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 <net/rtnetlink.h> 20 #include <net/switchdev.h> 21 #include <linux/if_bridge.h> 22 #include <linux/netpoll.h> 23 #include "dsa_priv.h" 24 25 /* slave mii_bus handling ***************************************************/ 26 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 27 { 28 struct dsa_switch *ds = bus->priv; 29 30 if (ds->phys_mii_mask & (1 << addr)) 31 return ds->ops->phy_read(ds, addr, reg); 32 33 return 0xffff; 34 } 35 36 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 37 { 38 struct dsa_switch *ds = bus->priv; 39 40 if (ds->phys_mii_mask & (1 << addr)) 41 return ds->ops->phy_write(ds, addr, reg, val); 42 43 return 0; 44 } 45 46 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 47 { 48 ds->slave_mii_bus->priv = (void *)ds; 49 ds->slave_mii_bus->name = "dsa slave smi"; 50 ds->slave_mii_bus->read = dsa_slave_phy_read; 51 ds->slave_mii_bus->write = dsa_slave_phy_write; 52 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 53 ds->dst->tree, ds->index); 54 ds->slave_mii_bus->parent = ds->dev; 55 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 56 } 57 58 59 /* slave device handling ****************************************************/ 60 static int dsa_slave_get_iflink(const struct net_device *dev) 61 { 62 struct dsa_slave_priv *p = netdev_priv(dev); 63 64 return p->parent->dst->master_netdev->ifindex; 65 } 66 67 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p) 68 { 69 return !!p->bridge_dev; 70 } 71 72 static void dsa_port_set_stp_state(struct dsa_switch *ds, int port, u8 state) 73 { 74 struct dsa_port *dp = &ds->ports[port]; 75 76 if (ds->ops->port_stp_state_set) 77 ds->ops->port_stp_state_set(ds, port, state); 78 79 if (ds->ops->port_fast_age) { 80 /* Fast age FDB entries or flush appropriate forwarding database 81 * for the given port, if we are moving it from Learning or 82 * Forwarding state, to Disabled or Blocking or Listening state. 83 */ 84 85 if ((dp->stp_state == BR_STATE_LEARNING || 86 dp->stp_state == BR_STATE_FORWARDING) && 87 (state == BR_STATE_DISABLED || 88 state == BR_STATE_BLOCKING || 89 state == BR_STATE_LISTENING)) 90 ds->ops->port_fast_age(ds, port); 91 } 92 93 dp->stp_state = state; 94 } 95 96 static int dsa_slave_open(struct net_device *dev) 97 { 98 struct dsa_slave_priv *p = netdev_priv(dev); 99 struct net_device *master = p->parent->dst->master_netdev; 100 struct dsa_switch *ds = p->parent; 101 u8 stp_state = dsa_port_is_bridged(p) ? 102 BR_STATE_BLOCKING : BR_STATE_FORWARDING; 103 int err; 104 105 if (!(master->flags & IFF_UP)) 106 return -ENETDOWN; 107 108 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 109 err = dev_uc_add(master, dev->dev_addr); 110 if (err < 0) 111 goto out; 112 } 113 114 if (dev->flags & IFF_ALLMULTI) { 115 err = dev_set_allmulti(master, 1); 116 if (err < 0) 117 goto del_unicast; 118 } 119 if (dev->flags & IFF_PROMISC) { 120 err = dev_set_promiscuity(master, 1); 121 if (err < 0) 122 goto clear_allmulti; 123 } 124 125 if (ds->ops->port_enable) { 126 err = ds->ops->port_enable(ds, p->port, p->phy); 127 if (err) 128 goto clear_promisc; 129 } 130 131 dsa_port_set_stp_state(ds, p->port, stp_state); 132 133 if (p->phy) 134 phy_start(p->phy); 135 136 return 0; 137 138 clear_promisc: 139 if (dev->flags & IFF_PROMISC) 140 dev_set_promiscuity(master, -1); 141 clear_allmulti: 142 if (dev->flags & IFF_ALLMULTI) 143 dev_set_allmulti(master, -1); 144 del_unicast: 145 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 146 dev_uc_del(master, dev->dev_addr); 147 out: 148 return err; 149 } 150 151 static int dsa_slave_close(struct net_device *dev) 152 { 153 struct dsa_slave_priv *p = netdev_priv(dev); 154 struct net_device *master = p->parent->dst->master_netdev; 155 struct dsa_switch *ds = p->parent; 156 157 if (p->phy) 158 phy_stop(p->phy); 159 160 dev_mc_unsync(master, dev); 161 dev_uc_unsync(master, dev); 162 if (dev->flags & IFF_ALLMULTI) 163 dev_set_allmulti(master, -1); 164 if (dev->flags & IFF_PROMISC) 165 dev_set_promiscuity(master, -1); 166 167 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 168 dev_uc_del(master, dev->dev_addr); 169 170 if (ds->ops->port_disable) 171 ds->ops->port_disable(ds, p->port, p->phy); 172 173 dsa_port_set_stp_state(ds, p->port, BR_STATE_DISABLED); 174 175 return 0; 176 } 177 178 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 179 { 180 struct dsa_slave_priv *p = netdev_priv(dev); 181 struct net_device *master = p->parent->dst->master_netdev; 182 183 if (change & IFF_ALLMULTI) 184 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); 185 if (change & IFF_PROMISC) 186 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); 187 } 188 189 static void dsa_slave_set_rx_mode(struct net_device *dev) 190 { 191 struct dsa_slave_priv *p = netdev_priv(dev); 192 struct net_device *master = p->parent->dst->master_netdev; 193 194 dev_mc_sync(master, dev); 195 dev_uc_sync(master, dev); 196 } 197 198 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 199 { 200 struct dsa_slave_priv *p = netdev_priv(dev); 201 struct net_device *master = p->parent->dst->master_netdev; 202 struct sockaddr *addr = a; 203 int err; 204 205 if (!is_valid_ether_addr(addr->sa_data)) 206 return -EADDRNOTAVAIL; 207 208 if (!(dev->flags & IFF_UP)) 209 goto out; 210 211 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 212 err = dev_uc_add(master, addr->sa_data); 213 if (err < 0) 214 return err; 215 } 216 217 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 218 dev_uc_del(master, dev->dev_addr); 219 220 out: 221 ether_addr_copy(dev->dev_addr, addr->sa_data); 222 223 return 0; 224 } 225 226 static int dsa_slave_port_vlan_add(struct net_device *dev, 227 const struct switchdev_obj_port_vlan *vlan, 228 struct switchdev_trans *trans) 229 { 230 struct dsa_slave_priv *p = netdev_priv(dev); 231 struct dsa_switch *ds = p->parent; 232 233 if (switchdev_trans_ph_prepare(trans)) { 234 if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add) 235 return -EOPNOTSUPP; 236 237 return ds->ops->port_vlan_prepare(ds, p->port, vlan, trans); 238 } 239 240 ds->ops->port_vlan_add(ds, p->port, vlan, trans); 241 242 return 0; 243 } 244 245 static int dsa_slave_port_vlan_del(struct net_device *dev, 246 const struct switchdev_obj_port_vlan *vlan) 247 { 248 struct dsa_slave_priv *p = netdev_priv(dev); 249 struct dsa_switch *ds = p->parent; 250 251 if (!ds->ops->port_vlan_del) 252 return -EOPNOTSUPP; 253 254 return ds->ops->port_vlan_del(ds, p->port, vlan); 255 } 256 257 static int dsa_slave_port_vlan_dump(struct net_device *dev, 258 struct switchdev_obj_port_vlan *vlan, 259 switchdev_obj_dump_cb_t *cb) 260 { 261 struct dsa_slave_priv *p = netdev_priv(dev); 262 struct dsa_switch *ds = p->parent; 263 264 if (ds->ops->port_vlan_dump) 265 return ds->ops->port_vlan_dump(ds, p->port, vlan, cb); 266 267 return -EOPNOTSUPP; 268 } 269 270 static int dsa_slave_port_fdb_add(struct net_device *dev, 271 const struct switchdev_obj_port_fdb *fdb, 272 struct switchdev_trans *trans) 273 { 274 struct dsa_slave_priv *p = netdev_priv(dev); 275 struct dsa_switch *ds = p->parent; 276 277 if (switchdev_trans_ph_prepare(trans)) { 278 if (!ds->ops->port_fdb_prepare || !ds->ops->port_fdb_add) 279 return -EOPNOTSUPP; 280 281 return ds->ops->port_fdb_prepare(ds, p->port, fdb, trans); 282 } 283 284 ds->ops->port_fdb_add(ds, p->port, fdb, trans); 285 286 return 0; 287 } 288 289 static int dsa_slave_port_fdb_del(struct net_device *dev, 290 const struct switchdev_obj_port_fdb *fdb) 291 { 292 struct dsa_slave_priv *p = netdev_priv(dev); 293 struct dsa_switch *ds = p->parent; 294 int ret = -EOPNOTSUPP; 295 296 if (ds->ops->port_fdb_del) 297 ret = ds->ops->port_fdb_del(ds, p->port, fdb); 298 299 return ret; 300 } 301 302 static int dsa_slave_port_fdb_dump(struct net_device *dev, 303 struct switchdev_obj_port_fdb *fdb, 304 switchdev_obj_dump_cb_t *cb) 305 { 306 struct dsa_slave_priv *p = netdev_priv(dev); 307 struct dsa_switch *ds = p->parent; 308 309 if (ds->ops->port_fdb_dump) 310 return ds->ops->port_fdb_dump(ds, p->port, fdb, cb); 311 312 return -EOPNOTSUPP; 313 } 314 315 static int dsa_slave_port_mdb_add(struct net_device *dev, 316 const struct switchdev_obj_port_mdb *mdb, 317 struct switchdev_trans *trans) 318 { 319 struct dsa_slave_priv *p = netdev_priv(dev); 320 struct dsa_switch *ds = p->parent; 321 322 if (switchdev_trans_ph_prepare(trans)) { 323 if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add) 324 return -EOPNOTSUPP; 325 326 return ds->ops->port_mdb_prepare(ds, p->port, mdb, trans); 327 } 328 329 ds->ops->port_mdb_add(ds, p->port, mdb, trans); 330 331 return 0; 332 } 333 334 static int dsa_slave_port_mdb_del(struct net_device *dev, 335 const struct switchdev_obj_port_mdb *mdb) 336 { 337 struct dsa_slave_priv *p = netdev_priv(dev); 338 struct dsa_switch *ds = p->parent; 339 340 if (ds->ops->port_mdb_del) 341 return ds->ops->port_mdb_del(ds, p->port, mdb); 342 343 return -EOPNOTSUPP; 344 } 345 346 static int dsa_slave_port_mdb_dump(struct net_device *dev, 347 struct switchdev_obj_port_mdb *mdb, 348 switchdev_obj_dump_cb_t *cb) 349 { 350 struct dsa_slave_priv *p = netdev_priv(dev); 351 struct dsa_switch *ds = p->parent; 352 353 if (ds->ops->port_mdb_dump) 354 return ds->ops->port_mdb_dump(ds, p->port, mdb, cb); 355 356 return -EOPNOTSUPP; 357 } 358 359 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 360 { 361 struct dsa_slave_priv *p = netdev_priv(dev); 362 363 if (p->phy != NULL) 364 return phy_mii_ioctl(p->phy, ifr, cmd); 365 366 return -EOPNOTSUPP; 367 } 368 369 static int dsa_slave_stp_state_set(struct net_device *dev, 370 const struct switchdev_attr *attr, 371 struct switchdev_trans *trans) 372 { 373 struct dsa_slave_priv *p = netdev_priv(dev); 374 struct dsa_switch *ds = p->parent; 375 376 if (switchdev_trans_ph_prepare(trans)) 377 return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP; 378 379 dsa_port_set_stp_state(ds, p->port, attr->u.stp_state); 380 381 return 0; 382 } 383 384 static int dsa_slave_vlan_filtering(struct net_device *dev, 385 const struct switchdev_attr *attr, 386 struct switchdev_trans *trans) 387 { 388 struct dsa_slave_priv *p = netdev_priv(dev); 389 struct dsa_switch *ds = p->parent; 390 391 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */ 392 if (switchdev_trans_ph_prepare(trans)) 393 return 0; 394 395 if (ds->ops->port_vlan_filtering) 396 return ds->ops->port_vlan_filtering(ds, p->port, 397 attr->u.vlan_filtering); 398 399 return 0; 400 } 401 402 static int dsa_fastest_ageing_time(struct dsa_switch *ds, 403 unsigned int ageing_time) 404 { 405 int i; 406 407 for (i = 0; i < DSA_MAX_PORTS; ++i) { 408 struct dsa_port *dp = &ds->ports[i]; 409 410 if (dp && dp->ageing_time && dp->ageing_time < ageing_time) 411 ageing_time = dp->ageing_time; 412 } 413 414 return ageing_time; 415 } 416 417 static int dsa_slave_ageing_time(struct net_device *dev, 418 const struct switchdev_attr *attr, 419 struct switchdev_trans *trans) 420 { 421 struct dsa_slave_priv *p = netdev_priv(dev); 422 struct dsa_switch *ds = p->parent; 423 unsigned long ageing_jiffies = clock_t_to_jiffies(attr->u.ageing_time); 424 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies); 425 426 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */ 427 if (switchdev_trans_ph_prepare(trans)) 428 return 0; 429 430 /* Keep the fastest ageing time in case of multiple bridges */ 431 ds->ports[p->port].ageing_time = ageing_time; 432 ageing_time = dsa_fastest_ageing_time(ds, ageing_time); 433 434 if (ds->ops->set_ageing_time) 435 return ds->ops->set_ageing_time(ds, ageing_time); 436 437 return 0; 438 } 439 440 static int dsa_slave_port_attr_set(struct net_device *dev, 441 const struct switchdev_attr *attr, 442 struct switchdev_trans *trans) 443 { 444 int ret; 445 446 switch (attr->id) { 447 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 448 ret = dsa_slave_stp_state_set(dev, attr, trans); 449 break; 450 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 451 ret = dsa_slave_vlan_filtering(dev, attr, trans); 452 break; 453 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 454 ret = dsa_slave_ageing_time(dev, attr, trans); 455 break; 456 default: 457 ret = -EOPNOTSUPP; 458 break; 459 } 460 461 return ret; 462 } 463 464 static int dsa_slave_port_obj_add(struct net_device *dev, 465 const struct switchdev_obj *obj, 466 struct switchdev_trans *trans) 467 { 468 int err; 469 470 /* For the prepare phase, ensure the full set of changes is feasable in 471 * one go in order to signal a failure properly. If an operation is not 472 * supported, return -EOPNOTSUPP. 473 */ 474 475 switch (obj->id) { 476 case SWITCHDEV_OBJ_ID_PORT_FDB: 477 err = dsa_slave_port_fdb_add(dev, 478 SWITCHDEV_OBJ_PORT_FDB(obj), 479 trans); 480 break; 481 case SWITCHDEV_OBJ_ID_PORT_MDB: 482 err = dsa_slave_port_mdb_add(dev, SWITCHDEV_OBJ_PORT_MDB(obj), 483 trans); 484 break; 485 case SWITCHDEV_OBJ_ID_PORT_VLAN: 486 err = dsa_slave_port_vlan_add(dev, 487 SWITCHDEV_OBJ_PORT_VLAN(obj), 488 trans); 489 break; 490 default: 491 err = -EOPNOTSUPP; 492 break; 493 } 494 495 return err; 496 } 497 498 static int dsa_slave_port_obj_del(struct net_device *dev, 499 const struct switchdev_obj *obj) 500 { 501 int err; 502 503 switch (obj->id) { 504 case SWITCHDEV_OBJ_ID_PORT_FDB: 505 err = dsa_slave_port_fdb_del(dev, 506 SWITCHDEV_OBJ_PORT_FDB(obj)); 507 break; 508 case SWITCHDEV_OBJ_ID_PORT_MDB: 509 err = dsa_slave_port_mdb_del(dev, SWITCHDEV_OBJ_PORT_MDB(obj)); 510 break; 511 case SWITCHDEV_OBJ_ID_PORT_VLAN: 512 err = dsa_slave_port_vlan_del(dev, 513 SWITCHDEV_OBJ_PORT_VLAN(obj)); 514 break; 515 default: 516 err = -EOPNOTSUPP; 517 break; 518 } 519 520 return err; 521 } 522 523 static int dsa_slave_port_obj_dump(struct net_device *dev, 524 struct switchdev_obj *obj, 525 switchdev_obj_dump_cb_t *cb) 526 { 527 int err; 528 529 switch (obj->id) { 530 case SWITCHDEV_OBJ_ID_PORT_FDB: 531 err = dsa_slave_port_fdb_dump(dev, 532 SWITCHDEV_OBJ_PORT_FDB(obj), 533 cb); 534 break; 535 case SWITCHDEV_OBJ_ID_PORT_MDB: 536 err = dsa_slave_port_mdb_dump(dev, SWITCHDEV_OBJ_PORT_MDB(obj), 537 cb); 538 break; 539 case SWITCHDEV_OBJ_ID_PORT_VLAN: 540 err = dsa_slave_port_vlan_dump(dev, 541 SWITCHDEV_OBJ_PORT_VLAN(obj), 542 cb); 543 break; 544 default: 545 err = -EOPNOTSUPP; 546 break; 547 } 548 549 return err; 550 } 551 552 static int dsa_slave_bridge_port_join(struct net_device *dev, 553 struct net_device *br) 554 { 555 struct dsa_slave_priv *p = netdev_priv(dev); 556 struct dsa_switch *ds = p->parent; 557 int ret = -EOPNOTSUPP; 558 559 p->bridge_dev = br; 560 561 if (ds->ops->port_bridge_join) 562 ret = ds->ops->port_bridge_join(ds, p->port, br); 563 564 return ret == -EOPNOTSUPP ? 0 : ret; 565 } 566 567 static void dsa_slave_bridge_port_leave(struct net_device *dev) 568 { 569 struct dsa_slave_priv *p = netdev_priv(dev); 570 struct dsa_switch *ds = p->parent; 571 572 573 if (ds->ops->port_bridge_leave) 574 ds->ops->port_bridge_leave(ds, p->port); 575 576 p->bridge_dev = NULL; 577 578 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 579 * so allow it to be in BR_STATE_FORWARDING to be kept functional 580 */ 581 dsa_port_set_stp_state(ds, p->port, BR_STATE_FORWARDING); 582 } 583 584 static int dsa_slave_port_attr_get(struct net_device *dev, 585 struct switchdev_attr *attr) 586 { 587 struct dsa_slave_priv *p = netdev_priv(dev); 588 struct dsa_switch *ds = p->parent; 589 590 switch (attr->id) { 591 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: 592 attr->u.ppid.id_len = sizeof(ds->index); 593 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len); 594 break; 595 default: 596 return -EOPNOTSUPP; 597 } 598 599 return 0; 600 } 601 602 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p, 603 struct sk_buff *skb) 604 { 605 #ifdef CONFIG_NET_POLL_CONTROLLER 606 if (p->netpoll) 607 netpoll_send_skb(p->netpoll, skb); 608 #else 609 BUG(); 610 #endif 611 return NETDEV_TX_OK; 612 } 613 614 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 615 { 616 struct dsa_slave_priv *p = netdev_priv(dev); 617 struct sk_buff *nskb; 618 619 dev->stats.tx_packets++; 620 dev->stats.tx_bytes += skb->len; 621 622 /* Transmit function may have to reallocate the original SKB */ 623 nskb = p->xmit(skb, dev); 624 if (!nskb) 625 return NETDEV_TX_OK; 626 627 /* SKB for netpoll still need to be mangled with the protocol-specific 628 * tag to be successfully transmitted 629 */ 630 if (unlikely(netpoll_tx_running(dev))) 631 return dsa_netpoll_send_skb(p, nskb); 632 633 /* Queue the SKB for transmission on the parent interface, but 634 * do not modify its EtherType 635 */ 636 nskb->dev = p->parent->dst->master_netdev; 637 dev_queue_xmit(nskb); 638 639 return NETDEV_TX_OK; 640 } 641 642 /* ethtool operations *******************************************************/ 643 static int 644 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 645 { 646 struct dsa_slave_priv *p = netdev_priv(dev); 647 int err; 648 649 err = -EOPNOTSUPP; 650 if (p->phy != NULL) { 651 err = phy_read_status(p->phy); 652 if (err == 0) 653 err = phy_ethtool_gset(p->phy, cmd); 654 } 655 656 return err; 657 } 658 659 static int 660 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 661 { 662 struct dsa_slave_priv *p = netdev_priv(dev); 663 664 if (p->phy != NULL) 665 return phy_ethtool_sset(p->phy, cmd); 666 667 return -EOPNOTSUPP; 668 } 669 670 static void dsa_slave_get_drvinfo(struct net_device *dev, 671 struct ethtool_drvinfo *drvinfo) 672 { 673 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 674 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version)); 675 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 676 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 677 } 678 679 static int dsa_slave_get_regs_len(struct net_device *dev) 680 { 681 struct dsa_slave_priv *p = netdev_priv(dev); 682 struct dsa_switch *ds = p->parent; 683 684 if (ds->ops->get_regs_len) 685 return ds->ops->get_regs_len(ds, p->port); 686 687 return -EOPNOTSUPP; 688 } 689 690 static void 691 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 692 { 693 struct dsa_slave_priv *p = netdev_priv(dev); 694 struct dsa_switch *ds = p->parent; 695 696 if (ds->ops->get_regs) 697 ds->ops->get_regs(ds, p->port, regs, _p); 698 } 699 700 static int dsa_slave_nway_reset(struct net_device *dev) 701 { 702 struct dsa_slave_priv *p = netdev_priv(dev); 703 704 if (p->phy != NULL) 705 return genphy_restart_aneg(p->phy); 706 707 return -EOPNOTSUPP; 708 } 709 710 static u32 dsa_slave_get_link(struct net_device *dev) 711 { 712 struct dsa_slave_priv *p = netdev_priv(dev); 713 714 if (p->phy != NULL) { 715 genphy_update_link(p->phy); 716 return p->phy->link; 717 } 718 719 return -EOPNOTSUPP; 720 } 721 722 static int dsa_slave_get_eeprom_len(struct net_device *dev) 723 { 724 struct dsa_slave_priv *p = netdev_priv(dev); 725 struct dsa_switch *ds = p->parent; 726 727 if (ds->cd && ds->cd->eeprom_len) 728 return ds->cd->eeprom_len; 729 730 if (ds->ops->get_eeprom_len) 731 return ds->ops->get_eeprom_len(ds); 732 733 return 0; 734 } 735 736 static int dsa_slave_get_eeprom(struct net_device *dev, 737 struct ethtool_eeprom *eeprom, u8 *data) 738 { 739 struct dsa_slave_priv *p = netdev_priv(dev); 740 struct dsa_switch *ds = p->parent; 741 742 if (ds->ops->get_eeprom) 743 return ds->ops->get_eeprom(ds, eeprom, data); 744 745 return -EOPNOTSUPP; 746 } 747 748 static int dsa_slave_set_eeprom(struct net_device *dev, 749 struct ethtool_eeprom *eeprom, u8 *data) 750 { 751 struct dsa_slave_priv *p = netdev_priv(dev); 752 struct dsa_switch *ds = p->parent; 753 754 if (ds->ops->set_eeprom) 755 return ds->ops->set_eeprom(ds, eeprom, data); 756 757 return -EOPNOTSUPP; 758 } 759 760 static void dsa_slave_get_strings(struct net_device *dev, 761 uint32_t stringset, uint8_t *data) 762 { 763 struct dsa_slave_priv *p = netdev_priv(dev); 764 struct dsa_switch *ds = p->parent; 765 766 if (stringset == ETH_SS_STATS) { 767 int len = ETH_GSTRING_LEN; 768 769 strncpy(data, "tx_packets", len); 770 strncpy(data + len, "tx_bytes", len); 771 strncpy(data + 2 * len, "rx_packets", len); 772 strncpy(data + 3 * len, "rx_bytes", len); 773 if (ds->ops->get_strings) 774 ds->ops->get_strings(ds, p->port, data + 4 * len); 775 } 776 } 777 778 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev, 779 struct ethtool_stats *stats, 780 uint64_t *data) 781 { 782 struct dsa_switch_tree *dst = dev->dsa_ptr; 783 struct dsa_switch *ds = dst->ds[0]; 784 s8 cpu_port = dst->cpu_port; 785 int count = 0; 786 787 if (dst->master_ethtool_ops.get_sset_count) { 788 count = dst->master_ethtool_ops.get_sset_count(dev, 789 ETH_SS_STATS); 790 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data); 791 } 792 793 if (ds->ops->get_ethtool_stats) 794 ds->ops->get_ethtool_stats(ds, cpu_port, data + count); 795 } 796 797 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset) 798 { 799 struct dsa_switch_tree *dst = dev->dsa_ptr; 800 struct dsa_switch *ds = dst->ds[0]; 801 int count = 0; 802 803 if (dst->master_ethtool_ops.get_sset_count) 804 count += dst->master_ethtool_ops.get_sset_count(dev, sset); 805 806 if (sset == ETH_SS_STATS && ds->ops->get_sset_count) 807 count += ds->ops->get_sset_count(ds); 808 809 return count; 810 } 811 812 static void dsa_cpu_port_get_strings(struct net_device *dev, 813 uint32_t stringset, uint8_t *data) 814 { 815 struct dsa_switch_tree *dst = dev->dsa_ptr; 816 struct dsa_switch *ds = dst->ds[0]; 817 s8 cpu_port = dst->cpu_port; 818 int len = ETH_GSTRING_LEN; 819 int mcount = 0, count; 820 unsigned int i; 821 uint8_t pfx[4]; 822 uint8_t *ndata; 823 824 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port); 825 /* We do not want to be NULL-terminated, since this is a prefix */ 826 pfx[sizeof(pfx) - 1] = '_'; 827 828 if (dst->master_ethtool_ops.get_sset_count) { 829 mcount = dst->master_ethtool_ops.get_sset_count(dev, 830 ETH_SS_STATS); 831 dst->master_ethtool_ops.get_strings(dev, stringset, data); 832 } 833 834 if (stringset == ETH_SS_STATS && ds->ops->get_strings) { 835 ndata = data + mcount * len; 836 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle 837 * the output after to prepend our CPU port prefix we 838 * constructed earlier 839 */ 840 ds->ops->get_strings(ds, cpu_port, ndata); 841 count = ds->ops->get_sset_count(ds); 842 for (i = 0; i < count; i++) { 843 memmove(ndata + (i * len + sizeof(pfx)), 844 ndata + i * len, len - sizeof(pfx)); 845 memcpy(ndata + i * len, pfx, sizeof(pfx)); 846 } 847 } 848 } 849 850 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 851 struct ethtool_stats *stats, 852 uint64_t *data) 853 { 854 struct dsa_slave_priv *p = netdev_priv(dev); 855 struct dsa_switch *ds = p->parent; 856 857 data[0] = dev->stats.tx_packets; 858 data[1] = dev->stats.tx_bytes; 859 data[2] = dev->stats.rx_packets; 860 data[3] = dev->stats.rx_bytes; 861 if (ds->ops->get_ethtool_stats) 862 ds->ops->get_ethtool_stats(ds, p->port, data + 4); 863 } 864 865 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 866 { 867 struct dsa_slave_priv *p = netdev_priv(dev); 868 struct dsa_switch *ds = p->parent; 869 870 if (sset == ETH_SS_STATS) { 871 int count; 872 873 count = 4; 874 if (ds->ops->get_sset_count) 875 count += ds->ops->get_sset_count(ds); 876 877 return count; 878 } 879 880 return -EOPNOTSUPP; 881 } 882 883 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 884 { 885 struct dsa_slave_priv *p = netdev_priv(dev); 886 struct dsa_switch *ds = p->parent; 887 888 if (ds->ops->get_wol) 889 ds->ops->get_wol(ds, p->port, w); 890 } 891 892 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 893 { 894 struct dsa_slave_priv *p = netdev_priv(dev); 895 struct dsa_switch *ds = p->parent; 896 int ret = -EOPNOTSUPP; 897 898 if (ds->ops->set_wol) 899 ret = ds->ops->set_wol(ds, p->port, w); 900 901 return ret; 902 } 903 904 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 905 { 906 struct dsa_slave_priv *p = netdev_priv(dev); 907 struct dsa_switch *ds = p->parent; 908 int ret; 909 910 if (!ds->ops->set_eee) 911 return -EOPNOTSUPP; 912 913 ret = ds->ops->set_eee(ds, p->port, p->phy, e); 914 if (ret) 915 return ret; 916 917 if (p->phy) 918 ret = phy_ethtool_set_eee(p->phy, e); 919 920 return ret; 921 } 922 923 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 924 { 925 struct dsa_slave_priv *p = netdev_priv(dev); 926 struct dsa_switch *ds = p->parent; 927 int ret; 928 929 if (!ds->ops->get_eee) 930 return -EOPNOTSUPP; 931 932 ret = ds->ops->get_eee(ds, p->port, e); 933 if (ret) 934 return ret; 935 936 if (p->phy) 937 ret = phy_ethtool_get_eee(p->phy, e); 938 939 return ret; 940 } 941 942 #ifdef CONFIG_NET_POLL_CONTROLLER 943 static int dsa_slave_netpoll_setup(struct net_device *dev, 944 struct netpoll_info *ni) 945 { 946 struct dsa_slave_priv *p = netdev_priv(dev); 947 struct dsa_switch *ds = p->parent; 948 struct net_device *master = ds->dst->master_netdev; 949 struct netpoll *netpoll; 950 int err = 0; 951 952 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 953 if (!netpoll) 954 return -ENOMEM; 955 956 err = __netpoll_setup(netpoll, master); 957 if (err) { 958 kfree(netpoll); 959 goto out; 960 } 961 962 p->netpoll = netpoll; 963 out: 964 return err; 965 } 966 967 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 968 { 969 struct dsa_slave_priv *p = netdev_priv(dev); 970 struct netpoll *netpoll = p->netpoll; 971 972 if (!netpoll) 973 return; 974 975 p->netpoll = NULL; 976 977 __netpoll_free_async(netpoll); 978 } 979 980 static void dsa_slave_poll_controller(struct net_device *dev) 981 { 982 } 983 #endif 984 985 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops) 986 { 987 ops->get_sset_count = dsa_cpu_port_get_sset_count; 988 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats; 989 ops->get_strings = dsa_cpu_port_get_strings; 990 } 991 992 static const struct ethtool_ops dsa_slave_ethtool_ops = { 993 .get_settings = dsa_slave_get_settings, 994 .set_settings = dsa_slave_set_settings, 995 .get_drvinfo = dsa_slave_get_drvinfo, 996 .get_regs_len = dsa_slave_get_regs_len, 997 .get_regs = dsa_slave_get_regs, 998 .nway_reset = dsa_slave_nway_reset, 999 .get_link = dsa_slave_get_link, 1000 .get_eeprom_len = dsa_slave_get_eeprom_len, 1001 .get_eeprom = dsa_slave_get_eeprom, 1002 .set_eeprom = dsa_slave_set_eeprom, 1003 .get_strings = dsa_slave_get_strings, 1004 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 1005 .get_sset_count = dsa_slave_get_sset_count, 1006 .set_wol = dsa_slave_set_wol, 1007 .get_wol = dsa_slave_get_wol, 1008 .set_eee = dsa_slave_set_eee, 1009 .get_eee = dsa_slave_get_eee, 1010 }; 1011 1012 static const struct net_device_ops dsa_slave_netdev_ops = { 1013 .ndo_open = dsa_slave_open, 1014 .ndo_stop = dsa_slave_close, 1015 .ndo_start_xmit = dsa_slave_xmit, 1016 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 1017 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 1018 .ndo_set_mac_address = dsa_slave_set_mac_address, 1019 .ndo_fdb_add = switchdev_port_fdb_add, 1020 .ndo_fdb_del = switchdev_port_fdb_del, 1021 .ndo_fdb_dump = switchdev_port_fdb_dump, 1022 .ndo_do_ioctl = dsa_slave_ioctl, 1023 .ndo_get_iflink = dsa_slave_get_iflink, 1024 #ifdef CONFIG_NET_POLL_CONTROLLER 1025 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 1026 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 1027 .ndo_poll_controller = dsa_slave_poll_controller, 1028 #endif 1029 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 1030 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 1031 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 1032 }; 1033 1034 static const struct switchdev_ops dsa_slave_switchdev_ops = { 1035 .switchdev_port_attr_get = dsa_slave_port_attr_get, 1036 .switchdev_port_attr_set = dsa_slave_port_attr_set, 1037 .switchdev_port_obj_add = dsa_slave_port_obj_add, 1038 .switchdev_port_obj_del = dsa_slave_port_obj_del, 1039 .switchdev_port_obj_dump = dsa_slave_port_obj_dump, 1040 }; 1041 1042 static struct device_type dsa_type = { 1043 .name = "dsa", 1044 }; 1045 1046 static void dsa_slave_adjust_link(struct net_device *dev) 1047 { 1048 struct dsa_slave_priv *p = netdev_priv(dev); 1049 struct dsa_switch *ds = p->parent; 1050 unsigned int status_changed = 0; 1051 1052 if (p->old_link != p->phy->link) { 1053 status_changed = 1; 1054 p->old_link = p->phy->link; 1055 } 1056 1057 if (p->old_duplex != p->phy->duplex) { 1058 status_changed = 1; 1059 p->old_duplex = p->phy->duplex; 1060 } 1061 1062 if (p->old_pause != p->phy->pause) { 1063 status_changed = 1; 1064 p->old_pause = p->phy->pause; 1065 } 1066 1067 if (ds->ops->adjust_link && status_changed) 1068 ds->ops->adjust_link(ds, p->port, p->phy); 1069 1070 if (status_changed) 1071 phy_print_status(p->phy); 1072 } 1073 1074 static int dsa_slave_fixed_link_update(struct net_device *dev, 1075 struct fixed_phy_status *status) 1076 { 1077 struct dsa_slave_priv *p; 1078 struct dsa_switch *ds; 1079 1080 if (dev) { 1081 p = netdev_priv(dev); 1082 ds = p->parent; 1083 if (ds->ops->fixed_link_update) 1084 ds->ops->fixed_link_update(ds, p->port, status); 1085 } 1086 1087 return 0; 1088 } 1089 1090 /* slave device setup *******************************************************/ 1091 static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 1092 struct net_device *slave_dev, 1093 int addr) 1094 { 1095 struct dsa_switch *ds = p->parent; 1096 1097 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr); 1098 if (!p->phy) { 1099 netdev_err(slave_dev, "no phy at %d\n", addr); 1100 return -ENODEV; 1101 } 1102 1103 /* Use already configured phy mode */ 1104 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1105 p->phy_interface = p->phy->interface; 1106 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 1107 p->phy_interface); 1108 1109 return 0; 1110 } 1111 1112 static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 1113 struct net_device *slave_dev) 1114 { 1115 struct dsa_switch *ds = p->parent; 1116 struct device_node *phy_dn, *port_dn; 1117 bool phy_is_fixed = false; 1118 u32 phy_flags = 0; 1119 int mode, ret; 1120 1121 port_dn = ds->ports[p->port].dn; 1122 mode = of_get_phy_mode(port_dn); 1123 if (mode < 0) 1124 mode = PHY_INTERFACE_MODE_NA; 1125 p->phy_interface = mode; 1126 1127 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1128 if (of_phy_is_fixed_link(port_dn)) { 1129 /* In the case of a fixed PHY, the DT node associated 1130 * to the fixed PHY is the Port DT node 1131 */ 1132 ret = of_phy_register_fixed_link(port_dn); 1133 if (ret) { 1134 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1135 return ret; 1136 } 1137 phy_is_fixed = true; 1138 phy_dn = port_dn; 1139 } 1140 1141 if (ds->ops->get_phy_flags) 1142 phy_flags = ds->ops->get_phy_flags(ds, p->port); 1143 1144 if (phy_dn) { 1145 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 1146 1147 /* If this PHY address is part of phys_mii_mask, which means 1148 * that we need to divert reads and writes to/from it, then we 1149 * want to bind this device using the slave MII bus created by 1150 * DSA to make that happen. 1151 */ 1152 if (!phy_is_fixed && phy_id >= 0 && 1153 (ds->phys_mii_mask & (1 << phy_id))) { 1154 ret = dsa_slave_phy_connect(p, slave_dev, phy_id); 1155 if (ret) { 1156 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); 1157 return ret; 1158 } 1159 } else { 1160 p->phy = of_phy_connect(slave_dev, phy_dn, 1161 dsa_slave_adjust_link, 1162 phy_flags, 1163 p->phy_interface); 1164 } 1165 } 1166 1167 if (p->phy && phy_is_fixed) 1168 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 1169 1170 /* We could not connect to a designated PHY, so use the switch internal 1171 * MDIO bus instead 1172 */ 1173 if (!p->phy) { 1174 ret = dsa_slave_phy_connect(p, slave_dev, p->port); 1175 if (ret) { 1176 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret); 1177 return ret; 1178 } 1179 } 1180 1181 phy_attached_info(p->phy); 1182 1183 return 0; 1184 } 1185 1186 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1187 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1188 struct netdev_queue *txq, 1189 void *_unused) 1190 { 1191 lockdep_set_class(&txq->_xmit_lock, 1192 &dsa_slave_netdev_xmit_lock_key); 1193 } 1194 1195 int dsa_slave_suspend(struct net_device *slave_dev) 1196 { 1197 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1198 1199 if (p->phy) { 1200 phy_stop(p->phy); 1201 p->old_pause = -1; 1202 p->old_link = -1; 1203 p->old_duplex = -1; 1204 phy_suspend(p->phy); 1205 } 1206 1207 return 0; 1208 } 1209 1210 int dsa_slave_resume(struct net_device *slave_dev) 1211 { 1212 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1213 1214 netif_device_attach(slave_dev); 1215 1216 if (p->phy) { 1217 phy_resume(p->phy); 1218 phy_start(p->phy); 1219 } 1220 1221 return 0; 1222 } 1223 1224 int dsa_slave_create(struct dsa_switch *ds, struct device *parent, 1225 int port, const char *name) 1226 { 1227 struct dsa_switch_tree *dst = ds->dst; 1228 struct net_device *master; 1229 struct net_device *slave_dev; 1230 struct dsa_slave_priv *p; 1231 int ret; 1232 1233 master = ds->dst->master_netdev; 1234 if (ds->master_netdev) 1235 master = ds->master_netdev; 1236 1237 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, 1238 NET_NAME_UNKNOWN, ether_setup); 1239 if (slave_dev == NULL) 1240 return -ENOMEM; 1241 1242 slave_dev->features = master->vlan_features; 1243 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1244 eth_hw_addr_inherit(slave_dev, master); 1245 slave_dev->priv_flags |= IFF_NO_QUEUE; 1246 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1247 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1248 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1249 1250 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1251 NULL); 1252 1253 SET_NETDEV_DEV(slave_dev, parent); 1254 slave_dev->dev.of_node = ds->ports[port].dn; 1255 slave_dev->vlan_features = master->vlan_features; 1256 1257 p = netdev_priv(slave_dev); 1258 p->parent = ds; 1259 p->port = port; 1260 p->xmit = dst->tag_ops->xmit; 1261 1262 p->old_pause = -1; 1263 p->old_link = -1; 1264 p->old_duplex = -1; 1265 1266 ds->ports[port].netdev = slave_dev; 1267 ret = register_netdev(slave_dev); 1268 if (ret) { 1269 netdev_err(master, "error %d registering interface %s\n", 1270 ret, slave_dev->name); 1271 ds->ports[port].netdev = NULL; 1272 free_netdev(slave_dev); 1273 return ret; 1274 } 1275 1276 netif_carrier_off(slave_dev); 1277 1278 ret = dsa_slave_phy_setup(p, slave_dev); 1279 if (ret) { 1280 netdev_err(master, "error %d setting up slave phy\n", ret); 1281 unregister_netdev(slave_dev); 1282 free_netdev(slave_dev); 1283 return ret; 1284 } 1285 1286 return 0; 1287 } 1288 1289 void dsa_slave_destroy(struct net_device *slave_dev) 1290 { 1291 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1292 1293 netif_carrier_off(slave_dev); 1294 if (p->phy) 1295 phy_disconnect(p->phy); 1296 unregister_netdev(slave_dev); 1297 free_netdev(slave_dev); 1298 } 1299 1300 static bool dsa_slave_dev_check(struct net_device *dev) 1301 { 1302 return dev->netdev_ops == &dsa_slave_netdev_ops; 1303 } 1304 1305 static int dsa_slave_port_upper_event(struct net_device *dev, 1306 unsigned long event, void *ptr) 1307 { 1308 struct netdev_notifier_changeupper_info *info = ptr; 1309 struct net_device *upper = info->upper_dev; 1310 int err = 0; 1311 1312 switch (event) { 1313 case NETDEV_CHANGEUPPER: 1314 if (netif_is_bridge_master(upper)) { 1315 if (info->linking) 1316 err = dsa_slave_bridge_port_join(dev, upper); 1317 else 1318 dsa_slave_bridge_port_leave(dev); 1319 } 1320 1321 break; 1322 } 1323 1324 return notifier_from_errno(err); 1325 } 1326 1327 static int dsa_slave_port_event(struct net_device *dev, unsigned long event, 1328 void *ptr) 1329 { 1330 switch (event) { 1331 case NETDEV_CHANGEUPPER: 1332 return dsa_slave_port_upper_event(dev, event, ptr); 1333 } 1334 1335 return NOTIFY_DONE; 1336 } 1337 1338 int dsa_slave_netdevice_event(struct notifier_block *unused, 1339 unsigned long event, void *ptr) 1340 { 1341 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1342 1343 if (dsa_slave_dev_check(dev)) 1344 return dsa_slave_port_event(dev, event, ptr); 1345 1346 return NOTIFY_DONE; 1347 } 1348