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/dsa.h> 21 #include <net/rtnetlink.h> 22 #include <net/switchdev.h> 23 #include <net/pkt_cls.h> 24 #include <net/tc_act/tc_mirred.h> 25 #include <linux/if_bridge.h> 26 #include <linux/netpoll.h> 27 #include "dsa_priv.h" 28 29 static bool dsa_slave_dev_check(struct net_device *dev); 30 31 static int dsa_slave_notify(struct net_device *dev, unsigned long e, void *v) 32 { 33 struct dsa_slave_priv *p = netdev_priv(dev); 34 struct raw_notifier_head *nh = &p->dp->ds->dst->nh; 35 int err; 36 37 err = raw_notifier_call_chain(nh, e, v); 38 39 return notifier_to_errno(err); 40 } 41 42 /* slave mii_bus handling ***************************************************/ 43 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 44 { 45 struct dsa_switch *ds = bus->priv; 46 47 if (ds->phys_mii_mask & (1 << addr)) 48 return ds->ops->phy_read(ds, addr, reg); 49 50 return 0xffff; 51 } 52 53 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 54 { 55 struct dsa_switch *ds = bus->priv; 56 57 if (ds->phys_mii_mask & (1 << addr)) 58 return ds->ops->phy_write(ds, addr, reg, val); 59 60 return 0; 61 } 62 63 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 64 { 65 ds->slave_mii_bus->priv = (void *)ds; 66 ds->slave_mii_bus->name = "dsa slave smi"; 67 ds->slave_mii_bus->read = dsa_slave_phy_read; 68 ds->slave_mii_bus->write = dsa_slave_phy_write; 69 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 70 ds->dst->tree, ds->index); 71 ds->slave_mii_bus->parent = ds->dev; 72 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 73 } 74 75 76 /* slave device handling ****************************************************/ 77 static int dsa_slave_get_iflink(const struct net_device *dev) 78 { 79 struct dsa_slave_priv *p = netdev_priv(dev); 80 81 return p->dp->ds->dst->master_netdev->ifindex; 82 } 83 84 static inline bool dsa_port_is_bridged(struct dsa_port *dp) 85 { 86 return !!dp->bridge_dev; 87 } 88 89 static void dsa_slave_set_state(struct net_device *dev, u8 state) 90 { 91 struct dsa_slave_priv *p = netdev_priv(dev); 92 struct dsa_port *dp = p->dp; 93 struct dsa_switch *ds = dp->ds; 94 int port = dp->index; 95 96 if (ds->ops->port_stp_state_set) 97 ds->ops->port_stp_state_set(ds, port, state); 98 99 if (ds->ops->port_fast_age) { 100 /* Fast age FDB entries or flush appropriate forwarding database 101 * for the given port, if we are moving it from Learning or 102 * Forwarding state, to Disabled or Blocking or Listening state. 103 */ 104 105 if ((dp->stp_state == BR_STATE_LEARNING || 106 dp->stp_state == BR_STATE_FORWARDING) && 107 (state == BR_STATE_DISABLED || 108 state == BR_STATE_BLOCKING || 109 state == BR_STATE_LISTENING)) 110 ds->ops->port_fast_age(ds, port); 111 } 112 113 dp->stp_state = state; 114 } 115 116 static int dsa_slave_open(struct net_device *dev) 117 { 118 struct dsa_slave_priv *p = netdev_priv(dev); 119 struct net_device *master = p->dp->ds->dst->master_netdev; 120 struct dsa_switch *ds = p->dp->ds; 121 u8 stp_state = dsa_port_is_bridged(p->dp) ? 122 BR_STATE_BLOCKING : BR_STATE_FORWARDING; 123 int err; 124 125 if (!(master->flags & IFF_UP)) 126 return -ENETDOWN; 127 128 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 129 err = dev_uc_add(master, dev->dev_addr); 130 if (err < 0) 131 goto out; 132 } 133 134 if (dev->flags & IFF_ALLMULTI) { 135 err = dev_set_allmulti(master, 1); 136 if (err < 0) 137 goto del_unicast; 138 } 139 if (dev->flags & IFF_PROMISC) { 140 err = dev_set_promiscuity(master, 1); 141 if (err < 0) 142 goto clear_allmulti; 143 } 144 145 if (ds->ops->port_enable) { 146 err = ds->ops->port_enable(ds, p->dp->index, p->phy); 147 if (err) 148 goto clear_promisc; 149 } 150 151 dsa_slave_set_state(dev, stp_state); 152 153 if (p->phy) 154 phy_start(p->phy); 155 156 return 0; 157 158 clear_promisc: 159 if (dev->flags & IFF_PROMISC) 160 dev_set_promiscuity(master, -1); 161 clear_allmulti: 162 if (dev->flags & IFF_ALLMULTI) 163 dev_set_allmulti(master, -1); 164 del_unicast: 165 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 166 dev_uc_del(master, dev->dev_addr); 167 out: 168 return err; 169 } 170 171 static int dsa_slave_close(struct net_device *dev) 172 { 173 struct dsa_slave_priv *p = netdev_priv(dev); 174 struct net_device *master = p->dp->ds->dst->master_netdev; 175 struct dsa_switch *ds = p->dp->ds; 176 177 if (p->phy) 178 phy_stop(p->phy); 179 180 dev_mc_unsync(master, dev); 181 dev_uc_unsync(master, dev); 182 if (dev->flags & IFF_ALLMULTI) 183 dev_set_allmulti(master, -1); 184 if (dev->flags & IFF_PROMISC) 185 dev_set_promiscuity(master, -1); 186 187 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 188 dev_uc_del(master, dev->dev_addr); 189 190 if (ds->ops->port_disable) 191 ds->ops->port_disable(ds, p->dp->index, p->phy); 192 193 dsa_slave_set_state(dev, BR_STATE_DISABLED); 194 195 return 0; 196 } 197 198 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 199 { 200 struct dsa_slave_priv *p = netdev_priv(dev); 201 struct net_device *master = p->dp->ds->dst->master_netdev; 202 203 if (change & IFF_ALLMULTI) 204 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); 205 if (change & IFF_PROMISC) 206 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); 207 } 208 209 static void dsa_slave_set_rx_mode(struct net_device *dev) 210 { 211 struct dsa_slave_priv *p = netdev_priv(dev); 212 struct net_device *master = p->dp->ds->dst->master_netdev; 213 214 dev_mc_sync(master, dev); 215 dev_uc_sync(master, dev); 216 } 217 218 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 219 { 220 struct dsa_slave_priv *p = netdev_priv(dev); 221 struct net_device *master = p->dp->ds->dst->master_netdev; 222 struct sockaddr *addr = a; 223 int err; 224 225 if (!is_valid_ether_addr(addr->sa_data)) 226 return -EADDRNOTAVAIL; 227 228 if (!(dev->flags & IFF_UP)) 229 goto out; 230 231 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 232 err = dev_uc_add(master, addr->sa_data); 233 if (err < 0) 234 return err; 235 } 236 237 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 238 dev_uc_del(master, dev->dev_addr); 239 240 out: 241 ether_addr_copy(dev->dev_addr, addr->sa_data); 242 243 return 0; 244 } 245 246 static int dsa_slave_port_vlan_add(struct net_device *dev, 247 const struct switchdev_obj_port_vlan *vlan, 248 struct switchdev_trans *trans) 249 { 250 struct dsa_slave_priv *p = netdev_priv(dev); 251 struct dsa_port *dp = p->dp; 252 struct dsa_switch *ds = dp->ds; 253 254 if (switchdev_trans_ph_prepare(trans)) { 255 if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add) 256 return -EOPNOTSUPP; 257 258 return ds->ops->port_vlan_prepare(ds, dp->index, vlan, trans); 259 } 260 261 ds->ops->port_vlan_add(ds, dp->index, vlan, trans); 262 263 return 0; 264 } 265 266 static int dsa_slave_port_vlan_del(struct net_device *dev, 267 const struct switchdev_obj_port_vlan *vlan) 268 { 269 struct dsa_slave_priv *p = netdev_priv(dev); 270 struct dsa_switch *ds = p->dp->ds; 271 272 if (!ds->ops->port_vlan_del) 273 return -EOPNOTSUPP; 274 275 return ds->ops->port_vlan_del(ds, p->dp->index, vlan); 276 } 277 278 static int dsa_slave_port_vlan_dump(struct net_device *dev, 279 struct switchdev_obj_port_vlan *vlan, 280 switchdev_obj_dump_cb_t *cb) 281 { 282 struct dsa_slave_priv *p = netdev_priv(dev); 283 struct dsa_switch *ds = p->dp->ds; 284 285 if (ds->ops->port_vlan_dump) 286 return ds->ops->port_vlan_dump(ds, p->dp->index, vlan, cb); 287 288 return -EOPNOTSUPP; 289 } 290 291 static int dsa_slave_port_fdb_add(struct net_device *dev, 292 const struct switchdev_obj_port_fdb *fdb, 293 struct switchdev_trans *trans) 294 { 295 struct dsa_slave_priv *p = netdev_priv(dev); 296 struct dsa_switch *ds = p->dp->ds; 297 298 if (switchdev_trans_ph_prepare(trans)) { 299 if (!ds->ops->port_fdb_prepare || !ds->ops->port_fdb_add) 300 return -EOPNOTSUPP; 301 302 return ds->ops->port_fdb_prepare(ds, p->dp->index, fdb, trans); 303 } 304 305 ds->ops->port_fdb_add(ds, p->dp->index, fdb, trans); 306 307 return 0; 308 } 309 310 static int dsa_slave_port_fdb_del(struct net_device *dev, 311 const struct switchdev_obj_port_fdb *fdb) 312 { 313 struct dsa_slave_priv *p = netdev_priv(dev); 314 struct dsa_switch *ds = p->dp->ds; 315 int ret = -EOPNOTSUPP; 316 317 if (ds->ops->port_fdb_del) 318 ret = ds->ops->port_fdb_del(ds, p->dp->index, fdb); 319 320 return ret; 321 } 322 323 static int dsa_slave_port_fdb_dump(struct net_device *dev, 324 struct switchdev_obj_port_fdb *fdb, 325 switchdev_obj_dump_cb_t *cb) 326 { 327 struct dsa_slave_priv *p = netdev_priv(dev); 328 struct dsa_switch *ds = p->dp->ds; 329 330 if (ds->ops->port_fdb_dump) 331 return ds->ops->port_fdb_dump(ds, p->dp->index, fdb, cb); 332 333 return -EOPNOTSUPP; 334 } 335 336 static int dsa_slave_port_mdb_add(struct net_device *dev, 337 const struct switchdev_obj_port_mdb *mdb, 338 struct switchdev_trans *trans) 339 { 340 struct dsa_slave_priv *p = netdev_priv(dev); 341 struct dsa_switch *ds = p->dp->ds; 342 343 if (switchdev_trans_ph_prepare(trans)) { 344 if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add) 345 return -EOPNOTSUPP; 346 347 return ds->ops->port_mdb_prepare(ds, p->dp->index, mdb, trans); 348 } 349 350 ds->ops->port_mdb_add(ds, p->dp->index, mdb, trans); 351 352 return 0; 353 } 354 355 static int dsa_slave_port_mdb_del(struct net_device *dev, 356 const struct switchdev_obj_port_mdb *mdb) 357 { 358 struct dsa_slave_priv *p = netdev_priv(dev); 359 struct dsa_switch *ds = p->dp->ds; 360 361 if (ds->ops->port_mdb_del) 362 return ds->ops->port_mdb_del(ds, p->dp->index, mdb); 363 364 return -EOPNOTSUPP; 365 } 366 367 static int dsa_slave_port_mdb_dump(struct net_device *dev, 368 struct switchdev_obj_port_mdb *mdb, 369 switchdev_obj_dump_cb_t *cb) 370 { 371 struct dsa_slave_priv *p = netdev_priv(dev); 372 struct dsa_switch *ds = p->dp->ds; 373 374 if (ds->ops->port_mdb_dump) 375 return ds->ops->port_mdb_dump(ds, p->dp->index, mdb, cb); 376 377 return -EOPNOTSUPP; 378 } 379 380 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 381 { 382 struct dsa_slave_priv *p = netdev_priv(dev); 383 384 if (p->phy != NULL) 385 return phy_mii_ioctl(p->phy, ifr, cmd); 386 387 return -EOPNOTSUPP; 388 } 389 390 static int dsa_slave_stp_state_set(struct net_device *dev, 391 const struct switchdev_attr *attr, 392 struct switchdev_trans *trans) 393 { 394 struct dsa_slave_priv *p = netdev_priv(dev); 395 struct dsa_switch *ds = p->dp->ds; 396 397 if (switchdev_trans_ph_prepare(trans)) 398 return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP; 399 400 dsa_slave_set_state(dev, attr->u.stp_state); 401 402 return 0; 403 } 404 405 static int dsa_slave_vlan_filtering(struct net_device *dev, 406 const struct switchdev_attr *attr, 407 struct switchdev_trans *trans) 408 { 409 struct dsa_slave_priv *p = netdev_priv(dev); 410 struct dsa_switch *ds = p->dp->ds; 411 412 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */ 413 if (switchdev_trans_ph_prepare(trans)) 414 return 0; 415 416 if (ds->ops->port_vlan_filtering) 417 return ds->ops->port_vlan_filtering(ds, p->dp->index, 418 attr->u.vlan_filtering); 419 420 return 0; 421 } 422 423 static unsigned int dsa_fastest_ageing_time(struct dsa_switch *ds, 424 unsigned int ageing_time) 425 { 426 int i; 427 428 for (i = 0; i < ds->num_ports; ++i) { 429 struct dsa_port *dp = &ds->ports[i]; 430 431 if (dp && dp->ageing_time && dp->ageing_time < ageing_time) 432 ageing_time = dp->ageing_time; 433 } 434 435 return ageing_time; 436 } 437 438 static int dsa_slave_ageing_time(struct net_device *dev, 439 const struct switchdev_attr *attr, 440 struct switchdev_trans *trans) 441 { 442 struct dsa_slave_priv *p = netdev_priv(dev); 443 struct dsa_switch *ds = p->dp->ds; 444 unsigned long ageing_jiffies = clock_t_to_jiffies(attr->u.ageing_time); 445 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies); 446 447 if (switchdev_trans_ph_prepare(trans)) { 448 if (ds->ageing_time_min && ageing_time < ds->ageing_time_min) 449 return -ERANGE; 450 if (ds->ageing_time_max && ageing_time > ds->ageing_time_max) 451 return -ERANGE; 452 return 0; 453 } 454 455 /* Keep the fastest ageing time in case of multiple bridges */ 456 p->dp->ageing_time = ageing_time; 457 ageing_time = dsa_fastest_ageing_time(ds, ageing_time); 458 459 if (ds->ops->set_ageing_time) 460 return ds->ops->set_ageing_time(ds, ageing_time); 461 462 return 0; 463 } 464 465 static int dsa_slave_port_attr_set(struct net_device *dev, 466 const struct switchdev_attr *attr, 467 struct switchdev_trans *trans) 468 { 469 int ret; 470 471 switch (attr->id) { 472 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 473 ret = dsa_slave_stp_state_set(dev, attr, trans); 474 break; 475 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 476 ret = dsa_slave_vlan_filtering(dev, attr, trans); 477 break; 478 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 479 ret = dsa_slave_ageing_time(dev, attr, trans); 480 break; 481 default: 482 ret = -EOPNOTSUPP; 483 break; 484 } 485 486 return ret; 487 } 488 489 static int dsa_slave_port_obj_add(struct net_device *dev, 490 const struct switchdev_obj *obj, 491 struct switchdev_trans *trans) 492 { 493 int err; 494 495 /* For the prepare phase, ensure the full set of changes is feasable in 496 * one go in order to signal a failure properly. If an operation is not 497 * supported, return -EOPNOTSUPP. 498 */ 499 500 switch (obj->id) { 501 case SWITCHDEV_OBJ_ID_PORT_FDB: 502 err = dsa_slave_port_fdb_add(dev, 503 SWITCHDEV_OBJ_PORT_FDB(obj), 504 trans); 505 break; 506 case SWITCHDEV_OBJ_ID_PORT_MDB: 507 err = dsa_slave_port_mdb_add(dev, SWITCHDEV_OBJ_PORT_MDB(obj), 508 trans); 509 break; 510 case SWITCHDEV_OBJ_ID_PORT_VLAN: 511 err = dsa_slave_port_vlan_add(dev, 512 SWITCHDEV_OBJ_PORT_VLAN(obj), 513 trans); 514 break; 515 default: 516 err = -EOPNOTSUPP; 517 break; 518 } 519 520 return err; 521 } 522 523 static int dsa_slave_port_obj_del(struct net_device *dev, 524 const struct switchdev_obj *obj) 525 { 526 int err; 527 528 switch (obj->id) { 529 case SWITCHDEV_OBJ_ID_PORT_FDB: 530 err = dsa_slave_port_fdb_del(dev, 531 SWITCHDEV_OBJ_PORT_FDB(obj)); 532 break; 533 case SWITCHDEV_OBJ_ID_PORT_MDB: 534 err = dsa_slave_port_mdb_del(dev, SWITCHDEV_OBJ_PORT_MDB(obj)); 535 break; 536 case SWITCHDEV_OBJ_ID_PORT_VLAN: 537 err = dsa_slave_port_vlan_del(dev, 538 SWITCHDEV_OBJ_PORT_VLAN(obj)); 539 break; 540 default: 541 err = -EOPNOTSUPP; 542 break; 543 } 544 545 return err; 546 } 547 548 static int dsa_slave_port_obj_dump(struct net_device *dev, 549 struct switchdev_obj *obj, 550 switchdev_obj_dump_cb_t *cb) 551 { 552 int err; 553 554 switch (obj->id) { 555 case SWITCHDEV_OBJ_ID_PORT_FDB: 556 err = dsa_slave_port_fdb_dump(dev, 557 SWITCHDEV_OBJ_PORT_FDB(obj), 558 cb); 559 break; 560 case SWITCHDEV_OBJ_ID_PORT_MDB: 561 err = dsa_slave_port_mdb_dump(dev, SWITCHDEV_OBJ_PORT_MDB(obj), 562 cb); 563 break; 564 case SWITCHDEV_OBJ_ID_PORT_VLAN: 565 err = dsa_slave_port_vlan_dump(dev, 566 SWITCHDEV_OBJ_PORT_VLAN(obj), 567 cb); 568 break; 569 default: 570 err = -EOPNOTSUPP; 571 break; 572 } 573 574 return err; 575 } 576 577 static int dsa_slave_bridge_port_join(struct net_device *dev, 578 struct net_device *br) 579 { 580 struct dsa_slave_priv *p = netdev_priv(dev); 581 struct dsa_notifier_bridge_info info = { 582 .sw_index = p->dp->ds->index, 583 .port = p->dp->index, 584 .br = br, 585 }; 586 int err; 587 588 /* Here the port is already bridged. Reflect the current configuration 589 * so that drivers can program their chips accordingly. 590 */ 591 p->dp->bridge_dev = br; 592 593 err = dsa_slave_notify(dev, DSA_NOTIFIER_BRIDGE_JOIN, &info); 594 595 /* The bridging is rolled back on error */ 596 if (err) 597 p->dp->bridge_dev = NULL; 598 599 return err; 600 } 601 602 static void dsa_slave_bridge_port_leave(struct net_device *dev, 603 struct net_device *br) 604 { 605 struct dsa_slave_priv *p = netdev_priv(dev); 606 struct dsa_notifier_bridge_info info = { 607 .sw_index = p->dp->ds->index, 608 .port = p->dp->index, 609 .br = br, 610 }; 611 int err; 612 613 /* Here the port is already unbridged. Reflect the current configuration 614 * so that drivers can program their chips accordingly. 615 */ 616 p->dp->bridge_dev = NULL; 617 618 err = dsa_slave_notify(dev, DSA_NOTIFIER_BRIDGE_LEAVE, &info); 619 if (err) 620 netdev_err(dev, "failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n"); 621 622 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 623 * so allow it to be in BR_STATE_FORWARDING to be kept functional 624 */ 625 dsa_slave_set_state(dev, BR_STATE_FORWARDING); 626 } 627 628 static int dsa_slave_port_attr_get(struct net_device *dev, 629 struct switchdev_attr *attr) 630 { 631 struct dsa_slave_priv *p = netdev_priv(dev); 632 struct dsa_switch *ds = p->dp->ds; 633 634 switch (attr->id) { 635 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: 636 attr->u.ppid.id_len = sizeof(ds->index); 637 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len); 638 break; 639 default: 640 return -EOPNOTSUPP; 641 } 642 643 return 0; 644 } 645 646 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p, 647 struct sk_buff *skb) 648 { 649 #ifdef CONFIG_NET_POLL_CONTROLLER 650 if (p->netpoll) 651 netpoll_send_skb(p->netpoll, skb); 652 #else 653 BUG(); 654 #endif 655 return NETDEV_TX_OK; 656 } 657 658 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 659 { 660 struct dsa_slave_priv *p = netdev_priv(dev); 661 struct sk_buff *nskb; 662 663 dev->stats.tx_packets++; 664 dev->stats.tx_bytes += skb->len; 665 666 /* Transmit function may have to reallocate the original SKB */ 667 nskb = p->xmit(skb, dev); 668 if (!nskb) 669 return NETDEV_TX_OK; 670 671 /* SKB for netpoll still need to be mangled with the protocol-specific 672 * tag to be successfully transmitted 673 */ 674 if (unlikely(netpoll_tx_running(dev))) 675 return dsa_netpoll_send_skb(p, nskb); 676 677 /* Queue the SKB for transmission on the parent interface, but 678 * do not modify its EtherType 679 */ 680 nskb->dev = p->dp->ds->dst->master_netdev; 681 dev_queue_xmit(nskb); 682 683 return NETDEV_TX_OK; 684 } 685 686 /* ethtool operations *******************************************************/ 687 static int 688 dsa_slave_get_link_ksettings(struct net_device *dev, 689 struct ethtool_link_ksettings *cmd) 690 { 691 struct dsa_slave_priv *p = netdev_priv(dev); 692 int err = -EOPNOTSUPP; 693 694 if (p->phy != NULL) 695 err = phy_ethtool_ksettings_get(p->phy, cmd); 696 697 return err; 698 } 699 700 static int 701 dsa_slave_set_link_ksettings(struct net_device *dev, 702 const struct ethtool_link_ksettings *cmd) 703 { 704 struct dsa_slave_priv *p = netdev_priv(dev); 705 706 if (p->phy != NULL) 707 return phy_ethtool_ksettings_set(p->phy, cmd); 708 709 return -EOPNOTSUPP; 710 } 711 712 static void dsa_slave_get_drvinfo(struct net_device *dev, 713 struct ethtool_drvinfo *drvinfo) 714 { 715 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 716 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 717 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 718 } 719 720 static int dsa_slave_get_regs_len(struct net_device *dev) 721 { 722 struct dsa_slave_priv *p = netdev_priv(dev); 723 struct dsa_switch *ds = p->dp->ds; 724 725 if (ds->ops->get_regs_len) 726 return ds->ops->get_regs_len(ds, p->dp->index); 727 728 return -EOPNOTSUPP; 729 } 730 731 static void 732 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 733 { 734 struct dsa_slave_priv *p = netdev_priv(dev); 735 struct dsa_switch *ds = p->dp->ds; 736 737 if (ds->ops->get_regs) 738 ds->ops->get_regs(ds, p->dp->index, regs, _p); 739 } 740 741 static int dsa_slave_nway_reset(struct net_device *dev) 742 { 743 struct dsa_slave_priv *p = netdev_priv(dev); 744 745 if (p->phy != NULL) 746 return genphy_restart_aneg(p->phy); 747 748 return -EOPNOTSUPP; 749 } 750 751 static u32 dsa_slave_get_link(struct net_device *dev) 752 { 753 struct dsa_slave_priv *p = netdev_priv(dev); 754 755 if (p->phy != NULL) { 756 genphy_update_link(p->phy); 757 return p->phy->link; 758 } 759 760 return -EOPNOTSUPP; 761 } 762 763 static int dsa_slave_get_eeprom_len(struct net_device *dev) 764 { 765 struct dsa_slave_priv *p = netdev_priv(dev); 766 struct dsa_switch *ds = p->dp->ds; 767 768 if (ds->cd && ds->cd->eeprom_len) 769 return ds->cd->eeprom_len; 770 771 if (ds->ops->get_eeprom_len) 772 return ds->ops->get_eeprom_len(ds); 773 774 return 0; 775 } 776 777 static int dsa_slave_get_eeprom(struct net_device *dev, 778 struct ethtool_eeprom *eeprom, u8 *data) 779 { 780 struct dsa_slave_priv *p = netdev_priv(dev); 781 struct dsa_switch *ds = p->dp->ds; 782 783 if (ds->ops->get_eeprom) 784 return ds->ops->get_eeprom(ds, eeprom, data); 785 786 return -EOPNOTSUPP; 787 } 788 789 static int dsa_slave_set_eeprom(struct net_device *dev, 790 struct ethtool_eeprom *eeprom, u8 *data) 791 { 792 struct dsa_slave_priv *p = netdev_priv(dev); 793 struct dsa_switch *ds = p->dp->ds; 794 795 if (ds->ops->set_eeprom) 796 return ds->ops->set_eeprom(ds, eeprom, data); 797 798 return -EOPNOTSUPP; 799 } 800 801 static void dsa_slave_get_strings(struct net_device *dev, 802 uint32_t stringset, uint8_t *data) 803 { 804 struct dsa_slave_priv *p = netdev_priv(dev); 805 struct dsa_switch *ds = p->dp->ds; 806 807 if (stringset == ETH_SS_STATS) { 808 int len = ETH_GSTRING_LEN; 809 810 strncpy(data, "tx_packets", len); 811 strncpy(data + len, "tx_bytes", len); 812 strncpy(data + 2 * len, "rx_packets", len); 813 strncpy(data + 3 * len, "rx_bytes", len); 814 if (ds->ops->get_strings) 815 ds->ops->get_strings(ds, p->dp->index, data + 4 * len); 816 } 817 } 818 819 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev, 820 struct ethtool_stats *stats, 821 uint64_t *data) 822 { 823 struct dsa_switch_tree *dst = dev->dsa_ptr; 824 struct dsa_switch *ds = dst->cpu_switch; 825 s8 cpu_port = dst->cpu_port; 826 int count = 0; 827 828 if (dst->master_ethtool_ops.get_sset_count) { 829 count = dst->master_ethtool_ops.get_sset_count(dev, 830 ETH_SS_STATS); 831 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data); 832 } 833 834 if (ds->ops->get_ethtool_stats) 835 ds->ops->get_ethtool_stats(ds, cpu_port, data + count); 836 } 837 838 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset) 839 { 840 struct dsa_switch_tree *dst = dev->dsa_ptr; 841 struct dsa_switch *ds = dst->cpu_switch; 842 int count = 0; 843 844 if (dst->master_ethtool_ops.get_sset_count) 845 count += dst->master_ethtool_ops.get_sset_count(dev, sset); 846 847 if (sset == ETH_SS_STATS && ds->ops->get_sset_count) 848 count += ds->ops->get_sset_count(ds); 849 850 return count; 851 } 852 853 static void dsa_cpu_port_get_strings(struct net_device *dev, 854 uint32_t stringset, uint8_t *data) 855 { 856 struct dsa_switch_tree *dst = dev->dsa_ptr; 857 struct dsa_switch *ds = dst->cpu_switch; 858 s8 cpu_port = dst->cpu_port; 859 int len = ETH_GSTRING_LEN; 860 int mcount = 0, count; 861 unsigned int i; 862 uint8_t pfx[4]; 863 uint8_t *ndata; 864 865 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port); 866 /* We do not want to be NULL-terminated, since this is a prefix */ 867 pfx[sizeof(pfx) - 1] = '_'; 868 869 if (dst->master_ethtool_ops.get_sset_count) { 870 mcount = dst->master_ethtool_ops.get_sset_count(dev, 871 ETH_SS_STATS); 872 dst->master_ethtool_ops.get_strings(dev, stringset, data); 873 } 874 875 if (stringset == ETH_SS_STATS && ds->ops->get_strings) { 876 ndata = data + mcount * len; 877 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle 878 * the output after to prepend our CPU port prefix we 879 * constructed earlier 880 */ 881 ds->ops->get_strings(ds, cpu_port, ndata); 882 count = ds->ops->get_sset_count(ds); 883 for (i = 0; i < count; i++) { 884 memmove(ndata + (i * len + sizeof(pfx)), 885 ndata + i * len, len - sizeof(pfx)); 886 memcpy(ndata + i * len, pfx, sizeof(pfx)); 887 } 888 } 889 } 890 891 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 892 struct ethtool_stats *stats, 893 uint64_t *data) 894 { 895 struct dsa_slave_priv *p = netdev_priv(dev); 896 struct dsa_switch *ds = p->dp->ds; 897 898 data[0] = dev->stats.tx_packets; 899 data[1] = dev->stats.tx_bytes; 900 data[2] = dev->stats.rx_packets; 901 data[3] = dev->stats.rx_bytes; 902 if (ds->ops->get_ethtool_stats) 903 ds->ops->get_ethtool_stats(ds, p->dp->index, data + 4); 904 } 905 906 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 907 { 908 struct dsa_slave_priv *p = netdev_priv(dev); 909 struct dsa_switch *ds = p->dp->ds; 910 911 if (sset == ETH_SS_STATS) { 912 int count; 913 914 count = 4; 915 if (ds->ops->get_sset_count) 916 count += ds->ops->get_sset_count(ds); 917 918 return count; 919 } 920 921 return -EOPNOTSUPP; 922 } 923 924 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 925 { 926 struct dsa_slave_priv *p = netdev_priv(dev); 927 struct dsa_switch *ds = p->dp->ds; 928 929 if (ds->ops->get_wol) 930 ds->ops->get_wol(ds, p->dp->index, w); 931 } 932 933 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 934 { 935 struct dsa_slave_priv *p = netdev_priv(dev); 936 struct dsa_switch *ds = p->dp->ds; 937 int ret = -EOPNOTSUPP; 938 939 if (ds->ops->set_wol) 940 ret = ds->ops->set_wol(ds, p->dp->index, w); 941 942 return ret; 943 } 944 945 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 946 { 947 struct dsa_slave_priv *p = netdev_priv(dev); 948 struct dsa_switch *ds = p->dp->ds; 949 int ret; 950 951 if (!ds->ops->set_eee) 952 return -EOPNOTSUPP; 953 954 ret = ds->ops->set_eee(ds, p->dp->index, p->phy, e); 955 if (ret) 956 return ret; 957 958 if (p->phy) 959 ret = phy_ethtool_set_eee(p->phy, e); 960 961 return ret; 962 } 963 964 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 965 { 966 struct dsa_slave_priv *p = netdev_priv(dev); 967 struct dsa_switch *ds = p->dp->ds; 968 int ret; 969 970 if (!ds->ops->get_eee) 971 return -EOPNOTSUPP; 972 973 ret = ds->ops->get_eee(ds, p->dp->index, e); 974 if (ret) 975 return ret; 976 977 if (p->phy) 978 ret = phy_ethtool_get_eee(p->phy, e); 979 980 return ret; 981 } 982 983 #ifdef CONFIG_NET_POLL_CONTROLLER 984 static int dsa_slave_netpoll_setup(struct net_device *dev, 985 struct netpoll_info *ni) 986 { 987 struct dsa_slave_priv *p = netdev_priv(dev); 988 struct dsa_switch *ds = p->dp->ds; 989 struct net_device *master = ds->dst->master_netdev; 990 struct netpoll *netpoll; 991 int err = 0; 992 993 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 994 if (!netpoll) 995 return -ENOMEM; 996 997 err = __netpoll_setup(netpoll, master); 998 if (err) { 999 kfree(netpoll); 1000 goto out; 1001 } 1002 1003 p->netpoll = netpoll; 1004 out: 1005 return err; 1006 } 1007 1008 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 1009 { 1010 struct dsa_slave_priv *p = netdev_priv(dev); 1011 struct netpoll *netpoll = p->netpoll; 1012 1013 if (!netpoll) 1014 return; 1015 1016 p->netpoll = NULL; 1017 1018 __netpoll_free_async(netpoll); 1019 } 1020 1021 static void dsa_slave_poll_controller(struct net_device *dev) 1022 { 1023 } 1024 #endif 1025 1026 static int dsa_slave_get_phys_port_name(struct net_device *dev, 1027 char *name, size_t len) 1028 { 1029 struct dsa_slave_priv *p = netdev_priv(dev); 1030 1031 if (snprintf(name, len, "p%d", p->dp->index) >= len) 1032 return -EINVAL; 1033 1034 return 0; 1035 } 1036 1037 static struct dsa_mall_tc_entry * 1038 dsa_slave_mall_tc_entry_find(struct dsa_slave_priv *p, 1039 unsigned long cookie) 1040 { 1041 struct dsa_mall_tc_entry *mall_tc_entry; 1042 1043 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 1044 if (mall_tc_entry->cookie == cookie) 1045 return mall_tc_entry; 1046 1047 return NULL; 1048 } 1049 1050 static int dsa_slave_add_cls_matchall(struct net_device *dev, 1051 __be16 protocol, 1052 struct tc_cls_matchall_offload *cls, 1053 bool ingress) 1054 { 1055 struct dsa_slave_priv *p = netdev_priv(dev); 1056 struct dsa_mall_tc_entry *mall_tc_entry; 1057 struct dsa_switch *ds = p->dp->ds; 1058 struct net *net = dev_net(dev); 1059 struct dsa_slave_priv *to_p; 1060 struct net_device *to_dev; 1061 const struct tc_action *a; 1062 int err = -EOPNOTSUPP; 1063 LIST_HEAD(actions); 1064 int ifindex; 1065 1066 if (!ds->ops->port_mirror_add) 1067 return err; 1068 1069 if (!tc_single_action(cls->exts)) 1070 return err; 1071 1072 tcf_exts_to_list(cls->exts, &actions); 1073 a = list_first_entry(&actions, struct tc_action, list); 1074 1075 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) { 1076 struct dsa_mall_mirror_tc_entry *mirror; 1077 1078 ifindex = tcf_mirred_ifindex(a); 1079 to_dev = __dev_get_by_index(net, ifindex); 1080 if (!to_dev) 1081 return -EINVAL; 1082 1083 if (!dsa_slave_dev_check(to_dev)) 1084 return -EOPNOTSUPP; 1085 1086 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 1087 if (!mall_tc_entry) 1088 return -ENOMEM; 1089 1090 mall_tc_entry->cookie = cls->cookie; 1091 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 1092 mirror = &mall_tc_entry->mirror; 1093 1094 to_p = netdev_priv(to_dev); 1095 1096 mirror->to_local_port = to_p->dp->index; 1097 mirror->ingress = ingress; 1098 1099 err = ds->ops->port_mirror_add(ds, p->dp->index, mirror, 1100 ingress); 1101 if (err) { 1102 kfree(mall_tc_entry); 1103 return err; 1104 } 1105 1106 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 1107 } 1108 1109 return 0; 1110 } 1111 1112 static void dsa_slave_del_cls_matchall(struct net_device *dev, 1113 struct tc_cls_matchall_offload *cls) 1114 { 1115 struct dsa_slave_priv *p = netdev_priv(dev); 1116 struct dsa_mall_tc_entry *mall_tc_entry; 1117 struct dsa_switch *ds = p->dp->ds; 1118 1119 if (!ds->ops->port_mirror_del) 1120 return; 1121 1122 mall_tc_entry = dsa_slave_mall_tc_entry_find(p, cls->cookie); 1123 if (!mall_tc_entry) 1124 return; 1125 1126 list_del(&mall_tc_entry->list); 1127 1128 switch (mall_tc_entry->type) { 1129 case DSA_PORT_MALL_MIRROR: 1130 ds->ops->port_mirror_del(ds, p->dp->index, 1131 &mall_tc_entry->mirror); 1132 break; 1133 default: 1134 WARN_ON(1); 1135 } 1136 1137 kfree(mall_tc_entry); 1138 } 1139 1140 static int dsa_slave_setup_tc(struct net_device *dev, u32 handle, 1141 __be16 protocol, struct tc_to_netdev *tc) 1142 { 1143 bool ingress = TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS); 1144 int ret = -EOPNOTSUPP; 1145 1146 switch (tc->type) { 1147 case TC_SETUP_MATCHALL: 1148 switch (tc->cls_mall->command) { 1149 case TC_CLSMATCHALL_REPLACE: 1150 return dsa_slave_add_cls_matchall(dev, protocol, 1151 tc->cls_mall, 1152 ingress); 1153 case TC_CLSMATCHALL_DESTROY: 1154 dsa_slave_del_cls_matchall(dev, tc->cls_mall); 1155 return 0; 1156 } 1157 default: 1158 break; 1159 } 1160 1161 return ret; 1162 } 1163 1164 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops) 1165 { 1166 ops->get_sset_count = dsa_cpu_port_get_sset_count; 1167 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats; 1168 ops->get_strings = dsa_cpu_port_get_strings; 1169 } 1170 1171 static int dsa_slave_get_rxnfc(struct net_device *dev, 1172 struct ethtool_rxnfc *nfc, u32 *rule_locs) 1173 { 1174 struct dsa_slave_priv *p = netdev_priv(dev); 1175 struct dsa_switch *ds = p->dp->ds; 1176 1177 if (!ds->ops->get_rxnfc) 1178 return -EOPNOTSUPP; 1179 1180 return ds->ops->get_rxnfc(ds, p->dp->index, nfc, rule_locs); 1181 } 1182 1183 static int dsa_slave_set_rxnfc(struct net_device *dev, 1184 struct ethtool_rxnfc *nfc) 1185 { 1186 struct dsa_slave_priv *p = netdev_priv(dev); 1187 struct dsa_switch *ds = p->dp->ds; 1188 1189 if (!ds->ops->set_rxnfc) 1190 return -EOPNOTSUPP; 1191 1192 return ds->ops->set_rxnfc(ds, p->dp->index, nfc); 1193 } 1194 1195 static const struct ethtool_ops dsa_slave_ethtool_ops = { 1196 .get_drvinfo = dsa_slave_get_drvinfo, 1197 .get_regs_len = dsa_slave_get_regs_len, 1198 .get_regs = dsa_slave_get_regs, 1199 .nway_reset = dsa_slave_nway_reset, 1200 .get_link = dsa_slave_get_link, 1201 .get_eeprom_len = dsa_slave_get_eeprom_len, 1202 .get_eeprom = dsa_slave_get_eeprom, 1203 .set_eeprom = dsa_slave_set_eeprom, 1204 .get_strings = dsa_slave_get_strings, 1205 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 1206 .get_sset_count = dsa_slave_get_sset_count, 1207 .set_wol = dsa_slave_set_wol, 1208 .get_wol = dsa_slave_get_wol, 1209 .set_eee = dsa_slave_set_eee, 1210 .get_eee = dsa_slave_get_eee, 1211 .get_link_ksettings = dsa_slave_get_link_ksettings, 1212 .set_link_ksettings = dsa_slave_set_link_ksettings, 1213 .get_rxnfc = dsa_slave_get_rxnfc, 1214 .set_rxnfc = dsa_slave_set_rxnfc, 1215 }; 1216 1217 static const struct net_device_ops dsa_slave_netdev_ops = { 1218 .ndo_open = dsa_slave_open, 1219 .ndo_stop = dsa_slave_close, 1220 .ndo_start_xmit = dsa_slave_xmit, 1221 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 1222 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 1223 .ndo_set_mac_address = dsa_slave_set_mac_address, 1224 .ndo_fdb_add = switchdev_port_fdb_add, 1225 .ndo_fdb_del = switchdev_port_fdb_del, 1226 .ndo_fdb_dump = switchdev_port_fdb_dump, 1227 .ndo_do_ioctl = dsa_slave_ioctl, 1228 .ndo_get_iflink = dsa_slave_get_iflink, 1229 #ifdef CONFIG_NET_POLL_CONTROLLER 1230 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 1231 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 1232 .ndo_poll_controller = dsa_slave_poll_controller, 1233 #endif 1234 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 1235 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 1236 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 1237 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 1238 .ndo_setup_tc = dsa_slave_setup_tc, 1239 }; 1240 1241 static const struct switchdev_ops dsa_slave_switchdev_ops = { 1242 .switchdev_port_attr_get = dsa_slave_port_attr_get, 1243 .switchdev_port_attr_set = dsa_slave_port_attr_set, 1244 .switchdev_port_obj_add = dsa_slave_port_obj_add, 1245 .switchdev_port_obj_del = dsa_slave_port_obj_del, 1246 .switchdev_port_obj_dump = dsa_slave_port_obj_dump, 1247 }; 1248 1249 static struct device_type dsa_type = { 1250 .name = "dsa", 1251 }; 1252 1253 static void dsa_slave_adjust_link(struct net_device *dev) 1254 { 1255 struct dsa_slave_priv *p = netdev_priv(dev); 1256 struct dsa_switch *ds = p->dp->ds; 1257 unsigned int status_changed = 0; 1258 1259 if (p->old_link != p->phy->link) { 1260 status_changed = 1; 1261 p->old_link = p->phy->link; 1262 } 1263 1264 if (p->old_duplex != p->phy->duplex) { 1265 status_changed = 1; 1266 p->old_duplex = p->phy->duplex; 1267 } 1268 1269 if (p->old_pause != p->phy->pause) { 1270 status_changed = 1; 1271 p->old_pause = p->phy->pause; 1272 } 1273 1274 if (ds->ops->adjust_link && status_changed) 1275 ds->ops->adjust_link(ds, p->dp->index, p->phy); 1276 1277 if (status_changed) 1278 phy_print_status(p->phy); 1279 } 1280 1281 static int dsa_slave_fixed_link_update(struct net_device *dev, 1282 struct fixed_phy_status *status) 1283 { 1284 struct dsa_slave_priv *p; 1285 struct dsa_switch *ds; 1286 1287 if (dev) { 1288 p = netdev_priv(dev); 1289 ds = p->dp->ds; 1290 if (ds->ops->fixed_link_update) 1291 ds->ops->fixed_link_update(ds, p->dp->index, status); 1292 } 1293 1294 return 0; 1295 } 1296 1297 /* slave device setup *******************************************************/ 1298 static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 1299 struct net_device *slave_dev, 1300 int addr) 1301 { 1302 struct dsa_switch *ds = p->dp->ds; 1303 1304 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr); 1305 if (!p->phy) { 1306 netdev_err(slave_dev, "no phy at %d\n", addr); 1307 return -ENODEV; 1308 } 1309 1310 /* Use already configured phy mode */ 1311 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1312 p->phy_interface = p->phy->interface; 1313 return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 1314 p->phy_interface); 1315 } 1316 1317 static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 1318 struct net_device *slave_dev) 1319 { 1320 struct dsa_switch *ds = p->dp->ds; 1321 struct device_node *phy_dn, *port_dn; 1322 bool phy_is_fixed = false; 1323 u32 phy_flags = 0; 1324 int mode, ret; 1325 1326 port_dn = p->dp->dn; 1327 mode = of_get_phy_mode(port_dn); 1328 if (mode < 0) 1329 mode = PHY_INTERFACE_MODE_NA; 1330 p->phy_interface = mode; 1331 1332 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1333 if (!phy_dn && of_phy_is_fixed_link(port_dn)) { 1334 /* In the case of a fixed PHY, the DT node associated 1335 * to the fixed PHY is the Port DT node 1336 */ 1337 ret = of_phy_register_fixed_link(port_dn); 1338 if (ret) { 1339 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1340 return ret; 1341 } 1342 phy_is_fixed = true; 1343 phy_dn = of_node_get(port_dn); 1344 } 1345 1346 if (ds->ops->get_phy_flags) 1347 phy_flags = ds->ops->get_phy_flags(ds, p->dp->index); 1348 1349 if (phy_dn) { 1350 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 1351 1352 /* If this PHY address is part of phys_mii_mask, which means 1353 * that we need to divert reads and writes to/from it, then we 1354 * want to bind this device using the slave MII bus created by 1355 * DSA to make that happen. 1356 */ 1357 if (!phy_is_fixed && phy_id >= 0 && 1358 (ds->phys_mii_mask & (1 << phy_id))) { 1359 ret = dsa_slave_phy_connect(p, slave_dev, phy_id); 1360 if (ret) { 1361 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); 1362 of_node_put(phy_dn); 1363 return ret; 1364 } 1365 } else { 1366 p->phy = of_phy_connect(slave_dev, phy_dn, 1367 dsa_slave_adjust_link, 1368 phy_flags, 1369 p->phy_interface); 1370 } 1371 1372 of_node_put(phy_dn); 1373 } 1374 1375 if (p->phy && phy_is_fixed) 1376 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 1377 1378 /* We could not connect to a designated PHY, so use the switch internal 1379 * MDIO bus instead 1380 */ 1381 if (!p->phy) { 1382 ret = dsa_slave_phy_connect(p, slave_dev, p->dp->index); 1383 if (ret) { 1384 netdev_err(slave_dev, "failed to connect to port %d: %d\n", 1385 p->dp->index, ret); 1386 if (phy_is_fixed) 1387 of_phy_deregister_fixed_link(port_dn); 1388 return ret; 1389 } 1390 } 1391 1392 phy_attached_info(p->phy); 1393 1394 return 0; 1395 } 1396 1397 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1398 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1399 struct netdev_queue *txq, 1400 void *_unused) 1401 { 1402 lockdep_set_class(&txq->_xmit_lock, 1403 &dsa_slave_netdev_xmit_lock_key); 1404 } 1405 1406 int dsa_slave_suspend(struct net_device *slave_dev) 1407 { 1408 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1409 1410 netif_device_detach(slave_dev); 1411 1412 if (p->phy) { 1413 phy_stop(p->phy); 1414 p->old_pause = -1; 1415 p->old_link = -1; 1416 p->old_duplex = -1; 1417 phy_suspend(p->phy); 1418 } 1419 1420 return 0; 1421 } 1422 1423 int dsa_slave_resume(struct net_device *slave_dev) 1424 { 1425 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1426 1427 netif_device_attach(slave_dev); 1428 1429 if (p->phy) { 1430 phy_resume(p->phy); 1431 phy_start(p->phy); 1432 } 1433 1434 return 0; 1435 } 1436 1437 int dsa_slave_create(struct dsa_switch *ds, struct device *parent, 1438 int port, const char *name) 1439 { 1440 struct dsa_switch_tree *dst = ds->dst; 1441 struct net_device *master; 1442 struct net_device *slave_dev; 1443 struct dsa_slave_priv *p; 1444 int ret; 1445 1446 master = ds->dst->master_netdev; 1447 if (ds->master_netdev) 1448 master = ds->master_netdev; 1449 1450 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, 1451 NET_NAME_UNKNOWN, ether_setup); 1452 if (slave_dev == NULL) 1453 return -ENOMEM; 1454 1455 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1456 slave_dev->hw_features |= NETIF_F_HW_TC; 1457 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1458 eth_hw_addr_inherit(slave_dev, master); 1459 slave_dev->priv_flags |= IFF_NO_QUEUE; 1460 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1461 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1462 slave_dev->min_mtu = 0; 1463 slave_dev->max_mtu = ETH_MAX_MTU; 1464 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1465 1466 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1467 NULL); 1468 1469 SET_NETDEV_DEV(slave_dev, parent); 1470 slave_dev->dev.of_node = ds->ports[port].dn; 1471 slave_dev->vlan_features = master->vlan_features; 1472 1473 p = netdev_priv(slave_dev); 1474 p->dp = &ds->ports[port]; 1475 INIT_LIST_HEAD(&p->mall_tc_list); 1476 p->xmit = dst->tag_ops->xmit; 1477 1478 p->old_pause = -1; 1479 p->old_link = -1; 1480 p->old_duplex = -1; 1481 1482 ds->ports[port].netdev = slave_dev; 1483 ret = register_netdev(slave_dev); 1484 if (ret) { 1485 netdev_err(master, "error %d registering interface %s\n", 1486 ret, slave_dev->name); 1487 ds->ports[port].netdev = NULL; 1488 free_netdev(slave_dev); 1489 return ret; 1490 } 1491 1492 netif_carrier_off(slave_dev); 1493 1494 ret = dsa_slave_phy_setup(p, slave_dev); 1495 if (ret) { 1496 netdev_err(master, "error %d setting up slave phy\n", ret); 1497 unregister_netdev(slave_dev); 1498 free_netdev(slave_dev); 1499 return ret; 1500 } 1501 1502 return 0; 1503 } 1504 1505 void dsa_slave_destroy(struct net_device *slave_dev) 1506 { 1507 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1508 struct device_node *port_dn; 1509 1510 port_dn = p->dp->dn; 1511 1512 netif_carrier_off(slave_dev); 1513 if (p->phy) { 1514 phy_disconnect(p->phy); 1515 1516 if (of_phy_is_fixed_link(port_dn)) 1517 of_phy_deregister_fixed_link(port_dn); 1518 } 1519 unregister_netdev(slave_dev); 1520 free_netdev(slave_dev); 1521 } 1522 1523 static bool dsa_slave_dev_check(struct net_device *dev) 1524 { 1525 return dev->netdev_ops == &dsa_slave_netdev_ops; 1526 } 1527 1528 static int dsa_slave_changeupper(struct net_device *dev, 1529 struct netdev_notifier_changeupper_info *info) 1530 { 1531 int err = NOTIFY_DONE; 1532 1533 if (netif_is_bridge_master(info->upper_dev)) { 1534 if (info->linking) { 1535 err = dsa_slave_bridge_port_join(dev, info->upper_dev); 1536 err = notifier_from_errno(err); 1537 } else { 1538 dsa_slave_bridge_port_leave(dev, info->upper_dev); 1539 err = NOTIFY_OK; 1540 } 1541 } 1542 1543 return err; 1544 } 1545 1546 static int dsa_slave_netdevice_event(struct notifier_block *nb, 1547 unsigned long event, void *ptr) 1548 { 1549 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1550 1551 if (dev->netdev_ops != &dsa_slave_netdev_ops) 1552 return NOTIFY_DONE; 1553 1554 if (event == NETDEV_CHANGEUPPER) 1555 return dsa_slave_changeupper(dev, ptr); 1556 1557 return NOTIFY_DONE; 1558 } 1559 1560 static struct notifier_block dsa_slave_nb __read_mostly = { 1561 .notifier_call = dsa_slave_netdevice_event, 1562 }; 1563 1564 int dsa_slave_register_notifier(void) 1565 { 1566 return register_netdevice_notifier(&dsa_slave_nb); 1567 } 1568 1569 void dsa_slave_unregister_notifier(void) 1570 { 1571 int err; 1572 1573 err = unregister_netdevice_notifier(&dsa_slave_nb); 1574 if (err) 1575 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 1576 } 1577