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