1 /* 2 * net/dsa/slave.c - Slave device handling 3 * Copyright (c) 2008-2009 Marvell Semiconductor 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11 #include <linux/list.h> 12 #include <linux/etherdevice.h> 13 #include <linux/netdevice.h> 14 #include <linux/phy.h> 15 #include <linux/phy_fixed.h> 16 #include <linux/of_net.h> 17 #include <linux/of_mdio.h> 18 #include <linux/mdio.h> 19 #include <net/rtnetlink.h> 20 #include <net/switchdev.h> 21 #include <linux/if_bridge.h> 22 #include <linux/netpoll.h> 23 #include "dsa_priv.h" 24 25 /* slave mii_bus handling ***************************************************/ 26 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) 27 { 28 struct dsa_switch *ds = bus->priv; 29 30 if (ds->phys_mii_mask & (1 << addr)) 31 return ds->drv->phy_read(ds, addr, reg); 32 33 return 0xffff; 34 } 35 36 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) 37 { 38 struct dsa_switch *ds = bus->priv; 39 40 if (ds->phys_mii_mask & (1 << addr)) 41 return ds->drv->phy_write(ds, addr, reg, val); 42 43 return 0; 44 } 45 46 void dsa_slave_mii_bus_init(struct dsa_switch *ds) 47 { 48 ds->slave_mii_bus->priv = (void *)ds; 49 ds->slave_mii_bus->name = "dsa slave smi"; 50 ds->slave_mii_bus->read = dsa_slave_phy_read; 51 ds->slave_mii_bus->write = dsa_slave_phy_write; 52 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x", 53 ds->index, ds->cd->sw_addr); 54 ds->slave_mii_bus->parent = ds->dev; 55 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask; 56 } 57 58 59 /* slave device handling ****************************************************/ 60 static int dsa_slave_get_iflink(const struct net_device *dev) 61 { 62 struct dsa_slave_priv *p = netdev_priv(dev); 63 64 return p->parent->dst->master_netdev->ifindex; 65 } 66 67 static inline bool dsa_port_is_bridged(struct dsa_slave_priv *p) 68 { 69 return !!p->bridge_dev; 70 } 71 72 static int dsa_slave_open(struct net_device *dev) 73 { 74 struct dsa_slave_priv *p = netdev_priv(dev); 75 struct net_device *master = p->parent->dst->master_netdev; 76 struct dsa_switch *ds = p->parent; 77 u8 stp_state = dsa_port_is_bridged(p) ? 78 BR_STATE_BLOCKING : BR_STATE_FORWARDING; 79 int err; 80 81 if (!(master->flags & IFF_UP)) 82 return -ENETDOWN; 83 84 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { 85 err = dev_uc_add(master, dev->dev_addr); 86 if (err < 0) 87 goto out; 88 } 89 90 if (dev->flags & IFF_ALLMULTI) { 91 err = dev_set_allmulti(master, 1); 92 if (err < 0) 93 goto del_unicast; 94 } 95 if (dev->flags & IFF_PROMISC) { 96 err = dev_set_promiscuity(master, 1); 97 if (err < 0) 98 goto clear_allmulti; 99 } 100 101 if (ds->drv->port_enable) { 102 err = ds->drv->port_enable(ds, p->port, p->phy); 103 if (err) 104 goto clear_promisc; 105 } 106 107 if (ds->drv->port_stp_state_set) 108 ds->drv->port_stp_state_set(ds, p->port, stp_state); 109 110 if (p->phy) 111 phy_start(p->phy); 112 113 return 0; 114 115 clear_promisc: 116 if (dev->flags & IFF_PROMISC) 117 dev_set_promiscuity(master, -1); 118 clear_allmulti: 119 if (dev->flags & IFF_ALLMULTI) 120 dev_set_allmulti(master, -1); 121 del_unicast: 122 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 123 dev_uc_del(master, dev->dev_addr); 124 out: 125 return err; 126 } 127 128 static int dsa_slave_close(struct net_device *dev) 129 { 130 struct dsa_slave_priv *p = netdev_priv(dev); 131 struct net_device *master = p->parent->dst->master_netdev; 132 struct dsa_switch *ds = p->parent; 133 134 if (p->phy) 135 phy_stop(p->phy); 136 137 dev_mc_unsync(master, dev); 138 dev_uc_unsync(master, dev); 139 if (dev->flags & IFF_ALLMULTI) 140 dev_set_allmulti(master, -1); 141 if (dev->flags & IFF_PROMISC) 142 dev_set_promiscuity(master, -1); 143 144 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 145 dev_uc_del(master, dev->dev_addr); 146 147 if (ds->drv->port_disable) 148 ds->drv->port_disable(ds, p->port, p->phy); 149 150 if (ds->drv->port_stp_state_set) 151 ds->drv->port_stp_state_set(ds, p->port, BR_STATE_DISABLED); 152 153 return 0; 154 } 155 156 static void dsa_slave_change_rx_flags(struct net_device *dev, int change) 157 { 158 struct dsa_slave_priv *p = netdev_priv(dev); 159 struct net_device *master = p->parent->dst->master_netdev; 160 161 if (change & IFF_ALLMULTI) 162 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); 163 if (change & IFF_PROMISC) 164 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); 165 } 166 167 static void dsa_slave_set_rx_mode(struct net_device *dev) 168 { 169 struct dsa_slave_priv *p = netdev_priv(dev); 170 struct net_device *master = p->parent->dst->master_netdev; 171 172 dev_mc_sync(master, dev); 173 dev_uc_sync(master, dev); 174 } 175 176 static int dsa_slave_set_mac_address(struct net_device *dev, void *a) 177 { 178 struct dsa_slave_priv *p = netdev_priv(dev); 179 struct net_device *master = p->parent->dst->master_netdev; 180 struct sockaddr *addr = a; 181 int err; 182 183 if (!is_valid_ether_addr(addr->sa_data)) 184 return -EADDRNOTAVAIL; 185 186 if (!(dev->flags & IFF_UP)) 187 goto out; 188 189 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { 190 err = dev_uc_add(master, addr->sa_data); 191 if (err < 0) 192 return err; 193 } 194 195 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) 196 dev_uc_del(master, dev->dev_addr); 197 198 out: 199 ether_addr_copy(dev->dev_addr, addr->sa_data); 200 201 return 0; 202 } 203 204 static int dsa_slave_port_vlan_add(struct net_device *dev, 205 const struct switchdev_obj_port_vlan *vlan, 206 struct switchdev_trans *trans) 207 { 208 struct dsa_slave_priv *p = netdev_priv(dev); 209 struct dsa_switch *ds = p->parent; 210 211 if (switchdev_trans_ph_prepare(trans)) { 212 if (!ds->drv->port_vlan_prepare || !ds->drv->port_vlan_add) 213 return -EOPNOTSUPP; 214 215 return ds->drv->port_vlan_prepare(ds, p->port, vlan, trans); 216 } 217 218 ds->drv->port_vlan_add(ds, p->port, vlan, trans); 219 220 return 0; 221 } 222 223 static int dsa_slave_port_vlan_del(struct net_device *dev, 224 const struct switchdev_obj_port_vlan *vlan) 225 { 226 struct dsa_slave_priv *p = netdev_priv(dev); 227 struct dsa_switch *ds = p->parent; 228 229 if (!ds->drv->port_vlan_del) 230 return -EOPNOTSUPP; 231 232 return ds->drv->port_vlan_del(ds, p->port, vlan); 233 } 234 235 static int dsa_slave_port_vlan_dump(struct net_device *dev, 236 struct switchdev_obj_port_vlan *vlan, 237 switchdev_obj_dump_cb_t *cb) 238 { 239 struct dsa_slave_priv *p = netdev_priv(dev); 240 struct dsa_switch *ds = p->parent; 241 242 if (ds->drv->port_vlan_dump) 243 return ds->drv->port_vlan_dump(ds, p->port, vlan, cb); 244 245 return -EOPNOTSUPP; 246 } 247 248 static int dsa_slave_port_fdb_add(struct net_device *dev, 249 const struct switchdev_obj_port_fdb *fdb, 250 struct switchdev_trans *trans) 251 { 252 struct dsa_slave_priv *p = netdev_priv(dev); 253 struct dsa_switch *ds = p->parent; 254 255 if (switchdev_trans_ph_prepare(trans)) { 256 if (!ds->drv->port_fdb_prepare || !ds->drv->port_fdb_add) 257 return -EOPNOTSUPP; 258 259 return ds->drv->port_fdb_prepare(ds, p->port, fdb, trans); 260 } 261 262 ds->drv->port_fdb_add(ds, p->port, fdb, trans); 263 264 return 0; 265 } 266 267 static int dsa_slave_port_fdb_del(struct net_device *dev, 268 const struct switchdev_obj_port_fdb *fdb) 269 { 270 struct dsa_slave_priv *p = netdev_priv(dev); 271 struct dsa_switch *ds = p->parent; 272 int ret = -EOPNOTSUPP; 273 274 if (ds->drv->port_fdb_del) 275 ret = ds->drv->port_fdb_del(ds, p->port, fdb); 276 277 return ret; 278 } 279 280 static int dsa_slave_port_fdb_dump(struct net_device *dev, 281 struct switchdev_obj_port_fdb *fdb, 282 switchdev_obj_dump_cb_t *cb) 283 { 284 struct dsa_slave_priv *p = netdev_priv(dev); 285 struct dsa_switch *ds = p->parent; 286 287 if (ds->drv->port_fdb_dump) 288 return ds->drv->port_fdb_dump(ds, p->port, fdb, cb); 289 290 return -EOPNOTSUPP; 291 } 292 293 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 294 { 295 struct dsa_slave_priv *p = netdev_priv(dev); 296 297 if (p->phy != NULL) 298 return phy_mii_ioctl(p->phy, ifr, cmd); 299 300 return -EOPNOTSUPP; 301 } 302 303 static int dsa_slave_stp_state_set(struct net_device *dev, 304 const struct switchdev_attr *attr, 305 struct switchdev_trans *trans) 306 { 307 struct dsa_slave_priv *p = netdev_priv(dev); 308 struct dsa_switch *ds = p->parent; 309 310 if (switchdev_trans_ph_prepare(trans)) 311 return ds->drv->port_stp_state_set ? 0 : -EOPNOTSUPP; 312 313 ds->drv->port_stp_state_set(ds, p->port, attr->u.stp_state); 314 315 return 0; 316 } 317 318 static int dsa_slave_vlan_filtering(struct net_device *dev, 319 const struct switchdev_attr *attr, 320 struct switchdev_trans *trans) 321 { 322 struct dsa_slave_priv *p = netdev_priv(dev); 323 struct dsa_switch *ds = p->parent; 324 325 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */ 326 if (switchdev_trans_ph_prepare(trans)) 327 return 0; 328 329 if (ds->drv->port_vlan_filtering) 330 return ds->drv->port_vlan_filtering(ds, p->port, 331 attr->u.vlan_filtering); 332 333 return 0; 334 } 335 336 static int dsa_slave_port_attr_set(struct net_device *dev, 337 const struct switchdev_attr *attr, 338 struct switchdev_trans *trans) 339 { 340 int ret; 341 342 switch (attr->id) { 343 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 344 ret = dsa_slave_stp_state_set(dev, attr, trans); 345 break; 346 case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: 347 ret = dsa_slave_vlan_filtering(dev, attr, trans); 348 break; 349 default: 350 ret = -EOPNOTSUPP; 351 break; 352 } 353 354 return ret; 355 } 356 357 static int dsa_slave_port_obj_add(struct net_device *dev, 358 const struct switchdev_obj *obj, 359 struct switchdev_trans *trans) 360 { 361 int err; 362 363 /* For the prepare phase, ensure the full set of changes is feasable in 364 * one go in order to signal a failure properly. If an operation is not 365 * supported, return -EOPNOTSUPP. 366 */ 367 368 switch (obj->id) { 369 case SWITCHDEV_OBJ_ID_PORT_FDB: 370 err = dsa_slave_port_fdb_add(dev, 371 SWITCHDEV_OBJ_PORT_FDB(obj), 372 trans); 373 break; 374 case SWITCHDEV_OBJ_ID_PORT_VLAN: 375 err = dsa_slave_port_vlan_add(dev, 376 SWITCHDEV_OBJ_PORT_VLAN(obj), 377 trans); 378 break; 379 default: 380 err = -EOPNOTSUPP; 381 break; 382 } 383 384 return err; 385 } 386 387 static int dsa_slave_port_obj_del(struct net_device *dev, 388 const struct switchdev_obj *obj) 389 { 390 int err; 391 392 switch (obj->id) { 393 case SWITCHDEV_OBJ_ID_PORT_FDB: 394 err = dsa_slave_port_fdb_del(dev, 395 SWITCHDEV_OBJ_PORT_FDB(obj)); 396 break; 397 case SWITCHDEV_OBJ_ID_PORT_VLAN: 398 err = dsa_slave_port_vlan_del(dev, 399 SWITCHDEV_OBJ_PORT_VLAN(obj)); 400 break; 401 default: 402 err = -EOPNOTSUPP; 403 break; 404 } 405 406 return err; 407 } 408 409 static int dsa_slave_port_obj_dump(struct net_device *dev, 410 struct switchdev_obj *obj, 411 switchdev_obj_dump_cb_t *cb) 412 { 413 int err; 414 415 switch (obj->id) { 416 case SWITCHDEV_OBJ_ID_PORT_FDB: 417 err = dsa_slave_port_fdb_dump(dev, 418 SWITCHDEV_OBJ_PORT_FDB(obj), 419 cb); 420 break; 421 case SWITCHDEV_OBJ_ID_PORT_VLAN: 422 err = dsa_slave_port_vlan_dump(dev, 423 SWITCHDEV_OBJ_PORT_VLAN(obj), 424 cb); 425 break; 426 default: 427 err = -EOPNOTSUPP; 428 break; 429 } 430 431 return err; 432 } 433 434 static int dsa_slave_bridge_port_join(struct net_device *dev, 435 struct net_device *br) 436 { 437 struct dsa_slave_priv *p = netdev_priv(dev); 438 struct dsa_switch *ds = p->parent; 439 int ret = -EOPNOTSUPP; 440 441 p->bridge_dev = br; 442 443 if (ds->drv->port_bridge_join) 444 ret = ds->drv->port_bridge_join(ds, p->port, br); 445 446 return ret == -EOPNOTSUPP ? 0 : ret; 447 } 448 449 static void dsa_slave_bridge_port_leave(struct net_device *dev) 450 { 451 struct dsa_slave_priv *p = netdev_priv(dev); 452 struct dsa_switch *ds = p->parent; 453 454 455 if (ds->drv->port_bridge_leave) 456 ds->drv->port_bridge_leave(ds, p->port); 457 458 p->bridge_dev = NULL; 459 460 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer, 461 * so allow it to be in BR_STATE_FORWARDING to be kept functional 462 */ 463 if (ds->drv->port_stp_state_set) 464 ds->drv->port_stp_state_set(ds, p->port, BR_STATE_FORWARDING); 465 } 466 467 static int dsa_slave_port_attr_get(struct net_device *dev, 468 struct switchdev_attr *attr) 469 { 470 struct dsa_slave_priv *p = netdev_priv(dev); 471 struct dsa_switch *ds = p->parent; 472 473 switch (attr->id) { 474 case SWITCHDEV_ATTR_ID_PORT_PARENT_ID: 475 attr->u.ppid.id_len = sizeof(ds->index); 476 memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len); 477 break; 478 default: 479 return -EOPNOTSUPP; 480 } 481 482 return 0; 483 } 484 485 static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p, 486 struct sk_buff *skb) 487 { 488 #ifdef CONFIG_NET_POLL_CONTROLLER 489 if (p->netpoll) 490 netpoll_send_skb(p->netpoll, skb); 491 #else 492 BUG(); 493 #endif 494 return NETDEV_TX_OK; 495 } 496 497 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) 498 { 499 struct dsa_slave_priv *p = netdev_priv(dev); 500 struct sk_buff *nskb; 501 502 dev->stats.tx_packets++; 503 dev->stats.tx_bytes += skb->len; 504 505 /* Transmit function may have to reallocate the original SKB */ 506 nskb = p->xmit(skb, dev); 507 if (!nskb) 508 return NETDEV_TX_OK; 509 510 /* SKB for netpoll still need to be mangled with the protocol-specific 511 * tag to be successfully transmitted 512 */ 513 if (unlikely(netpoll_tx_running(dev))) 514 return dsa_netpoll_send_skb(p, nskb); 515 516 /* Queue the SKB for transmission on the parent interface, but 517 * do not modify its EtherType 518 */ 519 nskb->dev = p->parent->dst->master_netdev; 520 dev_queue_xmit(nskb); 521 522 return NETDEV_TX_OK; 523 } 524 525 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb, 526 struct net_device *dev) 527 { 528 /* Just return the original SKB */ 529 return skb; 530 } 531 532 533 /* ethtool operations *******************************************************/ 534 static int 535 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 536 { 537 struct dsa_slave_priv *p = netdev_priv(dev); 538 int err; 539 540 err = -EOPNOTSUPP; 541 if (p->phy != NULL) { 542 err = phy_read_status(p->phy); 543 if (err == 0) 544 err = phy_ethtool_gset(p->phy, cmd); 545 } 546 547 return err; 548 } 549 550 static int 551 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) 552 { 553 struct dsa_slave_priv *p = netdev_priv(dev); 554 555 if (p->phy != NULL) 556 return phy_ethtool_sset(p->phy, cmd); 557 558 return -EOPNOTSUPP; 559 } 560 561 static void dsa_slave_get_drvinfo(struct net_device *dev, 562 struct ethtool_drvinfo *drvinfo) 563 { 564 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); 565 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version)); 566 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); 567 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); 568 } 569 570 static int dsa_slave_get_regs_len(struct net_device *dev) 571 { 572 struct dsa_slave_priv *p = netdev_priv(dev); 573 struct dsa_switch *ds = p->parent; 574 575 if (ds->drv->get_regs_len) 576 return ds->drv->get_regs_len(ds, p->port); 577 578 return -EOPNOTSUPP; 579 } 580 581 static void 582 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p) 583 { 584 struct dsa_slave_priv *p = netdev_priv(dev); 585 struct dsa_switch *ds = p->parent; 586 587 if (ds->drv->get_regs) 588 ds->drv->get_regs(ds, p->port, regs, _p); 589 } 590 591 static int dsa_slave_nway_reset(struct net_device *dev) 592 { 593 struct dsa_slave_priv *p = netdev_priv(dev); 594 595 if (p->phy != NULL) 596 return genphy_restart_aneg(p->phy); 597 598 return -EOPNOTSUPP; 599 } 600 601 static u32 dsa_slave_get_link(struct net_device *dev) 602 { 603 struct dsa_slave_priv *p = netdev_priv(dev); 604 605 if (p->phy != NULL) { 606 genphy_update_link(p->phy); 607 return p->phy->link; 608 } 609 610 return -EOPNOTSUPP; 611 } 612 613 static int dsa_slave_get_eeprom_len(struct net_device *dev) 614 { 615 struct dsa_slave_priv *p = netdev_priv(dev); 616 struct dsa_switch *ds = p->parent; 617 618 if (ds->cd->eeprom_len) 619 return ds->cd->eeprom_len; 620 621 if (ds->drv->get_eeprom_len) 622 return ds->drv->get_eeprom_len(ds); 623 624 return 0; 625 } 626 627 static int dsa_slave_get_eeprom(struct net_device *dev, 628 struct ethtool_eeprom *eeprom, u8 *data) 629 { 630 struct dsa_slave_priv *p = netdev_priv(dev); 631 struct dsa_switch *ds = p->parent; 632 633 if (ds->drv->get_eeprom) 634 return ds->drv->get_eeprom(ds, eeprom, data); 635 636 return -EOPNOTSUPP; 637 } 638 639 static int dsa_slave_set_eeprom(struct net_device *dev, 640 struct ethtool_eeprom *eeprom, u8 *data) 641 { 642 struct dsa_slave_priv *p = netdev_priv(dev); 643 struct dsa_switch *ds = p->parent; 644 645 if (ds->drv->set_eeprom) 646 return ds->drv->set_eeprom(ds, eeprom, data); 647 648 return -EOPNOTSUPP; 649 } 650 651 static void dsa_slave_get_strings(struct net_device *dev, 652 uint32_t stringset, uint8_t *data) 653 { 654 struct dsa_slave_priv *p = netdev_priv(dev); 655 struct dsa_switch *ds = p->parent; 656 657 if (stringset == ETH_SS_STATS) { 658 int len = ETH_GSTRING_LEN; 659 660 strncpy(data, "tx_packets", len); 661 strncpy(data + len, "tx_bytes", len); 662 strncpy(data + 2 * len, "rx_packets", len); 663 strncpy(data + 3 * len, "rx_bytes", len); 664 if (ds->drv->get_strings != NULL) 665 ds->drv->get_strings(ds, p->port, data + 4 * len); 666 } 667 } 668 669 static void dsa_cpu_port_get_ethtool_stats(struct net_device *dev, 670 struct ethtool_stats *stats, 671 uint64_t *data) 672 { 673 struct dsa_switch_tree *dst = dev->dsa_ptr; 674 struct dsa_switch *ds = dst->ds[0]; 675 s8 cpu_port = dst->cpu_port; 676 int count = 0; 677 678 if (dst->master_ethtool_ops.get_sset_count) { 679 count = dst->master_ethtool_ops.get_sset_count(dev, 680 ETH_SS_STATS); 681 dst->master_ethtool_ops.get_ethtool_stats(dev, stats, data); 682 } 683 684 if (ds->drv->get_ethtool_stats) 685 ds->drv->get_ethtool_stats(ds, cpu_port, data + count); 686 } 687 688 static int dsa_cpu_port_get_sset_count(struct net_device *dev, int sset) 689 { 690 struct dsa_switch_tree *dst = dev->dsa_ptr; 691 struct dsa_switch *ds = dst->ds[0]; 692 int count = 0; 693 694 if (dst->master_ethtool_ops.get_sset_count) 695 count += dst->master_ethtool_ops.get_sset_count(dev, sset); 696 697 if (sset == ETH_SS_STATS && ds->drv->get_sset_count) 698 count += ds->drv->get_sset_count(ds); 699 700 return count; 701 } 702 703 static void dsa_cpu_port_get_strings(struct net_device *dev, 704 uint32_t stringset, uint8_t *data) 705 { 706 struct dsa_switch_tree *dst = dev->dsa_ptr; 707 struct dsa_switch *ds = dst->ds[0]; 708 s8 cpu_port = dst->cpu_port; 709 int len = ETH_GSTRING_LEN; 710 int mcount = 0, count; 711 unsigned int i; 712 uint8_t pfx[4]; 713 uint8_t *ndata; 714 715 snprintf(pfx, sizeof(pfx), "p%.2d", cpu_port); 716 /* We do not want to be NULL-terminated, since this is a prefix */ 717 pfx[sizeof(pfx) - 1] = '_'; 718 719 if (dst->master_ethtool_ops.get_sset_count) { 720 mcount = dst->master_ethtool_ops.get_sset_count(dev, 721 ETH_SS_STATS); 722 dst->master_ethtool_ops.get_strings(dev, stringset, data); 723 } 724 725 if (stringset == ETH_SS_STATS && ds->drv->get_strings) { 726 ndata = data + mcount * len; 727 /* This function copies ETH_GSTRINGS_LEN bytes, we will mangle 728 * the output after to prepend our CPU port prefix we 729 * constructed earlier 730 */ 731 ds->drv->get_strings(ds, cpu_port, ndata); 732 count = ds->drv->get_sset_count(ds); 733 for (i = 0; i < count; i++) { 734 memmove(ndata + (i * len + sizeof(pfx)), 735 ndata + i * len, len - sizeof(pfx)); 736 memcpy(ndata + i * len, pfx, sizeof(pfx)); 737 } 738 } 739 } 740 741 static void dsa_slave_get_ethtool_stats(struct net_device *dev, 742 struct ethtool_stats *stats, 743 uint64_t *data) 744 { 745 struct dsa_slave_priv *p = netdev_priv(dev); 746 struct dsa_switch *ds = p->parent; 747 748 data[0] = dev->stats.tx_packets; 749 data[1] = dev->stats.tx_bytes; 750 data[2] = dev->stats.rx_packets; 751 data[3] = dev->stats.rx_bytes; 752 if (ds->drv->get_ethtool_stats != NULL) 753 ds->drv->get_ethtool_stats(ds, p->port, data + 4); 754 } 755 756 static int dsa_slave_get_sset_count(struct net_device *dev, int sset) 757 { 758 struct dsa_slave_priv *p = netdev_priv(dev); 759 struct dsa_switch *ds = p->parent; 760 761 if (sset == ETH_SS_STATS) { 762 int count; 763 764 count = 4; 765 if (ds->drv->get_sset_count != NULL) 766 count += ds->drv->get_sset_count(ds); 767 768 return count; 769 } 770 771 return -EOPNOTSUPP; 772 } 773 774 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w) 775 { 776 struct dsa_slave_priv *p = netdev_priv(dev); 777 struct dsa_switch *ds = p->parent; 778 779 if (ds->drv->get_wol) 780 ds->drv->get_wol(ds, p->port, w); 781 } 782 783 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w) 784 { 785 struct dsa_slave_priv *p = netdev_priv(dev); 786 struct dsa_switch *ds = p->parent; 787 int ret = -EOPNOTSUPP; 788 789 if (ds->drv->set_wol) 790 ret = ds->drv->set_wol(ds, p->port, w); 791 792 return ret; 793 } 794 795 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e) 796 { 797 struct dsa_slave_priv *p = netdev_priv(dev); 798 struct dsa_switch *ds = p->parent; 799 int ret; 800 801 if (!ds->drv->set_eee) 802 return -EOPNOTSUPP; 803 804 ret = ds->drv->set_eee(ds, p->port, p->phy, e); 805 if (ret) 806 return ret; 807 808 if (p->phy) 809 ret = phy_ethtool_set_eee(p->phy, e); 810 811 return ret; 812 } 813 814 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e) 815 { 816 struct dsa_slave_priv *p = netdev_priv(dev); 817 struct dsa_switch *ds = p->parent; 818 int ret; 819 820 if (!ds->drv->get_eee) 821 return -EOPNOTSUPP; 822 823 ret = ds->drv->get_eee(ds, p->port, e); 824 if (ret) 825 return ret; 826 827 if (p->phy) 828 ret = phy_ethtool_get_eee(p->phy, e); 829 830 return ret; 831 } 832 833 #ifdef CONFIG_NET_POLL_CONTROLLER 834 static int dsa_slave_netpoll_setup(struct net_device *dev, 835 struct netpoll_info *ni) 836 { 837 struct dsa_slave_priv *p = netdev_priv(dev); 838 struct dsa_switch *ds = p->parent; 839 struct net_device *master = ds->dst->master_netdev; 840 struct netpoll *netpoll; 841 int err = 0; 842 843 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); 844 if (!netpoll) 845 return -ENOMEM; 846 847 err = __netpoll_setup(netpoll, master); 848 if (err) { 849 kfree(netpoll); 850 goto out; 851 } 852 853 p->netpoll = netpoll; 854 out: 855 return err; 856 } 857 858 static void dsa_slave_netpoll_cleanup(struct net_device *dev) 859 { 860 struct dsa_slave_priv *p = netdev_priv(dev); 861 struct netpoll *netpoll = p->netpoll; 862 863 if (!netpoll) 864 return; 865 866 p->netpoll = NULL; 867 868 __netpoll_free_async(netpoll); 869 } 870 871 static void dsa_slave_poll_controller(struct net_device *dev) 872 { 873 } 874 #endif 875 876 static const struct ethtool_ops dsa_slave_ethtool_ops = { 877 .get_settings = dsa_slave_get_settings, 878 .set_settings = dsa_slave_set_settings, 879 .get_drvinfo = dsa_slave_get_drvinfo, 880 .get_regs_len = dsa_slave_get_regs_len, 881 .get_regs = dsa_slave_get_regs, 882 .nway_reset = dsa_slave_nway_reset, 883 .get_link = dsa_slave_get_link, 884 .get_eeprom_len = dsa_slave_get_eeprom_len, 885 .get_eeprom = dsa_slave_get_eeprom, 886 .set_eeprom = dsa_slave_set_eeprom, 887 .get_strings = dsa_slave_get_strings, 888 .get_ethtool_stats = dsa_slave_get_ethtool_stats, 889 .get_sset_count = dsa_slave_get_sset_count, 890 .set_wol = dsa_slave_set_wol, 891 .get_wol = dsa_slave_get_wol, 892 .set_eee = dsa_slave_set_eee, 893 .get_eee = dsa_slave_get_eee, 894 }; 895 896 static struct ethtool_ops dsa_cpu_port_ethtool_ops; 897 898 static const struct net_device_ops dsa_slave_netdev_ops = { 899 .ndo_open = dsa_slave_open, 900 .ndo_stop = dsa_slave_close, 901 .ndo_start_xmit = dsa_slave_xmit, 902 .ndo_change_rx_flags = dsa_slave_change_rx_flags, 903 .ndo_set_rx_mode = dsa_slave_set_rx_mode, 904 .ndo_set_mac_address = dsa_slave_set_mac_address, 905 .ndo_fdb_add = switchdev_port_fdb_add, 906 .ndo_fdb_del = switchdev_port_fdb_del, 907 .ndo_fdb_dump = switchdev_port_fdb_dump, 908 .ndo_do_ioctl = dsa_slave_ioctl, 909 .ndo_get_iflink = dsa_slave_get_iflink, 910 #ifdef CONFIG_NET_POLL_CONTROLLER 911 .ndo_netpoll_setup = dsa_slave_netpoll_setup, 912 .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup, 913 .ndo_poll_controller = dsa_slave_poll_controller, 914 #endif 915 .ndo_bridge_getlink = switchdev_port_bridge_getlink, 916 .ndo_bridge_setlink = switchdev_port_bridge_setlink, 917 .ndo_bridge_dellink = switchdev_port_bridge_dellink, 918 }; 919 920 static const struct switchdev_ops dsa_slave_switchdev_ops = { 921 .switchdev_port_attr_get = dsa_slave_port_attr_get, 922 .switchdev_port_attr_set = dsa_slave_port_attr_set, 923 .switchdev_port_obj_add = dsa_slave_port_obj_add, 924 .switchdev_port_obj_del = dsa_slave_port_obj_del, 925 .switchdev_port_obj_dump = dsa_slave_port_obj_dump, 926 }; 927 928 static struct device_type dsa_type = { 929 .name = "dsa", 930 }; 931 932 static void dsa_slave_adjust_link(struct net_device *dev) 933 { 934 struct dsa_slave_priv *p = netdev_priv(dev); 935 struct dsa_switch *ds = p->parent; 936 unsigned int status_changed = 0; 937 938 if (p->old_link != p->phy->link) { 939 status_changed = 1; 940 p->old_link = p->phy->link; 941 } 942 943 if (p->old_duplex != p->phy->duplex) { 944 status_changed = 1; 945 p->old_duplex = p->phy->duplex; 946 } 947 948 if (p->old_pause != p->phy->pause) { 949 status_changed = 1; 950 p->old_pause = p->phy->pause; 951 } 952 953 if (ds->drv->adjust_link && status_changed) 954 ds->drv->adjust_link(ds, p->port, p->phy); 955 956 if (status_changed) 957 phy_print_status(p->phy); 958 } 959 960 static int dsa_slave_fixed_link_update(struct net_device *dev, 961 struct fixed_phy_status *status) 962 { 963 struct dsa_slave_priv *p; 964 struct dsa_switch *ds; 965 966 if (dev) { 967 p = netdev_priv(dev); 968 ds = p->parent; 969 if (ds->drv->fixed_link_update) 970 ds->drv->fixed_link_update(ds, p->port, status); 971 } 972 973 return 0; 974 } 975 976 /* slave device setup *******************************************************/ 977 static int dsa_slave_phy_connect(struct dsa_slave_priv *p, 978 struct net_device *slave_dev, 979 int addr) 980 { 981 struct dsa_switch *ds = p->parent; 982 983 p->phy = mdiobus_get_phy(ds->slave_mii_bus, addr); 984 if (!p->phy) { 985 netdev_err(slave_dev, "no phy at %d\n", addr); 986 return -ENODEV; 987 } 988 989 /* Use already configured phy mode */ 990 if (p->phy_interface == PHY_INTERFACE_MODE_NA) 991 p->phy_interface = p->phy->interface; 992 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link, 993 p->phy_interface); 994 995 return 0; 996 } 997 998 static int dsa_slave_phy_setup(struct dsa_slave_priv *p, 999 struct net_device *slave_dev) 1000 { 1001 struct dsa_switch *ds = p->parent; 1002 struct dsa_chip_data *cd = ds->cd; 1003 struct device_node *phy_dn, *port_dn; 1004 bool phy_is_fixed = false; 1005 u32 phy_flags = 0; 1006 int mode, ret; 1007 1008 port_dn = cd->port_dn[p->port]; 1009 mode = of_get_phy_mode(port_dn); 1010 if (mode < 0) 1011 mode = PHY_INTERFACE_MODE_NA; 1012 p->phy_interface = mode; 1013 1014 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); 1015 if (of_phy_is_fixed_link(port_dn)) { 1016 /* In the case of a fixed PHY, the DT node associated 1017 * to the fixed PHY is the Port DT node 1018 */ 1019 ret = of_phy_register_fixed_link(port_dn); 1020 if (ret) { 1021 netdev_err(slave_dev, "failed to register fixed PHY: %d\n", ret); 1022 return ret; 1023 } 1024 phy_is_fixed = true; 1025 phy_dn = port_dn; 1026 } 1027 1028 if (ds->drv->get_phy_flags) 1029 phy_flags = ds->drv->get_phy_flags(ds, p->port); 1030 1031 if (phy_dn) { 1032 int phy_id = of_mdio_parse_addr(&slave_dev->dev, phy_dn); 1033 1034 /* If this PHY address is part of phys_mii_mask, which means 1035 * that we need to divert reads and writes to/from it, then we 1036 * want to bind this device using the slave MII bus created by 1037 * DSA to make that happen. 1038 */ 1039 if (!phy_is_fixed && phy_id >= 0 && 1040 (ds->phys_mii_mask & (1 << phy_id))) { 1041 ret = dsa_slave_phy_connect(p, slave_dev, phy_id); 1042 if (ret) { 1043 netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret); 1044 return ret; 1045 } 1046 } else { 1047 p->phy = of_phy_connect(slave_dev, phy_dn, 1048 dsa_slave_adjust_link, 1049 phy_flags, 1050 p->phy_interface); 1051 } 1052 } 1053 1054 if (p->phy && phy_is_fixed) 1055 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update); 1056 1057 /* We could not connect to a designated PHY, so use the switch internal 1058 * MDIO bus instead 1059 */ 1060 if (!p->phy) { 1061 ret = dsa_slave_phy_connect(p, slave_dev, p->port); 1062 if (ret) { 1063 netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret); 1064 return ret; 1065 } 1066 } 1067 1068 phy_attached_info(p->phy); 1069 1070 return 0; 1071 } 1072 1073 static struct lock_class_key dsa_slave_netdev_xmit_lock_key; 1074 static void dsa_slave_set_lockdep_class_one(struct net_device *dev, 1075 struct netdev_queue *txq, 1076 void *_unused) 1077 { 1078 lockdep_set_class(&txq->_xmit_lock, 1079 &dsa_slave_netdev_xmit_lock_key); 1080 } 1081 1082 int dsa_slave_suspend(struct net_device *slave_dev) 1083 { 1084 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1085 1086 if (p->phy) { 1087 phy_stop(p->phy); 1088 p->old_pause = -1; 1089 p->old_link = -1; 1090 p->old_duplex = -1; 1091 phy_suspend(p->phy); 1092 } 1093 1094 return 0; 1095 } 1096 1097 int dsa_slave_resume(struct net_device *slave_dev) 1098 { 1099 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1100 1101 netif_device_attach(slave_dev); 1102 1103 if (p->phy) { 1104 phy_resume(p->phy); 1105 phy_start(p->phy); 1106 } 1107 1108 return 0; 1109 } 1110 1111 int dsa_slave_create(struct dsa_switch *ds, struct device *parent, 1112 int port, char *name) 1113 { 1114 struct net_device *master = ds->dst->master_netdev; 1115 struct dsa_switch_tree *dst = ds->dst; 1116 struct net_device *slave_dev; 1117 struct dsa_slave_priv *p; 1118 int ret; 1119 1120 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, 1121 NET_NAME_UNKNOWN, ether_setup); 1122 if (slave_dev == NULL) 1123 return -ENOMEM; 1124 1125 slave_dev->features = master->vlan_features; 1126 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; 1127 if (master->ethtool_ops != &dsa_cpu_port_ethtool_ops) { 1128 memcpy(&dst->master_ethtool_ops, master->ethtool_ops, 1129 sizeof(struct ethtool_ops)); 1130 memcpy(&dsa_cpu_port_ethtool_ops, &dst->master_ethtool_ops, 1131 sizeof(struct ethtool_ops)); 1132 dsa_cpu_port_ethtool_ops.get_sset_count = 1133 dsa_cpu_port_get_sset_count; 1134 dsa_cpu_port_ethtool_ops.get_ethtool_stats = 1135 dsa_cpu_port_get_ethtool_stats; 1136 dsa_cpu_port_ethtool_ops.get_strings = 1137 dsa_cpu_port_get_strings; 1138 master->ethtool_ops = &dsa_cpu_port_ethtool_ops; 1139 } 1140 eth_hw_addr_inherit(slave_dev, master); 1141 slave_dev->priv_flags |= IFF_NO_QUEUE; 1142 slave_dev->netdev_ops = &dsa_slave_netdev_ops; 1143 slave_dev->switchdev_ops = &dsa_slave_switchdev_ops; 1144 SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 1145 1146 netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one, 1147 NULL); 1148 1149 SET_NETDEV_DEV(slave_dev, parent); 1150 slave_dev->dev.of_node = ds->cd->port_dn[port]; 1151 slave_dev->vlan_features = master->vlan_features; 1152 1153 p = netdev_priv(slave_dev); 1154 p->parent = ds; 1155 p->port = port; 1156 1157 switch (ds->dst->tag_protocol) { 1158 #ifdef CONFIG_NET_DSA_TAG_DSA 1159 case DSA_TAG_PROTO_DSA: 1160 p->xmit = dsa_netdev_ops.xmit; 1161 break; 1162 #endif 1163 #ifdef CONFIG_NET_DSA_TAG_EDSA 1164 case DSA_TAG_PROTO_EDSA: 1165 p->xmit = edsa_netdev_ops.xmit; 1166 break; 1167 #endif 1168 #ifdef CONFIG_NET_DSA_TAG_TRAILER 1169 case DSA_TAG_PROTO_TRAILER: 1170 p->xmit = trailer_netdev_ops.xmit; 1171 break; 1172 #endif 1173 #ifdef CONFIG_NET_DSA_TAG_BRCM 1174 case DSA_TAG_PROTO_BRCM: 1175 p->xmit = brcm_netdev_ops.xmit; 1176 break; 1177 #endif 1178 default: 1179 p->xmit = dsa_slave_notag_xmit; 1180 break; 1181 } 1182 1183 p->old_pause = -1; 1184 p->old_link = -1; 1185 p->old_duplex = -1; 1186 1187 ds->ports[port] = slave_dev; 1188 ret = register_netdev(slave_dev); 1189 if (ret) { 1190 netdev_err(master, "error %d registering interface %s\n", 1191 ret, slave_dev->name); 1192 ds->ports[port] = NULL; 1193 free_netdev(slave_dev); 1194 return ret; 1195 } 1196 1197 netif_carrier_off(slave_dev); 1198 1199 ret = dsa_slave_phy_setup(p, slave_dev); 1200 if (ret) { 1201 netdev_err(master, "error %d setting up slave phy\n", ret); 1202 unregister_netdev(slave_dev); 1203 free_netdev(slave_dev); 1204 return ret; 1205 } 1206 1207 return 0; 1208 } 1209 1210 void dsa_slave_destroy(struct net_device *slave_dev) 1211 { 1212 struct dsa_slave_priv *p = netdev_priv(slave_dev); 1213 1214 netif_carrier_off(slave_dev); 1215 if (p->phy) 1216 phy_disconnect(p->phy); 1217 unregister_netdev(slave_dev); 1218 free_netdev(slave_dev); 1219 } 1220 1221 static bool dsa_slave_dev_check(struct net_device *dev) 1222 { 1223 return dev->netdev_ops == &dsa_slave_netdev_ops; 1224 } 1225 1226 static int dsa_slave_port_upper_event(struct net_device *dev, 1227 unsigned long event, void *ptr) 1228 { 1229 struct netdev_notifier_changeupper_info *info = ptr; 1230 struct net_device *upper = info->upper_dev; 1231 int err = 0; 1232 1233 switch (event) { 1234 case NETDEV_CHANGEUPPER: 1235 if (netif_is_bridge_master(upper)) { 1236 if (info->linking) 1237 err = dsa_slave_bridge_port_join(dev, upper); 1238 else 1239 dsa_slave_bridge_port_leave(dev); 1240 } 1241 1242 break; 1243 } 1244 1245 return notifier_from_errno(err); 1246 } 1247 1248 static int dsa_slave_port_event(struct net_device *dev, unsigned long event, 1249 void *ptr) 1250 { 1251 switch (event) { 1252 case NETDEV_CHANGEUPPER: 1253 return dsa_slave_port_upper_event(dev, event, ptr); 1254 } 1255 1256 return NOTIFY_DONE; 1257 } 1258 1259 int dsa_slave_netdevice_event(struct notifier_block *unused, 1260 unsigned long event, void *ptr) 1261 { 1262 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 1263 1264 if (dsa_slave_dev_check(dev)) 1265 return dsa_slave_port_event(dev, event, ptr); 1266 1267 return NOTIFY_DONE; 1268 } 1269