net/dsa/legacy.c

   1 /*
   2  * net/dsa/legacy.c - Hardware switch handling
   3  * Copyright (c) 2008-2009 Marvell Semiconductor
   4  * Copyright (c) 2013 Florian Fainelli <[email protected]>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/device.h>
  13 #include <linux/list.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/slab.h>
  16 #include <linux/module.h>
  17 #include <linux/of.h>
  18 #include <linux/of_mdio.h>
  19 #include <linux/of_platform.h>
  20 #include <linux/of_net.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/sysfs.h>
  23 #include <linux/phy_fixed.h>
  24 #include <linux/etherdevice.h>
  25
  26 #include "dsa_priv.h"
  27
  28 /* switch driver registration ***********************************************/
  29 static DEFINE_MUTEX(dsa_switch_drivers_mutex);
  30 static LIST_HEAD(dsa_switch_drivers);
  31
  32 void register_switch_driver(struct dsa_switch_driver *drv)
  33 {
  34         mutex_lock(&dsa_switch_drivers_mutex);
  35         list_add_tail(&drv->list, &dsa_switch_drivers);
  36         mutex_unlock(&dsa_switch_drivers_mutex);
  37 }
  38 EXPORT_SYMBOL_GPL(register_switch_driver);
  39
  40 void unregister_switch_driver(struct dsa_switch_driver *drv)
  41 {
  42         mutex_lock(&dsa_switch_drivers_mutex);
  43         list_del_init(&drv->list);
  44         mutex_unlock(&dsa_switch_drivers_mutex);
  45 }
  46 EXPORT_SYMBOL_GPL(unregister_switch_driver);
  47
  48 static const struct dsa_switch_ops *
  49 dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr,
  50                  const char **_name, void **priv)
  51 {
  52         const struct dsa_switch_ops *ret;
  53         struct list_head *list;
  54         const char *name;
  55
  56         ret = NULL;
  57         name = NULL;
  58
  59         mutex_lock(&dsa_switch_drivers_mutex);
  60         list_for_each(list, &dsa_switch_drivers) {
  61                 const struct dsa_switch_ops *ops;
  62                 struct dsa_switch_driver *drv;
  63
  64                 drv = list_entry(list, struct dsa_switch_driver, list);
  65                 ops = drv->ops;
  66
  67                 name = ops->probe(parent, host_dev, sw_addr, priv);
  68                 if (name != NULL) {
  69                         ret = ops;
  70                         break;
  71                 }
  72         }
  73         mutex_unlock(&dsa_switch_drivers_mutex);
  74
  75         *_name = name;
  76
  77         return ret;
  78 }
  79
  80 /* basic switch operations **************************************************/
  81 static int dsa_cpu_dsa_setups(struct dsa_switch *ds)
  82 {
  83         int ret, port;
  84
  85         for (port = 0; port < ds->num_ports; port++) {
  86                 if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
  87                         continue;
  88
  89                 ret = dsa_cpu_dsa_setup(&ds->ports[port]);
  90                 if (ret)
  91                         return ret;
  92         }
  93         return 0;
  94 }
  95
  96 static int dsa_switch_setup_one(struct dsa_switch *ds,
  97                                 struct net_device *master)
  98 {
  99         const struct dsa_switch_ops *ops = ds->ops;
 100         struct dsa_switch_tree *dst = ds->dst;
 101         struct dsa_chip_data *cd = ds->cd;
 102         bool valid_name_found = false;
 103         int index = ds->index;
 104         int i, ret;
 105
 106         /*
 107          * Validate supplied switch configuration.
 108          */
 109         for (i = 0; i < ds->num_ports; i++) {
 110                 char *name;
 111
 112                 name = cd->port_names[i];
 113                 if (name == NULL)
 114                         continue;
 115
 116                 if (!strcmp(name, "cpu")) {
 117                         if (dst->cpu_dp) {
 118                                 netdev_err(master,
 119                                            "multiple cpu ports?!\n");
 120                                 return -EINVAL;
 121                         }
 122                         dst->cpu_dp = &ds->ports[i];
 123                         dst->cpu_dp->netdev = master;
 124                         ds->cpu_port_mask |= 1 << i;
 125                 } else if (!strcmp(name, "dsa")) {
 126                         ds->dsa_port_mask |= 1 << i;
 127                 } else {
 128                         ds->enabled_port_mask |= 1 << i;
 129                 }
 130                 valid_name_found = true;
 131         }
 132
 133         if (!valid_name_found && i == ds->num_ports)
 134                 return -EINVAL;
 135
 136         /* Make the built-in MII bus mask match the number of ports,
 137          * switch drivers can override this later
 138          */
 139         ds->phys_mii_mask = ds->enabled_port_mask;
 140
 141         /*
 142          * If the CPU connects to this switch, set the switch tree
 143          * tagging protocol to the preferred tagging format of this
 144          * switch.
 145          */
 146         if (dst->cpu_dp->ds == ds) {
 147                 enum dsa_tag_protocol tag_protocol;
 148
 149                 tag_protocol = ops->get_tag_protocol(ds);
 150                 dst->tag_ops = dsa_resolve_tag_protocol(tag_protocol);
 151                 if (IS_ERR(dst->tag_ops))
 152                         return PTR_ERR(dst->tag_ops);
 153
 154                 dst->rcv = dst->tag_ops->rcv;
 155         }
 156
 157         memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable));
 158
 159         /*
 160          * Do basic register setup.
 161          */
 162         ret = ops->setup(ds);
 163         if (ret < 0)
 164                 return ret;
 165
 166         ret = dsa_switch_register_notifier(ds);
 167         if (ret)
 168                 return ret;
 169
 170         if (ops->set_addr) {
 171                 ret = ops->set_addr(ds, master->dev_addr);
 172                 if (ret < 0)
 173                         return ret;
 174         }
 175
 176         if (!ds->slave_mii_bus && ops->phy_read) {
 177                 ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev);
 178                 if (!ds->slave_mii_bus)
 179                         return -ENOMEM;
 180                 dsa_slave_mii_bus_init(ds);
 181
 182                 ret = mdiobus_register(ds->slave_mii_bus);
 183                 if (ret < 0)
 184                         return ret;
 185         }
 186
 187         /*
 188          * Create network devices for physical switch ports.
 189          */
 190         for (i = 0; i < ds->num_ports; i++) {
 191                 ds->ports[i].dn = cd->port_dn[i];
 192                 ds->ports[i].cpu_dp = dst->cpu_dp;
 193
 194                 if (!(ds->enabled_port_mask & (1 << i)))
 195                         continue;
 196
 197                 ret = dsa_slave_create(&ds->ports[i], cd->port_names[i]);
 198                 if (ret < 0)
 199                         netdev_err(master, "[%d]: can't create dsa slave device for port %d(%s): %d\n",
 200                                    index, i, cd->port_names[i], ret);
 201         }
 202
 203         /* Perform configuration of the CPU and DSA ports */
 204         ret = dsa_cpu_dsa_setups(ds);
 205         if (ret < 0)
 206                 netdev_err(master, "[%d] : can't configure CPU and DSA ports\n",
 207                            index);
 208
 209         return 0;
 210 }
 211
 212 static struct dsa_switch *
 213 dsa_switch_setup(struct dsa_switch_tree *dst, struct net_device *master,
 214                  int index, struct device *parent, struct device *host_dev)
 215 {
 216         struct dsa_chip_data *cd = dst->pd->chip + index;
 217         const struct dsa_switch_ops *ops;
 218         struct dsa_switch *ds;
 219         int ret;
 220         const char *name;
 221         void *priv;
 222
 223         /*
 224          * Probe for switch model.
 225          */
 226         ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv);
 227         if (!ops) {
 228                 netdev_err(master, "[%d]: could not detect attached switch\n",
 229                            index);
 230                 return ERR_PTR(-EINVAL);
 231         }
 232         netdev_info(master, "[%d]: detected a %s switch\n",
 233                     index, name);
 234
 235
 236         /*
 237          * Allocate and initialise switch state.
 238          */
 239         ds = dsa_switch_alloc(parent, DSA_MAX_PORTS);
 240         if (!ds)
 241                 return ERR_PTR(-ENOMEM);
 242
 243         ds->dst = dst;
 244         ds->index = index;
 245         ds->cd = cd;
 246         ds->ops = ops;
 247         ds->priv = priv;
 248
 249         ret = dsa_switch_setup_one(ds, master);
 250         if (ret)
 251                 return ERR_PTR(ret);
 252
 253         return ds;
 254 }
 255
 256 static void dsa_switch_destroy(struct dsa_switch *ds)
 257 {
 258         int port;
 259
 260         /* Destroy network devices for physical switch ports. */
 261         for (port = 0; port < ds->num_ports; port++) {
 262                 if (!(ds->enabled_port_mask & (1 << port)))
 263                         continue;
 264
 265                 if (!ds->ports[port].netdev)
 266                         continue;
 267
 268                 dsa_slave_destroy(ds->ports[port].netdev);
 269         }
 270
 271         /* Disable configuration of the CPU and DSA ports */
 272         for (port = 0; port < ds->num_ports; port++) {
 273                 if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
 274                         continue;
 275                 dsa_cpu_dsa_destroy(&ds->ports[port]);
 276
 277                 /* Clearing a bit which is not set does no harm */
 278                 ds->cpu_port_mask |= ~(1 << port);
 279                 ds->dsa_port_mask |= ~(1 << port);
 280         }
 281
 282         if (ds->slave_mii_bus && ds->ops->phy_read)
 283                 mdiobus_unregister(ds->slave_mii_bus);
 284
 285         dsa_switch_unregister_notifier(ds);
 286 }
 287
 288 /* platform driver init and cleanup *****************************************/
 289 static int dev_is_class(struct device *dev, void *class)
 290 {
 291         if (dev->class != NULL && !strcmp(dev->class->name, class))
 292                 return 1;
 293
 294         return 0;
 295 }
 296
 297 static struct device *dev_find_class(struct device *parent, char *class)
 298 {
 299         if (dev_is_class(parent, class)) {
 300                 get_device(parent);
 301                 return parent;
 302         }
 303
 304         return device_find_child(parent, class, dev_is_class);
 305 }
 306
 307 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
 308 {
 309         struct device *d;
 310
 311         d = dev_find_class(dev, "mdio_bus");
 312         if (d != NULL) {
 313                 struct mii_bus *bus;
 314
 315                 bus = to_mii_bus(d);
 316                 put_device(d);
 317
 318                 return bus;
 319         }
 320
 321         return NULL;
 322 }
 323 EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
 324
 325 #ifdef CONFIG_OF
 326 static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
 327                                         struct dsa_chip_data *cd,
 328                                         int chip_index, int port_index,
 329                                         struct device_node *link)
 330 {
 331         const __be32 *reg;
 332         int link_sw_addr;
 333         struct device_node *parent_sw;
 334         int len;
 335
 336         parent_sw = of_get_parent(link);
 337         if (!parent_sw)
 338                 return -EINVAL;
 339
 340         reg = of_get_property(parent_sw, "reg", &len);
 341         if (!reg || (len != sizeof(*reg) * 2))
 342                 return -EINVAL;
 343
 344         /*
 345          * Get the destination switch number from the second field of its 'reg'
 346          * property, i.e. for "reg = <0x19 1>" sw_addr is '1'.
 347          */
 348         link_sw_addr = be32_to_cpup(reg + 1);
 349
 350         if (link_sw_addr >= pd->nr_chips)
 351                 return -EINVAL;
 352
 353         cd->rtable[link_sw_addr] = port_index;
 354
 355         return 0;
 356 }
 357
 358 static int dsa_of_probe_links(struct dsa_platform_data *pd,
 359                               struct dsa_chip_data *cd,
 360                               int chip_index, int port_index,
 361                               struct device_node *port,
 362                               const char *port_name)
 363 {
 364         struct device_node *link;
 365         int link_index;
 366         int ret;
 367
 368         for (link_index = 0;; link_index++) {
 369                 link = of_parse_phandle(port, "link", link_index);
 370                 if (!link)
 371                         break;
 372
 373                 if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) {
 374                         ret = dsa_of_setup_routing_table(pd, cd, chip_index,
 375                                                          port_index, link);
 376                         if (ret)
 377                                 return ret;
 378                 }
 379         }
 380         return 0;
 381 }
 382
 383 static void dsa_of_free_platform_data(struct dsa_platform_data *pd)
 384 {
 385         int i;
 386         int port_index;
 387
 388         for (i = 0; i < pd->nr_chips; i++) {
 389                 port_index = 0;
 390                 while (port_index < DSA_MAX_PORTS) {
 391                         kfree(pd->chip[i].port_names[port_index]);
 392                         port_index++;
 393                 }
 394
 395                 /* Drop our reference to the MDIO bus device */
 396                 if (pd->chip[i].host_dev)
 397                         put_device(pd->chip[i].host_dev);
 398         }
 399         kfree(pd->chip);
 400 }
 401
 402 static int dsa_of_probe(struct device *dev)
 403 {
 404         struct device_node *np = dev->of_node;
 405         struct device_node *child, *mdio, *ethernet, *port;
 406         struct mii_bus *mdio_bus, *mdio_bus_switch;
 407         struct net_device *ethernet_dev;
 408         struct dsa_platform_data *pd;
 409         struct dsa_chip_data *cd;
 410         const char *port_name;
 411         int chip_index, port_index;
 412         const unsigned int *sw_addr, *port_reg;
 413         u32 eeprom_len;
 414         int ret;
 415
 416         mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
 417         if (!mdio)
 418                 return -EINVAL;
 419
 420         mdio_bus = of_mdio_find_bus(mdio);
 421         if (!mdio_bus)
 422                 return -EPROBE_DEFER;
 423
 424         ethernet = of_parse_phandle(np, "dsa,ethernet", 0);
 425         if (!ethernet) {
 426                 ret = -EINVAL;
 427                 goto out_put_mdio;
 428         }
 429
 430         ethernet_dev = of_find_net_device_by_node(ethernet);
 431         if (!ethernet_dev) {
 432                 ret = -EPROBE_DEFER;
 433                 goto out_put_mdio;
 434         }
 435
 436         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 437         if (!pd) {
 438                 ret = -ENOMEM;
 439                 goto out_put_ethernet;
 440         }
 441
 442         dev->platform_data = pd;
 443         pd->of_netdev = ethernet_dev;
 444         pd->nr_chips = of_get_available_child_count(np);
 445         if (pd->nr_chips > DSA_MAX_SWITCHES)
 446                 pd->nr_chips = DSA_MAX_SWITCHES;
 447
 448         pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data),
 449                            GFP_KERNEL);
 450         if (!pd->chip) {
 451                 ret = -ENOMEM;
 452                 goto out_free;
 453         }
 454
 455         chip_index = -1;
 456         for_each_available_child_of_node(np, child) {
 457                 int i;
 458
 459                 chip_index++;
 460                 cd = &pd->chip[chip_index];
 461
 462                 cd->of_node = child;
 463
 464                 /* Initialize the routing table */
 465                 for (i = 0; i < DSA_MAX_SWITCHES; ++i)
 466                         cd->rtable[i] = DSA_RTABLE_NONE;
 467
 468                 /* When assigning the host device, increment its refcount */
 469                 cd->host_dev = get_device(&mdio_bus->dev);
 470
 471                 sw_addr = of_get_property(child, "reg", NULL);
 472                 if (!sw_addr)
 473                         continue;
 474
 475                 cd->sw_addr = be32_to_cpup(sw_addr);
 476                 if (cd->sw_addr >= PHY_MAX_ADDR)
 477                         continue;
 478
 479                 if (!of_property_read_u32(child, "eeprom-length", &eeprom_len))
 480                         cd->eeprom_len = eeprom_len;
 481
 482                 mdio = of_parse_phandle(child, "mii-bus", 0);
 483                 if (mdio) {
 484                         mdio_bus_switch = of_mdio_find_bus(mdio);
 485                         if (!mdio_bus_switch) {
 486                                 ret = -EPROBE_DEFER;
 487                                 goto out_free_chip;
 488                         }
 489
 490                         /* Drop the mdio_bus device ref, replacing the host
 491                          * device with the mdio_bus_switch device, keeping
 492                          * the refcount from of_mdio_find_bus() above.
 493                          */
 494                         put_device(cd->host_dev);
 495                         cd->host_dev = &mdio_bus_switch->dev;
 496                 }
 497
 498                 for_each_available_child_of_node(child, port) {
 499                         port_reg = of_get_property(port, "reg", NULL);
 500                         if (!port_reg)
 501                                 continue;
 502
 503                         port_index = be32_to_cpup(port_reg);
 504                         if (port_index >= DSA_MAX_PORTS)
 505                                 break;
 506
 507                         port_name = of_get_property(port, "label", NULL);
 508                         if (!port_name)
 509                                 continue;
 510
 511                         cd->port_dn[port_index] = port;
 512
 513                         cd->port_names[port_index] = kstrdup(port_name,
 514                                         GFP_KERNEL);
 515                         if (!cd->port_names[port_index]) {
 516                                 ret = -ENOMEM;
 517                                 goto out_free_chip;
 518                         }
 519
 520                         ret = dsa_of_probe_links(pd, cd, chip_index,
 521                                                  port_index, port, port_name);
 522                         if (ret)
 523                                 goto out_free_chip;
 524
 525                 }
 526         }
 527
 528         /* The individual chips hold their own refcount on the mdio bus,
 529          * so drop ours */
 530         put_device(&mdio_bus->dev);
 531
 532         return 0;
 533
 534 out_free_chip:
 535         dsa_of_free_platform_data(pd);
 536 out_free:
 537         kfree(pd);
 538         dev->platform_data = NULL;
 539 out_put_ethernet:
 540         put_device(&ethernet_dev->dev);
 541 out_put_mdio:
 542         put_device(&mdio_bus->dev);
 543         return ret;
 544 }
 545
 546 static void dsa_of_remove(struct device *dev)
 547 {
 548         struct dsa_platform_data *pd = dev->platform_data;
 549
 550         if (!dev->of_node)
 551                 return;
 552
 553         dsa_of_free_platform_data(pd);
 554         put_device(&pd->of_netdev->dev);
 555         kfree(pd);
 556 }
 557 #else
 558 static inline int dsa_of_probe(struct device *dev)
 559 {
 560         return 0;
 561 }
 562
 563 static inline void dsa_of_remove(struct device *dev)
 564 {
 565 }
 566 #endif
 567
 568 static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev,
 569                          struct device *parent, struct dsa_platform_data *pd)
 570 {
 571         int i;
 572         unsigned configured = 0;
 573
 574         dst->pd = pd;
 575
 576         for (i = 0; i < pd->nr_chips; i++) {
 577                 struct dsa_switch *ds;
 578
 579                 ds = dsa_switch_setup(dst, dev, i, parent, pd->chip[i].host_dev);
 580                 if (IS_ERR(ds)) {
 581                         netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n",
 582                                    i, PTR_ERR(ds));
 583                         continue;
 584                 }
 585
 586                 dst->ds[i] = ds;
 587
 588                 ++configured;
 589         }
 590
 591         /*
 592          * If no switch was found, exit cleanly
 593          */
 594         if (!configured)
 595                 return -EPROBE_DEFER;
 596
 597         /*
 598          * If we use a tagging format that doesn't have an ethertype
 599          * field, make sure that all packets from this point on get
 600          * sent to the tag format's receive function.
 601          */
 602         wmb();
 603         dev->dsa_ptr = dst;
 604
 605         return dsa_master_ethtool_setup(dst->cpu_dp->netdev);
 606 }
 607
 608 static int dsa_probe(struct platform_device *pdev)
 609 {
 610         struct dsa_platform_data *pd = pdev->dev.platform_data;
 611         struct net_device *dev;
 612         struct dsa_switch_tree *dst;
 613         int ret;
 614
 615         if (pdev->dev.of_node) {
 616                 ret = dsa_of_probe(&pdev->dev);
 617                 if (ret)
 618                         return ret;
 619
 620                 pd = pdev->dev.platform_data;
 621         }
 622
 623         if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL))
 624                 return -EINVAL;
 625
 626         if (pd->of_netdev) {
 627                 dev = pd->of_netdev;
 628                 dev_hold(dev);
 629         } else {
 630                 dev = dsa_dev_to_net_device(pd->netdev);
 631         }
 632         if (dev == NULL) {
 633                 ret = -EPROBE_DEFER;
 634                 goto out;
 635         }
 636
 637         if (dev->dsa_ptr != NULL) {
 638                 dev_put(dev);
 639                 ret = -EEXIST;
 640                 goto out;
 641         }
 642
 643         dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
 644         if (dst == NULL) {
 645                 dev_put(dev);
 646                 ret = -ENOMEM;
 647                 goto out;
 648         }
 649
 650         platform_set_drvdata(pdev, dst);
 651
 652         ret = dsa_setup_dst(dst, dev, &pdev->dev, pd);
 653         if (ret) {
 654                 dev_put(dev);
 655                 goto out;
 656         }
 657
 658         return 0;
 659
 660 out:
 661         dsa_of_remove(&pdev->dev);
 662
 663         return ret;
 664 }
 665
 666 static void dsa_remove_dst(struct dsa_switch_tree *dst)
 667 {
 668         int i;
 669
 670         dsa_master_ethtool_restore(dst->cpu_dp->netdev);
 671
 672         dst->cpu_dp->netdev->dsa_ptr = NULL;
 673
 674         /* If we used a tagging format that doesn't have an ethertype
 675          * field, make sure that all packets from this point get sent
 676          * without the tag and go through the regular receive path.
 677          */
 678         wmb();
 679
 680         for (i = 0; i < dst->pd->nr_chips; i++) {
 681                 struct dsa_switch *ds = dst->ds[i];
 682
 683                 if (ds)
 684                         dsa_switch_destroy(ds);
 685         }
 686
 687         dev_put(dst->cpu_dp->netdev);
 688 }
 689
 690 static int dsa_remove(struct platform_device *pdev)
 691 {
 692         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 693
 694         dsa_remove_dst(dst);
 695         dsa_of_remove(&pdev->dev);
 696
 697         return 0;
 698 }
 699
 700 static void dsa_shutdown(struct platform_device *pdev)
 701 {
 702 }
 703
 704 #ifdef CONFIG_PM_SLEEP
 705 static int dsa_suspend(struct device *d)
 706 {
 707         struct platform_device *pdev = to_platform_device(d);
 708         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 709         int i, ret = 0;
 710
 711         for (i = 0; i < dst->pd->nr_chips; i++) {
 712                 struct dsa_switch *ds = dst->ds[i];
 713
 714                 if (ds != NULL)
 715                         ret = dsa_switch_suspend(ds);
 716         }
 717
 718         return ret;
 719 }
 720
 721 static int dsa_resume(struct device *d)
 722 {
 723         struct platform_device *pdev = to_platform_device(d);
 724         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 725         int i, ret = 0;
 726
 727         for (i = 0; i < dst->pd->nr_chips; i++) {
 728                 struct dsa_switch *ds = dst->ds[i];
 729
 730                 if (ds != NULL)
 731                         ret = dsa_switch_resume(ds);
 732         }
 733
 734         return ret;
 735 }
 736 #endif
 737
 738 /* legacy way, bypassing the bridge *****************************************/
 739 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 740                        struct net_device *dev,
 741                        const unsigned char *addr, u16 vid,
 742                        u16 flags)
 743 {
 744         struct dsa_slave_priv *p = netdev_priv(dev);
 745         struct dsa_port *dp = p->dp;
 746
 747         return dsa_port_fdb_add(dp, addr, vid);
 748 }
 749
 750 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 751                        struct net_device *dev,
 752                        const unsigned char *addr, u16 vid)
 753 {
 754         struct dsa_slave_priv *p = netdev_priv(dev);
 755         struct dsa_port *dp = p->dp;
 756
 757         return dsa_port_fdb_del(dp, addr, vid);
 758 }
 759
 760 static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
 761
 762 static const struct of_device_id dsa_of_match_table[] = {
 763         { .compatible = "marvell,dsa", },
 764         {}
 765 };
 766 MODULE_DEVICE_TABLE(of, dsa_of_match_table);
 767
 768 static struct platform_driver dsa_driver = {
 769         .probe          = dsa_probe,
 770         .remove         = dsa_remove,
 771         .shutdown       = dsa_shutdown,
 772         .driver = {
 773                 .name   = "dsa",
 774                 .of_match_table = dsa_of_match_table,
 775                 .pm     = &dsa_pm_ops,
 776         },
 777 };
 778
 779 int dsa_legacy_register(void)
 780 {
 781         return platform_driver_register(&dsa_driver);
 782 }
 783
 784 void dsa_legacy_unregister(void)
 785 {
 786         platform_driver_unregister(&dsa_driver);
 787 }