u8 state) 89 { 90 struct dsa_slave_priv *p = netdev_priv(dev); 91 struct dsa_port *dp = p->dp; 92 struct dsa_switch *ds = dp->ds; 93 int port = dp->index; 94 95 if (ds->ops->port_stp_state_set) 96 ds->ops->port_stp_state_set(ds, port, state); 97 98 if (ds->ops->port_fast_age) { 99 /* Fast age FDB entries or flush appropriate forwarding database 100 * for the given port, if we are moving it from Learning or 101 * Forwarding state, to Disabled or Blocking or Listening state. 102 */ 103 104 if ((dp->stp_state == BR_STATE_LEARNING || 105 dp->stp_state == BR_STATE_FORWARDING) && 106 (state == BR_STATE_DISABLED || 107 state == BR_STATE_BLOCKING || 108 state == BR_STATE_LISTENING)) 109 ds->ops->port_fast_age(ds, port); 110 } 111 112 dp->stp_state = state; 113 } 114 115 static int dsa_slave_open(struct net_device *dev) 116 { 117 struct dsa_slave_priv *p = netdev_priv(dev); 118 struct net_device *master = p->dp->ds->dst->master_netdev; 119 struct dsa_switch *ds = p->dp->ds; 120 u8 stp_state = dsa_port_is_bridged(p->dp) ? 121 BR_STATE_BLOCKING : BR_STATE_FORWARDING; 122 int err; 123 124 if (!(master->flags & IFF_UP)) 125 return -ENETDOWN; 126 127 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 128 err = dev_uc_add(master, dev->dev_addr); 129 if (err < 0) 130 goto out; 131 } 132 133 if (dev->flags & IFF_ALLMULTI) { 134 err = dev_set_allmulti(master, 1); 135 if (err < 0) 136 goto del_unicast; 137 } 138 if (dev->flags & IFF_PROMISC) { 139 err = dev_set_promiscuity(master, 1); 140 if (err < 0) 141 goto clear_allmulti; 142 } 143 144 if (ds->ops->port_enable) { 145 err = ds->ops->port_enable(ds, p->dp->index, p->phy); 146 if (err) 147 goto clear_promisc; 148 } 149 150 dsa_slave_set_state(dev, stp_state); 151 152 if (p->phy) 153 phy_start(p->phy); 154 155 return 0; 156 157 clear_promisc: 158 if (dev->flags & IFF_PROMISC) 159 dev_set_promiscuity(master, -1); 160 clear_allmulti: 161 if (dev->flags & IFF_ALLMULTI) 162 dev_set_allmulti(master, -1); 163 del_unicast: 164 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 165 dev_uc_del(master, dev->dev_addr); 166 out: 167 return err; 168 } 169 170 static int dsa_slave_close(struct net_device *dev) 171 { 172 struct dsa_slave_priv *p = netdev_priv(dev); 173 struct net_device *master = p->dp->ds->dst->master_netdev; 174 struct dsa_switch *ds = p->dp->ds; 175 176 if (p->phy) 177 phy_stop(p->phy); 178 179 dev_mc_unsync(master, dev); 180 dev_uc_unsync(master, dev); 181 if (dev->flags & IFF_ALLMULTI) 182 dev_set_allmulti(master, -1); 183 if (dev->flags & IFF_PROMISC) 184 dev_set_promiscuity(master, -1); 185 186 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 187 dev_uc_del(master, dev->dev_addr); 188 189 if (ds->ops->port_disable) 190 ds->ops->port_disable(ds, p->dp->index, p->phy); 191 192 dsa_slave_set_state(dev, BR_STATE_DISABLED); 193 194 return 0; 195 } 196 197 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 198 { 199 struct dsa_slave_priv *p = netdev_priv(dev); 200 struct net_device *master = p->dp->ds->dst->master_netdev; 201 202 if (change & IFF_ALLMULTI) 203 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); 204 if (change & IFF_PROMISC) 205 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); 206 } 207 208 static void dsa_slave_set_rx_mode(struct net_device *dev) 209 { 210 struct dsa_slave_priv *p = netdev_priv(dev); 211 struct net_device *master = p->dp->ds->dst->master_netdev; 212 213 dev_mc_sync(master, dev); 214 dev_uc_sync(master, dev); 215 } 216 217 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 218 { 219 struct dsa_slave_priv *p = netdev_priv(dev); 220 struct net_device *master = p->dp->ds->dst->master_netdev; 221 struct sockaddr *addr = a; 222 int err; 223 224 if (!is_valid_ether_addr(addr->sa_data)) 225 return -EADDRNOTAVAIL; 226 227 if (!(dev->flags & IFF_UP)) 228 goto out; 229 230 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 231 err = dev_uc_add(master, addr->sa_data); 232 if (err < 0) 233 return err; 234 } 235 236 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 237 dev_uc_del(master, dev->dev_addr); 238 239 out: 240 ether_addr_copy(dev->dev_addr, addr->sa_data); 241 242 return 0; 243 } 244 245 static int dsa_slave_port_vlan_add(struct net_device *dev, 246 const struct switchdev_obj_port_vlan *vlan, 247 struct switchdev_trans *trans) 248 { 249 struct dsa_slave_priv *p = netdev_priv(dev); 250 struct dsa_port *dp = p->dp; 251 struct dsa_switch *ds = dp->ds; 252 253 if (switchdev_trans_ph_prepare(trans)) { 254 if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add) 255 return -EOPNOTSUPP; 256 257 return ds->ops->port_vlan_prepare(ds, dp->index, vlan, trans); 258 } 259 260 ds->ops->port_vlan_add(ds, dp->index, vlan, trans); 261 262 return 0; 263 } 264 265 static int dsa_slave_port_vlan_del(struct net_device *dev, 266 const struct switchdev_obj_port_vlan *vlan) 267 { 268 struct dsa_slave_priv *p = netdev_priv(dev); 269 struct dsa_switch *ds = p->dp->ds; 270 271 if (!ds->ops->port_vlan_del) 272 return -EOPNOTSUPP; 273 274 return ds->ops->port_vlan_del(ds, p->dp->index, vlan); 275 } 276 277 static int dsa_slave_port_vlan_dump(struct net_device *dev, 278 struct switchdev_obj_port_vlan *vlan, 279 switchdev_obj_dump_cb_t *cb) 280 { 281 struct dsa_slave_priv *p = netdev_priv(dev); 282 struct dsa_switch *ds = p->dp->ds; 283 284 if (ds->ops->port_vlan_dump) 285 return ds->ops->port_vlan_dump(ds, p->dp->index, vlan, cb); 286 287 return -EOPNOTSUPP; 288 } 289 290 static int dsa_slave_port_fdb_add(struct net_device *dev, 291 const struct switchdev_obj_port_fdb *fdb, 292 struct switchdev_trans *trans) 293 { 294 struct dsa_slave_priv *p = netdev_priv(dev); 295 struct dsa_switch *ds = p->dp->ds; 296 297 if (switchdev_trans_ph_prepare(trans)) { 298 if (!ds->ops->port_fdb_prepare || !ds->ops->port_fdb_add) 299 return -EOPNOTSUPP; 300 301 return ds->ops->port_fdb_prepare(ds, p->dp->index, fdb, trans); 302 } 303 304 ds->ops->port_fdb_add(ds, p->dp->index, fdb, trans); 305 306 return 0; 307 } 308 309 static int dsa_slave_port_fdb_del(struct net_device *dev, 310 const struct switchdev_obj_port_fdb *fdb) 311 { 312 struct dsa_slave_priv *p = netdev_priv(dev); 313 struct dsa_switch *ds = p->dp->ds; 314 int ret = -EOPNOTSUPP; 315 316 if (ds->ops->port_fdb_del) 317 ret = ds->ops->port_fdb_del(ds, p->dp->index, fdb); 318 319 return ret; 320 } 321 322 static int dsa_slave_port_fdb_dump(struct net_device *dev, 323 struct switchdev_obj_port_fdb *fdb, 324 switchdev_obj_dump_cb_t *cb) 325 { 326 struct dsa_slave_priv *p = netdev_priv(dev); 327 struct dsa_switch *ds = p->dp->ds; 328 329 if (ds->ops->port_fdb_dump) 330 return ds->ops->port_fdb_dump(ds, p->dp->index, fdb, cb); 331 332 return -EOPNOTSUPP; 333 } 334 335 static int dsa_slave_port_mdb_add(struct net_device *dev, 336 const struct switchdev_obj_port_mdb *mdb, 337 struct switchdev_trans *trans) 338 { 339 struct dsa_slave_priv *p = netdev_priv(dev); 340 struct dsa_switch *ds = p->dp->ds; 341 342 if (switchdev_trans_ph_prepare(trans)) { 343 if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add) 344 return -EOPNOTSUPP; 345 346 return ds->ops->port_mdb_prepare(ds, p->dp->index, mdb, trans); 347 } 348 349 ds->ops->port_mdb_add(ds, p->dp->index, mdb, trans); 350 351 return 0; 352 } 353 354 static int dsa_slave_port_mdb_del(struct net_device *dev, 355 const struct switchdev_obj_port_mdb *mdb) 356 { 357 struct dsa_slave_priv *p = netdev_priv(dev); 358 struct dsa_switch *ds = p->dp->ds; 359 360 if (ds->ops->port_mdb_del) 361 return ds->ops->port_mdb_del(ds, p->dp->index, mdb); 362 363 return -EOPNOTSUPP; 364 } 365 366 static int dsa_slave_port_mdb_dump(struct net_device *dev, 367 struct switchdev_obj_port_mdb *mdb, 368 switchdev_obj_dump_cb_t *cb) 369 { 370 struct dsa_slave_priv *p = netdev_priv(dev); 371 struct dsa_switch *ds = p->dp->ds; 372 373 if (ds->ops->port_mdb_dump) 374 return ds->ops->port_mdb_dump(ds, p->dp->index, mdb, cb); 375 376 return -EOPNOTSUPP; 377 } 378 379 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 380 { 381 struct dsa_slave_priv *p = netdev_priv(dev); 382 383 if (p->phy != NULL) 384 return phy_mii_ioctl(p->phy, ifr, cmd); 385 386 return -EOPNOTSUPP; 387 } 388 389 static int dsa_slave_stp_state_set(struct net_device *dev, 390 const struct switchdev_attr *attr, 391 struct switchdev_trans *trans) 392 { 393 struct dsa_slave_priv *p = netdev_priv(dev); 394 struct dsa_switch *ds = p->dp->ds; 395 396 if (switchdev_trans_ph_prepare(trans)) 397 return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP; 398 399 dsa_slave_set_state(dev, attr->u.stp_state); 400 401 return 0; 402 } 403 404 static int dsa_slave_vlan_filtering(struct net_device *dev, 405 const struct switchdev_attr *attr, 406 struct switchdev_trans *trans) 407 { 408 struct dsa_slave_priv *p = netdev_priv(dev); 409 struct dsa_switch *ds = p->dp->ds; 410 411 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */ 412 if (switchdev_trans_ph_prepare(trans)) 413 return 0; 414 415 if (ds->ops->port_vlan_filtering) 416 return ds->ops->port_vlan_filtering(ds, p->dp->index, 417 attr->u.vlan_filtering); 418 419 return 0; 420 } 421 422 static int dsa_fastest_ageing_time(struct dsa_switch *ds, 423 unsigned int ageing_time) 424 { 425 int i; 426 427 for (i = 0; i < ds->num_ports; ++i) { 428 struct dsa_port *dp = &ds->ports[i]; 429 430 if (dp && dp->ageing_time && dp->ageing_time < ageing_time) 431 ageing_time = dp->ageing_time; 432 } 433 434 return ageing_time; 435 } 436 437 static int dsa_slave_ageing_time(struct net_device *dev, 438 const struct switchdev_attr *attr, 439 struct switchdev_trans *trans) 440 { 441 struct dsa_slave_priv *p = netdev_priv(dev); 442 struct dsa_switch *ds = p->dp->ds; 443 unsigned long ageing_jiffies = clock_t_to_jiffies(attr->u.ageing_time); 444 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies); 445 446 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */ 447 if (switchdev_trans_ph_prepare(trans)) 448 return 0; 449 450 /* Keep the fastest ageing time in case of multiple bridges */ 451 p->dp->ageing_time = ageing_time; 452 ageing_time = dsa_fastest_ageing_time(ds, ageing_time); 453 454 if (ds->ops->set_ageing_time) 455 return ds->ops->set_ageing_time(ds, ageing_time); 456 457 return 0; 458 } 459 460 static int dsa_slave_port_attr_set(struct net_device *dev, 461 const struct switchdev_attr *attr, 462 struct switchdev_trans *trans) 463 { 464 int ret; 465 466 switch (attr->id) { 467 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 468 ret = dsa_slave_stp_state_set(dev, attr, trans); 469 break; 470 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 471 ret = dsa_slave_vlan_filtering(dev, attr, trans); 472 break; 473 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 474 ret = dsa_slave_ageing_time(dev, attr, trans); 475 break; 476 default: 477 ret = -EOPNOTSUPP; 478 break; 479 } 480 481 return ret; 482 } 483 484 static int dsa_slave_port_obj_add(struct net_device *dev, 485 const struct switchdev_obj *obj, 486 struct switchdev_trans *trans) 487 { 488 int err; 489 490 /* For the prepare phase, ensure the full set of changes is feasable in 491 * one go in order to signal a failure properly. If an operation is not 492 * supported, return -EOPNOTSUPP. 493 */ 494 495 switch (obj->id) { 496 case SWITCHDEV_OBJ_ID_PORT_FDB: 497 err = dsa_slave_port_fdb_add(dev, 498 SWITCHDEV_OBJ_PORT_FDB(obj), 499 trans); 500 break; 501 case SWITCHDEV_OBJ_ID_PORT_MDB: 502 err = dsa_slave_port_mdb_add(dev, SWITCHDEV_OBJ_PORT_MDB(obj), 503 trans); 504 break; 505 case SWITCHDEV_OBJ_ID_PORT_VLAN: 506 err = dsa_slave_port_vlan_add(dev, 507 SWITCHDEV_OBJ_PORT_VLAN(obj), 508 trans); 509 break; 510 default: 511 err = -EOPNOTSUPP; 512 break; 513 } 514 515 return err; 516 } 517 518 static int dsa_slave_port_obj_del(struct net_device *dev, 519 const struct switchdev_obj *obj) 520 { 521 int err; 522 523 switch (obj->id) { 524 case SWITCHDEV_OBJ_ID_PORT_FDB: 525 err = dsa_slave_port_fdb_del(dev, 526 SWITCHDEV_OBJ_PORT_FDB(obj)); 527 break; 528 case SWITCHDEV_OBJ_ID_PORT_MDB: 529 err = dsa_slave_port_mdb_del(dev, SWITCHDEV_OBJ_PORT_MDB(obj)); 530 break; 531 case SWITCHDEV_OBJ_ID_PORT_VLAN: 532 err = dsa_slave_port_vlan_del(dev, 533 SWITCHDEV_OBJ_PORT_VLAN(obj)); 534 break; 535 default: 536 err = -EOPNOTSUPP; 537 break; 538 } 539 540 return err; 541 } 542 543 static int dsa_slave_port_obj_dump(struct net_device *dev, 544 struct switchdev_obj *obj, 545 switchdev_obj_dump_cb_t *cb) 546 { 547 int err; 548 549 switch (obj->id) { 550 case SWITCHDEV_OBJ_ID_PORT_FDB: 551 err = dsa_slave_port_fdb_dump(dev, 552 SWITCHDEV_OBJ_PORT_FDB(obj), 553 cb); 554 break; 555 case SWITCHDEV_OBJ_ID_PORT_MDB: 556 err = dsa_slave_port_mdb_dump(dev, SWITCHDEV_OBJ_PORT_MDB(obj), 557 cb); 558 break; 559 case SWITCHDEV_OBJ_ID_PORT_VLAN: 560 err = dsa_slave_port_vlan_dump(dev, 561 SWITCHDEV_OBJ_PORT_VLAN(obj), 562 cb); 563 break; 564 default: 565 err = -EOPNOTSUPP; 566 break; 567 } 568 569 return err; 570 } 571 572 static int dsa_slave_bridge_port_join(struct net_device *dev, 573 struct net_device *br) 574 { 575 struct dsa_slave_priv *p = netdev_priv(dev); 576 struct dsa_notifier_bridge_info info = { 577 .sw_index = p->dp->ds->index, 578 .port = p->dp->index, 579 .br = br, 580 }; 581 int err; 582 583 /* Here the port is already bridged. Reflect the current configuration 584 * so that drivers can program their chips accordingly. 585 */ 586 p->dp->bridge_dev = br; 587 588 err = dsa_slave_notify(dev, DSA_NOTIFIER_BRIDGE_JOIN, &info); 589 590 /* The bridging is rolled back on error */ 591 if (err) 592 p->dp->bridge_dev = NULL; 593 594 return err; 595 } 596 597 static void dsa_slave_bridge_port_leave(struct net_device *dev, 598 struct net_device *br) 599 { 600 struct dsa_slave_priv *p = netdev_priv(dev); 601 struct dsa_notifier_bridge_info info = { 602 .sw_index = p->dp->ds->index, 603 .port = p->dp->index, 604 .br = br, 605 }; 606 int err; 607 608 /* Here the port is already unbridged. Reflect the current configuration 609 * so that drivers can program their chips accordingly. 610 */ 611 p->dp->bridge_dev = NULL; 612 613 err = dsa_slave_notify(dev, DSA_NOTIFIER_BRIDGE_LEAVE, &info); 614 if (err) 615 netdev_err(dev, "failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n"); 616 617 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 618 * so allow it to be in BR_STATE_FORWARDING to be kept functional 619 */ 620 dsa_slave_set_state(dev, BR_STATE_FORWARDING); 621 } 622 623 static int dsa_slave_port_attr_get(struct net_device *dev, 624 struct switchdev_attr *attr) 625 { 626 struct dsa_slave_priv *p = netdev_priv(dev); 627 struct dsa_switch *ds = p->dp->ds; 628 629 switch (attr->id) { 630 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: 631 attr->u.ppid.id_len = sizeof(ds->index); 632 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len); 633 break; 634 default: 635 return -EOPNOTSUPP; 636 } 637 638 return 0; 639 } 640 641 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p, 642 struct sk_buff *skb) 643 { 644 #ifdef CONFIG_NET_POLL_CONTROLLER 645 if (p->netpoll) 646 netpoll_send_skb(p->netpoll, skb); 647 #else 648 BUG(); 649 #endif 650 return NETDEV_TX_OK; 651 } 652 653 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 654 { 655 struct dsa_slave_priv *p = netdev_priv(dev); 656 struct sk_buff *nskb; 657 658 dev->stats.tx_packets++; 659 dev->stats.tx_bytes += skb->len; 660 661 /* Transmit function may have to reallocate the original SKB */ 662 nskb = p->xmit(skb, dev); 663 if (!nskb) 664 return NETDEV_TX_OK; 665 666 /* SKB for netpoll still need to be mangled with the protocol-specific 667 * tag to be successfully transmitted 668 */ 669 if (unlikely(netpoll_tx_running(dev))) 670 return dsa_netpoll_send_skb(p, nskb); 671 672 /* Queue the SKB for transmission on the parent interface, but 673 * do not modify its EtherType 674 */ 675 nskb->dev = p->dp->ds->dst->master_netdev; 676 dev_queue_xmit(nskb); 677 678 return NETDEV_TX_OK; 679 } 680 681 /* ethtool operations *******************************************************/ 682 static int 683 dsa_slave_get_link_ksettings(struct net_device *dev, 684 struct ethtool_link_ksettings *cmd) 685 { 686 struct dsa_slave_priv *p = netdev_priv(dev); 687 int err = -EOPNOTSUPP; 688 689 if (p->phy != NULL) 690 err = phy_ethtool_ksettings_get(p->phy, cmd); 691 692 return err; 693 } 694 695 static int 696 dsa_slave_set_link_ksettings(struct net_device *dev, 697 const struct ethtool_link_ksettings *cmd) 698 { 699 struct dsa_slave_priv *p = netdev_priv(dev); 700 701 if (p->phy != NULL) 702 return phy_ethtool_ksettings_set(p->phy, cmd); 703 704 return -EOPNOTSUPP; 705 } 706 707 static void dsa_slave_get_drvinfo(struct net_device *dev, 708 struct ethtool_drvinfo *drvinfo) 709 { 710 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 711 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 712 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 713 } 714 715 static int dsa_slave_get_regs_len(struct net_device *dev) 716 { 717 struct dsa_slave_priv *p = netdev_priv(dev); 718 struct dsa_switch *ds = p->dp->ds; 719 720 if (ds->ops->get_regs_len) 721 return ds->ops->get_regs_len(ds, p->dp->index); 722 723 return -EOPNOTSUPP; 724 } 725 726 static void 727 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 728 { 729 struct dsa_slave_priv *p = netdev_priv(dev); 730 struct dsa_switch *ds = p->dp->ds; 731 732 if (ds->ops->get_regs) 733 ds->ops->get_regs(ds, p->dp->index, regs, _p); 734 } 735 736 static int dsa_slave_nway_reset(struct net_device *dev) 737 { 738 struct dsa_slave_priv *p = netdev_priv(dev); 739 740 if (p->phy != NULL) 741 return genphy_restart_aneg(p->phy); 742 743 return -EOPNOTSUPP; 744 } 745 746 static u32 dsa_slave_get_link(struct net_device *dev) 747 { 748 struct dsa_slave_priv *p = netdev_priv(dev); 749 750 if (p->phy != NULL) { 751 genphy_update_link(p->phy); 752 return p->phy->link; 753 } 754 755 return -EOPNOTSUPP; 756 } 757 758 static int dsa_slave_get_eeprom_len(struct net_device *dev) 759 { 760 struct dsa_slave_priv *p = netdev_priv(dev); 761 struct dsa_switch *ds = p->dp->ds; 762 763 if (ds->cd && ds->cd->eeprom_len) 764 return ds->cd->eeprom_len; 765 766 if (ds->ops->get_eeprom_len) 767 return ds->ops->get_eeprom_len(ds); 768 769 return 0; 770 } 771 772 static int dsa_slave_get_eeprom(struct net_device *dev, 773 struct ethtool_eeprom *eeprom, u8 *data) 774 { 775 struct dsa_slave_priv *p = netdev_priv(dev); 776 struct dsa_switch *ds = p->dp->ds; 777 778 if (ds->ops->get_eeprom) 779 return ds->ops->get_eeprom(ds, eeprom, data); 780 781 return -EOPNOTSUPP; 782 } 783 784 static int dsa_slave_set_eeprom(struct net_device *dev, 785 struct ethtool_eeprom *eeprom, u8 *data) 786 { 787 struct dsa_slave_priv *p = netdev_priv(dev); 788 struct dsa_switch *ds = p->dp->ds; 789 790 if (ds->ops->set_eeprom) 791 return ds->ops->set_eeprom(ds, eeprom, data); 792 793 return -EOPNOTSUPP; 794 } 795 796 static void dsa_slave_get_strings(struct net_device *dev, 797 uint32_t stringset, uint8_t *data) 798 { 799 struct dsa_slave_priv *p = netdev_priv(dev); 800 struct dsa_switch *ds = p->dp->ds; 801 802 if (stringset == ETH_SS_STATS) { 803 int len = ETH_GSTRING_LEN; 804 805 strncpy(data, "tx_packets", len); 806 strncpy(data + len, "tx_bytes", len); 807 strncpy(data + 2 * len, "rx_packets", len); 808 strncpy(data + 3 * len, "rx_bytes", len); 809 if (ds->ops->get_strings) 810 ds->ops->get_strings(ds, p->dp->index, data + 4 * len); 811 } 812 } 813 814 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev, 815 struct ethtool_stats *stats, 816 uint64_t *data) 817 { 818 struct dsa_switch_tree *dst = dev->dsa_ptr; 819 struct dsa_switch *ds = dst->cpu_switch; 820 s8 cpu_port = dst->cpu_port; 821 int count = 0; 822 823 if (dst->master_ethtool_ops.get_sset_count) { 824 count = dst->master_ethtool_ops.get_sset_count(dev, 825 ETH_SS_STATS); 826 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data); 827 } 828 829 if (ds->ops->get_ethtool_stats) 830 ds->ops->get_ethtool_stats(ds, cpu_port, data + count); 831 } 832 833 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset) 834 { 835 struct dsa_switch_tree *dst = dev->dsa_ptr; 836 struct dsa_switch *ds = dst->cpu_switch; 837 int count = 0; 838 839 if (dst->master_ethtool_ops.get_sset_count) 840 count += dst->master_ethtool_ops.get_sset_count(dev, sset); 841 842 if (sset == ETH_SS_STATS && ds->ops->get_sset_count) 843 count += ds->ops->get_sset_count(ds); 844 845 return count; 846 } 847 848 static void dsa_cpu_port_get_strings(struct net_device *dev, 849 uint32_t stringset, uint8_t *data) 850 { 851 struct dsa_switch_tree *dst = dev->dsa_ptr; 852 struct dsa_switch *ds = dst->cpu_switch; 853 s8 cpu_port = dst->cpu_port; 854 int len = ETH_GSTRING_LEN; 855 int mcount = 0, count; 856 unsigned int i; 857 uint8_t pfx[4]; 858 uint8_t *ndata; 859 860 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port); 861 /* We do not want to be NULL-terminated, since this is a prefix */ 862 pfx[sizeof(pfx) - 1] = '_'; 863 864 if (dst->master_ethtool_ops.get_sset_count) { 865 mcount = dst->master_ethtool_ops.get_sset_count(dev, 866 ETH_SS_STATS); 867 dst->master_ethtool_ops.get_strings(dev, stringset, data); 868 } 869 870 if (stringset == ETH_SS_STATS && ds->ops->get_strings) { 871 ndata = data + mcount * len; 872 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle 873 * the output after to prepend our CPU port prefix we 874 * constructed earlier 875 */ 876 ds->ops->get_strings(ds, cpu_port, ndata); 877 count = ds->ops->get_sset_count(ds); 878 for (i = 0; i < count; i++) { 879 memmove(ndata + (i * len + sizeof(pfx)), 880 ndata + i * len, len - sizeof(pfx)); 881 memcpy(ndata + i * len, pfx, sizeof(pfx)); 882 } 883 } 884 } 885 886 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 887 struct ethtool_stats *stats, 888 uint64_t *data) 889 { 890 struct dsa_slave_priv *p = netdev_priv(dev); 891 struct dsa_switch *ds = p->dp->ds; 892 893 data[0] = dev->stats.tx_packets; 894 data[1] = dev->stats.tx_bytes; 895 data[2] = dev->stats.rx_packets; 896 data[3] = dev->stats.rx_bytes; 897 if (ds->ops->get_ethtool_stats) 898 ds->ops->get_ethtool_stats(ds, p->dp->index, data + 4); 899 } 900 901 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 902 { 903 struct dsa_slave_priv *p = netdev_priv(dev); 904 struct dsa_switch *ds = p->dp->ds; 905 906 if (sset == ETH_SS_STATS) { 907 int count; 908 909 count = 4; 910 if (ds->ops->get_sset_count) 911 count += ds->ops->get_sset_count(ds); 912 913 return count; 914 } 915 916 return -EOPNOTSUPP; 917 } 918 919 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 920 { 921 struct dsa_slave_priv *p = netdev_priv(dev); 922 struct dsa_switch *ds = p->dp->ds; 923 924 if (ds->ops->get_wol) 925 ds->ops->get_wol(ds, p->dp->index, w); 926 } 927 928 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 929 { 930 struct dsa_slave_priv *p = netdev_priv(dev); 931 struct dsa_switch *ds = p->dp->ds; 932 int ret = -EOPNOTSUPP; 933 934 if (ds->ops->set_wol) 935 ret = ds->ops->set_wol(ds, p->dp->index, w); 936 937 return ret; 938 } 939 940 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 941 { 942 struct dsa_slave_priv *p = netdev_priv(dev); 943 struct dsa_switch *ds = p->dp->ds; 944 int ret; 945 946 if (!ds->ops->set_eee) 947 return -EOPNOTSUPP; 948 949 ret = ds->ops->set_eee(ds, p->dp->index, p->phy, e); 950 if (ret) 951 return ret; 952 953 if (p->phy) 954 ret = phy_ethtool_set_eee(p->phy, e); 955 956 return ret; 957 } 958 959 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 960 { 961 struct dsa_slave_priv *p = netdev_priv(dev); 962 struct dsa_switch *ds = p->dp->ds; 963 int ret; 964 965 if (!ds->ops->get_eee) 966 return -EOPNOTSUPP; 967 968 ret = ds->ops->get_eee(ds, p->dp->index, e); 969 if (ret) 970 return ret; 971 972 if (p->phy) 973 ret = phy_ethtool_get_eee(p->phy, e); 974 975 return ret; 976 } 977 978 #ifdef CONFIG_NET_POLL_CONTROLLER 979 static int dsa_slave_netpoll_setup(struct net_device *dev, 980 struct netpoll_info *ni) 981 { 982 struct dsa_slave_priv *p = netdev_priv(dev); 983 struct dsa_switch *ds = p->dp->ds; 984 struct net_device *master = ds->dst->master_netdev; 985 struct netpoll *netpoll; 986 int err = 0; 987 988 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 989 if (!netpoll) 990 return -ENOMEM; 991 992 err = __netpoll_setup(netpoll, master); 993 if (err) { 994 kfree(netpoll); 995 goto out; 996 } 997 998 p->netpoll = netpoll; 999 out: 1000 return err; 1001 } 1002 1003 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 1004 { 1005 struct dsa_slave_priv *p = netdev_priv(dev); 1006 struct netpoll *netpoll = p->netpoll; 1007 1008 if (!netpoll) 1009 return; 1010 1011 p->netpoll = NULL; 1012 1013 __netpoll_free_async(netpoll); 1014 } 1015 1016 static void dsa_slave_poll_controller(struct net_device *dev) 1017 { 1018 } 1019 #endif 1020 1021 static int dsa_slave_get_phys_port_name(struct net_device *dev, 1022 char *name, size_t len) 1023 { 1024 struct dsa_slave_priv *p = netdev_priv(dev); 1025 1026 if (snprintf(name, len, "p%d", p->dp->index) >= len) 1027 return -EINVAL; 1028 1029 return 0; 1030 } 1031 1032 static struct dsa_mall_tc_entry * 1033 dsa_slave_mall_tc_entry_find(struct dsa_slave_priv *p, 1034 unsigned long cookie) 1035 { 1036 struct dsa_mall_tc_entry *mall_tc_entry; 1037 1038 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1039 if (mall_tc_entry->cookie == cookie) 1040 return mall_tc_entry; 1041 1042 return NULL; 1043 } 1044 1045 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1046 __be16 protocol, 1047 struct tc_cls_matchall_offload *cls, 1048 bool ingress) 1049 { 1050 struct dsa_slave_priv *p = netdev_priv(dev); 1051 struct dsa_mall_tc_entry *mall_tc_entry; 1052 struct dsa_switch *ds = p->dp->ds; 1053 struct net *net = dev_net(dev); 1054 struct dsa_slave_priv *to_p; 1055 struct net_device *to_dev; 1056 const struct tc_action *a; 1057 int err = -EOPNOTSUPP; 1058 LIST_HEAD(actions); 1059 int ifindex; 1060 1061 if (!ds->ops->port_mirror_add) 1062 return err; 1063 1064 if (!tc_single_action(cls->exts)) 1065 return err; 1066 1067 tcf_exts_to_list(cls->exts, &actions); 1068 a = list_first_entry(&actions, struct tc_action, list); 1069 1070 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) { 1071 struct dsa_mall_mirror_tc_entry *mirror; 1072 1073 ifindex = tcf_mirred_ifindex(a); 1074 to_dev = __dev_get_by_index(net, ifindex); 1075 if (!to_dev) 1076 return -EINVAL; 1077 1078 if (!dsa_slave_dev_check(to_dev)) 1079 return -EOPNOTSUPP; 1080 1081 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1082 if (!mall_tc_entry) 1083 return -ENOMEM; 1084 1085 mall_tc_entry->cookie = cls->cookie; 1086 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1087 mirror = &mall_tc_entry->mirror; 1088 1089 to_p = netdev_priv(to_dev); 1090 1091 mirror->to_local_port = to_p->dp->index; 1092 mirror->ingress = ingress; 1093 1094 err = ds->ops->port_mirror_add(ds, p->dp->index, mirror, 1095 ingress); 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 1104 return 0; 1105 } 1106 1107 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1108 struct tc_cls_matchall_offload *cls) 1109 { 1110 struct dsa_slave_priv *p = netdev_priv(dev); 1111 struct dsa_mall_tc_entry *mall_tc_entry; 1112 struct dsa_switch *ds = p->dp->ds; 1113 1114 if (!ds->ops->port_mirror_del) 1115 return; 1116 1117 mall_tc_entry = dsa_slave_mall_tc_entry_find(p, cls->cookie); 1118 if (!mall_tc_entry) 1119 return; 1120 1121 list_del(&mall_tc_entry->list); 1122 1123 switch (mall_tc_entry->type) { 1124 case DSA_PORT_MALL_MIRROR: 1125 ds->ops->port_mirror_del(ds, p->dp->index, 1126 &mall_tc_entry->mirror); 1127 break; 1128 default: 1129 WARN_ON(1); 1130 } 1131 1132 kfree(mall_tc_entry); 1133 } 1134 1135 static int dsa_slave_setup_tc(struct net_device *dev, u32 handle, 1136 __be16 protocol, struct tc_to_netdev *tc) 1137 { 1138 bool ingress = TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS); 1139 int ret = -EOPNOTSUPP; 1140 1141 switch (tc->type) { 1142 case TC_SETUP_MATCHALL: 1143 switch (tc->cls_mall->command) { 1144 case TC_CLSMATCHALL_REPLACE: 1145 return dsa_slave_add_cls_matchall(dev, protocol, 1146 tc->cls_mall, 1147 ingress); 1148 case TC_CLSMATCHALL_DESTROY: 1149 dsa_slave_del_cls_matchall(dev, tc->cls_mall); 1150 return 0; 1151 } 1152 default: 1153 break; 1154 } 1155 1156 return ret; 1157 } 1158 1159 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops) 1160 { 1161 ops->get_sset_count = dsa_cpu_port_get_sset_count; 1162 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats; 1163 ops->get_strings = dsa_cpu_port_get_strings; 1164 } 1165 1166 static int dsa_slave_get_rxnfc(struct net_device *dev, 1167 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1168 { 1169 struct dsa_slave_priv *p = netdev_priv(dev); 1170 struct dsa_switch *ds = p->dp->ds; 1171 1172 if (!ds->ops->get_rxnfc) 1173 return -EOPNOTSUPP; 1174 1175 return ds->ops->get_rxnfc(ds, p->dp->index, nfc, rule_locs); 1176 } 1177 1178 static int dsa_slave_set_rxnfc(struct net_device *dev, 1179 struct ethtool_rxnfc *nfc) 1180 { 1181 struct dsa_slave_priv *p = netdev_priv(dev); 1182 struct dsa_switch *ds = p->dp->ds; 1183 1184 if (!ds->ops->set_rxnfc) 1185 return -EOPNOTSUPP; 1186 1187 return ds->ops->set_rxnfc(ds, p->dp->index, nfc); 1188 } 1189 1190 static const struct ethtool_ops dsa_slave_ethtool_ops = { 1191 .get_drvinfo = dsa_slave_get_drvinfo, 1192 .get_regs_len = dsa_slave_get_regs_len, 1193 .get_regs = dsa_slave_get_regs, 1194 .nway_reset = dsa_slave_nway_reset, 1195 .get_link = dsa_slave_get_link, 1196 .get_eeprom_len = dsa_slave_get_eeprom_len, 1197 .get_eeprom = dsa_slave_get_eeprom, 1198 .set_eeprom = dsa_slave_set_eeprom, 1199 .get_strings = dsa_slave_get_strings, 1200 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 1201 .get_sset_count = dsa_slave_get_sset_count, 1202 .set_wol = dsa_slave_set_wol, 1203 .get_wol = dsa_slave_get_wol, 1204 .set_eee = dsa_slave_set_eee, 1205 .get_eee = dsa_slave_get_eee, 1206 .get_link_ksettings = dsa_slave_get_link_ksettings, 1207 .set_link_ksettings = dsa_slave_set_link_ksettings, 1208 .get_rxnfc = dsa_slave_get_rxnfc, 1209 .set_rxnfc = dsa_slave_set_rxnfc, 1210 }; 1211 1212 static const struct net_device_ops dsa_slave_netdev_ops = { 1213 .ndo_open = dsa_slave_open, 1214 .ndo_stop = dsa_slave_close, 1215 .ndo_start_xmit = dsa_slave_xmit, 1216 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 1217 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 1218 .ndo_set_mac_address = dsa_slave_set_mac_address, 1219 .ndo_fdb_add = switchdev_port_fdb_add, 1220 .ndo_fdb_del = switchdev_port_fdb_del, 1221 .ndo_fdb_dump = switchdev_port_fdb_dump, 1222 .ndo_do_ioctl = dsa_slave_ioctl, 1223 .ndo_get_iflink = dsa_slave_get_iflink, 1224 #ifdef CONFIG_NET_POLL_CONTROLLER 1225 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 1226 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 1227 .ndo_poll_controller = dsa_slave_poll_controller, 1228 #endif 1229 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 1230 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 1231 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 1232 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 1233 .ndo_setup_tc = dsa_slave_setup_tc, 1234 }; 1235 1236 static const struct switchdev_ops dsa_slave_switchdev_ops = { 1237 .switchdev_port_attr_get = dsa_slave_port_attr_get, 1238 .switchdev_port_attr_set = dsa_slave_port_attr_set, 1239 .switchdev_port_obj_add = dsa_slave_port_obj_add, 1240 .switchdev_port_obj_del = dsa_slave_port_obj_del, 1241 .switchdev_port_obj_dump = dsa_slave_port_obj_dump, 1242 }; 1243 1244 static struct device_type dsa_type = { 1245 .name = "dsa", 1246 }; 1247 1248 static void dsa_slave_adjust_link(struct net_device *dev) 1249 { 1250 struct dsa_slave_priv *p = netdev_priv(dev); 1251 struct dsa_switch *ds = p->dp->ds; 1252 unsigned int status_changed = 0; 1253 1254 if (p->old_link != p->phy->link) { 1255 status_changed = 1; 1256 p->old_link = p->phy->link; 1257 } 1258 1259 if (p->old_duplex != p->phy->duplex) { 1260 status_changed = 1; 1261 p->old_duplex = p->phy->duplex; 1262 } 1263 1264 if (p->old_pause != p->phy->pause) { 1265 status_changed = 1; 1266 p->old_pause = p->phy->pause; 1267 } 1268 1269 if (ds->ops->adjust_link && status_changed) 1270 ds->ops->adjust_link(ds, p->dp->index, p->phy); 1271 1272 if (status_changed) 1273 phy_print_status(p->phy); 1274 } 1275 1276 static int dsa_slave_fixed_link_update(struct net_device *dev, 1277 struct fixed_phy_status *status) 1278 { 1279 struct dsa_slave_priv *p; 1280 struct dsa_switch *ds; 1281 1282 if (dev) { 1283 p = netdev_priv(dev); 1284 ds = p->dp->ds; 1285 if (ds->ops->fixed_link_update) 1286 ds->ops->fixed_link_update(ds, p->dp->index, status); 1287 } 1288 1289 return 0; 1290 } 1291 1292 /* slave device setup *******************************************************/ 1293 static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 1294 struct net_device *slave_dev, 1295 int addr) 1296 { 1297 struct dsa_switch *ds = p->dp->ds; 1298 1299 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr); 1300 if (!p->phy) { 1301 netdev_err(slave_dev, "no phy at %d\n", addr); 1302 return -ENODEV; 1303 } 1304 1305 /* Use already configured phy mode */ 1306 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1307 p->phy_interface = p->phy->interface; 1308 return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 1309 p->phy_interface); 1310 } 1311 1312 static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 1313 struct net_device *slave_dev) 1314 { 1315 struct dsa_switch *ds = p->dp->ds; 1316 struct device_node *phy_dn, *port_dn; 1317 bool phy_is_fixed = false; 1318 u32 phy_flags = 0; 1319 int mode, ret; 1320 1321 port_dn = p->dp->dn; 1322 mode = of_get_phy_mode(port_dn); 1323 if (mode < 0) 1324 mode = PHY_INTERFACE_MODE_NA; 1325 p->phy_interface = mode; 1326 1327 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1328 if (!phy_dn && of_phy_is_fixed_link(port_dn)) { 1329 /* In the case of a fixed PHY, the DT node associated 1330 * to the fixed PHY is the Port DT node 1331 */ 1332 ret = of_phy_register_fixed_link(port_dn); 1333 if (ret) { 1334 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1335 return ret; 1336 } 1337 phy_is_fixed = true; 1338 phy_dn = of_node_get(port_dn); 1339 } 1340 1341 if (ds->ops->get_phy_flags) 1342 phy_flags = ds->ops->get_phy_flags(ds, p->dp->index); 1343 1344 if (phy_dn) { 1345 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 1346 1347 /* If this PHY address is part of phys_mii_mask, which means 1348 * that we need to divert reads and writes to/from it, then we 1349 * want to bind this device using the slave MII bus created by 1350 * DSA to make that happen. 1351 */ 1352 if (!phy_is_fixed && phy_id >= 0 && 1353 (ds->phys_mii_mask & (1 << phy_id))) { 1354 ret = dsa_slave_phy_connect(p, slave_dev, phy_id); 1355 if (ret) { 1356 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); 1357 of_node_put(phy_dn); 1358 return ret; 1359 } 1360 } else { 1361 p->phy = of_phy_connect(slave_dev, phy_dn, 1362 dsa_slave_adjust_link, 1363 phy_flags, 1364 p->phy_interface); 1365 } 1366 1367 of_node_put(phy_dn); 1368 } 1369 1370 if (p->phy && phy_is_fixed) 1371 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 1372 1373 /* We could not connect to a designated PHY, so use the switch internal 1374 * MDIO bus instead 1375 */ 1376 if (!p->phy) { 1377 ret = dsa_slave_phy_connect(p, slave_dev, p->dp->index); 1378 if (ret) { 1379 netdev_err(slave_dev, "failed to connect to port %d: %d\n", 1380 p->dp->index, ret); 1381 if (phy_is_fixed) 1382 of_phy_deregister_fixed_link(port_dn); 1383 return ret; 1384 } 1385 } 1386 1387 phy_attached_info(p->phy); 1388 1389 return 0; 1390 } 1391 1392 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1393 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1394 struct netdev_queue *txq, 1395 void *_unused) 1396 { 1397 lockdep_set_class(&txq->_xmit_lock, 1398 &dsa_slave_netdev_xmit_lock_key); 1399 } 1400 1401 int dsa_slave_suspend(struct net_device *slave_dev) 1402 { 1403 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1404 1405 netif_device_detach(slave_dev); 1406 1407 if (p->phy) { 1408 phy_stop(p->phy); 1409 p->old_pause = -1; 1410 p->old_link = -1; 1411 p->old_duplex = -1; 1412 phy_suspend(p->phy); 1413 } 1414 1415 return 0; 1416 } 1417 1418 int dsa_slave_resume(struct net_device *slave_dev) 1419 { 1420 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1421 1422 netif_device_attach(slave_dev); 1423 1424 if (p->phy) { 1425 phy_resume(p->phy); 1426 phy_start(p->phy); 1427 } 1428 1429 return 0; 1430 } 1431 1432 int dsa_slave_create(struct dsa_switch *ds, struct device *parent, 1433 int port, const char *name) 1434 { 1435 struct dsa_switch_tree *dst = ds->dst; 1436 struct net_device *master; 1437 struct net_device *slave_dev; 1438 struct dsa_slave_priv *p; 1439 int ret; 1440 1441 master = ds->dst->master_netdev; 1442 if (ds->master_netdev) 1443 master = ds->master_netdev; 1444 1445 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, 1446 NET_NAME_UNKNOWN, ether_setup); 1447 if (slave_dev == NULL) 1448 return -ENOMEM; 1449 1450 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1451 slave_dev->hw_features |= NETIF_F_HW_TC; 1452 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1453 eth_hw_addr_inherit(slave_dev, master); 1454 slave_dev->priv_flags |= IFF_NO_QUEUE; 1455 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1456 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1457 slave_dev->min_mtu = 0; 1458 slave_dev->max_mtu = ETH_MAX_MTU; 1459 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1460 1461 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1462 NULL); 1463 1464 SET_NETDEV_DEV(slave_dev, parent); 1465 slave_dev->dev.of_node = ds->ports[port].dn; 1466 slave_dev->vlan_features = master->vlan_features; 1467 1468 p = netdev_priv(slave_dev); 1469 p->dp = &ds->ports[port]; 1470 INIT_LIST_HEAD(&p->mall_tc_list); 1471 p->xmit = dst->tag_ops->xmit; 1472 1473 p->old_pause = -1; 1474 p->old_link = -1; 1475 p->old_duplex = -1; 1476 1477 ds->ports[port].netdev = slave_dev; 1478 ret = register_netdev(slave_dev); 1479 if (ret) { 1480 netdev_err(master, "error %d registering interface %s\n", 1481 ret, slave_dev->name); 1482 ds->ports[port].netdev = NULL; 1483 free_netdev(slave_dev); 1484 return ret; 1485 } 1486 1487 netif_carrier_off(slave_dev); 1488 1489 ret = dsa_slave_phy_setup(p, slave_dev); 1490 if (ret) { 1491 netdev_err(master, "error %d setting up slave phy\n", ret); 1492 unregister_netdev(slave_dev); 1493 free_netdev(slave_dev); 1494 return ret; 1495 } 1496 1497 return 0; 1498 } 1499 1500 void dsa_slave_destroy(struct net_device *slave_dev) 1501 { 1502 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1503 struct device_node *port_dn; 1504 1505 port_dn = p->dp->dn; 1506 1507 netif_carrier_off(slave_dev); 1508 if (p->phy) { 1509 phy_disconnect(p->phy); 1510 1511 if (of_phy_is_fixed_link(port_dn)) 1512 of_phy_deregister_fixed_link(port_dn); 1513 } 1514 unregister_netdev(slave_dev); 1515 free_netdev(slave_dev); 1516 } 1517 1518 static bool dsa_slave_dev_check(struct net_device *dev) 1519 { 1520 return dev->netdev_ops == &dsa_slave_netdev_ops; 1521 } 1522 1523 static int dsa_slave_changeupper(struct net_device *dev, 1524 struct netdev_notifier_changeupper_info *info) 1525 { 1526 int err = NOTIFY_DONE; 1527 1528 if (netif_is_bridge_master(info->upper_dev)) { 1529 if (info->linking) { 1530 err = dsa_slave_bridge_port_join(dev, info->upper_dev); 1531 err = notifier_from_errno(err); 1532 } else { 1533 dsa_slave_bridge_port_leave(dev, info->upper_dev); 1534 err = NOTIFY_OK; 1535 } 1536 } 1537 1538 return err; 1539 } 1540 1541 static int dsa_slave_netdevice_event(struct notifier_block *nb, 1542 unsigned long event, void *ptr) 1543 { 1544 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1545 1546 if (dev->netdev_ops != &dsa_slave_netdev_ops) 1547 return NOTIFY_DONE; 1548 1549 if (event == NETDEV_CHANGEUPPER) 1550 return dsa_slave_changeupper(dev, ptr); 1551 1552 return NOTIFY_DONE; 1553 } 1554 1555 static struct notifier_block dsa_slave_nb __read_mostly = { 1556 .notifier_call = dsa_slave_netdevice_event, 1557 }; 1558 1559 int dsa_slave_register_notifier(void) 1560 { 1561 return register_netdevice_notifier(&dsa_slave_nb); 1562 } 1563 1564 void dsa_slave_unregister_notifier(void) 1565 { 1566 int err; 1567 1568 err = unregister_netdevice_notifier(&dsa_slave_nb); 1569 if (err) 1570 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 1571 } 1572