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 <linux/list.h> 20 #include <net/rtnetlink.h> 21 #include <net/pkt_cls.h> 22 #include <net/tc_act/tc_mirred.h> 23 #include <linux/if_bridge.h> 24 #include <linux/netpoll.h> 25 26 #include "dsa_priv.h" 27 28 static bool dsa_slave_dev_check(struct net_device *dev); 29 30 /* slave mii_bus handling ***************************************************/ 31 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 32 { 33 struct dsa_switch *ds = bus->priv; 34 35 if (ds->phys_mii_mask & (1 << addr)) 36 return ds->ops->phy_read(ds, addr, reg); 37 38 return 0xffff; 39 } 40 41 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 42 { 43 struct dsa_switch *ds = bus->priv; 44 45 if (ds->phys_mii_mask & (1 << addr)) 46 return ds->ops->phy_write(ds, addr, reg, val); 47 48 return 0; 49 } 50 51 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 52 { 53 ds->slave_mii_bus->priv = (void *)ds; 54 ds->slave_mii_bus->name = "dsa slave smi"; 55 ds->slave_mii_bus->read = dsa_slave_phy_read; 56 ds->slave_mii_bus->write = dsa_slave_phy_write; 57 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d", 58 ds->dst->tree, ds->index); 59 ds->slave_mii_bus->parent = ds->dev; 60 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 61 } 62 63 64 /* slave device handling ****************************************************/ 65 static int dsa_slave_get_iflink(const struct net_device *dev) 66 { 67 struct dsa_slave_priv *p = netdev_priv(dev); 68 69 return dsa_master_netdev(p)->ifindex; 70 } 71 72 static int dsa_slave_open(struct net_device *dev) 73 { 74 struct dsa_slave_priv *p = netdev_priv(dev); 75 struct dsa_port *dp = p->dp; 76 struct dsa_switch *ds = dp->ds; 77 struct net_device *master = dsa_master_netdev(p); 78 u8 stp_state = dp->bridge_dev ? 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->ops->port_enable) { 102 err = ds->ops->port_enable(ds, p->dp->index, p->phy); 103 if (err) 104 goto clear_promisc; 105 } 106 107 dsa_port_set_state_now(p->dp, 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 = dsa_master_netdev(p); 131 struct dsa_switch *ds = p->dp->ds; 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->ops->port_disable) 147 ds->ops->port_disable(ds, p->dp->index, p->phy); 148 149 dsa_port_set_state_now(p->dp, BR_STATE_DISABLED); 150 151 return 0; 152 } 153 154 static 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 = dsa_master_netdev(p); 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 } 164 165 static 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 = dsa_master_netdev(p); 169 170 dev_mc_sync(master, dev); 171 dev_uc_sync(master, dev); 172 } 173 174 static 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 = dsa_master_netdev(p); 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); 195 196 out: 197 ether_addr_copy(dev->dev_addr, addr->sa_data); 198 199 return 0; 200 } 201 202 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 203 { 204 struct dsa_slave_priv *p = netdev_priv(dev); 205 206 if (p->phy != NULL) 207 return phy_mii_ioctl(p->phy, ifr, cmd); 208 209 return -EOPNOTSUPP; 210 } 211 212 static int dsa_slave_port_attr_set(struct net_device *dev, 213 const struct switchdev_attr *attr, 214 struct switchdev_trans *trans) 215 { 216 struct dsa_slave_priv *p = netdev_priv(dev); 217 struct dsa_port *dp = p->dp; 218 int ret; 219 220 switch (attr->id) { 221 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 222 ret = dsa_port_set_state(dp, attr->u.stp_state, trans); 223 break; 224 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 225 ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering, 226 trans); 227 break; 228 case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: 229 ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans); 230 break; 231 default: 232 ret = -EOPNOTSUPP; 233 break; 234 } 235 236 return ret; 237 } 238 239 static int dsa_slave_port_obj_add(struct net_device *dev, 240 const struct switchdev_obj *obj, 241 struct switchdev_trans *trans) 242 { 243 struct dsa_slave_priv *p = netdev_priv(dev); 244 struct dsa_port *dp = p->dp; 245 int err; 246 247 /* For the prepare phase, ensure the full set of changes is feasable in 248 * one go in order to signal a failure properly. If an operation is not 249 * supported, return -EOPNOTSUPP. 250 */ 251 252 switch (obj->id) { 253 case SWITCHDEV_OBJ_ID_PORT_FDB: 254 err = dsa_port_fdb_add(dp, SWITCHDEV_OBJ_PORT_FDB(obj), trans); 255 break; 256 case SWITCHDEV_OBJ_ID_PORT_MDB: 257 err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans); 258 break; 259 case SWITCHDEV_OBJ_ID_PORT_VLAN: 260 err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj), 261 trans); 262 break; 263 default: 264 err = -EOPNOTSUPP; 265 break; 266 } 267 268 return err; 269 } 270 271 static int dsa_slave_port_obj_del(struct net_device *dev, 272 const struct switchdev_obj *obj) 273 { 274 struct dsa_slave_priv *p = netdev_priv(dev); 275 struct dsa_port *dp = p->dp; 276 int err; 277 278 switch (obj->id) { 279 case SWITCHDEV_OBJ_ID_PORT_FDB: 280 err = dsa_port_fdb_del(dp, SWITCHDEV_OBJ_PORT_FDB(obj)); 281 break; 282 case SWITCHDEV_OBJ_ID_PORT_MDB: 283 err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); 284 break; 285 case SWITCHDEV_OBJ_ID_PORT_VLAN: 286 err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj)); 287 break; 288 default: 289 err = -EOPNOTSUPP; 290 break; 291 } 292 293 return err; 294 } 295 296 static int dsa_slave_port_obj_dump(struct net_device *dev, 297 struct switchdev_obj *obj, 298 switchdev_obj_dump_cb_t *cb) 299 { 300 struct dsa_slave_priv *p = netdev_priv(dev); 301 struct dsa_port *dp = p->dp; 302 int err; 303 304 switch (obj->id) { 305 case SWITCHDEV_OBJ_ID_PORT_FDB: 306 err = dsa_port_fdb_dump(dp, SWITCHDEV_OBJ_PORT_FDB(obj), cb); 307 break; 308 case SWITCHDEV_OBJ_ID_PORT_MDB: 309 err = dsa_port_mdb_dump(dp, SWITCHDEV_OBJ_PORT_MDB(obj), cb); 310 break; 311 case SWITCHDEV_OBJ_ID_PORT_VLAN: 312 err = dsa_port_vlan_dump(dp, SWITCHDEV_OBJ_PORT_VLAN(obj), cb); 313 break; 314 default: 315 err = -EOPNOTSUPP; 316 break; 317 } 318 319 return err; 320 } 321 322 static int dsa_slave_port_attr_get(struct net_device *dev, 323 struct switchdev_attr *attr) 324 { 325 struct dsa_slave_priv *p = netdev_priv(dev); 326 struct dsa_switch *ds = p->dp->ds; 327 328 switch (attr->id) { 329 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: 330 attr->u.ppid.id_len = sizeof(ds->index); 331 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len); 332 break; 333 default: 334 return -EOPNOTSUPP; 335 } 336 337 return 0; 338 } 339 340 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p, 341 struct sk_buff *skb) 342 { 343 #ifdef CONFIG_NET_POLL_CONTROLLER 344 if (p->netpoll) 345 netpoll_send_skb(p->netpoll, skb); 346 #else 347 BUG(); 348 #endif 349 return NETDEV_TX_OK; 350 } 351 352 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 353 { 354 struct dsa_slave_priv *p = netdev_priv(dev); 355 struct sk_buff *nskb; 356 357 dev->stats.tx_packets++; 358 dev->stats.tx_bytes += skb->len; 359 360 /* Transmit function may have to reallocate the original SKB, 361 * in which case it must have freed it. Only free it here on error. 362 */ 363 nskb = p->xmit(skb, dev); 364 if (!nskb) { 365 kfree_skb(skb); 366 return NETDEV_TX_OK; 367 } 368 369 /* SKB for netpoll still need to be mangled with the protocol-specific 370 * tag to be successfully transmitted 371 */ 372 if (unlikely(netpoll_tx_running(dev))) 373 return dsa_netpoll_send_skb(p, nskb); 374 375 /* Queue the SKB for transmission on the parent interface, but 376 * do not modify its EtherType 377 */ 378 nskb->dev = dsa_master_netdev(p); 379 dev_queue_xmit(nskb); 380 381 return NETDEV_TX_OK; 382 } 383 384 /* ethtool operations *******************************************************/ 385 static int 386 dsa_slave_get_link_ksettings(struct net_device *dev, 387 struct ethtool_link_ksettings *cmd) 388 { 389 struct dsa_slave_priv *p = netdev_priv(dev); 390 391 if (!p->phy) 392 return -EOPNOTSUPP; 393 394 phy_ethtool_ksettings_get(p->phy, cmd); 395 396 return 0; 397 } 398 399 static int 400 dsa_slave_set_link_ksettings(struct net_device *dev, 401 const struct ethtool_link_ksettings *cmd) 402 { 403 struct dsa_slave_priv *p = netdev_priv(dev); 404 405 if (p->phy != NULL) 406 return phy_ethtool_ksettings_set(p->phy, cmd); 407 408 return -EOPNOTSUPP; 409 } 410 411 static void dsa_slave_get_drvinfo(struct net_device *dev, 412 struct ethtool_drvinfo *drvinfo) 413 { 414 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 415 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 416 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 417 } 418 419 static int dsa_slave_get_regs_len(struct net_device *dev) 420 { 421 struct dsa_slave_priv *p = netdev_priv(dev); 422 struct dsa_switch *ds = p->dp->ds; 423 424 if (ds->ops->get_regs_len) 425 return ds->ops->get_regs_len(ds, p->dp->index); 426 427 return -EOPNOTSUPP; 428 } 429 430 static void 431 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 432 { 433 struct dsa_slave_priv *p = netdev_priv(dev); 434 struct dsa_switch *ds = p->dp->ds; 435 436 if (ds->ops->get_regs) 437 ds->ops->get_regs(ds, p->dp->index, regs, _p); 438 } 439 440 static int dsa_slave_nway_reset(struct net_device *dev) 441 { 442 struct dsa_slave_priv *p = netdev_priv(dev); 443 444 if (p->phy != NULL) 445 return genphy_restart_aneg(p->phy); 446 447 return -EOPNOTSUPP; 448 } 449 450 static u32 dsa_slave_get_link(struct net_device *dev) 451 { 452 struct dsa_slave_priv *p = netdev_priv(dev); 453 454 if (p->phy != NULL) { 455 genphy_update_link(p->phy); 456 return p->phy->link; 457 } 458 459 return -EOPNOTSUPP; 460 } 461 462 static int dsa_slave_get_eeprom_len(struct net_device *dev) 463 { 464 struct dsa_slave_priv *p = netdev_priv(dev); 465 struct dsa_switch *ds = p->dp->ds; 466 467 if (ds->cd && ds->cd->eeprom_len) 468 return ds->cd->eeprom_len; 469 470 if (ds->ops->get_eeprom_len) 471 return ds->ops->get_eeprom_len(ds); 472 473 return 0; 474 } 475 476 static int dsa_slave_get_eeprom(struct net_device *dev, 477 struct ethtool_eeprom *eeprom, u8 *data) 478 { 479 struct dsa_slave_priv *p = netdev_priv(dev); 480 struct dsa_switch *ds = p->dp->ds; 481 482 if (ds->ops->get_eeprom) 483 return ds->ops->get_eeprom(ds, eeprom, data); 484 485 return -EOPNOTSUPP; 486 } 487 488 static int dsa_slave_set_eeprom(struct net_device *dev, 489 struct ethtool_eeprom *eeprom, u8 *data) 490 { 491 struct dsa_slave_priv *p = netdev_priv(dev); 492 struct dsa_switch *ds = p->dp->ds; 493 494 if (ds->ops->set_eeprom) 495 return ds->ops->set_eeprom(ds, eeprom, data); 496 497 return -EOPNOTSUPP; 498 } 499 500 static void dsa_slave_get_strings(struct net_device *dev, 501 uint32_t stringset, uint8_t *data) 502 { 503 struct dsa_slave_priv *p = netdev_priv(dev); 504 struct dsa_switch *ds = p->dp->ds; 505 506 if (stringset == ETH_SS_STATS) { 507 int len = ETH_GSTRING_LEN; 508 509 strncpy(data, "tx_packets", len); 510 strncpy(data + len, "tx_bytes", len); 511 strncpy(data + 2 * len, "rx_packets", len); 512 strncpy(data + 3 * len, "rx_bytes", len); 513 if (ds->ops->get_strings) 514 ds->ops->get_strings(ds, p->dp->index, data + 4 * len); 515 } 516 } 517 518 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev, 519 struct ethtool_stats *stats, 520 uint64_t *data) 521 { 522 struct dsa_switch_tree *dst = dev->dsa_ptr; 523 struct dsa_port *cpu_dp = dsa_get_cpu_port(dst); 524 struct dsa_switch *ds = cpu_dp->ds; 525 s8 cpu_port = cpu_dp->index; 526 int count = 0; 527 528 if (cpu_dp->ethtool_ops.get_sset_count) { 529 count = cpu_dp->ethtool_ops.get_sset_count(dev, ETH_SS_STATS); 530 cpu_dp->ethtool_ops.get_ethtool_stats(dev, stats, data); 531 } 532 533 if (ds->ops->get_ethtool_stats) 534 ds->ops->get_ethtool_stats(ds, cpu_port, data + count); 535 } 536 537 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset) 538 { 539 struct dsa_switch_tree *dst = dev->dsa_ptr; 540 struct dsa_port *cpu_dp = dsa_get_cpu_port(dst); 541 struct dsa_switch *ds = cpu_dp->ds; 542 int count = 0; 543 544 if (cpu_dp->ethtool_ops.get_sset_count) 545 count += cpu_dp->ethtool_ops.get_sset_count(dev, sset); 546 547 if (sset == ETH_SS_STATS && ds->ops->get_sset_count) 548 count += ds->ops->get_sset_count(ds); 549 550 return count; 551 } 552 553 static void dsa_cpu_port_get_strings(struct net_device *dev, 554 uint32_t stringset, uint8_t *data) 555 { 556 struct dsa_switch_tree *dst = dev->dsa_ptr; 557 struct dsa_port *cpu_dp = dsa_get_cpu_port(dst); 558 struct dsa_switch *ds = cpu_dp->ds; 559 s8 cpu_port = cpu_dp->index; 560 int len = ETH_GSTRING_LEN; 561 int mcount = 0, count; 562 unsigned int i; 563 uint8_t pfx[4]; 564 uint8_t *ndata; 565 566 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port); 567 /* We do not want to be NULL-terminated, since this is a prefix */ 568 pfx[sizeof(pfx) - 1] = '_'; 569 570 if (cpu_dp->ethtool_ops.get_sset_count) { 571 mcount = cpu_dp->ethtool_ops.get_sset_count(dev, ETH_SS_STATS); 572 cpu_dp->ethtool_ops.get_strings(dev, stringset, data); 573 } 574 575 if (stringset == ETH_SS_STATS && ds->ops->get_strings) { 576 ndata = data + mcount * len; 577 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle 578 * the output after to prepend our CPU port prefix we 579 * constructed earlier 580 */ 581 ds->ops->get_strings(ds, cpu_port, ndata); 582 count = ds->ops->get_sset_count(ds); 583 for (i = 0; i < count; i++) { 584 memmove(ndata + (i * len + sizeof(pfx)), 585 ndata + i * len, len - sizeof(pfx)); 586 memcpy(ndata + i * len, pfx, sizeof(pfx)); 587 } 588 } 589 } 590 591 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 592 struct ethtool_stats *stats, 593 uint64_t *data) 594 { 595 struct dsa_slave_priv *p = netdev_priv(dev); 596 struct dsa_switch *ds = p->dp->ds; 597 598 data[0] = dev->stats.tx_packets; 599 data[1] = dev->stats.tx_bytes; 600 data[2] = dev->stats.rx_packets; 601 data[3] = dev->stats.rx_bytes; 602 if (ds->ops->get_ethtool_stats) 603 ds->ops->get_ethtool_stats(ds, p->dp->index, data + 4); 604 } 605 606 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 607 { 608 struct dsa_slave_priv *p = netdev_priv(dev); 609 struct dsa_switch *ds = p->dp->ds; 610 611 if (sset == ETH_SS_STATS) { 612 int count; 613 614 count = 4; 615 if (ds->ops->get_sset_count) 616 count += ds->ops->get_sset_count(ds); 617 618 return count; 619 } 620 621 return -EOPNOTSUPP; 622 } 623 624 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 625 { 626 struct dsa_slave_priv *p = netdev_priv(dev); 627 struct dsa_switch *ds = p->dp->ds; 628 629 if (ds->ops->get_wol) 630 ds->ops->get_wol(ds, p->dp->index, w); 631 } 632 633 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 634 { 635 struct dsa_slave_priv *p = netdev_priv(dev); 636 struct dsa_switch *ds = p->dp->ds; 637 int ret = -EOPNOTSUPP; 638 639 if (ds->ops->set_wol) 640 ret = ds->ops->set_wol(ds, p->dp->index, w); 641 642 return ret; 643 } 644 645 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 646 { 647 struct dsa_slave_priv *p = netdev_priv(dev); 648 struct dsa_switch *ds = p->dp->ds; 649 int ret; 650 651 /* Port's PHY and MAC both need to be EEE capable */ 652 if (!p->phy) 653 return -ENODEV; 654 655 if (!ds->ops->set_eee) 656 return -EOPNOTSUPP; 657 658 ret = ds->ops->set_eee(ds, p->dp->index, p->phy, e); 659 if (ret) 660 return ret; 661 662 return phy_ethtool_set_eee(p->phy, e); 663 } 664 665 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 666 { 667 struct dsa_slave_priv *p = netdev_priv(dev); 668 struct dsa_switch *ds = p->dp->ds; 669 int ret; 670 671 /* Port's PHY and MAC both need to be EEE capable */ 672 if (!p->phy) 673 return -ENODEV; 674 675 if (!ds->ops->get_eee) 676 return -EOPNOTSUPP; 677 678 ret = ds->ops->get_eee(ds, p->dp->index, e); 679 if (ret) 680 return ret; 681 682 return phy_ethtool_get_eee(p->phy, e); 683 } 684 685 #ifdef CONFIG_NET_POLL_CONTROLLER 686 static int dsa_slave_netpoll_setup(struct net_device *dev, 687 struct netpoll_info *ni) 688 { 689 struct dsa_slave_priv *p = netdev_priv(dev); 690 struct net_device *master = dsa_master_netdev(p); 691 struct netpoll *netpoll; 692 int err = 0; 693 694 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 695 if (!netpoll) 696 return -ENOMEM; 697 698 err = __netpoll_setup(netpoll, master); 699 if (err) { 700 kfree(netpoll); 701 goto out; 702 } 703 704 p->netpoll = netpoll; 705 out: 706 return err; 707 } 708 709 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 710 { 711 struct dsa_slave_priv *p = netdev_priv(dev); 712 struct netpoll *netpoll = p->netpoll; 713 714 if (!netpoll) 715 return; 716 717 p->netpoll = NULL; 718 719 __netpoll_free_async(netpoll); 720 } 721 722 static void dsa_slave_poll_controller(struct net_device *dev) 723 { 724 } 725 #endif 726 727 static int dsa_slave_get_phys_port_name(struct net_device *dev, 728 char *name, size_t len) 729 { 730 struct dsa_slave_priv *p = netdev_priv(dev); 731 732 if (snprintf(name, len, "p%d", p->dp->index) >= len) 733 return -EINVAL; 734 735 return 0; 736 } 737 738 static struct dsa_mall_tc_entry * 739 dsa_slave_mall_tc_entry_find(struct dsa_slave_priv *p, 740 unsigned long cookie) 741 { 742 struct dsa_mall_tc_entry *mall_tc_entry; 743 744 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 745 if (mall_tc_entry->cookie == cookie) 746 return mall_tc_entry; 747 748 return NULL; 749 } 750 751 static int dsa_slave_add_cls_matchall(struct net_device *dev, 752 __be16 protocol, 753 struct tc_cls_matchall_offload *cls, 754 bool ingress) 755 { 756 struct dsa_slave_priv *p = netdev_priv(dev); 757 struct dsa_mall_tc_entry *mall_tc_entry; 758 struct dsa_switch *ds = p->dp->ds; 759 struct net *net = dev_net(dev); 760 struct dsa_slave_priv *to_p; 761 struct net_device *to_dev; 762 const struct tc_action *a; 763 int err = -EOPNOTSUPP; 764 LIST_HEAD(actions); 765 int ifindex; 766 767 if (!ds->ops->port_mirror_add) 768 return err; 769 770 if (!tc_single_action(cls->exts)) 771 return err; 772 773 tcf_exts_to_list(cls->exts, &actions); 774 a = list_first_entry(&actions, struct tc_action, list); 775 776 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) { 777 struct dsa_mall_mirror_tc_entry *mirror; 778 779 ifindex = tcf_mirred_ifindex(a); 780 to_dev = __dev_get_by_index(net, ifindex); 781 if (!to_dev) 782 return -EINVAL; 783 784 if (!dsa_slave_dev_check(to_dev)) 785 return -EOPNOTSUPP; 786 787 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 788 if (!mall_tc_entry) 789 return -ENOMEM; 790 791 mall_tc_entry->cookie = cls->cookie; 792 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 793 mirror = &mall_tc_entry->mirror; 794 795 to_p = netdev_priv(to_dev); 796 797 mirror->to_local_port = to_p->dp->index; 798 mirror->ingress = ingress; 799 800 err = ds->ops->port_mirror_add(ds, p->dp->index, mirror, 801 ingress); 802 if (err) { 803 kfree(mall_tc_entry); 804 return err; 805 } 806 807 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 808 } 809 810 return 0; 811 } 812 813 static void dsa_slave_del_cls_matchall(struct net_device *dev, 814 struct tc_cls_matchall_offload *cls) 815 { 816 struct dsa_slave_priv *p = netdev_priv(dev); 817 struct dsa_mall_tc_entry *mall_tc_entry; 818 struct dsa_switch *ds = p->dp->ds; 819 820 if (!ds->ops->port_mirror_del) 821 return; 822 823 mall_tc_entry = dsa_slave_mall_tc_entry_find(p, cls->cookie); 824 if (!mall_tc_entry) 825 return; 826 827 list_del(&mall_tc_entry->list); 828 829 switch (mall_tc_entry->type) { 830 case DSA_PORT_MALL_MIRROR: 831 ds->ops->port_mirror_del(ds, p->dp->index, 832 &mall_tc_entry->mirror); 833 break; 834 default: 835 WARN_ON(1); 836 } 837 838 kfree(mall_tc_entry); 839 } 840 841 static int dsa_slave_setup_tc(struct net_device *dev, u32 handle, 842 u32 chain_index, __be16 protocol, 843 struct tc_to_netdev *tc) 844 { 845 bool ingress = TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS); 846 847 if (chain_index) 848 return -EOPNOTSUPP; 849 850 switch (tc->type) { 851 case TC_SETUP_MATCHALL: 852 switch (tc->cls_mall->command) { 853 case TC_CLSMATCHALL_REPLACE: 854 return dsa_slave_add_cls_matchall(dev, protocol, 855 tc->cls_mall, 856 ingress); 857 case TC_CLSMATCHALL_DESTROY: 858 dsa_slave_del_cls_matchall(dev, tc->cls_mall); 859 return 0; 860 } 861 default: 862 return -EOPNOTSUPP; 863 } 864 } 865 866 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops) 867 { 868 ops->get_sset_count = dsa_cpu_port_get_sset_count; 869 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats; 870 ops->get_strings = dsa_cpu_port_get_strings; 871 } 872 873 static int dsa_slave_get_rxnfc(struct net_device *dev, 874 struct ethtool_rxnfc *nfc, u32 *rule_locs) 875 { 876 struct dsa_slave_priv *p = netdev_priv(dev); 877 struct dsa_switch *ds = p->dp->ds; 878 879 if (!ds->ops->get_rxnfc) 880 return -EOPNOTSUPP; 881 882 return ds->ops->get_rxnfc(ds, p->dp->index, nfc, rule_locs); 883 } 884 885 static int dsa_slave_set_rxnfc(struct net_device *dev, 886 struct ethtool_rxnfc *nfc) 887 { 888 struct dsa_slave_priv *p = netdev_priv(dev); 889 struct dsa_switch *ds = p->dp->ds; 890 891 if (!ds->ops->set_rxnfc) 892 return -EOPNOTSUPP; 893 894 return ds->ops->set_rxnfc(ds, p->dp->index, nfc); 895 } 896 897 static const struct ethtool_ops dsa_slave_ethtool_ops = { 898 .get_drvinfo = dsa_slave_get_drvinfo, 899 .get_regs_len = dsa_slave_get_regs_len, 900 .get_regs = dsa_slave_get_regs, 901 .nway_reset = dsa_slave_nway_reset, 902 .get_link = dsa_slave_get_link, 903 .get_eeprom_len = dsa_slave_get_eeprom_len, 904 .get_eeprom = dsa_slave_get_eeprom, 905 .set_eeprom = dsa_slave_set_eeprom, 906 .get_strings = dsa_slave_get_strings, 907 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 908 .get_sset_count = dsa_slave_get_sset_count, 909 .set_wol = dsa_slave_set_wol, 910 .get_wol = dsa_slave_get_wol, 911 .set_eee = dsa_slave_set_eee, 912 .get_eee = dsa_slave_get_eee, 913 .get_link_ksettings = dsa_slave_get_link_ksettings, 914 .set_link_ksettings = dsa_slave_set_link_ksettings, 915 .get_rxnfc = dsa_slave_get_rxnfc, 916 .set_rxnfc = dsa_slave_set_rxnfc, 917 }; 918 919 static const struct net_device_ops dsa_slave_netdev_ops = { 920 .ndo_open = dsa_slave_open, 921 .ndo_stop = dsa_slave_close, 922 .ndo_start_xmit = dsa_slave_xmit, 923 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 924 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 925 .ndo_set_mac_address = dsa_slave_set_mac_address, 926 .ndo_fdb_add = switchdev_port_fdb_add, 927 .ndo_fdb_del = switchdev_port_fdb_del, 928 .ndo_fdb_dump = switchdev_port_fdb_dump, 929 .ndo_do_ioctl = dsa_slave_ioctl, 930 .ndo_get_iflink = dsa_slave_get_iflink, 931 #ifdef CONFIG_NET_POLL_CONTROLLER 932 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 933 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 934 .ndo_poll_controller = dsa_slave_poll_controller, 935 #endif 936 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 937 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 938 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 939 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 940 .ndo_setup_tc = dsa_slave_setup_tc, 941 }; 942 943 static const struct switchdev_ops dsa_slave_switchdev_ops = { 944 .switchdev_port_attr_get = dsa_slave_port_attr_get, 945 .switchdev_port_attr_set = dsa_slave_port_attr_set, 946 .switchdev_port_obj_add = dsa_slave_port_obj_add, 947 .switchdev_port_obj_del = dsa_slave_port_obj_del, 948 .switchdev_port_obj_dump = dsa_slave_port_obj_dump, 949 }; 950 951 static struct device_type dsa_type = { 952 .name = "dsa", 953 }; 954 955 static void dsa_slave_adjust_link(struct net_device *dev) 956 { 957 struct dsa_slave_priv *p = netdev_priv(dev); 958 struct dsa_switch *ds = p->dp->ds; 959 unsigned int status_changed = 0; 960 961 if (p->old_link != p->phy->link) { 962 status_changed = 1; 963 p->old_link = p->phy->link; 964 } 965 966 if (p->old_duplex != p->phy->duplex) { 967 status_changed = 1; 968 p->old_duplex = p->phy->duplex; 969 } 970 971 if (p->old_pause != p->phy->pause) { 972 status_changed = 1; 973 p->old_pause = p->phy->pause; 974 } 975 976 if (ds->ops->adjust_link && status_changed) 977 ds->ops->adjust_link(ds, p->dp->index, p->phy); 978 979 if (status_changed) 980 phy_print_status(p->phy); 981 } 982 983 static int dsa_slave_fixed_link_update(struct net_device *dev, 984 struct fixed_phy_status *status) 985 { 986 struct dsa_slave_priv *p; 987 struct dsa_switch *ds; 988 989 if (dev) { 990 p = netdev_priv(dev); 991 ds = p->dp->ds; 992 if (ds->ops->fixed_link_update) 993 ds->ops->fixed_link_update(ds, p->dp->index, status); 994 } 995 996 return 0; 997 } 998 999 /* slave device setup *******************************************************/ 1000 static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 1001 struct net_device *slave_dev, 1002 int addr) 1003 { 1004 struct dsa_switch *ds = p->dp->ds; 1005 1006 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr); 1007 if (!p->phy) { 1008 netdev_err(slave_dev, "no phy at %d\n", addr); 1009 return -ENODEV; 1010 } 1011 1012 /* Use already configured phy mode */ 1013 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1014 p->phy_interface = p->phy->interface; 1015 return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 1016 p->phy_interface); 1017 } 1018 1019 static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 1020 struct net_device *slave_dev) 1021 { 1022 struct dsa_switch *ds = p->dp->ds; 1023 struct device_node *phy_dn, *port_dn; 1024 bool phy_is_fixed = false; 1025 u32 phy_flags = 0; 1026 int mode, ret; 1027 1028 port_dn = p->dp->dn; 1029 mode = of_get_phy_mode(port_dn); 1030 if (mode < 0) 1031 mode = PHY_INTERFACE_MODE_NA; 1032 p->phy_interface = mode; 1033 1034 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1035 if (!phy_dn && of_phy_is_fixed_link(port_dn)) { 1036 /* In the case of a fixed PHY, the DT node associated 1037 * to the fixed PHY is the Port DT node 1038 */ 1039 ret = of_phy_register_fixed_link(port_dn); 1040 if (ret) { 1041 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1042 return ret; 1043 } 1044 phy_is_fixed = true; 1045 phy_dn = of_node_get(port_dn); 1046 } 1047 1048 if (ds->ops->get_phy_flags) 1049 phy_flags = ds->ops->get_phy_flags(ds, p->dp->index); 1050 1051 if (phy_dn) { 1052 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 1053 1054 /* If this PHY address is part of phys_mii_mask, which means 1055 * that we need to divert reads and writes to/from it, then we 1056 * want to bind this device using the slave MII bus created by 1057 * DSA to make that happen. 1058 */ 1059 if (!phy_is_fixed && phy_id >= 0 && 1060 (ds->phys_mii_mask & (1 << phy_id))) { 1061 ret = dsa_slave_phy_connect(p, slave_dev, phy_id); 1062 if (ret) { 1063 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); 1064 of_node_put(phy_dn); 1065 return ret; 1066 } 1067 } else { 1068 p->phy = of_phy_connect(slave_dev, phy_dn, 1069 dsa_slave_adjust_link, 1070 phy_flags, 1071 p->phy_interface); 1072 } 1073 1074 of_node_put(phy_dn); 1075 } 1076 1077 if (p->phy && phy_is_fixed) 1078 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 1079 1080 /* We could not connect to a designated PHY, so use the switch internal 1081 * MDIO bus instead 1082 */ 1083 if (!p->phy) { 1084 ret = dsa_slave_phy_connect(p, slave_dev, p->dp->index); 1085 if (ret) { 1086 netdev_err(slave_dev, "failed to connect to port %d: %d\n", 1087 p->dp->index, ret); 1088 if (phy_is_fixed) 1089 of_phy_deregister_fixed_link(port_dn); 1090 return ret; 1091 } 1092 } 1093 1094 phy_attached_info(p->phy); 1095 1096 return 0; 1097 } 1098 1099 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1100 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1101 struct netdev_queue *txq, 1102 void *_unused) 1103 { 1104 lockdep_set_class(&txq->_xmit_lock, 1105 &dsa_slave_netdev_xmit_lock_key); 1106 } 1107 1108 int dsa_slave_suspend(struct net_device *slave_dev) 1109 { 1110 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1111 1112 netif_device_detach(slave_dev); 1113 1114 if (p->phy) { 1115 phy_stop(p->phy); 1116 p->old_pause = -1; 1117 p->old_link = -1; 1118 p->old_duplex = -1; 1119 phy_suspend(p->phy); 1120 } 1121 1122 return 0; 1123 } 1124 1125 int dsa_slave_resume(struct net_device *slave_dev) 1126 { 1127 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1128 1129 netif_device_attach(slave_dev); 1130 1131 if (p->phy) { 1132 phy_resume(p->phy); 1133 phy_start(p->phy); 1134 } 1135 1136 return 0; 1137 } 1138 1139 int dsa_slave_create(struct dsa_switch *ds, struct device *parent, 1140 int port, const char *name) 1141 { 1142 struct dsa_switch_tree *dst = ds->dst; 1143 struct net_device *master; 1144 struct net_device *slave_dev; 1145 struct dsa_slave_priv *p; 1146 struct dsa_port *cpu_dp; 1147 int ret; 1148 1149 cpu_dp = ds->dst->cpu_dp; 1150 master = cpu_dp->netdev; 1151 1152 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, 1153 NET_NAME_UNKNOWN, ether_setup); 1154 if (slave_dev == NULL) 1155 return -ENOMEM; 1156 1157 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1158 slave_dev->hw_features |= NETIF_F_HW_TC; 1159 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1160 eth_hw_addr_inherit(slave_dev, master); 1161 slave_dev->priv_flags |= IFF_NO_QUEUE; 1162 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1163 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1164 slave_dev->min_mtu = 0; 1165 slave_dev->max_mtu = ETH_MAX_MTU; 1166 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1167 1168 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1169 NULL); 1170 1171 SET_NETDEV_DEV(slave_dev, parent); 1172 slave_dev->dev.of_node = ds->ports[port].dn; 1173 slave_dev->vlan_features = master->vlan_features; 1174 1175 p = netdev_priv(slave_dev); 1176 p->dp = &ds->ports[port]; 1177 INIT_LIST_HEAD(&p->mall_tc_list); 1178 p->xmit = dst->tag_ops->xmit; 1179 1180 p->old_pause = -1; 1181 p->old_link = -1; 1182 p->old_duplex = -1; 1183 1184 ds->ports[port].netdev = slave_dev; 1185 ret = register_netdev(slave_dev); 1186 if (ret) { 1187 netdev_err(master, "error %d registering interface %s\n", 1188 ret, slave_dev->name); 1189 ds->ports[port].netdev = NULL; 1190 free_netdev(slave_dev); 1191 return ret; 1192 } 1193 1194 netif_carrier_off(slave_dev); 1195 1196 ret = dsa_slave_phy_setup(p, slave_dev); 1197 if (ret) { 1198 netdev_err(master, "error %d setting up slave phy\n", ret); 1199 unregister_netdev(slave_dev); 1200 free_netdev(slave_dev); 1201 return ret; 1202 } 1203 1204 return 0; 1205 } 1206 1207 void dsa_slave_destroy(struct net_device *slave_dev) 1208 { 1209 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1210 struct device_node *port_dn; 1211 1212 port_dn = p->dp->dn; 1213 1214 netif_carrier_off(slave_dev); 1215 if (p->phy) { 1216 phy_disconnect(p->phy); 1217 1218 if (of_phy_is_fixed_link(port_dn)) 1219 of_phy_deregister_fixed_link(port_dn); 1220 } 1221 unregister_netdev(slave_dev); 1222 free_netdev(slave_dev); 1223 } 1224 1225 static bool dsa_slave_dev_check(struct net_device *dev) 1226 { 1227 return dev->netdev_ops == &dsa_slave_netdev_ops; 1228 } 1229 1230 static int dsa_slave_changeupper(struct net_device *dev, 1231 struct netdev_notifier_changeupper_info *info) 1232 { 1233 struct dsa_slave_priv *p = netdev_priv(dev); 1234 struct dsa_port *dp = p->dp; 1235 int err = NOTIFY_DONE; 1236 1237 if (netif_is_bridge_master(info->upper_dev)) { 1238 if (info->linking) { 1239 err = dsa_port_bridge_join(dp, info->upper_dev); 1240 err = notifier_from_errno(err); 1241 } else { 1242 dsa_port_bridge_leave(dp, info->upper_dev); 1243 err = NOTIFY_OK; 1244 } 1245 } 1246 1247 return err; 1248 } 1249 1250 static int dsa_slave_netdevice_event(struct notifier_block *nb, 1251 unsigned long event, void *ptr) 1252 { 1253 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1254 1255 if (dev->netdev_ops != &dsa_slave_netdev_ops) 1256 return NOTIFY_DONE; 1257 1258 if (event == NETDEV_CHANGEUPPER) 1259 return dsa_slave_changeupper(dev, ptr); 1260 1261 return NOTIFY_DONE; 1262 } 1263 1264 static struct notifier_block dsa_slave_nb __read_mostly = { 1265 .notifier_call = dsa_slave_netdevice_event, 1266 }; 1267 1268 int dsa_slave_register_notifier(void) 1269 { 1270 return register_netdevice_notifier(&dsa_slave_nb); 1271 } 1272 1273 void dsa_slave_unregister_notifier(void) 1274 { 1275 int err; 1276 1277 err = unregister_netdevice_notifier(&dsa_slave_nb); 1278 if (err) 1279 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 1280 } 1281