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