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 struct switchdev_obj *obj) 246 { 247 struct switchdev_obj_vlan *vlan = &obj->u.vlan; 248 struct dsa_slave_priv *p = netdev_priv(dev); 249 struct dsa_switch *ds = p->parent; 250 u16 vid; 251 int err; 252 253 switch (obj->trans) { 254 case SWITCHDEV_TRANS_PREPARE: 255 if (!ds->drv->port_vlan_add || !ds->drv->port_pvid_set) 256 return -EOPNOTSUPP; 257 258 /* If the requested port doesn't belong to the same bridge as 259 * the VLAN members, fallback to software VLAN (hopefully). 260 */ 261 err = dsa_bridge_check_vlan_range(ds, p->bridge_dev, 262 vlan->vid_begin, 263 vlan->vid_end); 264 if (err) 265 return err; 266 break; 267 case SWITCHDEV_TRANS_COMMIT: 268 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) { 269 err = ds->drv->port_vlan_add(ds, p->port, vid, 270 vlan->flags & 271 BRIDGE_VLAN_INFO_UNTAGGED); 272 if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID) 273 err = ds->drv->port_pvid_set(ds, p->port, vid); 274 if (err) 275 return err; 276 } 277 break; 278 default: 279 return -EOPNOTSUPP; 280 } 281 282 return 0; 283 } 284 285 static int dsa_slave_port_vlan_del(struct net_device *dev, 286 struct switchdev_obj *obj) 287 { 288 struct switchdev_obj_vlan *vlan = &obj->u.vlan; 289 struct dsa_slave_priv *p = netdev_priv(dev); 290 struct dsa_switch *ds = p->parent; 291 u16 vid; 292 int err; 293 294 if (!ds->drv->port_vlan_del) 295 return -EOPNOTSUPP; 296 297 for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) { 298 err = ds->drv->port_vlan_del(ds, p->port, vid); 299 if (err) 300 return err; 301 } 302 303 return 0; 304 } 305 306 static int dsa_slave_port_vlan_dump(struct net_device *dev, 307 struct switchdev_obj *obj) 308 { 309 struct switchdev_obj_vlan *vlan = &obj->u.vlan; 310 struct dsa_slave_priv *p = netdev_priv(dev); 311 struct dsa_switch *ds = p->parent; 312 DECLARE_BITMAP(members, DSA_MAX_PORTS); 313 DECLARE_BITMAP(untagged, DSA_MAX_PORTS); 314 u16 pvid, vid = 0; 315 int err; 316 317 if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get) 318 return -EOPNOTSUPP; 319 320 err = ds->drv->port_pvid_get(ds, p->port, &pvid); 321 if (err) 322 return err; 323 324 for (;;) { 325 err = ds->drv->vlan_getnext(ds, &vid, members, untagged); 326 if (err) 327 break; 328 329 if (!test_bit(p->port, members)) 330 continue; 331 332 memset(vlan, 0, sizeof(*vlan)); 333 vlan->vid_begin = vlan->vid_end = vid; 334 335 if (vid == pvid) 336 vlan->flags |= BRIDGE_VLAN_INFO_PVID; 337 338 if (test_bit(p->port, untagged)) 339 vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED; 340 341 err = obj->cb(dev, obj); 342 if (err) 343 break; 344 } 345 346 return err == -ENOENT ? 0 : err; 347 } 348 349 static int dsa_slave_port_fdb_add(struct net_device *dev, 350 struct switchdev_obj *obj) 351 { 352 struct switchdev_obj_fdb *fdb = &obj->u.fdb; 353 struct dsa_slave_priv *p = netdev_priv(dev); 354 struct dsa_switch *ds = p->parent; 355 int ret = -EOPNOTSUPP; 356 357 if (obj->trans == SWITCHDEV_TRANS_PREPARE) 358 ret = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP; 359 else if (obj->trans == SWITCHDEV_TRANS_COMMIT) 360 ret = ds->drv->port_fdb_add(ds, p->port, fdb->addr, fdb->vid); 361 362 return ret; 363 } 364 365 static int dsa_slave_port_fdb_del(struct net_device *dev, 366 struct switchdev_obj *obj) 367 { 368 struct switchdev_obj_fdb *fdb = &obj->u.fdb; 369 struct dsa_slave_priv *p = netdev_priv(dev); 370 struct dsa_switch *ds = p->parent; 371 int ret = -EOPNOTSUPP; 372 373 if (ds->drv->port_fdb_del) 374 ret = ds->drv->port_fdb_del(ds, p->port, fdb->addr, fdb->vid); 375 376 return ret; 377 } 378 379 static int dsa_slave_port_fdb_dump(struct net_device *dev, 380 struct switchdev_obj *obj) 381 { 382 struct dsa_slave_priv *p = netdev_priv(dev); 383 struct dsa_switch *ds = p->parent; 384 unsigned char addr[ETH_ALEN] = { 0 }; 385 u16 vid = 0; 386 int ret; 387 388 if (!ds->drv->port_fdb_getnext) 389 return -EOPNOTSUPP; 390 391 for (;;) { 392 bool is_static; 393 394 ret = ds->drv->port_fdb_getnext(ds, p->port, addr, &vid, 395 &is_static); 396 if (ret < 0) 397 break; 398 399 obj->u.fdb.addr = addr; 400 obj->u.fdb.vid = vid; 401 obj->u.fdb.ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 402 403 ret = obj->cb(dev, obj); 404 if (ret < 0) 405 break; 406 } 407 408 return ret == -ENOENT ? 0 : ret; 409 } 410 411 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 412 { 413 struct dsa_slave_priv *p = netdev_priv(dev); 414 415 if (p->phy != NULL) 416 return phy_mii_ioctl(p->phy, ifr, cmd); 417 418 return -EOPNOTSUPP; 419 } 420 421 /* Return a bitmask of all ports being currently bridged within a given bridge 422 * device. Note that on leave, the mask will still return the bitmask of ports 423 * currently bridged, prior to port removal, and this is exactly what we want. 424 */ 425 static u32 dsa_slave_br_port_mask(struct dsa_switch *ds, 426 struct net_device *bridge) 427 { 428 struct dsa_slave_priv *p; 429 unsigned int port; 430 u32 mask = 0; 431 432 for (port = 0; port < DSA_MAX_PORTS; port++) { 433 if (!dsa_is_port_initialized(ds, port)) 434 continue; 435 436 p = netdev_priv(ds->ports[port]); 437 438 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT && 439 p->bridge_dev == bridge) 440 mask |= 1 << port; 441 } 442 443 return mask; 444 } 445 446 static int dsa_slave_stp_update(struct net_device *dev, u8 state) 447 { 448 struct dsa_slave_priv *p = netdev_priv(dev); 449 struct dsa_switch *ds = p->parent; 450 int ret = -EOPNOTSUPP; 451 452 if (ds->drv->port_stp_update) 453 ret = ds->drv->port_stp_update(ds, p->port, state); 454 455 return ret; 456 } 457 458 static int dsa_slave_port_attr_set(struct net_device *dev, 459 struct switchdev_attr *attr) 460 { 461 int ret = 0; 462 463 switch (attr->id) { 464 case SWITCHDEV_ATTR_PORT_STP_STATE: 465 if (attr->trans == SWITCHDEV_TRANS_COMMIT) 466 ret = dsa_slave_stp_update(dev, attr->u.stp_state); 467 break; 468 default: 469 ret = -EOPNOTSUPP; 470 break; 471 } 472 473 return ret; 474 } 475 476 static int dsa_slave_port_obj_add(struct net_device *dev, 477 struct switchdev_obj *obj) 478 { 479 int err; 480 481 /* For the prepare phase, ensure the full set of changes is feasable in 482 * one go in order to signal a failure properly. If an operation is not 483 * supported, return -EOPNOTSUPP. 484 */ 485 486 switch (obj->id) { 487 case SWITCHDEV_OBJ_PORT_FDB: 488 err = dsa_slave_port_fdb_add(dev, obj); 489 break; 490 case SWITCHDEV_OBJ_PORT_VLAN: 491 err = dsa_slave_port_vlan_add(dev, obj); 492 break; 493 default: 494 err = -EOPNOTSUPP; 495 break; 496 } 497 498 return err; 499 } 500 501 static int dsa_slave_port_obj_del(struct net_device *dev, 502 struct switchdev_obj *obj) 503 { 504 int err; 505 506 switch (obj->id) { 507 case SWITCHDEV_OBJ_PORT_FDB: 508 err = dsa_slave_port_fdb_del(dev, obj); 509 break; 510 case SWITCHDEV_OBJ_PORT_VLAN: 511 err = dsa_slave_port_vlan_del(dev, obj); 512 break; 513 default: 514 err = -EOPNOTSUPP; 515 break; 516 } 517 518 return err; 519 } 520 521 static int dsa_slave_port_obj_dump(struct net_device *dev, 522 struct switchdev_obj *obj) 523 { 524 int err; 525 526 switch (obj->id) { 527 case SWITCHDEV_OBJ_PORT_FDB: 528 err = dsa_slave_port_fdb_dump(dev, obj); 529 break; 530 case SWITCHDEV_OBJ_PORT_VLAN: 531 err = dsa_slave_port_vlan_dump(dev, obj); 532 break; 533 default: 534 err = -EOPNOTSUPP; 535 break; 536 } 537 538 return err; 539 } 540 541 static int dsa_slave_bridge_port_join(struct net_device *dev, 542 struct net_device *br) 543 { 544 struct dsa_slave_priv *p = netdev_priv(dev); 545 struct dsa_switch *ds = p->parent; 546 int ret = -EOPNOTSUPP; 547 548 p->bridge_dev = br; 549 550 if (ds->drv->port_join_bridge) 551 ret = ds->drv->port_join_bridge(ds, p->port, 552 dsa_slave_br_port_mask(ds, br)); 553 554 return ret; 555 } 556 557 static int dsa_slave_bridge_port_leave(struct net_device *dev) 558 { 559 struct dsa_slave_priv *p = netdev_priv(dev); 560 struct dsa_switch *ds = p->parent; 561 int ret = -EOPNOTSUPP; 562 563 564 if (ds->drv->port_leave_bridge) 565 ret = ds->drv->port_leave_bridge(ds, p->port, 566 dsa_slave_br_port_mask(ds, p->bridge_dev)); 567 568 p->bridge_dev = NULL; 569 570 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 571 * so allow it to be in BR_STATE_FORWARDING to be kept functional 572 */ 573 dsa_slave_stp_update(dev, BR_STATE_FORWARDING); 574 575 return ret; 576 } 577 578 static int dsa_slave_port_attr_get(struct net_device *dev, 579 struct switchdev_attr *attr) 580 { 581 struct dsa_slave_priv *p = netdev_priv(dev); 582 struct dsa_switch *ds = p->parent; 583 584 switch (attr->id) { 585 case SWITCHDEV_ATTR_PORT_PARENT_ID: 586 attr->u.ppid.id_len = sizeof(ds->index); 587 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len); 588 break; 589 default: 590 return -EOPNOTSUPP; 591 } 592 593 return 0; 594 } 595 596 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p, 597 struct sk_buff *skb) 598 { 599 #ifdef CONFIG_NET_POLL_CONTROLLER 600 if (p->netpoll) 601 netpoll_send_skb(p->netpoll, skb); 602 #else 603 BUG(); 604 #endif 605 return NETDEV_TX_OK; 606 } 607 608 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 609 { 610 struct dsa_slave_priv *p = netdev_priv(dev); 611 struct sk_buff *nskb; 612 613 dev->stats.tx_packets++; 614 dev->stats.tx_bytes += skb->len; 615 616 /* Transmit function may have to reallocate the original SKB */ 617 nskb = p->xmit(skb, dev); 618 if (!nskb) 619 return NETDEV_TX_OK; 620 621 /* SKB for netpoll still need to be mangled with the protocol-specific 622 * tag to be successfully transmitted 623 */ 624 if (unlikely(netpoll_tx_running(dev))) 625 return dsa_netpoll_send_skb(p, nskb); 626 627 /* Queue the SKB for transmission on the parent interface, but 628 * do not modify its EtherType 629 */ 630 nskb->dev = p->parent->dst->master_netdev; 631 dev_queue_xmit(nskb); 632 633 return NETDEV_TX_OK; 634 } 635 636 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb, 637 struct net_device *dev) 638 { 639 /* Just return the original SKB */ 640 return skb; 641 } 642 643 644 /* ethtool operations *******************************************************/ 645 static int 646 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 647 { 648 struct dsa_slave_priv *p = netdev_priv(dev); 649 int err; 650 651 err = -EOPNOTSUPP; 652 if (p->phy != NULL) { 653 err = phy_read_status(p->phy); 654 if (err == 0) 655 err = phy_ethtool_gset(p->phy, cmd); 656 } 657 658 return err; 659 } 660 661 static int 662 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 663 { 664 struct dsa_slave_priv *p = netdev_priv(dev); 665 666 if (p->phy != NULL) 667 return phy_ethtool_sset(p->phy, cmd); 668 669 return -EOPNOTSUPP; 670 } 671 672 static void dsa_slave_get_drvinfo(struct net_device *dev, 673 struct ethtool_drvinfo *drvinfo) 674 { 675 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 676 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version)); 677 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 678 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 679 } 680 681 static int dsa_slave_get_regs_len(struct net_device *dev) 682 { 683 struct dsa_slave_priv *p = netdev_priv(dev); 684 struct dsa_switch *ds = p->parent; 685 686 if (ds->drv->get_regs_len) 687 return ds->drv->get_regs_len(ds, p->port); 688 689 return -EOPNOTSUPP; 690 } 691 692 static void 693 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 694 { 695 struct dsa_slave_priv *p = netdev_priv(dev); 696 struct dsa_switch *ds = p->parent; 697 698 if (ds->drv->get_regs) 699 ds->drv->get_regs(ds, p->port, regs, _p); 700 } 701 702 static int dsa_slave_nway_reset(struct net_device *dev) 703 { 704 struct dsa_slave_priv *p = netdev_priv(dev); 705 706 if (p->phy != NULL) 707 return genphy_restart_aneg(p->phy); 708 709 return -EOPNOTSUPP; 710 } 711 712 static u32 dsa_slave_get_link(struct net_device *dev) 713 { 714 struct dsa_slave_priv *p = netdev_priv(dev); 715 716 if (p->phy != NULL) { 717 genphy_update_link(p->phy); 718 return p->phy->link; 719 } 720 721 return -EOPNOTSUPP; 722 } 723 724 static int dsa_slave_get_eeprom_len(struct net_device *dev) 725 { 726 struct dsa_slave_priv *p = netdev_priv(dev); 727 struct dsa_switch *ds = p->parent; 728 729 if (ds->pd->eeprom_len) 730 return ds->pd->eeprom_len; 731 732 if (ds->drv->get_eeprom_len) 733 return ds->drv->get_eeprom_len(ds); 734 735 return 0; 736 } 737 738 static int dsa_slave_get_eeprom(struct net_device *dev, 739 struct ethtool_eeprom *eeprom, u8 *data) 740 { 741 struct dsa_slave_priv *p = netdev_priv(dev); 742 struct dsa_switch *ds = p->parent; 743 744 if (ds->drv->get_eeprom) 745 return ds->drv->get_eeprom(ds, eeprom, data); 746 747 return -EOPNOTSUPP; 748 } 749 750 static int dsa_slave_set_eeprom(struct net_device *dev, 751 struct ethtool_eeprom *eeprom, u8 *data) 752 { 753 struct dsa_slave_priv *p = netdev_priv(dev); 754 struct dsa_switch *ds = p->parent; 755 756 if (ds->drv->set_eeprom) 757 return ds->drv->set_eeprom(ds, eeprom, data); 758 759 return -EOPNOTSUPP; 760 } 761 762 static void dsa_slave_get_strings(struct net_device *dev, 763 uint32_t stringset, uint8_t *data) 764 { 765 struct dsa_slave_priv *p = netdev_priv(dev); 766 struct dsa_switch *ds = p->parent; 767 768 if (stringset == ETH_SS_STATS) { 769 int len = ETH_GSTRING_LEN; 770 771 strncpy(data, "tx_packets", len); 772 strncpy(data + len, "tx_bytes", len); 773 strncpy(data + 2 * len, "rx_packets", len); 774 strncpy(data + 3 * len, "rx_bytes", len); 775 if (ds->drv->get_strings != NULL) 776 ds->drv->get_strings(ds, p->port, data + 4 * len); 777 } 778 } 779 780 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 781 struct ethtool_stats *stats, 782 uint64_t *data) 783 { 784 struct dsa_slave_priv *p = netdev_priv(dev); 785 struct dsa_switch *ds = p->parent; 786 787 data[0] = p->dev->stats.tx_packets; 788 data[1] = p->dev->stats.tx_bytes; 789 data[2] = p->dev->stats.rx_packets; 790 data[3] = p->dev->stats.rx_bytes; 791 if (ds->drv->get_ethtool_stats != NULL) 792 ds->drv->get_ethtool_stats(ds, p->port, data + 4); 793 } 794 795 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 796 { 797 struct dsa_slave_priv *p = netdev_priv(dev); 798 struct dsa_switch *ds = p->parent; 799 800 if (sset == ETH_SS_STATS) { 801 int count; 802 803 count = 4; 804 if (ds->drv->get_sset_count != NULL) 805 count += ds->drv->get_sset_count(ds); 806 807 return count; 808 } 809 810 return -EOPNOTSUPP; 811 } 812 813 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 814 { 815 struct dsa_slave_priv *p = netdev_priv(dev); 816 struct dsa_switch *ds = p->parent; 817 818 if (ds->drv->get_wol) 819 ds->drv->get_wol(ds, p->port, w); 820 } 821 822 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 823 { 824 struct dsa_slave_priv *p = netdev_priv(dev); 825 struct dsa_switch *ds = p->parent; 826 int ret = -EOPNOTSUPP; 827 828 if (ds->drv->set_wol) 829 ret = ds->drv->set_wol(ds, p->port, w); 830 831 return ret; 832 } 833 834 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 835 { 836 struct dsa_slave_priv *p = netdev_priv(dev); 837 struct dsa_switch *ds = p->parent; 838 int ret; 839 840 if (!ds->drv->set_eee) 841 return -EOPNOTSUPP; 842 843 ret = ds->drv->set_eee(ds, p->port, p->phy, e); 844 if (ret) 845 return ret; 846 847 if (p->phy) 848 ret = phy_ethtool_set_eee(p->phy, e); 849 850 return ret; 851 } 852 853 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 854 { 855 struct dsa_slave_priv *p = netdev_priv(dev); 856 struct dsa_switch *ds = p->parent; 857 int ret; 858 859 if (!ds->drv->get_eee) 860 return -EOPNOTSUPP; 861 862 ret = ds->drv->get_eee(ds, p->port, e); 863 if (ret) 864 return ret; 865 866 if (p->phy) 867 ret = phy_ethtool_get_eee(p->phy, e); 868 869 return ret; 870 } 871 872 #ifdef CONFIG_NET_POLL_CONTROLLER 873 static int dsa_slave_netpoll_setup(struct net_device *dev, 874 struct netpoll_info *ni) 875 { 876 struct dsa_slave_priv *p = netdev_priv(dev); 877 struct dsa_switch *ds = p->parent; 878 struct net_device *master = ds->dst->master_netdev; 879 struct netpoll *netpoll; 880 int err = 0; 881 882 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 883 if (!netpoll) 884 return -ENOMEM; 885 886 err = __netpoll_setup(netpoll, master); 887 if (err) { 888 kfree(netpoll); 889 goto out; 890 } 891 892 p->netpoll = netpoll; 893 out: 894 return err; 895 } 896 897 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 898 { 899 struct dsa_slave_priv *p = netdev_priv(dev); 900 struct netpoll *netpoll = p->netpoll; 901 902 if (!netpoll) 903 return; 904 905 p->netpoll = NULL; 906 907 __netpoll_free_async(netpoll); 908 } 909 910 static void dsa_slave_poll_controller(struct net_device *dev) 911 { 912 } 913 #endif 914 915 static const struct ethtool_ops dsa_slave_ethtool_ops = { 916 .get_settings = dsa_slave_get_settings, 917 .set_settings = dsa_slave_set_settings, 918 .get_drvinfo = dsa_slave_get_drvinfo, 919 .get_regs_len = dsa_slave_get_regs_len, 920 .get_regs = dsa_slave_get_regs, 921 .nway_reset = dsa_slave_nway_reset, 922 .get_link = dsa_slave_get_link, 923 .get_eeprom_len = dsa_slave_get_eeprom_len, 924 .get_eeprom = dsa_slave_get_eeprom, 925 .set_eeprom = dsa_slave_set_eeprom, 926 .get_strings = dsa_slave_get_strings, 927 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 928 .get_sset_count = dsa_slave_get_sset_count, 929 .set_wol = dsa_slave_set_wol, 930 .get_wol = dsa_slave_get_wol, 931 .set_eee = dsa_slave_set_eee, 932 .get_eee = dsa_slave_get_eee, 933 }; 934 935 static const struct net_device_ops dsa_slave_netdev_ops = { 936 .ndo_open = dsa_slave_open, 937 .ndo_stop = dsa_slave_close, 938 .ndo_start_xmit = dsa_slave_xmit, 939 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 940 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 941 .ndo_set_mac_address = dsa_slave_set_mac_address, 942 .ndo_fdb_add = switchdev_port_fdb_add, 943 .ndo_fdb_del = switchdev_port_fdb_del, 944 .ndo_fdb_dump = switchdev_port_fdb_dump, 945 .ndo_do_ioctl = dsa_slave_ioctl, 946 .ndo_get_iflink = dsa_slave_get_iflink, 947 #ifdef CONFIG_NET_POLL_CONTROLLER 948 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 949 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 950 .ndo_poll_controller = dsa_slave_poll_controller, 951 #endif 952 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 953 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 954 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 955 }; 956 957 static const struct switchdev_ops dsa_slave_switchdev_ops = { 958 .switchdev_port_attr_get = dsa_slave_port_attr_get, 959 .switchdev_port_attr_set = dsa_slave_port_attr_set, 960 .switchdev_port_obj_add = dsa_slave_port_obj_add, 961 .switchdev_port_obj_del = dsa_slave_port_obj_del, 962 .switchdev_port_obj_dump = dsa_slave_port_obj_dump, 963 }; 964 965 static void dsa_slave_adjust_link(struct net_device *dev) 966 { 967 struct dsa_slave_priv *p = netdev_priv(dev); 968 struct dsa_switch *ds = p->parent; 969 unsigned int status_changed = 0; 970 971 if (p->old_link != p->phy->link) { 972 status_changed = 1; 973 p->old_link = p->phy->link; 974 } 975 976 if (p->old_duplex != p->phy->duplex) { 977 status_changed = 1; 978 p->old_duplex = p->phy->duplex; 979 } 980 981 if (p->old_pause != p->phy->pause) { 982 status_changed = 1; 983 p->old_pause = p->phy->pause; 984 } 985 986 if (ds->drv->adjust_link && status_changed) 987 ds->drv->adjust_link(ds, p->port, p->phy); 988 989 if (status_changed) 990 phy_print_status(p->phy); 991 } 992 993 static int dsa_slave_fixed_link_update(struct net_device *dev, 994 struct fixed_phy_status *status) 995 { 996 struct dsa_slave_priv *p = netdev_priv(dev); 997 struct dsa_switch *ds = p->parent; 998 999 if (ds->drv->fixed_link_update) 1000 ds->drv->fixed_link_update(ds, p->port, status); 1001 1002 return 0; 1003 } 1004 1005 /* slave device setup *******************************************************/ 1006 static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 1007 struct net_device *slave_dev, 1008 int addr) 1009 { 1010 struct dsa_switch *ds = p->parent; 1011 1012 p->phy = ds->slave_mii_bus->phy_map[addr]; 1013 if (!p->phy) 1014 return -ENODEV; 1015 1016 /* Use already configured phy mode */ 1017 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1018 p->phy_interface = p->phy->interface; 1019 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 1020 p->phy_interface); 1021 1022 return 0; 1023 } 1024 1025 static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 1026 struct net_device *slave_dev) 1027 { 1028 struct dsa_switch *ds = p->parent; 1029 struct dsa_chip_data *cd = ds->pd; 1030 struct device_node *phy_dn, *port_dn; 1031 bool phy_is_fixed = false; 1032 u32 phy_flags = 0; 1033 int mode, ret; 1034 1035 port_dn = cd->port_dn[p->port]; 1036 mode = of_get_phy_mode(port_dn); 1037 if (mode < 0) 1038 mode = PHY_INTERFACE_MODE_NA; 1039 p->phy_interface = mode; 1040 1041 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1042 if (of_phy_is_fixed_link(port_dn)) { 1043 /* In the case of a fixed PHY, the DT node associated 1044 * to the fixed PHY is the Port DT node 1045 */ 1046 ret = of_phy_register_fixed_link(port_dn); 1047 if (ret) { 1048 netdev_err(slave_dev, "failed to register fixed PHY\n"); 1049 return ret; 1050 } 1051 phy_is_fixed = true; 1052 phy_dn = port_dn; 1053 } 1054 1055 if (ds->drv->get_phy_flags) 1056 phy_flags = ds->drv->get_phy_flags(ds, p->port); 1057 1058 if (phy_dn) { 1059 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 1060 /* If this PHY address is part of phys_mii_mask, which means 1061 * that we need to divert reads and writes to/from it, then we 1062 * want to bind this device using the slave MII bus created by 1063 * DSA to make that happen. 1064 */ 1065 if (!phy_is_fixed && ret >= 0 && 1066 (ds->phys_mii_mask & (1 << ret))) { 1067 ret = dsa_slave_phy_connect(p, slave_dev, ret); 1068 if (ret) 1069 return ret; 1070 } else { 1071 p->phy = of_phy_connect(slave_dev, phy_dn, 1072 dsa_slave_adjust_link, 1073 phy_flags, 1074 p->phy_interface); 1075 } 1076 } 1077 1078 if (p->phy && phy_is_fixed) 1079 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 1080 1081 /* We could not connect to a designated PHY, so use the switch internal 1082 * MDIO bus instead 1083 */ 1084 if (!p->phy) { 1085 ret = dsa_slave_phy_connect(p, slave_dev, p->port); 1086 if (ret) 1087 return ret; 1088 } else { 1089 netdev_info(slave_dev, "attached PHY at address %d [%s]\n", 1090 p->phy->addr, p->phy->drv->name); 1091 } 1092 1093 return 0; 1094 } 1095 1096 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1097 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1098 struct netdev_queue *txq, 1099 void *_unused) 1100 { 1101 lockdep_set_class(&txq->_xmit_lock, 1102 &dsa_slave_netdev_xmit_lock_key); 1103 } 1104 1105 int dsa_slave_suspend(struct net_device *slave_dev) 1106 { 1107 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1108 1109 if (p->phy) { 1110 phy_stop(p->phy); 1111 p->old_pause = -1; 1112 p->old_link = -1; 1113 p->old_duplex = -1; 1114 phy_suspend(p->phy); 1115 } 1116 1117 return 0; 1118 } 1119 1120 int dsa_slave_resume(struct net_device *slave_dev) 1121 { 1122 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1123 1124 netif_device_attach(slave_dev); 1125 1126 if (p->phy) { 1127 phy_resume(p->phy); 1128 phy_start(p->phy); 1129 } 1130 1131 return 0; 1132 } 1133 1134 int dsa_slave_create(struct dsa_switch *ds, struct device *parent, 1135 int port, char *name) 1136 { 1137 struct net_device *master = ds->dst->master_netdev; 1138 struct net_device *slave_dev; 1139 struct dsa_slave_priv *p; 1140 int ret; 1141 1142 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, 1143 NET_NAME_UNKNOWN, ether_setup); 1144 if (slave_dev == NULL) 1145 return -ENOMEM; 1146 1147 slave_dev->features = master->vlan_features; 1148 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1149 eth_hw_addr_inherit(slave_dev, master); 1150 slave_dev->priv_flags |= IFF_NO_QUEUE; 1151 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1152 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1153 1154 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1155 NULL); 1156 1157 SET_NETDEV_DEV(slave_dev, parent); 1158 slave_dev->dev.of_node = ds->pd->port_dn[port]; 1159 slave_dev->vlan_features = master->vlan_features; 1160 1161 p = netdev_priv(slave_dev); 1162 p->dev = slave_dev; 1163 p->parent = ds; 1164 p->port = port; 1165 1166 switch (ds->dst->tag_protocol) { 1167 #ifdef CONFIG_NET_DSA_TAG_DSA 1168 case DSA_TAG_PROTO_DSA: 1169 p->xmit = dsa_netdev_ops.xmit; 1170 break; 1171 #endif 1172 #ifdef CONFIG_NET_DSA_TAG_EDSA 1173 case DSA_TAG_PROTO_EDSA: 1174 p->xmit = edsa_netdev_ops.xmit; 1175 break; 1176 #endif 1177 #ifdef CONFIG_NET_DSA_TAG_TRAILER 1178 case DSA_TAG_PROTO_TRAILER: 1179 p->xmit = trailer_netdev_ops.xmit; 1180 break; 1181 #endif 1182 #ifdef CONFIG_NET_DSA_TAG_BRCM 1183 case DSA_TAG_PROTO_BRCM: 1184 p->xmit = brcm_netdev_ops.xmit; 1185 break; 1186 #endif 1187 default: 1188 p->xmit = dsa_slave_notag_xmit; 1189 break; 1190 } 1191 1192 p->old_pause = -1; 1193 p->old_link = -1; 1194 p->old_duplex = -1; 1195 1196 ret = dsa_slave_phy_setup(p, slave_dev); 1197 if (ret) { 1198 free_netdev(slave_dev); 1199 return ret; 1200 } 1201 1202 ds->ports[port] = slave_dev; 1203 ret = register_netdev(slave_dev); 1204 if (ret) { 1205 netdev_err(master, "error %d registering interface %s\n", 1206 ret, slave_dev->name); 1207 phy_disconnect(p->phy); 1208 ds->ports[port] = NULL; 1209 free_netdev(slave_dev); 1210 return ret; 1211 } 1212 1213 netif_carrier_off(slave_dev); 1214 1215 return 0; 1216 } 1217 1218 static bool dsa_slave_dev_check(struct net_device *dev) 1219 { 1220 return dev->netdev_ops == &dsa_slave_netdev_ops; 1221 } 1222 1223 static int dsa_slave_master_changed(struct net_device *dev) 1224 { 1225 struct net_device *master = netdev_master_upper_dev_get(dev); 1226 struct dsa_slave_priv *p = netdev_priv(dev); 1227 int err = 0; 1228 1229 if (master && master->rtnl_link_ops && 1230 !strcmp(master->rtnl_link_ops->kind, "bridge")) 1231 err = dsa_slave_bridge_port_join(dev, master); 1232 else if (dsa_port_is_bridged(p)) 1233 err = dsa_slave_bridge_port_leave(dev); 1234 1235 return err; 1236 } 1237 1238 int dsa_slave_netdevice_event(struct notifier_block *unused, 1239 unsigned long event, void *ptr) 1240 { 1241 struct net_device *dev; 1242 int err = 0; 1243 1244 switch (event) { 1245 case NETDEV_CHANGEUPPER: 1246 dev = netdev_notifier_info_to_dev(ptr); 1247 if (!dsa_slave_dev_check(dev)) 1248 goto out; 1249 1250 err = dsa_slave_master_changed(dev); 1251 if (err) 1252 netdev_warn(dev, "failed to reflect master change\n"); 1253 1254 break; 1255 } 1256 1257 out: 1258 return NOTIFY_DONE; 1259 } 1260