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 <net/rtnetlink.h> 19 #include <net/switchdev.h> 20 #include <linux/if_bridge.h> 21 #include <linux/netpoll.h> 22 #include "dsa_priv.h" 23 24 /* slave mii_bus handling ***************************************************/ 25 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 26 { 27 struct dsa_switch *ds = bus->priv; 28 29 if (ds->phys_mii_mask & (1 << addr)) 30 return ds->drv->phy_read(ds, addr, reg); 31 32 return 0xffff; 33 } 34 35 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 36 { 37 struct dsa_switch *ds = bus->priv; 38 39 if (ds->phys_mii_mask & (1 << addr)) 40 return ds->drv->phy_write(ds, addr, reg, val); 41 42 return 0; 43 } 44 45 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 46 { 47 ds->slave_mii_bus->priv = (void *)ds; 48 ds->slave_mii_bus->name = "dsa slave smi"; 49 ds->slave_mii_bus->read = dsa_slave_phy_read; 50 ds->slave_mii_bus->write = dsa_slave_phy_write; 51 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x", 52 ds->index, ds->pd->sw_addr); 53 ds->slave_mii_bus->parent = ds->master_dev; 54 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 55 } 56 57 58 /* slave device handling ****************************************************/ 59 static int dsa_slave_get_iflink(const struct net_device *dev) 60 { 61 struct dsa_slave_priv *p = netdev_priv(dev); 62 63 return p->parent->dst->master_netdev->ifindex; 64 } 65 66 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p) 67 { 68 return !!p->bridge_dev; 69 } 70 71 static int dsa_slave_open(struct net_device *dev) 72 { 73 struct dsa_slave_priv *p = netdev_priv(dev); 74 struct net_device *master = p->parent->dst->master_netdev; 75 struct dsa_switch *ds = p->parent; 76 u8 stp_state = dsa_port_is_bridged(p) ? 77 BR_STATE_BLOCKING : BR_STATE_FORWARDING; 78 int err; 79 80 if (!(master->flags & IFF_UP)) 81 return -ENETDOWN; 82 83 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 84 err = dev_uc_add(master, dev->dev_addr); 85 if (err < 0) 86 goto out; 87 } 88 89 if (dev->flags & IFF_ALLMULTI) { 90 err = dev_set_allmulti(master, 1); 91 if (err < 0) 92 goto del_unicast; 93 } 94 if (dev->flags & IFF_PROMISC) { 95 err = dev_set_promiscuity(master, 1); 96 if (err < 0) 97 goto clear_allmulti; 98 } 99 100 if (ds->drv->port_enable) { 101 err = ds->drv->port_enable(ds, p->port, p->phy); 102 if (err) 103 goto clear_promisc; 104 } 105 106 if (ds->drv->port_stp_update) 107 ds->drv->port_stp_update(ds, p->port, stp_state); 108 109 if (p->phy) 110 phy_start(p->phy); 111 112 return 0; 113 114 clear_promisc: 115 if (dev->flags & IFF_PROMISC) 116 dev_set_promiscuity(master, -1); 117 clear_allmulti: 118 if (dev->flags & IFF_ALLMULTI) 119 dev_set_allmulti(master, -1); 120 del_unicast: 121 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 122 dev_uc_del(master, dev->dev_addr); 123 out: 124 return err; 125 } 126 127 static int dsa_slave_close(struct net_device *dev) 128 { 129 struct dsa_slave_priv *p = netdev_priv(dev); 130 struct net_device *master = p->parent->dst->master_netdev; 131 struct dsa_switch *ds = p->parent; 132 133 if (p->phy) 134 phy_stop(p->phy); 135 136 dev_mc_unsync(master, dev); 137 dev_uc_unsync(master, dev); 138 if (dev->flags & IFF_ALLMULTI) 139 dev_set_allmulti(master, -1); 140 if (dev->flags & IFF_PROMISC) 141 dev_set_promiscuity(master, -1); 142 143 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 144 dev_uc_del(master, dev->dev_addr); 145 146 if (ds->drv->port_disable) 147 ds->drv->port_disable(ds, p->port, p->phy); 148 149 if (ds->drv->port_stp_update) 150 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED); 151 152 return 0; 153 } 154 155 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 156 { 157 struct dsa_slave_priv *p = netdev_priv(dev); 158 struct net_device *master = p->parent->dst->master_netdev; 159 160 if (change & IFF_ALLMULTI) 161 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); 162 if (change & IFF_PROMISC) 163 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); 164 } 165 166 static void dsa_slave_set_rx_mode(struct net_device *dev) 167 { 168 struct dsa_slave_priv *p = netdev_priv(dev); 169 struct net_device *master = p->parent->dst->master_netdev; 170 171 dev_mc_sync(master, dev); 172 dev_uc_sync(master, dev); 173 } 174 175 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 176 { 177 struct dsa_slave_priv *p = netdev_priv(dev); 178 struct net_device *master = p->parent->dst->master_netdev; 179 struct sockaddr *addr = a; 180 int err; 181 182 if (!is_valid_ether_addr(addr->sa_data)) 183 return -EADDRNOTAVAIL; 184 185 if (!(dev->flags & IFF_UP)) 186 goto out; 187 188 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 189 err = dev_uc_add(master, addr->sa_data); 190 if (err < 0) 191 return err; 192 } 193 194 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 195 dev_uc_del(master, dev->dev_addr); 196 197 out: 198 ether_addr_copy(dev->dev_addr, addr->sa_data); 199 200 return 0; 201 } 202 203 static int dsa_bridge_check_vlan_range(struct dsa_switch *ds, 204 const struct net_device *bridge, 205 u16 vid_begin, u16 vid_end) 206 { 207 struct dsa_slave_priv *p; 208 struct net_device *dev, *vlan_br; 209 DECLARE_BITMAP(members, DSA_MAX_PORTS); 210 DECLARE_BITMAP(untagged, DSA_MAX_PORTS); 211 u16 vid; 212 int member, err; 213 214 if (!ds->drv->vlan_getnext || !vid_begin) 215 return -EOPNOTSUPP; 216 217 vid = vid_begin - 1; 218 219 do { 220 err = ds->drv->vlan_getnext(ds, &vid, members, untagged); 221 if (err) 222 break; 223 224 if (vid > vid_end) 225 break; 226 227 member = find_first_bit(members, DSA_MAX_PORTS); 228 if (member == DSA_MAX_PORTS) 229 continue; 230 231 dev = ds->ports[member]; 232 p = netdev_priv(dev); 233 vlan_br = p->bridge_dev; 234 if (vlan_br == bridge) 235 continue; 236 237 netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid); 238 return -EOPNOTSUPP; 239 } while (vid < vid_end); 240 241 return err == -ENOENT ? 0 : err; 242 } 243 244 static int dsa_slave_port_vlan_add(struct net_device *dev, 245 const struct switchdev_obj_port_vlan *vlan, 246 struct switchdev_trans *trans) 247 { 248 struct dsa_slave_priv *p = netdev_priv(dev); 249 struct dsa_switch *ds = p->parent; 250 int err; 251 252 if (switchdev_trans_ph_prepare(trans)) { 253 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add) 254 return -EOPNOTSUPP; 255 256 /* If the requested port doesn't belong to the same bridge as 257 * the VLAN members, fallback to software VLAN (hopefully). 258 */ 259 err = dsa_bridge_check_vlan_range(ds, p->bridge_dev, 260 vlan->vid_begin, 261 vlan->vid_end); 262 if (err) 263 return err; 264 265 err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans); 266 if (err) 267 return err; 268 } else { 269 err = ds->drv->port_vlan_add(ds, p->port, vlan, trans); 270 if (err) 271 return err; 272 } 273 274 return 0; 275 } 276 277 static int dsa_slave_port_vlan_del(struct net_device *dev, 278 const struct switchdev_obj_port_vlan *vlan) 279 { 280 struct dsa_slave_priv *p = netdev_priv(dev); 281 struct dsa_switch *ds = p->parent; 282 283 if (!ds->drv->port_vlan_del) 284 return -EOPNOTSUPP; 285 286 return ds->drv->port_vlan_del(ds, p->port, vlan); 287 } 288 289 static int dsa_slave_port_vlan_dump(struct net_device *dev, 290 struct switchdev_obj_port_vlan *vlan, 291 switchdev_obj_dump_cb_t *cb) 292 { 293 struct dsa_slave_priv *p = netdev_priv(dev); 294 struct dsa_switch *ds = p->parent; 295 DECLARE_BITMAP(members, DSA_MAX_PORTS); 296 DECLARE_BITMAP(untagged, DSA_MAX_PORTS); 297 u16 pvid, vid = 0; 298 int err; 299 300 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get) 301 return -EOPNOTSUPP; 302 303 err = ds->drv->port_pvid_get(ds, p->port, &pvid); 304 if (err) 305 return err; 306 307 for (;;) { 308 err = ds->drv->vlan_getnext(ds, &vid, members, untagged); 309 if (err) 310 break; 311 312 if (!test_bit(p->port, members)) 313 continue; 314 315 memset(vlan, 0, sizeof(*vlan)); 316 vlan->vid_begin = vlan->vid_end = vid; 317 318 if (vid == pvid) 319 vlan->flags |= BRIDGE_VLAN_INFO_PVID; 320 321 if (test_bit(p->port, untagged)) 322 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED; 323 324 err = cb(&vlan->obj); 325 if (err) 326 break; 327 } 328 329 return err == -ENOENT ? 0 : err; 330 } 331 332 static int dsa_slave_port_fdb_add(struct net_device *dev, 333 const struct switchdev_obj_port_fdb *fdb, 334 struct switchdev_trans *trans) 335 { 336 struct dsa_slave_priv *p = netdev_priv(dev); 337 struct dsa_switch *ds = p->parent; 338 int ret; 339 340 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add) 341 return -EOPNOTSUPP; 342 343 if (switchdev_trans_ph_prepare(trans)) 344 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans); 345 else 346 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans); 347 348 return ret; 349 } 350 351 static int dsa_slave_port_fdb_del(struct net_device *dev, 352 const struct switchdev_obj_port_fdb *fdb) 353 { 354 struct dsa_slave_priv *p = netdev_priv(dev); 355 struct dsa_switch *ds = p->parent; 356 int ret = -EOPNOTSUPP; 357 358 if (ds->drv->port_fdb_del) 359 ret = ds->drv->port_fdb_del(ds, p->port, fdb); 360 361 return ret; 362 } 363 364 static int dsa_slave_port_fdb_dump(struct net_device *dev, 365 struct switchdev_obj_port_fdb *fdb, 366 switchdev_obj_dump_cb_t *cb) 367 { 368 struct dsa_slave_priv *p = netdev_priv(dev); 369 struct dsa_switch *ds = p->parent; 370 371 if (ds->drv->port_fdb_dump) 372 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb); 373 374 return -EOPNOTSUPP; 375 } 376 377 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 378 { 379 struct dsa_slave_priv *p = netdev_priv(dev); 380 381 if (p->phy != NULL) 382 return phy_mii_ioctl(p->phy, ifr, cmd); 383 384 return -EOPNOTSUPP; 385 } 386 387 /* Return a bitmask of all ports being currently bridged within a given bridge 388 * device. Note that on leave, the mask will still return the bitmask of ports 389 * currently bridged, prior to port removal, and this is exactly what we want. 390 */ 391 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds, 392 struct net_device *bridge) 393 { 394 struct dsa_slave_priv *p; 395 unsigned int port; 396 u32 mask = 0; 397 398 for (port = 0; port < DSA_MAX_PORTS; port++) { 399 if (!dsa_is_port_initialized(ds, port)) 400 continue; 401 402 p = netdev_priv(ds->ports[port]); 403 404 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT && 405 p->bridge_dev == bridge) 406 mask |= 1 << port; 407 } 408 409 return mask; 410 } 411 412 static int dsa_slave_stp_update(struct net_device *dev, u8 state) 413 { 414 struct dsa_slave_priv *p = netdev_priv(dev); 415 struct dsa_switch *ds = p->parent; 416 int ret = -EOPNOTSUPP; 417 418 if (ds->drv->port_stp_update) 419 ret = ds->drv->port_stp_update(ds, p->port, state); 420 421 return ret; 422 } 423 424 static int dsa_slave_port_attr_set(struct net_device *dev, 425 const struct switchdev_attr *attr, 426 struct switchdev_trans *trans) 427 { 428 struct dsa_slave_priv *p = netdev_priv(dev); 429 struct dsa_switch *ds = p->parent; 430 int ret; 431 432 switch (attr->id) { 433 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 434 if (switchdev_trans_ph_prepare(trans)) 435 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP; 436 else 437 ret = ds->drv->port_stp_update(ds, p->port, 438 attr->u.stp_state); 439 break; 440 default: 441 ret = -EOPNOTSUPP; 442 break; 443 } 444 445 return ret; 446 } 447 448 static int dsa_slave_port_obj_add(struct net_device *dev, 449 const struct switchdev_obj *obj, 450 struct switchdev_trans *trans) 451 { 452 int err; 453 454 /* For the prepare phase, ensure the full set of changes is feasable in 455 * one go in order to signal a failure properly. If an operation is not 456 * supported, return -EOPNOTSUPP. 457 */ 458 459 switch (obj->id) { 460 case SWITCHDEV_OBJ_ID_PORT_FDB: 461 err = dsa_slave_port_fdb_add(dev, 462 SWITCHDEV_OBJ_PORT_FDB(obj), 463 trans); 464 break; 465 case SWITCHDEV_OBJ_ID_PORT_VLAN: 466 err = dsa_slave_port_vlan_add(dev, 467 SWITCHDEV_OBJ_PORT_VLAN(obj), 468 trans); 469 break; 470 default: 471 err = -EOPNOTSUPP; 472 break; 473 } 474 475 return err; 476 } 477 478 static int dsa_slave_port_obj_del(struct net_device *dev, 479 const struct switchdev_obj *obj) 480 { 481 int err; 482 483 switch (obj->id) { 484 case SWITCHDEV_OBJ_ID_PORT_FDB: 485 err = dsa_slave_port_fdb_del(dev, 486 SWITCHDEV_OBJ_PORT_FDB(obj)); 487 break; 488 case SWITCHDEV_OBJ_ID_PORT_VLAN: 489 err = dsa_slave_port_vlan_del(dev, 490 SWITCHDEV_OBJ_PORT_VLAN(obj)); 491 break; 492 default: 493 err = -EOPNOTSUPP; 494 break; 495 } 496 497 return err; 498 } 499 500 static int dsa_slave_port_obj_dump(struct net_device *dev, 501 struct switchdev_obj *obj, 502 switchdev_obj_dump_cb_t *cb) 503 { 504 int err; 505 506 switch (obj->id) { 507 case SWITCHDEV_OBJ_ID_PORT_FDB: 508 err = dsa_slave_port_fdb_dump(dev, 509 SWITCHDEV_OBJ_PORT_FDB(obj), 510 cb); 511 break; 512 case SWITCHDEV_OBJ_ID_PORT_VLAN: 513 err = dsa_slave_port_vlan_dump(dev, 514 SWITCHDEV_OBJ_PORT_VLAN(obj), 515 cb); 516 break; 517 default: 518 err = -EOPNOTSUPP; 519 break; 520 } 521 522 return err; 523 } 524 525 static int dsa_slave_bridge_port_join(struct net_device *dev, 526 struct net_device *br) 527 { 528 struct dsa_slave_priv *p = netdev_priv(dev); 529 struct dsa_switch *ds = p->parent; 530 int ret = -EOPNOTSUPP; 531 532 p->bridge_dev = br; 533 534 if (ds->drv->port_join_bridge) 535 ret = ds->drv->port_join_bridge(ds, p->port, 536 dsa_slave_br_port_mask(ds, br)); 537 538 return ret; 539 } 540 541 static int dsa_slave_bridge_port_leave(struct net_device *dev) 542 { 543 struct dsa_slave_priv *p = netdev_priv(dev); 544 struct dsa_switch *ds = p->parent; 545 int ret = -EOPNOTSUPP; 546 547 548 if (ds->drv->port_leave_bridge) 549 ret = ds->drv->port_leave_bridge(ds, p->port, 550 dsa_slave_br_port_mask(ds, p->bridge_dev)); 551 552 p->bridge_dev = NULL; 553 554 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 555 * so allow it to be in BR_STATE_FORWARDING to be kept functional 556 */ 557 dsa_slave_stp_update(dev, BR_STATE_FORWARDING); 558 559 return ret; 560 } 561 562 static int dsa_slave_port_attr_get(struct net_device *dev, 563 struct switchdev_attr *attr) 564 { 565 struct dsa_slave_priv *p = netdev_priv(dev); 566 struct dsa_switch *ds = p->parent; 567 568 switch (attr->id) { 569 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: 570 attr->u.ppid.id_len = sizeof(ds->index); 571 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len); 572 break; 573 default: 574 return -EOPNOTSUPP; 575 } 576 577 return 0; 578 } 579 580 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p, 581 struct sk_buff *skb) 582 { 583 #ifdef CONFIG_NET_POLL_CONTROLLER 584 if (p->netpoll) 585 netpoll_send_skb(p->netpoll, skb); 586 #else 587 BUG(); 588 #endif 589 return NETDEV_TX_OK; 590 } 591 592 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 593 { 594 struct dsa_slave_priv *p = netdev_priv(dev); 595 struct sk_buff *nskb; 596 597 dev->stats.tx_packets++; 598 dev->stats.tx_bytes += skb->len; 599 600 /* Transmit function may have to reallocate the original SKB */ 601 nskb = p->xmit(skb, dev); 602 if (!nskb) 603 return NETDEV_TX_OK; 604 605 /* SKB for netpoll still need to be mangled with the protocol-specific 606 * tag to be successfully transmitted 607 */ 608 if (unlikely(netpoll_tx_running(dev))) 609 return dsa_netpoll_send_skb(p, nskb); 610 611 /* Queue the SKB for transmission on the parent interface, but 612 * do not modify its EtherType 613 */ 614 nskb->dev = p->parent->dst->master_netdev; 615 dev_queue_xmit(nskb); 616 617 return NETDEV_TX_OK; 618 } 619 620 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb, 621 struct net_device *dev) 622 { 623 /* Just return the original SKB */ 624 return skb; 625 } 626 627 628 /* ethtool operations *******************************************************/ 629 static int 630 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 631 { 632 struct dsa_slave_priv *p = netdev_priv(dev); 633 int err; 634 635 err = -EOPNOTSUPP; 636 if (p->phy != NULL) { 637 err = phy_read_status(p->phy); 638 if (err == 0) 639 err = phy_ethtool_gset(p->phy, cmd); 640 } 641 642 return err; 643 } 644 645 static int 646 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 647 { 648 struct dsa_slave_priv *p = netdev_priv(dev); 649 650 if (p->phy != NULL) 651 return phy_ethtool_sset(p->phy, cmd); 652 653 return -EOPNOTSUPP; 654 } 655 656 static void dsa_slave_get_drvinfo(struct net_device *dev, 657 struct ethtool_drvinfo *drvinfo) 658 { 659 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 660 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version)); 661 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 662 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 663 } 664 665 static int dsa_slave_get_regs_len(struct net_device *dev) 666 { 667 struct dsa_slave_priv *p = netdev_priv(dev); 668 struct dsa_switch *ds = p->parent; 669 670 if (ds->drv->get_regs_len) 671 return ds->drv->get_regs_len(ds, p->port); 672 673 return -EOPNOTSUPP; 674 } 675 676 static void 677 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 678 { 679 struct dsa_slave_priv *p = netdev_priv(dev); 680 struct dsa_switch *ds = p->parent; 681 682 if (ds->drv->get_regs) 683 ds->drv->get_regs(ds, p->port, regs, _p); 684 } 685 686 static int dsa_slave_nway_reset(struct net_device *dev) 687 { 688 struct dsa_slave_priv *p = netdev_priv(dev); 689 690 if (p->phy != NULL) 691 return genphy_restart_aneg(p->phy); 692 693 return -EOPNOTSUPP; 694 } 695 696 static u32 dsa_slave_get_link(struct net_device *dev) 697 { 698 struct dsa_slave_priv *p = netdev_priv(dev); 699 700 if (p->phy != NULL) { 701 genphy_update_link(p->phy); 702 return p->phy->link; 703 } 704 705 return -EOPNOTSUPP; 706 } 707 708 static int dsa_slave_get_eeprom_len(struct net_device *dev) 709 { 710 struct dsa_slave_priv *p = netdev_priv(dev); 711 struct dsa_switch *ds = p->parent; 712 713 if (ds->pd->eeprom_len) 714 return ds->pd->eeprom_len; 715 716 if (ds->drv->get_eeprom_len) 717 return ds->drv->get_eeprom_len(ds); 718 719 return 0; 720 } 721 722 static int dsa_slave_get_eeprom(struct net_device *dev, 723 struct ethtool_eeprom *eeprom, u8 *data) 724 { 725 struct dsa_slave_priv *p = netdev_priv(dev); 726 struct dsa_switch *ds = p->parent; 727 728 if (ds->drv->get_eeprom) 729 return ds->drv->get_eeprom(ds, eeprom, data); 730 731 return -EOPNOTSUPP; 732 } 733 734 static int dsa_slave_set_eeprom(struct net_device *dev, 735 struct ethtool_eeprom *eeprom, u8 *data) 736 { 737 struct dsa_slave_priv *p = netdev_priv(dev); 738 struct dsa_switch *ds = p->parent; 739 740 if (ds->drv->set_eeprom) 741 return ds->drv->set_eeprom(ds, eeprom, data); 742 743 return -EOPNOTSUPP; 744 } 745 746 static void dsa_slave_get_strings(struct net_device *dev, 747 uint32_t stringset, uint8_t *data) 748 { 749 struct dsa_slave_priv *p = netdev_priv(dev); 750 struct dsa_switch *ds = p->parent; 751 752 if (stringset == ETH_SS_STATS) { 753 int len = ETH_GSTRING_LEN; 754 755 strncpy(data, "tx_packets", len); 756 strncpy(data + len, "tx_bytes", len); 757 strncpy(data + 2 * len, "rx_packets", len); 758 strncpy(data + 3 * len, "rx_bytes", len); 759 if (ds->drv->get_strings != NULL) 760 ds->drv->get_strings(ds, p->port, data + 4 * len); 761 } 762 } 763 764 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 765 struct ethtool_stats *stats, 766 uint64_t *data) 767 { 768 struct dsa_slave_priv *p = netdev_priv(dev); 769 struct dsa_switch *ds = p->parent; 770 771 data[0] = p->dev->stats.tx_packets; 772 data[1] = p->dev->stats.tx_bytes; 773 data[2] = p->dev->stats.rx_packets; 774 data[3] = p->dev->stats.rx_bytes; 775 if (ds->drv->get_ethtool_stats != NULL) 776 ds->drv->get_ethtool_stats(ds, p->port, data + 4); 777 } 778 779 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 780 { 781 struct dsa_slave_priv *p = netdev_priv(dev); 782 struct dsa_switch *ds = p->parent; 783 784 if (sset == ETH_SS_STATS) { 785 int count; 786 787 count = 4; 788 if (ds->drv->get_sset_count != NULL) 789 count += ds->drv->get_sset_count(ds); 790 791 return count; 792 } 793 794 return -EOPNOTSUPP; 795 } 796 797 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 798 { 799 struct dsa_slave_priv *p = netdev_priv(dev); 800 struct dsa_switch *ds = p->parent; 801 802 if (ds->drv->get_wol) 803 ds->drv->get_wol(ds, p->port, w); 804 } 805 806 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 807 { 808 struct dsa_slave_priv *p = netdev_priv(dev); 809 struct dsa_switch *ds = p->parent; 810 int ret = -EOPNOTSUPP; 811 812 if (ds->drv->set_wol) 813 ret = ds->drv->set_wol(ds, p->port, w); 814 815 return ret; 816 } 817 818 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 819 { 820 struct dsa_slave_priv *p = netdev_priv(dev); 821 struct dsa_switch *ds = p->parent; 822 int ret; 823 824 if (!ds->drv->set_eee) 825 return -EOPNOTSUPP; 826 827 ret = ds->drv->set_eee(ds, p->port, p->phy, e); 828 if (ret) 829 return ret; 830 831 if (p->phy) 832 ret = phy_ethtool_set_eee(p->phy, e); 833 834 return ret; 835 } 836 837 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 838 { 839 struct dsa_slave_priv *p = netdev_priv(dev); 840 struct dsa_switch *ds = p->parent; 841 int ret; 842 843 if (!ds->drv->get_eee) 844 return -EOPNOTSUPP; 845 846 ret = ds->drv->get_eee(ds, p->port, e); 847 if (ret) 848 return ret; 849 850 if (p->phy) 851 ret = phy_ethtool_get_eee(p->phy, e); 852 853 return ret; 854 } 855 856 #ifdef CONFIG_NET_POLL_CONTROLLER 857 static int dsa_slave_netpoll_setup(struct net_device *dev, 858 struct netpoll_info *ni) 859 { 860 struct dsa_slave_priv *p = netdev_priv(dev); 861 struct dsa_switch *ds = p->parent; 862 struct net_device *master = ds->dst->master_netdev; 863 struct netpoll *netpoll; 864 int err = 0; 865 866 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 867 if (!netpoll) 868 return -ENOMEM; 869 870 err = __netpoll_setup(netpoll, master); 871 if (err) { 872 kfree(netpoll); 873 goto out; 874 } 875 876 p->netpoll = netpoll; 877 out: 878 return err; 879 } 880 881 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 882 { 883 struct dsa_slave_priv *p = netdev_priv(dev); 884 struct netpoll *netpoll = p->netpoll; 885 886 if (!netpoll) 887 return; 888 889 p->netpoll = NULL; 890 891 __netpoll_free_async(netpoll); 892 } 893 894 static void dsa_slave_poll_controller(struct net_device *dev) 895 { 896 } 897 #endif 898 899 static const struct ethtool_ops dsa_slave_ethtool_ops = { 900 .get_settings = dsa_slave_get_settings, 901 .set_settings = dsa_slave_set_settings, 902 .get_drvinfo = dsa_slave_get_drvinfo, 903 .get_regs_len = dsa_slave_get_regs_len, 904 .get_regs = dsa_slave_get_regs, 905 .nway_reset = dsa_slave_nway_reset, 906 .get_link = dsa_slave_get_link, 907 .get_eeprom_len = dsa_slave_get_eeprom_len, 908 .get_eeprom = dsa_slave_get_eeprom, 909 .set_eeprom = dsa_slave_set_eeprom, 910 .get_strings = dsa_slave_get_strings, 911 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 912 .get_sset_count = dsa_slave_get_sset_count, 913 .set_wol = dsa_slave_set_wol, 914 .get_wol = dsa_slave_get_wol, 915 .set_eee = dsa_slave_set_eee, 916 .get_eee = dsa_slave_get_eee, 917 }; 918 919 static const struct net_device_ops dsa_slave_netdev_ops = { 920 .ndo_open = dsa_slave_open, 921 .ndo_stop = dsa_slave_close, 922 .ndo_start_xmit = dsa_slave_xmit, 923 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 924 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 925 .ndo_set_mac_address = dsa_slave_set_mac_address, 926 .ndo_fdb_add = switchdev_port_fdb_add, 927 .ndo_fdb_del = switchdev_port_fdb_del, 928 .ndo_fdb_dump = switchdev_port_fdb_dump, 929 .ndo_do_ioctl = dsa_slave_ioctl, 930 .ndo_get_iflink = dsa_slave_get_iflink, 931 #ifdef CONFIG_NET_POLL_CONTROLLER 932 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 933 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 934 .ndo_poll_controller = dsa_slave_poll_controller, 935 #endif 936 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 937 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 938 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 939 }; 940 941 static const struct switchdev_ops dsa_slave_switchdev_ops = { 942 .switchdev_port_attr_get = dsa_slave_port_attr_get, 943 .switchdev_port_attr_set = dsa_slave_port_attr_set, 944 .switchdev_port_obj_add = dsa_slave_port_obj_add, 945 .switchdev_port_obj_del = dsa_slave_port_obj_del, 946 .switchdev_port_obj_dump = dsa_slave_port_obj_dump, 947 }; 948 949 static struct device_type dsa_type = { 950 .name = "dsa", 951 }; 952 953 static void dsa_slave_adjust_link(struct net_device *dev) 954 { 955 struct dsa_slave_priv *p = netdev_priv(dev); 956 struct dsa_switch *ds = p->parent; 957 unsigned int status_changed = 0; 958 959 if (p->old_link != p->phy->link) { 960 status_changed = 1; 961 p->old_link = p->phy->link; 962 } 963 964 if (p->old_duplex != p->phy->duplex) { 965 status_changed = 1; 966 p->old_duplex = p->phy->duplex; 967 } 968 969 if (p->old_pause != p->phy->pause) { 970 status_changed = 1; 971 p->old_pause = p->phy->pause; 972 } 973 974 if (ds->drv->adjust_link && status_changed) 975 ds->drv->adjust_link(ds, p->port, p->phy); 976 977 if (status_changed) 978 phy_print_status(p->phy); 979 } 980 981 static int dsa_slave_fixed_link_update(struct net_device *dev, 982 struct fixed_phy_status *status) 983 { 984 struct dsa_slave_priv *p = netdev_priv(dev); 985 struct dsa_switch *ds = p->parent; 986 987 if (ds->drv->fixed_link_update) 988 ds->drv->fixed_link_update(ds, p->port, status); 989 990 return 0; 991 } 992 993 /* slave device setup *******************************************************/ 994 static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 995 struct net_device *slave_dev, 996 int addr) 997 { 998 struct dsa_switch *ds = p->parent; 999 1000 p->phy = ds->slave_mii_bus->phy_map[addr]; 1001 if (!p->phy) { 1002 netdev_err(slave_dev, "no phy at %d\n", addr); 1003 return -ENODEV; 1004 } 1005 1006 /* Use already configured phy mode */ 1007 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1008 p->phy_interface = p->phy->interface; 1009 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 1010 p->phy_interface); 1011 1012 return 0; 1013 } 1014 1015 static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 1016 struct net_device *slave_dev) 1017 { 1018 struct dsa_switch *ds = p->parent; 1019 struct dsa_chip_data *cd = ds->pd; 1020 struct device_node *phy_dn, *port_dn; 1021 bool phy_is_fixed = false; 1022 u32 phy_flags = 0; 1023 int mode, ret; 1024 1025 port_dn = cd->port_dn[p->port]; 1026 mode = of_get_phy_mode(port_dn); 1027 if (mode < 0) 1028 mode = PHY_INTERFACE_MODE_NA; 1029 p->phy_interface = mode; 1030 1031 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1032 if (of_phy_is_fixed_link(port_dn)) { 1033 /* In the case of a fixed PHY, the DT node associated 1034 * to the fixed PHY is the Port DT node 1035 */ 1036 ret = of_phy_register_fixed_link(port_dn); 1037 if (ret) { 1038 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1039 return ret; 1040 } 1041 phy_is_fixed = true; 1042 phy_dn = port_dn; 1043 } 1044 1045 if (ds->drv->get_phy_flags) 1046 phy_flags = ds->drv->get_phy_flags(ds, p->port); 1047 1048 if (phy_dn) { 1049 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 1050 1051 /* If this PHY address is part of phys_mii_mask, which means 1052 * that we need to divert reads and writes to/from it, then we 1053 * want to bind this device using the slave MII bus created by 1054 * DSA to make that happen. 1055 */ 1056 if (!phy_is_fixed && phy_id >= 0 && 1057 (ds->phys_mii_mask & (1 << phy_id))) { 1058 ret = dsa_slave_phy_connect(p, slave_dev, phy_id); 1059 if (ret) { 1060 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); 1061 return ret; 1062 } 1063 } else { 1064 p->phy = of_phy_connect(slave_dev, phy_dn, 1065 dsa_slave_adjust_link, 1066 phy_flags, 1067 p->phy_interface); 1068 } 1069 } 1070 1071 if (p->phy && phy_is_fixed) 1072 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 1073 1074 /* We could not connect to a designated PHY, so use the switch internal 1075 * MDIO bus instead 1076 */ 1077 if (!p->phy) { 1078 ret = dsa_slave_phy_connect(p, slave_dev, p->port); 1079 if (ret) { 1080 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret); 1081 return ret; 1082 } 1083 } else { 1084 netdev_info(slave_dev, "attached PHY at address %d [%s]\n", 1085 p->phy->addr, p->phy->drv->name); 1086 } 1087 1088 return 0; 1089 } 1090 1091 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1092 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1093 struct netdev_queue *txq, 1094 void *_unused) 1095 { 1096 lockdep_set_class(&txq->_xmit_lock, 1097 &dsa_slave_netdev_xmit_lock_key); 1098 } 1099 1100 int dsa_slave_suspend(struct net_device *slave_dev) 1101 { 1102 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1103 1104 if (p->phy) { 1105 phy_stop(p->phy); 1106 p->old_pause = -1; 1107 p->old_link = -1; 1108 p->old_duplex = -1; 1109 phy_suspend(p->phy); 1110 } 1111 1112 return 0; 1113 } 1114 1115 int dsa_slave_resume(struct net_device *slave_dev) 1116 { 1117 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1118 1119 netif_device_attach(slave_dev); 1120 1121 if (p->phy) { 1122 phy_resume(p->phy); 1123 phy_start(p->phy); 1124 } 1125 1126 return 0; 1127 } 1128 1129 int dsa_slave_create(struct dsa_switch *ds, struct device *parent, 1130 int port, char *name) 1131 { 1132 struct net_device *master = ds->dst->master_netdev; 1133 struct net_device *slave_dev; 1134 struct dsa_slave_priv *p; 1135 int ret; 1136 1137 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, 1138 NET_NAME_UNKNOWN, ether_setup); 1139 if (slave_dev == NULL) 1140 return -ENOMEM; 1141 1142 slave_dev->features = master->vlan_features; 1143 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1144 eth_hw_addr_inherit(slave_dev, master); 1145 slave_dev->priv_flags |= IFF_NO_QUEUE; 1146 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1147 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1148 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1149 1150 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1151 NULL); 1152 1153 SET_NETDEV_DEV(slave_dev, parent); 1154 slave_dev->dev.of_node = ds->pd->port_dn[port]; 1155 slave_dev->vlan_features = master->vlan_features; 1156 1157 p = netdev_priv(slave_dev); 1158 p->dev = slave_dev; 1159 p->parent = ds; 1160 p->port = port; 1161 1162 switch (ds->dst->tag_protocol) { 1163 #ifdef CONFIG_NET_DSA_TAG_DSA 1164 case DSA_TAG_PROTO_DSA: 1165 p->xmit = dsa_netdev_ops.xmit; 1166 break; 1167 #endif 1168 #ifdef CONFIG_NET_DSA_TAG_EDSA 1169 case DSA_TAG_PROTO_EDSA: 1170 p->xmit = edsa_netdev_ops.xmit; 1171 break; 1172 #endif 1173 #ifdef CONFIG_NET_DSA_TAG_TRAILER 1174 case DSA_TAG_PROTO_TRAILER: 1175 p->xmit = trailer_netdev_ops.xmit; 1176 break; 1177 #endif 1178 #ifdef CONFIG_NET_DSA_TAG_BRCM 1179 case DSA_TAG_PROTO_BRCM: 1180 p->xmit = brcm_netdev_ops.xmit; 1181 break; 1182 #endif 1183 default: 1184 p->xmit = dsa_slave_notag_xmit; 1185 break; 1186 } 1187 1188 p->old_pause = -1; 1189 p->old_link = -1; 1190 p->old_duplex = -1; 1191 1192 ret = dsa_slave_phy_setup(p, slave_dev); 1193 if (ret) { 1194 netdev_err(master, "error %d setting up slave phy\n", ret); 1195 free_netdev(slave_dev); 1196 return ret; 1197 } 1198 1199 ds->ports[port] = slave_dev; 1200 ret = register_netdev(slave_dev); 1201 if (ret) { 1202 netdev_err(master, "error %d registering interface %s\n", 1203 ret, slave_dev->name); 1204 phy_disconnect(p->phy); 1205 ds->ports[port] = NULL; 1206 free_netdev(slave_dev); 1207 return ret; 1208 } 1209 1210 netif_carrier_off(slave_dev); 1211 1212 return 0; 1213 } 1214 1215 static bool dsa_slave_dev_check(struct net_device *dev) 1216 { 1217 return dev->netdev_ops == &dsa_slave_netdev_ops; 1218 } 1219 1220 static int dsa_slave_master_changed(struct net_device *dev) 1221 { 1222 struct net_device *master = netdev_master_upper_dev_get(dev); 1223 struct dsa_slave_priv *p = netdev_priv(dev); 1224 int err = 0; 1225 1226 if (master && master->rtnl_link_ops && 1227 !strcmp(master->rtnl_link_ops->kind, "bridge")) 1228 err = dsa_slave_bridge_port_join(dev, master); 1229 else if (dsa_port_is_bridged(p)) 1230 err = dsa_slave_bridge_port_leave(dev); 1231 1232 return err; 1233 } 1234 1235 int dsa_slave_netdevice_event(struct notifier_block *unused, 1236 unsigned long event, void *ptr) 1237 { 1238 struct net_device *dev; 1239 int err = 0; 1240 1241 switch (event) { 1242 case NETDEV_CHANGEUPPER: 1243 dev = netdev_notifier_info_to_dev(ptr); 1244 if (!dsa_slave_dev_check(dev)) 1245 goto out; 1246 1247 err = dsa_slave_master_changed(dev); 1248 if (err && err != -EOPNOTSUPP) 1249 netdev_warn(dev, "failed to reflect master change\n"); 1250 1251 break; 1252 } 1253 1254 out: 1255 return NOTIFY_DONE; 1256 } 1257