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 "dsa_priv.h" 22 23/* slave mii_bus handling ***************************************************/ 24static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 25{ 26 struct dsa_switch *ds = bus->priv; 27 28 if (ds->phys_mii_mask & (1 << addr)) 29 return ds->drv->phy_read(ds, addr, reg); 30 31 return 0xffff; 32} 33 34static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 35{ 36 struct dsa_switch *ds = bus->priv; 37 38 if (ds->phys_mii_mask & (1 << addr)) 39 return ds->drv->phy_write(ds, addr, reg, val); 40 41 return 0; 42} 43 44void dsa_slave_mii_bus_init(struct dsa_switch *ds) 45{ 46 ds->slave_mii_bus->priv = (void *)ds; 47 ds->slave_mii_bus->name = "dsa slave smi"; 48 ds->slave_mii_bus->read = dsa_slave_phy_read; 49 ds->slave_mii_bus->write = dsa_slave_phy_write; 50 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x", 51 ds->index, ds->pd->sw_addr); 52 ds->slave_mii_bus->parent = ds->master_dev; 53 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 54} 55 56 57/* slave device handling ****************************************************/ 58static int dsa_slave_get_iflink(const struct net_device *dev) 59{ 60 struct dsa_slave_priv *p = netdev_priv(dev); 61 62 return p->parent->dst->master_netdev->ifindex; 63} 64 65static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p) 66{ 67 return !!p->bridge_dev; 68} 69 70static int dsa_slave_open(struct net_device *dev) 71{ 72 struct dsa_slave_priv *p = netdev_priv(dev); 73 struct net_device *master = p->parent->dst->master_netdev; 74 struct dsa_switch *ds = p->parent; 75 u8 stp_state = dsa_port_is_bridged(p) ? 76 BR_STATE_BLOCKING : BR_STATE_FORWARDING; 77 int err; 78 79 if (!(master->flags & IFF_UP)) 80 return -ENETDOWN; 81 82 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 83 err = dev_uc_add(master, dev->dev_addr); 84 if (err < 0) 85 goto out; 86 } 87 88 if (dev->flags & IFF_ALLMULTI) { 89 err = dev_set_allmulti(master, 1); 90 if (err < 0) 91 goto del_unicast; 92 } 93 if (dev->flags & IFF_PROMISC) { 94 err = dev_set_promiscuity(master, 1); 95 if (err < 0) 96 goto clear_allmulti; 97 } 98 99 if (ds->drv->port_enable) { 100 err = ds->drv->port_enable(ds, p->port, p->phy); 101 if (err) 102 goto clear_promisc; 103 } 104 105 if (ds->drv->port_stp_update) 106 ds->drv->port_stp_update(ds, p->port, stp_state); 107 108 if (p->phy) 109 phy_start(p->phy); 110 111 return 0; 112 113clear_promisc: 114 if (dev->flags & IFF_PROMISC) 115 dev_set_promiscuity(master, 0); 116clear_allmulti: 117 if (dev->flags & IFF_ALLMULTI) 118 dev_set_allmulti(master, -1); 119del_unicast: 120 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 121 dev_uc_del(master, dev->dev_addr); 122out: 123 return err; 124} 125 126static int dsa_slave_close(struct net_device *dev) 127{ 128 struct dsa_slave_priv *p = netdev_priv(dev); 129 struct net_device *master = p->parent->dst->master_netdev; 130 struct dsa_switch *ds = p->parent; 131 132 if (p->phy) 133 phy_stop(p->phy); 134 135 dev_mc_unsync(master, dev); 136 dev_uc_unsync(master, dev); 137 if (dev->flags & IFF_ALLMULTI) 138 dev_set_allmulti(master, -1); 139 if (dev->flags & IFF_PROMISC) 140 dev_set_promiscuity(master, -1); 141 142 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 143 dev_uc_del(master, dev->dev_addr); 144 145 if (ds->drv->port_disable) 146 ds->drv->port_disable(ds, p->port, p->phy); 147 148 if (ds->drv->port_stp_update) 149 ds->drv->port_stp_update(ds, p->port, BR_STATE_DISABLED); 150 151 return 0; 152} 153 154static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 155{ 156 struct dsa_slave_priv *p = netdev_priv(dev); 157 struct net_device *master = p->parent->dst->master_netdev; 158 159 if (change & IFF_ALLMULTI) 160 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); 161 if (change & IFF_PROMISC) 162 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); 163} 164 165static void dsa_slave_set_rx_mode(struct net_device *dev) 166{ 167 struct dsa_slave_priv *p = netdev_priv(dev); 168 struct net_device *master = p->parent->dst->master_netdev; 169 170 dev_mc_sync(master, dev); 171 dev_uc_sync(master, dev); 172} 173 174static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 175{ 176 struct dsa_slave_priv *p = netdev_priv(dev); 177 struct net_device *master = p->parent->dst->master_netdev; 178 struct sockaddr *addr = a; 179 int err; 180 181 if (!is_valid_ether_addr(addr->sa_data)) 182 return -EADDRNOTAVAIL; 183 184 if (!(dev->flags & IFF_UP)) 185 goto out; 186 187 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 188 err = dev_uc_add(master, addr->sa_data); 189 if (err < 0) 190 return err; 191 } 192 193 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 194 dev_uc_del(master, dev->dev_addr); 195 196out: 197 ether_addr_copy(dev->dev_addr, addr->sa_data); 198 199 return 0; 200} 201 202static int dsa_slave_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], 203 struct net_device *dev, 204 const unsigned char *addr, u16 vid, u16 nlm_flags) 205{ 206 struct dsa_slave_priv *p = netdev_priv(dev); 207 struct dsa_switch *ds = p->parent; 208 int ret = -EOPNOTSUPP; 209 210 if (ds->drv->fdb_add) 211 ret = ds->drv->fdb_add(ds, p->port, addr, vid); 212 213 return ret; 214} 215 216static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], 217 struct net_device *dev, 218 const unsigned char *addr, u16 vid) 219{ 220 struct dsa_slave_priv *p = netdev_priv(dev); 221 struct dsa_switch *ds = p->parent; 222 int ret = -EOPNOTSUPP; 223 224 if (ds->drv->fdb_del) 225 ret = ds->drv->fdb_del(ds, p->port, addr, vid); 226 227 return ret; 228} 229 230static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb, 231 const unsigned char *addr, u16 vid, 232 bool is_static, 233 u32 portid, u32 seq, int type, 234 unsigned int flags) 235{ 236 struct nlmsghdr *nlh; 237 struct ndmsg *ndm; 238 239 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); 240 if (!nlh) 241 return -EMSGSIZE; 242 243 ndm = nlmsg_data(nlh); 244 ndm->ndm_family = AF_BRIDGE; 245 ndm->ndm_pad1 = 0; 246 ndm->ndm_pad2 = 0; 247 ndm->ndm_flags = NTF_EXT_LEARNED; 248 ndm->ndm_type = 0; 249 ndm->ndm_ifindex = dev->ifindex; 250 ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE; 251 252 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 253 goto nla_put_failure; 254 255 if (vid && nla_put_u16(skb, NDA_VLAN, vid)) 256 goto nla_put_failure; 257 258 nlmsg_end(skb, nlh); 259 return 0; 260 261nla_put_failure: 262 nlmsg_cancel(skb, nlh); 263 return -EMSGSIZE; 264} 265 266/* Dump information about entries, in response to GETNEIGH */ 267static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 268 struct net_device *dev, 269 struct net_device *filter_dev, int idx) 270{ 271 struct dsa_slave_priv *p = netdev_priv(dev); 272 struct dsa_switch *ds = p->parent; 273 unsigned char addr[ETH_ALEN] = { 0 }; 274 int ret; 275 276 if (!ds->drv->fdb_getnext) 277 return -EOPNOTSUPP; 278 279 for (; ; idx++) { 280 bool is_static; 281 282 ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static); 283 if (ret < 0) 284 break; 285 286 if (idx < cb->args[0]) 287 continue; 288 289 ret = dsa_slave_fill_info(dev, skb, addr, 0, 290 is_static, 291 NETLINK_CB(cb->skb).portid, 292 cb->nlh->nlmsg_seq, 293 RTM_NEWNEIGH, NLM_F_MULTI); 294 if (ret < 0) 295 break; 296 } 297 298 return idx; 299} 300 301static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 302{ 303 struct dsa_slave_priv *p = netdev_priv(dev); 304 305 if (p->phy != NULL) 306 return phy_mii_ioctl(p->phy, ifr, cmd); 307 308 return -EOPNOTSUPP; 309} 310 311/* Return a bitmask of all ports being currently bridged within a given bridge 312 * device. Note that on leave, the mask will still return the bitmask of ports 313 * currently bridged, prior to port removal, and this is exactly what we want. 314 */ 315static u32 dsa_slave_br_port_mask(struct dsa_switch *ds, 316 struct net_device *bridge) 317{ 318 struct dsa_slave_priv *p; 319 unsigned int port; 320 u32 mask = 0; 321 322 for (port = 0; port < DSA_MAX_PORTS; port++) { 323 if (!dsa_is_port_initialized(ds, port)) 324 continue; 325 326 p = netdev_priv(ds->ports[port]); 327 328 if (ds->ports[port]->priv_flags & IFF_BRIDGE_PORT && 329 p->bridge_dev == bridge) 330 mask |= 1 << port; 331 } 332 333 return mask; 334} 335 336static int dsa_slave_stp_update(struct net_device *dev, u8 state) 337{ 338 struct dsa_slave_priv *p = netdev_priv(dev); 339 struct dsa_switch *ds = p->parent; 340 int ret = -EOPNOTSUPP; 341 342 if (ds->drv->port_stp_update) 343 ret = ds->drv->port_stp_update(ds, p->port, state); 344 345 return ret; 346} 347 348static int dsa_slave_bridge_port_join(struct net_device *dev, 349 struct net_device *br) 350{ 351 struct dsa_slave_priv *p = netdev_priv(dev); 352 struct dsa_switch *ds = p->parent; 353 int ret = -EOPNOTSUPP; 354 355 p->bridge_dev = br; 356 357 if (ds->drv->port_join_bridge) 358 ret = ds->drv->port_join_bridge(ds, p->port, 359 dsa_slave_br_port_mask(ds, br)); 360 361 return ret; 362} 363 364static int dsa_slave_bridge_port_leave(struct net_device *dev) 365{ 366 struct dsa_slave_priv *p = netdev_priv(dev); 367 struct dsa_switch *ds = p->parent; 368 int ret = -EOPNOTSUPP; 369 370 371 if (ds->drv->port_leave_bridge) 372 ret = ds->drv->port_leave_bridge(ds, p->port, 373 dsa_slave_br_port_mask(ds, p->bridge_dev)); 374 375 p->bridge_dev = NULL; 376 377 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 378 * so allow it to be in BR_STATE_FORWARDING to be kept functional 379 */ 380 dsa_slave_stp_update(dev, BR_STATE_FORWARDING); 381 382 return ret; 383} 384 385static int dsa_slave_parent_id_get(struct net_device *dev, 386 struct netdev_phys_item_id *psid) 387{ 388 struct dsa_slave_priv *p = netdev_priv(dev); 389 struct dsa_switch *ds = p->parent; 390 391 psid->id_len = sizeof(ds->index); 392 memcpy(&psid->id, &ds->index, psid->id_len); 393 394 return 0; 395} 396 397static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 398{ 399 struct dsa_slave_priv *p = netdev_priv(dev); 400 401 return p->xmit(skb, dev); 402} 403 404static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb, 405 struct net_device *dev) 406{ 407 struct dsa_slave_priv *p = netdev_priv(dev); 408 409 skb->dev = p->parent->dst->master_netdev; 410 dev_queue_xmit(skb); 411 412 return NETDEV_TX_OK; 413} 414 415 416/* ethtool operations *******************************************************/ 417static int 418dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 419{ 420 struct dsa_slave_priv *p = netdev_priv(dev); 421 int err; 422 423 err = -EOPNOTSUPP; 424 if (p->phy != NULL) { 425 err = phy_read_status(p->phy); 426 if (err == 0) 427 err = phy_ethtool_gset(p->phy, cmd); 428 } 429 430 return err; 431} 432 433static int 434dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 435{ 436 struct dsa_slave_priv *p = netdev_priv(dev); 437 438 if (p->phy != NULL) 439 return phy_ethtool_sset(p->phy, cmd); 440 441 return -EOPNOTSUPP; 442} 443 444static void dsa_slave_get_drvinfo(struct net_device *dev, 445 struct ethtool_drvinfo *drvinfo) 446{ 447 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 448 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version)); 449 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 450 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 451} 452 453static int dsa_slave_get_regs_len(struct net_device *dev) 454{ 455 struct dsa_slave_priv *p = netdev_priv(dev); 456 struct dsa_switch *ds = p->parent; 457 458 if (ds->drv->get_regs_len) 459 return ds->drv->get_regs_len(ds, p->port); 460 461 return -EOPNOTSUPP; 462} 463 464static void 465dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 466{ 467 struct dsa_slave_priv *p = netdev_priv(dev); 468 struct dsa_switch *ds = p->parent; 469 470 if (ds->drv->get_regs) 471 ds->drv->get_regs(ds, p->port, regs, _p); 472} 473 474static int dsa_slave_nway_reset(struct net_device *dev) 475{ 476 struct dsa_slave_priv *p = netdev_priv(dev); 477 478 if (p->phy != NULL) 479 return genphy_restart_aneg(p->phy); 480 481 return -EOPNOTSUPP; 482} 483 484static u32 dsa_slave_get_link(struct net_device *dev) 485{ 486 struct dsa_slave_priv *p = netdev_priv(dev); 487 488 if (p->phy != NULL) { 489 genphy_update_link(p->phy); 490 return p->phy->link; 491 } 492 493 return -EOPNOTSUPP; 494} 495 496static int dsa_slave_get_eeprom_len(struct net_device *dev) 497{ 498 struct dsa_slave_priv *p = netdev_priv(dev); 499 struct dsa_switch *ds = p->parent; 500 501 if (ds->pd->eeprom_len) 502 return ds->pd->eeprom_len; 503 504 if (ds->drv->get_eeprom_len) 505 return ds->drv->get_eeprom_len(ds); 506 507 return 0; 508} 509 510static int dsa_slave_get_eeprom(struct net_device *dev, 511 struct ethtool_eeprom *eeprom, u8 *data) 512{ 513 struct dsa_slave_priv *p = netdev_priv(dev); 514 struct dsa_switch *ds = p->parent; 515 516 if (ds->drv->get_eeprom) 517 return ds->drv->get_eeprom(ds, eeprom, data); 518 519 return -EOPNOTSUPP; 520} 521 522static int dsa_slave_set_eeprom(struct net_device *dev, 523 struct ethtool_eeprom *eeprom, u8 *data) 524{ 525 struct dsa_slave_priv *p = netdev_priv(dev); 526 struct dsa_switch *ds = p->parent; 527 528 if (ds->drv->set_eeprom) 529 return ds->drv->set_eeprom(ds, eeprom, data); 530 531 return -EOPNOTSUPP; 532} 533 534static void dsa_slave_get_strings(struct net_device *dev, 535 uint32_t stringset, uint8_t *data) 536{ 537 struct dsa_slave_priv *p = netdev_priv(dev); 538 struct dsa_switch *ds = p->parent; 539 540 if (stringset == ETH_SS_STATS) { 541 int len = ETH_GSTRING_LEN; 542 543 strncpy(data, "tx_packets", len); 544 strncpy(data + len, "tx_bytes", len); 545 strncpy(data + 2 * len, "rx_packets", len); 546 strncpy(data + 3 * len, "rx_bytes", len); 547 if (ds->drv->get_strings != NULL) 548 ds->drv->get_strings(ds, p->port, data + 4 * len); 549 } 550} 551 552static void dsa_slave_get_ethtool_stats(struct net_device *dev, 553 struct ethtool_stats *stats, 554 uint64_t *data) 555{ 556 struct dsa_slave_priv *p = netdev_priv(dev); 557 struct dsa_switch *ds = p->parent; 558 559 data[0] = p->dev->stats.tx_packets; 560 data[1] = p->dev->stats.tx_bytes; 561 data[2] = p->dev->stats.rx_packets; 562 data[3] = p->dev->stats.rx_bytes; 563 if (ds->drv->get_ethtool_stats != NULL) 564 ds->drv->get_ethtool_stats(ds, p->port, data + 4); 565} 566 567static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 568{ 569 struct dsa_slave_priv *p = netdev_priv(dev); 570 struct dsa_switch *ds = p->parent; 571 572 if (sset == ETH_SS_STATS) { 573 int count; 574 575 count = 4; 576 if (ds->drv->get_sset_count != NULL) 577 count += ds->drv->get_sset_count(ds); 578 579 return count; 580 } 581 582 return -EOPNOTSUPP; 583} 584 585static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 586{ 587 struct dsa_slave_priv *p = netdev_priv(dev); 588 struct dsa_switch *ds = p->parent; 589 590 if (ds->drv->get_wol) 591 ds->drv->get_wol(ds, p->port, w); 592} 593 594static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 595{ 596 struct dsa_slave_priv *p = netdev_priv(dev); 597 struct dsa_switch *ds = p->parent; 598 int ret = -EOPNOTSUPP; 599 600 if (ds->drv->set_wol) 601 ret = ds->drv->set_wol(ds, p->port, w); 602 603 return ret; 604} 605 606static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 607{ 608 struct dsa_slave_priv *p = netdev_priv(dev); 609 struct dsa_switch *ds = p->parent; 610 int ret; 611 612 if (!ds->drv->set_eee) 613 return -EOPNOTSUPP; 614 615 ret = ds->drv->set_eee(ds, p->port, p->phy, e); 616 if (ret) 617 return ret; 618 619 if (p->phy) 620 ret = phy_ethtool_set_eee(p->phy, e); 621 622 return ret; 623} 624 625static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 626{ 627 struct dsa_slave_priv *p = netdev_priv(dev); 628 struct dsa_switch *ds = p->parent; 629 int ret; 630 631 if (!ds->drv->get_eee) 632 return -EOPNOTSUPP; 633 634 ret = ds->drv->get_eee(ds, p->port, e); 635 if (ret) 636 return ret; 637 638 if (p->phy) 639 ret = phy_ethtool_get_eee(p->phy, e); 640 641 return ret; 642} 643 644static const struct ethtool_ops dsa_slave_ethtool_ops = { 645 .get_settings = dsa_slave_get_settings, 646 .set_settings = dsa_slave_set_settings, 647 .get_drvinfo = dsa_slave_get_drvinfo, 648 .get_regs_len = dsa_slave_get_regs_len, 649 .get_regs = dsa_slave_get_regs, 650 .nway_reset = dsa_slave_nway_reset, 651 .get_link = dsa_slave_get_link, 652 .get_eeprom_len = dsa_slave_get_eeprom_len, 653 .get_eeprom = dsa_slave_get_eeprom, 654 .set_eeprom = dsa_slave_set_eeprom, 655 .get_strings = dsa_slave_get_strings, 656 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 657 .get_sset_count = dsa_slave_get_sset_count, 658 .set_wol = dsa_slave_set_wol, 659 .get_wol = dsa_slave_get_wol, 660 .set_eee = dsa_slave_set_eee, 661 .get_eee = dsa_slave_get_eee, 662}; 663 664static const struct net_device_ops dsa_slave_netdev_ops = { 665 .ndo_open = dsa_slave_open, 666 .ndo_stop = dsa_slave_close, 667 .ndo_start_xmit = dsa_slave_xmit, 668 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 669 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 670 .ndo_set_mac_address = dsa_slave_set_mac_address, 671 .ndo_fdb_add = dsa_slave_fdb_add, 672 .ndo_fdb_del = dsa_slave_fdb_del, 673 .ndo_fdb_dump = dsa_slave_fdb_dump, 674 .ndo_do_ioctl = dsa_slave_ioctl, 675 .ndo_get_iflink = dsa_slave_get_iflink, 676}; 677 678static const struct swdev_ops dsa_slave_swdev_ops = { 679 .swdev_parent_id_get = dsa_slave_parent_id_get, 680 .swdev_port_stp_update = dsa_slave_stp_update, 681}; 682 683static void dsa_slave_adjust_link(struct net_device *dev) 684{ 685 struct dsa_slave_priv *p = netdev_priv(dev); 686 struct dsa_switch *ds = p->parent; 687 unsigned int status_changed = 0; 688 689 if (p->old_link != p->phy->link) { 690 status_changed = 1; 691 p->old_link = p->phy->link; 692 } 693 694 if (p->old_duplex != p->phy->duplex) { 695 status_changed = 1; 696 p->old_duplex = p->phy->duplex; 697 } 698 699 if (p->old_pause != p->phy->pause) { 700 status_changed = 1; 701 p->old_pause = p->phy->pause; 702 } 703 704 if (ds->drv->adjust_link && status_changed) 705 ds->drv->adjust_link(ds, p->port, p->phy); 706 707 if (status_changed) 708 phy_print_status(p->phy); 709} 710 711static int dsa_slave_fixed_link_update(struct net_device *dev, 712 struct fixed_phy_status *status) 713{ 714 struct dsa_slave_priv *p = netdev_priv(dev); 715 struct dsa_switch *ds = p->parent; 716 717 if (ds->drv->fixed_link_update) 718 ds->drv->fixed_link_update(ds, p->port, status); 719 720 return 0; 721} 722 723/* slave device setup *******************************************************/ 724static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 725 struct net_device *slave_dev, 726 int addr) 727{ 728 struct dsa_switch *ds = p->parent; 729 730 p->phy = ds->slave_mii_bus->phy_map[addr]; 731 if (!p->phy) 732 return -ENODEV; 733 734 /* Use already configured phy mode */ 735 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 736 p->phy_interface = p->phy->interface; 737 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 738 p->phy_interface); 739 740 return 0; 741} 742 743static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 744 struct net_device *slave_dev) 745{ 746 struct dsa_switch *ds = p->parent; 747 struct dsa_chip_data *cd = ds->pd; 748 struct device_node *phy_dn, *port_dn; 749 bool phy_is_fixed = false; 750 u32 phy_flags = 0; 751 int mode, ret; 752 753 port_dn = cd->port_dn[p->port]; 754 mode = of_get_phy_mode(port_dn); 755 if (mode < 0) 756 mode = PHY_INTERFACE_MODE_NA; 757 p->phy_interface = mode; 758 759 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 760 if (of_phy_is_fixed_link(port_dn)) { 761 /* In the case of a fixed PHY, the DT node associated 762 * to the fixed PHY is the Port DT node 763 */ 764 ret = of_phy_register_fixed_link(port_dn); 765 if (ret) { 766 netdev_err(slave_dev, "failed to register fixed PHY\n"); 767 return ret; 768 } 769 phy_is_fixed = true; 770 phy_dn = port_dn; 771 } 772 773 if (ds->drv->get_phy_flags) 774 phy_flags = ds->drv->get_phy_flags(ds, p->port); 775 776 if (phy_dn) { 777 ret = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 778 /* If this PHY address is part of phys_mii_mask, which means 779 * that we need to divert reads and writes to/from it, then we 780 * want to bind this device using the slave MII bus created by 781 * DSA to make that happen. 782 */ 783 if (!phy_is_fixed && ret >= 0 && 784 (ds->phys_mii_mask & (1 << ret))) { 785 ret = dsa_slave_phy_connect(p, slave_dev, ret); 786 if (ret) 787 return ret; 788 } else { 789 p->phy = of_phy_connect(slave_dev, phy_dn, 790 dsa_slave_adjust_link, 791 phy_flags, 792 p->phy_interface); 793 } 794 } 795 796 if (p->phy && phy_is_fixed) 797 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 798 799 /* We could not connect to a designated PHY, so use the switch internal 800 * MDIO bus instead 801 */ 802 if (!p->phy) { 803 ret = dsa_slave_phy_connect(p, slave_dev, p->port); 804 if (ret) 805 return ret; 806 } else { 807 netdev_info(slave_dev, "attached PHY at address %d [%s]\n", 808 p->phy->addr, p->phy->drv->name); 809 } 810 811 return 0; 812} 813 814int dsa_slave_suspend(struct net_device *slave_dev) 815{ 816 struct dsa_slave_priv *p = netdev_priv(slave_dev); 817 818 netif_device_detach(slave_dev); 819 820 if (p->phy) { 821 phy_stop(p->phy); 822 p->old_pause = -1; 823 p->old_link = -1; 824 p->old_duplex = -1; 825 phy_suspend(p->phy); 826 } 827 828 return 0; 829} 830 831int dsa_slave_resume(struct net_device *slave_dev) 832{ 833 struct dsa_slave_priv *p = netdev_priv(slave_dev); 834 835 netif_device_attach(slave_dev); 836 837 if (p->phy) { 838 phy_resume(p->phy); 839 phy_start(p->phy); 840 } 841 842 return 0; 843} 844 845int dsa_slave_create(struct dsa_switch *ds, struct device *parent, 846 int port, char *name) 847{ 848 struct net_device *master = ds->dst->master_netdev; 849 struct net_device *slave_dev; 850 struct dsa_slave_priv *p; 851 int ret; 852 853 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, 854 NET_NAME_UNKNOWN, ether_setup); 855 if (slave_dev == NULL) 856 return -ENOMEM; 857 858 slave_dev->features = master->vlan_features; 859 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 860 eth_hw_addr_inherit(slave_dev, master); 861 slave_dev->tx_queue_len = 0; 862 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 863 slave_dev->swdev_ops = &dsa_slave_swdev_ops; 864 865 SET_NETDEV_DEV(slave_dev, parent); 866 slave_dev->dev.of_node = ds->pd->port_dn[port]; 867 slave_dev->vlan_features = master->vlan_features; 868 869 p = netdev_priv(slave_dev); 870 p->dev = slave_dev; 871 p->parent = ds; 872 p->port = port; 873 874 switch (ds->dst->tag_protocol) { 875#ifdef CONFIG_NET_DSA_TAG_DSA 876 case DSA_TAG_PROTO_DSA: 877 p->xmit = dsa_netdev_ops.xmit; 878 break; 879#endif 880#ifdef CONFIG_NET_DSA_TAG_EDSA 881 case DSA_TAG_PROTO_EDSA: 882 p->xmit = edsa_netdev_ops.xmit; 883 break; 884#endif 885#ifdef CONFIG_NET_DSA_TAG_TRAILER 886 case DSA_TAG_PROTO_TRAILER: 887 p->xmit = trailer_netdev_ops.xmit; 888 break; 889#endif 890#ifdef CONFIG_NET_DSA_TAG_BRCM 891 case DSA_TAG_PROTO_BRCM: 892 p->xmit = brcm_netdev_ops.xmit; 893 break; 894#endif 895 default: 896 p->xmit = dsa_slave_notag_xmit; 897 break; 898 } 899 900 p->old_pause = -1; 901 p->old_link = -1; 902 p->old_duplex = -1; 903 904 ret = dsa_slave_phy_setup(p, slave_dev); 905 if (ret) { 906 free_netdev(slave_dev); 907 return ret; 908 } 909 910 ds->ports[port] = slave_dev; 911 ret = register_netdev(slave_dev); 912 if (ret) { 913 netdev_err(master, "error %d registering interface %s\n", 914 ret, slave_dev->name); 915 phy_disconnect(p->phy); 916 ds->ports[port] = NULL; 917 free_netdev(slave_dev); 918 return ret; 919 } 920 921 netif_carrier_off(slave_dev); 922 923 return 0; 924} 925 926static bool dsa_slave_dev_check(struct net_device *dev) 927{ 928 return dev->netdev_ops == &dsa_slave_netdev_ops; 929} 930 931static int dsa_slave_master_changed(struct net_device *dev) 932{ 933 struct net_device *master = netdev_master_upper_dev_get(dev); 934 struct dsa_slave_priv *p = netdev_priv(dev); 935 int err = 0; 936 937 if (master && master->rtnl_link_ops && 938 !strcmp(master->rtnl_link_ops->kind, "bridge")) 939 err = dsa_slave_bridge_port_join(dev, master); 940 else if (dsa_port_is_bridged(p)) 941 err = dsa_slave_bridge_port_leave(dev); 942 943 return err; 944} 945 946int dsa_slave_netdevice_event(struct notifier_block *unused, 947 unsigned long event, void *ptr) 948{ 949 struct net_device *dev; 950 int err = 0; 951 952 switch (event) { 953 case NETDEV_CHANGEUPPER: 954 dev = netdev_notifier_info_to_dev(ptr); 955 if (!dsa_slave_dev_check(dev)) 956 goto out; 957 958 err = dsa_slave_master_changed(dev); 959 if (err) 960 netdev_warn(dev, "failed to reflect master change\n"); 961 962 break; 963 } 964 965out: 966 return NOTIFY_DONE; 967} 968