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 <florian@openwrt.org>
   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->master = 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                 const struct dsa_device_ops *tag_ops;
 148                 enum dsa_tag_protocol tag_protocol;
 149
 150                 tag_protocol = ops->get_tag_protocol(ds);
 151                 tag_ops = dsa_resolve_tag_protocol(tag_protocol);
 152                 if (IS_ERR(tag_ops))
 153                         return PTR_ERR(tag_ops);
 154
 155                 dst->cpu_dp->tag_ops = tag_ops;
 156
 157                 /* Few copies for faster access in master receive hot path */
 158                 dst->cpu_dp->rcv = dst->cpu_dp->tag_ops->rcv;
 159                 dst->cpu_dp->dst = dst;
 160         }
 161
 162         memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable));
 163
 164         /*
 165          * Do basic register setup.
 166          */
 167         ret = ops->setup(ds);
 168         if (ret < 0)
 169                 return ret;
 170
 171         ret = dsa_switch_register_notifier(ds);
 172         if (ret)
 173                 return ret;
 174
 175         if (!ds->slave_mii_bus && ops->phy_read) {
 176                 ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev);
 177                 if (!ds->slave_mii_bus)
 178                         return -ENOMEM;
 179                 dsa_slave_mii_bus_init(ds);
 180
 181                 ret = mdiobus_register(ds->slave_mii_bus);
 182                 if (ret < 0)
 183                         return ret;
 184         }
 185
 186         /*
 187          * Create network devices for physical switch ports.
 188          */
 189         for (i = 0; i < ds->num_ports; i++) {
 190                 ds->ports[i].dn = cd->port_dn[i];
 191                 ds->ports[i].cpu_dp = dst->cpu_dp;
 192
 193                 if (!(ds->enabled_port_mask & (1 << i)))
 194                         continue;
 195
 196                 ret = dsa_slave_create(&ds->ports[i], cd->port_names[i]);
 197                 if (ret < 0)
 198                         netdev_err(master, "[%d]: can't create dsa slave device for port %d(%s): %d\n",
 199                                    index, i, cd->port_names[i], ret);
 200         }
 201
 202         /* Perform configuration of the CPU and DSA ports */
 203         ret = dsa_cpu_dsa_setups(ds);
 204         if (ret < 0)
 205                 netdev_err(master, "[%d] : can't configure CPU and DSA ports\n",
 206                            index);
 207
 208         return 0;
 209 }
 210
 211 static struct dsa_switch *
 212 dsa_switch_setup(struct dsa_switch_tree *dst, struct net_device *master,
 213                  int index, struct device *parent, struct device *host_dev)
 214 {
 215         struct dsa_chip_data *cd = dst->pd->chip + index;
 216         const struct dsa_switch_ops *ops;
 217         struct dsa_switch *ds;
 218         int ret;
 219         const char *name;
 220         void *priv;
 221
 222         /*
 223          * Probe for switch model.
 224          */
 225         ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv);
 226         if (!ops) {
 227                 netdev_err(master, "[%d]: could not detect attached switch\n",
 228                            index);
 229                 return ERR_PTR(-EINVAL);
 230         }
 231         netdev_info(master, "[%d]: detected a %s switch\n",
 232                     index, name);
 233
 234
 235         /*
 236          * Allocate and initialise switch state.
 237          */
 238         ds = dsa_switch_alloc(parent, DSA_MAX_PORTS);
 239         if (!ds)
 240                 return ERR_PTR(-ENOMEM);
 241
 242         ds->dst = dst;
 243         ds->index = index;
 244         ds->cd = cd;
 245         ds->ops = ops;
 246         ds->priv = priv;
 247
 248         ret = dsa_switch_setup_one(ds, master);
 249         if (ret)
 250                 return ERR_PTR(ret);
 251
 252         return ds;
 253 }
 254
 255 static void dsa_switch_destroy(struct dsa_switch *ds)
 256 {
 257         int port;
 258
 259         /* Destroy network devices for physical switch ports. */
 260         for (port = 0; port < ds->num_ports; port++) {
 261                 if (!(ds->enabled_port_mask & (1 << port)))
 262                         continue;
 263
 264                 if (!ds->ports[port].slave)
 265                         continue;
 266
 267                 dsa_slave_destroy(ds->ports[port].slave);
 268         }
 269
 270         /* Disable configuration of the CPU and DSA ports */
 271         for (port = 0; port < ds->num_ports; port++) {
 272                 if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
 273                         continue;
 274                 dsa_cpu_dsa_destroy(&ds->ports[port]);
 275
 276                 /* Clearing a bit which is not set does no harm */
 277                 ds->cpu_port_mask |= ~(1 << port);
 278                 ds->dsa_port_mask |= ~(1 << port);
 279         }
 280
 281         if (ds->slave_mii_bus && ds->ops->phy_read)
 282                 mdiobus_unregister(ds->slave_mii_bus);
 283
 284         dsa_switch_unregister_notifier(ds);
 285 }
 286
 287 /* platform driver init and cleanup *****************************************/
 288 static int dev_is_class(struct device *dev, void *class)
 289 {
 290         if (dev->class != NULL && !strcmp(dev->class->name, class))
 291                 return 1;
 292
 293         return 0;
 294 }
 295
 296 static struct device *dev_find_class(struct device *parent, char *class)
 297 {
 298         if (dev_is_class(parent, class)) {
 299                 get_device(parent);
 300                 return parent;
 301         }
 302
 303         return device_find_child(parent, class, dev_is_class);
 304 }
 305
 306 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
 307 {
 308         struct device *d;
 309
 310         d = dev_find_class(dev, "mdio_bus");
 311         if (d != NULL) {
 312                 struct mii_bus *bus;
 313
 314                 bus = to_mii_bus(d);
 315                 put_device(d);
 316
 317                 return bus;
 318         }
 319
 320         return NULL;
 321 }
 322 EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
 323
 324 #ifdef CONFIG_OF
 325 static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
 326                                         struct dsa_chip_data *cd,
 327                                         int chip_index, int port_index,
 328                                         struct device_node *link)
 329 {
 330         const __be32 *reg;
 331         int link_sw_addr;
 332         struct device_node *parent_sw;
 333         int len;
 334
 335         parent_sw = of_get_parent(link);
 336         if (!parent_sw)
 337                 return -EINVAL;
 338
 339         reg = of_get_property(parent_sw, "reg", &len);
 340         if (!reg || (len != sizeof(*reg) * 2))
 341                 return -EINVAL;
 342
 343         /*
 344          * Get the destination switch number from the second field of its 'reg'
 345          * property, i.e. for "reg = <0x19 1>" sw_addr is '1'.
 346          */
 347         link_sw_addr = be32_to_cpup(reg + 1);
 348
 349         if (link_sw_addr >= pd->nr_chips)
 350                 return -EINVAL;
 351
 352         cd->rtable[link_sw_addr] = port_index;
 353
 354         return 0;
 355 }
 356
 357 static int dsa_of_probe_links(struct dsa_platform_data *pd,
 358                               struct dsa_chip_data *cd,
 359                               int chip_index, int port_index,
 360                               struct device_node *port,
 361                               const char *port_name)
 362 {
 363         struct device_node *link;
 364         int link_index;
 365         int ret;
 366
 367         for (link_index = 0;; link_index++) {
 368                 link = of_parse_phandle(port, "link", link_index);
 369                 if (!link)
 370                         break;
 371
 372                 if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) {
 373                         ret = dsa_of_setup_routing_table(pd, cd, chip_index,
 374                                                          port_index, link);
 375                         if (ret)
 376                                 return ret;
 377                 }
 378         }
 379         return 0;
 380 }
 381
 382 static void dsa_of_free_platform_data(struct dsa_platform_data *pd)
 383 {
 384         int i;
 385         int port_index;
 386
 387         for (i = 0; i < pd->nr_chips; i++) {
 388                 port_index = 0;
 389                 while (port_index < DSA_MAX_PORTS) {
 390                         kfree(pd->chip[i].port_names[port_index]);
 391                         port_index++;
 392                 }
 393
 394                 /* Drop our reference to the MDIO bus device */
 395                 if (pd->chip[i].host_dev)
 396                         put_device(pd->chip[i].host_dev);
 397         }
 398         kfree(pd->chip);
 399 }
 400
 401 static int dsa_of_probe(struct device *dev)
 402 {
 403         struct device_node *np = dev->of_node;
 404         struct device_node *child, *mdio, *ethernet, *port;
 405         struct mii_bus *mdio_bus, *mdio_bus_switch;
 406         struct net_device *ethernet_dev;
 407         struct dsa_platform_data *pd;
 408         struct dsa_chip_data *cd;
 409         const char *port_name;
 410         int chip_index, port_index;
 411         const unsigned int *sw_addr, *port_reg;
 412         u32 eeprom_len;
 413         int ret;
 414
 415         mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
 416         if (!mdio)
 417                 return -EINVAL;
 418
 419         mdio_bus = of_mdio_find_bus(mdio);
 420         if (!mdio_bus)
 421                 return -EPROBE_DEFER;
 422
 423         ethernet = of_parse_phandle(np, "dsa,ethernet", 0);
 424         if (!ethernet) {
 425                 ret = -EINVAL;
 426                 goto out_put_mdio;
 427         }
 428
 429         ethernet_dev = of_find_net_device_by_node(ethernet);
 430         if (!ethernet_dev) {
 431                 ret = -EPROBE_DEFER;
 432                 goto out_put_mdio;
 433         }
 434
 435         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 436         if (!pd) {
 437                 ret = -ENOMEM;
 438                 goto out_put_ethernet;
 439         }
 440
 441         dev->platform_data = pd;
 442         pd->of_netdev = ethernet_dev;
 443         pd->nr_chips = of_get_available_child_count(np);
 444         if (pd->nr_chips > DSA_MAX_SWITCHES)
 445                 pd->nr_chips = DSA_MAX_SWITCHES;
 446
 447         pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data),
 448                            GFP_KERNEL);
 449         if (!pd->chip) {
 450                 ret = -ENOMEM;
 451                 goto out_free;
 452         }
 453
 454         chip_index = -1;
 455         for_each_available_child_of_node(np, child) {
 456                 int i;
 457
 458                 chip_index++;
 459                 cd = &pd->chip[chip_index];
 460
 461                 cd->of_node = child;
 462
 463                 /* Initialize the routing table */
 464                 for (i = 0; i < DSA_MAX_SWITCHES; ++i)
 465                         cd->rtable[i] = DSA_RTABLE_NONE;
 466
 467                 /* When assigning the host device, increment its refcount */
 468                 cd->host_dev = get_device(&mdio_bus->dev);
 469
 470                 sw_addr = of_get_property(child, "reg", NULL);
 471                 if (!sw_addr)
 472                         continue;
 473
 474                 cd->sw_addr = be32_to_cpup(sw_addr);
 475                 if (cd->sw_addr >= PHY_MAX_ADDR)
 476                         continue;
 477
 478                 if (!of_property_read_u32(child, "eeprom-length", &eeprom_len))
 479                         cd->eeprom_len = eeprom_len;
 480
 481                 mdio = of_parse_phandle(child, "mii-bus", 0);
 482                 if (mdio) {
 483                         mdio_bus_switch = of_mdio_find_bus(mdio);
 484                         if (!mdio_bus_switch) {
 485                                 ret = -EPROBE_DEFER;
 486                                 goto out_free_chip;
 487                         }
 488
 489                         /* Drop the mdio_bus device ref, replacing the host
 490                          * device with the mdio_bus_switch device, keeping
 491                          * the refcount from of_mdio_find_bus() above.
 492                          */
 493                         put_device(cd->host_dev);
 494                         cd->host_dev = &mdio_bus_switch->dev;
 495                 }
 496
 497                 for_each_available_child_of_node(child, port) {
 498                         port_reg = of_get_property(port, "reg", NULL);
 499                         if (!port_reg)
 500                                 continue;
 501
 502                         port_index = be32_to_cpup(port_reg);
 503                         if (port_index >= DSA_MAX_PORTS)
 504                                 break;
 505
 506                         port_name = of_get_property(port, "label", NULL);
 507                         if (!port_name)
 508                                 continue;
 509
 510                         cd->port_dn[port_index] = port;
 511
 512                         cd->port_names[port_index] = kstrdup(port_name,
 513                                         GFP_KERNEL);
 514                         if (!cd->port_names[port_index]) {
 515                                 ret = -ENOMEM;
 516                                 goto out_free_chip;
 517                         }
 518
 519                         ret = dsa_of_probe_links(pd, cd, chip_index,
 520                                                  port_index, port, port_name);
 521                         if (ret)
 522                                 goto out_free_chip;
 523
 524                 }
 525         }
 526
 527         /* The individual chips hold their own refcount on the mdio bus,
 528          * so drop ours */
 529         put_device(&mdio_bus->dev);
 530
 531         return 0;
 532
 533 out_free_chip:
 534         dsa_of_free_platform_data(pd);
 535 out_free:
 536         kfree(pd);
 537         dev->platform_data = NULL;
 538 out_put_ethernet:
 539         put_device(&ethernet_dev->dev);
 540 out_put_mdio:
 541         put_device(&mdio_bus->dev);
 542         return ret;
 543 }
 544
 545 static void dsa_of_remove(struct device *dev)
 546 {
 547         struct dsa_platform_data *pd = dev->platform_data;
 548
 549         if (!dev->of_node)
 550                 return;
 551
 552         dsa_of_free_platform_data(pd);
 553         put_device(&pd->of_netdev->dev);
 554         kfree(pd);
 555 }
 556 #else
 557 static inline int dsa_of_probe(struct device *dev)
 558 {
 559         return 0;
 560 }
 561
 562 static inline void dsa_of_remove(struct device *dev)
 563 {
 564 }
 565 #endif
 566
 567 static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev,
 568                          struct device *parent, struct dsa_platform_data *pd)
 569 {
 570         int i;
 571         unsigned configured = 0;
 572
 573         dst->pd = pd;
 574
 575         for (i = 0; i < pd->nr_chips; i++) {
 576                 struct dsa_switch *ds;
 577
 578                 ds = dsa_switch_setup(dst, dev, i, parent, pd->chip[i].host_dev);
 579                 if (IS_ERR(ds)) {
 580                         netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n",
 581                                    i, PTR_ERR(ds));
 582                         continue;
 583                 }
 584
 585                 dst->ds[i] = ds;
 586
 587                 ++configured;
 588         }
 589
 590         /*
 591          * If no switch was found, exit cleanly
 592          */
 593         if (!configured)
 594                 return -EPROBE_DEFER;
 595
 596         /*
 597          * If we use a tagging format that doesn't have an ethertype
 598          * field, make sure that all packets from this point on get
 599          * sent to the tag format's receive function.
 600          */
 601         wmb();
 602         dev->dsa_ptr = dst->cpu_dp;
 603
 604         return dsa_master_ethtool_setup(dst->cpu_dp->master);
 605 }
 606
 607 static int dsa_probe(struct platform_device *pdev)
 608 {
 609         struct dsa_platform_data *pd = pdev->dev.platform_data;
 610         struct net_device *dev;
 611         struct dsa_switch_tree *dst;
 612         int ret;
 613
 614         if (pdev->dev.of_node) {
 615                 ret = dsa_of_probe(&pdev->dev);
 616                 if (ret)
 617                         return ret;
 618
 619                 pd = pdev->dev.platform_data;
 620         }
 621
 622         if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL))
 623                 return -EINVAL;
 624
 625         if (pd->of_netdev) {
 626                 dev = pd->of_netdev;
 627                 dev_hold(dev);
 628         } else {
 629                 dev = dsa_dev_to_net_device(pd->netdev);
 630         }
 631         if (dev == NULL) {
 632                 ret = -EPROBE_DEFER;
 633                 goto out;
 634         }
 635
 636         if (dev->dsa_ptr != NULL) {
 637                 dev_put(dev);
 638                 ret = -EEXIST;
 639                 goto out;
 640         }
 641
 642         dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
 643         if (dst == NULL) {
 644                 dev_put(dev);
 645                 ret = -ENOMEM;
 646                 goto out;
 647         }
 648
 649         platform_set_drvdata(pdev, dst);
 650
 651         ret = dsa_setup_dst(dst, dev, &pdev->dev, pd);
 652         if (ret) {
 653                 dev_put(dev);
 654                 goto out;
 655         }
 656
 657         return 0;
 658
 659 out:
 660         dsa_of_remove(&pdev->dev);
 661
 662         return ret;
 663 }
 664
 665 static void dsa_remove_dst(struct dsa_switch_tree *dst)
 666 {
 667         int i;
 668
 669         dsa_master_ethtool_restore(dst->cpu_dp->master);
 670
 671         dst->cpu_dp->master->dsa_ptr = NULL;
 672
 673         /* If we used a tagging format that doesn't have an ethertype
 674          * field, make sure that all packets from this point get sent
 675          * without the tag and go through the regular receive path.
 676          */
 677         wmb();
 678
 679         for (i = 0; i < dst->pd->nr_chips; i++) {
 680                 struct dsa_switch *ds = dst->ds[i];
 681
 682                 if (ds)
 683                         dsa_switch_destroy(ds);
 684         }
 685
 686         dev_put(dst->cpu_dp->master);
 687 }
 688
 689 static int dsa_remove(struct platform_device *pdev)
 690 {
 691         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 692
 693         dsa_remove_dst(dst);
 694         dsa_of_remove(&pdev->dev);
 695
 696         return 0;
 697 }
 698
 699 static void dsa_shutdown(struct platform_device *pdev)
 700 {
 701 }
 702
 703 #ifdef CONFIG_PM_SLEEP
 704 static int dsa_suspend(struct device *d)
 705 {
 706         struct platform_device *pdev = to_platform_device(d);
 707         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 708         int i, ret = 0;
 709
 710         for (i = 0; i < dst->pd->nr_chips; i++) {
 711                 struct dsa_switch *ds = dst->ds[i];
 712
 713                 if (ds != NULL)
 714                         ret = dsa_switch_suspend(ds);
 715         }
 716
 717         return ret;
 718 }
 719
 720 static int dsa_resume(struct device *d)
 721 {
 722         struct platform_device *pdev = to_platform_device(d);
 723         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 724         int i, ret = 0;
 725
 726         for (i = 0; i < dst->pd->nr_chips; i++) {
 727                 struct dsa_switch *ds = dst->ds[i];
 728
 729                 if (ds != NULL)
 730                         ret = dsa_switch_resume(ds);
 731         }
 732
 733         return ret;
 734 }
 735 #endif
 736
 737 /* legacy way, bypassing the bridge *****************************************/
 738 int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 739                        struct net_device *dev,
 740                        const unsigned char *addr, u16 vid,
 741                        u16 flags)
 742 {
 743         struct dsa_port *dp = dsa_slave_to_port(dev);
 744
 745         return dsa_port_fdb_add(dp, addr, vid);
 746 }
 747
 748 int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
 749                        struct net_device *dev,
 750                        const unsigned char *addr, u16 vid)
 751 {
 752         struct dsa_port *dp = dsa_slave_to_port(dev);
 753
 754         return dsa_port_fdb_del(dp, addr, vid);
 755 }
 756
 757 static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
 758
 759 static const struct of_device_id dsa_of_match_table[] = {
 760         { .compatible = "marvell,dsa", },
 761         {}
 762 };
 763 MODULE_DEVICE_TABLE(of, dsa_of_match_table);
 764
 765 static struct platform_driver dsa_driver = {
 766         .probe          = dsa_probe,
 767         .remove         = dsa_remove,
 768         .shutdown       = dsa_shutdown,
 769         .driver = {
 770                 .name   = "dsa",
 771                 .of_match_table = dsa_of_match_table,
 772                 .pm     = &dsa_pm_ops,
 773         },
 774 };
 775
 776 int dsa_legacy_register(void)
 777 {
 778         return platform_driver_register(&dsa_driver);
 779 }
 780
 781 void dsa_legacy_unregister(void)
 782 {
 783         platform_driver_unregister(&dsa_driver);
 784 }