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 if (!ds->ops->set_eee) 652 return -EOPNOTSUPP; 653 654 ret = ds->ops->set_eee(ds, p->dp->index, p->phy, e); 655 if (ret) 656 return ret; 657 658 if (p->phy) 659 ret = phy_ethtool_set_eee(p->phy, e); 660 661 return ret; 662 } 663 664 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 665 { 666 struct dsa_slave_priv *p = netdev_priv(dev); 667 struct dsa_switch *ds = p->dp->ds; 668 int ret; 669 670 if (!ds->ops->get_eee) 671 return -EOPNOTSUPP; 672 673 ret = ds->ops->get_eee(ds, p->dp->index, e); 674 if (ret) 675 return ret; 676 677 if (p->phy) 678 ret = phy_ethtool_get_eee(p->phy, e); 679 680 return ret; 681 } 682 683 #ifdef CONFIG_NET_POLL_CONTROLLER 684 static int dsa_slave_netpoll_setup(struct net_device *dev, 685 struct netpoll_info *ni) 686 { 687 struct dsa_slave_priv *p = netdev_priv(dev); 688 struct net_device *master = dsa_master_netdev(p); 689 struct netpoll *netpoll; 690 int err = 0; 691 692 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 693 if (!netpoll) 694 return -ENOMEM; 695 696 err = __netpoll_setup(netpoll, master); 697 if (err) { 698 kfree(netpoll); 699 goto out; 700 } 701 702 p->netpoll = netpoll; 703 out: 704 return err; 705 } 706 707 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 708 { 709 struct dsa_slave_priv *p = netdev_priv(dev); 710 struct netpoll *netpoll = p->netpoll; 711 712 if (!netpoll) 713 return; 714 715 p->netpoll = NULL; 716 717 __netpoll_free_async(netpoll); 718 } 719 720 static void dsa_slave_poll_controller(struct net_device *dev) 721 { 722 } 723 #endif 724 725 static int dsa_slave_get_phys_port_name(struct net_device *dev, 726 char *name, size_t len) 727 { 728 struct dsa_slave_priv *p = netdev_priv(dev); 729 730 if (snprintf(name, len, "p%d", p->dp->index) >= len) 731 return -EINVAL; 732 733 return 0; 734 } 735 736 static struct dsa_mall_tc_entry * 737 dsa_slave_mall_tc_entry_find(struct dsa_slave_priv *p, 738 unsigned long cookie) 739 { 740 struct dsa_mall_tc_entry *mall_tc_entry; 741 742 list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) 743 if (mall_tc_entry->cookie == cookie) 744 return mall_tc_entry; 745 746 return NULL; 747 } 748 749 static int dsa_slave_add_cls_matchall(struct net_device *dev, 750 __be16 protocol, 751 struct tc_cls_matchall_offload *cls, 752 bool ingress) 753 { 754 struct dsa_slave_priv *p = netdev_priv(dev); 755 struct dsa_mall_tc_entry *mall_tc_entry; 756 struct dsa_switch *ds = p->dp->ds; 757 struct net *net = dev_net(dev); 758 struct dsa_slave_priv *to_p; 759 struct net_device *to_dev; 760 const struct tc_action *a; 761 int err = -EOPNOTSUPP; 762 LIST_HEAD(actions); 763 int ifindex; 764 765 if (!ds->ops->port_mirror_add) 766 return err; 767 768 if (!tc_single_action(cls->exts)) 769 return err; 770 771 tcf_exts_to_list(cls->exts, &actions); 772 a = list_first_entry(&actions, struct tc_action, list); 773 774 if (is_tcf_mirred_egress_mirror(a) && protocol == htons(ETH_P_ALL)) { 775 struct dsa_mall_mirror_tc_entry *mirror; 776 777 ifindex = tcf_mirred_ifindex(a); 778 to_dev = __dev_get_by_index(net, ifindex); 779 if (!to_dev) 780 return -EINVAL; 781 782 if (!dsa_slave_dev_check(to_dev)) 783 return -EOPNOTSUPP; 784 785 mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL); 786 if (!mall_tc_entry) 787 return -ENOMEM; 788 789 mall_tc_entry->cookie = cls->cookie; 790 mall_tc_entry->type = DSA_PORT_MALL_MIRROR; 791 mirror = &mall_tc_entry->mirror; 792 793 to_p = netdev_priv(to_dev); 794 795 mirror->to_local_port = to_p->dp->index; 796 mirror->ingress = ingress; 797 798 err = ds->ops->port_mirror_add(ds, p->dp->index, mirror, 799 ingress); 800 if (err) { 801 kfree(mall_tc_entry); 802 return err; 803 } 804 805 list_add_tail(&mall_tc_entry->list, &p->mall_tc_list); 806 } 807 808 return 0; 809 } 810 811 static void dsa_slave_del_cls_matchall(struct net_device *dev, 812 struct tc_cls_matchall_offload *cls) 813 { 814 struct dsa_slave_priv *p = netdev_priv(dev); 815 struct dsa_mall_tc_entry *mall_tc_entry; 816 struct dsa_switch *ds = p->dp->ds; 817 818 if (!ds->ops->port_mirror_del) 819 return; 820 821 mall_tc_entry = dsa_slave_mall_tc_entry_find(p, cls->cookie); 822 if (!mall_tc_entry) 823 return; 824 825 list_del(&mall_tc_entry->list); 826 827 switch (mall_tc_entry->type) { 828 case DSA_PORT_MALL_MIRROR: 829 ds->ops->port_mirror_del(ds, p->dp->index, 830 &mall_tc_entry->mirror); 831 break; 832 default: 833 WARN_ON(1); 834 } 835 836 kfree(mall_tc_entry); 837 } 838 839 static int dsa_slave_setup_tc(struct net_device *dev, u32 handle, 840 u32 chain_index, __be16 protocol, 841 struct tc_to_netdev *tc) 842 { 843 bool ingress = TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS); 844 845 if (chain_index) 846 return -EOPNOTSUPP; 847 848 switch (tc->type) { 849 case TC_SETUP_MATCHALL: 850 switch (tc->cls_mall->command) { 851 case TC_CLSMATCHALL_REPLACE: 852 return dsa_slave_add_cls_matchall(dev, protocol, 853 tc->cls_mall, 854 ingress); 855 case TC_CLSMATCHALL_DESTROY: 856 dsa_slave_del_cls_matchall(dev, tc->cls_mall); 857 return 0; 858 } 859 default: 860 return -EOPNOTSUPP; 861 } 862 } 863 864 void dsa_cpu_port_ethtool_init(struct ethtool_ops *ops) 865 { 866 ops->get_sset_count = dsa_cpu_port_get_sset_count; 867 ops->get_ethtool_stats = dsa_cpu_port_get_ethtool_stats; 868 ops->get_strings = dsa_cpu_port_get_strings; 869 } 870 871 static int dsa_slave_get_rxnfc(struct net_device *dev, 872 struct ethtool_rxnfc *nfc, u32 *rule_locs) 873 { 874 struct dsa_slave_priv *p = netdev_priv(dev); 875 struct dsa_switch *ds = p->dp->ds; 876 877 if (!ds->ops->get_rxnfc) 878 return -EOPNOTSUPP; 879 880 return ds->ops->get_rxnfc(ds, p->dp->index, nfc, rule_locs); 881 } 882 883 static int dsa_slave_set_rxnfc(struct net_device *dev, 884 struct ethtool_rxnfc *nfc) 885 { 886 struct dsa_slave_priv *p = netdev_priv(dev); 887 struct dsa_switch *ds = p->dp->ds; 888 889 if (!ds->ops->set_rxnfc) 890 return -EOPNOTSUPP; 891 892 return ds->ops->set_rxnfc(ds, p->dp->index, nfc); 893 } 894 895 static const struct ethtool_ops dsa_slave_ethtool_ops = { 896 .get_drvinfo = dsa_slave_get_drvinfo, 897 .get_regs_len = dsa_slave_get_regs_len, 898 .get_regs = dsa_slave_get_regs, 899 .nway_reset = dsa_slave_nway_reset, 900 .get_link = dsa_slave_get_link, 901 .get_eeprom_len = dsa_slave_get_eeprom_len, 902 .get_eeprom = dsa_slave_get_eeprom, 903 .set_eeprom = dsa_slave_set_eeprom, 904 .get_strings = dsa_slave_get_strings, 905 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 906 .get_sset_count = dsa_slave_get_sset_count, 907 .set_wol = dsa_slave_set_wol, 908 .get_wol = dsa_slave_get_wol, 909 .set_eee = dsa_slave_set_eee, 910 .get_eee = dsa_slave_get_eee, 911 .get_link_ksettings = dsa_slave_get_link_ksettings, 912 .set_link_ksettings = dsa_slave_set_link_ksettings, 913 .get_rxnfc = dsa_slave_get_rxnfc, 914 .set_rxnfc = dsa_slave_set_rxnfc, 915 }; 916 917 static const struct net_device_ops dsa_slave_netdev_ops = { 918 .ndo_open = dsa_slave_open, 919 .ndo_stop = dsa_slave_close, 920 .ndo_start_xmit = dsa_slave_xmit, 921 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 922 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 923 .ndo_set_mac_address = dsa_slave_set_mac_address, 924 .ndo_fdb_add = switchdev_port_fdb_add, 925 .ndo_fdb_del = switchdev_port_fdb_del, 926 .ndo_fdb_dump = switchdev_port_fdb_dump, 927 .ndo_do_ioctl = dsa_slave_ioctl, 928 .ndo_get_iflink = dsa_slave_get_iflink, 929 #ifdef CONFIG_NET_POLL_CONTROLLER 930 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 931 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 932 .ndo_poll_controller = dsa_slave_poll_controller, 933 #endif 934 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 935 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 936 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 937 .ndo_get_phys_port_name = dsa_slave_get_phys_port_name, 938 .ndo_setup_tc = dsa_slave_setup_tc, 939 }; 940 941 static const struct switchdev_ops dsa_slave_switchdev_ops = { 942 .switchdev_port_attr_get = dsa_slave_port_attr_get, 943 .switchdev_port_attr_set = dsa_slave_port_attr_set, 944 .switchdev_port_obj_add = dsa_slave_port_obj_add, 945 .switchdev_port_obj_del = dsa_slave_port_obj_del, 946 .switchdev_port_obj_dump = dsa_slave_port_obj_dump, 947 }; 948 949 static struct device_type dsa_type = { 950 .name = "dsa", 951 }; 952 953 static void dsa_slave_adjust_link(struct net_device *dev) 954 { 955 struct dsa_slave_priv *p = netdev_priv(dev); 956 struct dsa_switch *ds = p->dp->ds; 957 unsigned int status_changed = 0; 958 959 if (p->old_link != p->phy->link) { 960 status_changed = 1; 961 p->old_link = p->phy->link; 962 } 963 964 if (p->old_duplex != p->phy->duplex) { 965 status_changed = 1; 966 p->old_duplex = p->phy->duplex; 967 } 968 969 if (p->old_pause != p->phy->pause) { 970 status_changed = 1; 971 p->old_pause = p->phy->pause; 972 } 973 974 if (ds->ops->adjust_link && status_changed) 975 ds->ops->adjust_link(ds, p->dp->index, p->phy); 976 977 if (status_changed) 978 phy_print_status(p->phy); 979 } 980 981 static int dsa_slave_fixed_link_update(struct net_device *dev, 982 struct fixed_phy_status *status) 983 { 984 struct dsa_slave_priv *p; 985 struct dsa_switch *ds; 986 987 if (dev) { 988 p = netdev_priv(dev); 989 ds = p->dp->ds; 990 if (ds->ops->fixed_link_update) 991 ds->ops->fixed_link_update(ds, p->dp->index, status); 992 } 993 994 return 0; 995 } 996 997 /* slave device setup *******************************************************/ 998 static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 999 struct net_device *slave_dev, 1000 int addr) 1001 { 1002 struct dsa_switch *ds = p->dp->ds; 1003 1004 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr); 1005 if (!p->phy) { 1006 netdev_err(slave_dev, "no phy at %d\n", addr); 1007 return -ENODEV; 1008 } 1009 1010 /* Use already configured phy mode */ 1011 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 1012 p->phy_interface = p->phy->interface; 1013 return phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 1014 p->phy_interface); 1015 } 1016 1017 static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 1018 struct net_device *slave_dev) 1019 { 1020 struct dsa_switch *ds = p->dp->ds; 1021 struct device_node *phy_dn, *port_dn; 1022 bool phy_is_fixed = false; 1023 u32 phy_flags = 0; 1024 int mode, ret; 1025 1026 port_dn = p->dp->dn; 1027 mode = of_get_phy_mode(port_dn); 1028 if (mode < 0) 1029 mode = PHY_INTERFACE_MODE_NA; 1030 p->phy_interface = mode; 1031 1032 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1033 if (!phy_dn && of_phy_is_fixed_link(port_dn)) { 1034 /* In the case of a fixed PHY, the DT node associated 1035 * to the fixed PHY is the Port DT node 1036 */ 1037 ret = of_phy_register_fixed_link(port_dn); 1038 if (ret) { 1039 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1040 return ret; 1041 } 1042 phy_is_fixed = true; 1043 phy_dn = of_node_get(port_dn); 1044 } 1045 1046 if (ds->ops->get_phy_flags) 1047 phy_flags = ds->ops->get_phy_flags(ds, p->dp->index); 1048 1049 if (phy_dn) { 1050 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 1051 1052 /* If this PHY address is part of phys_mii_mask, which means 1053 * that we need to divert reads and writes to/from it, then we 1054 * want to bind this device using the slave MII bus created by 1055 * DSA to make that happen. 1056 */ 1057 if (!phy_is_fixed && phy_id >= 0 && 1058 (ds->phys_mii_mask & (1 << phy_id))) { 1059 ret = dsa_slave_phy_connect(p, slave_dev, phy_id); 1060 if (ret) { 1061 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); 1062 of_node_put(phy_dn); 1063 return ret; 1064 } 1065 } else { 1066 p->phy = of_phy_connect(slave_dev, phy_dn, 1067 dsa_slave_adjust_link, 1068 phy_flags, 1069 p->phy_interface); 1070 } 1071 1072 of_node_put(phy_dn); 1073 } 1074 1075 if (p->phy && phy_is_fixed) 1076 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 1077 1078 /* We could not connect to a designated PHY, so use the switch internal 1079 * MDIO bus instead 1080 */ 1081 if (!p->phy) { 1082 ret = dsa_slave_phy_connect(p, slave_dev, p->dp->index); 1083 if (ret) { 1084 netdev_err(slave_dev, "failed to connect to port %d: %d\n", 1085 p->dp->index, ret); 1086 if (phy_is_fixed) 1087 of_phy_deregister_fixed_link(port_dn); 1088 return ret; 1089 } 1090 } 1091 1092 phy_attached_info(p->phy); 1093 1094 return 0; 1095 } 1096 1097 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1098 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1099 struct netdev_queue *txq, 1100 void *_unused) 1101 { 1102 lockdep_set_class(&txq->_xmit_lock, 1103 &dsa_slave_netdev_xmit_lock_key); 1104 } 1105 1106 int dsa_slave_suspend(struct net_device *slave_dev) 1107 { 1108 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1109 1110 netif_device_detach(slave_dev); 1111 1112 if (p->phy) { 1113 phy_stop(p->phy); 1114 p->old_pause = -1; 1115 p->old_link = -1; 1116 p->old_duplex = -1; 1117 phy_suspend(p->phy); 1118 } 1119 1120 return 0; 1121 } 1122 1123 int dsa_slave_resume(struct net_device *slave_dev) 1124 { 1125 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1126 1127 netif_device_attach(slave_dev); 1128 1129 if (p->phy) { 1130 phy_resume(p->phy); 1131 phy_start(p->phy); 1132 } 1133 1134 return 0; 1135 } 1136 1137 int dsa_slave_create(struct dsa_switch *ds, struct device *parent, 1138 int port, const char *name) 1139 { 1140 struct dsa_switch_tree *dst = ds->dst; 1141 struct net_device *master; 1142 struct net_device *slave_dev; 1143 struct dsa_slave_priv *p; 1144 struct dsa_port *cpu_dp; 1145 int ret; 1146 1147 cpu_dp = ds->dst->cpu_dp; 1148 master = cpu_dp->netdev; 1149 1150 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, 1151 NET_NAME_UNKNOWN, ether_setup); 1152 if (slave_dev == NULL) 1153 return -ENOMEM; 1154 1155 slave_dev->features = master->vlan_features | NETIF_F_HW_TC; 1156 slave_dev->hw_features |= NETIF_F_HW_TC; 1157 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1158 eth_hw_addr_inherit(slave_dev, master); 1159 slave_dev->priv_flags |= IFF_NO_QUEUE; 1160 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1161 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1162 slave_dev->min_mtu = 0; 1163 slave_dev->max_mtu = ETH_MAX_MTU; 1164 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1165 1166 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1167 NULL); 1168 1169 SET_NETDEV_DEV(slave_dev, parent); 1170 slave_dev->dev.of_node = ds->ports[port].dn; 1171 slave_dev->vlan_features = master->vlan_features; 1172 1173 p = netdev_priv(slave_dev); 1174 p->dp = &ds->ports[port]; 1175 INIT_LIST_HEAD(&p->mall_tc_list); 1176 p->xmit = dst->tag_ops->xmit; 1177 1178 p->old_pause = -1; 1179 p->old_link = -1; 1180 p->old_duplex = -1; 1181 1182 ds->ports[port].netdev = slave_dev; 1183 ret = register_netdev(slave_dev); 1184 if (ret) { 1185 netdev_err(master, "error %d registering interface %s\n", 1186 ret, slave_dev->name); 1187 ds->ports[port].netdev = NULL; 1188 free_netdev(slave_dev); 1189 return ret; 1190 } 1191 1192 netif_carrier_off(slave_dev); 1193 1194 ret = dsa_slave_phy_setup(p, slave_dev); 1195 if (ret) { 1196 netdev_err(master, "error %d setting up slave phy\n", ret); 1197 unregister_netdev(slave_dev); 1198 free_netdev(slave_dev); 1199 return ret; 1200 } 1201 1202 return 0; 1203 } 1204 1205 void dsa_slave_destroy(struct net_device *slave_dev) 1206 { 1207 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1208 struct device_node *port_dn; 1209 1210 port_dn = p->dp->dn; 1211 1212 netif_carrier_off(slave_dev); 1213 if (p->phy) { 1214 phy_disconnect(p->phy); 1215 1216 if (of_phy_is_fixed_link(port_dn)) 1217 of_phy_deregister_fixed_link(port_dn); 1218 } 1219 unregister_netdev(slave_dev); 1220 free_netdev(slave_dev); 1221 } 1222 1223 static bool dsa_slave_dev_check(struct net_device *dev) 1224 { 1225 return dev->netdev_ops == &dsa_slave_netdev_ops; 1226 } 1227 1228 static int dsa_slave_changeupper(struct net_device *dev, 1229 struct netdev_notifier_changeupper_info *info) 1230 { 1231 struct dsa_slave_priv *p = netdev_priv(dev); 1232 struct dsa_port *dp = p->dp; 1233 int err = NOTIFY_DONE; 1234 1235 if (netif_is_bridge_master(info->upper_dev)) { 1236 if (info->linking) { 1237 err = dsa_port_bridge_join(dp, info->upper_dev); 1238 err = notifier_from_errno(err); 1239 } else { 1240 dsa_port_bridge_leave(dp, info->upper_dev); 1241 err = NOTIFY_OK; 1242 } 1243 } 1244 1245 return err; 1246 } 1247 1248 static int dsa_slave_netdevice_event(struct notifier_block *nb, 1249 unsigned long event, void *ptr) 1250 { 1251 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1252 1253 if (dev->netdev_ops != &dsa_slave_netdev_ops) 1254 return NOTIFY_DONE; 1255 1256 if (event == NETDEV_CHANGEUPPER) 1257 return dsa_slave_changeupper(dev, ptr); 1258 1259 return NOTIFY_DONE; 1260 } 1261 1262 static struct notifier_block dsa_slave_nb __read_mostly = { 1263 .notifier_call = dsa_slave_netdevice_event, 1264 }; 1265 1266 int dsa_slave_register_notifier(void) 1267 { 1268 return register_netdevice_notifier(&dsa_slave_nb); 1269 } 1270 1271 void dsa_slave_unregister_notifier(void) 1272 { 1273 int err; 1274 1275 err = unregister_netdevice_notifier(&dsa_slave_nb); 1276 if (err) 1277 pr_err("DSA: failed to unregister slave notifier (%d)\n", err); 1278 } 1279