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->drv->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->drv->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:%.2x", 53 ds->index, ds->pd->sw_addr); 54 ds->slave_mii_bus->parent = ds->master_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 int dsa_slave_open(struct net_device *dev) 73 { 74 struct dsa_slave_priv *p = netdev_priv(dev); 75 struct net_device *master = p->parent->dst->master_netdev; 76 struct dsa_switch *ds = p->parent; 77 u8 stp_state = dsa_port_is_bridged(p) ? 78 BR_STATE_BLOCKING : BR_STATE_FORWARDING; 79 int err; 80 81 if (!(master->flags & IFF_UP)) 82 return -ENETDOWN; 83 84 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 85 err = dev_uc_add(master, dev->dev_addr); 86 if (err < 0) 87 goto out; 88 } 89 90 if (dev->flags & IFF_ALLMULTI) { 91 err = dev_set_allmulti(master, 1); 92 if (err < 0) 93 goto del_unicast; 94 } 95 if (dev->flags & IFF_PROMISC) { 96 err = dev_set_promiscuity(master, 1); 97 if (err < 0) 98 goto clear_allmulti; 99 } 100 101 if (ds->drv->port_enable) { 102 err = ds->drv->port_enable(ds, p->port, p->phy); 103 if (err) 104 goto clear_promisc; 105 } 106 107 if (ds->drv->port_stp_update) 108 ds->drv->port_stp_update(ds, p->port, stp_state); 109 110 if (p->phy) 111 phy_start(p->phy); 112 113 return 0; 114 115 clear_promisc: 116 if (dev->flags & IFF_PROMISC) 117 dev_set_promiscuity(master, -1); 118 clear_allmulti: 119 if (dev->flags & IFF_ALLMULTI) 120 dev_set_allmulti(master, -1); 121 del_unicast: 122 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 123 dev_uc_del(master, dev->dev_addr); 124 out: 125 return err; 126 } 127 128 static int dsa_slave_close(struct net_device *dev) 129 { 130 struct dsa_slave_priv *p = netdev_priv(dev); 131 struct net_device *master = p->parent->dst->master_netdev; 132 struct dsa_switch *ds = p->parent; 133 134 if (p->phy) 135 phy_stop(p->phy); 136 137 dev_mc_unsync(master, dev); 138 dev_uc_unsync(master, dev); 139 if (dev->flags & IFF_ALLMULTI) 140 dev_set_allmulti(master, -1); 141 if (dev->flags & IFF_PROMISC) 142 dev_set_promiscuity(master, -1); 143 144 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 145 dev_uc_del(master, dev->dev_addr); 146 147 if (ds->drv->port_disable) 148 ds->drv->port_disable(ds, p->port, p->phy); 149 150 if (ds->drv->port_stp_update) 151 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED); 152 153 return 0; 154 } 155 156 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 157 { 158 struct dsa_slave_priv *p = netdev_priv(dev); 159 struct net_device *master = p->parent->dst->master_netdev; 160 161 if (change & IFF_ALLMULTI) 162 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); 163 if (change & IFF_PROMISC) 164 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); 165 } 166 167 static void dsa_slave_set_rx_mode(struct net_device *dev) 168 { 169 struct dsa_slave_priv *p = netdev_priv(dev); 170 struct net_device *master = p->parent->dst->master_netdev; 171 172 dev_mc_sync(master, dev); 173 dev_uc_sync(master, dev); 174 } 175 176 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 177 { 178 struct dsa_slave_priv *p = netdev_priv(dev); 179 struct net_device *master = p->parent->dst->master_netdev; 180 struct sockaddr *addr = a; 181 int err; 182 183 if (!is_valid_ether_addr(addr->sa_data)) 184 return -EADDRNOTAVAIL; 185 186 if (!(dev->flags & IFF_UP)) 187 goto out; 188 189 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 190 err = dev_uc_add(master, addr->sa_data); 191 if (err < 0) 192 return err; 193 } 194 195 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 196 dev_uc_del(master, dev->dev_addr); 197 198 out: 199 ether_addr_copy(dev->dev_addr, addr->sa_data); 200 201 return 0; 202 } 203 204 static int dsa_bridge_check_vlan_range(struct dsa_switch *ds, 205 const struct net_device *bridge, 206 u16 vid_begin, u16 vid_end) 207 { 208 struct dsa_slave_priv *p; 209 struct net_device *dev, *vlan_br; 210 DECLARE_BITMAP(members, DSA_MAX_PORTS); 211 DECLARE_BITMAP(untagged, DSA_MAX_PORTS); 212 u16 vid; 213 int member, err; 214 215 if (!ds->drv->vlan_getnext || !vid_begin) 216 return -EOPNOTSUPP; 217 218 vid = vid_begin - 1; 219 220 do { 221 err = ds->drv->vlan_getnext(ds, &vid, members, untagged); 222 if (err) 223 break; 224 225 if (vid > vid_end) 226 break; 227 228 member = find_first_bit(members, DSA_MAX_PORTS); 229 if (member == DSA_MAX_PORTS) 230 continue; 231 232 dev = ds->ports[member]; 233 p = netdev_priv(dev); 234 vlan_br = p->bridge_dev; 235 if (vlan_br == bridge) 236 continue; 237 238 netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid); 239 return -EOPNOTSUPP; 240 } while (vid < vid_end); 241 242 return err == -ENOENT ? 0 : err; 243 } 244 245 static int dsa_slave_port_vlan_add(struct net_device *dev, 246 const struct switchdev_obj_port_vlan *vlan, 247 struct switchdev_trans *trans) 248 { 249 struct dsa_slave_priv *p = netdev_priv(dev); 250 struct dsa_switch *ds = p->parent; 251 int err; 252 253 if (switchdev_trans_ph_prepare(trans)) { 254 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add) 255 return -EOPNOTSUPP; 256 257 /* If the requested port doesn't belong to the same bridge as 258 * the VLAN members, fallback to software VLAN (hopefully). 259 */ 260 err = dsa_bridge_check_vlan_range(ds, p->bridge_dev, 261 vlan->vid_begin, 262 vlan->vid_end); 263 if (err) 264 return err; 265 266 err = ds->drv->port_vlan_prepare(ds, p->port, vlan, trans); 267 if (err) 268 return err; 269 } else { 270 err = ds->drv->port_vlan_add(ds, p->port, vlan, trans); 271 if (err) 272 return err; 273 } 274 275 return 0; 276 } 277 278 static int dsa_slave_port_vlan_del(struct net_device *dev, 279 const struct switchdev_obj_port_vlan *vlan) 280 { 281 struct dsa_slave_priv *p = netdev_priv(dev); 282 struct dsa_switch *ds = p->parent; 283 284 if (!ds->drv->port_vlan_del) 285 return -EOPNOTSUPP; 286 287 return ds->drv->port_vlan_del(ds, p->port, vlan); 288 } 289 290 static int dsa_slave_port_vlan_dump(struct net_device *dev, 291 struct switchdev_obj_port_vlan *vlan, 292 switchdev_obj_dump_cb_t *cb) 293 { 294 struct dsa_slave_priv *p = netdev_priv(dev); 295 struct dsa_switch *ds = p->parent; 296 DECLARE_BITMAP(members, DSA_MAX_PORTS); 297 DECLARE_BITMAP(untagged, DSA_MAX_PORTS); 298 u16 pvid, vid = 0; 299 int err; 300 301 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get) 302 return -EOPNOTSUPP; 303 304 err = ds->drv->port_pvid_get(ds, p->port, &pvid); 305 if (err) 306 return err; 307 308 for (;;) { 309 err = ds->drv->vlan_getnext(ds, &vid, members, untagged); 310 if (err) 311 break; 312 313 if (!test_bit(p->port, members)) 314 continue; 315 316 memset(vlan, 0, sizeof(*vlan)); 317 vlan->vid_begin = vlan->vid_end = vid; 318 319 if (vid == pvid) 320 vlan->flags |= BRIDGE_VLAN_INFO_PVID; 321 322 if (test_bit(p->port, untagged)) 323 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED; 324 325 err = cb(&vlan->obj); 326 if (err) 327 break; 328 } 329 330 return err == -ENOENT ? 0 : err; 331 } 332 333 static int dsa_slave_port_fdb_add(struct net_device *dev, 334 const struct switchdev_obj_port_fdb *fdb, 335 struct switchdev_trans *trans) 336 { 337 struct dsa_slave_priv *p = netdev_priv(dev); 338 struct dsa_switch *ds = p->parent; 339 int ret; 340 341 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add) 342 return -EOPNOTSUPP; 343 344 if (switchdev_trans_ph_prepare(trans)) 345 ret = ds->drv->port_fdb_prepare(ds, p->port, fdb, trans); 346 else 347 ret = ds->drv->port_fdb_add(ds, p->port, fdb, trans); 348 349 return ret; 350 } 351 352 static int dsa_slave_port_fdb_del(struct net_device *dev, 353 const struct switchdev_obj_port_fdb *fdb) 354 { 355 struct dsa_slave_priv *p = netdev_priv(dev); 356 struct dsa_switch *ds = p->parent; 357 int ret = -EOPNOTSUPP; 358 359 if (ds->drv->port_fdb_del) 360 ret = ds->drv->port_fdb_del(ds, p->port, fdb); 361 362 return ret; 363 } 364 365 static int dsa_slave_port_fdb_dump(struct net_device *dev, 366 struct switchdev_obj_port_fdb *fdb, 367 switchdev_obj_dump_cb_t *cb) 368 { 369 struct dsa_slave_priv *p = netdev_priv(dev); 370 struct dsa_switch *ds = p->parent; 371 372 if (ds->drv->port_fdb_dump) 373 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb); 374 375 return -EOPNOTSUPP; 376 } 377 378 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 379 { 380 struct dsa_slave_priv *p = netdev_priv(dev); 381 382 if (p->phy != NULL) 383 return phy_mii_ioctl(p->phy, ifr, cmd); 384 385 return -EOPNOTSUPP; 386 } 387 388 /* Return a bitmask of all ports being currently bridged within a given bridge 389 * device. Note that on leave, the mask will still return the bitmask of ports 390 * currently bridged, prior to port removal, and this is exactly what we want. 391 */ 392 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds, 393 struct net_device *bridge) 394 { 395 struct dsa_slave_priv *p; 396 unsigned int port; 397 u32 mask = 0; 398 399 for (port = 0; port < DSA_MAX_PORTS; port++) { 400 if (!dsa_is_port_initialized(ds, port)) 401 continue; 402 403 p = netdev_priv(ds->ports[port]); 404 405 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT && 406 p->bridge_dev == bridge) 407 mask |= 1 << port; 408 } 409 410 return mask; 411 } 412 413 static int dsa_slave_stp_update(struct net_device *dev, u8 state) 414 { 415 struct dsa_slave_priv *p = netdev_priv(dev); 416 struct dsa_switch *ds = p->parent; 417 int ret = -EOPNOTSUPP; 418 419 if (ds->drv->port_stp_update) 420 ret = ds->drv->port_stp_update(ds, p->port, state); 421 422 return ret; 423 } 424 425 static int dsa_slave_port_attr_set(struct net_device *dev, 426 const struct switchdev_attr *attr, 427 struct switchdev_trans *trans) 428 { 429 struct dsa_slave_priv *p = netdev_priv(dev); 430 struct dsa_switch *ds = p->parent; 431 int ret; 432 433 switch (attr->id) { 434 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 435 if (switchdev_trans_ph_prepare(trans)) 436 ret = ds->drv->port_stp_update ? 0 : -EOPNOTSUPP; 437 else 438 ret = ds->drv->port_stp_update(ds, p->port, 439 attr->u.stp_state); 440 break; 441 default: 442 ret = -EOPNOTSUPP; 443 break; 444 } 445 446 return ret; 447 } 448 449 static int dsa_slave_port_obj_add(struct net_device *dev, 450 const struct switchdev_obj *obj, 451 struct switchdev_trans *trans) 452 { 453 int err; 454 455 /* For the prepare phase, ensure the full set of changes is feasable in 456 * one go in order to signal a failure properly. If an operation is not 457 * supported, return -EOPNOTSUPP. 458 */ 459 460 switch (obj->id) { 461 case SWITCHDEV_OBJ_ID_PORT_FDB: 462 err = dsa_slave_port_fdb_add(dev, 463 SWITCHDEV_OBJ_PORT_FDB(obj), 464 trans); 465 break; 466 case SWITCHDEV_OBJ_ID_PORT_VLAN: 467 err = dsa_slave_port_vlan_add(dev, 468 SWITCHDEV_OBJ_PORT_VLAN(obj), 469 trans); 470 break; 471 default: 472 err = -EOPNOTSUPP; 473 break; 474 } 475 476 return err; 477 } 478 479 static int dsa_slave_port_obj_del(struct net_device *dev, 480 const struct switchdev_obj *obj) 481 { 482 int err; 483 484 switch (obj->id) { 485 case SWITCHDEV_OBJ_ID_PORT_FDB: 486 err = dsa_slave_port_fdb_del(dev, 487 SWITCHDEV_OBJ_PORT_FDB(obj)); 488 break; 489 case SWITCHDEV_OBJ_ID_PORT_VLAN: 490 err = dsa_slave_port_vlan_del(dev, 491 SWITCHDEV_OBJ_PORT_VLAN(obj)); 492 break; 493 default: 494 err = -EOPNOTSUPP; 495 break; 496 } 497 498 return err; 499 } 500 501 static int dsa_slave_port_obj_dump(struct net_device *dev, 502 struct switchdev_obj *obj, 503 switchdev_obj_dump_cb_t *cb) 504 { 505 int err; 506 507 switch (obj->id) { 508 case SWITCHDEV_OBJ_ID_PORT_FDB: 509 err = dsa_slave_port_fdb_dump(dev, 510 SWITCHDEV_OBJ_PORT_FDB(obj), 511 cb); 512 break; 513 case SWITCHDEV_OBJ_ID_PORT_VLAN: 514 err = dsa_slave_port_vlan_dump(dev, 515 SWITCHDEV_OBJ_PORT_VLAN(obj), 516 cb); 517 break; 518 default: 519 err = -EOPNOTSUPP; 520 break; 521 } 522 523 return err; 524 } 525 526 static int dsa_slave_bridge_port_join(struct net_device *dev, 527 struct net_device *br) 528 { 529 struct dsa_slave_priv *p = netdev_priv(dev); 530 struct dsa_switch *ds = p->parent; 531 int ret = -EOPNOTSUPP; 532 533 p->bridge_dev = br; 534 535 if (ds->drv->port_join_bridge) 536 ret = ds->drv->port_join_bridge(ds, p->port, 537 dsa_slave_br_port_mask(ds, br)); 538 539 return ret; 540 } 541 542 static int dsa_slave_bridge_port_leave(struct net_device *dev) 543 { 544 struct dsa_slave_priv *p = netdev_priv(dev); 545 struct dsa_switch *ds = p->parent; 546 int ret = -EOPNOTSUPP; 547 548 549 if (ds->drv->port_leave_bridge) 550 ret = ds->drv->port_leave_bridge(ds, p->port, 551 dsa_slave_br_port_mask(ds, p->bridge_dev)); 552 553 p->bridge_dev = NULL; 554 555 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 556 * so allow it to be in BR_STATE_FORWARDING to be kept functional 557 */ 558 dsa_slave_stp_update(dev, BR_STATE_FORWARDING); 559 560 return ret; 561 } 562 563 static int dsa_slave_port_attr_get(struct net_device *dev, 564 struct switchdev_attr *attr) 565 { 566 struct dsa_slave_priv *p = netdev_priv(dev); 567 struct dsa_switch *ds = p->parent; 568 569 switch (attr->id) { 570 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: 571 attr->u.ppid.id_len = sizeof(ds->index); 572 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len); 573 break; 574 default: 575 return -EOPNOTSUPP; 576 } 577 578 return 0; 579 } 580 581 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p, 582 struct sk_buff *skb) 583 { 584 #ifdef CONFIG_NET_POLL_CONTROLLER 585 if (p->netpoll) 586 netpoll_send_skb(p->netpoll, skb); 587 #else 588 BUG(); 589 #endif 590 return NETDEV_TX_OK; 591 } 592 593 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 594 { 595 struct dsa_slave_priv *p = netdev_priv(dev); 596 struct sk_buff *nskb; 597 598 dev->stats.tx_packets++; 599 dev->stats.tx_bytes += skb->len; 600 601 /* Transmit function may have to reallocate the original SKB */ 602 nskb = p->xmit(skb, dev); 603 if (!nskb) 604 return NETDEV_TX_OK; 605 606 /* SKB for netpoll still need to be mangled with the protocol-specific 607 * tag to be successfully transmitted 608 */ 609 if (unlikely(netpoll_tx_running(dev))) 610 return dsa_netpoll_send_skb(p, nskb); 611 612 /* Queue the SKB for transmission on the parent interface, but 613 * do not modify its EtherType 614 */ 615 nskb->dev = p->parent->dst->master_netdev; 616 dev_queue_xmit(nskb); 617 618 return NETDEV_TX_OK; 619 } 620 621 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb, 622 struct net_device *dev) 623 { 624 /* Just return the original SKB */ 625 return skb; 626 } 627 628 629 /* ethtool operations *******************************************************/ 630 static int 631 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 632 { 633 struct dsa_slave_priv *p = netdev_priv(dev); 634 int err; 635 636 err = -EOPNOTSUPP; 637 if (p->phy != NULL) { 638 err = phy_read_status(p->phy); 639 if (err == 0) 640 err = phy_ethtool_gset(p->phy, cmd); 641 } 642 643 return err; 644 } 645 646 static int 647 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 648 { 649 struct dsa_slave_priv *p = netdev_priv(dev); 650 651 if (p->phy != NULL) 652 return phy_ethtool_sset(p->phy, cmd); 653 654 return -EOPNOTSUPP; 655 } 656 657 static void dsa_slave_get_drvinfo(struct net_device *dev, 658 struct ethtool_drvinfo *drvinfo) 659 { 660 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 661 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version)); 662 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 663 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 664 } 665 666 static int dsa_slave_get_regs_len(struct net_device *dev) 667 { 668 struct dsa_slave_priv *p = netdev_priv(dev); 669 struct dsa_switch *ds = p->parent; 670 671 if (ds->drv->get_regs_len) 672 return ds->drv->get_regs_len(ds, p->port); 673 674 return -EOPNOTSUPP; 675 } 676 677 static void 678 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 679 { 680 struct dsa_slave_priv *p = netdev_priv(dev); 681 struct dsa_switch *ds = p->parent; 682 683 if (ds->drv->get_regs) 684 ds->drv->get_regs(ds, p->port, regs, _p); 685 } 686 687 static int dsa_slave_nway_reset(struct net_device *dev) 688 { 689 struct dsa_slave_priv *p = netdev_priv(dev); 690 691 if (p->phy != NULL) 692 return genphy_restart_aneg(p->phy); 693 694 return -EOPNOTSUPP; 695 } 696 697 static u32 dsa_slave_get_link(struct net_device *dev) 698 { 699 struct dsa_slave_priv *p = netdev_priv(dev); 700 701 if (p->phy != NULL) { 702 genphy_update_link(p->phy); 703 return p->phy->link; 704 } 705 706 return -EOPNOTSUPP; 707 } 708 709 static int dsa_slave_get_eeprom_len(struct net_device *dev) 710 { 711 struct dsa_slave_priv *p = netdev_priv(dev); 712 struct dsa_switch *ds = p->parent; 713 714 if (ds->pd->eeprom_len) 715 return ds->pd->eeprom_len; 716 717 if (ds->drv->get_eeprom_len) 718 return ds->drv->get_eeprom_len(ds); 719 720 return 0; 721 } 722 723 static int dsa_slave_get_eeprom(struct net_device *dev, 724 struct ethtool_eeprom *eeprom, u8 *data) 725 { 726 struct dsa_slave_priv *p = netdev_priv(dev); 727 struct dsa_switch *ds = p->parent; 728 729 if (ds->drv->get_eeprom) 730 return ds->drv->get_eeprom(ds, eeprom, data); 731 732 return -EOPNOTSUPP; 733 } 734 735 static int dsa_slave_set_eeprom(struct net_device *dev, 736 struct ethtool_eeprom *eeprom, u8 *data) 737 { 738 struct dsa_slave_priv *p = netdev_priv(dev); 739 struct dsa_switch *ds = p->parent; 740 741 if (ds->drv->set_eeprom) 742 return ds->drv->set_eeprom(ds, eeprom, data); 743 744 return -EOPNOTSUPP; 745 } 746 747 static void dsa_slave_get_strings(struct net_device *dev, 748 uint32_t stringset, uint8_t *data) 749 { 750 struct dsa_slave_priv *p = netdev_priv(dev); 751 struct dsa_switch *ds = p->parent; 752 753 if (stringset == ETH_SS_STATS) { 754 int len = ETH_GSTRING_LEN; 755 756 strncpy(data, "tx_packets", len); 757 strncpy(data + len, "tx_bytes", len); 758 strncpy(data + 2 * len, "rx_packets", len); 759 strncpy(data + 3 * len, "rx_bytes", len); 760 if (ds->drv->get_strings != NULL) 761 ds->drv->get_strings(ds, p->port, data + 4 * len); 762 } 763 } 764 765 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 766 struct ethtool_stats *stats, 767 uint64_t *data) 768 { 769 struct dsa_slave_priv *p = netdev_priv(dev); 770 struct dsa_switch *ds = p->parent; 771 772 data[0] = p->dev->stats.tx_packets; 773 data[1] = p->dev->stats.tx_bytes; 774 data[2] = p->dev->stats.rx_packets; 775 data[3] = p->dev->stats.rx_bytes; 776 if (ds->drv->get_ethtool_stats != NULL) 777 ds->drv->get_ethtool_stats(ds, p->port, data + 4); 778 } 779 780 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 781 { 782 struct dsa_slave_priv *p = netdev_priv(dev); 783 struct dsa_switch *ds = p->parent; 784 785 if (sset == ETH_SS_STATS) { 786 int count; 787 788 count = 4; 789 if (ds->drv->get_sset_count != NULL) 790 count += ds->drv->get_sset_count(ds); 791 792 return count; 793 } 794 795 return -EOPNOTSUPP; 796 } 797 798 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 799 { 800 struct dsa_slave_priv *p = netdev_priv(dev); 801 struct dsa_switch *ds = p->parent; 802 803 if (ds->drv->get_wol) 804 ds->drv->get_wol(ds, p->port, w); 805 } 806 807 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 808 { 809 struct dsa_slave_priv *p = netdev_priv(dev); 810 struct dsa_switch *ds = p->parent; 811 int ret = -EOPNOTSUPP; 812 813 if (ds->drv->set_wol) 814 ret = ds->drv->set_wol(ds, p->port, w); 815 816 return ret; 817 } 818 819 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 820 { 821 struct dsa_slave_priv *p = netdev_priv(dev); 822 struct dsa_switch *ds = p->parent; 823 int ret; 824 825 if (!ds->drv->set_eee) 826 return -EOPNOTSUPP; 827 828 ret = ds->drv->set_eee(ds, p->port, p->phy, e); 829 if (ret) 830 return ret; 831 832 if (p->phy) 833 ret = phy_ethtool_set_eee(p->phy, e); 834 835 return ret; 836 } 837 838 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 839 { 840 struct dsa_slave_priv *p = netdev_priv(dev); 841 struct dsa_switch *ds = p->parent; 842 int ret; 843 844 if (!ds->drv->get_eee) 845 return -EOPNOTSUPP; 846 847 ret = ds->drv->get_eee(ds, p->port, e); 848 if (ret) 849 return ret; 850 851 if (p->phy) 852 ret = phy_ethtool_get_eee(p->phy, e); 853 854 return ret; 855 } 856 857 #ifdef CONFIG_NET_POLL_CONTROLLER 858 static int dsa_slave_netpoll_setup(struct net_device *dev, 859 struct netpoll_info *ni) 860 { 861 struct dsa_slave_priv *p = netdev_priv(dev); 862 struct dsa_switch *ds = p->parent; 863 struct net_device *master = ds->dst->master_netdev; 864 struct netpoll *netpoll; 865 int err = 0; 866 867 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 868 if (!netpoll) 869 return -ENOMEM; 870 871 err = __netpoll_setup(netpoll, master); 872 if (err) { 873 kfree(netpoll); 874 goto out; 875 } 876 877 p->netpoll = netpoll; 878 out: 879 return err; 880 } 881 882 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 883 { 884 struct dsa_slave_priv *p = netdev_priv(dev); 885 struct netpoll *netpoll = p->netpoll; 886 887 if (!netpoll) 888 return; 889 890 p->netpoll = NULL; 891 892 __netpoll_free_async(netpoll); 893 } 894 895 static void dsa_slave_poll_controller(struct net_device *dev) 896 { 897 } 898 #endif 899 900 static const struct ethtool_ops dsa_slave_ethtool_ops = { 901 .get_settings = dsa_slave_get_settings, 902 .set_settings = dsa_slave_set_settings, 903 .get_drvinfo = dsa_slave_get_drvinfo, 904 .get_regs_len = dsa_slave_get_regs_len, 905 .get_regs = dsa_slave_get_regs, 906 .nway_reset = dsa_slave_nway_reset, 907 .get_link = dsa_slave_get_link, 908 .get_eeprom_len = dsa_slave_get_eeprom_len, 909 .get_eeprom = dsa_slave_get_eeprom, 910 .set_eeprom = dsa_slave_set_eeprom, 911 .get_strings = dsa_slave_get_strings, 912 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 913 .get_sset_count = dsa_slave_get_sset_count, 914 .set_wol = dsa_slave_set_wol, 915 .get_wol = dsa_slave_get_wol, 916 .set_eee = dsa_slave_set_eee, 917 .get_eee = dsa_slave_get_eee, 918 }; 919 920 static const struct net_device_ops dsa_slave_netdev_ops = { 921 .ndo_open = dsa_slave_open, 922 .ndo_stop = dsa_slave_close, 923 .ndo_start_xmit = dsa_slave_xmit, 924 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 925 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 926 .ndo_set_mac_address = dsa_slave_set_mac_address, 927 .ndo_fdb_add = switchdev_port_fdb_add, 928 .ndo_fdb_del = switchdev_port_fdb_del, 929 .ndo_fdb_dump = switchdev_port_fdb_dump, 930 .ndo_do_ioctl = dsa_slave_ioctl, 931 .ndo_get_iflink = dsa_slave_get_iflink, 932 #ifdef CONFIG_NET_POLL_CONTROLLER 933 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 934 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 935 .ndo_poll_controller = dsa_slave_poll_controller, 936 #endif 937 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 938 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 939 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 940 }; 941 942 static const struct switchdev_ops dsa_slave_switchdev_ops = { 943 .switchdev_port_attr_get = dsa_slave_port_attr_get, 944 .switchdev_port_attr_set = dsa_slave_port_attr_set, 945 .switchdev_port_obj_add = dsa_slave_port_obj_add, 946 .switchdev_port_obj_del = dsa_slave_port_obj_del, 947 .switchdev_port_obj_dump = dsa_slave_port_obj_dump, 948 }; 949 950 static struct device_type dsa_type = { 951 .name = "dsa", 952 }; 953 954 static void dsa_slave_adjust_link(struct net_device *dev) 955 { 956 struct dsa_slave_priv *p = netdev_priv(dev); 957 struct dsa_switch *ds = p->parent; 958 unsigned int status_changed = 0; 959 960 if (p->old_link != p->phy->link) { 961 status_changed = 1; 962 p->old_link = p->phy->link; 963 } 964 965 if (p->old_duplex != p->phy->duplex) { 966 status_changed = 1; 967 p->old_duplex = p->phy->duplex; 968 } 969 970 if (p->old_pause != p->phy->pause) { 971 status_changed = 1; 972 p->old_pause = p->phy->pause; 973 } 974 975 if (ds->drv->adjust_link && status_changed) 976 ds->drv->adjust_link(ds, p->port, p->phy); 977 978 if (status_changed) 979 phy_print_status(p->phy); 980 } 981 982 static int dsa_slave_fixed_link_update(struct net_device *dev, 983 struct fixed_phy_status *status) 984 { 985 struct dsa_slave_priv *p = netdev_priv(dev); 986 struct dsa_switch *ds = p->parent; 987 988 if (ds->drv->fixed_link_update) 989 ds->drv->fixed_link_update(ds, p->port, status); 990 991 return 0; 992 } 993 994 /* slave device setup *******************************************************/ 995 static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 996 struct net_device *slave_dev, 997 int addr) 998 { 999 struct dsa_switch *ds = p->parent; 1000 1001 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr); 1002 if (!p->phy) { 1003 netdev_err(slave_dev, "no phy at %d\n", addr); 1004 return -ENODEV; 1005 } 1006 1007 /* Use already configured phy mode */ 1008 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1009 p->phy_interface = p->phy->interface; 1010 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 1011 p->phy_interface); 1012 1013 return 0; 1014 } 1015 1016 static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 1017 struct net_device *slave_dev) 1018 { 1019 struct dsa_switch *ds = p->parent; 1020 struct dsa_chip_data *cd = ds->pd; 1021 struct device_node *phy_dn, *port_dn; 1022 bool phy_is_fixed = false; 1023 u32 phy_flags = 0; 1024 int mode, ret; 1025 1026 port_dn = cd->port_dn[p->port]; 1027 mode = of_get_phy_mode(port_dn); 1028 if (mode < 0) 1029 mode = PHY_INTERFACE_MODE_NA; 1030 p->phy_interface = mode; 1031 1032 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1033 if (of_phy_is_fixed_link(port_dn)) { 1034 /* In the case of a fixed PHY, the DT node associated 1035 * to the fixed PHY is the Port DT node 1036 */ 1037 ret = of_phy_register_fixed_link(port_dn); 1038 if (ret) { 1039 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1040 return ret; 1041 } 1042 phy_is_fixed = true; 1043 phy_dn = port_dn; 1044 } 1045 1046 if (ds->drv->get_phy_flags) 1047 phy_flags = ds->drv->get_phy_flags(ds, p->port); 1048 1049 if (phy_dn) { 1050 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 1051 1052 /* If this PHY address is part of phys_mii_mask, which means 1053 * that we need to divert reads and writes to/from it, then we 1054 * want to bind this device using the slave MII bus created by 1055 * DSA to make that happen. 1056 */ 1057 if (!phy_is_fixed && phy_id >= 0 && 1058 (ds->phys_mii_mask & (1 << phy_id))) { 1059 ret = dsa_slave_phy_connect(p, slave_dev, phy_id); 1060 if (ret) { 1061 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); 1062 return ret; 1063 } 1064 } else { 1065 p->phy = of_phy_connect(slave_dev, phy_dn, 1066 dsa_slave_adjust_link, 1067 phy_flags, 1068 p->phy_interface); 1069 } 1070 } 1071 1072 if (p->phy && phy_is_fixed) 1073 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 1074 1075 /* We could not connect to a designated PHY, so use the switch internal 1076 * MDIO bus instead 1077 */ 1078 if (!p->phy) { 1079 ret = dsa_slave_phy_connect(p, slave_dev, p->port); 1080 if (ret) { 1081 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret); 1082 return ret; 1083 } 1084 } 1085 1086 phy_attached_info(p->phy); 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 ds->ports[port] = slave_dev; 1193 ret = register_netdev(slave_dev); 1194 if (ret) { 1195 netdev_err(master, "error %d registering interface %s\n", 1196 ret, slave_dev->name); 1197 phy_disconnect(p->phy); 1198 ds->ports[port] = NULL; 1199 free_netdev(slave_dev); 1200 return ret; 1201 } 1202 1203 netif_carrier_off(slave_dev); 1204 1205 ret = dsa_slave_phy_setup(p, slave_dev); 1206 if (ret) { 1207 netdev_err(master, "error %d setting up slave phy\n", ret); 1208 free_netdev(slave_dev); 1209 return ret; 1210 } 1211 1212 return 0; 1213 } 1214 1215 void dsa_slave_destroy(struct net_device *slave_dev) 1216 { 1217 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1218 1219 netif_carrier_off(slave_dev); 1220 if (p->phy) 1221 phy_disconnect(p->phy); 1222 unregister_netdev(slave_dev); 1223 free_netdev(slave_dev); 1224 } 1225 1226 static bool dsa_slave_dev_check(struct net_device *dev) 1227 { 1228 return dev->netdev_ops == &dsa_slave_netdev_ops; 1229 } 1230 1231 static int dsa_slave_master_changed(struct net_device *dev) 1232 { 1233 struct net_device *master = netdev_master_upper_dev_get(dev); 1234 struct dsa_slave_priv *p = netdev_priv(dev); 1235 int err = 0; 1236 1237 if (master && master->rtnl_link_ops && 1238 !strcmp(master->rtnl_link_ops->kind, "bridge")) 1239 err = dsa_slave_bridge_port_join(dev, master); 1240 else if (dsa_port_is_bridged(p)) 1241 err = dsa_slave_bridge_port_leave(dev); 1242 1243 return err; 1244 } 1245 1246 int dsa_slave_netdevice_event(struct notifier_block *unused, 1247 unsigned long event, void *ptr) 1248 { 1249 struct net_device *dev; 1250 int err = 0; 1251 1252 switch (event) { 1253 case NETDEV_CHANGEUPPER: 1254 dev = netdev_notifier_info_to_dev(ptr); 1255 if (!dsa_slave_dev_check(dev)) 1256 goto out; 1257 1258 err = dsa_slave_master_changed(dev); 1259 if (err && err != -EOPNOTSUPP) 1260 netdev_warn(dev, "failed to reflect master change\n"); 1261 1262 break; 1263 } 1264 1265 out: 1266 return NOTIFY_DONE; 1267 } 1268